mutex_unlock(&dev_priv->mm.stolen_lock);
}
-static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
+static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
+ struct resource *dsm)
{
struct i915_ggtt *ggtt = &dev_priv->ggtt;
- dma_addr_t base = intel_graphics_stolen_res.start;
struct resource *r;
- GEM_BUG_ON(overflows_type(intel_graphics_stolen_res.start, base));
+ if (dsm->start == 0 || dsm->end <= dsm->start)
+ return -EINVAL;
- if (base == 0 || add_overflows(base, ggtt->stolen_size))
- return 0;
+ /*
+ * TODO: We have yet too encounter the case where the GTT wasn't at the
+ * end of stolen. With that assumption we could simplify this.
+ */
- /* make sure we don't clobber the GTT if it's within stolen memory */
+ /* Make sure we don't clobber the GTT if it's within stolen memory */
if (INTEL_GEN(dev_priv) <= 4 &&
!IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
- struct {
- dma_addr_t start, end;
- } stolen[2] = {
- { .start = base, .end = base + ggtt->stolen_size, },
- { .start = base, .end = base + ggtt->stolen_size, },
- };
- u64 ggtt_start, ggtt_end;
+ struct resource stolen[2] = {*dsm, *dsm};
+ struct resource ggtt_res;
+ u64 ggtt_start;
ggtt_start = I915_READ(PGTBL_CTL);
if (IS_GEN4(dev_priv))
(ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
else
ggtt_start &= PGTBL_ADDRESS_LO_MASK;
- ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4;
-
- if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end)
- stolen[0].end = ggtt_start;
- if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end)
- stolen[1].start = ggtt_end;
-
- /* pick the larger of the two chunks */
- if (stolen[0].end - stolen[0].start >
- stolen[1].end - stolen[1].start) {
- base = stolen[0].start;
- ggtt->stolen_size = stolen[0].end - stolen[0].start;
- } else {
- base = stolen[1].start;
- ggtt->stolen_size = stolen[1].end - stolen[1].start;
- }
+
+ ggtt_res =
+ (struct resource) DEFINE_RES_MEM(ggtt_start,
+ ggtt_total_entries(ggtt) * 4);
+
+ if (ggtt_res.start >= stolen[0].start && ggtt_res.start < stolen[0].end)
+ stolen[0].end = ggtt_res.start;
+ if (ggtt_res.end > stolen[1].start && ggtt_res.end <= stolen[1].end)
+ stolen[1].start = ggtt_res.end;
+
+ /* Pick the larger of the two chunks */
+ if (resource_size(&stolen[0]) > resource_size(&stolen[1]))
+ *dsm = stolen[0];
+ else
+ *dsm = stolen[1];
if (stolen[0].start != stolen[1].start ||
stolen[0].end != stolen[1].end) {
- dma_addr_t end = base + ggtt->stolen_size - 1;
-
- DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
- (unsigned long long)ggtt_start,
- (unsigned long long)ggtt_end - 1);
- DRM_DEBUG_KMS("Stolen memory adjusted to %pad - %pad\n",
- &base, &end);
+ DRM_DEBUG_KMS("GTT within stolen memory at %pR\n", &ggtt_res);
+ DRM_DEBUG_KMS("Stolen memory adjusted to %pR\n", dsm);
}
}
-
- /* Verify that nothing else uses this physical address. Stolen
+ /*
+ * Verify that nothing else uses this physical address. Stolen
* memory should be reserved by the BIOS and hidden from the
* kernel. So if the region is already marked as busy, something
* is seriously wrong.
*/
- r = devm_request_mem_region(dev_priv->drm.dev, base, ggtt->stolen_size,
+ r = devm_request_mem_region(dev_priv->drm.dev, dsm->start,
+ resource_size(dsm),
"Graphics Stolen Memory");
if (r == NULL) {
/*
* One more attempt but this time requesting region from
- * base + 1, as we have seen that this resolves the region
+ * start + 1, as we have seen that this resolves the region
* conflict with the PCI Bus.
* This is a BIOS w/a: Some BIOS wrap stolen in the root
* PCI bus, but have an off-by-one error. Hence retry the
* reservation starting from 1 instead of 0.
* There's also BIOS with off-by-one on the other end.
*/
- r = devm_request_mem_region(dev_priv->drm.dev, base + 1,
- ggtt->stolen_size - 2,
+ r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1,
+ resource_size(dsm) - 2,
"Graphics Stolen Memory");
/*
* GEN3 firmware likes to smash pci bridges into the stolen
* range. Apparently this works.
*/
if (r == NULL && !IS_GEN3(dev_priv)) {
- dma_addr_t end = base + ggtt->stolen_size;
+ DRM_ERROR("conflict detected with stolen region: %pR\n",
+ dsm);
- DRM_ERROR("conflict detected with stolen region: [%pad - %pad]\n",
- &base, &end);
- base = 0;
+ return -EBUSY;
}
}
- return base;
+ return 0;
}
void i915_gem_cleanup_stolen(struct drm_device *dev)
static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
dma_addr_t *base, u32 *size)
{
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
CTG_STOLEN_RESERVED :
ELK_STOLEN_RESERVED);
- dma_addr_t stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+ dma_addr_t stolen_top = dev_priv->dsm.end + 1;
if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0) {
*base = 0;
static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
dma_addr_t *base, u32 *size)
{
- struct i915_ggtt *ggtt = &dev_priv->ggtt;
uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
dma_addr_t stolen_top;
return;
}
- stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+ stolen_top = dev_priv->dsm.end + 1;
*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
return 0;
}
- if (ggtt->stolen_size == 0)
+ if (resource_size(&intel_graphics_stolen_res) == 0)
return 0;
- dev_priv->mm.stolen_base = i915_stolen_to_dma(dev_priv);
- if (dev_priv->mm.stolen_base == 0)
+ dev_priv->dsm = intel_graphics_stolen_res;
+
+ if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))
return 0;
- stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+ GEM_BUG_ON(dev_priv->dsm.start == 0);
+ GEM_BUG_ON(dev_priv->dsm.end <= dev_priv->dsm.start);
+
+ stolen_top = dev_priv->dsm.end + 1;
reserved_base = 0;
reserved_size = 0;
reserved_base = stolen_top;
}
- if (reserved_base < dev_priv->mm.stolen_base ||
+ if (reserved_base < dev_priv->dsm.start ||
reserved_base + reserved_size > stolen_top) {
dma_addr_t reserved_top = reserved_base + reserved_size;
- DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
- &reserved_base, &reserved_top,
- &dev_priv->mm.stolen_base, &stolen_top);
+ DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory %pR\n",
+ &reserved_base, &reserved_top, &dev_priv->dsm);
return 0;
}
* memory, so just consider the start. */
reserved_total = stolen_top - reserved_base;
- DRM_DEBUG_KMS("Memory reserved for graphics device: %uK, usable: %uK\n",
- ggtt->stolen_size >> 10,
- (ggtt->stolen_size - reserved_total) >> 10);
+ DRM_DEBUG_KMS("Memory reserved for graphics device: %lluK, usable: %lluK\n",
+ (u64)resource_size(&dev_priv->dsm) >> 10,
+ ((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10);
stolen_usable_start = 0;
/* WaSkipStolenMemoryFirstPage:bdw+ */
stolen_usable_start = 4096;
ggtt->stolen_usable_size =
- ggtt->stolen_size - reserved_total - stolen_usable_start;
+ resource_size(&dev_priv->dsm) - reserved_total - stolen_usable_start;
/* Basic memrange allocator for stolen space. */
drm_mm_init(&dev_priv->mm.stolen, stolen_usable_start,
struct sg_table *st;
struct scatterlist *sg;
- GEM_BUG_ON(range_overflows(offset, size, dev_priv->ggtt.stolen_size));
+ GEM_BUG_ON(range_overflows_t(resource_size_t, offset, size,
+ resource_size(&dev_priv->dsm)));
/* We hide that we have no struct page backing our stolen object
* by wrapping the contiguous physical allocation with a fake
sg->offset = 0;
sg->length = size;
- sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
+ sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset;
sg_dma_len(sg) = size;
return st;
projects / openwrt / staging / blogic.git / commitdiff