[PATCH 11/29] drm/amdkfd: Store drm node minor number for kfd nodes

[Alex Deucher]

From: Philip Yang <Philip.Yang at amd.com>

>From KFD topology, application will find kfd node with the corresponding
drm device node minor number, for example if partition drm node starts
from /dev/dri/renderD129, then KFD node 0 with store drm node minor
number 129. Application will open drm node /dev/dri/renderD129 to create
amdgpu vm for kfd node 0 with the correct vm->mem_id to indicate the
memory partition.

Signed-off-by: Philip Yang <Philip.Yang at amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_topology.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 6d6243b978e1..a8e25aecf839 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -1942,8 +1942,12 @@ int kfd_topology_add_device(struct kfd_node *gpu)
 		amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->adev);
 	dev->node_props.max_engine_clk_ccompute =
 		cpufreq_quick_get_max(0) / 1000;
-	dev->node_props.drm_render_minor =
-		gpu->kfd->shared_resources.drm_render_minor;
+
+	if (gpu->xcp)
+		dev->node_props.drm_render_minor = gpu->xcp->ddev->render->index;
+	else
+		dev->node_props.drm_render_minor =
+				gpu->kfd->shared_resources.drm_render_minor;
 
 	dev->node_props.hive_id = gpu->kfd->hive_id;
 	dev->node_props.num_sdma_engines = kfd_get_num_sdma_engines(gpu);
-- 
2.40.1