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vmwgfx: Add dmabuf helper functions for pinning 

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jakob Bornecrantz 2011-10-04 20:13:21 +02:00 committed by Dave Airlie
parent 626ab771c2
commit d991ef0395
7 changed files with 379 additions and 107 deletions
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2
drivers/gpu/drm/vmwgfx/Makefile
View File

@ -5,6 +5,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
vmwgfx_fb.o vmwgfx_ioctl.o vmwgfx_resource.o vmwgfx_buffer.o \
vmwgfx_fifo.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \
vmwgfx_overlay.o vmwgfx_marker.o vmwgfx_gmrid_manager.o \
vmwgfx_fence.o
vmwgfx_fence.o vmwgfx_dmabuf.o
obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o

33
drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
View File

@ -42,6 +42,10 @@ static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
TTM_PL_FLAG_CACHED;
static uint32_t gmr_ne_placement_flags = VMW_PL_FLAG_GMR |
TTM_PL_FLAG_CACHED |
TTM_PL_FLAG_NO_EVICT;
struct ttm_placement vmw_vram_placement = {
.fpfn = 0,
.lpfn = 0,
@ -65,6 +69,20 @@ struct ttm_placement vmw_vram_gmr_placement = {
.busy_placement = &gmr_placement_flags
};
static uint32_t vram_gmr_ne_placement_flags[] = {
TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT,
VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED | TTM_PL_FLAG_NO_EVICT
};
struct ttm_placement vmw_vram_gmr_ne_placement = {
.fpfn = 0,
.lpfn = 0,
.num_placement = 2,
.placement = vram_gmr_ne_placement_flags,
.num_busy_placement = 1,
.busy_placement = &gmr_ne_placement_flags
};
struct ttm_placement vmw_vram_sys_placement = {
.fpfn = 0,
.lpfn = 0,
@ -92,6 +110,21 @@ struct ttm_placement vmw_sys_placement = {
.busy_placement = &sys_placement_flags
};
static uint32_t evictable_placement_flags[] = {
TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
};
struct ttm_placement vmw_evictable_placement = {
.fpfn = 0,
.lpfn = 0,
.num_placement = 3,
.placement = evictable_placement_flags,
.num_busy_placement = 1,
.busy_placement = &sys_placement_flags
};
struct vmw_ttm_backend {
struct ttm_backend backend;
struct page **pages;

292
drivers/gpu/drm/vmwgfx/vmwgfx_dmabuf.c Normal file
View File

@ -0,0 +1,292 @@
/**************************************************************************
*
* 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 "ttm/ttm_placement.h"
#include "drmP.h"
#include "vmwgfx_drv.h"
/**
* Validate a buffer to placement.
*
* May only be called by the current master as this function takes the
* its lock in write mode.
*
* 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;
ret = ttm_bo_reserve(bo, interruptible, false, false, 0);
if (unlikely(ret != 0))
goto err;
ret = ttm_bo_validate(bo, placement, interruptible, false, false);
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&vmaster->lock);
return ret;
}
/**
* Move a buffer to vram or gmr.
*
* May only be called by the current master as this function takes the
* its lock in write mode.
*
* @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;
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, 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, false);
err_unreserve:
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&vmaster->lock);
return ret;
}
/**
* Move a buffer to vram.
*
* May only be called by the current master as this function takes the
* its 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);
}
/**
* Move a buffer to start of vram.
*
* May only be called by the current master as this function takes the
* its 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_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;
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, false);
ret = ttm_bo_validate(bo, &placement, interruptible, false, 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;
}
/**
* Unpin the buffer given buffer, does not move the buffer.
*
* May only be called by the current master as this function takes the
* its 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);
}
/**
* Move a buffer to system memory, does not pin the buffer.
*
* May only be called by the current master as this function takes the
* its lock in write mode.
*
* @dev_priv: Driver private.
* @buf: DMA buffer to move.
* @interruptible: Use interruptible wait.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
int vmw_dmabuf_to_system(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool interruptible)
{
return vmw_dmabuf_to_placement(dev_priv, buf,
&vmw_sys_placement,
interruptible);
}
void vmw_dmabuf_get_id_offset(struct vmw_dma_buffer *buf,
uint32_t *gmrId, uint32_t *offset)
{
if (buf->base.mem.mem_type == TTM_PL_VRAM) {
*gmrId = SVGA_GMR_FRAMEBUFFER;
*offset = buf->base.offset;
} else {
*gmrId = buf->base.mem.start;
*offset = 0;
}
}
void vmw_dmabuf_get_guest_ptr(struct vmw_dma_buffer *buf, SVGAGuestPtr *ptr)
{
if (buf->base.mem.mem_type == TTM_PL_VRAM) {
ptr->gmrId = SVGA_GMR_FRAMEBUFFER;
ptr->offset = buf->base.offset;
} else {
ptr->gmrId = buf->base.mem.start;
ptr->offset = 0;
}
}

32
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -385,10 +385,6 @@ extern uint32_t vmw_dmabuf_validate_node(struct ttm_buffer_object *bo,
extern void vmw_dmabuf_validate_clear(struct ttm_buffer_object *bo);
extern int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile,
uint32_t id, struct vmw_dma_buffer **out);
extern int vmw_dmabuf_to_start_of_vram(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo);
extern int vmw_dmabuf_from_vram(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo);
extern int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
@ -398,6 +394,32 @@ extern int vmw_user_stream_lookup(struct vmw_private *dev_priv,
uint32_t *inout_id,
struct vmw_resource **out);
/**
* DMA buffer helper routines - vmwgfx_dmabuf.c
*/
extern int vmw_dmabuf_to_placement(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo,
struct ttm_placement *placement,
bool interruptible);
extern int vmw_dmabuf_to_vram(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool pin, bool interruptible);
extern int vmw_dmabuf_to_vram_or_gmr(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool pin, bool interruptible);
extern int vmw_dmabuf_to_start_of_vram(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo,
bool pin, bool interruptible);
extern int vmw_dmabuf_unpin(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo,
bool interruptible);
extern int vmw_dmabuf_to_system(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *bo,
bool interruptible);
extern void vmw_dmabuf_get_id_offset(struct vmw_dma_buffer *buf,
uint32_t *gmrId, uint32_t *offset);
extern void vmw_dmabuf_get_guest_ptr(struct vmw_dma_buffer *buf,
SVGAGuestPtr *ptr);
/**
* Misc Ioctl functionality - vmwgfx_ioctl.c
@ -440,7 +462,9 @@ extern struct ttm_placement vmw_vram_placement;
extern struct ttm_placement vmw_vram_ne_placement;
extern struct ttm_placement vmw_vram_sys_placement;
extern struct ttm_placement vmw_vram_gmr_placement;
extern struct ttm_placement vmw_vram_gmr_ne_placement;
extern struct ttm_placement vmw_sys_placement;
extern struct ttm_placement vmw_evictable_placement;
extern struct ttm_bo_driver vmw_bo_driver;
extern int vmw_dma_quiescent(struct drm_device *dev);

57
drivers/gpu/drm/vmwgfx/vmwgfx_fb.c
View File

@ -592,58 +592,6 @@ int vmw_fb_close(struct vmw_private *vmw_priv)
return 0;
}
int vmw_dmabuf_from_vram(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *vmw_bo)
{
struct ttm_buffer_object *bo = &vmw_bo->base;
int ret = 0;
ret = ttm_bo_reserve(bo, false, false, false, 0);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_validate(bo, &vmw_sys_placement, false, false, false);
ttm_bo_unreserve(bo);
return ret;
}
int vmw_dmabuf_to_start_of_vram(struct vmw_private *vmw_priv,
struct vmw_dma_buffer *vmw_bo)
{
struct ttm_buffer_object *bo = &vmw_bo->base;
struct ttm_placement ne_placement = vmw_vram_ne_placement;
int ret = 0;
ne_placement.lpfn = bo->num_pages;
/* interuptable? */
ret = ttm_write_lock(&vmw_priv->active_master->lock, false);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(bo, false, false, false, 0);
if (unlikely(ret != 0))
goto err_unlock;
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, false);
ret = ttm_bo_validate(bo, &ne_placement, false, false, false);
/* Could probably bug on */
WARN_ON(bo->offset != 0);
ttm_bo_unreserve(bo);
err_unlock:
ttm_write_unlock(&vmw_priv->active_master->lock);
return ret;
}
int vmw_fb_off(struct vmw_private *vmw_priv)
{
struct fb_info *info;
@ -665,7 +613,8 @@ int vmw_fb_off(struct vmw_private *vmw_priv)
par->bo_ptr = NULL;
ttm_bo_kunmap(&par->map);
vmw_dmabuf_from_vram(vmw_priv, par->vmw_bo);
/* move this to system instead of just unpinning it */
vmw_dmabuf_to_system(vmw_priv, par->vmw_bo, false);
return 0;
}
@ -691,7 +640,7 @@ int vmw_fb_on(struct vmw_private *vmw_priv)
/* Make sure that all overlays are stoped when we take over */
vmw_overlay_stop_all(vmw_priv);
ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo);
ret = vmw_dmabuf_to_start_of_vram(vmw_priv, par->vmw_bo, true, false);
if (unlikely(ret != 0)) {
DRM_ERROR("could not move buffer to start of VRAM\n");
goto err_no_buffer;

4
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
View File

@ -804,7 +804,7 @@ static int vmw_framebuffer_dmabuf_pin(struct vmw_framebuffer *vfb)
vmw_overlay_pause_all(dev_priv);
ret = vmw_dmabuf_to_start_of_vram(dev_priv, vfbd->buffer);
ret = vmw_dmabuf_to_start_of_vram(dev_priv, vfbd->buffer, true, false);
vmw_overlay_resume_all(dev_priv);
@ -824,7 +824,7 @@ static int vmw_framebuffer_dmabuf_unpin(struct vmw_framebuffer *vfb)
return 0;
}
return vmw_dmabuf_from_vram(dev_priv, vfbd->buffer);
return vmw_dmabuf_unpin(dev_priv, vfbd->buffer, false);
}
static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,

66
drivers/gpu/drm/vmwgfx/vmwgfx_overlay.c
View File

@ -86,48 +86,6 @@ static inline void fill_flush(struct vmw_escape_video_flush *cmd,
cmd->flush.streamId = stream_id;
}
/**
* Pin or unpin a buffer in vram.
*
* @dev_priv: Driver private.
* @buf: DMA buffer to pin or unpin.
* @pin: Pin buffer in vram if true.
* @interruptible: Use interruptible wait.
*
* Takes the current masters ttm lock in read.
*
* Returns
* -ERESTARTSYS if interrupted by a signal.
*/
static int vmw_dmabuf_pin_in_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 *overlay_placement = &vmw_vram_placement;
int ret;
ret = ttm_read_lock(&dev_priv->active_master->lock, interruptible);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(bo, interruptible, false, false, 0);
if (unlikely(ret != 0))
goto err;
if (pin)
overlay_placement = &vmw_vram_ne_placement;
ret = ttm_bo_validate(bo, overlay_placement, interruptible, false, false);
ttm_bo_unreserve(bo);
err:
ttm_read_unlock(&dev_priv->active_master->lock);
return ret;
}
/**
* Send put command to hw.
*
@ -247,6 +205,21 @@ static int vmw_overlay_send_stop(struct vmw_private *dev_priv,
return 0;
}
/**
* Move a buffer to vram, and pin it if @pin.
*
* XXX: This function is here to be changed at a later date.
*/
static int vmw_overlay_move_buffer(struct vmw_private *dev_priv,
struct vmw_dma_buffer *buf,
bool pin, bool inter)
{
if (pin)
return vmw_dmabuf_to_vram(dev_priv, buf, true, inter);
else
return vmw_dmabuf_unpin(dev_priv, buf, inter);
}
/**
* Stop or pause a stream.
*
@ -279,8 +252,8 @@ static int vmw_overlay_stop(struct vmw_private *dev_priv,
return ret;
/* We just remove the NO_EVICT flag so no -ENOMEM */
ret = vmw_dmabuf_pin_in_vram(dev_priv, stream->buf, false,
interruptible);
ret = vmw_overlay_move_buffer(dev_priv, stream->buf, false,
interruptible);
if (interruptible && ret == -ERESTARTSYS)
return ret;
else
@ -342,7 +315,7 @@ static int vmw_overlay_update_stream(struct vmw_private *dev_priv,
/* We don't start the old stream if we are interrupted.
* Might return -ENOMEM if it can't fit the buffer in vram.
*/
ret = vmw_dmabuf_pin_in_vram(dev_priv, buf, true, interruptible);
ret = vmw_overlay_move_buffer(dev_priv, buf, true, interruptible);
if (ret)
return ret;
@ -351,7 +324,8 @@ static int vmw_overlay_update_stream(struct vmw_private *dev_priv,
/* This one needs to happen no matter what. We only remove
* the NO_EVICT flag so this is safe from -ENOMEM.
*/
BUG_ON(vmw_dmabuf_pin_in_vram(dev_priv, buf, false, false) != 0);
BUG_ON(vmw_overlay_move_buffer(dev_priv, buf, false, false)
!= 0);
return ret;
}