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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-28 05:54:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-28 05:54:23 -0700
commit37be944a0270402f9cda291a930b0286f6dc92f5 (patch)
tree6a91a9eb86450f4a18a8871f04a1ef810e7b55d6 /drivers/char
parentca836a25435ef1b9914840ed0a310c9b6ac261d1 (diff)
parent1717c0e23f411147490c7a3312b894f0ea9a5fb1 (diff)
downloadop-kernel-dev-37be944a0270402f9cda291a930b0286f6dc92f5.zip
op-kernel-dev-37be944a0270402f9cda291a930b0286f6dc92f5.tar.gz
Merge branch 'drm-core-next' of git://people.freedesktop.org/~airlied/linux
* 'drm-core-next' of git://people.freedesktop.org/~airlied/linux: (290 commits) Revert "drm/ttm: add a way to bo_wait for either the last read or last write" Revert "drm/radeon/kms: add a new gem_wait ioctl with read/write flags" vmwgfx: Don't pass unused arguments to do_dirty functions vmwgfx: Emulate depth 32 framebuffers drm/radeon: Lower the severity of the radeon lockup messages. drm/i915/dp: Fix eDP on PCH DP on CPT/PPT drm/i915/dp: Introduce is_cpu_edp() drm/i915: use correct SPD type value drm/i915: fix ILK+ infoframe support drm/i915: add DP test request handling drm/i915: read full receiver capability field during DP hot plug drm/i915/dp: Remove eDP special cases from bandwidth checks drm/i915/dp: Fix the math in intel_dp_link_required drm/i915/panel: Always record the backlight level again (but cleverly) i915: Move i915_read/write out of line drm/i915: remove transcoder PLL mashing from mode_set per specs drm/i915: if transcoder disable fails, say which drm/i915: set watermarks for third pipe on IVB drm/i915: export a CPT mode set verification function drm/i915: fix transcoder PLL select masking ...
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/agp/intel-gtt.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 2774ac1..66cd0b8 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -923,6 +923,9 @@ static int intel_fake_agp_insert_entries(struct agp_memory *mem,
{
int ret = -EINVAL;
+ if (intel_private.base.do_idle_maps)
+ return -ENODEV;
+
if (intel_private.clear_fake_agp) {
int start = intel_private.base.stolen_size / PAGE_SIZE;
int end = intel_private.base.gtt_mappable_entries;
@@ -985,6 +988,9 @@ static int intel_fake_agp_remove_entries(struct agp_memory *mem,
if (mem->page_count == 0)
return 0;
+ if (intel_private.base.do_idle_maps)
+ return -ENODEV;
+
intel_gtt_clear_range(pg_start, mem->page_count);
if (intel_private.base.needs_dmar) {
@@ -1177,6 +1183,25 @@ static void gen6_cleanup(void)
{
}
+/* Certain Gen5 chipsets require require idling the GPU before
+ * unmapping anything from the GTT when VT-d is enabled.
+ */
+extern int intel_iommu_gfx_mapped;
+static inline int needs_idle_maps(void)
+{
+ const unsigned short gpu_devid = intel_private.pcidev->device;
+
+ /* Query intel_iommu to see if we need the workaround. Presumably that
+ * was loaded first.
+ */
+ if ((gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_HB ||
+ gpu_devid == PCI_DEVICE_ID_INTEL_IRONLAKE_M_IG) &&
+ intel_iommu_gfx_mapped)
+ return 1;
+
+ return 0;
+}
+
static int i9xx_setup(void)
{
u32 reg_addr;
@@ -1211,6 +1236,9 @@ static int i9xx_setup(void)
intel_private.gtt_bus_addr = reg_addr + gtt_offset;
}
+ if (needs_idle_maps());
+ intel_private.base.do_idle_maps = 1;
+
intel_i9xx_setup_flush();
return 0;
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