OpenCloudOS-Kernel/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c

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/*
* Copyright (C) 2015 Etnaviv Project
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/dma-fence-array.h>
#include <linux/reservation.h>
#include <linux/sync_file.h>
#include "etnaviv_cmdbuf.h"
#include "etnaviv_drv.h"
#include "etnaviv_gpu.h"
#include "etnaviv_gem.h"
#include "etnaviv_perfmon.h"
#include "etnaviv_sched.h"
/*
* Cmdstream submission:
*/
#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
#define BO_LOCKED 0x4000
#define BO_PINNED 0x2000
static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
{
struct etnaviv_gem_submit *submit;
size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
submit = kzalloc(sz, GFP_KERNEL);
if (!submit)
return NULL;
submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
GFP_KERNEL);
if (!submit->pmrs) {
kfree(submit);
return NULL;
}
submit->nr_pmrs = nr_pmrs;
submit->gpu = gpu;
kref_init(&submit->refcount);
return submit;
}
static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
unsigned nr_bos)
{
struct drm_etnaviv_gem_submit_bo *bo;
unsigned i;
int ret = 0;
spin_lock(&file->table_lock);
for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
struct drm_gem_object *obj;
if (bo->flags & BO_INVALID_FLAGS) {
DRM_ERROR("invalid flags: %x\n", bo->flags);
ret = -EINVAL;
goto out_unlock;
}
submit->bos[i].flags = bo->flags;
/* 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, bo->handle);
if (!obj) {
DRM_ERROR("invalid handle %u at index %u\n",
bo->handle, i);
ret = -EINVAL;
goto out_unlock;
}
/*
* Take a refcount on the object. The file table lock
* prevents the object_idr's refcount on this being dropped.
*/
drm_gem_object_get(obj);
submit->bos[i].obj = to_etnaviv_bo(obj);
}
out_unlock:
submit->nr_bos = i;
spin_unlock(&file->table_lock);
return ret;
}
static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
{
if (submit->bos[i].flags & BO_LOCKED) {
struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
ww_mutex_unlock(&etnaviv_obj->resv->lock);
submit->bos[i].flags &= ~BO_LOCKED;
}
}
static int submit_lock_objects(struct etnaviv_gem_submit *submit,
struct ww_acquire_ctx *ticket)
{
int contended, slow_locked = -1, i, ret = 0;
retry:
for (i = 0; i < submit->nr_bos; i++) {
struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
if (slow_locked == i)
slow_locked = -1;
contended = i;
if (!(submit->bos[i].flags & BO_LOCKED)) {
ret = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock,
ticket);
if (ret == -EALREADY)
DRM_ERROR("BO at index %u already on submit list\n",
i);
if (ret)
goto fail;
submit->bos[i].flags |= BO_LOCKED;
}
}
ww_acquire_done(ticket);
return 0;
fail:
for (; i >= 0; i--)
submit_unlock_object(submit, i);
if (slow_locked > 0)
submit_unlock_object(submit, slow_locked);
if (ret == -EDEADLK) {
struct etnaviv_gem_object *etnaviv_obj;
etnaviv_obj = submit->bos[contended].obj;
/* we lost out in a seqno race, lock and retry.. */
ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock,
ticket);
if (!ret) {
submit->bos[contended].flags |= BO_LOCKED;
slow_locked = contended;
goto retry;
}
}
return ret;
}
static int submit_fence_sync(struct etnaviv_gem_submit *submit)
{
int i, ret = 0;
for (i = 0; i < submit->nr_bos; i++) {
struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
struct reservation_object *robj = bo->obj->resv;
if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
ret = reservation_object_reserve_shared(robj, 1);
if (ret)
return ret;
}
if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
continue;
if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
ret = reservation_object_get_fences_rcu(robj, &bo->excl,
&bo->nr_shared,
&bo->shared);
if (ret)
return ret;
} else {
bo->excl = reservation_object_get_excl_rcu(robj);
}
}
return ret;
}
static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
{
int i;
for (i = 0; i < submit->nr_bos; i++) {
struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
reservation_object_add_excl_fence(etnaviv_obj->resv,
submit->out_fence);
else
reservation_object_add_shared_fence(etnaviv_obj->resv,
submit->out_fence);
submit_unlock_object(submit, i);
}
}
static int submit_pin_objects(struct etnaviv_gem_submit *submit)
{
int i, ret = 0;
for (i = 0; i < submit->nr_bos; i++) {
struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
struct etnaviv_vram_mapping *mapping;
mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
submit->gpu);
if (IS_ERR(mapping)) {
ret = PTR_ERR(mapping);
break;
}
atomic_inc(&etnaviv_obj->gpu_active);
submit->bos[i].flags |= BO_PINNED;
submit->bos[i].mapping = mapping;
}
return ret;
}
static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
struct etnaviv_gem_submit_bo **bo)
{
if (idx >= submit->nr_bos) {
DRM_ERROR("invalid buffer index: %u (out of %u)\n",
idx, submit->nr_bos);
return -EINVAL;
}
*bo = &submit->bos[idx];
return 0;
}
/* process the reloc's and patch up the cmdstream as needed: */
static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
u32 nr_relocs)
{
u32 i, last_offset = 0;
u32 *ptr = stream;
int ret;
for (i = 0; i < nr_relocs; i++) {
const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
struct etnaviv_gem_submit_bo *bo;
u32 off;
if (unlikely(r->flags)) {
DRM_ERROR("invalid reloc flags\n");
return -EINVAL;
}
if (r->submit_offset % 4) {
DRM_ERROR("non-aligned reloc offset: %u\n",
r->submit_offset);
return -EINVAL;
}
/* offset in dwords: */
off = r->submit_offset / 4;
if ((off >= size ) ||
(off < last_offset)) {
DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
return -EINVAL;
}
ret = submit_bo(submit, r->reloc_idx, &bo);
if (ret)
return ret;
if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
DRM_ERROR("relocation %u outside object\n", i);
return -EINVAL;
}
ptr[off] = bo->mapping->iova + r->reloc_offset;
last_offset = off;
}
return 0;
}
static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
{
u32 i;
for (i = 0; i < submit->nr_pmrs; i++) {
const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
struct etnaviv_gem_submit_bo *bo;
int ret;
ret = submit_bo(submit, r->read_idx, &bo);
if (ret)
return ret;
/* at offset 0 a sequence number gets stored used for userspace sync */
if (r->read_offset == 0) {
DRM_ERROR("perfmon request: offset is 0");
return -EINVAL;
}
if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
DRM_ERROR("perfmon request: offset %u outside object", i);
return -EINVAL;
}
if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
DRM_ERROR("perfmon request: flags are not valid");
return -EINVAL;
}
if (etnaviv_pm_req_validate(r, exec_state)) {
DRM_ERROR("perfmon request: domain or signal not valid");
return -EINVAL;
}
submit->pmrs[i].flags = r->flags;
submit->pmrs[i].domain = r->domain;
submit->pmrs[i].signal = r->signal;
submit->pmrs[i].sequence = r->sequence;
submit->pmrs[i].offset = r->read_offset;
submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
}
return 0;
}
static void submit_cleanup(struct kref *kref)
{
struct etnaviv_gem_submit *submit =
container_of(kref, struct etnaviv_gem_submit, refcount);
unsigned i;
if (submit->runtime_resumed)
pm_runtime_put_autosuspend(submit->gpu->dev);
if (submit->cmdbuf.suballoc)
etnaviv_cmdbuf_free(&submit->cmdbuf);
for (i = 0; i < submit->nr_bos; i++) {
struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
/* unpin all objects */
if (submit->bos[i].flags & BO_PINNED) {
etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
atomic_dec(&etnaviv_obj->gpu_active);
submit->bos[i].mapping = NULL;
submit->bos[i].flags &= ~BO_PINNED;
}
/* if the GPU submit failed, objects might still be locked */
submit_unlock_object(submit, i);
drm_gem_object_put_unlocked(&etnaviv_obj->base);
}
wake_up_all(&submit->gpu->fence_event);
if (submit->in_fence)
dma_fence_put(submit->in_fence);
if (submit->out_fence) {
/* first remove from IDR, so fence can not be found anymore */
mutex_lock(&submit->gpu->fence_lock);
idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
mutex_unlock(&submit->gpu->fence_lock);
dma_fence_put(submit->out_fence);
}
kfree(submit->pmrs);
kfree(submit);
}
void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
{
kref_put(&submit->refcount, submit_cleanup);
}
int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct etnaviv_file_private *ctx = file->driver_priv;
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_gem_submit *args = data;
struct drm_etnaviv_gem_submit_reloc *relocs;
struct drm_etnaviv_gem_submit_pmr *pmrs;
struct drm_etnaviv_gem_submit_bo *bos;
struct etnaviv_gem_submit *submit;
struct etnaviv_gpu *gpu;
struct sync_file *sync_file = NULL;
struct ww_acquire_ctx ticket;
int out_fence_fd = -1;
void *stream;
int ret;
if (args->pipe >= ETNA_MAX_PIPES)
return -EINVAL;
gpu = priv->gpu[args->pipe];
if (!gpu)
return -ENXIO;
if (args->stream_size % 4) {
DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
args->stream_size);
return -EINVAL;
}
if (args->exec_state != ETNA_PIPE_3D &&
args->exec_state != ETNA_PIPE_2D &&
args->exec_state != ETNA_PIPE_VG) {
DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
return -EINVAL;
}
if (args->flags & ~ETNA_SUBMIT_FLAGS) {
DRM_ERROR("invalid flags: 0x%x\n", args->flags);
return -EINVAL;
}
/*
* Copy the command submission and bo array to kernel space in
* one go, and do this outside of any locks.
*/
bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
if (!bos || !relocs || !pmrs || !stream) {
ret = -ENOMEM;
goto err_submit_cmds;
}
ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
args->nr_bos * sizeof(*bos));
if (ret) {
ret = -EFAULT;
goto err_submit_cmds;
}
ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
args->nr_relocs * sizeof(*relocs));
if (ret) {
ret = -EFAULT;
goto err_submit_cmds;
}
ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
args->nr_pmrs * sizeof(*pmrs));
if (ret) {
ret = -EFAULT;
goto err_submit_cmds;
}
ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
args->stream_size);
if (ret) {
ret = -EFAULT;
goto err_submit_cmds;
}
if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
if (out_fence_fd < 0) {
ret = out_fence_fd;
goto err_submit_cmds;
}
}
ww_acquire_init(&ticket, &reservation_ww_class);
submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
if (!submit) {
ret = -ENOMEM;
goto err_submit_ww_acquire;
}
ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &submit->cmdbuf,
ALIGN(args->stream_size, 8) + 8);
if (ret)
goto err_submit_objects;
submit->cmdbuf.ctx = file->driver_priv;
submit->exec_state = args->exec_state;
submit->flags = args->flags;
ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
if (ret)
goto err_submit_objects;
if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
relocs, args->nr_relocs)) {
ret = -EINVAL;
goto err_submit_objects;
}
if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
submit->in_fence = sync_file_get_fence(args->fence_fd);
if (!submit->in_fence) {
ret = -EINVAL;
goto err_submit_objects;
}
}
ret = submit_pin_objects(submit);
if (ret)
goto err_submit_objects;
ret = submit_reloc(submit, stream, args->stream_size / 4,
relocs, args->nr_relocs);
if (ret)
goto err_submit_objects;
ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
if (ret)
goto err_submit_objects;
memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
ret = submit_lock_objects(submit, &ticket);
if (ret)
goto err_submit_objects;
ret = submit_fence_sync(submit);
if (ret)
goto err_submit_objects;
ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
if (ret)
goto err_submit_objects;
submit_attach_object_fences(submit);
if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
/*
* This can be improved: ideally we want to allocate the sync
* file before kicking off the GPU job and just attach the
* fence to the sync file here, eliminating the ENOMEM
* possibility at this stage.
*/
sync_file = sync_file_create(submit->out_fence);
if (!sync_file) {
ret = -ENOMEM;
goto err_submit_objects;
}
fd_install(out_fence_fd, sync_file->file);
}
args->fence_fd = out_fence_fd;
args->fence = submit->out_fence_id;
err_submit_objects:
etnaviv_submit_put(submit);
err_submit_ww_acquire:
ww_acquire_fini(&ticket);
err_submit_cmds:
if (ret && (out_fence_fd >= 0))
put_unused_fd(out_fence_fd);
if (stream)
kvfree(stream);
if (bos)
kvfree(bos);
if (relocs)
kvfree(relocs);
if (pmrs)
kvfree(pmrs);
return ret;
}