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drm/v3d: Detach job submissions IOCTLs to a new specific file

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We will include a new job submission type, the CPU job submission. For
readability and maintability, separate the job submission IOCTLs and
related operations from v3d_gem.c.

Minor fix in the CSD submission kernel doc:
CSD (texture formatting) -> CSD (compute shader).

Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231130164420.932823-5-mcanal@igalia.com
This commit is contained in:
Melissa Wen 2023-11-30 13:40:26 -03:00 committed by Maíra Canal
parent a8ad9d63a1
commit 9032d5f633
No known key found for this signature in database
GPG Key ID: 6E388F05AB35B7CF
4 changed files with 753 additions and 741 deletions
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3
drivers/gpu/drm/v3d/Makefile
View File

@ -12,7 +12,8 @@ v3d-y := \
v3d_perfmon.o \
v3d_trace_points.o \
v3d_sched.o \
v3d_sysfs.o
v3d_sysfs.o \
v3d_submit.o
v3d-$(CONFIG_DEBUG_FS) += v3d_debugfs.o

12
drivers/gpu/drm/v3d/v3d_drv.h
View File

@ -401,17 +401,19 @@ struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue queue);
/* v3d_gem.c */
int v3d_gem_init(struct drm_device *dev);
void v3d_gem_destroy(struct drm_device *dev);
void v3d_reset(struct v3d_dev *v3d);
void v3d_invalidate_caches(struct v3d_dev *v3d);
void v3d_clean_caches(struct v3d_dev *v3d);
/* v3d_submit.c */
void v3d_job_cleanup(struct v3d_job *job);
void v3d_job_put(struct v3d_job *job);
int v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
void v3d_job_cleanup(struct v3d_job *job);
void v3d_job_put(struct v3d_job *job);
void v3d_reset(struct v3d_dev *v3d);
void v3d_invalidate_caches(struct v3d_dev *v3d);
void v3d_clean_caches(struct v3d_dev *v3d);
/* v3d_irq.c */
int v3d_irq_init(struct v3d_dev *v3d);

735
drivers/gpu/drm/v3d/v3d_gem.c
View File

@ -11,8 +11,6 @@
#include <linux/uaccess.h>
#include <drm/drm_managed.h>
#include <drm/drm_syncobj.h>
#include <uapi/drm/v3d_drm.h>
#include "v3d_drv.h"
#include "v3d_regs.h"
@ -241,739 +239,6 @@ v3d_invalidate_caches(struct v3d_dev *v3d)
v3d_invalidate_slices(v3d, 0);
}
/* Takes the reservation lock on all the BOs being referenced, so that
* at queue submit time we can update the reservations.
*
* We don't lock the RCL the tile alloc/state BOs, or overflow memory
* (all of which are on exec->unref_list). They're entirely private
* to v3d, so we don't attach dma-buf fences to them.
*/
static int
v3d_lock_bo_reservations(struct v3d_job *job,
struct ww_acquire_ctx *acquire_ctx)
{
int i, ret;
ret = drm_gem_lock_reservations(job->bo, job->bo_count, acquire_ctx);
if (ret)
return ret;
for (i = 0; i < job->bo_count; i++) {
ret = dma_resv_reserve_fences(job->bo[i]->resv, 1);
if (ret)
goto fail;
ret = drm_sched_job_add_implicit_dependencies(&job->base,
job->bo[i], true);
if (ret)
goto fail;
}
return 0;
fail:
drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
return ret;
}
/**
* v3d_lookup_bos() - Sets up job->bo[] with the GEM objects
* referenced by the job.
* @dev: DRM device
* @file_priv: DRM file for this fd
* @job: V3D job being set up
* @bo_handles: GEM handles
* @bo_count: Number of GEM handles passed in
*
* The command validator needs to reference BOs by their index within
* the submitted job's BO list. This does the validation of the job's
* BO list and reference counting for the lifetime of the job.
*
* Note that this function doesn't need to unreference the BOs on
* failure, because that will happen at v3d_exec_cleanup() time.
*/
static int
v3d_lookup_bos(struct drm_device *dev,
struct drm_file *file_priv,
struct v3d_job *job,
u64 bo_handles,
u32 bo_count)
{
job->bo_count = bo_count;
if (!job->bo_count) {
/* See comment on bo_index for why we have to check
* this.
*/
DRM_DEBUG("Rendering requires BOs\n");
return -EINVAL;
}
return drm_gem_objects_lookup(file_priv,
(void __user *)(uintptr_t)bo_handles,
job->bo_count, &job->bo);
}
static void
v3d_job_free(struct kref *ref)
{
struct v3d_job *job = container_of(ref, struct v3d_job, refcount);
int i;
if (job->bo) {
for (i = 0; i < job->bo_count; i++)
drm_gem_object_put(job->bo[i]);
kvfree(job->bo);
}
dma_fence_put(job->irq_fence);
dma_fence_put(job->done_fence);
if (job->perfmon)
v3d_perfmon_put(job->perfmon);
kfree(job);
}
static void
v3d_render_job_free(struct kref *ref)
{
struct v3d_render_job *job = container_of(ref, struct v3d_render_job,
base.refcount);
struct v3d_bo *bo, *save;
list_for_each_entry_safe(bo, save, &job->unref_list, unref_head) {
drm_gem_object_put(&bo->base.base);
}
v3d_job_free(ref);
}
void v3d_job_cleanup(struct v3d_job *job)
{
if (!job)
return;
drm_sched_job_cleanup(&job->base);
v3d_job_put(job);
}
void v3d_job_put(struct v3d_job *job)
{
kref_put(&job->refcount, job->free);
}
static int
v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
void **container, size_t size, void (*free)(struct kref *ref),
u32 in_sync, struct v3d_submit_ext *se, enum v3d_queue queue)
{
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct v3d_job *job;
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
int ret, i;
*container = kcalloc(1, size, GFP_KERNEL);
if (!*container) {
DRM_ERROR("Cannot allocate memory for v3d job.");
return -ENOMEM;
}
job = *container;
job->v3d = v3d;
job->free = free;
job->file = file_priv;
ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
1, v3d_priv);
if (ret)
goto fail;
if (has_multisync) {
if (se->in_sync_count && se->wait_stage == queue) {
struct drm_v3d_sem __user *handle = u64_to_user_ptr(se->in_syncs);
for (i = 0; i < se->in_sync_count; i++) {
struct drm_v3d_sem in;
if (copy_from_user(&in, handle++, sizeof(in))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy wait dep handle.\n");
goto fail_deps;
}
ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in.handle, 0);
// TODO: Investigate why this was filtered out for the IOCTL.
if (ret && ret != -ENOENT)
goto fail_deps;
}
}
} else {
ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in_sync, 0);
// TODO: Investigate why this was filtered out for the IOCTL.
if (ret && ret != -ENOENT)
goto fail_deps;
}
kref_init(&job->refcount);
return 0;
fail_deps:
drm_sched_job_cleanup(&job->base);
fail:
kfree(*container);
*container = NULL;
return ret;
}
static void
v3d_push_job(struct v3d_job *job)
{
drm_sched_job_arm(&job->base);
job->done_fence = dma_fence_get(&job->base.s_fence->finished);
/* put by scheduler job completion */
kref_get(&job->refcount);
drm_sched_entity_push_job(&job->base);
}
static void
v3d_attach_fences_and_unlock_reservation(struct drm_file *file_priv,
struct v3d_job *job,
struct ww_acquire_ctx *acquire_ctx,
u32 out_sync,
struct v3d_submit_ext *se,
struct dma_fence *done_fence)
{
struct drm_syncobj *sync_out;
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
int i;
for (i = 0; i < job->bo_count; i++) {
/* XXX: Use shared fences for read-only objects. */
dma_resv_add_fence(job->bo[i]->resv, job->done_fence,
DMA_RESV_USAGE_WRITE);
}
drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
/* Update the return sync object for the job */
/* If it only supports a single signal semaphore*/
if (!has_multisync) {
sync_out = drm_syncobj_find(file_priv, out_sync);
if (sync_out) {
drm_syncobj_replace_fence(sync_out, done_fence);
drm_syncobj_put(sync_out);
}
return;
}
/* If multiple semaphores extension is supported */
if (se->out_sync_count) {
for (i = 0; i < se->out_sync_count; i++) {
drm_syncobj_replace_fence(se->out_syncs[i].syncobj,
done_fence);
drm_syncobj_put(se->out_syncs[i].syncobj);
}
kvfree(se->out_syncs);
}
}
static void
v3d_put_multisync_post_deps(struct v3d_submit_ext *se)
{
unsigned int i;
if (!(se && se->out_sync_count))
return;
for (i = 0; i < se->out_sync_count; i++)
drm_syncobj_put(se->out_syncs[i].syncobj);
kvfree(se->out_syncs);
}
static int
v3d_get_multisync_post_deps(struct drm_file *file_priv,
struct v3d_submit_ext *se,
u32 count, u64 handles)
{
struct drm_v3d_sem __user *post_deps;
int i, ret;
if (!count)
return 0;
se->out_syncs = (struct v3d_submit_outsync *)
kvmalloc_array(count,
sizeof(struct v3d_submit_outsync),
GFP_KERNEL);
if (!se->out_syncs)
return -ENOMEM;
post_deps = u64_to_user_ptr(handles);
for (i = 0; i < count; i++) {
struct drm_v3d_sem out;
if (copy_from_user(&out, post_deps++, sizeof(out))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy post dep handles\n");
goto fail;
}
se->out_syncs[i].syncobj = drm_syncobj_find(file_priv,
out.handle);
if (!se->out_syncs[i].syncobj) {
ret = -EINVAL;
goto fail;
}
}
se->out_sync_count = count;
return 0;
fail:
for (i--; i >= 0; i--)
drm_syncobj_put(se->out_syncs[i].syncobj);
kvfree(se->out_syncs);
return ret;
}
/* Get data for multiple binary semaphores synchronization. Parse syncobj
* to be signaled when job completes (out_sync).
*/
static int
v3d_get_multisync_submit_deps(struct drm_file *file_priv,
struct drm_v3d_extension __user *ext,
void *data)
{
struct drm_v3d_multi_sync multisync;
struct v3d_submit_ext *se = data;
int ret;
if (copy_from_user(&multisync, ext, sizeof(multisync)))
return -EFAULT;
if (multisync.pad)
return -EINVAL;
ret = v3d_get_multisync_post_deps(file_priv, data, multisync.out_sync_count,
multisync.out_syncs);
if (ret)
return ret;
se->in_sync_count = multisync.in_sync_count;
se->in_syncs = multisync.in_syncs;
se->flags |= DRM_V3D_EXT_ID_MULTI_SYNC;
se->wait_stage = multisync.wait_stage;
return 0;
}
/* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
* according to the extension id (name).
*/
static int
v3d_get_extensions(struct drm_file *file_priv,
u64 ext_handles,
void *data)
{
struct drm_v3d_extension __user *user_ext;
int ret;
user_ext = u64_to_user_ptr(ext_handles);
while (user_ext) {
struct drm_v3d_extension ext;
if (copy_from_user(&ext, user_ext, sizeof(ext))) {
DRM_DEBUG("Failed to copy submit extension\n");
return -EFAULT;
}
switch (ext.id) {
case DRM_V3D_EXT_ID_MULTI_SYNC:
ret = v3d_get_multisync_submit_deps(file_priv, user_ext, data);
if (ret)
return ret;
break;
default:
DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
return -EINVAL;
}
user_ext = u64_to_user_ptr(ext.next);
}
return 0;
}
/**
* v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* This is the main entrypoint for userspace to submit a 3D frame to
* the GPU. Userspace provides the binner command list (if
* applicable), and the kernel sets up the render command list to draw
* to the framebuffer described in the ioctl, using the command lists
* that the 3D engine's binner will produce.
*/
int
v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct drm_v3d_submit_cl *args = data;
struct v3d_submit_ext se = {0};
struct v3d_bin_job *bin = NULL;
struct v3d_render_job *render = NULL;
struct v3d_job *clean_job = NULL;
struct v3d_job *last_job;
struct ww_acquire_ctx acquire_ctx;
int ret = 0;
trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
if (args->pad)
return -EINVAL;
if (args->flags &&
args->flags & ~(DRM_V3D_SUBMIT_CL_FLUSH_CACHE |
DRM_V3D_SUBMIT_EXTENSION)) {
DRM_INFO("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&render, sizeof(*render),
v3d_render_job_free, args->in_sync_rcl, &se, V3D_RENDER);
if (ret)
goto fail;
render->start = args->rcl_start;
render->end = args->rcl_end;
INIT_LIST_HEAD(&render->unref_list);
if (args->bcl_start != args->bcl_end) {
ret = v3d_job_init(v3d, file_priv, (void *)&bin, sizeof(*bin),
v3d_job_free, args->in_sync_bcl, &se, V3D_BIN);
if (ret)
goto fail;
bin->start = args->bcl_start;
bin->end = args->bcl_end;
bin->qma = args->qma;
bin->qms = args->qms;
bin->qts = args->qts;
bin->render = render;
}
if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
if (ret)
goto fail;
last_job = clean_job;
} else {
last_job = &render->base;
}
ret = v3d_lookup_bos(dev, file_priv, last_job,
args->bo_handles, args->bo_handle_count);
if (ret)
goto fail;
ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
if (ret)
goto fail;
if (args->perfmon_id) {
render->base.perfmon = v3d_perfmon_find(v3d_priv,
args->perfmon_id);
if (!render->base.perfmon) {
ret = -ENOENT;
goto fail_perfmon;
}
}
mutex_lock(&v3d->sched_lock);
if (bin) {
bin->base.perfmon = render->base.perfmon;
v3d_perfmon_get(bin->base.perfmon);
v3d_push_job(&bin->base);
ret = drm_sched_job_add_dependency(&render->base.base,
dma_fence_get(bin->base.done_fence));
if (ret)
goto fail_unreserve;
}
v3d_push_job(&render->base);
if (clean_job) {
struct dma_fence *render_fence =
dma_fence_get(render->base.done_fence);
ret = drm_sched_job_add_dependency(&clean_job->base,
render_fence);
if (ret)
goto fail_unreserve;
clean_job->perfmon = render->base.perfmon;
v3d_perfmon_get(clean_job->perfmon);
v3d_push_job(clean_job);
}
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
last_job,
&acquire_ctx,
args->out_sync,
&se,
last_job->done_fence);
if (bin)
v3d_job_put(&bin->base);
v3d_job_put(&render->base);
if (clean_job)
v3d_job_put(clean_job);
return 0;
fail_unreserve:
mutex_unlock(&v3d->sched_lock);
fail_perfmon:
drm_gem_unlock_reservations(last_job->bo,
last_job->bo_count, &acquire_ctx);
fail:
v3d_job_cleanup((void *)bin);
v3d_job_cleanup((void *)render);
v3d_job_cleanup(clean_job);
v3d_put_multisync_post_deps(&se);
return ret;
}
/**
* v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* Userspace provides the register setup for the TFU, which we don't
* need to validate since the TFU is behind the MMU.
*/
int
v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct drm_v3d_submit_tfu *args = data;
struct v3d_submit_ext se = {0};
struct v3d_tfu_job *job = NULL;
struct ww_acquire_ctx acquire_ctx;
int ret = 0;
trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
DRM_DEBUG("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
v3d_job_free, args->in_sync, &se, V3D_TFU);
if (ret)
goto fail;
job->base.bo = kcalloc(ARRAY_SIZE(args->bo_handles),
sizeof(*job->base.bo), GFP_KERNEL);
if (!job->base.bo) {
ret = -ENOMEM;
goto fail;
}
job->args = *args;
for (job->base.bo_count = 0;
job->base.bo_count < ARRAY_SIZE(args->bo_handles);
job->base.bo_count++) {
struct drm_gem_object *bo;
if (!args->bo_handles[job->base.bo_count])
break;
bo = drm_gem_object_lookup(file_priv, args->bo_handles[job->base.bo_count]);
if (!bo) {
DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
job->base.bo_count,
args->bo_handles[job->base.bo_count]);
ret = -ENOENT;
goto fail;
}
job->base.bo[job->base.bo_count] = bo;
}
ret = v3d_lock_bo_reservations(&job->base, &acquire_ctx);
if (ret)
goto fail;
mutex_lock(&v3d->sched_lock);
v3d_push_job(&job->base);
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
&job->base, &acquire_ctx,
args->out_sync,
&se,
job->base.done_fence);
v3d_job_put(&job->base);
return 0;
fail:
v3d_job_cleanup((void *)job);
v3d_put_multisync_post_deps(&se);
return ret;
}
/**
* v3d_submit_csd_ioctl() - Submits a CSD (texture formatting) job to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* Userspace provides the register setup for the CSD, which we don't
* need to validate since the CSD is behind the MMU.
*/
int
v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct drm_v3d_submit_csd *args = data;
struct v3d_submit_ext se = {0};
struct v3d_csd_job *job = NULL;
struct v3d_job *clean_job = NULL;
struct ww_acquire_ctx acquire_ctx;
int ret;
trace_v3d_submit_csd_ioctl(&v3d->drm, args->cfg[5], args->cfg[6]);
if (args->pad)
return -EINVAL;
if (!v3d_has_csd(v3d)) {
DRM_DEBUG("Attempting CSD submit on non-CSD hardware\n");
return -EINVAL;
}
if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
DRM_INFO("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
v3d_job_free, args->in_sync, &se, V3D_CSD);
if (ret)
goto fail;
ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
if (ret)
goto fail;
job->args = *args;
ret = v3d_lookup_bos(dev, file_priv, clean_job,
args->bo_handles, args->bo_handle_count);
if (ret)
goto fail;
ret = v3d_lock_bo_reservations(clean_job, &acquire_ctx);
if (ret)
goto fail;
if (args->perfmon_id) {
job->base.perfmon = v3d_perfmon_find(v3d_priv,
args->perfmon_id);
if (!job->base.perfmon) {
ret = -ENOENT;
goto fail_perfmon;
}
}
mutex_lock(&v3d->sched_lock);
v3d_push_job(&job->base);
ret = drm_sched_job_add_dependency(&clean_job->base,
dma_fence_get(job->base.done_fence));
if (ret)
goto fail_unreserve;
v3d_push_job(clean_job);
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
clean_job,
&acquire_ctx,
args->out_sync,
&se,
clean_job->done_fence);
v3d_job_put(&job->base);
v3d_job_put(clean_job);
return 0;
fail_unreserve:
mutex_unlock(&v3d->sched_lock);
fail_perfmon:
drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
&acquire_ctx);
fail:
v3d_job_cleanup((void *)job);
v3d_job_cleanup(clean_job);
v3d_put_multisync_post_deps(&se);
return ret;
}
int
v3d_gem_init(struct drm_device *dev)
{

744
drivers/gpu/drm/v3d/v3d_submit.c Normal file
View File

@ -0,0 +1,744 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014-2018 Broadcom
* Copyright (C) 2023 Raspberry Pi
*/
#include <drm/drm_syncobj.h>
#include "v3d_drv.h"
#include "v3d_regs.h"
#include "v3d_trace.h"
/* Takes the reservation lock on all the BOs being referenced, so that
* at queue submit time we can update the reservations.
*
* We don't lock the RCL the tile alloc/state BOs, or overflow memory
* (all of which are on exec->unref_list). They're entirely private
* to v3d, so we don't attach dma-buf fences to them.
*/
static int
v3d_lock_bo_reservations(struct v3d_job *job,
struct ww_acquire_ctx *acquire_ctx)
{
int i, ret;
ret = drm_gem_lock_reservations(job->bo, job->bo_count, acquire_ctx);
if (ret)
return ret;
for (i = 0; i < job->bo_count; i++) {
ret = dma_resv_reserve_fences(job->bo[i]->resv, 1);
if (ret)
goto fail;
ret = drm_sched_job_add_implicit_dependencies(&job->base,
job->bo[i], true);
if (ret)
goto fail;
}
return 0;
fail:
drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
return ret;
}
/**
* v3d_lookup_bos() - Sets up job->bo[] with the GEM objects
* referenced by the job.
* @dev: DRM device
* @file_priv: DRM file for this fd
* @job: V3D job being set up
* @bo_handles: GEM handles
* @bo_count: Number of GEM handles passed in
*
* The command validator needs to reference BOs by their index within
* the submitted job's BO list. This does the validation of the job's
* BO list and reference counting for the lifetime of the job.
*
* Note that this function doesn't need to unreference the BOs on
* failure, because that will happen at v3d_exec_cleanup() time.
*/
static int
v3d_lookup_bos(struct drm_device *dev,
struct drm_file *file_priv,
struct v3d_job *job,
u64 bo_handles,
u32 bo_count)
{
job->bo_count = bo_count;
if (!job->bo_count) {
/* See comment on bo_index for why we have to check
* this.
*/
DRM_DEBUG("Rendering requires BOs\n");
return -EINVAL;
}
return drm_gem_objects_lookup(file_priv,
(void __user *)(uintptr_t)bo_handles,
job->bo_count, &job->bo);
}
static void
v3d_job_free(struct kref *ref)
{
struct v3d_job *job = container_of(ref, struct v3d_job, refcount);
int i;
if (job->bo) {
for (i = 0; i < job->bo_count; i++)
drm_gem_object_put(job->bo[i]);
kvfree(job->bo);
}
dma_fence_put(job->irq_fence);
dma_fence_put(job->done_fence);
if (job->perfmon)
v3d_perfmon_put(job->perfmon);
kfree(job);
}
static void
v3d_render_job_free(struct kref *ref)
{
struct v3d_render_job *job = container_of(ref, struct v3d_render_job,
base.refcount);
struct v3d_bo *bo, *save;
list_for_each_entry_safe(bo, save, &job->unref_list, unref_head) {
drm_gem_object_put(&bo->base.base);
}
v3d_job_free(ref);
}
void v3d_job_cleanup(struct v3d_job *job)
{
if (!job)
return;
drm_sched_job_cleanup(&job->base);
v3d_job_put(job);
}
void v3d_job_put(struct v3d_job *job)
{
kref_put(&job->refcount, job->free);
}
static int
v3d_job_init(struct v3d_dev *v3d, struct drm_file *file_priv,
void **container, size_t size, void (*free)(struct kref *ref),
u32 in_sync, struct v3d_submit_ext *se, enum v3d_queue queue)
{
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct v3d_job *job;
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
int ret, i;
*container = kcalloc(1, size, GFP_KERNEL);
if (!*container) {
DRM_ERROR("Cannot allocate memory for v3d job.");
return -ENOMEM;
}
job = *container;
job->v3d = v3d;
job->free = free;
job->file = file_priv;
ret = drm_sched_job_init(&job->base, &v3d_priv->sched_entity[queue],
1, v3d_priv);
if (ret)
goto fail;
if (has_multisync) {
if (se->in_sync_count && se->wait_stage == queue) {
struct drm_v3d_sem __user *handle = u64_to_user_ptr(se->in_syncs);
for (i = 0; i < se->in_sync_count; i++) {
struct drm_v3d_sem in;
if (copy_from_user(&in, handle++, sizeof(in))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy wait dep handle.\n");
goto fail_deps;
}
ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in.handle, 0);
// TODO: Investigate why this was filtered out for the IOCTL.
if (ret && ret != -ENOENT)
goto fail_deps;
}
}
} else {
ret = drm_sched_job_add_syncobj_dependency(&job->base, file_priv, in_sync, 0);
// TODO: Investigate why this was filtered out for the IOCTL.
if (ret && ret != -ENOENT)
goto fail_deps;
}
kref_init(&job->refcount);
return 0;
fail_deps:
drm_sched_job_cleanup(&job->base);
fail:
kfree(*container);
*container = NULL;
return ret;
}
static void
v3d_push_job(struct v3d_job *job)
{
drm_sched_job_arm(&job->base);
job->done_fence = dma_fence_get(&job->base.s_fence->finished);
/* put by scheduler job completion */
kref_get(&job->refcount);
drm_sched_entity_push_job(&job->base);
}
static void
v3d_attach_fences_and_unlock_reservation(struct drm_file *file_priv,
struct v3d_job *job,
struct ww_acquire_ctx *acquire_ctx,
u32 out_sync,
struct v3d_submit_ext *se,
struct dma_fence *done_fence)
{
struct drm_syncobj *sync_out;
bool has_multisync = se && (se->flags & DRM_V3D_EXT_ID_MULTI_SYNC);
int i;
for (i = 0; i < job->bo_count; i++) {
/* XXX: Use shared fences for read-only objects. */
dma_resv_add_fence(job->bo[i]->resv, job->done_fence,
DMA_RESV_USAGE_WRITE);
}
drm_gem_unlock_reservations(job->bo, job->bo_count, acquire_ctx);
/* Update the return sync object for the job */
/* If it only supports a single signal semaphore*/
if (!has_multisync) {
sync_out = drm_syncobj_find(file_priv, out_sync);
if (sync_out) {
drm_syncobj_replace_fence(sync_out, done_fence);
drm_syncobj_put(sync_out);
}
return;
}
/* If multiple semaphores extension is supported */
if (se->out_sync_count) {
for (i = 0; i < se->out_sync_count; i++) {
drm_syncobj_replace_fence(se->out_syncs[i].syncobj,
done_fence);
drm_syncobj_put(se->out_syncs[i].syncobj);
}
kvfree(se->out_syncs);
}
}
static void
v3d_put_multisync_post_deps(struct v3d_submit_ext *se)
{
unsigned int i;
if (!(se && se->out_sync_count))
return;
for (i = 0; i < se->out_sync_count; i++)
drm_syncobj_put(se->out_syncs[i].syncobj);
kvfree(se->out_syncs);
}
static int
v3d_get_multisync_post_deps(struct drm_file *file_priv,
struct v3d_submit_ext *se,
u32 count, u64 handles)
{
struct drm_v3d_sem __user *post_deps;
int i, ret;
if (!count)
return 0;
se->out_syncs = (struct v3d_submit_outsync *)
kvmalloc_array(count,
sizeof(struct v3d_submit_outsync),
GFP_KERNEL);
if (!se->out_syncs)
return -ENOMEM;
post_deps = u64_to_user_ptr(handles);
for (i = 0; i < count; i++) {
struct drm_v3d_sem out;
if (copy_from_user(&out, post_deps++, sizeof(out))) {
ret = -EFAULT;
DRM_DEBUG("Failed to copy post dep handles\n");
goto fail;
}
se->out_syncs[i].syncobj = drm_syncobj_find(file_priv,
out.handle);
if (!se->out_syncs[i].syncobj) {
ret = -EINVAL;
goto fail;
}
}
se->out_sync_count = count;
return 0;
fail:
for (i--; i >= 0; i--)
drm_syncobj_put(se->out_syncs[i].syncobj);
kvfree(se->out_syncs);
return ret;
}
/* Get data for multiple binary semaphores synchronization. Parse syncobj
* to be signaled when job completes (out_sync).
*/
static int
v3d_get_multisync_submit_deps(struct drm_file *file_priv,
struct drm_v3d_extension __user *ext,
void *data)
{
struct drm_v3d_multi_sync multisync;
struct v3d_submit_ext *se = data;
int ret;
if (copy_from_user(&multisync, ext, sizeof(multisync)))
return -EFAULT;
if (multisync.pad)
return -EINVAL;
ret = v3d_get_multisync_post_deps(file_priv, data, multisync.out_sync_count,
multisync.out_syncs);
if (ret)
return ret;
se->in_sync_count = multisync.in_sync_count;
se->in_syncs = multisync.in_syncs;
se->flags |= DRM_V3D_EXT_ID_MULTI_SYNC;
se->wait_stage = multisync.wait_stage;
return 0;
}
/* Whenever userspace sets ioctl extensions, v3d_get_extensions parses data
* according to the extension id (name).
*/
static int
v3d_get_extensions(struct drm_file *file_priv,
u64 ext_handles,
void *data)
{
struct drm_v3d_extension __user *user_ext;
int ret;
user_ext = u64_to_user_ptr(ext_handles);
while (user_ext) {
struct drm_v3d_extension ext;
if (copy_from_user(&ext, user_ext, sizeof(ext))) {
DRM_DEBUG("Failed to copy submit extension\n");
return -EFAULT;
}
switch (ext.id) {
case DRM_V3D_EXT_ID_MULTI_SYNC:
ret = v3d_get_multisync_submit_deps(file_priv, user_ext, data);
if (ret)
return ret;
break;
default:
DRM_DEBUG_DRIVER("Unknown extension id: %d\n", ext.id);
return -EINVAL;
}
user_ext = u64_to_user_ptr(ext.next);
}
return 0;
}
/**
* v3d_submit_cl_ioctl() - Submits a job (frame) to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* This is the main entrypoint for userspace to submit a 3D frame to
* the GPU. Userspace provides the binner command list (if
* applicable), and the kernel sets up the render command list to draw
* to the framebuffer described in the ioctl, using the command lists
* that the 3D engine's binner will produce.
*/
int
v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct drm_v3d_submit_cl *args = data;
struct v3d_submit_ext se = {0};
struct v3d_bin_job *bin = NULL;
struct v3d_render_job *render = NULL;
struct v3d_job *clean_job = NULL;
struct v3d_job *last_job;
struct ww_acquire_ctx acquire_ctx;
int ret = 0;
trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
if (args->pad)
return -EINVAL;
if (args->flags &&
args->flags & ~(DRM_V3D_SUBMIT_CL_FLUSH_CACHE |
DRM_V3D_SUBMIT_EXTENSION)) {
DRM_INFO("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&render, sizeof(*render),
v3d_render_job_free, args->in_sync_rcl, &se, V3D_RENDER);
if (ret)
goto fail;
render->start = args->rcl_start;
render->end = args->rcl_end;
INIT_LIST_HEAD(&render->unref_list);
if (args->bcl_start != args->bcl_end) {
ret = v3d_job_init(v3d, file_priv, (void *)&bin, sizeof(*bin),
v3d_job_free, args->in_sync_bcl, &se, V3D_BIN);
if (ret)
goto fail;
bin->start = args->bcl_start;
bin->end = args->bcl_end;
bin->qma = args->qma;
bin->qms = args->qms;
bin->qts = args->qts;
bin->render = render;
}
if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
if (ret)
goto fail;
last_job = clean_job;
} else {
last_job = &render->base;
}
ret = v3d_lookup_bos(dev, file_priv, last_job,
args->bo_handles, args->bo_handle_count);
if (ret)
goto fail;
ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
if (ret)
goto fail;
if (args->perfmon_id) {
render->base.perfmon = v3d_perfmon_find(v3d_priv,
args->perfmon_id);
if (!render->base.perfmon) {
ret = -ENOENT;
goto fail_perfmon;
}
}
mutex_lock(&v3d->sched_lock);
if (bin) {
bin->base.perfmon = render->base.perfmon;
v3d_perfmon_get(bin->base.perfmon);
v3d_push_job(&bin->base);
ret = drm_sched_job_add_dependency(&render->base.base,
dma_fence_get(bin->base.done_fence));
if (ret)
goto fail_unreserve;
}
v3d_push_job(&render->base);
if (clean_job) {
struct dma_fence *render_fence =
dma_fence_get(render->base.done_fence);
ret = drm_sched_job_add_dependency(&clean_job->base,
render_fence);
if (ret)
goto fail_unreserve;
clean_job->perfmon = render->base.perfmon;
v3d_perfmon_get(clean_job->perfmon);
v3d_push_job(clean_job);
}
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
last_job,
&acquire_ctx,
args->out_sync,
&se,
last_job->done_fence);
if (bin)
v3d_job_put(&bin->base);
v3d_job_put(&render->base);
if (clean_job)
v3d_job_put(clean_job);
return 0;
fail_unreserve:
mutex_unlock(&v3d->sched_lock);
fail_perfmon:
drm_gem_unlock_reservations(last_job->bo,
last_job->bo_count, &acquire_ctx);
fail:
v3d_job_cleanup((void *)bin);
v3d_job_cleanup((void *)render);
v3d_job_cleanup(clean_job);
v3d_put_multisync_post_deps(&se);
return ret;
}
/**
* v3d_submit_tfu_ioctl() - Submits a TFU (texture formatting) job to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* Userspace provides the register setup for the TFU, which we don't
* need to validate since the TFU is behind the MMU.
*/
int
v3d_submit_tfu_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct drm_v3d_submit_tfu *args = data;
struct v3d_submit_ext se = {0};
struct v3d_tfu_job *job = NULL;
struct ww_acquire_ctx acquire_ctx;
int ret = 0;
trace_v3d_submit_tfu_ioctl(&v3d->drm, args->iia);
if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
DRM_DEBUG("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
v3d_job_free, args->in_sync, &se, V3D_TFU);
if (ret)
goto fail;
job->base.bo = kcalloc(ARRAY_SIZE(args->bo_handles),
sizeof(*job->base.bo), GFP_KERNEL);
if (!job->base.bo) {
ret = -ENOMEM;
goto fail;
}
job->args = *args;
for (job->base.bo_count = 0;
job->base.bo_count < ARRAY_SIZE(args->bo_handles);
job->base.bo_count++) {
struct drm_gem_object *bo;
if (!args->bo_handles[job->base.bo_count])
break;
bo = drm_gem_object_lookup(file_priv, args->bo_handles[job->base.bo_count]);
if (!bo) {
DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
job->base.bo_count,
args->bo_handles[job->base.bo_count]);
ret = -ENOENT;
goto fail;
}
job->base.bo[job->base.bo_count] = bo;
}
ret = v3d_lock_bo_reservations(&job->base, &acquire_ctx);
if (ret)
goto fail;
mutex_lock(&v3d->sched_lock);
v3d_push_job(&job->base);
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
&job->base, &acquire_ctx,
args->out_sync,
&se,
job->base.done_fence);
v3d_job_put(&job->base);
return 0;
fail:
v3d_job_cleanup((void *)job);
v3d_put_multisync_post_deps(&se);
return ret;
}
/**
* v3d_submit_csd_ioctl() - Submits a CSD (compute shader) job to the V3D.
* @dev: DRM device
* @data: ioctl argument
* @file_priv: DRM file for this fd
*
* Userspace provides the register setup for the CSD, which we don't
* need to validate since the CSD is behind the MMU.
*/
int
v3d_submit_csd_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct v3d_dev *v3d = to_v3d_dev(dev);
struct v3d_file_priv *v3d_priv = file_priv->driver_priv;
struct drm_v3d_submit_csd *args = data;
struct v3d_submit_ext se = {0};
struct v3d_csd_job *job = NULL;
struct v3d_job *clean_job = NULL;
struct ww_acquire_ctx acquire_ctx;
int ret;
trace_v3d_submit_csd_ioctl(&v3d->drm, args->cfg[5], args->cfg[6]);
if (args->pad)
return -EINVAL;
if (!v3d_has_csd(v3d)) {
DRM_DEBUG("Attempting CSD submit on non-CSD hardware\n");
return -EINVAL;
}
if (args->flags && !(args->flags & DRM_V3D_SUBMIT_EXTENSION)) {
DRM_INFO("invalid flags: %d\n", args->flags);
return -EINVAL;
}
if (args->flags & DRM_V3D_SUBMIT_EXTENSION) {
ret = v3d_get_extensions(file_priv, args->extensions, &se);
if (ret) {
DRM_DEBUG("Failed to get extensions.\n");
return ret;
}
}
ret = v3d_job_init(v3d, file_priv, (void *)&job, sizeof(*job),
v3d_job_free, args->in_sync, &se, V3D_CSD);
if (ret)
goto fail;
ret = v3d_job_init(v3d, file_priv, (void *)&clean_job, sizeof(*clean_job),
v3d_job_free, 0, NULL, V3D_CACHE_CLEAN);
if (ret)
goto fail;
job->args = *args;
ret = v3d_lookup_bos(dev, file_priv, clean_job,
args->bo_handles, args->bo_handle_count);
if (ret)
goto fail;
ret = v3d_lock_bo_reservations(clean_job, &acquire_ctx);
if (ret)
goto fail;
if (args->perfmon_id) {
job->base.perfmon = v3d_perfmon_find(v3d_priv,
args->perfmon_id);
if (!job->base.perfmon) {
ret = -ENOENT;
goto fail_perfmon;
}
}
mutex_lock(&v3d->sched_lock);
v3d_push_job(&job->base);
ret = drm_sched_job_add_dependency(&clean_job->base,
dma_fence_get(job->base.done_fence));
if (ret)
goto fail_unreserve;
v3d_push_job(clean_job);
mutex_unlock(&v3d->sched_lock);
v3d_attach_fences_and_unlock_reservation(file_priv,
clean_job,
&acquire_ctx,
args->out_sync,
&se,
clean_job->done_fence);
v3d_job_put(&job->base);
v3d_job_put(clean_job);
return 0;
fail_unreserve:
mutex_unlock(&v3d->sched_lock);
fail_perfmon:
drm_gem_unlock_reservations(clean_job->bo, clean_job->bo_count,
&acquire_ctx);
fail:
v3d_job_cleanup((void *)job);
v3d_job_cleanup(clean_job);
v3d_put_multisync_post_deps(&se);
return ret;
}