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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.
*
*/
#ifndef __AMDGPU_RESET_H__
#define __AMDGPU_RESET_H__
#include "amdgpu.h"
#define AMDGPU_RESET_MAX_HANDLERS 5
enum AMDGPU_RESET_FLAGS {
AMDGPU_NEED_FULL_RESET = 0,
AMDGPU_SKIP_HW_RESET = 1,
AMDGPU_SKIP_COREDUMP = 2,
AMDGPU_HOST_FLR = 3,
};
enum AMDGPU_RESET_SRCS {
AMDGPU_RESET_SRC_UNKNOWN,
AMDGPU_RESET_SRC_JOB,
AMDGPU_RESET_SRC_RAS,
AMDGPU_RESET_SRC_MES,
AMDGPU_RESET_SRC_HWS,
AMDGPU_RESET_SRC_USER,
};
struct amdgpu_reset_context {
enum amd_reset_method method;
struct amdgpu_device *reset_req_dev;
struct amdgpu_job *job;
struct amdgpu_hive_info *hive;
struct list_head *reset_device_list;
unsigned long flags;
enum AMDGPU_RESET_SRCS src;
};
struct amdgpu_reset_handler {
enum amd_reset_method reset_method;
int (*prepare_env)(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
int (*prepare_hwcontext)(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
int (*perform_reset)(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
int (*restore_hwcontext)(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
int (*restore_env)(struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
int (*do_reset)(struct amdgpu_device *adev);
};
struct amdgpu_reset_control {
void *handle;
struct work_struct reset_work;
struct mutex reset_lock;
struct amdgpu_reset_handler *(
*reset_handlers)[AMDGPU_RESET_MAX_HANDLERS];
atomic_t in_reset;
enum amd_reset_method active_reset;
struct amdgpu_reset_handler *(*get_reset_handler)(
struct amdgpu_reset_control *reset_ctl,
struct amdgpu_reset_context *context);
void (*async_reset)(struct work_struct *work);
};
enum amdgpu_reset_domain_type {
SINGLE_DEVICE,
XGMI_HIVE
};
struct amdgpu_reset_domain {
struct kref refcount;
struct workqueue_struct *wq;
enum amdgpu_reset_domain_type type;
struct rw_semaphore sem;
atomic_t in_gpu_reset;
atomic_t reset_res;
};
int amdgpu_reset_init(struct amdgpu_device *adev);
int amdgpu_reset_fini(struct amdgpu_device *adev);
int amdgpu_reset_prepare_hwcontext(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context);
int amdgpu_reset_perform_reset(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context);
int amdgpu_reset_prepare_env(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context);
int amdgpu_reset_restore_env(struct amdgpu_device *adev,
struct amdgpu_reset_context *reset_context);
struct amdgpu_reset_domain *amdgpu_reset_create_reset_domain(enum amdgpu_reset_domain_type type,
char *wq_name);
void amdgpu_reset_destroy_reset_domain(struct kref *ref);
static inline bool amdgpu_reset_get_reset_domain(struct amdgpu_reset_domain *domain)
{
return kref_get_unless_zero(&domain->refcount) != 0;
}
static inline void amdgpu_reset_put_reset_domain(struct amdgpu_reset_domain *domain)
{
if (domain)
kref_put(&domain->refcount, amdgpu_reset_destroy_reset_domain);
}
static inline bool amdgpu_reset_domain_schedule(struct amdgpu_reset_domain *domain,
struct work_struct *work)
{
return queue_work(domain->wq, work);
}
void amdgpu_device_lock_reset_domain(struct amdgpu_reset_domain *reset_domain);
void amdgpu_device_unlock_reset_domain(struct amdgpu_reset_domain *reset_domain);
void amdgpu_reset_get_desc(struct amdgpu_reset_context *rst_ctxt, char *buf,
size_t len);
#define for_each_handler(i, handler, reset_ctl) \
for (i = 0; (i < AMDGPU_RESET_MAX_HANDLERS) && \
(handler = (*reset_ctl->reset_handlers)[i]); \
++i)
#endif
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