mirror of https://gitlab.freedesktop.org/mesa/mesa
728 lines
19 KiB
C
728 lines
19 KiB
C
/*
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* Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
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* Copyright (C) 2014-2016 Emil Velikov <emil.l.velikov@gmail.com>
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* Copyright (C) 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Rob Clark <robclark@freedesktop.org>
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*/
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#include <dlfcn.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <sys/param.h>
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#ifdef MAJOR_IN_MKDEV
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#include <sys/mkdev.h>
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#endif
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#ifdef MAJOR_IN_SYSMACROS
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#include <sys/sysmacros.h>
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#endif
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#include <GL/gl.h>
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#include <GL/internal/dri_interface.h>
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#include "loader.h"
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#include "util/os_file.h"
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#include "util/os_misc.h"
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#ifdef HAVE_LIBDRM
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#include <xf86drm.h>
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#define MAX_DRM_DEVICES 64
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#ifdef USE_DRICONF
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#include "util/xmlconfig.h"
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#include "util/driconf.h"
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#endif
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#endif
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#include "util/macros.h"
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#define __IS_LOADER
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#include "pci_id_driver_map.h"
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/* For systems like Hurd */
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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static void default_logger(int level, const char *fmt, ...)
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{
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if (level <= _LOADER_WARNING) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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}
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}
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static loader_logger *log_ = default_logger;
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int
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loader_open_device(const char *device_name)
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{
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int fd;
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#ifdef O_CLOEXEC
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fd = open(device_name, O_RDWR | O_CLOEXEC);
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if (fd == -1 && errno == EINVAL)
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#endif
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{
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fd = open(device_name, O_RDWR);
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if (fd != -1)
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fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
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}
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if (fd == -1 && errno == EACCES) {
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log_(_LOADER_WARNING, "failed to open %s: %s\n",
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device_name, strerror(errno));
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}
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return fd;
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}
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static char *loader_get_kernel_driver_name(int fd)
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{
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#if HAVE_LIBDRM
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char *driver;
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drmVersionPtr version = drmGetVersion(fd);
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if (!version) {
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log_(_LOADER_WARNING, "failed to get driver name for fd %d\n", fd);
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return NULL;
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}
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driver = strndup(version->name, version->name_len);
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log_(driver ? _LOADER_DEBUG : _LOADER_WARNING, "using driver %s for %d\n",
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driver, fd);
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drmFreeVersion(version);
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return driver;
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#else
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return NULL;
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#endif
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}
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bool
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is_kernel_i915(int fd)
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{
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char *kernel_driver = loader_get_kernel_driver_name(fd);
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bool is_i915 = kernel_driver && strcmp(kernel_driver, "i915") == 0;
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free(kernel_driver);
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return is_i915;
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}
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#if defined(HAVE_LIBDRM)
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int
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loader_open_render_node(const char *name)
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{
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drmDevicePtr devices[MAX_DRM_DEVICES], device;
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int i, num_devices, fd = -1;
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num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES);
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if (num_devices <= 0)
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return -ENOENT;
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for (i = 0; i < num_devices; i++) {
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device = devices[i];
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if ((device->available_nodes & (1 << DRM_NODE_RENDER)) &&
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(device->bustype == DRM_BUS_PLATFORM)) {
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drmVersionPtr version;
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fd = loader_open_device(device->nodes[DRM_NODE_RENDER]);
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if (fd < 0)
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continue;
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version = drmGetVersion(fd);
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if (!version) {
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close(fd);
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continue;
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}
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if (strcmp(version->name, name) != 0) {
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drmFreeVersion(version);
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close(fd);
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continue;
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}
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drmFreeVersion(version);
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break;
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}
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}
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drmFreeDevices(devices, num_devices);
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if (i == num_devices)
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return -ENOENT;
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return fd;
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}
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char *
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loader_get_render_node(dev_t device)
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{
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char *render_node = NULL;
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drmDevicePtr dev_ptr;
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if (drmGetDeviceFromDevId(device, 0, &dev_ptr) < 0)
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return NULL;
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if (dev_ptr->available_nodes & (1 << DRM_NODE_RENDER)) {
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render_node = strdup(dev_ptr->nodes[DRM_NODE_RENDER]);
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if (!render_node)
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log_(_LOADER_DEBUG, "MESA-LOADER: failed to allocate memory for render node\n");
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}
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drmFreeDevice(&dev_ptr);
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return render_node;
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}
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#ifdef USE_DRICONF
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static const driOptionDescription __driConfigOptionsLoader[] = {
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DRI_CONF_SECTION_INITIALIZATION
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DRI_CONF_DEVICE_ID_PATH_TAG()
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DRI_CONF_DRI_DRIVER()
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DRI_CONF_SECTION_END
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};
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static char *loader_get_dri_config_driver(int fd)
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{
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driOptionCache defaultInitOptions;
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driOptionCache userInitOptions;
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char *dri_driver = NULL;
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char *kernel_driver = loader_get_kernel_driver_name(fd);
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driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader,
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ARRAY_SIZE(__driConfigOptionsLoader));
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driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0,
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"loader", kernel_driver, NULL, NULL, 0, NULL, 0);
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if (driCheckOption(&userInitOptions, "dri_driver", DRI_STRING)) {
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char *opt = driQueryOptionstr(&userInitOptions, "dri_driver");
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/* not an empty string */
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if (*opt)
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dri_driver = strdup(opt);
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}
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driDestroyOptionCache(&userInitOptions);
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driDestroyOptionInfo(&defaultInitOptions);
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free(kernel_driver);
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return dri_driver;
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}
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static char *loader_get_dri_config_device_id(void)
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{
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driOptionCache defaultInitOptions;
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driOptionCache userInitOptions;
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char *prime = NULL;
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driParseOptionInfo(&defaultInitOptions, __driConfigOptionsLoader,
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ARRAY_SIZE(__driConfigOptionsLoader));
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driParseConfigFiles(&userInitOptions, &defaultInitOptions, 0,
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"loader", NULL, NULL, NULL, 0, NULL, 0);
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if (driCheckOption(&userInitOptions, "device_id", DRI_STRING)) {
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char *opt = driQueryOptionstr(&userInitOptions, "device_id");
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if (*opt)
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prime = strdup(opt);
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}
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driDestroyOptionCache(&userInitOptions);
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driDestroyOptionInfo(&defaultInitOptions);
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return prime;
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}
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#endif
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static char *drm_construct_id_path_tag(drmDevicePtr device)
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{
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char *tag = NULL;
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if (device->bustype == DRM_BUS_PCI) {
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if (asprintf(&tag, "pci-%04x_%02x_%02x_%1u",
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device->businfo.pci->domain,
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device->businfo.pci->bus,
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device->businfo.pci->dev,
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device->businfo.pci->func) < 0) {
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return NULL;
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}
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} else if (device->bustype == DRM_BUS_PLATFORM ||
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device->bustype == DRM_BUS_HOST1X) {
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char *fullname, *name, *address;
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if (device->bustype == DRM_BUS_PLATFORM)
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fullname = device->businfo.platform->fullname;
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else
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fullname = device->businfo.host1x->fullname;
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name = strrchr(fullname, '/');
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if (!name)
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name = strdup(fullname);
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else
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name = strdup(name + 1);
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address = strchr(name, '@');
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if (address) {
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*address++ = '\0';
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if (asprintf(&tag, "platform-%s_%s", address, name) < 0)
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tag = NULL;
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} else {
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if (asprintf(&tag, "platform-%s", name) < 0)
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tag = NULL;
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}
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free(name);
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}
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return tag;
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}
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static bool drm_device_matches_tag(drmDevicePtr device, const char *prime_tag)
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{
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char *tag = drm_construct_id_path_tag(device);
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int ret;
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if (tag == NULL)
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return false;
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ret = strcmp(tag, prime_tag);
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free(tag);
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return ret == 0;
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}
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static char *drm_get_id_path_tag_for_fd(int fd)
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{
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drmDevicePtr device;
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char *tag;
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if (drmGetDevice2(fd, 0, &device) != 0)
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return NULL;
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tag = drm_construct_id_path_tag(device);
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drmFreeDevice(&device);
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return tag;
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}
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int loader_get_user_preferred_fd(int default_fd, bool *different_device)
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{
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const char *dri_prime = getenv("DRI_PRIME");
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char *default_tag, *prime = NULL;
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drmDevicePtr devices[MAX_DRM_DEVICES];
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int i, num_devices, fd = -1;
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bool prime_is_vid_did;
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uint16_t vendor_id, device_id;
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if (dri_prime)
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prime = strdup(dri_prime);
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#ifdef USE_DRICONF
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else
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prime = loader_get_dri_config_device_id();
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#endif
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if (prime == NULL) {
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*different_device = false;
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return default_fd;
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} else {
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prime_is_vid_did = sscanf(prime, "%hx:%hx", &vendor_id, &device_id) == 2;
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}
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default_tag = drm_get_id_path_tag_for_fd(default_fd);
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if (default_tag == NULL)
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goto err;
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num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES);
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if (num_devices <= 0)
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goto err;
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for (i = 0; i < num_devices; i++) {
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if (!(devices[i]->available_nodes & 1 << DRM_NODE_RENDER))
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continue;
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/* three formats of DRI_PRIME are supported:
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* "1": choose any other card than the card used by default.
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* id_path_tag: (for example "pci-0000_02_00_0") choose the card
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* with this id_path_tag.
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* vendor_id:device_id
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*/
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if (!strcmp(prime,"1")) {
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if (drm_device_matches_tag(devices[i], default_tag))
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continue;
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} else {
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if (prime_is_vid_did && devices[i]->bustype == DRM_BUS_PCI &&
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devices[i]->deviceinfo.pci->vendor_id == vendor_id &&
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devices[i]->deviceinfo.pci->device_id == device_id) {
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/* Update prime for the "different_device"
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* determination below. */
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free(prime);
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prime = drm_construct_id_path_tag(devices[i]);
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} else {
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if (!drm_device_matches_tag(devices[i], prime))
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continue;
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}
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}
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fd = loader_open_device(devices[i]->nodes[DRM_NODE_RENDER]);
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break;
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}
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drmFreeDevices(devices, num_devices);
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if (i == num_devices)
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goto err;
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if (fd < 0)
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goto err;
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close(default_fd);
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*different_device = !!strcmp(default_tag, prime);
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free(default_tag);
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free(prime);
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return fd;
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err:
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*different_device = false;
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free(default_tag);
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free(prime);
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return default_fd;
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}
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#else
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int
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loader_open_render_node(const char *name)
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{
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return -1;
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}
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char *
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loader_get_render_node(dev_t device)
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{
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return NULL;
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}
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int loader_get_user_preferred_fd(int default_fd, bool *different_device)
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{
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*different_device = false;
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return default_fd;
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}
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#endif
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#if defined(HAVE_LIBDRM)
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static bool
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drm_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
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{
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drmDevicePtr device;
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if (drmGetDevice2(fd, 0, &device) != 0) {
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log_(_LOADER_WARNING, "MESA-LOADER: failed to retrieve device information\n");
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return false;
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}
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if (device->bustype != DRM_BUS_PCI) {
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drmFreeDevice(&device);
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log_(_LOADER_DEBUG, "MESA-LOADER: device is not located on the PCI bus\n");
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return false;
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}
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*vendor_id = device->deviceinfo.pci->vendor_id;
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*chip_id = device->deviceinfo.pci->device_id;
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drmFreeDevice(&device);
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return true;
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}
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#endif
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#ifdef __linux__
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static int loader_get_linux_pci_field(int maj, int min, const char *field)
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{
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char path[PATH_MAX + 1];
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snprintf(path, sizeof(path), "/sys/dev/char/%d:%d/device/%s", maj, min, field);
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char *field_str = os_read_file(path, NULL);
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if (!field_str) {
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/* Probably non-PCI device. */
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return 0;
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}
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int value = (int)strtoll(field_str, NULL, 16);
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free(field_str);
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return value;
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}
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static bool
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loader_get_linux_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
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{
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struct stat sbuf;
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if (fstat(fd, &sbuf) != 0) {
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log_(_LOADER_DEBUG, "MESA-LOADER: failed to fstat fd\n");
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return false;
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}
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int maj = major(sbuf.st_rdev);
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int min = minor(sbuf.st_rdev);
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*vendor_id = loader_get_linux_pci_field(maj, min, "vendor");
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*chip_id = loader_get_linux_pci_field(maj, min, "device");
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return *vendor_id && *chip_id;
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}
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#endif /* __linux__ */
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bool
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loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
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{
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#ifdef __linux__
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/* Implementation without causing full enumeration of DRM devices. */
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if (loader_get_linux_pci_id_for_fd(fd, vendor_id, chip_id))
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return true;
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#endif
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#if HAVE_LIBDRM
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return drm_get_pci_id_for_fd(fd, vendor_id, chip_id);
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#endif
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return false;
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}
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char *
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loader_get_device_name_for_fd(int fd)
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{
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char *result = NULL;
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#if HAVE_LIBDRM
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result = drmGetDeviceNameFromFd2(fd);
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#endif
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return result;
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}
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static char *
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loader_get_pci_driver(int fd)
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{
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int vendor_id, chip_id, i, j;
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char *driver = NULL;
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if (!loader_get_pci_id_for_fd(fd, &vendor_id, &chip_id))
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return NULL;
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for (i = 0; i < ARRAY_SIZE(driver_map); i++) {
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if (vendor_id != driver_map[i].vendor_id)
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continue;
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if (driver_map[i].predicate && !driver_map[i].predicate(fd))
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continue;
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if (driver_map[i].num_chips_ids == -1) {
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driver = strdup(driver_map[i].driver);
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goto out;
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}
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for (j = 0; j < driver_map[i].num_chips_ids; j++)
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if (driver_map[i].chip_ids[j] == chip_id) {
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driver = strdup(driver_map[i].driver);
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goto out;
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}
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}
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|
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;
|
|
}
|
|
|
|
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()) {
|
|
const char *override = os_get_option("MESA_LOADER_DRIVER_OVERRIDE");
|
|
if (override)
|
|
return strdup(override);
|
|
}
|
|
|
|
#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(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 driver or backend using its name, returning the library handle.
|
|
*
|
|
* \param driverName - a name like "i965", "radeon", "nouveau", etc.
|
|
* \param lib_suffix - a suffix to append to the driver name to generate the
|
|
* full library name.
|
|
* \param search_path_vars - NULL-terminated list of env vars that can be used
|
|
* \param default_search_path - a colon-separted list of directories used if
|
|
* search_path_vars is NULL or none of the vars are set in the environment.
|
|
* \param warn_on_fail - Log a warning if the driver is not found.
|
|
*/
|
|
void *
|
|
loader_open_driver_lib(const char *driver_name,
|
|
const char *lib_suffix,
|
|
const char **search_path_vars,
|
|
const char *default_search_path,
|
|
bool warn_on_fail)
|
|
{
|
|
char path[PATH_MAX];
|
|
const char *search_paths, *next, *end;
|
|
|
|
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_search_path;
|
|
|
|
void *driver = NULL;
|
|
const char *dl_error = NULL;
|
|
end = search_paths + strlen(search_paths);
|
|
for (const char *p = search_paths; p < end; p = next + 1) {
|
|
int len;
|
|
next = strchr(p, ':');
|
|
if (next == NULL)
|
|
next = end;
|
|
|
|
len = next - p;
|
|
snprintf(path, sizeof(path), "%.*s/tls/%s%s.so", len,
|
|
p, driver_name, lib_suffix);
|
|
driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
|
|
if (driver == NULL) {
|
|
snprintf(path, sizeof(path), "%.*s/%s%s.so", len,
|
|
p, driver_name, lib_suffix);
|
|
driver = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
|
|
if (driver == NULL) {
|
|
dl_error = dlerror();
|
|
log_(_LOADER_DEBUG, "MESA-LOADER: failed to open %s: %s\n",
|
|
path, dl_error);
|
|
}
|
|
}
|
|
/* not need continue to loop all paths once the driver is found */
|
|
if (driver != NULL)
|
|
break;
|
|
}
|
|
|
|
if (driver == NULL) {
|
|
if (warn_on_fail) {
|
|
log_(_LOADER_WARNING,
|
|
"MESA-LOADER: failed to open %s: %s (search paths %s, suffix %s)\n",
|
|
driver_name, dl_error, search_paths, lib_suffix);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
log_(_LOADER_DEBUG, "MESA-LOADER: dlopen(%s)\n", path);
|
|
|
|
return driver;
|
|
}
|
|
|
|
/**
|
|
* 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 *get_extensions_name;
|
|
const struct __DRIextensionRec **extensions = NULL;
|
|
const struct __DRIextensionRec **(*get_extensions)(void);
|
|
void *driver = loader_open_driver_lib(driver_name, "_dri", search_path_vars,
|
|
DEFAULT_DRIVER_DIR, true);
|
|
|
|
if (!driver)
|
|
goto failed;
|
|
|
|
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);
|
|
driver = NULL;
|
|
}
|
|
|
|
failed:
|
|
*out_driver_handle = driver;
|
|
return extensions;
|
|
}
|