diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_region_lmem.c')
-rw-r--r-- | drivers/gpu/drm/i915/gt/intel_region_lmem.c | 105 |
1 files changed, 96 insertions, 9 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 60393ce5614d..be6f2c8f5184 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -26,12 +26,12 @@ static int init_fake_lmem_bar(struct intel_memory_region *mem) if (ret) return ret; - mem->remap_addr = dma_map_resource(&i915->drm.pdev->dev, + mem->remap_addr = dma_map_resource(i915->drm.dev, mem->region.start, mem->fake_mappable.size, PCI_DMA_BIDIRECTIONAL, DMA_ATTR_FORCE_CONTIGUOUS); - if (dma_mapping_error(&i915->drm.pdev->dev, mem->remap_addr)) { + if (dma_mapping_error(i915->drm.dev, mem->remap_addr)) { drm_mm_remove_node(&mem->fake_mappable); return -EINVAL; } @@ -56,7 +56,7 @@ static void release_fake_lmem_bar(struct intel_memory_region *mem) drm_mm_remove_node(&mem->fake_mappable); - dma_unmap_resource(&mem->i915->drm.pdev->dev, + dma_unmap_resource(mem->i915->drm.dev, mem->remap_addr, mem->fake_mappable.size, PCI_DMA_BIDIRECTIONAL, @@ -90,8 +90,6 @@ region_lmem_init(struct intel_memory_region *mem) if (ret) io_mapping_fini(&mem->iomap); - intel_memory_region_set_name(mem, "local"); - return ret; } @@ -102,20 +100,26 @@ static const struct intel_memory_region_ops intel_region_lmem_ops = { }; struct intel_memory_region * -intel_setup_fake_lmem(struct drm_i915_private *i915) +intel_gt_setup_fake_lmem(struct intel_gt *gt) { - struct pci_dev *pdev = i915->drm.pdev; + struct drm_i915_private *i915 = gt->i915; + struct pci_dev *pdev = to_pci_dev(i915->drm.dev); struct intel_memory_region *mem; resource_size_t mappable_end; resource_size_t io_start; resource_size_t start; + if (!HAS_LMEM(i915)) + return ERR_PTR(-ENODEV); + + if (!i915->params.fake_lmem_start) + return ERR_PTR(-ENODEV); + GEM_BUG_ON(i915_ggtt_has_aperture(&i915->ggtt)); - GEM_BUG_ON(!i915->params.fake_lmem_start); /* Your mappable aperture belongs to me now! */ mappable_end = pci_resource_len(pdev, 2); - io_start = pci_resource_start(pdev, 2), + io_start = pci_resource_start(pdev, 2); start = i915->params.fake_lmem_start; mem = intel_memory_region_create(i915, @@ -136,3 +140,86 @@ intel_setup_fake_lmem(struct drm_i915_private *i915) return mem; } + +static bool get_legacy_lowmem_region(struct intel_uncore *uncore, + u64 *start, u32 *size) +{ + if (!IS_DG1_REVID(uncore->i915, DG1_REVID_A0, DG1_REVID_B0)) + return false; + + *start = 0; + *size = SZ_1M; + + drm_dbg(&uncore->i915->drm, "LMEM: reserved legacy low-memory [0x%llx-0x%llx]\n", + *start, *start + *size); + + return true; +} + +static int reserve_lowmem_region(struct intel_uncore *uncore, + struct intel_memory_region *mem) +{ + u64 reserve_start; + u32 reserve_size; + int ret; + + if (!get_legacy_lowmem_region(uncore, &reserve_start, &reserve_size)) + return 0; + + ret = intel_memory_region_reserve(mem, reserve_start, reserve_size); + if (ret) + drm_err(&uncore->i915->drm, "LMEM: reserving low memory region failed\n"); + + return ret; +} + +static struct intel_memory_region *setup_lmem(struct intel_gt *gt) +{ + struct drm_i915_private *i915 = gt->i915; + struct intel_uncore *uncore = gt->uncore; + struct pci_dev *pdev = i915->drm.pdev; + struct intel_memory_region *mem; + resource_size_t io_start; + resource_size_t lmem_size; + int err; + + if (!IS_DGFX(i915)) + return ERR_PTR(-ENODEV); + + /* Stolen starts from GSMBASE on DG1 */ + lmem_size = intel_uncore_read64(uncore, GEN12_GSMBASE); + + io_start = pci_resource_start(pdev, 2); + if (GEM_WARN_ON(lmem_size > pci_resource_len(pdev, 2))) + return ERR_PTR(-ENODEV); + + mem = intel_memory_region_create(i915, + 0, + lmem_size, + I915_GTT_PAGE_SIZE_4K, + io_start, + &intel_region_lmem_ops); + if (IS_ERR(mem)) + return mem; + + err = reserve_lowmem_region(uncore, mem); + if (err) + goto err_region_put; + + drm_dbg(&i915->drm, "Local memory: %pR\n", &mem->region); + drm_dbg(&i915->drm, "Local memory IO start: %pa\n", + &mem->io_start); + drm_info(&i915->drm, "Local memory available: %pa\n", + &lmem_size); + + return mem; + +err_region_put: + intel_memory_region_put(mem); + return ERR_PTR(err); +} + +struct intel_memory_region *intel_gt_setup_lmem(struct intel_gt *gt) +{ + return setup_lmem(gt); +} |