d87f36a063
Update the SPDX License header for all the KFD files. Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
|
/*
|
|
* Copyright 2014-2022 Advanced Micro Devices, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include "kfd_priv.h"
|
|
#include "amdgpu_ids.h"
|
|
|
|
static unsigned int pasid_bits = 16;
|
|
static bool pasids_allocated; /* = false */
|
|
|
|
bool kfd_set_pasid_limit(unsigned int new_limit)
|
|
{
|
|
if (new_limit < 2)
|
|
return false;
|
|
|
|
if (new_limit < (1U << pasid_bits)) {
|
|
if (pasids_allocated)
|
|
/* We've already allocated user PASIDs, too late to
|
|
* change the limit
|
|
*/
|
|
return false;
|
|
|
|
while (new_limit < (1U << pasid_bits))
|
|
pasid_bits--;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
unsigned int kfd_get_pasid_limit(void)
|
|
{
|
|
return 1U << pasid_bits;
|
|
}
|
|
|
|
u32 kfd_pasid_alloc(void)
|
|
{
|
|
int r = amdgpu_pasid_alloc(pasid_bits);
|
|
|
|
if (r > 0) {
|
|
pasids_allocated = true;
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kfd_pasid_free(u32 pasid)
|
|
{
|
|
amdgpu_pasid_free(pasid);
|
|
}
|