forked from Minki/linux
6d82eb0ef2
Modify kfd_topology_enum_kfd_devices(..) function to support non-GPU nodes. The function returned NULL when it encountered non-GPU (say CPU) nodes. This caused kfd_ioctl_create_event and kfd_init_apertures to fail for Intel + Tonga. kfd_topology_enum_kfd_devices will now parse all the nodes and return valid kfd_dev for nodes with GPU. Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com> Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
|
|
* Copyright 2014 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"
|
|
|
|
static unsigned int pasid_bits = 16;
|
|
static const struct kfd2kgd_calls *kfd2kgd;
|
|
|
|
bool kfd_set_pasid_limit(unsigned int new_limit)
|
|
{
|
|
if (new_limit < 2)
|
|
return false;
|
|
|
|
if (new_limit < (1U << pasid_bits)) {
|
|
if (kfd2kgd)
|
|
/* 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;
|
|
}
|
|
|
|
unsigned int kfd_pasid_alloc(void)
|
|
{
|
|
int r;
|
|
|
|
/* Find the first best KFD device for calling KGD */
|
|
if (!kfd2kgd) {
|
|
struct kfd_dev *dev = NULL;
|
|
unsigned int i = 0;
|
|
|
|
while ((kfd_topology_enum_kfd_devices(i, &dev)) == 0) {
|
|
if (dev && dev->kfd2kgd) {
|
|
kfd2kgd = dev->kfd2kgd;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
if (!kfd2kgd)
|
|
return false;
|
|
}
|
|
|
|
r = kfd2kgd->alloc_pasid(pasid_bits);
|
|
|
|
return r > 0 ? r : 0;
|
|
}
|
|
|
|
void kfd_pasid_free(unsigned int pasid)
|
|
{
|
|
if (kfd2kgd)
|
|
kfd2kgd->free_pasid(pasid);
|
|
}
|