linux/drivers/gpu/drm/amd/amdkfd/kfd_smi_events.c

// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
 * Copyright 2020-2022 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/poll.h>
#include <linux/wait.h>
#include <linux/anon_inodes.h>
#include <uapi/linux/kfd_ioctl.h>
#include "amdgpu.h"
#include "amdgpu_vm.h"
#include "kfd_priv.h"
#include "kfd_smi_events.h"
#include "amdgpu_reset.h"

struct kfd_smi_client { … };

#define MAX_KFIFO_SIZE …

static __poll_t kfd_smi_ev_poll(struct file *, struct poll_table_struct *);
static ssize_t kfd_smi_ev_read(struct file *, char __user *, size_t, loff_t *);
static ssize_t kfd_smi_ev_write(struct file *, const char __user *, size_t,
				loff_t *);
static int kfd_smi_ev_release(struct inode *, struct file *);

static const char kfd_smi_name[] = …;

static const struct file_operations kfd_smi_ev_fops = …;

static __poll_t kfd_smi_ev_poll(struct file *filep,
				struct poll_table_struct *wait)
{ … }

static ssize_t kfd_smi_ev_read(struct file *filep, char __user *user,
			       size_t size, loff_t *offset)
{ … }

static ssize_t kfd_smi_ev_write(struct file *filep, const char __user *user,
				size_t size, loff_t *offset)
{ … }

static void kfd_smi_ev_client_free(struct rcu_head *p)
{ … }

static int kfd_smi_ev_release(struct inode *inode, struct file *filep)
{ … }

static bool kfd_smi_ev_enabled(pid_t pid, struct kfd_smi_client *client,
			       unsigned int event)
{ … }

static void add_event_to_kfifo(pid_t pid, struct kfd_node *dev,
			       unsigned int smi_event, char *event_msg, int len)
{ … }

__printf(4, 5)
static void kfd_smi_event_add(pid_t pid, struct kfd_node *dev,
			      unsigned int event, char *fmt, ...)
{ … }

void kfd_smi_event_update_gpu_reset(struct kfd_node *dev, bool post_reset,
				    struct amdgpu_reset_context *reset_context)
{ … }

void kfd_smi_event_update_thermal_throttling(struct kfd_node *dev,
					     uint64_t throttle_bitmask)
{ … }

void kfd_smi_event_update_vmfault(struct kfd_node *dev, uint16_t pasid)
{ … }

void kfd_smi_event_page_fault_start(struct kfd_node *node, pid_t pid,
				    unsigned long address, bool write_fault,
				    ktime_t ts)
{ … }

void kfd_smi_event_page_fault_end(struct kfd_node *node, pid_t pid,
				  unsigned long address, bool migration)
{ … }

void kfd_smi_event_migration_start(struct kfd_node *node, pid_t pid,
				   unsigned long start, unsigned long end,
				   uint32_t from, uint32_t to,
				   uint32_t prefetch_loc, uint32_t preferred_loc,
				   uint32_t trigger)
{ … }

void kfd_smi_event_migration_end(struct kfd_node *node, pid_t pid,
				 unsigned long start, unsigned long end,
				 uint32_t from, uint32_t to, uint32_t trigger)
{ … }

void kfd_smi_event_queue_eviction(struct kfd_node *node, pid_t pid,
				  uint32_t trigger)
{ … }

void kfd_smi_event_queue_restore(struct kfd_node *node, pid_t pid)
{ … }

void kfd_smi_event_queue_restore_rescheduled(struct mm_struct *mm)
{ … }

void kfd_smi_event_unmap_from_gpu(struct kfd_node *node, pid_t pid,
				  unsigned long address, unsigned long last,
				  uint32_t trigger)
{ … }

int kfd_smi_event_open(struct kfd_node *dev, uint32_t *fd)
{ … }