drm/amdgpu/gfx: fix MEC interrupt enablement for pipes != 0

The interrupt registers are not indexed.

Fixes: 763a47b8 (drm/amdgpu: teach amdgpu how to enable interrupts for any pipe v3)
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c

@@ -5015,28 +5015,51 @@ static void gfx_v7_0_set_compute_eop_interrupt_state(struct amdgpu_device *adev,
 						     int me, int pipe,
 						     enum amdgpu_interrupt_state state)
 {
-	/* Me 0 is for graphics and Me 2 is reserved for HW scheduling
-	 * So we should only really be configuring ME 1 i.e. MEC0
+	u32 mec_int_cntl, mec_int_cntl_reg;
+
+	/*
+	 * amdgpu controls only the first MEC. That's why this function only
+	 * handles the setting of interrupts for this specific MEC. All other
+	 * pipes' interrupts are set by amdkfd.
 	 */
-	if (me != 1) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid me:%d\n", me);
+
+	if (me == 1) {
+		switch (pipe) {
+		case 0:
+			mec_int_cntl_reg = mmCP_ME1_PIPE0_INT_CNTL;
+			break;
+		case 1:
+			mec_int_cntl_reg = mmCP_ME1_PIPE1_INT_CNTL;
+			break;
+		case 2:
+			mec_int_cntl_reg = mmCP_ME1_PIPE2_INT_CNTL;
+			break;
+		case 3:
+			mec_int_cntl_reg = mmCP_ME1_PIPE3_INT_CNTL;
+			break;
+		default:
+			DRM_DEBUG("invalid pipe %d\n", pipe);
 			return;
 		}
-
-	if (pipe >= adev->gfx.mec.num_pipe_per_mec) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid "
-				"me:%d pipe:%d\n", pipe, me);
+	} else {
+		DRM_DEBUG("invalid me %d\n", me);
 		return;
 	}
 
-	mutex_lock(&adev->srbm_mutex);
-	cik_srbm_select(adev, me, pipe, 0, 0);
-
-	WREG32_FIELD(CPC_INT_CNTL, TIME_STAMP_INT_ENABLE,
-			state == AMDGPU_IRQ_STATE_DISABLE ? 0 : 1);
-
-	cik_srbm_select(adev, 0, 0, 0, 0);
-	mutex_unlock(&adev->srbm_mutex);
+	switch (state) {
+	case AMDGPU_IRQ_STATE_DISABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl &= ~CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK;
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	case AMDGPU_IRQ_STATE_ENABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl |= CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK;
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	default:
+		break;
+	}
 }
 
 static int gfx_v7_0_set_priv_reg_fault_state(struct amdgpu_device *adev,

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -6610,26 +6610,51 @@ static void gfx_v8_0_set_compute_eop_interrupt_state(struct amdgpu_device *adev,
 						     int me, int pipe,
 						     enum amdgpu_interrupt_state state)
 {
-	/* Me 0 is reserved for graphics */
-	if (me < 1 || me > adev->gfx.mec.num_mec) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid me:%d\n", me);
+	u32 mec_int_cntl, mec_int_cntl_reg;
+
+	/*
+	 * amdgpu controls only the first MEC. That's why this function only
+	 * handles the setting of interrupts for this specific MEC. All other
+	 * pipes' interrupts are set by amdkfd.
+	 */
+
+	if (me == 1) {
+		switch (pipe) {
+		case 0:
+			mec_int_cntl_reg = mmCP_ME1_PIPE0_INT_CNTL;
+			break;
+		case 1:
+			mec_int_cntl_reg = mmCP_ME1_PIPE1_INT_CNTL;
+			break;
+		case 2:
+			mec_int_cntl_reg = mmCP_ME1_PIPE2_INT_CNTL;
+			break;
+		case 3:
+			mec_int_cntl_reg = mmCP_ME1_PIPE3_INT_CNTL;
+			break;
+		default:
+			DRM_DEBUG("invalid pipe %d\n", pipe);
 			return;
 		}
-
-	if (pipe >= adev->gfx.mec.num_pipe_per_mec) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid "
-				"me:%d pipe:%d\n", pipe, me);
+	} else {
+		DRM_DEBUG("invalid me %d\n", me);
 		return;
 	}
 
-	mutex_lock(&adev->srbm_mutex);
-	vi_srbm_select(adev, me, pipe, 0, 0);
-
-	WREG32_FIELD(CPC_INT_CNTL, TIME_STAMP_INT_ENABLE,
-			state == AMDGPU_IRQ_STATE_DISABLE ? 0 : 1);
-
-	vi_srbm_select(adev, 0, 0, 0, 0);
-	mutex_unlock(&adev->srbm_mutex);
+	switch (state) {
+	case AMDGPU_IRQ_STATE_DISABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl &= ~CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK;
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	case AMDGPU_IRQ_STATE_ENABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl |= CP_INT_CNTL_RING0__TIME_STAMP_INT_ENABLE_MASK;
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	default:
+		break;
+	}
 }
 
 static int gfx_v8_0_set_priv_reg_fault_state(struct amdgpu_device *adev,

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -3982,26 +3982,53 @@ static void gfx_v9_0_set_compute_eop_interrupt_state(struct amdgpu_device *adev,
 						     int me, int pipe,
 						     enum amdgpu_interrupt_state state)
 {
-	/* Me 0 is reserved for graphics */
-	if (me < 1 || me > adev->gfx.mec.num_mec) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid me:%d\n", me);
+	u32 mec_int_cntl, mec_int_cntl_reg;
+
+	/*
+	 * amdgpu controls only the first MEC. That's why this function only
+	 * handles the setting of interrupts for this specific MEC. All other
+	 * pipes' interrupts are set by amdkfd.
+	 */
+
+	if (me == 1) {
+		switch (pipe) {
+		case 0:
+			mec_int_cntl_reg = SOC15_REG_OFFSET(GC, 0, mmCP_ME1_PIPE0_INT_CNTL);
+			break;
+		case 1:
+			mec_int_cntl_reg = SOC15_REG_OFFSET(GC, 0, mmCP_ME1_PIPE1_INT_CNTL);
+			break;
+		case 2:
+			mec_int_cntl_reg = SOC15_REG_OFFSET(GC, 0, mmCP_ME1_PIPE2_INT_CNTL);
+			break;
+		case 3:
+			mec_int_cntl_reg = SOC15_REG_OFFSET(GC, 0, mmCP_ME1_PIPE3_INT_CNTL);
+			break;
+		default:
+			DRM_DEBUG("invalid pipe %d\n", pipe);
 			return;
 		}
-
-	if (pipe >= adev->gfx.mec.num_pipe_per_mec) {
-		DRM_ERROR("Ignoring request to enable interrupts for invalid "
-				"me:%d pipe:%d\n", pipe, me);
+	} else {
+		DRM_DEBUG("invalid me %d\n", me);
 		return;
 	}
 
-	mutex_lock(&adev->srbm_mutex);
-	soc15_grbm_select(adev, me, pipe, 0, 0);
-
-	WREG32_FIELD(CPC_INT_CNTL, TIME_STAMP_INT_ENABLE,
-			state == AMDGPU_IRQ_STATE_DISABLE ? 0 : 1);
-
-	soc15_grbm_select(adev, 0, 0, 0, 0);
-	mutex_unlock(&adev->srbm_mutex);
+	switch (state) {
+	case AMDGPU_IRQ_STATE_DISABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl = REG_SET_FIELD(mec_int_cntl, CP_ME1_PIPE0_INT_CNTL,
+					     TIME_STAMP_INT_ENABLE, 0);
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	case AMDGPU_IRQ_STATE_ENABLE:
+		mec_int_cntl = RREG32(mec_int_cntl_reg);
+		mec_int_cntl = REG_SET_FIELD(mec_int_cntl, CP_ME1_PIPE0_INT_CNTL,
+					     TIME_STAMP_INT_ENABLE, 1);
+		WREG32(mec_int_cntl_reg, mec_int_cntl);
+		break;
+	default:
+		break;
+	}
 }
 
 static int gfx_v9_0_set_priv_reg_fault_state(struct amdgpu_device *adev,