[PATCH 037/459] drm/amdgpu: acquire available gfx queues

[Alex Deucher]

From: Hawking Zhang <Hawking.Zhang at amd.com>

currently, amdgpu will owns the first gfx queue of each pipe
they are:
me:0 pipe:0 queue:0
me:0 pipe:1 queue:0

Signed-off-by: Hawking Zhang <Hawking.Zhang at amd.com>
Reviewed-by: Jack Xiao <jack.xiao at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c | 24 ++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
index 997932ebbb83..855eff834e2a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
@@ -199,6 +199,30 @@ void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev)
 		adev->gfx.num_compute_rings = AMDGPU_MAX_COMPUTE_RINGS;
 }
 
+void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev)
+{
+	int i, queue, pipe, me;
+
+	for (i = 0; i < AMDGPU_MAX_GFX_QUEUES; ++i) {
+		queue = i % adev->gfx.me.num_queue_per_pipe;
+		pipe = (i / adev->gfx.me.num_queue_per_pipe)
+			% adev->gfx.me.num_pipe_per_me;
+		me = (i / adev->gfx.me.num_queue_per_pipe)
+		      / adev->gfx.me.num_pipe_per_me;
+
+		if (me >= adev->gfx.me.num_me)
+			break;
+		/* policy: amdgpu owns the first queue per pipe at this stage
+		 * will extend to mulitple queues per pipe later */
+		if (me == 0 && queue < 1)
+			set_bit(i, adev->gfx.me.queue_bitmap);
+	}
+
+	/* update the number of active graphics rings */
+	adev->gfx.num_gfx_rings =
+		bitmap_weight(adev->gfx.me.queue_bitmap, AMDGPU_MAX_GFX_QUEUES);
+}
+
 static int amdgpu_gfx_kiq_acquire(struct amdgpu_device *adev,
 				  struct amdgpu_ring *ring)
 {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
index 68f7d3cf4fa2..1c5d12eae5a6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
@@ -335,6 +335,8 @@ int amdgpu_gfx_compute_mqd_sw_init(struct amdgpu_device *adev,
 void amdgpu_gfx_compute_mqd_sw_fini(struct amdgpu_device *adev);
 
 void amdgpu_gfx_compute_queue_acquire(struct amdgpu_device *adev);
+void amdgpu_gfx_graphics_queue_acquire(struct amdgpu_device *adev);
+
 int amdgpu_gfx_queue_to_bit(struct amdgpu_device *adev, int mec,
 			    int pipe, int queue);
 void amdgpu_gfx_bit_to_queue(struct amdgpu_device *adev, int bit,
-- 
2.20.1