* Rob Clark <robclark@freedesktop.org>
*/
+#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
+#include <limits.h>
+#include <sys/param.h>
#ifdef MAJOR_IN_MKDEV
#include <sys/mkdev.h>
#endif
#ifdef MAJOR_IN_SYSMACROS
#include <sys/sysmacros.h>
#endif
+#include <GL/gl.h>
+#include <GL/internal/dri_interface.h>
#include "loader.h"
#ifdef HAVE_LIBDRM
#include <xf86drm.h>
+#define MAX_DRM_DEVICES 64
#ifdef USE_DRICONF
#include "util/xmlconfig.h"
#include "util/xmlpool.h"
#endif
#endif
+#include "util/macros.h"
+
#define __IS_LOADER
#include "pci_id_driver_map.h"
+/* For systems like Hurd */
+#ifndef PATH_MAX
+#define PATH_MAX 4096
+#endif
+
static void default_logger(int level, const char *fmt, ...)
{
if (level <= _LOADER_WARNING) {
}
}
-static void (*log_)(int level, const char *fmt, ...) = default_logger;
+static loader_logger *log_ = default_logger;
int
loader_open_device(const char *device_name)
if (fd != -1)
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
}
+ if (fd == -1 && errno == EACCES) {
+ log_(_LOADER_WARNING, "failed to open %s: %s\n",
+ device_name, strerror(errno));
+ }
return fd;
}
#endif
}
+bool
+is_kernel_i915(int fd)
+{
+ char *kernel_driver = loader_get_kernel_driver_name(fd);
+ bool is_i915 = kernel_driver && strcmp(kernel_driver, "i915") == 0;
+
+ free(kernel_driver);
+ return is_i915;
+}
+
#if defined(HAVE_LIBDRM)
+int
+loader_open_render_node(const char *name)
+{
+ drmDevicePtr devices[MAX_DRM_DEVICES], device;
+ int i, num_devices, fd = -1;
+
+ num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES);
+ if (num_devices <= 0)
+ return -ENOENT;
+
+ for (i = 0; i < num_devices; i++) {
+ device = devices[i];
+
+ if ((device->available_nodes & (1 << DRM_NODE_RENDER)) &&
+ (device->bustype == DRM_BUS_PLATFORM)) {
+ drmVersionPtr version;
+
+ fd = loader_open_device(device->nodes[DRM_NODE_RENDER]);
+ if (fd < 0)
+ continue;
+
+ version = drmGetVersion(fd);
+ if (!version) {
+ close(fd);
+ continue;
+ }
+
+ if (strcmp(version->name, name) != 0) {
+ drmFreeVersion(version);
+ close(fd);
+ continue;
+ }
+
+ drmFreeVersion(version);
+ break;
+ }
+ }
+ drmFreeDevices(devices, num_devices);
+
+ if (i == num_devices)
+ return -ENOENT;
+
+ return fd;
+}
+
#ifdef USE_DRICONF
static const char __driConfigOptionsLoader[] =
DRI_CONF_BEGIN
DRI_CONF_SECTION_INITIALIZATION
DRI_CONF_DEVICE_ID_PATH_TAG()
+ DRI_CONF_DRI_DRIVER()
DRI_CONF_SECTION_END
DRI_CONF_END;
+static char *loader_get_dri_config_driver(int fd)
+{
+ driOptionCache defaultInitOptions;
+ driOptionCache userInitOptions;
+ char *dri_driver = NULL;
+ char *kernel_driver = loader_get_kernel_driver_name(fd);
+
+ driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader);
+ driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0,
+ "loader", kernel_driver, NULL, 0);
+ if (driCheckOption(&userInitOptions, "dri_driver", DRI_STRING)) {
+ char *opt = driQueryOptionstr(&userInitOptions, "dri_driver");
+ /* not an empty string */
+ if (*opt)
+ dri_driver = strdup(opt);
+ }
+ driDestroyOptionCache(&userInitOptions);
+ driDestroyOptionInfo(&defaultInitOptions);
+
+ free(kernel_driver);
+ return dri_driver;
+}
+
static char *loader_get_dri_config_device_id(void)
{
driOptionCache defaultInitOptions;
char *prime = NULL;
driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader);
- driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0, "loader", NULL);
+ driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0,
+ "loader", NULL, NULL, 0);
if (driCheckOption(&userInitOptions, "device_id", DRI_STRING))
prime = strdup(driQueryOptionstr(&userInitOptions, "device_id"));
driDestroyOptionCache(&userInitOptions);
int loader_get_user_preferred_fd(int default_fd, bool *different_device)
{
-/* Arbitrary "maximum" value of drm devices. */
-#define MAX_DRM_DEVICES 32
const char *dri_prime = getenv("DRI_PRIME");
char *default_tag, *prime = NULL;
drmDevicePtr devices[MAX_DRM_DEVICES];
- int i, num_devices, fd;
- bool found = false;
+ int i, num_devices, fd = -1;
if (dri_prime)
prime = strdup(dri_prime);
goto err;
num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES);
- if (num_devices < 0)
+ if (num_devices <= 0)
goto err;
- /* two format are supported:
- * "1": choose any other card than the card used by default.
- * id_path_tag: (for example "pci-0000_02_00_0") choose the card
- * with this id_path_tag.
- */
- if (!strcmp(prime,"1")) {
- /* Hmm... detection for 2-7 seems to be broken. Oh well ...
- * Pick the first render device that is not our own.
- */
- for (i = 0; i < num_devices; i++) {
- if (devices[i]->available_nodes & 1 << DRM_NODE_RENDER &&
- !drm_device_matches_tag(devices[i], default_tag)) {
+ for (i = 0; i < num_devices; i++) {
+ if (!(devices[i]->available_nodes & 1 << DRM_NODE_RENDER))
+ continue;
- found = true;
- break;
- }
+ /* two formats of DRI_PRIME are supported:
+ * "1": choose any other card than the card used by default.
+ * id_path_tag: (for example "pci-0000_02_00_0") choose the card
+ * with this id_path_tag.
+ */
+ if (!strcmp(prime,"1")) {
+ if (drm_device_matches_tag(devices[i], default_tag))
+ continue;
+ } else {
+ if (!drm_device_matches_tag(devices[i], prime))
+ continue;
}
- } else {
- for (i = 0; i < num_devices; i++) {
- if (devices[i]->available_nodes & 1 << DRM_NODE_RENDER &&
- drm_device_matches_tag(devices[i], prime)) {
- found = true;
- break;
- }
- }
+ fd = loader_open_device(devices[i]->nodes[DRM_NODE_RENDER]);
+ break;
}
+ drmFreeDevices(devices, num_devices);
- if (!found) {
- drmFreeDevices(devices, num_devices);
+ if (i == num_devices)
goto err;
- }
- fd = loader_open_device(devices[i]->nodes[DRM_NODE_RENDER]);
- drmFreeDevices(devices, num_devices);
if (fd < 0)
goto err;
return default_fd;
}
#else
+int
+loader_open_render_node(const char *name)
+{
+ return -1;
+}
+
int loader_get_user_preferred_fd(int default_fd, bool *different_device)
{
*different_device = false;
#if defined(HAVE_LIBDRM)
-static int
+static bool
drm_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
{
drmDevicePtr device;
- int ret;
+ bool ret;
if (drmGetDevice2(fd, 0, &device) == 0) {
if (device->bustype == DRM_BUS_PCI) {
*vendor_id = device->deviceinfo.pci->vendor_id;
*chip_id = device->deviceinfo.pci->device_id;
- ret = 1;
+ ret = true;
}
else {
log_(_LOADER_DEBUG, "MESA-LOADER: device is not located on the PCI bus\n");
- ret = 0;
+ ret = false;
}
drmFreeDevice(&device);
}
else {
log_(_LOADER_WARNING, "MESA-LOADER: failed to retrieve device information\n");
- ret = 0;
+ ret = false;
}
return ret;
#endif
-int
+bool
loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
{
#if HAVE_LIBDRM
- if (drm_get_pci_id_for_fd(fd, vendor_id, chip_id))
- return 1;
+ return drm_get_pci_id_for_fd(fd, vendor_id, chip_id);
#endif
- return 0;
+ return false;
}
char *
return strdup(driver);
}
+#if defined(HAVE_LIBDRM) && defined(USE_DRICONF)
+ driver = loader_get_dri_config_driver(fd);
+ if (driver)
+ return driver;
+#endif
+
if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) {
driver = loader_get_kernel_driver_name(fd);
if (driver)
return driver;
}
- for (i = 0; driver_map[i].driver; i++) {
+ for (i = 0; i < ARRAY_SIZE(driver_map); i++) {
if (vendor_id != driver_map[i].vendor_id)
continue;
}
void
-loader_set_logger(void (*logger)(int level, const char *fmt, ...))
+loader_set_logger(loader_logger *logger)
{
log_ = logger;
}
-/* XXX: Local definition to avoid pulling the heavyweight GL/gl.h and
- * GL/internal/dri_interface.h
- */
-
-#ifndef __DRI_DRIVER_GET_EXTENSIONS
-#define __DRI_DRIVER_GET_EXTENSIONS "__driDriverGetExtensions"
-#endif
-
char *
loader_get_extensions_name(const char *driver_name)
{
return name;
}
+
+/**
+ * Opens a DRI driver using its driver name, returning the __DRIextension
+ * entrypoints.
+ *
+ * \param driverName - a name like "i965", "radeon", "nouveau", etc.
+ * \param out_driver - Address where the dlopen() return value will be stored.
+ * \param search_path_vars - NULL-terminated list of env vars that can be used
+ * to override the DEFAULT_DRIVER_DIR search path.
+ */
+const struct __DRIextensionRec **
+loader_open_driver(const char *driver_name,
+ void **out_driver_handle,
+ const char **search_path_vars)
+{
+ char path[PATH_MAX], *search_paths, *next, *end;
+ char *get_extensions_name;
+ const struct __DRIextensionRec **extensions = NULL;
+ const struct __DRIextensionRec **(*get_extensions)(void);
+
+ search_paths = NULL;
+ if (geteuid() == getuid() && search_path_vars) {
+ for (int i = 0; search_path_vars[i] != NULL; i++) {
+ search_paths = getenv(search_path_vars[i]);
+ if (search_paths)
+ break;
+ }
+ }
+ if (search_paths == NULL)
+ search_paths = DEFAULT_DRIVER_DIR;
+
+ void *driver = NULL;
+ end = search_paths + strlen(search_paths);
+ for (char *p = search_paths; p < end; p = next + 1) {
+ int len;
+ next = strchr(p, ':');
+ if (next == NULL)
+ next = end;
+
+ len = next - p;
+#if USE_ELF_TLS
+ snprintf(path, sizeof(path), "%.*s/tls/%s_dri.so", len, p, driver_name);
+ driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
+#endif
+ if (driver == NULL) {
+ snprintf(path, sizeof(path), "%.*s/%s_dri.so", len, p, driver_name);
+ driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
+ if (driver == NULL)
+ log_(_LOADER_DEBUG, "MESA-LOADER: failed to open %s: %s\n",
+ path, dlerror());
+ }
+ /* not need continue to loop all paths once the driver is found */
+ if (driver != NULL)
+ break;
+ }
+
+ if (driver == NULL) {
+ log_(_LOADER_WARNING, "MESA-LOADER: failed to open %s (search paths %s)\n",
+ driver_name, search_paths);
+ *out_driver_handle = NULL;
+ return NULL;
+ }
+
+ log_(_LOADER_DEBUG, "MESA-LOADER: dlopen(%s)\n", path);
+
+ get_extensions_name = loader_get_extensions_name(driver_name);
+ if (get_extensions_name) {
+ get_extensions = dlsym(driver, get_extensions_name);
+ if (get_extensions) {
+ extensions = get_extensions();
+ } else {
+ log_(_LOADER_DEBUG, "MESA-LOADER: driver does not expose %s(): %s\n",
+ get_extensions_name, dlerror());
+ }
+ free(get_extensions_name);
+ }
+
+ if (!extensions)
+ extensions = dlsym(driver, __DRI_DRIVER_EXTENSIONS);
+ if (extensions == NULL) {
+ log_(_LOADER_WARNING,
+ "MESA-LOADER: driver exports no extensions (%s)\n", dlerror());
+ dlclose(driver);
+ }
+
+ *out_driver_handle = driver;
+ return extensions;
+}
projects / mesa.git / blobdiff