| 42,85 → 42,73 |
|---|
| * for is a boon. |
| */ |
| |
| #define PTE_ADDRESS_MASK 0xfffff000 |
| #define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */ |
| #define PTE_MAPPING_TYPE_UNCACHED (0 << 1) |
| #define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */ |
| #define PTE_MAPPING_TYPE_CACHED (3 << 1) |
| #define PTE_MAPPING_TYPE_MASK (3 << 1) |
| #define PTE_VALID (1 << 0) |
| |
| /** |
| * i915_stolen_to_phys - take an offset into stolen memory and turn it into |
| * a physical one |
| * @dev: drm device |
| * @offset: address to translate |
| * |
| * Some chip functions require allocations from stolen space and need the |
| * physical address of the memory in question. |
| */ |
| static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset) |
| static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct pci_dev *pdev = dev_priv->bridge_dev; |
| u32 base; |
| |
| #if 0 |
| /* On the machines I have tested the Graphics Base of Stolen Memory |
| * is unreliable, so compute the base by subtracting the stolen memory |
| * from the Top of Low Usable DRAM which is where the BIOS places |
| * the graphics stolen memory. |
| * is unreliable, so on those compute the base by subtracting the |
| * stolen memory from the Top of Low Usable DRAM which is where the |
| * BIOS places the graphics stolen memory. |
| * |
| * On gen2, the layout is slightly different with the Graphics Segment |
| * immediately following Top of Memory (or Top of Usable DRAM). Note |
| * it appears that TOUD is only reported by 865g, so we just use the |
| * top of memory as determined by the e820 probe. |
| * |
| * XXX gen2 requires an unavailable symbol and 945gm fails with |
| * its value of TOLUD. |
| */ |
| if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
| /* top 32bits are reserved = 0 */ |
| base = 0; |
| if (INTEL_INFO(dev)->gen >= 6) { |
| /* Read Base Data of Stolen Memory Register (BDSM) directly. |
| * Note that there is also a MCHBAR miror at 0x1080c0 or |
| * we could use device 2:0x5c instead. |
| */ |
| pci_read_config_dword(pdev, 0xB0, &base); |
| base &= ~4095; /* lower bits used for locking register */ |
| } else if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
| /* Read Graphics Base of Stolen Memory directly */ |
| pci_read_config_dword(pdev, 0xA4, &base); |
| } else { |
| /* XXX presume 8xx is the same as i915 */ |
| pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base); |
| } |
| #else |
| if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) { |
| u16 val; |
| pci_read_config_word(pdev, 0xb0, &val); |
| base = val >> 4 << 20; |
| } else { |
| #if 0 |
| } else if (IS_GEN3(dev)) { |
| u8 val; |
| /* Stolen is immediately below Top of Low Usable DRAM */ |
| pci_read_config_byte(pdev, 0x9c, &val); |
| base = val >> 3 << 27; |
| } |
| base -= dev_priv->mm.gtt->stolen_size; |
| } else { |
| /* Stolen is immediately above Top of Memory */ |
| base = max_low_pfn_mapped << PAGE_SHIFT; |
| #endif |
| |
| return base + offset; |
| } |
| |
| static void i915_warn_stolen(struct drm_device *dev) |
| { |
| DRM_INFO("not enough stolen space for compressed buffer, disabling\n"); |
| DRM_INFO("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); |
| return base; |
| } |
| |
| static void i915_setup_compression(struct drm_device *dev, int size) |
| static int i915_setup_compression(struct drm_device *dev, int size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_mm_node *compressed_fb, *uninitialized_var(compressed_llb); |
| unsigned long cfb_base; |
| unsigned long ll_base = 0; |
| |
| /* Just in case the BIOS is doing something questionable. */ |
| intel_disable_fbc(dev); |
| |
| compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); |
| /* Try to over-allocate to reduce reallocations and fragmentation */ |
| compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, |
| size <<= 1, 4096, 0); |
| if (!compressed_fb) |
| compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, |
| size >>= 1, 4096, 0); |
| if (compressed_fb) |
| compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); |
| if (!compressed_fb) |
| goto err; |
| |
| cfb_base = i915_stolen_to_phys(dev, compressed_fb->start); |
| if (!cfb_base) |
| goto err_fb; |
| |
| if (!(IS_GM45(dev) || HAS_PCH_SPLIT(dev))) { |
| if (HAS_PCH_SPLIT(dev)) |
| I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); |
| else if (IS_GM45(dev)) { |
| I915_WRITE(DPFC_CB_BASE, compressed_fb->start); |
| } else { |
| compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen, |
| 4096, 4096, 0); |
| if (compressed_llb) |
| 129,73 → 117,206 |
|---|
| if (!compressed_llb) |
| goto err_fb; |
| |
| ll_base = i915_stolen_to_phys(dev, compressed_llb->start); |
| if (!ll_base) |
| goto err_llb; |
| dev_priv->compressed_llb = compressed_llb; |
| |
| I915_WRITE(FBC_CFB_BASE, |
| dev_priv->mm.stolen_base + compressed_fb->start); |
| I915_WRITE(FBC_LL_BASE, |
| dev_priv->mm.stolen_base + compressed_llb->start); |
| } |
| |
| dev_priv->compressed_fb = compressed_fb; |
| dev_priv->cfb_size = size; |
| |
| dev_priv->compressed_fb = compressed_fb; |
| if (HAS_PCH_SPLIT(dev)) |
| I915_WRITE(ILK_DPFC_CB_BASE, compressed_fb->start); |
| else if (IS_GM45(dev)) { |
| I915_WRITE(DPFC_CB_BASE, compressed_fb->start); |
| } else { |
| I915_WRITE(FBC_CFB_BASE, cfb_base); |
| I915_WRITE(FBC_LL_BASE, ll_base); |
| dev_priv->compressed_llb = compressed_llb; |
| } |
| DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
| size); |
| |
| DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", |
| cfb_base, ll_base, size >> 20); |
| return; |
| return 0; |
| |
| err_llb: |
| drm_mm_put_block(compressed_llb); |
| err_fb: |
| drm_mm_put_block(compressed_fb); |
| err: |
| dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; |
| i915_warn_stolen(dev); |
| return -ENOSPC; |
| } |
| |
| static void i915_cleanup_compression(struct drm_device *dev) |
| int i915_gem_stolen_setup_compression(struct drm_device *dev, int size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (dev_priv->mm.stolen_base == 0) |
| return -ENODEV; |
| |
| if (size < dev_priv->cfb_size) |
| return 0; |
| |
| /* Release any current block */ |
| i915_gem_stolen_cleanup_compression(dev); |
| |
| return i915_setup_compression(dev, size); |
| } |
| |
| void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| if (dev_priv->cfb_size == 0) |
| return; |
| |
| if (dev_priv->compressed_fb) |
| drm_mm_put_block(dev_priv->compressed_fb); |
| |
| if (dev_priv->compressed_llb) |
| drm_mm_put_block(dev_priv->compressed_llb); |
| |
| dev_priv->cfb_size = 0; |
| } |
| |
| void i915_gem_cleanup_stolen(struct drm_device *dev) |
| { |
| if (I915_HAS_FBC(dev) && i915_powersave) |
| i915_cleanup_compression(dev); |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| |
| i915_gem_stolen_cleanup_compression(dev); |
| drm_mm_takedown(&dev_priv->mm.stolen); |
| } |
| |
| int i915_gem_init_stolen(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| unsigned long prealloc_size = dev_priv->mm.gtt->stolen_size; |
| |
| dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
| if (dev_priv->mm.stolen_base == 0) |
| return 0; |
| |
| DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n", |
| dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base); |
| |
| /* Basic memrange allocator for stolen space */ |
| drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size); |
| drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size); |
| |
| /* Try to set up FBC with a reasonable compressed buffer size */ |
| if (I915_HAS_FBC(dev) && i915_powersave) { |
| int cfb_size; |
| return 0; |
| } |
| |
| /* Leave 1M for line length buffer & misc. */ |
| static struct sg_table * |
| i915_pages_create_for_stolen(struct drm_device *dev, |
| u32 offset, u32 size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct sg_table *st; |
| struct scatterlist *sg; |
| |
| /* Try to get a 32M buffer... */ |
| if (prealloc_size > (36*1024*1024)) |
| cfb_size = 32*1024*1024; |
| else /* fall back to 7/8 of the stolen space */ |
| cfb_size = prealloc_size * 7 / 8; |
| i915_setup_compression(dev, cfb_size); |
| 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; |
| } |
| |
| return 0; |
| sg = st->sgl; |
| sg->offset = offset; |
| sg->length = size; |
| |
| sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; |
| sg_dma_len(sg) = size; |
| |
| return st; |
| } |
| |
| static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
| { |
| BUG(); |
| return -EINVAL; |
| } |
| |
| static void i915_gem_object_put_pages_stolen(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 i915_gem_object_stolen_ops = { |
| .get_pages = i915_gem_object_get_pages_stolen, |
| .put_pages = i915_gem_object_put_pages_stolen, |
| }; |
| |
| static struct drm_i915_gem_object * |
| _i915_gem_object_create_stolen(struct drm_device *dev, |
| struct drm_mm_node *stolen) |
| { |
| struct drm_i915_gem_object *obj; |
| |
| obj = i915_gem_object_alloc(dev); |
| if (obj == NULL) |
| return NULL; |
| |
| if (drm_gem_private_object_init(dev, &obj->base, stolen->size)) |
| goto cleanup; |
| |
| i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
| |
| obj->pages = i915_pages_create_for_stolen(dev, |
| stolen->start, stolen->size); |
| if (obj->pages == NULL) |
| goto cleanup; |
| |
| obj->has_dma_mapping = true; |
| obj->pages_pin_count = 1; |
| obj->stolen = stolen; |
| |
| obj->base.write_domain = I915_GEM_DOMAIN_GTT; |
| obj->base.read_domains = I915_GEM_DOMAIN_GTT; |
| obj->cache_level = I915_CACHE_NONE; |
| |
| return obj; |
| |
| cleanup: |
| i915_gem_object_free(obj); |
| return NULL; |
| } |
| |
| struct drm_i915_gem_object * |
| i915_gem_object_create_stolen(struct drm_device *dev, u32 size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_i915_gem_object *obj; |
| struct drm_mm_node *stolen; |
| |
| if (dev_priv->mm.stolen_base == 0) |
| return NULL; |
| |
| DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); |
| if (size == 0) |
| return NULL; |
| |
| stolen = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0); |
| if (stolen) |
| stolen = drm_mm_get_block(stolen, size, 4096); |
| if (stolen == NULL) |
| return NULL; |
| |
| obj = _i915_gem_object_create_stolen(dev, stolen); |
| if (obj) |
| return obj; |
| |
| drm_mm_put_block(stolen); |
| return NULL; |
| } |
| |
| void |
| i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
| { |
| if (obj->stolen) { |
| drm_mm_put_block(obj->stolen); |
| obj->stolen = NULL; |
| } |
| } |