[PATCH 3/7 v2] drm/amdgpu/mes12: Implement reset sdmav7 queue function by mmio

[Jesse.zhang@amd.com]

Reset sdma queue through mmio based on me_id and queue_id.

Signed-off-by: Jesse Zhang <jesse.zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/mes_v12_0.c | 46 ++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
index c63b3053eb7d..0f6635ee84a5 100644
--- a/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v12_0.c
@@ -350,6 +350,47 @@ static int mes_v12_0_remove_hw_queue(struct amdgpu_mes *mes,
 			offsetof(union MESAPI__REMOVE_QUEUE, api_status));
 }
 
+static int mes_v12_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, reg;
+	int i, r = 0;
+
+	amdgpu_gfx_rlc_enter_safe_mode(adev, 0);
+
+	if (queue_type == AMDGPU_RING_TYPE_SDMA) {
+		dev_info(adev->dev, "reset sdma queue (%d:%d:%d)\n",
+			 me_id, pipe_id, queue_id);
+		switch (me_id) {
+		case 1:
+			reg = SOC15_REG_OFFSET(GC, 0, regSDMA1_QUEUE_RESET_REQ);
+			break;
+		case 0:
+		default:
+			reg = SOC15_REG_OFFSET(GC, 0, regSDMA0_QUEUE_RESET_REQ);
+			break;
+		}
+
+		value = 1 << queue_id;
+		WREG32(reg, value);
+		/* wait for queue reset done */
+		for (i = 0; i < adev->usec_timeout; i++) {
+			if (!(RREG32(reg) & value))
+				break;
+			udelay(1);
+		}
+		if (i >= adev->usec_timeout) {
+			dev_err(adev->dev, "failed to wait on sdma queue reset done\n");
+			r = -ETIMEDOUT;
+		}
+	}
+
+	amdgpu_gfx_rlc_exit_safe_mode(adev, 0);
+	return r;
+}
+
 static int mes_v12_0_reset_hw_queue(struct amdgpu_mes *mes,
 				    struct mes_reset_queue_input *input)
 {
@@ -730,6 +771,11 @@ static int mes_v12_0_reset_legacy_queue(struct amdgpu_mes *mes,
 	union MESAPI__RESET mes_reset_queue_pkt;
 	int pipe;
 
+	if (input->use_mmio)
+		return mes_v12_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;
-- 
2.25.1