diff options
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 41 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 139 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 16 |
4 files changed, 203 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index dfef9569f2a1..039fbf4fae10 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1196,22 +1196,39 @@ static int i915_load_gem_init(struct drm_device *dev) /* Basic memrange allocator for stolen space */ drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size); - /* Let GEM Manage all of the aperture. - * - * However, leave one page at the end still bound to the scratch page. - * There are a number of places where the hardware apparently - * prefetches past the end of the object, and we've seen multiple - * hangs with the GPU head pointer stuck in a batchbuffer bound - * at the last page of the aperture. One page should be enough to - * keep any prefetching inside of the aperture. - */ - i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE); + if (HAS_ALIASING_PPGTT(dev)) { + /* PPGTT pdes are stolen from global gtt ptes, so shrink the + * aperture accordingly when using aliasing ppgtt. */ + gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE; + /* For paranoia keep the guard page in between. */ + gtt_size -= PAGE_SIZE; + + i915_gem_do_init(dev, 0, mappable_size, gtt_size); + + ret = i915_gem_init_aliasing_ppgtt(dev); + if (ret) + return ret; + } else { + /* Let GEM Manage all of the aperture. + * + * However, leave one page at the end still bound to the scratch + * page. There are a number of places where the hardware + * apparently prefetches past the end of the object, and we've + * seen multiple hangs with the GPU head pointer stuck in a + * batchbuffer bound at the last page of the aperture. One page + * should be enough to keep any prefetching inside of the + * aperture. + */ + i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE); + } mutex_lock(&dev->struct_mutex); ret = i915_gem_init_hw(dev); mutex_unlock(&dev->struct_mutex); - if (ret) + if (ret) { + i915_gem_cleanup_aliasing_ppgtt(dev); return ret; + } /* Try to set up FBC with a reasonable compressed buffer size */ if (I915_HAS_FBC(dev) && i915_powersave) { @@ -1298,6 +1315,7 @@ cleanup_gem: mutex_lock(&dev->struct_mutex); i915_gem_cleanup_ringbuffer(dev); mutex_unlock(&dev->struct_mutex); + i915_gem_cleanup_aliasing_ppgtt(dev); cleanup_vga_switcheroo: vga_switcheroo_unregister_client(dev->pdev); cleanup_vga_client: @@ -2184,6 +2202,7 @@ int i915_driver_unload(struct drm_device *dev) i915_gem_free_all_phys_object(dev); i915_gem_cleanup_ringbuffer(dev); mutex_unlock(&dev->struct_mutex); + i915_gem_cleanup_aliasing_ppgtt(dev); if (I915_HAS_FBC(dev) && i915_powersave) i915_cleanup_compression(dev); drm_mm_takedown(&dev_priv->mm.stolen); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 28740bc0200a..03a9e49fe93d 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -258,6 +258,16 @@ struct intel_device_info { u8 has_llc:1; }; +#define I915_PPGTT_PD_ENTRIES 512 +#define I915_PPGTT_PT_ENTRIES 1024 +struct i915_hw_ppgtt { + unsigned num_pd_entries; + struct page **pt_pages; + uint32_t pd_offset; + dma_addr_t *pt_dma_addr; + dma_addr_t scratch_page_dma_addr; +}; + enum no_fbc_reason { FBC_NO_OUTPUT, /* no outputs enabled to compress */ FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */ @@ -578,6 +588,9 @@ typedef struct drm_i915_private { struct io_mapping *gtt_mapping; int gtt_mtrr; + /** PPGTT used for aliasing the PPGTT with the GTT */ + struct i915_hw_ppgtt *aliasing_ppgtt; + struct shrinker inactive_shrinker; /** @@ -973,6 +986,8 @@ struct drm_i915_file_private { #define HAS_LLC(dev) (INTEL_INFO(dev)->has_llc) #define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws) +#define HAS_ALIASING_PPGTT(dev) (INTEL_INFO(dev)->gen >=6) + #define HAS_OVERLAY(dev) (INTEL_INFO(dev)->has_overlay) #define OVERLAY_NEEDS_PHYSICAL(dev) (INTEL_INFO(dev)->overlay_needs_physical) @@ -1232,6 +1247,9 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj, enum i915_cache_level cache_level); /* i915_gem_gtt.c */ +int __must_check i915_gem_init_aliasing_ppgtt(struct drm_device *dev); +void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev); + void i915_gem_restore_gtt_mappings(struct drm_device *dev); int __must_check i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj); void i915_gem_gtt_rebind_object(struct drm_i915_gem_object *obj, diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 11bddd5a5a6a..f408f8c710db 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -29,6 +29,145 @@ #include "i915_trace.h" #include "intel_drv.h" +/* PPGTT support for Sandybdrige/Gen6 and later */ +static void i915_ppgtt_clear_range(struct i915_hw_ppgtt *ppgtt, + unsigned first_entry, + unsigned num_entries) +{ + int i, j; + uint32_t *pt_vaddr; + uint32_t scratch_pte; + + scratch_pte = GEN6_PTE_ADDR_ENCODE(ppgtt->scratch_page_dma_addr); + scratch_pte |= GEN6_PTE_VALID | GEN6_PTE_CACHE_LLC; + + for (i = 0; i < ppgtt->num_pd_entries; i++) { + pt_vaddr = kmap_atomic(ppgtt->pt_pages[i]); + + for (j = 0; j < I915_PPGTT_PT_ENTRIES; j++) + pt_vaddr[j] = scratch_pte; + + kunmap_atomic(pt_vaddr); + } + +} + +int i915_gem_init_aliasing_ppgtt(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct i915_hw_ppgtt *ppgtt; + uint32_t pd_entry; + unsigned first_pd_entry_in_global_pt; + uint32_t __iomem *pd_addr; + int i; + int ret = -ENOMEM; + + /* ppgtt PDEs reside in the global gtt pagetable, which has 512*1024 + * entries. For aliasing ppgtt support we just steal them at the end for + * now. */ + first_pd_entry_in_global_pt = 512*1024 - I915_PPGTT_PD_ENTRIES; + + ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL); + if (!ppgtt) + return ret; + + ppgtt->num_pd_entries = I915_PPGTT_PD_ENTRIES; + ppgtt->pt_pages = kzalloc(sizeof(struct page *)*ppgtt->num_pd_entries, + GFP_KERNEL); + if (!ppgtt->pt_pages) + goto err_ppgtt; + + for (i = 0; i < ppgtt->num_pd_entries; i++) { + ppgtt->pt_pages[i] = alloc_page(GFP_KERNEL); + if (!ppgtt->pt_pages[i]) + goto err_pt_alloc; + } + + if (dev_priv->mm.gtt->needs_dmar) { + ppgtt->pt_dma_addr = kzalloc(sizeof(dma_addr_t) + *ppgtt->num_pd_entries, + GFP_KERNEL); + if (!ppgtt->pt_dma_addr) + goto err_pt_alloc; + } + + pd_addr = dev_priv->mm.gtt->gtt + first_pd_entry_in_global_pt; + for (i = 0; i < ppgtt->num_pd_entries; i++) { + dma_addr_t pt_addr; + if (dev_priv->mm.gtt->needs_dmar) { + pt_addr = pci_map_page(dev->pdev, ppgtt->pt_pages[i], + 0, 4096, + PCI_DMA_BIDIRECTIONAL); + + if (pci_dma_mapping_error(dev->pdev, + pt_addr)) { + ret = -EIO; + goto err_pd_pin; + + } + ppgtt->pt_dma_addr[i] = pt_addr; + } else + pt_addr = page_to_phys(ppgtt->pt_pages[i]); + + pd_entry = GEN6_PDE_ADDR_ENCODE(pt_addr); + pd_entry |= GEN6_PDE_VALID; + + writel(pd_entry, pd_addr + i); + } + readl(pd_addr); + + ppgtt->scratch_page_dma_addr = dev_priv->mm.gtt->scratch_page_dma; + + i915_ppgtt_clear_range(ppgtt, 0, + ppgtt->num_pd_entries*I915_PPGTT_PT_ENTRIES); + + ppgtt->pd_offset = (first_pd_entry_in_global_pt)*sizeof(uint32_t); + + dev_priv->mm.aliasing_ppgtt = ppgtt; + + return 0; + +err_pd_pin: + if (ppgtt->pt_dma_addr) { + for (i--; i >= 0; i--) + pci_unmap_page(dev->pdev, ppgtt->pt_dma_addr[i], + 4096, PCI_DMA_BIDIRECTIONAL); + } +err_pt_alloc: + kfree(ppgtt->pt_dma_addr); + for (i = 0; i < ppgtt->num_pd_entries; i++) { + if (ppgtt->pt_pages[i]) + __free_page(ppgtt->pt_pages[i]); + } + kfree(ppgtt->pt_pages); +err_ppgtt: + kfree(ppgtt); + + return ret; +} + +void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt; + int i; + + if (!ppgtt) + return; + + if (ppgtt->pt_dma_addr) { + for (i = 0; i < ppgtt->num_pd_entries; i++) + pci_unmap_page(dev->pdev, ppgtt->pt_dma_addr[i], + 4096, PCI_DMA_BIDIRECTIONAL); + } + + kfree(ppgtt->pt_dma_addr); + for (i = 0; i < ppgtt->num_pd_entries; i++) + __free_page(ppgtt->pt_pages[i]); + kfree(ppgtt->pt_pages); + kfree(ppgtt); +} + /* XXX kill agp_type! */ static unsigned int cache_level_to_agp_type(struct drm_device *dev, enum i915_cache_level cache_level) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 89816fe3f9d8..92eb404d0632 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -92,6 +92,22 @@ #define GEN6_GRDOM_MEDIA (1 << 2) #define GEN6_GRDOM_BLT (1 << 3) +/* PPGTT stuff */ +#define GEN6_GTT_ADDR_ENCODE(addr) ((addr) | (((addr) >> 28) & 0xff0)) + +#define GEN6_PDE_VALID (1 << 0) +#define GEN6_PDE_LARGE_PAGE (2 << 0) /* use 32kb pages */ +/* gen6+ has bit 11-4 for physical addr bit 39-32 */ +#define GEN6_PDE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) + +#define GEN6_PTE_VALID (1 << 0) +#define GEN6_PTE_UNCACHED (1 << 1) +#define GEN6_PTE_CACHE_LLC (2 << 1) +#define GEN6_PTE_CACHE_LLC_MLC (3 << 1) +#define GEN6_PTE_CACHE_BITS (3 << 1) +#define GEN6_PTE_GFDT (1 << 3) +#define GEN6_PTE_ADDR_ENCODE(addr) GEN6_GTT_ADDR_ENCODE(addr) + /* VGA stuff */ #define VGA_ST01_MDA 0x3ba |
