drm/amdgpu: fix compute queue priority if num_kcq is less than 4

Compute queues are configurable with module param, num_kcq.
amdgpu_gfx_is_high_priority_compute_queue was setting 1st 4 queues to
high priority queue leaving a null drm scheduler in
adev->gpu_sched[hw_ip]["normal_prio"].sched if num_kcq < 5.

This patch tries to fix it by alternating compute queue priority between
normal and high priority.

Fixes: 33abcb1f5a1719b1c (drm/amdgpu: set compute queue priority at mqd_init)
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index e584f48..97a8f78 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -193,10 +193,14 @@ static bool amdgpu_gfx_is_multipipe_capable(struct amdgpu_device *adev)
 }
 
 bool amdgpu_gfx_is_high_priority_compute_queue(struct amdgpu_device *adev,
-                                              int queue)
+                                              int pipe, int queue)
 {
-       /* Policy: make queue 0 of each pipe as high priority compute queue */
-       return (queue == 0);
+       bool multipipe_policy = amdgpu_gfx_is_multipipe_capable(adev);
+       int cond;
+       /* Policy: alternate between normal and high priority */
+       cond = multipipe_policy ? pipe : queue;
+
+       return ((cond % 2) != 0);
 
 }
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
index 786eb4a..671d4b3 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
@@ -374,7 +374,7 @@ void amdgpu_queue_mask_bit_to_mec_queue(struct amdgpu_device *adev, int bit,
 bool amdgpu_gfx_is_mec_queue_enabled(struct amdgpu_device *adev, int mec,
                                     int pipe, int queue);
 bool amdgpu_gfx_is_high_priority_compute_queue(struct amdgpu_device *adev,
-                                              int queue);
+                                              int pipe, int queue);
 int amdgpu_gfx_me_queue_to_bit(struct amdgpu_device *adev, int me,
                               int pipe, int queue);
 void amdgpu_gfx_bit_to_me_queue(struct amdgpu_device *adev, int bit,

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index e068133..270b502 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -4473,7 +4473,8 @@ static int gfx_v10_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
        irq_type = AMDGPU_CP_IRQ_COMPUTE_MEC1_PIPE0_EOP
                + ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
                + ring->pipe;
-       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+                                                           ring->queue) ?
                        AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_GFX_PIPE_PRIO_NORMAL;
        /* type-2 packets are deprecated on MEC, use type-3 instead */
        r = amdgpu_ring_init(adev, ring, 1024,
@@ -6508,7 +6509,8 @@ static void gfx_v10_0_compute_mqd_set_priority(struct amdgpu_ring *ring, struct
        struct amdgpu_device *adev = ring->adev;
 
        if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
-               if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+               if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+                                                             ring->queue)) {
                        mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
                        mqd->cp_hqd_queue_priority =
                                AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index c3fff49..5e6d15f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -1923,7 +1923,8 @@ static int gfx_v8_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
                + ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
                + ring->pipe;
 
-       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+                                                           ring->queue) ?
                        AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_RING_PRIO_DEFAULT;
        /* type-2 packets are deprecated on MEC, use type-3 instead */
        r = amdgpu_ring_init(adev, ring, 1024,
@@ -4441,7 +4442,8 @@ static void gfx_v8_0_mqd_set_priority(struct amdgpu_ring *ring, struct vi_mqd *m
        struct amdgpu_device *adev = ring->adev;
 
        if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
-               if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+               if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+                                                             ring->queue)) {
                        mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
                        mqd->cp_hqd_queue_priority =
                                AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 3d6fb5a..5d53baa 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2228,7 +2228,8 @@ static int gfx_v9_0_compute_ring_init(struct amdgpu_device *adev, int ring_id,
        irq_type = AMDGPU_CP_IRQ_COMPUTE_MEC1_PIPE0_EOP
                + ((ring->me - 1) * adev->gfx.mec.num_pipe_per_mec)
                + ring->pipe;
-       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue) ?
+       hw_prio = amdgpu_gfx_is_high_priority_compute_queue(adev, ring->pipe,
+                                                           ring->queue) ?
                        AMDGPU_GFX_PIPE_PRIO_HIGH : AMDGPU_GFX_PIPE_PRIO_NORMAL;
        /* type-2 packets are deprecated on MEC, use type-3 instead */
        return amdgpu_ring_init(adev, ring, 1024,
@@ -3383,7 +3384,9 @@ static void gfx_v9_0_mqd_set_priority(struct amdgpu_ring *ring, struct v9_mqd *m
        struct amdgpu_device *adev = ring->adev;
 
        if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE) {
-               if (amdgpu_gfx_is_high_priority_compute_queue(adev, ring->queue)) {
+               if (amdgpu_gfx_is_high_priority_compute_queue(adev,
+                                                             ring->pipe,
+                                                             ring->queue)) {
                        mqd->cp_hqd_pipe_priority = AMDGPU_GFX_PIPE_PRIO_HIGH;
                        mqd->cp_hqd_queue_priority =
                                AMDGPU_GFX_QUEUE_PRIORITY_MAXIMUM;