diff options
Diffstat (limited to 'drivers/gpu/drm/vmwgfx')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c | 44 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 86 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 24 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 375 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c | 57 | ||||
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 8 |
6 files changed, 572 insertions, 22 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c index 7f744a82892a..3fa884db08ab 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c @@ -42,6 +42,7 @@ * May only be called by the current master since it assumes that the * master lock is the current master's lock. * This function takes the master's lock in write mode. + * Flushes and unpins the query bo to avoid failures. * * Returns * -ERESTARTSYS if interrupted by a signal. @@ -59,6 +60,8 @@ int vmw_dmabuf_to_placement(struct vmw_private *dev_priv, if (unlikely(ret != 0)) return ret; + vmw_execbuf_release_pinned_bo(dev_priv, false, 0); + ret = ttm_bo_reserve(bo, interruptible, false, false, 0); if (unlikely(ret != 0)) goto err; @@ -78,6 +81,7 @@ err: * May only be called by the current master since it assumes that the * master lock is the current master's lock. * This function takes the master's lock in write mode. + * Flushes and unpins the query bo if @pin == true to avoid failures. * * @dev_priv: Driver private. * @buf: DMA buffer to move. @@ -100,6 +104,9 @@ int vmw_dmabuf_to_vram_or_gmr(struct vmw_private *dev_priv, if (unlikely(ret != 0)) return ret; + if (pin) + vmw_execbuf_release_pinned_bo(dev_priv, false, 0); + ret = ttm_bo_reserve(bo, interruptible, false, false, 0); if (unlikely(ret != 0)) goto err; @@ -177,6 +184,7 @@ int vmw_dmabuf_to_vram(struct vmw_private *dev_priv, * May only be called by the current master since it assumes that the * master lock is the current master's lock. * This function takes the master's lock in write mode. + * Flushes and unpins the query bo if @pin == true to avoid failures. * * @dev_priv: Driver private. * @buf: DMA buffer to move. @@ -205,6 +213,9 @@ int vmw_dmabuf_to_start_of_vram(struct vmw_private *dev_priv, if (unlikely(ret != 0)) return ret; + if (pin) + vmw_execbuf_release_pinned_bo(dev_priv, false, 0); + ret = ttm_bo_reserve(bo, interruptible, false, false, 0); if (unlikely(ret != 0)) goto err_unlock; @@ -276,3 +287,36 @@ void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo, ptr->offset = 0; } } + + +/** + * vmw_bo_pin - Pin or unpin a buffer object without moving it. + * + * @bo: The buffer object. Must be reserved, and present either in VRAM + * or GMR memory. + * @pin: Whether to pin or unpin. + * + */ +void vmw_bo_pin(struct ttm_buffer_object *bo, bool pin) +{ + uint32_t pl_flags; + struct ttm_placement placement; + uint32_t old_mem_type = bo->mem.mem_type; + int ret; + + BUG_ON(!atomic_read(&bo->reserved)); + BUG_ON(old_mem_type != TTM_PL_VRAM && + old_mem_type != VMW_PL_FLAG_GMR); + + pl_flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED; + if (pin) + pl_flags |= TTM_PL_FLAG_NO_EVICT; + + memset(&placement, 0, sizeof(placement)); + placement.num_placement = 1; + placement.placement = &pl_flags; + + ret = ttm_bo_validate(bo, &placement, false, true, true); + + BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); +} diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index ace4402214c6..7b88104144ca 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -213,6 +213,72 @@ static void vmw_print_capabilities(uint32_t capabilities) DRM_INFO(" Screen Object 2.\n"); } + +/** + * vmw_execbuf_prepare_dummy_query - Initialize a query result structure at + * the start of a buffer object. + * + * @dev_priv: The device private structure. + * + * This function will idle the buffer using an uninterruptible wait, then + * map the first page and initialize a pending occlusion query result structure, + * Finally it will unmap the buffer. + * + * TODO: Since we're only mapping a single page, we should optimize the map + * to use kmap_atomic / iomap_atomic. + */ +static void vmw_dummy_query_bo_prepare(struct vmw_private *dev_priv) +{ + struct ttm_bo_kmap_obj map; + volatile SVGA3dQueryResult *result; + bool dummy; + int ret; + struct ttm_bo_device *bdev = &dev_priv->bdev; + struct ttm_buffer_object *bo = dev_priv->dummy_query_bo; + + ttm_bo_reserve(bo, false, false, false, 0); + spin_lock(&bdev->fence_lock); + ret = ttm_bo_wait(bo, false, false, false, TTM_USAGE_READWRITE); + spin_unlock(&bdev->fence_lock); + if (unlikely(ret != 0)) + (void) vmw_fallback_wait(dev_priv, false, true, 0, false, + 10*HZ); + + ret = ttm_bo_kmap(bo, 0, 1, &map); + if (likely(ret == 0)) { + result = ttm_kmap_obj_virtual(&map, &dummy); + result->totalSize = sizeof(*result); + result->state = SVGA3D_QUERYSTATE_PENDING; + result->result32 = 0xff; + ttm_bo_kunmap(&map); + } else + DRM_ERROR("Dummy query buffer map failed.\n"); + ttm_bo_unreserve(bo); +} + + +/** + * vmw_dummy_query_bo_create - create a bo to hold a dummy query result + * + * @dev_priv: A device private structure. + * + * This function creates a small buffer object that holds the query + * result for dummy queries emitted as query barriers. + * No interruptible waits are done within this function. + * + * Returns an error if bo creation fails. + */ +static int vmw_dummy_query_bo_create(struct vmw_private *dev_priv) +{ + return ttm_bo_create(&dev_priv->bdev, + PAGE_SIZE, + ttm_bo_type_device, + &vmw_vram_sys_placement, + 0, 0, false, NULL, + &dev_priv->dummy_query_bo); +} + + static int vmw_request_device(struct vmw_private *dev_priv) { int ret; @@ -223,12 +289,29 @@ static int vmw_request_device(struct vmw_private *dev_priv) return ret; } vmw_fence_fifo_up(dev_priv->fman); + ret = vmw_dummy_query_bo_create(dev_priv); + if (unlikely(ret != 0)) + goto out_no_query_bo; + vmw_dummy_query_bo_prepare(dev_priv); return 0; + +out_no_query_bo: + vmw_fence_fifo_down(dev_priv->fman); + vmw_fifo_release(dev_priv, &dev_priv->fifo); + return ret; } static void vmw_release_device(struct vmw_private *dev_priv) { + /* + * Previous destructions should've released + * the pinned bo. + */ + + BUG_ON(dev_priv->pinned_bo != NULL); + + ttm_bo_unref(&dev_priv->dummy_query_bo); vmw_fence_fifo_down(dev_priv->fman); vmw_fifo_release(dev_priv, &dev_priv->fifo); } @@ -794,6 +877,8 @@ static void vmw_master_drop(struct drm_device *dev, vmw_fp->locked_master = drm_master_get(file_priv->master); ret = ttm_vt_lock(&vmaster->lock, false, vmw_fp->tfile); + vmw_execbuf_release_pinned_bo(dev_priv, false, 0); + if (unlikely((ret != 0))) { DRM_ERROR("Unable to lock TTM at VT switch.\n"); drm_master_put(&vmw_fp->locked_master); @@ -844,6 +929,7 @@ static int vmwgfx_pm_notifier(struct notifier_block *nb, unsigned long val, * This empties VRAM and unbinds all GMR bindings. * Buffer contents is moved to swappable memory. */ + vmw_execbuf_release_pinned_bo(dev_priv, false, 0); ttm_bo_swapout_all(&dev_priv->bdev); break; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index b22b96a491a4..d8d6a8659119 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -82,6 +82,7 @@ struct vmw_resource { void (*hw_destroy) (struct vmw_resource *res); void (*res_free) (struct vmw_resource *res); bool on_validate_list; + struct list_head query_head; /* Protected by the cmdbuf mutex */ /* TODO is a generic snooper needed? */ #if 0 void (*snoop)(struct vmw_resource *res, @@ -142,6 +143,7 @@ struct vmw_sw_context{ uint32_t last_cid; bool cid_valid; bool kernel; /**< is the called made from the kernel */ + struct vmw_resource *cur_ctx; uint32_t last_sid; uint32_t sid_translation; bool sid_valid; @@ -155,6 +157,11 @@ struct vmw_sw_context{ uint32_t cmd_bounce_size; struct vmw_resource *resources[VMWGFX_MAX_VALIDATIONS]; uint32_t num_ref_resources; + uint32_t fence_flags; + struct list_head query_list; + struct ttm_buffer_object *cur_query_bo; + uint32_t cur_query_cid; + bool query_cid_valid; }; struct vmw_legacy_display; @@ -294,6 +301,16 @@ struct vmw_private { struct mutex release_mutex; uint32_t num_3d_resources; + + /* + * Query processing. These members + * are protected by the cmdbuf mutex. + */ + + struct ttm_buffer_object *dummy_query_bo; + struct ttm_buffer_object *pinned_bo; + uint32_t query_cid; + bool dummy_query_bo_pinned; }; static inline struct vmw_private *vmw_priv(struct drm_device *dev) @@ -418,6 +435,7 @@ extern int vmw_dmabuf_unpin(struct vmw_private *vmw_priv, bool interruptible); extern void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *buf, SVGAGuestPtr *ptr); +extern void vmw_bo_pin(struct ttm_buffer_object *bo, bool pin); /** * Misc Ioctl functionality - vmwgfx_ioctl.c @@ -447,6 +465,8 @@ extern int vmw_fifo_send_fence(struct vmw_private *dev_priv, extern void vmw_fifo_ping_host(struct vmw_private *dev_priv, uint32_t reason); extern bool vmw_fifo_have_3d(struct vmw_private *dev_priv); extern bool vmw_fifo_have_pitchlock(struct vmw_private *dev_priv); +extern int vmw_fifo_emit_dummy_query(struct vmw_private *dev_priv, + uint32_t cid); /** * TTM glue - vmwgfx_ttm_glue.c @@ -485,6 +505,10 @@ extern int vmw_execbuf_process(struct drm_file *file_priv, struct drm_vmw_fence_rep __user *user_fence_rep); +extern void +vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv, + bool only_on_cid_match, uint32_t cid); + /** * IRQs and wating - vmwgfx_irq.c */ diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index dea0474f6f3b..efa1d1cc0414 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -44,7 +44,6 @@ static int vmw_cmd_ok(struct vmw_private *dev_priv, return 0; } - static int vmw_resource_to_validate_list(struct vmw_sw_context *sw_context, struct vmw_resource **p_res) { @@ -68,6 +67,54 @@ out: return ret; } +/** + * vmw_bo_to_validate_list - add a bo to a validate list + * + * @sw_context: The software context used for this command submission batch. + * @bo: The buffer object to add. + * @fence_flags: Fence flags to be or'ed with any other fence flags for + * this buffer on this submission batch. + * @p_val_node: If non-NULL Will be updated with the validate node number + * on return. + * + * Returns -EINVAL if the limit of number of buffer objects per command + * submission is reached. + */ +static int vmw_bo_to_validate_list(struct vmw_sw_context *sw_context, + struct ttm_buffer_object *bo, + uint32_t fence_flags, + uint32_t *p_val_node) +{ + uint32_t val_node; + struct ttm_validate_buffer *val_buf; + + val_node = vmw_dmabuf_validate_node(bo, sw_context->cur_val_buf); + + if (unlikely(val_node >= VMWGFX_MAX_VALIDATIONS)) { + DRM_ERROR("Max number of DMA buffers per submission" + " exceeded.\n"); + return -EINVAL; + } + + val_buf = &sw_context->val_bufs[val_node]; + if (unlikely(val_node == sw_context->cur_val_buf)) { + val_buf->new_sync_obj_arg = NULL; + val_buf->bo = ttm_bo_reference(bo); + val_buf->usage = TTM_USAGE_READWRITE; + list_add_tail(&val_buf->head, &sw_context->validate_nodes); + ++sw_context->cur_val_buf; + } + + val_buf->new_sync_obj_arg = (void *) + ((unsigned long) val_buf->new_sync_obj_arg | fence_flags); + sw_context->fence_flags |= fence_flags; + + if (p_val_node) + *p_val_node = val_node; + + return 0; +} + static int vmw_cmd_cid_check(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGA3dCmdHeader *header) @@ -94,6 +141,7 @@ static int vmw_cmd_cid_check(struct vmw_private *dev_priv, sw_context->last_cid = cmd->cid; sw_context->cid_valid = true; + sw_context->cur_ctx = ctx; return vmw_resource_to_validate_list(sw_context, &ctx); } @@ -114,7 +162,8 @@ static int vmw_cmd_sid_check(struct vmw_private *dev_priv, return 0; } - ret = vmw_user_surface_lookup_handle(dev_priv, sw_context->tfile, + ret = vmw_user_surface_lookup_handle(dev_priv, + sw_context->tfile, *sid, &srf); if (unlikely(ret != 0)) { DRM_ERROR("Could ot find or use surface 0x%08x " @@ -225,6 +274,168 @@ static int vmw_cmd_present_check(struct vmw_private *dev_priv, return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.sid); } +/** + * vmw_query_bo_switch_prepare - Prepare to switch pinned buffer for queries. + * + * @dev_priv: The device private structure. + * @cid: The hardware context for the next query. + * @new_query_bo: The new buffer holding query results. + * @sw_context: The software context used for this command submission. + * + * This function checks whether @new_query_bo is suitable for holding + * query results, and if another buffer currently is pinned for query + * results. If so, the function prepares the state of @sw_context for + * switching pinned buffers after successful submission of the current + * command batch. It also checks whether we're using a new query context. + * In that case, it makes sure we emit a query barrier for the old + * context before the current query buffer is fenced. + */ +static int vmw_query_bo_switch_prepare(struct vmw_private *dev_priv, + uint32_t cid, + struct ttm_buffer_object *new_query_bo, + struct vmw_sw_context *sw_context) +{ + int ret; + bool add_cid = false; + uint32_t cid_to_add; + + if (unlikely(new_query_bo != sw_context->cur_query_bo)) { + + if (unlikely(new_query_bo->num_pages > 4)) { + DRM_ERROR("Query buffer too large.\n"); + return -EINVAL; + } + + if (unlikely(sw_context->cur_query_bo != NULL)) { + BUG_ON(!sw_context->query_cid_valid); + add_cid = true; + cid_to_add = sw_context->cur_query_cid; + ret = vmw_bo_to_validate_list(sw_context, + sw_context->cur_query_bo, + DRM_VMW_FENCE_FLAG_EXEC, + NULL); + if (unlikely(ret != 0)) + return ret; + } + sw_context->cur_query_bo = new_query_bo; + + ret = vmw_bo_to_validate_list(sw_context, + dev_priv->dummy_query_bo, + DRM_VMW_FENCE_FLAG_EXEC, + NULL); + if (unlikely(ret != 0)) + return ret; + + } + + if (unlikely(cid != sw_context->cur_query_cid && + sw_context->query_cid_valid)) { + add_cid = true; + cid_to_add = sw_context->cur_query_cid; + } + + sw_context->cur_query_cid = cid; + sw_context->query_cid_valid = true; + + if (add_cid) { + struct vmw_resource *ctx = sw_context->cur_ctx; + + if (list_empty(&ctx->query_head)) + list_add_tail(&ctx->query_head, + &sw_context->query_list); + ret = vmw_bo_to_validate_list(sw_context, + dev_priv->dummy_query_bo, + DRM_VMW_FENCE_FLAG_EXEC, + NULL); + if (unlikely(ret != 0)) + return ret; + } + return 0; +} + + +/** + * vmw_query_bo_switch_commit - Finalize switching pinned query buffer + * + * @dev_priv: The device private structure. + * @sw_context: The software context used for this command submission batch. + * + * This function will check if we're switching query buffers, and will then, + * if no other query waits are issued this command submission batch, + * issue a dummy occlusion query wait used as a query barrier. When the fence + * object following that query wait has signaled, we are sure that all + * preseding queries have finished, and the old query buffer can be unpinned. + * However, since both the new query buffer and the old one are fenced with + * that fence, we can do an asynchronus unpin now, and be sure that the + * old query buffer won't be moved until the fence has signaled. + * + * As mentioned above, both the new - and old query buffers need to be fenced + * using a sequence emitted *after* calling this function. + */ +static void vmw_query_bo_switch_commit(struct vmw_private *dev_priv, + struct vmw_sw_context *sw_context) +{ + + struct vmw_resource *ctx, *next_ctx; + int ret; + + /* + * The validate list should still hold references to all + * contexts here. + */ + + list_for_each_entry_safe(ctx, next_ctx, &sw_context->query_list, + query_head) { + list_del_init(&ctx->query_head); + + BUG_ON(!ctx->on_validate_list); + + ret = vmw_fifo_emit_dummy_query(dev_priv, ctx->id); + + if (unlikely(ret != 0)) + DRM_ERROR("Out of fifo space for dummy query.\n"); + } + + if (dev_priv->pinned_bo != sw_context->cur_query_bo) { + if (dev_priv->pinned_bo) { + vmw_bo_pin(dev_priv->pinned_bo, false); + ttm_bo_unref(&dev_priv->pinned_bo); + } + + vmw_bo_pin(sw_context->cur_query_bo, true); + + /* + * We pin also the dummy_query_bo buffer so that we + * don't need to validate it when emitting + * dummy queries in context destroy paths. + */ + + vmw_bo_pin(dev_priv->dummy_query_bo, true); + dev_priv->dummy_query_bo_pinned = true; + + dev_priv->query_cid = sw_context->cur_query_cid; + dev_priv->pinned_bo = + ttm_bo_reference(sw_context->cur_query_bo); + } +} + +/** + * vmw_query_switch_backoff - clear query barrier list + * @sw_context: The sw context used for this submission batch. + * + * This function is used as part of an error path, where a previously + * set up list of query barriers needs to be cleared. + * + */ +static void vmw_query_switch_backoff(struct vmw_sw_context *sw_context) +{ + struct list_head *list, *next; + + list_for_each_safe(list, next, &sw_context->query_list) { + list_del_init(list); + } +} + static int vmw_translate_guest_ptr(struct vmw_private *dev_priv, struct vmw_sw_context *sw_context, SVGAGuestPtr *ptr, @@ -234,8 +445,6 @@ static int vmw_translate_guest_ptr(struct vmw_private *dev_priv, 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); @@ -255,23 +464,11 @@ static int vmw_translate_guest_ptr(struct vmw_private *dev_priv, 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_VALIDATIONS)) { - DRM_ERROR("Max number of DMA buffers per submission" - " exceeded.\n"); - ret = -EINVAL; + ret = vmw_bo_to_validate_list(sw_context, bo, DRM_VMW_FENCE_FLAG_EXEC, + &reloc->index); + if (unlikely(ret != 0)) 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->usage = TTM_USAGE_READWRITE; - val_buf->new_sync_obj_arg = (void *) DRM_VMW_FENCE_FLAG_EXEC; - list_add_tail(&val_buf->head, &sw_context->validate_nodes); - ++sw_context->cur_val_buf; - } *vmw_bo_p = vmw_bo; return 0; @@ -303,8 +500,11 @@ static int vmw_cmd_end_query(struct vmw_private *dev_priv, if (unlikely(ret != 0)) return ret; + ret = vmw_query_bo_switch_prepare(dev_priv, cmd->q.cid, + &vmw_bo->base, sw_context); + vmw_dmabuf_unreference(&vmw_bo); - return 0; + return ret; } static int vmw_cmd_wait_query(struct vmw_private *dev_priv, @@ -317,6 +517,7 @@ static int vmw_cmd_wait_query(struct vmw_private *dev_priv, SVGA3dCmdWaitForQuery q; } *cmd; int ret; + struct vmw_resource *ctx; cmd = container_of(header, struct vmw_query_cmd, header); ret = vmw_cmd_cid_check(dev_priv, sw_context, header); @@ -330,6 +531,16 @@ static int vmw_cmd_wait_query(struct vmw_private *dev_priv, return ret; vmw_dmabuf_unreference(&vmw_bo); + + /* + * This wait will act as a barrier for previous waits for this + * context. + */ + + ctx = sw_context->cur_ctx; + if (!list_empty(&ctx->query_head)) + list_del_init(&ctx->query_head); + return 0; } @@ -687,6 +898,16 @@ static int vmw_validate_single_buffer(struct vmw_private *dev_priv, { int ret; + + /* + * Don't validate pinned buffers. + */ + + if (bo == dev_priv->pinned_bo || + (bo == dev_priv->dummy_query_bo && + dev_priv->dummy_query_bo_pinned)) + return 0; + /** * Put BO in VRAM if there is space, otherwise as a GMR. * If there is no space in VRAM and GMR ids are all used up, @@ -846,6 +1067,11 @@ int vmw_execbuf_process(struct drm_file *file_priv, sw_context->cur_reloc = 0; sw_context->cur_val_buf = 0; sw_context->num_ref_resources = 0; + sw_context->fence_flags = 0; + INIT_LIST_HEAD(&sw_context->query_list); + sw_context->cur_query_bo = dev_priv->pinned_bo; + sw_context->cur_query_cid = dev_priv->query_cid; + sw_context->query_cid_valid = (dev_priv->pinned_bo != NULL); INIT_LIST_HEAD(&sw_context->validate_nodes); @@ -882,6 +1108,7 @@ int vmw_execbuf_process(struct drm_file *file_priv, memcpy(cmd, kernel_commands, command_size); vmw_fifo_commit(dev_priv, command_size); + vmw_query_bo_switch_commit(dev_priv, sw_context); ret = vmw_execbuf_fence_commands(file_priv, dev_priv, &fence, (user_fence_rep) ? &handle : NULL); @@ -940,6 +1167,7 @@ int vmw_execbuf_process(struct drm_file *file_priv, out_err: vmw_free_relocations(sw_context); out_throttle: + vmw_query_switch_backoff(sw_context); ttm_eu_backoff_reservation(&sw_context->validate_nodes); vmw_clear_validations(sw_context); out_unlock: @@ -947,6 +1175,113 @@ out_unlock: return ret; } +/** + * vmw_execbuf_unpin_panic - Idle the fifo and unpin the query buffer. + * + * @dev_priv: The device private structure. + * + * This function is called to idle the fifo and unpin the query buffer + * if the normal way to do this hits an error, which should typically be + * extremely rare. + */ +static void vmw_execbuf_unpin_panic(struct vmw_private *dev_priv) +{ + DRM_ERROR("Can't unpin query buffer. Trying to recover.\n"); + + (void) vmw_fallback_wait(dev_priv, false, true, 0, false, 10*HZ); + vmw_bo_pin(dev_priv->pinned_bo, false); + vmw_bo_pin(dev_priv->dummy_query_bo, false); + dev_priv->dummy_query_bo_pinned = false; +} + + +/** + * vmw_execbuf_release_pinned_bo - Flush queries and unpin the pinned + * query bo. + * + * @dev_priv: The device private structure. + * @only_on_cid_match: Only flush and unpin if the current active query cid + * matches @cid. + * @cid: Optional context id to match. + * + * This function should be used to unpin the pinned query bo, or + * as a query barrier when we need to make sure that all queries have + * finished before the next fifo command. (For example on hardware + * context destructions where the hardware may otherwise leak unfinished + * queries). + * + * This function does not return any failure codes, but make attempts + * to do safe unpinning in case of errors. + * + * The function will synchronize on the previous query barrier, and will + * thus not finish until that barrier has executed. + */ +void vmw_execbuf_release_pinned_bo(struct vmw_private *dev_priv, + bool only_on_cid_match, uint32_t cid) +{ + int ret = 0; + struct list_head validate_list; + struct ttm_validate_buffer pinned_val, query_val; + struct vmw_fence_obj *fence; + + mutex_lock(&dev_priv->cmdbuf_mutex); + + if (dev_priv->pinned_bo == NULL) + goto out_unlock; + + if (only_on_cid_match && cid != dev_priv->query_cid) + goto out_unlock; + + INIT_LIST_HEAD(&validate_list); + + pinned_val.new_sync_obj_arg = (void *)(unsigned long) + DRM_VMW_FENCE_FLAG_EXEC; + pinned_val.bo = ttm_bo_reference(dev_priv->pinned_bo); + list_add_tail(&pinned_val.head, &validate_list); + + query_val.new_sync_obj_arg = pinned_val.new_sync_obj_arg; + query_val.bo = ttm_bo_reference(dev_priv->dummy_query_bo); + list_add_tail(&query_val.head, &validate_list); + + do { + ret = ttm_eu_reserve_buffers(&validate_list); + } while (ret == -ERESTARTSYS); + + if (unlikely(ret != 0)) { + vmw_execbuf_unpin_panic(dev_priv); + goto out_no_reserve; + } + + ret = vmw_fifo_emit_dummy_query(dev_priv, dev_priv->query_cid); + if (unlikely(ret != 0)) { + vmw_execbuf_unpin_panic(dev_priv); + goto out_no_emit; + } + + vmw_bo_pin(dev_priv->pinned_bo, false); + vmw_bo_pin(dev_priv->dummy_query_bo, false); + dev_priv->dummy_query_bo_pinned = false; + + (void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); + ttm_eu_fence_buffer_objects(&validate_list, (void *) fence); + + ttm_bo_unref(&query_val.bo); + ttm_bo_unref(&pinned_val.bo); + ttm_bo_unref(&dev_priv->pinned_bo); + +out_unlock: + mutex_unlock(&dev_priv->cmdbuf_mutex); + return; + +out_no_emit: + ttm_eu_backoff_reservation(&validate_list); +out_no_reserve: + ttm_bo_unref(&query_val.bo); + ttm_bo_unref(&pinned_val.bo); + ttm_bo_unref(&dev_priv->pinned_bo); + mutex_unlock(&dev_priv->cmdbuf_mutex); +} + int vmw_execbuf_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c index d7ed33e732a0..62d6377b8ee8 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fifo.c @@ -505,3 +505,60 @@ int vmw_fifo_send_fence(struct vmw_private *dev_priv, uint32_t *seqno) out_err: return ret; } + +/** + * vmw_fifo_emit_dummy_query - emits a dummy query to the fifo. + * + * @dev_priv: The device private structure. + * @cid: The hardware context id used for the query. + * + * This function is used to emit a dummy occlusion query with + * no primitives rendered between query begin and query end. + * It's used to provide a query barrier, in order to know that when + * this query is finished, all preceding queries are also finished. + * + * A Query results structure should have been initialized at the start + * of the dev_priv->dummy_query_bo buffer object. And that buffer object + * must also be either reserved or pinned when this function is called. + * + * Returns -ENOMEM on failure to reserve fifo space. + */ +int vmw_fifo_emit_dummy_query(struct vmw_private *dev_priv, + uint32_t cid) +{ + /* + * A query wait without a preceding query end will + * actually finish all queries for this cid + * without writing to the query result structure. + */ + + struct ttm_buffer_object *bo = dev_priv->dummy_query_bo; + struct { + SVGA3dCmdHeader header; + SVGA3dCmdWaitForQuery body; + } *cmd; + + cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); + + if (unlikely(cmd == NULL)) { + DRM_ERROR("Out of fifo space for dummy query.\n"); + return -ENOMEM; + } + + cmd->header.id = SVGA_3D_CMD_WAIT_FOR_QUERY; + cmd->header.size = sizeof(cmd->body); + cmd->body.cid = cid; + cmd->body.type = SVGA3D_QUERYTYPE_OCCLUSION; + + if (bo->mem.mem_type == TTM_PL_VRAM) { + cmd->body.guestResult.gmrId = SVGA_GMR_FRAMEBUFFER; + cmd->body.guestResult.offset = bo->offset; + } else { + cmd->body.guestResult.gmrId = bo->mem.start; + cmd->body.guestResult.offset = 0; + } + + vmw_fifo_commit(dev_priv, sizeof(*cmd)); + + return 0; +} diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c index c1b6ffd4ce7b..36c9d033220a 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c @@ -126,7 +126,7 @@ static int vmw_resource_init(struct vmw_private *dev_priv, res->idr = idr; res->avail = false; res->dev_priv = dev_priv; - + INIT_LIST_HEAD(&res->query_head); do { if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) return -ENOMEM; @@ -194,8 +194,12 @@ static void vmw_hw_context_destroy(struct vmw_resource *res) struct { SVGA3dCmdHeader header; SVGA3dCmdDestroyContext body; - } *cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); + } *cmd; + + vmw_execbuf_release_pinned_bo(dev_priv, true, res->id); + + cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd)); if (unlikely(cmd == NULL)) { DRM_ERROR("Failed reserving FIFO space for surface " "destruction.\n"); |
