| /* |
| * Copyright © 2013 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. |
| */ |
| |
| #include "config.h" |
| |
| #include <libudev.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <assert.h> |
| #include <syslog.h> |
| #include "i915_drm.h" |
| #include "intel_l3_parity.h" |
| |
| #ifndef I915_L3_PARITY_UEVENT |
| #define I915_L3_PARITY_UEVENT "L3_PARITY_ERROR" |
| #endif |
| |
| int l3_uevent_setup(struct l3_parity *par) |
| { |
| struct udev *udev; |
| struct udev_monitor *uevent_monitor; |
| fd_set fdset; |
| int fd, ret = -1; |
| |
| udev = udev_new(); |
| if (!udev) { |
| return -1; |
| } |
| |
| uevent_monitor = udev_monitor_new_from_netlink(udev, "udev"); |
| if (!uevent_monitor) |
| goto err_out; |
| |
| ret = udev_monitor_filter_add_match_subsystem_devtype(uevent_monitor, "drm", "drm_minor"); |
| if (ret < 0) |
| goto err_out; |
| |
| ret = udev_monitor_enable_receiving(uevent_monitor); |
| if (ret < 0) |
| goto err_out; |
| |
| fd = udev_monitor_get_fd(uevent_monitor); |
| FD_ZERO(&fdset); |
| FD_SET(fd, &fdset); |
| |
| par->udev = udev; |
| par->fd = fd; |
| par->fdset = fdset; |
| par->uevent_monitor = uevent_monitor; |
| return 0; |
| |
| err_out: |
| udev_unref(udev); |
| return ret; |
| } |
| |
| int l3_listen(struct l3_parity *par, bool daemon, struct l3_location *loc) |
| { |
| struct udev_device *udev_dev; |
| const char *parity_status; |
| char *err_msg; |
| int ret; |
| |
| again: |
| ret = select(par->fd + 1, &par->fdset, NULL, NULL, NULL); |
| /* Number of bits set is returned, must be >= 1 */ |
| if (ret <= 0) { |
| return ret; |
| } |
| |
| assert(FD_ISSET(par->fd, &par->fdset)); |
| |
| udev_dev = udev_monitor_receive_device(par->uevent_monitor); |
| if (!udev_dev) |
| return -1; |
| |
| parity_status = udev_device_get_property_value(udev_dev, I915_L3_PARITY_UEVENT); |
| if (strncmp(parity_status, "1", 1)) |
| goto again; |
| |
| loc->slice = atoi(udev_device_get_property_value(udev_dev, "SLICE")); |
| loc->row = atoi(udev_device_get_property_value(udev_dev, "ROW")); |
| loc->bank = atoi(udev_device_get_property_value(udev_dev, "BANK")); |
| loc->subbank = atoi(udev_device_get_property_value(udev_dev, "SUBBANK")); |
| |
| udev_device_unref(udev_dev); |
| |
| assert(asprintf(&err_msg, "Parity error detected on: %d,%d,%d,%d. " |
| "Try to run intel_l3_parity -r %d -b %d -s %d -w %d -d", |
| loc->slice, loc->row, loc->bank, loc->subbank, |
| loc->row, loc->bank, loc->subbank, loc->slice) != -1); |
| if (daemon) { |
| syslog(LOG_INFO, "%s\n", err_msg); |
| goto again; |
| } |
| |
| fprintf(stderr, "%s\n", err_msg); |
| |
| free(err_msg); |
| |
| return 0; |
| } |