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25 * \file amdgpu_device.c
27 * Implementation of functions for AMD GPU device
43 #include "amdgpu_drm.h"
44 #include "amdgpu_internal.h"
45 #include "util_hash_table.h"
47 #define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
48 #define UINT_TO_PTR(x) ((void *)((intptr_t)(x)))
50 static pthread_mutex_t fd_mutex = PTHREAD_MUTEX_INITIALIZER;
51 static struct util_hash_table *fd_tab;
53 static unsigned handle_hash(void *key)
55 return PTR_TO_UINT(key);
58 static int handle_compare(void *key1, void *key2)
60 return PTR_TO_UINT(key1) != PTR_TO_UINT(key2);
63 static unsigned fd_hash(void *key)
65 int fd = PTR_TO_UINT(key);
66 char *name = drmGetPrimaryDeviceNameFromFd(fd);
73 for (c = name; *c; ++c)
81 static int fd_compare(void *key1, void *key2)
83 int fd1 = PTR_TO_UINT(key1);
84 int fd2 = PTR_TO_UINT(key2);
85 char *name1 = drmGetPrimaryDeviceNameFromFd(fd1);
86 char *name2 = drmGetPrimaryDeviceNameFromFd(fd2);
89 if (name1 == NULL || name2 == NULL) {
95 result = strcmp(name1, name2);
103 * Get the authenticated form fd,
105 * \param fd - \c [in] File descriptor for AMD GPU device
106 * \param auth - \c [out] Pointer to output the fd is authenticated or not
107 * A render node fd, output auth = 0
108 * A legacy fd, get the authenticated for compatibility root
110 * \return 0 on success\n
111 * >0 - AMD specific error code\n
112 * <0 - Negative POSIX Error code
114 static int amdgpu_get_auth(int fd, int *auth)
117 drm_client_t client = {};
119 if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER)
123 r = drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client);
130 static void amdgpu_device_free_internal(amdgpu_device_handle dev)
132 amdgpu_vamgr_reference(&dev->vamgr, NULL);
133 util_hash_table_destroy(dev->bo_flink_names);
134 util_hash_table_destroy(dev->bo_handles);
135 pthread_mutex_destroy(&dev->bo_table_mutex);
136 util_hash_table_remove(fd_tab, UINT_TO_PTR(dev->fd));
138 if ((dev->flink_fd >= 0) && (dev->fd != dev->flink_fd))
139 close(dev->flink_fd);
144 * Assignment between two amdgpu_device pointers with reference counting.
147 * struct amdgpu_device *dst = ... , *src = ...;
150 * // No reference counting. Only use this when you need to move
151 * // a reference from one pointer to another.
153 * amdgpu_device_reference(&dst, src);
154 * // Reference counters are updated. dst is decremented and src is
155 * // incremented. dst is freed if its reference counter is 0.
157 static void amdgpu_device_reference(struct amdgpu_device **dst,
158 struct amdgpu_device *src)
160 if (update_references(&(*dst)->refcount, &src->refcount))
161 amdgpu_device_free_internal(*dst);
165 int amdgpu_device_initialize(int fd,
166 uint32_t *major_version,
167 uint32_t *minor_version,
168 amdgpu_device_handle *device_handle)
170 struct amdgpu_device *dev;
171 drmVersionPtr version;
174 int flag_authexist=0;
175 uint32_t accel_working = 0;
177 *device_handle = NULL;
179 pthread_mutex_lock(&fd_mutex);
181 fd_tab = util_hash_table_create(fd_hash, fd_compare);
182 r = amdgpu_get_auth(fd, &flag_auth);
184 pthread_mutex_unlock(&fd_mutex);
187 dev = util_hash_table_get(fd_tab, UINT_TO_PTR(fd));
189 r = amdgpu_get_auth(dev->fd, &flag_authexist);
191 pthread_mutex_unlock(&fd_mutex);
194 if ((flag_auth) && (!flag_authexist)) {
195 dev->flink_fd = dup(fd);
197 *major_version = dev->major_version;
198 *minor_version = dev->minor_version;
199 amdgpu_device_reference(device_handle, dev);
200 pthread_mutex_unlock(&fd_mutex);
204 dev = calloc(1, sizeof(struct amdgpu_device));
206 pthread_mutex_unlock(&fd_mutex);
213 atomic_set(&dev->refcount, 1);
215 version = drmGetVersion(fd);
216 if (version->version_major != 3) {
217 fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
218 "only compatible with 3.x.x.\n",
220 version->version_major,
221 version->version_minor,
222 version->version_patchlevel);
223 drmFreeVersion(version);
229 dev->flink_fd = dev->fd;
230 dev->major_version = version->version_major;
231 dev->minor_version = version->version_minor;
232 drmFreeVersion(version);
234 dev->bo_flink_names = util_hash_table_create(handle_hash,
236 dev->bo_handles = util_hash_table_create(handle_hash, handle_compare);
237 pthread_mutex_init(&dev->bo_table_mutex, NULL);
239 /* Check if acceleration is working. */
240 r = amdgpu_query_info(dev, AMDGPU_INFO_ACCEL_WORKING, 4, &accel_working);
243 if (!accel_working) {
248 r = amdgpu_query_gpu_info_init(dev);
252 dev->vamgr = amdgpu_vamgr_get_global(dev);
254 *major_version = dev->major_version;
255 *minor_version = dev->minor_version;
256 *device_handle = dev;
257 util_hash_table_set(fd_tab, UINT_TO_PTR(dev->fd), dev);
258 pthread_mutex_unlock(&fd_mutex);
266 pthread_mutex_unlock(&fd_mutex);
270 int amdgpu_device_deinitialize(amdgpu_device_handle dev)
272 amdgpu_device_reference(&dev, NULL);