2 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
3 * Copyright (C) 2014-2016 Emil Velikov <emil.l.velikov@gmail.com>
4 * Copyright (C) 2016 Intel Corporation
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * Rob Clark <robclark@freedesktop.org>
40 #include <sys/param.h>
42 #include <sys/mkdev.h>
44 #ifdef MAJOR_IN_SYSMACROS
45 #include <sys/sysmacros.h>
48 #include <GL/internal/dri_interface.h>
54 #include "util/xmlconfig.h"
55 #include "util/xmlpool.h"
59 #include "util/macros.h"
62 #include "pci_id_driver_map.h"
64 /* For systems like Hurd */
69 static void default_logger(int level
, const char *fmt
, ...)
71 if (level
<= _LOADER_WARNING
) {
74 vfprintf(stderr
, fmt
, args
);
79 static loader_logger
*log_
= default_logger
;
82 loader_open_device(const char *device_name
)
86 fd
= open(device_name
, O_RDWR
| O_CLOEXEC
);
87 if (fd
== -1 && errno
== EINVAL
)
90 fd
= open(device_name
, O_RDWR
);
92 fcntl(fd
, F_SETFD
, fcntl(fd
, F_GETFD
) | FD_CLOEXEC
);
94 if (fd
== -1 && errno
== EACCES
) {
95 log_(_LOADER_WARNING
, "failed to open %s: %s\n",
96 device_name
, strerror(errno
));
101 static char *loader_get_kernel_driver_name(int fd
)
105 drmVersionPtr version
= drmGetVersion(fd
);
108 log_(_LOADER_WARNING
, "failed to get driver name for fd %d\n", fd
);
112 driver
= strndup(version
->name
, version
->name_len
);
114 drmFreeVersion(version
);
122 is_kernel_i915(int fd
)
124 char *kernel_driver
= loader_get_kernel_driver_name(fd
);
125 bool is_i915
= kernel_driver
&& strcmp(kernel_driver
, "i915") == 0;
131 #if defined(HAVE_LIBDRM)
133 loader_open_render_node(const char *name
)
135 drmDevicePtr
*devices
, device
;
136 int err
, render
= -ENOENT
, fd
;
139 err
= drmGetDevices2(0, NULL
, 0);
145 devices
= calloc(num
, sizeof(*devices
));
149 err
= drmGetDevices2(0, devices
, num
);
155 for (i
= 0; i
< num
; i
++) {
158 if ((device
->available_nodes
& (1 << DRM_NODE_RENDER
)) &&
159 (device
->bustype
== DRM_BUS_PLATFORM
)) {
160 drmVersionPtr version
;
162 fd
= loader_open_device(device
->nodes
[DRM_NODE_RENDER
]);
166 version
= drmGetVersion(fd
);
172 if (strcmp(version
->name
, name
) != 0) {
173 drmFreeVersion(version
);
178 drmFreeVersion(version
);
184 drmFreeDevices(devices
, num
);
192 static const char __driConfigOptionsLoader
[] =
194 DRI_CONF_SECTION_INITIALIZATION
195 DRI_CONF_DEVICE_ID_PATH_TAG()
196 DRI_CONF_DRI_DRIVER()
200 static char *loader_get_dri_config_driver(int fd
)
202 driOptionCache defaultInitOptions
;
203 driOptionCache userInitOptions
;
204 char *dri_driver
= NULL
;
205 char *kernel_driver
= loader_get_kernel_driver_name(fd
);
207 driParseOptionInfo(&defaultInitOptions
, __driConfigOptionsLoader
);
208 driParseConfigFiles(&userInitOptions
, &defaultInitOptions
, 0,
209 "loader", kernel_driver
, NULL
, 0);
210 if (driCheckOption(&userInitOptions
, "dri_driver", DRI_STRING
)) {
211 char *opt
= driQueryOptionstr(&userInitOptions
, "dri_driver");
212 /* not an empty string */
214 dri_driver
= strdup(opt
);
216 driDestroyOptionCache(&userInitOptions
);
217 driDestroyOptionInfo(&defaultInitOptions
);
223 static char *loader_get_dri_config_device_id(void)
225 driOptionCache defaultInitOptions
;
226 driOptionCache userInitOptions
;
229 driParseOptionInfo(&defaultInitOptions
, __driConfigOptionsLoader
);
230 driParseConfigFiles(&userInitOptions
, &defaultInitOptions
, 0,
231 "loader", NULL
, NULL
, 0);
232 if (driCheckOption(&userInitOptions
, "device_id", DRI_STRING
))
233 prime
= strdup(driQueryOptionstr(&userInitOptions
, "device_id"));
234 driDestroyOptionCache(&userInitOptions
);
235 driDestroyOptionInfo(&defaultInitOptions
);
241 static char *drm_construct_id_path_tag(drmDevicePtr device
)
245 if (device
->bustype
== DRM_BUS_PCI
) {
246 if (asprintf(&tag
, "pci-%04x_%02x_%02x_%1u",
247 device
->businfo
.pci
->domain
,
248 device
->businfo
.pci
->bus
,
249 device
->businfo
.pci
->dev
,
250 device
->businfo
.pci
->func
) < 0) {
253 } else if (device
->bustype
== DRM_BUS_PLATFORM
||
254 device
->bustype
== DRM_BUS_HOST1X
) {
255 char *fullname
, *name
, *address
;
257 if (device
->bustype
== DRM_BUS_PLATFORM
)
258 fullname
= device
->businfo
.platform
->fullname
;
260 fullname
= device
->businfo
.host1x
->fullname
;
262 name
= strrchr(fullname
, '/');
264 name
= strdup(fullname
);
266 name
= strdup(name
+ 1);
268 address
= strchr(name
, '@');
272 if (asprintf(&tag
, "platform-%s_%s", address
, name
) < 0)
275 if (asprintf(&tag
, "platform-%s", name
) < 0)
284 static bool drm_device_matches_tag(drmDevicePtr device
, const char *prime_tag
)
286 char *tag
= drm_construct_id_path_tag(device
);
292 ret
= strcmp(tag
, prime_tag
);
298 static char *drm_get_id_path_tag_for_fd(int fd
)
303 if (drmGetDevice2(fd
, 0, &device
) != 0)
306 tag
= drm_construct_id_path_tag(device
);
307 drmFreeDevice(&device
);
311 int loader_get_user_preferred_fd(int default_fd
, bool *different_device
)
313 /* Arbitrary "maximum" value of drm devices. */
314 #define MAX_DRM_DEVICES 32
315 const char *dri_prime
= getenv("DRI_PRIME");
316 char *default_tag
, *prime
= NULL
;
317 drmDevicePtr devices
[MAX_DRM_DEVICES
];
318 int i
, num_devices
, fd
;
322 prime
= strdup(dri_prime
);
325 prime
= loader_get_dri_config_device_id();
329 *different_device
= false;
333 default_tag
= drm_get_id_path_tag_for_fd(default_fd
);
334 if (default_tag
== NULL
)
337 num_devices
= drmGetDevices2(0, devices
, MAX_DRM_DEVICES
);
341 /* two format are supported:
342 * "1": choose any other card than the card used by default.
343 * id_path_tag: (for example "pci-0000_02_00_0") choose the card
344 * with this id_path_tag.
346 if (!strcmp(prime
,"1")) {
347 /* Hmm... detection for 2-7 seems to be broken. Oh well ...
348 * Pick the first render device that is not our own.
350 for (i
= 0; i
< num_devices
; i
++) {
351 if (devices
[i
]->available_nodes
& 1 << DRM_NODE_RENDER
&&
352 !drm_device_matches_tag(devices
[i
], default_tag
)) {
359 for (i
= 0; i
< num_devices
; i
++) {
360 if (devices
[i
]->available_nodes
& 1 << DRM_NODE_RENDER
&&
361 drm_device_matches_tag(devices
[i
], prime
)) {
370 drmFreeDevices(devices
, num_devices
);
374 fd
= loader_open_device(devices
[i
]->nodes
[DRM_NODE_RENDER
]);
375 drmFreeDevices(devices
, num_devices
);
381 *different_device
= !!strcmp(default_tag
, prime
);
388 *different_device
= false;
396 loader_open_render_node(const char *name
)
401 int loader_get_user_preferred_fd(int default_fd
, bool *different_device
)
403 *different_device
= false;
408 #if defined(HAVE_LIBDRM)
411 drm_get_pci_id_for_fd(int fd
, int *vendor_id
, int *chip_id
)
416 if (drmGetDevice2(fd
, 0, &device
) == 0) {
417 if (device
->bustype
== DRM_BUS_PCI
) {
418 *vendor_id
= device
->deviceinfo
.pci
->vendor_id
;
419 *chip_id
= device
->deviceinfo
.pci
->device_id
;
423 log_(_LOADER_DEBUG
, "MESA-LOADER: device is not located on the PCI bus\n");
426 drmFreeDevice(&device
);
429 log_(_LOADER_WARNING
, "MESA-LOADER: failed to retrieve device information\n");
439 loader_get_pci_id_for_fd(int fd
, int *vendor_id
, int *chip_id
)
442 return drm_get_pci_id_for_fd(fd
, vendor_id
, chip_id
);
448 loader_get_device_name_for_fd(int fd
)
453 result
= drmGetDeviceNameFromFd2(fd
);
460 loader_get_driver_for_fd(int fd
)
462 int vendor_id
, chip_id
, i
, j
;
465 /* Allow an environment variable to force choosing a different driver
466 * binary. If that driver binary can't survive on this FD, that's the
467 * user's problem, but this allows vc4 simulator to run on an i965 host,
468 * and may be useful for some touch testing of i915 on an i965 host.
470 if (geteuid() == getuid()) {
471 driver
= getenv("MESA_LOADER_DRIVER_OVERRIDE");
473 return strdup(driver
);
476 #if defined(HAVE_LIBDRM) && defined(USE_DRICONF)
477 driver
= loader_get_dri_config_driver(fd
);
482 if (!loader_get_pci_id_for_fd(fd
, &vendor_id
, &chip_id
)) {
483 driver
= loader_get_kernel_driver_name(fd
);
485 log_(_LOADER_INFO
, "using driver %s for %d\n", driver
, fd
);
489 for (i
= 0; i
< ARRAY_SIZE(driver_map
); i
++) {
490 if (vendor_id
!= driver_map
[i
].vendor_id
)
493 if (driver_map
[i
].predicate
&& !driver_map
[i
].predicate(fd
))
496 if (driver_map
[i
].num_chips_ids
== -1) {
497 driver
= strdup(driver_map
[i
].driver
);
501 for (j
= 0; j
< driver_map
[i
].num_chips_ids
; j
++)
502 if (driver_map
[i
].chip_ids
[j
] == chip_id
) {
503 driver
= strdup(driver_map
[i
].driver
);
509 log_(driver
? _LOADER_DEBUG
: _LOADER_WARNING
,
510 "pci id for fd %d: %04x:%04x, driver %s\n",
511 fd
, vendor_id
, chip_id
, driver
);
516 loader_set_logger(loader_logger
*logger
)
522 loader_get_extensions_name(const char *driver_name
)
526 if (asprintf(&name
, "%s_%s", __DRI_DRIVER_GET_EXTENSIONS
, driver_name
) < 0)
529 const size_t len
= strlen(name
);
530 for (size_t i
= 0; i
< len
; i
++) {
539 * Opens a DRI driver using its driver name, returning the __DRIextension
542 * \param driverName - a name like "i965", "radeon", "nouveau", etc.
543 * \param out_driver - Address where the dlopen() return value will be stored.
544 * \param search_path_vars - NULL-terminated list of env vars that can be used
545 * to override the DEFAULT_DRIVER_DIR search path.
547 const struct __DRIextensionRec
**
548 loader_open_driver(const char *driver_name
,
549 void **out_driver_handle
,
550 const char **search_path_vars
)
552 char path
[PATH_MAX
], *search_paths
, *next
, *end
;
553 char *get_extensions_name
;
554 const struct __DRIextensionRec
**extensions
= NULL
;
555 const struct __DRIextensionRec
**(*get_extensions
)(void);
558 if (geteuid() == getuid() && search_path_vars
) {
559 for (int i
= 0; search_path_vars
[i
] != NULL
; i
++) {
560 search_paths
= getenv(search_path_vars
[i
]);
565 if (search_paths
== NULL
)
566 search_paths
= DEFAULT_DRIVER_DIR
;
569 end
= search_paths
+ strlen(search_paths
);
570 for (char *p
= search_paths
; p
< end
; p
= next
+ 1) {
572 next
= strchr(p
, ':');
578 snprintf(path
, sizeof(path
), "%.*s/tls/%s_dri.so", len
, p
, driver_name
);
579 driver
= dlopen(path
, RTLD_NOW
| RTLD_GLOBAL
);
581 if (driver
== NULL
) {
582 snprintf(path
, sizeof(path
), "%.*s/%s_dri.so", len
, p
, driver_name
);
583 driver
= dlopen(path
, RTLD_NOW
| RTLD_GLOBAL
);
585 log_(_LOADER_DEBUG
, "MESA-LOADER: failed to open %s: %s\n",
588 /* not need continue to loop all paths once the driver is found */
593 if (driver
== NULL
) {
594 log_(_LOADER_WARNING
, "MESA-LOADER: failed to open %s (search paths %s)\n",
595 driver_name
, search_paths
);
596 *out_driver_handle
= NULL
;
600 log_(_LOADER_DEBUG
, "MESA-LOADER: dlopen(%s)\n", path
);
602 get_extensions_name
= loader_get_extensions_name(driver_name
);
603 if (get_extensions_name
) {
604 get_extensions
= dlsym(driver
, get_extensions_name
);
605 if (get_extensions
) {
606 extensions
= get_extensions();
608 log_(_LOADER_DEBUG
, "MESA-LOADER: driver does not expose %s(): %s\n",
609 get_extensions_name
, dlerror());
611 free(get_extensions_name
);
615 extensions
= dlsym(driver
, __DRI_DRIVER_EXTENSIONS
);
616 if (extensions
== NULL
) {
617 log_(_LOADER_WARNING
,
618 "MESA-LOADER: driver exports no extensions (%s)\n", dlerror());
622 *out_driver_handle
= driver
;