diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 517 |
1 files changed, 495 insertions, 22 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 1f7b4caefb6e..d3c3b5b15824 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -30,6 +30,8 @@ #define GEN6_PPGTT_PD_ENTRIES 512 #define I915_PPGTT_PT_ENTRIES (PAGE_SIZE / sizeof(gen6_gtt_pte_t)) +typedef uint64_t gen8_gtt_pte_t; +typedef gen8_gtt_pte_t gen8_ppgtt_pde_t; /* PPGTT stuff */ #define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0)) @@ -55,7 +57,44 @@ #define HSW_WB_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x2) #define HSW_WB_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x3) #define HSW_WB_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0xb) +#define HSW_WB_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x8) #define HSW_WT_ELLC_LLC_AGE0 HSW_CACHEABILITY_CONTROL(0x6) +#define HSW_WT_ELLC_LLC_AGE3 HSW_CACHEABILITY_CONTROL(0x7) + +#define GEN8_PTES_PER_PAGE (PAGE_SIZE / sizeof(gen8_gtt_pte_t)) +#define GEN8_PDES_PER_PAGE (PAGE_SIZE / sizeof(gen8_ppgtt_pde_t)) +#define GEN8_LEGACY_PDPS 4 + +#define PPAT_UNCACHED_INDEX (_PAGE_PWT | _PAGE_PCD) +#define PPAT_CACHED_PDE_INDEX 0 /* WB LLC */ +#define PPAT_CACHED_INDEX _PAGE_PAT /* WB LLCeLLC */ +#define PPAT_DISPLAY_ELLC_INDEX _PAGE_PCD /* WT eLLC */ + +static inline gen8_gtt_pte_t gen8_pte_encode(dma_addr_t addr, + enum i915_cache_level level, + bool valid) +{ + gen8_gtt_pte_t pte = valid ? _PAGE_PRESENT | _PAGE_RW : 0; + pte |= addr; + if (level != I915_CACHE_NONE) + pte |= PPAT_CACHED_INDEX; + else + pte |= PPAT_UNCACHED_INDEX; + return pte; +} + +static inline gen8_ppgtt_pde_t gen8_pde_encode(struct drm_device *dev, + dma_addr_t addr, + enum i915_cache_level level) +{ + gen8_ppgtt_pde_t pde = _PAGE_PRESENT | _PAGE_RW; + pde |= addr; + if (level != I915_CACHE_NONE) + pde |= PPAT_CACHED_PDE_INDEX; + else + pde |= PPAT_UNCACHED_INDEX; + return pde; +} static gen6_gtt_pte_t snb_pte_encode(dma_addr_t addr, enum i915_cache_level level, @@ -148,16 +187,267 @@ static gen6_gtt_pte_t iris_pte_encode(dma_addr_t addr, case I915_CACHE_NONE: break; case I915_CACHE_WT: - pte |= HSW_WT_ELLC_LLC_AGE0; + pte |= HSW_WT_ELLC_LLC_AGE3; break; default: - pte |= HSW_WB_ELLC_LLC_AGE0; + pte |= HSW_WB_ELLC_LLC_AGE3; break; } return pte; } +/* Broadwell Page Directory Pointer Descriptors */ +static int gen8_write_pdp(struct intel_ring_buffer *ring, unsigned entry, + uint64_t val) +{ + int ret; + + BUG_ON(entry >= 4); + + ret = intel_ring_begin(ring, 6); + if (ret) + return ret; + + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, GEN8_RING_PDP_UDW(ring, entry)); + intel_ring_emit(ring, (u32)(val >> 32)); + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, GEN8_RING_PDP_LDW(ring, entry)); + intel_ring_emit(ring, (u32)(val)); + intel_ring_advance(ring); + + return 0; +} + +static int gen8_ppgtt_enable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_ring_buffer *ring; + struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt; + int i, j, ret; + + /* bit of a hack to find the actual last used pd */ + int used_pd = ppgtt->num_pd_entries / GEN8_PDES_PER_PAGE; + + for_each_ring(ring, dev_priv, j) { + I915_WRITE(RING_MODE_GEN7(ring), + _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE)); + } + + for (i = used_pd - 1; i >= 0; i--) { + dma_addr_t addr = ppgtt->pd_dma_addr[i]; + for_each_ring(ring, dev_priv, j) { + ret = gen8_write_pdp(ring, i, addr); + if (ret) + return ret; + } + } + return 0; +} + +static void gen8_ppgtt_clear_range(struct i915_address_space *vm, + unsigned first_entry, + unsigned num_entries, + bool use_scratch) +{ + struct i915_hw_ppgtt *ppgtt = + container_of(vm, struct i915_hw_ppgtt, base); + gen8_gtt_pte_t *pt_vaddr, scratch_pte; + unsigned act_pt = first_entry / GEN8_PTES_PER_PAGE; + unsigned first_pte = first_entry % GEN8_PTES_PER_PAGE; + unsigned last_pte, i; + + scratch_pte = gen8_pte_encode(ppgtt->base.scratch.addr, + I915_CACHE_LLC, use_scratch); + + while (num_entries) { + struct page *page_table = &ppgtt->gen8_pt_pages[act_pt]; + + last_pte = first_pte + num_entries; + if (last_pte > GEN8_PTES_PER_PAGE) + last_pte = GEN8_PTES_PER_PAGE; + + pt_vaddr = kmap_atomic(page_table); + + for (i = first_pte; i < last_pte; i++) + pt_vaddr[i] = scratch_pte; + + kunmap_atomic(pt_vaddr); + + num_entries -= last_pte - first_pte; + first_pte = 0; + act_pt++; + } +} + +static void gen8_ppgtt_insert_entries(struct i915_address_space *vm, + struct sg_table *pages, + unsigned first_entry, + enum i915_cache_level cache_level) +{ + struct i915_hw_ppgtt *ppgtt = + container_of(vm, struct i915_hw_ppgtt, base); + gen8_gtt_pte_t *pt_vaddr; + unsigned act_pt = first_entry / GEN8_PTES_PER_PAGE; + unsigned act_pte = first_entry % GEN8_PTES_PER_PAGE; + struct sg_page_iter sg_iter; + + pt_vaddr = kmap_atomic(&ppgtt->gen8_pt_pages[act_pt]); + for_each_sg_page(pages->sgl, &sg_iter, pages->nents, 0) { + dma_addr_t page_addr; + + page_addr = sg_dma_address(sg_iter.sg) + + (sg_iter.sg_pgoffset << PAGE_SHIFT); + pt_vaddr[act_pte] = gen8_pte_encode(page_addr, cache_level, + true); + if (++act_pte == GEN8_PTES_PER_PAGE) { + kunmap_atomic(pt_vaddr); + act_pt++; + pt_vaddr = kmap_atomic(&ppgtt->gen8_pt_pages[act_pt]); + act_pte = 0; + + } + } + kunmap_atomic(pt_vaddr); +} + +static void gen8_ppgtt_cleanup(struct i915_address_space *vm) +{ + struct i915_hw_ppgtt *ppgtt = + container_of(vm, struct i915_hw_ppgtt, base); + int i, j; + + for (i = 0; i < ppgtt->num_pd_pages ; i++) { + if (ppgtt->pd_dma_addr[i]) { + pci_unmap_page(ppgtt->base.dev->pdev, + ppgtt->pd_dma_addr[i], + PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + + for (j = 0; j < GEN8_PDES_PER_PAGE; j++) { + dma_addr_t addr = ppgtt->gen8_pt_dma_addr[i][j]; + if (addr) + pci_unmap_page(ppgtt->base.dev->pdev, + addr, + PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL); + + } + } + kfree(ppgtt->gen8_pt_dma_addr[i]); + } + + __free_pages(ppgtt->gen8_pt_pages, get_order(ppgtt->num_pt_pages << PAGE_SHIFT)); + __free_pages(ppgtt->pd_pages, get_order(ppgtt->num_pd_pages << PAGE_SHIFT)); +} + +/** + * GEN8 legacy ppgtt programming is accomplished through 4 PDP registers with a + * net effect resembling a 2-level page table in normal x86 terms. Each PDP + * represents 1GB of memory + * 4 * 512 * 512 * 4096 = 4GB legacy 32b address space. + * + * TODO: Do something with the size parameter + **/ +static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt, uint64_t size) +{ + struct page *pt_pages; + int i, j, ret = -ENOMEM; + const int max_pdp = DIV_ROUND_UP(size, 1 << 30); + const int num_pt_pages = GEN8_PDES_PER_PAGE * max_pdp; + + if (size % (1<<30)) + DRM_INFO("Pages will be wasted unless GTT size (%llu) is divisible by 1GB\n", size); + + /* FIXME: split allocation into smaller pieces. For now we only ever do + * this once, but with full PPGTT, the multiple contiguous allocations + * will be bad. + */ + ppgtt->pd_pages = alloc_pages(GFP_KERNEL, get_order(max_pdp << PAGE_SHIFT)); + if (!ppgtt->pd_pages) + return -ENOMEM; + + pt_pages = alloc_pages(GFP_KERNEL, get_order(num_pt_pages << PAGE_SHIFT)); + if (!pt_pages) { + __free_pages(ppgtt->pd_pages, get_order(max_pdp << PAGE_SHIFT)); + return -ENOMEM; + } + + ppgtt->gen8_pt_pages = pt_pages; + ppgtt->num_pd_pages = 1 << get_order(max_pdp << PAGE_SHIFT); + ppgtt->num_pt_pages = 1 << get_order(num_pt_pages << PAGE_SHIFT); + ppgtt->num_pd_entries = max_pdp * GEN8_PDES_PER_PAGE; + ppgtt->enable = gen8_ppgtt_enable; + ppgtt->base.clear_range = gen8_ppgtt_clear_range; + ppgtt->base.insert_entries = gen8_ppgtt_insert_entries; + ppgtt->base.cleanup = gen8_ppgtt_cleanup; + + BUG_ON(ppgtt->num_pd_pages > GEN8_LEGACY_PDPS); + + /* + * - Create a mapping for the page directories. + * - For each page directory: + * allocate space for page table mappings. + * map each page table + */ + for (i = 0; i < max_pdp; i++) { + dma_addr_t temp; + temp = pci_map_page(ppgtt->base.dev->pdev, + &ppgtt->pd_pages[i], 0, + PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(ppgtt->base.dev->pdev, temp)) + goto err_out; + + ppgtt->pd_dma_addr[i] = temp; + + ppgtt->gen8_pt_dma_addr[i] = kmalloc(sizeof(dma_addr_t) * GEN8_PDES_PER_PAGE, GFP_KERNEL); + if (!ppgtt->gen8_pt_dma_addr[i]) + goto err_out; + + for (j = 0; j < GEN8_PDES_PER_PAGE; j++) { + struct page *p = &pt_pages[i * GEN8_PDES_PER_PAGE + j]; + temp = pci_map_page(ppgtt->base.dev->pdev, + p, 0, PAGE_SIZE, + PCI_DMA_BIDIRECTIONAL); + + if (pci_dma_mapping_error(ppgtt->base.dev->pdev, temp)) + goto err_out; + + ppgtt->gen8_pt_dma_addr[i][j] = temp; + } + } + + /* For now, the PPGTT helper functions all require that the PDEs are + * plugged in correctly. So we do that now/here. For aliasing PPGTT, we + * will never need to touch the PDEs again */ + for (i = 0; i < max_pdp; i++) { + gen8_ppgtt_pde_t *pd_vaddr; + pd_vaddr = kmap_atomic(&ppgtt->pd_pages[i]); + for (j = 0; j < GEN8_PDES_PER_PAGE; j++) { + dma_addr_t addr = ppgtt->gen8_pt_dma_addr[i][j]; + pd_vaddr[j] = gen8_pde_encode(ppgtt->base.dev, addr, + I915_CACHE_LLC); + } + kunmap_atomic(pd_vaddr); + } + + ppgtt->base.clear_range(&ppgtt->base, 0, + ppgtt->num_pd_entries * GEN8_PTES_PER_PAGE, + true); + + DRM_DEBUG_DRIVER("Allocated %d pages for page directories (%d wasted)\n", + ppgtt->num_pd_pages, ppgtt->num_pd_pages - max_pdp); + DRM_DEBUG_DRIVER("Allocated %d pages for page tables (%lld wasted)\n", + ppgtt->num_pt_pages, + (ppgtt->num_pt_pages - num_pt_pages) + + size % (1<<30)); + return 0; + +err_out: + ppgtt->base.cleanup(&ppgtt->base); + return ret; +} + static void gen6_write_pdes(struct i915_hw_ppgtt *ppgtt) { struct drm_i915_private *dev_priv = ppgtt->base.dev->dev_private; @@ -342,7 +632,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->base.insert_entries = gen6_ppgtt_insert_entries; ppgtt->base.cleanup = gen6_ppgtt_cleanup; ppgtt->base.scratch = dev_priv->gtt.base.scratch; - ppgtt->pt_pages = kzalloc(sizeof(struct page *)*ppgtt->num_pd_entries, + ppgtt->pt_pages = kcalloc(ppgtt->num_pd_entries, sizeof(struct page *), GFP_KERNEL); if (!ppgtt->pt_pages) return -ENOMEM; @@ -353,7 +643,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt) goto err_pt_alloc; } - ppgtt->pt_dma_addr = kzalloc(sizeof(dma_addr_t) *ppgtt->num_pd_entries, + ppgtt->pt_dma_addr = kcalloc(ppgtt->num_pd_entries, sizeof(dma_addr_t), GFP_KERNEL); if (!ppgtt->pt_dma_addr) goto err_pt_alloc; @@ -410,6 +700,8 @@ static int i915_gem_init_aliasing_ppgtt(struct drm_device *dev) if (INTEL_INFO(dev)->gen < 8) ret = gen6_ppgtt_init(ppgtt); + else if (IS_GEN8(dev)) + ret = gen8_ppgtt_init(ppgtt, dev_priv->gtt.base.total); else BUG(); @@ -573,6 +865,55 @@ int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj) return 0; } +static inline void gen8_set_pte(void __iomem *addr, gen8_gtt_pte_t pte) +{ +#ifdef writeq + writeq(pte, addr); +#else + iowrite32((u32)pte, addr); + iowrite32(pte >> 32, addr + 4); +#endif +} + +static void gen8_ggtt_insert_entries(struct i915_address_space *vm, + struct sg_table *st, + unsigned int first_entry, + enum i915_cache_level level) +{ + struct drm_i915_private *dev_priv = vm->dev->dev_private; + gen8_gtt_pte_t __iomem *gtt_entries = + (gen8_gtt_pte_t __iomem *)dev_priv->gtt.gsm + first_entry; + int i = 0; + struct sg_page_iter sg_iter; + dma_addr_t addr; + + for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) { + addr = sg_dma_address(sg_iter.sg) + + (sg_iter.sg_pgoffset << PAGE_SHIFT); + gen8_set_pte(>t_entries[i], + gen8_pte_encode(addr, level, true)); + i++; + } + + /* + * XXX: This serves as a posting read to make sure that the PTE has + * actually been updated. There is some concern that even though + * registers and PTEs are within the same BAR that they are potentially + * of NUMA access patterns. Therefore, even with the way we assume + * hardware should work, we must keep this posting read for paranoia. + */ + if (i != 0) + WARN_ON(readq(>t_entries[i-1]) + != gen8_pte_encode(addr, level, true)); + + /* This next bit makes the above posting read even more important. We + * want to flush the TLBs only after we're certain all the PTE updates + * have finished. + */ + I915_WRITE(GFX_FLSH_CNTL_GEN6, GFX_FLSH_CNTL_EN); + POSTING_READ(GFX_FLSH_CNTL_GEN6); +} + /* * Binds an object into the global gtt with the specified cache level. The object * will be accessible to the GPU via commands whose operands reference offsets @@ -615,6 +956,30 @@ static void gen6_ggtt_insert_entries(struct i915_address_space *vm, POSTING_READ(GFX_FLSH_CNTL_GEN6); } +static void gen8_ggtt_clear_range(struct i915_address_space *vm, + unsigned int first_entry, + unsigned int num_entries, + bool use_scratch) +{ + struct drm_i915_private *dev_priv = vm->dev->dev_private; + gen8_gtt_pte_t scratch_pte, __iomem *gtt_base = + (gen8_gtt_pte_t __iomem *) dev_priv->gtt.gsm + first_entry; + const int max_entries = gtt_total_entries(dev_priv->gtt) - first_entry; + int i; + + if (WARN(num_entries > max_entries, + "First entry = %d; Num entries = %d (max=%d)\n", + first_entry, num_entries, max_entries)) + num_entries = max_entries; + + scratch_pte = gen8_pte_encode(vm->scratch.addr, + I915_CACHE_LLC, + use_scratch); + for (i = 0; i < num_entries; i++) + gen8_set_pte(>t_base[i], scratch_pte); + readl(gtt_base); +} + static void gen6_ggtt_clear_range(struct i915_address_space *vm, unsigned int first_entry, unsigned int num_entries, @@ -638,7 +1003,6 @@ static void gen6_ggtt_clear_range(struct i915_address_space *vm, readl(gtt_base); } - static void i915_ggtt_insert_entries(struct i915_address_space *vm, struct sg_table *st, unsigned int pg_start, @@ -720,6 +1084,7 @@ static void i915_gtt_color_adjust(struct drm_mm_node *node, *end -= 4096; } } + void i915_gem_setup_global_gtt(struct drm_device *dev, unsigned long start, unsigned long mappable_end, @@ -817,7 +1182,8 @@ void i915_gem_init_global_gtt(struct drm_device *dev) DRM_ERROR("Aliased PPGTT setup failed %d\n", ret); drm_mm_takedown(&dev_priv->gtt.base.mm); - gtt_size += GEN6_PPGTT_PD_ENTRIES * PAGE_SIZE; + if (INTEL_INFO(dev)->gen < 8) + gtt_size += GEN6_PPGTT_PD_ENTRIES*PAGE_SIZE; } i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size); } @@ -867,6 +1233,20 @@ static inline unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl) return snb_gmch_ctl << 20; } +static inline unsigned int gen8_get_total_gtt_size(u16 bdw_gmch_ctl) +{ + bdw_gmch_ctl >>= BDW_GMCH_GGMS_SHIFT; + bdw_gmch_ctl &= BDW_GMCH_GGMS_MASK; + if (bdw_gmch_ctl) + bdw_gmch_ctl = 1 << bdw_gmch_ctl; + if (bdw_gmch_ctl > 4) { + WARN_ON(!i915_preliminary_hw_support); + return 4<<20; + } + + return bdw_gmch_ctl << 20; +} + static inline size_t gen6_get_stolen_size(u16 snb_gmch_ctl) { snb_gmch_ctl >>= SNB_GMCH_GMS_SHIFT; @@ -874,6 +1254,108 @@ static inline size_t gen6_get_stolen_size(u16 snb_gmch_ctl) return snb_gmch_ctl << 25; /* 32 MB units */ } +static inline size_t gen8_get_stolen_size(u16 bdw_gmch_ctl) +{ + bdw_gmch_ctl >>= BDW_GMCH_GMS_SHIFT; + bdw_gmch_ctl &= BDW_GMCH_GMS_MASK; + return bdw_gmch_ctl << 25; /* 32 MB units */ +} + +static int ggtt_probe_common(struct drm_device *dev, + size_t gtt_size) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + phys_addr_t gtt_bus_addr; + int ret; + + /* For Modern GENs the PTEs and register space are split in the BAR */ + gtt_bus_addr = pci_resource_start(dev->pdev, 0) + + (pci_resource_len(dev->pdev, 0) / 2); + + dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr, gtt_size); + if (!dev_priv->gtt.gsm) { + DRM_ERROR("Failed to map the gtt page table\n"); + return -ENOMEM; + } + + ret = setup_scratch_page(dev); + if (ret) { + DRM_ERROR("Scratch setup failed\n"); + /* iounmap will also get called at remove, but meh */ + iounmap(dev_priv->gtt.gsm); + } + + return ret; +} + +/* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability + * bits. When using advanced contexts each context stores its own PAT, but + * writing this data shouldn't be harmful even in those cases. */ +static void gen8_setup_private_ppat(struct drm_i915_private *dev_priv) +{ +#define GEN8_PPAT_UC (0<<0) +#define GEN8_PPAT_WC (1<<0) +#define GEN8_PPAT_WT (2<<0) +#define GEN8_PPAT_WB (3<<0) +#define GEN8_PPAT_ELLC_OVERRIDE (0<<2) +/* FIXME(BDW): Bspec is completely confused about cache control bits. */ +#define GEN8_PPAT_LLC (1<<2) +#define GEN8_PPAT_LLCELLC (2<<2) +#define GEN8_PPAT_LLCeLLC (3<<2) +#define GEN8_PPAT_AGE(x) (x<<4) +#define GEN8_PPAT(i, x) ((uint64_t) (x) << ((i) * 8)) + uint64_t pat; + + pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC) | /* for normal objects, no eLLC */ + GEN8_PPAT(1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC) | /* for something pointing to ptes? */ + GEN8_PPAT(2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC) | /* for scanout with eLLC */ + GEN8_PPAT(3, GEN8_PPAT_UC) | /* Uncached objects, mostly for scanout */ + GEN8_PPAT(4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)) | + GEN8_PPAT(5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)) | + GEN8_PPAT(6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)) | + GEN8_PPAT(7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3)); + + /* XXX: spec defines this as 2 distinct registers. It's unclear if a 64b + * write would work. */ + I915_WRITE(GEN8_PRIVATE_PAT, pat); + I915_WRITE(GEN8_PRIVATE_PAT + 4, pat >> 32); +} + +static int gen8_gmch_probe(struct drm_device *dev, + size_t *gtt_total, + size_t *stolen, + phys_addr_t *mappable_base, + unsigned long *mappable_end) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + unsigned int gtt_size; + u16 snb_gmch_ctl; + int ret; + + /* TODO: We're not aware of mappable constraints on gen8 yet */ + *mappable_base = pci_resource_start(dev->pdev, 2); + *mappable_end = pci_resource_len(dev->pdev, 2); + + if (!pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(39))) + pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(39)); + + pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); + + *stolen = gen8_get_stolen_size(snb_gmch_ctl); + + gtt_size = gen8_get_total_gtt_size(snb_gmch_ctl); + *gtt_total = (gtt_size / sizeof(gen8_gtt_pte_t)) << PAGE_SHIFT; + + gen8_setup_private_ppat(dev_priv); + + ret = ggtt_probe_common(dev, gtt_size); + + dev_priv->gtt.base.clear_range = gen8_ggtt_clear_range; + dev_priv->gtt.base.insert_entries = gen8_ggtt_insert_entries; + + return ret; +} + static int gen6_gmch_probe(struct drm_device *dev, size_t *gtt_total, size_t *stolen, @@ -881,7 +1363,6 @@ static int gen6_gmch_probe(struct drm_device *dev, unsigned long *mappable_end) { struct drm_i915_private *dev_priv = dev->dev_private; - phys_addr_t gtt_bus_addr; unsigned int gtt_size; u16 snb_gmch_ctl; int ret; @@ -901,24 +1382,13 @@ static int gen6_gmch_probe(struct drm_device *dev, if (!pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(40))) pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(40)); pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); - gtt_size = gen6_get_total_gtt_size(snb_gmch_ctl); *stolen = gen6_get_stolen_size(snb_gmch_ctl); - *gtt_total = (gtt_size / sizeof(gen6_gtt_pte_t)) << PAGE_SHIFT; - - /* For Modern GENs the PTEs and register space are split in the BAR */ - gtt_bus_addr = pci_resource_start(dev->pdev, 0) + - (pci_resource_len(dev->pdev, 0) / 2); - dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr, gtt_size); - if (!dev_priv->gtt.gsm) { - DRM_ERROR("Failed to map the gtt page table\n"); - return -ENOMEM; - } + gtt_size = gen6_get_total_gtt_size(snb_gmch_ctl); + *gtt_total = (gtt_size / sizeof(gen6_gtt_pte_t)) << PAGE_SHIFT; - ret = setup_scratch_page(dev); - if (ret) - DRM_ERROR("Scratch setup failed\n"); + ret = ggtt_probe_common(dev, gtt_size); dev_priv->gtt.base.clear_range = gen6_ggtt_clear_range; dev_priv->gtt.base.insert_entries = gen6_ggtt_insert_entries; @@ -972,7 +1442,7 @@ int i915_gem_gtt_init(struct drm_device *dev) if (INTEL_INFO(dev)->gen <= 5) { gtt->gtt_probe = i915_gmch_probe; gtt->base.cleanup = i915_gmch_remove; - } else { + } else if (INTEL_INFO(dev)->gen < 8) { gtt->gtt_probe = gen6_gmch_probe; gtt->base.cleanup = gen6_gmch_remove; if (IS_HASWELL(dev) && dev_priv->ellc_size) @@ -985,6 +1455,9 @@ int i915_gem_gtt_init(struct drm_device *dev) gtt->base.pte_encode = ivb_pte_encode; else gtt->base.pte_encode = snb_pte_encode; + } else { + dev_priv->gtt.gtt_probe = gen8_gmch_probe; + dev_priv->gtt.base.cleanup = gen6_gmch_remove; } ret = gtt->gtt_probe(dev, >t->base.total, >t->stolen_size, |