--- /dev/null
+/**************************************************************************
+ *
+ * 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 ttm_buffer_object *bo = &buf->base;
+ int ret;
+
+ ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
+ if (unlikely(ret != 0))
+ return ret;
+
+ vmw_execbuf_release_pinned_bo(dev_priv);
+
+ ret = ttm_bo_reserve(bo, interruptible, false, false, NULL);
+ if (unlikely(ret != 0))
+ goto err;
+
+ ret = ttm_bo_validate(bo, placement, interruptible, false);
+
+ ttm_bo_unreserve(bo);
+
+err:
+ ttm_write_unlock(&dev_priv->reservation_sem);
+ 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 ttm_buffer_object *bo = &buf->base;
+ struct ttm_placement *placement;
+ int ret;
+
+ ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
+ if (unlikely(ret != 0))
+ return ret;
+
+ if (pin)
+ vmw_execbuf_release_pinned_bo(dev_priv);
+
+ ret = ttm_bo_reserve(bo, interruptible, false, false, NULL);
+ 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(&dev_priv->reservation_sem);
+ 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 ttm_buffer_object *bo = &buf->base;
+ struct ttm_placement placement;
+ struct ttm_place place;
+ int ret = 0;
+
+ if (pin)
+ place = vmw_vram_ne_placement.placement[0];
+ else
+ place = vmw_vram_placement.placement[0];
+ place.lpfn = bo->num_pages;
+
+ placement.num_placement = 1;
+ placement.placement = &place;
+ placement.num_busy_placement = 1;
+ placement.busy_placement = &place;
+
+ ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
+ if (unlikely(ret != 0))
+ return ret;
+
+ if (pin)
+ vmw_execbuf_release_pinned_bo(dev_priv);
+ ret = ttm_bo_reserve(bo, interruptible, false, false, NULL);
+ 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(&dev_priv->reservation_sem);
+
+ 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.
+ * @pin: Whether to pin or unpin.
+ *
+ */
+void vmw_bo_pin(struct ttm_buffer_object *bo, bool pin)
+{
+ struct ttm_place pl;
+ struct ttm_placement placement;
+ uint32_t old_mem_type = bo->mem.mem_type;
+ int ret;
+
+ lockdep_assert_held(&bo->resv->lock.base);
+
+ pl.fpfn = 0;
+ pl.lpfn = 0;
+ pl.flags = TTM_PL_FLAG_VRAM | VMW_PL_FLAG_GMR | VMW_PL_FLAG_MOB
+ | TTM_PL_FLAG_SYSTEM | 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;
+
+ ret = ttm_bo_validate(bo, &placement, false, true);
+
+ BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type);
+}
Code Review / kvmfornfv.git / blobdiff