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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4280 | Serge | 1 | /* |
| 2 | * Copyright © 2008-2012 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 21 | * IN THE SOFTWARE. |
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| 22 | * |
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| 23 | * Authors: |
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| 24 | * Eric Anholt |
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| 25 | * Chris Wilson |
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| 26 | * |
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| 27 | */ |
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| 28 | |||
| 29 | #include |
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| 30 | #include |
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| 31 | #include "i915_drv.h" |
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| 32 | |||
| 33 | static struct sg_table * |
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| 34 | i915_pages_create_for_fb(struct drm_device *dev, |
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| 35 | u32 offset, u32 size) |
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| 36 | { |
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| 37 | struct drm_i915_private *dev_priv = dev->dev_private; |
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| 38 | struct sg_table *st; |
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| 39 | struct scatterlist *sg; |
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| 40 | addr_t fb_pages; |
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| 41 | |||
| 42 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); |
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| 43 | // BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
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| 44 | |||
| 45 | /* We hide that we have no struct page backing our stolen object |
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| 46 | * by wrapping the contiguous physical allocation with a fake |
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| 47 | * dma mapping in a single scatterlist. |
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| 48 | */ |
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| 49 | |||
| 50 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
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| 51 | if (st == NULL) |
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| 52 | return NULL; |
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| 53 | |||
| 54 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
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| 55 | kfree(st); |
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| 56 | return NULL; |
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| 57 | } |
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| 58 | |||
| 59 | fb_pages = AllocPages(size/PAGE_SIZE); |
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| 60 | if(fb_pages == 0) |
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| 61 | { |
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| 62 | kfree(st); |
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| 63 | return NULL; |
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| 64 | }; |
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| 65 | |||
| 66 | sg = st->sgl; |
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| 67 | sg->offset = offset; |
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| 68 | sg->length = size; |
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| 69 | |||
| 70 | sg_dma_address(sg) = (dma_addr_t)fb_pages; |
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| 71 | sg_dma_len(sg) = size; |
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| 72 | |||
| 73 | return st; |
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| 74 | } |
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| 75 | |||
| 76 | |||
| 77 | static int kos_fb_object_get_pages(struct drm_i915_gem_object *obj) |
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| 78 | { |
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| 79 | BUG(); |
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| 80 | return -EINVAL; |
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| 81 | } |
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| 82 | |||
| 83 | static void kos_fb_object_put_pages(struct drm_i915_gem_object *obj) |
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| 84 | { |
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| 85 | /* Should only be called during free */ |
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| 86 | sg_free_table(obj->pages); |
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| 87 | kfree(obj->pages); |
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| 88 | } |
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| 89 | |||
| 90 | static const struct drm_i915_gem_object_ops kos_fb_object_ops = { |
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| 91 | .get_pages = kos_fb_object_get_pages, |
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| 92 | .put_pages = kos_fb_object_put_pages, |
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| 93 | }; |
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| 94 | |||
| 95 | static struct drm_i915_gem_object * |
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| 96 | _kos_fb_object_create(struct drm_device *dev, |
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| 97 | struct drm_mm_node *fb_node) |
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| 98 | { |
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| 99 | struct drm_i915_gem_object *obj; |
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| 100 | |||
| 101 | obj = i915_gem_object_alloc(dev); |
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| 102 | if (obj == NULL) |
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| 103 | return NULL; |
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| 104 | |||
| 105 | drm_gem_private_object_init(dev, &obj->base, fb_node->size); |
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| 106 | i915_gem_object_init(obj, &kos_fb_object_ops); |
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| 107 | |||
| 108 | obj->pages = i915_pages_create_for_fb(dev, |
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| 109 | fb_node->start, fb_node->size); |
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| 110 | if (obj->pages == NULL) |
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| 111 | goto cleanup; |
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| 112 | |||
| 113 | obj->has_dma_mapping = true; |
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| 114 | i915_gem_object_pin_pages(obj); |
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| 115 | obj->stolen = fb_node; |
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| 116 | |||
| 117 | obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
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| 118 | obj->cache_level = I915_CACHE_NONE; |
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| 119 | obj->tiling_mode = I915_TILING_X; |
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| 120 | |||
| 121 | return obj; |
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| 122 | |||
| 123 | cleanup: |
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| 124 | i915_gem_object_free(obj); |
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| 125 | return NULL; |
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| 126 | } |
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| 127 |