forked from KolibriOS/kolibrios
130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/*
|
|
* Copyright © 2008-2012 Intel Corporation
|
|
*
|
|
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS 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:
|
|
* Eric Anholt <eric@anholt.net>
|
|
* Chris Wilson <chris@chris-wilson.co.uk>
|
|
*
|
|
*/
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/i915_drm.h>
|
|
#include "i915_drv.h"
|
|
|
|
static struct sg_table *
|
|
i915_pages_create_for_fb(struct drm_device *dev,
|
|
u32 offset, u32 size)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct sg_table *st;
|
|
struct scatterlist *sg;
|
|
addr_t fb_pages;
|
|
|
|
DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size);
|
|
// BUG_ON(offset > dev_priv->gtt.stolen_size - size);
|
|
|
|
/* We hide that we have no struct page backing our stolen object
|
|
* by wrapping the contiguous physical allocation with a fake
|
|
* dma mapping in a single scatterlist.
|
|
*/
|
|
|
|
st = kmalloc(sizeof(*st), GFP_KERNEL);
|
|
if (st == NULL)
|
|
return NULL;
|
|
|
|
if (sg_alloc_table(st, 1, GFP_KERNEL)) {
|
|
kfree(st);
|
|
return NULL;
|
|
}
|
|
|
|
fb_pages = AllocPages(size/PAGE_SIZE);
|
|
if(fb_pages == 0)
|
|
{
|
|
kfree(st);
|
|
return NULL;
|
|
};
|
|
|
|
sg = st->sgl;
|
|
sg->offset = offset;
|
|
sg->length = size;
|
|
|
|
sg_dma_address(sg) = (dma_addr_t)fb_pages;
|
|
sg_dma_len(sg) = size;
|
|
|
|
return st;
|
|
}
|
|
|
|
|
|
static int kos_fb_object_get_pages(struct drm_i915_gem_object *obj)
|
|
{
|
|
BUG();
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void kos_fb_object_put_pages(struct drm_i915_gem_object *obj)
|
|
{
|
|
/* Should only be called during free */
|
|
sg_free_table(obj->pages);
|
|
kfree(obj->pages);
|
|
}
|
|
|
|
static const struct drm_i915_gem_object_ops kos_fb_object_ops = {
|
|
.get_pages = kos_fb_object_get_pages,
|
|
.put_pages = kos_fb_object_put_pages,
|
|
};
|
|
|
|
static struct drm_i915_gem_object *
|
|
_kos_fb_object_create(struct drm_device *dev,
|
|
struct drm_mm_node *fb_node)
|
|
{
|
|
struct drm_i915_gem_object *obj;
|
|
|
|
obj = i915_gem_object_alloc(dev);
|
|
if (obj == NULL)
|
|
return NULL;
|
|
|
|
drm_gem_private_object_init(dev, &obj->base, fb_node->size);
|
|
i915_gem_object_init(obj, &kos_fb_object_ops);
|
|
|
|
obj->pages = i915_pages_create_for_fb(dev,
|
|
fb_node->start, fb_node->size);
|
|
if (obj->pages == NULL)
|
|
goto cleanup;
|
|
|
|
obj->has_dma_mapping = true;
|
|
i915_gem_object_pin_pages(obj);
|
|
obj->stolen = fb_node;
|
|
|
|
obj->base.read_domains = I915_GEM_DOMAIN_GTT;
|
|
obj->cache_level = I915_CACHE_NONE;
|
|
obj->tiling_mode = I915_TILING_X;
|
|
|
|
return obj;
|
|
|
|
cleanup:
|
|
i915_gem_object_free(obj);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|