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Message-ID: <20230419170427.1108-2-shannon.nelson@amd.com>
Date: Wed, 19 Apr 2023 10:04:14 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <shannon.nelson@....com>, <brett.creeley@....com>,
<davem@...emloft.net>, <netdev@...r.kernel.org>, <kuba@...nel.org>
CC: <drivers@...sando.io>, <leon@...nel.org>, <jiri@...nulli.us>,
<simon.horman@...igine.com>
Subject: [PATCH v11 net-next 01/14] pds_core: initial framework for pds_core PF driver
This is the initial PCI driver framework for the new pds_core device
driver and its family of devices. This does the very basics of
registering for the new PF PCI device 1dd8:100c, setting up debugfs
entries, and registering with devlink.
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
Acked-by: Jakub Kicinski <kuba@...nel.org>
---
.../device_drivers/ethernet/amd/pds_core.rst | 35 ++
.../device_drivers/ethernet/index.rst | 1 +
drivers/net/ethernet/amd/pds_core/Makefile | 8 +
drivers/net/ethernet/amd/pds_core/core.h | 56 ++
drivers/net/ethernet/amd/pds_core/debugfs.c | 31 +
drivers/net/ethernet/amd/pds_core/main.c | 277 +++++++++
include/linux/pds/pds_common.h | 14 +
include/linux/pds/pds_core_if.h | 571 ++++++++++++++++++
8 files changed, 993 insertions(+)
create mode 100644 Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
create mode 100644 drivers/net/ethernet/amd/pds_core/Makefile
create mode 100644 drivers/net/ethernet/amd/pds_core/core.h
create mode 100644 drivers/net/ethernet/amd/pds_core/debugfs.c
create mode 100644 drivers/net/ethernet/amd/pds_core/main.c
create mode 100644 include/linux/pds/pds_common.h
create mode 100644 include/linux/pds/pds_core_if.h
diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
new file mode 100644
index 000000000000..99a70026f1bc
--- /dev/null
+++ b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
@@ -0,0 +1,35 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+========================================================
+Linux Driver for the AMD/Pensando(R) DSC adapter family
+========================================================
+
+Copyright(c) 2023 Advanced Micro Devices, Inc
+
+Identifying the Adapter
+=======================
+
+To find if one or more AMD/Pensando PCI Core devices are installed on the
+host, check for the PCI devices::
+
+ # lspci -d 1dd8:100c
+ b5:00.0 Processing accelerators: Pensando Systems Device 100c
+ b6:00.0 Processing accelerators: Pensando Systems Device 100c
+
+If such devices are listed as above, then the pds_core.ko driver should find
+and configure them for use. There should be log entries in the kernel
+messages such as these::
+
+ $ dmesg | grep pds_core
+ pds_core 0000:b5:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
+ pds_core 0000:b5:00.0: FW: 1.60.0-73
+ pds_core 0000:b6:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
+ pds_core 0000:b6:00.0: FW: 1.60.0-73
+
+Support
+=======
+
+For general Linux networking support, please use the netdev mailing
+list, which is monitored by AMD/Pensando personnel::
+
+ netdev@...r.kernel.org
diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/Documentation/networking/device_drivers/ethernet/index.rst
index 6e9e7012d000..417ca514a4d0 100644
--- a/Documentation/networking/device_drivers/ethernet/index.rst
+++ b/Documentation/networking/device_drivers/ethernet/index.rst
@@ -14,6 +14,7 @@ Contents:
3com/vortex
amazon/ena
altera/altera_tse
+ amd/pds_core
aquantia/atlantic
chelsio/cxgb
cirrus/cs89x0
diff --git a/drivers/net/ethernet/amd/pds_core/Makefile b/drivers/net/ethernet/amd/pds_core/Makefile
new file mode 100644
index 000000000000..de3bf1d1886c
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Advanced Micro Devices, Inc.
+
+obj-$(CONFIG_PDS_CORE) := pds_core.o
+
+pds_core-y := main.o
+
+pds_core-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
new file mode 100644
index 000000000000..34ef837e8cfe
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _PDSC_H_
+#define _PDSC_H_
+
+#include <linux/debugfs.h>
+#include <net/devlink.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+
+#define PDSC_DRV_DESCRIPTION "AMD/Pensando Core Driver"
+
+struct pdsc_dev_bar {
+ void __iomem *vaddr;
+ phys_addr_t bus_addr;
+ unsigned long len;
+ int res_index;
+};
+
+/* No state flags set means we are in a steady running state */
+enum pdsc_state_flags {
+ PDSC_S_FW_DEAD, /* stopped, wait on startup or recovery */
+ PDSC_S_INITING_DRIVER, /* initial startup from probe */
+ PDSC_S_STOPPING_DRIVER, /* driver remove */
+
+ /* leave this as last */
+ PDSC_S_STATE_SIZE
+};
+
+struct pdsc {
+ struct pci_dev *pdev;
+ struct dentry *dentry;
+ struct device *dev;
+ struct pdsc_dev_bar bars[PDS_CORE_BARS_MAX];
+ int hw_index;
+ int uid;
+
+ unsigned long state;
+
+ struct pds_core_dev_info_regs __iomem *info_regs;
+ struct pds_core_dev_cmd_regs __iomem *cmd_regs;
+ struct pds_core_intr __iomem *intr_ctrl;
+ u64 __iomem *intr_status;
+ u64 __iomem *db_pages;
+ dma_addr_t phy_db_pages;
+ u64 __iomem *kern_dbpage;
+};
+
+void pdsc_debugfs_create(void);
+void pdsc_debugfs_destroy(void);
+void pdsc_debugfs_add_dev(struct pdsc *pdsc);
+void pdsc_debugfs_del_dev(struct pdsc *pdsc);
+
+#endif /* _PDSC_H_ */
diff --git a/drivers/net/ethernet/amd/pds_core/debugfs.c b/drivers/net/ethernet/amd/pds_core/debugfs.c
new file mode 100644
index 000000000000..b2f7cb795c20
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/debugfs.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+
+#include "core.h"
+
+static struct dentry *pdsc_dir;
+
+void pdsc_debugfs_create(void)
+{
+ pdsc_dir = debugfs_create_dir(PDS_CORE_DRV_NAME, NULL);
+}
+
+void pdsc_debugfs_destroy(void)
+{
+ debugfs_remove_recursive(pdsc_dir);
+}
+
+void pdsc_debugfs_add_dev(struct pdsc *pdsc)
+{
+ pdsc->dentry = debugfs_create_dir(pci_name(pdsc->pdev), pdsc_dir);
+
+ debugfs_create_ulong("state", 0400, pdsc->dentry, &pdsc->state);
+}
+
+void pdsc_debugfs_del_dev(struct pdsc *pdsc)
+{
+ debugfs_remove_recursive(pdsc->dentry);
+ pdsc->dentry = NULL;
+}
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
new file mode 100644
index 000000000000..c2b12f226959
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -0,0 +1,277 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/pci.h>
+
+#include <linux/pds/pds_common.h>
+
+#include "core.h"
+
+MODULE_DESCRIPTION(PDSC_DRV_DESCRIPTION);
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_LICENSE("GPL");
+
+/* Supported devices */
+static const struct pci_device_id pdsc_id_table[] = {
+ { PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_CORE_PF) },
+ { 0, } /* end of table */
+};
+MODULE_DEVICE_TABLE(pci, pdsc_id_table);
+
+static void pdsc_unmap_bars(struct pdsc *pdsc)
+{
+ struct pdsc_dev_bar *bars = pdsc->bars;
+ unsigned int i;
+
+ for (i = 0; i < PDS_CORE_BARS_MAX; i++) {
+ if (bars[i].vaddr)
+ pci_iounmap(pdsc->pdev, bars[i].vaddr);
+ }
+}
+
+static int pdsc_map_bars(struct pdsc *pdsc)
+{
+ struct pdsc_dev_bar *bar = pdsc->bars;
+ struct pci_dev *pdev = pdsc->pdev;
+ struct device *dev = pdsc->dev;
+ struct pdsc_dev_bar *bars;
+ unsigned int i, j;
+ int num_bars = 0;
+ int err;
+ u32 sig;
+
+ bars = pdsc->bars;
+
+ /* Since the PCI interface in the hardware is configurable,
+ * we need to poke into all the bars to find the set we're
+ * expecting.
+ */
+ for (i = 0, j = 0; i < PDS_CORE_BARS_MAX; i++) {
+ if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
+ continue;
+
+ bars[j].len = pci_resource_len(pdev, i);
+ bars[j].bus_addr = pci_resource_start(pdev, i);
+ bars[j].res_index = i;
+
+ /* only map the whole bar 0 */
+ if (j > 0) {
+ bars[j].vaddr = NULL;
+ } else {
+ bars[j].vaddr = pci_iomap(pdev, i, bars[j].len);
+ if (!bars[j].vaddr) {
+ dev_err(dev, "Cannot map BAR %d, aborting\n", i);
+ return -ENODEV;
+ }
+ }
+
+ j++;
+ }
+ num_bars = j;
+
+ /* BAR0: dev_cmd and interrupts */
+ if (num_bars < 1) {
+ dev_err(dev, "No bars found\n");
+ err = -EFAULT;
+ goto err_out;
+ }
+
+ if (bar->len < PDS_CORE_BAR0_SIZE) {
+ dev_err(dev, "Resource bar size %lu too small\n", bar->len);
+ err = -EFAULT;
+ goto err_out;
+ }
+
+ pdsc->info_regs = bar->vaddr + PDS_CORE_BAR0_DEV_INFO_REGS_OFFSET;
+ pdsc->cmd_regs = bar->vaddr + PDS_CORE_BAR0_DEV_CMD_REGS_OFFSET;
+ pdsc->intr_status = bar->vaddr + PDS_CORE_BAR0_INTR_STATUS_OFFSET;
+ pdsc->intr_ctrl = bar->vaddr + PDS_CORE_BAR0_INTR_CTRL_OFFSET;
+
+ sig = ioread32(&pdsc->info_regs->signature);
+ if (sig != PDS_CORE_DEV_INFO_SIGNATURE) {
+ dev_err(dev, "Incompatible firmware signature %x", sig);
+ err = -EFAULT;
+ goto err_out;
+ }
+
+ /* BAR1: doorbells */
+ bar++;
+ if (num_bars < 2) {
+ dev_err(dev, "Doorbell bar missing\n");
+ err = -EFAULT;
+ goto err_out;
+ }
+
+ pdsc->db_pages = bar->vaddr;
+ pdsc->phy_db_pages = bar->bus_addr;
+
+ return 0;
+
+err_out:
+ pdsc_unmap_bars(pdsc);
+ return err;
+}
+
+static int pdsc_init_vf(struct pdsc *vf)
+{
+ return -1;
+}
+
+static int pdsc_init_pf(struct pdsc *pdsc)
+{
+ struct devlink *dl;
+ int err;
+
+ pcie_print_link_status(pdsc->pdev);
+
+ err = pci_request_regions(pdsc->pdev, PDS_CORE_DRV_NAME);
+ if (err) {
+ dev_err(pdsc->dev, "Cannot request PCI regions: %pe\n",
+ ERR_PTR(err));
+ return err;
+ }
+
+ err = pdsc_map_bars(pdsc);
+ if (err)
+ goto err_out_release_regions;
+
+ dl = priv_to_devlink(pdsc);
+ devl_lock(dl);
+ devl_register(dl);
+ devl_unlock(dl);
+
+ return 0;
+
+err_out_release_regions:
+ pci_release_regions(pdsc->pdev);
+
+ return err;
+}
+
+static const struct devlink_ops pdsc_dl_ops = {
+};
+
+static const struct devlink_ops pdsc_dl_vf_ops = {
+};
+
+static DEFINE_IDA(pdsc_ida);
+
+static int pdsc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct device *dev = &pdev->dev;
+ const struct devlink_ops *ops;
+ struct devlink *dl;
+ struct pdsc *pdsc;
+ bool is_pf;
+ int err;
+
+ is_pf = !pdev->is_virtfn;
+ ops = is_pf ? &pdsc_dl_ops : &pdsc_dl_vf_ops;
+ dl = devlink_alloc(ops, sizeof(struct pdsc), dev);
+ if (!dl)
+ return -ENOMEM;
+ pdsc = devlink_priv(dl);
+
+ pdsc->pdev = pdev;
+ pdsc->dev = &pdev->dev;
+ set_bit(PDSC_S_INITING_DRIVER, &pdsc->state);
+ pci_set_drvdata(pdev, pdsc);
+ pdsc_debugfs_add_dev(pdsc);
+
+ err = ida_alloc(&pdsc_ida, GFP_KERNEL);
+ if (err < 0) {
+ dev_err(pdsc->dev, "%s: id alloc failed: %pe\n",
+ __func__, ERR_PTR(err));
+ goto err_out_free_devlink;
+ }
+ pdsc->uid = err;
+
+ /* Query system for DMA addressing limitation for the device. */
+ err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(PDS_CORE_ADDR_LEN));
+ if (err) {
+ dev_err(dev, "Unable to obtain 64-bit DMA for consistent allocations, aborting: %pe\n",
+ ERR_PTR(err));
+ goto err_out_free_ida;
+ }
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ dev_err(dev, "Cannot enable PCI device: %pe\n", ERR_PTR(err));
+ goto err_out_free_ida;
+ }
+ pci_set_master(pdev);
+
+ if (is_pf)
+ err = pdsc_init_pf(pdsc);
+ else
+ err = pdsc_init_vf(pdsc);
+ if (err) {
+ dev_err(dev, "Cannot init device: %pe\n", ERR_PTR(err));
+ goto err_out_clear_master;
+ }
+
+ clear_bit(PDSC_S_INITING_DRIVER, &pdsc->state);
+ return 0;
+
+err_out_clear_master:
+ pci_clear_master(pdev);
+ pci_disable_device(pdev);
+err_out_free_ida:
+ ida_free(&pdsc_ida, pdsc->uid);
+err_out_free_devlink:
+ pdsc_debugfs_del_dev(pdsc);
+ devlink_free(dl);
+
+ return err;
+}
+
+static void pdsc_remove(struct pci_dev *pdev)
+{
+ struct pdsc *pdsc = pci_get_drvdata(pdev);
+ struct devlink *dl;
+
+ /* Unhook the registrations first to be sure there
+ * are no requests while we're stopping.
+ */
+ dl = priv_to_devlink(pdsc);
+ devl_lock(dl);
+ devl_unregister(dl);
+ devl_unlock(dl);
+
+ pdsc_unmap_bars(pdsc);
+ pci_release_regions(pdev);
+
+ pci_clear_master(pdev);
+ pci_disable_device(pdev);
+
+ ida_free(&pdsc_ida, pdsc->uid);
+ pdsc_debugfs_del_dev(pdsc);
+ devlink_free(dl);
+}
+
+static struct pci_driver pdsc_driver = {
+ .name = PDS_CORE_DRV_NAME,
+ .id_table = pdsc_id_table,
+ .probe = pdsc_probe,
+ .remove = pdsc_remove,
+};
+
+static int __init pdsc_init_module(void)
+{
+ if (strcmp(KBUILD_MODNAME, PDS_CORE_DRV_NAME))
+ return -EINVAL;
+
+ pdsc_debugfs_create();
+ return pci_register_driver(&pdsc_driver);
+}
+
+static void __exit pdsc_cleanup_module(void)
+{
+ pci_unregister_driver(&pdsc_driver);
+ pdsc_debugfs_destroy();
+}
+
+module_init(pdsc_init_module);
+module_exit(pdsc_cleanup_module);
diff --git a/include/linux/pds/pds_common.h b/include/linux/pds/pds_common.h
new file mode 100644
index 000000000000..bd041a5170a6
--- /dev/null
+++ b/include/linux/pds/pds_common.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB) OR BSD-2-Clause */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
+
+#ifndef _PDS_COMMON_H_
+#define _PDS_COMMON_H_
+
+#define PDS_CORE_DRV_NAME "pds_core"
+
+/* the device's internal addressing uses up to 52 bits */
+#define PDS_CORE_ADDR_LEN 52
+#define PDS_CORE_ADDR_MASK (BIT_ULL(PDS_ADDR_LEN) - 1)
+#define PDS_PAGE_SIZE 4096
+
+#endif /* _PDS_COMMON_H_ */
diff --git a/include/linux/pds/pds_core_if.h b/include/linux/pds/pds_core_if.h
new file mode 100644
index 000000000000..e838a2b90440
--- /dev/null
+++ b/include/linux/pds/pds_core_if.h
@@ -0,0 +1,571 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR Linux-OpenIB) OR BSD-2-Clause */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc. */
+
+#ifndef _PDS_CORE_IF_H_
+#define _PDS_CORE_IF_H_
+
+#define PCI_VENDOR_ID_PENSANDO 0x1dd8
+#define PCI_DEVICE_ID_PENSANDO_CORE_PF 0x100c
+#define PCI_DEVICE_ID_VIRTIO_NET_TRANS 0x1000
+#define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF 0x1003
+#define PCI_DEVICE_ID_PENSANDO_VDPA_VF 0x100b
+#define PDS_CORE_BARS_MAX 4
+#define PDS_CORE_PCI_BAR_DBELL 1
+
+/* Bar0 */
+#define PDS_CORE_DEV_INFO_SIGNATURE 0x44455649 /* 'DEVI' */
+#define PDS_CORE_BAR0_SIZE 0x8000
+#define PDS_CORE_BAR0_DEV_INFO_REGS_OFFSET 0x0000
+#define PDS_CORE_BAR0_DEV_CMD_REGS_OFFSET 0x0800
+#define PDS_CORE_BAR0_DEV_CMD_DATA_REGS_OFFSET 0x0c00
+#define PDS_CORE_BAR0_INTR_STATUS_OFFSET 0x1000
+#define PDS_CORE_BAR0_INTR_CTRL_OFFSET 0x2000
+#define PDS_CORE_DEV_CMD_DONE 0x00000001
+
+#define PDS_CORE_DEVCMD_TIMEOUT 5
+
+#define PDS_CORE_CLIENT_ID 0
+#define PDS_CORE_ASIC_TYPE_CAPRI 0
+
+/*
+ * enum pds_core_cmd_opcode - Device commands
+ */
+enum pds_core_cmd_opcode {
+ /* Core init */
+ PDS_CORE_CMD_NOP = 0,
+ PDS_CORE_CMD_IDENTIFY = 1,
+ PDS_CORE_CMD_RESET = 2,
+ PDS_CORE_CMD_INIT = 3,
+
+ PDS_CORE_CMD_FW_DOWNLOAD = 4,
+ PDS_CORE_CMD_FW_CONTROL = 5,
+
+ /* SR/IOV commands */
+ PDS_CORE_CMD_VF_GETATTR = 60,
+ PDS_CORE_CMD_VF_SETATTR = 61,
+ PDS_CORE_CMD_VF_CTRL = 62,
+
+ /* Add commands before this line */
+ PDS_CORE_CMD_MAX,
+ PDS_CORE_CMD_COUNT
+};
+
+/*
+ * enum pds_core_status_code - Device command return codes
+ */
+enum pds_core_status_code {
+ PDS_RC_SUCCESS = 0, /* Success */
+ PDS_RC_EVERSION = 1, /* Incorrect version for request */
+ PDS_RC_EOPCODE = 2, /* Invalid cmd opcode */
+ PDS_RC_EIO = 3, /* I/O error */
+ PDS_RC_EPERM = 4, /* Permission denied */
+ PDS_RC_EQID = 5, /* Bad qid */
+ PDS_RC_EQTYPE = 6, /* Bad qtype */
+ PDS_RC_ENOENT = 7, /* No such element */
+ PDS_RC_EINTR = 8, /* operation interrupted */
+ PDS_RC_EAGAIN = 9, /* Try again */
+ PDS_RC_ENOMEM = 10, /* Out of memory */
+ PDS_RC_EFAULT = 11, /* Bad address */
+ PDS_RC_EBUSY = 12, /* Device or resource busy */
+ PDS_RC_EEXIST = 13, /* object already exists */
+ PDS_RC_EINVAL = 14, /* Invalid argument */
+ PDS_RC_ENOSPC = 15, /* No space left or alloc failure */
+ PDS_RC_ERANGE = 16, /* Parameter out of range */
+ PDS_RC_BAD_ADDR = 17, /* Descriptor contains a bad ptr */
+ PDS_RC_DEV_CMD = 18, /* Device cmd attempted on AdminQ */
+ PDS_RC_ENOSUPP = 19, /* Operation not supported */
+ PDS_RC_ERROR = 29, /* Generic error */
+ PDS_RC_ERDMA = 30, /* Generic RDMA error */
+ PDS_RC_EVFID = 31, /* VF ID does not exist */
+ PDS_RC_BAD_FW = 32, /* FW file is invalid or corrupted */
+ PDS_RC_ECLIENT = 33, /* No such client id */
+};
+
+/**
+ * struct pds_core_drv_identity - Driver identity information
+ * @drv_type: Driver type (enum pds_core_driver_type)
+ * @os_dist: OS distribution, numeric format
+ * @os_dist_str: OS distribution, string format
+ * @kernel_ver: Kernel version, numeric format
+ * @kernel_ver_str: Kernel version, string format
+ * @driver_ver_str: Driver version, string format
+ */
+struct pds_core_drv_identity {
+ __le32 drv_type;
+ __le32 os_dist;
+ char os_dist_str[128];
+ __le32 kernel_ver;
+ char kernel_ver_str[32];
+ char driver_ver_str[32];
+};
+
+#define PDS_DEV_TYPE_MAX 16
+/**
+ * struct pds_core_dev_identity - Device identity information
+ * @version: Version of device identify
+ * @type: Identify type (0 for now)
+ * @state: Device state
+ * @rsvd: Word boundary padding
+ * @nlifs: Number of LIFs provisioned
+ * @nintrs: Number of interrupts provisioned
+ * @ndbpgs_per_lif: Number of doorbell pages per LIF
+ * @intr_coal_mult: Interrupt coalescing multiplication factor
+ * Scale user-supplied interrupt coalescing
+ * value in usecs to device units using:
+ * device units = usecs * mult / div
+ * @intr_coal_div: Interrupt coalescing division factor
+ * Scale user-supplied interrupt coalescing
+ * value in usecs to device units using:
+ * device units = usecs * mult / div
+ * @vif_types: How many of each VIF device type is supported
+ */
+struct pds_core_dev_identity {
+ u8 version;
+ u8 type;
+ u8 state;
+ u8 rsvd;
+ __le32 nlifs;
+ __le32 nintrs;
+ __le32 ndbpgs_per_lif;
+ __le32 intr_coal_mult;
+ __le32 intr_coal_div;
+ __le16 vif_types[PDS_DEV_TYPE_MAX];
+};
+
+#define PDS_CORE_IDENTITY_VERSION_1 1
+
+/**
+ * struct pds_core_dev_identify_cmd - Driver/device identify command
+ * @opcode: Opcode PDS_CORE_CMD_IDENTIFY
+ * @ver: Highest version of identify supported by driver
+ *
+ * Expects to find driver identification info (struct pds_core_drv_identity)
+ * in cmd_regs->data. Driver should keep the devcmd interface locked
+ * while preparing the driver info.
+ */
+struct pds_core_dev_identify_cmd {
+ u8 opcode;
+ u8 ver;
+};
+
+/**
+ * struct pds_core_dev_identify_comp - Device identify command completion
+ * @status: Status of the command (enum pds_core_status_code)
+ * @ver: Version of identify returned by device
+ *
+ * Device identification info (struct pds_core_dev_identity) can be found
+ * in cmd_regs->data. Driver should keep the devcmd interface locked
+ * while reading the results.
+ */
+struct pds_core_dev_identify_comp {
+ u8 status;
+ u8 ver;
+};
+
+/**
+ * struct pds_core_dev_reset_cmd - Device reset command
+ * @opcode: Opcode PDS_CORE_CMD_RESET
+ *
+ * Resets and clears all LIFs, VDevs, and VIFs on the device.
+ */
+struct pds_core_dev_reset_cmd {
+ u8 opcode;
+};
+
+/**
+ * struct pds_core_dev_reset_comp - Reset command completion
+ * @status: Status of the command (enum pds_core_status_code)
+ */
+struct pds_core_dev_reset_comp {
+ u8 status;
+};
+
+/*
+ * struct pds_core_dev_init_data - Pointers and info needed for the Core
+ * initialization PDS_CORE_CMD_INIT command. The in and out structs are
+ * overlays on the pds_core_dev_cmd_regs.data space for passing data down
+ * to the firmware on init, and then returning initialization results.
+ */
+struct pds_core_dev_init_data_in {
+ __le64 adminq_q_base;
+ __le64 adminq_cq_base;
+ __le64 notifyq_cq_base;
+ __le32 flags;
+ __le16 intr_index;
+ u8 adminq_ring_size;
+ u8 notifyq_ring_size;
+};
+
+struct pds_core_dev_init_data_out {
+ __le32 core_hw_index;
+ __le32 adminq_hw_index;
+ __le32 notifyq_hw_index;
+ u8 adminq_hw_type;
+ u8 notifyq_hw_type;
+};
+
+/**
+ * struct pds_core_dev_init_cmd - Core device initialize
+ * @opcode: opcode PDS_CORE_CMD_INIT
+ *
+ * Initializes the core device and sets up the AdminQ and NotifyQ.
+ * Expects to find initialization data (struct pds_core_dev_init_data_in)
+ * in cmd_regs->data. Driver should keep the devcmd interface locked
+ * while preparing the driver info.
+ */
+struct pds_core_dev_init_cmd {
+ u8 opcode;
+};
+
+/**
+ * struct pds_core_dev_init_comp - Core init completion
+ * @status: Status of the command (enum pds_core_status_code)
+ *
+ * Initialization result data (struct pds_core_dev_init_data_in)
+ * is found in cmd_regs->data.
+ */
+struct pds_core_dev_init_comp {
+ u8 status;
+};
+
+/**
+ * struct pds_core_fw_download_cmd - Firmware download command
+ * @opcode: opcode
+ * @rsvd: Word boundary padding
+ * @addr: DMA address of the firmware buffer
+ * @offset: offset of the firmware buffer within the full image
+ * @length: number of valid bytes in the firmware buffer
+ */
+struct pds_core_fw_download_cmd {
+ u8 opcode;
+ u8 rsvd[3];
+ __le32 offset;
+ __le64 addr;
+ __le32 length;
+};
+
+/**
+ * struct pds_core_fw_download_comp - Firmware download completion
+ * @status: Status of the command (enum pds_core_status_code)
+ */
+struct pds_core_fw_download_comp {
+ u8 status;
+};
+
+/**
+ * enum pds_core_fw_control_oper - FW control operations
+ * @PDS_CORE_FW_INSTALL_ASYNC: Install firmware asynchronously
+ * @PDS_CORE_FW_INSTALL_STATUS: Firmware installation status
+ * @PDS_CORE_FW_ACTIVATE_ASYNC: Activate firmware asynchronously
+ * @PDS_CORE_FW_ACTIVATE_STATUS: Firmware activate status
+ * @PDS_CORE_FW_UPDATE_CLEANUP: Cleanup any firmware update leftovers
+ * @PDS_CORE_FW_GET_BOOT: Return current active firmware slot
+ * @PDS_CORE_FW_SET_BOOT: Set active firmware slot for next boot
+ * @PDS_CORE_FW_GET_LIST: Return list of installed firmware images
+ */
+enum pds_core_fw_control_oper {
+ PDS_CORE_FW_INSTALL_ASYNC = 0,
+ PDS_CORE_FW_INSTALL_STATUS = 1,
+ PDS_CORE_FW_ACTIVATE_ASYNC = 2,
+ PDS_CORE_FW_ACTIVATE_STATUS = 3,
+ PDS_CORE_FW_UPDATE_CLEANUP = 4,
+ PDS_CORE_FW_GET_BOOT = 5,
+ PDS_CORE_FW_SET_BOOT = 6,
+ PDS_CORE_FW_GET_LIST = 7,
+};
+
+enum pds_core_fw_slot {
+ PDS_CORE_FW_SLOT_INVALID = 0,
+ PDS_CORE_FW_SLOT_A = 1,
+ PDS_CORE_FW_SLOT_B = 2,
+ PDS_CORE_FW_SLOT_GOLD = 3,
+};
+
+/**
+ * struct pds_core_fw_control_cmd - Firmware control command
+ * @opcode: opcode
+ * @rsvd: Word boundary padding
+ * @oper: firmware control operation (enum pds_core_fw_control_oper)
+ * @slot: slot to operate on (enum pds_core_fw_slot)
+ */
+struct pds_core_fw_control_cmd {
+ u8 opcode;
+ u8 rsvd[3];
+ u8 oper;
+ u8 slot;
+};
+
+/**
+ * struct pds_core_fw_control_comp - Firmware control copletion
+ * @status: Status of the command (enum pds_core_status_code)
+ * @rsvd: Word alignment space
+ * @slot: Slot number (enum pds_core_fw_slot)
+ * @rsvd1: Struct padding
+ * @color: Color bit
+ */
+struct pds_core_fw_control_comp {
+ u8 status;
+ u8 rsvd[3];
+ u8 slot;
+ u8 rsvd1[10];
+ u8 color;
+};
+
+struct pds_core_fw_name_info {
+#define PDS_CORE_FWSLOT_BUFLEN 8
+#define PDS_CORE_FWVERS_BUFLEN 32
+ char slotname[PDS_CORE_FWSLOT_BUFLEN];
+ char fw_version[PDS_CORE_FWVERS_BUFLEN];
+};
+
+struct pds_core_fw_list_info {
+#define PDS_CORE_FWVERS_LIST_LEN 16
+ u8 num_fw_slots;
+ struct pds_core_fw_name_info fw_names[PDS_CORE_FWVERS_LIST_LEN];
+} __packed;
+
+enum pds_core_vf_attr {
+ PDS_CORE_VF_ATTR_SPOOFCHK = 1,
+ PDS_CORE_VF_ATTR_TRUST = 2,
+ PDS_CORE_VF_ATTR_MAC = 3,
+ PDS_CORE_VF_ATTR_LINKSTATE = 4,
+ PDS_CORE_VF_ATTR_VLAN = 5,
+ PDS_CORE_VF_ATTR_RATE = 6,
+ PDS_CORE_VF_ATTR_STATSADDR = 7,
+};
+
+/**
+ * enum pds_core_vf_link_status - Virtual Function link status
+ * @PDS_CORE_VF_LINK_STATUS_AUTO: Use link state of the uplink
+ * @PDS_CORE_VF_LINK_STATUS_UP: Link always up
+ * @PDS_CORE_VF_LINK_STATUS_DOWN: Link always down
+ */
+enum pds_core_vf_link_status {
+ PDS_CORE_VF_LINK_STATUS_AUTO = 0,
+ PDS_CORE_VF_LINK_STATUS_UP = 1,
+ PDS_CORE_VF_LINK_STATUS_DOWN = 2,
+};
+
+/**
+ * struct pds_core_vf_setattr_cmd - Set VF attributes on the NIC
+ * @opcode: Opcode
+ * @attr: Attribute type (enum pds_core_vf_attr)
+ * @vf_index: VF index
+ * @macaddr: mac address
+ * @vlanid: vlan ID
+ * @maxrate: max Tx rate in Mbps
+ * @spoofchk: enable address spoof checking
+ * @trust: enable VF trust
+ * @linkstate: set link up or down
+ * @stats: stats addr struct
+ * @stats.pa: set DMA address for VF stats
+ * @stats.len: length of VF stats space
+ * @pad: force union to specific size
+ */
+struct pds_core_vf_setattr_cmd {
+ u8 opcode;
+ u8 attr;
+ __le16 vf_index;
+ union {
+ u8 macaddr[6];
+ __le16 vlanid;
+ __le32 maxrate;
+ u8 spoofchk;
+ u8 trust;
+ u8 linkstate;
+ struct {
+ __le64 pa;
+ __le32 len;
+ } stats;
+ u8 pad[60];
+ } __packed;
+};
+
+struct pds_core_vf_setattr_comp {
+ u8 status;
+ u8 attr;
+ __le16 vf_index;
+ __le16 comp_index;
+ u8 rsvd[9];
+ u8 color;
+};
+
+/**
+ * struct pds_core_vf_getattr_cmd - Get VF attributes from the NIC
+ * @opcode: Opcode
+ * @attr: Attribute type (enum pds_core_vf_attr)
+ * @vf_index: VF index
+ */
+struct pds_core_vf_getattr_cmd {
+ u8 opcode;
+ u8 attr;
+ __le16 vf_index;
+};
+
+struct pds_core_vf_getattr_comp {
+ u8 status;
+ u8 attr;
+ __le16 vf_index;
+ union {
+ u8 macaddr[6];
+ __le16 vlanid;
+ __le32 maxrate;
+ u8 spoofchk;
+ u8 trust;
+ u8 linkstate;
+ __le64 stats_pa;
+ u8 pad[11];
+ } __packed;
+ u8 color;
+};
+
+enum pds_core_vf_ctrl_opcode {
+ PDS_CORE_VF_CTRL_START_ALL = 0,
+ PDS_CORE_VF_CTRL_START = 1,
+};
+
+/**
+ * struct pds_core_vf_ctrl_cmd - VF control command
+ * @opcode: Opcode for the command
+ * @ctrl_opcode: VF control operation type
+ * @vf_index: VF Index. It is unused if op START_ALL is used.
+ */
+
+struct pds_core_vf_ctrl_cmd {
+ u8 opcode;
+ u8 ctrl_opcode;
+ __le16 vf_index;
+};
+
+/**
+ * struct pds_core_vf_ctrl_comp - VF_CTRL command completion.
+ * @status: Status of the command (enum pds_core_status_code)
+ */
+struct pds_core_vf_ctrl_comp {
+ u8 status;
+};
+
+/*
+ * union pds_core_dev_cmd - Overlay of core device command structures
+ */
+union pds_core_dev_cmd {
+ u8 opcode;
+ u32 words[16];
+
+ struct pds_core_dev_identify_cmd identify;
+ struct pds_core_dev_init_cmd init;
+ struct pds_core_dev_reset_cmd reset;
+ struct pds_core_fw_download_cmd fw_download;
+ struct pds_core_fw_control_cmd fw_control;
+
+ struct pds_core_vf_setattr_cmd vf_setattr;
+ struct pds_core_vf_getattr_cmd vf_getattr;
+ struct pds_core_vf_ctrl_cmd vf_ctrl;
+};
+
+/*
+ * union pds_core_dev_comp - Overlay of core device completion structures
+ */
+union pds_core_dev_comp {
+ u8 status;
+ u8 bytes[16];
+
+ struct pds_core_dev_identify_comp identify;
+ struct pds_core_dev_reset_comp reset;
+ struct pds_core_dev_init_comp init;
+ struct pds_core_fw_download_comp fw_download;
+ struct pds_core_fw_control_comp fw_control;
+
+ struct pds_core_vf_setattr_comp vf_setattr;
+ struct pds_core_vf_getattr_comp vf_getattr;
+ struct pds_core_vf_ctrl_comp vf_ctrl;
+};
+
+/**
+ * struct pds_core_dev_hwstamp_regs - Hardware current timestamp registers
+ * @tick_low: Low 32 bits of hardware timestamp
+ * @tick_high: High 32 bits of hardware timestamp
+ */
+struct pds_core_dev_hwstamp_regs {
+ u32 tick_low;
+ u32 tick_high;
+};
+
+/**
+ * struct pds_core_dev_info_regs - Device info register format (read-only)
+ * @signature: Signature value of 0x44455649 ('DEVI')
+ * @version: Current version of info
+ * @asic_type: Asic type
+ * @asic_rev: Asic revision
+ * @fw_status: Firmware status
+ * bit 0 - 1 = fw running
+ * bit 4-7 - 4 bit generation number, changes on fw restart
+ * @fw_heartbeat: Firmware heartbeat counter
+ * @serial_num: Serial number
+ * @fw_version: Firmware version
+ * @oprom_regs: oprom_regs to store oprom debug enable/disable and bmp
+ * @rsvd_pad1024: Struct padding
+ * @hwstamp: Hardware current timestamp registers
+ * @rsvd_pad2048: Struct padding
+ */
+struct pds_core_dev_info_regs {
+#define PDS_CORE_DEVINFO_FWVERS_BUFLEN 32
+#define PDS_CORE_DEVINFO_SERIAL_BUFLEN 32
+ u32 signature;
+ u8 version;
+ u8 asic_type;
+ u8 asic_rev;
+#define PDS_CORE_FW_STS_F_STOPPED 0x00
+#define PDS_CORE_FW_STS_F_RUNNING 0x01
+#define PDS_CORE_FW_STS_F_GENERATION 0xF0
+ u8 fw_status;
+ __le32 fw_heartbeat;
+ char fw_version[PDS_CORE_DEVINFO_FWVERS_BUFLEN];
+ char serial_num[PDS_CORE_DEVINFO_SERIAL_BUFLEN];
+ u8 oprom_regs[32]; /* reserved */
+ u8 rsvd_pad1024[916];
+ struct pds_core_dev_hwstamp_regs hwstamp; /* on 1k boundary */
+ u8 rsvd_pad2048[1016];
+} __packed;
+
+/**
+ * struct pds_core_dev_cmd_regs - Device command register format (read-write)
+ * @doorbell: Device Cmd Doorbell, write-only
+ * Write a 1 to signal device to process cmd
+ * @done: Command completed indicator, poll for completion
+ * bit 0 == 1 when command is complete
+ * @cmd: Opcode-specific command bytes
+ * @comp: Opcode-specific response bytes
+ * @rsvd: Struct padding
+ * @data: Opcode-specific side-data
+ */
+struct pds_core_dev_cmd_regs {
+ u32 doorbell;
+ u32 done;
+ union pds_core_dev_cmd cmd;
+ union pds_core_dev_comp comp;
+ u8 rsvd[48];
+ u32 data[478];
+} __packed;
+
+/**
+ * struct pds_core_dev_regs - Device register format for bar 0 page 0
+ * @info: Device info registers
+ * @devcmd: Device command registers
+ */
+struct pds_core_dev_regs {
+ struct pds_core_dev_info_regs info;
+ struct pds_core_dev_cmd_regs devcmd;
+} __packed;
+
+#ifndef __CHECKER__
+static_assert(sizeof(struct pds_core_drv_identity) <= 1912);
+static_assert(sizeof(struct pds_core_dev_identity) <= 1912);
+static_assert(sizeof(union pds_core_dev_cmd) == 64);
+static_assert(sizeof(union pds_core_dev_comp) == 16);
+static_assert(sizeof(struct pds_core_dev_info_regs) == 2048);
+static_assert(sizeof(struct pds_core_dev_cmd_regs) == 2048);
+static_assert(sizeof(struct pds_core_dev_regs) == 4096);
+#endif /* __CHECKER__ */
+
+#endif /* _PDS_CORE_IF_H_ */
--
2.17.1
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