Commit 08d1bdd4 authored by Rex Zhu's avatar Rex Zhu Committed by Alex Deucher
Browse files

drm/amdgpu: Limit vm max ctx number to 4096 



driver need to reserve resource for each ctx for
some hw features. so add this limitation.

Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 31edd7c0

drivers/gpu/drm/amd/amdgpu/amdgpu.h

+1 −0
Original line number Diff line number Diff line
@@ -164,6 +164,7 @@ extern int amdgpu_si_support; 
extern int amdgpu_cik_support;

#endif



#define AMDGPU_VM_MAX_NUM_CTX			4096

#define AMDGPU_SG_THRESHOLD			(256*1024*1024)

#define AMDGPU_DEFAULT_GTT_SIZE_MB		3072ULL /* 3GB by default */

#define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS	        3000

drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c

+1 −1
Original line number Diff line number Diff line
@@ -248,7 +248,7 @@ static int amdgpu_ctx_alloc(struct amdgpu_device *adev, 
		return -ENOMEM;



	mutex_lock(&mgr->lock);

	r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);

	r = idr_alloc(&mgr->ctx_handles, ctx, 1, AMDGPU_VM_MAX_NUM_CTX, GFP_KERNEL);

	if (r < 0) {

		mutex_unlock(&mgr->lock);

		kfree(ctx);

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