1 /*
2 * Copyright 2014 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23
24 /**
25 * \file amdgpu_device.c
26 *
27 * Implementation of functions for AMD GPU device
28 *
29 */
30
31 #include <sys/stat.h>
32 #include <errno.h>
33 #include <string.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <unistd.h>
37 #include <fcntl.h>
38
39 #include "xf86drm.h"
40 #include "amdgpu_drm.h"
41 #include "amdgpu_internal.h"
42 #include "util_math.h"
43
44 #define PTR_TO_UINT(x) ((unsigned)((intptr_t)(x)))
45
46 static pthread_mutex_t dev_mutex = PTHREAD_MUTEX_INITIALIZER;
47 static amdgpu_device_handle dev_list;
48
fd_compare(int fd1,int fd2)49 static int fd_compare(int fd1, int fd2)
50 {
51 char *name1 = drmGetPrimaryDeviceNameFromFd(fd1);
52 char *name2 = drmGetPrimaryDeviceNameFromFd(fd2);
53 int result;
54
55 if (name1 == NULL || name2 == NULL) {
56 free(name1);
57 free(name2);
58 return 0;
59 }
60
61 result = strcmp(name1, name2);
62 free(name1);
63 free(name2);
64
65 return result;
66 }
67
68 /**
69 * Get the authenticated form fd,
70 *
71 * \param fd - \c [in] File descriptor for AMD GPU device
72 * \param auth - \c [out] Pointer to output the fd is authenticated or not
73 * A render node fd, output auth = 0
74 * A legacy fd, get the authenticated for compatibility root
75 *
76 * \return 0 on success\n
77 * >0 - AMD specific error code\n
78 * <0 - Negative POSIX Error code
79 */
amdgpu_get_auth(int fd,int * auth)80 static int amdgpu_get_auth(int fd, int *auth)
81 {
82 int r = 0;
83 drm_client_t client = {};
84
85 if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER)
86 *auth = 0;
87 else {
88 client.idx = 0;
89 r = drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client);
90 if (!r)
91 *auth = client.auth;
92 }
93 return r;
94 }
95
amdgpu_device_free_internal(amdgpu_device_handle dev)96 static void amdgpu_device_free_internal(amdgpu_device_handle dev)
97 {
98 amdgpu_device_handle *node = &dev_list;
99
100 pthread_mutex_lock(&dev_mutex);
101 while (*node != dev && (*node)->next)
102 node = &(*node)->next;
103 *node = (*node)->next;
104 pthread_mutex_unlock(&dev_mutex);
105
106 close(dev->fd);
107 if ((dev->flink_fd >= 0) && (dev->fd != dev->flink_fd))
108 close(dev->flink_fd);
109
110 amdgpu_vamgr_deinit(&dev->vamgr_32);
111 amdgpu_vamgr_deinit(&dev->vamgr);
112 amdgpu_vamgr_deinit(&dev->vamgr_high_32);
113 amdgpu_vamgr_deinit(&dev->vamgr_high);
114 handle_table_fini(&dev->bo_handles);
115 handle_table_fini(&dev->bo_flink_names);
116 pthread_mutex_destroy(&dev->bo_table_mutex);
117 free(dev->marketing_name);
118 free(dev);
119 }
120
121 /**
122 * Assignment between two amdgpu_device pointers with reference counting.
123 *
124 * Usage:
125 * struct amdgpu_device *dst = ... , *src = ...;
126 *
127 * dst = src;
128 * // No reference counting. Only use this when you need to move
129 * // a reference from one pointer to another.
130 *
131 * amdgpu_device_reference(&dst, src);
132 * // Reference counters are updated. dst is decremented and src is
133 * // incremented. dst is freed if its reference counter is 0.
134 */
amdgpu_device_reference(struct amdgpu_device ** dst,struct amdgpu_device * src)135 static void amdgpu_device_reference(struct amdgpu_device **dst,
136 struct amdgpu_device *src)
137 {
138 if (update_references(&(*dst)->refcount, &src->refcount))
139 amdgpu_device_free_internal(*dst);
140 *dst = src;
141 }
142
amdgpu_device_initialize(int fd,uint32_t * major_version,uint32_t * minor_version,amdgpu_device_handle * device_handle)143 drm_public int amdgpu_device_initialize(int fd,
144 uint32_t *major_version,
145 uint32_t *minor_version,
146 amdgpu_device_handle *device_handle)
147 {
148 struct amdgpu_device *dev;
149 drmVersionPtr version;
150 int r;
151 int flag_auth = 0;
152 int flag_authexist=0;
153 uint32_t accel_working = 0;
154 uint64_t start, max;
155
156 *device_handle = NULL;
157
158 pthread_mutex_lock(&dev_mutex);
159 r = amdgpu_get_auth(fd, &flag_auth);
160 if (r) {
161 fprintf(stderr, "%s: amdgpu_get_auth (1) failed (%i)\n",
162 __func__, r);
163 pthread_mutex_unlock(&dev_mutex);
164 return r;
165 }
166
167 for (dev = dev_list; dev; dev = dev->next)
168 if (fd_compare(dev->fd, fd) == 0)
169 break;
170
171 if (dev) {
172 r = amdgpu_get_auth(dev->fd, &flag_authexist);
173 if (r) {
174 fprintf(stderr, "%s: amdgpu_get_auth (2) failed (%i)\n",
175 __func__, r);
176 pthread_mutex_unlock(&dev_mutex);
177 return r;
178 }
179 if ((flag_auth) && (!flag_authexist)) {
180 dev->flink_fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
181 }
182 *major_version = dev->major_version;
183 *minor_version = dev->minor_version;
184 amdgpu_device_reference(device_handle, dev);
185 pthread_mutex_unlock(&dev_mutex);
186 return 0;
187 }
188
189 dev = calloc(1, sizeof(struct amdgpu_device));
190 if (!dev) {
191 fprintf(stderr, "%s: calloc failed\n", __func__);
192 pthread_mutex_unlock(&dev_mutex);
193 return -ENOMEM;
194 }
195
196 dev->fd = -1;
197 dev->flink_fd = -1;
198
199 atomic_set(&dev->refcount, 1);
200
201 version = drmGetVersion(fd);
202 if (version->version_major != 3) {
203 fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
204 "only compatible with 3.x.x.\n",
205 __func__,
206 version->version_major,
207 version->version_minor,
208 version->version_patchlevel);
209 drmFreeVersion(version);
210 r = -EBADF;
211 goto cleanup;
212 }
213
214 dev->fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
215 dev->flink_fd = dev->fd;
216 dev->major_version = version->version_major;
217 dev->minor_version = version->version_minor;
218 drmFreeVersion(version);
219
220 pthread_mutex_init(&dev->bo_table_mutex, NULL);
221
222 /* Check if acceleration is working. */
223 r = amdgpu_query_info(dev, AMDGPU_INFO_ACCEL_WORKING, 4, &accel_working);
224 if (r) {
225 fprintf(stderr, "%s: amdgpu_query_info(ACCEL_WORKING) failed (%i)\n",
226 __func__, r);
227 goto cleanup;
228 }
229 if (!accel_working) {
230 fprintf(stderr, "%s: AMDGPU_INFO_ACCEL_WORKING = 0\n", __func__);
231 r = -EBADF;
232 goto cleanup;
233 }
234
235 r = amdgpu_query_gpu_info_init(dev);
236 if (r) {
237 fprintf(stderr, "%s: amdgpu_query_gpu_info_init failed\n", __func__);
238 goto cleanup;
239 }
240
241 start = dev->dev_info.virtual_address_offset;
242 max = MIN2(dev->dev_info.virtual_address_max, 0x100000000ULL);
243 amdgpu_vamgr_init(&dev->vamgr_32, start, max,
244 dev->dev_info.virtual_address_alignment);
245
246 start = max;
247 max = MAX2(dev->dev_info.virtual_address_max, 0x100000000ULL);
248 amdgpu_vamgr_init(&dev->vamgr, start, max,
249 dev->dev_info.virtual_address_alignment);
250
251 start = dev->dev_info.high_va_offset;
252 max = MIN2(dev->dev_info.high_va_max, (start & ~0xffffffffULL) +
253 0x100000000ULL);
254 amdgpu_vamgr_init(&dev->vamgr_high_32, start, max,
255 dev->dev_info.virtual_address_alignment);
256
257 start = max;
258 max = MAX2(dev->dev_info.high_va_max, (start & ~0xffffffffULL) +
259 0x100000000ULL);
260 amdgpu_vamgr_init(&dev->vamgr_high, start, max,
261 dev->dev_info.virtual_address_alignment);
262
263 amdgpu_parse_asic_ids(dev);
264
265 *major_version = dev->major_version;
266 *minor_version = dev->minor_version;
267 *device_handle = dev;
268 dev->next = dev_list;
269 dev_list = dev;
270 pthread_mutex_unlock(&dev_mutex);
271
272 return 0;
273
274 cleanup:
275 if (dev->fd >= 0)
276 close(dev->fd);
277 free(dev);
278 pthread_mutex_unlock(&dev_mutex);
279 return r;
280 }
281
amdgpu_device_deinitialize(amdgpu_device_handle dev)282 drm_public int amdgpu_device_deinitialize(amdgpu_device_handle dev)
283 {
284 amdgpu_device_reference(&dev, NULL);
285 return 0;
286 }
287
amdgpu_get_marketing_name(amdgpu_device_handle dev)288 drm_public const char *amdgpu_get_marketing_name(amdgpu_device_handle dev)
289 {
290 return dev->marketing_name;
291 }
292
amdgpu_query_sw_info(amdgpu_device_handle dev,enum amdgpu_sw_info info,void * value)293 drm_public int amdgpu_query_sw_info(amdgpu_device_handle dev,
294 enum amdgpu_sw_info info,
295 void *value)
296 {
297 uint32_t *val32 = (uint32_t*)value;
298
299 switch (info) {
300 case amdgpu_sw_info_address32_hi:
301 if (dev->vamgr_high_32.va_max)
302 *val32 = (dev->vamgr_high_32.va_max - 1) >> 32;
303 else
304 *val32 = (dev->vamgr_32.va_max - 1) >> 32;
305 return 0;
306 }
307 return -EINVAL;
308 }
309