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Message-Id: <1382544921-17012-1-git-send-email-haver@linux.vnet.ibm.com>
Date: Wed, 23 Oct 2013 18:15:21 +0200
From: Frank Haverkamp <haver@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: arnd@...db.de, gregkh@...uxfoundation.org, cody@...ux.vnet.ibm.com,
schwidefsky@...ibm.com, utz.bacher@...ibm.com, jsvogt@...ibm.com,
MIJUNG@...ibm.com, cascardo@...ux.vnet.ibm.com, michael@...ra.de,
haver@...ux.vnet.ibm.com
Subject: [PATCH] Generic WorkQueue Engine (GenWQE) device driver v2
Rework comments:
o Removed __DATE__ macros as suggested by Michal Marek
o Removed startup pr_info() as suggested by Greg KH
Plus some little things we found during test and review:
o Removed some obsolete comments
o Fixed a bug in the initialization path when
genwqe_set_interrupt_capability() fails
Greg, I tried my luck now with git send-email. Please let
me know if that works better.
Signed-off-by: Frank Haverkamp <haver@...ux.vnet.ibm.com>
Co-authors: Joerg-Stephan Vogt <jsvogt@...ibm.com>,
Michael Jung <MIJUNG@...ibm.com>,
Michael Ruettger <michael@...ra.de>
---
drivers/misc/Kconfig | 1 +
drivers/misc/Makefile | 1 +
drivers/misc/genwqe/Kconfig | 23 +
drivers/misc/genwqe/Makefile | 8 +
drivers/misc/genwqe/card_base.c | 1305 ++++++++++++++++++++++++++++
drivers/misc/genwqe/card_base.h | 515 +++++++++++
drivers/misc/genwqe/card_ddcb.c | 1377 ++++++++++++++++++++++++++++++
drivers/misc/genwqe/card_ddcb.h | 159 ++++
drivers/misc/genwqe/card_dev.c | 1614 +++++++++++++++++++++++++++++++++++
drivers/misc/genwqe/card_sysfs.c | 645 ++++++++++++++
drivers/misc/genwqe/card_utils.c | 1032 ++++++++++++++++++++++
drivers/misc/genwqe/genwqe_driver.h | 83 ++
include/linux/genwqe/genwqe_card.h | 697 +++++++++++++++
13 files changed, 7460 insertions(+), 0 deletions(-)
create mode 100644 drivers/misc/genwqe/Kconfig
create mode 100644 drivers/misc/genwqe/Makefile
create mode 100644 drivers/misc/genwqe/card_base.c
create mode 100644 drivers/misc/genwqe/card_base.h
create mode 100644 drivers/misc/genwqe/card_ddcb.c
create mode 100644 drivers/misc/genwqe/card_ddcb.h
create mode 100644 drivers/misc/genwqe/card_dev.c
create mode 100644 drivers/misc/genwqe/card_sysfs.c
create mode 100644 drivers/misc/genwqe/card_utils.c
create mode 100644 drivers/misc/genwqe/genwqe_driver.h
create mode 100644 include/linux/genwqe/genwqe_card.h
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 8dacd4c..92142cf 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -537,4 +537,5 @@ source "drivers/misc/carma/Kconfig"
source "drivers/misc/altera-stapl/Kconfig"
source "drivers/misc/mei/Kconfig"
source "drivers/misc/vmw_vmci/Kconfig"
+source "drivers/misc/genwqe/Kconfig"
endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c235d5b..62a3dfb 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -53,3 +53,4 @@ obj-$(CONFIG_INTEL_MEI) += mei/
obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/
obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o
obj-$(CONFIG_SRAM) += sram.o
+obj-$(CONFIG_GENWQE) += genwqe/
diff --git a/drivers/misc/genwqe/Kconfig b/drivers/misc/genwqe/Kconfig
new file mode 100644
index 0000000..bbf137d
--- /dev/null
+++ b/drivers/misc/genwqe/Kconfig
@@ -0,0 +1,23 @@
+#
+# IBM Accelerator Family 'GenWQE'
+#
+
+menuconfig GENWQE
+ tristate "GenWQE PCIe Accelerator"
+ depends on PCI && 64BIT
+ select CRC_ITU_T
+ default n
+ help
+ Enables PCIe card driver for IBM GenWQE accelerators.
+ The user-space interface is described in
+ include/linux/genwqe/genwqe_card.h.
+
+if GENWQE
+
+config GENWQE_DEVNAME
+ string "Name for sysfs and device nodes"
+ default "genwqe"
+ help
+ Select alternate name for sysfs and device nodes.
+
+endif
diff --git a/drivers/misc/genwqe/Makefile b/drivers/misc/genwqe/Makefile
new file mode 100644
index 0000000..880f3f4
--- /dev/null
+++ b/drivers/misc/genwqe/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for GenWQE driver
+#
+
+# card driver
+obj-$(CONFIG_GENWQE) := genwqe_card.o
+genwqe_card-objs := card_base.o card_dev.o card_ddcb.o card_sysfs.o \
+ card_utils.o
diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c
new file mode 100644
index 0000000..0aac769
--- /dev/null
+++ b/drivers/misc/genwqe/card_base.c
@@ -0,0 +1,1305 @@
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Module initialization and PCIe setup. Card health monitoring and
+ * recovery functionality. Character device creation and deletion are
+ * controlled from here.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/device.h>
+#include <linux/log2.h>
+#include <linux/genwqe/genwqe_card.h>
+
+#include "card_base.h"
+#include "card_ddcb.h"
+
+MODULE_AUTHOR("Frank Haverkamp <haver@...ux.vnet.ibm.com>");
+MODULE_AUTHOR("Michael Ruettger");
+MODULE_AUTHOR("Joerg-Stephan Vogt <jsvogt@...ibm.com>");
+MODULE_AUTHOR("Michal Jung <mijung@...ibm.com>");
+
+MODULE_DESCRIPTION("GenWQE Card");
+MODULE_VERSION(DRV_VERS_STRING);
+MODULE_LICENSE("GPL");
+
+/* module parameter */
+int genwqe_debug;
+module_param(genwqe_debug, int, 0644); /* read/writeable */
+MODULE_PARM_DESC(genwqe_debug,
+ "debug mode for extended outputs");
+
+int genwqe_ddcb_software_timeout = 10; /* new val requested by chief tester */
+module_param(genwqe_ddcb_software_timeout, int, 0644); /* read/writeable */
+MODULE_PARM_DESC(genwqe_ddcb_software_timeout,
+ "ddcb_software_timeout in seconds");
+
+int genwqe_skip_reset;
+module_param(genwqe_skip_reset, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_skip_reset,
+ "skip reset of the card");
+
+int genwqe_skip_recovery;
+module_param(genwqe_skip_recovery, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_skip_recovery,
+ "skip recovery after GFIR");
+
+/**
+ * Set this to enable the VFs immediately at startup. Alternatively
+ * one can use the new sysfs interfaces to enable the VFs after PF
+ * driver loading.
+ *
+ * Enable VFs:
+ * sudo sh -c 'echo 15 > /sys/bus/pci/devices/0000\:1b\:00.0/sriov_numvfs'
+ * or
+ * sudo sh -c 'echo 15 > /sys/class/corsa/genwqe0_card/device/sriov_numvfs'
+ *
+ * Disable VFs:
+ * sudo sh -c 'echo 0 > /sys/bus/pci/devices/0000\:1b\:00.0/sriov_numvfs'
+ * or
+ * sudo sh -c 'echo 0 > /sys/class/corsa/genwqe0_card/device/sriov_numvfs'
+ */
+int genwqe_max_num_vfs;
+module_param(genwqe_max_num_vfs, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_max_num_vfs,
+ "limit the number of possible VFs");
+
+int genwqe_ddcb_max = 32;
+module_param(genwqe_ddcb_max, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_ddcb_max,
+ "number of DDCBs on the work-queue");
+
+int genwqe_polling_enabled;
+module_param(genwqe_polling_enabled, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_polling_enabled,
+ "in case of irqs not properly working ...");
+
+int genwqe_health_check_interval = 4; /* <= 0: disabled */
+module_param(genwqe_health_check_interval, int, 0644); /* read/writeable */
+MODULE_PARM_DESC(genwqe_health_check_interval,
+ "check card health every N seconds (0 = disabled)");
+
+#define GENWQE_COLLECT_UNITS (BIT(GENWQE_DBG_UNIT0) | \
+ BIT(GENWQE_DBG_UNIT1) | \
+ BIT(GENWQE_DBG_UNIT2) | \
+ BIT(GENWQE_DBG_REGS))
+
+int genwqe_collect_ffdc_units = GENWQE_COLLECT_UNITS;
+module_param(genwqe_collect_ffdc_units, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_collect_ffdc_units,
+ "bitmask for FFDC gathering during bootup");
+
+/**
+ * GenWQE Driver: Need SLC timeout set to 250ms (temporary setting for
+ * testing of 1000ms due to decompressor testcase failing)
+ *
+ * There is a requirement by the card users that the timeout must not
+ * exceed the 250ms.
+ */
+int genwqe_vf_jobtimeout_msec = 250;
+module_param(genwqe_vf_jobtimeout_msec, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_vf_jobtimeout_msec,
+ "Job timeout for virtual functions");
+
+int genwqe_pf_jobtimeout_msec = 8000; /* 8sec should be ok */
+module_param(genwqe_pf_jobtimeout_msec, int, 0444); /* readable */
+MODULE_PARM_DESC(genwqe_pf_jobtimeout_msec,
+ "Job timeout for physical function");
+
+int genwqe_kill_timeout = 8;
+module_param(genwqe_kill_timeout, int, 0644); /* read/writeable */
+MODULE_PARM_DESC(genwqe_kill_timeout,
+ "time to wait after sending stop signals");
+
+static char genwqe_driver_name[] = GENWQE_DEVNAME;
+static struct class *class_genwqe;
+static struct genwqe_dev *genwqe_devices[GENWQE_CARD_NO_MAX] = { 0, };
+
+static const enum genwqe_dbg_type unitid_to_ffdcid[] = {
+ [0] = GENWQE_DBG_UNIT0, [1] = GENWQE_DBG_UNIT1, [2] = GENWQE_DBG_UNIT2,
+ [3] = GENWQE_DBG_UNIT3, [4] = GENWQE_DBG_UNIT4, [5] = GENWQE_DBG_UNIT5,
+ [6] = GENWQE_DBG_UNIT6, [7] = GENWQE_DBG_UNIT7,
+};
+
+/**
+ * PCI structure for identifying device by PCI vendor and device ID
+ *
+ * FIXME Do not forget to remove the obsolete when development is done ;-)
+*/
+static DEFINE_PCI_DEVICE_TABLE(genwqe_device_table) = {
+ { .vendor = PCI_VENDOR_ID_IBM,
+ .device = PCI_DEVICE_GENWQE,
+ .subvendor = PCI_SUBVENDOR_ID_IBM,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5,
+ .class = (PCI_CLASSCODE_GENWQE5 << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ /* Initial SR-IOV bring-up image */
+ { .vendor = PCI_VENDOR_ID_IBM,
+ .device = PCI_DEVICE_GENWQE,
+ .subvendor = PCI_SUBVENDOR_ID_IBM_SRIOV,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5_SRIOV,
+ .class = (PCI_CLASSCODE_GENWQE5_SRIOV << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ { .vendor = PCI_VENDOR_ID_IBM, /* VF Vendor ID */
+ .device = 0x0000, /* VF Device ID */
+ .subvendor = PCI_SUBVENDOR_ID_IBM_SRIOV,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5_SRIOV,
+ .class = (PCI_CLASSCODE_GENWQE5_SRIOV << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ /* Fixed up image */
+ { .vendor = PCI_VENDOR_ID_IBM,
+ .device = PCI_DEVICE_GENWQE,
+ .subvendor = PCI_SUBVENDOR_ID_IBM_SRIOV,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5,
+ .class = (PCI_CLASSCODE_GENWQE5_SRIOV << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ { .vendor = PCI_VENDOR_ID_IBM, /* VF Vendor ID */
+ .device = 0x0000, /* VF Device ID */
+ .subvendor = PCI_SUBVENDOR_ID_IBM_SRIOV,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5,
+ .class = (PCI_CLASSCODE_GENWQE5_SRIOV << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ /* Even one more ... */
+ { .vendor = PCI_VENDOR_ID_IBM,
+ .device = PCI_DEVICE_GENWQE,
+ .subvendor = PCI_SUBVENDOR_ID_IBM,
+ .subdevice = PCI_SUBSYSTEM_ID_GENWQE5_NEW,
+ .class = (PCI_CLASSCODE_GENWQE5 << 8),
+ .class_mask = ~0,
+ .driver_data = 0 },
+
+ { 0, } /* 0 terminated list. */
+};
+
+MODULE_DEVICE_TABLE(pci, genwqe_device_table);
+
+/**
+ * @brief create and prepare a new card descriptor
+ *
+ * @param err pointer to error indicator
+ * @return NULL if errors (and err is set)
+ * or pointer to card descriptor
+ */
+struct genwqe_dev *genwqe_dev_alloc(int *err)
+{
+ int i = 0;
+ struct genwqe_dev *cd;
+
+ for (i = 0; i < GENWQE_CARD_NO_MAX; i++) {
+ if (genwqe_devices[i] == NULL)
+ break;
+ }
+ if (i >= GENWQE_CARD_NO_MAX) {
+ *err = -ENODEV;
+ return NULL;
+ }
+
+ cd = kzalloc(sizeof(struct genwqe_dev), GFP_KERNEL);
+ if (!cd) {
+ *err = -ENOMEM;
+ return NULL;
+ }
+
+ cd->card_idx = i;
+ cd->class_genwqe = class_genwqe;
+ init_waitqueue_head(&cd->queue_waitq);
+
+ spin_lock_init(&cd->file_lock);
+ INIT_LIST_HEAD(&cd->file_list);
+
+ cd->card_state = GENWQE_CARD_UNUSED;
+ spin_lock_init(&cd->print_lock);
+
+ genwqe_devices[i] = cd; /* do this when everything is fine */
+ *err = 0;
+ return cd;
+}
+
+void genwqe_dev_free(struct genwqe_dev *cd)
+{
+ if (!cd)
+ return;
+
+ genwqe_devices[cd->card_idx] = NULL;
+ memset(cd, 0, sizeof(*cd)); /* make it unusable, just in case ... */
+ kfree(cd);
+}
+
+/**
+ * pci_reset_function will recover the device and ensure that the
+ * registers are accessible again when it completes with success. If
+ * not, the card will stay dead and registers will be unaccessible
+ * still.
+ */
+static int genwqe_bus_reset(struct genwqe_dev *cd)
+{
+ int bars, rc = 0;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ void __iomem *mmio;
+
+ if (cd->err_inject & GENWQE_INJECT_BUS_RESET_FAILURE)
+ return -EIO;
+
+ mmio = cd->mmio;
+ cd->mmio = NULL;
+ pci_iounmap(pci_dev, mmio);
+
+ bars = pci_select_bars(pci_dev, IORESOURCE_MEM);
+ pci_release_selected_regions(pci_dev, bars);
+
+ /**
+ * Firmware/BIOS might change memory mapping during bus reset.
+ * Settings like enable bus-mastering, ... are backuped and
+ * restored by the pci_reset_function().
+ */
+ dev_dbg(&pci_dev->dev, "[%s] pci_reset function ...\n", __func__);
+ rc = pci_reset_function(pci_dev);
+ if (rc) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: failed reset func (rc %d)\n", __func__, rc);
+ return rc;
+ }
+ dev_dbg(&pci_dev->dev, "[%s] done with rc=%d\n", __func__, rc);
+
+ /**
+ * Here is the right spot to clear the register read
+ * failure. pci_bus_reset() does this job in real systems.
+ */
+ if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
+ cd->err_inject &= ~GENWQE_INJECT_HARDWARE_FAILURE;
+
+ if (cd->err_inject & GENWQE_INJECT_GFIR_FATAL)
+ cd->err_inject &= ~GENWQE_INJECT_GFIR_FATAL;
+
+ if (cd->err_inject & GENWQE_INJECT_GFIR_INFO)
+ cd->err_inject &= ~GENWQE_INJECT_GFIR_INFO;
+
+ rc = pci_request_selected_regions(pci_dev, bars, genwqe_driver_name);
+ if (rc) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: request bars failed (%d)\n", __func__, rc);
+ return -EIO;
+ }
+
+ cd->mmio = pci_iomap(pci_dev, 0, 0);
+ if (cd->mmio == NULL) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: mapping BAR0 failed\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+/**
+ * Hardware circumvention section. Certain bitstreams in our test-lab
+ * had different kinds of problems. Here is where we adjust those
+ * bitstreams to function will with this version of our device driver.
+ *
+ * Thise circumventions are applied to the physical function only.
+ *
+ * Unfortunately image 3243 shows a FIR at boot time. This is fixed in
+ * zcomp026f, SVN rev. #269, but this is not yet in the image.
+ *
+ * In order to still get all App Firs (except the "hot" one) after
+ * driver load time, unmask most of the AppFIRs again:
+ * $ sudo tools/genwqe_poke 0x2000020 0x000300000000001f
+ * $ sudo tools/genwqe_poke 0x2000040 0x20
+ */
+
+/* Turn off error reporting for old/manufacturing images */
+int genwqe_need_err_masking(struct genwqe_dev *cd)
+{
+ return (cd->slu_unitcfg & 0xFFFF0ull) < 0x32170ull;
+}
+
+static void genwqe_tweak_hardware(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ /* Mask FIRs for development images */
+ if (((cd->slu_unitcfg & 0xFFFF0ull) >= 0x32000ull) &&
+ ((cd->slu_unitcfg & 0xFFFF0ull) <= 0x33250ull)) {
+ dev_warn(&pci_dev->dev,
+ "FIRs masked due to bitstream %016llx.%016llx\n",
+ cd->slu_unitcfg, cd->app_unitcfg);
+
+ __genwqe_writeq(cd, IO_APP_SEC_LEM_DEBUG_OVR,
+ 0xFFFFFFFFFFFFFFFFull);
+
+ __genwqe_writeq(cd, IO_APP_ERR_ACT_MASK,
+ 0x0000000000000000ull);
+ }
+}
+
+/**
+ * @note Bitstreams older than 2013-02-17 have a bug where fatal GFIRs
+ * must be ignored. This is e.g. true for the bitstream we gave to the
+ * card manufacturer, but also for some old bitstreams we released to
+ * our test-lab.
+ */
+int genwqe_recovery_on_fatal_gfir_required(struct genwqe_dev *cd)
+{
+ return ((cd->slu_unitcfg & 0xFFFF0ull) >= 0x32170ull);
+}
+
+int genwqe_flash_readback_fails(struct genwqe_dev *cd)
+{
+ return ((cd->slu_unitcfg & 0xFFFF0ull) < 0x32170ull);
+}
+
+/**
+ * Note: From a design perspective it turned out to be a bad idea to
+ * use codes here to specifiy the frequency/speed values. An old
+ * driver cannot understand new codes and is therefore always a
+ * problem. Better is to measure out the value or put the
+ * speed/frequency directly into a register which is always a valid
+ * value for old as well as for new software.
+ */
+/* T = 1/f */
+static int genwqe_T_psec(struct genwqe_dev *cd)
+{
+ u16 speed; /* 1/f -> 250, 200, 166, 175 */
+ static const int T[] = { 4000, 5000, 6000, 5714 };
+
+ speed = (u16)((cd->slu_unitcfg >> 28) & 0x0fLLU);
+ if (speed >= ARRAY_SIZE(T))
+ return -1; /* illegal value */
+
+ return T[speed];
+}
+
+/**
+ * Do this _after_ card_reset() is called. Otherwise the values will
+ * vanish.
+ *
+ * The max. timeout value is 2^(10+x) * T (6ns for 166MHz) * 15/16.
+ * The min. timeout value is 2^(10+x) * T (6ns for 166MHz) * 14/16.
+ */
+static int genwqe_setup_jtimer(struct genwqe_dev *cd)
+{
+ u16 totalvfs;
+ int vf, pos;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ u32 T = genwqe_T_psec(cd);
+ u64 x;
+
+ if (genwqe_pf_jobtimeout_msec != -1) {
+ /* PF: large value needed, due to flash update 2sec
+ per block */
+ x = ilog2(genwqe_pf_jobtimeout_msec *
+ 16000000000uL/(T * 15)) - 10;
+ genwqe_write_jtimer(cd, 0, (0xff00 | (x & 0xff)));
+ }
+
+ if (genwqe_vf_jobtimeout_msec != -1) {
+ pos = pci_find_ext_capability(pci_dev, PCI_EXT_CAP_ID_SRIOV);
+ if (pos) {
+ pci_read_config_word(pci_dev, pos + PCI_SRIOV_TOTAL_VF,
+ &totalvfs);
+ cd->num_vfs = totalvfs;
+ }
+ if (totalvfs < 0)
+ return totalvfs;
+
+ x = ilog2(genwqe_vf_jobtimeout_msec *
+ 16000000000uL/(T * 15)) - 10;
+ for (vf = 0; vf < totalvfs; vf++)
+ genwqe_write_jtimer(cd, vf + 1, (0xff00 | (x & 0xff)));
+ }
+
+ return 0;
+}
+
+static int genwqe_ffdc_buffs_alloc(struct genwqe_dev *cd)
+{
+ unsigned int type, e = 0;
+
+ for (type = 0; type < GENWQE_DBG_UNITS; type++) {
+ switch (type) {
+ case GENWQE_DBG_UNIT0:
+ e = genwqe_ffdc_buff_size(cd, 0); break;
+ case GENWQE_DBG_UNIT1:
+ e = genwqe_ffdc_buff_size(cd, 1); break;
+ case GENWQE_DBG_UNIT2:
+ e = genwqe_ffdc_buff_size(cd, 2); break;
+ case GENWQE_DBG_REGS:
+ e = GENWQE_FFDC_REGS; break;
+ }
+
+ /* currently support only the debug units mentioned here */
+ cd->ffdc[type].entries = e;
+ cd->ffdc[type].regs = kmalloc(e * sizeof(struct genwqe_reg),
+ GFP_KERNEL);
+ }
+ return 0;
+}
+
+static void genwqe_ffdc_buffs_free(struct genwqe_dev *cd)
+{
+ unsigned int type;
+
+ for (type = 0; type < GENWQE_DBG_UNITS; type++) {
+ kfree(cd->ffdc[type].regs);
+ cd->ffdc[type].regs = NULL;
+ }
+}
+
+static int genwqe_read_ids(struct genwqe_dev *cd)
+{
+ int err = 0;
+ int slu_id;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ cd->slu_unitcfg = __genwqe_readq(cd, IO_SLU_UNITCFG);
+ if (cd->slu_unitcfg == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "err: SLUID=%016llx\n", cd->slu_unitcfg);
+ err = -EIO;
+ goto out_err;
+ }
+
+ slu_id = genwqe_get_slu_id(cd);
+ if (slu_id < GENWQE_SLU_ARCH_REQ || slu_id == 0xff) {
+ dev_err(&pci_dev->dev,
+ "err: incompatible SLU Architecture %u\n", slu_id);
+ err = -ENOENT;
+ goto out_err;
+ }
+
+ cd->app_unitcfg = __genwqe_readq(cd, IO_APP_UNITCFG);
+ if (cd->app_unitcfg == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "err: APPID=%016llx\n", cd->app_unitcfg);
+ err = -EIO;
+ goto out_err;
+ }
+ genwqe_read_app_id(cd, cd->app_name, sizeof(cd->app_name));
+
+ /**
+ * Is access to all registers possible? If we are a VF the
+ * answer is obvious. If we run fully virtualized, we need to
+ * check if we can access all registers. If we do not have
+ * full access we will cause an UR and some informational FIRs
+ * in the PF, but that should not harm.
+ */
+ if (pci_dev->is_virtfn)
+ cd->is_privileged = 0;
+ else
+ cd->is_privileged = (__genwqe_readq(cd, IO_SLU_BITSTREAM)
+ != IO_ILLEGAL_VALUE);
+
+ out_err:
+ return err;
+}
+
+static int genwqe_start(struct genwqe_dev *cd)
+{
+ int err;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ err = genwqe_read_ids(cd);
+ if (err)
+ return err;
+
+ if (genwqe_is_privileged(cd)) {
+ unsigned int unit_id;
+ enum genwqe_dbg_type ffdcid;
+
+ genwqe_ffdc_buffs_alloc(cd); /* do this after the tweaks */
+ genwqe_stop_traps(cd);
+
+ /* Collect registers e.g. FIRs, UNITIDs, ... */
+ if (genwqe_collect_ffdc_units & BIT(GENWQE_DBG_REGS))
+ genwqe_read_ffdc_regs(cd,
+ cd->ffdc[GENWQE_DBG_REGS].regs,
+ cd->ffdc[GENWQE_DBG_REGS].entries, 0);
+
+ /* Collect traces by unit */
+ for (unit_id = 0; unit_id < GENWQE_MAX_UNITS; unit_id++) {
+ ffdcid = unitid_to_ffdcid[unit_id];
+
+ if (genwqe_collect_ffdc_units & BIT(ffdcid))
+ genwqe_ffdc_buff_read(cd, unit_id,
+ cd->ffdc[ffdcid].regs,
+ cd->ffdc[ffdcid].entries);
+ }
+
+ genwqe_start_traps(cd);
+
+ if (cd->card_state == GENWQE_CARD_FATAL_ERROR) {
+ dev_warn(&pci_dev->dev,
+ "[%s] chip reload/recovery!\n", __func__);
+
+ /* Stealth Mode: Reload chip on either hot
+ reset or PERST. */
+ cd->softreset = 0x7Cull;
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET,
+ cd->softreset);
+
+ err = genwqe_bus_reset(cd);
+ if (err != 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: bus reset failed!\n",
+ __func__);
+ goto out;
+ }
+
+ /* STG Defect 515099 re-read the IDs because
+ it could happen that the bitstream load
+ failed! */
+ err = genwqe_read_ids(cd);
+ if (err)
+ goto out;
+ }
+ }
+
+ err = genwqe_setup_service_layer(cd); /* does a reset to the card */
+ if (err != 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: could not setup servicelayer!\n", __func__);
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (genwqe_is_privileged(cd)) { /* code is running _after_ reset */
+ genwqe_tweak_hardware(cd);
+ genwqe_setup_jtimer(cd); /* queues must not run */
+ }
+
+ err = genwqe_device_create(cd);
+ if (err < 0) {
+ dev_err(&pci_dev->dev,
+ "err: chdev init failed! (err=%d)\n", err);
+ goto out_release_service_layer;
+ }
+
+ if (genwqe_is_privileged(cd)) {
+ err = genwqe_enable_sriov(cd);
+ if (err == -EPERM)
+ dev_warn(&pci_dev->dev,
+ " Cannot enable SR-IOV (-EPERM)\n");
+ else if (err < 0) {
+ dev_err(&pci_dev->dev,
+ " Cannot enable SR-IOV (%d)\n", err);
+ goto out_remove_card_dev;
+ }
+ }
+ return 0;
+
+ out_remove_card_dev:
+ genwqe_device_remove(cd);
+ out_release_service_layer:
+ genwqe_release_service_layer(cd);
+ out:
+ if (genwqe_is_privileged(cd))
+ genwqe_ffdc_buffs_free(cd);
+ return -EIO;
+}
+
+/**
+ * Recovery notes:
+ * As long as genwqe_thread runs we might access registers during
+ * error data capture. Same is with the genwqe_health_thread.
+ * When genwqe_bus_reset() fails this function might called two times:
+ * first by the genwqe_health_thread() and later by genwqe_remove() to
+ * unbind the device. We must be able to survive that.
+ *
+ * @note This function must be robust enough to be called twice.
+ */
+static int genwqe_stop(struct genwqe_dev *cd)
+{
+ genwqe_finish_queue(cd); /* no register access */
+ genwqe_device_remove(cd); /* device removed, procs killed */
+ genwqe_release_service_layer(cd); /* here genwqe_thread is stopped */
+
+ if (genwqe_is_privileged(cd)) {
+ genwqe_disable_sriov(cd); /* access to pci config space */
+ genwqe_ffdc_buffs_free(cd);
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Try to recover the card. If fatal_err is set no register
+ * access is possible anymore. It is likely that genwqe_start fails in
+ * that situation. Proper error handling is required in this case.
+ *
+ * genwqe_bus_reset() will cause the pci code to call genwqe_remove()
+ * and later genwqe_probe() for all virtual functions.
+ */
+static int genwqe_recover_card(struct genwqe_dev *cd, int fatal_err)
+{
+ int rc;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ genwqe_stop(cd);
+
+ /**
+ * Make sure chip is not reloaded to maintain FFDC. Write SLU
+ * Reset Register, CPLDReset field to 0.
+ * FIXME: Need GenWQE Spec update to confirm value!
+ */
+ if (!fatal_err) {
+ cd->softreset = 0x70ull;
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset);
+ }
+
+ rc = genwqe_bus_reset(cd);
+ if (rc != 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: card recovery impossible!\n", __func__);
+ return rc;
+ }
+
+ rc = genwqe_start(cd);
+ if (rc < 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: failed to launch device!\n", __func__);
+ return rc;
+ }
+ return 0;
+}
+
+static int genwqe_health_check_cond(struct genwqe_dev *cd, u64 *gfir)
+{
+ *gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ return (*gfir & GFIR_ERR_TRIGGER) &&
+ genwqe_recovery_on_fatal_gfir_required(cd);
+}
+
+/**
+ * If this code works ok, can be tried out with help of the genwqe_poke tool:
+ * sudo ./tools/genwqe_poke 0x8 0xfefefefefef
+ *
+ * Now the relevant FIRs/sFIRs should be printed out and the driver should
+ * invoke recovery (devices are removed and readded).
+ */
+static u64 genwqe_fir_checking(struct genwqe_dev *cd)
+{
+ int j, iterations = 0;
+ u64 mask, fir, fec, uid, gfir, gfir_masked, sfir, sfec;
+ u32 fir_addr, fir_clr_addr, fec_addr, sfir_addr, sfec_addr;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ healthMonitor:
+ iterations++;
+ if (iterations > 16) {
+ dev_err(&pci_dev->dev, "* exit looping after %d times\n",
+ iterations);
+ goto fatal_error;
+ }
+
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ if (gfir != 0x0)
+ dev_err(&pci_dev->dev, "* 0x%08x 0x%016llx\n",
+ IO_SLC_CFGREG_GFIR, gfir);
+ if (gfir == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ /**
+ * Avoid printing when to GFIR bit is on prevents contignous
+ * printout e.g. for the following bug:
+ * FIR set without a 2ndary FIR/FIR cannot be cleared
+ * Comment out the following if to get the prints:
+ */
+ if (gfir == 0)
+ return 0;
+
+ gfir_masked = gfir & GFIR_ERR_TRIGGER; /* fatal errors */
+
+ for (uid = 0; uid < GENWQE_MAX_UNITS; uid++) { /* 0..2 in zEDC */
+
+ /* read the primary FIR (pfir) */
+ fir_addr = (uid << 24) + 0x08;
+ fir = __genwqe_readq(cd, fir_addr);
+ if (fir == 0x0)
+ continue; /* no error in this unit */
+
+ dev_err(&pci_dev->dev, "* 0x%08x 0x%016llx\n", fir_addr, fir);
+ if (fir == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ /* read primary FEC */
+ fec_addr = (uid << 24) + 0x18;
+ fec = __genwqe_readq(cd, fec_addr);
+
+ dev_err(&pci_dev->dev, "* 0x%08x 0x%016llx\n", fec_addr, fec);
+ if (fec == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ for (j = 0, mask = 1ULL; j < 64; j++, mask <<= 1) {
+
+ /* secondary fir empty, skip it */
+ if ((fir & mask) == 0x0)
+ continue;
+
+ sfir_addr = (uid << 24) + 0x100 + 0x08 * j;
+ sfir = __genwqe_readq(cd, sfir_addr);
+
+ if (sfir == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+ dev_err(&pci_dev->dev,
+ "* 0x%08x 0x%016llx\n", sfir_addr, sfir);
+
+ sfec_addr = (uid << 24) + 0x300 + 0x08 * j;
+ sfec = __genwqe_readq(cd, sfec_addr);
+
+ if (sfec == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+ dev_err(&pci_dev->dev,
+ "* 0x%08x 0x%016llx\n", sfec_addr, sfec);
+
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ if (gfir == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ /* gfir turned on during routine! get out and
+ start over. */
+ if ((gfir_masked == 0x0) &&
+ (gfir & GFIR_ERR_TRIGGER)) {
+ /* dev_warn(&pci_dev->dev,
+ "ACK! Another FIR! Recursing %d!\n",
+ iterations); */
+ goto healthMonitor;
+ }
+
+ /* do not clear if we entered with a fatal gfir */
+ if (gfir_masked == 0x0) {
+
+ /* NEW clear by mask the logged bits */
+ sfir_addr = (uid << 24) + 0x100 + 0x08 * j;
+ __genwqe_writeq(cd, sfir_addr, sfir);
+
+ dev_dbg(&pci_dev->dev,
+ "[HM] Clearing 2ndary FIR 0x%08x "
+ "with 0x%016llx\n", sfir_addr, sfir);
+
+ /**
+ * note, these cannot be error-Firs
+ * since gfir_masked is 0 after sfir
+ * was read. Also, it is safe to do
+ * this write if sfir=0. Still need to
+ * clear the primary. This just means
+ * there is no secondary FIR.
+ */
+
+ /* clear by mask the logged bit. */
+ fir_clr_addr = (uid << 24) + 0x10;
+ __genwqe_writeq(cd, fir_clr_addr, mask);
+
+ dev_dbg(&pci_dev->dev,
+ "[HM] Clearing primary FIR 0x%08x "
+ "with 0x%016llx\n", fir_clr_addr,
+ mask);
+ }
+ }
+ }
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ if (gfir == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ if ((gfir_masked == 0x0) && (gfir & GFIR_ERR_TRIGGER)) {
+ /**
+ * Check once more that it didn't go on after all the
+ * FIRS were cleared.
+ */
+ dev_dbg(&pci_dev->dev, "ACK! Another FIR! Recursing %d!\n",
+ iterations);
+ goto healthMonitor;
+ }
+ return gfir_masked;
+
+ fatal_error:
+ return IO_ILLEGAL_VALUE;
+}
+
+/**
+ * This thread monitors the health of the card. A critical situation
+ * is when we read registers which contain -1 (IO_ILLEGAL_VALUE). In
+ * this case we need to be recovered from outside. Writing to
+ * registers will very likely not work either.
+ *
+ * This thread must only exit if kthread_should_stop() becomes true.
+ *
+ * Testing bind/unbind with:
+ * sudo sh -c "echo -n 0000:20:00.0 > /sys/bus/pci/drivers/genwqe/unbind"
+ * sudo sh -c "echo -n 0000:20:00.0 > /sys/bus/pci/drivers/genwqe/bind"
+ *
+ * Condition for the health-thread to trigger:
+ * a) when a kthread_stop() request comes in or
+ * b) a critical GFIR occured
+ *
+ * Informational GFIRs are checked and potentially printed in
+ * health_check_interval seconds.
+ *
+ * Testcase to trigger this code:
+ * Fatal GFIR:
+ * sudo ./tools/genwqe_poke -C0 0x00000008 0x001
+ * Info GFIR by writing to VF:
+ * sudo ./tools/genwqe_poke -C2 0x00020020 0x800
+ */
+static int genwqe_health_thread(void *data)
+{
+ int rc, should_stop = 0;
+ struct genwqe_dev *cd = (struct genwqe_dev *)data;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ u64 gfir, gfir_masked, slu_unitcfg, app_unitcfg;
+
+ while (!kthread_should_stop()) {
+ rc = wait_event_interruptible_timeout(cd->health_waitq,
+ (genwqe_health_check_cond(cd, &gfir) ||
+ (should_stop = kthread_should_stop())),
+ genwqe_health_check_interval * HZ);
+
+ if (should_stop)
+ break;
+
+ if (gfir == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "[%s] GFIR=%016llx\n", __func__, gfir);
+ goto fatal_error;
+ }
+
+ slu_unitcfg = __genwqe_readq(cd, IO_SLU_UNITCFG);
+ if (slu_unitcfg == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "[%s] SLU_UNITCFG=%016llx\n",
+ __func__, slu_unitcfg);
+ goto fatal_error;
+ }
+
+ app_unitcfg = __genwqe_readq(cd, IO_APP_UNITCFG);
+ if (app_unitcfg == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "[%s] APP_UNITCFG=%016llx\n",
+ __func__, app_unitcfg);
+ goto fatal_error;
+ }
+
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ if (gfir == IO_ILLEGAL_VALUE) {
+ dev_err(&pci_dev->dev,
+ "[%s] %s: GFIR=%016llx\n", __func__,
+ (gfir & GFIR_ERR_TRIGGER) ? "err" : "info",
+ gfir);
+ goto fatal_error;
+ }
+
+ gfir_masked = genwqe_fir_checking(cd);
+ if (gfir_masked == IO_ILLEGAL_VALUE)
+ goto fatal_error;
+
+ /**
+ * GFIR ErrorTrigger bits set => reset the card!
+ * Never do this for old/manufacturing images!
+ */
+ if ((gfir_masked) && !genwqe_skip_recovery &&
+ genwqe_recovery_on_fatal_gfir_required(cd)) {
+
+ cd->card_state = GENWQE_CARD_FATAL_ERROR;
+
+ rc = genwqe_recover_card(cd, 0);
+ if (rc < 0) {
+ /* FIXME Card is unusable and needs unbind! */
+ goto fatal_error;
+ }
+ }
+
+ cd->last_gfir = gfir;
+ cond_resched();
+ }
+
+ return 0;
+
+ fatal_error:
+ dev_err(&pci_dev->dev,
+ "[%s] card unusable. Please trigger unbind!\n", __func__);
+
+ /* Bring down logical devices to inform user space via udev remove. */
+ cd->card_state = GENWQE_CARD_FATAL_ERROR;
+ genwqe_stop(cd);
+
+ /* genwqe_bus_reset failed(). Now wait for genwqe_remove(). */
+ while (!kthread_should_stop())
+ cond_resched();
+
+ return -EIO;
+}
+
+static int genwqe_health_check_start(struct genwqe_dev *cd)
+{
+ int rc;
+
+ if (genwqe_health_check_interval <= 0)
+ return 0; /* valid for disabling the service */
+
+ /* moved before request_irq() */
+ /* init_waitqueue_head(&cd->health_waitq); */
+
+ cd->health_thread = kthread_run(genwqe_health_thread, cd,
+ GENWQE_DEVNAME "%d_health",
+ cd->card_idx);
+ if (IS_ERR(cd->health_thread)) {
+ rc = PTR_ERR(cd->health_thread);
+ cd->health_thread = NULL;
+ return rc;
+ }
+ return 0;
+}
+
+static int genwqe_health_thread_running(struct genwqe_dev *cd)
+{
+ return (cd->health_thread != NULL);
+}
+
+static int genwqe_health_check_stop(struct genwqe_dev *cd)
+{
+ int rc;
+
+ if (!genwqe_health_thread_running(cd))
+ return -EIO;
+
+ rc = kthread_stop(cd->health_thread);
+ cd->health_thread = NULL;
+ return 0;
+}
+
+/**
+ * @brief Allocate PCIe related resources for our card.
+ */
+static int genwqe_pci_setup(struct genwqe_dev *cd)
+{
+ int err, bars;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ bars = pci_select_bars(pci_dev, IORESOURCE_MEM);
+ err = pci_enable_device_mem(pci_dev);
+ if (err) {
+ dev_err(&pci_dev->dev,
+ "err: failed to enable pci memory (err=%d)\n", err);
+ goto err_out;
+ }
+
+ /* Reserve PCI I/O and memory resources */
+ err = pci_request_selected_regions(pci_dev, bars, genwqe_driver_name);
+ if (err) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: request bars failed (%d)\n", __func__, err);
+ err = -EIO;
+ goto err_disable_device;
+ }
+
+ /* check for 64-bit DMA address supported (DAC) */
+ if (!pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64))) {
+ err = pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(64));
+ if (err) {
+ dev_err(&pci_dev->dev,
+ "err: DMA64 consistent mask error\n");
+ err = -EIO;
+ goto out_release_resources;
+ }
+ /* check for 32-bit DMA address supported (SAC) */
+ } else if (!pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32))) {
+ err = pci_set_consistent_dma_mask(pci_dev, DMA_BIT_MASK(32));
+ if (err) {
+ dev_err(&pci_dev->dev,
+ "err: DMA32 consistent mask error\n");
+ err = -EIO;
+ goto out_release_resources;
+ }
+ } else {
+ dev_err(&pci_dev->dev,
+ "err: neither DMA32 nor DMA64 supported\n");
+ err = -EIO;
+ goto out_release_resources;
+ }
+
+ pci_set_master(pci_dev);
+ pci_enable_pcie_error_reporting(pci_dev);
+
+ /* request complete BAR-0 space (length = 0) */
+ cd->mmio_len = pci_resource_len(pci_dev, 0);
+ cd->mmio = pci_iomap(pci_dev, 0, 0);
+ if (cd->mmio == NULL) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: mapping BAR0 failed\n", __func__);
+ err = -ENOMEM;
+ goto out_release_resources;
+ }
+
+ err = genwqe_read_ids(cd);
+ if (err)
+ goto out_iounmap;
+
+ return 0;
+
+ out_iounmap:
+ pci_iounmap(pci_dev, cd->mmio);
+ out_release_resources:
+ pci_release_selected_regions(pci_dev, bars);
+ err_disable_device:
+ pci_disable_device(pci_dev);
+ err_out:
+ return err;
+}
+
+/**
+ * @brief Free PCIe related resources for our card.
+ */
+static void genwqe_pci_remove(struct genwqe_dev *cd)
+{
+ int bars;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (cd->mmio)
+ pci_iounmap(pci_dev, cd->mmio);
+
+ bars = pci_select_bars(pci_dev, IORESOURCE_MEM);
+ pci_release_selected_regions(pci_dev, bars);
+ pci_disable_device(pci_dev);
+}
+
+/**
+ * @brief device initialization
+ * Callable for multiple cards. No __devinit attribute applicable.
+ * This function is called on bind.
+ *
+ * @pdev PCI device information struct
+ * @return 0 if succeeded, < 0 when failed
+ */
+static int genwqe_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *id)
+{
+ int err;
+ struct genwqe_dev *cd;
+
+ init_crc32();
+
+ cd = genwqe_dev_alloc(&err);
+ if (cd == NULL) {
+ dev_err(&pci_dev->dev,
+ "err: could not allocate memory!\n");
+ return err;
+ }
+
+ dev_set_drvdata(&pci_dev->dev, cd);
+ cd->pci_dev = pci_dev;
+ cd->num_vfs = genwqe_max_num_vfs;
+
+ err = genwqe_pci_setup(cd);
+ if (err < 0) {
+ dev_err(&pci_dev->dev,
+ "err: problems with PCI setup (err=%d)\n", err);
+ goto out_free_dev;
+ }
+
+ err = genwqe_start(cd);
+ if (err < 0) {
+ dev_err(&pci_dev->dev,
+ "err: cannot start card services! (err=%d)\n", err);
+ goto out_pci_remove;
+ }
+
+ if (genwqe_is_privileged(cd)) {
+ err = genwqe_health_check_start(cd);
+ if (err < 0) {
+ dev_err(&pci_dev->dev,
+ "err: cannot start health checking! "
+ "(err=%d)\n", err);
+ goto out_stop_services;
+ }
+ }
+ return 0;
+
+ out_stop_services:
+ genwqe_stop(cd);
+ out_pci_remove:
+ genwqe_pci_remove(cd);
+ out_free_dev:
+ genwqe_dev_free(cd);
+ return err;
+}
+
+/**
+ * @brief Called when device is removed (hot-plugable)
+ * or when driver is unloaded respecitively when unbind is done.
+ */
+static void genwqe_remove(struct pci_dev *pci_dev)
+{
+ struct genwqe_dev *cd = dev_get_drvdata(&pci_dev->dev);
+
+ genwqe_health_check_stop(cd);
+
+ /**
+ * genwqe_stop() must survive if it is called twice
+ * sequentially. This happens when the health thread calls it
+ * and fails on genwqe_bus_reset().
+ */
+ genwqe_stop(cd);
+ genwqe_pci_remove(cd);
+ genwqe_dev_free(cd);
+}
+
+/*
+ * This callback is called by the PCI subsystem whenever
+ * a PCI bus error is detected.
+ */
+static pci_ers_result_t genwqe_err_error_detected(struct pci_dev *pci_dev,
+ enum pci_channel_state state)
+{
+ pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET;
+ struct genwqe_dev *cd;
+
+ dev_err(&pci_dev->dev,
+ "[%s] state=%d\n", __func__, state);
+
+ if (pci_dev == NULL)
+ return result;
+
+ cd = dev_get_drvdata(&pci_dev->dev);
+ if (cd == NULL)
+ return result;
+
+ switch (state) {
+ case pci_channel_io_normal:
+ result = PCI_ERS_RESULT_CAN_RECOVER;
+ break;
+ case pci_channel_io_frozen:
+ result = PCI_ERS_RESULT_NEED_RESET;
+ break;
+ case pci_channel_io_perm_failure:
+ result = PCI_ERS_RESULT_DISCONNECT;
+ break;
+ default:
+ result = PCI_ERS_RESULT_NEED_RESET;
+ }
+ return result; /* Request a slot reset. */
+}
+
+static pci_ers_result_t genwqe_err_mmio_enabled(struct pci_dev *dev)
+{
+ return PCI_ERS_RESULT_NONE;
+}
+
+static pci_ers_result_t genwqe_err_link_reset(struct pci_dev *dev)
+{
+ return PCI_ERS_RESULT_NONE;
+}
+
+static pci_ers_result_t genwqe_err_slot_reset(struct pci_dev *dev)
+{
+ return PCI_ERS_RESULT_NONE;
+}
+
+static void genwqe_err_resume(struct pci_dev *dev)
+{
+}
+
+static int genwqe_sriov_configure(struct pci_dev *dev, int numvfs)
+{
+ if (numvfs > 0) {
+ pci_enable_sriov(dev, numvfs);
+ return numvfs;
+ }
+ if (numvfs == 0) {
+ pci_disable_sriov(dev);
+ return 0;
+ }
+ return 0;
+}
+
+static struct pci_error_handlers genwqe_err_handler = {
+ .error_detected = genwqe_err_error_detected,
+ .mmio_enabled = genwqe_err_mmio_enabled,
+ .link_reset = genwqe_err_link_reset,
+ .slot_reset = genwqe_err_slot_reset,
+ .resume = genwqe_err_resume,
+};
+
+static struct pci_driver genwqe_driver = {
+ .name = genwqe_driver_name,
+ .id_table = genwqe_device_table,
+ .probe = genwqe_probe,
+ .remove = genwqe_remove,
+ .sriov_configure = genwqe_sriov_configure,
+ .err_handler = &genwqe_err_handler,
+};
+
+/**
+ * @brief driver registration
+ */
+static int __init genwqe_init_module(void)
+{
+ int rc;
+
+ class_genwqe = class_create(THIS_MODULE, GENWQE_DEVNAME);
+ if (IS_ERR(class_genwqe)) {
+ pr_err("[%s] create class failed\n", __func__);
+ return -ENOMEM;
+ }
+
+ rc = pci_register_driver(&genwqe_driver);
+ if (rc != 0) {
+ pr_err("[%s] pci_reg_driver (rc=%d)\n", __func__, rc);
+ goto err_out;
+ }
+ return rc;
+
+ err_out:
+ class_destroy(class_genwqe);
+ class_genwqe = NULL;
+ return rc;
+}
+
+/**
+ * @brief driver exit
+ */
+static void __exit genwqe_exit_module(void)
+{
+ pci_unregister_driver(&genwqe_driver);
+ class_destroy(class_genwqe);
+ class_genwqe = NULL;
+}
+
+module_init(genwqe_init_module);
+module_exit(genwqe_exit_module);
diff --git a/drivers/misc/genwqe/card_base.h b/drivers/misc/genwqe/card_base.h
new file mode 100644
index 0000000..7a9b9de
--- /dev/null
+++ b/drivers/misc/genwqe/card_base.h
@@ -0,0 +1,515 @@
+#ifndef __CARD_BASE_H__
+#define __CARD_BASE_H__
+
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Interfaces within the GenWQE module. Defines genwqe_card and
+ * ddcb_queue as well as ddcb_requ.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/cdev.h>
+#include <linux/stringify.h>
+#include <linux/pci.h>
+#include <linux/semaphore.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/version.h>
+#include <linux/genwqe/genwqe_card.h>
+
+#include "genwqe_driver.h"
+
+#define GENWQE_MSI_IRQS 4 /**< we use only one until we have MSIx */
+#define GENWQE_MAX_FUNCS 16 /**< max PF and VFs */
+#define GENWQE_CARD_NO_MAX (16 * GENWQE_MAX_FUNCS)
+#define GENWQE_MAX_DEVICES 4 /**< max number for platform devices */
+
+/*< Module parameters */
+extern int genwqe_debug;
+extern int genwqe_skip_reset;
+extern int genwqe_max_num_vfs;
+extern int genwqe_ddcb_max;
+extern int genwqe_ddcb_software_timeout;
+extern int genwqe_polling_enabled;
+extern int genwqe_health_check_interval;
+extern int genwqe_collect_ffdc_units;
+extern int genwqe_kill_timeout;
+
+/**
+ * config space of Genwqe5 A7:
+ * 00:[14 10 4b 04]46 04 10 00[00 00 00 12]10 00 00 00
+ * 10: 0c 00 00 98 00 00 00 00 00 00 00 a0 00 00 00 00
+ * 20: 00 00 00 00 00 00 00 00 00 00 00 00[14 10 5f 03]
+ * 30: 00 00 00 00 50 00 00 00 00 00 00 00 ff 01 00 00
+ *
+ * new config space for Genwqe5 A7:
+ * 00:[14 10 4b 04]40 00 10 00[00 00 00 12]00 00 00 00
+ * 10: 0c 00 00 f0 07 3c 00 00 00 00 00 00 00 00 00 00
+ * 20: 00 00 00 00 00 00 00 00 00 00 00 00[14 10 4b 04]
+ * 30: 00 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00
+ */
+
+#define PCI_DEVICE_GENWQE 0x044b /**< Genwqe DeviceID */
+
+#define PCI_SUBSYSTEM_ID_GENWQE5 0x035f /**< Genwqe A5 Subsystem-ID */
+#define PCI_SUBSYSTEM_ID_GENWQE5_NEW 0x044b /**< Genwqe A5 Subsystem-ID */
+#define PCI_CLASSCODE_GENWQE5 0x1200 /**< UNKNOWN */
+
+#define PCI_SUBVENDOR_ID_IBM_SRIOV 0x0000
+#define PCI_SUBSYSTEM_ID_GENWQE5_SRIOV 0x0000 /**< Genwqe A5 Subsystem-ID */
+#define PCI_CLASSCODE_GENWQE5_SRIOV 0x1200 /**< UNKNOWN */
+
+/* allocation and deallocation helpers */
+#define GENWQE_FLAG_MSI_ENABLED (1 << 8)
+
+/**
+ * required SLU hardware architecture level
+ * 1 = wfo
+ * 2 = zEDC
+ * 3 = zEDC & generic DDCB
+ */
+#define GENWQE_SLU_ARCH_REQ 2
+
+
+/**
+ * Flags for extended output (dbg_print)
+ * We define different levels of debugging for the appropriate unit.
+ */
+#define dbg_card 0x00000001
+#define dbg_card_ddcb 0x00000004
+#define dbg_card_regs 0x00000008
+#define dbg_card_sglist 0x00000400
+#define dbg_card_pinning 0x00000800
+
+extern int debug;
+
+#define dbg_printk(_cd, dbg_unit, fmt, ...) do { \
+ struct genwqe_dev *__cd = (_cd); \
+ if (genwqe_debug & (dbg_unit)) \
+ dev_info(&__cd->pci_dev->dev, fmt, \
+ ## __VA_ARGS__); \
+ } while (0)
+
+/**< Software error injection to simulate card failures */
+#define GENWQE_INJECT_HARDWARE_FAILURE 0x00000001 /* injects -1 reg reads */
+#define GENWQE_INJECT_BUS_RESET_FAILURE 0x00000002 /* pci_bus_reset fail */
+#define GENWQE_INJECT_GFIR_FATAL 0x00000004 /* GFIR = 0x0000ffff */
+#define GENWQE_INJECT_GFIR_INFO 0x00000008 /* GFIR = 0xffff0000 */
+
+/**
+ * Genwqe card description and management data.
+ *
+ * Error-handling in case of card malfunction
+ * ------------------------------------------
+ *
+ * If the card is detected to be defective the outside environment
+ * will cause the PCI layer to call deinit (the cleanup function for
+ * probe). This is the same effect like doing a unbind/bind operation
+ * on the card.
+ *
+ * The genwqe card driver implements a health checking thread which
+ * verifies the card function. If this detects a problem the cards
+ * device is being shutdown and restarted again, along with a reset of
+ * the card and queue.
+ *
+ * All functions accessing the card device return either EIO or ENODEV
+ * code to indicate the malfunction to the user. The user has to close
+ * the filedestriptor and open a new one, once the card becomes
+ * available again.
+ *
+ * If the open filedescriptor is setup to receive SIGIO, the signal is
+ * genereated for the application which has to provide a handler to
+ * react on it. If the application does not close the open
+ * filedescriptors a SIGKILL is send to enforce freeing the cards
+ * resources.
+ *
+ * I did not find a different way to prevent kernel problems due to
+ * reference counters for the cards character devices getting out of
+ * sync. The character device deallocation does not block, even if
+ * there is still an open filedescriptor pending. If this pending
+ * descriptor is closed, the data structures used by the character
+ * device is reinstantiated, which will lead to the reference counter
+ * dropping below the allowed values.
+ *
+ * Card recovery
+ * -------------
+ *
+ * To test the internal driver recovery the following command can be used:
+ * sudo sh -c 'echo 0xfffff > /sys/class/genwqe/genwqe0_card/err_inject'
+ */
+
+
+/**
+ * To avoid memcpying data arround we use user memory directly. To do
+ * this we need to pin/swap-in the memory and request a DMA address
+ * for it.
+ */
+enum dma_mapping_type {
+ GENWQE_MAPPING_RAW = 0, /**< contignous memory buffer */
+ GENWQE_MAPPING_SGL_TEMP, /**< sglist dynamically used */
+ GENWQE_MAPPING_SGL_PINNED, /**< sglist used with pinning */
+};
+
+struct dma_mapping {
+ enum dma_mapping_type type;
+
+ void *u_vaddr; /**< user-space vaddr/non-aligned */
+ void *k_vaddr; /**< kernel-space vaddr/non-aligned */
+ dma_addr_t dma_addr; /**< physical DMA address */
+
+ struct page **page_list; /**< list of pages used by user buff */
+ dma_addr_t *dma_list; /**< list of dma addresses per page */
+ unsigned int nr_pages; /**< number of pages */
+ unsigned int size; /**< size in bytes */
+
+ struct list_head card_list; /**< list of usr_maps for card */
+ struct list_head pin_list; /**< list of pinned memory for dev */
+};
+
+static inline void genwqe_mapping_init(struct dma_mapping *m,
+ enum dma_mapping_type type)
+{
+ memset(m, 0, sizeof(*m));
+ m->type = type;
+}
+
+struct ddcb_queue {
+ const char *name;
+
+ /** service layer: device driver control blocks (DDCB) */
+ int ddcb_max; /**< amount of DDCBs */
+ int ddcb_next; /**< next available DDCB num */
+ int ddcb_act; /**< DDCB to be processed */
+ u16 ddcb_seq; /**< slc seq num */
+ unsigned int ddcbs_in_flight; /**< number of ddcbs in processing */
+ unsigned int ddcbs_completed;
+ unsigned int ddcbs_max_in_flight;
+ unsigned int busy; /**< how many times -EBUSY? */
+
+ dma_addr_t ddcb_daddr; /**< DMA address */
+ struct ddcb __iomem *ddcb_vaddr;
+ struct ddcb_requ **ddcb_req; /**< ddcb processing parameter */
+ wait_queue_head_t *ddcb_waitqs; /**< waitqueue per ddcb */
+
+ spinlock_t ddcb_lock; /**< exclusive access to queue */
+ wait_queue_head_t ddcb_waitq; /**< for ddcb processing */
+ void *ddcb_attr; /**< sysfs attr. block */
+
+ /* registers or the respective queue to be used */
+ u32 IO_QUEUE_CONFIG;
+ u32 IO_QUEUE_STATUS;
+ u32 IO_QUEUE_SEGMENT;
+ u32 IO_QUEUE_INITSQN;
+ u32 IO_QUEUE_WRAP;
+ u32 IO_QUEUE_OFFSET;
+ u32 IO_QUEUE_WTIME;
+ u32 IO_QUEUE_ERRCNTS;
+ u32 IO_QUEUE_LRW;
+};
+
+/**
+ * GFIR, SLU_UNITCFG, APP_UNITCFG
+ * 8 Units with FIR/FEC + 64 * 2ndary FIRS/FEC.
+ */
+#define GENWQE_FFDC_REGS (3 + (8 * (2 + 2 * 64)))
+
+struct genwqe_ffdc {
+ unsigned int entries;
+ struct genwqe_reg *regs;
+};
+
+struct genwqe_dev {
+ enum genwqe_card_state card_state;
+ spinlock_t print_lock;
+
+ int card_idx; /**< card index 0..CARD_NO_MAX-1 */
+ u64 flags; /**< general flags */
+
+ /* FFDC data gathering */
+ struct genwqe_ffdc ffdc[GENWQE_DBG_UNITS];
+
+ /* DDCB workqueue */
+ struct task_struct *card_thread;
+ wait_queue_head_t queue_waitq;
+ struct ddcb_queue queue; /**< genwqe DDCB queue */
+ unsigned int irqs_processed;
+
+ /* Card health checking thread */
+ struct task_struct *health_thread;
+ wait_queue_head_t health_waitq;
+
+ /* char device */
+ dev_t devnum_genwqe; /**< major/minor num card */
+ struct class *class_genwqe; /**< reference to class object */
+ struct device *dev; /**< for device creation */
+ struct cdev cdev_genwqe; /**< char device for card */
+
+ /* pci resources */
+ struct pci_dev *pci_dev; /**< PCI device */
+ void __iomem *mmio; /**< BAR-0 MMIO start */
+ unsigned long mmio_len;
+ u16 num_vfs;
+ int is_privileged; /**< access to all regs possible */
+
+ /* config regs which we need often */
+ u64 slu_unitcfg;
+ u64 app_unitcfg;
+ u64 softreset;
+ u64 err_inject;
+ u64 last_gfir;
+ char app_name[5];
+
+ spinlock_t file_lock; /**< lock for open files */
+ struct list_head file_list; /**< list of open files */
+
+ int co_devices; /**< number of platform devices */
+ struct platform_device *co_dev[GENWQE_MAX_DEVICES];
+};
+
+/** kernel internal representation of the DDCB request */
+struct ddcb_requ {
+ /* kernel specific content */
+ enum genwqe_requ_state req_state; /**< request status */
+ int num; /**< ddcb_no for this request */
+ struct ddcb_queue *queue; /**< associated queue */
+
+ struct dma_mapping dma_mappings[DDCB_FIXUPS];
+ struct sg_entry *sgl[DDCB_FIXUPS];
+ dma_addr_t sgl_dma_addr[DDCB_FIXUPS];
+ size_t sgl_size[DDCB_FIXUPS];
+
+ /* kernel/user shared content */
+ struct genwqe_ddcb_cmd cmd; /**< ddcb_no for this request */
+ struct genwqe_debug_data debug_data;
+};
+
+static inline enum genwqe_requ_state ddcb_requ_get_state(struct ddcb_requ *req)
+{
+ return req->req_state;
+}
+
+static inline void ddcb_requ_set_state(struct ddcb_requ *req,
+ enum genwqe_requ_state new_state)
+{
+ req->req_state = new_state;
+}
+
+int ddcb_requ_finished(struct genwqe_dev *cd, struct ddcb_requ *req);
+
+static inline int ddcb_requ_collect_debug_data(struct ddcb_requ *req)
+{
+ return (req->cmd.debug_data != NULL);
+}
+
+/** This data structure exists during genwqe_card file descriptor's lifetime */
+struct genwqe_file {
+ struct genwqe_dev *cd;
+ struct genwqe_driver *client;
+ struct file *filp;
+
+ struct fasync_struct *async_queue;
+ struct task_struct *owner;
+ struct list_head list; /**< entry in list of open files */
+
+ spinlock_t map_lock; /**< lock for dma_mappings */
+ struct list_head map_list; /**< list of dma_mappings */
+
+ spinlock_t pin_lock; /**< lock for pinned memory */
+ struct list_head pin_list; /**< list of pinned memory */
+};
+
+int genwqe_setup_service_layer(struct genwqe_dev *cd); /**< for PF only */
+int genwqe_finish_queue(struct genwqe_dev *cd);
+int genwqe_release_service_layer(struct genwqe_dev *cd);
+
+/**
+ * @brief evaluate id of Service Layer Unit
+ * 0x00 : Development mode. / Genwqe4-WFO (defunct)
+ * 0x01 : SLC1 (a5-wfo)
+ * 0x02 : SLC2 (sept2012) zcomp, zdb2, single DDCB,
+ * 0x03 : SLC2 (feb2013, zcomp, zdb2, generic driver,
+ */
+static inline int genwqe_get_slu_id(struct genwqe_dev *cd)
+{
+ return (int)((cd->slu_unitcfg >> 32) & 0xff);
+}
+
+int genwqe_check_ddcb_queue(struct genwqe_dev *cd, struct ddcb_queue *queue);
+int genwqe_next_ddcb_ready(struct genwqe_dev *cd);
+int genwqe_ddcbs_in_flight(struct genwqe_dev *cd);
+
+u8 genwqe_card_type(struct genwqe_dev *cd);
+int genwqe_card_reset(struct genwqe_dev *cd);
+int genwqe_set_interrupt_capability(struct genwqe_dev *cd, int count);
+void genwqe_reset_interrupt_capability(struct genwqe_dev *cd);
+
+int genwqe_device_create(struct genwqe_dev *cd);
+int genwqe_device_remove(struct genwqe_dev *cd);
+
+int genwqe_enable_sriov(struct genwqe_dev *cd);
+int genwqe_disable_sriov(struct genwqe_dev *cd);
+
+int create_card_sysfs(struct genwqe_dev *cd);
+void remove_card_sysfs(struct genwqe_dev *cd);
+
+int genwqe_read_softreset(struct genwqe_dev *cd);
+
+/* Hardware Circumventions */
+int genwqe_recovery_on_fatal_gfir_required(struct genwqe_dev *cd);
+int genwqe_flash_readback_fails(struct genwqe_dev *cd);
+
+/**
+ * @param [in] cd genwqe device
+ * @param [in] func 0: PF, 1: VF0, ..., 15: VF14
+ */
+int genwqe_write_jtimer(struct genwqe_dev *cd, int func, u64 val);
+
+/**
+ * @param [in] cd genwqe device
+ * @param [in] func 0: PF, 1: VF0, ..., 15: VF14
+ */
+u64 genwqe_read_jtimer(struct genwqe_dev *cd, int func);
+
+/* FFDC Buffer Management */
+int genwqe_ffdc_buff_size(struct genwqe_dev *cd, int unit_id);
+int genwqe_ffdc_buff_read(struct genwqe_dev *cd, int unit_id,
+ struct genwqe_reg *regs, unsigned int max_regs);
+int genwqe_read_ffdc_regs(struct genwqe_dev *cd, struct genwqe_reg *regs,
+ unsigned int max_regs, int all);
+int genwqe_ffdc_dump_dma(struct genwqe_dev *cd,
+ struct genwqe_reg *regs, unsigned int max_regs);
+
+int genwqe_print_ffdc(struct genwqe_dev *cd);
+
+int genwqe_init_debug_data(struct genwqe_dev *cd,
+ struct genwqe_debug_data *d);
+
+void init_crc32(void);
+int genwqe_read_app_id(struct genwqe_dev *cd, char *app_name, int len);
+
+/**< memory allocation/deallocation; dma address handling */
+int user_vmap(struct genwqe_dev *cd, struct dma_mapping *m,
+ void *uaddr, unsigned long size,
+ struct ddcb_requ *req);
+
+int user_vunmap(struct genwqe_dev *cd, struct dma_mapping *m,
+ struct ddcb_requ *req);
+
+
+struct sg_entry *genwqe_alloc_sgl(struct genwqe_dev *cd, int num_pages,
+ dma_addr_t *dma_addr, size_t *sgl_size);
+
+void genwqe_free_sgl(struct genwqe_dev *cd, struct sg_entry *sg_list,
+ dma_addr_t dma_addr, size_t size);
+
+int genwqe_setup_sgl(struct genwqe_dev *cd,
+ unsigned long offs,
+ unsigned long size,
+ struct sg_entry *sgl, /* genwqe sgl */
+ dma_addr_t dma_addr, size_t sgl_size,
+ dma_addr_t *dma_list, int page_offs, int num_pages);
+
+int genwqe_check_sgl(struct genwqe_dev *cd, struct sg_entry *sg_list,
+ int size);
+
+static inline int dma_mapping_used(struct dma_mapping *m)
+{
+ if (!m)
+ return 0;
+ return (m->size != 0);
+}
+
+/**
+ * This function will do the address translation changes to the DDCBs
+ * according to the definitions required by the ATS field. It looks up
+ * the memory allocation buffer or does vmap/vunmap for the respective
+ * user-space buffers, inclusive page pinning and scatter gather list
+ * buildup and teardown.
+ */
+int __genwqe_execute_ddcb(struct genwqe_dev *cd,
+ struct genwqe_ddcb_cmd *cmd);
+
+/**
+ * This version will not do address translation or any modifcation of
+ * the DDCB data. It is used e.g. for the MoveFlash DDCB which is
+ * entirely prepared by the driver itself. That means the appropriate
+ * DMA addresses are already in the DDCB and do not need any
+ * modification.
+ */
+int __genwqe_execute_raw_ddcb(struct genwqe_dev *cd,
+ struct genwqe_ddcb_cmd *cmd);
+
+int __genwqe_enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req);
+int __genwqe_wait_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req);
+int __genwqe_purge_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req);
+
+/** register access */
+int __genwqe_writeq(struct genwqe_dev *cd, u64 byte_offs, u64 val);
+u64 __genwqe_readq(struct genwqe_dev *cd, u64 byte_offs);
+int __genwqe_writel(struct genwqe_dev *cd, u64 byte_offs, u32 val);
+u32 __genwqe_readl(struct genwqe_dev *cd, u64 byte_offs);
+
+void *__genwqe_alloc_consistent(struct genwqe_dev *cd, size_t size,
+ dma_addr_t *dma_handle);
+void __genwqe_free_consistent(struct genwqe_dev *cd, size_t size,
+ void *vaddr, dma_addr_t dma_handle);
+
+/** base clock frequency in MHz */
+int genwqe_base_clock_frequency(struct genwqe_dev *cd);
+
+/** before FFDC is captured the traps should be stopped. */
+void genwqe_stop_traps(struct genwqe_dev *cd);
+void genwqe_start_traps(struct genwqe_dev *cd);
+
+/* Hardware circumvention */
+int genwqe_need_err_masking(struct genwqe_dev *cd);
+
+/**
+ * On Intel with SRIOV support we see:
+ * PF: is_physfn = 1 is_virtfn = 0
+ * VF: is_physfn = 0 is_virtfn = 1
+ *
+ * On Systems with no SRIOV support _and_ virtualized systems we get:
+ * is_physfn = 0 is_virtfn = 0
+ *
+ * Other vendors have individual pci device ids to distinguish between
+ * virtual function drivers and physical function drivers. GenWQE
+ * unfortunately has just on pci device id for both, VFs and PF.
+ *
+ * The following code is used to distinguish if the card is running in
+ * privileged mode, either as true PF or in a virtualized system with
+ * full register access e.g. currently on PowerPC.
+ *
+ * if (pci_dev->is_virtfn)
+ * cd->is_privileged = 0;
+ * else
+ * cd->is_privileged = (__genwqe_readq(cd, IO_SLU_BITSTREAM)
+ * != IO_ILLEGAL_VALUE);
+ */
+static inline int genwqe_is_privileged(struct genwqe_dev *cd)
+{
+ return cd->is_privileged;
+}
+
+#endif /* __CARD_BASE_H__ */
diff --git a/drivers/misc/genwqe/card_ddcb.c b/drivers/misc/genwqe/card_ddcb.c
new file mode 100644
index 0000000..66ba23f
--- /dev/null
+++ b/drivers/misc/genwqe/card_ddcb.c
@@ -0,0 +1,1377 @@
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Device Driver Control Block (DDCB) queue support. Definition of
+ * interrupt handlers for queue support as well as triggering the
+ * health monitor code in case of problems. The current hardware uses
+ * an MSI interrupt which is shared between error handling and
+ * functional code.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/crc-itu-t.h>
+
+#include "card_ddcb.h"
+
+/****************************************************************************/
+/** Service Layer Helpers */
+/****************************************************************************/
+
+/**
+ * N: next DDCB, this is where the next DDCB will be put.
+ * A: active DDCB, this is where the code will look for the next completion.
+ * x: DDCB is enqueued, we are waiting for its completion.
+
+ * Situation (1): Empty queue
+ * +---+---+---+---+---+---+---+---+
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+ * | | | | | | | | |
+ * +---+---+---+---+---+---+---+---+
+ * A/N
+ * enqueued_ddcbs = A - N = 2 - 2 = 0
+ *
+ * Situation (2): Wrapped, N > A
+ * +---+---+---+---+---+---+---+---+
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+ * | | | x | x | | | | |
+ * +---+---+---+---+---+---+---+---+
+ * A N
+ * enqueued_ddcbs = N - A = 4 - 2 = 2
+ *
+ * Situation (3): Queue wrapped, A > N
+ * +---+---+---+---+---+---+---+---+
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+ * | x | x | | | x | x | x | x |
+ * +---+---+---+---+---+---+---+---+
+ * N A
+ * enqueued_ddcbs = queue_max - (A - N) = 8 - (4 - 2) = 6
+ *
+ * Situation (4a): Queue full N > A
+ * +---+---+---+---+---+---+---+---+
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+ * | x | x | x | x | x | x | x | |
+ * +---+---+---+---+---+---+---+---+
+ * A N
+ *
+ * enqueued_ddcbs = N - A = 7 - 0 = 7
+ *
+ * Situation (4a): Queue full A > N
+ * +---+---+---+---+---+---+---+---+
+ * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
+ * | x | x | x | | x | x | x | x |
+ * +---+---+---+---+---+---+---+---+
+ * N A
+ * enqueued_ddcbs = queue_max - (A - N) = 8 - (4 - 3) = 7
+ */
+
+int queue_empty(struct ddcb_queue *queue)
+{
+ return (queue->ddcb_next == queue->ddcb_act);
+}
+
+int queue_enqueued_ddcbs(struct ddcb_queue *queue)
+{
+ if (queue->ddcb_next >= queue->ddcb_act)
+ return queue->ddcb_next - queue->ddcb_act;
+
+ return queue->ddcb_max - (queue->ddcb_act - queue->ddcb_next);
+}
+
+int queue_free_ddcbs(struct ddcb_queue *queue)
+{
+ int free_ddcbs = queue->ddcb_max - queue_enqueued_ddcbs(queue) - 1;
+
+ if (free_ddcbs < 0) { /* must never ever happen! */
+ return 0;
+ }
+ return free_ddcbs;
+}
+
+/**
+ * Use of the PRIV field in the DDCB for queue debugging:
+ *
+ * (1) Trying to get rid of a DDCB which saw a timeout:
+ * pddcb->priv[6] = 0xcc; # cleared
+ *
+ * (2) Append a DDCB via NEXT bit:
+ * pddcb->priv[7] = 0xaa; # appended
+ *
+ * (3) DDCB needed tapping:
+ * pddcb->priv[7] = 0xbb; # tapped
+ *
+ * (4) DDCB marked as correctly finished:
+ * pddcb->priv[6] = 0xff; # finished
+ */
+
+static inline void ddcb_mark_tapped(struct ddcb *pddcb)
+{
+ pddcb->priv[7] = 0xbb; /* tapped */
+}
+
+static inline void ddcb_mark_appended(struct ddcb *pddcb)
+{
+ pddcb->priv[7] = 0xaa; /* appended */
+}
+
+static inline void ddcb_mark_cleared(struct ddcb *pddcb)
+{
+ pddcb->priv[6] = 0xcc; /* cleared */
+}
+
+static inline void ddcb_mark_finished(struct ddcb *pddcb)
+{
+ pddcb->priv[6] = 0xff; /* finished */
+}
+
+static inline void ddcb_mark_unused(struct ddcb *pddcb)
+{
+ pddcb->priv_64 = cpu_to_be64(0); /* not tapped */
+}
+
+/**
+ * @brief Generate 16-bit crc as required for DDCBs
+ * polynomial = x^16 + x^12 + x^5 + 1 (0x1021)
+ * - example:
+ * 4 bytes 0x01 0x02 0x03 0x04 with init = 0xffff
+ * should result in a crc16 of 0x89c3
+ *
+ * @param buff pointer to data buffer
+ * @param len length of data for calculation
+ * @param init initial crc (0xffff at start)
+ *
+ * @return crc16 checksum in big endian format !
+ */
+static inline u16 genwqe_crc16(const u8 *buff, size_t len, u16 init)
+{
+ return crc_itu_t(init, buff, len);
+}
+
+/****************************************************************************/
+/** Service Layer Functions */
+/****************************************************************************/
+
+static void print_ddcb_info(struct genwqe_dev *cd, struct ddcb_queue *queue)
+{
+ int i;
+ struct ddcb *pddcb;
+ unsigned long flags;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ spin_lock_irqsave(&cd->print_lock, flags);
+
+ dev_info(&pci_dev->dev,
+ "DDCB list for card #%d (ddcb_act=%d / ddcb_next=%d):\n",
+ cd->card_idx, queue->ddcb_act, queue->ddcb_next);
+
+ pddcb = queue->ddcb_vaddr;
+ for (i = 0; i < queue->ddcb_max; i++) {
+ dev_err(&pci_dev->dev,
+ " %c %-3d: RETC=%03x SEQ=%04x "
+ "HSI=%02X SHI=%02x PRIV=%06llx CMD=%03x\n",
+ i == queue->ddcb_act ? '>' : ' ',
+ i,
+ be16_to_cpu(pddcb->retc_16),
+ be16_to_cpu(pddcb->seqnum_16),
+ pddcb->hsi,
+ pddcb->shi,
+ be64_to_cpu(pddcb->priv_64),
+ pddcb->cmd);
+ pddcb++;
+ }
+ spin_unlock_irqrestore(&cd->print_lock, flags);
+}
+
+struct genwqe_ddcb_cmd *ddcb_requ_alloc(void)
+{
+ struct ddcb_requ *req;
+
+ req = kzalloc(sizeof(*req), GFP_ATOMIC);
+ if (!req)
+ return NULL;
+
+ return &req->cmd;
+}
+
+void ddcb_requ_free(struct genwqe_ddcb_cmd *cmd)
+{
+ struct ddcb_requ *req = container_of(cmd, struct ddcb_requ, cmd);
+ kfree(req);
+}
+
+/**
+ * @brief Returns the hardware state of the associated DDCB. The
+ * status of ddcb_requ mirrors this hardware state, but is
+ * copied in the ddcb_requ on interrupt/polling function.
+ * The lowlevel code should check the hardware state directly,
+ * the higher level code should check the copy.
+ *
+ * This function will also return true if the state of
+ * the queue is not GENWQE_CARD_USED. This enables us to
+ * purge all DDCBs in the shutdown case.
+ *
+ * @param cd
+ * @param req
+ */
+int ddcb_requ_finished(struct genwqe_dev *cd, struct ddcb_requ *req)
+{
+ return ((ddcb_requ_get_state(req) == GENWQE_REQU_FINISHED) ||
+ (cd->card_state != GENWQE_CARD_USED));
+}
+
+/**
+ * @brief Start execution of DDCB by tapping or append to queue
+ * via NEXT bit. This is done by an atomic 'compare and swap'
+ * instruction and checking SHI and HSI of the previous DDCB.
+ * @important This function must only be called with ddcb_lock held!
+ *
+ * @param cd pointer to genwqe device descriptor
+ * @param queue queue this operation should be done on
+ * @param ddcb_no pointer to ddcb number being tapped
+ *
+ * @return 0 if simulated tapping
+ * 1 if new DDCB is appended to previous
+ * 2 if DDCB queue is tapped via register/simulation
+ */
+static int enqueue_ddcb(struct genwqe_dev *cd,
+ struct ddcb_queue *queue,
+ struct ddcb *pddcb, int ddcb_no)
+{
+ unsigned int try;
+ int prev_no;
+ struct ddcb *prev_ddcb;
+ u32 old, new, icrc_hsi_shi;
+ u64 num;
+
+ /**
+ * For performance checks a Dispatch Timestamp can be put into
+ * DDCB It is supposed to use the SLU's free running counter,
+ * but this requires PCIe cycles.
+ */
+ ddcb_mark_unused(pddcb);
+
+ /* check previous DDCB if already fetched */
+ prev_no = (ddcb_no == 0) ? queue->ddcb_max - 1 : ddcb_no - 1;
+ prev_ddcb = &queue->ddcb_vaddr[prev_no];
+
+ /**
+ * It might have happened that the HSI.FETCHED bit is
+ * set. Retry in this case. Therefore I expect maximum 2 times
+ * trying.
+ */
+ ddcb_mark_appended(pddcb);
+ for (try = 0; try < 2; try++) {
+ old = prev_ddcb->icrc_hsi_shi_32; /* read SHI/HSI in BE32 */
+
+ /* try to append via NEXT bit if prev DDCB is not completed */
+ if ((old & DDCB_COMPLETED_BE32) != 0x00000000)
+ break;
+
+ new = (old | DDCB_NEXT_BE32);
+ icrc_hsi_shi = cmpxchg(&prev_ddcb->icrc_hsi_shi_32, old, new);
+
+ if (icrc_hsi_shi == old)
+ return 1; /* append to existing queue */
+ else
+ continue;
+ }
+
+ /* Queue must be re-started by updating QUEUE_OFFSET */
+ ddcb_mark_tapped(pddcb);
+ num = (u64)ddcb_no << 8;
+ __genwqe_writeq(cd, queue->IO_QUEUE_OFFSET, num); /* start queue */
+ return 2;
+}
+
+/**
+ * @brief Waits until DDCB is completed
+ * The Service Layer will update the RETC in DDCB when
+ * processing is pending or done.
+ *
+ * @param cd [in] pointer to genwqe device descriptor
+ * @param req [inout] pointer to requsted DDCB parameters
+ *
+ * @return >0 remaining jiffies, DDCB completed
+ * -ETIMEDOUT when timeout
+ * -ERESTARTSYS when ^C
+ * -EINVAL when unknown error condition
+ *
+ * When an error is returned the called needs to ensure that
+ * purge_ddcb() is being called to get the &req removed from the
+ * queue. If this is not done, and req is e.g. temporarilly allocated
+ * on the stack, problems will occur.
+ */
+int __genwqe_wait_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req)
+{
+ int rc;
+ unsigned int ddcb_no;
+ struct ddcb_queue *queue;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (req == NULL)
+ return -EINVAL;
+
+ queue = req->queue;
+ if (queue == NULL)
+ return -EINVAL;
+
+ ddcb_no = req->num;
+ if (ddcb_no >= queue->ddcb_max)
+ return -EINVAL;
+
+ rc = wait_event_interruptible_timeout(queue->ddcb_waitqs[ddcb_no],
+ ddcb_requ_finished(cd, req),
+ genwqe_ddcb_software_timeout * HZ);
+
+ /* We need to distinguish 3 cases here:
+ * 1. rc == 0 timeout occured
+ * 2. rc == -ERESTARTSYS signal received
+ * 3. rc > 0 remaining jiffies condition is true
+ */
+ if (rc == 0) {
+ struct ddcb_queue *queue = req->queue;
+
+ /**
+ * Timeout may be caused by long task switching of PCI
+ * Support partition. When timeout happens, check if
+ * the request has meanwhile completed. See ODT ticket
+ * B3215
+ */
+ genwqe_check_ddcb_queue(cd, req->queue);
+ if (ddcb_requ_finished(cd, req))
+ return rc;
+
+ dev_err(&pci_dev->dev,
+ "[%s] err: DDCB#%d timeout rc=%d state=%d req @ %p\n",
+ __func__, req->num, rc, ddcb_requ_get_state(req),
+ req);
+ dev_err(&pci_dev->dev,
+ "[%s] IO_QUEUE_STATUS=0x%016llx\n", __func__,
+ __genwqe_readq(cd, queue->IO_QUEUE_STATUS));
+
+ if (genwqe_debug & dbg_card_ddcb) {
+ struct ddcb *pddcb = &queue->ddcb_vaddr[req->num];
+ genwqe_hexdump(pci_dev, pddcb, sizeof(*pddcb));
+ }
+ print_ddcb_info(cd, req->queue);
+ return -ETIMEDOUT;
+
+ } else if (rc == -ERESTARTSYS) {
+ return rc; /* -EINTR; rc; */
+ /** EINTR: Stops the application */
+ /** ERESTARTSYS: Restartable systemcall; called again */
+
+ } else if (rc < 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: DDCB#%d unknown result (rc=%d) %d!\n",
+ __func__, req->num, rc, ddcb_requ_get_state(req));
+ return -EINVAL;
+ }
+
+ /* Severe error occured. Driver is forced to stop operation */
+ if (cd->card_state != GENWQE_CARD_USED) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: DDCB#%d forced to stop (rc=%d)\n",
+ __func__, req->num, rc);
+ return -EIO;
+ }
+ return rc;
+}
+
+/**
+ * @brief Get next available DDCB
+ * DDCB's content is completely cleared but presets for
+ * PRE and SEQNUM.
+ * @important This function must only be called when ddcb_lock is held!
+ *
+ * @param cd pointer to genwqe device descriptor.
+ * @return NULL if no empty DDCB available otherwise ptr to next DDCB.
+ */
+static struct ddcb *get_next_ddcb(struct genwqe_dev *cd,
+ struct ddcb_queue *queue,
+ int *num)
+{
+ u64 *pu64;
+ struct ddcb *pddcb;
+
+ if (queue_free_ddcbs(queue) == 0) /* queue is full */
+ return NULL;
+
+ /* find new ddcb */
+ pddcb = &queue->ddcb_vaddr[queue->ddcb_next];
+
+ /* if it is not completed, we are not allowed to use it */
+ /* barrier(); */
+ if ((pddcb->icrc_hsi_shi_32 & DDCB_COMPLETED_BE32) == 0x00000000)
+ return NULL;
+
+ *num = queue->ddcb_next; /* internal DDCB number */
+ queue->ddcb_next = (queue->ddcb_next + 1) % queue->ddcb_max;
+
+ /* clear important DDCB fields */
+ pu64 = (u64 *)pddcb;
+ pu64[0] = 0ULL; /* offs 0x00 (ICRC,HSI,SHI,...) */
+ pu64[1] = 0ULL; /* offs 0x01 (ACFUNC,CMD...) */
+
+ /* destroy previous results in ASV */
+ pu64[0x80/8] = 0ULL; /* offs 0x80 (ASV + 0) */
+ pu64[0x88/8] = 0ULL; /* offs 0x88 (ASV + 0x08) */
+ pu64[0x90/8] = 0ULL; /* offs 0x90 (ASV + 0x10) */
+ pu64[0x98/8] = 0ULL; /* offs 0x98 (ASV + 0x18) */
+ pu64[0xd0/8] = 0ULL; /* offs 0xd0 (RETC,ATTN...) */
+
+ pddcb->pre = DDCB_PRESET_PRE; /* 128 */
+ pddcb->seqnum_16 = cpu_to_be16(queue->ddcb_seq++);
+ return pddcb;
+}
+
+/**
+ * @brief Copy all output state from the real DDCB to the
+ * request data structure.
+ * This is needed by:
+ * - genwqe_purge_ddcb();
+ * - genwqe_check_ddcb_queue();
+ */
+static void copy_ddcb_results(struct ddcb_requ *req, int ddcb_no)
+{
+ struct ddcb_queue *queue = req->queue;
+ struct ddcb *pddcb = &queue->ddcb_vaddr[req->num];
+
+ /* copy DDCB ASV to request struct */
+ /* there is no endian conversion made, since data structure */
+ /* in ASV is still unknown here */
+ memcpy(&req->cmd.asv[0], &pddcb->asv[0], DDCB_ASV_LENGTH);
+
+ /* copy status flags of the variant part */
+ req->cmd.vcrc = be16_to_cpu(pddcb->vcrc_16);
+ req->cmd.deque_ts = be64_to_cpu(pddcb->deque_ts_64);
+ req->cmd.cmplt_ts = be64_to_cpu(pddcb->cmplt_ts_64);
+
+ req->cmd.attn = be16_to_cpu(pddcb->attn_16);
+ req->cmd.progress = be32_to_cpu(pddcb->progress_32);
+ req->cmd.retc = be16_to_cpu(pddcb->retc_16);
+
+ if (ddcb_requ_collect_debug_data(req)) {
+ int prev_no = (ddcb_no == 0) ?
+ queue->ddcb_max - 1 : ddcb_no - 1;
+ struct ddcb *prev_pddcb = &queue->ddcb_vaddr[prev_no];
+
+ memcpy(&req->debug_data.ddcb_finished, pddcb,
+ sizeof(req->debug_data.ddcb_finished));
+ memcpy(&req->debug_data.ddcb_prev, prev_pddcb,
+ sizeof(req->debug_data.ddcb_prev));
+ }
+}
+
+/**
+ * @brief Remove a DDCB from the workqueue. This will fail when the
+ * request was already FETCHED. In this case we need to wait
+ * until it is finished. Else the DDCB can be reused. This
+ * function also ensures that the request data structure is
+ * removed from ddcb_req[].
+ *
+ * @note Please do not forget to call this function when
+ * genwqe_wait_ddcb() fails, such that the request gets really
+ * removed from ddcb_req[].
+ *
+ * @param cd genwqe device descriptor
+ * @param req ddcb request
+ *
+ * @return 0 if success
+ */
+int __genwqe_purge_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req)
+{
+ struct ddcb *pddcb = NULL;
+ unsigned int t;
+ unsigned long flags;
+ struct ddcb_queue *queue = req->queue;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ u32 icrc_hsi_shi = 0x0000;
+ u64 queue_status;
+ u32 old, new;
+
+ /* unsigned long flags; */
+ if (genwqe_ddcb_software_timeout <= 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: software timeout is not set!\n", __func__);
+ return -EFAULT;
+ }
+
+ pddcb = &queue->ddcb_vaddr[req->num];
+
+ for (t = 0; t < genwqe_ddcb_software_timeout * 10; t++) {
+
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+
+ /* Check if req was meanwhile finished */
+ if (ddcb_requ_get_state(req) == GENWQE_REQU_FINISHED)
+ goto go_home;
+
+ /* try to set PURGE bit if FETCHED/COMPLETED are not set */
+ old = pddcb->icrc_hsi_shi_32; /* read SHI/HSI in BE32 */
+ if ((old & DDCB_FETCHED_BE32) == 0x00000000) {
+
+ new = (old | DDCB_PURGE_BE32);
+ icrc_hsi_shi = cmpxchg(&pddcb->icrc_hsi_shi_32,
+ old, new);
+ if (icrc_hsi_shi == old)
+ goto finish_ddcb;
+ }
+
+ /* normal finish with HSI bit */
+ barrier();
+ icrc_hsi_shi = pddcb->icrc_hsi_shi_32;
+ if (icrc_hsi_shi & DDCB_COMPLETED_BE32)
+ goto finish_ddcb;
+
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+
+ /* NOTE: Here the check_ddcb() function will most
+ likely discover this DDCB to be finished some point
+ in time. It will mark the req finished and free it
+ up in the list. */
+
+ copy_ddcb_results(req, req->num); /* for the failing case */
+ msleep(1000/10); /* sleep for 1/10 second and try again */
+ continue;
+
+finish_ddcb:
+ copy_ddcb_results(req, req->num);
+ ddcb_requ_set_state(req, GENWQE_REQU_FINISHED);
+ queue->ddcbs_in_flight--;
+ queue->ddcb_req[req->num] = NULL; /* delete from array */
+ ddcb_mark_cleared(pddcb);
+
+ /* Move active DDCB further; Nothing to do here anymore. */
+
+ /**
+ * We need to ensure that there is at least one free
+ * DDCB in the queue. To do that, we must update
+ * ddcb_act only if the COMPLETED bit is set for the
+ * DDCB we are working on else we treat that DDCB even
+ * if we PURGED it as occupied (hardware is supposed
+ * to set the COMPLETED bit yet!).
+ */
+ icrc_hsi_shi = pddcb->icrc_hsi_shi_32;
+ if ((icrc_hsi_shi & DDCB_COMPLETED_BE32) &&
+ (queue->ddcb_act == req->num)) {
+ queue->ddcb_act = ((queue->ddcb_act + 1) %
+ queue->ddcb_max);
+ }
+go_home:
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ return 0;
+ }
+
+ /* FIXME If the card is dead and the queue is forced to stop
+ we might see this in the queue status register; check with
+ hardware designers */
+ queue_status = __genwqe_readq(cd, queue->IO_QUEUE_STATUS);
+
+ if (genwqe_debug & dbg_card_ddcb) {
+ dbg_printk(cd, dbg_card_ddcb, "UN/FINISHED DDCB#%d\n",
+ req->num);
+ genwqe_hexdump(pci_dev, pddcb, sizeof(*pddcb));
+ }
+ dev_err(&pci_dev->dev,
+ "[%s] err: DDCB#%d not purged and not completed "
+ "after %d seconds QSTAT=%016llx!!\n",
+ __func__, req->num, genwqe_ddcb_software_timeout,
+ queue_status);
+
+ print_ddcb_info(cd, req->queue);
+
+ return -EFAULT;
+}
+
+int genwqe_init_debug_data(struct genwqe_dev *cd, struct genwqe_debug_data *d)
+{
+ int len;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (d == NULL) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: invalid memory for debug data!\n",
+ __func__);
+ return -EFAULT;
+ }
+
+ len = sizeof(d->driver_version);
+ snprintf(d->driver_version, len - 1, "%s", DRV_VERS_STRING);
+ d->driver_version[len - 1] = 0;
+ d->slu_unitcfg = cd->slu_unitcfg;
+ d->app_unitcfg = cd->app_unitcfg;
+ return 0;
+}
+
+/**
+ * @brief client interface
+ * append new DDCB to queue list
+ *
+ * @param cd pointer to genwqe device descriptor
+ * @param req pointer to requsted DDCB parameters
+ *
+ * @return 0 if enqueuing succeeded
+ * -EIO if card is unusable/PCIe problems
+ * -EBUSY if enqueuing failed
+ */
+int __genwqe_enqueue_ddcb(struct genwqe_dev *cd, struct ddcb_requ *req)
+{
+ struct ddcb *pddcb;
+ unsigned long flags;
+ struct ddcb_queue *queue;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ u16 icrc;
+
+ if (cd->card_state != GENWQE_CARD_USED) {
+ static int count;
+
+ if (count++ < 20)
+ dev_err(&pci_dev->dev,
+ "[%s] Card is unusable/PCIe problem Req#%d\n",
+ __func__, req->num);
+
+ return -EIO;
+ }
+
+ queue = req->queue = &cd->queue;
+
+ /* FIXME circumvention to improve performance when no irq is
+ * there.
+ */
+ if (genwqe_polling_enabled)
+ genwqe_check_ddcb_queue(cd, queue);
+
+ /**
+ * It must be ensured to process all DDCBs in successive
+ * order. Use a lock here in order to prevent nested DDCB
+ * enqueuing.
+ */
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+
+ pddcb = get_next_ddcb(cd, queue, &req->num); /* get ptr and num */
+ if (pddcb == NULL) {
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ queue->busy++;
+ return -EBUSY;
+ }
+
+ if (queue->ddcb_req[req->num] != NULL) {
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+
+ dev_err(&pci_dev->dev,
+ "[%s] picked DDCB %d with req=%p still in use!!\n",
+ __func__, req->num, req);
+ return -EFAULT;
+ }
+ ddcb_requ_set_state(req, GENWQE_REQU_ENQUEUED);
+ queue->ddcb_req[req->num] = req;
+
+ pddcb->cmdopts_16 = cpu_to_be16(req->cmd.cmdopts);
+ pddcb->cmd = req->cmd.cmd;
+ pddcb->acfunc = req->cmd.acfunc; /* functional unit */
+
+ /**
+ * We know that we can get retc 0x104 with CRC error, do not
+ * stop the queue in those cases for this command. XDIR = 1
+ * does not work for old SLU versions.
+ *
+ * Last bitstream with the old XDIR behavior had SLU_ID
+ * 0x34199.
+ */
+ if ((cd->slu_unitcfg & 0xFFFF0ull) > 0x34199ull)
+ pddcb->xdir = 0x1;
+ else
+ pddcb->xdir = 0x0;
+
+
+ pddcb->psp = (((req->cmd.asiv_length / 8) << 4) |
+ ((req->cmd.asv_length / 8)));
+ pddcb->disp_ts_64 = cpu_to_be64(req->cmd.disp_ts);
+
+ /* NOTE: If copying the whole DDCB_ASIV_LENGTH is impacting
+ * performance we need to change it to req->cmd.asiv_length. But
+ * simulation benefits from some non-architectured bits behind
+ * the architectured content.
+ *
+ * NOTE: how much data is copied depends on the availability
+ * of the ATS field, which was introduced late. If the ATS
+ * field is supported ASIV is 8 bytes shorter than it used to
+ * be. Since the ATS field is copied too, the code should do
+ * exactly what it did before, but I wanted to make copying of
+ * the ATS field very explicit.
+ */
+ if (genwqe_get_slu_id(cd) <= 0x2) {
+ memcpy(&pddcb->__asiv[0], /* destination */
+ &req->cmd.__asiv[0], /* source */
+ DDCB_ASIV_LENGTH); /* req->cmd.asiv_length */
+ } else {
+ pddcb->n.ats_64 = req->cmd.ats;
+ memcpy(&pddcb->n.asiv[0], /* destination */
+ &req->cmd.asiv[0], /* source */
+ DDCB_ASIV_LENGTH_ATS); /* req->cmd.asiv_length */
+ }
+
+ pddcb->icrc_hsi_shi_32 = cpu_to_be32(0x00000000); /* for crc */
+
+ /**
+ * Calculate CRC_16 for corresponding range PSP(7:4). Include
+ * empty 4 bytes prior to the data.
+ */
+ icrc = genwqe_crc16((const u8 *)pddcb,
+ ICRC_LENGTH(req->cmd.asiv_length), 0xffff);
+ pddcb->icrc_hsi_shi_32 = cpu_to_be32((u32)icrc << 16);
+
+ /* enable DDCB completion irq */
+ if (!genwqe_polling_enabled)
+ pddcb->icrc_hsi_shi_32 |= DDCB_INTR_BE32;
+
+ if (genwqe_debug & dbg_card_ddcb) {
+ dbg_printk(cd, dbg_card_ddcb, "INPUT DDCB#%d\n", req->num);
+ genwqe_hexdump(pci_dev, pddcb, sizeof(*pddcb));
+ }
+
+ if (ddcb_requ_collect_debug_data(req)) {
+ /* use the kernel copy of debug data. copying back to
+ user buffer happens later */
+
+ genwqe_init_debug_data(cd, &req->debug_data);
+ memcpy(&req->debug_data.ddcb_before, pddcb,
+ sizeof(req->debug_data.ddcb_before));
+ }
+
+ enqueue_ddcb(cd, queue, pddcb, req->num);
+ queue->ddcbs_in_flight++;
+
+ if (queue->ddcbs_in_flight > queue->ddcbs_max_in_flight)
+ queue->ddcbs_max_in_flight = queue->ddcbs_in_flight;
+
+ ddcb_requ_set_state(req, GENWQE_REQU_TAPPED);
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ wake_up_interruptible(&cd->queue_waitq);
+
+ return 0;
+}
+
+/**
+ * @brief setup and execute an ECH DDCB for SLU processing
+ * @note Gets called via IOCTL.
+ *
+ * @param cd pointer to genwqe device descriptor
+ * @param req user provided parameter set
+ */
+int __genwqe_execute_raw_ddcb(struct genwqe_dev *cd,
+ struct genwqe_ddcb_cmd *cmd)
+{
+ int rc = 0;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ struct ddcb_requ *req = container_of(cmd, struct ddcb_requ, cmd);
+
+ if (cmd->asiv_length > DDCB_ASIV_LENGTH) {
+ dev_err(&pci_dev->dev, "[%s] err: wrong asiv_length of %d\n",
+ __func__, cmd->asiv_length);
+ return -EINVAL;
+ }
+ if (cmd->asv_length > DDCB_ASV_LENGTH) {
+ dev_err(&pci_dev->dev, "[%s] err: wrong asv_length of %d\n",
+ __func__, cmd->asiv_length);
+ return -EINVAL;
+ }
+ rc = __genwqe_enqueue_ddcb(cd, req);
+ if (rc != 0)
+ return rc;
+
+ rc = __genwqe_wait_ddcb(cd, req);
+ if (rc < 0) /* error or signal interrupt */
+ goto err_exit;
+
+ if (ddcb_requ_collect_debug_data(req)) {
+ if (copy_to_user(cmd->debug_data, &req->debug_data,
+ sizeof(*cmd->debug_data))) {
+ dev_warn(&pci_dev->dev,
+ "warn: could not copy debug data to user!\n");
+ }
+ }
+
+ /**
+ * Higher values than 0x102 indicate completion with faults,
+ * lower values than 0x102 indicate processing faults. Note
+ * that DDCB might have been purged. E.g. Cntl+C.
+ */
+ if (cmd->retc != DDCB_RETC_COMPLETE) {
+ /* This might happen e.g. flash read, and needs to be
+ handled by the upper layer code. */
+ rc = -EBADMSG; /* not processed/error retc */
+ }
+
+ return rc;
+
+ err_exit:
+ __genwqe_purge_ddcb(cd, req);
+
+ if (ddcb_requ_collect_debug_data(req)) {
+ if (copy_to_user(cmd->debug_data, &req->debug_data,
+ sizeof(*cmd->debug_data))) {
+ dev_warn(&pci_dev->dev,
+ "warn: could not copy debug data to user!\n");
+ }
+ }
+ return rc;
+}
+
+/**
+ * Figure out if the next DDCB is already finished. We need this as
+ * condition for our wait-queue code.
+ */
+int genwqe_next_ddcb_ready(struct genwqe_dev *cd)
+{
+ unsigned long flags;
+ struct ddcb *pddcb;
+ struct ddcb_queue *queue = &cd->queue;
+
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+
+ if (queue_empty(queue)) { /* emtpy queue */
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ return 0;
+ }
+
+ pddcb = &queue->ddcb_vaddr[queue->ddcb_act];
+ if (pddcb->icrc_hsi_shi_32 & DDCB_COMPLETED_BE32) { /* ddcb ready */
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ return 1;
+ }
+
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ return 0;
+}
+
+/**
+ * Keep track on the number of DDCBs which ware currently in the
+ * queue. This is needed for statistics as well as conditon if we want
+ * to wait or better do polling in case of no interrupts available.
+ */
+int genwqe_ddcbs_in_flight(struct genwqe_dev *cd)
+{
+ unsigned long flags;
+ int ddcbs_in_flight = 0;
+ struct ddcb_queue *queue = &cd->queue;
+
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+ ddcbs_in_flight += queue->ddcbs_in_flight;
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+
+ return ddcbs_in_flight;
+}
+
+/**
+ * @brief This function checks the DDCB queue for completed work
+ * requests. When a completed request is found, we use the
+ * request struct to inform the requestor.
+ *
+ * FIXME If in a two CPU system, one fills the queue and the other
+ * handles the interrupt, it might occur that the interrupt is never
+ * exited. This might lead to problems on that CPU where other
+ * processes will starve.
+ *
+ * @param cd pointer to genwqe device descriptor
+ * @return number of DDCBs which were finished
+ */
+int genwqe_check_ddcb_queue(struct genwqe_dev *cd, struct ddcb_queue *queue)
+{
+ unsigned long flags;
+ int ddcbs_finished = 0;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+
+ /* FIXME avoid soft locking CPU */
+ while (!queue_empty(queue) && (ddcbs_finished < queue->ddcb_max)) {
+
+ struct ddcb *pddcb;
+ struct ddcb_requ *req;
+ u16 vcrc, vcrc_16, retc_16;
+
+ pddcb = &queue->ddcb_vaddr[queue->ddcb_act];
+
+ if ((pddcb->icrc_hsi_shi_32 & DDCB_COMPLETED_BE32) ==
+ 0x00000000)
+ goto go_home; /* not completed, continue waiting */
+
+ /* Note: DDCB could be purged */
+
+ req = queue->ddcb_req[queue->ddcb_act];
+ if (req == NULL) {
+ /* this occurs if DDCB is purged, not an error */
+ /* Move active DDCB further; Nothing to do anymore. */
+ goto pick_next_one;
+ }
+
+ /**
+ * HSI=0x44 (fetched and completed), but RETC is
+ * 0x101, or even worse 0x000.
+ *
+ * In case of seeing the queue in inconsistent state
+ * we read the errcnts and the queue status to provide
+ * a trigger for our PCIe analyzer stop capturing.
+ */
+ retc_16 = be16_to_cpu(pddcb->retc_16);
+ if ((pddcb->hsi == 0x44) && (retc_16 <= 0x101)) {
+ u64 errcnts, status;
+ u64 ddcb_offs = (u64)pddcb - (u64)queue->ddcb_vaddr;
+
+ errcnts = __genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS);
+ status = __genwqe_readq(cd, queue->IO_QUEUE_STATUS);
+
+ dev_err(&pci_dev->dev,
+ "[%s] SEQN=%04x HSI=%02x RETC=%03x "
+ " Q_ERRCNTS=%016llx Q_STATUS=%016llx\n"
+ " DDCB_DMA_ADDR=%016llx\n",
+ __func__, be16_to_cpu(pddcb->seqnum_16),
+ pddcb->hsi, retc_16, errcnts, status,
+ queue->ddcb_daddr + ddcb_offs);
+ }
+
+ copy_ddcb_results(req, queue->ddcb_act);
+ queue->ddcb_req[queue->ddcb_act] = NULL; /* take from queue */
+
+ if (genwqe_debug & dbg_card_ddcb) {
+ dbg_printk(cd, dbg_card_ddcb, "FINISHED DDCB#%d\n",
+ req->num);
+ genwqe_hexdump(pci_dev, pddcb, sizeof(*pddcb));
+ }
+
+ ddcb_mark_finished(pddcb);
+
+ /* calculate CRC_16 to see if VCRC is correct */
+ vcrc = genwqe_crc16(pddcb->asv,
+ VCRC_LENGTH(req->cmd.asv_length),
+ 0xffff);
+ vcrc_16 = be16_to_cpu(pddcb->vcrc_16);
+ if (vcrc != vcrc_16) {
+ static int count;
+
+ if (count++ < 5)
+ dev_err(&pci_dev->dev,
+ "err: wrong VCRC pre=%02x vcrc_len=%d "
+ "bytes vcrc_data=%04x is not "
+ "vcrc_card=%04x\n",
+ pddcb->pre,
+ VCRC_LENGTH(req->cmd.asv_length),
+ vcrc, vcrc_16);
+ }
+
+ ddcb_requ_set_state(req, GENWQE_REQU_FINISHED);
+ queue->ddcbs_completed++;
+ queue->ddcbs_in_flight--;
+
+ /* wake up process waiting for this DDCB */
+ wake_up_interruptible(&queue->ddcb_waitqs[queue->ddcb_act]);
+
+pick_next_one:
+ queue->ddcb_act = (queue->ddcb_act + 1) % queue->ddcb_max;
+ ddcbs_finished++;
+ }
+
+ go_home:
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+ return ddcbs_finished;
+}
+
+static int setup_ddcb_queue(struct genwqe_dev *cd, struct ddcb_queue *queue)
+{
+ int rc, i;
+ struct ddcb *pddcb;
+ u64 val64;
+ unsigned int queue_size;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (genwqe_ddcb_max < 2)
+ return -EINVAL;
+
+ queue_size = roundup(genwqe_ddcb_max * sizeof(struct ddcb), PAGE_SIZE);
+
+ queue->ddcbs_in_flight = 0; /* statistics */
+ queue->ddcbs_max_in_flight = 0;
+ queue->ddcbs_completed = 0;
+ queue->busy = 0;
+
+ queue->ddcb_seq = 0x100; /* start sequence number */
+ queue->ddcb_max = genwqe_ddcb_max; /* module parameter */
+ queue->ddcb_vaddr = __genwqe_alloc_consistent(cd, queue_size,
+ &queue->ddcb_daddr);
+ if (queue->ddcb_vaddr == NULL) {
+ dev_err(&pci_dev->dev,
+ "[%s] **err: could not allocate DDCB **\n", __func__);
+ return -ENOMEM;
+ }
+ memset(queue->ddcb_vaddr, 0, queue_size);
+
+ queue->ddcb_req = kzalloc(sizeof(struct ddcb_requ *) *
+ queue->ddcb_max, GFP_KERNEL);
+ if (!queue->ddcb_req) {
+ rc = -ENOMEM;
+ goto free_ddcbs;
+ }
+
+ queue->ddcb_waitqs = kzalloc(sizeof(wait_queue_head_t) *
+ queue->ddcb_max, GFP_KERNEL);
+ if (!queue->ddcb_waitqs) {
+ rc = -ENOMEM;
+ goto free_requs;
+ }
+
+ for (i = 0; i < queue->ddcb_max; i++) {
+ pddcb = &queue->ddcb_vaddr[i]; /* DDCBs */
+ pddcb->icrc_hsi_shi_32 = DDCB_COMPLETED_BE32;
+ pddcb->retc_16 = cpu_to_be16(0xfff);
+
+ queue->ddcb_req[i] = NULL; /* requests */
+ init_waitqueue_head(&queue->ddcb_waitqs[i]); /* waitqueues */
+ }
+
+ queue->ddcb_act = 0;
+ queue->ddcb_next = 0; /* queue is empty */
+
+ spin_lock_init(&queue->ddcb_lock);
+ init_waitqueue_head(&queue->ddcb_waitq);
+
+ val64 = ((u64)(queue->ddcb_max - 1) << 8); /* lastptr */
+ __genwqe_writeq(cd, queue->IO_QUEUE_CONFIG, 0x07); /* iCRC/vCRC */
+ __genwqe_writeq(cd, queue->IO_QUEUE_SEGMENT, queue->ddcb_daddr);
+ __genwqe_writeq(cd, queue->IO_QUEUE_INITSQN, queue->ddcb_seq);
+ __genwqe_writeq(cd, queue->IO_QUEUE_WRAP, val64);
+ return 0;
+
+ free_requs:
+ kfree(queue->ddcb_req);
+ queue->ddcb_req = NULL;
+ free_ddcbs:
+ __genwqe_free_consistent(cd, queue_size, queue->ddcb_vaddr,
+ queue->ddcb_daddr);
+ queue->ddcb_vaddr = NULL;
+ queue->ddcb_daddr = 0ull;
+ return -ENODEV;
+
+}
+
+static int ddcb_queue_initialized(struct ddcb_queue *queue)
+{
+ return (queue->ddcb_vaddr != NULL);
+}
+
+static void free_ddcb_queue(struct genwqe_dev *cd, struct ddcb_queue *queue)
+{
+ unsigned int queue_size;
+
+ queue_size = roundup(queue->ddcb_max * sizeof(struct ddcb), PAGE_SIZE);
+
+ kfree(queue->ddcb_req);
+ queue->ddcb_req = NULL;
+
+ if (queue->ddcb_vaddr) {
+ __genwqe_free_consistent(cd, queue_size, queue->ddcb_vaddr,
+ queue->ddcb_daddr);
+ queue->ddcb_vaddr = NULL;
+ queue->ddcb_daddr = 0ull;
+ }
+}
+
+static irqreturn_t genwqe_pf_isr(int irq, void *dev_id)
+{
+ u64 gfir;
+ struct genwqe_dev *cd = (struct genwqe_dev *)dev_id;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ static int count;
+
+ /**
+ * In case of fatal FIR error the queue is stopped, such that
+ * we can safely check it without risking anything.
+ */
+ cd->irqs_processed++;
+ wake_up_interruptible(&cd->queue_waitq);
+
+ /**
+ * Checking for errors before kicking the queue might be
+ * safer, but slower for the good-case ... See above.
+ */
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ if ((gfir & GFIR_ERR_TRIGGER) != 0x0) {
+
+ wake_up_interruptible(&cd->health_waitq);
+
+ /* By default GFIRs causes recovery actions.
+ This count is just for debug when recovery is masked */
+ if (count++ < 20) {
+ dev_err(&pci_dev->dev,
+ "[%s] GFIR=%016llx\n", __func__, gfir);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t genwqe_vf_isr(int irq, void *dev_id)
+{
+ struct genwqe_dev *cd = (struct genwqe_dev *)dev_id;
+
+ cd->irqs_processed++;
+ wake_up_interruptible(&cd->queue_waitq);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * The idea is to check if there are DDCBs in processing. If so, we do
+ * a short wait using cond_resched(). That should still allow others
+ * to do work.
+ *
+ * If there is no work to do we check every timer tick. To get out of
+ * this wait, we have the tap_ddcb() function kick the queue_waitq
+ * such that we drop out of this wait and are able to adjust the wait
+ * time when DDCBs are in flight.
+ */
+static int genwqe_card_thread(void *data)
+{
+ int should_stop = 0, rc = 0;
+ struct genwqe_dev *cd = (struct genwqe_dev *)data;
+
+ while (!kthread_should_stop()) {
+
+ genwqe_check_ddcb_queue(cd, &cd->queue);
+ if (genwqe_polling_enabled) {
+ rc = wait_event_interruptible_timeout(
+ cd->queue_waitq,
+ genwqe_ddcbs_in_flight(cd) ||
+ (should_stop = kthread_should_stop()), 1);
+ } else {
+ rc = wait_event_interruptible_timeout(
+ cd->queue_waitq,
+ genwqe_next_ddcb_ready(cd) ||
+ (should_stop = kthread_should_stop()), HZ);
+ }
+ if (should_stop)
+ break;
+
+ /* avoid soft lockups on heavy loads; we do not want
+ to disable our interrupts */
+ cond_resched();
+ }
+ return 0;
+}
+
+/**
+ * @brief setup DDCBs for service layer of Physical Function
+ * - allocate DDCBs
+ * - configure Service Layer Controller (SLC)
+ *
+ * @param cd pointer to genwqe device descriptor
+ * @return 0 if success
+ */
+int genwqe_setup_service_layer(struct genwqe_dev *cd)
+{
+ int rc;
+ struct ddcb_queue *queue;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ /* reset the card ****************************************************/
+ if (!genwqe_skip_reset && genwqe_is_privileged(cd)) {
+ rc = genwqe_card_reset(cd); /* RESET CARD!! */
+ if (rc < 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: reset failed.\n", __func__);
+ return rc;
+ }
+ genwqe_read_softreset(cd);
+ }
+
+ /* Setup the DDCB queue **********************************************/
+ queue = &cd->queue;
+ queue->IO_QUEUE_CONFIG = IO_SLC_QUEUE_CONFIG;
+ queue->IO_QUEUE_STATUS = IO_SLC_QUEUE_STATUS;
+ queue->IO_QUEUE_SEGMENT = IO_SLC_QUEUE_SEGMENT;
+ queue->IO_QUEUE_INITSQN = IO_SLC_QUEUE_INITSQN;
+ queue->IO_QUEUE_OFFSET = IO_SLC_QUEUE_OFFSET;
+ queue->IO_QUEUE_WRAP = IO_SLC_QUEUE_WRAP;
+ queue->IO_QUEUE_WTIME = IO_SLC_QUEUE_WTIME;
+ queue->IO_QUEUE_ERRCNTS = IO_SLC_QUEUE_ERRCNTS;
+ queue->IO_QUEUE_LRW = IO_SLC_QUEUE_LRW;
+
+ rc = setup_ddcb_queue(cd, queue);
+ if (rc != 0) {
+ rc = -ENODEV;
+ goto err_out;
+ }
+
+ /* start genwqe maintenance thread ***********************************/
+ init_waitqueue_head(&cd->queue_waitq);
+ cd->card_thread = kthread_run(genwqe_card_thread, cd,
+ GENWQE_DEVNAME "%d_thread",
+ cd->card_idx);
+ if (IS_ERR(cd->card_thread)) {
+ rc = PTR_ERR(cd->card_thread);
+ cd->card_thread = NULL;
+ goto stop_free_queue;
+ }
+
+ /* Interrupt enablement **********************************************/
+ rc = genwqe_set_interrupt_capability(cd, GENWQE_MSI_IRQS);
+ if (rc > 0)
+ rc = genwqe_set_interrupt_capability(cd, rc);
+ if (rc != 0) {
+ rc = -ENODEV;
+ goto stop_kthread;
+ }
+
+ /**
+ * We must have all wait-queues initialized when we enable the
+ * interrupts. Otherwise we might crash if we get an early
+ * irq.
+ */
+ init_waitqueue_head(&cd->health_waitq);
+
+ if (genwqe_is_privileged(cd)) {
+ rc = request_irq(pci_dev->irq, genwqe_pf_isr, IRQF_SHARED,
+ GENWQE_DEVNAME, cd);
+ } else {
+ rc = request_irq(pci_dev->irq, genwqe_vf_isr, IRQF_SHARED,
+ GENWQE_DEVNAME, cd);
+ }
+ if (rc < 0) {
+ dev_err(&pci_dev->dev, "irq %d not free.\n", pci_dev->irq);
+ goto stop_irq_cap;
+ }
+
+ cd->card_state = GENWQE_CARD_USED;
+ return 0;
+
+ stop_irq_cap:
+ genwqe_reset_interrupt_capability(cd);
+ stop_kthread:
+ kthread_stop(cd->card_thread); /* stop maintenance thread */
+ cd->card_thread = NULL;
+ stop_free_queue:
+ free_ddcb_queue(cd, queue);
+ err_out:
+ return rc;
+}
+
+/**
+ * This function is for the fatal error case. The PCI device got
+ * unusable and we have to stop all pending requests as fast as we
+ * can. The code after this must purge the DDCBs in question and
+ * ensure that all mappings are freed.
+ */
+static int queue_wake_up_all(struct genwqe_dev *cd)
+{
+ unsigned int i;
+ unsigned long flags;
+ struct ddcb_queue *queue = &cd->queue;
+
+ spin_lock_irqsave(&queue->ddcb_lock, flags);
+
+ for (i = 0; i < queue->ddcb_max; i++)
+ wake_up_interruptible(&queue->ddcb_waitqs[queue->ddcb_act]);
+
+ spin_unlock_irqrestore(&queue->ddcb_lock, flags);
+
+ return 0;
+}
+
+/**
+ * @brief This function will remove any genwqe devices and
+ * user-interfaces but it relies on the pre-condition that there are
+ * no users of the card device anymore e.g. with open
+ * file-descriptors.
+ *
+ * @note This function must be robust enough to be called twice.
+ */
+int genwqe_finish_queue(struct genwqe_dev *cd)
+{
+ int i, rc, in_flight;
+ int waitmax = genwqe_ddcb_software_timeout;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ struct ddcb_queue *queue = &cd->queue;
+
+ if (!ddcb_queue_initialized(queue))
+ return 0;
+
+ /* Do not wipe out the error state. */
+ if (cd->card_state == GENWQE_CARD_USED)
+ cd->card_state = GENWQE_CARD_UNUSED;
+
+ /* Wake up all requests in the DDCB queue such that they
+ should be removed nicely. */
+ queue_wake_up_all(cd);
+
+ /* We must wait to get rid of the DDCBs in flight */
+ for (i = 0; i < waitmax; i++) {
+ in_flight = genwqe_ddcbs_in_flight(cd);
+
+ if (in_flight == 0)
+ break;
+
+ dev_info(&pci_dev->dev,
+ " DEBUG [%d/%d] waiting for queue to get empty: "
+ "%d requests!\n", i, waitmax, in_flight);
+ msleep(1000);
+ }
+ if (i == waitmax) {
+ dev_err(&pci_dev->dev, " [%s] err: queue is not empty!!\n",
+ __func__);
+ rc = -EIO;
+ }
+ return rc;
+}
+
+/**
+ * @brief release DDCBs for service layer of Physical Function
+ * @param cd genwqe device descriptor
+ *
+ * @note This function must be robust enough to be called twice.
+ */
+int genwqe_release_service_layer(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (!ddcb_queue_initialized(&cd->queue))
+ return 1;
+
+ free_irq(pci_dev->irq, cd);
+ genwqe_reset_interrupt_capability(cd);
+
+ if (cd->card_thread != NULL) {
+ kthread_stop(cd->card_thread);
+ cd->card_thread = NULL;
+ }
+
+ free_ddcb_queue(cd, &cd->queue);
+ return 0;
+}
diff --git a/drivers/misc/genwqe/card_ddcb.h b/drivers/misc/genwqe/card_ddcb.h
new file mode 100644
index 0000000..8072241
--- /dev/null
+++ b/drivers/misc/genwqe/card_ddcb.h
@@ -0,0 +1,159 @@
+#ifndef __CARD_DDCB_H__
+#define __CARD_DDCB_H__
+
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#include "genwqe_driver.h"
+#include "card_base.h"
+
+/******************************************************************************
+ * Device Driver Control Block DDCB (spec 9.5)
+ * format: Big Endian
+ *****************************************************************************/
+
+#define ASIV_LENGTH 104 /* Old specification without ATS field */
+#define ASIV_LENGTH_ATS 96 /* New specification with ATS field */
+#define ASV_LENGTH 64
+
+struct ddcb {
+ union {
+ __be32 icrc_hsi_shi_32; /**< iCRC, Hardware/SW interlock */
+ struct {
+ __be16 icrc_16;
+ u8 hsi;
+ u8 shi;
+ };
+ };
+ u8 pre; /**< Preamble */
+ u8 xdir; /**< Execution Directives */
+ __be16 seqnum_16; /**< Sequence Number */
+
+ u8 acfunc; /**< Accelerator Function.. */
+ u8 cmd; /**< Command. */
+ __be16 cmdopts_16; /**< Command Options */
+ u8 sur; /**< Status Update Rate */
+ u8 psp; /**< Protection Section Pointer */
+ __be16 rsvd_0e_16; /**< Reserved invariant */
+
+ __be64 fwiv_64; /**< Firmware Invariant. */
+
+ union {
+ struct {
+ __be64 ats_64; /**< Address Translation Spec */
+ u8 asiv[ASIV_LENGTH_ATS]; /**< New ASIV */
+ } n;
+ u8 __asiv[ASIV_LENGTH]; /**< obsolete */
+ };
+ u8 asv[ASV_LENGTH]; /**< Appl Spec Variant */
+
+ __be16 rsvd_c0_16; /**< Reserved Variant */
+ __be16 vcrc_16; /**< Variant CRC */
+ __be32 rsvd_32; /**< Reserved unprotected */
+
+ __be64 deque_ts_64; /**< Deque Time Stamp. */
+
+ __be16 retc_16; /**< Return Code */
+ __be16 attn_16; /**< Attention/Extended Error Codes */
+ __be32 progress_32; /**< Progress indicator. */
+
+ __be64 cmplt_ts_64; /**< Completion Time Stamp. */
+
+ /* The following layout matches the new service layer format */
+ __be32 ibdc_32; /**< Inbound Data Count (* 256) */
+ __be32 obdc_32; /**< Outbound Data Count (* 256) */
+
+ __be64 rsvd_SLH_64; /**< Reserved for hardware */
+ union { /**< private data for driver */
+ u8 priv[8];
+ __be64 priv_64;
+ };
+ __be64 disp_ts_64; /**< Dispatch TimeStamp */
+} __attribute__((__packed__));
+
+/* CRC polynomials for DDCB */
+#define CRC16_POLYNOMIAL 0x1021
+
+/**
+ * SHI: Software to Hardware Interlock
+ * This 1 byte field is written by software to interlock the
+ * movement of one queue entry to another with the hardware in the
+ * chip.
+ */
+#define DDCB_SHI_INTR 0x04 /* Bit 2 */
+#define DDCB_SHI_PURGE 0x02 /* Bit 1 */
+#define DDCB_SHI_NEXT 0x01 /* Bit 0 */
+
+/* HSI: Hardware to Software interlock
+ * This 1 byte field is written by hardware to interlock the movement
+ * of one queue entry to another with the software in the chip.
+ */
+#define DDCB_HSI_COMPLETED 0x40 /* Bit 6 */
+#define DDCB_HSI_FETCHED 0x04 /* Bit 2 */
+
+/**
+ * Accessing HSI/SHI is done 32-bit wide
+ * Normally 16-bit access would work too, but on some platforms the
+ * 16 compare and swap operation is not supported. Therefore
+ * switching to 32-bit such that those platforms will work too.
+ *
+ * iCRC HSI/SHI
+ */
+#define DDCB_INTR_BE32 cpu_to_be32(0x00000004)
+#define DDCB_PURGE_BE32 cpu_to_be32(0x00000002)
+#define DDCB_NEXT_BE32 cpu_to_be32(0x00000001)
+#define DDCB_COMPLETED_BE32 cpu_to_be32(0x00004000)
+#define DDCB_FETCHED_BE32 cpu_to_be32(0x00000400)
+
+/* Definitions of DDCB presets */
+#define DDCB_PRESET_PRE 0x80
+#define ICRC_LENGTH(n) ((n) + 8 + 8 + 8) /* used ASIV + hdr fields */
+#define VCRC_LENGTH(n) ((n)) /* used ASV */
+
+/******************************************************************************
+ * Genwqe Scatter Gather list
+ * FIXME Check the spec if those values got modified ...
+ * Each element has up to 8 entries.
+ * The chaining element is element 0 cause of prefetching needs.
+ *****************************************************************************/
+
+/* 0b0110 Chained descriptor. The descriptor is describing the next
+ descriptor list. */
+#define SG_CHAINED (0x6)
+
+/* 0b0010 First entry of a descriptor list. Start from a Buffer-Empty
+ condition. */
+#define SG_DATA (0x2)
+
+/* 0b0000 Early terminator. This is the last entry on the list
+ irregardless of the length indicated. */
+#define SG_END_LIST (0x0)
+
+struct sg_entry {
+ __be64 target_addr;
+ __be32 len;
+ __be32 flags;
+};
+
+#endif /* __CARD_DDCB_H__ */
diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c
new file mode 100644
index 0000000..1052832
--- /dev/null
+++ b/drivers/misc/genwqe/card_dev.c
@@ -0,0 +1,1614 @@
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Character device representation of the GenWQE device. This allows
+ * user-space applications to communicate with the card.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/atomic.h>
+
+#include "card_base.h"
+#include "card_ddcb.h"
+
+static const int ffdcid_to_unitid[] = {
+ [GENWQE_DBG_UNIT0] = 0, [GENWQE_DBG_UNIT1] = 1,
+ [GENWQE_DBG_UNIT2] = 2, [GENWQE_DBG_UNIT3] = 3,
+ [GENWQE_DBG_UNIT4] = 4, [GENWQE_DBG_UNIT5] = 5,
+ [GENWQE_DBG_UNIT6] = 6, [GENWQE_DBG_UNIT7] = 7,
+};
+
+static int genwqe_open_files(struct genwqe_dev *cd)
+{
+ int rc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cd->file_lock, flags);
+ rc = list_empty(&cd->file_list);
+ spin_unlock_irqrestore(&cd->file_lock, flags);
+ return !rc;
+}
+
+static void genwqe_add_file(struct genwqe_dev *cd, struct genwqe_file *cfile)
+{
+ unsigned long flags;
+
+ cfile->owner = current;
+ spin_lock_irqsave(&cd->file_lock, flags);
+ list_add(&cfile->list, &cd->file_list);
+ spin_unlock_irqrestore(&cd->file_lock, flags);
+}
+
+static int genwqe_del_file(struct genwqe_dev *cd, struct genwqe_file *cfile)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cd->file_lock, flags);
+ list_del(&cfile->list);
+ spin_unlock_irqrestore(&cd->file_lock, flags);
+
+ return 0;
+}
+
+static void genwqe_add_pin(struct genwqe_file *cfile, struct dma_mapping *m)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cfile->pin_lock, flags);
+ list_add(&m->pin_list, &cfile->pin_list);
+ spin_unlock_irqrestore(&cfile->pin_lock, flags);
+}
+
+static int genwqe_del_pin(struct genwqe_file *cfile, struct dma_mapping *m)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cfile->pin_lock, flags);
+ list_del(&m->pin_list);
+ spin_unlock_irqrestore(&cfile->pin_lock, flags);
+
+ return 0;
+}
+
+/**
+ * @brief Search for the mapping for a userspace address
+ *
+ * @param zdev descriptor of opened zcom file
+ * @param u_addr user virtual address
+ * @param size size of buffer
+ * @param dma_addr [out] DMA address to be updated
+ *
+ * @return pointer to the corresponding mapping
+ * NULL if not found
+ */
+static struct dma_mapping *genwqe_search_pin(struct genwqe_file *cfile,
+ unsigned long u_addr,
+ unsigned int size,
+ void **virt_addr)
+{
+ unsigned long flags;
+ struct dma_mapping *m;
+
+ spin_lock_irqsave(&cfile->pin_lock, flags);
+
+ list_for_each_entry(m, &cfile->pin_list, pin_list) {
+ if ((((u64)m->u_vaddr) <= (u_addr)) &&
+ (((u64)m->u_vaddr + m->size) >= (u_addr + size))) {
+
+ if (virt_addr)
+ *virt_addr = m->k_vaddr +
+ (u_addr - (u64)m->u_vaddr);
+
+ spin_unlock_irqrestore(&cfile->pin_lock, flags);
+ return m;
+ }
+ }
+ spin_unlock_irqrestore(&cfile->pin_lock, flags);
+ return NULL;
+}
+
+static void __genwqe_add_mapping(struct genwqe_file *cfile,
+ struct dma_mapping *dma_map)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cfile->map_lock, flags);
+ list_add(&dma_map->card_list, &cfile->map_list);
+ spin_unlock_irqrestore(&cfile->map_lock, flags);
+}
+
+static void __genwqe_del_mapping(struct genwqe_file *cfile,
+ struct dma_mapping *dma_map)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cfile->map_lock, flags);
+ list_del(&dma_map->card_list);
+ spin_unlock_irqrestore(&cfile->map_lock, flags);
+}
+
+
+/**
+ * @brief Search for the mapping for a userspace address
+ *
+ * @param cfile descriptor of opened file
+ * @param u_addr user virtual address
+ * @param size size of buffer
+ * @param dma_addr [out] DMA address to be updated
+ *
+ * @return pointer to the corresponding mapping
+ * NULL if not found
+ */
+static struct dma_mapping *__genwqe_search_mapping(struct genwqe_file *cfile,
+ unsigned long u_addr,
+ unsigned int size,
+ dma_addr_t *dma_addr,
+ void **virt_addr)
+{
+ unsigned long flags;
+ struct dma_mapping *m;
+ struct pci_dev *pci_dev = cfile->cd->pci_dev;
+
+ spin_lock_irqsave(&cfile->map_lock, flags);
+ list_for_each_entry(m, &cfile->map_list, card_list) {
+
+ if ((((u64)m->u_vaddr) <= (u_addr)) &&
+ (((u64)m->u_vaddr + m->size) >= (u_addr + size))) {
+
+ /* match found: current is as expected and
+ addr is in range */
+ if (dma_addr)
+ *dma_addr = m->dma_addr +
+ (u_addr - (u64)m->u_vaddr);
+
+ if (virt_addr)
+ *virt_addr = m->k_vaddr +
+ (u_addr - (u64)m->u_vaddr);
+
+ spin_unlock_irqrestore(&cfile->map_lock, flags);
+ return m;
+ }
+ }
+ spin_unlock_irqrestore(&cfile->map_lock, flags);
+
+ dev_err(&pci_dev->dev,
+ "[%s] Entry not found: u_addr=%lx, size=%x\n",
+ __func__, u_addr, size);
+
+ return NULL;
+}
+
+static void genwqe_remove_mappings(struct genwqe_file *cfile)
+{
+ int i = 0;
+ struct list_head *node, *next;
+ struct dma_mapping *dma_map;
+ struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cfile->cd->pci_dev;
+
+ list_for_each_safe(node, next, &cfile->map_list) {
+ dma_map = list_entry(node, struct dma_mapping, card_list);
+
+ list_del_init(&dma_map->card_list);
+
+ /**
+ * This is really a bug, because those things should
+ * have been already tidied up.
+ *
+ * GENWQE_MAPPING_RAW should have been removed via mmunmap().
+ * GENWQE_MAPPING_SGL_TEMP should be removed by tidy up code.
+ */
+ dev_err(&pci_dev->dev,
+ "[%s] %d. cleanup mapping: u_vaddr=%p "
+ "u_kaddr=%016lx dma_addr=%llx\n", __func__, i++,
+ dma_map->u_vaddr, (unsigned long)dma_map->k_vaddr,
+ dma_map->dma_addr);
+
+ if (dma_map->type == GENWQE_MAPPING_RAW) {
+ /* we allocated this dynamically */
+ __genwqe_free_consistent(cd, dma_map->size,
+ dma_map->k_vaddr,
+ dma_map->dma_addr);
+ kfree(dma_map);
+ } else if (dma_map->type == GENWQE_MAPPING_SGL_TEMP) {
+ /* we use dma_map statically from the request */
+ user_vunmap(cd, dma_map, NULL);
+ }
+ }
+}
+
+static void genwqe_remove_pinnings(struct genwqe_file *cfile)
+{
+ int i = 0;
+ struct list_head *node, *next;
+ struct dma_mapping *dma_map;
+ struct genwqe_dev *cd = cfile->cd;
+
+ list_for_each_safe(node, next, &cfile->pin_list) {
+ dma_map = list_entry(node, struct dma_mapping, pin_list);
+
+ /**
+ * This is not a bug, because a killed processed might
+ * not call the unpin ioctl, which is supposed to free
+ * the resources.
+ *
+ * Pinnings are dymically allocated and need to be
+ * deleted.
+ */
+ list_del_init(&dma_map->pin_list);
+
+ dbg_printk(cd, dbg_card_pinning,
+ "[%s] %d. not all pinnings removed: "
+ "u_vaddr=%p size=%08x u_kaddr=%016lx "
+ "dma_addr=%llx\n", __func__, i++,
+ dma_map->u_vaddr, dma_map->size,
+ (unsigned long)dma_map->k_vaddr,
+ dma_map->dma_addr);
+
+ user_vunmap(cd, dma_map, NULL);
+ kfree(dma_map);
+ }
+}
+
+/**
+ * E.g. genwqe_send_signal(cd, SIGIO);
+ */
+static int genwqe_kill_fasync(struct genwqe_dev *cd, int sig)
+{
+ unsigned int files = 0;
+ unsigned long flags;
+ struct genwqe_file *cfile;
+
+ spin_lock_irqsave(&cd->file_lock, flags);
+ list_for_each_entry(cfile, &cd->file_list, list) {
+ if (cfile->async_queue)
+ kill_fasync(&cfile->async_queue, sig, POLL_HUP);
+ files++;
+ }
+ spin_unlock_irqrestore(&cd->file_lock, flags);
+ return files;
+}
+
+static int genwqe_force_sig(struct genwqe_dev *cd, int sig)
+{
+ unsigned int files = 0;
+ unsigned long flags;
+ struct genwqe_file *cfile;
+
+ spin_lock_irqsave(&cd->file_lock, flags);
+ list_for_each_entry(cfile, &cd->file_list, list) {
+ force_sig(sig, cfile->owner);
+ files++;
+ }
+ spin_unlock_irqrestore(&cd->file_lock, flags);
+ return files;
+}
+
+/**
+ * @brief file operation function
+ *
+ * This function is executed whenever an application calls
+ * open("/dev/genwqe",..)
+ *
+ * @param inode file system informations
+ * @param filp file handle
+ *
+ * @return 0 if successful or <0 if errors
+ */
+static int genwqe_open(struct inode *inode, struct file *filp)
+{
+ struct genwqe_dev *cd;
+ struct genwqe_file *cfile;
+ struct pci_dev *pci_dev;
+
+ cfile = kzalloc(sizeof(*cfile), GFP_KERNEL);
+ if (cfile == NULL)
+ return -ENOMEM;
+
+ cd = container_of(inode->i_cdev, struct genwqe_dev, cdev_genwqe);
+ pci_dev = cd->pci_dev;
+ cfile->cd = cd;
+ cfile->filp = filp;
+ cfile->client = NULL;
+
+ spin_lock_init(&cfile->map_lock); /* list of raw memory allocations */
+ INIT_LIST_HEAD(&cfile->map_list);
+
+ spin_lock_init(&cfile->pin_lock); /* list of user pinned memory */
+ INIT_LIST_HEAD(&cfile->pin_list);
+
+ filp->private_data = cfile;
+
+ genwqe_add_file(cd, cfile);
+ return 0;
+}
+
+/**
+ * @brief Setup process to receive SIGIO.
+ * @param fd file descriptor
+ * @param filp file handle
+ * @param mode file mode
+ *
+ * Sending a signal is working as following:
+ *
+ * if (cdev->async_queue)
+ * kill_fasync(&cdev->async_queue, SIGIO, POLL_IN);
+ *
+ * @note Some devices also implement asynchronous notification to
+ * indicate when the device can be written; in this case, of course,
+ * kill_fasync must be called with a mode of POLL_OUT.
+ */
+static int genwqe_fasync(int fd, struct file *filp, int mode)
+{
+ struct genwqe_file *cdev = (struct genwqe_file *)filp->private_data;
+ return fasync_helper(fd, filp, mode, &cdev->async_queue);
+}
+
+
+/**
+ * @brief file operation function.
+ * this function is executed whenever an application calls 'close(fd_genwqe)'
+ *
+ * @param inode file system informations
+ * @param filp file handle
+ *
+ * @return always 0
+ */
+static int genwqe_release(struct inode *inode, struct file *filp)
+{
+ struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
+ struct genwqe_dev *cd = cfile->cd;
+
+ /* there must be no entries in these lists! */
+ genwqe_remove_mappings(cfile);
+ genwqe_remove_pinnings(cfile);
+
+ /* remove this filp from the asynchronously notified filp's */
+ genwqe_fasync(-1, filp, 0);
+
+ /**
+ * For this to work we must not release cd when this cfile is
+ * not yet released, otherwise the list entry is invalid,
+ * because the list itself gets reinstantiated!
+ */
+ genwqe_del_file(cd, cfile);
+ kfree(cfile);
+ return 0;
+}
+
+static void genwqe_vma_open(struct vm_area_struct *vma)
+{
+ /* nothing ... */
+}
+
+/**
+ * This function is called each time when vma is unmapped.
+ */
+static void genwqe_vma_close(struct vm_area_struct *vma)
+{
+ unsigned long vsize = vma->vm_end - vma->vm_start;
+ struct inode *inode = vma->vm_file->f_dentry->d_inode;
+ struct dma_mapping *dma_map;
+ struct genwqe_dev *cd = container_of(inode->i_cdev, struct genwqe_dev,
+ cdev_genwqe);
+ struct pci_dev *pci_dev = cd->pci_dev;
+ dma_addr_t d_addr = 0;
+ struct genwqe_file *cfile = vma->vm_private_data;
+
+ dma_map = __genwqe_search_mapping(cfile, vma->vm_start, vsize,
+ &d_addr, NULL);
+ if (dma_map == NULL) {
+ dev_err(&pci_dev->dev,
+ " [%s] err: mapping not found: v=%lx, p=%lx s=%lx\n",
+ __func__, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT,
+ vsize);
+ return;
+ }
+ __genwqe_del_mapping(cfile, dma_map);
+ __genwqe_free_consistent(cd, dma_map->size,
+ dma_map->k_vaddr,
+ dma_map->dma_addr);
+ kfree(dma_map);
+}
+
+static struct vm_operations_struct genwqe_vma_ops = {
+ .open = genwqe_vma_open,
+ .close = genwqe_vma_close,
+};
+
+/**
+ * We use mmap() to allocate contignous buffers used for DMA
+ * transfers. After the buffer is allocated we remap it to user-space
+ * and remember a reference to our dma_mapping data structure, where
+ * we store the associated DMA address and allocated size.
+ *
+ * When we receive a DDCB execution request with the ATS bits set to
+ * plain buffer, we lookup our dma_mapping list to find the
+ * corresponding DMA address for the associated user-space address.
+ */
+static int genwqe_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ int rc;
+ unsigned long pfn, vsize = vma->vm_end - vma->vm_start;
+ struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
+ struct genwqe_dev *cd = cfile->cd;
+ struct dma_mapping *dma_map;
+
+ if (vsize == 0)
+ return -EINVAL;
+
+ if (get_order(vsize) > MAX_ORDER)
+ return -ENOMEM;
+
+ dma_map = kzalloc(sizeof(struct dma_mapping), GFP_ATOMIC);
+ if (dma_map == NULL)
+ return -ENOMEM;
+
+ genwqe_mapping_init(dma_map, GENWQE_MAPPING_RAW);
+ dma_map->u_vaddr = (void *)vma->vm_start;
+ dma_map->size = vsize;
+ dma_map->nr_pages = DIV_ROUND_UP(vsize, PAGE_SIZE);
+ dma_map->k_vaddr = __genwqe_alloc_consistent(cd, vsize,
+ &dma_map->dma_addr);
+ if (dma_map->k_vaddr == NULL) {
+ rc = -ENOMEM;
+ goto free_dma_map;
+ }
+
+ if (capable(CAP_SYS_ADMIN) && (vsize > sizeof(dma_addr_t)))
+ *(dma_addr_t *)dma_map->k_vaddr = dma_map->dma_addr;
+
+ pfn = virt_to_phys(dma_map->k_vaddr) >> PAGE_SHIFT;
+ rc = remap_pfn_range(vma,
+ vma->vm_start,
+ pfn,
+ vsize,
+ vma->vm_page_prot);
+ if (rc != 0) {
+ rc = -EFAULT;
+ goto free_dma_mem;
+ }
+
+ vma->vm_private_data = cfile;
+ vma->vm_ops = &genwqe_vma_ops;
+ __genwqe_add_mapping(cfile, dma_map);
+
+ return 0;
+
+ free_dma_mem:
+ __genwqe_free_consistent(cd, dma_map->size,
+ dma_map->k_vaddr,
+ dma_map->dma_addr);
+ free_dma_map:
+ kfree(dma_map);
+ return rc;
+}
+
+/**
+ * @brief excute flash update (write image or CVPD)
+ * the complete image is loaded into a page aligned buffer
+ * in user space. A scatter list of this buffer must be
+ * established and provided to the DMA controller via DDCB
+ *
+ * qparam cd genwqe device
+ * @param load details about image load
+ *
+ * @return 0 if successful
+ */
+
+#define FLASH_BLOCK 0x40000 /* we use 256k blocks */
+
+static int do_flash_update(struct genwqe_file *cfile,
+ struct chip_bitstream *load)
+{
+ int rc = 0;
+ int blocks_to_flash;
+ u64 dma_addr, flash = 0;
+ size_t tocopy = 0;
+ u8 __user *buf, *xbuf;
+ u32 crc;
+ u8 cmdopts;
+ struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if ((load->size & 0x3) != 0) {
+ dev_err(&pci_dev->dev,
+ "err: buf %d bytes not 4 bytes aligned!\n",
+ load->size);
+ return -EINVAL;
+ }
+ if (((unsigned long)(load->pdata) & ~PAGE_MASK) != 0) {
+ dev_err(&pci_dev->dev,
+ "err: buf is not page aligned!\n");
+ return -EINVAL;
+ }
+
+ /* FIXME Bits have changed for new service layer! */
+ switch ((char)load->partition) {
+ case '0':
+ cmdopts = 0x14; break; /* download/erase_first/part_0 */
+ case '1':
+ cmdopts = 0x1C; break; /* download/erase_first/part_1 */
+ case 'v': /* cmdopts = 0x0c (VPD) */
+ default:
+ dev_err(&pci_dev->dev,
+ "err: invalid partition %02x!\n", load->partition);
+ return -EINVAL;
+ }
+ dev_info(&pci_dev->dev,
+ "[%s] start flash update UID: 0x%x size: %u bytes part: %c\n",
+ __func__, load->uid, load->size, (char)load->partition);
+
+ buf = load->pdata;
+ xbuf = __genwqe_alloc_consistent(cd, FLASH_BLOCK, &dma_addr);
+ if (xbuf == NULL) {
+ dev_err(&pci_dev->dev, "err: no memory\n");
+ return -ENOMEM;
+ }
+
+ blocks_to_flash = load->size / FLASH_BLOCK;
+ while (load->size) {
+ struct genwqe_ddcb_cmd *req;
+
+ /**
+ * We must be 4 byte aligned. Buffer must be 0 appened
+ * to have defined values when calculating CRC.
+ */
+ tocopy = min_t(size_t, load->size, FLASH_BLOCK);
+
+ rc = copy_from_user(xbuf, buf, tocopy);
+ if (rc) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy all data rc=%d\n", rc);
+ goto free_buffer;
+ }
+ crc = genwqe_crc32(xbuf, tocopy, 0xffffffff);
+
+ dev_info(&pci_dev->dev,
+ "[%s] DMA: 0x%llx CRC: %08x SZ: %ld %d\n",
+ __func__, dma_addr, crc, tocopy, blocks_to_flash);
+
+ /* prepare DDCB for SLU process */
+ req = ddcb_requ_alloc();
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto free_buffer;
+ }
+
+ req->cmd = SLCMD_MOVE_FLASH;
+ req->cmdopts = cmdopts;
+
+ /* prepare invariant values (see genwqe spec: 9.6.4) */
+
+ /* FIXME This pointer casting looks kind of ugly to
+ me. Maybe it would be a good idea to define a DDCB
+ union with the appliation specific fields named and
+ typed nicely? And we pass the generic request to
+ the genwqe_card functions? */
+ if (genwqe_get_slu_id(cd) <= 0x2) {
+ *(u64 *)&req->__asiv[0] = cpu_to_be64(dma_addr);
+ *(u64 *)&req->__asiv[8] = cpu_to_be64(tocopy);
+ *(u64 *)&req->__asiv[16] = cpu_to_be64(flash);
+ *(u32 *)&req->__asiv[24] = cpu_to_be32(0);
+ req->__asiv[24] = load->uid;
+ *(u32 *)&req->__asiv[28] = cpu_to_be32(crc);
+
+ /* for simulation only */
+ *(u64 *)&req->__asiv[88] = cpu_to_be64(load->slu_id);
+ *(u64 *)&req->__asiv[96] = cpu_to_be64(load->app_id);
+ req->asiv_length = 32; /* bytes included in crc calc */
+ } else { /* setup DDCB for ATS architecture */
+ *(u64 *)&req->asiv[0] = cpu_to_be64(dma_addr);
+ *(u32 *)&req->asiv[8] = cpu_to_be32(tocopy);
+ *(u32 *)&req->asiv[12] = cpu_to_be32(0); /* resvd */
+ *(u64 *)&req->asiv[16] = cpu_to_be64(flash);
+ *(u32 *)&req->asiv[24] = cpu_to_be32(load->uid<<24);
+ *(u32 *)&req->asiv[28] = cpu_to_be32(crc);
+
+ /* for simulation only */
+ *(u64 *)&req->asiv[80] = cpu_to_be64(load->slu_id);
+ *(u64 *)&req->asiv[88] = cpu_to_be64(load->app_id);
+
+ req->ats = cpu_to_be64(0x4ULL << 44); /* Rd only */
+ req->asiv_length = 40; /* bytes included in crc calc */
+ }
+ req->asv_length = 8;
+
+ /* For Genwqe5 we get back the calculated CRC */
+ *(u64 *)&req->asv[0] = 0ULL; /* 0x80 */
+
+ rc = __genwqe_execute_raw_ddcb(cd, req);
+
+ load->retc = req->retc;
+ load->attn = req->attn;
+ load->progress = req->progress;
+
+ if (rc < 0) {
+ dev_err(&pci_dev->dev,
+ " [%s] DDCB returned (RETC=%x ATTN=%x "
+ "PROG=%x rc=%d)\n", __func__, req->retc,
+ req->attn, req->progress, rc);
+
+ ddcb_requ_free(req);
+ goto free_buffer;
+ }
+
+ if (req->retc != DDCB_RETC_COMPLETE) {
+ dev_info(&pci_dev->dev,
+ " [%s] DDCB returned (RETC=%x ATTN=%x "
+ "PROG=%x)\n", __func__, req->retc,
+ req->attn, req->progress);
+
+ rc = -EIO;
+ ddcb_requ_free(req);
+ goto free_buffer;
+ }
+
+ load->size -= tocopy;
+ flash += tocopy;
+ buf += tocopy;
+ blocks_to_flash--;
+ ddcb_requ_free(req);
+ }
+
+ free_buffer:
+ __genwqe_free_consistent(cd, FLASH_BLOCK, xbuf, dma_addr);
+ return rc;
+}
+
+static int do_flash_read(struct genwqe_file *cfile,
+ struct chip_bitstream *load)
+{
+ int rc, blocks_to_flash;
+ u64 dma_addr, flash = 0;
+ size_t tocopy = 0;
+ u8 __user *buf, *xbuf;
+ u8 cmdopts;
+ struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ struct genwqe_ddcb_cmd *cmd;
+
+ if ((load->size & 0x3) != 0) {
+ dev_err(&pci_dev->dev,
+ "err: buf size %d bytes not 4 bytes aligned!\n",
+ load->size);
+ return -EINVAL;
+ }
+ if (((unsigned long)(load->pdata) & ~PAGE_MASK) != 0) {
+ dev_err(&pci_dev->dev, "err: buf is not page aligned!\n");
+ return -EINVAL;
+ }
+
+ /* FIXME Bits have changed for new service layer! */
+ switch ((char)load->partition) {
+ case '0':
+ cmdopts = 0x12; break; /* upload/part_0 */
+ case '1':
+ cmdopts = 0x1A; break; /* upload/part_1 */
+ case 'v':
+ default:
+ dev_err(&pci_dev->dev,
+ "err: invalid partition %02x!\n", load->partition);
+ return -EINVAL;
+ }
+ dev_info(&pci_dev->dev,
+ "[%s] start flash read UID: 0x%x size: %u bytes part: %c\n",
+ __func__, load->uid, load->size, (char)load->partition);
+
+ buf = load->pdata;
+ xbuf = __genwqe_alloc_consistent(cd, FLASH_BLOCK, &dma_addr);
+ if (xbuf == NULL) {
+ dev_err(&pci_dev->dev, "err: no memory\n");
+ return -ENOMEM;
+ }
+
+ blocks_to_flash = load->size / FLASH_BLOCK;
+ while (load->size) {
+ /**
+ * We must be 4 byte aligned. Buffer must be 0 appened
+ * to have defined values when calculating CRC.
+ */
+ tocopy = min_t(size_t, load->size, FLASH_BLOCK);
+
+ dev_info(&pci_dev->dev,
+ "[%s] DMA: 0x%llx SZ: %ld %d\n",
+ __func__, dma_addr, tocopy, blocks_to_flash);
+
+ /* prepare DDCB for SLU process */
+ cmd = ddcb_requ_alloc();
+ if (cmd == NULL) {
+ rc = -ENOMEM;
+ goto free_buffer;
+ }
+ cmd->cmd = SLCMD_MOVE_FLASH;
+ cmd->cmdopts = cmdopts;
+
+ /* prepare invariant values (see genwqe spec: 9.6.4) */
+
+ /* FIXME This pointer casting looks kind of ugly to
+ me. Maybe it would be a good idea to define a DDCB
+ union with the appliation specific fields named and
+ typed nicely? And we pass the generic request to
+ the genwqe_card functions? */
+ if (genwqe_get_slu_id(cd) <= 0x2) {
+ *(u64 *)&cmd->__asiv[0] = cpu_to_be64(dma_addr);
+ *(u64 *)&cmd->__asiv[8] = cpu_to_be64(tocopy);
+ *(u64 *)&cmd->__asiv[16] = cpu_to_be64(flash);
+ *(u32 *)&cmd->__asiv[24] = cpu_to_be32(0);
+ cmd->__asiv[24] = load->uid;
+ *(u32 *)&cmd->__asiv[28] = cpu_to_be32(0) /* CRC */;
+ cmd->asiv_length = 32; /* bytes included in crc calc */
+ } else { /* setup DDCB for ATS architecture */
+ *(u64 *)&cmd->asiv[0] = cpu_to_be64(dma_addr);
+ *(u32 *)&cmd->asiv[8] = cpu_to_be32(tocopy);
+ *(u32 *)&cmd->asiv[12] = cpu_to_be32(0); /* resvd */
+ *(u64 *)&cmd->asiv[16] = cpu_to_be64(flash);
+ *(u32 *)&cmd->asiv[24] = cpu_to_be32(load->uid<<24);
+ *(u32 *)&cmd->asiv[28] = cpu_to_be32(0); /* CRC */
+ cmd->ats = cpu_to_be64(0x5ULL << 44); /* rd/wr */
+ cmd->asiv_length = 40; /* bytes included in crc calc */
+ }
+ cmd->asv_length = 8;
+
+ /* we only get back the calculated CRC */
+ *(u64 *)&cmd->asv[0] = 0ULL; /* 0x80 */
+
+ rc = __genwqe_execute_raw_ddcb(cd, cmd);
+
+ load->retc = cmd->retc;
+ load->attn = cmd->attn;
+ load->progress = cmd->progress;
+
+ if ((rc < 0) && (rc != -EBADMSG)) {
+ dev_err(&pci_dev->dev,
+ " [%s] DDCB returned (RETC=%x ATTN=%x "
+ "PROG=%x rc=%d)\n", __func__, cmd->retc,
+ cmd->attn, cmd->progress, rc);
+ ddcb_requ_free(cmd);
+ goto free_buffer;
+ }
+
+ rc = copy_to_user(buf, xbuf, tocopy);
+ if (rc) {
+ dev_err(&pci_dev->dev,
+ " [%s] copy data to user failed rc=%d\n",
+ __func__, rc);
+ rc = -EIO;
+ ddcb_requ_free(cmd);
+ goto free_buffer;
+ }
+
+ /* We know that we can get retc 0x104 with CRC err */
+ if (((cmd->retc == DDCB_RETC_FAULT) &&
+ (cmd->attn != 0x02)) || /* Normally ignore CRC error */
+ ((cmd->retc == DDCB_RETC_COMPLETE) &&
+ (cmd->attn != 0x00))) { /* Everything was fine */
+ dev_err(&pci_dev->dev,
+ " [%s] DDCB returned (RETC=%x ATTN=%x "
+ "PROG=%x rc=%d)\n", __func__, cmd->retc,
+ cmd->attn, cmd->progress, rc);
+ genwqe_hexdump(pci_dev, buf, min_t(int, 128, tocopy));
+ rc = -EIO;
+ ddcb_requ_free(cmd);
+ goto free_buffer;
+ }
+
+ load->size -= tocopy;
+ flash += tocopy;
+ buf += tocopy;
+ blocks_to_flash--;
+ ddcb_requ_free(cmd);
+ }
+ rc = 0;
+
+ free_buffer:
+ __genwqe_free_consistent(cd, FLASH_BLOCK, xbuf, dma_addr);
+ return rc;
+}
+
+static int genwqe_get_dbg_data_size(struct genwqe_dev *cd, unsigned long arg)
+{
+ struct genwqe_dbg_data d;
+
+ if (copy_from_user(&d, (void *)arg, sizeof(d)))
+ return -EFAULT;
+
+ if (d.type < 0 || d.type >= GENWQE_DBG_UNITS)
+ return -EINVAL;
+
+ d.entries = cd->ffdc[d.type].entries;
+
+ if (copy_to_user((void *)arg, &d, sizeof(d)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int genwqe_get_dbg_curr_data(struct genwqe_dev *cd, unsigned long arg)
+{
+ struct genwqe_dbg_data d;
+ struct genwqe_dbg_data *d_ptr = (void *)arg;
+ struct genwqe_reg *regs;
+
+ if (copy_from_user(&d, (void *)arg, sizeof(d)))
+ return -EFAULT;
+
+ if ((d.type < 0) || (d.type >= GENWQE_DBG_UNITS))
+ return -EINVAL;
+
+ if (d.entries == 0)
+ return 0; /* nothing to do */
+
+ regs = kzalloc(d.entries * sizeof(*regs), GFP_ATOMIC);
+ if (regs == NULL)
+ return -ENOMEM;
+
+ /* Halt the traps while dumping FFDC. */
+ genwqe_stop_traps(cd);
+
+ switch (d.type) {
+ case GENWQE_DBG_UNIT0:
+ case GENWQE_DBG_UNIT1:
+ case GENWQE_DBG_UNIT2:
+ case GENWQE_DBG_UNIT3:
+ case GENWQE_DBG_UNIT4:
+ case GENWQE_DBG_UNIT5:
+ case GENWQE_DBG_UNIT6:
+ case GENWQE_DBG_UNIT7:
+ genwqe_ffdc_buff_read(cd, ffdcid_to_unitid[d.type],
+ regs, d.entries);
+ break;
+ case GENWQE_DBG_REGS:
+ genwqe_read_ffdc_regs(cd, regs, d.entries, 1);
+ break;
+ default:
+ break;
+ }
+
+ /* Restart the traps. */
+ genwqe_start_traps(cd);
+
+ if (copy_to_user(d_ptr->regs, regs,
+ d.entries * sizeof(struct genwqe_reg))) {
+ kfree(regs);
+ return -EFAULT;
+ }
+
+ kfree(regs);
+ return 0;
+}
+
+static int genwqe_get_dbg_prev_data(struct genwqe_dev *cd, unsigned long arg)
+{
+ struct genwqe_dbg_data d;
+ struct genwqe_dbg_data *d_ptr = (void *)arg;
+
+ if (copy_from_user(&d, (void *)arg, sizeof(d)))
+ return -EFAULT;
+
+ if ((d.type < 0) || (d.type >= GENWQE_DBG_UNITS))
+ return -EINVAL;
+
+ if (d.entries == 0)
+ return 0; /* nothing to do */
+
+ if (copy_to_user(d_ptr->regs,
+ cd->ffdc[d.type].regs,
+ d.entries * sizeof(struct genwqe_reg))) {
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int genwqe_pin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
+{
+ int rc;
+ struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cfile->cd->pci_dev;
+ struct dma_mapping *dma_map;
+ unsigned long map_addr;
+ unsigned long map_size;
+
+ if ((m->addr == 0x0) || (m->size == 0))
+ return -EINVAL;
+
+ map_addr = (m->addr & PAGE_MASK);
+ map_size = round_up(m->size + (m->addr & ~PAGE_MASK), PAGE_SIZE);
+
+ dbg_printk(cd, dbg_card_pinning,
+ "[%s] pinning user memory %016lx %ld bytes w=%d\n",
+ __func__, map_addr, map_size, m->direction);
+
+ dma_map = kzalloc(sizeof(struct dma_mapping), GFP_ATOMIC);
+ if (dma_map == NULL)
+ return -ENOMEM;
+
+ genwqe_mapping_init(dma_map, GENWQE_MAPPING_SGL_PINNED);
+ rc = user_vmap(cd, dma_map, (void *)map_addr, map_size, NULL);
+ if (rc != 0) {
+ dev_err(&pci_dev->dev,
+ "[%s] user_vmap rc=%d\n", __func__, rc);
+ return rc;
+ }
+
+ genwqe_add_pin(cfile, dma_map);
+ return 0;
+}
+
+static int genwqe_unpin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
+{
+ struct genwqe_dev *cd = cfile->cd;
+ struct dma_mapping *dma_map;
+ unsigned long map_addr;
+ unsigned long map_size;
+
+ if (m->addr == 0x0)
+ return -EINVAL;
+
+ map_addr = (m->addr & PAGE_MASK);
+ map_size = round_up(m->size + (m->addr & ~PAGE_MASK), PAGE_SIZE);
+
+ dbg_printk(cd, dbg_card_pinning,
+ "[%s] unpinning user memory %016lx %ld bytes\n",
+ __func__, map_addr, map_size);
+
+ dma_map = genwqe_search_pin(cfile, map_addr, map_size, NULL);
+ if (dma_map == NULL)
+ return -ENOENT;
+
+ genwqe_del_pin(cfile, dma_map);
+ user_vunmap(cd, dma_map, NULL);
+ kfree(dma_map);
+ return 0;
+}
+
+/**
+ * Remove dynamically created fixup entries, if there are
+ * any. Pinnings are not removed.
+ */
+static int ddcb_cmd_cleanup(struct genwqe_file *cfile, struct ddcb_requ *req)
+{
+ unsigned int i;
+ struct dma_mapping *dma_map;
+ struct genwqe_dev *cd = cfile->cd;
+
+ for (i = 0; i < DDCB_FIXUPS; i++) {
+ dma_map = &req->dma_mappings[i];
+
+ if (dma_mapping_used(dma_map)) {
+ __genwqe_del_mapping(cfile, dma_map);
+ user_vunmap(cd, dma_map, req);
+ }
+ if (req->sgl[i] != NULL) {
+ genwqe_free_sgl(cd, req->sgl[i],
+ req->sgl_dma_addr[i],
+ req->sgl_size[i]);
+ req->sgl[i] = NULL;
+ req->sgl_dma_addr[i] = 0x0;
+ req->sgl_size[i] = 0;
+ }
+
+ }
+ return 0;
+}
+
+/**
+ * Before the DDCB gets executed we need to handle the fixups. We
+ * replace the user-space addresses with DMA addresses or do
+ * additional setup work e.g. generating a scatter-gather list which
+ * is used to describe the memory referred to in the fixup.
+ */
+static int ddcb_cmd_fixups(struct genwqe_file *cfile, struct ddcb_requ *req)
+{
+ int rc;
+ unsigned int asiv_offs, i;
+ struct genwqe_dev *cd = cfile->cd;
+ struct genwqe_ddcb_cmd *cmd = &req->cmd;
+ struct dma_mapping *m;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ const char *type = "UNKNOWN";
+
+ for (i = 0, asiv_offs = 0x00; asiv_offs <= 0x58;
+ i++, asiv_offs += 0x08) {
+
+ u64 u_addr, d_addr;
+ u32 u_size = 0;
+ unsigned long ats_flags;
+
+ ats_flags = ATS_GET_FLAGS(be64_to_cpu(cmd->ats), asiv_offs);
+
+ switch (ats_flags) {
+
+ case ATS_TYPE_DATA: { /* nothing to do here */
+ break;
+ }
+ case ATS_TYPE_FLAT_RDWR:
+ case ATS_TYPE_FLAT_RD: {
+ u_addr = be64_to_cpu(*((u64 *)&cmd->
+ asiv[asiv_offs]));
+ u_size = be32_to_cpu(*((u32 *)&cmd->
+ asiv[asiv_offs + 0x08]));
+
+ /**
+ * No data available. Ignore u_addr in this
+ * case and set addr to 0. Hardware must not
+ * fetch the buffer.
+ */
+ if (u_size == 0x0) {
+ *((u64 *)&cmd->asiv[asiv_offs]) =
+ cpu_to_be64(0x0);
+ break;
+ }
+
+ m = __genwqe_search_mapping(cfile, u_addr, u_size,
+ &d_addr, NULL);
+ if (m == NULL) {
+ rc = -EFAULT;
+ goto err_out;
+ }
+
+ *((u64 *)&cmd->asiv[asiv_offs]) = cpu_to_be64(d_addr);
+ break;
+ }
+
+ case ATS_TYPE_SGL_RDWR:
+ case ATS_TYPE_SGL_RD: {
+ int page_offs, nr_pages, offs;
+
+ u_addr = be64_to_cpu(*((u64 *)&cmd->asiv[asiv_offs]));
+ u_size = be32_to_cpu(*((u32 *)&cmd->asiv[asiv_offs +
+ 0x08]));
+
+ /**
+ * No data available. Ignore u_addr in this
+ * case and set addr to 0. Hardware must not
+ * fetch the empty sgl.
+ */
+ if (u_size == 0x0) {
+ *((u64 *)&cmd->asiv[asiv_offs]) =
+ cpu_to_be64(0x0);
+ break;
+ }
+
+ m = genwqe_search_pin(cfile, u_addr, u_size, NULL);
+ if (m != NULL) {
+ type = "PINNING";
+ page_offs = (u_addr -
+ (u64)m->u_vaddr)/PAGE_SIZE;
+ } else {
+ type = "MAPPING";
+ m = &req->dma_mappings[i];
+
+ genwqe_mapping_init(m,
+ GENWQE_MAPPING_SGL_TEMP);
+ rc = user_vmap(cd, m, (void *)u_addr, u_size,
+ req);
+ if (rc != 0)
+ goto err_out;
+
+ __genwqe_add_mapping(cfile, m);
+ page_offs = 0;
+ }
+
+ offs = offset_in_page(u_addr);
+ nr_pages = DIV_ROUND_UP(offs + u_size, PAGE_SIZE);
+
+ dbg_printk(cd, dbg_card_pinning,
+ "[%s] %s for %016llx/%08x: "
+ "addr=%p/size=%08x page_start=%d offs=%08x "
+ "num_pages=%d new/n_pages=%d\n",
+ __func__, type, u_addr, u_size, m->u_vaddr,
+ m->size, page_offs, offs, m->nr_pages,
+ nr_pages);
+
+ /* create genwqe style scatter gather list */
+ req->sgl[i] = genwqe_alloc_sgl(cd, m->nr_pages,
+ &req->sgl_dma_addr[i],
+ &req->sgl_size[i]);
+ if (req->sgl[i] == NULL) {
+ rc = -ENOMEM;
+ goto err_out;
+ }
+ genwqe_setup_sgl(cd, offs, u_size,
+ req->sgl[i],
+ req->sgl_dma_addr[i],
+ req->sgl_size[i],
+ m->dma_list,
+ page_offs,
+ nr_pages);
+
+ *((u64 *)&cmd->asiv[asiv_offs]) =
+ cpu_to_be64(req->sgl_dma_addr[i]);
+
+ break;
+ }
+ default:
+ dev_err(&pci_dev->dev,
+ "[%s] err: invalid ATS flags %01lx\n",
+ __func__, ats_flags);
+ rc = -EINVAL;
+ goto err_out;
+ }
+ }
+ return 0;
+
+ err_out:
+ dev_err(&pci_dev->dev, "[%s] err: rc=%d\n", __func__, rc);
+ ddcb_cmd_cleanup(cfile, req);
+ return rc;
+}
+
+/**
+ * Execute DDCB using userspace address fixups. The code will build up
+ * the translation tables or lookup the contignous memory allocation
+ * table to find the right translations and DMA addresses.
+ */
+int genwqe_execute_ddcb(struct genwqe_file *cfile, struct genwqe_ddcb_cmd *cmd)
+{
+ int rc;
+ struct genwqe_dev *cd = cfile->cd;
+ struct ddcb_requ *req = container_of(cmd, struct ddcb_requ, cmd);
+
+ rc = ddcb_cmd_fixups(cfile, req);
+ if (rc != 0) {
+ dbg_printk(cd, dbg_card_ddcb,
+ "[%s] err: fixups rc=%d\n", __func__, rc);
+ return rc;
+ }
+ rc = __genwqe_execute_raw_ddcb(cd, cmd);
+
+ ddcb_cmd_cleanup(cfile, req);
+ return rc;
+}
+
+static int do_execute_ddcb(struct genwqe_file *cfile,
+ unsigned long arg, int raw)
+{
+ int rc;
+ struct genwqe_ddcb_cmd *cmd;
+ struct ddcb_requ *req;
+ struct genwqe_dev *cd = cfile->cd;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ cmd = ddcb_requ_alloc();
+ if (cmd == NULL)
+ return -ENOMEM;
+
+ req = container_of(cmd, struct ddcb_requ, cmd);
+
+ if (copy_from_user(cmd, (void * __user)arg, sizeof(*cmd))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params from user\n");
+ ddcb_requ_free(cmd);
+ return -EFAULT;
+ }
+
+ if (!raw)
+ rc = genwqe_execute_ddcb(cfile, cmd);
+ else
+ rc = __genwqe_execute_raw_ddcb(cd, cmd);
+
+ /* Copy back only the modifed fields. Do not copy ASIV
+ back since the copy got modified by the driver. */
+ if (copy_to_user((void * __user)arg, cmd,
+ sizeof(*cmd) - DDCB_ASIV_LENGTH)) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params to user\n");
+ ddcb_requ_free(cmd);
+ return -EFAULT;
+ }
+
+ ddcb_requ_free(cmd);
+ return rc;
+}
+
+/**
+ * @brief fop function: IO control
+ *
+ * @param filp file handle
+ * @param cmd command identifier (passed from user)
+ * @param arg argument (passed from user)
+ *
+ * @return -
+ */
+static long genwqe_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ int rc = 0;
+ struct genwqe_file *cfile = (struct genwqe_file *)filp->private_data;
+ struct genwqe_dev *cd = cfile->cd;
+ struct regs_io __user *io;
+ u64 u64_val;
+ u32 reg_offs, u32_val;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (_IOC_TYPE(cmd) != GENWQE_IOC_CODE) {
+ dev_err(&pci_dev->dev, "err: ioctl code does not match!\n");
+ return -EINVAL;
+ }
+
+ switch (cmd) {
+
+ /** FFDC gathering functionality ************************************/
+ case GENWQE_GET_DBG_DATA_SIZE:
+ return genwqe_get_dbg_data_size(cd, arg);
+
+ case GENWQE_GET_DBG_CURR_DATA:
+ return genwqe_get_dbg_curr_data(cd, arg);
+
+ case GENWQE_GET_DBG_PREV_DATA:
+ return genwqe_get_dbg_prev_data(cd, arg);
+
+ case GENWQE_GET_CARD_STATE:
+ put_user(cd->card_state, (enum genwqe_card_state *)arg);
+ return 0;
+
+ /** Register access *************************************************/
+ case GENWQE_READ_REG64: {
+ io = (struct regs_io * __user)arg;
+
+ if (get_user(reg_offs, &io->num)) {
+ dev_err(&pci_dev->dev, "err: reg read64\n");
+ return -EFAULT;
+ }
+ if ((reg_offs >= cd->mmio_len) || (reg_offs & 0x7))
+ return -EINVAL;
+
+ u64_val = __genwqe_readq(cd, reg_offs);
+ put_user(u64_val, &io->val64);
+ return 0;
+ }
+
+ case GENWQE_WRITE_REG64: {
+ io = (struct regs_io * __user)arg;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
+ return -EPERM;
+
+ if (get_user(reg_offs, &io->num)) {
+ dev_err(&pci_dev->dev, "err: reg write64\n");
+ return -EFAULT;
+ }
+ if ((reg_offs >= cd->mmio_len) || (reg_offs & 0x7))
+ return -EINVAL;
+
+ if (get_user(u64_val, &io->val64)) {
+ dev_err(&pci_dev->dev, "err: reg write64\n");
+ return -EFAULT;
+ }
+ __genwqe_writeq(cd, reg_offs, u64_val);
+ return 0;
+ }
+
+ case GENWQE_READ_REG32: {
+ io = (struct regs_io * __user)arg;
+
+ if (get_user(reg_offs, &io->num)) {
+ dev_err(&pci_dev->dev, "err: reg read32\n");
+ return -EFAULT;
+ }
+ if ((reg_offs >= cd->mmio_len) || (reg_offs & 0x3))
+ return -EINVAL;
+
+ u32_val = __genwqe_readl(cd, reg_offs);
+ put_user(u32_val, &io->val32);
+ return 0;
+ }
+
+ case GENWQE_WRITE_REG32: {
+ io = (struct regs_io * __user)arg;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
+ return -EPERM;
+
+ if (get_user(reg_offs, &io->num)) {
+ dev_err(&pci_dev->dev, "err: reg write32\n");
+ return -EFAULT;
+ }
+ if ((reg_offs >= cd->mmio_len) || (reg_offs & 0x3))
+ return -EINVAL;
+
+ if (get_user(u32_val, &io->val32)) {
+ dev_err(&pci_dev->dev, "err: reg write32\n");
+ return -EFAULT;
+ }
+ __genwqe_writel(cd, reg_offs, u32_val);
+ return 0;
+ }
+
+ /* Flash update/reading **********************************************/
+ case GENWQE_SLU_UPDATE: {
+ struct chip_bitstream load;
+
+ if (!genwqe_is_privileged(cd))
+ return -EPERM;
+
+ if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
+ return -EPERM;
+
+ if (copy_from_user(&load, (void * __user)arg, sizeof(load))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params from user\n");
+ return -EFAULT;
+ }
+ rc = do_flash_update(cfile, &load);
+
+ if (copy_to_user((void *)arg, &load, sizeof(load))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params to user\n");
+ return -EFAULT;
+ }
+ dev_info(&pci_dev->dev, "[%s] rc=%d\n", __func__, rc);
+ return rc;
+ }
+
+ case GENWQE_SLU_READ: {
+ struct chip_bitstream load;
+
+ if (!genwqe_is_privileged(cd))
+ return -EPERM;
+
+ if (genwqe_flash_readback_fails(cd))
+ return -ENOSPC; /* known to fail for old versions */
+
+ if (copy_from_user(&load, (void * __user)arg, sizeof(load))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params from user\n");
+ return -EFAULT;
+ }
+ rc = do_flash_read(cfile, &load);
+
+ if (copy_to_user((void *)arg, &load, sizeof(load))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params to user\n");
+ return -EFAULT;
+ }
+ dev_info(&pci_dev->dev, "[%s] rc=%d\n", __func__, rc);
+ return rc;
+ }
+
+ /** memory pinning and unpinning ************************************/
+ case GENWQE_PIN_MEM: {
+ struct genwqe_mem m;
+
+ if (copy_from_user(&m, (void * __user)arg, sizeof(m))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params from user\n");
+ return -EFAULT;
+ }
+ return genwqe_pin_mem(cfile, &m);
+ }
+
+ case GENWQE_UNPIN_MEM: {
+ struct genwqe_mem m;
+
+ if (copy_from_user(&m, (void * __user)arg, sizeof(m))) {
+ dev_err(&pci_dev->dev,
+ "err: could not copy params from user\n");
+ return -EFAULT;
+ }
+ return genwqe_unpin_mem(cfile, &m);
+ }
+
+ /** launch an DDCB and wait for completion **************************/
+ case GENWQE_EXECUTE_DDCB:
+ return do_execute_ddcb(cfile, arg, 0);
+
+ case GENWQE_EXECUTE_RAW_DDCB: {
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ dev_err(&pci_dev->dev,
+ "err: must be superuser execute raw DDCB!\n");
+ return -EPERM;
+ }
+ return do_execute_ddcb(cfile, arg, 1);
+ }
+
+ default:
+ pr_err("unknown ioctl %x/%lx**\n", cmd, arg);
+ return -EINVAL;
+ }
+
+ return rc;
+}
+
+static const struct file_operations genwqe_fops = {
+ .owner = THIS_MODULE,
+ .open = genwqe_open,
+ .fasync = genwqe_fasync,
+ .mmap = genwqe_mmap,
+ .unlocked_ioctl = genwqe_ioctl,
+ .release = genwqe_release,
+};
+
+static int genwqe_device_initialized(struct genwqe_dev *cd)
+{
+ return (cd->dev != NULL);
+}
+
+/**
+ * @brief create and configure genwqe char device
+ *
+ * This function must be called before we create any more genwqe
+ * character devices, because it is allocating the major and minor
+ * number which are supposed to be used by the client drivers.
+ *
+ * @param cd genwqe device descriptor
+ */
+int genwqe_device_create(struct genwqe_dev *cd)
+{
+ int rc;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ /**
+ * Here starts the individual setup per client. It must
+ * initialize its own cdev data structure with its own fops.
+ * The appropriate devnum needs to be created. The ranges must
+ * not overlap.
+ */
+ rc = alloc_chrdev_region(&cd->devnum_genwqe, 0,
+ GENWQE_MAX_MINOR, GENWQE_DEVNAME);
+ if (rc < 0) {
+ dev_err(&pci_dev->dev, "err: alloc_chrdev_region failed\n");
+ goto err_dev;
+ }
+
+ cdev_init(&cd->cdev_genwqe, &genwqe_fops);
+ cd->cdev_genwqe.owner = THIS_MODULE;
+
+ rc = cdev_add(&cd->cdev_genwqe, cd->devnum_genwqe, 1);
+ if (rc < 0) {
+ dev_err(&pci_dev->dev, "err: cdev_add failed\n");
+ goto err_add;
+ }
+
+ /**
+ * Finally the device in /dev/... must be created. The rule is
+ * to use card%d_clientname for each created device.
+ */
+ cd->dev = device_create(cd->class_genwqe, &cd->pci_dev->dev,
+ cd->devnum_genwqe, NULL,
+ GENWQE_DEVNAME "%u_card", cd->card_idx);
+ if (cd->dev == NULL) {
+ rc = -ENODEV;
+ goto err_cdev;
+ }
+ dev_set_drvdata(cd->dev, cd);
+
+ rc = create_card_sysfs(cd);
+ if (rc != 0)
+ goto err_sysfs;
+
+ return 0;
+
+ err_sysfs:
+ device_destroy(cd->class_genwqe, cd->devnum_genwqe);
+ err_cdev:
+ cdev_del(&cd->cdev_genwqe);
+ err_add:
+ unregister_chrdev_region(cd->devnum_genwqe, GENWQE_MAX_MINOR);
+ err_dev:
+ cd->dev = NULL;
+ return rc;
+}
+
+static int genwqe_inform_and_stop_processes(struct genwqe_dev *cd)
+{
+ int rc;
+ unsigned int i;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (!genwqe_open_files(cd))
+ return 0;
+
+ dev_warn(&pci_dev->dev,
+ "[%s] send SIGIO and wait ...\n", __func__);
+
+ rc = genwqe_kill_fasync(cd, SIGIO);
+ if (rc > 0) {
+ /* give kill_timeout seconds to close file descriptors ... */
+ for (i = 0; (i < genwqe_kill_timeout) &&
+ genwqe_open_files(cd); i++) {
+ dev_info(&pci_dev->dev, " %d sec ...", i);
+
+ cond_resched();
+ msleep(1000);
+ }
+
+ /* if no open files we can safely continue, else ... */
+ if (!genwqe_open_files(cd))
+ return 0;
+
+ dev_warn(&pci_dev->dev,
+ "[%s] send SIGKILL and wait ...\n", __func__);
+
+ rc = genwqe_force_sig(cd, SIGKILL); /* force terminate */
+ if (rc) {
+ /* Give kill_timout more seconds to end processes */
+ for (i = 0; (i < genwqe_kill_timeout) &&
+ genwqe_open_files(cd); i++) {
+ dev_warn(&pci_dev->dev, " %d sec ...", i);
+
+ cond_resched();
+ msleep(1000);
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * @brief remove genwqe's char device
+ *
+ * This function must be called after the client devices are removed
+ * because it will free the major/minor number range for the genwqe
+ * drivers.
+ *
+ * @note This function must be robust enough to be called twice.
+ */
+int genwqe_device_remove(struct genwqe_dev *cd)
+{
+ int rc;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (!genwqe_device_initialized(cd))
+ return 1;
+
+ genwqe_inform_and_stop_processes(cd);
+
+ /**
+ * FIXME We currently do wait until all filedescriptors are
+ * closed. This leads to a problem when we abort the
+ * application which will decrease this reference from
+ * 1/unused to 0/illegal and not from 2/used 1/empty.
+ */
+ /* FIXME Temp workaround to keep code working for old test-systems */
+
+ rc = atomic_read(&cd->cdev_genwqe.kobj.kref.refcount);
+ if (rc != 1) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: cdev_genwqe...refcount=%d\n", __func__, rc);
+ panic("Fatal err: cannot free resources with pending references!");
+ }
+
+ remove_card_sysfs(cd);
+ device_destroy(cd->class_genwqe, cd->devnum_genwqe);
+ cdev_del(&cd->cdev_genwqe);
+ unregister_chrdev_region(cd->devnum_genwqe, GENWQE_MAX_MINOR);
+ cd->dev = NULL;
+
+ return 0;
+}
diff --git a/drivers/misc/genwqe/card_sysfs.c b/drivers/misc/genwqe/card_sysfs.c
new file mode 100644
index 0000000..2a3ca37
--- /dev/null
+++ b/drivers/misc/genwqe/card_sysfs.c
@@ -0,0 +1,645 @@
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Sysfs interfaces for the GenWQE card. There are attributes to query
+ * the version of the bitstream as well as some for the
+ * driver. Additionally there are some attributes which help to debug
+ * potential problems.
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+
+#include "card_base.h"
+#include "card_ddcb.h"
+
+static const char * const genwqe_types[] = {
+ [GENWQE_TYPE_ALTERA_230] = "GenWQE4-230",
+ [GENWQE_TYPE_ALTERA_530] = "GenWQE4-530",
+ [GENWQE_TYPE_ALTERA_A4] = "GenWQE5-A4",
+ [GENWQE_TYPE_ALTERA_A7] = "GenWQE5-A7",
+};
+
+#define CHIP_NAMES_MAX ARRAY_SIZE(genwqe_types)
+
+static ssize_t show_card_status(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+ const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" };
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%s\n", cs[cd->card_state]);
+ return len;
+}
+
+/**
+ * @brief execute sysfs read entry 'info'
+ *
+ * @param dev
+ * @param attr
+ * @param buf
+ */
+static ssize_t show_card_info(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t len = 0;
+ u16 val16, type, speed;
+ u64 app_id, slu_id, bitstream = -1;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
+ app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
+
+ if (genwqe_is_privileged(cd))
+ bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM);
+
+ val16 = (u16)(slu_id & 0x0fLLU);
+ type = (u16)((slu_id >> 20) & 0xffLLU);
+ speed = (u16)((slu_id >> 28) & 0x0fLLU);
+ if (speed > 2)
+ speed = 3;
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "GenWQE driver version: %s\n"
+ " Device Name/Type: %s %s CardIdx: %d\n"
+ " SLU/APP Config : 0x%016llx/0x%016llx\n"
+ " Build Date/Type : %u/%x/%u %s\n"
+ " Base Clock : %u MHz\n"
+ " Arch/SVN Release: %u/%llx\n"
+ " Bitstream : %llx\n",
+ DRV_VERS_STRING, dev_name(&pci_dev->dev),
+ genwqe_is_privileged(cd) ?
+ "Physical" : "Virtual or no SR-IOV",
+ cd->card_idx, slu_id, app_id,
+ (u16)((slu_id >> 12) & 0x0fLLU), /* month */
+ (u16)((slu_id >> 4) & 0xffLLU), /* day */
+ (u16)((slu_id >> 16) & 0x0fLLU)+2010, /* year */
+ (type >= CHIP_NAMES_MAX) ? "invalid" :
+ genwqe_types[type], genwqe_base_clock_frequency(cd),
+ (u16)((slu_id >> 32) & 0xffLLU), slu_id >> 40,
+ bitstream);
+
+ return len;
+}
+
+/**
+ * @brief execute sysfs read entry 'fault'
+ */
+static ssize_t show_card_curr_fault(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int i;
+ ssize_t len = 0;
+ struct genwqe_reg *regs;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ regs = kzalloc(GENWQE_FFDC_REGS * sizeof(*regs), GFP_ATOMIC);
+ if (regs == NULL)
+ return -ENOMEM;
+
+ genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 1);
+ for (i = 0; i < GENWQE_FFDC_REGS; i++) {
+ if (regs[i].addr == 0xffffffff)
+ break; /* invalid entries */
+
+ if (regs[i].val == 0x0ull)
+ continue; /* do not print 0x0 FIRs */
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ " 0x%08x 0x%016llx\n",
+ regs[i].addr, regs[i].val);
+ }
+
+ kfree(regs);
+ return len;
+}
+
+/**
+ * @brief execute sysfs read entry 'prev_fault'
+ */
+static ssize_t show_card_prev_fault(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ unsigned int i;
+ ssize_t len = 0;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+ struct genwqe_reg *regs = cd->ffdc[GENWQE_DBG_REGS].regs;
+
+ if (regs == NULL)
+ return -EINVAL;
+
+ for (i = 0; i < GENWQE_FFDC_REGS; i++) {
+ if (regs[i].addr == 0xffffffff)
+ break; /* invalid entries */
+
+ if (regs[i].val == 0x0ull)
+ continue; /* do not print 0x0 FIRs */
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ " 0x%08x 0x%016llx\n",
+ regs[i].addr, regs[i].val);
+ }
+ return len;
+}
+
+/**
+ * @brief execute sysfs read entry 'ddcb_info' for card
+ *
+ * @param dev SLU device (genwqex_slu)
+ * @param attr corresponding attribute struct
+ * @param buf target buffer in sysfs (max PAGE_SIZE in length)
+ */
+static ssize_t show_ddcb_info(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int i;
+ struct genwqe_dev *cd;
+ ssize_t len = 0;
+ struct ddcb_queue *queue;
+ struct ddcb *pddcb;
+
+ cd = dev_get_drvdata(dev);
+ queue = &cd->queue;
+ len += scnprintf(&buf[len], PAGE_SIZE - len, /* Software State */
+ "DDCB QUEUE:\n"
+ " ddcb_max: %d\n"
+ " ddcb_daddr: %016llx - %016llx\n"
+ " ddcb_vaddr: %016llx\n"
+ " ddcbs_in_flight: %u\n"
+ " ddcbs_max_in_flight: %u\n"
+ " ddcbs_completed: %u\n"
+ " busy: %u\n"
+ " irqs_processed: %u\n",
+ queue->ddcb_max,
+ (long long)queue->ddcb_daddr,
+ (long long)queue->ddcb_daddr +
+ (queue->ddcb_max * DDCB_LENGTH),
+ (long long)queue->ddcb_vaddr,
+ queue->ddcbs_in_flight,
+ queue->ddcbs_max_in_flight,
+ queue->ddcbs_completed,
+ queue->busy,
+ cd->irqs_processed);
+
+ /* Hardware State */
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ " 0x%08x 0x%016llx IO_QUEUE_CONFIG\n"
+ " 0x%08x 0x%016llx IO_QUEUE_STATUS\n"
+ " 0x%08x 0x%016llx IO_QUEUE_SEGMENT\n"
+ " 0x%08x 0x%016llx IO_QUEUE_INITSQN\n"
+ " 0x%08x 0x%016llx IO_QUEUE_WRAP\n"
+ " 0x%08x 0x%016llx IO_QUEUE_OFFSET\n"
+ " 0x%08x 0x%016llx IO_QUEUE_WTIME\n"
+ " 0x%08x 0x%016llx IO_QUEUE_ERRCNTS\n"
+ " 0x%08x 0x%016llx IO_QUEUE_LRW\n",
+ queue->IO_QUEUE_CONFIG,
+ __genwqe_readq(cd, queue->IO_QUEUE_CONFIG),
+ queue->IO_QUEUE_STATUS,
+ __genwqe_readq(cd, queue->IO_QUEUE_STATUS),
+ queue->IO_QUEUE_SEGMENT,
+ __genwqe_readq(cd, queue->IO_QUEUE_SEGMENT),
+ queue->IO_QUEUE_INITSQN,
+ __genwqe_readq(cd, queue->IO_QUEUE_INITSQN),
+ queue->IO_QUEUE_WRAP,
+ __genwqe_readq(cd, queue->IO_QUEUE_WRAP),
+ queue->IO_QUEUE_OFFSET,
+ __genwqe_readq(cd, queue->IO_QUEUE_OFFSET),
+ queue->IO_QUEUE_WTIME,
+ __genwqe_readq(cd, queue->IO_QUEUE_WTIME),
+ queue->IO_QUEUE_ERRCNTS,
+ __genwqe_readq(cd, queue->IO_QUEUE_ERRCNTS),
+ queue->IO_QUEUE_LRW,
+ __genwqe_readq(cd, queue->IO_QUEUE_LRW));
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "DDCB list (ddcb_act=%d/ddcb_next=%d):\n",
+ queue->ddcb_act, queue->ddcb_next);
+
+ pddcb = queue->ddcb_vaddr;
+ for (i = 0; i < queue->ddcb_max; i++) {
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ " %-3d: RETC=%03x "
+ "SEQ=%04x HSI/SHI=%02x/%02x PRIV=%06llx "
+ "CMD=%02x\n", i,
+ be16_to_cpu(pddcb->retc_16),
+ be16_to_cpu(pddcb->seqnum_16),
+ pddcb->hsi, pddcb->shi,
+ be64_to_cpu(pddcb->priv_64), pddcb->cmd);
+ pddcb++;
+ }
+ return len;
+}
+
+/**
+ * FIXME Generic implementation without the switch would be better.
+ */
+static ssize_t show_card_appid(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ char app_name[5];
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ genwqe_read_app_id(cd, app_name, sizeof(app_name));
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%s\n", app_name);
+ return len;
+}
+
+static ssize_t show_card_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ u64 slu_id, app_id;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
+ app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%016llx.%016llx\n", slu_id, app_id);
+ return len;
+}
+
+/**
+ * FIXME Implement me!
+ */
+static ssize_t show_cpld_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "unknown (FIXME)\n");
+ return len;
+}
+
+static ssize_t show_card_type(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ u8 card_type;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ card_type = genwqe_card_type(cd);
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%s\n", (card_type >= CHIP_NAMES_MAX) ?
+ "invalid" : genwqe_types[card_type]);
+ return len;
+}
+
+static ssize_t show_card_driver(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%s\n", DRV_VERS_STRING);
+ return len;
+}
+
+static ssize_t show_card_tempsens(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ u64 tempsens;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR);
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%016llx\n", tempsens);
+ return len;
+}
+
+/**
+ * FIXME There is a bug in some old versions of the CPLD which selects
+ * the bitstream, which causes the IO_SLU_BITSTREAM register to report
+ * unreliable data in very rare cases. This makes this sysfs
+ * unreliable up to the point were a new CPLD version is being used.
+ *
+ * Unfortunately there is no automatic way yet to query the CPLD
+ * version (See show_cpld_version() ;-)), such that you need to
+ * manually ensure via programming tools that you have a recent
+ * version of the CPLD software.
+ *
+ * The proposed circumvention is to use a special recovery bitstream
+ * on the backup partition (0) to identify problems while loading the
+ * image.
+ */
+static ssize_t show_card_curr_bitstream(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ int curr_bitstream;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1;
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%d\n", curr_bitstream);
+ return len;
+}
+
+static ssize_t show_card_ledcontrol(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ u64 ledcontrol;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ ledcontrol = __genwqe_readq(cd, IO_SLU_LEDCONTROL);
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "0x%016llx\n", ledcontrol);
+ return len;
+}
+
+static ssize_t store_card_ledcontrol(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ u64 ledcontrol;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (kstrtoull(buf, 0, &ledcontrol) < 0)
+ return -EINVAL;
+
+ __genwqe_writeq(cd, IO_SLU_LEDCONTROL, ledcontrol);
+
+ return count;
+}
+
+static ssize_t show_err_inject(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "0x%016llx\n", cd->err_inject);
+ return len;
+}
+
+static ssize_t store_err_inject(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (kstrtoull(buf, 0, &cd->err_inject) < 0)
+ return -EINVAL;
+
+ return count;
+}
+
+/**
+ * IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF.
+ */
+static ssize_t show_card_next_bitstream(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ int next_bitstream;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ switch ((cd->softreset & 0xCull) >> 2) {
+ case 0x2:
+ next_bitstream = 0; break;
+ case 0x3:
+ next_bitstream = 1; break;
+ default:
+ next_bitstream = -1; break; /* error */
+ }
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "%d\n", next_bitstream);
+ return len;
+}
+
+static ssize_t store_card_next_bitstream(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ u64 partition;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (kstrtoull(buf, 0, &partition) < 0)
+ return -EINVAL;
+
+ switch (partition) {
+ case 0x0:
+ cd->softreset = 0x78ull; break;
+ case 0x1:
+ cd->softreset = 0x7Cull; break;
+ default:
+ return -EINVAL;
+ }
+
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset);
+ return count;
+}
+
+static ssize_t show_jtimer(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ int vf_num = 0;
+ u64 jtimer;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (sscanf(attr->attr.name, "vf%d_jobtimer", &vf_num) == 1) {
+ jtimer = genwqe_read_jtimer(cd, vf_num + 1);
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "0x%016llx\n", jtimer);
+ return len;
+ }
+ if (strcmp(attr->attr.name, "pf_jobtimer") == 0) {
+ jtimer = genwqe_read_jtimer(cd, 0);
+ len += scnprintf(&buf[len], PAGE_SIZE - len,
+ "0x%016llx\n", jtimer);
+ return len;
+ }
+ return 0;
+}
+
+static ssize_t store_jtimer(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ u64 jtimer;
+ int vf_num = 0;
+ struct genwqe_dev *cd = dev_get_drvdata(dev);
+
+ if (kstrtoull(buf, 0, &jtimer) < 0)
+ return -EINVAL;
+
+ if (sscanf(attr->attr.name, "vf%d_jobtimer", &vf_num) == 1) {
+ genwqe_write_jtimer(cd, vf_num + 1, jtimer);
+ return count;
+ }
+ if (strcmp(attr->attr.name, "pf_jobtimer") == 0) {
+ genwqe_write_jtimer(cd, 0, jtimer);
+ return count;
+ }
+ return 0;
+}
+
+
+
+
+/* create device_attribute structures / params: name, mode, show, store */
+/* additional flag if valid in VF */
+struct genwqe_dev_attrib {
+ struct device_attribute att; /* sysfs entry attributes */
+ int vf; /* may exist in VF ? */
+};
+
+static struct genwqe_dev_attrib dev_attr_tab[] = {
+ { __ATTR(ledcontrol, (S_IRUGO | S_IWUSR),
+ show_card_ledcontrol, store_card_ledcontrol), 0},
+ {__ATTR(tempsens, S_IRUGO, show_card_tempsens, NULL), 0},
+ {__ATTR(next_bitstream, (S_IRUGO | S_IWUSR),
+ show_card_next_bitstream, store_card_next_bitstream), 0},
+ {__ATTR(err_inject, (S_IRUGO | S_IWUSR),
+ show_err_inject, store_err_inject), 0},
+ {__ATTR(curr_bitstream, S_IRUGO, show_card_curr_bitstream, NULL), 0},
+ {__ATTR(cpld_version, S_IRUGO, show_cpld_version, NULL), 0},
+ {__ATTR(driver, S_IRUGO, show_card_driver, NULL), 1},
+ {__ATTR(type, S_IRUGO, show_card_type, NULL), 1},
+ {__ATTR(version, S_IRUGO, show_card_version, NULL), 1},
+ {__ATTR(appid, S_IRUGO, show_card_appid, NULL), 1},
+ {__ATTR(status, S_IRUGO, show_card_status, NULL), 1},
+ {__ATTR(info, S_IRUGO, show_card_info, NULL), 1},
+ {__ATTR(curr_fault, S_IRUGO, show_card_curr_fault, NULL), 0},
+ {__ATTR(prev_fault, S_IRUGO, show_card_prev_fault, NULL), 0},
+
+ /**
+ * Would be good if we could re-enable the following one for
+ * the VFs, because it allows us to test if we stressed the
+ * queue good enough in our testing, e.g. max_in_flight should
+ * be ddcb_max!
+ */
+ {__ATTR(ddcb_info, S_IRUGO, show_ddcb_info, NULL), 1},
+};
+
+/* job timer setup for the VFs / params: name, mode, show, store */
+static struct device_attribute jtimer_attr_tab[] = {
+ __ATTR(pf_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf0_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf1_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf2_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf3_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf4_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf5_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf6_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf7_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf8_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf9_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf10_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf11_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf12_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf13_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf14_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+ __ATTR(vf15_jobtimer, (S_IRUGO | S_IWUSR), show_jtimer, store_jtimer),
+};
+
+/**
+ * @brief setup sysfs entries of the card device
+ * VF have restricted mmio capabilities, so not all sysfs entries
+ * are allowed in VF
+ *
+ * FIXME Is the error handling properly done?
+ */
+int create_card_sysfs(struct genwqe_dev *cd)
+{
+ int rc, priv;
+ unsigned int i;
+
+ priv = genwqe_is_privileged(cd);
+ for (i = 0; i < ARRAY_SIZE(dev_attr_tab); i++) {
+ struct genwqe_dev_attrib *dev_attr = &dev_attr_tab[i];
+ if (dev_attr->vf || priv) {
+ rc = device_create_file(cd->dev, &dev_attr->att);
+ if (rc != 0)
+ goto err_exit;
+ }
+ }
+ if (!priv)
+ return 0;
+
+ for (i = 0; i < 1 + min_t(int, cd->num_vfs,
+ ARRAY_SIZE(jtimer_attr_tab)); i++) {
+ struct device_attribute *dev_attr = &jtimer_attr_tab[i];
+
+ rc = device_create_file(cd->dev, dev_attr);
+ if (rc != 0)
+ goto err_exit;
+ }
+ return 0;
+
+err_exit:
+ return -ENXIO;
+}
+
+/**
+ * @brief remove sysfs entries of the card device
+ *
+ */
+void remove_card_sysfs(struct genwqe_dev *cd)
+{
+ int priv;
+ unsigned int i;
+
+ priv = genwqe_is_privileged(cd);
+ for (i = 0; i < ARRAY_SIZE(dev_attr_tab); i++) {
+ struct genwqe_dev_attrib *dev_attr = &dev_attr_tab[i];
+ if (dev_attr->vf || priv)
+ device_remove_file(cd->dev, &dev_attr->att);
+ }
+ if (!priv)
+ return;
+
+ for (i = 0; i < 1 + min_t(int, cd->num_vfs,
+ ARRAY_SIZE(jtimer_attr_tab)); i++) {
+ struct device_attribute *dev_attr = &jtimer_attr_tab[i];
+ device_remove_file(cd->dev, dev_attr);
+ }
+}
diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_utils.c
new file mode 100644
index 0000000..f16378d
--- /dev/null
+++ b/drivers/misc/genwqe/card_utils.c
@@ -0,0 +1,1032 @@
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * Miscelanous functionality used in the other GenWQE driver parts.
+ */
+
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <linux/page-flags.h>
+#include <linux/scatterlist.h>
+#include <linux/hugetlb.h>
+#include <linux/iommu.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <asm/pgtable.h>
+
+#include "genwqe_driver.h"
+#include "card_base.h"
+#include "card_ddcb.h"
+
+/**
+ * @brief Write 64-bit register
+ * @param cd genwqe device descriptor
+ * @param byte_offs byte offset within BAR
+ * @param val 64-bit value
+ * @return 0 if success; < 0 if error
+ */
+int __genwqe_writeq(struct genwqe_dev *cd, u64 byte_offs, u64 val)
+{
+ dbg_printk(cd, dbg_card_regs,
+ " genwqe_writeq: reg=%08llx val=%016llx\n",
+ byte_offs, val);
+
+ if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
+ return -EIO;
+
+ if (cd->mmio == NULL)
+ return -EIO;
+
+ __raw_writeq(cpu_to_be64((val)), (cd->mmio + byte_offs));
+ return 0;
+}
+
+/**
+ * @brief Read 64-bit register
+ * @param cd genwqe device descriptor
+ * @param byte_offs offset within BAR
+ * @return value from register
+ */
+u64 __genwqe_readq(struct genwqe_dev *cd, u64 byte_offs)
+{
+ u64 val;
+
+ if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
+ return 0xffffffffffffffffull;
+
+ if ((cd->err_inject & GENWQE_INJECT_GFIR_FATAL) &&
+ (byte_offs == IO_SLC_CFGREG_GFIR))
+ return 0x000000000000ffffull;
+
+ if ((cd->err_inject & GENWQE_INJECT_GFIR_INFO) &&
+ (byte_offs == IO_SLC_CFGREG_GFIR))
+ return 0x00000000ffff0000ull;
+
+ if (cd->mmio == NULL)
+ return 0xffffffffffffffffull;
+
+ val = be64_to_cpu(__raw_readq(cd->mmio + byte_offs));
+
+ dbg_printk(cd, dbg_card_regs,
+ " genwqe_readq: reg=%08llx val=%016llx\n",
+ byte_offs, val);
+
+ return val;
+}
+
+/**
+ * @brief Write 32-bit register
+ * @param cd genwqe device descriptor
+ * @param byte_offs byte offset within BAR
+ * @param val 32-bit value
+ * @return 0 if success; < 0 if error
+ */
+int __genwqe_writel(struct genwqe_dev *cd, uint64_t byte_offs, u32 val)
+{
+ dbg_printk(cd, dbg_card_regs,
+ " genwqe_writel: reg=%08llx val=%08x\n",
+ byte_offs, val);
+
+ if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
+ return -EIO;
+
+ if (cd->mmio == NULL)
+ return -EIO;
+
+ __raw_writel(cpu_to_be32((val)), cd->mmio + byte_offs);
+ return 0;
+}
+
+/**
+ * @brief Read 32-bit register
+ * @param cd genwqe device descriptor
+ * @param byte_offs offset within BAR
+ * @return value from register
+ */
+u32 __genwqe_readl(struct genwqe_dev *cd, uint64_t byte_offs)
+{
+ if (cd->err_inject & GENWQE_INJECT_HARDWARE_FAILURE)
+ return 0xffffffff;
+
+ if (cd->mmio == NULL)
+ return 0xffffffff;
+
+ return be32_to_cpu(__raw_readl(cd->mmio + byte_offs));
+}
+
+/**
+ * @note cd->app_unitcfg need to be filled with valid data first.
+ */
+int genwqe_read_app_id(struct genwqe_dev *cd, char *app_name, int len)
+{
+ int i, j;
+ u32 app_id = (u32)cd->app_unitcfg;
+
+ memset(app_name, 0, len);
+ for (i = 0, j = 0; j < min(len, 4); j++) {
+ char ch = (char)((app_id >> (24 - j*8)) & 0xff);
+ if (ch == ' ')
+ continue;
+ app_name[i++] = isprint(ch) ? ch : 'X';
+ }
+ return i;
+}
+
+/**
+ * @brief Prepare a lookup table for fast crc32 calculations.
+ * Existing kernel functions seem to use a different polynom,
+ * therefore we could not use them here..
+ *
+ * Genwqe's Polynomial = 0x20044009
+ */
+#define CRC32_POLYNOMIAL 0x20044009
+static u32 crc32_tab[256]; /** crc32 lookup table */
+
+void init_crc32(void)
+{
+ int i, j;
+ u32 crc;
+
+ for (i = 0; i < 256; i++) {
+ crc = i << 24;
+ for (j = 0; j < 8; j++) {
+ if (crc & 0x80000000)
+ crc = (crc << 1) ^ CRC32_POLYNOMIAL;
+ else
+ crc = (crc << 1);
+ }
+ crc32_tab[i] = crc;
+ }
+}
+
+/**
+ * @brief Generate 32-bit crc as required for DDCBs
+ * polynomial = x^32 + x^29 + x^18 + x^14 + x^3 + 1 (0x20044009)
+ * - example:
+ * 4 bytes 0x01 0x02 0x03 0x04 with init = 0xffffffff
+ * should result in a crc32 of 0xf33cb7d3
+ *
+ * @param buff pointer to data buffer
+ * @param len length of data for calculation
+ * @param init initial crc (0xffffffff at start)
+ * @return crc32 checksum in little endian format !
+ */
+u32 genwqe_crc32(u8 *buff, size_t len, u32 init)
+{
+ int i;
+ u32 crc;
+
+ crc = init;
+ while (len--) {
+ i = ((crc >> 24) ^ *buff++) & 0xFF;
+ crc = (crc << 8) ^ crc32_tab[i];
+ }
+ return crc;
+}
+
+/**
+ * @brief Enable SR-IOV capability
+ * @param cd genwqe card descriptor
+ */
+int genwqe_enable_sriov(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ cd->num_vfs = pci_sriov_get_totalvfs(pci_dev);
+ return pci_enable_sriov(cd->pci_dev,
+ min_t(int, cd->num_vfs, genwqe_max_num_vfs));
+}
+
+/**
+ * @brief Disable SR-IOV capability
+ * @param cd genwqe card descriptor
+ */
+int genwqe_disable_sriov(struct genwqe_dev *cd)
+{
+ pci_disable_sriov(cd->pci_dev);
+ return 0;
+}
+
+void *__genwqe_alloc_consistent(struct genwqe_dev *cd, size_t size,
+ dma_addr_t *dma_handle)
+{
+ if (get_order(size) > MAX_ORDER)
+ return NULL;
+
+ return pci_alloc_consistent(cd->pci_dev, size, dma_handle);
+}
+
+void __genwqe_free_consistent(struct genwqe_dev *cd, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ if (vaddr == NULL)
+ return;
+ pci_free_consistent(cd->pci_dev, size, vaddr, dma_handle);
+}
+
+static void genwqe_unmap_pages(struct genwqe_dev *cd, dma_addr_t *dma_list,
+ int num_pages)
+{
+ int i;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ for (i = 0; (i < num_pages) && (dma_list[i] != 0x0); i++) {
+ pci_unmap_page(pci_dev, dma_list[i],
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ dma_list[i] = 0x0;
+ }
+}
+
+static int genwqe_map_pages(struct genwqe_dev *cd,
+ struct page **page_list, int num_pages,
+ dma_addr_t *dma_list)
+{
+ int i;
+ dma_addr_t last_daddr = 0;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ /* establish DMA mapping for requested pages */
+ for (i = 0; i < num_pages; i++) {
+ dma_addr_t daddr;
+
+ dma_list[i] = 0x0;
+ daddr = pci_map_page(pci_dev, page_list[i],
+ 0, /* map_offs */
+ PAGE_SIZE,
+ PCI_DMA_BIDIRECTIONAL); /* FIXME rd/rw */
+
+ if (pci_dma_mapping_error(pci_dev, daddr)) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: no dma addr daddr=%016llx!\n",
+ __func__, (long long)daddr);
+ goto err;
+ }
+
+ /**
+ * FIXME It looked like a kernel bug, because
+ * pci_dma_mapping_error() did not return an error in
+ * some cases it should have done it.We used the
+ * following sanity check. After switching to
+ * get_user_pages_fast() this error did not occur
+ * anymore.
+ */
+ if (daddr == last_daddr) {
+ static int count;
+
+ if (count++ < 10)
+ dev_err(&pci_dev->dev,
+ "[%s] already used daddr=%016llx!\n",
+ __func__, daddr);
+ goto err;
+ }
+
+ dma_list[i] = daddr;
+ last_daddr = daddr;
+ }
+ return 0;
+
+ err:
+ genwqe_unmap_pages(cd, dma_list, num_pages);
+ return -EIO;
+}
+
+static int genwqe_sgl_size(int num_pages)
+{
+ int len, num_tlb = num_pages / 7;
+
+ len = sizeof(struct sg_entry) * (num_pages+num_tlb + 1);
+ return roundup(len, PAGE_SIZE);
+}
+
+struct sg_entry *genwqe_alloc_sgl(struct genwqe_dev *cd, int num_pages,
+ dma_addr_t *dma_addr, size_t *sgl_size)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+ struct sg_entry *sgl;
+
+ *sgl_size = genwqe_sgl_size(num_pages);
+ if (get_order(*sgl_size) > MAX_ORDER) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: too much memory requested!\n", __func__);
+ return NULL;
+ }
+
+ sgl = __genwqe_alloc_consistent(cd, *sgl_size, dma_addr);
+ if (sgl == NULL) {
+ dev_err(&pci_dev->dev,
+ "[%s] err: no memory available!\n", __func__);
+ return NULL;
+ }
+
+ return sgl;
+}
+
+void genwqe_dump_sgl(struct genwqe_dev *cd, struct sg_entry *sgl,
+ size_t sgl_size)
+{
+ unsigned int i, j;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ for (j = 0, i = 0; i < sgl_size/sizeof(struct sg_entry); i++, j++) {
+ if (j == 8) {
+ dev_info(&pci_dev->dev, " --\n");
+ j = 0;
+ }
+ dev_info(&pci_dev->dev, " %016llx %08x %08x %s\n",
+ be64_to_cpu(sgl[i].target_addr),
+ be32_to_cpu(sgl[i].len),
+ be32_to_cpu(sgl[i].flags),
+ (be32_to_cpu(sgl[i].len) > PAGE_SIZE) ? "C" : "");
+
+ if (be32_to_cpu(sgl[i].flags) == SG_END_LIST)
+ break;
+ }
+}
+
+int genwqe_setup_sgl(struct genwqe_dev *cd,
+ unsigned long offs,
+ unsigned long size,
+ struct sg_entry *sgl, /* genwqe sgl */
+ dma_addr_t dma_addr, size_t sgl_size,
+ dma_addr_t *dma_list, int page_offs, int num_pages)
+{
+ int i = 0, j = 0, p;
+ unsigned long dma_offs, map_offs;
+ struct pci_dev *pci_dev = cd->pci_dev;
+ dma_addr_t prev_daddr = 0;
+ struct sg_entry *s, *last_s = NULL;
+
+ /* sanity checks */
+ if (offs > PAGE_SIZE) {
+ dev_err(&pci_dev->dev,
+ "[%s] too large start offs %08lx\n", __func__, offs);
+ return -EFAULT;
+ }
+ if (sgl_size < genwqe_sgl_size(num_pages)) {
+ dev_err(&pci_dev->dev,
+ "[%s] sgl_size too small %08lx for %d pages\n",
+ __func__, sgl_size, num_pages);
+ return -EFAULT;
+ }
+
+ dma_offs = 128; /* next block if needed/dma_offset */
+ map_offs = offs; /* offset in first page */
+
+ s = &sgl[0]; /* first set of 8 entries */
+ p = 0; /* page */
+ while (p < num_pages) {
+ dma_addr_t daddr;
+ unsigned int size_to_map;
+
+ /* always write the chaining entry, cleanup is done later */
+ j = 0;
+ s[j].target_addr = cpu_to_be64(dma_addr + dma_offs);
+ s[j].len = cpu_to_be32(128);
+ s[j].flags = cpu_to_be32(SG_CHAINED);
+ j++;
+
+ while (j < 8) {
+ /* DMA mapping for requested page, offs, size */
+ size_to_map = min(size, PAGE_SIZE - map_offs);
+ daddr = dma_list[page_offs + p] + map_offs;
+ size -= size_to_map;
+ map_offs = 0;
+
+ if (prev_daddr == daddr) {
+ u32 prev_len = be32_to_cpu(last_s->len);
+
+ /* pr_info("daddr combining: "
+ "%016llx/%08x -> %016llx\n",
+ prev_daddr, prev_len, daddr); */
+
+ last_s->len = cpu_to_be32(prev_len +
+ size_to_map);
+
+ p++; /* process next page */
+ if (p == num_pages)
+ goto fixup; /* nothing to do */
+
+ prev_daddr = daddr + size_to_map;
+ continue;
+ }
+
+ /* start new entry */
+ s[j].target_addr = cpu_to_be64(daddr);
+ s[j].len = cpu_to_be32(size_to_map);
+ s[j].flags = cpu_to_be32(SG_DATA);
+ prev_daddr = daddr + size_to_map;
+ last_s = &s[j];
+ j++;
+
+ p++; /* process next page */
+ if (p == num_pages)
+ goto fixup; /* nothing to do */
+ }
+ dma_offs += 128;
+ s += 8; /* continue 8 elements further */
+ }
+ fixup:
+ if (j == 1) { /* combining happend on last entry! */
+ s -= 8; /* full shift needed on previous sgl block */
+ j = 7; /* shift all elements */
+ }
+
+ for (i = 0; i < j; i++) /* move elements 1 up */
+ s[i] = s[i + 1];
+
+ s[i].target_addr = cpu_to_be64(0);
+ s[i].len = cpu_to_be32(0);
+ s[i].flags = cpu_to_be32(SG_END_LIST);
+
+ if (genwqe_debug & dbg_card_sglist) {
+ dbg_printk(cd, dbg_card_sglist,
+ " genwqe_sglist %d/sgl poffs=%d %d\n",
+ j, page_offs, num_pages);
+ genwqe_dump_sgl(cd, sgl, sgl_size);
+ }
+ return 0;
+}
+
+void genwqe_free_sgl(struct genwqe_dev *cd, struct sg_entry *sg_list,
+ dma_addr_t dma_addr, size_t size)
+{
+ __genwqe_free_consistent(cd, size, sg_list, dma_addr);
+}
+
+/**
+ * Documentation of get_user_pages is in mm/memory.c:
+ *
+ * If the page is written to, set_page_dirty (or set_page_dirty_lock,
+ * as appropriate) must be called after the page is finished with, and
+ * before put_page is called.
+ */
+static int free_user_pages(struct page **page_list, unsigned int nr_pages,
+ int dirty)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr_pages; i++) {
+ if (page_list[i] != NULL) {
+ if (dirty)
+ set_page_dirty_lock(page_list[i]);
+ put_page(page_list[i]);
+ }
+ }
+ return 0;
+}
+
+/**
+ * @brief Map user-space memory to virtual kernel memory.
+ *
+ * We need to think about how we could speed this up. Of course it is
+ * not a good idea to do this over and over again, like we are
+ * currently doing it. Nevertheless, I am curious where on the path
+ * the performance is spend. Most probably within the memory
+ * allocation functions, but maybe also in the DMA mapping code.
+ *
+ * Restrictions: The maximum size of the possible mapping currently depends
+ * on the amount of memory we can get using kzalloc() for the
+ * page_list and pci_alloc_coherent for the sg_list.
+ * The sg_list is currently itself not scattered, which could
+ * be fixed with some effort. The page_list must be split into
+ * PAGE_SIZE chunks too. All that will make the complicated
+ * code more complicated. If possible, I like to avoid that.
+ *
+ * @param cd pointer to genwqe device
+ * @param m mapping params
+ * @param uaddr user virtual address
+ * @param size size of memory to be mapped
+ * @return 0 if success
+ */
+int user_vmap(struct genwqe_dev *cd, struct dma_mapping *m, void *uaddr,
+ unsigned long size, struct ddcb_requ *req)
+{
+ int rc = -EINVAL;
+ unsigned long data, offs;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if ((uaddr == 0) || (size == 0)) {
+ m->size = 0; /* mark unused and not added */
+ return -EINVAL;
+ }
+ m->u_vaddr = uaddr;
+ m->size = size;
+
+ /* determine space needed for page_list. */
+ data = (unsigned long)uaddr;
+ offs = offset_in_page(data);
+ m->nr_pages = DIV_ROUND_UP(offs + size, PAGE_SIZE);
+
+ m->page_list = kcalloc(m->nr_pages,
+ sizeof(struct page *) + sizeof(dma_addr_t),
+ GFP_KERNEL);
+ if (!m->page_list) {
+ dev_err(&pci_dev->dev, "err: alloc page_list failed\n");
+ m->nr_pages = 0;
+ m->u_vaddr = NULL;
+ m->size = 0; /* mark unused and not added */
+ return -ENOMEM;
+ }
+ m->dma_list = (dma_addr_t *)(m->page_list + m->nr_pages);
+
+ /* pin user pages in memory */
+ rc = get_user_pages_fast(data & PAGE_MASK, /* page aligned addr */
+ m->nr_pages,
+ 1, /* write by caller */
+ m->page_list); /* ptrs to pages */
+
+ /* assumption: get_user_pages can be killed by signals. */
+ if (rc < m->nr_pages) {
+ free_user_pages(m->page_list, rc, 0);
+ rc = -EFAULT;
+ goto fail_get_user_pages;
+ }
+
+ rc = genwqe_map_pages(cd, m->page_list, m->nr_pages, m->dma_list);
+ if (rc != 0)
+ goto fail_free_user_pages;
+
+ return 0;
+
+ fail_free_user_pages:
+ free_user_pages(m->page_list, m->nr_pages, 0);
+
+ fail_get_user_pages:
+ kfree(m->page_list);
+ m->page_list = NULL;
+ m->dma_list = NULL;
+ m->nr_pages = 0;
+ m->u_vaddr = 0;
+ m->size = 0; /* mark unused and not added */
+ return rc;
+}
+
+/**
+ * @brief Undo mapping of user-space memory to virtual
+ * kernel memory.
+ * @param cd pointer to genwqe device
+ * @param m mapping params
+ */
+int user_vunmap(struct genwqe_dev *cd, struct dma_mapping *m,
+ struct ddcb_requ *req)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (!dma_mapping_used(m)) {
+ dev_err(&pci_dev->dev, "[%s] err: mapping %p not used!\n",
+ __func__, m);
+ return -EINVAL;
+ }
+
+ if (m->dma_list)
+ genwqe_unmap_pages(cd, m->dma_list, m->nr_pages);
+
+ if (m->page_list) {
+ free_user_pages(m->page_list, m->nr_pages, 1);
+
+ kfree(m->page_list);
+ m->page_list = NULL;
+ m->dma_list = NULL;
+ m->nr_pages = 0;
+ }
+
+ m->u_vaddr = 0;
+ m->size = 0; /* mark as unused and not added */
+ return 0;
+}
+
+/**
+ * @brief Get chip type from Service Layer Unit Configuration Register
+ * @param cd pointer to the genwqe device descriptor
+ * @return 0 : Altera Stratix-IV 230
+ * 1 : Altera Stratix-IV 530
+ * 2 : Altera Stratix-V A4
+ * 3 : Altera Stratix-V A7
+ */
+u8 genwqe_card_type(struct genwqe_dev *cd)
+{
+ u64 card_type = cd->slu_unitcfg;
+ return (u8)((card_type & SLU_UNITCFG_TYPE_MASK) >> 20);
+}
+
+/**
+ * @brief Card reset.
+ * @param cd pointer to the genwqe device descriptor
+ */
+int genwqe_card_reset(struct genwqe_dev *cd)
+{
+ u64 softrst;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (genwqe_skip_reset || !genwqe_is_privileged(cd))
+ return -ENODEV;
+
+ /* new SL */
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, 0x1ull);
+ msleep(1000);
+ __genwqe_readq(cd, IO_HSU_FIR_CLR);
+ __genwqe_readq(cd, IO_APP_FIR_CLR);
+ __genwqe_readq(cd, IO_SLU_FIR_CLR);
+
+ /* read-modify-write to preserve the stealth bits */
+ /**
+ * FIXME: for SL >= 039, Stealth WE bit allows removing
+ * the read-modify-wrote.
+ * r-m-w may require a mask 0x3C to avoid hitting hard
+ * reset again for error reset (should be 0, chicken).
+ */
+ softrst = __genwqe_readq(cd, IO_SLC_CFGREG_SOFTRESET) & 0x3Cull;
+ __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET,
+ softrst | 0x2ull); /* erst */
+ msleep(50); /* give ERRORRESET some time to finish */
+
+ if (genwqe_need_err_masking(cd)) {
+ dev_info(&pci_dev->dev,
+ "[%s] masking errors for old bitstreams\n", __func__);
+ __genwqe_writeq(cd, IO_SLC_MISC_DEBUG, 0x0aULL);
+ }
+ return 0;
+}
+
+int genwqe_read_softreset(struct genwqe_dev *cd)
+{
+ u64 bitstream;
+
+ if (genwqe_skip_reset || !genwqe_is_privileged(cd))
+ return -ENODEV;
+
+ bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1;
+ cd->softreset = (bitstream == 0) ? 0x8ull : 0xCull;
+ return 0;
+}
+
+/**
+ * @brief Configure device's MSI capability structure
+ * @param cd pointer to the device
+ * @return 0 if no error
+ */
+int genwqe_set_interrupt_capability(struct genwqe_dev *cd, int count)
+{
+ int rc;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ rc = pci_enable_msi_block(pci_dev, count);
+ if (rc == 0)
+ cd->flags |= GENWQE_FLAG_MSI_ENABLED;
+ return rc;
+}
+
+/**
+ * @brief Undo genwqe_set_interrupt_capability()
+ * @param cd pointer to the device
+ */
+void genwqe_reset_interrupt_capability(struct genwqe_dev *cd)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (cd->flags & GENWQE_FLAG_MSI_ENABLED) {
+ pci_disable_msi(pci_dev);
+ cd->flags &= ~GENWQE_FLAG_MSI_ENABLED;
+ }
+}
+
+/**
+ * @cd card device
+ * @r debug register array
+ * @i index to desired entry
+ * @m maximum possible entries
+ * @addr addr which is read
+ * @index index in debug array
+ * @val read value
+ */
+static int set_reg_idx(struct genwqe_dev *cd, struct genwqe_reg *r,
+ unsigned int *i, unsigned int m,
+ u32 addr, u32 idx, u64 val)
+{
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ if (*i >= m) {
+ static int count;
+
+ if (count++ < 10)
+ dev_err(&pci_dev->dev,
+ "err: illegal reg dump index %d/%d!\n", *i, m);
+ return -EFAULT;
+ }
+ r[*i].addr = addr;
+ r[*i].idx = idx;
+ r[*i].val = val;
+ ++*i;
+ return 0;
+}
+
+static int set_reg(struct genwqe_dev *cd, struct genwqe_reg *r,
+ unsigned int *i, unsigned int m, u32 addr, u64 val)
+{
+ return set_reg_idx(cd, r, i, m, addr, 0, val);
+}
+
+int genwqe_read_ffdc_regs(struct genwqe_dev *cd, struct genwqe_reg *regs,
+ unsigned int max_regs, int all)
+{
+ unsigned int i, j, idx = 0;
+ u32 ufir_addr, ufec_addr, sfir_addr, sfec_addr;
+ u64 gfir, sluid, appid, ufir, ufec, sfir, sfec;
+
+ /* Global FIR */
+ gfir = __genwqe_readq(cd, IO_SLC_CFGREG_GFIR);
+ set_reg(cd, regs, &idx, max_regs, IO_SLC_CFGREG_GFIR, gfir);
+
+ /* UnitCfg for SLU */
+ sluid = __genwqe_readq(cd, IO_SLU_UNITCFG); /* 0x00000000 */
+ set_reg(cd, regs, &idx, max_regs, IO_SLU_UNITCFG, sluid);
+
+ /* UnitCfg for APP */
+ appid = __genwqe_readq(cd, IO_APP_UNITCFG); /* 0x02000000 */
+ set_reg(cd, regs, &idx, max_regs, IO_APP_UNITCFG, appid);
+
+ /* Check all chip Units */
+ for (i = 0; i < GENWQE_MAX_UNITS; i++) {
+
+ /* Unit FIR */
+ ufir_addr = (i << 24) | 0x008;
+ ufir = __genwqe_readq(cd, ufir_addr);
+ set_reg(cd, regs, &idx, max_regs, ufir_addr, ufir);
+
+ /* Unit FEC */
+ ufec_addr = (i << 24) | 0x018;
+ ufec = __genwqe_readq(cd, ufec_addr);
+ set_reg(cd, regs, &idx, max_regs, ufec_addr, ufec);
+
+ for (j = 0; j < 64; j++) {
+ /* wherever there is a primary 1, read the 2ndary */
+ if (!all && (!(ufir & (1ull << j))))
+ continue;
+
+ sfir_addr = (i << 24) | (0x100 + 8 * j);
+ sfir = __genwqe_readq(cd, sfir_addr);
+ set_reg(cd, regs, &idx, max_regs, sfir_addr, sfir);
+
+ sfec_addr = (i << 24) | (0x300 + 8 * j);
+ sfec = __genwqe_readq(cd, sfec_addr);
+ set_reg(cd, regs, &idx, max_regs, sfec_addr, sfec);
+ }
+ }
+
+ /* fill with invalid data until end */
+ for (i = idx; i < max_regs; i++) {
+ regs[i].addr = 0xffffffff;
+ regs[i].val = 0xffffffffffffffffull;
+ }
+ return idx;
+}
+
+int genwqe_print_ffdc(struct genwqe_dev *cd)
+{
+ int i;
+ struct genwqe_reg *regs;
+ struct pci_dev *pci_dev = cd->pci_dev;
+
+ dev_err(&pci_dev->dev,
+ "[%s] Genwqe Card%u RegDump\n", __func__, cd->card_idx);
+
+ regs = kzalloc(GENWQE_FFDC_REGS * sizeof(*regs), GFP_ATOMIC);
+ if (regs == NULL)
+ return -ENOMEM;
+
+ genwqe_read_ffdc_regs(cd, regs, GENWQE_FFDC_REGS, 0);
+ for (i = 0; i < GENWQE_FFDC_REGS; i++) {
+ if (regs[i].addr == 0xffffffff)
+ break; /* invalid entries */
+
+ if (regs[i].val == 0x0ull)
+ continue; /* do not print 0x0 FIRs */
+
+ dev_err(&pci_dev->dev,
+ " 0x%08x 0x%016llx\n", regs[i].addr, regs[i].val);
+ }
+
+ kfree(regs);
+ return 0;
+}
+
+/**
+ * @brief This code calculates the number of registers the
+ * LogoutExtendedErrorRegisters procedure requires.
+ */
+int genwqe_ffdc_buff_size(struct genwqe_dev *cd, int uid)
+{
+ int entries = 0, ring, traps, traces, trace_entries;
+ uint32_t eevptr_addr, l_addr, d_len, d_type;
+ uint64_t eevptr, val, addr;
+
+ eevptr_addr = UID_OFFS(uid) | IO_EXTENDED_ERROR_POINTER;
+ eevptr = __genwqe_readq(cd, eevptr_addr);
+
+ if ((eevptr != 0x0) && (eevptr != -1ull)) {
+ l_addr = UID_OFFS(uid) | eevptr;
+
+ while (1) {
+ val = __genwqe_readq(cd, l_addr);
+
+ if ((val == 0x0) || (val == -1ull))
+ break;
+
+ d_len = (val & 0x0000007fff000000) >> 24; /* 38:24 */
+ d_type = (val & 0x0000008000000000) >> 36; /* 39 */
+
+ if (d_type) { /* repeat */
+ entries += d_len;
+ } else { /* size in bytes! */
+ entries += d_len >> 3;
+ }
+
+ l_addr += 8;
+ }
+ }
+
+ for (ring = 0; ring < 8; ring++) {
+ addr = UID_OFFS(uid) | IO_EXTENDED_DIAG_MAP(ring);
+ val = __genwqe_readq(cd, addr);
+
+ if ((val == 0x0ull) || (val == -1ull))
+ continue;
+
+ traps = (val >> 24) & 0xff;
+ traces = (val >> 16) & 0xff;
+ trace_entries = val & 0xffff;
+
+ entries += traps + (traces * trace_entries);
+ }
+ return entries;
+}
+
+/**
+ * @brief This code implements the LogoutExtendedErrorRegisters
+ * procedure.
+ */
+int genwqe_ffdc_buff_read(struct genwqe_dev *cd, int uid,
+ struct genwqe_reg *regs, unsigned int max_regs)
+{
+ int i, traps, traces, trace, trace_entries, trace_entry, ring;
+ unsigned int idx = 0;
+ uint32_t eevptr_addr, l_addr, d_addr, d_len, d_type;
+ uint64_t eevptr, e, val, addr;
+
+ eevptr_addr = UID_OFFS(uid) | IO_EXTENDED_ERROR_POINTER;
+ eevptr = __genwqe_readq(cd, eevptr_addr);
+
+ if ((eevptr != 0x0) && (eevptr != 0xffffffffffffffff)) {
+ l_addr = UID_OFFS(uid) | eevptr;
+ while (1) {
+ e = __genwqe_readq(cd, l_addr);
+ if ((e == 0x0) || (e == 0xffffffffffffffff))
+ break;
+
+ d_addr = (e & 0x0000000000ffffff); /* 23:0 */
+ d_len = (e & 0x0000007fff000000) >> 24; /* 38:24 */
+ d_type = (e & 0x0000008000000000) >> 36; /* 39 */
+ d_addr |= UID_OFFS(uid);
+
+ if (d_type) {
+ for (i = 0; i < (int)d_len; i++) {
+ val = __genwqe_readq(cd, d_addr);
+ set_reg_idx(cd, regs, &idx, max_regs,
+ d_addr, i, val);
+ }
+ } else {
+ d_len >>= 3; /* Size in bytes! */
+ for (i = 0; i < (int)d_len; i++, d_addr += 8) {
+ val = __genwqe_readq(cd, d_addr);
+ set_reg_idx(cd, regs, &idx, max_regs,
+ d_addr, 0, val);
+ }
+ }
+ l_addr += 8;
+ }
+ }
+
+ /**
+ * @note To save time, there are only 6 traces currently
+ * poplulated on Uid=2, Ring=1. each with iters=512.
+ */
+ for (ring = 0; ring < 8; ring++) { /* 0 is fls, 1 is fds,
+ 2...7 are ASI rings */
+ addr = UID_OFFS(uid) | IO_EXTENDED_DIAG_MAP(ring);
+ val = __genwqe_readq(cd, addr);
+
+ if ((val == 0x0ull) || (val == -1ull))
+ continue;
+
+ traps = (val >> 24) & 0xff; /* Number of Traps */
+ traces = (val >> 16) & 0xff; /* Number of Traces */
+ trace_entries = val & 0xffff; /* Entries per trace */
+
+ /* Note: This is a combined loop that dumps both the traps */
+ /* (for the trace == 0 case) as well as the traces 1 to */
+ /* 'traces'. */
+ for (trace = 0; trace <= traces; trace++) {
+ uint32_t diag_sel =
+ EXTENDED_DIAG_SELECTOR(ring, trace);
+
+ addr = UID_OFFS(uid) | IO_EXTENDED_DIAG_SELECTOR;
+ __genwqe_writeq(cd, addr, diag_sel);
+
+ for (trace_entry = 0;
+ trace_entry < (trace ? trace_entries : traps);
+ trace_entry++) {
+ addr = UID_OFFS(uid)|IO_EXTENDED_DIAG_READ_MBX;
+ val = __genwqe_readq(cd, addr);
+ set_reg_idx(cd, regs, &idx, max_regs, addr,
+ (diag_sel<<16) | trace_entry, val);
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * Sets the jobtimeout and heartbeat rate timers for this queue.
+ * Note, this register is accessible only to the PF through the
+ * VF-window. It is not intended for the VF to initialize this.
+ *
+ * It is an error to write to this register while the queue is active,
+ * i.e. when Queue Status(7:6) != 0.
+ */
+int genwqe_write_jtimer(struct genwqe_dev *cd, int func, u64 jtimer)
+{
+ __genwqe_writeq(cd, IO_PF_SLC_VIRTUAL_WINDOW, func & 0xf);
+ __genwqe_writeq(cd, IO_SLC_VF_APPJOB_TIMEOUT, jtimer);
+ return 0;
+}
+
+u64 genwqe_read_jtimer(struct genwqe_dev *cd, int func)
+{
+ u64 jtimer;
+
+ __genwqe_writeq(cd, IO_PF_SLC_VIRTUAL_WINDOW, func & 0xf);
+ jtimer = __genwqe_readq(cd, IO_SLC_VF_APPJOB_TIMEOUT);
+
+ return jtimer;
+}
+
+/**
+ * Note: From a design perspective it turned out to be a bad idea to
+ * use codes here to specifiy the frequency/speed values. An old
+ * driver cannot understand new codes and is therefore always a
+ * problem. Better is to measure out the value or put the
+ * speed/frequency directly into a register which is always a valid
+ * value for old as well as for new software.
+ */
+int genwqe_base_clock_frequency(struct genwqe_dev *cd)
+{
+ u16 speed; /* MHz MHz MHz MHz */
+ static const int speed_grade[] = { 250, 200, 166, 175 };
+
+ speed = (u16)((cd->slu_unitcfg >> 28) & 0x0fLLU);
+ if (speed >= ARRAY_SIZE(speed_grade))
+ return 0; /* illegal value */
+
+ return speed_grade[speed];
+}
+
+void genwqe_stop_traps(struct genwqe_dev *cd)
+{
+ /* Halt the traps while dumping FFDC. */
+ __genwqe_writeq(cd, IO_SLC_MISC_DEBUG_SET, 0xcull);
+}
+
+void genwqe_start_traps(struct genwqe_dev *cd)
+{
+ /* Restart the traps. */
+ __genwqe_writeq(cd, IO_SLC_MISC_DEBUG_CLR, 0xcull);
+
+ if (genwqe_need_err_masking(cd))
+ __genwqe_writeq(cd, IO_SLC_MISC_DEBUG, 0x0aULL);
+}
diff --git a/drivers/misc/genwqe/genwqe_driver.h b/drivers/misc/genwqe/genwqe_driver.h
new file mode 100644
index 0000000..7dc692c
--- /dev/null
+++ b/drivers/misc/genwqe/genwqe_driver.h
@@ -0,0 +1,83 @@
+#ifndef __GENWQE_DRIVER_H__
+#define __GENWQE_DRIVER_H__
+
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+#include <linux/scatterlist.h>
+#include <linux/iommu.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <asm/byteorder.h>
+
+#include <linux/genwqe/genwqe_card.h>
+
+#define DRV_VERS_STRING "1.1.35"
+
+/* Static minor number assignement, until we decide/implement
+ something dynamic. */
+#define GENWQE_MAX_MINOR 128 /**< up to 128 genwqe devices */
+
+enum genwqe_requ_state {
+ GENWQE_REQU_NEW = 0,
+ GENWQE_REQU_ENQUEUED = 1,
+ GENWQE_REQU_TAPPED = 2,
+ GENWQE_REQU_FINISHED = 3,
+ GENWQE_REQU_STATE_MAX,
+};
+
+/**
+ * @brief Allocate a new DDCB execution request. This data structure
+ * contains the user visiable fields of the DDCB to be executed.
+ *
+ * @return ptr to genwqe_ddcb_cmd data structure
+ * to enqueue a ddcb with genwqe_enqueue_ddcb().
+ */
+struct genwqe_ddcb_cmd *ddcb_requ_alloc(void);
+
+/**
+ * @brief Free DDCB execution request.
+ *
+ * @param req [in] ptr to genwqe_ddcb_cmd data structure.
+ */
+void ddcb_requ_free(struct genwqe_ddcb_cmd *req);
+
+/** prototypes from 'card_utils.c' */
+u32 genwqe_crc32(u8 *buff, size_t len, u32 init);
+
+static inline void genwqe_hexdump(struct pci_dev *pci_dev,
+ const void *buff, unsigned int size)
+{
+ char prefix[32];
+
+ scnprintf(prefix, sizeof(prefix), "%s %s: ",
+ GENWQE_DEVNAME, pci_name(pci_dev));
+ print_hex_dump(KERN_INFO, prefix,
+ DUMP_PREFIX_OFFSET, 16, 1, buff, size, true);
+}
+
+#endif /* __GENWQE_DRIVER_H__ */
diff --git a/include/linux/genwqe/genwqe_card.h b/include/linux/genwqe/genwqe_card.h
new file mode 100644
index 0000000..67e89cd
--- /dev/null
+++ b/include/linux/genwqe/genwqe_card.h
@@ -0,0 +1,697 @@
+#ifndef __GENWQE_CARD_H__
+#define __GENWQE_CARD_H__
+
+/**
+ * IBM Accelerator Family 'GenWQE'
+ *
+ * (C) Copyright IBM Corp. 2013
+ *
+ * Author: Frank Haverkamp <haver@...ux.vnet.ibm.com>
+ * Author: Joerg-Stephan Vogt <jsvogt@...ibm.com>
+ * Author: Michael Jung <mijung@...ibm.com>
+ * Author: Michael Ruettger <michael@...ra.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/**
+ * User-space API for the GenWQE card. For debugging and test purposes
+ * the register addresses are included here too.
+ */
+
+#ifdef __KERNEL__
+# include <linux/types.h>
+# include <linux/ioctl.h>
+#else
+# include <stdint.h>
+# include <asm/ioctl.h>
+# include <stddef.h>
+# include <string.h>
+#endif
+
+/*****************************************************************************/
+/* Basename of /sys and /dev interfaces for the GenWQE card */
+/*****************************************************************************/
+
+#if defined(CONFIG_GENWQE_DEVNAME)
+# define GENWQE_DEVNAME CONFIG_GENWQE_DEVNAME
+#else
+# define GENWQE_DEVNAME "genwqe" /**< interface name: sysfs/dev */
+#endif
+
+/*****************************************************************************/
+/* Different supported cards. The 230 and the 530 are not supported anymore */
+/*****************************************************************************/
+
+#define GENWQE_TYPE_ALTERA_230 0x00 /* GenWQE4 Stratix-IV-230 */
+#define GENWQE_TYPE_ALTERA_530 0x01 /* GenWQE4 Stratix-IV-530 */
+#define GENWQE_TYPE_ALTERA_A4 0x02 /* GenWQE5 A4 Stratix-V-A4 */
+#define GENWQE_TYPE_ALTERA_A7 0x03 /* GenWQE5 A7 Stratix-V-A7 */
+
+/*****************************************************************************/
+/* MMIO Unit offsets: Each UnitID occupies a defined address range */
+/*****************************************************************************/
+
+#define UID_OFFS(uid) ((uid) << 24)
+
+#define SLU_OFFS UID_OFFS(0)
+#define HSU_OFFS UID_OFFS(1)
+#define APP_OFFS UID_OFFS(2)
+#define MEMC0_OFFS UID_OFFS(3)
+#define MEMC1_OFFS UID_OFFS(4)
+#define ETH0_OFFS UID_OFFS(5)
+#define ETH1_OFFS UID_OFFS(6)
+
+#define GENWQE_MAX_UNITS 3 /* FIXME: ODT B7363 */
+
+/*****************************************************************************/
+/* Common offsets per UnitID */
+/*****************************************************************************/
+
+#define IO_EXTENDED_ERROR_POINTER 0x00000048
+#define IO_ERROR_INJECT_SELECTOR 0x00000060
+#define IO_EXTENDED_DIAG_SELECTOR 0x00000070
+#define IO_EXTENDED_DIAG_READ_MBX 0x00000078
+#define IO_EXTENDED_DIAG_MAP(ring) (0x00000500 | ((ring) << 3))
+
+#define EXTENDED_DIAG_SELECTOR(ring, trace) (((ring) << 8) | (trace))
+
+/*****************************************************************************/
+/* UnitID 0: Service Layer Unit (SLU) */
+/*****************************************************************************/
+
+/** 10.7.6.1 SLU: Unit Configuration Register */
+#define IO_SLU_UNITCFG 0x00000000
+#define SLU_UNITCFG_TYPE_MASK 0x000000000ff00000 /* 27:20 */
+
+/** 10.2.1.1 SLU: Fault Isolation Register (FIR) (ac_slu_fir) */
+#define IO_SLU_FIR 0x00000008 /* read only, wr direct */
+#define IO_SLU_FIR_CLR 0x00000010 /* read and clear */
+
+/** 10.2.1.2 SLU: First Error Capture Register (FEC/WOF) */
+#define IO_SLU_FEC 0x00000018
+
+#define IO_SLU_ERR_ACT_MASK 0x00000020
+#define IO_SLU_ERR_ATTN_MASK 0x00000028
+#define IO_SLU_FIRX1_ACT_MASK 0x00000030
+#define IO_SLU_FIRX0_ACT_MASK 0x00000038
+#define IO_SLU_SEC_LEM_DEBUG_OVR 0x00000040
+#define IO_SLU_EXTENDED_ERR_PTR 0x00000048
+#define IO_SLU_COMMON_CONFIG 0x00000060
+
+/** 10.6.7.1 SLU: Flash FIR */
+#define IO_SLU_FLASH_FIR 0x00000108
+
+/** 10.5.3.1 SLU: SLC FIR (This section needs to be updated for A5) */
+#define IO_SLU_SLC_FIR 0x00000110
+
+/** 10.2.1.3 SLU: RIU Secondary Trap Register */
+#define IO_SLU_RIU_TRAP 0x00000280
+
+/** 10.6.7.2 SLU: Flash FEC */
+#define IO_SLU_FLASH_FEC 0x00000308
+
+/** 10.5.3.2 SLU: SLC secondary FEC */
+#define IO_SLU_SLC_FEC 0x00000310
+
+#define W1CLR_OFFS 0x00400000
+#define W1SET_OFFS 0x00800000
+
+/* see Genwqe Spec A5_004 Chapt: 10.4.1 */
+/* The Virtual Function's Access is from offset 0x00010000 */
+/* The Physical Function's Access is from offset 0x00050000 */
+/* Single Shared Registers exists only at offset 0x00060000 */
+
+/* From genwqe spec A5_004: 10.4.1.12 SLC: Queue Virtual Window Window
+ * for accessing into a specific VF queue. When accessing the 0x10000
+ * space using the 0x50000 address segment, the value indicated here
+ * is used to specify which VF register is decoded. This register, and
+ * the 0x50000 register space can only be accessed by the PF.
+ * Example, if this register is set to 0x2, then a read from 0x50000
+ * is the same as a read from 0x10000 from VF=2.
+ */
+
+/** 10.5.2.2 SLC: Queue Segment */
+#define IO_SLC_QUEUE_SEGMENT 0x00010000
+#define IO_SLC_VF_QUEUE_SEGMENT 0x00050000
+
+/** 10.4.1.3 SLC: Queue Offset */
+#define IO_SLC_QUEUE_OFFSET 0x00010008
+#define IO_SLC_VF_QUEUE_OFFSET 0x00050008
+
+/** 10.4.1.4 SLC: Queue Configuration */
+#define IO_SLC_QUEUE_CONFIG 0x00010010
+#define IO_SLC_VF_QUEUE_CONFIG 0x00050010
+
+/** 10.4.1.5 SLC: Job Timout/Only accessible for the PF */
+#define IO_SLC_APPJOB_TIMEOUT 0x00010018
+#define IO_SLC_VF_APPJOB_TIMEOUT 0x00050018
+#define TIMEOUT_250MS 0x000FuLL
+#define HEARTBEAT_DISABLE 0xFF00uLL
+
+/** 10.4.1.6 SLC: Queue InitSequence Register */
+#define IO_SLC_QUEUE_INITSQN 0x00010020
+#define IO_SLC_VF_QUEUE_INITSQN 0x00050020
+
+/** 10.4.1.7 SLC: Queue Wrap */
+#define IO_SLC_QUEUE_WRAP 0x00010028
+#define IO_SLC_VF_QUEUE_WRAP 0x00050028
+
+/** 10.4.1.8 SLC: Queue Status */
+#define IO_SLC_QUEUE_STATUS 0x00010100
+#define IO_SLC_VF_QUEUE_STATUS 0x00050100
+
+/** 10.4.1.9 SLC: Queue Working Time */
+#define IO_SLC_QUEUE_WTIME 0x00010030
+#define IO_SLC_VF_QUEUE_WTIME 0x00050030
+
+/** 10.4.1.10 SLC: Queue Error Counts */
+#define IO_SLC_QUEUE_ERRCNTS 0x00010038
+#define IO_SLC_VF_QUEUE_ERRCNTS 0x00050038
+
+/** 10.4.1.11 SLC: Queue Loast Response Word */
+#define IO_SLC_QUEUE_LRW 0x00010040
+#define IO_SLC_VF_QUEUE_LRW 0x00050040
+
+/** 10.4.1.12 SLC: Freerunning Timer */
+#define IO_SLC_FREE_RUNNING_TIMER 0x00010108
+#define IO_SLC_VF_FREE_RUNNING_TIMER 0x00050108
+
+/** 10.4.1.13 SLC: Queue Virtual Access Region */
+#define IO_PF_SLC_VIRTUAL_REGION 0x00050000
+
+/** 10.4.1.14 SLC: Queue Virtual Window */
+#define IO_PF_SLC_VIRTUAL_WINDOW 0x00060000
+
+/** 10.4.1.15 SLC: DDCB Application Job Pending [n] (n=0:63) */
+#define IO_PF_SLC_JOBPEND(n) (0x00061000 + 8*(n))
+#define IO_SLC_JOBPEND(n) IO_PF_SLC_JOBPEND(n)
+
+/** 10.5.3.3 SLC: Parser Trap RAM [n] (n=0:31) */
+#define IO_SLU_SLC_PARSE_TRAP(n) (0x00011000 + 8*(n))
+
+/** 10.5.3.4 SLC: Dispatcher Trap RAM [n] (n=0:31) */
+#define IO_SLU_SLC_DISP_TRAP(n) (0x00011200 + 8*(n))
+
+/** 10.7.6.1 Global Fault Isolation Register (GFIR) */
+#define IO_SLC_CFGREG_GFIR 0x00020000
+#define GFIR_ERR_TRIGGER 0xFFFFull
+
+/** 10.7.6.3 SLU: Soft Reset Register */
+#define IO_SLC_CFGREG_SOFTRESET 0x00020018
+
+/** 10.9.1.7 SLU: Misc Debug Register */
+#define IO_SLC_MISC_DEBUG 0x00020060
+#define IO_SLC_MISC_DEBUG_CLR 0x00020068
+#define IO_SLC_MISC_DEBUG_SET 0x00020070
+
+/** 10.6.4.1 Temperature Sensor Reading */
+#define IO_SLU_TEMPERATURE_SENSOR 0x00030000
+#define IO_SLU_TEMPERATURE_CONFIG 0x00030008
+
+/** 10.9.1.1 Voltage Margining Control */
+#define IO_SLU_VOLTAGE_CONTROL 0x00030080
+#define VOLTAGE_NOMINAL 0x00000000ull
+#define VOLTAGE_DOWN5 0x00000006ull
+#define VOLTAGE_UP5 0x00000007ull
+
+/** 10.7.1.3 Direct LED Control Register */
+#define IO_SLU_LEDCONTROL 0x00030100
+
+/** 10.6.7.4 SLU: Flashbus Direct Access -A5 */
+#define IO_SLU_FLASH_DIRECTACCESS 0x00040010
+
+/** 10.6.7.5 SLU: Flashbus Direct Access2 -A5 */
+#define IO_SLU_FLASH_DIRECTACCESS2 0x00040020
+
+/** 10.6.7.6 SLU: Flashbus Command Interface -A5 */
+#define IO_SLU_FLASH_CMDINTF 0x00040030
+
+/** 10.5.7.7 SLU: BitStream Loaded */
+#define IO_SLU_BITSTREAM 0x00040040
+
+/* This Register hs a switch which will change the CA's to UR */
+#define IO_HSU_ERR_BEHAVIOR 0x01001010
+
+#define IO_SLC2_SQB_TRAP 0x00062000
+#define IO_SLC2_QUEUE_MANAGER_TRAP 0x00062008
+#define IO_SLC2_FLS_MASTER_TRAP 0x00062010
+
+/*****************************************************************************/
+/* UnitId 1: HSU Registers */
+/*****************************************************************************/
+
+#define IO_HSU_UNITCFG 0x01000000
+#define IO_HSU_FIR 0x01000008
+#define IO_HSU_FIR_CLR 0x01000010
+#define IO_HSU_FEC 0x01000018
+#define IO_HSU_ERR_ACT_MASK 0x01000020
+#define IO_HSU_ERR_ATTN_MASK 0x01000028
+#define IO_HSU_FIRX1_ACT_MASK 0x01000030
+#define IO_HSU_FIRX0_ACT_MASK 0x01000038
+#define IO_HSU_SEC_LEM_DEBUG_OVR 0x01000040
+#define IO_HSU_EXTENDED_ERR_PTR 0x01000048
+#define IO_HSU_COMMON_CONFIG 0x01000060
+
+/*****************************************************************************/
+/* UnitID 2: Application Unit (APP) */
+/*****************************************************************************/
+#define IO_APP_UNITCFG 0x02000000
+#define IO_APP_FIR 0x02000008
+#define IO_APP_FIR_CLR 0x02000010
+#define IO_APP_FEC 0x02000018
+#define IO_APP_ERR_ACT_MASK 0x02000020
+#define IO_APP_ERR_ATTN_MASK 0x02000028
+#define IO_APP_FIRX1_ACT_MASK 0x02000030
+#define IO_APP_FIRX0_ACT_MASK 0x02000038
+#define IO_APP_SEC_LEM_DEBUG_OVR 0x02000040
+#define IO_APP_EXTENDED_ERR_PTR 0x02000048
+#define IO_APP_COMMON_CONFIG 0x02000060
+
+#define IO_APP_DEBUG_REG_01 0x02010000
+#define IO_APP_DEBUG_REG_02 0x02010008
+#define IO_APP_DEBUG_REG_03 0x02010010
+#define IO_APP_DEBUG_REG_04 0x02010018
+#define IO_APP_DEBUG_REG_05 0x02010020
+#define IO_APP_DEBUG_REG_06 0x02010028
+#define IO_APP_DEBUG_REG_07 0x02010030
+#define IO_APP_DEBUG_REG_08 0x02010038
+#define IO_APP_DEBUG_REG_09 0x02010040
+#define IO_APP_DEBUG_REG_10 0x02010048
+#define IO_APP_DEBUG_REG_11 0x02010050
+#define IO_APP_DEBUG_REG_12 0x02010058
+#define IO_APP_DEBUG_REG_13 0x02010060
+#define IO_APP_DEBUG_REG_14 0x02010068
+#define IO_APP_DEBUG_REG_15 0x02010070
+#define IO_APP_DEBUG_REG_16 0x02010078
+#define IO_APP_DEBUG_REG_17 0x02010080
+#define IO_APP_DEBUG_REG_18 0x02010088
+
+
+
+/*****************************************************************************/
+/* UnitID 3: MEMC0 */
+/*****************************************************************************/
+
+#define IO_MEMC0_UNITCFG 0x03000000
+#define IO_MEMC0_FIR 0x03000008
+#define IO_MEMC0_FIR_CLR 0x03000010
+#define IO_MEMC0_FEC 0x03000018
+#define IO_MEMC0_ERR_ACT_MASK 0x03000020
+#define IO_MEMC0_ERR_ATTN_MASK 0x03000028
+#define IO_MEMC0_FIRX1_ACT_MASK 0x03000030
+#define IO_MEMC0_FIRX0_ACT_MASK 0x03000038
+#define IO_MEMC0_SEC_LEM_DEBUG_OVR 0x03000040
+#define IO_MEMC0_EXTENDED_ERR_PTR 0x03000048
+#define IO_MEMC0_COMMON_CONFIG 0x03000060
+
+/*****************************************************************************/
+/* UnitID 4: MEMC1 */
+/*****************************************************************************/
+
+#define IO_MEMC1_UNITCFG 0x04000000
+#define IO_MEMC1_FIR 0x04000008
+#define IO_MEMC1_FIR_CLR 0x04000010
+#define IO_MEMC1_FEC 0x04000018
+#define IO_MEMC1_ERR_ACT_MASK 0x04000020
+#define IO_MEMC1_ERR_ATTN_MASK 0x04000028
+#define IO_MEMC1_FIRX1_ACT_MASK 0x04000030
+#define IO_MEMC1_FIRX0_ACT_MASK 0x04000038
+#define IO_MEMC1_SEC_LEM_DEBUG_OVR 0x04000040
+#define IO_MEMC1_EXTENDED_ERR_PTR 0x04000048
+#define IO_MEMC1_COMMON_CONFIG 0x04000060
+
+/*****************************************************************************/
+/* UnitID 5: ETH0 */
+/*****************************************************************************/
+
+#define IO_ETH0_UNITCFG 0x05000000
+#define IO_ETH0_FIR 0x05000008
+#define IO_ETH0_FIR_CLR 0x05000010
+#define IO_ETH0_FEC 0x05000018
+#define IO_ETH0_ERR_ACT_MASK 0x05000020
+#define IO_ETH0_ERR_ATTN_MASK 0x05000028
+#define IO_ETH0_FIRX1_ACT_MASK 0x05000030
+#define IO_ETH0_FIRX0_ACT_MASK 0x05000038
+#define IO_ETH0_SEC_LEM_DEBUG_OVR 0x05000040
+#define IO_ETH0_EXTENDED_ERR_PTR 0x05000048
+#define IO_ETH0_COMMON_CONFIG 0x05000060
+
+/*****************************************************************************/
+/* UnitID 6: ETH1 */
+/*****************************************************************************/
+
+#define IO_ETH1_UNITCFG 0x06000000
+#define IO_ETH1_FIR 0x06000008
+#define IO_ETH1_FIR_CLR 0x06000010
+#define IO_ETH1_FEC 0x06000018
+#define IO_ETH1_ERR_ACT_MASK 0x06000020
+#define IO_ETH1_ERR_ATTN_MASK 0x06000028
+#define IO_ETH1_FIRX1_ACT_MASK 0x06000030
+#define IO_ETH1_FIRX0_ACT_MASK 0x06000038
+#define IO_ETH1_SEC_LEM_DEBUG_OVR 0x06000040
+#define IO_ETH1_EXTENDED_ERR_PTR 0x06000048
+#define IO_ETH1_COMMON_CONFIG 0x06000060
+
+/*****************************************************************************/
+/* Register Access Functions */
+/*****************************************************************************/
+
+/** port io struct. Used to read / write from / to registers */
+struct regs_io {
+ uint32_t num; /**< register offset/address */
+ union {
+ uint64_t val64;
+ uint32_t val32;
+ uint16_t define;
+ };
+};
+
+/**
+ * All registers of our card will return values not equal this values.
+ * If we see IO_ILLEGAL_VALUE on any of our MMIO register reads, the
+ * card can be considered as unusable. It will need recovery.
+ */
+#define IO_ILLEGAL_VALUE 0xffffffffffffffff
+
+/*****************************************************************************
+ *
+ * Generic DDCB execution interface.
+ *
+ * This interface is a first prototype resulting from discussions we
+ * had with other teams which wanted to use the Genwqe card. It allows
+ * to issue a DDCB request in a generic way. The request will block
+ * until it finishes or time out with error.
+ *
+ * Some DDCBs require DMA addresses to be specified in the ASIV
+ * block. The interface provies the capability to let the kernel
+ * driver know where those addresses are by specifying the ATS field,
+ * such that it can replace the user-space addresses with appropriate
+ * DMA addresses or DMA addresses of a scatter gather list which is
+ * dynamically created.
+ *
+ * Our hardware will refuse DDCB execution if the ATS field is not as
+ * expected. That means the DDCB execution engine in the chip knows
+ * where it expects DMA addresses within the ASIV part of the DDCB and
+ * will check that against the ATS field definition. Any invalid or
+ * unknown ATS content will lead to DDCB refusal.
+ *
+ ****************************************************************************/
+
+/**< Genwqe chip Units */
+#define DDCB_ACFUNC_SLU 0x00 /**< chip service layer unit */
+#define DDCB_ACFUNC_APP 0x01 /**< chip application */
+
+/**< DDCB return codes (RETC) */
+#define DDCB_RETC_IDLE 0x0000 /**< Unexecuted/DDCB created */
+#define DDCB_RETC_PENDING 0x0101 /**< Pending Execution */
+#define DDCB_RETC_COMPLETE 0x0102 /**< Cmd complete. No error */
+#define DDCB_RETC_FAULT 0x0104 /**< App Err, recoverable */
+#define DDCB_RETC_ERROR 0x0108 /**< App Err, non-recoverable */
+#define DDCB_RETC_FORCED_ERROR 0x01ff /**< overwritten by driver */
+
+#define DDCB_RETC_UNEXEC 0x0110 /**< Unexe/Removed from queue */
+#define DDCB_RETC_TERM 0x0120 /**< Terminated */
+#define DDCB_RETC_RES0 0x0140 /**< Reserved */
+#define DDCB_RETC_RES1 0x0180 /**< Reserved */
+
+/**< DDCB Command Options (CMDOPT) */
+#define DDCB_OPT_ECHO_FORCE_NO 0x0000 /**< ECHO DDCB */
+#define DDCB_OPT_ECHO_FORCE_102 0x0001 /**< force return code */
+#define DDCB_OPT_ECHO_FORCE_104 0x0002
+#define DDCB_OPT_ECHO_FORCE_108 0x0003
+
+#define DDCB_OPT_ECHO_FORCE_110 0x0004 /**< only on PF ! */
+#define DDCB_OPT_ECHO_FORCE_120 0x0005
+#define DDCB_OPT_ECHO_FORCE_140 0x0006
+#define DDCB_OPT_ECHO_FORCE_180 0x0007
+
+#define DDCB_OPT_ECHO_COPY_NONE (0 << 5)
+#define DDCB_OPT_ECHO_COPY_ALL (1 << 5)
+
+/* Definitions of Service Layer Commands */
+#define SLCMD_ECHO_SYNC 0x00 /* PF/VF */
+#define SLCMD_MOVE_FLASH 0x06 /* PF only */
+
+#define FLASH_FLAGS_MODE 0x03 /* bit 0 and 1 used for mode */
+#define FLASH_FLAGS_DLOAD 0 /* mode: download */
+#define FLASH_FLAGS_EMUL 1 /* mode: emulation */
+#define FLASH_FLAGS_UPLOAD 2 /* mode: upload */
+#define FLASH_FLAGS_VERIFY 3 /* mode: verify */
+#define FLASH_FLAG_NOTAP (1 << 2)/* just dump DDCB and exit */
+#define FLASH_FLAG_POLL (1 << 3)/* wait for RETC >= 0102 */
+#define FLASH_FLAG_PARTITION (1 << 4)
+#define FLASH_FLAG_ERASE (1 << 5)
+
+enum genwqe_card_state {
+ GENWQE_CARD_UNUSED = 0,
+ GENWQE_CARD_USED = 1,
+ GENWQE_CARD_FATAL_ERROR = 2,
+ GENWQE_CARD_STATE_MAX,
+};
+
+/** common struct for chip image exchange */
+struct chip_bitstream {
+ uint8_t *pdata; /* pointer to image data */
+ int size; /* size of image file */
+ uint32_t crc; /* crc of this image */
+ uint8_t partition; /* '0', '1', or 'v' */
+ uint64_t targetaddr; /* starting address in Flash */
+ uint8_t uid; /* 1=host / x=dram */
+
+ uint64_t slu_id; /**< informational/sim: SluID */
+ uint64_t app_id; /**< informational/sim: AppID */
+
+ uint16_t retc; /**< returned from processing */
+ uint16_t attn; /**< attention code from processing */
+ uint32_t progress; /**< progress code from processing */
+};
+
+/**< issuing a specific DDCB command */
+#define DDCB_LENGTH 256 /**< for debug data */
+#define DDCB_ASIV_LENGTH 104 /**< len of the DDCB ASIV array */
+#define DDCB_ASIV_LENGTH_ATS 96 /**< ASIV in ATS architecture */
+#define DDCB_ASV_LENGTH 64 /**< len of the DDCB ASV array */
+#define DDCB_FIXUPS 12 /**< maximum number of fixups */
+
+/**
+ * We might have addresses within the ASIV data. Those need to be
+ * replaced by valid DMA addresses to the buffer, sg-list or
+ * child-block in the kernel driver handling the request.
+ */
+#define GENWQE_DMA_TYPE_MASK 0x18 /**< mask off type */
+#define GENWQE_DMA_TYPE_RAW 0x00 /**< no DMA addr */
+#define GENWQE_DMA_TYPE_FLAT 0x08 /**< contignous DMA block */
+#define GENWQE_DMA_TYPE_SGLIST 0x10 /**< DMA sg-list */
+#define GENWQE_DMA_TYPE_CHILD 0x18 /**< DMA child-block */
+#define GENWQE_DMA_WRITEABLE 0x04 /**< memory writeable? */
+
+/**
+ * Genwqe FFDC Register dump functionality uses an array of struct
+ * genwqe_reg to exchange the data between driver and application.
+ */
+struct genwqe_reg {
+ uint32_t addr;
+ uint32_t idx;
+ uint64_t val;
+};
+
+/**
+ * Use this to find out how many debug entries the driver gathered
+ * when it started up. User must allocate struct genwqe_reg arrays of
+ * appropriate size when calling the kernel to retrieve the data.
+ */
+enum genwqe_dbg_type {
+ GENWQE_DBG_UNIT0 = 0, /**< captured before prev errs cleared */
+ GENWQE_DBG_UNIT1 = 1,
+ GENWQE_DBG_UNIT2 = 2,
+ GENWQE_DBG_UNIT3 = 3,
+ GENWQE_DBG_UNIT4 = 4,
+ GENWQE_DBG_UNIT5 = 5,
+ GENWQE_DBG_UNIT6 = 6,
+ GENWQE_DBG_UNIT7 = 7,
+ GENWQE_DBG_REGS = 8,
+ GENWQE_DBG_DMA = 9,
+ GENWQE_DBG_UNITS = 10, /**< max number of possible debug units */
+};
+
+struct genwqe_dbg_data { /**< data gathering interface */
+ enum genwqe_dbg_type type; /**< debug type to retrieved */
+ unsigned int entries; /**< required debug entries */
+ struct genwqe_reg regs[0]; /**< provide enough space here */
+};
+
+#define GENWQE_DBG_DATA_SIZE(entries) \
+ (sizeof(struct genwqe_dbg_data) + \
+ (entries) * sizeof(struct genwqe_reg))
+
+struct genwqe_debug_data {
+ char driver_version[64];
+ uint64_t slu_unitcfg;
+ uint64_t app_unitcfg;
+
+ uint8_t ddcb_before[DDCB_LENGTH];
+ uint8_t ddcb_prev[DDCB_LENGTH];
+ uint8_t ddcb_finished[DDCB_LENGTH];
+};
+
+/**
+ * Address Translation Specification (ATS) definitions
+ *
+ * Each 4 bit within the ATS 64-bit word specify the required address
+ * translation at the defined offset.
+ *
+ * 63 LSB
+ * 6666.5555.5555.5544.4444.4443.3333.3333 ... 11
+ * 3210.9876.5432.1098.7654.3210.9876.5432 ... 1098.7654.3210
+ *
+ * offset: 0x00 0x08 0x10 0x18 0x20 0x28 0x30 0x38 ... 0x68 0x70 0x78
+ * res res res res ASIV ...
+ * The first 4 entries in the ATS word are reserved. The following nibbles
+ * each describe at an 8 byte offset the format of the required data.
+ */
+#define ATS_TYPE_DATA 0x0ULL /**< data */
+#define ATS_TYPE_FLAT_RD 0x4ULL /**< flat buffer read only */
+#define ATS_TYPE_FLAT_RDWR 0x5ULL /**< flat buffer read/write */
+#define ATS_TYPE_SGL_RD 0x6ULL /**< sgl read only */
+#define ATS_TYPE_SGL_RDWR 0x7ULL /**< sgl read/write */
+
+#define ATS_SET_FLAGS(_struct, _field, _flags) \
+ (((_flags) & 0xf) << (44 - (4 * (offsetof(_struct, _field) / 8))))
+
+#define ATS_GET_FLAGS(_ats, _byte_offs) \
+ (((_ats) >> (44 - (4 * ((_byte_offs) / 8)))) & 0xf)
+
+/**
+ * User parameter for generic DDCB commands. On the way into the
+ * kernel the driver will read the whole data structure. On the way
+ * out the driver will not copy the ASIV data back to userland.
+ */
+struct genwqe_ddcb_cmd {
+ /* ------ START of data copied to/from driver ---------------------- */
+ struct genwqe_ddcb_cmd *next; /**< chaining genwqe_ddcb_cmd */
+
+ /* XDIR might be needed one day to allow to ignore errors. But
+ that is an interface change and should be treated with some
+ caution. */
+ uint8_t acfunc; /**< accelerators functional unit */
+ uint8_t cmd; /**< command to execute */
+ uint16_t cmdopts; /**< command options */
+
+ uint8_t asiv_length; /**< used parameter length */
+ uint8_t asv_length; /**< length of valid return values */
+
+ uint16_t retc; /**< return code from processing */
+ uint16_t attn; /**< attention code from processing */
+ uint32_t progress; /**< progress code from processing */
+
+ uint16_t vcrc; /**< variant crc16 */
+ uint64_t deque_ts; /**< dequeue time stamp */
+ uint64_t cmplt_ts; /**< completion time stamp */
+ uint64_t disp_ts; /**< SW processing start */
+
+ /* move to end and avoid copy-back */
+ struct genwqe_debug_data *debug_data; /**< collect debug data */
+
+ /**< command specific values */
+ uint8_t asv[DDCB_ASV_LENGTH];
+
+ /* ------ END of data copied from driver --------------------------- */
+ union {
+ struct {
+ uint64_t ats;
+ uint8_t asiv[DDCB_ASIV_LENGTH_ATS];
+ };
+ /**< used for flash update to keep it backward compatible */
+ uint8_t __asiv[DDCB_ASIV_LENGTH];
+ };
+ /* ------ END of data copied to driver ----------------------------- */
+};
+
+static inline void genwqe_ddcb_cmd_init(struct genwqe_ddcb_cmd *cmd)
+{
+ uint64_t tstamp;
+
+ tstamp = cmd->disp_ts;
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->disp_ts = tstamp;
+}
+
+/*****************************************************************************
+ * ioctls for the genwqe card
+ *****************************************************************************/
+
+#define GENWQE_IOC_CODE 0xa5
+
+/**< Access functions */
+#define GENWQE_READ_REG64 _IOR(GENWQE_IOC_CODE, 30, struct regs_io *)
+#define GENWQE_WRITE_REG64 _IOW(GENWQE_IOC_CODE, 31, struct regs_io *)
+#define GENWQE_READ_REG32 _IOR(GENWQE_IOC_CODE, 32, struct regs_io *)
+#define GENWQE_WRITE_REG32 _IOW(GENWQE_IOC_CODE, 33, struct regs_io *)
+#define GENWQE_READ_REG16 _IOR(GENWQE_IOC_CODE, 34, struct regs_io *)
+#define GENWQE_WRITE_REG16 _IOW(GENWQE_IOC_CODE, 35, struct regs_io *)
+
+#define GENWQE_GET_CARD_STATE _IOR(GENWQE_IOC_CODE, 36, \
+ enum genwqe_card_state *)
+
+/**
+ * Avoid pinning and unpinning of memory pages dynamically. Instead
+ * the idea is to pin the whole buffer space required for DDCB
+ * opertionas in advance. The driver will reuse this pinning and the
+ * memory associated with it to setup the sglists for the DDCB
+ * requests without the need to allocate and free memory or map and
+ * unmap to get the DMA addresses.
+ *
+ * The inverse operation needs to be called after the pinning is not
+ * needed anymore. The pinnings else the pinnings will get removed
+ * after the device is closed. Note that pinnings will required
+ * memory.
+ */
+struct genwqe_mem {
+ unsigned long addr; /* virtual user space address */
+ unsigned long size; /* size of the area pin/dma-map/unmap */
+ int direction; /* 0: read/1: read and write */
+};
+
+#define GENWQE_PIN_MEM _IOWR(GENWQE_IOC_CODE, 40, struct genwqe_mem *)
+#define GENWQE_UNPIN_MEM _IOWR(GENWQE_IOC_CODE, 41, struct genwqe_mem *)
+
+/**
+ * @brief Generic synchronous DDCB execution interface.
+ * Synchronously execute a DDCB.
+ *
+ * @param [in] fd open file descriptor to the genwqe_card device.
+ * @param [inout] cmd DDCB execution request
+ * @return 0 on success or negative error code.
+ * -EINVAL: Invalid parameters (ASIV_LEN, ASV_LEN, illegal fixups
+ * no mappings found/could not create mappings.
+ * -EFAULT: illegal addresses in fixups.
+ * purging failed.
+ * -EBADMSG: enqueing failed, retc != DDCB_RETC_COMPLETE.
+ */
+#define GENWQE_EXECUTE_DDCB \
+ _IOWR(GENWQE_IOC_CODE, 50, struct genwqe_ddcb_cmd *)
+#define GENWQE_EXECUTE_RAW_DDCB \
+ _IOWR(GENWQE_IOC_CODE, 51, struct genwqe_ddcb_cmd *)
+
+/**< Debug data retrieval */
+#define GENWQE_GET_DBG_DATA_SIZE \
+ _IOR(GENWQE_IOC_CODE, 62, struct genwqe_dbg_data *)
+#define GENWQE_GET_DBG_PREV_DATA \
+ _IOR(GENWQE_IOC_CODE, 63, struct genwqe_dbg_data *)
+#define GENWQE_GET_DBG_CURR_DATA \
+ _IOR(GENWQE_IOC_CODE, 64, struct genwqe_dbg_data *)
+
+/**< Service Layer functions (PF only) */
+#define GENWQE_SLU_UPDATE _IOWR(GENWQE_IOC_CODE, 80, struct chip_bistream *)
+#define GENWQE_SLU_READ _IOWR(GENWQE_IOC_CODE, 81, struct chip_bistream *)
+
+#endif /* __GENWQE_CARD_H__ */
--
1.7.1
--
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