aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/misc/mei/main.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/misc/mei/main.c')
-rw-r--r--drivers/misc/mei/main.c143
1 files changed, 66 insertions, 77 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 401a3d526cd0..beedc91f03a6 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -17,12 +17,12 @@
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/device.h>
+#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/aio.h>
-#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/ioctl.h>
@@ -44,7 +44,7 @@
* @inode: pointer to inode structure
* @file: pointer to file structure
*
- * returns 0 on success, <0 on error
+ * Return: 0 on success, <0 on error
*/
static int mei_open(struct inode *inode, struct file *file)
{
@@ -63,7 +63,7 @@ static int mei_open(struct inode *inode, struct file *file)
err = -ENODEV;
if (dev->dev_state != MEI_DEV_ENABLED) {
- dev_dbg(&dev->pdev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
+ dev_dbg(dev->dev, "dev_state != MEI_ENABLED dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
goto err_unlock;
}
@@ -96,7 +96,7 @@ err_unlock:
* @inode: pointer to inode structure
* @file: pointer to file structure
*
- * returns 0 on success, <0 on error
+ * Return: 0 on success, <0 on error
*/
static int mei_release(struct inode *inode, struct file *file)
{
@@ -157,7 +157,7 @@ out:
* @length: buffer length
* @offset: data offset in buffer
*
- * returns >=0 data length on success , <0 on error
+ * Return: >=0 data length on success , <0 on error
*/
static ssize_t mei_read(struct file *file, char __user *ubuf,
size_t length, loff_t *offset)
@@ -211,7 +211,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
err = mei_cl_read_start(cl, length);
if (err && err != -EBUSY) {
- dev_dbg(&dev->pdev->dev,
+ dev_dbg(dev->dev,
"mei start read failure with status = %d\n", err);
rets = err;
goto out;
@@ -254,7 +254,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
}
/* now copy the data to user space */
copy_buffer:
- dev_dbg(&dev->pdev->dev, "buf.size = %d buf.idx= %ld\n",
+ dev_dbg(dev->dev, "buf.size = %d buf.idx= %ld\n",
cb->response_buffer.size, cb->buf_idx);
if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) {
rets = -EMSGSIZE;
@@ -266,7 +266,7 @@ copy_buffer:
length = min_t(size_t, length, cb->buf_idx - *offset);
if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
- dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
+ dev_dbg(dev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
goto free;
}
@@ -285,7 +285,7 @@ free:
cl->reading_state = MEI_IDLE;
cl->read_cb = NULL;
out:
- dev_dbg(&dev->pdev->dev, "end mei read rets= %d\n", rets);
+ dev_dbg(dev->dev, "end mei read rets= %d\n", rets);
mutex_unlock(&dev->device_lock);
return rets;
}
@@ -297,17 +297,17 @@ out:
* @length: buffer length
* @offset: data offset in buffer
*
- * returns >=0 data length on success , <0 on error
+ * Return: >=0 data length on success , <0 on error
*/
static ssize_t mei_write(struct file *file, const char __user *ubuf,
size_t length, loff_t *offset)
{
struct mei_cl *cl = file->private_data;
+ struct mei_me_client *me_cl;
struct mei_cl_cb *write_cb = NULL;
struct mei_device *dev;
unsigned long timeout = 0;
int rets;
- int id;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -321,8 +321,8 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
}
- id = mei_me_cl_by_id(dev, cl->me_client_id);
- if (id < 0) {
+ me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id);
+ if (!me_cl) {
rets = -ENOTTY;
goto out;
}
@@ -332,13 +332,13 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
}
- if (length > dev->me_clients[id].props.max_msg_length) {
+ if (length > me_cl->props.max_msg_length) {
rets = -EFBIG;
goto out;
}
if (cl->state != MEI_FILE_CONNECTED) {
- dev_err(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d",
+ dev_err(dev->dev, "host client = %d, is not connected to ME client = %d",
cl->host_client_id, cl->me_client_id);
rets = -ENODEV;
goto out;
@@ -377,7 +377,6 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
write_cb = mei_io_cb_init(cl, file);
if (!write_cb) {
- dev_err(&dev->pdev->dev, "write cb allocation failed\n");
rets = -ENOMEM;
goto out;
}
@@ -387,7 +386,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
rets = copy_from_user(write_cb->request_buffer.data, ubuf, length);
if (rets) {
- dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
+ dev_dbg(dev->dev, "failed to copy data from userland\n");
rets = -EFAULT;
goto out;
}
@@ -396,7 +395,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
rets = mei_amthif_write(dev, write_cb);
if (rets) {
- dev_err(&dev->pdev->dev,
+ dev_err(dev->dev,
"amthif write failed with status = %d\n", rets);
goto out;
}
@@ -415,27 +414,23 @@ out:
/**
* mei_ioctl_connect_client - the connect to fw client IOCTL function
*
- * @dev: the device structure
- * @data: IOCTL connect data, input and output parameters
* @file: private data of the file object
+ * @data: IOCTL connect data, input and output parameters
*
* Locking: called under "dev->device_lock" lock
*
- * returns 0 on success, <0 on failure.
+ * Return: 0 on success, <0 on failure.
*/
static int mei_ioctl_connect_client(struct file *file,
struct mei_connect_client_data *data)
{
struct mei_device *dev;
struct mei_client *client;
+ struct mei_me_client *me_cl;
struct mei_cl *cl;
- int i;
int rets;
cl = file->private_data;
- if (WARN_ON(!cl || !cl->dev))
- return -ENODEV;
-
dev = cl->dev;
if (dev->dev_state != MEI_DEV_ENABLED) {
@@ -450,28 +445,29 @@ static int mei_ioctl_connect_client(struct file *file,
}
/* find ME client we're trying to connect to */
- i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
- if (i < 0 || dev->me_clients[i].props.fixed_address) {
- dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n",
+ me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
+ if (!me_cl || me_cl->props.fixed_address) {
+ dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
- cl->me_client_id = dev->me_clients[i].client_id;
+ cl->me_client_id = me_cl->client_id;
+ cl->cl_uuid = me_cl->props.protocol_name;
- dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
+ dev_dbg(dev->dev, "Connect to FW Client ID = %d\n",
cl->me_client_id);
- dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
- dev->me_clients[i].props.protocol_version);
- dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
- dev->me_clients[i].props.max_msg_length);
+ dev_dbg(dev->dev, "FW Client - Protocol Version = %d\n",
+ me_cl->props.protocol_version);
+ dev_dbg(dev->dev, "FW Client - Max Msg Len = %d\n",
+ me_cl->props.max_msg_length);
/* if we're connecting to amthif client then we will use the
* existing connection
*/
if (uuid_le_cmp(data->in_client_uuid, mei_amthif_guid) == 0) {
- dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
+ dev_dbg(dev->dev, "FW Client is amthi\n");
if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
rets = -ENODEV;
goto end;
@@ -484,10 +480,8 @@ static int mei_ioctl_connect_client(struct file *file,
file->private_data = &dev->iamthif_cl;
client = &data->out_client_properties;
- client->max_msg_length =
- dev->me_clients[i].props.max_msg_length;
- client->protocol_version =
- dev->me_clients[i].props.protocol_version;
+ client->max_msg_length = me_cl->props.max_msg_length;
+ client->protocol_version = me_cl->props.protocol_version;
rets = dev->iamthif_cl.status;
goto end;
@@ -496,9 +490,9 @@ static int mei_ioctl_connect_client(struct file *file,
/* prepare the output buffer */
client = &data->out_client_properties;
- client->max_msg_length = dev->me_clients[i].props.max_msg_length;
- client->protocol_version = dev->me_clients[i].props.protocol_version;
- dev_dbg(&dev->pdev->dev, "Can connect?\n");
+ client->max_msg_length = me_cl->props.max_msg_length;
+ client->protocol_version = me_cl->props.protocol_version;
+ dev_dbg(dev->dev, "Can connect?\n");
rets = mei_cl_connect(cl, file);
@@ -507,7 +501,6 @@ end:
return rets;
}
-
/**
* mei_ioctl - the IOCTL function
*
@@ -515,24 +508,22 @@ end:
* @cmd: ioctl command
* @data: pointer to mei message structure
*
- * returns 0 on success , <0 on error
+ * Return: 0 on success , <0 on error
*/
static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
{
struct mei_device *dev;
struct mei_cl *cl = file->private_data;
- struct mei_connect_client_data *connect_data = NULL;
+ struct mei_connect_client_data connect_data;
int rets;
- if (cmd != IOCTL_MEI_CONNECT_CLIENT)
- return -EINVAL;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
- dev_dbg(&dev->pdev->dev, "IOCTL cmd = 0x%x", cmd);
+ dev_dbg(dev->dev, "IOCTL cmd = 0x%x", cmd);
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
@@ -540,38 +531,36 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
goto out;
}
- dev_dbg(&dev->pdev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n");
-
- connect_data = kzalloc(sizeof(struct mei_connect_client_data),
- GFP_KERNEL);
- if (!connect_data) {
- rets = -ENOMEM;
- goto out;
- }
- dev_dbg(&dev->pdev->dev, "copy connect data from user\n");
- if (copy_from_user(connect_data, (char __user *)data,
+ switch (cmd) {
+ case IOCTL_MEI_CONNECT_CLIENT:
+ dev_dbg(dev->dev, ": IOCTL_MEI_CONNECT_CLIENT.\n");
+ if (copy_from_user(&connect_data, (char __user *)data,
sizeof(struct mei_connect_client_data))) {
- dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n");
- rets = -EFAULT;
- goto out;
- }
-
- rets = mei_ioctl_connect_client(file, connect_data);
+ dev_dbg(dev->dev, "failed to copy data from userland\n");
+ rets = -EFAULT;
+ goto out;
+ }
- /* if all is ok, copying the data back to user. */
- if (rets)
- goto out;
+ rets = mei_ioctl_connect_client(file, &connect_data);
+ if (rets)
+ goto out;
- dev_dbg(&dev->pdev->dev, "copy connect data to user\n");
- if (copy_to_user((char __user *)data, connect_data,
+ /* if all is ok, copying the data back to user. */
+ if (copy_to_user((char __user *)data, &connect_data,
sizeof(struct mei_connect_client_data))) {
- dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
- rets = -EFAULT;
- goto out;
+ dev_dbg(dev->dev, "failed to copy data to userland\n");
+ rets = -EFAULT;
+ goto out;
+ }
+
+ break;
+
+ default:
+ dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd);
+ rets = -ENOIOCTLCMD;
}
out:
- kfree(connect_data);
mutex_unlock(&dev->device_lock);
return rets;
}
@@ -583,7 +572,7 @@ out:
* @cmd: ioctl command
* @data: pointer to mei message structure
*
- * returns 0 on success , <0 on error
+ * Return: 0 on success , <0 on error
*/
#ifdef CONFIG_COMPAT
static long mei_compat_ioctl(struct file *file,
@@ -600,7 +589,7 @@ static long mei_compat_ioctl(struct file *file,
* @file: pointer to file structure
* @wait: pointer to poll_table structure
*
- * returns poll mask
+ * Return: poll mask
*/
static unsigned int mei_poll(struct file *file, poll_table *wait)
{
@@ -670,7 +659,7 @@ static DEFINE_IDR(mei_idr);
*
* @dev: device pointer
*
- * returns allocated minor, or -ENOSPC if no free minor left
+ * Return: allocated minor, or -ENOSPC if no free minor left
*/
static int mei_minor_get(struct mei_device *dev)
{
@@ -681,7 +670,7 @@ static int mei_minor_get(struct mei_device *dev)
if (ret >= 0)
dev->minor = ret;
else if (ret == -ENOSPC)
- dev_err(&dev->pdev->dev, "too many mei devices\n");
+ dev_err(dev->dev, "too many mei devices\n");
mutex_unlock(&mei_minor_lock);
return ret;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.