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-rw-r--r--drivers/char/agp/intel-gtt.c2
-rw-r--r--drivers/gpu/drm/i915/i915_dma.c16
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h10
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c12
-rw-r--r--drivers/gpu/drm/i915/i915_gem_execbuffer.c2
-rw-r--r--drivers/gpu/drm/i915/i915_gem_gtt.c257
-rw-r--r--drivers/gpu/drm/i915/i915_reg.h6
-rw-r--r--include/drm/intel-gtt.h3
8 files changed, 257 insertions, 51 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 38390f7c6ab6..4dfbb80f0fd5 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1686,7 +1686,7 @@ int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
}
EXPORT_SYMBOL(intel_gmch_probe);
-const struct intel_gtt *intel_gtt_get(void)
+struct intel_gtt *intel_gtt_get(void)
{
return &intel_private.base;
}
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index ff06e3239ada..1eea5be43617 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1496,19 +1496,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
goto free_priv;
}
- ret = intel_gmch_probe(dev_priv->bridge_dev, dev->pdev, NULL);
- if (!ret) {
- DRM_ERROR("failed to set up gmch\n");
- ret = -EIO;
+ ret = i915_gem_gtt_init(dev);
+ if (ret)
goto put_bridge;
- }
-
- dev_priv->mm.gtt = intel_gtt_get();
- if (!dev_priv->mm.gtt) {
- DRM_ERROR("Failed to initialize GTT\n");
- ret = -ENODEV;
- goto put_gmch;
- }
i915_kick_out_firmware_fb(dev_priv);
@@ -1683,7 +1673,7 @@ out_mtrrfree:
out_rmmap:
pci_iounmap(dev->pdev, dev_priv->regs);
put_gmch:
- intel_gmch_remove();
+ i915_gem_gtt_fini(dev);
put_bridge:
pci_dev_put(dev_priv->bridge_dev);
free_priv:
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c4339c2b1b57..f316916fe65e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -746,7 +746,7 @@ typedef struct drm_i915_private {
struct {
/** Bridge to intel-gtt-ko */
- const struct intel_gtt *gtt;
+ struct intel_gtt *gtt;
/** Memory allocator for GTT stolen memory */
struct drm_mm stolen;
/** Memory allocator for GTT */
@@ -1538,6 +1538,14 @@ void i915_gem_init_global_gtt(struct drm_device *dev,
unsigned long start,
unsigned long mappable_end,
unsigned long end);
+int i915_gem_gtt_init(struct drm_device *dev);
+void i915_gem_gtt_fini(struct drm_device *dev);
+extern inline void i915_gem_chipset_flush(struct drm_device *dev)
+{
+ if (INTEL_INFO(dev)->gen < 6)
+ intel_gtt_chipset_flush();
+}
+
/* i915_gem_evict.c */
int __must_check i915_gem_evict_something(struct drm_device *dev, int min_size,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d8eaebfea93e..c161fdbd830f 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -845,12 +845,12 @@ out:
* domain anymore. */
if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
i915_gem_clflush_object(obj);
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(dev);
}
}
if (needs_clflush_after)
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(dev);
return ret;
}
@@ -3058,7 +3058,7 @@ i915_gem_object_flush_cpu_write_domain(struct drm_i915_gem_object *obj)
return;
i915_gem_clflush_object(obj);
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(obj->base.dev);
old_write_domain = obj->base.write_domain;
obj->base.write_domain = 0;
@@ -3959,7 +3959,7 @@ i915_gem_init_hw(struct drm_device *dev)
drm_i915_private_t *dev_priv = dev->dev_private;
int ret;
- if (!intel_enable_gtt())
+ if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt())
return -EIO;
if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1))
@@ -4294,7 +4294,7 @@ void i915_gem_detach_phys_object(struct drm_device *dev,
page_cache_release(page);
}
}
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(dev);
obj->phys_obj->cur_obj = NULL;
obj->phys_obj = NULL;
@@ -4381,7 +4381,7 @@ i915_gem_phys_pwrite(struct drm_device *dev,
return -EFAULT;
}
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(dev);
return 0;
}
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 91d43d5c4526..d80e9dd00c48 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -672,7 +672,7 @@ i915_gem_execbuffer_move_to_gpu(struct intel_ring_buffer *ring,
}
if (flush_domains & I915_GEM_DOMAIN_CPU)
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(ring->dev);
if (flush_domains & I915_GEM_DOMAIN_GTT)
wmb();
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 06202fd6dbdd..e74be0c2c6a5 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -262,26 +262,6 @@ void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
obj->base.size >> PAGE_SHIFT);
}
-/* XXX kill agp_type! */
-static unsigned int cache_level_to_agp_type(struct drm_device *dev,
- enum i915_cache_level cache_level)
-{
- switch (cache_level) {
- case I915_CACHE_LLC_MLC:
- /* Older chipsets do not have this extra level of CPU
- * cacheing, so fallthrough and request the PTE simply
- * as cached.
- */
- if (INTEL_INFO(dev)->gen >= 6 && !IS_HASWELL(dev))
- return AGP_USER_CACHED_MEMORY_LLC_MLC;
- case I915_CACHE_LLC:
- return AGP_USER_CACHED_MEMORY;
- default:
- case I915_CACHE_NONE:
- return AGP_USER_MEMORY;
- }
-}
-
static bool do_idling(struct drm_i915_private *dev_priv)
{
bool ret = dev_priv->mm.interruptible;
@@ -304,13 +284,38 @@ static void undo_idling(struct drm_i915_private *dev_priv, bool interruptible)
dev_priv->mm.interruptible = interruptible;
}
+
+static void i915_ggtt_clear_range(struct drm_device *dev,
+ unsigned first_entry,
+ unsigned num_entries)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ gtt_pte_t scratch_pte;
+ volatile void __iomem *gtt_base = dev_priv->mm.gtt->gtt + first_entry;
+ const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
+
+ if (INTEL_INFO(dev)->gen < 6) {
+ intel_gtt_clear_range(first_entry, num_entries);
+ return;
+ }
+
+ 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 = pte_encode(dev, dev_priv->mm.gtt->scratch_page_dma, I915_CACHE_LLC);
+ memset_io(gtt_base, scratch_pte, num_entries * sizeof(scratch_pte));
+ readl(gtt_base);
+}
+
void i915_gem_restore_gtt_mappings(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj;
/* First fill our portion of the GTT with scratch pages */
- intel_gtt_clear_range(dev_priv->mm.gtt_start / PAGE_SIZE,
+ i915_ggtt_clear_range(dev, dev_priv->mm.gtt_start / PAGE_SIZE,
(dev_priv->mm.gtt_end - dev_priv->mm.gtt_start) / PAGE_SIZE);
list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) {
@@ -318,7 +323,7 @@ void i915_gem_restore_gtt_mappings(struct drm_device *dev)
i915_gem_gtt_bind_object(obj, obj->cache_level);
}
- intel_gtt_chipset_flush();
+ i915_gem_chipset_flush(dev);
}
int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj)
@@ -334,21 +339,69 @@ int i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj)
return 0;
}
+/*
+ * 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
+ * within the global GTT as well as accessible by the GPU through the GMADR
+ * mapped BAR (dev_priv->mm.gtt->gtt).
+ */
+static void gen6_ggtt_bind_object(struct drm_i915_gem_object *obj,
+ enum i915_cache_level level)
+{
+ struct drm_device *dev = obj->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct sg_table *st = obj->pages;
+ struct scatterlist *sg = st->sgl;
+ const int first_entry = obj->gtt_space->start >> PAGE_SHIFT;
+ const int max_entries = dev_priv->mm.gtt->gtt_total_entries - first_entry;
+ gtt_pte_t __iomem *gtt_entries = dev_priv->mm.gtt->gtt + first_entry;
+ int unused, i = 0;
+ unsigned int len, m = 0;
+ dma_addr_t addr;
+
+ for_each_sg(st->sgl, sg, st->nents, unused) {
+ len = sg_dma_len(sg) >> PAGE_SHIFT;
+ for (m = 0; m < len; m++) {
+ addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
+ gtt_entries[i] = pte_encode(dev, addr, level);
+ i++;
+ }
+ }
+
+ BUG_ON(i > max_entries);
+ BUG_ON(i != obj->base.size / PAGE_SIZE);
+
+ /* 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(readl(&gtt_entries[i-1]) != pte_encode(dev, addr, level));
+}
+
void i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj,
enum i915_cache_level cache_level)
{
struct drm_device *dev = obj->base.dev;
- unsigned int agp_type = cache_level_to_agp_type(dev, cache_level);
+ if (INTEL_INFO(dev)->gen < 6) {
+ unsigned int flags = (cache_level == I915_CACHE_NONE) ?
+ AGP_USER_MEMORY : AGP_USER_CACHED_MEMORY;
+ intel_gtt_insert_sg_entries(obj->pages,
+ obj->gtt_space->start >> PAGE_SHIFT,
+ flags);
+ } else {
+ gen6_ggtt_bind_object(obj, cache_level);
+ }
- intel_gtt_insert_sg_entries(obj->pages,
- obj->gtt_space->start >> PAGE_SHIFT,
- agp_type);
obj->has_global_gtt_mapping = 1;
}
void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj)
{
- intel_gtt_clear_range(obj->gtt_space->start >> PAGE_SHIFT,
+ i915_ggtt_clear_range(obj->base.dev,
+ obj->gtt_space->start >> PAGE_SHIFT,
obj->base.size >> PAGE_SHIFT);
obj->has_global_gtt_mapping = 0;
@@ -406,5 +459,153 @@ void i915_gem_init_global_gtt(struct drm_device *dev,
dev_priv->mm.mappable_gtt_total = min(end, mappable_end) - start;
/* ... but ensure that we clear the entire range. */
- intel_gtt_clear_range(start / PAGE_SIZE, (end-start) / PAGE_SIZE);
+ i915_ggtt_clear_range(dev, start / PAGE_SIZE, (end-start) / PAGE_SIZE);
+}
+
+static int setup_scratch_page(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct page *page;
+ dma_addr_t dma_addr;
+
+ page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
+ if (page == NULL)
+ return -ENOMEM;
+ get_page(page);
+ set_pages_uc(page, 1);
+
+#ifdef CONFIG_INTEL_IOMMU
+ dma_addr = pci_map_page(dev->pdev, page, 0, PAGE_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
+ if (pci_dma_mapping_error(dev->pdev, dma_addr))
+ return -EINVAL;
+#else
+ dma_addr = page_to_phys(page);
+#endif
+ dev_priv->mm.gtt->scratch_page = page;
+ dev_priv->mm.gtt->scratch_page_dma = dma_addr;
+
+ return 0;
+}
+
+static void teardown_scratch_page(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ set_pages_wb(dev_priv->mm.gtt->scratch_page, 1);
+ pci_unmap_page(dev->pdev, dev_priv->mm.gtt->scratch_page_dma,
+ PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+ put_page(dev_priv->mm.gtt->scratch_page);
+ __free_page(dev_priv->mm.gtt->scratch_page);
+}
+
+static inline unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
+{
+ snb_gmch_ctl >>= SNB_GMCH_GGMS_SHIFT;
+ snb_gmch_ctl &= SNB_GMCH_GGMS_MASK;
+ return snb_gmch_ctl << 20;
+}
+
+static inline unsigned int 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 */
+}
+
+int i915_gem_gtt_init(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ phys_addr_t gtt_bus_addr;
+ u16 snb_gmch_ctl;
+ u32 tmp;
+ int ret;
+
+ /* On modern platforms we need not worry ourself with the legacy
+ * hostbridge query stuff. Skip it entirely
+ */
+ 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;
+ }
+ return 0;
+ }
+
+ dev_priv->mm.gtt = kzalloc(sizeof(*dev_priv->mm.gtt), GFP_KERNEL);
+ if (!dev_priv->mm.gtt)
+ return -ENOMEM;
+
+ 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_dword(dev->pdev, PCI_BASE_ADDRESS_0, &tmp);
+ /* For GEN6+ the PTEs for the ggtt live at 2MB + BAR0 */
+ gtt_bus_addr = (tmp & PCI_BASE_ADDRESS_MEM_MASK) + (2<<20);
+
+ pci_read_config_dword(dev->pdev, PCI_BASE_ADDRESS_2, &tmp);
+ dev_priv->mm.gtt->gma_bus_addr = tmp & PCI_BASE_ADDRESS_MEM_MASK;
+
+ /* 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);
+ dev_priv->mm.gtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl);
+
+ dev_priv->mm.gtt->gtt_mappable_entries = pci_resource_len(dev->pdev, 2) >> PAGE_SHIFT;
+ /* 64/512MB is the current min/max we actually know of, but this is just a
+ * coarse sanity check.
+ */
+ if ((dev_priv->mm.gtt->gtt_mappable_entries >> 8) < 64 ||
+ dev_priv->mm.gtt->gtt_mappable_entries > dev_priv->mm.gtt->gtt_total_entries) {
+ DRM_ERROR("Unknown GMADR entries (%d)\n",
+ dev_priv->mm.gtt->gtt_mappable_entries);
+ ret = -ENXIO;
+ goto err_out;
+ }
+
+ ret = setup_scratch_page(dev);
+ if (ret) {
+ DRM_ERROR("Scratch setup failed\n");
+ goto err_out;
+ }
+
+ dev_priv->mm.gtt->gtt = ioremap(gtt_bus_addr,
+ dev_priv->mm.gtt->gtt_total_entries * sizeof(gtt_pte_t));
+ if (!dev_priv->mm.gtt->gtt) {
+ DRM_ERROR("Failed to map the gtt page table\n");
+ teardown_scratch_page(dev);
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ /* GMADR is the PCI aperture used by SW to access tiled GFX surfaces in a linear fashion. */
+ DRM_INFO("Memory Usable by graphics device = %dK\n", dev_priv->mm.gtt->gtt_total_entries >> 10);
+ DRM_DEBUG_DRIVER("GMADR size = %dM\n", dev_priv->mm.gtt->gtt_mappable_entries >> 8);
+ DRM_DEBUG_DRIVER("GTT stolen size = %dM\n", dev_priv->mm.gtt->stolen_size >> 20);
+
+ 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)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ iounmap(dev_priv->mm.gtt->gtt);
+ teardown_scratch_page(dev);
+ if (INTEL_INFO(dev)->gen < 6)
+ intel_gmch_remove();
+ kfree(dev_priv->mm.gtt);
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 0866ac3d0a3f..449403f60e4f 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -41,6 +41,12 @@
*/
#define INTEL_GMCH_CTRL 0x52
#define INTEL_GMCH_VGA_DISABLE (1 << 1)
+#define SNB_GMCH_CTRL 0x50
+#define SNB_GMCH_GGMS_SHIFT 8 /* GTT Graphics Memory Size */
+#define SNB_GMCH_GGMS_MASK 0x3
+#define SNB_GMCH_GMS_SHIFT 3 /* Graphics Mode Select */
+#define SNB_GMCH_GMS_MASK 0x1f
+
/* PCI config space */
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 2e37e9f02e71..94e8f2c7f9e1 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -3,7 +3,7 @@
#ifndef _DRM_INTEL_GTT_H
#define _DRM_INTEL_GTT_H
-const struct intel_gtt {
+struct intel_gtt {
/* Size of memory reserved for graphics by the BIOS */
unsigned int stolen_size;
/* Total number of gtt entries. */
@@ -17,6 +17,7 @@ const struct intel_gtt {
unsigned int do_idle_maps : 1;
/* Share the scratch page dma with ppgtts. */
dma_addr_t scratch_page_dma;
+ struct page *scratch_page;
/* for ppgtt PDE access */
u32 __iomem *gtt;
/* needed for ioremap in drm/i915 */
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-14 20:20:25 +0000