0,0 → 1,320 |
/************************************************************************** |
* |
* 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); |
} |