2 * Copyright 2014 Advanced Micro Devices, Inc.
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
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14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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25 * \file amdgpu_device.c
27 * Implementation of functions for AMD GPU device
39 #include "amdgpu_drm.h"
40 #include "amdgpu_internal.h"
41 #include "util_hash_table.h"
43 #define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
44 #define UINT_TO_PTR(x) ((void *)((intptr_t)(x)))
46 pthread_mutex_t fd_mutex = PTHREAD_MUTEX_INITIALIZER;
47 static struct util_hash_table *fd_tab;
49 static unsigned handle_hash(void *key)
51 return PTR_TO_UINT(key);
54 static int handle_compare(void *key1, void *key2)
56 return PTR_TO_UINT(key1) != PTR_TO_UINT(key2);
59 static unsigned fd_hash(void *key)
61 int fd = PTR_TO_UINT(key);
62 char *name = drmGetPrimaryDeviceNameFromFd(fd);
69 for (c = name; *c; ++c)
77 static int fd_compare(void *key1, void *key2)
79 int fd1 = PTR_TO_UINT(key1);
80 int fd2 = PTR_TO_UINT(key2);
81 char *name1 = drmGetPrimaryDeviceNameFromFd(fd1);
82 char *name2 = drmGetPrimaryDeviceNameFromFd(fd2);
85 if (name1 == NULL || name2 == NULL) {
91 result = strcmp(name1, name2);
99 * Get the authenticated form fd,
101 * \param fd - \c [in] File descriptor for AMD GPU device
102 * \param auth - \c [out] Pointer to output the fd is authenticated or not
103 * A render node fd, output auth = 0
104 * A legacy fd, get the authenticated for compatibility root
106 * \return 0 on success\n
107 * >0 - AMD specific error code\n
108 * <0 - Negative POSIX Error code
110 static int amdgpu_get_auth(int fd, int *auth)
115 if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER)
119 r = drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client);
126 int amdgpu_device_initialize(int fd,
127 uint32_t *major_version,
128 uint32_t *minor_version,
129 amdgpu_device_handle *device_handle)
131 struct amdgpu_device *dev;
132 drmVersionPtr version;
135 int flag_authexist=0;
136 uint32_t accel_working = 0;
138 *device_handle = NULL;
140 pthread_mutex_lock(&fd_mutex);
142 fd_tab = util_hash_table_create(fd_hash, fd_compare);
143 r = amdgpu_get_auth(fd, &flag_auth);
145 pthread_mutex_unlock(&fd_mutex);
148 dev = util_hash_table_get(fd_tab, UINT_TO_PTR(fd));
150 r = amdgpu_get_auth(dev->fd, &flag_authexist);
152 pthread_mutex_unlock(&fd_mutex);
155 if ((flag_auth) && (!flag_authexist)) {
158 *major_version = dev->major_version;
159 *minor_version = dev->minor_version;
160 amdgpu_device_reference(device_handle, dev);
161 pthread_mutex_unlock(&fd_mutex);
165 dev = calloc(1, sizeof(struct amdgpu_device));
167 pthread_mutex_unlock(&fd_mutex);
171 atomic_set(&dev->refcount, 1);
173 version = drmGetVersion(fd);
174 if (version->version_major != 3) {
175 fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
176 "only compatible with 3.x.x.\n",
178 version->version_major,
179 version->version_minor,
180 version->version_patchlevel);
181 drmFreeVersion(version);
188 dev->major_version = version->version_major;
189 dev->minor_version = version->version_minor;
190 drmFreeVersion(version);
192 dev->bo_flink_names = util_hash_table_create(handle_hash,
194 dev->bo_handles = util_hash_table_create(handle_hash, handle_compare);
195 pthread_mutex_init(&dev->bo_table_mutex, NULL);
197 /* Check if acceleration is working. */
198 r = amdgpu_query_info(dev, AMDGPU_INFO_ACCEL_WORKING, 4, &accel_working);
201 if (!accel_working) {
206 r = amdgpu_query_gpu_info_init(dev);
210 dev->vamgr = amdgpu_vamgr_get_global(dev);
212 *major_version = dev->major_version;
213 *minor_version = dev->minor_version;
214 *device_handle = dev;
215 util_hash_table_set(fd_tab, UINT_TO_PTR(fd), dev);
216 pthread_mutex_unlock(&fd_mutex);
222 pthread_mutex_unlock(&fd_mutex);
226 void amdgpu_device_free_internal(amdgpu_device_handle dev)
228 amdgpu_vamgr_reference(&dev->vamgr, NULL);
229 util_hash_table_destroy(dev->bo_flink_names);
230 util_hash_table_destroy(dev->bo_handles);
231 pthread_mutex_destroy(&dev->bo_table_mutex);
232 util_hash_table_remove(fd_tab, UINT_TO_PTR(dev->fd));
236 int amdgpu_device_deinitialize(amdgpu_device_handle dev)
238 amdgpu_device_reference(&dev, NULL);
242 void amdgpu_device_reference(struct amdgpu_device **dst,
243 struct amdgpu_device *src)
245 if (update_references(&(*dst)->refcount, &src->refcount))
246 amdgpu_device_free_internal(*dst);