android_kernel_xiaomi_sm8350/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
Dan Carpenter 9b8eb4d147 drm/vmwgfx: return -EFAULT for copy_to_user errors
copy_to/from_user() returns the number of bytes remaining to be copied
but we want to return a negative error code here.  This gets returned to
userspace.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-06-08 09:33:41 +10:00

727 lines
19 KiB
C

/**************************************************************************
*
* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "vmwgfx_drv.h"
#include "vmwgfx_reg.h"
#include "ttm/ttm_bo_api.h"
#include "ttm/ttm_placement.h"
static int vmw_cmd_invalid(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
return capable(CAP_SYS_ADMIN) ? : -EINVAL;
}
static int vmw_cmd_ok(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
return 0;
}
static int vmw_cmd_cid_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_cid_cmd {
SVGA3dCmdHeader header;
__le32 cid;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_cid_cmd, header);
if (likely(sw_context->cid_valid && cmd->cid == sw_context->last_cid))
return 0;
ret = vmw_context_check(dev_priv, sw_context->tfile, cmd->cid);
if (unlikely(ret != 0)) {
DRM_ERROR("Could not find or use context %u\n",
(unsigned) cmd->cid);
return ret;
}
sw_context->last_cid = cmd->cid;
sw_context->cid_valid = true;
return 0;
}
static int vmw_cmd_sid_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
uint32_t *sid)
{
if (*sid == SVGA3D_INVALID_ID)
return 0;
if (unlikely((!sw_context->sid_valid ||
*sid != sw_context->last_sid))) {
int real_id;
int ret = vmw_surface_check(dev_priv, sw_context->tfile,
*sid, &real_id);
if (unlikely(ret != 0)) {
DRM_ERROR("Could ot find or use surface 0x%08x "
"address 0x%08lx\n",
(unsigned int) *sid,
(unsigned long) sid);
return ret;
}
sw_context->last_sid = *sid;
sw_context->sid_valid = true;
*sid = real_id;
sw_context->sid_translation = real_id;
} else
*sid = sw_context->sid_translation;
return 0;
}
static int vmw_cmd_set_render_target_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_sid_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdSetRenderTarget body;
} *cmd;
int ret;
ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
if (unlikely(ret != 0))
return ret;
cmd = container_of(header, struct vmw_sid_cmd, header);
ret = vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.target.sid);
return ret;
}
static int vmw_cmd_surface_copy_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_sid_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdSurfaceCopy body;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_sid_cmd, header);
ret = vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.src.sid);
if (unlikely(ret != 0))
return ret;
return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.dest.sid);
}
static int vmw_cmd_stretch_blt_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_sid_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdSurfaceStretchBlt body;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_sid_cmd, header);
ret = vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.src.sid);
if (unlikely(ret != 0))
return ret;
return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.dest.sid);
}
static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_sid_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdBlitSurfaceToScreen body;
} *cmd;
cmd = container_of(header, struct vmw_sid_cmd, header);
return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.srcImage.sid);
}
static int vmw_cmd_present_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_sid_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdPresent body;
} *cmd;
cmd = container_of(header, struct vmw_sid_cmd, header);
return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.sid);
}
static int vmw_translate_guest_ptr(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGAGuestPtr *ptr,
struct vmw_dma_buffer **vmw_bo_p)
{
struct vmw_dma_buffer *vmw_bo = NULL;
struct ttm_buffer_object *bo;
uint32_t handle = ptr->gmrId;
struct vmw_relocation *reloc;
uint32_t cur_validate_node;
struct ttm_validate_buffer *val_buf;
int ret;
ret = vmw_user_dmabuf_lookup(sw_context->tfile, handle, &vmw_bo);
if (unlikely(ret != 0)) {
DRM_ERROR("Could not find or use GMR region.\n");
return -EINVAL;
}
bo = &vmw_bo->base;
if (unlikely(sw_context->cur_reloc >= VMWGFX_MAX_RELOCATIONS)) {
DRM_ERROR("Max number relocations per submission"
" exceeded\n");
ret = -EINVAL;
goto out_no_reloc;
}
reloc = &sw_context->relocs[sw_context->cur_reloc++];
reloc->location = ptr;
cur_validate_node = vmw_dmabuf_validate_node(bo, sw_context->cur_val_buf);
if (unlikely(cur_validate_node >= VMWGFX_MAX_GMRS)) {
DRM_ERROR("Max number of DMA buffers per submission"
" exceeded.\n");
ret = -EINVAL;
goto out_no_reloc;
}
reloc->index = cur_validate_node;
if (unlikely(cur_validate_node == sw_context->cur_val_buf)) {
val_buf = &sw_context->val_bufs[cur_validate_node];
val_buf->bo = ttm_bo_reference(bo);
val_buf->new_sync_obj_arg = (void *) dev_priv;
list_add_tail(&val_buf->head, &sw_context->validate_nodes);
++sw_context->cur_val_buf;
}
*vmw_bo_p = vmw_bo;
return 0;
out_no_reloc:
vmw_dmabuf_unreference(&vmw_bo);
vmw_bo_p = NULL;
return ret;
}
static int vmw_cmd_end_query(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_dma_buffer *vmw_bo;
struct vmw_query_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdEndQuery q;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_query_cmd, header);
ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
if (unlikely(ret != 0))
return ret;
ret = vmw_translate_guest_ptr(dev_priv, sw_context,
&cmd->q.guestResult,
&vmw_bo);
if (unlikely(ret != 0))
return ret;
vmw_dmabuf_unreference(&vmw_bo);
return 0;
}
static int vmw_cmd_wait_query(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_dma_buffer *vmw_bo;
struct vmw_query_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdWaitForQuery q;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_query_cmd, header);
ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
if (unlikely(ret != 0))
return ret;
ret = vmw_translate_guest_ptr(dev_priv, sw_context,
&cmd->q.guestResult,
&vmw_bo);
if (unlikely(ret != 0))
return ret;
vmw_dmabuf_unreference(&vmw_bo);
return 0;
}
static int vmw_cmd_dma(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_dma_buffer *vmw_bo = NULL;
struct ttm_buffer_object *bo;
struct vmw_surface *srf = NULL;
struct vmw_dma_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdSurfaceDMA dma;
} *cmd;
int ret;
cmd = container_of(header, struct vmw_dma_cmd, header);
ret = vmw_translate_guest_ptr(dev_priv, sw_context,
&cmd->dma.guest.ptr,
&vmw_bo);
if (unlikely(ret != 0))
return ret;
bo = &vmw_bo->base;
ret = vmw_user_surface_lookup_handle(dev_priv, sw_context->tfile,
cmd->dma.host.sid, &srf);
if (ret) {
DRM_ERROR("could not find surface\n");
goto out_no_reloc;
}
/**
* Patch command stream with device SID.
*/
cmd->dma.host.sid = srf->res.id;
vmw_kms_cursor_snoop(srf, sw_context->tfile, bo, header);
/**
* FIXME: May deadlock here when called from the
* command parsing code.
*/
vmw_surface_unreference(&srf);
out_no_reloc:
vmw_dmabuf_unreference(&vmw_bo);
return ret;
}
static int vmw_cmd_draw(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_draw_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdDrawPrimitives body;
} *cmd;
SVGA3dVertexDecl *decl = (SVGA3dVertexDecl *)(
(unsigned long)header + sizeof(*cmd));
SVGA3dPrimitiveRange *range;
uint32_t i;
uint32_t maxnum;
int ret;
ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
if (unlikely(ret != 0))
return ret;
cmd = container_of(header, struct vmw_draw_cmd, header);
maxnum = (header->size - sizeof(cmd->body)) / sizeof(*decl);
if (unlikely(cmd->body.numVertexDecls > maxnum)) {
DRM_ERROR("Illegal number of vertex declarations.\n");
return -EINVAL;
}
for (i = 0; i < cmd->body.numVertexDecls; ++i, ++decl) {
ret = vmw_cmd_sid_check(dev_priv, sw_context,
&decl->array.surfaceId);
if (unlikely(ret != 0))
return ret;
}
maxnum = (header->size - sizeof(cmd->body) -
cmd->body.numVertexDecls * sizeof(*decl)) / sizeof(*range);
if (unlikely(cmd->body.numRanges > maxnum)) {
DRM_ERROR("Illegal number of index ranges.\n");
return -EINVAL;
}
range = (SVGA3dPrimitiveRange *) decl;
for (i = 0; i < cmd->body.numRanges; ++i, ++range) {
ret = vmw_cmd_sid_check(dev_priv, sw_context,
&range->indexArray.surfaceId);
if (unlikely(ret != 0))
return ret;
}
return 0;
}
static int vmw_cmd_tex_state(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
SVGA3dCmdHeader *header)
{
struct vmw_tex_state_cmd {
SVGA3dCmdHeader header;
SVGA3dCmdSetTextureState state;
};
SVGA3dTextureState *last_state = (SVGA3dTextureState *)
((unsigned long) header + header->size + sizeof(header));
SVGA3dTextureState *cur_state = (SVGA3dTextureState *)
((unsigned long) header + sizeof(struct vmw_tex_state_cmd));
int ret;
ret = vmw_cmd_cid_check(dev_priv, sw_context, header);
if (unlikely(ret != 0))
return ret;
for (; cur_state < last_state; ++cur_state) {
if (likely(cur_state->name != SVGA3D_TS_BIND_TEXTURE))
continue;
ret = vmw_cmd_sid_check(dev_priv, sw_context,
&cur_state->value);
if (unlikely(ret != 0))
return ret;
}
return 0;
}
typedef int (*vmw_cmd_func) (struct vmw_private *,
struct vmw_sw_context *,
SVGA3dCmdHeader *);
#define VMW_CMD_DEF(cmd, func) \
[cmd - SVGA_3D_CMD_BASE] = func
static vmw_cmd_func vmw_cmd_funcs[SVGA_3D_CMD_MAX] = {
VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DEFINE, &vmw_cmd_invalid),
VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DESTROY, &vmw_cmd_invalid),
VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_COPY, &vmw_cmd_surface_copy_check),
VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_STRETCHBLT, &vmw_cmd_stretch_blt_check),
VMW_CMD_DEF(SVGA_3D_CMD_SURFACE_DMA, &vmw_cmd_dma),
VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DEFINE, &vmw_cmd_invalid),
VMW_CMD_DEF(SVGA_3D_CMD_CONTEXT_DESTROY, &vmw_cmd_invalid),
VMW_CMD_DEF(SVGA_3D_CMD_SETTRANSFORM, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETZRANGE, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERSTATE, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETRENDERTARGET,
&vmw_cmd_set_render_target_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETTEXTURESTATE, &vmw_cmd_tex_state),
VMW_CMD_DEF(SVGA_3D_CMD_SETMATERIAL, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTDATA, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETLIGHTENABLED, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETVIEWPORT, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SETCLIPPLANE, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_CLEAR, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_PRESENT, &vmw_cmd_present_check),
VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DEFINE, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SHADER_DESTROY, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_SET_SHADER_CONST, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_DRAW_PRIMITIVES, &vmw_cmd_draw),
VMW_CMD_DEF(SVGA_3D_CMD_SETSCISSORRECT, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_BEGIN_QUERY, &vmw_cmd_cid_check),
VMW_CMD_DEF(SVGA_3D_CMD_END_QUERY, &vmw_cmd_end_query),
VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_wait_query),
VMW_CMD_DEF(SVGA_3D_CMD_PRESENT_READBACK, &vmw_cmd_ok),
VMW_CMD_DEF(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN,
&vmw_cmd_blt_surf_screen_check)
};
static int vmw_cmd_check(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
void *buf, uint32_t *size)
{
uint32_t cmd_id;
uint32_t size_remaining = *size;
SVGA3dCmdHeader *header = (SVGA3dCmdHeader *) buf;
int ret;
cmd_id = ((uint32_t *)buf)[0];
if (cmd_id == SVGA_CMD_UPDATE) {
*size = 5 << 2;
return 0;
}
cmd_id = le32_to_cpu(header->id);
*size = le32_to_cpu(header->size) + sizeof(SVGA3dCmdHeader);
cmd_id -= SVGA_3D_CMD_BASE;
if (unlikely(*size > size_remaining))
goto out_err;
if (unlikely(cmd_id >= SVGA_3D_CMD_MAX - SVGA_3D_CMD_BASE))
goto out_err;
ret = vmw_cmd_funcs[cmd_id](dev_priv, sw_context, header);
if (unlikely(ret != 0))
goto out_err;
return 0;
out_err:
DRM_ERROR("Illegal / Invalid SVGA3D command: %d\n",
cmd_id + SVGA_3D_CMD_BASE);
return -EINVAL;
}
static int vmw_cmd_check_all(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
void *buf, uint32_t size)
{
int32_t cur_size = size;
int ret;
while (cur_size > 0) {
size = cur_size;
ret = vmw_cmd_check(dev_priv, sw_context, buf, &size);
if (unlikely(ret != 0))
return ret;
buf = (void *)((unsigned long) buf + size);
cur_size -= size;
}
if (unlikely(cur_size != 0)) {
DRM_ERROR("Command verifier out of sync.\n");
return -EINVAL;
}
return 0;
}
static void vmw_free_relocations(struct vmw_sw_context *sw_context)
{
sw_context->cur_reloc = 0;
}
static void vmw_apply_relocations(struct vmw_sw_context *sw_context)
{
uint32_t i;
struct vmw_relocation *reloc;
struct ttm_validate_buffer *validate;
struct ttm_buffer_object *bo;
for (i = 0; i < sw_context->cur_reloc; ++i) {
reloc = &sw_context->relocs[i];
validate = &sw_context->val_bufs[reloc->index];
bo = validate->bo;
reloc->location->offset += bo->offset;
reloc->location->gmrId = vmw_dmabuf_gmr(bo);
}
vmw_free_relocations(sw_context);
}
static void vmw_clear_validations(struct vmw_sw_context *sw_context)
{
struct ttm_validate_buffer *entry, *next;
list_for_each_entry_safe(entry, next, &sw_context->validate_nodes,
head) {
list_del(&entry->head);
vmw_dmabuf_validate_clear(entry->bo);
ttm_bo_unref(&entry->bo);
sw_context->cur_val_buf--;
}
BUG_ON(sw_context->cur_val_buf != 0);
}
static int vmw_validate_single_buffer(struct vmw_private *dev_priv,
struct ttm_buffer_object *bo)
{
int ret;
if (vmw_dmabuf_gmr(bo) != SVGA_GMR_NULL)
return 0;
/**
* Put BO in VRAM, only if there is space.
*/
ret = ttm_bo_validate(bo, &vmw_vram_sys_placement, true, false, false);
if (unlikely(ret == -ERESTARTSYS))
return ret;
/**
* Otherwise, set it up as GMR.
*/
if (vmw_dmabuf_gmr(bo) != SVGA_GMR_NULL)
return 0;
ret = vmw_gmr_bind(dev_priv, bo);
if (likely(ret == 0 || ret == -ERESTARTSYS))
return ret;
/**
* If that failed, try VRAM again, this time evicting
* previous contents.
*/
ret = ttm_bo_validate(bo, &vmw_vram_placement, true, false, false);
return ret;
}
static int vmw_validate_buffers(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context)
{
struct ttm_validate_buffer *entry;
int ret;
list_for_each_entry(entry, &sw_context->validate_nodes, head) {
ret = vmw_validate_single_buffer(dev_priv, entry->bo);
if (unlikely(ret != 0))
return ret;
}
return 0;
}
int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct vmw_private *dev_priv = vmw_priv(dev);
struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data;
struct drm_vmw_fence_rep fence_rep;
struct drm_vmw_fence_rep __user *user_fence_rep;
int ret;
void *user_cmd;
void *cmd;
uint32_t sequence;
struct vmw_sw_context *sw_context = &dev_priv->ctx;
struct vmw_master *vmaster = vmw_master(file_priv->master);
ret = ttm_read_lock(&vmaster->lock, true);
if (unlikely(ret != 0))
return ret;
ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
if (unlikely(ret != 0)) {
ret = -ERESTARTSYS;
goto out_no_cmd_mutex;
}
cmd = vmw_fifo_reserve(dev_priv, arg->command_size);
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving fifo space for commands.\n");
ret = -ENOMEM;
goto out_unlock;
}
user_cmd = (void __user *)(unsigned long)arg->commands;
ret = copy_from_user(cmd, user_cmd, arg->command_size);
if (unlikely(ret != 0)) {
ret = -EFAULT;
DRM_ERROR("Failed copying commands.\n");
goto out_commit;
}
sw_context->tfile = vmw_fpriv(file_priv)->tfile;
sw_context->cid_valid = false;
sw_context->sid_valid = false;
sw_context->cur_reloc = 0;
sw_context->cur_val_buf = 0;
INIT_LIST_HEAD(&sw_context->validate_nodes);
ret = vmw_cmd_check_all(dev_priv, sw_context, cmd, arg->command_size);
if (unlikely(ret != 0))
goto out_err;
ret = ttm_eu_reserve_buffers(&sw_context->validate_nodes,
dev_priv->val_seq++);
if (unlikely(ret != 0))
goto out_err;
ret = vmw_validate_buffers(dev_priv, sw_context);
if (unlikely(ret != 0))
goto out_err;
vmw_apply_relocations(sw_context);
if (arg->throttle_us) {
ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.fence_queue,
arg->throttle_us);
if (unlikely(ret != 0))
goto out_err;
}
vmw_fifo_commit(dev_priv, arg->command_size);
ret = vmw_fifo_send_fence(dev_priv, &sequence);
ttm_eu_fence_buffer_objects(&sw_context->validate_nodes,
(void *)(unsigned long) sequence);
vmw_clear_validations(sw_context);
mutex_unlock(&dev_priv->cmdbuf_mutex);
/*
* This error is harmless, because if fence submission fails,
* vmw_fifo_send_fence will sync.
*/
if (ret != 0)
DRM_ERROR("Fence submission error. Syncing.\n");
fence_rep.error = ret;
fence_rep.fence_seq = (uint64_t) sequence;
user_fence_rep = (struct drm_vmw_fence_rep __user *)
(unsigned long)arg->fence_rep;
/*
* copy_to_user errors will be detected by user space not
* seeing fence_rep::error filled in.
*/
ret = copy_to_user(user_fence_rep, &fence_rep, sizeof(fence_rep));
vmw_kms_cursor_post_execbuf(dev_priv);
ttm_read_unlock(&vmaster->lock);
return 0;
out_err:
vmw_free_relocations(sw_context);
ttm_eu_backoff_reservation(&sw_context->validate_nodes);
vmw_clear_validations(sw_context);
out_commit:
vmw_fifo_commit(dev_priv, 0);
out_unlock:
mutex_unlock(&dev_priv->cmdbuf_mutex);
out_no_cmd_mutex:
ttm_read_unlock(&vmaster->lock);
return ret;
}