| /************************************************************************** |
| * |
| * Copyright © 2011 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 <drm/ttm/ttm_placement.h> |
| |
| #include <drm/drmP.h> |
| #include "vmwgfx_drv.h" |
| |
| |
| /** |
| * vmw_dmabuf_to_placement - Validate a buffer to placement. |
| * |
| * @dev_priv: Driver private. |
| * @buf: DMA buffer to move. |
| * @pin: Pin buffer if true. |
| * @interruptible: Use interruptible wait. |
| * |
| * 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. |
| */ |
| int vmw_dmabuf_to_placement(struct vmw_private *dev_priv, |
| struct vmw_dma_buffer *buf, |
| struct ttm_placement *placement, |
| bool interruptible) |
| { |
| struct vmw_master *vmaster = dev_priv->active_master; |
| struct ttm_buffer_object *bo = &buf->base; |
| int ret; |
| |
| ret = ttm_write_lock(&vmaster->lock, interruptible); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| vmw_execbuf_release_pinned_bo(dev_priv); |
| |
| ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
| if (unlikely(ret != 0)) |
| goto err; |
| |
| ret = ttm_bo_validate(bo, placement, interruptible, false); |
| |
| ttm_bo_unreserve(bo); |
| |
| err: |
| ttm_write_unlock(&vmaster->lock); |
| return ret; |
| } |
| |
| /** |
| * vmw_dmabuf_to_vram_or_gmr - Move a buffer to vram or gmr. |
| * |
| * 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. |
| * @pin: Pin buffer if true. |
| * @interruptible: Use interruptible wait. |
| * |
| * Returns |
| * -ERESTARTSYS if interrupted by a signal. |
| */ |
| int vmw_dmabuf_to_vram_or_gmr(struct vmw_private *dev_priv, |
| struct vmw_dma_buffer *buf, |
| bool pin, bool interruptible) |
| { |
| struct vmw_master *vmaster = dev_priv->active_master; |
| struct ttm_buffer_object *bo = &buf->base; |
| struct ttm_placement *placement; |
| int ret; |
| |
| ret = ttm_write_lock(&vmaster->lock, interruptible); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| if (pin) |
| vmw_execbuf_release_pinned_bo(dev_priv); |
| |
| ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
| if (unlikely(ret != 0)) |
| goto err; |
| |
| /** |
| * 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, |
| * start evicting GMRs to make room. If the DMA buffer can't be |
| * used as a GMR, this will return -ENOMEM. |
| */ |
| |
| if (pin) |
| placement = &vmw_vram_gmr_ne_placement; |
| else |
| placement = &vmw_vram_gmr_placement; |
| |
| ret = ttm_bo_validate(bo, placement, interruptible, false); |
| if (likely(ret == 0) || ret == -ERESTARTSYS) |
| goto err_unreserve; |
| |
| |
| /** |
| * If that failed, try VRAM again, this time evicting |
| * previous contents. |
| */ |
| |
| if (pin) |
| placement = &vmw_vram_ne_placement; |
| else |
| placement = &vmw_vram_placement; |
| |
| ret = ttm_bo_validate(bo, placement, interruptible, false); |
| |
| err_unreserve: |
| ttm_bo_unreserve(bo); |
| err: |
| ttm_write_unlock(&vmaster->lock); |
| return ret; |
| } |
| |
| /** |
| * vmw_dmabuf_to_vram - Move a buffer to vram. |
| * |
| * 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. |
| * |
| * @dev_priv: Driver private. |
| * @buf: DMA buffer to move. |
| * @pin: Pin buffer in vram if true. |
| * @interruptible: Use interruptible wait. |
| * |
| * Returns |
| * -ERESTARTSYS if interrupted by a signal. |
| */ |
| int vmw_dmabuf_to_vram(struct vmw_private *dev_priv, |
| struct vmw_dma_buffer *buf, |
| bool pin, bool interruptible) |
| { |
| struct ttm_placement *placement; |
| |
| if (pin) |
| placement = &vmw_vram_ne_placement; |
| else |
| placement = &vmw_vram_placement; |
| |
| return vmw_dmabuf_to_placement(dev_priv, buf, |
| placement, |
| interruptible); |
| } |
| |
| /** |
| * vmw_dmabuf_to_start_of_vram - Move a buffer to start of vram. |
| * |
| * 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. |
| * @pin: Pin buffer in vram if true. |
| * @interruptible: Use interruptible wait. |
| * |
| * Returns |
| * -ERESTARTSYS if interrupted by a signal. |
| */ |
| int vmw_dmabuf_to_start_of_vram(struct vmw_private *dev_priv, |
| struct vmw_dma_buffer *buf, |
| bool pin, bool interruptible) |
| { |
| struct vmw_master *vmaster = dev_priv->active_master; |
| struct ttm_buffer_object *bo = &buf->base; |
| struct ttm_placement placement; |
| int ret = 0; |
| |
| if (pin) |
| placement = vmw_vram_ne_placement; |
| else |
| placement = vmw_vram_placement; |
| placement.lpfn = bo->num_pages; |
| |
| ret = ttm_write_lock(&vmaster->lock, interruptible); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| if (pin) |
| vmw_execbuf_release_pinned_bo(dev_priv); |
| ret = ttm_bo_reserve(bo, interruptible, false, false, 0); |
| if (unlikely(ret != 0)) |
| goto err_unlock; |
| |
| /* Is this buffer already in vram but not at the start of it? */ |
| if (bo->mem.mem_type == TTM_PL_VRAM && |
| bo->mem.start < bo->num_pages && |
| bo->mem.start > 0) |
| (void) ttm_bo_validate(bo, &vmw_sys_placement, false, false); |
| |
| ret = ttm_bo_validate(bo, &placement, interruptible, false); |
| |
| /* For some reason we didn't up at the start of vram */ |
| WARN_ON(ret == 0 && bo->offset != 0); |
| |
| ttm_bo_unreserve(bo); |
| err_unlock: |
| ttm_write_unlock(&vmaster->lock); |
| |
| return ret; |
| } |
| |
| |
| /** |
| * vmw_dmabuf_upin - Unpin the buffer given buffer, does not move the buffer. |
| * |
| * 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. |
| * |
| * @dev_priv: Driver private. |
| * @buf: DMA buffer to unpin. |
| * @interruptible: Use interruptible wait. |
| * |
| * Returns |
| * -ERESTARTSYS if interrupted by a signal. |
| */ |
| int vmw_dmabuf_unpin(struct vmw_private *dev_priv, |
| struct vmw_dma_buffer *buf, |
| bool interruptible) |
| { |
| /* |
| * We could in theory early out if the buffer is |
| * unpinned but we need to lock and reserve the buffer |
| * anyways so we don't gain much by that. |
| */ |
| return vmw_dmabuf_to_placement(dev_priv, buf, |
| &vmw_evictable_placement, |
| interruptible); |
| } |
| |
| |
| /** |
| * vmw_bo_get_guest_ptr - Get the guest ptr representing the current placement |
| * of a buffer. |
| * |
| * @bo: Pointer to a struct ttm_buffer_object. Must be pinned or reserved. |
| * @ptr: SVGAGuestPtr returning the result. |
| */ |
| void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *bo, |
| SVGAGuestPtr *ptr) |
| { |
| if (bo->mem.mem_type == TTM_PL_VRAM) { |
| ptr->gmrId = SVGA_GMR_FRAMEBUFFER; |
| ptr->offset = bo->offset; |
| } else { |
| ptr->gmrId = bo->mem.start; |
| 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; |
| |
| lockdep_assert_held(&bo->resv->lock.base); |
| BUG_ON(old_mem_type != TTM_PL_VRAM && |
| old_mem_type != VMW_PL_GMR && |
| old_mem_type != VMW_PL_MOB); |
| |
| pl_flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB |
| | 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); |
| |
| BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); |
| } |