| 0,0 → 1,199 |
|---|
| /* |
| * 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; |
| } |
| |
| |
| struct drm_i915_gem_object * |
| kos_gem_fb_object_create(struct drm_device *dev, |
| u32 gtt_offset, |
| u32 size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct i915_address_space *ggtt = &dev_priv->gtt.base; |
| struct drm_i915_gem_object *obj; |
| struct drm_mm_node *fb_node; |
| struct i915_vma *vma; |
| int ret; |
| |
| DRM_DEBUG_KMS("creating preallocated framebuffer object: gtt_offset=%x, size=%x\n", |
| gtt_offset, size); |
| |
| /* KISS and expect everything to be page-aligned */ |
| BUG_ON(size & 4095); |
| |
| if (WARN_ON(size == 0)) |
| return NULL; |
| |
| fb_node = kzalloc(sizeof(*fb_node), GFP_KERNEL); |
| if (!fb_node) |
| return NULL; |
| |
| fb_node->start = gtt_offset; |
| fb_node->size = size; |
| |
| obj = _kos_fb_object_create(dev, fb_node); |
| if (obj == NULL) { |
| DRM_DEBUG_KMS("failed to preallocate framebuffer object\n"); |
| kfree(fb_node); |
| return NULL; |
| } |
| |
| vma = i915_gem_vma_create(obj, ggtt); |
| if (IS_ERR(vma)) { |
| ret = PTR_ERR(vma); |
| goto err_out; |
| } |
| |
| /* To simplify the initialisation sequence between KMS and GTT, |
| * we allow construction of the stolen object prior to |
| * setting up the GTT space. The actual reservation will occur |
| * later. |
| */ |
| vma->node.start = gtt_offset; |
| vma->node.size = size; |
| if (drm_mm_initialized(&ggtt->mm)) { |
| ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); |
| if (ret) { |
| DRM_DEBUG_KMS("failed to allocate framebuffer GTT space\n"); |
| goto err_vma; |
| } |
| } |
| |
| obj->has_global_gtt_mapping = 1; |
| |
| list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
| list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
| |
| return obj; |
| |
| err_vma: |
| i915_gem_vma_destroy(vma); |
| err_out: |
| kfree(fb_node); |
| drm_gem_object_unreference(&obj->base); |
| return NULL; |
| } |
| |