drm/amdgpu: Use PSP program IH_RB_CNTL registers under SRIOV

[Why]
With L1 Policy applied, IH_RB_CNTL/RING cannot be accessed by VF.

[How]
Use PSP program IH_RB_CNTL in VF.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Signed-off-by: Horace Chen <horace.chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/ih_v6_0.c

@@ -105,7 +105,13 @@ force_update_wptr_for_self_int(struct amdgpu_device *adev,
 	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL_RING1,
 				   RB_USED_INT_THRESHOLD, threshold);
 
-	WREG32_SOC15(OSSSYS, 0, regIH_RB_CNTL_RING1, ih_rb_cntl);
+	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
+		if (psp_reg_program(&adev->psp, PSP_REG_IH_RB_CNTL_RING1, ih_rb_cntl))
+			return;
+	} else {
+		WREG32_SOC15(OSSSYS, 0, regIH_RB_CNTL_RING1, ih_rb_cntl);
+	}
+
 	WREG32_SOC15(OSSSYS, 0, regIH_CNTL2, ih_cntl);
 }
 
@@ -132,7 +138,13 @@ static int ih_v6_0_toggle_ring_interrupts(struct amdgpu_device *adev,
 	/* enable_intr field is only valid in ring0 */
 	if (ih == &adev->irq.ih)
 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
-	WREG32(ih_regs->ih_rb_cntl, tmp);
+
+	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
+		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp))
+			return -ETIMEDOUT;
+	} else {
+		WREG32(ih_regs->ih_rb_cntl, tmp);
+	}
 
 	if (enable) {
 		ih->enabled = true;
@@ -242,7 +254,15 @@ static int ih_v6_0_enable_ring(struct amdgpu_device *adev,
 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 0);
 		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
 	}
-	WREG32(ih_regs->ih_rb_cntl, tmp);
+
+	if (amdgpu_sriov_vf(adev) && amdgpu_sriov_reg_indirect_ih(adev)) {
+		if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
+			DRM_ERROR("PSP program IH_RB_CNTL failed!\n");
+			return -ETIMEDOUT;
+		}
+	} else {
+		WREG32(ih_regs->ih_rb_cntl, tmp);
+	}
 
 	if (ih == &adev->irq.ih) {
 		/* set the ih ring 0 writeback address whether it's enabled or not */