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path: root/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
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Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c621
1 files changed, 621 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
new file mode 100644
index 000000000000..2e92da567403
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -0,0 +1,621 @@
+/**************************************************************************
+ *
+ * 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_cmd_dma(struct vmw_private *dev_priv,
+ struct vmw_sw_context *sw_context,
+ SVGA3dCmdHeader *header)
+{
+ uint32_t handle;
+ 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;
+ struct vmw_relocation *reloc;
+ int ret;
+ uint32_t cur_validate_node;
+ struct ttm_validate_buffer *val_buf;
+
+ cmd = container_of(header, struct vmw_dma_cmd, header);
+ handle = cmd->dma.guest.ptr.gmrId;
+ 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 of DMA commands per submission"
+ " exceeded\n");
+ ret = -EINVAL;
+ goto out_no_reloc;
+ }
+
+ reloc = &sw_context->relocs[sw_context->cur_reloc++];
+ reloc->location = &cmd->dma.guest.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;
+ }
+
+ 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_cid_check),
+ VMW_CMD_DEF(SVGA_3D_CMD_WAIT_FOR_QUERY, &vmw_cmd_cid_check),
+ 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;
+
+ ret = vmw_gmr_bind(dev_priv, bo);
+ if (likely(ret == 0 || ret == -ERESTARTSYS))
+ return ret;
+
+
+ ret = ttm_bo_validate(bo, &vmw_vram_placement, true, 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)) {
+ 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);
+ 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;
+}