| /* |
| * 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" |
| |
| /* |
| * 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 |
| * use by the OS and so the user finds that his system has less memory |
| * available than he put in. We refer to this memory as stolen. |
| * |
| * The BIOS will allocate its framebuffer from the stolen memory. Our |
| * goal is try to reuse that object for our own fbcon which must always |
| * be available for panics. Anything else we can reuse the stolen memory |
| * 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; |
| |
| /* WaSkipStolenMemoryFirstPage:bdw+ */ |
| if (INTEL_GEN(dev_priv) >= 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, 0, |
| start, end, DRM_MM_INSERT_BEST); |
| 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, U64_MAX); |
| } |
| |
| 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 int i915_adjust_stolen(struct drm_i915_private *dev_priv, |
| struct resource *dsm) |
| { |
| struct i915_ggtt *ggtt = &dev_priv->ggtt; |
| struct resource *r; |
| |
| if (dsm->start == 0 || dsm->end <= dsm->start) |
| return -EINVAL; |
| |
| /* |
| * TODO: We have yet too encounter the case where the GTT wasn't at the |
| * end of stolen. With that assumption we could simplify this. |
| */ |
| |
| /* Make sure we don't clobber the GTT if it's within stolen memory */ |
| if (INTEL_GEN(dev_priv) <= 4 && |
| !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) { |
| struct resource stolen[2] = {*dsm, *dsm}; |
| struct resource ggtt_res; |
| resource_size_t ggtt_start; |
| |
| ggtt_start = I915_READ(PGTBL_CTL); |
| if (IS_GEN4(dev_priv)) |
| ggtt_start = (ggtt_start & PGTBL_ADDRESS_LO_MASK) | |
| (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28; |
| else |
| ggtt_start &= PGTBL_ADDRESS_LO_MASK; |
| |
| ggtt_res = |
| (struct resource) DEFINE_RES_MEM(ggtt_start, |
| ggtt_total_entries(ggtt) * 4); |
| |
| if (ggtt_res.start >= stolen[0].start && ggtt_res.start < stolen[0].end) |
| stolen[0].end = ggtt_res.start; |
| if (ggtt_res.end > stolen[1].start && ggtt_res.end <= stolen[1].end) |
| stolen[1].start = ggtt_res.end; |
| |
| /* Pick the larger of the two chunks */ |
| if (resource_size(&stolen[0]) > resource_size(&stolen[1])) |
| *dsm = stolen[0]; |
| else |
| *dsm = stolen[1]; |
| |
| if (stolen[0].start != stolen[1].start || |
| stolen[0].end != stolen[1].end) { |
| DRM_DEBUG_DRIVER("GTT within stolen memory at %pR\n", &ggtt_res); |
| DRM_DEBUG_DRIVER("Stolen memory adjusted to %pR\n", dsm); |
| } |
| } |
| |
| /* |
| * Verify that nothing else uses this physical address. Stolen |
| * memory should be reserved by the BIOS and hidden from the |
| * kernel. So if the region is already marked as busy, something |
| * is seriously wrong. |
| */ |
| r = devm_request_mem_region(dev_priv->drm.dev, dsm->start, |
| resource_size(dsm), |
| "Graphics Stolen Memory"); |
| if (r == NULL) { |
| /* |
| * One more attempt but this time requesting region from |
| * start + 1, as we have seen that this resolves the region |
| * conflict with the PCI Bus. |
| * This is a BIOS w/a: Some BIOS wrap stolen in the root |
| * PCI bus, but have an off-by-one error. Hence retry the |
| * reservation starting from 1 instead of 0. |
| * There's also BIOS with off-by-one on the other end. |
| */ |
| r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1, |
| resource_size(dsm) - 2, |
| "Graphics Stolen Memory"); |
| /* |
| * GEN3 firmware likes to smash pci bridges into the stolen |
| * range. Apparently this works. |
| */ |
| if (r == NULL && !IS_GEN3(dev_priv)) { |
| DRM_ERROR("conflict detected with stolen region: %pR\n", |
| dsm); |
| |
| return -EBUSY; |
| } |
| } |
| |
| return 0; |
| } |
| |
| void i915_gem_cleanup_stolen(struct drm_i915_private *dev_priv) |
| { |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return; |
| |
| drm_mm_takedown(&dev_priv->mm.stolen); |
| } |
| |
| static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(IS_GM45(dev_priv) ? |
| CTG_STOLEN_RESERVED : |
| ELK_STOLEN_RESERVED); |
| resource_size_t stolen_top = dev_priv->dsm.end + 1; |
| |
| DRM_DEBUG_DRIVER("%s_STOLEN_RESERVED = %08x\n", |
| IS_GM45(dev_priv) ? "CTG" : "ELK", reg_val); |
| |
| if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0) |
| return; |
| |
| /* |
| * Whether ILK really reuses the ELK register for this is unclear. |
| * Let's see if we catch anyone with this supposedly enabled on ILK. |
| */ |
| WARN(IS_GEN5(dev_priv), "ILK stolen reserved found? 0x%08x\n", reg_val); |
| |
| if (!(reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK)) |
| return; |
| |
| *base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16; |
| WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base); |
| |
| *size = stolen_top - *base; |
| } |
| |
| static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val); |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE)) |
| return; |
| |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| |
| 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); |
| } |
| } |
| |
| static void vlv_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| resource_size_t stolen_top = dev_priv->dsm.end + 1; |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val); |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE)) |
| return; |
| |
| switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) { |
| default: |
| MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK); |
| /* fall through */ |
| case GEN7_STOLEN_RESERVED_1M: |
| *size = 1024 * 1024; |
| break; |
| } |
| |
| /* |
| * On vlv, the ADDR_MASK portion is left as 0 and HW deduces the |
| * reserved location as (top - size). |
| */ |
| *base = stolen_top - *size; |
| } |
| |
| static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val); |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE)) |
| return; |
| |
| *base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK; |
| |
| 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); |
| } |
| } |
| |
| static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val); |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE)) |
| return; |
| |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| |
| 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); |
| } |
| } |
| |
| static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u32 reg_val = I915_READ(GEN6_STOLEN_RESERVED); |
| resource_size_t stolen_top = dev_priv->dsm.end + 1; |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = %08x\n", reg_val); |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ENABLE)) |
| return; |
| |
| if (!(reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK)) |
| return; |
| |
| *base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK; |
| *size = stolen_top - *base; |
| } |
| |
| static void icl_get_stolen_reserved(struct drm_i915_private *dev_priv, |
| resource_size_t *base, |
| resource_size_t *size) |
| { |
| u64 reg_val = I915_READ64(GEN6_STOLEN_RESERVED); |
| |
| DRM_DEBUG_DRIVER("GEN6_STOLEN_RESERVED = 0x%016llx\n", reg_val); |
| |
| *base = reg_val & GEN11_STOLEN_RESERVED_ADDR_MASK; |
| |
| 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); |
| } |
| } |
| |
| int i915_gem_init_stolen(struct drm_i915_private *dev_priv) |
| { |
| resource_size_t reserved_base, stolen_top; |
| resource_size_t reserved_total, reserved_size; |
| |
| mutex_init(&dev_priv->mm.stolen_lock); |
| |
| if (intel_vgpu_active(dev_priv)) { |
| DRM_INFO("iGVT-g active, disabling use of stolen memory\n"); |
| return 0; |
| } |
| |
| if (intel_vtd_active() && INTEL_GEN(dev_priv) < 8) { |
| DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
| return 0; |
| } |
| |
| if (resource_size(&intel_graphics_stolen_res) == 0) |
| return 0; |
| |
| dev_priv->dsm = intel_graphics_stolen_res; |
| |
| if (i915_adjust_stolen(dev_priv, &dev_priv->dsm)) |
| return 0; |
| |
| GEM_BUG_ON(dev_priv->dsm.start == 0); |
| GEM_BUG_ON(dev_priv->dsm.end <= dev_priv->dsm.start); |
| |
| stolen_top = dev_priv->dsm.end + 1; |
| reserved_base = stolen_top; |
| reserved_size = 0; |
| |
| switch (INTEL_GEN(dev_priv)) { |
| case 2: |
| case 3: |
| break; |
| case 4: |
| if (!IS_G4X(dev_priv)) |
| break; |
| /* fall through */ |
| case 5: |
| g4x_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| break; |
| case 6: |
| gen6_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| break; |
| case 7: |
| if (IS_VALLEYVIEW(dev_priv)) |
| vlv_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| else |
| gen7_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| break; |
| case 8: |
| case 9: |
| case 10: |
| if (IS_LP(dev_priv)) |
| chv_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| else |
| bdw_get_stolen_reserved(dev_priv, |
| &reserved_base, &reserved_size); |
| break; |
| case 11: |
| default: |
| icl_get_stolen_reserved(dev_priv, &reserved_base, |
| &reserved_size); |
| break; |
| } |
| |
| /* |
| * Our expectation is that the reserved space is at the top of the |
| * stolen region and *never* at the bottom. If we see !reserved_base, |
| * it likely means we failed to read the registers correctly. |
| */ |
| if (!reserved_base) { |
| DRM_ERROR("inconsistent reservation %pa + %pa; ignoring\n", |
| &reserved_base, &reserved_size); |
| reserved_base = stolen_top; |
| reserved_size = 0; |
| } |
| |
| dev_priv->dsm_reserved = |
| (struct resource) DEFINE_RES_MEM(reserved_base, reserved_size); |
| |
| if (!resource_contains(&dev_priv->dsm, &dev_priv->dsm_reserved)) { |
| DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n", |
| &dev_priv->dsm_reserved, &dev_priv->dsm); |
| return 0; |
| } |
| |
| /* 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_DRIVER("Memory reserved for graphics device: %lluK, usable: %lluK\n", |
| (u64)resource_size(&dev_priv->dsm) >> 10, |
| ((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10); |
| |
| dev_priv->stolen_usable_size = |
| resource_size(&dev_priv->dsm) - reserved_total; |
| |
| /* Basic memrange allocator for stolen space. */ |
| drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->stolen_usable_size); |
| |
| return 0; |
| } |
| |
| static struct sg_table * |
| i915_pages_create_for_stolen(struct drm_device *dev, |
| resource_size_t offset, resource_size_t size) |
| { |
| struct drm_i915_private *dev_priv = to_i915(dev); |
| struct sg_table *st; |
| struct scatterlist *sg; |
| |
| GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm))); |
| |
| /* 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 ERR_PTR(-ENOMEM); |
| |
| if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
| kfree(st); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| sg = st->sgl; |
| sg->offset = 0; |
| sg->length = size; |
| |
| sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset; |
| sg_dma_len(sg) = size; |
| |
| return st; |
| } |
| |
| static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
| { |
| struct sg_table *pages = |
| i915_pages_create_for_stolen(obj->base.dev, |
| obj->stolen->start, |
| obj->stolen->size); |
| if (IS_ERR(pages)) |
| return PTR_ERR(pages); |
| |
| __i915_gem_object_set_pages(obj, pages, obj->stolen->size); |
| |
| return 0; |
| } |
| |
| static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj, |
| struct sg_table *pages) |
| { |
| /* Should only be called from i915_gem_object_release_stolen() */ |
| sg_free_table(pages); |
| kfree(pages); |
| } |
| |
| static void |
| i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
| { |
| struct drm_i915_private *dev_priv = to_i915(obj->base.dev); |
| struct drm_mm_node *stolen = fetch_and_zero(&obj->stolen); |
| |
| GEM_BUG_ON(!stolen); |
| |
| __i915_gem_object_unpin_pages(obj); |
| |
| i915_gem_stolen_remove_node(dev_priv, stolen); |
| kfree(stolen); |
| } |
| |
| 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, |
| .release = i915_gem_object_release_stolen, |
| }; |
| |
| static struct drm_i915_gem_object * |
| _i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, |
| struct drm_mm_node *stolen) |
| { |
| struct drm_i915_gem_object *obj; |
| unsigned int cache_level; |
| |
| obj = i915_gem_object_alloc(dev_priv); |
| if (obj == NULL) |
| return NULL; |
| |
| drm_gem_private_object_init(&dev_priv->drm, &obj->base, stolen->size); |
| i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
| |
| obj->stolen = stolen; |
| obj->read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
| cache_level = HAS_LLC(dev_priv) ? I915_CACHE_LLC : I915_CACHE_NONE; |
| i915_gem_object_set_cache_coherency(obj, cache_level); |
| |
| if (i915_gem_object_pin_pages(obj)) |
| goto cleanup; |
| |
| return obj; |
| |
| cleanup: |
| i915_gem_object_free(obj); |
| return NULL; |
| } |
| |
| struct drm_i915_gem_object * |
| i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, |
| resource_size_t size) |
| { |
| struct drm_i915_gem_object *obj; |
| struct drm_mm_node *stolen; |
| int ret; |
| |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return NULL; |
| |
| if (size == 0) |
| return NULL; |
| |
| stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
| if (!stolen) |
| return NULL; |
| |
| ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096); |
| if (ret) { |
| kfree(stolen); |
| return NULL; |
| } |
| |
| obj = _i915_gem_object_create_stolen(dev_priv, stolen); |
| if (obj) |
| return obj; |
| |
| i915_gem_stolen_remove_node(dev_priv, stolen); |
| kfree(stolen); |
| return NULL; |
| } |
| |
| struct drm_i915_gem_object * |
| i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv, |
| resource_size_t stolen_offset, |
| resource_size_t gtt_offset, |
| resource_size_t size) |
| { |
| struct i915_ggtt *ggtt = &dev_priv->ggtt; |
| struct drm_i915_gem_object *obj; |
| struct drm_mm_node *stolen; |
| struct i915_vma *vma; |
| int ret; |
| |
| if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| return NULL; |
| |
| lockdep_assert_held(&dev_priv->drm.struct_mutex); |
| |
| DRM_DEBUG_DRIVER("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n", |
| &stolen_offset, >t_offset, &size); |
| |
| /* KISS and expect everything to be page-aligned */ |
| if (WARN_ON(size == 0) || |
| WARN_ON(!IS_ALIGNED(size, I915_GTT_PAGE_SIZE)) || |
| WARN_ON(!IS_ALIGNED(stolen_offset, I915_GTT_MIN_ALIGNMENT))) |
| return NULL; |
| |
| stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
| if (!stolen) |
| return NULL; |
| |
| 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_DRIVER("failed to allocate stolen space\n"); |
| kfree(stolen); |
| return NULL; |
| } |
| |
| obj = _i915_gem_object_create_stolen(dev_priv, stolen); |
| if (obj == NULL) { |
| DRM_DEBUG_DRIVER("failed to allocate stolen object\n"); |
| i915_gem_stolen_remove_node(dev_priv, stolen); |
| kfree(stolen); |
| return NULL; |
| } |
| |
| /* Some objects just need physical mem from stolen space */ |
| if (gtt_offset == I915_GTT_OFFSET_NONE) |
| return obj; |
| |
| ret = i915_gem_object_pin_pages(obj); |
| if (ret) |
| goto err; |
| |
| vma = i915_vma_instance(obj, &ggtt->vm, NULL); |
| if (IS_ERR(vma)) { |
| ret = PTR_ERR(vma); |
| goto err_pages; |
| } |
| |
| /* 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. |
| */ |
| ret = i915_gem_gtt_reserve(&ggtt->vm, &vma->node, |
| size, gtt_offset, obj->cache_level, |
| 0); |
| if (ret) { |
| DRM_DEBUG_DRIVER("failed to allocate stolen GTT space\n"); |
| goto err_pages; |
| } |
| |
| GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); |
| |
| vma->pages = obj->mm.pages; |
| vma->flags |= I915_VMA_GLOBAL_BIND; |
| __i915_vma_set_map_and_fenceable(vma); |
| list_move_tail(&vma->vm_link, &ggtt->vm.inactive_list); |
| |
| spin_lock(&dev_priv->mm.obj_lock); |
| list_move_tail(&obj->mm.link, &dev_priv->mm.bound_list); |
| obj->bind_count++; |
| spin_unlock(&dev_priv->mm.obj_lock); |
| |
| return obj; |
| |
| err_pages: |
| i915_gem_object_unpin_pages(obj); |
| err: |
| i915_gem_object_put(obj); |
| return NULL; |
| } |