From: Xiangliang Yu <xiangliang...@amd.com>
VCE SRIOV need use doorbell and only works on VCN0 ring now
Signed-off-by: Xiangliang Yu <xiangliang...@amd.com>
Signed-off-by: Monk Liu <monk....@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
Acked-by: Christian König <christian.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/vce_v4_0.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
index 74146be..21a86d8 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
@@ -78,6 +78,9 @@ static uint64_t vce_v4_0_ring_get_wptr(struct amdgpu_ring
*ring)
{
struct amdgpu_device *adev = ring->adev;
+ if (ring->use_doorbell)
+ return adev->wb.wb[ring->wptr_offs];
+
if (ring == &adev->vce.ring[0])
return RREG32(SOC15_REG_OFFSET(VCE, 0, mmVCE_RB_WPTR));
else if (ring == &adev->vce.ring[1])
@@ -97,6 +100,13 @@ static void vce_v4_0_ring_set_wptr(struct amdgpu_ring *ring)
{
struct amdgpu_device *adev = ring->adev;
+ if (ring->use_doorbell) {
+ /* XXX check if swapping is necessary on BE */
+ adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr);
+ WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr));
+ return;
+ }
+
if (ring == &adev->vce.ring[0])
WREG32(SOC15_REG_OFFSET(VCE, 0, mmVCE_RB_WPTR),
lower_32_bits(ring->wptr));
@@ -220,7 +230,10 @@ static int vce_v4_0_early_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
- adev->vce.num_rings = 3;
+ if (amdgpu_sriov_vf(adev)) /* currently only VCN0 support SRIOV */
+ adev->vce.num_rings = 1;
+ else
+ adev->vce.num_rings = 3;
vce_v4_0_set_ring_funcs(adev);
vce_v4_0_set_irq_funcs(adev);
@@ -266,6 +279,16 @@ static int vce_v4_0_sw_init(void *handle)
for (i = 0; i < adev->vce.num_rings; i++) {
ring = &adev->vce.ring[i];
sprintf(ring->name, "vce%d", i);
+ if (amdgpu_sriov_vf(adev)) {
+ /* DOORBELL only works under SRIOV */
+ ring->use_doorbell = true;
+ if (i == 0)
+ ring->doorbell_index =
AMDGPU_DOORBELL64_RING0_1 * 2;
+ else if (i == 1)
+ ring->doorbell_index =
AMDGPU_DOORBELL64_RING2_3 * 2;
+ else
+ ring->doorbell_index =
AMDGPU_DOORBELL64_RING2_3 * 2 + 1;
+ }
r = amdgpu_ring_init(adev, ring, 512, &adev->vce.irq, 0);
if (r)
return r;
--
2.5.5
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