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/*
* 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;
}
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