aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/misc/mei/amthif.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/misc/mei/amthif.c')
-rw-r--r--drivers/misc/mei/amthif.c167
1 files changed, 75 insertions, 92 deletions
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 0d6234db00fa..6cdce8477f57 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -20,7 +20,6 @@
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/aio.h>
-#include <linux/pci.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/list.h>
@@ -29,6 +28,7 @@
#include <linux/uuid.h>
#include <linux/jiffies.h>
#include <linux/uaccess.h>
+#include <linux/slab.h>
#include <linux/mei.h>
@@ -64,31 +64,32 @@ void mei_amthif_reset_params(struct mei_device *dev)
*
* @dev: the device structure
*
+ * Return: 0 on success, <0 on failure.
*/
int mei_amthif_host_init(struct mei_device *dev)
{
struct mei_cl *cl = &dev->iamthif_cl;
+ struct mei_me_client *me_cl;
unsigned char *msg_buf;
- int ret, i;
+ int ret;
dev->iamthif_state = MEI_IAMTHIF_IDLE;
mei_cl_init(cl, dev);
- i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
- if (i < 0) {
- dev_info(&dev->pdev->dev,
- "amthif: failed to find the client %d\n", i);
+ me_cl = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
+ if (!me_cl) {
+ dev_info(dev->dev, "amthif: failed to find the client");
return -ENOTTY;
}
- 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;
/* Assign iamthif_mtu to the value received from ME */
- dev->iamthif_mtu = dev->me_clients[i].props.max_msg_length;
- dev_dbg(&dev->pdev->dev, "IAMTHIF_MTU = %d\n",
- dev->me_clients[i].props.max_msg_length);
+ dev->iamthif_mtu = me_cl->props.max_msg_length;
+ dev_dbg(dev->dev, "IAMTHIF_MTU = %d\n", dev->iamthif_mtu);
kfree(dev->iamthif_msg_buf);
dev->iamthif_msg_buf = NULL;
@@ -96,17 +97,15 @@ int mei_amthif_host_init(struct mei_device *dev)
/* allocate storage for ME message buffer */
msg_buf = kcalloc(dev->iamthif_mtu,
sizeof(unsigned char), GFP_KERNEL);
- if (!msg_buf) {
- dev_err(&dev->pdev->dev, "amthif: memory allocation for ME message buffer failed.\n");
+ if (!msg_buf)
return -ENOMEM;
- }
dev->iamthif_msg_buf = msg_buf;
ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID);
if (ret < 0) {
- dev_err(&dev->pdev->dev,
+ dev_err(dev->dev,
"amthif: failed link client %d\n", ret);
return ret;
}
@@ -124,18 +123,16 @@ int mei_amthif_host_init(struct mei_device *dev)
* @dev: the device structure
* @file: pointer to file object
*
- * returns returned a list entry on success, NULL on failure.
+ * Return: returned a list entry on success, NULL on failure.
*/
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
struct file *file)
{
struct mei_cl_cb *cb;
- list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list) {
- if (cb->cl && cb->cl == &dev->iamthif_cl &&
- cb->file_object == file)
+ list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list)
+ if (cb->file_object == file)
return cb;
- }
return NULL;
}
@@ -144,15 +141,14 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
* mei_amthif_read - read data from AMTHIF client
*
* @dev: the device structure
- * @if_num: minor number
* @file: pointer to file object
- * @*ubuf: pointer to user data in user space
+ * @ubuf: pointer to user data in user space
* @length: data length to read
* @offset: data read offset
*
* Locking: called under "dev->device_lock" lock
*
- * returns
+ * Return:
* returned data length on success,
* zero if no data to read,
* negative on failure.
@@ -160,25 +156,19 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
int mei_amthif_read(struct mei_device *dev, struct file *file,
char __user *ubuf, size_t length, loff_t *offset)
{
- int rets;
- int wait_ret;
- struct mei_cl_cb *cb = NULL;
struct mei_cl *cl = file->private_data;
+ struct mei_cl_cb *cb;
unsigned long timeout;
- int i;
+ int rets;
+ int wait_ret;
/* Only possible if we are in timeout */
- if (!cl || cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "bad file ext.\n");
+ if (!cl) {
+ dev_err(dev->dev, "bad file ext.\n");
return -ETIME;
}
- i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
- if (i < 0) {
- dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
- return -ENOTTY;
- }
- dev_dbg(&dev->pdev->dev, "checking amthif data\n");
+ dev_dbg(dev->dev, "checking amthif data\n");
cb = mei_amthif_find_read_list_entry(dev, file);
/* Check for if we can block or not*/
@@ -186,7 +176,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
return -EAGAIN;
- dev_dbg(&dev->pdev->dev, "waiting for amthif data\n");
+ dev_dbg(dev->dev, "waiting for amthif data\n");
while (cb == NULL) {
/* unlock the Mutex */
mutex_unlock(&dev->device_lock);
@@ -200,21 +190,21 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
if (wait_ret)
return -ERESTARTSYS;
- dev_dbg(&dev->pdev->dev, "woke up from sleep\n");
+ dev_dbg(dev->dev, "woke up from sleep\n");
}
- dev_dbg(&dev->pdev->dev, "Got amthif data\n");
+ dev_dbg(dev->dev, "Got amthif data\n");
dev->iamthif_timer = 0;
if (cb) {
timeout = cb->read_time +
mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
- dev_dbg(&dev->pdev->dev, "amthif timeout = %lud\n",
+ dev_dbg(dev->dev, "amthif timeout = %lud\n",
timeout);
if (time_after(jiffies, timeout)) {
- dev_dbg(&dev->pdev->dev, "amthif Time out\n");
+ dev_dbg(dev->dev, "amthif Time out\n");
/* 15 sec for the message has expired */
list_del(&cb->list);
rets = -ETIME;
@@ -234,16 +224,16 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
* remove message from deletion list
*/
- dev_dbg(&dev->pdev->dev, "amthif cb->response_buffer size - %d\n",
+ dev_dbg(dev->dev, "amthif cb->response_buffer size - %d\n",
cb->response_buffer.size);
- dev_dbg(&dev->pdev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx);
+ dev_dbg(dev->dev, "amthif cb->buf_idx - %lu\n", cb->buf_idx);
/* length is being truncated to PAGE_SIZE, however,
* the buf_idx may point beyond */
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;
} else {
rets = length;
@@ -253,7 +243,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
}
}
free:
- dev_dbg(&dev->pdev->dev, "free amthif cb memory.\n");
+ dev_dbg(dev->dev, "free amthif cb memory.\n");
*offset = 0;
mei_io_cb_free(cb);
out:
@@ -266,7 +256,7 @@ out:
* @dev: the device structure
* @cb: mei call back struct
*
- * returns 0 on success, <0 on failure.
+ * Return: 0 on success, <0 on failure.
*
*/
static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
@@ -277,7 +267,7 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
if (!dev || !cb)
return -ENODEV;
- dev_dbg(&dev->pdev->dev, "write data to amthif client.\n");
+ dev_dbg(dev->dev, "write data to amthif client.\n");
dev->iamthif_state = MEI_IAMTHIF_WRITING;
dev->iamthif_current_cb = cb;
@@ -316,12 +306,12 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
return -EIO;
dev->iamthif_flow_control_pending = true;
dev->iamthif_state = MEI_IAMTHIF_FLOW_CONTROL;
- dev_dbg(&dev->pdev->dev, "add amthif cb to write waiting list\n");
+ dev_dbg(dev->dev, "add amthif cb to write waiting list\n");
dev->iamthif_current_cb = cb;
dev->iamthif_file_object = cb->file_object;
list_add_tail(&cb->list, &dev->write_waiting_list.list);
} else {
- dev_dbg(&dev->pdev->dev, "message does not complete, so add amthif cb to write list.\n");
+ dev_dbg(dev->dev, "message does not complete, so add amthif cb to write list.\n");
list_add_tail(&cb->list, &dev->write_list.list);
}
} else {
@@ -336,7 +326,7 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
* @dev: the device structure
* @cb: mei call back struct
*
- * returns 0 on success, <0 on failure.
+ * Return: 0 on success, <0 on failure.
*
*/
int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
@@ -354,25 +344,23 @@ int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
if (!list_empty(&dev->amthif_cmd_list.list) ||
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
- dev_dbg(&dev->pdev->dev,
+ dev_dbg(dev->dev,
"amthif state = %d\n", dev->iamthif_state);
- dev_dbg(&dev->pdev->dev, "AMTHIF: add cb to the wait list\n");
+ dev_dbg(dev->dev, "AMTHIF: add cb to the wait list\n");
list_add_tail(&cb->list, &dev->amthif_cmd_list.list);
return 0;
}
return mei_amthif_send_cmd(dev, cb);
}
/**
- * mei_amthif_run_next_cmd
+ * mei_amthif_run_next_cmd - send next amt command from queue
*
* @dev: the device structure
- *
- * returns 0 on success, <0 on failure.
*/
void mei_amthif_run_next_cmd(struct mei_device *dev)
{
- struct mei_cl_cb *pos = NULL;
- struct mei_cl_cb *next = NULL;
+ struct mei_cl_cb *cb;
+ struct mei_cl_cb *next;
int status;
if (!dev)
@@ -386,21 +374,17 @@ void mei_amthif_run_next_cmd(struct mei_device *dev)
dev->iamthif_timer = 0;
dev->iamthif_file_object = NULL;
- dev_dbg(&dev->pdev->dev, "complete amthif cmd_list cb.\n");
-
- list_for_each_entry_safe(pos, next, &dev->amthif_cmd_list.list, list) {
- list_del(&pos->list);
+ dev_dbg(dev->dev, "complete amthif cmd_list cb.\n");
- if (pos->cl && pos->cl == &dev->iamthif_cl) {
- status = mei_amthif_send_cmd(dev, pos);
- if (status) {
- dev_dbg(&dev->pdev->dev,
- "amthif write failed status = %d\n",
+ list_for_each_entry_safe(cb, next, &dev->amthif_cmd_list.list, list) {
+ list_del(&cb->list);
+ if (!cb->cl)
+ continue;
+ status = mei_amthif_send_cmd(dev, cb);
+ if (status)
+ dev_warn(dev->dev, "amthif write failed status = %d\n",
status);
- return;
- }
- break;
- }
+ break;
}
}
@@ -421,7 +405,7 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
dev->iamthif_file_object == file) {
mask |= (POLLIN | POLLRDNORM);
- dev_dbg(&dev->pdev->dev, "run next amthif cb\n");
+ dev_dbg(dev->dev, "run next amthif cb\n");
mei_amthif_run_next_cmd(dev);
}
mutex_unlock(&dev->device_lock);
@@ -434,12 +418,11 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
/**
* mei_amthif_irq_write - write iamthif command in irq thread context.
*
- * @dev: the device structure.
- * @cb_pos: callback block.
* @cl: private data of the file object.
+ * @cb: callback block.
* @cmpl_list: complete list.
*
- * returns 0, OK; otherwise, error.
+ * Return: 0, OK; otherwise, error.
*/
int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
struct mei_cl_cb *cmpl_list)
@@ -481,7 +464,7 @@ int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
return 0;
}
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
+ dev_dbg(dev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
rets = mei_write_message(dev, &mei_hdr,
dev->iamthif_msg_buf + dev->iamthif_msg_buf_index);
@@ -514,14 +497,14 @@ int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
}
/**
- * mei_amthif_irq_read_message - read routine after ISR to
+ * mei_amthif_irq_read_msg - read routine after ISR to
* handle the read amthif message
*
* @dev: the device structure
* @mei_hdr: header of amthif message
* @complete_list: An instance of our list structure
*
- * returns 0 on success, <0 on failure.
+ * Return: 0 on success, <0 on failure.
*/
int mei_amthif_irq_read_msg(struct mei_device *dev,
struct mei_msg_hdr *mei_hdr,
@@ -543,10 +526,10 @@ int mei_amthif_irq_read_msg(struct mei_device *dev,
if (!mei_hdr->msg_complete)
return 0;
- dev_dbg(&dev->pdev->dev, "amthif_message_buffer_index =%d\n",
+ dev_dbg(dev->dev, "amthif_message_buffer_index =%d\n",
mei_hdr->length);
- dev_dbg(&dev->pdev->dev, "completed amthif read.\n ");
+ dev_dbg(dev->dev, "completed amthif read.\n ");
if (!dev->iamthif_current_cb)
return -ENODEV;
@@ -559,10 +542,10 @@ int mei_amthif_irq_read_msg(struct mei_device *dev,
dev->iamthif_stall_timer = 0;
cb->buf_idx = dev->iamthif_msg_buf_index;
cb->read_time = jiffies;
- if (dev->iamthif_ioctl && cb->cl == &dev->iamthif_cl) {
+ if (dev->iamthif_ioctl) {
/* found the iamthif cb */
- dev_dbg(&dev->pdev->dev, "complete the amthif read cb.\n ");
- dev_dbg(&dev->pdev->dev, "add the amthif read cb to complete.\n ");
+ dev_dbg(dev->dev, "complete the amthif read cb.\n ");
+ dev_dbg(dev->dev, "add the amthif read cb to complete.\n ");
list_add_tail(&cb->list, &complete_list->list);
}
return 0;
@@ -574,7 +557,7 @@ int mei_amthif_irq_read_msg(struct mei_device *dev,
* @dev: the device structure.
* @slots: free slots.
*
- * returns 0, OK; otherwise, error.
+ * Return: 0, OK; otherwise, error.
*/
int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
{
@@ -586,11 +569,11 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
*slots -= msg_slots;
if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) {
- dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
+ dev_dbg(dev->dev, "iamthif flow control failed\n");
return -EIO;
}
- dev_dbg(&dev->pdev->dev, "iamthif flow control success\n");
+ dev_dbg(dev->dev, "iamthif flow control success\n");
dev->iamthif_state = MEI_IAMTHIF_READING;
dev->iamthif_flow_control_pending = false;
dev->iamthif_msg_buf_index = 0;
@@ -604,7 +587,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
* mei_amthif_complete - complete amthif callback.
*
* @dev: the device structure.
- * @cb_pos: callback block.
+ * @cb: callback block.
*/
void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
{
@@ -615,15 +598,15 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
dev->iamthif_msg_buf,
dev->iamthif_msg_buf_index);
list_add_tail(&cb->list, &dev->amthif_rd_complete_list.list);
- dev_dbg(&dev->pdev->dev, "amthif read completed\n");
+ dev_dbg(dev->dev, "amthif read completed\n");
dev->iamthif_timer = jiffies;
- dev_dbg(&dev->pdev->dev, "dev->iamthif_timer = %ld\n",
+ dev_dbg(dev->dev, "dev->iamthif_timer = %ld\n",
dev->iamthif_timer);
} else {
mei_amthif_run_next_cmd(dev);
}
- dev_dbg(&dev->pdev->dev, "completing amthif call back.\n");
+ dev_dbg(dev->dev, "completing amthif call back.\n");
wake_up_interruptible(&dev->iamthif_cl.wait);
}
@@ -638,7 +621,7 @@ void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb)
* mei_clear_list is called to clear resources associated with file
* when application calls close function or Ctrl-C was pressed
*
- * returns true if callback removed from the list, false otherwise
+ * Return: true if callback removed from the list, false otherwise
*/
static bool mei_clear_list(struct mei_device *dev,
const struct file *file, struct list_head *mei_cb_list)
@@ -678,7 +661,7 @@ static bool mei_clear_list(struct mei_device *dev,
* mei_clear_lists is called to clear resources associated with file
* when application calls close function or Ctrl-C was pressed
*
- * returns true if callback removed from the list, false otherwise
+ * Return: true if callback removed from the list, false otherwise
*/
static bool mei_clear_lists(struct mei_device *dev, struct file *file)
{
@@ -719,7 +702,7 @@ static bool mei_clear_lists(struct mei_device *dev, struct file *file)
* @dev: device structure
* @file: pointer to file structure
*
-* returns 0 on success, <0 on error
+* Return: 0 on success, <0 on error
*/
int mei_amthif_release(struct mei_device *dev, struct file *file)
{
@@ -729,11 +712,11 @@ int mei_amthif_release(struct mei_device *dev, struct file *file)
if (dev->iamthif_file_object == file &&
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
- dev_dbg(&dev->pdev->dev, "amthif canceled iamthif state %d\n",
+ dev_dbg(dev->dev, "amthif canceled iamthif state %d\n",
dev->iamthif_state);
dev->iamthif_canceled = true;
if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE) {
- dev_dbg(&dev->pdev->dev, "run next amthif iamthif cb\n");
+ dev_dbg(dev->dev, "run next amthif iamthif cb\n");
mei_amthif_run_next_cmd(dev);
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.