Release 4.17 drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c
/**************************************************************************
*
* Copyright © 2011-2015 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_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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 107 | 60.80% | 1 | 14.29% |
| Sinclair Yeh | 34 | 19.32% | 1 | 14.29% |
| Thomas Hellstrom | 22 | 12.50% | 3 | 42.86% |
| Christian König | 12 | 6.82% | 1 | 14.29% |
| Thierry Reding | 1 | 0.57% | 1 | 14.29% |
| Total | 176 | 100.00% | 7 | 100.00% |
/**
* vmw_dmabuf_pin_in_vram_or_gmr - Move a buffer to vram or gmr.
*
* 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 move.
* @pin: Pin buffer if true.
* @interruptible: Use interruptible wait.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
int vmw_dmabuf_pin_in_vram_or_gmr(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;
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(&vmw_vram_gmr_placement, &bo->mem,
&new_flags) == true ? 0 : -EINVAL;
goto out_unreserve;
}
ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, &ctx);
if (likely(ret == 0) || ret == -ERESTARTSYS)
goto out_unreserve;
ret = ttm_bo_validate(bo, &vmw_vram_placement, &ctx);
out_unreserve:
if (!ret)
vmw_bo_pin_reserved(buf, true);
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 127 | 60.77% | 1 | 14.29% |
| Sinclair Yeh | 39 | 18.66% | 1 | 14.29% |
| Thomas Hellstrom | 28 | 13.40% | 3 | 42.86% |
| Christian König | 14 | 6.70% | 1 | 14.29% |
| Thierry Reding | 1 | 0.48% | 1 | 14.29% |
| Total | 209 | 100.00% | 7 | 100.00% |
/**
* vmw_dmabuf_pin_in_vram - Move a buffer to 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 move.
* @interruptible: Use interruptible wait.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
int vmw_dmabuf_pin_in_vram(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool interruptible)
{
return vmw_dmabuf_pin_in_placement(dev_priv, buf, &vmw_vram_placement,
interruptible);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 27 | 87.10% | 1 | 50.00% |
| Thomas Hellstrom | 4 | 12.90% | 1 | 50.00% |
| Total | 31 | 100.00% | 2 | 100.00% |
/**
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 172 | 57.91% | 1 | 12.50% |
| Christian König | 59 | 19.87% | 2 | 25.00% |
| Sinclair Yeh | 41 | 13.80% | 1 | 12.50% |
| Thomas Hellstrom | 24 | 8.08% | 3 | 37.50% |
| Thierry Reding | 1 | 0.34% | 1 | 12.50% |
| Total | 297 | 100.00% | 8 | 100.00% |
/**
* vmw_dmabuf_unpin - Unpin the buffer given buffer, does not move the buffer.
*
* This function takes the reservation_sem 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)
{
struct ttm_buffer_object *bo = &buf->base;
int ret;
ret = ttm_read_lock(&dev_priv->reservation_sem, interruptible);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
if (unlikely(ret != 0))
goto err;
vmw_bo_pin_reserved(buf, false);
ttm_bo_unreserve(bo);
err:
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 80 | 76.19% | 2 | 66.67% |
| Jakob Bornecrantz | 25 | 23.81% | 1 | 33.33% |
| Total | 105 | 100.00% | 3 | 100.00% |
/**
* 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;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 53 | 88.33% | 1 | 50.00% |
| Thomas Hellstrom | 7 | 11.67% | 1 | 50.00% |
| Total | 60 | 100.00% | 2 | 100.00% |
/**
* vmw_bo_pin_reserved - Pin or unpin a buffer object without moving it.
*
* @vbo: The buffer object. Must be reserved.
* @pin: Whether to pin or unpin.
*
*/
void vmw_bo_pin_reserved(struct vmw_dma_buffer *vbo, bool pin)
{
struct ttm_operation_ctx ctx = { false, true };
struct ttm_place pl;
struct ttm_placement placement;
struct ttm_buffer_object *bo = &vbo->base;
uint32_t old_mem_type = bo->mem.mem_type;
int ret;
lockdep_assert_held(&bo->resv->lock.base);
if (pin) {
if (vbo->pin_count++ > 0)
return;
} else {
WARN_ON(vbo->pin_count <= 0);
if (--vbo->pin_count > 0)
return;
}
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, &ctx);
BUG_ON(ret != 0 || bo->mem.mem_type != old_mem_type);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 151 | 78.24% | 4 | 57.14% |
| Christian König | 34 | 17.62% | 2 | 28.57% |
| Maarten Lankhorst | 8 | 4.15% | 1 | 14.29% |
| Total | 193 | 100.00% | 7 | 100.00% |
/*
* vmw_dma_buffer_unmap - Tear down a cached buffer object map.
*
* @vbo: The buffer object whose map we are tearing down.
*
* This function tears down a cached map set up using
* vmw_dma_buffer_map_and_cache().
*/
void vmw_dma_buffer_unmap(struct vmw_dma_buffer *vbo)
{
if (vbo->map.bo == NULL)
return;
ttm_bo_kunmap(&vbo->map);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
/*
* vmw_dma_buffer_map_and_cache - Map a buffer object and cache the map
*
* @vbo: The buffer object to map
* Return: A kernel virtual address or NULL if mapping failed.
*
* This function maps a buffer object into the kernel address space, or
* returns the virtual kernel address of an already existing map. The virtual
* address remains valid as long as the buffer object is pinned or reserved.
* The cached map is torn down on either
* 1) Buffer object move
* 2) Buffer object swapout
* 3) Buffer object destruction
*
*/
void *vmw_dma_buffer_map_and_cache(struct vmw_dma_buffer *vbo)
{
struct ttm_buffer_object *bo = &vbo->base;
bool not_used;
void *virtual;
int ret;
virtual = ttm_kmap_obj_virtual(&vbo->map, ¬_used);
if (virtual)
return virtual;
ret = ttm_bo_kmap(bo, 0, bo->num_pages, &vbo->map);
if (ret)
DRM_ERROR("Buffer object map failed: %d.\n", ret);
return ttm_kmap_obj_virtual(&vbo->map, ¬_used);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Hellstrom | 92 | 100.00% | 1 | 100.00% |
| Total | 92 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jakob Bornecrantz | 518 | 42.77% | 1 | 6.25% |
| Thomas Hellstrom | 446 | 36.83% | 8 | 50.00% |
| Christian König | 119 | 9.83% | 2 | 12.50% |
| Sinclair Yeh | 115 | 9.50% | 2 | 12.50% |
| Maarten Lankhorst | 8 | 0.66% | 1 | 6.25% |
| Thierry Reding | 3 | 0.25% | 1 | 6.25% |
| David Howells | 2 | 0.17% | 1 | 6.25% |
| Total | 1211 | 100.00% | 16 | 100.00% |
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