/************************************************************************** * * 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); 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); BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type); }