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drm/amdgpu: invalidate L2 before SDMA IBs (v2) 

This fixes GPU hangs due to cache coherency issues.

v2: Split the version bump to a separate patch

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Marek Olšák 2020-04-27 15:59:22 -04:00 committed by Alex Deucher
parent c938628c44
commit fdf83646c0
2 changed files with 29 additions and 1 deletions
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16
drivers/gpu/drm/amd/amdgpu/navi10_sdma_pkt_open.h
View File

@ -73,6 +73,22 @@
#define SDMA_OP_AQL_COPY 0
#define SDMA_OP_AQL_BARRIER_OR 0
#define SDMA_GCR_RANGE_IS_PA (1 << 18)
#define SDMA_GCR_SEQ(x) (((x) & 0x3) << 16)
#define SDMA_GCR_GL2_WB (1 << 15)
#define SDMA_GCR_GL2_INV (1 << 14)
#define SDMA_GCR_GL2_DISCARD (1 << 13)
#define SDMA_GCR_GL2_RANGE(x) (((x) & 0x3) << 11)
#define SDMA_GCR_GL2_US (1 << 10)
#define SDMA_GCR_GL1_INV (1 << 9)
#define SDMA_GCR_GLV_INV (1 << 8)
#define SDMA_GCR_GLK_INV (1 << 7)
#define SDMA_GCR_GLK_WB (1 << 6)
#define SDMA_GCR_GLM_INV (1 << 5)
#define SDMA_GCR_GLM_WB (1 << 4)
#define SDMA_GCR_GL1_RANGE(x) (((x) & 0x3) << 2)
#define SDMA_GCR_GLI_INV(x) (((x) & 0x3) << 0)
/*define for op field*/
#define SDMA_PKT_HEADER_op_offset 0
#define SDMA_PKT_HEADER_op_mask 0x000000FF

14
drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
View File

@ -382,6 +382,18 @@ static void sdma_v5_0_ring_emit_ib(struct amdgpu_ring *ring,
unsigned vmid = AMDGPU_JOB_GET_VMID(job);
uint64_t csa_mc_addr = amdgpu_sdma_get_csa_mc_addr(ring, vmid);
/* Invalidate L2, because if we don't do it, we might get stale cache
* lines from previous IBs.
*/
amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_GCR_REQ));
amdgpu_ring_write(ring, 0);
amdgpu_ring_write(ring, (SDMA_GCR_GL2_INV |
SDMA_GCR_GL2_WB |
SDMA_GCR_GLM_INV |
SDMA_GCR_GLM_WB) << 16);
amdgpu_ring_write(ring, 0xffffff80);
amdgpu_ring_write(ring, 0xffff);
/* An IB packet must end on a 8 DW boundary--the next dword
* must be on a 8-dword boundary. Our IB packet below is 6
* dwords long, thus add x number of NOPs, such that, in
@ -1595,7 +1607,7 @@ static const struct amdgpu_ring_funcs sdma_v5_0_ring_funcs = {
SOC15_FLUSH_GPU_TLB_NUM_WREG * 3 +
SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 6 * 2 +
10 + 10 + 10, /* sdma_v5_0_ring_emit_fence x3 for user fence, vm fence */
.emit_ib_size = 7 + 6, /* sdma_v5_0_ring_emit_ib */
.emit_ib_size = 5 + 7 + 6, /* sdma_v5_0_ring_emit_ib */
.emit_ib = sdma_v5_0_ring_emit_ib,
.emit_fence = sdma_v5_0_ring_emit_fence,
.emit_pipeline_sync = sdma_v5_0_ring_emit_pipeline_sync,