提交 9a289771 编写于 作者: J Jesse Barnes 提交者: Daniel Vetter

drm/i915: TLB invalidation with MI_FLUSH_DW requires a post-sync op v3

So store into the scratch space of the HWS to make sure the invalidate
occurs.

v2: use GTT address space for store, clean up #defines (Chris)
v3: use correct #define in blt ring flush (Chris)
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NAntti Koskipää <antti.koskipaa@intel.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
References: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1063252Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
上级 12f3382b
......@@ -242,8 +242,12 @@
*/
#define MI_LOAD_REGISTER_IMM(x) MI_INSTR(0x22, 2*x-1)
#define MI_FLUSH_DW MI_INSTR(0x26, 1) /* for GEN6 */
#define MI_INVALIDATE_TLB (1<<18)
#define MI_INVALIDATE_BSD (1<<7)
#define MI_FLUSH_DW_STORE_INDEX (1<<21)
#define MI_INVALIDATE_TLB (1<<18)
#define MI_FLUSH_DW_OP_STOREDW (1<<14)
#define MI_INVALIDATE_BSD (1<<7)
#define MI_FLUSH_DW_USE_GTT (1<<2)
#define MI_FLUSH_DW_USE_PPGTT (0<<2)
#define MI_BATCH_BUFFER MI_INSTR(0x30, 1)
#define MI_BATCH_NON_SECURE (1)
/* for snb/ivb/vlv this also means "batch in ppgtt" when ppgtt is enabled. */
......
......@@ -1395,10 +1395,17 @@ static int gen6_ring_flush(struct intel_ring_buffer *ring,
return ret;
cmd = MI_FLUSH_DW;
/*
* Bspec vol 1c.5 - video engine command streamer:
* "If ENABLED, all TLBs will be invalidated once the flush
* operation is complete. This bit is only valid when the
* Post-Sync Operation field is a value of 1h or 3h."
*/
if (invalidate & I915_GEM_GPU_DOMAINS)
cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD;
cmd |= MI_INVALIDATE_TLB | MI_INVALIDATE_BSD |
MI_FLUSH_DW_STORE_INDEX | MI_FLUSH_DW_OP_STOREDW;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
......@@ -1460,10 +1467,17 @@ static int blt_ring_flush(struct intel_ring_buffer *ring,
return ret;
cmd = MI_FLUSH_DW;
/*
* Bspec vol 1c.3 - blitter engine command streamer:
* "If ENABLED, all TLBs will be invalidated once the flush
* operation is complete. This bit is only valid when the
* Post-Sync Operation field is a value of 1h or 3h."
*/
if (invalidate & I915_GEM_DOMAIN_RENDER)
cmd |= MI_INVALIDATE_TLB;
cmd |= MI_INVALIDATE_TLB | MI_FLUSH_DW_STORE_INDEX |
MI_FLUSH_DW_OP_STOREDW | MI_FLUSH_DW_OP_STOREDW;
intel_ring_emit(ring, cmd);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
intel_ring_emit(ring, 0);
intel_ring_emit(ring, MI_NOOP);
intel_ring_advance(ring);
......
......@@ -183,6 +183,8 @@ intel_read_status_page(struct intel_ring_buffer *ring,
* The area from dword 0x20 to 0x3ff is available for driver usage.
*/
#define I915_GEM_HWS_INDEX 0x20
#define I915_GEM_HWS_SCRATCH_INDEX 0x30
#define I915_GEM_HWS_SCRATCH_ADDR (I915_GEM_HWS_SCRATCH_INDEX << MI_STORE_DWORD_INDEX_SHIFT)
void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring);
......
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