| /* |
| * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org> |
| * |
| * This code is derived from the following files. |
| * |
| * * src/glx/dri3_common.c |
| * Copyright © 2013 Keith Packard |
| * |
| * * src/egl/drivers/dri2/common.c |
| * * src/gbm/backends/dri/driver_name.c |
| * Copyright © 2011 Intel Corporation |
| * |
| * Authors: |
| * Kristian Høgsberg <krh@bitplanet.net> |
| * Benjamin Franzke <benjaminfranzke@googlemail.com> |
| * |
| * * src/gallium/targets/egl-static/egl.c |
| * Copyright (C) 2010-2011 LunarG Inc. |
| * |
| * Authors: |
| * Chia-I Wu <olv@lunarg.com> |
| * |
| * * src/gallium/state_trackers/egl/drm/native_drm.c |
| * Copyright (C) 2010 Chia-I Wu <olv@0xlab.org> |
| * |
| * * src/egl/drivers/dri2/platform_android.c |
| * |
| * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com> |
| * Copyright (C) 2010-2011 LunarG Inc. |
| * |
| * Based on platform_x11, which has |
| * |
| * Copyright © 2011 Intel Corporation |
| * |
| * * src/gallium/auxiliary/pipe-loader/pipe_loader_drm.c |
| * Copyright 2011 Intel Corporation |
| * Copyright 2012 Francisco Jerez |
| * All Rights Reserved. |
| * |
| * Authors: |
| * Kristian Høgsberg <krh@bitplanet.net> |
| * Benjamin Franzke <benjaminfranzke@googlemail.com> |
| * |
| * 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> |
| #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 <stdlib.h> |
| #include <unistd.h> |
| #include <xf86drm.h> |
| #ifdef USE_DRICONF |
| #include "xmlconfig.h" |
| #include "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) |
| { |
| /* Length of "pci-xxxx_xx_xx_x\0" */ |
| #define PCI_ID_PATH_TAG_LENGTH 17 |
| char *tag = NULL; |
| |
| if (device->bustype == DRM_BUS_PCI) { |
| tag = calloc(PCI_ID_PATH_TAG_LENGTH, sizeof(char)); |
| if (tag == NULL) |
| return NULL; |
| |
| snprintf(tag, PCI_ID_PATH_TAG_LENGTH, "pci-%04x_%02x_%02x_%1u", |
| device->businfo.pci->domain, device->businfo.pci->bus, |
| device->businfo.pci->dev, device->businfo.pci->func); |
| } |
| 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 (drmGetDevice(fd, &device) != 0) |
| return NULL; |
| |
| tag = drm_construct_id_path_tag(device); |
| drmFreeDevice(&device); |
| return tag; |
| } |
| |
| int loader_get_user_preferred_fd(int default_fd, int *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 = 0; |
| return default_fd; |
| } |
| |
| default_tag = drm_get_id_path_tag_for_fd(default_fd); |
| if (default_tag == NULL) |
| goto err; |
| |
| num_devices = drmGetDevices(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 = 0; |
| |
| free(default_tag); |
| free(prime); |
| return default_fd; |
| } |
| #else |
| int loader_get_user_preferred_fd(int default_fd, int *different_device) |
| { |
| *different_device = 0; |
| return default_fd; |
| } |
| #endif |
| |
| #if defined(HAVE_SYSFS) || defined(HAVE_LIBDRM) |
| static int |
| dev_node_from_fd(int fd, unsigned int *maj, unsigned int *min) |
| { |
| struct stat buf; |
| |
| if (fstat(fd, &buf) < 0) { |
| log_(_LOADER_WARNING, "MESA-LOADER: failed to stat fd %d\n", fd); |
| return -1; |
| } |
| |
| if (!S_ISCHR(buf.st_mode)) { |
| log_(_LOADER_WARNING, "MESA-LOADER: fd %d not a character device\n", fd); |
| return -1; |
| } |
| |
| *maj = major(buf.st_rdev); |
| *min = minor(buf.st_rdev); |
| |
| return 0; |
| } |
| #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 (drmGetDevice(fd, &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_WARNING, "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; |
| } |
| |
| |
| #if HAVE_SYSFS |
| static char * |
| sysfs_get_device_name_for_fd(int fd) |
| { |
| char *device_name = NULL; |
| unsigned int maj, min; |
| FILE *f; |
| char buf[0x40]; |
| static const char match[9] = "\nDEVNAME="; |
| int expected = 1; |
| |
| if (dev_node_from_fd(fd, &maj, &min) < 0) |
| return NULL; |
| |
| snprintf(buf, sizeof(buf), "/sys/dev/char/%d:%d/uevent", maj, min); |
| if (!(f = fopen(buf, "r"))) |
| return NULL; |
| |
| while (expected < sizeof(match)) { |
| int c = getc(f); |
| |
| if (c == EOF) { |
| fclose(f); |
| return NULL; |
| } else if (c == match[expected] ) |
| expected++; |
| else |
| expected = 0; |
| } |
| |
| strcpy(buf, "/dev/"); |
| if (fgets(buf + 5, sizeof(buf) - 5, f)) { |
| buf[strcspn(buf, "\n")] = '\0'; |
| device_name = strdup(buf); |
| } |
| |
| fclose(f); |
| return device_name; |
| } |
| #endif |
| |
| #if defined(HAVE_LIBDRM) |
| static char * |
| drm_get_device_name_for_fd(int fd) |
| { |
| unsigned int maj, min; |
| char buf[0x40]; |
| int n; |
| |
| if (dev_node_from_fd(fd, &maj, &min) < 0) |
| return NULL; |
| |
| n = snprintf(buf, sizeof(buf), DRM_DEV_NAME, DRM_DIR_NAME, min); |
| if (n == -1 || n >= sizeof(buf)) |
| return NULL; |
| |
| return strdup(buf); |
| } |
| #endif |
| |
| char * |
| loader_get_device_name_for_fd(int fd) |
| { |
| char *result = NULL; |
| |
| #if HAVE_SYSFS |
| if ((result = sysfs_get_device_name_for_fd(fd))) |
| return result; |
| #endif |
| #if HAVE_LIBDRM |
| if ((result = drm_get_device_name_for_fd(fd))) |
| return result; |
| #endif |
| return result; |
| } |
| |
| char * |
| loader_get_driver_for_fd(int fd, unsigned driver_types) |
| { |
| int vendor_id, chip_id, i, j; |
| char *driver = NULL; |
| |
| if (!driver_types) |
| driver_types = _LOADER_GALLIUM | _LOADER_DRI; |
| |
| 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_types & driver_map[i].driver_types)) |
| 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; |
| } |