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Merge tag 'drm-intel-fixes-2013-08-23' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
Just one patch that soaked for quite a bit to fix a resume issue, resulting in gpu hangs (or worse) due to tlb containing garbage. * tag 'drm-intel-fixes-2013-08-23' of git://people.freedesktop.org/~danvet/drm-intel: drm/i915: Invalidate TLBs for the rings after a reset
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4dd17ee957
@ -752,6 +752,8 @@
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will not assert AGPBUSY# and will only
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be delivered when out of C3. */
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#define INSTPM_FORCE_ORDERING (1<<7) /* GEN6+ */
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#define INSTPM_TLB_INVALIDATE (1<<9)
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#define INSTPM_SYNC_FLUSH (1<<5)
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#define ACTHD 0x020c8
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#define FW_BLC 0x020d8
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#define FW_BLC2 0x020dc
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@ -968,6 +968,18 @@ void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
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I915_WRITE(mmio, (u32)ring->status_page.gfx_addr);
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POSTING_READ(mmio);
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/* Flush the TLB for this page */
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if (INTEL_INFO(dev)->gen >= 6) {
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u32 reg = RING_INSTPM(ring->mmio_base);
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I915_WRITE(reg,
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_MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE |
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INSTPM_SYNC_FLUSH));
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if (wait_for((I915_READ(reg) & INSTPM_SYNC_FLUSH) == 0,
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1000))
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DRM_ERROR("%s: wait for SyncFlush to complete for TLB invalidation timed out\n",
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ring->name);
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}
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}
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static int
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