[PATCH 18/31] drm/amdgpu/gfx12: recalculate available compute rings to use

[Alex Deucher]

From: Jack Xiao <Jack.Xiao at amd.com>

Recalculate the number of compute rings to use based on
the gfx hardware configuration. As needed reserve half of
compute rings for mes, kgd can't use up all compute rings.

Signed-off-by: Jack Xiao <Jack.Xiao at amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
index f3f8601d6e184..06244d97c2831 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c
@@ -1103,6 +1103,7 @@ static int gfx_v12_0_rlc_backdoor_autoload_enable(struct amdgpu_device *adev)
 static int gfx_v12_0_sw_init(void *handle)
 {
 	int i, j, k, r, ring_id = 0;
+	unsigned num_compute_rings;
 	int xcc_id = 0;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
@@ -1126,6 +1127,12 @@ static int gfx_v12_0_sw_init(void *handle)
 		break;
 	}
 
+	/* recalculate compute rings to use based on hardware configuration */
+	num_compute_rings = (adev->gfx.mec.num_pipe_per_mec *
+			     adev->gfx.mec.num_queue_per_pipe) / 2;
+	adev->gfx.num_compute_rings = min(adev->gfx.num_compute_rings,
+					  num_compute_rings);
+
 	/* EOP Event */
 	r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_GRBM_CP,
 			      GFX_11_0_0__SRCID__CP_EOP_INTERRUPT,
-- 
2.44.0