diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 186 |
1 files changed, 109 insertions, 77 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 5502067..87249e8 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -707,14 +707,14 @@ static inline unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl) return snb_gmch_ctl << 20; } -static inline unsigned int gen6_get_stolen_size(u16 snb_gmch_ctl) +static inline size_t gen6_get_stolen_size(u16 snb_gmch_ctl) { snb_gmch_ctl >>= SNB_GMCH_GMS_SHIFT; snb_gmch_ctl &= SNB_GMCH_GMS_MASK; return snb_gmch_ctl << 25; /* 32 MB units */ } -static inline unsigned int gen7_get_stolen_size(u16 snb_gmch_ctl) +static inline size_t gen7_get_stolen_size(u16 snb_gmch_ctl) { static const int stolen_decoder[] = { 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352}; @@ -723,109 +723,141 @@ static inline unsigned int gen7_get_stolen_size(u16 snb_gmch_ctl) return stolen_decoder[snb_gmch_ctl] << 20; } -int i915_gem_gtt_init(struct drm_device *dev) +static int gen6_gmch_probe(struct drm_device *dev, + size_t *gtt_total, + size_t *stolen) { 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; - dev_priv->gtt.mappable_base = pci_resource_start(dev->pdev, 2); - dev_priv->gtt.mappable_end = pci_resource_len(dev->pdev, 2); - - /* On modern platforms we need not worry ourself with the legacy - * hostbridge query stuff. Skip it entirely + /* 64/512MB is the current min/max we actually know of, but this is just + * a coarse sanity check. */ - if (INTEL_INFO(dev)->gen < 6) { - ret = intel_gmch_probe(dev_priv->bridge_dev, dev->pdev, NULL); - if (!ret) { - DRM_ERROR("failed to set up gmch\n"); - return -EIO; - } - - dev_priv->mm.gtt = intel_gtt_get(); - if (!dev_priv->mm.gtt) { - DRM_ERROR("Failed to initialize GTT\n"); - intel_gmch_remove(); - return -ENODEV; - } - - dev_priv->gtt.do_idle_maps = needs_idle_maps(dev); - - dev_priv->gtt.gtt_clear_range = i915_ggtt_clear_range; - dev_priv->gtt.gtt_insert_entries = i915_ggtt_insert_entries; - - return 0; + if ((dev_priv->gtt.mappable_end < (64<<20) || + (dev_priv->gtt.mappable_end > (512<<20)))) { + DRM_ERROR("Unknown GMADR size (%lx)\n", + dev_priv->gtt.mappable_end); + return -ENXIO; } if (!pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(40))) pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(40)); - - dev_priv->mm.gtt = kzalloc(sizeof(*dev_priv->mm.gtt), GFP_KERNEL); - if (!dev_priv->mm.gtt) - return -ENOMEM; - - /* For GEN6+ the PTEs for the ggtt live at 2MB + BAR0 */ - gtt_bus_addr = pci_resource_start(dev->pdev, 0) + (2<<20); - - /* i9xx_setup */ pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl); - dev_priv->mm.gtt->gtt_total_entries = - gen6_get_total_gtt_size(snb_gmch_ctl) / sizeof(gtt_pte_t); - if (INTEL_INFO(dev)->gen < 7) - dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl); - else - dev_priv->mm.gtt->stolen_size = gen7_get_stolen_size(snb_gmch_ctl); + gtt_size = gen6_get_total_gtt_size(snb_gmch_ctl); - /* 64/512MB is the current min/max we actually know of, but this is just a - * coarse sanity check. - */ - if ((dev_priv->gtt.mappable_end < (64<<20) || - (dev_priv->gtt.mappable_end > (512<<20)))) { - DRM_ERROR("Unknown GMADR size (%lx)\n", - dev_priv->gtt.mappable_end); - ret = -ENXIO; - goto err_out; - } + if (IS_GEN7(dev)) + *stolen = gen7_get_stolen_size(snb_gmch_ctl); + else + *stolen = gen6_get_stolen_size(snb_gmch_ctl); - ret = setup_scratch_page(dev); - if (ret) { - DRM_ERROR("Scratch setup failed\n"); - goto err_out; - } + *gtt_total = (gtt_size / sizeof(gtt_pte_t)) << PAGE_SHIFT; - dev_priv->gtt.gsm = ioremap_wc(gtt_bus_addr, - dev_priv->mm.gtt->gtt_total_entries * sizeof(gtt_pte_t)); + /* For GEN6+ the PTEs for the ggtt live at 2MB + BAR0 */ + gtt_bus_addr = pci_resource_start(dev->pdev, 0) + (2<<20); + 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"); - teardown_scratch_page(dev); - ret = -ENOMEM; - goto err_out; + return -ENOMEM; } - /* GMADR is the PCI aperture used by SW to access tiled GFX surfaces in a linear fashion. */ - DRM_INFO("Memory usable by graphics device = %dM\n", dev_priv->mm.gtt->gtt_total_entries >> 8); - DRM_DEBUG_DRIVER("GMADR size = %ldM\n", dev_priv->gtt.mappable_end >> 20); - DRM_DEBUG_DRIVER("GTT stolen size = %dM\n", dev_priv->mm.gtt->stolen_size >> 20); + ret = setup_scratch_page(dev); + if (ret) + DRM_ERROR("Scratch setup failed\n"); dev_priv->gtt.gtt_clear_range = gen6_ggtt_clear_range; dev_priv->gtt.gtt_insert_entries = gen6_ggtt_insert_entries; - return 0; - -err_out: - kfree(dev_priv->mm.gtt); - if (INTEL_INFO(dev)->gen < 6) - intel_gmch_remove(); return ret; } -void i915_gem_gtt_fini(struct drm_device *dev) +void gen6_gmch_remove(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; iounmap(dev_priv->gtt.gsm); - teardown_scratch_page(dev); - if (INTEL_INFO(dev)->gen < 6) - intel_gmch_remove(); + teardown_scratch_page(dev_priv->dev); kfree(dev_priv->mm.gtt); } + +static int i915_gmch_probe(struct drm_device *dev, + size_t *gtt_total, + size_t *stolen) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int ret; + + /* This is a temporary hack to make the code cleaner in + * i915_gem_gtt_init. I promise it will go away very shortly. */ + kfree(dev_priv->mm.gtt); + + ret = intel_gmch_probe(dev_priv->bridge_dev, dev_priv->dev->pdev, NULL); + if (!ret) { + DRM_ERROR("failed to set up gmch\n"); + return -EIO; + } + + dev_priv->mm.gtt = intel_gtt_get(); + if (!dev_priv->mm.gtt) { + DRM_ERROR("Failed to initialize GTT\n"); + intel_gmch_remove(); + return -ENODEV; + } + + dev_priv->gtt.do_idle_maps = needs_idle_maps(dev_priv->dev); + dev_priv->gtt.gtt_clear_range = i915_ggtt_clear_range; + dev_priv->gtt.gtt_insert_entries = i915_ggtt_insert_entries; + + return 0; +} + +static void i915_gmch_remove(struct drm_device *dev) +{ + intel_gmch_remove(); +} + +int i915_gem_gtt_init(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct i915_gtt *gtt = &dev_priv->gtt; + unsigned long gtt_size; + int ret; + + dev_priv->mm.gtt = kzalloc(sizeof(*dev_priv->mm.gtt), GFP_KERNEL); + if (!dev_priv->mm.gtt) + return -ENOMEM; + + gtt->mappable_base = pci_resource_start(dev->pdev, 2); + gtt->mappable_end = pci_resource_len(dev->pdev, 2); + + if (INTEL_INFO(dev)->gen <= 5) { + dev_priv->gtt.gtt_probe = i915_gmch_probe; + dev_priv->gtt.gtt_remove = i915_gmch_remove; + } else { + dev_priv->gtt.gtt_probe = gen6_gmch_probe; + dev_priv->gtt.gtt_remove = gen6_gmch_remove; + } + + ret = dev_priv->gtt.gtt_probe(dev, &dev_priv->gtt.total, + &dev_priv->gtt.stolen_size); + if (ret) { + kfree(dev_priv->mm.gtt); + return ret; + } + + dev_priv->mm.gtt->gtt_total_entries = dev_priv->gtt.total >> PAGE_SHIFT; + dev_priv->mm.gtt->stolen_size = dev_priv->gtt.stolen_size; + + gtt_size = (dev_priv->gtt.total >> PAGE_SHIFT) * sizeof(gtt_pte_t); + + /* GMADR is the PCI mmio aperture into the global GTT. */ + DRM_INFO("Memory usable by graphics device = %zdM\n", + dev_priv->gtt.total >> 20); + DRM_DEBUG_DRIVER("GMADR size = %ldM\n", + dev_priv->gtt.mappable_end >> 20); + DRM_DEBUG_DRIVER("GTT stolen size = %zdM\n", + dev_priv->gtt.stolen_size >> 20); + + return 0; +} |