linux/drivers/gpu/drm/qxl/qxl_image.c
Dave Airlie 8002db6336 qxl: convert qxl driver to proper use for reservations
The recent addition of lockdep support to reservations and their subsequent
use by TTM showed up a number of potential problems with the way qxl was using
TTM objects.

a) it was allocating objects, and reserving them later without validating
underneath the reservation, which meant in extreme conditions the objects could
be evicted before the reservation ever used them.

b) it was reserving objects straight after allocating them, but with no
ability to back off should the reservations fail. It now allocates the necessary
objects then does a complete reservation pass on them to avoid deadlocks.

c) it had two lists per release tracking objects, unnecessary complicating
the reservation process.

This patch removes the dual object tracking, adds reservations ticket support
to the release and fence object handling. It then ports the internal fb
drawing code and the userspace facing ioctl to use the new interfaces properly,
along with cleanup up the error path handling in some codepaths.

Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-07-24 11:58:10 +10:00

238 lines
6.2 KiB
C

/*
* Copyright 2013 Red Hat Inc.
*
* 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Dave Airlie
* Alon Levy
*/
#include <linux/gfp.h>
#include <linux/slab.h>
#include "qxl_drv.h"
#include "qxl_object.h"
static int
qxl_allocate_chunk(struct qxl_device *qdev,
struct qxl_release *release,
struct qxl_drm_image *image,
unsigned int chunk_size)
{
struct qxl_drm_chunk *chunk;
int ret;
chunk = kmalloc(sizeof(struct qxl_drm_chunk), GFP_KERNEL);
if (!chunk)
return -ENOMEM;
ret = qxl_alloc_bo_reserved(qdev, release, chunk_size, &chunk->bo);
if (ret) {
kfree(chunk);
return ret;
}
list_add_tail(&chunk->head, &image->chunk_list);
return 0;
}
int
qxl_image_alloc_objects(struct qxl_device *qdev,
struct qxl_release *release,
struct qxl_drm_image **image_ptr,
int height, int stride)
{
struct qxl_drm_image *image;
int ret;
image = kmalloc(sizeof(struct qxl_drm_image), GFP_KERNEL);
if (!image)
return -ENOMEM;
INIT_LIST_HEAD(&image->chunk_list);
ret = qxl_alloc_bo_reserved(qdev, release, sizeof(struct qxl_image), &image->bo);
if (ret) {
kfree(image);
return ret;
}
ret = qxl_allocate_chunk(qdev, release, image, sizeof(struct qxl_data_chunk) + stride * height);
if (ret) {
qxl_bo_unref(&image->bo);
kfree(image);
return ret;
}
*image_ptr = image;
return 0;
}
void qxl_image_free_objects(struct qxl_device *qdev, struct qxl_drm_image *dimage)
{
struct qxl_drm_chunk *chunk, *tmp;
list_for_each_entry_safe(chunk, tmp, &dimage->chunk_list, head) {
qxl_bo_unref(&chunk->bo);
kfree(chunk);
}
qxl_bo_unref(&dimage->bo);
kfree(dimage);
}
static int
qxl_image_init_helper(struct qxl_device *qdev,
struct qxl_release *release,
struct qxl_drm_image *dimage,
const uint8_t *data,
int width, int height,
int depth, unsigned int hash,
int stride)
{
struct qxl_drm_chunk *drv_chunk;
struct qxl_image *image;
struct qxl_data_chunk *chunk;
int i;
int chunk_stride;
int linesize = width * depth / 8;
struct qxl_bo *chunk_bo, *image_bo;
void *ptr;
/* Chunk */
/* FIXME: Check integer overflow */
/* TODO: variable number of chunks */
drv_chunk = list_first_entry(&dimage->chunk_list, struct qxl_drm_chunk, head);
chunk_bo = drv_chunk->bo;
chunk_stride = stride; /* TODO: should use linesize, but it renders
wrong (check the bitmaps are sent correctly
first) */
ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, 0);
chunk = ptr;
chunk->data_size = height * chunk_stride;
chunk->prev_chunk = 0;
chunk->next_chunk = 0;
qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
{
void *k_data, *i_data;
int remain;
int page;
int size;
if (stride == linesize && chunk_stride == stride) {
remain = linesize * height;
page = 0;
i_data = (void *)data;
while (remain > 0) {
ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page << PAGE_SHIFT);
if (page == 0) {
chunk = ptr;
k_data = chunk->data;
size = PAGE_SIZE - offsetof(struct qxl_data_chunk, data);
} else {
k_data = ptr;
size = PAGE_SIZE;
}
size = min(size, remain);
memcpy(k_data, i_data, size);
qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
i_data += size;
remain -= size;
page++;
}
} else {
unsigned page_base, page_offset, out_offset;
for (i = 0 ; i < height ; ++i) {
i_data = (void *)data + i * stride;
remain = linesize;
out_offset = offsetof(struct qxl_data_chunk, data) + i * chunk_stride;
while (remain > 0) {
page_base = out_offset & PAGE_MASK;
page_offset = offset_in_page(out_offset);
size = min((int)(PAGE_SIZE - page_offset), remain);
ptr = qxl_bo_kmap_atomic_page(qdev, chunk_bo, page_base);
k_data = ptr + page_offset;
memcpy(k_data, i_data, size);
qxl_bo_kunmap_atomic_page(qdev, chunk_bo, ptr);
remain -= size;
i_data += size;
out_offset += size;
}
}
}
}
qxl_bo_kunmap(chunk_bo);
image_bo = dimage->bo;
ptr = qxl_bo_kmap_atomic_page(qdev, image_bo, 0);
image = ptr;
image->descriptor.id = 0;
image->descriptor.type = SPICE_IMAGE_TYPE_BITMAP;
image->descriptor.flags = 0;
image->descriptor.width = width;
image->descriptor.height = height;
switch (depth) {
case 1:
/* TODO: BE? check by arch? */
image->u.bitmap.format = SPICE_BITMAP_FMT_1BIT_BE;
break;
case 24:
image->u.bitmap.format = SPICE_BITMAP_FMT_24BIT;
break;
case 32:
image->u.bitmap.format = SPICE_BITMAP_FMT_32BIT;
break;
default:
DRM_ERROR("unsupported image bit depth\n");
return -EINVAL; /* TODO: cleanup */
}
image->u.bitmap.flags = QXL_BITMAP_TOP_DOWN;
image->u.bitmap.x = width;
image->u.bitmap.y = height;
image->u.bitmap.stride = chunk_stride;
image->u.bitmap.palette = 0;
image->u.bitmap.data = qxl_bo_physical_address(qdev, chunk_bo, 0);
qxl_bo_kunmap_atomic_page(qdev, image_bo, ptr);
return 0;
}
int qxl_image_init(struct qxl_device *qdev,
struct qxl_release *release,
struct qxl_drm_image *dimage,
const uint8_t *data,
int x, int y, int width, int height,
int depth, int stride)
{
data += y * stride + x * (depth / 8);
return qxl_image_init_helper(qdev, release, dimage, data,
width, height, depth, 0, stride);
}