/**
* vmw_dmabuf_pin_in_placement - Validate a buffer to placement.
*
* @dev_priv: Driver private.
* @buf: DMA buffer to move.
* @placement: The placement to pin it.
* @interruptible: Use interruptible wait.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
int vmw_dmabuf_pin_in_placement(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
struct ttm_placement *placement,
bool interruptible)
{
struct ttm_operation_ctx ctx = {interruptible, false };
struct ttm_buffer_object *bo = &buf->base;
int ret;
uint32_t new_flags;
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, NULL);
if (unlikely(ret != 0))
goto err;
if (buf->pin_count > 0)
ret = ttm_bo_mem_compat(placement, &bo->mem,
&new_flags) == true ? 0 : -EINVAL;
else
ret = ttm_bo_validate(bo, placement, &ctx);
if (!ret)
vmw_bo_pin_reserved(buf, true);
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
/**
* vmw_dmabuf_pin_in_start_of_vram - Move a buffer to start of vram.
*
* This function takes the reservation_sem in write mode.
* Flushes and unpins the query bo to avoid failures.
*
* @dev_priv: Driver private.
* @buf: DMA buffer to pin.
* @interruptible: Use interruptible wait.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
int vmw_dmabuf_pin_in_start_of_vram(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool interruptible)
{
struct ttm_operation_ctx ctx = {interruptible, false };
struct ttm_buffer_object *bo = &buf->base;
struct ttm_placement placement;
struct ttm_place place;
int ret = 0;
uint32_t new_flags;
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;
vmw_execbuf_release_pinned_bo(dev_priv);
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
if (unlikely(ret != 0))
goto err_unlock;
/*
* Is this buffer already in vram but not at the start of it?
* In that case, evict it first because TTM isn't good at handling
* that situation.
*/
if (bo->mem.mem_type == TTM_PL_VRAM &&
bo->mem.start < bo->num_pages &&
bo->mem.start > 0 &&
buf->pin_count == 0) {
ctx.interruptible = false;
(void) ttm_bo_validate(bo, &vmw_sys_placement, &ctx);
}
if (buf->pin_count > 0)
ret = ttm_bo_mem_compat(&placement, &bo->mem,
&new_flags) == true ? 0 : -EINVAL;
else
ret = ttm_bo_validate(bo, &placement, &ctx);
/* For some reason we didn't end up at the start of vram */
WARN_ON(ret == 0 && bo->offset != 0);
if (!ret)
vmw_bo_pin_reserved(buf, true);
ttm_bo_unreserve(bo);
err_unlock:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
bool interruptible, bool no_wait_reserve,
bool no_wait_gpu)
{
int ret;
BUG_ON(!atomic_read(&bo->reserved));
/* Check that range is valid */
if (placement->lpfn || placement->fpfn)
if (placement->fpfn > placement->lpfn ||
(placement->lpfn - placement->fpfn) < bo->num_pages)
return -EINVAL;
/*
* Check whether we need to move buffer.
*/
ret = ttm_bo_mem_compat(placement, &bo->mem);
if (ret < 0) {
ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait_reserve, no_wait_gpu);
if (ret)
return ret;
} else {
/*
* Use the access and other non-mapping-related flag bits from
* the compatible memory placement flags to the active flags
*/
ttm_flag_masked(&bo->mem.placement, placement->placement[ret],
~TTM_PL_MASK_MEMTYPE);
}
/*
* We might need to add a TTM.
*/
if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
ret = ttm_bo_add_ttm(bo, true);
if (ret)
return ret;
}
return 0;
}
