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drm/amdgpu: change gfx9 ib test to use WB

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two reasons to switch SCRATCH reg method to WB method:

1)Because when doing IB test we don't want to involve KIQ health
status affect, and since SCRATCH register access is go through
KIQ that way GFX IB test would failed due to KIQ fail.

2)acccessing SCRATCH register cost much more time than WB method
because SCRATCH register access runs through KIQ which at least could
begin after GPU world switch back to current Guest VF

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Monk Liu 2018-01-23 18:29:22 +08:00 committed by Alex Deucher
parent 113890ee99
commit ed9324afc0
1 changed files with 54 additions and 47 deletions
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101
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
View file

@ -271,58 +271,65 @@ static int gfx_v9_0_ring_test_ring(struct amdgpu_ring *ring)
static int gfx_v9_0_ring_test_ib(struct amdgpu_ring *ring, long timeout)
{
struct amdgpu_device *adev = ring->adev;
struct amdgpu_ib ib;
struct dma_fence *f = NULL;
uint32_t scratch;
uint32_t tmp = 0;
long r;
struct amdgpu_device *adev = ring->adev;
struct amdgpu_ib ib;
struct dma_fence *f = NULL;
r = amdgpu_gfx_scratch_get(adev, &scratch);
if (r) {
DRM_ERROR("amdgpu: failed to get scratch reg (%ld).\n", r);
return r;
}
WREG32(scratch, 0xCAFEDEAD);
memset(&ib, 0, sizeof(ib));
r = amdgpu_ib_get(adev, NULL, 256, &ib);
if (r) {
DRM_ERROR("amdgpu: failed to get ib (%ld).\n", r);
goto err1;
}
ib.ptr[0] = PACKET3(PACKET3_SET_UCONFIG_REG, 1);
ib.ptr[1] = ((scratch - PACKET3_SET_UCONFIG_REG_START));
ib.ptr[2] = 0xDEADBEEF;
ib.length_dw = 3;
unsigned index;
uint64_t gpu_addr;
uint32_t tmp;
long r;
r = amdgpu_ib_schedule(ring, 1, &ib, NULL, &f);
if (r)
goto err2;
r = amdgpu_device_wb_get(adev, &index);
if (r) {
dev_err(adev->dev, "(%ld) failed to allocate wb slot\n", r);
return r;
}
gpu_addr = adev->wb.gpu_addr + (index * 4);
adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
memset(&ib, 0, sizeof(ib));
r = amdgpu_ib_get(adev, NULL, 16, &ib);
if (r) {
DRM_ERROR("amdgpu: failed to get ib (%ld).\n", r);
goto err1;
}
ib.ptr[0] = PACKET3(PACKET3_WRITE_DATA, 3);
ib.ptr[1] = WRITE_DATA_DST_SEL(5) | WR_CONFIRM;
ib.ptr[2] = lower_32_bits(gpu_addr);
ib.ptr[3] = upper_32_bits(gpu_addr);
ib.ptr[4] = 0xDEADBEEF;
ib.length_dw = 5;
r = amdgpu_ib_schedule(ring, 1, &ib, NULL, &f);
if (r)
goto err2;
r = dma_fence_wait_timeout(f, false, timeout);
if (r == 0) {
DRM_ERROR("amdgpu: IB test timed out.\n");
r = -ETIMEDOUT;
goto err2;
} else if (r < 0) {
DRM_ERROR("amdgpu: fence wait failed (%ld).\n", r);
goto err2;
}
tmp = adev->wb.wb[index];
if (tmp == 0xDEADBEEF) {
DRM_DEBUG("ib test on ring %d succeeded\n", ring->idx);
r = 0;
} else {
DRM_ERROR("ib test on ring %d failed\n", ring->idx);
r = -EINVAL;
}
r = dma_fence_wait_timeout(f, false, timeout);
if (r == 0) {
DRM_ERROR("amdgpu: IB test timed out.\n");
r = -ETIMEDOUT;
goto err2;
} else if (r < 0) {
DRM_ERROR("amdgpu: fence wait failed (%ld).\n", r);
goto err2;
}
tmp = RREG32(scratch);
if (tmp == 0xDEADBEEF) {
DRM_DEBUG("ib test on ring %d succeeded\n", ring->idx);
r = 0;
} else {
DRM_ERROR("amdgpu: ib test failed (scratch(0x%04X)=0x%08X)\n",
scratch, tmp);
r = -EINVAL;
}
err2:
amdgpu_ib_free(adev, &ib, NULL);
dma_fence_put(f);
amdgpu_ib_free(adev, &ib, NULL);
dma_fence_put(f);
err1:
amdgpu_gfx_scratch_free(adev, scratch);
return r;
amdgpu_device_wb_free(adev, index);
return r;
}