Commit 9b37d45d authored by Rajneesh Bhardwaj's avatar Rajneesh Bhardwaj Committed by Alex Deucher
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drm/amdgpu: Rework KFD memory max limits 



To allow bigger allocations specially on systems such as GFXIP 9.4.3
that use GTT memory for VRAM allocations, relax the limits to
maximize ROCm allocations.

Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: default avatarRajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 67318cb8

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

+8 −2
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ 
 * changes to accumulate

 */

#define AMDGPU_USERPTR_RESTORE_DELAY_MS 1

#define AMDGPU_RESERVE_MEM_LIMIT			(3UL << 29)



/*

 * Align VRAM availability to 2MB to avoid fragmentation caused by 4K allocations in the tail 2MB
@@ -117,11 +118,16 @@ void amdgpu_amdkfd_gpuvm_init_mem_limits(void) 
		return;



	si_meminfo(&si);

	mem = si.freeram - si.freehigh;

	mem = si.totalram - si.totalhigh;

	mem *= si.mem_unit;



	spin_lock_init(&kfd_mem_limit.mem_limit_lock);

	kfd_mem_limit.max_system_mem_limit = mem - (mem >> 4);

	kfd_mem_limit.max_system_mem_limit = mem - (mem >> 6);

	if (kfd_mem_limit.max_system_mem_limit < 2 * AMDGPU_RESERVE_MEM_LIMIT)

		kfd_mem_limit.max_system_mem_limit >>= 1;

	else

		kfd_mem_limit.max_system_mem_limit -= AMDGPU_RESERVE_MEM_LIMIT;



	kfd_mem_limit.max_ttm_mem_limit = ttm_tt_pages_limit() << PAGE_SHIFT;

	pr_debug("Kernel memory limit %lluM, TTM limit %lluM\n",

		(kfd_mem_limit.max_system_mem_limit >> 20),