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/*
* Copyright 2021 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 "amdgpu_reset.h"
#include "aldebaran.h"
int amdgpu_reset_add_handler(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_handler *handler)
{
/* TODO: Check if handler exists? */
list_add_tail(&handler->handler_list, &reset_ctl->reset_handlers);
return 0;
}
int amdgpu_reset_init(struct amdgpu_device *adev)
{
int ret = 0;
switch (adev->ip_versions[MP1_HWIP][0]) {
case IP_VERSION(13, 0, 2):
ret = aldebaran_reset_init(adev);
break;
default:
break;
}
return ret;
}
int amdgpu_reset_fini(struct amdgpu_device *adev)
{
int ret = 0;
switch (adev->ip_versions[MP1_HWIP][0]) {
case IP_VERSION(13, 0, 2):
ret = aldebaran_reset_fini(adev);
break;
default:
break;
}
return ret;
}
int amdgpu_reset_prepare_hwcontext(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context)
{
struct amdgpu_reset_handler *reset_handler = NULL;
if (adev->reset_cntl && adev->reset_cntl->get_reset_handler)
reset_handler = adev->reset_cntl->get_reset_handler(
adev->reset_cntl, reset_context);
if (!reset_handler)
return -ENOSYS;
return reset_handler->prepare_hwcontext(adev->reset_cntl,
reset_context);
}
int amdgpu_reset_perform_reset(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context)
{
int ret;
struct amdgpu_reset_handler *reset_handler = NULL;
if (adev->reset_cntl)
reset_handler = adev->reset_cntl->get_reset_handler(
adev->reset_cntl, reset_context);
if (!reset_handler)
return -ENOSYS;
ret = reset_handler->perform_reset(adev->reset_cntl, reset_context);
if (ret)
return ret;
return reset_handler->restore_hwcontext(adev->reset_cntl,
reset_context);
}
void amdgpu_reset_destroy_reset_domain(struct kref *ref)
{
struct amdgpu_reset_domain *reset_domain = container_of(ref,
struct amdgpu_reset_domain,
refcount);
if (reset_domain->wq)
destroy_workqueue(reset_domain->wq);
kvfree(reset_domain);
}
struct amdgpu_reset_domain *amdgpu_reset_create_reset_domain(enum amdgpu_reset_domain_type type,
char *wq_name)
{
struct amdgpu_reset_domain *reset_domain;
reset_domain = kvzalloc(sizeof(struct amdgpu_reset_domain), GFP_KERNEL);
if (!reset_domain) {
DRM_ERROR("Failed to allocate amdgpu_reset_domain!");
return NULL;
}
reset_domain->type = type;
kref_init(&reset_domain->refcount);
reset_domain->wq = create_singlethread_workqueue(wq_name);
if (!reset_domain->wq) {
DRM_ERROR("Failed to allocate wq for amdgpu_reset_domain!");
amdgpu_reset_put_reset_domain(reset_domain);
return NULL;
}
atomic_set(&reset_domain->in_gpu_reset, 0);
init_rwsem(&reset_domain->sem);
return reset_domain;
}
void amdgpu_device_lock_reset_domain(struct amdgpu_reset_domain *reset_domain)
{
atomic_set(&reset_domain->in_gpu_reset, 1);
down_write(&reset_domain->sem);
}
void amdgpu_device_unlock_reset_domain(struct amdgpu_reset_domain *reset_domain)
{
atomic_set(&reset_domain->in_gpu_reset, 0);
up_write(&reset_domain->sem);
}
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