WebSVN – Kolibri OS – Diff – /drivers/video/drm/i915/i915_gem_stolen.c

 #include
 #include
+#include "i915_drv.h"
+#define KB(x) ((x) * 1024)
-#include "i915_drv.h"
+#define MB(x) (KB(x) * 1024)
 /*
  * The BIOS typically reserves some of the system's memory for the exclusive
  * use of the integrated graphics. This memory is no longer available for
  * goal is try to reuse that object for our own fbcon which must always
  * be available for panics. Anything else we can reuse the stolen memory
  * for is a boon.
  */
+int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
+					 struct drm_mm_node *node, u64 size,
+					 unsigned alignment, u64 start, u64 end)
+{
+	int ret;
+	if (!drm_mm_initialized(&dev_priv->mm.stolen))
+		return -ENODEV;
+	/* See the comment at the drm_mm_init() call for more about this check.
+	 * WaSkipStolenMemoryFirstPage:bdw,chv (incomplete) */
+	if (INTEL_INFO(dev_priv)->gen == 8 && start < 4096)
+		start = 4096;
+	mutex_lock(&dev_priv->mm.stolen_lock);
+	ret = drm_mm_insert_node_in_range(&dev_priv->mm.stolen, node, size,
+					  alignment, start, end,
+					  DRM_MM_SEARCH_DEFAULT);
+	mutex_unlock(&dev_priv->mm.stolen_lock);
+	return ret;
+}
+int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,
+				struct drm_mm_node *node, u64 size,
+				unsigned alignment)
+{
+	return i915_gem_stolen_insert_node_in_range(dev_priv, node, size,
+					alignment, 0,
+					dev_priv->gtt.stolen_usable_size);
+}
+void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
+				 struct drm_mm_node *node)
+{
+	mutex_lock(&dev_priv->mm.stolen_lock);
+	drm_mm_remove_node(node);
+	mutex_unlock(&dev_priv->mm.stolen_lock);
+}
 static unsigned long i915_stolen_to_physical(struct drm_device *dev)
+{
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct resource *r;
 	u32 base;
 	/* Almost universally we can find the Graphics Base of Stolen Memory
 	 * at offset 0x5c in the igfx configuration space. On a few (desktop)
+	 * machines this is also mirrored in the bridge device at different
-	 * machines this is also mirrored in the bridge device at different
+	 * locations, or in the MCHBAR.
+	 *
-	 * locations, or in the MCHBAR. On gen2, the layout is again slightly
+	 * On 865 we just check the TOUD register.
-	 * different with the Graphics Segment immediately following Top of
+	 *
-	 * Memory (or Top of Usable DRAM). Note it appears that TOUD is only
-	 * reported by 865g, so we just use the top of memory as determined
+	 * On 830/845/85x the stolen memory base isn't available in any
-	 * by the e820 probe.
 	 * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
 	 * XXX However gen2 requires an unavailable symbol.
 	 */
 	base = 0;
 	if (INTEL_INFO(dev)->gen >= 3) {
+	}
 #endif
 	return base;
+}
-static int find_compression_threshold(struct drm_device *dev,
-				      struct drm_mm_node *node,
-				      int size,
-				      int fb_cpp)
+void i915_gem_cleanup_stolen(struct drm_device *dev)
+{
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	int compression_threshold = 1;
-	int ret;
-	/* HACK: This code depends on what we will do in *_enable_fbc. If that
-	 * code changes, this code needs to change as well.
-	 *
-	 * The enable_fbc code will attempt to use one of our 2 compression
-	 * thresholds, therefore, in that case, we only have 1 resort.
-	 */
+	struct drm_i915_private *dev_priv = dev->dev_private;
-	/* Try to over-allocate to reduce reallocations and fragmentation. */
-	ret = drm_mm_insert_node(&dev_priv->mm.stolen, node,
-				 size <<= 1, 4096, DRM_MM_SEARCH_DEFAULT);
-	if (ret == 0)
-		return compression_threshold;
-again:
-	/* HW's ability to limit the CFB is 1:4 */
-	if (compression_threshold > 4 ||
-	    (fb_cpp == 2 && compression_threshold == 2))
+	if (!drm_mm_initialized(&dev_priv->mm.stolen))
-		return 0;
-	ret = drm_mm_insert_node(&dev_priv->mm.stolen, node,
-					 size >>= 1, 4096,
-					 DRM_MM_SEARCH_DEFAULT);
-	if (ret && INTEL_INFO(dev)->gen <= 4) {
-		return 0;
-	} else if (ret) {
-		compression_threshold <<= 1;
-		goto again;
-	} else {
+		return;
-		return compression_threshold;
+	drm_mm_takedown(&dev_priv->mm.stolen);
+}
-}
+static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
+				    unsigned long *base, unsigned long *size)
+{
-static int i915_setup_compression(struct drm_device *dev, int size, int fb_cpp)
+	uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
+				     CTG_STOLEN_RESERVED :
+				     ELK_STOLEN_RESERVED);
+	unsigned long stolen_top = dev_priv->mm.stolen_base +
+		dev_priv->gtt.stolen_size;
-{
+	*base = (reg_val & G4X_STOLEN_RESERVED_ADDR2_MASK) << 16;
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	WARN_ON((reg_val & G4X_STOLEN_RESERVED_ADDR1_MASK) < *base);
-	struct drm_mm_node *uninitialized_var(compressed_llb);
-	int ret;
+	/* On these platforms, the register doesn't have a size field, so the
+	 * size is the distance between the base and the top of the stolen
+	 * memory. We also have the genuine case where base is zero and there's
-	ret = find_compression_threshold(dev, &dev_priv->fbc.compressed_fb,
+	 * nothing reserved. */
-					 size, fb_cpp);
-	if (!ret)
-		goto err_llb;
+	if (*base == 0)
-	else if (ret > 1) {
-		DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n");
-	}
+		*size = 0;
-	dev_priv->fbc.threshold = ret;
-	if (HAS_PCH_SPLIT(dev))
+	else
-		I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start);
-	else if (IS_GM45(dev)) {
-		I915_WRITE(DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start);
+		*size = stolen_top - *base;
-	} else {
-		compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL);
+}
-		if (!compressed_llb)
-			goto err_fb;
+static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
-		ret = drm_mm_insert_node(&dev_priv->mm.stolen, compressed_llb,
+				     unsigned long *base, unsigned long *size)
+{
+	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
+	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
+	switch (reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK) {
+	case GEN6_STOLEN_RESERVED_1M:
+		*size = 1024 * 1024;
-, 4096, DRM_MM_SEARCH_DEFAULT);
+		break;
+	case GEN6_STOLEN_RESERVED_512K:
+		*size = 512 * 1024;
+		break;
-		if (ret)
+	case GEN6_STOLEN_RESERVED_256K:
-			goto err_fb;
+		*size = 256 * 1024;
 		break;
-		dev_priv->fbc.compressed_llb = compressed_llb;
-		I915_WRITE(FBC_CFB_BASE,
-			   dev_priv->mm.stolen_base + dev_priv->fbc.compressed_fb.start);
-		I915_WRITE(FBC_LL_BASE,
-			   dev_priv->mm.stolen_base + compressed_llb->start);
-	}
-	dev_priv->fbc.size = size / dev_priv->fbc.threshold;
-	DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n",
-		      size);
-	return 0;
 	case GEN6_STOLEN_RESERVED_128K:
-err_fb:
+		*size = 128 * 1024;
+		break;
-	kfree(compressed_llb);
+	default:
-	drm_mm_remove_node(&dev_priv->fbc.compressed_fb);
+		*size = 1024 * 1024;
-err_llb:
-	pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size);
-	return -ENOSPC;
-}
-int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
+		MISSING_CASE(reg_val & GEN6_STOLEN_RESERVED_SIZE_MASK);
+	}
+}
+static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
+				     unsigned long *base, unsigned long *size)
+{
+	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
+	*base = reg_val & GEN7_STOLEN_RESERVED_ADDR_MASK;
+	switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
-	if (!drm_mm_initialized(&dev_priv->mm.stolen))
+	case GEN7_STOLEN_RESERVED_1M:
-		return -ENODEV;
+		*size = 1024 * 1024;
+		break;
 	case GEN7_STOLEN_RESERVED_256K:
-	if (size < dev_priv->fbc.size)
+		*size = 256 * 1024;
-		return 0;
-	/* Release any current block */
-	i915_gem_stolen_cleanup_compression(dev);
+		break;
+	default:
-	return i915_setup_compression(dev, size, fb_cpp);
+		*size = 1024 * 1024;
+		MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
+	}
+}
+static void gen8_get_stolen_reserved(struct drm_i915_private *dev_priv,
+				     unsigned long *base, unsigned long *size)
+{
+	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
-}
+	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
+	switch (reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK) {
+	case GEN8_STOLEN_RESERVED_1M:
+		*size = 1024 * 1024;
 		break;
-void i915_gem_stolen_cleanup_compression(struct drm_device *dev)
-{
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	case GEN8_STOLEN_RESERVED_2M:
+		*size = 2 * 1024 * 1024;
+		break;
-	if (dev_priv->fbc.size == 0)
+	case GEN8_STOLEN_RESERVED_4M:
-		return;
+		*size = 4 * 1024 * 1024;
+		break;
+	case GEN8_STOLEN_RESERVED_8M:
-	drm_mm_remove_node(&dev_priv->fbc.compressed_fb);
+		*size = 8 * 1024 * 1024;
+		break;
+	default:
+		*size = 8 * 1024 * 1024;
+		MISSING_CASE(reg_val & GEN8_STOLEN_RESERVED_SIZE_MASK);
+	}
+}
+static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
-	if (dev_priv->fbc.compressed_llb) {
+				    unsigned long *base, unsigned long *size)
 		drm_mm_remove_node(dev_priv->fbc.compressed_llb);
-		kfree(dev_priv->fbc.compressed_llb);
+	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
 	unsigned long stolen_top;
+	stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
-	dev_priv->fbc.size = 0;
+	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
-}
 	/* On these platforms, the register doesn't have a size field, so the
-void i915_gem_cleanup_stolen(struct drm_device *dev)
+	 * size is the distance between the base and the top of the stolen
 	 * memory. We also have the genuine case where base is zero and there's
-	struct drm_i915_private *dev_priv = dev->dev_private;
+	 * nothing reserved. */
 	dev_priv->mm.stolen_base = i915_stolen_to_physical(dev);
 	if (dev_priv->mm.stolen_base == 0)
-		return 0;
+		return 0;
-	DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n",
+	stolen_top = dev_priv->mm.stolen_base + dev_priv->gtt.stolen_size;
+	switch (INTEL_INFO(dev_priv)->gen) {
+	case 2:
+	case 3:
+		break;
+	case 4:
+		if (IS_G4X(dev))
+			g4x_get_stolen_reserved(dev_priv, &reserved_base,
+						&reserved_size);
-		      dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base);
+		break;
+	case 5:
+		/* Assume the gen6 maximum for the older platforms. */
+		reserved_size = 1024 * 1024;
+		reserved_base = stolen_top - reserved_size;
+		break;
+	case 6:
+		gen6_get_stolen_reserved(dev_priv, &reserved_base,
+					 &reserved_size);
-	if (INTEL_INFO(dev)->gen >= 8) {
+		break;
+	case 7:
+		gen7_get_stolen_reserved(dev_priv, &reserved_base,
+					 &reserved_size);
+		break;
-		tmp = I915_READ(GEN7_BIOS_RESERVED);
+	default:
+		if (IS_BROADWELL(dev_priv) || IS_SKYLAKE(dev_priv))
+			bdw_get_stolen_reserved(dev_priv, &reserved_base,
+						&reserved_size);
+		else
+			gen8_get_stolen_reserved(dev_priv, &reserved_base,
+						 &reserved_size);
+		break;
+	}
-		tmp >>= GEN8_BIOS_RESERVED_SHIFT;
+	/* It is possible for the reserved base to be zero, but the register
-		tmp &= GEN8_BIOS_RESERVED_MASK;
+	 * field for size doesn't have a zero option. */
+	if (reserved_base == 0) {
+		reserved_size = 0;
-		bios_reserved = (1024*1024) << tmp;
+		reserved_base = stolen_top;
+	}
+	if (reserved_base < dev_priv->mm.stolen_base ||
+	    reserved_base + reserved_size > stolen_top) {
-	} else if (IS_GEN7(dev)) {
+		DRM_DEBUG_KMS("Stolen reserved area [0x%08lx - 0x%08lx] outside stolen memory [0x%08lx - 0x%08lx]\n",
-		tmp = I915_READ(GEN7_BIOS_RESERVED);
+			      reserved_base, reserved_base + reserved_size,
+			      dev_priv->mm.stolen_base, stolen_top);
+		return 0;
+	}
-		bios_reserved = tmp & GEN7_BIOS_RESERVED_256K ?
+	/* It is possible for the reserved area to end before the end of stolen
-*1024 : 1024*1024;
+	 * memory, so just consider the start. */
+	reserved_total = stolen_top - reserved_base;
+	DRM_DEBUG_KMS("Memory reserved for graphics device: %zuK, usable: %luK\n",
+		      dev_priv->gtt.stolen_size >> 10,
+		      (dev_priv->gtt.stolen_size - reserved_total) >> 10);
-	}
+	dev_priv->gtt.stolen_usable_size = dev_priv->gtt.stolen_size -
+					   reserved_total;
+	/*
+	 * Basic memrange allocator for stolen space.
+	 *
+	 * TODO: Notice that some platforms require us to not use the first page
-	if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size))
+	 * of the stolen memory but their BIOSes may still put the framebuffer
+	 * on the first page. So we don't reserve this page for now because of
+	 * that. Our current solution is to just prevent new nodes from being
-		return 0;
+	 * inserted on the first page - see the check we have at
 	 * i915_gem_stolen_insert_node_in_range(). We may want to fix the fbcon
-	/* Basic memrange allocator for stolen space */
+	 * problem later.
 static void
+i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
+{
-i915_gem_object_release_stolen(struct drm_i915_gem_object *obj)
+	struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
-{
 	if (obj->stolen) {
-		drm_mm_remove_node(obj->stolen);
+		i915_gem_stolen_remove_node(dev_priv, obj->stolen);
 		kfree(obj->stolen);
 		obj->stolen = NULL;
+	}
 	obj->pages = i915_pages_create_for_stolen(dev,
 						  stolen->start, stolen->size);
 	if (obj->pages == NULL)
 		goto cleanup;
 	obj->has_dma_mapping = true;
 	i915_gem_object_pin_pages(obj);
 	obj->stolen = stolen;
 	stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
 	if (!stolen)
 		return NULL;
 	ret = drm_mm_insert_node(&dev_priv->mm.stolen, stolen, size,
-, DRM_MM_SEARCH_DEFAULT);
+	ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);
 	if (ret) {
 		kfree(stolen);
 		return NULL;
+	}
 	obj = _i915_gem_object_create_stolen(dev, stolen);
 	if (obj)
 		return obj;
-	drm_mm_remove_node(stolen);
+	i915_gem_stolen_remove_node(dev_priv, stolen);
 	DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n",
 			stolen_offset, gtt_offset, size);
-	/* KISS and expect everything to be page-aligned */
-	BUG_ON(stolen_offset & 4095);
-	BUG_ON(size & 4095);
+	/* KISS and expect everything to be page-aligned */
 	if (WARN_ON(size == 0) || WARN_ON(size & 4095) ||
-	if (WARN_ON(size == 0))
+	    WARN_ON(stolen_offset & 4095))
 		return NULL;
 	stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
 	if (!stolen)
+		return NULL;
 		return NULL;
+	stolen->start = stolen_offset;
 	stolen->size = size;
-	stolen->start = stolen_offset;
+	mutex_lock(&dev_priv->mm.stolen_lock);
-	stolen->size = size;
+	ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
-	ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
+	mutex_unlock(&dev_priv->mm.stolen_lock);
 	if (ret) {
 		DRM_DEBUG_KMS("failed to allocate stolen space\n");
 		kfree(stolen);
 		return NULL;
 	}
 	obj = _i915_gem_object_create_stolen(dev, stolen);
 	if (obj == NULL) {
 		DRM_DEBUG_KMS("failed to allocate stolen object\n");
 		return obj;
 	vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt);
 	if (IS_ERR(vma)) {
 		ret = PTR_ERR(vma);
-		goto err_out;
+		goto err;
+	}
 	/* To simplify the initialisation sequence between KMS and GTT,
 	vma->node.size = size;
 	if (drm_mm_initialized(&ggtt->mm)) {
 		ret = drm_mm_reserve_node(&ggtt->mm, &vma->node);
 		if (ret) {
 			DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
-			goto err_vma;
+			goto err;
-		}
+		}
+		vma->bound |= GLOBAL_BIND;
+		__i915_vma_set_map_and_fenceable(vma);
+		list_add_tail(&vma->mm_list, &ggtt->inactive_list);
 	vma->bound |= GLOBAL_BIND;
 	list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
-	list_add_tail(&vma->mm_list, &ggtt->inactive_list);
+	list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
-	i915_gem_object_pin_pages(obj);
-	return obj;
+	i915_gem_object_pin_pages(obj);
-err_vma:
 	i915_gem_vma_destroy(vma);
-err_out:
+	return obj;
 	drm_mm_remove_node(stolen);

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/i915/i915_gem_stolen.c – Rev 5367 → 6084