[PATCH 04/16] drm/msm/a6xx: Add support for Debug HFI Q

[Akhil P Oommen <akhilpo@oss.qualcomm.com>]

Add the Debug HFI Queue which contains the F2H messages posted from the
GMU firmware. Having this data in coredump is useful to debug firmware
issues.

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.h       |  2 +-
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c |  2 +-
 drivers/gpu/drm/msm/adreno/a6xx_hfi.c       | 16 +++++++++++++---
 drivers/gpu/drm/msm/adreno/a6xx_hfi.h       |  2 ++
 4 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
index 2af074c8e8cf..dd0614b19aac 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
@@ -110,7 +110,7 @@ struct a6xx_gmu {
 
 	unsigned long freq;
 
-	struct a6xx_hfi_queue queues[2];
+	struct a6xx_hfi_queue queues[HFI_MAX_QUEUES];
 
 	bool initialized;
 	bool hung;
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index d2d6b2fd3cba..018c164ad980 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -57,7 +57,7 @@ struct a6xx_gpu_state {
 	struct msm_gpu_state_bo *gmu_hfi;
 	struct msm_gpu_state_bo *gmu_debug;
 
-	s32 hfi_queue_history[2][HFI_HISTORY_SZ];
+	s32 hfi_queue_history[HFI_MAX_QUEUES][HFI_HISTORY_SZ];
 
 	struct list_head objs;
 
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
index 53cfdf4e6c34..2daaa340366d 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
@@ -1056,8 +1056,8 @@ void a6xx_hfi_init(struct a6xx_gmu *gmu)
 	struct a6xx_gmu_bo *hfi = &gmu->hfi;
 	struct a6xx_hfi_queue_table_header *table = hfi->virt;
 	struct a6xx_hfi_queue_header *headers = hfi->virt + sizeof(*table);
+	int table_size, idx;
 	u64 offset;
-	int table_size;
 
 	/*
 	 * The table size is the size of the table header plus all of the queue
@@ -1076,12 +1076,22 @@ void a6xx_hfi_init(struct a6xx_gmu *gmu)
 	table->active_queues = ARRAY_SIZE(gmu->queues);
 
 	/* Command queue */
+	idx = 0;
 	offset = SZ_4K;
-	a6xx_hfi_queue_init(&gmu->queues[0], &headers[0], hfi->virt + offset,
+	a6xx_hfi_queue_init(&gmu->queues[idx], &headers[idx], hfi->virt + offset,
 		hfi->iova + offset, 0);
 
 	/* GMU response queue */
+	idx++;
 	offset += SZ_4K;
-	a6xx_hfi_queue_init(&gmu->queues[1], &headers[1], hfi->virt + offset,
+	a6xx_hfi_queue_init(&gmu->queues[idx], &headers[idx], hfi->virt + offset,
 		hfi->iova + offset, gmu->legacy ? 4 : 1);
+
+	/* GMU Debug queue */
+	idx++;
+	offset += SZ_4K;
+	a6xx_hfi_queue_init(&gmu->queues[idx], &headers[idx], hfi->virt + offset,
+		hfi->iova + offset, gmu->legacy ? 5 : 2);
+
+	WARN_ON(idx >= HFI_MAX_QUEUES);
 }
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.h b/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
index 6f9f74a0bc85..19f6eca2c8c9 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.h
@@ -4,6 +4,8 @@
 #ifndef _A6XX_HFI_H_
 #define _A6XX_HFI_H_
 
+#define HFI_MAX_QUEUES 3
+
 struct a6xx_hfi_queue_table_header {
 	u32 version;
 	u32 size;		/* Size of the queue table in dwords */

-- 
2.51.0