/* * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org> * Copyright (C) 2014-2016 Emil Velikov <emil.l.velikov@gmail.com> * Copyright (C) 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Authors: * Rob Clark <robclark@freedesktop.org> */ #include <errno.h> #include <fcntl.h> #include <sys/stat.h> #include <stdarg.h> #include <stdio.h> #include <stdbool.h> #include <string.h> #include <unistd.h> #include <stdlib.h> #ifdef MAJOR_IN_MKDEV #include <sys/mkdev.h> #endif #ifdef MAJOR_IN_SYSMACROS #include <sys/sysmacros.h> #endif #include "loader.h" #ifdef HAVE_LIBDRM #include <xf86drm.h> #ifdef USE_DRICONF #include "util/xmlconfig.h" #include "util/xmlpool.h" #endif #endif #define __IS_LOADER #include "pci_id_driver_map.h" static void default_logger(int level, const char *fmt, ...) { if (level <= _LOADER_WARNING) { va_list args; va_start(args, fmt); vfprintf(stderr, fmt, args); va_end(args); } } static void (*log_)(int level, const char *fmt, ...) = default_logger; int loader_open_device(const char *device_name) { int fd; #ifdef O_CLOEXEC fd = open(device_name, O_RDWR | O_CLOEXEC); if (fd == -1 && errno == EINVAL) #endif { fd = open(device_name, O_RDWR); if (fd != -1) fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC); } return fd; } #if defined(HAVE_LIBDRM) #ifdef USE_DRICONF static const char __driConfigOptionsLoader[] = DRI_CONF_BEGIN DRI_CONF_SECTION_INITIALIZATION DRI_CONF_DEVICE_ID_PATH_TAG() DRI_CONF_SECTION_END DRI_CONF_END; static char *loader_get_dri_config_device_id(void) { driOptionCache defaultInitOptions; driOptionCache userInitOptions; char *prime = NULL; driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader); driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0, "loader"); if (driCheckOption(&userInitOptions, "device_id", DRI_STRING)) prime = strdup(driQueryOptionstr(&userInitOptions, "device_id")); driDestroyOptionCache(&userInitOptions); driDestroyOptionInfo(&defaultInitOptions); return prime; } #endif static char *drm_construct_id_path_tag(drmDevicePtr device) { char *tag = NULL; if (device->bustype == DRM_BUS_PCI) { if (asprintf(&tag, "pci-%04x_%02x_%02x_%1u", device->businfo.pci->domain, device->businfo.pci->bus, device->businfo.pci->dev, device->businfo.pci->func) < 0) { return NULL; } } else if (device->bustype == DRM_BUS_PLATFORM || device->bustype == DRM_BUS_HOST1X) { char *fullname, *name, *address; if (device->bustype == DRM_BUS_PLATFORM) fullname = device->businfo.platform->fullname; else fullname = device->businfo.host1x->fullname; name = strrchr(fullname, '/'); if (!name) name = strdup(fullname); else name = strdup(name + 1); address = strchr(name, '@'); if (address) { *address++ = '\0'; if (asprintf(&tag, "platform-%s_%s", address, name) < 0) tag = NULL; } else { if (asprintf(&tag, "platform-%s", name) < 0) tag = NULL; } free(name); } return tag; } static bool drm_device_matches_tag(drmDevicePtr device, const char *prime_tag) { char *tag = drm_construct_id_path_tag(device); int ret; if (tag == NULL) return false; ret = strcmp(tag, prime_tag); free(tag); return ret == 0; } static char *drm_get_id_path_tag_for_fd(int fd) { drmDevicePtr device; char *tag; if (drmGetDevice2(fd, 0, &device) != 0) return NULL; tag = drm_construct_id_path_tag(device); drmFreeDevice(&device); return tag; } 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; if (dri_prime) prime = strdup(dri_prime); #ifdef USE_DRICONF else prime = loader_get_dri_config_device_id(); #endif if (prime == NULL) { *different_device = false; return default_fd; } default_tag = drm_get_id_path_tag_for_fd(default_fd); if (default_tag == NULL) goto err; num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES); 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)) { found = true; break; } } } 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; } } } if (!found) { drmFreeDevices(devices, num_devices); goto err; } fd = loader_open_device(devices[i]->nodes[DRM_NODE_RENDER]); drmFreeDevices(devices, num_devices); if (fd < 0) goto err; close(default_fd); *different_device = !!strcmp(default_tag, prime); free(default_tag); free(prime); return fd; err: *different_device = false; free(default_tag); free(prime); return default_fd; } #else int loader_get_user_preferred_fd(int default_fd, bool *different_device) { *different_device = false; return default_fd; } #endif #if defined(HAVE_LIBDRM) static int drm_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) { drmDevicePtr device; int 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; } else { log_(_LOADER_DEBUG, "MESA-LOADER: device is not located on the PCI bus\n"); ret = 0; } drmFreeDevice(&device); } else { log_(_LOADER_WARNING, "MESA-LOADER: failed to retrieve device information\n"); ret = 0; } return ret; } #endif int 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; #endif return 0; } char * loader_get_device_name_for_fd(int fd) { char *result = NULL; #if HAVE_LIBDRM result = drmGetDeviceNameFromFd2(fd); #endif return result; } char * loader_get_driver_for_fd(int fd) { int vendor_id, chip_id, i, j; char *driver = NULL; /* Allow an environment variable to force choosing a different driver * binary. If that driver binary can't survive on this FD, that's the * user's problem, but this allows vc4 simulator to run on an i965 host, * and may be useful for some touch testing of i915 on an i965 host. */ if (geteuid() == getuid()) { driver = getenv("MESA_LOADER_DRIVER_OVERRIDE"); if (driver) return strdup(driver); } if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) { #if HAVE_LIBDRM /* fallback to drmGetVersion(): */ drmVersionPtr version = drmGetVersion(fd); if (!version) { log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd); return NULL; } driver = strndup(version->name, version->name_len); log_(_LOADER_INFO, "using driver %s for %d\n", driver, fd); drmFreeVersion(version); #endif return driver; } for (i = 0; driver_map[i].driver; i++) { if (vendor_id != driver_map[i].vendor_id) continue; if (driver_map[i].predicate && !driver_map[i].predicate(fd)) continue; if (driver_map[i].num_chips_ids == -1) { driver = strdup(driver_map[i].driver); goto out; } for (j = 0; j < driver_map[i].num_chips_ids; j++) if (driver_map[i].chip_ids[j] == chip_id) { driver = strdup(driver_map[i].driver); goto out; } } out: log_(driver ? _LOADER_DEBUG : _LOADER_WARNING, "pci id for fd %d: %04x:%04x, driver %s\n", fd, vendor_id, chip_id, driver); return driver; } void loader_set_logger(void (*logger)(int level, const char *fmt, ...)) { 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) { char *name = NULL; if (asprintf(&name, "%s_%s", __DRI_DRIVER_GET_EXTENSIONS, driver_name) < 0) return NULL; const size_t len = strlen(name); for (size_t i = 0; i < len; i++) { if (name[i] == '-') name[i] = '_'; } return name; }