[PATCH 36/53] drm/amdgpu/mes11: implement mmio queue reset for gfx11

[Alex Deucher]

From: Jiadong Zhu <Jiadong.Zhu at amd.com>

Implement queue reset for graphic and compute queue.

v2: use amdgpu_gfx_rlc funcs to enter/exit safe mode.
v3: use gfx_v11_0_request_gfx_index_mutex()

Signed-off-by: Jiadong Zhu <Jiadong.Zhu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/mes_v11_0.c | 78 ++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index afb40d70e41e..c4bbd2f95fd5 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -26,6 +26,7 @@
 #include "amdgpu.h"
 #include "soc15_common.h"
 #include "soc21.h"
+#include "gfx_v11_0.h"
 #include "gc/gc_11_0_0_offset.h"
 #include "gc/gc_11_0_0_sh_mask.h"
 #include "gc/gc_11_0_0_default.h"
@@ -360,9 +361,81 @@ static int mes_v11_0_remove_hw_queue(struct amdgpu_mes *mes,
 			offsetof(union MESAPI__REMOVE_QUEUE, api_status));
 }
 
+static int mes_v11_0_reset_queue_mmio(struct amdgpu_mes *mes, uint32_t queue_type,
+				      uint32_t me_id, uint32_t pipe_id,
+				      uint32_t queue_id, uint32_t vmid)
+{
+	struct amdgpu_device *adev = mes->adev;
+	uint32_t value;
+	int i, r = 0;
+
+	amdgpu_gfx_rlc_enter_safe_mode(adev, 0);
+
+	if (queue_type == AMDGPU_RING_TYPE_GFX) {
+		dev_info(adev->dev, "reset gfx queue (%d:%d:%d: vmid:%d)\n",
+			 me_id, pipe_id, queue_id, vmid);
+
+		gfx_v11_0_request_gfx_index_mutex(adev, true);
+		/* all se allow writes */
+		WREG32_SOC15(GC, 0, regGRBM_GFX_INDEX,
+			     (uint32_t)(0x1 << GRBM_GFX_INDEX__SE_BROADCAST_WRITES__SHIFT));
+		value = REG_SET_FIELD(0, CP_VMID_RESET, RESET_REQUEST, 1 << vmid);
+		if (pipe_id == 0)
+			value = REG_SET_FIELD(value, CP_VMID_RESET, PIPE0_QUEUES, 1 << queue_id);
+		else
+			value = REG_SET_FIELD(value, CP_VMID_RESET, PIPE1_QUEUES, 1 << queue_id);
+		WREG32_SOC15(GC, 0, regCP_VMID_RESET, value);
+		gfx_v11_0_request_gfx_index_mutex(adev, false);
+
+		mutex_lock(&adev->srbm_mutex);
+		soc21_grbm_select(adev, me_id, pipe_id, queue_id, 0);
+		/* wait till dequeue take effects */
+		for (i = 0; i < adev->usec_timeout; i++) {
+			if (!(RREG32_SOC15(GC, 0, regCP_GFX_HQD_ACTIVE) & 1))
+				break;
+			udelay(1);
+		}
+		if (i >= adev->usec_timeout){
+			dev_err(adev->dev, "failed to wait on gfx hqd deactive\n");
+			r = -ETIMEDOUT;
+		}
+
+		soc21_grbm_select(adev, 0, 0, 0, 0);
+		mutex_unlock(&adev->srbm_mutex);
+	} else if (queue_type == AMDGPU_RING_TYPE_COMPUTE) {
+		dev_info(adev->dev, "reset compute queue (%d:%d:%d)\n",
+			 me_id, pipe_id, queue_id);
+		mutex_lock(&adev->srbm_mutex);
+		soc21_grbm_select(adev, me_id, pipe_id, queue_id, 0);
+		WREG32_SOC15(GC, 0, regCP_HQD_DEQUEUE_REQUEST, 0x2);
+		WREG32_SOC15(GC, 0, regSPI_COMPUTE_QUEUE_RESET, 0x1);
+
+		/* wait till dequeue take effects */
+		for (i = 0; i < adev->usec_timeout; i++) {
+			if (!(RREG32_SOC15(GC, 0, regCP_HQD_ACTIVE) & 1))
+			break;
+			udelay(1);
+		}
+		if (i >= adev->usec_timeout){
+			dev_err(adev->dev, "failed to wait on hqd deactive\n");
+			r = -ETIMEDOUT;
+		}
+		soc21_grbm_select(adev, 0, 0, 0, 0);
+		mutex_unlock(&adev->srbm_mutex);
+	}
+
+	amdgpu_gfx_rlc_exit_safe_mode(adev, 0);
+	return r;
+}
+
 static int mes_v11_0_reset_hw_queue(struct amdgpu_mes *mes,
 				    struct mes_reset_queue_input *input)
 {
+	if (input->use_mmio)
+		return mes_v11_0_reset_queue_mmio(mes, input->queue_type,
+						  input->me_id, input->pipe_id,
+						  input->queue_id, input->vmid);
+
 	union MESAPI__RESET mes_reset_queue_pkt;
 
 	memset(&mes_reset_queue_pkt, 0, sizeof(mes_reset_queue_pkt));
@@ -622,6 +695,11 @@ static int mes_v11_0_reset_legacy_queue(struct amdgpu_mes *mes,
 {
 	union MESAPI__RESET mes_reset_queue_pkt;
 
+	if (input->use_mmio)
+		return mes_v11_0_reset_queue_mmio(mes, input->queue_type,
+						  input->me_id, input->pipe_id,
+						  input->queue_id, input->vmid);
+
 	memset(&mes_reset_queue_pkt, 0, sizeof(mes_reset_queue_pkt));
 
 	mes_reset_queue_pkt.header.type = MES_API_TYPE_SCHEDULER;
-- 
2.45.2