mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-27 20:07:09 +00:00
mei: fill file pointer in read cb for fixed address client
The read callback created from a flow control request for
a fixed address client have NULL in the file pointer.
Fill the file pointer using a data from a write callback.
This allows us to drop workaround introduced in:
commit eeabfcf5a9 ("mei: connection to fixed address clients from user-space")
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
Greg Kroah-Hartman
parent
603c53e42a
commit
06ee536bcb
@ -1173,11 +1173,12 @@ err:
|
||||
/**
|
||||
* mei_cl_flow_ctrl_creds - checks flow_control credits for cl.
|
||||
*
|
||||
* @cl: private data of the file object
|
||||
* @cl: host client
|
||||
* @fp: the file pointer associated with the pointer
|
||||
*
|
||||
* Return: 1 if mei_flow_ctrl_creds >0, 0 - otherwise.
|
||||
*/
|
||||
static int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
|
||||
static int mei_cl_flow_ctrl_creds(struct mei_cl *cl, const struct file *fp)
|
||||
{
|
||||
int rets;
|
||||
|
||||
@ -1188,7 +1189,7 @@ static int mei_cl_flow_ctrl_creds(struct mei_cl *cl)
|
||||
return 1;
|
||||
|
||||
if (mei_cl_is_fixed_address(cl)) {
|
||||
rets = mei_cl_read_start(cl, mei_cl_mtu(cl), NULL);
|
||||
rets = mei_cl_read_start(cl, mei_cl_mtu(cl), fp);
|
||||
if (rets && rets != -EBUSY)
|
||||
return rets;
|
||||
return 1;
|
||||
@ -1568,7 +1569,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
|
||||
|
||||
first_chunk = cb->buf_idx == 0;
|
||||
|
||||
rets = first_chunk ? mei_cl_flow_ctrl_creds(cl) : 1;
|
||||
rets = first_chunk ? mei_cl_flow_ctrl_creds(cl, cb->fp) : 1;
|
||||
if (rets < 0)
|
||||
return rets;
|
||||
|
||||
@ -1674,7 +1675,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
|
||||
mei_hdr.msg_complete = 0;
|
||||
mei_hdr.internal = cb->internal;
|
||||
|
||||
rets = mei_cl_flow_ctrl_creds(cl);
|
||||
rets = mei_cl_flow_ctrl_creds(cl, cb->fp);
|
||||
if (rets < 0)
|
||||
goto err;
|
||||
|
||||
|
||||
@ -209,11 +209,6 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
|
||||
|
||||
cb = mei_cl_read_cb(cl, file);
|
||||
if (!cb) {
|
||||
if (mei_cl_is_fixed_address(cl) && dev->allow_fixed_address) {
|
||||
cb = mei_cl_read_cb(cl, NULL);
|
||||
if (cb)
|
||||
goto copy_buffer;
|
||||
}
|
||||
rets = 0;
|
||||
goto out;
|
||||
}
|
||||
|
||||
391
drivers/misc/mei/wd.c
Normal file
391
drivers/misc/mei/wd.c
Normal file
@ -0,0 +1,391 @@
|
||||
/*
|
||||
*
|
||||
* 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/sched.h>
|
||||
#include <linux/watchdog.h>
|
||||
|
||||
#include <linux/mei.h>
|
||||
|
||||
#include "mei_dev.h"
|
||||
#include "hbm.h"
|
||||
#include "client.h"
|
||||
|
||||
static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 };
|
||||
static const u8 mei_stop_wd_params[] = { 0x02, 0x02, 0x14, 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);
|
||||
|
||||
static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout)
|
||||
{
|
||||
dev_dbg(dev->dev, "wd: set timeout=%d.\n", timeout);
|
||||
memcpy(dev->wd_data, mei_start_wd_params, MEI_WD_HDR_SIZE);
|
||||
memcpy(dev->wd_data + MEI_WD_HDR_SIZE, &timeout, sizeof(u16));
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_wd_host_init - connect to the watchdog client
|
||||
*
|
||||
* @dev: the device structure
|
||||
* @me_cl: me client
|
||||
*
|
||||
* Return: -ENOTTY if wd client cannot be found
|
||||
* -EIO if write has failed
|
||||
* 0 on success
|
||||
*/
|
||||
int mei_wd_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
|
||||
{
|
||||
struct mei_cl *cl = &dev->wd_cl;
|
||||
int ret;
|
||||
|
||||
mei_cl_init(cl, dev);
|
||||
|
||||
dev->wd_timeout = MEI_WD_DEFAULT_TIMEOUT;
|
||||
dev->wd_state = MEI_WD_IDLE;
|
||||
|
||||
ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID);
|
||||
if (ret < 0) {
|
||||
dev_info(dev->dev, "wd: failed link client\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = mei_cl_connect(cl, me_cl, NULL);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "wd: failed to connect = %d\n", ret);
|
||||
mei_cl_unlink(cl);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = mei_watchdog_register(dev);
|
||||
if (ret) {
|
||||
mei_cl_disconnect(cl);
|
||||
mei_cl_unlink(cl);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_wd_send - sends watch dog message to fw.
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* Return: 0 if success,
|
||||
* -EIO when message send fails
|
||||
* -EINVAL when invalid message is to be sent
|
||||
* -ENODEV on flow control failure
|
||||
*/
|
||||
int mei_wd_send(struct mei_device *dev)
|
||||
{
|
||||
struct mei_cl *cl = &dev->wd_cl;
|
||||
struct mei_msg_hdr hdr;
|
||||
int ret;
|
||||
|
||||
hdr.host_addr = cl->host_client_id;
|
||||
hdr.me_addr = mei_cl_me_id(cl);
|
||||
hdr.msg_complete = 1;
|
||||
hdr.reserved = 0;
|
||||
hdr.internal = 0;
|
||||
|
||||
if (!memcmp(dev->wd_data, mei_start_wd_params, MEI_WD_HDR_SIZE))
|
||||
hdr.length = MEI_WD_START_MSG_SIZE;
|
||||
else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE))
|
||||
hdr.length = MEI_WD_STOP_MSG_SIZE;
|
||||
else {
|
||||
dev_err(dev->dev, "wd: invalid message is to be sent, aborting\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = mei_write_message(dev, &hdr, dev->wd_data);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "wd: write message failed\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = mei_cl_flow_ctrl_reduce(cl);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "wd: flow_ctrl_reduce failed.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_wd_stop - sends watchdog stop message to fw.
|
||||
*
|
||||
* @dev: the device structure
|
||||
*
|
||||
* Return: 0 if success
|
||||
* on error:
|
||||
* -EIO when message send fails
|
||||
* -EINVAL when invalid message is to be sent
|
||||
* -ETIME on message timeout
|
||||
*/
|
||||
int mei_wd_stop(struct mei_device *dev)
|
||||
{
|
||||
struct mei_cl *cl = &dev->wd_cl;
|
||||
int ret;
|
||||
|
||||
if (!mei_cl_is_connected(cl) ||
|
||||
dev->wd_state != MEI_WD_RUNNING)
|
||||
return 0;
|
||||
|
||||
memcpy(dev->wd_data, mei_stop_wd_params, MEI_WD_STOP_MSG_SIZE);
|
||||
|
||||
dev->wd_state = MEI_WD_STOPPING;
|
||||
|
||||
ret = mei_cl_flow_ctrl_creds(cl, NULL);
|
||||
if (ret < 0)
|
||||
goto err;
|
||||
|
||||
if (ret && mei_hbuf_acquire(dev)) {
|
||||
ret = mei_wd_send(dev);
|
||||
if (ret)
|
||||
goto err;
|
||||
dev->wd_pending = false;
|
||||
} else {
|
||||
dev->wd_pending = true;
|
||||
}
|
||||
|
||||
mutex_unlock(&dev->device_lock);
|
||||
|
||||
ret = wait_event_timeout(dev->wait_stop_wd,
|
||||
dev->wd_state == MEI_WD_IDLE,
|
||||
msecs_to_jiffies(MEI_WD_STOP_TIMEOUT));
|
||||
mutex_lock(&dev->device_lock);
|
||||
if (dev->wd_state != MEI_WD_IDLE) {
|
||||
/* timeout */
|
||||
ret = -ETIME;
|
||||
dev_warn(dev->dev, "wd: stop failed to complete ret=%d\n", ret);
|
||||
goto err;
|
||||
}
|
||||
dev_dbg(dev->dev, "wd: stop completed after %u msec\n",
|
||||
MEI_WD_STOP_TIMEOUT - jiffies_to_msecs(ret));
|
||||
return 0;
|
||||
err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_wd_ops_start - wd start command from the watchdog core.
|
||||
*
|
||||
* @wd_dev: watchdog device struct
|
||||
*
|
||||
* Return: 0 if success, negative errno code for failure
|
||||
*/
|
||||
static int mei_wd_ops_start(struct watchdog_device *wd_dev)
|
||||
{
|
||||
struct mei_device *dev;
|
||||
struct mei_cl *cl;
|
||||
int err = -ENODEV;
|
||||
|
||||
dev = watchdog_get_drvdata(wd_dev);
|
||||
if (!dev)
|
||||
return -ENODEV;
|
||||
|
||||
cl = &dev->wd_cl;
|
||||
|
||||
mutex_lock(&dev->device_lock);
|
||||
|
||||
if (dev->dev_state != MEI_DEV_ENABLED) {
|
||||
dev_dbg(dev->dev, "wd: dev_state != MEI_DEV_ENABLED dev_state = %s\n",
|
||||
mei_dev_state_str(dev->dev_state));
|
||||
goto end_unlock;
|
||||
}
|
||||
|
||||
if (!mei_cl_is_connected(cl)) {
|
||||
cl_dbg(dev, cl, "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
|
||||
*
|
||||
* Return: 0 if success, negative errno code for failure
|
||||
*/
|
||||
static int mei_wd_ops_stop(struct watchdog_device *wd_dev)
|
||||
{
|
||||
struct mei_device *dev;
|
||||
|
||||
dev = watchdog_get_drvdata(wd_dev);
|
||||
if (!dev)
|
||||
return -ENODEV;
|
||||
|
||||
mutex_lock(&dev->device_lock);
|
||||
mei_wd_stop(dev);
|
||||
mutex_unlock(&dev->device_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mei_wd_ops_ping - wd ping command from the watchdog core.
|
||||
*
|
||||
* @wd_dev: watchdog device struct
|
||||
*
|
||||
* Return: 0 if success, negative errno code for failure
|
||||
*/
|
||||
static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
|
||||
{
|
||||
struct mei_device *dev;
|
||||
struct mei_cl *cl;
|
||||
int ret;
|
||||
|
||||
dev = watchdog_get_drvdata(wd_dev);
|
||||
if (!dev)
|
||||
return -ENODEV;
|
||||
|
||||
cl = &dev->wd_cl;
|
||||
|
||||
mutex_lock(&dev->device_lock);
|
||||
|
||||
if (!mei_cl_is_connected(cl)) {
|
||||
cl_err(dev, cl, "wd: not connected.\n");
|
||||
ret = -ENODEV;
|
||||
goto end;
|
||||
}
|
||||
|
||||
dev->wd_state = MEI_WD_RUNNING;
|
||||
|
||||
ret = mei_cl_flow_ctrl_creds(cl, NULL);
|
||||
if (ret < 0)
|
||||
goto end;
|
||||
|
||||
/* Check if we can send the ping to HW*/
|
||||
if (ret && mei_hbuf_acquire(dev)) {
|
||||
dev_dbg(dev->dev, "wd: sending ping\n");
|
||||
|
||||
ret = mei_wd_send(dev);
|
||||
if (ret)
|
||||
goto end;
|
||||
dev->wd_pending = false;
|
||||
} 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
|
||||
*
|
||||
* Return: 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 = watchdog_get_drvdata(wd_dev);
|
||||
if (!dev)
|
||||
return -ENODEV;
|
||||
|
||||
/* Check Timeout value */
|
||||
if (timeout < MEI_WD_MIN_TIMEOUT || timeout > MEI_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 |
|
||||
WDIOF_SETTIMEOUT |
|
||||
WDIOF_ALARMONLY,
|
||||
};
|
||||
|
||||
static struct watchdog_device amt_wd_dev = {
|
||||
.info = &wd_info,
|
||||
.ops = &wd_ops,
|
||||
.timeout = MEI_WD_DEFAULT_TIMEOUT,
|
||||
.min_timeout = MEI_WD_MIN_TIMEOUT,
|
||||
.max_timeout = MEI_WD_MAX_TIMEOUT,
|
||||
};
|
||||
|
||||
|
||||
int mei_watchdog_register(struct mei_device *dev)
|
||||
{
|
||||
|
||||
int ret;
|
||||
|
||||
amt_wd_dev.parent = dev->dev;
|
||||
/* unlock to perserve correct locking order */
|
||||
mutex_unlock(&dev->device_lock);
|
||||
ret = watchdog_register_device(&amt_wd_dev);
|
||||
mutex_lock(&dev->device_lock);
|
||||
if (ret) {
|
||||
dev_err(dev->dev, "wd: unable to register watchdog device = %d.\n",
|
||||
ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
dev_dbg(dev->dev, "wd: successfully register watchdog interface.\n");
|
||||
watchdog_set_drvdata(&amt_wd_dev, dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void mei_watchdog_unregister(struct mei_device *dev)
|
||||
{
|
||||
if (watchdog_get_drvdata(&amt_wd_dev) == NULL)
|
||||
return;
|
||||
|
||||
watchdog_set_drvdata(&amt_wd_dev, NULL);
|
||||
watchdog_unregister_device(&amt_wd_dev);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user