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|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2020-2023 Intel Corporation
*/
#include <drm/drm_file.h>
#include <linux/bitfield.h>
#include <linux/highmem.h>
#include <linux/kthread.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <uapi/drm/ivpu_accel.h>
#include "ivpu_drv.h"
#include "ivpu_hw.h"
#include "ivpu_ipc.h"
#include "ivpu_job.h"
#include "ivpu_jsm_msg.h"
#include "ivpu_pm.h"
#define CMD_BUF_IDX 0
#define JOB_ID_JOB_MASK GENMASK(7, 0)
#define JOB_ID_CONTEXT_MASK GENMASK(31, 8)
#define JOB_MAX_BUFFER_COUNT 65535
static unsigned int ivpu_tdr_timeout_ms;
module_param_named(tdr_timeout_ms, ivpu_tdr_timeout_ms, uint, 0644);
MODULE_PARM_DESC(tdr_timeout_ms, "Timeout for device hang detection, in milliseconds, 0 - default");
static void ivpu_cmdq_ring_db(struct ivpu_device *vdev, struct ivpu_cmdq *cmdq)
{
ivpu_hw_reg_db_set(vdev, cmdq->db_id);
}
static struct ivpu_cmdq *ivpu_cmdq_alloc(struct ivpu_file_priv *file_priv, u16 engine)
{
struct ivpu_device *vdev = file_priv->vdev;
struct vpu_job_queue_header *jobq_header;
struct ivpu_cmdq *cmdq;
cmdq = kzalloc(sizeof(*cmdq), GFP_KERNEL);
if (!cmdq)
return NULL;
cmdq->mem = ivpu_bo_alloc_internal(vdev, 0, SZ_4K, DRM_IVPU_BO_WC);
if (!cmdq->mem)
goto cmdq_free;
cmdq->db_id = file_priv->ctx.id + engine * ivpu_get_context_count(vdev);
cmdq->entry_count = (u32)((cmdq->mem->base.size - sizeof(struct vpu_job_queue_header)) /
sizeof(struct vpu_job_queue_entry));
cmdq->jobq = (struct vpu_job_queue *)cmdq->mem->kvaddr;
jobq_header = &cmdq->jobq->header;
jobq_header->engine_idx = engine;
jobq_header->head = 0;
jobq_header->tail = 0;
wmb(); /* Flush WC buffer for jobq->header */
return cmdq;
cmdq_free:
kfree(cmdq);
return NULL;
}
static void ivpu_cmdq_free(struct ivpu_file_priv *file_priv, struct ivpu_cmdq *cmdq)
{
if (!cmdq)
return;
ivpu_bo_free_internal(cmdq->mem);
kfree(cmdq);
}
static struct ivpu_cmdq *ivpu_cmdq_acquire(struct ivpu_file_priv *file_priv, u16 engine)
{
struct ivpu_device *vdev = file_priv->vdev;
struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];
int ret;
lockdep_assert_held(&file_priv->lock);
if (!cmdq) {
cmdq = ivpu_cmdq_alloc(file_priv, engine);
if (!cmdq)
return NULL;
file_priv->cmdq[engine] = cmdq;
}
if (cmdq->db_registered)
return cmdq;
ret = ivpu_jsm_register_db(vdev, file_priv->ctx.id, cmdq->db_id,
cmdq->mem->vpu_addr, cmdq->mem->base.size);
if (ret)
return NULL;
cmdq->db_registered = true;
return cmdq;
}
static void ivpu_cmdq_release_locked(struct ivpu_file_priv *file_priv, u16 engine)
{
struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];
lockdep_assert_held(&file_priv->lock);
if (cmdq) {
file_priv->cmdq[engine] = NULL;
if (cmdq->db_registered)
ivpu_jsm_unregister_db(file_priv->vdev, cmdq->db_id);
ivpu_cmdq_free(file_priv, cmdq);
}
}
void ivpu_cmdq_release_all(struct ivpu_file_priv *file_priv)
{
int i;
mutex_lock(&file_priv->lock);
for (i = 0; i < IVPU_NUM_ENGINES; i++)
ivpu_cmdq_release_locked(file_priv, i);
mutex_unlock(&file_priv->lock);
}
/*
* Mark the doorbell as unregistered and reset job queue pointers.
* This function needs to be called when the VPU hardware is restarted
* and FW looses job queue state. The next time job queue is used it
* will be registered again.
*/
static void ivpu_cmdq_reset_locked(struct ivpu_file_priv *file_priv, u16 engine)
{
struct ivpu_cmdq *cmdq = file_priv->cmdq[engine];
lockdep_assert_held(&file_priv->lock);
if (cmdq) {
cmdq->db_registered = false;
cmdq->jobq->header.head = 0;
cmdq->jobq->header.tail = 0;
wmb(); /* Flush WC buffer for jobq header */
}
}
static void ivpu_cmdq_reset_all(struct ivpu_file_priv *file_priv)
{
int i;
mutex_lock(&file_priv->lock);
for (i = 0; i < IVPU_NUM_ENGINES; i++)
ivpu_cmdq_reset_locked(file_priv, i);
mutex_unlock(&file_priv->lock);
}
void ivpu_cmdq_reset_all_contexts(struct ivpu_device *vdev)
{
struct ivpu_file_priv *file_priv;
unsigned long ctx_id;
xa_for_each(&vdev->context_xa, ctx_id, file_priv) {
file_priv = ivpu_file_priv_get_by_ctx_id(vdev, ctx_id);
if (!file_priv)
continue;
ivpu_cmdq_reset_all(file_priv);
ivpu_file_priv_put(&file_priv);
}
}
static int ivpu_cmdq_push_job(struct ivpu_cmdq *cmdq, struct ivpu_job *job)
{
struct ivpu_device *vdev = job->vdev;
struct vpu_job_queue_header *header = &cmdq->jobq->header;
struct vpu_job_queue_entry *entry;
u32 tail = READ_ONCE(header->tail);
u32 next_entry = (tail + 1) % cmdq->entry_count;
/* Check if there is space left in job queue */
if (next_entry == header->head) {
ivpu_dbg(vdev, JOB, "Job queue full: ctx %d engine %d db %d head %d tail %d\n",
job->file_priv->ctx.id, job->engine_idx, cmdq->db_id, header->head, tail);
return -EBUSY;
}
entry = &cmdq->jobq->job[tail];
entry->batch_buf_addr = job->cmd_buf_vpu_addr;
entry->job_id = job->job_id;
entry->flags = 0;
wmb(); /* Ensure that tail is updated after filling entry */
header->tail = next_entry;
wmb(); /* Flush WC buffer for jobq header */
return 0;
}
struct ivpu_fence {
struct dma_fence base;
spinlock_t lock; /* protects base */
struct ivpu_device *vdev;
};
static inline struct ivpu_fence *to_vpu_fence(struct dma_fence *fence)
{
return container_of(fence, struct ivpu_fence, base);
}
static const char *ivpu_fence_get_driver_name(struct dma_fence *fence)
{
return DRIVER_NAME;
}
static const char *ivpu_fence_get_timeline_name(struct dma_fence *fence)
{
struct ivpu_fence *ivpu_fence = to_vpu_fence(fence);
return dev_name(ivpu_fence->vdev->drm.dev);
}
static const struct dma_fence_ops ivpu_fence_ops = {
.get_driver_name = ivpu_fence_get_driver_name,
.get_timeline_name = ivpu_fence_get_timeline_name,
};
static struct dma_fence *ivpu_fence_create(struct ivpu_device *vdev)
{
struct ivpu_fence *fence;
fence = kzalloc(sizeof(*fence), GFP_KERNEL);
if (!fence)
return NULL;
fence->vdev = vdev;
spin_lock_init(&fence->lock);
dma_fence_init(&fence->base, &ivpu_fence_ops, &fence->lock, dma_fence_context_alloc(1), 1);
return &fence->base;
}
static void job_get(struct ivpu_job *job, struct ivpu_job **link)
{
struct ivpu_device *vdev = job->vdev;
kref_get(&job->ref);
*link = job;
ivpu_dbg(vdev, KREF, "Job get: id %u refcount %u\n", job->job_id, kref_read(&job->ref));
}
static void job_release(struct kref *ref)
{
struct ivpu_job *job = container_of(ref, struct ivpu_job, ref);
struct ivpu_device *vdev = job->vdev;
u32 i;
for (i = 0; i < job->bo_count; i++)
if (job->bos[i])
drm_gem_object_put(&job->bos[i]->base);
dma_fence_put(job->done_fence);
ivpu_file_priv_put(&job->file_priv);
ivpu_dbg(vdev, KREF, "Job released: id %u\n", job->job_id);
kfree(job);
/* Allow the VPU to get suspended, must be called after ivpu_file_priv_put() */
ivpu_rpm_put(vdev);
}
static void job_put(struct ivpu_job *job)
{
struct ivpu_device *vdev = job->vdev;
ivpu_dbg(vdev, KREF, "Job put: id %u refcount %u\n", job->job_id, kref_read(&job->ref));
kref_put(&job->ref, job_release);
}
static struct ivpu_job *
ivpu_create_job(struct ivpu_file_priv *file_priv, u32 engine_idx, u32 bo_count)
{
struct ivpu_device *vdev = file_priv->vdev;
struct ivpu_job *job;
int ret;
ret = ivpu_rpm_get(vdev);
if (ret < 0)
return NULL;
job = kzalloc(struct_size(job, bos, bo_count), GFP_KERNEL);
if (!job)
goto err_rpm_put;
kref_init(&job->ref);
job->vdev = vdev;
job->engine_idx = engine_idx;
job->bo_count = bo_count;
job->done_fence = ivpu_fence_create(vdev);
if (!job->done_fence) {
ivpu_warn_ratelimited(vdev, "Failed to create a fence\n");
goto err_free_job;
}
job->file_priv = ivpu_file_priv_get(file_priv);
ivpu_dbg(vdev, JOB, "Job created: ctx %2d engine %d", file_priv->ctx.id, job->engine_idx);
return job;
err_free_job:
kfree(job);
err_rpm_put:
ivpu_rpm_put(vdev);
return NULL;
}
static int ivpu_job_done(struct ivpu_device *vdev, u32 job_id, u32 job_status)
{
struct ivpu_job *job;
job = xa_erase(&vdev->submitted_jobs_xa, job_id);
if (!job)
return -ENOENT;
if (job->file_priv->has_mmu_faults)
job_status = VPU_JSM_STATUS_ABORTED;
job->bos[CMD_BUF_IDX]->job_status = job_status;
dma_fence_signal(job->done_fence);
ivpu_dbg(vdev, JOB, "Job complete: id %3u ctx %2d engine %d status 0x%x\n",
job->job_id, job->file_priv->ctx.id, job->engine_idx, job_status);
job_put(job);
return 0;
}
static void ivpu_job_done_message(struct ivpu_device *vdev, void *msg)
{
struct vpu_ipc_msg_payload_job_done *payload;
struct vpu_jsm_msg *job_ret_msg = msg;
int ret;
payload = (struct vpu_ipc_msg_payload_job_done *)&job_ret_msg->payload;
ret = ivpu_job_done(vdev, payload->job_id, payload->job_status);
if (ret)
ivpu_err(vdev, "Failed to finish job %d: %d\n", payload->job_id, ret);
}
void ivpu_jobs_abort_all(struct ivpu_device *vdev)
{
struct ivpu_job *job;
unsigned long id;
xa_for_each(&vdev->submitted_jobs_xa, id, job)
ivpu_job_done(vdev, id, VPU_JSM_STATUS_ABORTED);
}
static int ivpu_direct_job_submission(struct ivpu_job *job)
{
struct ivpu_file_priv *file_priv = job->file_priv;
struct ivpu_device *vdev = job->vdev;
struct xa_limit job_id_range;
struct ivpu_cmdq *cmdq;
int ret;
mutex_lock(&file_priv->lock);
cmdq = ivpu_cmdq_acquire(job->file_priv, job->engine_idx);
if (!cmdq) {
ivpu_warn(vdev, "Failed get job queue, ctx %d engine %d\n",
file_priv->ctx.id, job->engine_idx);
ret = -EINVAL;
goto err_unlock;
}
job_id_range.min = FIELD_PREP(JOB_ID_CONTEXT_MASK, (file_priv->ctx.id - 1));
job_id_range.max = job_id_range.min | JOB_ID_JOB_MASK;
job_get(job, &job);
ret = xa_alloc(&vdev->submitted_jobs_xa, &job->job_id, job, job_id_range, GFP_KERNEL);
if (ret) {
ivpu_warn_ratelimited(vdev, "Failed to allocate job id: %d\n", ret);
goto err_job_put;
}
ret = ivpu_cmdq_push_job(cmdq, job);
if (ret)
goto err_xa_erase;
ivpu_dbg(vdev, JOB, "Job submitted: id %3u addr 0x%llx ctx %2d engine %d next %d\n",
job->job_id, job->cmd_buf_vpu_addr, file_priv->ctx.id,
job->engine_idx, cmdq->jobq->header.tail);
if (ivpu_test_mode == IVPU_TEST_MODE_NULL_HW) {
ivpu_job_done(vdev, job->job_id, VPU_JSM_STATUS_SUCCESS);
cmdq->jobq->header.head = cmdq->jobq->header.tail;
wmb(); /* Flush WC buffer for jobq header */
} else {
ivpu_cmdq_ring_db(vdev, cmdq);
}
mutex_unlock(&file_priv->lock);
return 0;
err_xa_erase:
xa_erase(&vdev->submitted_jobs_xa, job->job_id);
err_job_put:
job_put(job);
err_unlock:
mutex_unlock(&file_priv->lock);
return ret;
}
static int
ivpu_job_prepare_bos_for_submit(struct drm_file *file, struct ivpu_job *job, u32 *buf_handles,
u32 buf_count, u32 commands_offset)
{
struct ivpu_file_priv *file_priv = file->driver_priv;
struct ivpu_device *vdev = file_priv->vdev;
struct ww_acquire_ctx acquire_ctx;
struct ivpu_bo *bo;
int ret;
u32 i;
for (i = 0; i < buf_count; i++) {
struct drm_gem_object *obj = drm_gem_object_lookup(file, buf_handles[i]);
if (!obj)
return -ENOENT;
job->bos[i] = to_ivpu_bo(obj);
ret = ivpu_bo_pin(job->bos[i]);
if (ret)
return ret;
}
bo = job->bos[CMD_BUF_IDX];
if (!dma_resv_test_signaled(bo->base.resv, DMA_RESV_USAGE_READ)) {
ivpu_warn(vdev, "Buffer is already in use\n");
return -EBUSY;
}
if (commands_offset >= bo->base.size) {
ivpu_warn(vdev, "Invalid command buffer offset %u\n", commands_offset);
return -EINVAL;
}
job->cmd_buf_vpu_addr = bo->vpu_addr + commands_offset;
ret = drm_gem_lock_reservations((struct drm_gem_object **)job->bos, 1, &acquire_ctx);
if (ret) {
ivpu_warn(vdev, "Failed to lock reservations: %d\n", ret);
return ret;
}
ret = dma_resv_reserve_fences(bo->base.resv, 1);
if (ret) {
ivpu_warn(vdev, "Failed to reserve fences: %d\n", ret);
goto unlock_reservations;
}
dma_resv_add_fence(bo->base.resv, job->done_fence, DMA_RESV_USAGE_WRITE);
unlock_reservations:
drm_gem_unlock_reservations((struct drm_gem_object **)job->bos, 1, &acquire_ctx);
wmb(); /* Flush write combining buffers */
return ret;
}
int ivpu_submit_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct ivpu_file_priv *file_priv = file->driver_priv;
struct ivpu_device *vdev = file_priv->vdev;
struct drm_ivpu_submit *params = data;
struct ivpu_job *job;
u32 *buf_handles;
int idx, ret;
if (params->engine > DRM_IVPU_ENGINE_COPY)
return -EINVAL;
if (params->buffer_count == 0 || params->buffer_count > JOB_MAX_BUFFER_COUNT)
return -EINVAL;
if (!IS_ALIGNED(params->commands_offset, 8))
return -EINVAL;
if (!file_priv->ctx.id)
return -EINVAL;
if (file_priv->has_mmu_faults)
return -EBADFD;
buf_handles = kcalloc(params->buffer_count, sizeof(u32), GFP_KERNEL);
if (!buf_handles)
return -ENOMEM;
ret = copy_from_user(buf_handles,
(void __user *)params->buffers_ptr,
params->buffer_count * sizeof(u32));
if (ret) {
ret = -EFAULT;
goto free_handles;
}
if (!drm_dev_enter(&vdev->drm, &idx)) {
ret = -ENODEV;
goto free_handles;
}
ivpu_dbg(vdev, JOB, "Submit ioctl: ctx %u buf_count %u\n",
file_priv->ctx.id, params->buffer_count);
job = ivpu_create_job(file_priv, params->engine, params->buffer_count);
if (!job) {
ivpu_err(vdev, "Failed to create job\n");
ret = -ENOMEM;
goto dev_exit;
}
ret = ivpu_job_prepare_bos_for_submit(file, job, buf_handles, params->buffer_count,
params->commands_offset);
if (ret) {
ivpu_err(vdev, "Failed to prepare job, ret %d\n", ret);
goto job_put;
}
ret = ivpu_direct_job_submission(job);
if (ret) {
dma_fence_signal(job->done_fence);
ivpu_err(vdev, "Failed to submit job to the HW, ret %d\n", ret);
}
job_put:
job_put(job);
dev_exit:
drm_dev_exit(idx);
free_handles:
kfree(buf_handles);
return ret;
}
static int ivpu_job_done_thread(void *arg)
{
struct ivpu_device *vdev = (struct ivpu_device *)arg;
struct ivpu_ipc_consumer cons;
struct vpu_jsm_msg jsm_msg;
bool jobs_submitted;
unsigned int timeout;
int ret;
ivpu_dbg(vdev, JOB, "Started %s\n", __func__);
ivpu_ipc_consumer_add(vdev, &cons, VPU_IPC_CHAN_JOB_RET);
while (!kthread_should_stop()) {
timeout = ivpu_tdr_timeout_ms ? ivpu_tdr_timeout_ms : vdev->timeout.tdr;
jobs_submitted = !xa_empty(&vdev->submitted_jobs_xa);
ret = ivpu_ipc_receive(vdev, &cons, NULL, &jsm_msg, timeout);
if (!ret) {
ivpu_job_done_message(vdev, &jsm_msg);
} else if (ret == -ETIMEDOUT) {
if (jobs_submitted && !xa_empty(&vdev->submitted_jobs_xa)) {
ivpu_err(vdev, "TDR detected, timeout %d ms", timeout);
ivpu_hw_diagnose_failure(vdev);
ivpu_pm_schedule_recovery(vdev);
}
}
}
ivpu_ipc_consumer_del(vdev, &cons);
ivpu_jobs_abort_all(vdev);
ivpu_dbg(vdev, JOB, "Stopped %s\n", __func__);
return 0;
}
int ivpu_job_done_thread_init(struct ivpu_device *vdev)
{
struct task_struct *thread;
thread = kthread_run(&ivpu_job_done_thread, (void *)vdev, "ivpu_job_done_thread");
if (IS_ERR(thread)) {
ivpu_err(vdev, "Failed to start job completion thread\n");
return -EIO;
}
get_task_struct(thread);
wake_up_process(thread);
vdev->job_done_thread = thread;
return 0;
}
void ivpu_job_done_thread_fini(struct ivpu_device *vdev)
{
kthread_stop(vdev->job_done_thread);
put_task_struct(vdev->job_done_thread);
}
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