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linux-zen-server/drivers/gpu/drm/msm/msm_gem_submit.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/file.h>
#include <linux/sync_file.h>
#include <linux/uaccess.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_syncobj.h>
#include "msm_drv.h"
#include "msm_gpu.h"
#include "msm_gem.h"
#include "msm_gpu_trace.h"
/*
* Cmdstream submission:
*/
static struct msm_gem_submit *submit_create(struct drm_device *dev,
struct msm_gpu *gpu,
struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
uint32_t nr_cmds)
{
static atomic_t ident = ATOMIC_INIT(0);
struct msm_gem_submit *submit;
uint64_t sz;
int ret;
sz = struct_size(submit, bos, nr_bos) +
((u64)nr_cmds * sizeof(submit->cmd[0]));
if (sz > SIZE_MAX)
return ERR_PTR(-ENOMEM);
submit = kzalloc(sz, GFP_KERNEL);
if (!submit)
return ERR_PTR(-ENOMEM);
ret = drm_sched_job_init(&submit->base, queue->entity, queue);
if (ret) {
kfree(submit);
return ERR_PTR(ret);
}
kref_init(&submit->ref);
submit->dev = dev;
submit->aspace = queue->ctx->aspace;
submit->gpu = gpu;
submit->cmd = (void *)&submit->bos[nr_bos];
submit->queue = queue;
submit->pid = get_pid(task_pid(current));
submit->ring = gpu->rb[queue->ring_nr];
submit->fault_dumped = false;
/* Get a unique identifier for the submission for logging purposes */
submit->ident = atomic_inc_return(&ident) - 1;
INIT_LIST_HEAD(&submit->node);
return submit;
}
void __msm_gem_submit_destroy(struct kref *kref)
{
struct msm_gem_submit *submit =
container_of(kref, struct msm_gem_submit, ref);
unsigned i;
if (submit->fence_id) {
mutex_lock(&submit->queue->idr_lock);
idr_remove(&submit->queue->fence_idr, submit->fence_id);
mutex_unlock(&submit->queue->idr_lock);
}
dma_fence_put(submit->user_fence);
dma_fence_put(submit->hw_fence);
put_pid(submit->pid);
msm_submitqueue_put(submit->queue);
for (i = 0; i < submit->nr_cmds; i++)
kfree(submit->cmd[i].relocs);
kfree(submit);
}
static int submit_lookup_objects(struct msm_gem_submit *submit,
struct drm_msm_gem_submit *args, struct drm_file *file)
{
unsigned i;
int ret = 0;
for (i = 0; i < args->nr_bos; i++) {
struct drm_msm_gem_submit_bo submit_bo;
void __user *userptr =
u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
/* make sure we don't have garbage flags, in case we hit
* error path before flags is initialized:
*/
submit->bos[i].flags = 0;
if (copy_from_user(&submit_bo, userptr, sizeof(submit_bo))) {
ret = -EFAULT;
i = 0;
goto out;
}
/* at least one of READ and/or WRITE flags should be set: */
#define MANDATORY_FLAGS (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)
if ((submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) ||
!(submit_bo.flags & MANDATORY_FLAGS)) {
DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
ret = -EINVAL;
i = 0;
goto out;
}
submit->bos[i].handle = submit_bo.handle;
submit->bos[i].flags = submit_bo.flags;
/* in validate_objects() we figure out if this is true: */
submit->bos[i].iova = submit_bo.presumed;
}
spin_lock(&file->table_lock);
for (i = 0; i < args->nr_bos; i++) {
struct drm_gem_object *obj;
/* normally use drm_gem_object_lookup(), but for bulk lookup
* all under single table_lock just hit object_idr directly:
*/
obj = idr_find(&file->object_idr, submit->bos[i].handle);
if (!obj) {
DRM_ERROR("invalid handle %u at index %u\n", submit->bos[i].handle, i);
ret = -EINVAL;
goto out_unlock;
}
drm_gem_object_get(obj);
submit->bos[i].obj = to_msm_bo(obj);
}
out_unlock:
spin_unlock(&file->table_lock);
out:
submit->nr_bos = i;
return ret;
}
static int submit_lookup_cmds(struct msm_gem_submit *submit,
struct drm_msm_gem_submit *args, struct drm_file *file)
{
unsigned i;
size_t sz;
int ret = 0;
for (i = 0; i < args->nr_cmds; i++) {
struct drm_msm_gem_submit_cmd submit_cmd;
void __user *userptr =
u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
if (ret) {
ret = -EFAULT;
goto out;
}
/* validate input from userspace: */
switch (submit_cmd.type) {
case MSM_SUBMIT_CMD_BUF:
case MSM_SUBMIT_CMD_IB_TARGET_BUF:
case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
break;
default:
DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
return -EINVAL;
}
if (submit_cmd.size % 4) {
DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
submit_cmd.size);
ret = -EINVAL;
goto out;
}
submit->cmd[i].type = submit_cmd.type;
submit->cmd[i].size = submit_cmd.size / 4;
submit->cmd[i].offset = submit_cmd.submit_offset / 4;
submit->cmd[i].idx = submit_cmd.submit_idx;
submit->cmd[i].nr_relocs = submit_cmd.nr_relocs;
userptr = u64_to_user_ptr(submit_cmd.relocs);
sz = array_size(submit_cmd.nr_relocs,
sizeof(struct drm_msm_gem_submit_reloc));
/* check for overflow: */
if (sz == SIZE_MAX) {
ret = -ENOMEM;
goto out;
}
submit->cmd[i].relocs = kmalloc(sz, GFP_KERNEL);
if (!submit->cmd[i].relocs) {
ret = -ENOMEM;
goto out;
}
ret = copy_from_user(submit->cmd[i].relocs, userptr, sz);
if (ret) {
ret = -EFAULT;
goto out;
}
}
out:
return ret;
}
/* Unwind bo state, according to cleanup_flags. In the success case, only
* the lock is dropped at the end of the submit (and active/pin ref is dropped
* later when the submit is retired).
*/
static void submit_cleanup_bo(struct msm_gem_submit *submit, int i,
unsigned cleanup_flags)
{
struct drm_gem_object *obj = &submit->bos[i].obj->base;
unsigned flags = submit->bos[i].flags & cleanup_flags;
/*
* Clear flags bit before dropping lock, so that the msm_job_run()
* path isn't racing with submit_cleanup() (ie. the read/modify/
* write is protected by the obj lock in all paths)
*/
submit->bos[i].flags &= ~cleanup_flags;
if (flags & BO_VMA_PINNED)
msm_gem_unpin_vma(submit->bos[i].vma);
if (flags & BO_OBJ_PINNED)
msm_gem_unpin_locked(obj);
if (flags & BO_LOCKED)
dma_resv_unlock(obj->resv);
}
static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
{
unsigned cleanup_flags = BO_VMA_PINNED | BO_OBJ_PINNED | BO_LOCKED;
submit_cleanup_bo(submit, i, cleanup_flags);
if (!(submit->bos[i].flags & BO_VALID))
submit->bos[i].iova = 0;
}
/* This is where we make sure all the bo's are reserved and pin'd: */
static int submit_lock_objects(struct msm_gem_submit *submit)
{
int contended, slow_locked = -1, i, ret = 0;
retry:
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
if (slow_locked == i)
slow_locked = -1;
contended = i;
if (!(submit->bos[i].flags & BO_LOCKED)) {
ret = dma_resv_lock_interruptible(msm_obj->base.resv,
&submit->ticket);
if (ret)
goto fail;
submit->bos[i].flags |= BO_LOCKED;
}
}
ww_acquire_done(&submit->ticket);
return 0;
fail:
if (ret == -EALREADY) {
DRM_ERROR("handle %u at index %u already on submit list\n",
submit->bos[i].handle, i);
ret = -EINVAL;
}
for (; i >= 0; i--)
submit_unlock_unpin_bo(submit, i);
if (slow_locked > 0)
submit_unlock_unpin_bo(submit, slow_locked);
if (ret == -EDEADLK) {
struct msm_gem_object *msm_obj = submit->bos[contended].obj;
/* we lost out in a seqno race, lock and retry.. */
ret = dma_resv_lock_slow_interruptible(msm_obj->base.resv,
&submit->ticket);
if (!ret) {
submit->bos[contended].flags |= BO_LOCKED;
slow_locked = contended;
goto retry;
}
/* Not expecting -EALREADY here, if the bo was already
* locked, we should have gotten -EALREADY already from
* the dma_resv_lock_interruptable() call.
*/
WARN_ON_ONCE(ret == -EALREADY);
}
return ret;
}
static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
{
int i, ret = 0;
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = &submit->bos[i].obj->base;
bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
/* NOTE: _reserve_shared() must happen before
* _add_shared_fence(), which makes this a slightly
* strange place to call it. OTOH this is a
* convenient can-fail point to hook it in.
*/
ret = dma_resv_reserve_fences(obj->resv, 1);
if (ret)
return ret;
/* If userspace has determined that explicit fencing is
* used, it can disable implicit sync on the entire
* submit:
*/
if (no_implicit)
continue;
/* Otherwise userspace can ask for implicit sync to be
* disabled on specific buffers. This is useful for internal
* usermode driver managed buffers, suballocation, etc.
*/
if (submit->bos[i].flags & MSM_SUBMIT_BO_NO_IMPLICIT)
continue;
ret = drm_sched_job_add_implicit_dependencies(&submit->base,
obj,
write);
if (ret)
break;
}
return ret;
}
static int submit_pin_objects(struct msm_gem_submit *submit)
{
int i, ret = 0;
submit->valid = true;
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = &submit->bos[i].obj->base;
struct msm_gem_vma *vma;
/* if locking succeeded, pin bo: */
vma = msm_gem_get_vma_locked(obj, submit->aspace);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
break;
}
ret = msm_gem_pin_vma_locked(obj, vma);
if (ret)
break;
submit->bos[i].flags |= BO_OBJ_PINNED | BO_VMA_PINNED;
submit->bos[i].vma = vma;
if (vma->iova == submit->bos[i].iova) {
submit->bos[i].flags |= BO_VALID;
} else {
submit->bos[i].iova = vma->iova;
/* iova changed, so address in cmdstream is not valid: */
submit->bos[i].flags &= ~BO_VALID;
submit->valid = false;
}
}
return ret;
}
static void submit_attach_object_fences(struct msm_gem_submit *submit)
{
int i;
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = &submit->bos[i].obj->base;
if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
dma_resv_add_fence(obj->resv, submit->user_fence,
DMA_RESV_USAGE_WRITE);
else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
dma_resv_add_fence(obj->resv, submit->user_fence,
DMA_RESV_USAGE_READ);
}
}
static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
struct msm_gem_object **obj, uint64_t *iova, bool *valid)
{
if (idx >= submit->nr_bos) {
DRM_ERROR("invalid buffer index: %u (out of %u)\n",
idx, submit->nr_bos);
return -EINVAL;
}
if (obj)
*obj = submit->bos[idx].obj;
if (iova)
*iova = submit->bos[idx].iova;
if (valid)
*valid = !!(submit->bos[idx].flags & BO_VALID);
return 0;
}
/* process the reloc's and patch up the cmdstream as needed: */
static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
uint32_t offset, uint32_t nr_relocs, struct drm_msm_gem_submit_reloc *relocs)
{
uint32_t i, last_offset = 0;
uint32_t *ptr;
int ret = 0;
if (!nr_relocs)
return 0;
if (offset % 4) {
DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
return -EINVAL;
}
/* For now, just map the entire thing. Eventually we probably
* to do it page-by-page, w/ kmap() if not vmap()d..
*/
ptr = msm_gem_get_vaddr_locked(&obj->base);
if (IS_ERR(ptr)) {
ret = PTR_ERR(ptr);
DBG("failed to map: %d", ret);
return ret;
}
for (i = 0; i < nr_relocs; i++) {
struct drm_msm_gem_submit_reloc submit_reloc = relocs[i];
uint32_t off;
uint64_t iova;
bool valid;
if (submit_reloc.submit_offset % 4) {
DRM_ERROR("non-aligned reloc offset: %u\n",
submit_reloc.submit_offset);
ret = -EINVAL;
goto out;
}
/* offset in dwords: */
off = submit_reloc.submit_offset / 4;
if ((off >= (obj->base.size / 4)) ||
(off < last_offset)) {
DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
ret = -EINVAL;
goto out;
}
ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
if (ret)
goto out;
if (valid)
continue;
iova += submit_reloc.reloc_offset;
if (submit_reloc.shift < 0)
iova >>= -submit_reloc.shift;
else
iova <<= submit_reloc.shift;
ptr[off] = iova | submit_reloc.or;
last_offset = off;
}
out:
msm_gem_put_vaddr_locked(&obj->base);
return ret;
}
/* Cleanup submit at end of ioctl. In the error case, this also drops
* references, unpins, and drops active refcnt. In the non-error case,
* this is done when the submit is retired.
*/
static void submit_cleanup(struct msm_gem_submit *submit, bool error)
{
unsigned cleanup_flags = BO_LOCKED;
unsigned i;
if (error)
cleanup_flags |= BO_VMA_PINNED | BO_OBJ_PINNED;
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
submit_cleanup_bo(submit, i, cleanup_flags);
if (error)
drm_gem_object_put(&msm_obj->base);
}
}
void msm_submit_retire(struct msm_gem_submit *submit)
{
int i;
for (i = 0; i < submit->nr_bos; i++) {
struct drm_gem_object *obj = &submit->bos[i].obj->base;
drm_gem_object_put(obj);
}
}
struct msm_submit_post_dep {
struct drm_syncobj *syncobj;
uint64_t point;
struct dma_fence_chain *chain;
};
static struct drm_syncobj **msm_parse_deps(struct msm_gem_submit *submit,
struct drm_file *file,
uint64_t in_syncobjs_addr,
uint32_t nr_in_syncobjs,
size_t syncobj_stride,
struct msm_ringbuffer *ring)
{
struct drm_syncobj **syncobjs = NULL;
struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
int ret = 0;
uint32_t i, j;
syncobjs = kcalloc(nr_in_syncobjs, sizeof(*syncobjs),
GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
if (!syncobjs)
return ERR_PTR(-ENOMEM);
for (i = 0; i < nr_in_syncobjs; ++i) {
uint64_t address = in_syncobjs_addr + i * syncobj_stride;
struct dma_fence *fence;
if (copy_from_user(&syncobj_desc,
u64_to_user_ptr(address),
min(syncobj_stride, sizeof(syncobj_desc)))) {
ret = -EFAULT;
break;
}
if (syncobj_desc.point &&
!drm_core_check_feature(submit->dev, DRIVER_SYNCOBJ_TIMELINE)) {
ret = -EOPNOTSUPP;
break;
}
if (syncobj_desc.flags & ~MSM_SUBMIT_SYNCOBJ_FLAGS) {
ret = -EINVAL;
break;
}
ret = drm_syncobj_find_fence(file, syncobj_desc.handle,
syncobj_desc.point, 0, &fence);
if (ret)
break;
ret = drm_sched_job_add_dependency(&submit->base, fence);
if (ret)
break;
if (syncobj_desc.flags & MSM_SUBMIT_SYNCOBJ_RESET) {
syncobjs[i] =
drm_syncobj_find(file, syncobj_desc.handle);
if (!syncobjs[i]) {
ret = -EINVAL;
break;
}
}
}
if (ret) {
for (j = 0; j <= i; ++j) {
if (syncobjs[j])
drm_syncobj_put(syncobjs[j]);
}
kfree(syncobjs);
return ERR_PTR(ret);
}
return syncobjs;
}
static void msm_reset_syncobjs(struct drm_syncobj **syncobjs,
uint32_t nr_syncobjs)
{
uint32_t i;
for (i = 0; syncobjs && i < nr_syncobjs; ++i) {
if (syncobjs[i])
drm_syncobj_replace_fence(syncobjs[i], NULL);
}
}
static struct msm_submit_post_dep *msm_parse_post_deps(struct drm_device *dev,
struct drm_file *file,
uint64_t syncobjs_addr,
uint32_t nr_syncobjs,
size_t syncobj_stride)
{
struct msm_submit_post_dep *post_deps;
struct drm_msm_gem_submit_syncobj syncobj_desc = {0};
int ret = 0;
uint32_t i, j;
post_deps = kcalloc(nr_syncobjs, sizeof(*post_deps),
GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
if (!post_deps)
return ERR_PTR(-ENOMEM);
for (i = 0; i < nr_syncobjs; ++i) {
uint64_t address = syncobjs_addr + i * syncobj_stride;
if (copy_from_user(&syncobj_desc,
u64_to_user_ptr(address),
min(syncobj_stride, sizeof(syncobj_desc)))) {
ret = -EFAULT;
break;
}
post_deps[i].point = syncobj_desc.point;
if (syncobj_desc.flags) {
ret = -EINVAL;
break;
}
if (syncobj_desc.point) {
if (!drm_core_check_feature(dev,
DRIVER_SYNCOBJ_TIMELINE)) {
ret = -EOPNOTSUPP;
break;
}
post_deps[i].chain = dma_fence_chain_alloc();
if (!post_deps[i].chain) {
ret = -ENOMEM;
break;
}
}
post_deps[i].syncobj =
drm_syncobj_find(file, syncobj_desc.handle);
if (!post_deps[i].syncobj) {
ret = -EINVAL;
break;
}
}
if (ret) {
for (j = 0; j <= i; ++j) {
dma_fence_chain_free(post_deps[j].chain);
if (post_deps[j].syncobj)
drm_syncobj_put(post_deps[j].syncobj);
}
kfree(post_deps);
return ERR_PTR(ret);
}
return post_deps;
}
static void msm_process_post_deps(struct msm_submit_post_dep *post_deps,
uint32_t count, struct dma_fence *fence)
{
uint32_t i;
for (i = 0; post_deps && i < count; ++i) {
if (post_deps[i].chain) {
drm_syncobj_add_point(post_deps[i].syncobj,
post_deps[i].chain,
fence, post_deps[i].point);
post_deps[i].chain = NULL;
} else {
drm_syncobj_replace_fence(post_deps[i].syncobj,
fence);
}
}
}
int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct msm_drm_private *priv = dev->dev_private;
struct drm_msm_gem_submit *args = data;
struct msm_file_private *ctx = file->driver_priv;
struct msm_gem_submit *submit = NULL;
struct msm_gpu *gpu = priv->gpu;
struct msm_gpu_submitqueue *queue;
struct msm_ringbuffer *ring;
struct msm_submit_post_dep *post_deps = NULL;
struct drm_syncobj **syncobjs_to_reset = NULL;
int out_fence_fd = -1;
bool has_ww_ticket = false;
unsigned i;
int ret;
if (!gpu)
return -ENXIO;
if (args->pad)
return -EINVAL;
if (unlikely(!ctx->aspace) && !capable(CAP_SYS_RAWIO)) {
DRM_ERROR_RATELIMITED("IOMMU support or CAP_SYS_RAWIO required!\n");
return -EPERM;
}
/* for now, we just have 3d pipe.. eventually this would need to
* be more clever to dispatch to appropriate gpu module:
*/
if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
return -EINVAL;
if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
return -EINVAL;
if (args->flags & MSM_SUBMIT_SUDO) {
if (!IS_ENABLED(CONFIG_DRM_MSM_GPU_SUDO) ||
!capable(CAP_SYS_RAWIO))
return -EINVAL;
}
queue = msm_submitqueue_get(ctx, args->queueid);
if (!queue)
return -ENOENT;
ring = gpu->rb[queue->ring_nr];
if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
if (out_fence_fd < 0) {
ret = out_fence_fd;
goto out_post_unlock;
}
}
submit = submit_create(dev, gpu, queue, args->nr_bos, args->nr_cmds);
if (IS_ERR(submit)) {
ret = PTR_ERR(submit);
goto out_post_unlock;
}
trace_msm_gpu_submit(pid_nr(submit->pid), ring->id, submit->ident,
args->nr_bos, args->nr_cmds);
ret = mutex_lock_interruptible(&queue->lock);
if (ret)
goto out_post_unlock;
if (args->flags & MSM_SUBMIT_SUDO)
submit->in_rb = true;
if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
struct dma_fence *in_fence;
in_fence = sync_file_get_fence(args->fence_fd);
if (!in_fence) {
ret = -EINVAL;
goto out_unlock;
}
ret = drm_sched_job_add_dependency(&submit->base, in_fence);
if (ret)
goto out_unlock;
}
if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
syncobjs_to_reset = msm_parse_deps(submit, file,
args->in_syncobjs,
args->nr_in_syncobjs,
args->syncobj_stride, ring);
if (IS_ERR(syncobjs_to_reset)) {
ret = PTR_ERR(syncobjs_to_reset);
goto out_unlock;
}
}
if (args->flags & MSM_SUBMIT_SYNCOBJ_OUT) {
post_deps = msm_parse_post_deps(dev, file,
args->out_syncobjs,
args->nr_out_syncobjs,
args->syncobj_stride);
if (IS_ERR(post_deps)) {
ret = PTR_ERR(post_deps);
goto out_unlock;
}
}
ret = submit_lookup_objects(submit, args, file);
if (ret)
goto out;
ret = submit_lookup_cmds(submit, args, file);
if (ret)
goto out;
/* copy_*_user while holding a ww ticket upsets lockdep */
ww_acquire_init(&submit->ticket, &reservation_ww_class);
has_ww_ticket = true;
ret = submit_lock_objects(submit);
if (ret)
goto out;
ret = submit_fence_sync(submit, !!(args->flags & MSM_SUBMIT_NO_IMPLICIT));
if (ret)
goto out;
ret = submit_pin_objects(submit);
if (ret)
goto out;
for (i = 0; i < args->nr_cmds; i++) {
struct msm_gem_object *msm_obj;
uint64_t iova;
ret = submit_bo(submit, submit->cmd[i].idx,
&msm_obj, &iova, NULL);
if (ret)
goto out;
if (!submit->cmd[i].size ||
((submit->cmd[i].size + submit->cmd[i].offset) >
msm_obj->base.size / 4)) {
DRM_ERROR("invalid cmdstream size: %u\n", submit->cmd[i].size * 4);
ret = -EINVAL;
goto out;
}
submit->cmd[i].iova = iova + (submit->cmd[i].offset * 4);
if (submit->valid)
continue;
ret = submit_reloc(submit, msm_obj, submit->cmd[i].offset * 4,
submit->cmd[i].nr_relocs, submit->cmd[i].relocs);
if (ret)
goto out;
}
submit->nr_cmds = i;
mutex_lock(&queue->idr_lock);
/*
* If using userspace provided seqno fence, validate that the id
* is available before arming sched job. Since access to fence_idr
* is serialized on the queue lock, the slot should be still avail
* after the job is armed
*/
if ((args->flags & MSM_SUBMIT_FENCE_SN_IN) &&
idr_find(&queue->fence_idr, args->fence)) {
mutex_unlock(&queue->idr_lock);
ret = -EINVAL;
goto out;
}
drm_sched_job_arm(&submit->base);
submit->user_fence = dma_fence_get(&submit->base.s_fence->finished);
if (args->flags & MSM_SUBMIT_FENCE_SN_IN) {
/*
* Userspace has assigned the seqno fence that it wants
* us to use. It is an error to pick a fence sequence
* number that is not available.
*/
submit->fence_id = args->fence;
ret = idr_alloc_u32(&queue->fence_idr, submit->user_fence,
&submit->fence_id, submit->fence_id,
GFP_KERNEL);
/*
* We've already validated that the fence_id slot is valid,
* so if idr_alloc_u32 failed, it is a kernel bug
*/
WARN_ON(ret);
} else {
/*
* Allocate an id which can be used by WAIT_FENCE ioctl to map
* back to the underlying fence.
*/
submit->fence_id = idr_alloc_cyclic(&queue->fence_idr,
submit->user_fence, 1,
INT_MAX, GFP_KERNEL);
}
mutex_unlock(&queue->idr_lock);
if (submit->fence_id < 0) {
ret = submit->fence_id;
submit->fence_id = 0;
}
if (ret == 0 && args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
struct sync_file *sync_file = sync_file_create(submit->user_fence);
if (!sync_file) {
ret = -ENOMEM;
} else {
fd_install(out_fence_fd, sync_file->file);
args->fence_fd = out_fence_fd;
}
}
submit_attach_object_fences(submit);
/* The scheduler owns a ref now: */
msm_gem_submit_get(submit);
drm_sched_entity_push_job(&submit->base);
args->fence = submit->fence_id;
queue->last_fence = submit->fence_id;
msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
msm_process_post_deps(post_deps, args->nr_out_syncobjs,
submit->user_fence);
out:
submit_cleanup(submit, !!ret);
if (has_ww_ticket)
ww_acquire_fini(&submit->ticket);
out_unlock:
mutex_unlock(&queue->lock);
out_post_unlock:
if (ret && (out_fence_fd >= 0))
put_unused_fd(out_fence_fd);
if (!IS_ERR_OR_NULL(submit)) {
msm_gem_submit_put(submit);
} else {
/*
* If the submit hasn't yet taken ownership of the queue
* then we need to drop the reference ourself:
*/
msm_submitqueue_put(queue);
}
if (!IS_ERR_OR_NULL(post_deps)) {
for (i = 0; i < args->nr_out_syncobjs; ++i) {
kfree(post_deps[i].chain);
drm_syncobj_put(post_deps[i].syncobj);
}
kfree(post_deps);
}
if (!IS_ERR_OR_NULL(syncobjs_to_reset)) {
for (i = 0; i < args->nr_in_syncobjs; ++i) {
if (syncobjs_to_reset[i])
drm_syncobj_put(syncobjs_to_reset[i]);
}
kfree(syncobjs_to_reset);
}
return ret;
}
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