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path: root/drivers/misc/mei/main.c
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Diffstat (limited to 'drivers/misc/mei/main.c')
-rw-r--r--drivers/misc/mei/main.c462
1 files changed, 145 insertions, 317 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index e8b0858132c1..43fb52ff98ad 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -90,93 +90,6 @@ static DEFINE_MUTEX(mei_mutex);
/**
- * mei_clear_list - removes all callbacks associated with file
- * from mei_cb_list
- *
- * @dev: device structure.
- * @file: file structure
- * @mei_cb_list: callbacks list
- *
- * 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
- */
-static bool mei_clear_list(struct mei_device *dev,
- struct file *file, struct list_head *mei_cb_list)
-{
- struct mei_cl_cb *cb_pos = NULL;
- struct mei_cl_cb *cb_next = NULL;
- struct file *file_temp;
- bool removed = false;
-
- /* list all list member */
- list_for_each_entry_safe(cb_pos, cb_next, mei_cb_list, cb_list) {
- file_temp = (struct file *)cb_pos->file_object;
- /* check if list member associated with a file */
- if (file_temp == file) {
- /* remove member from the list */
- list_del(&cb_pos->cb_list);
- /* check if cb equal to current iamthif cb */
- if (dev->iamthif_current_cb == cb_pos) {
- dev->iamthif_current_cb = NULL;
- /* send flow control to iamthif client */
- mei_send_flow_control(dev, &dev->iamthif_cl);
- }
- /* free all allocated buffers */
- mei_free_cb_private(cb_pos);
- cb_pos = NULL;
- removed = true;
- }
- }
- return removed;
-}
-
-/**
- * mei_clear_lists - removes all callbacks associated with file
- *
- * @dev: device structure
- * @file: file structure
- *
- * 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
- */
-static bool mei_clear_lists(struct mei_device *dev, struct file *file)
-{
- bool removed = false;
-
- /* remove callbacks associated with a file */
- mei_clear_list(dev, file, &dev->amthi_cmd_list.mei_cb.cb_list);
- if (mei_clear_list(dev, file,
- &dev->amthi_read_complete_list.mei_cb.cb_list))
- removed = true;
-
- mei_clear_list(dev, file, &dev->ctrl_rd_list.mei_cb.cb_list);
-
- if (mei_clear_list(dev, file, &dev->ctrl_wr_list.mei_cb.cb_list))
- removed = true;
-
- if (mei_clear_list(dev, file, &dev->write_waiting_list.mei_cb.cb_list))
- removed = true;
-
- if (mei_clear_list(dev, file, &dev->write_list.mei_cb.cb_list))
- removed = true;
-
- /* check if iamthif_current_cb not NULL */
- if (dev->iamthif_current_cb && !removed) {
- /* check file and iamthif current cb association */
- if (dev->iamthif_current_cb->file_object == file) {
- /* remove cb */
- mei_free_cb_private(dev->iamthif_current_cb);
- dev->iamthif_current_cb = NULL;
- removed = true;
- }
- }
- return removed;
-}
-/**
* find_read_list_entry - find read list entry
*
* @dev: device structure
@@ -192,14 +105,9 @@ static struct mei_cl_cb *find_read_list_entry(
struct mei_cl_cb *next = NULL;
dev_dbg(&dev->pdev->dev, "remove read_list CB\n");
- list_for_each_entry_safe(pos, next,
- &dev->read_list.mei_cb.cb_list, cb_list) {
- struct mei_cl *cl_temp;
- cl_temp = (struct mei_cl *)pos->file_private;
-
- if (mei_cl_cmp_id(cl, cl_temp))
+ list_for_each_entry_safe(pos, next, &dev->read_list.list, list)
+ if (mei_cl_cmp_id(cl, pos->cl))
return pos;
- }
return NULL;
}
@@ -297,67 +205,51 @@ static int mei_release(struct inode *inode, struct file *file)
dev = cl->dev;
mutex_lock(&dev->device_lock);
- if (cl != &dev->iamthif_cl) {
- if (cl->state == MEI_FILE_CONNECTED) {
- cl->state = MEI_FILE_DISCONNECTING;
- dev_dbg(&dev->pdev->dev,
- "disconnecting client host client = %d, "
- "ME client = %d\n",
- cl->host_client_id,
- cl->me_client_id);
- rets = mei_disconnect_host_client(dev, cl);
- }
- mei_cl_flush_queues(cl);
- dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
+ if (cl == &dev->iamthif_cl) {
+ rets = mei_amthif_release(dev, file);
+ goto out;
+ }
+ if (cl->state == MEI_FILE_CONNECTED) {
+ cl->state = MEI_FILE_DISCONNECTING;
+ dev_dbg(&dev->pdev->dev,
+ "disconnecting client host client = %d, "
+ "ME client = %d\n",
cl->host_client_id,
cl->me_client_id);
+ rets = mei_disconnect_host_client(dev, cl);
+ }
+ mei_cl_flush_queues(cl);
+ dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n",
+ cl->host_client_id,
+ cl->me_client_id);
+
+ if (dev->open_handle_count > 0) {
+ clear_bit(cl->host_client_id, dev->host_clients_map);
+ dev->open_handle_count--;
+ }
+ mei_me_cl_unlink(dev, cl);
- if (dev->open_handle_count > 0) {
- clear_bit(cl->host_client_id, dev->host_clients_map);
- dev->open_handle_count--;
- }
- mei_remove_client_from_file_list(dev, cl->host_client_id);
-
- /* free read cb */
- cb = NULL;
- if (cl->read_cb) {
- cb = find_read_list_entry(dev, cl);
- /* Remove entry from read list */
- if (cb)
- list_del(&cb->cb_list);
-
- cb = cl->read_cb;
- cl->read_cb = NULL;
- }
-
- file->private_data = NULL;
-
- if (cb) {
- mei_free_cb_private(cb);
- cb = NULL;
- }
+ /* free read cb */
+ cb = NULL;
+ if (cl->read_cb) {
+ cb = find_read_list_entry(dev, cl);
+ /* Remove entry from read list */
+ if (cb)
+ list_del(&cb->list);
- kfree(cl);
- } else {
- if (dev->open_handle_count > 0)
- dev->open_handle_count--;
-
- if (dev->iamthif_file_object == file &&
- dev->iamthif_state != MEI_IAMTHIF_IDLE) {
-
- dev_dbg(&dev->pdev->dev, "amthi 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 amthi iamthif cb\n");
- mei_run_next_iamthif_cmd(dev);
- }
- }
+ cb = cl->read_cb;
+ cl->read_cb = NULL;
+ }
- if (mei_clear_lists(dev, file))
- dev->iamthif_state = MEI_IAMTHIF_IDLE;
+ file->private_data = NULL;
+ if (cb) {
+ mei_io_cb_free(cb);
+ cb = NULL;
}
+
+ kfree(cl);
+out:
mutex_unlock(&dev->device_lock);
return rets;
}
@@ -411,20 +303,19 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
}
if (cl == &dev->iamthif_cl) {
- rets = amthi_read(dev, file, ubuf, length, offset);
+ rets = mei_amthif_read(dev, file, ubuf, length, offset);
goto out;
}
- if (cl->read_cb && cl->read_cb->information > *offset) {
+ if (cl->read_cb && cl->read_cb->buf_idx > *offset) {
cb = cl->read_cb;
goto copy_buffer;
- } else if (cl->read_cb && cl->read_cb->information > 0 &&
- cl->read_cb->information <= *offset) {
+ } else if (cl->read_cb && cl->read_cb->buf_idx > 0 &&
+ cl->read_cb->buf_idx <= *offset) {
cb = cl->read_cb;
rets = 0;
goto free;
- } else if ((!cl->read_cb || !cl->read_cb->information) &&
- *offset > 0) {
+ } else if ((!cl->read_cb || !cl->read_cb->buf_idx) && *offset > 0) {
/*Offset needs to be cleaned for contiguous reads*/
*offset = 0;
rets = 0;
@@ -481,16 +372,15 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
copy_buffer:
dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n",
cb->response_buffer.size);
- dev_dbg(&dev->pdev->dev, "cb->information - %lu\n",
- cb->information);
- if (length == 0 || ubuf == NULL || *offset > cb->information) {
+ dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx);
+ if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) {
rets = -EMSGSIZE;
goto free;
}
- /* length is being truncated to PAGE_SIZE, however, */
- /* information size may be longer */
- length = min_t(size_t, length, (cb->information - *offset));
+ /* length is being truncated to PAGE_SIZE,
+ * however buf_idx may point beyond that */
+ length = min_t(size_t, length, cb->buf_idx - *offset);
if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
rets = -EFAULT;
@@ -499,15 +389,15 @@ copy_buffer:
rets = length;
*offset += length;
- if ((unsigned long)*offset < cb->information)
+ if ((unsigned long)*offset < cb->buf_idx)
goto out;
free:
cb_pos = find_read_list_entry(dev, cl);
/* Remove entry from read list */
if (cb_pos)
- list_del(&cb_pos->cb_list);
- mei_free_cb_private(cb);
+ list_del(&cb_pos->list);
+ mei_io_cb_free(cb);
cl->reading_state = MEI_IDLE;
cl->read_cb = NULL;
cl->read_pending = 0;
@@ -516,7 +406,6 @@ out:
mutex_unlock(&dev->device_lock);
return rets;
}
-
/**
* mei_write - the write function.
*
@@ -546,23 +435,39 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
mutex_lock(&dev->device_lock);
if (dev->dev_state != MEI_DEV_ENABLED) {
- mutex_unlock(&dev->device_lock);
- return -ENODEV;
+ rets = -ENODEV;
+ goto err;
}
+ i = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (i < 0) {
+ rets = -ENODEV;
+ goto err;
+ }
+ if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ rets = -EMSGSIZE;
+ goto err;
+ }
+
+ if (cl->state != MEI_FILE_CONNECTED) {
+ rets = -ENODEV;
+ dev_err(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d",
+ cl->host_client_id, cl->me_client_id);
+ goto err;
+ }
if (cl == &dev->iamthif_cl) {
- write_cb = find_amthi_read_list_entry(dev, file);
+ write_cb = mei_amthif_find_read_list_entry(dev, file);
if (write_cb) {
timeout = write_cb->read_time +
- msecs_to_jiffies(IAMTHIF_READ_TIMER);
+ mei_secs_to_jiffies(MEI_IAMTHIF_READ_TIMER);
if (time_after(jiffies, timeout) ||
- cl->reading_state == MEI_READ_COMPLETE) {
- *offset = 0;
- list_del(&write_cb->cb_list);
- mei_free_cb_private(write_cb);
- write_cb = NULL;
+ cl->reading_state == MEI_READ_COMPLETE) {
+ *offset = 0;
+ list_del(&write_cb->list);
+ mei_io_cb_free(write_cb);
+ write_cb = NULL;
}
}
}
@@ -572,8 +477,8 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
*offset = 0;
write_cb = find_read_list_entry(dev, cl);
if (write_cb) {
- list_del(&write_cb->cb_list);
- mei_free_cb_private(write_cb);
+ list_del(&write_cb->list);
+ mei_io_cb_free(write_cb);
write_cb = NULL;
cl->reading_state = MEI_IDLE;
cl->read_cb = NULL;
@@ -583,24 +488,21 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
*offset = 0;
- write_cb = kzalloc(sizeof(struct mei_cl_cb), GFP_KERNEL);
+ write_cb = mei_io_cb_init(cl, file);
if (!write_cb) {
- mutex_unlock(&dev->device_lock);
- return -ENOMEM;
+ dev_err(&dev->pdev->dev, "write cb allocation failed\n");
+ rets = -ENOMEM;
+ goto err;
}
+ rets = mei_io_cb_alloc_req_buf(write_cb, length);
+ if (rets)
+ goto err;
- write_cb->file_object = file;
- write_cb->file_private = cl;
- write_cb->request_buffer.data = kmalloc(length, GFP_KERNEL);
- rets = -ENOMEM;
- if (!write_cb->request_buffer.data)
- goto unlock_dev;
-
- dev_dbg(&dev->pdev->dev, "length =%d\n", (int) length);
+ dev_dbg(&dev->pdev->dev, "cb request size = %zd\n", length);
- rets = -EFAULT;
- if (copy_from_user(write_cb->request_buffer.data, ubuf, length))
- goto unlock_dev;
+ rets = copy_from_user(write_cb->request_buffer.data, ubuf, length);
+ if (rets)
+ goto err;
cl->sm_state = 0;
if (length == 4 &&
@@ -612,139 +514,71 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
write_cb->request_buffer.data, 4) == 0)))
cl->sm_state |= MEI_WD_STATE_INDEPENDENCE_MSG_SENT;
- INIT_LIST_HEAD(&write_cb->cb_list);
if (cl == &dev->iamthif_cl) {
- write_cb->response_buffer.data =
- kmalloc(dev->iamthif_mtu, GFP_KERNEL);
- if (!write_cb->response_buffer.data) {
- rets = -ENOMEM;
- goto unlock_dev;
- }
- if (dev->dev_state != MEI_DEV_ENABLED) {
- rets = -ENODEV;
- goto unlock_dev;
- }
- i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
- if (i < 0) {
- rets = -ENODEV;
- goto unlock_dev;
- }
- if (length > dev->me_clients[i].props.max_msg_length ||
- length <= 0) {
- rets = -EMSGSIZE;
- goto unlock_dev;
- }
+ rets = mei_amthif_write(dev, write_cb);
- write_cb->response_buffer.size = dev->iamthif_mtu;
- write_cb->major_file_operations = MEI_IOCTL;
- write_cb->information = 0;
- write_cb->request_buffer.size = length;
- if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
- rets = -ENODEV;
- goto unlock_dev;
- }
-
- if (!list_empty(&dev->amthi_cmd_list.mei_cb.cb_list) ||
- dev->iamthif_state != MEI_IAMTHIF_IDLE) {
- dev_dbg(&dev->pdev->dev, "amthi_state = %d\n",
- (int) dev->iamthif_state);
- dev_dbg(&dev->pdev->dev, "add amthi cb to amthi cmd waiting list\n");
- list_add_tail(&write_cb->cb_list,
- &dev->amthi_cmd_list.mei_cb.cb_list);
- rets = length;
- } else {
- dev_dbg(&dev->pdev->dev, "call amthi write\n");
- rets = amthi_write(dev, write_cb);
-
- if (rets) {
- dev_dbg(&dev->pdev->dev, "amthi write failed with status = %d\n",
- rets);
- goto unlock_dev;
- }
- rets = length;
+ if (rets) {
+ dev_err(&dev->pdev->dev,
+ "amthi write failed with status = %d\n", rets);
+ goto err;
}
mutex_unlock(&dev->device_lock);
- return rets;
+ return length;
}
- write_cb->major_file_operations = MEI_WRITE;
- /* make sure information is zero before we start */
-
- write_cb->information = 0;
- write_cb->request_buffer.size = length;
+ write_cb->fop_type = MEI_FOP_WRITE;
dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n",
cl->host_client_id, cl->me_client_id);
- if (cl->state != MEI_FILE_CONNECTED) {
- rets = -ENODEV;
- dev_dbg(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d",
- cl->host_client_id,
- cl->me_client_id);
- goto unlock_dev;
- }
- i = mei_me_cl_by_id(dev, cl->me_client_id);
- if (i < 0) {
- rets = -ENODEV;
- goto unlock_dev;
- }
- if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
- rets = -EINVAL;
- goto unlock_dev;
- }
- write_cb->file_private = cl;
-
rets = mei_flow_ctrl_creds(dev, cl);
if (rets < 0)
- goto unlock_dev;
+ goto err;
- if (rets && dev->mei_host_buffer_is_empty) {
- rets = 0;
- dev->mei_host_buffer_is_empty = false;
- if (length > mei_hbuf_max_data(dev)) {
- mei_hdr.length = mei_hbuf_max_data(dev);
- mei_hdr.msg_complete = 0;
- } else {
- mei_hdr.length = length;
- mei_hdr.msg_complete = 1;
- }
- mei_hdr.host_addr = cl->host_client_id;
- mei_hdr.me_addr = cl->me_client_id;
- mei_hdr.reserved = 0;
- dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n",
- *((u32 *) &mei_hdr));
- if (mei_write_message(dev, &mei_hdr,
- (unsigned char *) (write_cb->request_buffer.data),
- mei_hdr.length)) {
- rets = -ENODEV;
- goto unlock_dev;
- }
+ if (rets == 0 || dev->mei_host_buffer_is_empty == false) {
+ write_cb->buf_idx = 0;
+ mei_hdr.msg_complete = 0;
cl->writing_state = MEI_WRITING;
- write_cb->information = mei_hdr.length;
- if (mei_hdr.msg_complete) {
- if (mei_flow_ctrl_reduce(dev, cl)) {
- rets = -ENODEV;
- goto unlock_dev;
- }
- list_add_tail(&write_cb->cb_list,
- &dev->write_waiting_list.mei_cb.cb_list);
- } else {
- list_add_tail(&write_cb->cb_list,
- &dev->write_list.mei_cb.cb_list);
- }
+ goto out;
+ }
+ dev->mei_host_buffer_is_empty = false;
+ if (length > mei_hbuf_max_data(dev)) {
+ mei_hdr.length = mei_hbuf_max_data(dev);
+ mei_hdr.msg_complete = 0;
} else {
+ mei_hdr.length = length;
+ mei_hdr.msg_complete = 1;
+ }
+ mei_hdr.host_addr = cl->host_client_id;
+ mei_hdr.me_addr = cl->me_client_id;
+ mei_hdr.reserved = 0;
+ dev_dbg(&dev->pdev->dev, "call mei_write_message header=%08x.\n",
+ *((u32 *) &mei_hdr));
+ if (mei_write_message(dev, &mei_hdr,
+ write_cb->request_buffer.data, mei_hdr.length)) {
+ rets = -ENODEV;
+ goto err;
+ }
+ cl->writing_state = MEI_WRITING;
+ write_cb->buf_idx = mei_hdr.length;
- write_cb->information = 0;
- cl->writing_state = MEI_WRITING;
- list_add_tail(&write_cb->cb_list,
- &dev->write_list.mei_cb.cb_list);
+out:
+ if (mei_hdr.msg_complete) {
+ if (mei_flow_ctrl_reduce(dev, cl)) {
+ rets = -ENODEV;
+ goto err;
+ }
+ list_add_tail(&write_cb->list, &dev->write_waiting_list.list);
+ } else {
+ list_add_tail(&write_cb->list, &dev->write_list.list);
}
+
mutex_unlock(&dev->device_lock);
return length;
-unlock_dev:
+err:
mutex_unlock(&dev->device_lock);
- mei_free_cb_private(write_cb);
+ mei_io_cb_free(write_cb);
return rets;
}
@@ -860,15 +694,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
if (cl == &dev->iamthif_cl) {
- mutex_unlock(&dev->device_lock);
- poll_wait(file, &dev->iamthif_cl.wait, wait);
- mutex_lock(&dev->device_lock);
- if (dev->iamthif_state == MEI_IAMTHIF_READ_COMPLETE &&
- dev->iamthif_file_object == file) {
- mask |= (POLLIN | POLLRDNORM);
- dev_dbg(&dev->pdev->dev, "run next amthi cb\n");
- mei_run_next_iamthif_cmd(dev);
- }
+ mask = mei_amthif_poll(dev, file, wait);
goto out;
}
@@ -917,7 +743,7 @@ static struct miscdevice mei_misc_device = {
*
* returns true if ME Interface is valid, false otherwise
*/
-static bool __devinit mei_quirk_probe(struct pci_dev *pdev,
+static bool mei_quirk_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
u32 reg;
@@ -939,7 +765,7 @@ static bool __devinit mei_quirk_probe(struct pci_dev *pdev,
*
* returns 0 on success, <0 on failure.
*/
-static int __devinit mei_probe(struct pci_dev *pdev,
+static int mei_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct mei_device *dev;
@@ -1003,6 +829,8 @@ static int __devinit mei_probe(struct pci_dev *pdev,
goto disable_msi;
}
INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
+ INIT_WORK(&dev->init_work, mei_host_client_init);
+
if (mei_hw_init(dev)) {
dev_err(&pdev->dev, "init hw failure.\n");
err = -ENODEV;
@@ -1054,7 +882,7 @@ end:
* mei_remove is called by the PCI subsystem to alert the driver
* that it should release a PCI device.
*/
-static void __devexit mei_remove(struct pci_dev *pdev)
+static void mei_remove(struct pci_dev *pdev)
{
struct mei_device *dev;
@@ -1087,8 +915,8 @@ static void __devexit mei_remove(struct pci_dev *pdev)
/* remove entry if already in list */
dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n");
- mei_remove_client_from_file_list(dev, dev->wd_cl.host_client_id);
- mei_remove_client_from_file_list(dev, dev->iamthif_cl.host_client_id);
+ mei_me_cl_unlink(dev, &dev->wd_cl);
+ mei_me_cl_unlink(dev, &dev->iamthif_cl);
dev->iamthif_current_cb = NULL;
dev->me_clients_num = 0;
@@ -1195,8 +1023,8 @@ static struct pci_driver mei_driver = {
.name = KBUILD_MODNAME,
.id_table = mei_pci_tbl,
.probe = mei_probe,
- .remove = __devexit_p(mei_remove),
- .shutdown = __devexit_p(mei_remove),
+ .remove = mei_remove,
+ .shutdown = mei_remove,
.driver.pm = MEI_PM_OPS,
};