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Diffstat (limited to 'drivers/staging/mei/wd.c')
-rw-r--r--drivers/staging/mei/wd.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/drivers/staging/mei/wd.c b/drivers/staging/mei/wd.c
deleted file mode 100644
index cf4c29d10e7..00000000000
--- a/drivers/staging/mei/wd.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2012, 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 <linux/watchdog.h>
-
-#include "mei_dev.h"
-#include "hw.h"
-#include "interface.h"
-#include "mei.h"
-
-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}
-};
-
-/*
- * AMT Watchdog Device
- */
-#define INTEL_AMT_WATCHDOG_ID "INTCAMT"
-
-/* 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_set_start_timeout(struct mei_device *dev, u16 timeout)
-{
- dev_dbg(&dev->pdev->dev, "timeout=%d.\n", timeout);
- memcpy(dev->wd_data, mei_start_wd_params, MEI_WD_PARAMS_SIZE);
- memcpy(dev->wd_data + MEI_WD_PARAMS_SIZE,
- &timeout, sizeof(u16));
-}
-
-/**
- * host_init_wd - mei initialization wd.
- *
- * @dev: the device structure
- */
-bool mei_wd_host_init(struct mei_device *dev)
-{
- bool ret = false;
-
- mei_cl_init(&dev->wd_cl, dev);
-
- /* look for WD client and connect to it */
- dev->wd_cl.state = MEI_FILE_DISCONNECTED;
- dev->wd_timeout = AMT_WD_DEFAULT_TIMEOUT;
-
- /* 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;
- ret = false;
- goto end;
- } else {
- dev->wd_cl.timer_count = CONNECT_TIMEOUT;
- }
- } else {
- dev_dbg(&dev->pdev->dev, "Failed to find WD client\n");
- ret = false;
- goto end;
- }
-
-end:
- return ret;
-}
-
-/**
- * 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;
-
- return mei_write_message(dev, mei_hdr, dev->wd_data, mei_hdr->length);
-}
-
-/**
- * mei_wd_stop - sends watchdog stop message to fw.
- *
- * @dev: the device structure
- * @preserve: indicate if to keep the timeout value
- *
- * returns 0 if success,
- * -EIO when message send fails
- * -EINVAL when invalid message is to be sent
- */
-int mei_wd_stop(struct mei_device *dev, bool preserve)
-{
- int ret;
- u16 wd_timeout = dev->wd_timeout;
-
- cancel_delayed_work(&dev->timer_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 = true;
-
- 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 = false;
-
- 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 = false;
- } else {
- dev->wd_pending = true;
- }
- dev->wd_stopped = false;
- 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 complete ret=%d.\n", ret);
- ret = 0;
- } else {
- if (!ret)
- ret = -ETIMEDOUT;
- dev_warn(&dev->pdev->dev,
- "stop wd failed to complete ret=%d.\n", ret);
- }
-
- if (preserve)
- dev->wd_timeout = wd_timeout;
-
-out:
- return ret;
-}
-
-/*
- * mei_wd_ops_start - wd start command from the watchdog core.
- *
- * @wd_dev - watchdog device struct
- *
- * returns 0 if success, negative errno code for failure
- */
-static int mei_wd_ops_start(struct watchdog_device *wd_dev)
-{
- int err = -ENODEV;
- struct mei_device *dev;
-
- dev = pci_get_drvdata(mei_device);
- if (!dev)
- return -ENODEV;
-
- mutex_lock(&dev->device_lock);
-
- if (dev->mei_state != MEI_ENABLED) {
- dev_dbg(&dev->pdev->dev, "mei_state != MEI_ENABLED mei_state= %d\n",
- dev->mei_state);
- goto end_unlock;
- }
-
- if (dev->wd_cl.state != MEI_FILE_CONNECTED) {
- dev_dbg(&dev->pdev->dev, "MEI Driver is not connected to Watchdog Client\n");
- goto end_unlock;
- }
-
- mei_wd_set_start_timeout(dev, dev->wd_timeout);
-
- err = 0;
-end_unlock:
- mutex_unlock(&dev->device_lock);
- return err;
-}
-
-/*
- * mei_wd_ops_stop - wd stop command from the watchdog core.
- *
- * @wd_dev - watchdog device struct
- *
- * returns 0 if success, negative errno code for failure
- */
-static int mei_wd_ops_stop(struct watchdog_device *wd_dev)
-{
- struct mei_device *dev;
- dev = pci_get_drvdata(mei_device);
-
- if (!dev)
- return -ENODEV;
-
- mutex_lock(&dev->device_lock);
- mei_wd_stop(dev, false);
- mutex_unlock(&dev->device_lock);
-
- return 0;
-}
-
-/*
- * mei_wd_ops_ping - wd ping command from the watchdog core.
- *
- * @wd_dev - watchdog device struct
- *
- * returns 0 if success, negative errno code for failure
- */
-static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
-{
- int ret = 0;
- struct mei_device *dev;
- dev = pci_get_drvdata(mei_device);
-
- if (!dev)
- return -ENODEV;
-
- mutex_lock(&dev->device_lock);
-
- if (dev->wd_cl.state != MEI_FILE_CONNECTED) {
- dev_dbg(&dev->pdev->dev, "wd is not connected.\n");
- ret = -ENODEV;
- goto end;
- }
-
- /* Check if we can send the ping to HW*/
- if (dev->mei_host_buffer_is_empty &&
- mei_flow_ctrl_creds(dev, &dev->wd_cl) > 0) {
-
- dev->mei_host_buffer_is_empty = false;
- dev_dbg(&dev->pdev->dev, "sending watchdog ping\n");
-
- if (mei_wd_send(dev)) {
- dev_dbg(&dev->pdev->dev, "wd send failed.\n");
- ret = -EIO;
- goto end;
- }
-
- if (mei_flow_ctrl_reduce(dev, &dev->wd_cl)) {
- dev_dbg(&dev->pdev->dev, "mei_flow_ctrl_reduce() failed.\n");
- ret = -EIO;
- goto end;
- }
-
- } else {
- dev->wd_pending = true;
- }
-
-end:
- mutex_unlock(&dev->device_lock);
- return ret;
-}
-
-/*
- * mei_wd_ops_set_timeout - wd set timeout command from the watchdog core.
- *
- * @wd_dev - watchdog device struct
- * @timeout - timeout value to set
- *
- * returns 0 if success, negative errno code for failure
- */
-static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev, unsigned int timeout)
-{
- struct mei_device *dev;
- dev = pci_get_drvdata(mei_device);
-
- if (!dev)
- return -ENODEV;
-
- /* Check Timeout value */
- if (timeout < AMT_WD_MIN_TIMEOUT || timeout > AMT_WD_MAX_TIMEOUT)
- return -EINVAL;
-
- mutex_lock(&dev->device_lock);
-
- dev->wd_timeout = timeout;
- wd_dev->timeout = timeout;
- mei_wd_set_start_timeout(dev, dev->wd_timeout);
-
- mutex_unlock(&dev->device_lock);
-
- return 0;
-}
-
-/*
- * Watchdog Device structs
- */
-static const struct watchdog_ops wd_ops = {
- .owner = THIS_MODULE,
- .start = mei_wd_ops_start,
- .stop = mei_wd_ops_stop,
- .ping = mei_wd_ops_ping,
- .set_timeout = mei_wd_ops_set_timeout,
-};
-static const struct watchdog_info wd_info = {
- .identity = INTEL_AMT_WATCHDOG_ID,
- .options = WDIOF_KEEPALIVEPING,
-};
-
-struct watchdog_device amt_wd_dev = {
- .info = &wd_info,
- .ops = &wd_ops,
- .timeout = AMT_WD_DEFAULT_TIMEOUT,
- .min_timeout = AMT_WD_MIN_TIMEOUT,
- .max_timeout = AMT_WD_MAX_TIMEOUT,
-};
-
-
-void mei_watchdog_register(struct mei_device *dev)
-{
- dev_dbg(&dev->pdev->dev, "dev->wd_timeout =%d.\n", dev->wd_timeout);
-
- dev->wd_due_counter = !!dev->wd_timeout;
-
- if (watchdog_register_device(&amt_wd_dev)) {
- dev_err(&dev->pdev->dev, "unable to register watchdog device.\n");
- dev->wd_interface_reg = false;
- } else {
- dev_dbg(&dev->pdev->dev, "successfully register watchdog interface.\n");
- dev->wd_interface_reg = true;
- }
-}
-
-void mei_watchdog_unregister(struct mei_device *dev)
-{
- if (dev->wd_interface_reg)
- watchdog_unregister_device(&amt_wd_dev);
- dev->wd_interface_reg = false;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 12:36:43 +0000