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Message-ID:
 <IA1PR12MB90628D276DF71029A98620FB9B402@IA1PR12MB9062.namprd12.prod.outlook.com>
Date: Fri, 18 Oct 2024 17:40:19 +0000
From: "Zhang, Yidong (David)" <yidong.zhang@....com>
To: Xu Yilun <yilun.xu@...ux.intel.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>, "mdf@...nel.org"
	<mdf@...nel.org>, "hao.wu@...el.com" <hao.wu@...el.com>, "yilun.xu@...el.com"
	<yilun.xu@...el.com>, "Hou, Lizhi" <lizhi.hou@....com>, "Saraf, Nishad"
	<nishad.saraf@....com>, "Krishnamurthy, Prapul"
	<Prapul.Krishnamurthy@....com>
Subject: RE: [PATCH V1 2/3] drivers/fpga/amd: Add communication with firmware

[AMD Official Use Only - AMD Internal Distribution Only]

Hi Yilun,

Thanks for reviewing the patches for us. I will fix those with detailed info with next V2 patches.
My cover latter was sent with the other patches, but the second patch failed due to "D M K, Karthik" is not a valid email address, I just changed his name to "DMK" 😊.

I will address your comments with next patches set and send a clean patch.
Thank you so much for taking your time helping us on this.

Thanks,
David

-----Original Message-----
From: Xu Yilun <yilun.xu@...ux.intel.com>
Sent: Friday, October 18, 2024 1:11 AM
To: Zhang, Yidong (David) <yidong.zhang@....com>
Cc: linux-kernel@...r.kernel.org; linux-fpga@...r.kernel.org; mdf@...nel.org; hao.wu@...el.com; yilun.xu@...el.com; Hou, Lizhi <lizhi.hou@....com>; Saraf, Nishad <nishad.saraf@....com>; Krishnamurthy, Prapul <Prapul.Krishnamurthy@....com>
Subject: Re: [PATCH V1 2/3] drivers/fpga/amd: Add communication with firmware

Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.


On Mon, Oct 07, 2024 at 03:01:27PM -0700, David Zhang wrote:
> From: Yidong Zhang <yidong.zhang@....com>
>
> Add queue based communication between host driver and firmware on the
> card. The remote queue (rm) can send/receive messages and providing

Abbrevate 'remote queue' to 'rm', or 'remote' to 'rm'. I see you use rm_queue in the code.

> firmware downloading services.
>
> Co-developed-by: Nishad Saraf <nishads@....com>
> Signed-off-by: Nishad Saraf <nishads@....com>
> Co-developed-by: Prapul Krishnamurthy <prapulk@....com>
> Signed-off-by: Prapul Krishnamurthy <prapulk@....com>
> Signed-off-by: Yidong Zhang <yidong.zhang@....com>
> ---
>  drivers/fpga/amd/Makefile         |   6 +-
>  drivers/fpga/amd/vmgmt-rm-queue.c |  38 +++
> drivers/fpga/amd/vmgmt-rm-queue.h |  15 +
>  drivers/fpga/amd/vmgmt-rm.c       | 543 ++++++++++++++++++++++++++++++
>  drivers/fpga/amd/vmgmt-rm.h       | 222 ++++++++++++
>  drivers/fpga/amd/vmgmt.c          | 305 ++++++++++++++++-
>  drivers/fpga/amd/vmgmt.h          |   7 +-
>  7 files changed, 1130 insertions(+), 6 deletions(-)  create mode
> 100644 drivers/fpga/amd/vmgmt-rm-queue.c  create mode 100644
> drivers/fpga/amd/vmgmt-rm-queue.h  create mode 100644
> drivers/fpga/amd/vmgmt-rm.c  create mode 100644
> drivers/fpga/amd/vmgmt-rm.h
>
> diff --git a/drivers/fpga/amd/Makefile b/drivers/fpga/amd/Makefile
> index 3e4c6dd3b787..97cfff6be204 100644
> --- a/drivers/fpga/amd/Makefile
> +++ b/drivers/fpga/amd/Makefile
> @@ -2,5 +2,7 @@
>
>  obj-$(CONFIG_AMD_VERSAL_MGMT)                        += amd-vmgmt.o
>
> -amd-vmgmt-$(CONFIG_AMD_VERSAL_MGMT)          := vmgmt.o      \
> -                                                vmgmt-comms.o
> +amd-vmgmt-$(CONFIG_AMD_VERSAL_MGMT)          := vmgmt.o              \
> +                                                vmgmt-comms.o        \
> +                                                vmgmt-rm.o           \
> +                                                vmgmt-rm-queue.o
> diff --git a/drivers/fpga/amd/vmgmt-rm-queue.c
> b/drivers/fpga/amd/vmgmt-rm-queue.c
> new file mode 100644
> index 000000000000..fe805373ea32
> --- /dev/null
> +++ b/drivers/fpga/amd/vmgmt-rm-queue.c
> @@ -0,0 +1,38 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for Versal PCIe device
> + *
> + * Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved.
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/completion.h>
> +#include <linux/err.h>
> +#include <linux/firmware.h>
> +#include <linux/idr.h>
> +#include <linux/jiffies.h>
> +#include <linux/list.h>
> +#include <linux/mutex.h>
> +#include <linux/pci.h>
> +#include <linux/semaphore.h>
> +#include <linux/timer.h>
> +#include <linux/uuid.h>
> +#include <linux/workqueue.h>
> +
> +#include "vmgmt.h"
> +#include "vmgmt-rm.h"
> +#include "vmgmt-rm-queue.h"
> +
> +int rm_queue_send_cmd(struct rm_cmd *cmd, unsigned long timeout) {
> +     return 0;
> +}
> +
> +void rm_queue_fini(struct rm_device *rdev) { }
> +
> +int rm_queue_init(struct rm_device *rdev) {
> +     return 0;
> +}
> diff --git a/drivers/fpga/amd/vmgmt-rm-queue.h
> b/drivers/fpga/amd/vmgmt-rm-queue.h
> new file mode 100644
> index 000000000000..6fd0e0026a13
> --- /dev/null
> +++ b/drivers/fpga/amd/vmgmt-rm-queue.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Driver for Versal PCIe device
> + *
> + * Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved.
> + */
> +
> +#ifndef __VMGMT_RM_QUEUE_H
> +#define __VMGMT_RM_QUEUE_H
> +
> +int rm_queue_init(struct rm_device *rdev); void rm_queue_fini(struct
> +rm_device *rdev); int rm_queue_send_cmd(struct rm_cmd *cmd, unsigned
> +long timeout);
> +
> +#endif       /* __VMGMT_RM_QUEUE_H */
> diff --git a/drivers/fpga/amd/vmgmt-rm.c b/drivers/fpga/amd/vmgmt-rm.c
> new file mode 100644 index 000000000000..856d5af52c8d
> --- /dev/null
> +++ b/drivers/fpga/amd/vmgmt-rm.c
> @@ -0,0 +1,543 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for Versal PCIe device
> + *
> + * Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved.
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/completion.h>
> +#include <linux/err.h>
> +#include <linux/firmware.h>
> +#include <linux/idr.h>
> +#include <linux/jiffies.h>
> +#include <linux/list.h>
> +#include <linux/mutex.h>
> +#include <linux/pci.h>
> +#include <linux/semaphore.h>
> +#include <linux/timer.h>
> +#include <linux/uuid.h>
> +#include <linux/workqueue.h>
> +
> +#include "vmgmt.h"
> +#include "vmgmt-rm.h"
> +#include "vmgmt-rm-queue.h"
> +
> +static DEFINE_IDA(rm_cmd_ids);
> +
> +static const struct regmap_config rm_shmem_regmap_config = {
> +     .name = "rm_shmem_config",
> +     .reg_bits = 32,
> +     .reg_stride = 4,
> +     .val_bits = 32,
> +};
> +
> +static const struct regmap_config rm_io_regmap_config = {
> +     .name = "rm_io_config",
> +     .reg_bits = 32,
> +     .reg_stride = 4,
> +     .val_bits = 32,
> +};
> +
> +static void rm_uninstall_health_monitor(struct rm_device *rdev);
> +
> +static inline struct rm_device *to_rdev_health_monitor(struct
> +work_struct *w) {
> +     return container_of(w, struct rm_device, health_monitor); }
> +
> +static inline struct rm_device *to_rdev_health_timer(struct
> +timer_list *t) {
> +     return container_of(t, struct rm_device, health_timer); }
> +
> +static inline int rm_shmem_read(struct rm_device *rdev, u32 offset,
> +u32 *value) {
> +     return regmap_read(rdev->shmem_regmap, offset, value); }
> +
> +static inline int rm_shmem_bulk_read(struct rm_device *rdev, u32 offset,
> +                                  u32 *value, u32 size) {
> +     return regmap_bulk_read(rdev->shmem_regmap, offset, value,
> +                             DIV_ROUND_UP(size, 4)); }
> +
> +static inline int rm_shmem_bulk_write(struct rm_device *rdev, u32 offset,
> +                                   u32 *value, u32 size) {
> +     return regmap_bulk_write(rdev->shmem_regmap, offset, value,
> +                             DIV_ROUND_UP(size, 4)); }
> +
> +void rm_queue_destory_cmd(struct rm_cmd *cmd) {
> +     ida_free(&rm_cmd_ids, cmd->sq_msg.hdr.id);
> +     kfree(cmd);
> +}
> +
> +int rm_queue_copy_response(struct rm_cmd *cmd, void *buffer, ssize_t
> +len) {
> +     struct rm_cmd_cq_log_page *result = &cmd->cq_msg.data.page;
> +     u64 off = cmd->sq_msg.data.page.address;
> +
> +     if (!result->len || len < result->len) {
> +             vmgmt_err(cmd->rdev->vdev, "Invalid response or buffer size");
> +             return -EINVAL;
> +     }
> +
> +     return rm_shmem_bulk_read(cmd->rdev, off, (u32 *)buffer,
> +result->len); }
> +
> +static void rm_queue_payload_fini(struct rm_cmd *cmd) {
> +     up(&cmd->rdev->cq.data_lock);
> +}
> +
> +static int rm_queue_payload_init(struct rm_cmd *cmd,
> +                              enum rm_cmd_log_page_type type) {
> +     struct rm_device *rdev = cmd->rdev;
> +     int ret;
> +
> +     ret = down_interruptible(&rdev->cq.data_lock);
> +     if (ret)
> +             return ret;
> +
> +     cmd->sq_msg.data.page.address = rdev->cq.data_offset;
> +     cmd->sq_msg.data.page.size = rdev->cq.data_size;
> +     cmd->sq_msg.data.page.reserved1 = 0;
> +     cmd->sq_msg.data.page.type = FIELD_PREP(RM_CMD_LOG_PAGE_TYPE_MASK,
> +                                             type);
> +     return 0;
> +}
> +
> +void rm_queue_data_fini(struct rm_cmd *cmd) {
> +     up(&cmd->rdev->sq.data_lock);
> +}
> +
> +int rm_queue_data_init(struct rm_cmd *cmd, const char *buffer,
> +ssize_t size) {
> +     struct rm_device *rdev = cmd->rdev;
> +     int ret;
> +
> +     if (!size || size > rdev->sq.data_size) {
> +             vmgmt_err(rdev->vdev, "Unsupported file size");
> +             return -ENOMEM;
> +     }
> +
> +     ret = down_interruptible(&rdev->sq.data_lock);
> +     if (ret)
> +             return ret;
> +
> +     ret = rm_shmem_bulk_write(cmd->rdev, rdev->sq.data_offset,
> +                               (u32 *)buffer, size);
> +     if (ret) {
> +             vmgmt_err(rdev->vdev, "Failed to copy binary to SQ buffer");
> +             up(&cmd->rdev->sq.data_lock);
> +             return ret;
> +     }
> +
> +     cmd->sq_msg.data.bin.address = rdev->sq.data_offset;
> +     cmd->sq_msg.data.bin.size = size;
> +     return 0;
> +}
> +
> +int rm_queue_create_cmd(struct rm_device *rdev, enum rm_queue_opcode opcode,
> +                     struct rm_cmd **cmd_ptr) {
> +     struct rm_cmd *cmd = NULL;
> +     int ret, id;
> +     u16 size;
> +
> +     if (rdev->firewall_tripped)
> +             return -ENODEV;
> +
> +     cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
> +     if (!cmd)
> +             return -ENOMEM;
> +     cmd->rdev = rdev;
> +
> +     switch (opcode) {
> +     case RM_QUEUE_OP_LOAD_XCLBIN:
> +             fallthrough;
> +     case RM_QUEUE_OP_LOAD_FW:
> +             fallthrough;
> +     case RM_QUEUE_OP_LOAD_APU_FW:
> +             size = sizeof(struct rm_cmd_sq_bin);
> +             break;
> +     case RM_QUEUE_OP_GET_LOG_PAGE:
> +             size = sizeof(struct rm_cmd_sq_log_page);
> +             break;
> +     case RM_QUEUE_OP_IDENTIFY:
> +             size = 0;
> +             break;
> +     case RM_QUEUE_OP_VMR_CONTROL:
> +             size = sizeof(struct rm_cmd_sq_ctrl);
> +             break;
> +     default:
> +             vmgmt_err(rdev->vdev, "Invalid cmd opcode %d", opcode);
> +             ret = -EINVAL;
> +             goto error;
> +     };
> +
> +     cmd->opcode = opcode;
> +     cmd->sq_msg.hdr.opcode = FIELD_PREP(RM_CMD_SQ_HDR_OPS_MSK, opcode);
> +     cmd->sq_msg.hdr.msg_size = FIELD_PREP(RM_CMD_SQ_HDR_SIZE_MSK,
> + size);
> +
> +     id = ida_alloc_range(&rm_cmd_ids, RM_CMD_ID_MIN, RM_CMD_ID_MAX, GFP_KERNEL);
> +     if (id < 0) {
> +             vmgmt_err(rdev->vdev, "Failed to alloc cmd ID: %d", id);
> +             ret = id;
> +             goto error;
> +     }
> +     cmd->sq_msg.hdr.id = id;
> +
> +     init_completion(&cmd->executed);
> +
> +     *cmd_ptr = cmd;
> +     return 0;
> +error:
> +     kfree(cmd);
> +     return ret;
> +}
> +
> +static int rm_queue_verify(struct rm_device *rdev) {
> +     struct vmgmt_device *vdev = rdev->vdev;
> +     struct rm_cmd_cq_identify *result;
> +     struct rm_cmd *cmd;
> +     u32 major, minor;
> +     int ret;
> +
> +     ret = rm_queue_create_cmd(rdev, RM_QUEUE_OP_IDENTIFY, &cmd);
> +     if (ret)
> +             return ret;
> +
> +     ret = rm_queue_send_cmd(cmd, RM_CMD_WAIT_CONFIG_TIMEOUT);
> +     if (ret)
> +             goto error;
> +
> +     result = &cmd->cq_msg.data.identify;
> +     major = result->major;
> +     minor = result->minor;
> +     vmgmt_dbg(vdev, "VMR version %d.%d", major, minor);
> +     if (!major) {
> +             vmgmt_err(vdev, "VMR version is unsupported");
> +             ret = -EOPNOTSUPP;
> +     }
> +
> +error:
> +     rm_queue_destory_cmd(cmd);
> +     return ret;
> +}
> +
> +static int rm_check_apu_status(struct rm_device *rdev, bool *status)
> +{
> +     struct rm_cmd_cq_control *result;
> +     struct rm_cmd *cmd;
> +     int ret;
> +
> +     ret = rm_queue_create_cmd(rdev, RM_QUEUE_OP_VMR_CONTROL, &cmd);
> +     if (ret)
> +             return ret;
> +
> +     ret = rm_queue_send_cmd(cmd, RM_CMD_WAIT_CONFIG_TIMEOUT);
> +     if (ret)
> +             goto error;
> +
> +     result = &cmd->cq_msg.data.ctrl;
> +     *status = FIELD_GET(RM_CMD_VMR_CONTROL_PS_MASK, result->status);
> +
> +     rm_queue_destory_cmd(cmd);
> +     return 0;
> +
> +error:
> +     rm_queue_destory_cmd(cmd);
> +     return ret;
> +}
> +
> +static int rm_download_apu_fw(struct rm_device *rdev, char *data,
> +ssize_t size) {
> +     struct rm_cmd *cmd;
> +     int ret;
> +
> +     ret = rm_queue_create_cmd(rdev, RM_QUEUE_OP_LOAD_APU_FW, &cmd);
> +     if (ret)
> +             return ret;
> +
> +     ret = rm_queue_data_init(cmd, data, size);
> +     if (ret)
> +             goto done;
> +
> +     ret = rm_queue_send_cmd(cmd, RM_CMD_WAIT_DOWNLOAD_TIMEOUT);
> +
> +done:
> +     rm_queue_destory_cmd(cmd);
> +     return ret;
> +}
> +
> +int rm_boot_apu(struct rm_device *rdev) {
> +     char *bin = "xilinx/xrt-versal-apu.xsabin";

So apu fw never changes, is it?

> +     const struct firmware *fw = NULL;
> +     bool status;
> +     int ret;
> +
> +     ret = rm_check_apu_status(rdev, &status);
> +     if (ret) {
> +             vmgmt_err(rdev->vdev, "Failed to get APU status");
> +             return ret;
> +     }
> +
> +     if (status) {
> +             vmgmt_dbg(rdev->vdev, "APU online. Skipping APU FW download");
> +             return 0;
> +     }
> +
> +     ret = request_firmware(&fw, bin, &rdev->vdev->pdev->dev);
> +     if (ret) {
> +             vmgmt_warn(rdev->vdev, "Request APU FW %s failed %d", bin, ret);
> +             return ret;
> +     }
> +
> +     vmgmt_dbg(rdev->vdev, "Starting... APU FW download");
> +     ret = rm_download_apu_fw(rdev, (char *)fw->data, fw->size);
> +     vmgmt_dbg(rdev->vdev, "Finished... APU FW download %d", ret);
> +
> +     if (ret)
> +             vmgmt_err(rdev->vdev, "Failed to download APU FW,
> + ret:%d", ret);
> +
> +     release_firmware(fw);
> +
> +     return ret;
> +}
> +
> +static void rm_check_health(struct work_struct *w) {
> +     struct rm_device *rdev = to_rdev_health_monitor(w);
> +     ssize_t len = PAGE_SIZE;
> +     char *buffer = NULL;
> +     struct rm_cmd *cmd;
> +     int ret;
> +
> +     buffer = vzalloc(len);
> +     if (!buffer)
> +             return;
> +
> +     ret = rm_queue_create_cmd(rdev, RM_QUEUE_OP_GET_LOG_PAGE, &cmd);
> +     if (ret)
> +             return;

Memory Leak!

> +
> +     ret = rm_queue_payload_init(cmd, RM_CMD_LOG_PAGE_AXI_TRIP_STATUS);
> +     if (ret)
> +             goto error;
> +
> +     ret = rm_queue_send_cmd(cmd, RM_CMD_WAIT_CONFIG_TIMEOUT);
> +     if (ret == -ETIME || ret == -EINVAL)
> +             goto payload_fini;
> +
> +     if (cmd->cq_msg.data.page.len) {

If no data, the heath is good?

> +             ret = rm_queue_copy_response(cmd, buffer, len);
> +             if (ret)
> +                     goto payload_fini;
> +
> +             vmgmt_err(rdev->vdev, "%s", buffer);

Any concern reading out of bound.

If the buffer is only used in this block, put its allocation/free here.

> +             rdev->firewall_tripped = 1;
> +     }
> +
> +     vfree(buffer);
> +
> +     rm_queue_payload_fini(cmd);
> +     rm_queue_destory_cmd(cmd);
> +
> +     return;
> +
> +payload_fini:
> +     rm_queue_payload_fini(cmd);
> +error:
> +     rm_queue_destory_cmd(cmd);
> +     vfree(buffer);
> +}
> +
> +static void rm_sched_health_check(struct timer_list *t) {
> +     struct rm_device *rdev = to_rdev_health_timer(t);
> +
> +     if (rdev->firewall_tripped) {
> +             vmgmt_err(rdev->vdev, "Firewall tripped, health check paused. Please reset card");
> +             return;
> +     }
> +     /* Schedule a work in the general workqueue */
> +     schedule_work(&rdev->health_monitor);
> +     /* Periodic timer */
> +     mod_timer(&rdev->health_timer, jiffies + RM_HEALTH_CHECK_TIMER);

Again, is it necessary we endless poll. Coundn't we check on cmd create?

> +}
> +
> +static void rm_uninstall_health_monitor(struct rm_device *rdev) {
> +     del_timer_sync(&rdev->health_timer);
> +     cancel_work_sync(&rdev->health_monitor);
> +}
> +
> +static void rm_install_health_monitor(struct rm_device *rdev) {
> +     INIT_WORK(&rdev->health_monitor, &rm_check_health);
> +     timer_setup(&rdev->health_timer, &rm_sched_health_check, 0);
> +     mod_timer(&rdev->health_timer, jiffies + RM_HEALTH_CHECK_TIMER);
> +}
> +
> +void vmgmt_rm_fini(struct rm_device *rdev) {
> +     rm_uninstall_health_monitor(rdev);
> +     rm_queue_fini(rdev);
> +}
> +
> +struct rm_device *vmgmt_rm_init(struct vmgmt_device *vdev) {
> +     struct rm_header *header;
> +     struct rm_device *rdev;
> +     u32 status;
> +     int ret;
> +
> +     rdev = devm_kzalloc(&vdev->pdev->dev, sizeof(*rdev), GFP_KERNEL);
> +     if (!rdev)
> +             return ERR_PTR(-ENOMEM);
> +
> +     rdev->vdev = vdev;
> +     header = &rdev->rm_metadata;
> +
> +     rdev->shmem_regmap = devm_regmap_init_mmio(&vdev->pdev->dev,
> +                                                vdev->tbl + RM_PCI_SHMEM_BAR_OFF,
> +                                                &rm_shmem_regmap_config);
> +     if (IS_ERR(rdev->shmem_regmap)) {
> +             vmgmt_err(vdev, "Failed to init RM shared memory regmap");
> +             return ERR_CAST(rdev->shmem_regmap);
> +     }
> +
> +     ret = rm_shmem_bulk_read(rdev, RM_HDR_OFF, (u32 *)header,
> +                              sizeof(*header));
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to read RM shared mem, ret %d", ret);
> +             ret = -ENODEV;
> +             goto err;
> +     }
> +
> +     if (header->magic != RM_HDR_MAGIC_NUM) {
> +             vmgmt_err(vdev, "Invalid RM header 0x%x", header->magic);
> +             ret = -ENODEV;
> +             goto err;
> +     }
> +
> +     ret = rm_shmem_read(rdev, header->status_off, &status);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to read RM shared mem, ret %d", ret);
> +             ret = -ENODEV;
> +             goto err;
> +     }
> +
> +     if (!status) {
> +             vmgmt_err(vdev, "RM status %d is not ready", status);
> +             ret = -ENODEV;
> +             goto err;
> +     }
> +
> +     rdev->queue_buffer_size = header->data_end - header->data_start + 1;
> +     rdev->queue_buffer_start = header->data_start;
> +     rdev->queue_base = header->queue_base;
> +
> +     rdev->io_regmap = devm_regmap_init_mmio(&vdev->pdev->dev,
> +                                             vdev->tbl + RM_PCI_IO_BAR_OFF,
> +                                             &rm_io_regmap_config);
> +     if (IS_ERR(rdev->io_regmap)) {
> +             vmgmt_err(vdev, "Failed to init RM IO regmap");
> +             ret = PTR_ERR(rdev->io_regmap);
> +             goto err;
> +     }
> +
> +     ret = rm_queue_init(rdev);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to init cmd queue, ret %d", ret);
> +             ret = -ENODEV;
> +             goto err;
> +     }
> +
> +     ret = rm_queue_verify(rdev);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to verify cmd queue, ret %d", ret);
> +             ret = -ENODEV;
> +             goto queue_fini;
> +     }
> +
> +     ret = rm_boot_apu(rdev);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to bringup APU, ret %d", ret);
> +             ret = -ENODEV;
> +             goto queue_fini;
> +     }
> +
> +     rm_install_health_monitor(rdev);
> +
> +     return rdev;
> +queue_fini:
> +     rm_queue_fini(rdev);
> +err:
> +     return ERR_PTR(ret);
> +}
> +
> +int vmgmt_rm_get_fw_id(struct rm_device *rdev, uuid_t *uuid) {
> +     char str[UUID_STRING_LEN];
> +     ssize_t len = PAGE_SIZE;
> +     char *buffer = NULL;
> +     struct rm_cmd *cmd;
> +     u8 i, j;
> +     int ret;
> +
> +     buffer = vmalloc(len);
> +     if (!buffer)
> +             return -ENOMEM;
> +
> +     memset(buffer, 0, len);

vzalloc()?

> +
> +     ret = rm_queue_create_cmd(rdev, RM_QUEUE_OP_GET_LOG_PAGE, &cmd);
> +     if (ret)
> +             return ret;
> +
> +     ret = rm_queue_payload_init(cmd, RM_CMD_LOG_PAGE_FW_ID);
> +     if (ret)
> +             goto error;
> +
> +     ret = rm_queue_send_cmd(cmd, RM_CMD_WAIT_CONFIG_TIMEOUT);
> +     if (ret)
> +             goto payload;
> +
> +     ret = rm_queue_copy_response(cmd, buffer, len);
> +     if (ret)
> +             goto payload;
> +
> +     /* parse uuid into a valid uuid string format */
> +     for (i  = 0, j = 0; i < strlen(buffer); i++) {
> +             str[j++] = buffer[i];
> +             if (j == 8 || j == 13 || j == 18 || j == 23)
> +                     str[j++] = '-';
> +     }
> +
> +     uuid_parse(str, uuid);
> +     vmgmt_dbg(rdev->vdev, "Interface uuid %pU", uuid);
> +
> +     vfree(buffer);
> +
> +     rm_queue_payload_fini(cmd);
> +     rm_queue_destory_cmd(cmd);
> +
> +     return 0;
> +
> +payload:
> +     rm_queue_payload_fini(cmd);
> +error:
> +     rm_queue_destory_cmd(cmd);
> +     vfree(buffer);
> +     return ret;
> +}
> diff --git a/drivers/fpga/amd/vmgmt-rm.h b/drivers/fpga/amd/vmgmt-rm.h
> new file mode 100644 index 000000000000..a74f93cefbe8
> --- /dev/null
> +++ b/drivers/fpga/amd/vmgmt-rm.h
> @@ -0,0 +1,222 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Driver for Versal PCIe device
> + *
> + * Copyright (C) 2024 Advanced Micro Devices, Inc. All rights reserved.
> + */
> +
> +#ifndef __VMGMT_RM_H
> +#define __VMGMT_RM_H
> +
> +#define RM_HDR_OFF                   0x0
> +#define RM_HDR_MAGIC_NUM             0x564D5230
> +#define RM_QUEUE_HDR_MAGIC_NUM               0x5847513F
> +#define RM_PCI_IO_BAR_OFF            0x2010000
> +#define RM_PCI_IO_SIZE                       0x1000
> +#define RM_PCI_SHMEM_BAR_OFF         0x8000000
> +#define RM_PCI_SHMEM_SIZE            0x8000000 /* 128 MB */
> +#define RM_PCI_SHMEM_HDR_SIZE                0x28
> +
> +#define RM_QUEUE_HDR_MAGIC_NUM_OFF   0x0
> +#define RM_IO_SQ_PIDX_OFF            0x0
> +#define RM_IO_CQ_PIDX_OFF            0x100
> +
> +#define RM_CMD_ID_MIN                        1
> +#define RM_CMD_ID_MAX                        (BIT(17) - 1)
> +#define RM_CMD_SQ_HDR_OPS_MSK                GENMASK(15, 0)
> +#define RM_CMD_SQ_HDR_SIZE_MSK               GENMASK(14, 0)
> +#define RM_CMD_SQ_SLOT_SIZE          512
> +#define RM_CMD_CQ_SLOT_SIZE          16
> +#define RM_CMD_CQ_BUFFER_SIZE                (1024 * 1024)
> +#define RM_CMD_CQ_BUFFER_OFFSET              0x0
> +#define RM_CMD_LOG_PAGE_TYPE_MASK    GENMASK(15, 0)
> +#define RM_CMD_VMR_CONTROL_MSK               GENMASK(10, 8)
> +#define RM_CMD_VMR_CONTROL_PS_MASK   BIT(9)
> +
> +#define RM_CMD_WAIT_CONFIG_TIMEOUT   msecs_to_jiffies(10 * 1000)
> +#define RM_CMD_WAIT_DOWNLOAD_TIMEOUT msecs_to_jiffies(300 * 1000)
> +
> +#define RM_COMPLETION_TIMER          (HZ / 10)
> +#define RM_HEALTH_CHECK_TIMER                (HZ)
> +
> +#define RM_INVALID_SLOT                      0
> +
> +enum rm_queue_opcode {
> +     RM_QUEUE_OP_LOAD_XCLBIN         = 0x0,
> +     RM_QUEUE_OP_GET_LOG_PAGE        = 0x8,
> +     RM_QUEUE_OP_LOAD_FW             = 0xA,
> +     RM_QUEUE_OP_LOAD_APU_FW         = 0xD,
> +     RM_QUEUE_OP_VMR_CONTROL         = 0xE,
> +     RM_QUEUE_OP_IDENTIFY            = 0x202,
> +};
> +
> +struct rm_cmd_sq_hdr {
> +     u16 opcode;
> +     u16 msg_size;
> +     u16 id;
> +     u16 reserved;
> +} __packed;
> +
> +struct rm_cmd_cq_hdr {
> +     u16 id;
> +     u16 reserved;
> +} __packed;
> +
> +struct rm_cmd_sq_bin {
> +     u64                     address;
> +     u32                     size;
> +     u32                     reserved1;
> +     u32                     reserved2;
> +     u32                     reserved3;
> +     u64                     reserved4;
> +} __packed;
> +
> +struct rm_cmd_sq_log_page {
> +     u64                     address;
> +     u32                     size;
> +     u32                     reserved1;
> +     u32                     type;
> +     u32                     reserved2;
> +} __packed;
> +
> +struct rm_cmd_sq_ctrl {
> +     u32                     status;
> +} __packed;
> +
> +struct rm_cmd_sq_data {
> +     union {
> +             struct rm_cmd_sq_log_page       page;
> +             struct rm_cmd_sq_bin            bin;
> +             struct rm_cmd_sq_ctrl           ctrl;
> +     };
> +} __packed;
> +
> +struct rm_cmd_cq_identify {
> +     u16                     major;
> +     u16                     minor;
> +     u32                     reserved;
> +} __packed;
> +
> +struct rm_cmd_cq_log_page {
> +     u32                     len;
> +     u32                     reserved;
> +} __packed;
> +
> +struct rm_cmd_cq_control {
> +     u16                     status;
> +     u16                     reserved1;
> +     u32                     reserved2;
> +} __packed;
> +
> +struct rm_cmd_cq_data {
> +     union {
> +             struct rm_cmd_cq_identify       identify;
> +             struct rm_cmd_cq_log_page       page;
> +             struct rm_cmd_cq_control        ctrl;
> +             u32                             reserved[2];
> +     };
> +     u32                     rcode;
> +} __packed;
> +
> +struct rm_cmd_sq_msg {
> +     struct rm_cmd_sq_hdr    hdr;
> +     struct rm_cmd_sq_data   data;
> +} __packed;
> +
> +struct rm_cmd_cq_msg {
> +     struct rm_cmd_cq_hdr    hdr;
> +     struct rm_cmd_cq_data   data;
> +} __packed;
> +
> +struct rm_cmd {
> +     struct rm_device        *rdev;
> +     struct list_head        list;
> +     struct completion       executed;
> +     struct rm_cmd_sq_msg    sq_msg;
> +     struct rm_cmd_cq_msg    cq_msg;
> +     enum rm_queue_opcode    opcode;
> +     void                    *buffer;
> +     ssize_t                 size;
> +};
> +
> +enum rm_queue_type {
> +     RM_QUEUE_SQ,
> +     RM_QUEUE_CQ
> +};
> +
> +enum rm_cmd_log_page_type {
> +     RM_CMD_LOG_PAGE_AXI_TRIP_STATUS = 0x0,
> +     RM_CMD_LOG_PAGE_FW_ID           = 0xA,
> +};
> +
> +struct rm_queue {
> +     enum rm_queue_type      type;
> +     u32                     pidx;
> +     u32                     cidx;
> +     u32                     offset;
> +     u32                     data_offset;
> +     u32                     data_size;
> +     struct semaphore        data_lock;
> +};
> +
> +struct rm_queue_header {
> +     u32                     magic;
> +     u32                     version;
> +     u32                     size;
> +     u32                     sq_off;
> +     u32                     sq_slot_size;
> +     u32                     cq_off;
> +     u32                     sq_cidx;
> +     u32                     cq_cidx;
> +};
> +
> +struct rm_header {
> +     u32                     magic;
> +     u32                     queue_base;
> +     u32                     queue_size;
> +     u32                     status_off;
> +     u32                     status_len;
> +     u32                     log_index;
> +     u32                     log_off;
> +     u32                     log_size;
> +     u32                     data_start;
> +     u32                     data_end;
> +};
> +
> +struct rm_device {
> +     struct vmgmt_device     *vdev;
> +     struct regmap           *shmem_regmap;
> +     struct regmap           *io_regmap;
> +
> +     struct rm_header        rm_metadata;
> +     u32                     queue_buffer_start;
> +     u32                     queue_buffer_size;
> +     u32                     queue_base;
> +
> +     /* Lock to queue access */
> +     struct mutex            queue;
> +     struct rm_queue         sq;
> +     struct rm_queue         cq;
> +     u32                     queue_size;
> +
> +     struct timer_list       msg_timer;
> +     struct work_struct      msg_monitor;
> +     struct timer_list       health_timer;
> +     struct work_struct      health_monitor;
> +     struct list_head        submitted_cmds;
> +
> +     int                     firewall_tripped;
> +};
> +
> +int rm_queue_create_cmd(struct rm_device *rdev, enum rm_queue_opcode opcode,
> +                     struct rm_cmd **cmd_ptr); void
> +rm_queue_destory_cmd(struct rm_cmd *cmd);
> +
> +int rm_queue_data_init(struct rm_cmd *cmd, const char *buffer,
> +ssize_t size); void rm_queue_data_fini(struct rm_cmd *cmd);
> +
> +int rm_queue_copy_response(struct rm_cmd *cmd, void *buffer, ssize_t
> +len);
> +
> +int rm_boot_apu(struct rm_device *rdev);
> +
> +#endif       /* __VMGMT_RM_H */
> diff --git a/drivers/fpga/amd/vmgmt.c b/drivers/fpga/amd/vmgmt.c index
> b72eff9e8bc0..198213a13c7d 100644
> --- a/drivers/fpga/amd/vmgmt.c
> +++ b/drivers/fpga/amd/vmgmt.c
> @@ -21,6 +21,8 @@
>
>  #include "vmgmt.h"
>  #include "vmgmt-comms.h"
> +#include "vmgmt-rm.h"
> +#include "vmgmt-rm-queue.h"
>
>  #define DRV_NAME                     "amd-vmgmt"
>  #define CLASS_NAME                   DRV_NAME
> @@ -43,6 +45,61 @@ static inline struct vmgmt_device *vmgmt_inode_to_vdev(struct inode *inode)
>       return (struct vmgmt_device *)container_of(inode->i_cdev, struct
> vmgmt_device, cdev);  }
>
> +static int vmgmt_fpga_write_init(struct fpga_manager *mgr,
> +                              struct fpga_image_info *info, const char *buf,
> +                              size_t count) {
> +     struct fpga_device *fdev = mgr->priv;
> +     struct fw_tnx *tnx = &fdev->fw;
> +     int ret;
> +
> +     ret = rm_queue_create_cmd(fdev->vdev->rdev, tnx->opcode, &tnx->cmd);
> +     if (ret) {
> +             fdev->state = FPGA_MGR_STATE_WRITE_INIT_ERR;
> +             return ret;
> +     }
> +
> +     fdev->state = FPGA_MGR_STATE_WRITE_INIT;
> +     return ret;
> +}
> +
> +static int vmgmt_fpga_write(struct fpga_manager *mgr, const char *buf,
> +                         size_t count) {
> +     struct fpga_device *fdev = mgr->priv;
> +     int ret;
> +
> +     ret = rm_queue_data_init(fdev->fw.cmd, buf, count);
> +     if (ret) {
> +             fdev->state = FPGA_MGR_STATE_WRITE_ERR;
> +             rm_queue_destory_cmd(fdev->fw.cmd);
> +             return ret;
> +     }
> +
> +     fdev->state = FPGA_MGR_STATE_WRITE;
> +     return ret;
> +}
> +
> +static int vmgmt_fpga_write_complete(struct fpga_manager *mgr,
> +                                  struct fpga_image_info *info) {
> +     struct fpga_device *fdev = mgr->priv;
> +     int ret;
> +
> +     ret = rm_queue_send_cmd(fdev->fw.cmd, RM_CMD_WAIT_DOWNLOAD_TIMEOUT);
> +     if (ret) {
> +             fdev->state = FPGA_MGR_STATE_WRITE_COMPLETE_ERR;
> +             vmgmt_err(fdev->vdev, "Send cmd failed:%d, cid:%d", ret, fdev->fw.id);
> +     } else {
> +             fdev->state = FPGA_MGR_STATE_WRITE_COMPLETE;
> +     }
> +
> +     rm_queue_data_fini(fdev->fw.cmd);
> +     rm_queue_destory_cmd(fdev->fw.cmd);
> +     memset(&fdev->fw, 0, sizeof(fdev->fw));
> +     return ret;
> +}
> +
>  static enum fpga_mgr_states vmgmt_fpga_state(struct fpga_manager
> *mgr)  {
>       struct fpga_device *fdev = mgr->priv; @@ -51,6 +108,9 @@ static
> enum fpga_mgr_states vmgmt_fpga_state(struct fpga_manager *mgr)  }
>
>  static const struct fpga_manager_ops vmgmt_fpga_ops = {
> +     .write_init = vmgmt_fpga_write_init,
> +     .write = vmgmt_fpga_write,
> +     .write_complete = vmgmt_fpga_write_complete,
>       .state = vmgmt_fpga_state,
>  };
>
> @@ -96,6 +156,13 @@ static struct fpga_device *vmgmt_fpga_init(struct vmgmt_device *vdev)
>               return ERR_PTR(ret);
>       }
>
> +     ret = vmgmt_rm_get_fw_id(vdev->rdev, &vdev->intf_uuid);
> +     if (ret) {
> +             vmgmt_warn(vdev, "Failed to get interface uuid");
> +             ret = -EINVAL;
> +             goto unregister_fpga_mgr;
> +     }
> +
>       /* create fgpa bridge, region for the base shell */
>       fdev->bridge = fpga_bridge_register(dev, "AMD Versal FPGA Bridge",
>                                           &vmgmt_br_ops, fdev); @@
> -132,6 +199,149 @@ static struct fpga_device *vmgmt_fpga_init(struct vmgmt_device *vdev)
>       return ERR_PTR(ret);
>  }
>
> +static int vmgmt_region_program(struct fpga_region *region, const
> +void *data) {
> +     struct fpga_device *fdev = region->priv;
> +     struct vmgmt_device *vdev = fdev->vdev;
> +     const struct axlf *xclbin = data;
> +     struct fpga_image_info *info;
> +     int ret;
> +
> +     info = fpga_image_info_alloc(&vdev->pdev->dev);
> +     if (!info)
> +             return -ENOMEM;
> +
> +     region->info = info;
> +
> +     info->flags |= FPGA_MGR_PARTIAL_RECONFIG;
> +     info->count = xclbin->header.length;
> +     info->buf = (char *)xclbin;
> +
> +     ret = fpga_region_program_fpga(region);
> +     if (ret) {
> +             vmgmt_err(vdev, "Programming xclbin failed: %d", ret);
> +             goto exit;
> +     }
> +
> +     /* free bridges to allow reprogram */
> +     if (region->get_bridges)
> +             fpga_bridges_put(&region->bridge_list);
> +
> +exit:
> +     fpga_image_info_free(info);
> +     return ret;
> +}
> +
> +static int vmgmt_fpga_region_match(struct device *dev, const void
> +*data) {
> +     const struct vmgmt_fpga_region *arg = data;
> +     const struct fpga_region *match_region;
> +     struct fpga_device *fdev = arg->fdev;
> +     uuid_t compat_uuid;
> +
> +     if (dev->parent != &fdev->vdev->pdev->dev)
> +             return false;
> +
> +     match_region = to_fpga_region(dev);
> +
> +     import_uuid(&compat_uuid, (const char *)match_region->compat_id);
> +     if (uuid_equal(&compat_uuid, arg->uuid)) {
> +             vmgmt_dbg(fdev->vdev, "Region match found");
> +             return true;
> +     }
> +
> +     vmgmt_err(fdev->vdev, "download uuid %pUb is not the same as device uuid %pUb",
> +               arg->uuid, &compat_uuid);
> +     return false;
> +}
> +
> +static long vmgmt_ioctl(struct file *filep, unsigned int cmd,
> +unsigned long arg) {
> +     struct vmgmt_device *vdev = (struct vmgmt_device *)filep->private_data;
> +     struct vmgmt_fpga_region reg = { 0 };
> +     struct fpga_region *region = NULL;
> +     struct axlf *axlf = NULL;
> +     void *data = NULL;
> +     size_t size = 0;
> +     int ret = 0;
> +
> +     axlf = vmalloc(sizeof(*axlf));
> +     if (!axlf)
> +             return -ENOMEM;
> +
> +     ret = copy_from_user((void *)axlf, (void *)arg, sizeof(*axlf));
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to copy axlf: %d", ret);
> +             ret = -EFAULT;
> +             goto exit;
> +     }
> +
> +     ret = memcmp(axlf->magic, VERSAL_XCLBIN_MAGIC_ID,
> +                  sizeof(VERSAL_XCLBIN_MAGIC_ID));
> +     if (ret) {
> +             vmgmt_err(vdev, "unknown axlf magic %s", axlf->magic);
> +             ret = -EINVAL;
> +             goto exit;
> +     }
> +
> +     /* axlf should never be over 1G and less than size of struct axlf */
> +     size = axlf->header.length;
> +     if (size < sizeof(struct axlf) || size > 1024 * 1024 * 1024) {
> +             vmgmt_err(vdev, "axlf length %zu is invalid", size);
> +             ret = -EINVAL;
> +             goto exit;
> +     }
> +
> +     data = vmalloc(size);
> +     if (!data) {
> +             ret = -ENOMEM;
> +             goto exit;
> +     }
> +
> +     ret = copy_from_user((void *)data, (void *)arg, size);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to copy data: %d", ret);
> +             ret = -EFAULT;
> +             goto exit;
> +     }
> +
> +     switch (cmd) {
> +     case VERSAL_MGMT_LOAD_XCLBIN_IOCTL:
> +             vdev->fdev->fw.opcode = RM_QUEUE_OP_LOAD_XCLBIN;
> +             break;
> +     default:
> +             vmgmt_err(vdev, "Invalid IOCTL command: %d", cmd);
> +             ret = -EINVAL;
> +             goto exit;
> +     }
> +
> +     reg.uuid = &axlf->header.rom_uuid;
> +     reg.fdev = vdev->fdev;
> +
> +     region = fpga_region_class_find(NULL, &reg, vmgmt_fpga_region_match);
> +     if (!region) {
> +             vmgmt_err(vdev, "Failed to find compatible region");
> +             ret = -ENOENT;
> +             goto exit;
> +     }
> +
> +     ret = vmgmt_region_program(region, data);
> +     if (ret) {
> +             vmgmt_err(vdev, "Failed to program region");
> +             goto exit;
> +     }
> +
> +     vmgmt_info(vdev, "Downloaded axlf %pUb of size %zu Bytes",
> +                &axlf->header.uuid, size);
> +     uuid_copy(&vdev->xclbin_uuid, &axlf->header.uuid);
> +
> +exit:
> +     vfree(data);
> +     vfree(axlf);
> +
> +     return ret;
> +}
> +
>  static int vmgmt_open(struct inode *inode, struct file *filep)  {
>       struct vmgmt_device *vdev = vmgmt_inode_to_vdev(inode); @@
> -155,6 +365,7 @@ static const struct file_operations vmgmt_fops = {
>       .owner = THIS_MODULE,
>       .open = vmgmt_open,
>       .release = vmgmt_release,
> +     .unlocked_ioctl = vmgmt_ioctl,
>  };
>
>  static void vmgmt_chrdev_destroy(struct vmgmt_device *vdev) @@ -201,6
> +412,69 @@ static int vmgmt_chrdev_create(struct vmgmt_device *vdev)
>       return 0;
>  }
>
> +static enum fw_upload_err vmgmt_fw_prepare(struct fw_upload *fw_upload,
> +                                        const u8 *data, u32 size) {
> +     struct firmware_device *fwdev = fw_upload->dd_handle;
> +     struct axlf *xsabin = (struct axlf *)data;
> +     int ret;
> +
> +     ret = memcmp(xsabin->magic, VERSAL_XCLBIN_MAGIC_ID,
> +                  sizeof(VERSAL_XCLBIN_MAGIC_ID));
> +     if (ret) {
> +             vmgmt_err(fwdev->vdev, "Invalid device firmware");
> +             return FW_UPLOAD_ERR_INVALID_SIZE;
> +     }
> +
> +     /* Firmware size should never be over 1G and less than size of struct axlf */
> +     if (!size || size != xsabin->header.length || size < sizeof(*xsabin) ||
> +         size > 1024 * 1024 * 1024) {
> +             vmgmt_err(fwdev->vdev, "Invalid device firmware size");
> +             return FW_UPLOAD_ERR_INVALID_SIZE;
> +     }
> +
> +     ret = rm_queue_create_cmd(fwdev->vdev->rdev, RM_QUEUE_OP_LOAD_FW,
> +                               &fwdev->cmd);
> +     if (ret)
> +             return FW_UPLOAD_ERR_RW_ERROR;
> +
> +     uuid_copy(&fwdev->uuid, &xsabin->header.uuid);
> +     return FW_UPLOAD_ERR_NONE;
> +}
> +
> +static enum fw_upload_err vmgmt_fw_write(struct fw_upload *fw_upload,
> +                                      const u8 *data, u32 offset, u32 size,
> +                                      u32 *written) {
> +     struct firmware_device *fwdev = fw_upload->dd_handle;
> +     int ret;
> +
> +     ret = rm_queue_data_init(fwdev->cmd, data, size);
> +     if (ret)
> +             return FW_UPLOAD_ERR_RW_ERROR;
> +
> +     *written = size;
> +     return FW_UPLOAD_ERR_NONE;
> +}
> +
> +static enum fw_upload_err vmgmt_fw_poll_complete(struct fw_upload
> +*fw_upload) {
> +     struct firmware_device *fwdev = fw_upload->dd_handle;
> +     int ret;
> +
> +     vmgmt_info(fwdev->vdev, "Programming device firmware: %pUb",
> + &fwdev->uuid);
> +
> +     ret = rm_queue_send_cmd(fwdev->cmd, RM_CMD_WAIT_DOWNLOAD_TIMEOUT);
> +     if (ret) {
> +             vmgmt_err(fwdev->vdev, "Send cmd failedi:%d, cid %d", ret, fwdev->id);
> +             return FW_UPLOAD_ERR_HW_ERROR;
> +     }
> +

Basically I didn't see any difference on HW operations between FPGA reprogram & firmware loading. So why use different SW interfaces?

My idea is FPGA reprogramming is not just for image loading, but also device re-enumeration. As I mentioned before, programing the fpga region without notifying the impacted driver makes kernel crash.

I see there is an effort to introduce a unified FPGA reprograming interface that should address the concerns. I think we should stop adding vendor interfaces and make effort on the unified one.

https://lore.kernel.org/linux-fpga/20240726063819.2274324-1-nava.kishore.manne@amd.com/

> +     vmgmt_info(fwdev->vdev, "Successfully programmed device firmware: %pUb",
> +                &fwdev->uuid);
> +     return FW_UPLOAD_ERR_NONE;
> +}
> +
>  static void vmgmt_fw_cancel(struct fw_upload *fw_upload)  {
>       struct firmware_device *fwdev = fw_upload->dd_handle; @@ -208,8
> +482,26 @@ static void vmgmt_fw_cancel(struct fw_upload *fw_upload)
>       vmgmt_warn(fwdev->vdev, "canceled");

Nothing to do?


I'll stop here, please better organize the patches next time submitting to make reviewers easier, even if you know it is an RFC.

Thanks,
Yilun

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