#define PTE_VALID (1 << 0)
/**
- * i915_gtt_to_phys - take a GTT address and turn it into a physical one
+ * i915_stolen_to_phys - take an offset into stolen memory and turn it into
+ * a physical one
* @dev: drm device
- * @gtt_addr: address to translate
+ * @offset: address to translate
*
- * Some chip functions require allocations from stolen space but need the
- * physical address of the memory in question. We use this routine
- * to get a physical address suitable for register programming from a given
- * GTT address.
+ * Some chip functions require allocations from stolen space and need the
+ * physical address of the memory in question.
*/
-static unsigned long i915_gtt_to_phys(struct drm_device *dev,
- unsigned long gtt_addr)
+static unsigned long i915_stolen_to_phys(struct drm_device *dev, u32 offset)
{
- unsigned long *gtt;
- unsigned long entry, phys;
- int gtt_bar = IS_GEN2(dev) ? 1 : 0;
- int gtt_offset, gtt_size;
-
- if (INTEL_INFO(dev)->gen >= 4) {
- if (IS_G4X(dev) || INTEL_INFO(dev)->gen > 4) {
- gtt_offset = 2*1024*1024;
- gtt_size = 2*1024*1024;
- } else {
- gtt_offset = 512*1024;
- gtt_size = 512*1024;
- }
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct pci_dev *pdev = dev_priv->bridge_dev;
+ u32 base;
+
+#if 0
+ /* On the machines I have tested the Graphics Base of Stolen Memory
+ * is unreliable, so compute the base by subtracting the stolen memory
+ * from the Top of Low Usable DRAM which is where the BIOS places
+ * the graphics stolen memory.
+ */
+ if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
+ /* top 32bits are reserved = 0 */
+ pci_read_config_dword(pdev, 0xA4, &base);
} else {
- gtt_bar = 3;
- gtt_offset = 0;
- gtt_size = pci_resource_len(dev->pdev, gtt_bar);
- }
-
- gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,
- gtt_size);
- if (!gtt) {
- DRM_ERROR("ioremap of GTT failed\n");
- return 0;
- }
-
- entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));
-
- DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);
-
- /* Mask out these reserved bits on this hardware. */
- if (INTEL_INFO(dev)->gen < 4 && !IS_G33(dev))
- entry &= ~PTE_ADDRESS_MASK_HIGH;
-
- /* If it's not a mapping type we know, then bail. */
- if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&
- (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) {
- iounmap(gtt);
- return 0;
- }
-
- if (!(entry & PTE_VALID)) {
- DRM_ERROR("bad GTT entry in stolen space\n");
- iounmap(gtt);
- return 0;
+ /* XXX presume 8xx is the same as i915 */
+ pci_bus_read_config_dword(pdev->bus, 2, 0x5C, &base);
+ }
+#else
+ if (INTEL_INFO(dev)->gen > 3 || IS_G33(dev)) {
+ u16 val;
+ pci_read_config_word(pdev, 0xb0, &val);
+ base = val >> 4 << 20;
+ } else {
+ u8 val;
+ pci_read_config_byte(pdev, 0x9c, &val);
+ base = val >> 3 << 27;
}
+ base -= dev_priv->mm.gtt->gtt_stolen_entries << PAGE_SHIFT;
+#endif
- iounmap(gtt);
-
- phys =(entry & PTE_ADDRESS_MASK) |
- ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));
-
- DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);
-
- return phys;
+ return base + offset;
}
static void i915_warn_stolen(struct drm_device *dev)
unsigned long cfb_base;
unsigned long ll_base = 0;
- /* Leave 1M for line length buffer & misc. */
- compressed_fb = drm_mm_search_free(&dev_priv->mm.vram, size, 4096, 0);
- if (!compressed_fb) {
- dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
- i915_warn_stolen(dev);
- return;
- }
-
- compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
- if (!compressed_fb) {
- i915_warn_stolen(dev);
- dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
- return;
- }
+ compressed_fb = drm_mm_search_free(&dev_priv->mm.stolen, size, 4096, 0);
+ if (compressed_fb)
+ compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);
+ if (!compressed_fb)
+ goto err;
- cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);
- if (!cfb_base) {
- DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
- drm_mm_put_block(compressed_fb);
- }
+ cfb_base = i915_stolen_to_phys(dev, compressed_fb->start);
+ if (!cfb_base)
+ goto err_fb;
if (!(IS_GM45(dev) || IS_IRONLAKE_M(dev))) {
- compressed_llb = drm_mm_search_free(&dev_priv->mm.vram, 4096,
- 4096, 0);
- if (!compressed_llb) {
- i915_warn_stolen(dev);
- return;
- }
-
- compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096);
- if (!compressed_llb) {
- i915_warn_stolen(dev);
- return;
- }
+ compressed_llb = drm_mm_search_free(&dev_priv->mm.stolen,
+ 4096, 4096, 0);
+ if (compressed_llb)
+ compressed_llb = drm_mm_get_block(compressed_llb,
+ 4096, 4096);
+ if (!compressed_llb)
+ goto err_fb;
- ll_base = i915_gtt_to_phys(dev, compressed_llb->start);
- if (!ll_base) {
- DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");
- drm_mm_put_block(compressed_fb);
- drm_mm_put_block(compressed_llb);
- }
+ ll_base = i915_stolen_to_phys(dev, compressed_llb->start);
+ if (!ll_base)
+ goto err_llb;
}
dev_priv->cfb_size = size;
dev_priv->compressed_llb = compressed_llb;
}
- DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,
- ll_base, size >> 20);
+ DRM_DEBUG_KMS("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n",
+ cfb_base, ll_base, size >> 20);
+ return;
+
+err_llb:
+ drm_mm_put_block(compressed_llb);
+err_fb:
+ drm_mm_put_block(compressed_fb);
+err:
+ dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
+ i915_warn_stolen(dev);
}
static void i915_cleanup_compression(struct drm_device *dev)
prealloc_size = dev_priv->mm.gtt->gtt_stolen_entries << PAGE_SHIFT;
gtt_size = dev_priv->mm.gtt->gtt_total_entries << PAGE_SHIFT;
mappable_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
- gtt_size -= PAGE_SIZE;
- /* Basic memrange allocator for stolen space (aka mm.vram) */
- drm_mm_init(&dev_priv->mm.vram, 0, prealloc_size);
+ /* Basic memrange allocator for stolen space */
+ drm_mm_init(&dev_priv->mm.stolen, 0, prealloc_size);
- /* Let GEM Manage from end of prealloc space to end of aperture.
+ /* 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
* 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, prealloc_size, mappable_size, gtt_size);
+ i915_gem_do_init(dev, 0, mappable_size, gtt_size - PAGE_SIZE);
mutex_lock(&dev->struct_mutex);
ret = i915_gem_init_ringbuffer(dev);
if (I915_HAS_FBC(dev) && i915_powersave) {
int cfb_size;
- /* Try to get an 8M buffer... */
- if (prealloc_size > (9*1024*1024))
- cfb_size = 8*1024*1024;
+ /* Leave 1M for line length buffer & misc. */
+
+ /* Try to get a 32M buffer... */
+ if (prealloc_size > (36*1024*1024))
+ cfb_size = 32*1024*1024;
else /* fall back to 7/8 of the stolen space */
cfb_size = prealloc_size * 7 / 8;
i915_setup_compression(dev, cfb_size);
}
- /* Allow hardware batchbuffers unless told otherwise.
- */
+ /* Allow hardware batchbuffers unless told otherwise. */
dev_priv->allow_batchbuffer = 1;
ret = intel_parse_bios(dev);
{
struct drm_i915_private *dev_priv;
int ret = 0, mmio_bar;
- uint32_t agp_size, prealloc_size;
+ uint32_t agp_size;
+
/* i915 has 4 more counters */
dev->counters += 4;
dev->types[6] = _DRM_STAT_IRQ;
goto out_iomapfree;
}
- prealloc_size = dev_priv->mm.gtt->gtt_stolen_entries << PAGE_SHIFT;
agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
dev_priv->mm.gtt_mapping =
/* enable GEM by default */
dev_priv->has_gem = 1;
- if (prealloc_size > agp_size * 3 / 4) {
- DRM_ERROR("Detected broken video BIOS with %d/%dkB of video "
- "memory stolen.\n",
- prealloc_size / 1024, agp_size / 1024);
- DRM_ERROR("Disabling GEM. (try reducing stolen memory or "
- "updating the BIOS to fix).\n");
- dev_priv->has_gem = 0;
- }
-
if (dev_priv->has_gem == 0 &&
drm_core_check_feature(dev, DRIVER_MODESET)) {
DRM_ERROR("kernel modesetting requires GEM, disabling driver.\n");
mutex_unlock(&dev->struct_mutex);
if (I915_HAS_FBC(dev) && i915_powersave)
i915_cleanup_compression(dev);
- drm_mm_takedown(&dev_priv->mm.vram);
+ drm_mm_takedown(&dev_priv->mm.stolen);
intel_cleanup_overlay(dev);
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff