| 30,6 → 30,9 |
|---|
| #include <drm/i915_drm.h> |
| #include "i915_drv.h" |
| |
| #define KB(x) ((x) * 1024) |
| #define MB(x) (KB(x) * 1024) |
| |
| /* |
| * The BIOS typically reserves some of the system's memory for the exclusive |
| * use of the integrated graphics. This memory is no longer available for |
| 42,6 → 45,46 |
|---|
| * for is a boon. |
| */ |
| |
| int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv, |
| struct drm_mm_node *node, u64 size, |
| unsigned alignment, u64 start, u64 end) |
| { |
| int ret; |
| |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return -ENODEV; |
| |
| /* See the comment at the drm_mm_init() call for more about this check. |
| * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */ |
| if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096) |
| start = 4096; |
| |
| mutex_lock(&dev_priv->mm.stolen_lock); |
| ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size, |
| alignment, start, end, |
| DRM_MM_SEARCH_DEFAULT); |
| mutex_unlock(&dev_priv->mm.stolen_lock); |
| |
| return ret; |
| } |
| |
| int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv, |
| struct drm_mm_node *node, u64 size, |
| unsigned alignment) |
| { |
| return i915_gem_stolen_insert_node_in_range(dev_priv, node, size, |
| alignment, 0, |
| dev_priv->gtt.stolen_usable_size); |
| } |
| |
| void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv, |
| struct drm_mm_node *node) |
| { |
| mutex_lock(&dev_priv->mm.stolen_lock); |
| drm_mm_remove_node(node); |
| mutex_unlock(&dev_priv->mm.stolen_lock); |
| } |
| |
| static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| 51,13 → 94,13 |
|---|
| /* Almost universally we can find the Graphics Base of Stolen Memory |
| * at offset 0x5c in the igfx configuration space. On a few (desktop) |
| * machines this is also mirrored in the bridge device at different |
| * locations, or in the MCHBAR. On gen2, the layout is again 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. |
| * locations, or in the MCHBAR. |
| * |
| * XXX However gen2 requires an unavailable symbol. |
| * On 865 we just check the TOUD register. |
| * |
| * On 830/845/85x the stolen memory base isn't available in any |
| * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size. |
| * |
| */ |
| base = 0; |
| if (INTEL_INFO(dev)->gen >= 3) { |
| 152,151 → 195,139 |
|---|
| return base; |
| } |
| |
| static int find_compression_threshold(struct drm_device *dev, |
| struct drm_mm_node *node, |
| int size, |
| int fb_cpp) |
| void i915_gem_cleanup_stolen(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| int compression_threshold = 1; |
| int ret; |
| |
| /* HACK: This code depends on what we will do in *_enable_fbc. If that |
| * code changes, this code needs to change as well. |
| * |
| * The enable_fbc code will attempt to use one of our 2 compression |
| * thresholds, therefore, in that case, we only have 1 resort. |
| */ |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return; |
| |
| /* Try to over-allocate to reduce reallocations and fragmentation. */ |
| ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
| size <<= 1, 4096, DRM_MM_SEARCH_DEFAULT); |
| if (ret == 0) |
| return compression_threshold; |
| |
| again: |
| /* HW's ability to limit the CFB is 1:4 */ |
| if (compression_threshold > 4 || |
| (fb_cpp == 2 && compression_threshold == 2)) |
| return 0; |
| |
| ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
| size >>= 1, 4096, |
| DRM_MM_SEARCH_DEFAULT); |
| if (ret && INTEL_INFO(dev)->gen <= 4) { |
| return 0; |
| } else if (ret) { |
| compression_threshold <<= 1; |
| goto again; |
| } else { |
| return compression_threshold; |
| drm_mm_takedown(&dev_priv->mm.stolen); |
| } |
| } |
| |
| static int i915_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
| static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| unsigned long *base, unsigned long *size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| struct drm_mm_node *uninitialized_var(compressed_llb); |
| int ret; |
| uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ? |
| CTG_STOLEN_RESERVED : |
| ELK_STOLEN_RESERVED); |
| unsigned long stolen_top = dev_priv->mm.stolen_base + |
| dev_priv->gtt.stolen_size; |
| |
| ret = find_compression_threshold(dev, &dev_priv->fbc.compressed_fb, |
| size, fb_cpp); |
| if (!ret) |
| goto err_llb; |
| else if (ret > 1) { |
| DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n"); |
| *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; |
| |
| } |
| WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); |
| |
| dev_priv->fbc.threshold = ret; |
| |
| if (HAS_PCH_SPLIT(dev)) |
| I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
| else if (IS_GM45(dev)) { |
| I915_WRITE(DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
| } else { |
| compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL); |
| if (!compressed_llb) |
| goto err_fb; |
| |
| ret = drm_mm_insert_node(&dev_priv->mm.stolen, compressed_llb, |
| 4096, 4096, DRM_MM_SEARCH_DEFAULT); |
| if (ret) |
| goto err_fb; |
| |
| dev_priv->fbc.compressed_llb = compressed_llb; |
| |
| I915_WRITE(FBC_CFB_BASE, |
| dev_priv->mm.stolen_base + dev_priv->fbc.compressed_fb.start); |
| I915_WRITE(FBC_LL_BASE, |
| dev_priv->mm.stolen_base + compressed_llb->start); |
| /* On these platforms, the register doesn't have a size field, so the |
| * size is the distance between the base and the top of the stolen |
| * memory. We also have the genuine case where base is zero and there's |
| * nothing reserved. */ |
| if (*base == 0) |
| *size = 0; |
| else |
| *size = stolen_top - *base; |
| } |
| |
| dev_priv->fbc.size = size / dev_priv->fbc.threshold; |
| static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| unsigned long *base, unsigned long *size) |
| { |
| uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
| size); |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| |
| return 0; |
| |
| err_fb: |
| kfree(compressed_llb); |
| drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
| err_llb: |
| pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size); |
| return -ENOSPC; |
| switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) { |
| case GEN6_STOLEN_RESERVED_1M: |
| *size = 1024 * 1024; |
| break; |
| case GEN6_STOLEN_RESERVED_512K: |
| *size = 512 * 1024; |
| break; |
| case GEN6_STOLEN_RESERVED_256K: |
| *size = 256 * 1024; |
| break; |
| case GEN6_STOLEN_RESERVED_128K: |
| *size = 128 * 1024; |
| break; |
| default: |
| *size = 1024 * 1024; |
| MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK); |
| } |
| } |
| |
| int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
| static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| unsigned long *base, unsigned long *size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return -ENODEV; |
| *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; |
| |
| if (size < dev_priv->fbc.size) |
| return 0; |
| |
| /* Release any current block */ |
| i915_gem_stolen_cleanup_compression(dev); |
| |
| return i915_setup_compression(dev, size, fb_cpp); |
| switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { |
| case GEN7_STOLEN_RESERVED_1M: |
| *size = 1024 * 1024; |
| break; |
| case GEN7_STOLEN_RESERVED_256K: |
| *size = 256 * 1024; |
| break; |
| default: |
| *size = 1024 * 1024; |
| MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); |
| } |
| } |
| |
| void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
| static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| unsigned long *base, unsigned long *size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| if (dev_priv->fbc.size == 0) |
| return; |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| |
| drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
| |
| if (dev_priv->fbc.compressed_llb) { |
| drm_mm_remove_node(dev_priv->fbc.compressed_llb); |
| kfree(dev_priv->fbc.compressed_llb); |
| switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) { |
| case GEN8_STOLEN_RESERVED_1M: |
| *size = 1024 * 1024; |
| break; |
| case GEN8_STOLEN_RESERVED_2M: |
| *size = 2 * 1024 * 1024; |
| break; |
| case GEN8_STOLEN_RESERVED_4M: |
| *size = 4 * 1024 * 1024; |
| break; |
| case GEN8_STOLEN_RESERVED_8M: |
| *size = 8 * 1024 * 1024; |
| break; |
| default: |
| *size = 8 * 1024 * 1024; |
| MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK); |
| } |
| |
| dev_priv->fbc.size = 0; |
| } |
| |
| void i915_gem_cleanup_stolen(struct drm_device *dev) |
| static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| unsigned long *base, unsigned long *size) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| unsigned long stolen_top; |
| |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return; |
| stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
| |
| i915_gem_stolen_cleanup_compression(dev); |
| drm_mm_takedown(&dev_priv->mm.stolen); |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| |
| /* On these platforms, the register doesn't have a size field, so the |
| * size is the distance between the base and the top of the stolen |
| * memory. We also have the genuine case where base is zero and there's |
| * nothing reserved. */ |
| if (*base == 0) |
| *size = 0; |
| else |
| *size = stolen_top - *base; |
| } |
| |
| int i915_gem_init_stolen(struct drm_device *dev) |
| { |
| struct drm_i915_private *dev_priv = dev->dev_private; |
| u32 tmp; |
| int bios_reserved = 0; |
| unsigned long reserved_total, reserved_base = 0, reserved_size; |
| unsigned long stolen_top; |
| |
| mutex_init(&dev_priv->mm.stolen_lock); |
| |
| #ifdef CONFIG_INTEL_IOMMU |
| if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
| DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
| 311,27 → 342,79 |
|---|
| 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); |
| stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size; |
| |
| if (INTEL_INFO(dev)->gen >= 8) { |
| tmp = I915_READ(GEN7_BIOS_RESERVED); |
| tmp >>= GEN8_BIOS_RESERVED_SHIFT; |
| tmp &= GEN8_BIOS_RESERVED_MASK; |
| bios_reserved = (1024*1024) << tmp; |
| } else if (IS_GEN7(dev)) { |
| tmp = I915_READ(GEN7_BIOS_RESERVED); |
| bios_reserved = tmp & GEN7_BIOS_RESERVED_256K ? |
| 256*1024 : 1024*1024; |
| switch (INTEL_INFO(dev_priv)->gen) { |
| case 2: |
| case 3: |
| break; |
| case 4: |
| if (IS_G4X(dev)) |
| g4x_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| break; |
| case 5: |
| /* Assume the gen6 maximum for the older platforms. */ |
| reserved_size = 1024 * 1024; |
| reserved_base = stolen_top - reserved_size; |
| break; |
| case 6: |
| gen6_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| break; |
| case 7: |
| gen7_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| break; |
| default: |
| if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv)) |
| bdw_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| else |
| gen8_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| break; |
| } |
| |
| if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size)) |
| /* It is possible for the reserved base to be zero, but the register |
| * field for size doesn't have a zero option. */ |
| if (reserved_base == 0) { |
| reserved_size = 0; |
| reserved_base = stolen_top; |
| } |
| |
| if (reserved_base < dev_priv->mm.stolen_base || |
| reserved_base + reserved_size > stolen_top) { |
| DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n", |
| reserved_base, reserved_base + reserved_size, |
| dev_priv->mm.stolen_base, stolen_top); |
| return 0; |
| } |
| |
| /* Basic memrange allocator for stolen space */ |
| drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size - |
| bios_reserved); |
| /* It is possible for the reserved area to end before the end of stolen |
| * memory, so just consider the start. */ |
| reserved_total = stolen_top - reserved_base; |
| |
| DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n", |
| dev_priv->gtt.stolen_size >> 10, |
| (dev_priv->gtt.stolen_size - reserved_total) >> 10); |
| |
| dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size - |
| reserved_total; |
| |
| /* |
| * Basic memrange allocator for stolen space. |
| * |
| * TODO: Notice that some platforms require us to not use the first page |
| * of the stolen memory but their BIOSes may still put the framebuffer |
| * on the first page. So we don't reserve this page for now because of |
| * that. Our current solution is to just prevent new nodes from being |
| * inserted on the first page - see the check we have at |
| * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon |
| * problem later. |
| */ |
| drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_usable_size); |
| |
| return 0; |
| } |
| |
| 387,8 → 470,10 |
|---|
| static void |
| i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
| { |
| struct drm_i915_private *dev_priv = obj->base.dev->dev_private; |
| |
| if (obj->stolen) { |
| drm_mm_remove_node(obj->stolen); |
| i915_gem_stolen_remove_node(dev_priv, obj->stolen); |
| kfree(obj->stolen); |
| obj->stolen = NULL; |
| } |
| 417,7 → 502,6 |
|---|
| if (obj->pages == NULL) |
| goto cleanup; |
| |
| obj->has_dma_mapping = true; |
| i915_gem_object_pin_pages(obj); |
| obj->stolen = stolen; |
| |
| 450,8 → 534,7 |
|---|
| if (!stolen) |
| return NULL; |
| |
| ret = drm_mm_insert_node(&dev_priv->mm.stolen, stolen, size, |
| 4096, DRM_MM_SEARCH_DEFAULT); |
| ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
| if (ret) { |
| kfree(stolen); |
| return NULL; |
| 461,7 → 544,7 |
|---|
| if (obj) |
| return obj; |
| |
| drm_mm_remove_node(stolen); |
| i915_gem_stolen_remove_node(dev_priv, stolen); |
| kfree(stolen); |
| return NULL; |
| } |
| 486,10 → 569,8 |
|---|
| stolen_offset, gtt_offset, size); |
| |
| /* KISS and expect everything to be page-aligned */ |
| BUG_ON(stolen_offset & 4095); |
| BUG_ON(size & 4095); |
| |
| if (WARN_ON(size == 0)) |
| if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
| WARN_ON(stolen_offset & 4095)) |
| return NULL; |
| |
| stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
| 498,7 → 579,9 |
|---|
| |
| stolen->start = stolen_offset; |
| stolen->size = size; |
| mutex_lock(&dev_priv->mm.stolen_lock); |
| ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
| mutex_unlock(&dev_priv->mm.stolen_lock); |
| if (ret) { |
| DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
| kfree(stolen); |
| 508,7 → 591,7 |
|---|
| obj = _i915_gem_object_create_stolen(dev, stolen); |
| if (obj == NULL) { |
| DRM_DEBUG_KMS("failed to allocate stolen object\n"); |
| drm_mm_remove_node(stolen); |
| i915_gem_stolen_remove_node(dev_priv, stolen); |
| kfree(stolen); |
| return NULL; |
| } |
| 520,7 → 603,7 |
|---|
| vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
| if (IS_ERR(vma)) { |
| ret = PTR_ERR(vma); |
| goto err_out; |
| goto err; |
| } |
| |
| /* To simplify the initialisation sequence between KMS and GTT, |
| 534,23 → 617,20 |
|---|
| ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); |
| if (ret) { |
| DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
| goto err_vma; |
| goto err; |
| } |
| } |
| |
| vma->bound |= GLOBAL_BIND; |
| __i915_vma_set_map_and_fenceable(vma); |
| list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
| } |
| |
| list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
| list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
| i915_gem_object_pin_pages(obj); |
| |
| return obj; |
| |
| err_vma: |
| i915_gem_vma_destroy(vma); |
| err_out: |
| drm_mm_remove_node(stolen); |
| kfree(stolen); |
| err: |
| drm_gem_object_unreference(&obj->base); |
| return NULL; |
| } |