blob: 6630aa817505fac78754f05ccb58482ceedc15f1 [file] [log] [blame]
// 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:
*/
/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
#define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
#define BO_LOCKED 0x4000
#define BO_PINNED 0x2000
static struct msm_gem_submit *submit_create(struct drm_device *dev,
struct msm_gpu *gpu, struct msm_gem_address_space *aspace,
struct msm_gpu_submitqueue *queue, uint32_t nr_bos,
uint32_t nr_cmds)
{
struct msm_gem_submit *submit;
uint64_t sz = struct_size(submit, bos, nr_bos) +
((u64)nr_cmds * sizeof(submit->cmd[0]));
if (sz > SIZE_MAX)
return NULL;
submit = kmalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY);
if (!submit)
return NULL;
submit->dev = dev;
submit->aspace = aspace;
submit->gpu = gpu;
submit->fence = NULL;
submit->cmd = (void *)&submit->bos[nr_bos];
submit->queue = queue;
submit->ring = gpu->rb[queue->prio];
/* initially, until copy_from_user() and bo lookup succeeds: */
submit->nr_bos = 0;
submit->nr_cmds = 0;
INIT_LIST_HEAD(&submit->node);
INIT_LIST_HEAD(&submit->bo_list);
return submit;
}
void msm_gem_submit_free(struct msm_gem_submit *submit)
{
dma_fence_put(submit->fence);
list_del(&submit->node);
put_pid(submit->pid);
msm_submitqueue_put(submit->queue);
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;
struct msm_gem_object *msm_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;
}
msm_obj = to_msm_bo(obj);
if (!list_empty(&msm_obj->submit_entry)) {
DRM_ERROR("handle %u at index %u already on submit list\n",
submit->bos[i].handle, i);
ret = -EINVAL;
goto out_unlock;
}
drm_gem_object_get(obj);
submit->bos[i].obj = msm_obj;
list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
}
out_unlock:
spin_unlock(&file->table_lock);
out:
submit->nr_bos = i;
return ret;
}
static void submit_unlock_unpin_bo(struct msm_gem_submit *submit,
int i, bool backoff)
{
struct msm_gem_object *msm_obj = submit->bos[i].obj;
if (submit->bos[i].flags & BO_PINNED)
msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
if (submit->bos[i].flags & BO_LOCKED)
dma_resv_unlock(msm_obj->base.resv);
if (backoff && !(submit->bos[i].flags & BO_VALID))
submit->bos[i].iova = 0;
submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
}
/* 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:
for (; i >= 0; i--)
submit_unlock_unpin_bo(submit, i, true);
if (slow_locked > 0)
submit_unlock_unpin_bo(submit, slow_locked, true);
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;
}
}
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 msm_gem_object *msm_obj = submit->bos[i].obj;
bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
if (!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_shared(msm_obj->base.resv,
1);
if (ret)
return ret;
}
if (no_implicit)
continue;
ret = msm_gem_sync_object(&msm_obj->base, submit->ring->fctx,
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 msm_gem_object *msm_obj = submit->bos[i].obj;
uint64_t iova;
/* if locking succeeded, pin bo: */
ret = msm_gem_get_and_pin_iova(&msm_obj->base,
submit->aspace, &iova);
if (ret)
break;
submit->bos[i].flags |= BO_PINNED;
if (iova == submit->bos[i].iova) {
submit->bos[i].flags |= BO_VALID;
} else {
submit->bos[i].iova = iova;
/* iova changed, so address in cmdstream is not valid: */
submit->bos[i].flags &= ~BO_VALID;
submit->valid = false;
}
}
return ret;
}
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, uint64_t 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(&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;
void __user *userptr =
u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
uint32_t off;
uint64_t iova;
bool valid;
if (copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc))) {
ret = -EFAULT;
goto out;
}
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(&obj->base);
return ret;
}
static void submit_cleanup(struct msm_gem_submit *submit)
{
unsigned i;
for (i = 0; i < submit->nr_bos; i++) {
struct msm_gem_object *msm_obj = submit->bos[i].obj;
submit_unlock_unpin_bo(submit, i, false);
list_del_init(&msm_obj->submit_entry);
drm_gem_object_put(&msm_obj->base);
}
}
struct msm_submit_post_dep {
struct drm_syncobj *syncobj;
uint64_t point;
struct dma_fence_chain *chain;
};
static struct drm_syncobj **msm_wait_deps(struct drm_device *dev,
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(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;
if (!dma_fence_match_context(fence, ring->fctx->context))
ret = dma_fence_wait(fence, true);
dma_fence_put(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 = kmalloc_array(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;
post_deps[i].chain = NULL;
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 =
kmalloc(sizeof(*post_deps[i].chain),
GFP_KERNEL);
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) {
kfree(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)
{
static atomic_t ident = ATOMIC_INIT(0);
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;
struct msm_gpu *gpu = priv->gpu;
struct sync_file *sync_file = NULL;
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;
struct pid *pid = get_pid(task_pid(current));
bool has_ww_ticket = false;
unsigned i;
int ret, submitid;
if (!gpu)
return -ENXIO;
if (args->pad)
return -EINVAL;
/* 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;
/* Get a unique identifier for the submission for logging purposes */
submitid = atomic_inc_return(&ident) - 1;
ring = gpu->rb[queue->prio];
trace_msm_gpu_submit(pid_nr(pid), ring->id, submitid,
args->nr_bos, args->nr_cmds);
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)
return -EINVAL;
/*
* Wait if the fence is from a foreign context, or if the fence
* array contains any fence from a foreign context.
*/
ret = 0;
if (!dma_fence_match_context(in_fence, ring->fctx->context))
ret = dma_fence_wait(in_fence, true);
dma_fence_put(in_fence);
if (ret)
return ret;
}
if (args->flags & MSM_SUBMIT_SYNCOBJ_IN) {
syncobjs_to_reset = msm_wait_deps(dev, file,
args->in_syncobjs,
args->nr_in_syncobjs,
args->syncobj_stride, ring);
if (IS_ERR(syncobjs_to_reset))
return PTR_ERR(syncobjs_to_reset);
}
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_post_unlock;
}
}
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
goto out_post_unlock;
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_unlock;
}
}
submit = submit_create(dev, gpu, ctx->aspace, queue, args->nr_bos,
args->nr_cmds);
if (!submit) {
ret = -ENOMEM;
goto out_unlock;
}
submit->pid = pid;
submit->ident = submitid;
if (args->flags & MSM_SUBMIT_SUDO)
submit->in_rb = true;
ret = submit_lookup_objects(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 drm_msm_gem_submit_cmd submit_cmd;
void __user *userptr =
u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
struct msm_gem_object *msm_obj;
uint64_t iova;
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);
ret = -EINVAL;
goto out;
}
ret = submit_bo(submit, submit_cmd.submit_idx,
&msm_obj, &iova, NULL);
if (ret)
goto out;
if (submit_cmd.size % 4) {
DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
submit_cmd.size);
ret = -EINVAL;
goto out;
}
if (!submit_cmd.size ||
((submit_cmd.size + submit_cmd.submit_offset) >
msm_obj->base.size)) {
DRM_ERROR("invalid cmdstream 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].iova = iova + submit_cmd.submit_offset;
submit->cmd[i].idx = submit_cmd.submit_idx;
if (submit->valid)
continue;
ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
submit_cmd.nr_relocs, submit_cmd.relocs);
if (ret)
goto out;
}
submit->nr_cmds = i;
submit->fence = msm_fence_alloc(ring->fctx);
if (IS_ERR(submit->fence)) {
ret = PTR_ERR(submit->fence);
submit->fence = NULL;
goto out;
}
if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
sync_file = sync_file_create(submit->fence);
if (!sync_file) {
ret = -ENOMEM;
goto out;
}
}
msm_gpu_submit(gpu, submit, ctx);
args->fence = submit->fence->seqno;
if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
fd_install(out_fence_fd, sync_file->file);
args->fence_fd = out_fence_fd;
}
msm_reset_syncobjs(syncobjs_to_reset, args->nr_in_syncobjs);
msm_process_post_deps(post_deps, args->nr_out_syncobjs,
submit->fence);
out:
submit_cleanup(submit);
if (has_ww_ticket)
ww_acquire_fini(&submit->ticket);
if (ret)
msm_gem_submit_free(submit);
out_unlock:
if (ret && (out_fence_fd >= 0))
put_unused_fd(out_fence_fd);
mutex_unlock(&dev->struct_mutex);
out_post_unlock:
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;
}