X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Floader%2Floader.c;h=8548cbdfedb369b7e855adb603e6f2275d8543aa;hb=e9add0c501c3765cae43ef60ec58404c2340991b;hp=5d2589943088fa1baed88cda97a5114898bd4241;hpb=63546b8e3d217d81a67f6f291fab48b3f381a9ca;p=mesa.git diff --git a/src/loader/loader.c b/src/loader/loader.c index 5d258994308..8548cbdfedb 100644 --- a/src/loader/loader.c +++ b/src/loader/loader.c @@ -1,45 +1,7 @@ /* * Copyright (C) 2013 Rob Clark - * - * 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 - * Benjamin Franzke - * - * * src/gallium/targets/egl-static/egl.c - * Copyright (C) 2010-2011 LunarG Inc. - * - * Authors: - * Chia-I Wu - * - * * src/gallium/state_trackers/egl/drm/native_drm.c - * Copyright (C) 2010 Chia-I Wu - * - * * src/egl/drivers/dri2/platform_android.c - * - * Copyright (C) 2010-2011 Chia-I Wu - * 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 - * Benjamin Franzke + * Copyright (C) 2014-2016 Emil Velikov + * 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"), @@ -64,21 +26,46 @@ * Rob Clark */ +#include +#include +#include +#include #include #include +#include #include -#ifdef HAVE_LIBUDEV -#include -#include +#include +#include +#include +#include +#ifdef MAJOR_IN_MKDEV +#include +#endif +#ifdef MAJOR_IN_SYSMACROS +#include #endif +#include +#include #include "loader.h" -#ifndef __NOT_HAVE_DRM_H +#ifdef HAVE_LIBDRM #include +#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_ids/pci_id_driver_map.h" +#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, ...) { @@ -90,261 +77,371 @@ static void default_logger(int level, const char *fmt, ...) } } -static void (*log_)(int level, const char *fmt, ...) = default_logger; - -#ifdef HAVE_LIBUDEV -#include +static loader_logger *log_ = default_logger; -static void *udev_handle = NULL; +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); + } + if (fd == -1 && errno == EACCES) { + log_(_LOADER_WARNING, "failed to open %s: %s\n", + device_name, strerror(errno)); + } + return fd; +} -static void * -udev_dlopen_handle(void) +static char *loader_get_kernel_driver_name(int fd) { - if (!udev_handle) { - udev_handle = dlopen("libudev.so.1", RTLD_LOCAL | RTLD_LAZY); - - if (!udev_handle) { - /* libudev.so.1 changed the return types of the two unref functions - * from voids to pointers. We don't use those return values, and the - * only ABI I've heard that cares about this kind of change (calling - * a function with a void * return that actually only returns void) - * might be ia64. - */ - udev_handle = dlopen("libudev.so.0", RTLD_LOCAL | RTLD_LAZY); - } +#if HAVE_LIBDRM + char *driver; + drmVersionPtr version = drmGetVersion(fd); + + if (!version) { + log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd); + return NULL; } - return udev_handle; + driver = strndup(version->name, version->name_len); + log_(driver ? _LOADER_DEBUG : _LOADER_WARNING, "using driver %s for %d\n", + driver, fd); + + drmFreeVersion(version); + return driver; +#else + return NULL; +#endif } -static void * -asserted_dlsym(void *dlopen_handle, const char *name) +bool +is_kernel_i915(int fd) { - void *result = dlsym(dlopen_handle, name); - assert(result); - return result; + 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; } -#define UDEV_SYMBOL(ret, name, args) \ - ret (*name) args = asserted_dlsym(udev_dlopen_handle(), #name); +#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; -static inline struct udev_device * -udev_device_new_from_fd(struct udev *udev, int fd) -{ - struct udev_device *device; - struct stat buf; - UDEV_SYMBOL(struct udev_device *, udev_device_new_from_devnum, - (struct udev *udev, char type, dev_t devnum)); + for (i = 0; i < num_devices; i++) { + device = devices[i]; - if (fstat(fd, &buf) < 0) { - log_(_LOADER_WARNING, "MESA-LOADER: failed to stat fd %d\n", fd); - return NULL; - } + if ((device->available_nodes & (1 << DRM_NODE_RENDER)) && + (device->bustype == DRM_BUS_PLATFORM)) { + drmVersionPtr version; - device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev); - if (device == NULL) { - log_(_LOADER_WARNING, - "MESA-LOADER: could not create udev device for fd %d\n", fd); - return NULL; + 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 device; + return fd; } -int -loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +#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) { - struct udev *udev = NULL; - struct udev_device *device = NULL, *parent; - const char *pci_id; - UDEV_SYMBOL(struct udev *, udev_new, (void)); - UDEV_SYMBOL(struct udev_device *, udev_device_get_parent, - (struct udev_device *)); - UDEV_SYMBOL(const char *, udev_device_get_property_value, - (struct udev_device *, const char *)); - UDEV_SYMBOL(struct udev_device *, udev_device_unref, - (struct udev_device *)); - UDEV_SYMBOL(struct udev *, udev_unref, (struct udev *)); - - *chip_id = -1; - - udev = udev_new(); - device = udev_device_new_from_fd(udev, fd); - if (!device) - goto out; - - parent = udev_device_get_parent(device); - if (parent == NULL) { - log_(_LOADER_WARNING, "MESA-LOADER: could not get parent device\n"); - goto out; + 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); - pci_id = udev_device_get_property_value(parent, "PCI_ID"); - if (pci_id == NULL || - sscanf(pci_id, "%x:%x", vendor_id, chip_id) != 2) { - log_(_LOADER_WARNING, "MESA-LOADER: malformed or no PCI ID\n"); - *chip_id = -1; - goto out; - } + free(kernel_driver); + return dri_driver; +} -out: - if (device) - udev_device_unref(device); - if (udev) - udev_unref(udev); +static char *loader_get_dri_config_device_id(void) +{ + driOptionCache defaultInitOptions; + driOptionCache userInitOptions; + char *prime = NULL; + + driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader); + driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0, + "loader", NULL, NULL, 0); + if (driCheckOption(&userInitOptions, "device_id", DRI_STRING)) + prime = strdup(driQueryOptionstr(&userInitOptions, "device_id")); + driDestroyOptionCache(&userInitOptions); + driDestroyOptionInfo(&defaultInitOptions); + + return prime; +} +#endif - return (*chip_id >= 0); +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; } -#elif defined(ANDROID) && !defined(__NOT_HAVE_DRM_H) +static bool drm_device_matches_tag(drmDevicePtr device, const char *prime_tag) +{ + char *tag = drm_construct_id_path_tag(device); + int ret; -/* for i915 */ -#include -/* for radeon */ -#include + if (tag == NULL) + return false; -int -loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) + ret = strcmp(tag, prime_tag); + + free(tag); + return ret == 0; +} + +static char *drm_get_id_path_tag_for_fd(int fd) { - drmVersionPtr version; + drmDevicePtr device; + char *tag; - *chip_id = -1; + if (drmGetDevice2(fd, 0, &device) != 0) + return NULL; - version = drmGetVersion(fd); - if (!version) { - log_(_LOADER_WARNING, "MESA-LOADER: invalid drm fd\n"); - return FALSE; - } - if (!version->name) { - log_(_LOADER_WARNING, "MESA-LOADER: unable to determine the driver name\n"); - drmFreeVersion(version); - return FALSE; + tag = drm_construct_id_path_tag(device); + drmFreeDevice(&device); + return tag; +} + +int loader_get_user_preferred_fd(int default_fd, bool *different_device) +{ + const char *dri_prime = getenv("DRI_PRIME"); + char *default_tag, *prime = NULL; + drmDevicePtr devices[MAX_DRM_DEVICES]; + int i, num_devices, fd = -1; + + 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; } - if (strcmp(version->name, "i915") == 0) { - struct drm_i915_getparam gp; - int ret; + default_tag = drm_get_id_path_tag_for_fd(default_fd); + if (default_tag == NULL) + goto err; - *vendor_id = 0x8086; + num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES); + if (num_devices <= 0) + goto err; - memset(&gp, 0, sizeof(gp)); - gp.param = I915_PARAM_CHIPSET_ID; - gp.value = chip_id; - ret = drmCommandWriteRead(fd, DRM_I915_GETPARAM, &gp, sizeof(gp)); - if (ret) { - log_(_LOADER_WARNING, "MESA-LOADER: failed to get param for i915\n"); - *chip_id = -1; - } - } - else if (strcmp(version->name, "radeon") == 0) { - struct drm_radeon_info info; - int ret; - - *vendor_id = 0x1002; - - memset(&info, 0, sizeof(info)); - info.request = RADEON_INFO_DEVICE_ID; - info.value = (unsigned long) chip_id; - ret = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info)); - if (ret) { - log_(_LOADER_WARNING, "MESA-LOADER: failed to get info for radeon\n"); - *chip_id = -1; + for (i = 0; i < num_devices; i++) { + if (!(devices[i]->available_nodes & 1 << DRM_NODE_RENDER)) + continue; + + /* 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; } + + fd = loader_open_device(devices[i]->nodes[DRM_NODE_RENDER]); + break; } - else if (strcmp(version->name, "nouveau") == 0) { - *vendor_id = 0x10de; - /* not used */ - *chip_id = 0; - } - else if (strcmp(version->name, "vmwgfx") == 0) { - *vendor_id = 0x15ad; - /* assume SVGA II */ - *chip_id = 0x0405; - } + drmFreeDevices(devices, num_devices); - drmFreeVersion(version); + if (i == num_devices) + goto err; - return (*chip_id >= 0); -} + if (fd < 0) + goto err; -#else + 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_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +loader_open_render_node(const char *name) { - return 0; + return -1; } +int loader_get_user_preferred_fd(int default_fd, bool *different_device) +{ + *different_device = false; + return default_fd; +} #endif +#if defined(HAVE_LIBDRM) -char * -loader_get_device_name_for_fd(int fd) +static bool +drm_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) { - char *device_name = NULL; -#ifdef HAVE_LIBUDEV - struct udev *udev; - struct udev_device *device; - const char *const_device_name; - UDEV_SYMBOL(struct udev *, udev_new, (void)); - UDEV_SYMBOL(const char *, udev_device_get_devnode, - (struct udev_device *)); - UDEV_SYMBOL(struct udev_device *, udev_device_unref, - (struct udev_device *)); - UDEV_SYMBOL(struct udev *, udev_unref, (struct udev *)); - - udev = udev_new(); - device = udev_device_new_from_fd(udev, fd); - if (device == NULL) - return NULL; + drmDevicePtr device; - const_device_name = udev_device_get_devnode(device); - if (!const_device_name) - goto out; - device_name = strdup(const_device_name); + if (drmGetDevice2(fd, 0, &device) != 0) { + log_(_LOADER_WARNING, "MESA-LOADER: failed to retrieve device information\n"); + return false; + } -out: - udev_device_unref(device); - udev_unref(udev); + if (device->bustype != DRM_BUS_PCI) { + drmFreeDevice(&device); + log_(_LOADER_DEBUG, "MESA-LOADER: device is not located on the PCI bus\n"); + return false; + } + + *vendor_id = device->deviceinfo.pci->vendor_id; + *chip_id = device->deviceinfo.pci->device_id; + drmFreeDevice(&device); + return true; +} #endif - return device_name; + + +bool +loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id) +{ +#if HAVE_LIBDRM + return drm_get_pci_id_for_fd(fd, vendor_id, chip_id); +#endif + return false; } char * -loader_get_driver_for_fd(int fd, unsigned driver_types) +loader_get_device_name_for_fd(int fd) { - 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)) { - -#ifndef __NOT_HAVE_DRM_H - /* fallback to drmGetVersion(): */ - drmVersionPtr version = drmGetVersion(fd); + char *result = NULL; - if (!version) { - log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd); - return NULL; - } +#if HAVE_LIBDRM + result = drmGetDeviceNameFromFd2(fd); +#endif - driver = strndup(version->name, version->name_len); - log_(_LOADER_INFO, "using driver %s for %d\n", driver, fd); + return result; +} - drmFreeVersion(version); -#endif +static char * +loader_get_pci_driver(int fd) +{ + int vendor_id, chip_id, i, j; + char *driver = NULL; - return driver; - } + if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id)) + return NULL; - 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; - if (!(driver_types & driver_map[i].driver_types)) + if (driver_map[i].predicate && !driver_map[i].predicate(fd)) continue; if (driver_map[i].num_chips_ids == -1) { @@ -366,8 +463,142 @@ out: return driver; } +char * +loader_get_driver_for_fd(int fd) +{ + char *driver; + + /* 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 defined(HAVE_LIBDRM) && defined(USE_DRICONF) + driver = loader_get_dri_config_driver(fd); + if (driver) + return driver; +#endif + + driver = loader_get_pci_driver(fd); + if (!driver) + driver = loader_get_kernel_driver_name(fd); + + return driver; +} + void -loader_set_logger(void (*logger)(int level, const char *fmt, ...)) +loader_set_logger(loader_logger *logger) { log_ = logger; } + +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; +} + +/** + * 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; +}