1 // SPDX-License-Identifier: GPL-2.0 OR MIT
3 * Copyright 2014-2022 Advanced Micro Devices, Inc.
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6 * copy of this software and associated documentation files (the "Software"),
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9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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24 #include <linux/types.h>
26 #include "amdgpu_ids.h"
28 static unsigned int pasid_bits = 16;
29 static bool pasids_allocated; /* = false */
31 bool kfd_set_pasid_limit(unsigned int new_limit)
36 if (new_limit < (1U << pasid_bits)) {
38 /* We've already allocated user PASIDs, too late to
43 while (new_limit < (1U << pasid_bits))
50 unsigned int kfd_get_pasid_limit(void)
52 return 1U << pasid_bits;
55 u32 kfd_pasid_alloc(void)
57 int r = amdgpu_pasid_alloc(pasid_bits);
60 pasids_allocated = true;
67 void kfd_pasid_free(u32 pasid)
69 amdgpu_pasid_free(pasid);