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Message-ID: <20190319215401.6562-6-sonal.santan@xilinx.com>
Date: Tue, 19 Mar 2019 14:54:00 -0700
From: <sonal.santan@...inx.com>
To: <dri-devel@...ts.freedesktop.org>
CC: <linux-kernel@...r.kernel.org>, <gregkh@...uxfoundation.org>,
<airlied@...hat.com>, <cyrilc@...inx.com>, <michals@...inx.com>,
<lizhih@...inx.com>, <hyunk@...inx.com>,
Sonal Santan <sonal.santan@...inx.com>
Subject: [RFC PATCH Xilinx Alveo 5/6] Add management driver
From: Sonal Santan <sonal.santan@...inx.com>
Signed-off-by: Sonal Santan <sonal.santan@...inx.com>
---
drivers/gpu/drm/xocl/mgmtpf/mgmt-core.c | 960 +++++++++++++++++++++++
drivers/gpu/drm/xocl/mgmtpf/mgmt-core.h | 147 ++++
drivers/gpu/drm/xocl/mgmtpf/mgmt-cw.c | 30 +
drivers/gpu/drm/xocl/mgmtpf/mgmt-ioctl.c | 148 ++++
drivers/gpu/drm/xocl/mgmtpf/mgmt-reg.h | 244 ++++++
drivers/gpu/drm/xocl/mgmtpf/mgmt-sysfs.c | 318 ++++++++
drivers/gpu/drm/xocl/mgmtpf/mgmt-utils.c | 399 ++++++++++
7 files changed, 2246 insertions(+)
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-core.c
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-core.h
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-cw.c
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-ioctl.c
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-reg.h
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-sysfs.c
create mode 100644 drivers/gpu/drm/xocl/mgmtpf/mgmt-utils.c
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.c b/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.c
new file mode 100644
index 000000000000..2eb0267fc2b2
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.c
@@ -0,0 +1,960 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Simple Driver for Management PF
+ *
+ * Copyright (C) 2017 Xilinx, Inc.
+ *
+ * Code borrowed from Xilinx SDAccel XDMA driver
+ *
+ * Author(s):
+ * Sonal Santan <sonal.santan@...inx.com>
+ */
+#include "mgmt-core.h"
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/version.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/crc32c.h>
+#include "../xocl_drv.h"
+#include "../version.h"
+
+//#define USE_FEATURE_ROM
+
+static const struct pci_device_id pci_ids[] = XOCL_MGMT_PCI_IDS;
+
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+int health_interval = 5;
+module_param(health_interval, int, (S_IRUGO|S_IWUSR));
+MODULE_PARM_DESC(health_interval,
+ "Interval (in sec) after which the health thread is run. (1 = Minimum, 5 = default)");
+
+int health_check = 1;
+module_param(health_check, int, (S_IRUGO|S_IWUSR));
+MODULE_PARM_DESC(health_check,
+ "Enable health thread that checks the status of AXI Firewall and SYSMON. (0 = disable, 1 = enable)");
+
+int minimum_initialization;
+module_param(minimum_initialization, int, (S_IRUGO|S_IWUSR));
+MODULE_PARM_DESC(minimum_initialization,
+ "Enable minimum_initialization to force driver to load without vailid firmware or DSA. Thus xbsak flash is able to upgrade firmware. (0 = normal initialization, 1 = minimum initialization)");
+
+#define LOW_TEMP 0
+#define HI_TEMP 85000
+#define LOW_MILLVOLT 500
+#define HI_MILLVOLT 2500
+
+
+static dev_t xclmgmt_devnode;
+struct class *xrt_class;
+
+/*
+ * Called when the device goes from unused to used.
+ */
+static int char_open(struct inode *inode, struct file *file)
+{
+ struct xclmgmt_dev *lro;
+
+ /* pointer to containing data structure of the character device inode */
+ lro = xocl_drvinst_open(inode->i_cdev);
+ if (!lro)
+ return -ENXIO;
+
+ /* create a reference to our char device in the opened file */
+ file->private_data = lro;
+ BUG_ON(!lro);
+
+ mgmt_info(lro, "opened file %p by pid: %d\n",
+ file, pid_nr(task_tgid(current)));
+
+ return 0;
+}
+
+/*
+ * Called when the device goes from used to unused.
+ */
+static int char_close(struct inode *inode, struct file *file)
+{
+ struct xclmgmt_dev *lro;
+
+ lro = (struct xclmgmt_dev *)file->private_data;
+ BUG_ON(!lro);
+
+ mgmt_info(lro, "Closing file %p by pid: %d\n",
+ file, pid_nr(task_tgid(current)));
+
+ xocl_drvinst_close(lro);
+
+ return 0;
+}
+
+/*
+ * Unmap the BAR regions that had been mapped earlier using map_bars()
+ */
+static void unmap_bars(struct xclmgmt_dev *lro)
+{
+ if (lro->core.bar_addr) {
+ /* unmap BAR */
+ pci_iounmap(lro->core.pdev, lro->core.bar_addr);
+ /* mark as unmapped */
+ lro->core.bar_addr = NULL;
+ }
+ if (lro->core.intr_bar_addr) {
+ /* unmap BAR */
+ pci_iounmap(lro->core.pdev, lro->core.intr_bar_addr);
+ /* mark as unmapped */
+ lro->core.intr_bar_addr = NULL;
+ }
+}
+
+static int identify_bar(struct xocl_dev_core *core, int bar)
+{
+ void *__iomem bar_addr;
+ resource_size_t bar_len;
+
+ bar_len = pci_resource_len(core->pdev, bar);
+ bar_addr = pci_iomap(core->pdev, bar, bar_len);
+ if (!bar_addr) {
+ xocl_err(&core->pdev->dev, "Could not map BAR #%d",
+ core->bar_idx);
+ return -EIO;
+ }
+
+ /*
+ * did not find a better way to identify BARS. Currently,
+ * we have DSAs which rely VBNV name to differenciate them.
+ * And reading VBNV name needs to bring up Feature ROM.
+ * So we are not able to specify BARs in devices.h
+ */
+ if (bar_len < 1024 * 1024 && bar > 0) {
+ core->intr_bar_idx = bar;
+ core->intr_bar_addr = bar_addr;
+ core->intr_bar_size = bar_len;
+ } else if (bar_len < 256 * 1024 * 1024) {
+ core->bar_idx = bar;
+ core->bar_size = bar_len;
+ core->bar_addr = bar_addr;
+ }
+
+ return 0;
+}
+
+/* map_bars() -- map device regions into kernel virtual address space
+ *
+ * Map the device memory regions into kernel virtual address space after
+ * verifying their sizes respect the minimum sizes needed, given by the
+ * bar_map_sizes[] array.
+ */
+static int map_bars(struct xclmgmt_dev *lro)
+{
+ struct pci_dev *pdev = lro->core.pdev;
+ resource_size_t bar_len;
+ int i, ret = 0;
+
+ for (i = PCI_STD_RESOURCES; i <= PCI_STD_RESOURCE_END; i++) {
+ bar_len = pci_resource_len(pdev, i);
+ if (bar_len > 0) {
+ ret = identify_bar(&lro->core, i);
+ if (ret)
+ goto failed;
+ }
+ }
+
+ /* succesfully mapped all required BAR regions */
+ return 0;
+
+failed:
+ unmap_bars(lro);
+ return ret;
+}
+
+void get_pcie_link_info(struct xclmgmt_dev *lro,
+ unsigned short *link_width, unsigned short *link_speed, bool is_cap)
+{
+ u16 stat;
+ long result;
+ int pos = is_cap ? PCI_EXP_LNKCAP : PCI_EXP_LNKSTA;
+
+ result = pcie_capability_read_word(lro->core.pdev, pos, &stat);
+ if (result) {
+ *link_width = *link_speed = 0;
+ mgmt_err(lro, "Read pcie capability failed");
+ return;
+ }
+ *link_width = (stat & PCI_EXP_LNKSTA_NLW) >> PCI_EXP_LNKSTA_NLW_SHIFT;
+ *link_speed = stat & PCI_EXP_LNKSTA_CLS;
+}
+
+void device_info(struct xclmgmt_dev *lro, struct xclmgmt_ioc_info *obj)
+{
+ u32 val, major, minor, patch;
+ struct FeatureRomHeader rom;
+
+ memset(obj, 0, sizeof(struct xclmgmt_ioc_info));
+ if (sscanf(XRT_DRIVER_VERSION, "%d.%d.%d", &major, &minor, &patch) != 3)
+ return;
+
+ obj->vendor = lro->core.pdev->vendor;
+ obj->device = lro->core.pdev->device;
+ obj->subsystem_vendor = lro->core.pdev->subsystem_vendor;
+ obj->subsystem_device = lro->core.pdev->subsystem_device;
+ obj->driver_version = XOCL_DRV_VER_NUM(major, minor, patch);
+ obj->pci_slot = PCI_SLOT(lro->core.pdev->devfn);
+
+ val = MGMT_READ_REG32(lro, GENERAL_STATUS_BASE);
+ mgmt_info(lro, "MIG Calibration: %d\n", val);
+
+ obj->mig_calibration[0] = (val & BIT(0)) ? true : false;
+ obj->mig_calibration[1] = obj->mig_calibration[0];
+ obj->mig_calibration[2] = obj->mig_calibration[0];
+ obj->mig_calibration[3] = obj->mig_calibration[0];
+
+ /*
+ * Get feature rom info
+ */
+ obj->ddr_channel_num = xocl_get_ddr_channel_count(lro);
+ obj->ddr_channel_size = xocl_get_ddr_channel_size(lro);
+ obj->time_stamp = xocl_get_timestamp(lro);
+ obj->isXPR = XOCL_DSA_XPR_ON(lro);
+ xocl_get_raw_header(lro, &rom);
+ memcpy(obj->vbnv, rom.VBNVName, 64);
+ memcpy(obj->fpga, rom.FPGAPartName, 64);
+
+ /* Get sysmon info */
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_TEMP, &val);
+ obj->onchip_temp = val / 1000;
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_INT, &val);
+ obj->vcc_int = val;
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_AUX, &val);
+ obj->vcc_aux = val;
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_BRAM, &val);
+ obj->vcc_bram = val;
+
+ fill_frequency_info(lro, obj);
+ get_pcie_link_info(lro, &obj->pcie_link_width, &obj->pcie_link_speed,
+ false);
+}
+
+/*
+ * Maps the PCIe BAR into user space for memory-like access using mmap().
+ * Callable even when lro->ready == false.
+ */
+static int bridge_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int rc;
+ struct xclmgmt_dev *lro;
+ unsigned long off;
+ unsigned long phys;
+ unsigned long vsize;
+ unsigned long psize;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ lro = (struct xclmgmt_dev *)file->private_data;
+ BUG_ON(!lro);
+
+ off = vma->vm_pgoff << PAGE_SHIFT;
+ /* BAR physical address */
+ phys = pci_resource_start(lro->core.pdev, lro->core.bar_idx) + off;
+ vsize = vma->vm_end - vma->vm_start;
+ /* complete resource */
+ psize = pci_resource_end(lro->core.pdev, lro->core.bar_idx) -
+ pci_resource_start(lro->core.pdev, lro->core.bar_idx) + 1 - off;
+
+ mgmt_info(lro, "mmap(): bar %d, phys:0x%lx, vsize:%ld, psize:%ld",
+ lro->core.bar_idx, phys, vsize, psize);
+
+ if (vsize > psize)
+ return -EINVAL;
+
+ /*
+ * pages must not be cached as this would result in cache line sized
+ * accesses to the end point
+ */
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ /*
+ * prevent touching the pages (byte access) for swap-in,
+ * and prevent the pages from being swapped out
+ */
+#ifndef VM_RESERVED
+ vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
+#else
+ vma->vm_flags |= VM_IO | VM_RESERVED;
+#endif
+
+ /* make MMIO accessible to user space */
+ rc = io_remap_pfn_range(vma, vma->vm_start, phys >> PAGE_SHIFT,
+ vsize, vma->vm_page_prot);
+ if (rc)
+ return -EAGAIN;
+
+ return rc;
+}
+
+/*
+ * character device file operations for control bus (through control bridge)
+ */
+static const struct file_operations ctrl_fops = {
+ .owner = THIS_MODULE,
+ .open = char_open,
+ .release = char_close,
+ .mmap = bridge_mmap,
+ .unlocked_ioctl = mgmt_ioctl,
+};
+
+/*
+ * create_char() -- create a character device interface to data or control bus
+ *
+ * If at least one SG DMA engine is specified, the character device interface
+ * is coupled to the SG DMA file operations which operate on the data bus. If
+ * no engines are specified, the interface is coupled with the control bus.
+ */
+static int create_char(struct xclmgmt_dev *lro)
+{
+ struct xclmgmt_char *lro_char;
+ int rc;
+
+ lro_char = &lro->user_char_dev;
+
+ /* couple the control device file operations to the character device */
+ lro_char->cdev = cdev_alloc();
+ if (!lro_char->cdev)
+ return -ENOMEM;
+
+ lro_char->cdev->ops = &ctrl_fops;
+ lro_char->cdev->owner = THIS_MODULE;
+ lro_char->cdev->dev = MKDEV(MAJOR(xclmgmt_devnode), lro->core.dev_minor);
+ rc = cdev_add(lro_char->cdev, lro_char->cdev->dev, 1);
+ if (rc < 0) {
+ memset(lro_char, 0, sizeof(*lro_char));
+ mgmt_info(lro, "cdev_add() = %d\n", rc);
+ goto fail_add;
+ }
+
+ lro_char->sys_device = device_create(xrt_class,
+ &lro->core.pdev->dev,
+ lro_char->cdev->dev, NULL,
+ DRV_NAME "%d", lro->instance);
+
+ if (IS_ERR(lro_char->sys_device)) {
+ rc = PTR_ERR(lro_char->sys_device);
+ goto fail_device;
+ }
+
+ return 0;
+
+fail_device:
+ cdev_del(lro_char->cdev);
+fail_add:
+ return rc;
+}
+
+static int destroy_sg_char(struct xclmgmt_char *lro_char)
+{
+ BUG_ON(!lro_char);
+ BUG_ON(!xrt_class);
+
+ if (lro_char->sys_device)
+ device_destroy(xrt_class, lro_char->cdev->dev);
+ cdev_del(lro_char->cdev);
+
+ return 0;
+}
+
+struct pci_dev *find_user_node(const struct pci_dev *pdev)
+{
+ struct xclmgmt_dev *lro;
+ unsigned int slot = PCI_SLOT(pdev->devfn);
+ unsigned int func = PCI_FUNC(pdev->devfn);
+ struct pci_dev *user_dev;
+
+ lro = (struct xclmgmt_dev *)dev_get_drvdata(&pdev->dev);
+
+ /*
+ * if we are function one then the zero
+ * function has the user pf node
+ */
+ if (func == 0) {
+ mgmt_err(lro, "failed get user pf, expect user pf is func 0");
+ return NULL;
+ }
+
+ user_dev = pci_get_slot(pdev->bus, PCI_DEVFN(slot, 0));
+ if (!user_dev) {
+ mgmt_err(lro, "did not find user dev");
+ return NULL;
+ }
+
+ return user_dev;
+}
+
+inline void check_temp_within_range(struct xclmgmt_dev *lro, u32 temp)
+{
+ if (temp < LOW_TEMP || temp > HI_TEMP) {
+ mgmt_err(lro, "Temperature outside normal range (%d-%d) %d.",
+ LOW_TEMP, HI_TEMP, temp);
+ }
+}
+
+inline void check_volt_within_range(struct xclmgmt_dev *lro, u16 volt)
+{
+ if (volt < LOW_MILLVOLT || volt > HI_MILLVOLT) {
+ mgmt_err(lro, "Voltage outside normal range (%d-%d)mV %d.",
+ LOW_MILLVOLT, HI_MILLVOLT, volt);
+ }
+}
+
+static void check_sysmon(struct xclmgmt_dev *lro)
+{
+ u32 val;
+
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_TEMP, &val);
+ check_temp_within_range(lro, val);
+
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_INT, &val);
+ check_volt_within_range(lro, val);
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_AUX, &val);
+ check_volt_within_range(lro, val);
+ xocl_sysmon_get_prop(lro, XOCL_SYSMON_PROP_VCC_BRAM, &val);
+ check_volt_within_range(lro, val);
+}
+
+static int health_check_cb(void *data)
+{
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)data;
+ struct mailbox_req mbreq = { MAILBOX_REQ_FIREWALL, };
+ bool tripped;
+
+ if (!health_check)
+ return 0;
+
+ mutex_lock(&lro->busy_mutex);
+ tripped = xocl_af_check(lro, NULL);
+ mutex_unlock(&lro->busy_mutex);
+
+ if (!tripped) {
+ check_sysmon(lro);
+ } else {
+ mgmt_info(lro, "firewall tripped, notify peer");
+ (void) xocl_peer_notify(lro, &mbreq, sizeof(struct mailbox_req));
+ }
+
+ return 0;
+}
+
+static inline bool xclmgmt_support_intr(struct xclmgmt_dev *lro)
+{
+ return lro->core.intr_bar_addr != NULL;
+}
+
+static int xclmgmt_setup_msix(struct xclmgmt_dev *lro)
+{
+ int total, rv, i;
+
+ if (!xclmgmt_support_intr(lro))
+ return -EOPNOTSUPP;
+
+ /*
+ * Get start vector (index into msi-x table) of msi-x usr intr on this
+ * device.
+ *
+ * The device has XCLMGMT_MAX_USER_INTR number of usr intrs, the last
+ * half of them belongs to mgmt pf, and the first half to user pf. All
+ * vectors are hard-wired.
+ *
+ * The device also has some number of DMA intrs whose vectors come
+ * before usr ones.
+ *
+ * This means that mgmt pf needs to allocate msi-x table big enough to
+ * cover its own usr vectors. So, only the last chunk of the table will
+ * ever be used for mgmt pf.
+ */
+ lro->msix_user_start_vector = XOCL_READ_REG32(lro->core.intr_bar_addr +
+ XCLMGMT_INTR_USER_VECTOR) & 0x0f;
+ total = lro->msix_user_start_vector + XCLMGMT_MAX_USER_INTR;
+
+ i = 0; // Suppress warning about unused variable
+ rv = pci_alloc_irq_vectors(lro->core.pdev, total, total, PCI_IRQ_MSIX);
+ if (rv == total)
+ rv = 0;
+ mgmt_info(lro, "setting up msix, total irqs: %d, rv=%d\n", total, rv);
+ return rv;
+}
+
+static void xclmgmt_teardown_msix(struct xclmgmt_dev *lro)
+{
+ if (xclmgmt_support_intr(lro))
+ pci_disable_msix(lro->core.pdev);
+}
+
+static int xclmgmt_intr_config(xdev_handle_t xdev_hdl, u32 intr, bool en)
+{
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)xdev_hdl;
+
+ if (!xclmgmt_support_intr(lro))
+ return -EOPNOTSUPP;
+
+ XOCL_WRITE_REG32(1 << intr, lro->core.intr_bar_addr +
+ (en ? XCLMGMT_INTR_USER_ENABLE : XCLMGMT_INTR_USER_DISABLE));
+ return 0;
+}
+
+static int xclmgmt_intr_register(xdev_handle_t xdev_hdl, u32 intr,
+ irq_handler_t handler, void *arg)
+{
+ u32 vec;
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)xdev_hdl;
+
+ if (!xclmgmt_support_intr(lro))
+ return -EOPNOTSUPP;
+
+ vec = pci_irq_vector(lro->core.pdev,
+ lro->msix_user_start_vector + intr);
+
+ if (handler)
+ return request_irq(vec, handler, 0, DRV_NAME, arg);
+
+ free_irq(vec, arg);
+ return 0;
+}
+
+static int xclmgmt_reset(xdev_handle_t xdev_hdl)
+{
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)xdev_hdl;
+
+ return reset_hot_ioctl(lro);
+}
+
+struct xocl_pci_funcs xclmgmt_pci_ops = {
+ .intr_config = xclmgmt_intr_config,
+ .intr_register = xclmgmt_intr_register,
+ .reset = xclmgmt_reset,
+};
+
+static int xclmgmt_read_subdev_req(struct xclmgmt_dev *lro, char *data_ptr, void **resp, size_t *sz)
+{
+ uint64_t val = 0;
+ size_t resp_sz = 0;
+ void *ptr = NULL;
+ struct mailbox_subdev_peer *subdev_req = (struct mailbox_subdev_peer *)data_ptr;
+
+ switch (subdev_req->kind) {
+ case VOL_12V_PEX:
+ val = xocl_xmc_get_data(lro, subdev_req->kind);
+ resp_sz = sizeof(u32);
+ ptr = (void *)&val;
+ break;
+ case IDCODE:
+ val = xocl_icap_get_data(lro, subdev_req->kind);
+ resp_sz = sizeof(u32);
+ ptr = (void *)&val;
+ break;
+ case XCLBIN_UUID:
+ ptr = (void *)xocl_icap_get_data(lro, subdev_req->kind);
+ resp_sz = sizeof(uuid_t);
+ break;
+ default:
+ break;
+ }
+
+ if (!resp_sz)
+ return -EINVAL;
+
+ *resp = vmalloc(resp_sz);
+ if (*resp == NULL)
+ return -ENOMEM;
+
+ memcpy(*resp, ptr, resp_sz);
+ *sz = resp_sz;
+ return 0;
+}
+
+static void xclmgmt_mailbox_srv(void *arg, void *data, size_t len,
+ u64 msgid, int err)
+{
+ int ret = 0;
+ size_t sz = 0;
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)arg;
+ struct mailbox_req *req = (struct mailbox_req *)data;
+ struct mailbox_req_bitstream_lock *bitstm_lock = NULL;
+ struct mailbox_bitstream_kaddr *mb_kaddr = NULL;
+ void *resp = NULL;
+
+ bitstm_lock = (struct mailbox_req_bitstream_lock *)req->data;
+
+ if (err != 0)
+ return;
+
+ mgmt_info(lro, "%s received request (%d) from peer\n", __func__, req->req);
+
+ switch (req->req) {
+ case MAILBOX_REQ_LOCK_BITSTREAM:
+ ret = xocl_icap_lock_bitstream(lro, &bitstm_lock->uuid,
+ 0);
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ break;
+ case MAILBOX_REQ_UNLOCK_BITSTREAM:
+ ret = xocl_icap_unlock_bitstream(lro, &bitstm_lock->uuid,
+ 0);
+ break;
+ case MAILBOX_REQ_HOT_RESET:
+ ret = (int) reset_hot_ioctl(lro);
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ break;
+ case MAILBOX_REQ_LOAD_XCLBIN_KADDR:
+ mb_kaddr = (struct mailbox_bitstream_kaddr *)req->data;
+ ret = xocl_icap_download_axlf(lro, (void *)mb_kaddr->addr);
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ break;
+ case MAILBOX_REQ_LOAD_XCLBIN:
+ ret = xocl_icap_download_axlf(lro, req->data);
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ break;
+ case MAILBOX_REQ_RECLOCK:
+ ret = xocl_icap_ocl_update_clock_freq_topology(lro, (struct xclmgmt_ioc_freqscaling *)req->data);
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ break;
+ case MAILBOX_REQ_PEER_DATA:
+ ret = xclmgmt_read_subdev_req(lro, req->data, &resp, &sz);
+ if (ret) {
+ /* if can't get data, return 0 as response */
+ ret = 0;
+ (void) xocl_peer_response(lro, msgid, &ret, sizeof(ret));
+ } else
+ (void) xocl_peer_response(lro, msgid, resp, sz);
+ vfree(resp);
+ break;
+ default:
+ break;
+ }
+}
+
+/*
+ * Called after minimum initialization is done. Should not return failure.
+ * If something goes wrong, it should clean up and return back to minimum
+ * initialization stage.
+ */
+static void xclmgmt_extended_probe(struct xclmgmt_dev *lro)
+{
+ int ret;
+ struct xocl_board_private *dev_info = &lro->core.priv;
+ struct pci_dev *pdev = lro->pci_dev;
+
+ /* We can only support MSI-X. */
+ ret = xclmgmt_setup_msix(lro);
+ if (ret && (ret != -EOPNOTSUPP)) {
+ xocl_err(&pdev->dev, "set up MSI-X failed\n");
+ goto fail;
+ }
+ lro->core.pci_ops = &xclmgmt_pci_ops;
+ lro->core.pdev = pdev;
+
+ /*
+ * Workaround needed on some platforms. Will clear out any stale
+ * data after the platform has been reset
+ */
+ ret = xocl_subdev_create_one(lro,
+ &(struct xocl_subdev_info)XOCL_DEVINFO_AF);
+ if (ret) {
+ xocl_err(&pdev->dev, "failed to register firewall\n");
+ goto fail_firewall;
+ }
+ if (dev_info->flags & XOCL_DSAFLAG_AXILITE_FLUSH)
+ platform_axilite_flush(lro);
+
+ ret = xocl_subdev_create_all(lro, dev_info->subdev_info,
+ dev_info->subdev_num);
+ if (ret) {
+ xocl_err(&pdev->dev, "failed to register subdevs\n");
+ goto fail_all_subdev;
+ }
+ xocl_err(&pdev->dev, "created all sub devices");
+
+ ret = xocl_icap_download_boot_firmware(lro);
+ if (ret)
+ goto fail_all_subdev;
+
+ lro->core.thread_arg.health_cb = health_check_cb;
+ lro->core.thread_arg.arg = lro;
+ lro->core.thread_arg.interval = health_interval * 1000;
+
+ health_thread_start(lro);
+
+ /* Launch the mailbox server. */
+ (void) xocl_peer_listen(lro, xclmgmt_mailbox_srv, (void *)lro);
+
+ lro->ready = true;
+ xocl_err(&pdev->dev, "device fully initialized\n");
+ return;
+
+fail_all_subdev:
+ xocl_subdev_destroy_all(lro);
+fail_firewall:
+ xclmgmt_teardown_msix(lro);
+fail:
+ xocl_err(&pdev->dev, "failed to fully probe device, err: %d\n", ret);
+}
+
+/*
+ * Device initialization is done in two phases:
+ * 1. Minimum initialization - init to the point where open/close/mmap entry
+ * points are working, sysfs entries work without register access, ioctl entry
+ * point is completely disabled.
+ * 2. Full initialization - driver is ready for use.
+ * Once we pass minimum initialization point, probe function shall not fail.
+ */
+static int xclmgmt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int rc = 0;
+ struct xclmgmt_dev *lro = NULL;
+ struct xocl_board_private *dev_info;
+
+ xocl_info(&pdev->dev, "Driver: %s", XRT_DRIVER_VERSION);
+ xocl_info(&pdev->dev, "probe(pdev = 0x%p, pci_id = 0x%p)\n", pdev, id);
+
+ rc = pci_enable_device(pdev);
+ if (rc) {
+ xocl_err(&pdev->dev, "pci_enable_device() failed, rc = %d.\n",
+ rc);
+ return rc;
+ }
+
+ /* allocate zeroed device book keeping structure */
+ lro = xocl_drvinst_alloc(&pdev->dev, sizeof(struct xclmgmt_dev));
+ if (!lro) {
+ xocl_err(&pdev->dev, "Could not kzalloc(xclmgmt_dev).\n");
+ rc = -ENOMEM;
+ goto err_alloc;
+ }
+
+ /* create a device to driver reference */
+ dev_set_drvdata(&pdev->dev, lro);
+ /* create a driver to device reference */
+ lro->core.pdev = pdev;
+ lro->pci_dev = pdev;
+ lro->ready = false;
+
+ rc = pcie_get_readrq(pdev);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to read mrrs %d\n", rc);
+ goto err_alloc;
+ }
+ if (rc > 512) {
+ rc = pcie_set_readrq(pdev, 512);
+ if (rc) {
+ dev_err(&pdev->dev, "failed to force mrrs %d\n", rc);
+ goto err_alloc;
+ }
+ }
+
+ rc = xocl_alloc_dev_minor(lro);
+ if (rc)
+ goto err_alloc_minor;
+
+ dev_info = (struct xocl_board_private *)id->driver_data;
+ xocl_fill_dsa_priv(lro, dev_info);
+
+ /* map BARs */
+ rc = map_bars(lro);
+ if (rc)
+ goto err_map;
+
+ lro->instance = XOCL_DEV_ID(pdev);
+ rc = create_char(lro);
+ if (rc) {
+ xocl_err(&pdev->dev, "create_char(user_char_dev) failed\n");
+ goto err_cdev;
+ }
+
+ xocl_drvinst_set_filedev(lro, lro->user_char_dev.cdev);
+
+ mutex_init(&lro->busy_mutex);
+
+ mgmt_init_sysfs(&pdev->dev);
+
+ /* Probe will not fail from now on. */
+ xocl_err(&pdev->dev, "minimum initialization done\n");
+
+ /* No further initialization for MFG board. */
+ if (minimum_initialization ||
+ (dev_info->flags & XOCL_DSAFLAG_MFG) != 0) {
+ return 0;
+ }
+
+ xclmgmt_extended_probe(lro);
+
+ return 0;
+
+err_cdev:
+ unmap_bars(lro);
+err_map:
+ xocl_free_dev_minor(lro);
+err_alloc_minor:
+ dev_set_drvdata(&pdev->dev, NULL);
+ xocl_drvinst_free(lro);
+err_alloc:
+ pci_disable_device(pdev);
+
+ return rc;
+}
+
+static void xclmgmt_remove(struct pci_dev *pdev)
+{
+ struct xclmgmt_dev *lro;
+
+ if ((pdev == 0) || (dev_get_drvdata(&pdev->dev) == 0))
+ return;
+
+ lro = (struct xclmgmt_dev *)dev_get_drvdata(&pdev->dev);
+ mgmt_info(lro, "remove(0x%p) where pdev->dev.driver_data = 0x%p",
+ pdev, lro);
+ BUG_ON(lro->core.pdev != pdev);
+
+ health_thread_stop(lro);
+
+ mgmt_fini_sysfs(&pdev->dev);
+
+ xocl_subdev_destroy_all(lro);
+
+ xclmgmt_teardown_msix(lro);
+ /* remove user character device */
+ destroy_sg_char(&lro->user_char_dev);
+
+ /* unmap the BARs */
+ unmap_bars(lro);
+ pci_disable_device(pdev);
+
+ xocl_free_dev_minor(lro);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ xocl_drvinst_free(lro);
+}
+
+static pci_ers_result_t mgmt_pci_error_detected(struct pci_dev *pdev,
+ pci_channel_state_t state)
+{
+ switch (state) {
+ case pci_channel_io_normal:
+ xocl_info(&pdev->dev, "PCI normal state error\n");
+ return PCI_ERS_RESULT_CAN_RECOVER;
+ case pci_channel_io_frozen:
+ xocl_info(&pdev->dev, "PCI frozen state error\n");
+ return PCI_ERS_RESULT_NEED_RESET;
+ case pci_channel_io_perm_failure:
+ xocl_info(&pdev->dev, "PCI failure state error\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ default:
+ xocl_info(&pdev->dev, "PCI unknown state %d error\n", state);
+ break;
+ }
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static const struct pci_error_handlers xclmgmt_err_handler = {
+ .error_detected = mgmt_pci_error_detected,
+};
+
+static struct pci_driver xclmgmt_driver = {
+ .name = DRV_NAME,
+ .id_table = pci_ids,
+ .probe = xclmgmt_probe,
+ .remove = xclmgmt_remove,
+ /* resume, suspend are optional */
+ .err_handler = &xclmgmt_err_handler,
+};
+
+static int (*drv_reg_funcs[])(void) __initdata = {
+ xocl_init_feature_rom,
+ xocl_init_sysmon,
+ xocl_init_mb,
+ xocl_init_xvc,
+ xocl_init_mailbox,
+ xocl_init_firewall,
+ xocl_init_icap,
+ xocl_init_mig,
+ xocl_init_xmc,
+ xocl_init_dna,
+ xocl_init_fmgr,
+};
+
+static void (*drv_unreg_funcs[])(void) = {
+ xocl_fini_feature_rom,
+ xocl_fini_sysmon,
+ xocl_fini_mb,
+ xocl_fini_xvc,
+ xocl_fini_mailbox,
+ xocl_fini_firewall,
+ xocl_fini_icap,
+ xocl_fini_mig,
+ xocl_fini_xmc,
+ xocl_fini_dna,
+ xocl_fini_fmgr,
+};
+
+static int __init xclmgmt_init(void)
+{
+ int res, i;
+
+ pr_info(DRV_NAME " init()\n");
+ xrt_class = class_create(THIS_MODULE, "xrt_mgmt");
+ if (IS_ERR(xrt_class))
+ return PTR_ERR(xrt_class);
+
+ res = alloc_chrdev_region(&xclmgmt_devnode, 0,
+ XOCL_MAX_DEVICES, DRV_NAME);
+ if (res)
+ goto alloc_err;
+
+ /* Need to init sub device driver before pci driver register */
+ for (i = 0; i < ARRAY_SIZE(drv_reg_funcs); ++i) {
+ res = drv_reg_funcs[i]();
+ if (res)
+ goto drv_init_err;
+ }
+
+ res = pci_register_driver(&xclmgmt_driver);
+ if (res)
+ goto reg_err;
+
+ return 0;
+
+drv_init_err:
+reg_err:
+ for (i--; i >= 0; i--)
+ drv_unreg_funcs[i]();
+
+ unregister_chrdev_region(xclmgmt_devnode, XOCL_MAX_DEVICES);
+alloc_err:
+ pr_info(DRV_NAME " init() err\n");
+ class_destroy(xrt_class);
+ return res;
+}
+
+static void xclmgmt_exit(void)
+{
+ int i;
+
+ pr_info(DRV_NAME" exit()\n");
+ pci_unregister_driver(&xclmgmt_driver);
+
+ for (i = ARRAY_SIZE(drv_unreg_funcs) - 1; i >= 0; i--)
+ drv_unreg_funcs[i]();
+
+ /* unregister this driver from the PCI bus driver */
+ unregister_chrdev_region(xclmgmt_devnode, XOCL_MAX_DEVICES);
+ class_destroy(xrt_class);
+}
+
+module_init(xclmgmt_init);
+module_exit(xclmgmt_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Lizhi Hou <lizhi.hou@...inx.com>");
+MODULE_VERSION(XRT_DRIVER_VERSION);
+MODULE_DESCRIPTION("Xilinx SDx management function driver");
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.h b/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.h
new file mode 100644
index 000000000000..14ef10e21e00
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-core.h
@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/**
+ * Copyright (C) 2017-2019 Xilinx, Inc.
+ *
+ * Author(s):
+ * Sonal Santan <sonal.santan@...inx.com>
+ */
+
+#ifndef _XCL_MGT_PF_H_
+#define _XCL_MGT_PF_H_
+
+#include <linux/cdev.h>
+#include <linux/list.h>
+#include <linux/signal.h>
+#include <linux/init_task.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/time.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <drm/xmgmt_drm.h>
+#include "mgmt-reg.h"
+#include "../xclfeatures.h"
+#include "../xocl_drv.h"
+
+#define DRV_NAME "xmgmt"
+
+#define MGMT_READ_REG32(lro, off) \
+ ioread32(lro->core.bar_addr + off)
+#define MGMT_WRITE_REG32(lro, off, val) \
+ iowrite32(val, lro->core.bar_addr + off)
+#define MGMT_WRITE_REG8(lro, off, val) \
+ iowrite8(val, lro->core.bar_addr + off)
+
+#define mgmt_err(lro, fmt, args...) \
+ dev_err(&lro->core.pdev->dev, "%s: "fmt, __func__, ##args)
+#define mgmt_info(lro, fmt, args...) \
+ dev_info(&lro->core.pdev->dev, "%s: "fmt, __func__, ##args)
+
+#define MGMT_PROC_TABLE_HASH_SZ 256
+
+struct xclmgmt_ioc_info;
+
+// List of processes that are using the mgmt driver
+// also saving the task
+struct proc_list {
+ struct list_head head;
+ struct pid *pid;
+ bool signaled;
+};
+
+struct power_val {
+ s32 max;
+ s32 avg;
+ s32 curr;
+};
+
+struct mgmt_power {
+ struct power_val vccint;
+ struct power_val vcc1v8;
+ struct power_val vcc1v2;
+ struct power_val vccbram;
+ struct power_val mgtavcc;
+ struct power_val mgtavtt;
+};
+
+struct xclmgmt_proc_ctx {
+ struct xclmgmt_dev *lro;
+ struct pid *pid;
+ bool signaled;
+};
+
+struct xclmgmt_char {
+ struct xclmgmt_dev *lro;
+ struct cdev *cdev;
+ struct device *sys_device;
+};
+
+struct xclmgmt_data_buf {
+ enum mb_cmd_type cmd_type;
+ uint64_t priv_data;
+ char *data_buf;
+};
+
+struct xclmgmt_dev {
+ struct xocl_dev_core core;
+ /* MAGIC_DEVICE == 0xAAAAAAAA */
+ unsigned long magic;
+
+ /* the kernel pci device data structure provided by probe() */
+ struct pci_dev *pci_dev;
+ int instance;
+ struct xclmgmt_char user_char_dev;
+ int axi_gate_frozen;
+ unsigned short ocl_frequency[4];
+
+ struct mutex busy_mutex;
+ struct mgmt_power power;
+
+ int msix_user_start_vector;
+ bool ready;
+
+};
+
+extern int health_check;
+
+int ocl_freqscaling_ioctl(struct xclmgmt_dev *lro, const void __user *arg);
+void platform_axilite_flush(struct xclmgmt_dev *lro);
+u16 get_dsa_version(struct xclmgmt_dev *lro);
+void fill_frequency_info(struct xclmgmt_dev *lro, struct xclmgmt_ioc_info *obj);
+void device_info(struct xclmgmt_dev *lro, struct xclmgmt_ioc_info *obj);
+long mgmt_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
+void get_pcie_link_info(struct xclmgmt_dev *lro,
+ unsigned short *width, unsigned short *speed, bool is_cap);
+
+// utils.c
+unsigned int compute_unit_busy(struct xclmgmt_dev *lro);
+int pci_fundamental_reset(struct xclmgmt_dev *lro);
+
+long reset_hot_ioctl(struct xclmgmt_dev *lro);
+void xdma_reset(struct pci_dev *pdev, bool prepare);
+void xclmgmt_reset_pci(struct xclmgmt_dev *lro);
+
+// firewall.c
+void init_firewall(struct xclmgmt_dev *lro);
+void xclmgmt_killall_processes(struct xclmgmt_dev *lro);
+void xclmgmt_list_add(struct xclmgmt_dev *lro, struct pid *new_pid);
+void xclmgmt_list_remove(struct xclmgmt_dev *lro, struct pid *remove_pid);
+void xclmgmt_list_del(struct xclmgmt_dev *lro);
+bool xclmgmt_check_proc(struct xclmgmt_dev *lro, struct pid *pid);
+
+// mgmt-xvc.c
+long xvc_ioctl(struct xclmgmt_dev *lro, const void __user *arg);
+
+//mgmt-sysfs.c
+int mgmt_init_sysfs(struct device *dev);
+void mgmt_fini_sysfs(struct device *dev);
+
+//mgmt-mb.c
+int mgmt_init_mb(struct xclmgmt_dev *lro);
+void mgmt_fini_mb(struct xclmgmt_dev *lro);
+int mgmt_start_mb(struct xclmgmt_dev *lro);
+int mgmt_stop_mb(struct xclmgmt_dev *lro);
+
+#endif
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-cw.c b/drivers/gpu/drm/xocl/mgmtpf/mgmt-cw.c
new file mode 100644
index 000000000000..5e60db260b37
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-cw.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/**
+ * Copyright (C) 2017-2019 Xilinx, Inc. All rights reserved.
+ *
+ * Code borrowed from Xilinx SDAccel XDMA driver
+ * Author: Umang Parekh
+ *
+ */
+
+#include "mgmt-core.h"
+
+int ocl_freqscaling_ioctl(struct xclmgmt_dev *lro, const void __user *arg)
+{
+ struct xclmgmt_ioc_freqscaling freq_obj;
+
+ mgmt_info(lro, "%s called", __func__);
+
+ if (copy_from_user((void *)&freq_obj, arg,
+ sizeof(struct xclmgmt_ioc_freqscaling)))
+ return -EFAULT;
+
+ return xocl_icap_ocl_update_clock_freq_topology(lro, &freq_obj);
+}
+
+void fill_frequency_info(struct xclmgmt_dev *lro, struct xclmgmt_ioc_info *obj)
+{
+ (void) xocl_icap_ocl_get_freq(lro, 0, obj->ocl_frequency,
+ ARRAY_SIZE(obj->ocl_frequency));
+}
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-ioctl.c b/drivers/gpu/drm/xocl/mgmtpf/mgmt-ioctl.c
new file mode 100644
index 000000000000..bd53b6997d2a
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-ioctl.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/**
+ * Copyright (C) 2017 Xilinx, Inc. All rights reserved.
+ * Author: Sonal Santan
+ * Code copied verbatim from SDAccel xcldma kernel mode driver
+ */
+
+#include "mgmt-core.h"
+
+static int err_info_ioctl(struct xclmgmt_dev *lro, void __user *arg)
+{
+ struct xclmgmt_err_info obj;
+ u32 val, level;
+ u64 t;
+ int i;
+
+ mgmt_info(lro, "Enter error_info IOCTL");
+
+ xocl_af_get_prop(lro, XOCL_AF_PROP_TOTAL_LEVEL, &val);
+ if (val > ARRAY_SIZE(obj.mAXIErrorStatus)) {
+ mgmt_err(lro, "Too many levels %d", val);
+ return -EINVAL;
+ }
+
+ obj.mNumFirewalls = val;
+ memset(obj.mAXIErrorStatus, 0, sizeof(obj.mAXIErrorStatus));
+ for (i = 0; i < obj.mNumFirewalls; ++i)
+ obj.mAXIErrorStatus[i].mErrFirewallID = i;
+
+ xocl_af_get_prop(lro, XOCL_AF_PROP_DETECTED_LEVEL, &level);
+ if (level >= val) {
+ mgmt_err(lro, "Invalid detected level %d", level);
+ return -EINVAL;
+ }
+ obj.mAXIErrorStatus[level].mErrFirewallID = level;
+
+ xocl_af_get_prop(lro, XOCL_AF_PROP_DETECTED_STATUS, &val);
+ obj.mAXIErrorStatus[level].mErrFirewallStatus = val;
+
+ xocl_af_get_prop(lro, XOCL_AF_PROP_DETECTED_TIME, &t);
+ obj.mAXIErrorStatus[level].mErrFirewallTime = t;
+
+ if (copy_to_user(arg, &obj, sizeof(struct xclErrorStatus)))
+ return -EFAULT;
+ return 0;
+}
+
+static int version_ioctl(struct xclmgmt_dev *lro, void __user *arg)
+{
+ struct xclmgmt_ioc_info obj;
+
+ mgmt_info(lro, "%s: %s\n", DRV_NAME, __func__);
+ device_info(lro, &obj);
+ if (copy_to_user(arg, &obj, sizeof(struct xclmgmt_ioc_info)))
+ return -EFAULT;
+ return 0;
+}
+
+static long reset_ocl_ioctl(struct xclmgmt_dev *lro)
+{
+ xocl_icap_reset_axi_gate(lro);
+ return compute_unit_busy(lro) ? -EBUSY : 0;
+}
+
+static int bitstream_ioctl_axlf(struct xclmgmt_dev *lro, const void __user *arg)
+{
+ void *copy_buffer = NULL;
+ size_t copy_buffer_size = 0;
+ struct xclmgmt_ioc_bitstream_axlf ioc_obj = { 0 };
+ struct axlf xclbin_obj = { 0 };
+ int ret = 0;
+
+ if (copy_from_user((void *)&ioc_obj, arg, sizeof(ioc_obj)))
+ return -EFAULT;
+ if (copy_from_user((void *)&xclbin_obj, ioc_obj.xclbin,
+ sizeof(xclbin_obj)))
+ return -EFAULT;
+
+ copy_buffer_size = xclbin_obj.m_header.m_length;
+ copy_buffer = vmalloc(copy_buffer_size);
+ if (copy_buffer == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user((void *)copy_buffer, ioc_obj.xclbin,
+ copy_buffer_size))
+ ret = -EFAULT;
+ else
+ ret = xocl_icap_download_axlf(lro, copy_buffer);
+
+ vfree(copy_buffer);
+ return ret;
+}
+
+long mgmt_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct xclmgmt_dev *lro = (struct xclmgmt_dev *)filp->private_data;
+ long result = 0;
+
+ BUG_ON(!lro);
+
+ if (!lro->ready || _IOC_TYPE(cmd) != XCLMGMT_IOC_MAGIC)
+ return -ENOTTY;
+
+ if (_IOC_DIR(cmd) & _IOC_READ)
+ result = !access_ok((void __user *)arg, _IOC_SIZE(cmd));
+ else if (_IOC_DIR(cmd) & _IOC_WRITE)
+ result = !access_ok((void __user *)arg, _IOC_SIZE(cmd));
+
+ if (result)
+ return -EFAULT;
+
+ mutex_lock(&lro->busy_mutex);
+
+ switch (cmd) {
+ case XCLMGMT_IOCINFO:
+ result = version_ioctl(lro, (void __user *)arg);
+ break;
+ case XCLMGMT_IOCICAPDOWNLOAD:
+ mgmt_err(lro, "Bitstream ioctl with legacy bitstream not supported");
+ result = -EINVAL;
+ break;
+ case XCLMGMT_IOCICAPDOWNLOAD_AXLF:
+ result = bitstream_ioctl_axlf(lro, (void __user *)arg);
+ break;
+ case XCLMGMT_IOCOCLRESET:
+ result = reset_ocl_ioctl(lro);
+ break;
+ case XCLMGMT_IOCHOTRESET:
+ result = reset_hot_ioctl(lro);
+ break;
+ case XCLMGMT_IOCFREQSCALE:
+ result = ocl_freqscaling_ioctl(lro, (void __user *)arg);
+ break;
+ case XCLMGMT_IOCREBOOT:
+ result = capable(CAP_SYS_ADMIN) ? pci_fundamental_reset(lro) : -EACCES;
+ break;
+ case XCLMGMT_IOCERRINFO:
+ result = err_info_ioctl(lro, (void __user *)arg);
+ break;
+ default:
+ mgmt_info(lro, "MGMT default IOCTL request %u\n", cmd & 0xff);
+ result = -ENOTTY;
+ }
+
+ mutex_unlock(&lro->busy_mutex);
+ return result;
+}
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-reg.h b/drivers/gpu/drm/xocl/mgmtpf/mgmt-reg.h
new file mode 100644
index 000000000000..cff012c98673
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-reg.h
@@ -0,0 +1,244 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */
+
+/**
+ * Copyright (C) 2016-2019 Xilinx, Inc
+ */
+
+#ifndef _XCL_MGT_REG_H_
+#define _XCL_MGT_REG_H_
+
+
+#define KB(x) ((unsigned int) (x) << 10)
+#define MB(x) ((unsigned int) (x) << 20)
+
+enum PFO_BARS {
+ USER_BAR = 0,
+ DMA_BAR,
+ MAX_BAR
+};
+
+/**
+ * Peripherals on AXI-Lite mapped to PCIe BAR
+ */
+
+#define XILINX_VENDOR_ID 0x10EE
+#define OCL_CU_CTRL_RANGE KB(4)
+
+#define DDR_BUFFER_ALIGNMENT 0x40
+#define MMAP_SIZE_USER MB(32)
+
+//parameters for HWICAP, Flash and APM on PCIe BAR
+#define HWICAP_OFFSET 0x020000
+#define AXI_GATE_OFFSET 0x030000
+#define AXI_GATE_OFFSET_READ 0x030008
+#define BPI_FLASH_OFFSET 0x040000
+
+//Base addresses for LAPC
+#define LAPC0_BASE 0x00120000 //ocl master00
+#define LAPC1_BASE 0x00121000 //ocl master01
+#define LAPC2_BASE 0x00122000 //ocl master02
+#define LAPC3_BASE 0x00123000 //ocl master03
+
+//Following status registers are available at each base
+#define LAPC_OVERALL_STATUS_OFFSET 0x0
+#define LAPC_CUMULATIVE_STATUS_0_OFFSET 0x100
+#define LAPC_CUMULATIVE_STATUS_1_OFFSET 0x104
+#define LAPC_CUMULATIVE_STATUS_2_OFFSET 0x108
+#define LAPC_CUMULATIVE_STATUS_3_OFFSET 0x10c
+
+#define LAPC_SNAPSHOT_STATUS_0_OFFSET 0x200
+#define LAPC_SNAPSHOT_STATUS_1_OFFSET 0x204
+#define LAPC_SNAPSHOT_STATUS_2_OFFSET 0x208
+#define LAPC_SNAPSHOT_STATUS_3_OFFSET 0x20c
+
+// NOTE: monitor address offset now defined by PERFMON0_BASE
+#define PERFMON0_OFFSET 0x0
+#define PERFMON1_OFFSET 0x020000
+#define PERFMON2_OFFSET 0x010000
+
+#define PERFMON_START_OFFSET 0x2000
+#define PERFMON_RANGE 0x1000
+
+#define FEATURE_ROM_BASE 0x0B0000
+#define OCL_CTLR_BASE 0x000000
+#define HWICAP_BASE 0x020000
+#define AXI_GATE_BASE 0x030000
+#define AXI_GATE_BASE_RD_BASE 0x030008
+#define FEATURE_ID_BASE 0x031000
+#define GENERAL_STATUS_BASE 0x032000
+#define AXI_I2C_BASE 0x041000
+#define PERFMON0_BASE 0x100000
+#define PERFMON0_BASE2 0x1800000
+#define OCL_CLKWIZ0_BASE 0x050000
+#define OCL_CLKWIZ1_BASE 0x051000
+/* Only needed for workaround for 5.0 platforms */
+#define GPIO_NULL_BASE 0x1FFF000
+
+
+#define OCL_CLKWIZ_STATUS_OFFSET 0x4
+#define OCL_CLKWIZ_CONFIG_OFFSET(n) (0x200 + 4 * (n))
+
+/**
+ * AXI Firewall Register definition
+ */
+#define FIREWALL_MGMT_CONTROL_BASE 0xD0000
+#define FIREWALL_USER_CONTROL_BASE 0xE0000
+#define FIREWALL_DATAPATH_BASE 0xF0000
+
+#define AF_MI_FAULT_STATUS_OFFSET 0x0 //MI Fault Status Register
+#define AF_MI_SOFT_CTRL_OFFSET 0x4 //MI Soft Fault Control Register
+#define AF_UNBLOCK_CTRL_OFFSET 0x8 //MI Unblock Control Register
+
+// Currently un-used regs from the Firewall IP.
+#define AF_MAX_CONTINUOUS_RTRANSFERS_WAITS 0x30 //MAX_CONTINUOUS_RTRANSFERS_WAITS
+#define AF_MAX_WRITE_TO_BVALID_WAITS 0x34 //MAX_WRITE_TO_BVALID_WAITS
+#define AF_MAX_ARREADY_WAITS 0x38 //MAX_ARREADY_WAITS
+#define AF_MAX_AWREADY_WAITS 0x3c //MAX_AWREADY_WAITS
+#define AF_MAX_WREADY_WAITS 0x40 //MAX_WREADY_WAITS
+
+/**
+ * DDR Zero IP Register definition
+ */
+//#define ENABLE_DDR_ZERO_IP
+#define DDR_ZERO_BASE 0x0B0000
+#define DDR_ZERO_CONFIG_REG_OFFSET 0x10
+#define DDR_ZERO_CTRL_REG_OFFSET 0x0
+
+
+/**
+ * SYSMON Register definition
+ */
+#define SYSMON_BASE 0x0A0000
+#define SYSMON_TEMP 0x400 // TEMPOERATURE REGISTER ADDRESS
+#define SYSMON_VCCINT 0x404 // VCCINT REGISTER OFFSET
+#define SYSMON_VCCAUX 0x408 // VCCAUX REGISTER OFFSET
+#define SYSMON_VCCBRAM 0x418 // VCCBRAM REGISTER OFFSET
+#define SYSMON_TEMP_MAX 0x480
+#define SYSMON_VCCINT_MAX 0x484
+#define SYSMON_VCCAUX_MAX 0x488
+#define SYSMON_VCCBRAM_MAX 0x48c
+#define SYSMON_TEMP_MIN 0x490
+#define SYSMON_VCCINT_MIN 0x494
+#define SYSMON_VCCAUX_MIN 0x498
+#define SYSMON_VCCBRAM_MIN 0x49c
+
+#define SYSMON_TO_MILLDEGREE(val) \
+ (((int64_t)(val) * 501374 >> 16) - 273678)
+#define SYSMON_TO_MILLVOLT(val) \
+ ((val) * 1000 * 3 >> 16)
+
+
+/**
+ * ICAP Register definition
+ */
+
+#define XHWICAP_GIER (HWICAP_BASE+0x1c)
+#define XHWICAP_ISR (HWICAP_BASE+0x20)
+#define XHWICAP_IER (HWICAP_BASE+0x28)
+#define XHWICAP_WF (HWICAP_BASE+0x100)
+#define XHWICAP_RF (HWICAP_BASE+0x104)
+#define XHWICAP_SZ (HWICAP_BASE+0x108)
+#define XHWICAP_CR (HWICAP_BASE+0x10c)
+#define XHWICAP_SR (HWICAP_BASE+0x110)
+#define XHWICAP_WFV (HWICAP_BASE+0x114)
+#define XHWICAP_RFO (HWICAP_BASE+0x118)
+#define XHWICAP_ASR (HWICAP_BASE+0x11c)
+
+/* Used for parsing bitstream header */
+#define XHI_EVEN_MAGIC_BYTE 0x0f
+#define XHI_ODD_MAGIC_BYTE 0xf0
+
+/* Extra mode for IDLE */
+#define XHI_OP_IDLE -1
+
+#define XHI_BIT_HEADER_FAILURE -1
+
+/* The imaginary module length register */
+#define XHI_MLR 15
+
+#define DMA_HWICAP_BITFILE_BUFFER_SIZE 1024
+
+/*
+ * Flash programming constants
+ * XAPP 518
+ * http://www.xilinx.com/support/documentation/application_notes/xapp518-isp-bpi-prom-virtex-6-pcie.pdf
+ * Table 1
+ */
+
+#define START_ADDR_HI_CMD 0x53420000
+#define START_ADDR_CMD 0x53410000
+#define END_ADDR_CMD 0x45000000
+#define END_ADDR_HI_CMD 0x45420000
+#define UNLOCK_CMD 0x556E6C6B
+#define ERASE_CMD 0x45726173
+#define PROGRAM_CMD 0x50726F67
+#define VERSION_CMD 0x55726F73
+
+#define READY_STAT 0x00008000
+#define ERASE_STAT 0x00000000
+#define PROGRAM_STAT 0x00000080
+
+/*
+ * Booting FPGA from PROM
+ * http://www.xilinx.com/support/documentation/user_guides/ug470_7Series_Config.pdf
+ * Table 7.1
+ */
+
+#define DUMMY_WORD 0xFFFFFFFF
+#define SYNC_WORD 0xAA995566
+#define TYPE1_NOOP 0x20000000
+#define TYPE1_WRITE_WBSTAR 0x30020001
+#define WBSTAR_ADD10 0x00000000
+#define WBSTAR_ADD11 0x01000000
+#define TYPE1_WRITE_CMD 0x30008001
+#define IPROG_CMD 0x0000000F
+
+/*
+ * MicroBlaze definition
+ */
+
+#define MB_REG_BASE 0x120000
+#define MB_GPIO 0x131000
+#define MB_IMAGE_MGMT 0x140000
+#define MB_IMAGE_SCHE 0x160000
+
+#define MB_REG_VERSION (MB_REG_BASE)
+#define MB_REG_ID (MB_REG_BASE + 0x4)
+#define MB_REG_STATUS (MB_REG_BASE + 0x8)
+#define MB_REG_ERR (MB_REG_BASE + 0xC)
+#define MB_REG_CAP (MB_REG_BASE + 0x10)
+#define MB_REG_CTL (MB_REG_BASE + 0x18)
+#define MB_REG_STOP_CONFIRM (MB_REG_BASE + 0x1C)
+#define MB_REG_CURR_BASE (MB_REG_BASE + 0x20)
+#define MB_REG_POW_CHK (MB_REG_BASE + 0x1A4)
+
+#define MB_CTL_MASK_STOP 0x8
+#define MB_CTL_MASK_PAUSE 0x4
+#define MB_CTL_MASK_CLEAR_ERR 0x2
+#define MB_CTL_MASK_CLEAR_POW 0x1
+
+#define MB_STATUS_MASK_INIT_DONE 0x1
+#define MB_STATUS_MASK_STOPPED 0x2
+#define MB_STATUS_MASK_PAUSED 0x4
+
+#define MB_CAP_MASK_PM 0x1
+
+#define MB_VALID_ID 0x74736574
+
+#define MB_GPIO_RESET 0x0
+#define MB_GPIO_ENABLED 0x1
+
+#define MB_SELF_JUMP(ins) (((ins) & 0xfc00ffff) == 0xb8000000)
+
+/*
+ * Interrupt controls
+ */
+#define XCLMGMT_MAX_INTR_NUM 32
+#define XCLMGMT_MAX_USER_INTR 16
+#define XCLMGMT_INTR_CTRL_BASE (0x2000UL)
+#define XCLMGMT_INTR_USER_ENABLE (XCLMGMT_INTR_CTRL_BASE + 0x08)
+#define XCLMGMT_INTR_USER_DISABLE (XCLMGMT_INTR_CTRL_BASE + 0x0C)
+#define XCLMGMT_INTR_USER_VECTOR (XCLMGMT_INTR_CTRL_BASE + 0x80)
+#define XCLMGMT_MAILBOX_INTR 11
+
+#endif
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-sysfs.c b/drivers/gpu/drm/xocl/mgmtpf/mgmt-sysfs.c
new file mode 100644
index 000000000000..40d7c855ab14
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-sysfs.c
@@ -0,0 +1,318 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * sysfs for the device attributes.
+ *
+ * Copyright (C) 2016-2019 Xilinx, Inc. All rights reserved.
+ *
+ * Authors:
+ * Lizhi Hou <lizhih@...inx.com>
+ * Umang Parekh <umang.parekh@...inx.com>
+ *
+ */
+
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+#include "mgmt-core.h"
+#include "../version.h"
+
+static ssize_t instance_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", lro->instance);
+}
+static DEVICE_ATTR_RO(instance);
+
+static ssize_t error_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+ ssize_t count = sprintf(buf, "%s\n", lro->core.ebuf);
+
+ lro->core.ebuf[0] = 0;
+ return count;
+}
+static DEVICE_ATTR_RO(error);
+
+static ssize_t userbar_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", lro->core.bar_idx);
+}
+static DEVICE_ATTR_RO(userbar);
+
+static ssize_t flash_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n",
+ lro->core.priv.flash_type ? lro->core.priv.flash_type : "");
+}
+static DEVICE_ATTR_RO(flash_type);
+
+static ssize_t board_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n",
+ lro->core.priv.board_name ? lro->core.priv.board_name : "");
+}
+static DEVICE_ATTR_RO(board_name);
+
+static ssize_t mfg_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", (lro->core.priv.flags & XOCL_DSAFLAG_MFG) != 0);
+}
+static DEVICE_ATTR_RO(mfg);
+
+static ssize_t feature_rom_offset_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%llu\n", lro->core.feature_rom_offset);
+}
+static DEVICE_ATTR_RO(feature_rom_offset);
+
+static ssize_t mgmt_pf_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ // The existence of entry indicates mgmt function.
+ return sprintf(buf, "%s", "");
+}
+static DEVICE_ATTR_RO(mgmt_pf);
+
+static ssize_t version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ u32 major, minor, patch;
+
+ if (sscanf(XRT_DRIVER_VERSION, "%d.%d.%d", &major, &minor, &patch) != 3)
+ return 0;
+ return sprintf(buf, "%d\n", XOCL_DRV_VER_NUM(major, minor, patch));
+}
+static DEVICE_ATTR_RO(version);
+
+static ssize_t slot_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", PCI_SLOT(lro->core.pdev->devfn));
+}
+static DEVICE_ATTR_RO(slot);
+
+static ssize_t link_speed_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned short speed, width;
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ get_pcie_link_info(lro, &width, &speed, false);
+ return sprintf(buf, "%d\n", speed);
+}
+static DEVICE_ATTR_RO(link_speed);
+
+static ssize_t link_width_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned short speed, width;
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ get_pcie_link_info(lro, &width, &speed, false);
+ return sprintf(buf, "%d\n", width);
+}
+static DEVICE_ATTR_RO(link_width);
+
+static ssize_t link_speed_max_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned short speed, width;
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ get_pcie_link_info(lro, &width, &speed, true);
+ return sprintf(buf, "%d\n", speed);
+}
+static DEVICE_ATTR_RO(link_speed_max);
+
+static ssize_t link_width_max_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned short speed, width;
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ get_pcie_link_info(lro, &width, &speed, true);
+ return sprintf(buf, "%d\n", width);
+}
+static DEVICE_ATTR_RO(link_width_max);
+
+static ssize_t mig_calibration_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n",
+ lro->ready ? MGMT_READ_REG32(lro, GENERAL_STATUS_BASE) : 0);
+}
+static DEVICE_ATTR_RO(mig_calibration);
+
+static ssize_t xpr_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", XOCL_DSA_XPR_ON(lro));
+}
+static DEVICE_ATTR_RO(xpr);
+
+static ssize_t ready_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", lro->ready);
+}
+static DEVICE_ATTR_RO(ready);
+
+static ssize_t dev_offline_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+ int val = lro->core.offline ? 1 : 0;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t dev_offline_store(struct device *dev,
+ struct device_attribute *da, const char *buf, size_t count)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+ int ret;
+ u32 offline;
+
+ if (kstrtou32(buf, 10, &offline) == -EINVAL || offline > 1)
+ return -EINVAL;
+
+ device_lock(dev);
+ if (offline) {
+ ret = health_thread_stop(lro);
+ if (ret) {
+ xocl_err(dev, "stop health thread failed");
+ return -EIO;
+ }
+ xocl_subdev_destroy_all(lro);
+ lro->core.offline = true;
+ } else {
+ ret = xocl_subdev_create_all(lro, lro->core.priv.subdev_info,
+ lro->core.priv.subdev_num);
+ if (ret) {
+ xocl_err(dev, "Online subdevices failed");
+ return -EIO;
+ }
+ ret = health_thread_start(lro);
+ if (ret) {
+ xocl_err(dev, "start health thread failed");
+ return -EIO;
+ }
+ lro->core.offline = false;
+ }
+ device_unlock(dev);
+
+ return count;
+}
+
+static DEVICE_ATTR(dev_offline, 0644, dev_offline_show, dev_offline_store);
+
+static ssize_t subdev_online_store(struct device *dev,
+ struct device_attribute *da, const char *buf, size_t count)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+ int ret;
+ char *name = (char *)buf;
+
+ device_lock(dev);
+ ret = xocl_subdev_create_by_name(lro, name);
+ if (ret)
+ xocl_err(dev, "create subdev by name failed");
+ else
+ ret = count;
+ device_unlock(dev);
+
+ return ret;
+}
+
+static DEVICE_ATTR(subdev_online, 0200, NULL, subdev_online_store);
+
+static ssize_t subdev_offline_store(struct device *dev,
+ struct device_attribute *da, const char *buf, size_t count)
+{
+ struct xclmgmt_dev *lro = dev_get_drvdata(dev);
+ int ret;
+ char *name = (char *)buf;
+
+ device_lock(dev);
+ ret = xocl_subdev_destroy_by_name(lro, name);
+ if (ret)
+ xocl_err(dev, "destroy subdev by name failed");
+ else
+ ret = count;
+ device_unlock(dev);
+
+ return ret;
+}
+
+static DEVICE_ATTR(subdev_offline, 0200, NULL, subdev_offline_store);
+
+static struct attribute *mgmt_attrs[] = {
+ &dev_attr_instance.attr,
+ &dev_attr_error.attr,
+ &dev_attr_userbar.attr,
+ &dev_attr_version.attr,
+ &dev_attr_slot.attr,
+ &dev_attr_link_speed.attr,
+ &dev_attr_link_width.attr,
+ &dev_attr_link_speed_max.attr,
+ &dev_attr_link_width_max.attr,
+ &dev_attr_mig_calibration.attr,
+ &dev_attr_xpr.attr,
+ &dev_attr_ready.attr,
+ &dev_attr_mfg.attr,
+ &dev_attr_mgmt_pf.attr,
+ &dev_attr_flash_type.attr,
+ &dev_attr_board_name.attr,
+ &dev_attr_feature_rom_offset.attr,
+ &dev_attr_dev_offline.attr,
+ &dev_attr_subdev_online.attr,
+ &dev_attr_subdev_offline.attr,
+ NULL,
+};
+
+static struct attribute_group mgmt_attr_group = {
+ .attrs = mgmt_attrs,
+};
+
+int mgmt_init_sysfs(struct device *dev)
+{
+ int err;
+
+ err = sysfs_create_group(&dev->kobj, &mgmt_attr_group);
+ if (err)
+ xocl_err(dev, "create mgmt attrs failed: %d", err);
+
+ return err;
+}
+
+void mgmt_fini_sysfs(struct device *dev)
+{
+ sysfs_remove_group(&dev->kobj, &mgmt_attr_group);
+}
diff --git a/drivers/gpu/drm/xocl/mgmtpf/mgmt-utils.c b/drivers/gpu/drm/xocl/mgmtpf/mgmt-utils.c
new file mode 100644
index 000000000000..ed70ca83d748
--- /dev/null
+++ b/drivers/gpu/drm/xocl/mgmtpf/mgmt-utils.c
@@ -0,0 +1,399 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright (C) 2017-2019 Xilinx, Inc. All rights reserved.
+ *
+ * Utility Functions for sysmon, axi firewall and other peripherals.
+ * Author: Umang Parekh
+ *
+ */
+
+#include "mgmt-core.h"
+#include <linux/module.h>
+#include "../xocl_drv.h"
+
+#define XCLMGMT_RESET_MAX_RETRY 10
+
+/**
+ * @returns: NULL if AER apability is not found walking up to the root port
+ * : pci_dev ptr to the port which is AER capable.
+ */
+static struct pci_dev *find_aer_cap(struct pci_dev *bridge)
+{
+ struct pci_dev *prev_bridge = bridge;
+ int cap;
+
+ if (bridge == NULL)
+ return NULL;
+ /*
+ * Walk the hierarchy up to the root port
+ **/
+ do {
+ cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
+ if (cap) {
+ printk(KERN_DEBUG "%s: AER capability found.\n", DRV_NAME);
+ return bridge;
+ }
+
+ prev_bridge = bridge;
+ bridge = bridge->bus->self;
+
+ if (!bridge || prev_bridge == bridge) {
+ printk(KERN_DEBUG "%s: AER capability not found. Ignoring boot command.\n", DRV_NAME);
+ return NULL;
+ }
+
+ } while (pci_pcie_type(bridge) != PCI_EXP_TYPE_ROOT_PORT);
+
+ return NULL;
+}
+
+/*
+ * pcie_(un)mask_surprise_down inspired by myri10ge driver, myri10ge.c
+ */
+static int pcie_mask_surprise_down(struct pci_dev *pdev, u32 *orig_mask)
+{
+ struct pci_dev *bridge = pdev->bus->self;
+ int cap;
+ u32 mask;
+
+ printk(KERN_INFO "%s: pcie_mask_surprise_down\n", DRV_NAME);
+
+ bridge = find_aer_cap(bridge);
+ if (bridge) {
+ cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
+ if (cap) {
+ pci_read_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, orig_mask);
+ mask = *orig_mask;
+ mask |= 0x20;
+ pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, mask);
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+static int pcie_unmask_surprise_down(struct pci_dev *pdev, u32 orig_mask)
+{
+ struct pci_dev *bridge = pdev->bus->self;
+ int cap;
+
+ printk(KERN_DEBUG "%s: pcie_unmask_surprise_down\n", DRV_NAME);
+
+ bridge = find_aer_cap(bridge);
+ if (bridge) {
+ cap = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ERR);
+ if (cap) {
+ pci_write_config_dword(bridge, cap + PCI_ERR_UNCOR_MASK, orig_mask);
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
+/**
+ * Workaround for some DSAs that need axilite bus flushed after reset
+ */
+void platform_axilite_flush(struct xclmgmt_dev *lro)
+{
+ u32 val, i, gpio_val;
+
+ mgmt_info(lro, "Flushing axilite busses.");
+
+ /* The flush sequence works as follows:
+ * Read axilite peripheral up to 4 times
+ * Check if firewall trips and clear it.
+ * Touch all axilite interconnects with clock crossing
+ * in platform which requires reading multiple peripherals
+ * (Feature ROM, MB Reset GPIO, Sysmon)
+ */
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, FEATURE_ROM_BASE);
+ xocl_af_clear(lro);
+ }
+
+ for (i = 0; i < 4; i++) {
+ gpio_val = MGMT_READ_REG32(lro, MB_GPIO);
+ xocl_af_clear(lro);
+ }
+
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, SYSMON_BASE);
+ xocl_af_clear(lro);
+ }
+
+ //Can only read this safely if not in reset
+ if (gpio_val == 1) {
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, MB_IMAGE_SCHE);
+ xocl_af_clear(lro);
+ }
+ }
+
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, XHWICAP_CR);
+ xocl_af_clear(lro);
+ }
+
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, GPIO_NULL_BASE);
+ xocl_af_clear(lro);
+ }
+
+ for (i = 0; i < 4; i++) {
+ val = MGMT_READ_REG32(lro, AXI_GATE_BASE);
+ xocl_af_clear(lro);
+ }
+}
+
+/**
+ * Perform a PCIe secondary bus reset. Note: Use this method over pcie fundamental reset.
+ * This method is known to work better.
+ */
+
+long reset_hot_ioctl(struct xclmgmt_dev *lro)
+{
+ long err = 0;
+ const char *ep_name;
+ struct pci_dev *pdev = lro->pci_dev;
+ struct xocl_board_private *dev_info = &lro->core.priv;
+ int retry = 0;
+
+
+ if (!pdev->bus || !pdev->bus->self) {
+ mgmt_err(lro, "Unable to identify device root port for card %d",
+ lro->instance);
+ err = -ENODEV;
+ goto done;
+ }
+
+ ep_name = pdev->bus->name;
+#if defined(__PPC64__)
+ mgmt_err(lro, "Ignore reset operation for card %d in slot %s:%02x:%1x",
+ lro->instance, ep_name,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+#else
+ mgmt_err(lro, "Trying to reset card %d in slot %s:%02x:%1x",
+ lro->instance, ep_name,
+ PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+
+ /* request XMC/ERT to stop */
+ xocl_mb_stop(lro);
+
+ xocl_icap_reset_axi_gate(lro);
+
+ /*
+ * lock pci config space access from userspace,
+ * save state and issue PCIe secondary bus reset
+ */
+ if (!XOCL_DSA_PCI_RESET_OFF(lro)) {
+ (void) xocl_mailbox_reset(lro, false);
+ xclmgmt_reset_pci(lro);
+ (void) xocl_mailbox_reset(lro, true);
+ } else {
+ mgmt_err(lro, "PCI Hot reset is not supported on this board.");
+ }
+
+ /* Workaround for some DSAs. Flush axilite busses */
+ if (dev_info->flags & XOCL_DSAFLAG_AXILITE_FLUSH)
+ platform_axilite_flush(lro);
+
+ /*
+ * Check firewall status. Status should be 0 (cleared)
+ * Otherwise issue message that a warm reboot is required.
+ */
+ do {
+ msleep(20);
+ } while (retry++ < XCLMGMT_RESET_MAX_RETRY &&
+ xocl_af_check(lro, NULL));
+
+ if (retry >= XCLMGMT_RESET_MAX_RETRY) {
+ mgmt_err(lro, "Board is not able to recover by PCI Hot reset, please warm reboot");
+ return -EIO;
+ }
+
+ //Also freeze and free AXI gate to reset the OCL region.
+ xocl_icap_reset_axi_gate(lro);
+
+ /* Workaround for some DSAs. Flush axilite busses */
+ if (dev_info->flags & XOCL_DSAFLAG_AXILITE_FLUSH)
+ platform_axilite_flush(lro);
+
+ /* restart XMC/ERT */
+ xocl_mb_reset(lro);
+
+#endif
+done:
+ return err;
+}
+
+static int xocl_match_slot_and_save(struct device *dev, void *data)
+{
+ struct pci_dev *pdev;
+ unsigned long slot;
+
+ pdev = to_pci_dev(dev);
+ slot = PCI_SLOT(pdev->devfn);
+
+ if (slot == (unsigned long)data) {
+ pci_cfg_access_lock(pdev);
+ pci_save_state(pdev);
+ }
+
+ return 0;
+}
+
+static void xocl_pci_save_config_all(struct pci_dev *pdev)
+{
+ unsigned long slot = PCI_SLOT(pdev->devfn);
+
+ bus_for_each_dev(&pci_bus_type, NULL, (void *)slot,
+ xocl_match_slot_and_save);
+}
+
+static int xocl_match_slot_and_restore(struct device *dev, void *data)
+{
+ struct pci_dev *pdev;
+ unsigned long slot;
+
+ pdev = to_pci_dev(dev);
+ slot = PCI_SLOT(pdev->devfn);
+
+ if (slot == (unsigned long)data) {
+ pci_restore_state(pdev);
+ pci_cfg_access_unlock(pdev);
+ }
+
+ return 0;
+}
+
+static void xocl_pci_restore_config_all(struct pci_dev *pdev)
+{
+ unsigned long slot = PCI_SLOT(pdev->devfn);
+
+ bus_for_each_dev(&pci_bus_type, NULL, (void *)slot,
+ xocl_match_slot_and_restore);
+}
+/*
+ * Inspired by GenWQE driver, card_base.c
+ */
+int pci_fundamental_reset(struct xclmgmt_dev *lro)
+{
+ int rc;
+ u32 orig_mask;
+ u8 hot;
+ struct pci_dev *pci_dev = lro->pci_dev;
+
+ //freeze and free AXI gate to reset the OCL region before and after the pcie reset.
+ xocl_icap_reset_axi_gate(lro);
+
+ /*
+ * lock pci config space access from userspace,
+ * save state and issue PCIe fundamental reset
+ */
+ mgmt_info(lro, "%s\n", __func__);
+
+ // Save pci config space for botht the pf's
+ xocl_pci_save_config_all(pci_dev);
+
+ rc = pcie_mask_surprise_down(pci_dev, &orig_mask);
+ if (rc)
+ goto done;
+
+#if defined(__PPC64__)
+ /*
+ * On PPC64LE use pcie_warm_reset which will cause the FPGA to
+ * reload from PROM
+ */
+ rc = pci_set_pcie_reset_state(pci_dev, pcie_warm_reset);
+ if (rc)
+ goto done;
+ /* keep PCIe reset asserted for 250ms */
+ msleep(250);
+ rc = pci_set_pcie_reset_state(pci_dev, pcie_deassert_reset);
+ if (rc)
+ goto done;
+ /* Wait for 2s to reload flash and train the link */
+ msleep(2000);
+#else
+ rc = xocl_icap_reset_bitstream(lro);
+ if (rc)
+ goto done;
+
+ /* Now perform secondary bus reset which should reset most of the device */
+ pci_read_config_byte(pci_dev->bus->self, PCI_MIN_GNT, &hot);
+ /* Toggle the PCIe hot reset bit in the root port */
+ pci_write_config_byte(pci_dev->bus->self, PCI_MIN_GNT, hot | 0x40);
+ msleep(500);
+ pci_write_config_byte(pci_dev->bus->self, PCI_MIN_GNT, hot);
+ msleep(500);
+#endif
+done:
+ // restore pci config space for botht the pf's
+ rc = pcie_unmask_surprise_down(pci_dev, orig_mask);
+ xocl_pci_restore_config_all(pci_dev);
+
+ //Also freeze and free AXI gate to reset the OCL region.
+ xocl_icap_reset_axi_gate(lro);
+
+ return rc;
+}
+
+unsigned int compute_unit_busy(struct xclmgmt_dev *lro)
+{
+ int i = 0;
+ unsigned int result = 0;
+ u32 r = MGMT_READ_REG32(lro, AXI_GATE_BASE_RD_BASE);
+
+ /*
+ * r != 0x3 implies that OCL region is isolated and we cannot read
+ * CUs' status
+ */
+ if (r != 0x3)
+ return 0;
+
+ /* ?? Assumed only 16 CUs ? */
+ for (i = 0; i < 16; i++) {
+ r = MGMT_READ_REG32(lro, OCL_CTLR_BASE + i * OCL_CU_CTRL_RANGE);
+ if (r == 0x1)
+ result |= (r << i);
+ }
+ return result;
+}
+
+void xclmgmt_reset_pci(struct xclmgmt_dev *lro)
+{
+ struct pci_dev *pdev = lro->pci_dev;
+ struct pci_bus *bus;
+ int i;
+ u16 pci_cmd;
+ u8 pci_bctl;
+
+ mgmt_info(lro, "Reset PCI");
+
+ /* what if user PF in VM ? */
+ xocl_pci_save_config_all(pdev);
+
+ /* Reset secondary bus. */
+ bus = pdev->bus;
+ pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &pci_bctl);
+ pci_bctl |= PCI_BRIDGE_CTL_BUS_RESET;
+ pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
+
+ msleep(100);
+ pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
+ pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
+
+ for (i = 0; i < 5000; i++) {
+ pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
+ if (pci_cmd != 0xffff)
+ break;
+ msleep(1);
+ }
+
+ mgmt_info(lro, "Resetting for %d ms", i);
+
+ xocl_pci_restore_config_all(pdev);
+}
--
2.17.0
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