diff options
Diffstat (limited to 'drivers/staging/mei/wd.c')
| -rw-r--r-- | drivers/staging/mei/wd.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/drivers/staging/mei/wd.c b/drivers/staging/mei/wd.c deleted file mode 100644 index 2564b038636..00000000000 --- a/drivers/staging/mei/wd.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * - * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2011, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/device.h> -#include <linux/pci.h> -#include <linux/sched.h> - -#include "mei_dev.h" -#include "hw.h" -#include "interface.h" -#include "mei.h" - -/* - * MEI Watchdog Module Parameters - */ -static u16 watchdog_timeout = AMT_WD_VALUE; -module_param(watchdog_timeout, ushort, 0); -MODULE_PARM_DESC(watchdog_timeout, - "Intel(R) AMT Watchdog timeout value in seconds. (default=" - __MODULE_STRING(AMT_WD_VALUE) - ", disable=0)"); - -static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 }; -static const u8 mei_stop_wd_params[] = { 0x02, 0x02, 0x14, 0x10 }; - -const u8 mei_wd_state_independence_msg[3][4] = { - {0x05, 0x02, 0x51, 0x10}, - {0x05, 0x02, 0x52, 0x10}, - {0x07, 0x02, 0x01, 0x10} -}; - -/* UUIDs for AMT F/W clients */ -const uuid_le mei_wd_guid = UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, 0x89, - 0x9D, 0xA9, 0x15, 0x14, 0xCB, - 0x32, 0xAB); - - -void mei_wd_start_setup(struct mei_device *dev) -{ - dev_dbg(&dev->pdev->dev, "dev->wd_timeout=%d.\n", dev->wd_timeout); - memcpy(dev->wd_data, mei_start_wd_params, MEI_WD_PARAMS_SIZE); - memcpy(dev->wd_data + MEI_WD_PARAMS_SIZE, - &dev->wd_timeout, sizeof(u16)); -} - -/** - * host_init_wd - mei initialization wd. - * - * @dev: the device structure - */ -void mei_wd_host_init(struct mei_device *dev) -{ - mei_init_file_private(&dev->wd_cl, dev); - - /* look for WD client and connect to it */ - dev->wd_cl.state = MEI_FILE_DISCONNECTED; - dev->wd_timeout = watchdog_timeout; - - if (dev->wd_timeout > 0) { - mei_wd_start_setup(dev); - /* find ME WD client */ - mei_find_me_client_update_filext(dev, &dev->wd_cl, - &mei_wd_guid, MEI_WD_HOST_CLIENT_ID); - - dev_dbg(&dev->pdev->dev, "check wd_cl\n"); - if (MEI_FILE_CONNECTING == dev->wd_cl.state) { - if (!mei_connect(dev, &dev->wd_cl)) { - dev_dbg(&dev->pdev->dev, "Failed to connect to WD client\n"); - dev->wd_cl.state = MEI_FILE_DISCONNECTED; - dev->wd_cl.host_client_id = 0; - host_init_iamthif(dev) ; - } else { - dev->wd_cl.timer_count = CONNECT_TIMEOUT; - } - } else { - dev_dbg(&dev->pdev->dev, "Failed to find WD client\n"); - host_init_iamthif(dev) ; - } - } else { - dev->wd_bypass = true; - dev_dbg(&dev->pdev->dev, "WD requested to be disabled\n"); - host_init_iamthif(dev) ; - } -} - -/** - * mei_wd_send - sends watch dog message to fw. - * - * @dev: the device structure - * - * returns 0 if success, - * -EIO when message send fails - * -EINVAL when invalid message is to be sent - */ -int mei_wd_send(struct mei_device *dev) -{ - struct mei_msg_hdr *mei_hdr; - - mei_hdr = (struct mei_msg_hdr *) &dev->wr_msg_buf[0]; - mei_hdr->host_addr = dev->wd_cl.host_client_id; - mei_hdr->me_addr = dev->wd_cl.me_client_id; - mei_hdr->msg_complete = 1; - mei_hdr->reserved = 0; - - if (!memcmp(dev->wd_data, mei_start_wd_params, MEI_WD_PARAMS_SIZE)) - mei_hdr->length = MEI_START_WD_DATA_SIZE; - else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_PARAMS_SIZE)) - mei_hdr->length = MEI_WD_PARAMS_SIZE; - else - return -EINVAL; - - if (mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length)) - return 0; - return -EIO; -} - -int mei_wd_stop(struct mei_device *dev, bool preserve) -{ - int ret; - u16 wd_timeout = dev->wd_timeout; - - cancel_delayed_work(&dev->wd_work); - if (dev->wd_cl.state != MEI_FILE_CONNECTED || !dev->wd_timeout) - return 0; - - dev->wd_timeout = 0; - dev->wd_due_counter = 0; - memcpy(dev->wd_data, mei_stop_wd_params, MEI_WD_PARAMS_SIZE); - dev->stop = 1; - - ret = mei_flow_ctrl_creds(dev, &dev->wd_cl); - if (ret < 0) - goto out; - - if (ret && dev->mei_host_buffer_is_empty) { - ret = 0; - dev->mei_host_buffer_is_empty = 0; - - if (!mei_wd_send(dev)) { - ret = mei_flow_ctrl_reduce(dev, &dev->wd_cl); - if (ret) - goto out; - } else { - dev_dbg(&dev->pdev->dev, "send stop WD failed\n"); - } - - dev->wd_pending = 0; - } else { - dev->wd_pending = 1; - } - dev->wd_stopped = 0; - mutex_unlock(&dev->device_lock); - - ret = wait_event_interruptible_timeout(dev->wait_stop_wd, - dev->wd_stopped, 10 * HZ); - mutex_lock(&dev->device_lock); - if (!dev->wd_stopped) - dev_dbg(&dev->pdev->dev, "stop wd failed to complete.\n"); - else - dev_dbg(&dev->pdev->dev, "stop wd complete.\n"); - - if (preserve) - dev->wd_timeout = wd_timeout; - -out: - return ret; -} - |