242 lines
6.2 KiB
C
242 lines
6.2 KiB
C
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/*
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* Copyright 2014 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/**
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* \file amdgpu_device.c
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*
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* Implementation of functions for AMD GPU device
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*
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*
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*/
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#include <sys/stat.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "xf86drm.h"
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#include "amdgpu_drm.h"
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#include "amdgpu_internal.h"
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#include "util_hash_table.h"
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#define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
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#define UINT_TO_PTR(x) ((void *)((intptr_t)(x)))
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#define RENDERNODE_MINOR_MASK 0xff7f
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pthread_mutex_t fd_mutex = PTHREAD_MUTEX_INITIALIZER;
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static struct util_hash_table *fd_tab;
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static unsigned handle_hash(void *key)
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{
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return PTR_TO_UINT(key);
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}
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static int handle_compare(void *key1, void *key2)
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{
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return PTR_TO_UINT(key1) != PTR_TO_UINT(key2);
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}
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static unsigned fd_hash(void *key)
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{
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int fd = PTR_TO_UINT(key);
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struct stat stat;
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fstat(fd, &stat);
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if (!S_ISCHR(stat.st_mode))
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return stat.st_dev ^ stat.st_ino;
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else
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return stat.st_dev ^ (stat.st_rdev & RENDERNODE_MINOR_MASK);
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}
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static int fd_compare(void *key1, void *key2)
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{
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int fd1 = PTR_TO_UINT(key1);
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int fd2 = PTR_TO_UINT(key2);
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struct stat stat1, stat2;
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fstat(fd1, &stat1);
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fstat(fd2, &stat2);
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if (!S_ISCHR(stat1.st_mode) || !S_ISCHR(stat2.st_mode))
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return stat1.st_dev != stat2.st_dev ||
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stat1.st_ino != stat2.st_ino;
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else
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return major(stat1.st_rdev) != major(stat2.st_rdev) ||
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(minor(stat1.st_rdev) & RENDERNODE_MINOR_MASK) !=
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(minor(stat2.st_rdev) & RENDERNODE_MINOR_MASK);
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}
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/**
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* Get the authenticated form fd,
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*
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* \param fd - \c [in] File descriptor for AMD GPU device
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* \param auth - \c [out] Pointer to output the fd is authenticated or not
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* A render node fd, output auth = 0
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* A legacy fd, get the authenticated for compatibility root
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*
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* \return 0 on success\n
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* >0 - AMD specific error code\n
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* <0 - Negative POSIX Error code
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*/
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static int amdgpu_get_auth(int fd, int *auth)
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{
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int r = 0;
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drm_client_t client;
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if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER)
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*auth = 0;
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else {
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client.idx = 0;
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r = drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client);
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if (!r)
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*auth = client.auth;
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}
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return r;
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}
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int amdgpu_device_initialize(int fd,
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uint32_t *major_version,
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uint32_t *minor_version,
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amdgpu_device_handle *device_handle)
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{
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struct amdgpu_device *dev;
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drmVersionPtr version;
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int r;
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int flag_auth = 0;
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int flag_authexist=0;
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uint32_t accel_working;
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*device_handle = NULL;
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pthread_mutex_lock(&fd_mutex);
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if (!fd_tab)
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fd_tab = util_hash_table_create(fd_hash, fd_compare);
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r = amdgpu_get_auth(fd, &flag_auth);
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if (r) {
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pthread_mutex_unlock(&fd_mutex);
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return r;
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}
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dev = util_hash_table_get(fd_tab, UINT_TO_PTR(fd));
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if (dev) {
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r = amdgpu_get_auth(dev->fd, &flag_authexist);
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if (r) {
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pthread_mutex_unlock(&fd_mutex);
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return r;
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}
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if ((flag_auth) && (!flag_authexist)) {
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dev->flink_fd = fd;
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}
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*major_version = dev->major_version;
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*minor_version = dev->minor_version;
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amdgpu_device_reference(device_handle, dev);
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pthread_mutex_unlock(&fd_mutex);
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return 0;
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}
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dev = calloc(1, sizeof(struct amdgpu_device));
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if (!dev) {
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pthread_mutex_unlock(&fd_mutex);
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return -ENOMEM;
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}
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atomic_set(&dev->refcount, 1);
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version = drmGetVersion(fd);
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if (version->version_major != 3) {
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fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
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"only compatible with 3.x.x.\n",
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__func__,
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version->version_major,
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version->version_minor,
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version->version_patchlevel);
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drmFreeVersion(version);
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r = -EBADF;
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goto cleanup;
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}
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dev->fd = fd;
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dev->flink_fd = fd;
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dev->major_version = version->version_major;
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dev->minor_version = version->version_minor;
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drmFreeVersion(version);
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dev->bo_flink_names = util_hash_table_create(handle_hash,
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handle_compare);
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dev->bo_handles = util_hash_table_create(handle_hash, handle_compare);
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dev->bo_vas = util_hash_table_create(handle_hash, handle_compare);
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pthread_mutex_init(&dev->bo_table_mutex, NULL);
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/* Check if acceleration is working. */
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r = amdgpu_query_info(dev, AMDGPU_INFO_ACCEL_WORKING, 4, &accel_working);
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if (r)
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goto cleanup;
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if (!accel_working) {
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r = -EBADF;
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goto cleanup;
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}
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r = amdgpu_query_gpu_info_init(dev);
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if (r)
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goto cleanup;
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amdgpu_vamgr_init(dev);
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*major_version = dev->major_version;
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*minor_version = dev->minor_version;
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*device_handle = dev;
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util_hash_table_set(fd_tab, UINT_TO_PTR(fd), dev);
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pthread_mutex_unlock(&fd_mutex);
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return 0;
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cleanup:
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free(dev);
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pthread_mutex_unlock(&fd_mutex);
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return r;
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}
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void amdgpu_device_free_internal(amdgpu_device_handle dev)
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{
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util_hash_table_destroy(dev->bo_flink_names);
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util_hash_table_destroy(dev->bo_handles);
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util_hash_table_destroy(dev->bo_vas);
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pthread_mutex_destroy(&dev->bo_table_mutex);
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pthread_mutex_destroy(&(dev->vamgr.bo_va_mutex));
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util_hash_table_remove(fd_tab, UINT_TO_PTR(dev->fd));
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free(dev);
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}
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int amdgpu_device_deinitialize(amdgpu_device_handle dev)
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{
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amdgpu_device_reference(&dev, NULL);
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return 0;
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}
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void amdgpu_device_reference(struct amdgpu_device **dst,
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struct amdgpu_device *src)
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{
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if (update_references(&(*dst)->refcount, &src->refcount))
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amdgpu_device_free_internal(*dst);
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*dst = src;
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}
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