drm/amdgpu/vce4: enable doorbell for SRIOV

VCE SRIOV need use doorbell and only works on VCN0 ring now

Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 (file)
--- 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;