lpfc 8.2.8 : Add kernel-doc function headers - part 3

diff -upNr a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -1,7 +1,7 @@
 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
- * Copyright (C) 2007 Emulex.  All rights reserved.                *
+ * Copyright (C) 2007-2008 Emulex.  All rights reserved.           *
  * EMULEX and SLI are trademarks of Emulex.                        *
  * www.emulex.com                                                  *
  *                                                                 *

@@ -47,13 +47,14 @@
 #include "lpfc_debugfs.h"
 
 #ifdef CONFIG_LPFC_DEBUG_FS
-/* debugfs interface
+/**
+ * debugfs interface
  *
  * To access this interface the user should:
  * # mkdir /debug
  * # mount -t debugfs none /debug
  *
- * The lpfc debugfs directory hierachy is:
+ * The lpfc debugfs directory hierarchy is:
  * lpfc/lpfcX/vportY
  * where X is the lpfc hba unique_id
  * where Y is the vport VPI on that hba

@@ -62,14 +63,21 @@
  * discovery_trace
  * This is an ACSII readable file that contains a trace of the last
  * lpfc_debugfs_max_disc_trc events that happened on a specific vport.
- * See lpfc_debugfs.h for different categories of
- * discovery events. To enable the discovery trace, the following
- * module parameters must be set:
+ * See lpfc_debugfs.h for different categories of  discovery events.
+ * To enable the discovery trace, the following module parameters must be set:
  * lpfc_debugfs_enable=1         Turns on lpfc debugfs filesystem support
  * lpfc_debugfs_max_disc_trc=X   Where X is the event trace depth for
  *                               EACH vport. X MUST also be a power of 2.
  * lpfc_debugfs_mask_disc_trc=Y  Where Y is an event mask as defined in
  *                               lpfc_debugfs.h .
+ *
+ * slow_ring_trace
+ * This is an ACSII readable file that contains a trace of the last
+ * lpfc_debugfs_max_slow_ring_trc events that happened on a specific HBA.
+ * To enable the slow ring trace, the following module parameters must be set:
+ * lpfc_debugfs_enable=1         Turns on lpfc debugfs filesystem support
+ * lpfc_debugfs_max_slow_ring_trc=X   Where X is the event trace depth for
+ *                               the HBA. X MUST also be a power of 2.
  */
 static int lpfc_debugfs_enable = 1;
 module_param(lpfc_debugfs_enable, int, 0);

@@ -118,6 +126,25 @@ struct lpfc_debug {
 static atomic_t lpfc_debugfs_seq_trc_cnt = ATOMIC_INIT(0);
 static unsigned long lpfc_debugfs_start_time = 0L;
 
+/**
+ * lpfc_debugfs_disc_trc_data - Dump discovery logging to a buffer.
+ * @vport: The vport to gather the log info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine gathers the lpfc discovery debugfs data from the @vport and
+ * dumps it to @buf up to @size number of bytes. It will start at the next entry
+ * in the log and process the log until the end of the buffer. Then it will
+ * gather from the beginning of the log and process until the current entry.
+ *
+ * Notes:
+ * Discovery logging will be disabled while while this routine dumps the log.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_disc_trc_data(struct lpfc_vport *vport, char *buf, int size)
 {

@@ -126,7 +153,6 @@ lpfc_debugfs_disc_trc_data(struct lpfc_v
 	struct lpfc_debugfs_trc *dtp;
 	char buffer[LPFC_DEBUG_TRC_ENTRY_SIZE];
 
-
 	enable = lpfc_debugfs_enable;
 	lpfc_debugfs_enable = 0;
 

@@ -160,6 +186,25 @@ lpfc_debugfs_disc_trc_data(struct lpfc_v
 	return len;
 }
 
+/**
+ * lpfc_debugfs_slow_ring_trc_data - Dump slow ring logging to a buffer.
+ * @phba: The HBA to gather the log info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine gathers the lpfc slow ring debugfs data from the @phba and
+ * dumps it to @buf up to @size number of bytes. It will start at the next entry
+ * in the log and process the log until the end of the buffer. Then it will
+ * gather from the beginning of the log and process until the current entry.
+ *
+ * Notes:
+ * Slow ring logging will be disabled while while this routine dumps the log.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_slow_ring_trc_data(struct lpfc_hba *phba, char *buf, int size)
 {

@@ -204,6 +249,25 @@ lpfc_debugfs_slow_ring_trc_data(struct l
 
 static int lpfc_debugfs_last_hbq = -1;
 
+/**
+ * lpfc_debugfs_hbqinfo_data - Dump host buffer queue info to a buffer.
+ * @phba: The HBA to gather host buffer info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine dumps the host buffer queue info from the @phba to @buf up to
+ * @size number of bytes. A header that describes the current hbq state will be
+ * dumped to @buf first and then info on each hbq entry will be dumped to @buf
+ * until @size bytes have been dumped or all the hbq info has been dumped.
+ *
+ * Notes:
+ * This routine will rotate through each configured HBQ each time called.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_hbqinfo_data(struct lpfc_hba *phba, char *buf, int size)
 {

@@ -304,6 +368,24 @@ skipit:
 
 static int lpfc_debugfs_last_hba_slim_off;
 
+/**
+ * lpfc_debugfs_dumpHBASlim_data - Dump HBA SLIM info to a buffer.
+ * @phba: The HBA to gather SLIM info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine dumps the current contents of HBA SLIM for the HBA associated
+ * with @phba to @buf up to @size bytes of data. This is the raw HBA SLIM data.
+ *
+ * Notes:
+ * This routine will only dump up to 1024 bytes of data each time called and
+ * should be called multiple times to dump the entire HBA SLIM.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_dumpHBASlim_data(struct lpfc_hba *phba, char *buf, int size)
 {

@@ -343,6 +425,21 @@ lpfc_debugfs_dumpHBASlim_data(struct lpf
 	return len;
 }
 
+/**
+ * lpfc_debugfs_dumpHostSlim_data - Dump host SLIM info to a buffer.
+ * @phba: The HBA to gather Host SLIM info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine dumps the current contents of host SLIM for the host associated
+ * with @phba to @buf up to @size bytes of data. The dump will contain the
+ * Mailbox, PCB, Rings, and Registers that are located in host memory.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_dumpHostSlim_data(struct lpfc_hba *phba, char *buf, int size)
 {

@@ -431,6 +528,21 @@ lpfc_debugfs_dumpHostSlim_data(struct lp
 	return len;
 }
 
+/**
+ * lpfc_debugfs_nodelist_data - Dump target node list to a buffer.
+ * @vport: The vport to gather target node info from.
+ * @buf: The buffer to dump log into.
+ * @size: The maximum amount of data to process.
+ *
+ * Description:
+ * This routine dumps the current target node list associated with @vport to
+ * @buf up to @size bytes of data. Each node entry in the dump will contain a
+ * node state, DID, WWPN, WWNN, RPI, flags, type, and other useful fields.
+ *
+ * Return Value:
+ * This routine returns the amount of bytes that were dumped into @buf and will
+ * not exceed @size.
+ **/
 static int
 lpfc_debugfs_nodelist_data(struct lpfc_vport *vport, char *buf, int size)
 {

@@ -514,7 +626,22 @@ lpfc_debugfs_nodelist_data(struct lpfc_v
 }
 #endif
 
-
+/**
+ * lpfc_debugfs_disc_trc - Store discovery trace log.
+ * @vport: The vport to associate this trace string with for retrieval.
+ * @mask: Log entry classification.
+ * @fmt: Format string to be displayed when dumping the log.
+ * @data1: 1st data parameter to be applied to @fmt.
+ * @data2: 2nd data parameter to be applied to @fmt.
+ * @data3: 3rd data parameter to be applied to @fmt.
+ *
+ * Description:
+ * This routine is used by the driver code to add a debugfs log entry to the
+ * discovery trace buffer associated with @vport. Only entries with a @mask that
+ * match the current debugfs discovery mask will be saved. Entries that do not
+ * match will be thrown away. @fmt, @data1, @data2, and @data3 are used like
+ * printf when displaying the log.
+ **/
 inline void
 lpfc_debugfs_disc_trc(struct lpfc_vport *vport, int mask, char *fmt,
 	uint32_t data1, uint32_t data2, uint32_t data3)

@@ -543,6 +670,19 @@ lpfc_debugfs_disc_trc(struct lpfc_vport 
 	return;
 }
 
+/**
+ * lpfc_debugfs_slow_ring_trc - Store slow ring trace log.
+ * @phba: The phba to associate this trace string with for retrieval.
+ * @fmt: Format string to be displayed when dumping the log.
+ * @data1: 1st data parameter to be applied to @fmt.
+ * @data2: 2nd data parameter to be applied to @fmt.
+ * @data3: 3rd data parameter to be applied to @fmt.
+ *
+ * Description:
+ * This routine is used by the driver code to add a debugfs log entry to the
+ * discovery trace buffer associated with @vport. @fmt, @data1, @data2, and
+ * @data3 are used like printf when displaying the log.
+ **/
 inline void
 lpfc_debugfs_slow_ring_trc(struct lpfc_hba *phba, char *fmt,
 	uint32_t data1, uint32_t data2, uint32_t data3)

@@ -569,6 +709,21 @@ lpfc_debugfs_slow_ring_trc(struct lpfc_h
 }
 
 #ifdef CONFIG_LPFC_DEBUG_FS
+/**
+ * lpfc_debugfs_disc_trc_open - Open the discovery trace log.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_disc_trc_open(struct inode *inode, struct file *file)
 {

@@ -586,7 +741,7 @@ lpfc_debugfs_disc_trc_open(struct inode 
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	size =  (lpfc_debugfs_max_disc_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
 	size = PAGE_ALIGN(size);
 

@@ -604,6 +759,21 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_slow_ring_trc_open - Open the Slow Ring trace log.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_slow_ring_trc_open(struct inode *inode, struct file *file)
 {

@@ -621,7 +791,7 @@ lpfc_debugfs_slow_ring_trc_open(struct i
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	size =  (lpfc_debugfs_max_slow_ring_trc * LPFC_DEBUG_TRC_ENTRY_SIZE);
 	size = PAGE_ALIGN(size);
 

@@ -639,6 +809,21 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_hbqinfo_open - Open the hbqinfo debugfs buffer.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_hbqinfo_open(struct inode *inode, struct file *file)
 {

@@ -650,7 +835,7 @@ lpfc_debugfs_hbqinfo_open(struct inode *
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	debug->buffer = kmalloc(LPFC_HBQINFO_SIZE, GFP_KERNEL);
 	if (!debug->buffer) {
 		kfree(debug);

@@ -666,6 +851,21 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_dumpHBASlim_open - Open the Dump HBA SLIM debugfs buffer.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_dumpHBASlim_open(struct inode *inode, struct file *file)
 {

@@ -677,7 +877,7 @@ lpfc_debugfs_dumpHBASlim_open(struct ino
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	debug->buffer = kmalloc(LPFC_DUMPHBASLIM_SIZE, GFP_KERNEL);
 	if (!debug->buffer) {
 		kfree(debug);

@@ -693,6 +893,21 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_dumpHostSlim_open - Open the Dump Host SLIM debugfs buffer.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_dumpHostSlim_open(struct inode *inode, struct file *file)
 {

@@ -704,7 +919,7 @@ lpfc_debugfs_dumpHostSlim_open(struct in
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	debug->buffer = kmalloc(LPFC_DUMPHOSTSLIM_SIZE, GFP_KERNEL);
 	if (!debug->buffer) {
 		kfree(debug);

@@ -720,6 +935,21 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_nodelist_open - Open the nodelist debugfs file.
+ * @inode: The inode pointer that contains a vport pointer.
+ * @file: The file pointer to attach the log output.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs open file operation. It gets
+ * the vport from the i_private field in @inode, allocates the necessary buffer
+ * for the log, fills the buffer from the in-memory log for this vport, and then
+ * returns a pointer to that log in the private_data field in @file.
+ *
+ * Returns:
+ * This function returns zero if successful. On error it will return an negative
+ * error value.
+ **/
 static int
 lpfc_debugfs_nodelist_open(struct inode *inode, struct file *file)
 {

@@ -731,7 +961,7 @@ lpfc_debugfs_nodelist_open(struct inode 
 	if (!debug)
 		goto out;
 
-	/* Round to page boundry */
+	/* Round to page boundary */
 	debug->buffer = kmalloc(LPFC_NODELIST_SIZE, GFP_KERNEL);
 	if (!debug->buffer) {
 		kfree(debug);

@@ -747,6 +977,23 @@ out:
 	return rc;
 }
 
+/**
+ * lpfc_debugfs_lseek - Seek through a debugfs file.
+ * @file: The file pointer to seek through.
+ * @off: The offset to seek to or the amount to seek by.
+ * @whence: Indicates how to seek.
+ *
+ * Description:
+ * This routine is the entry point for the debugfs lseek file operation. The
+ * @whence parameter indicates whether @off is the offset to directly seek to,
+ * or if it is a value to seek forward or reverse by. This function figures out
+ * what the new offset of the debugfs file will be and assigns that value to the
+ * f_pos field of @file.
+ *
+ * Returns:
+ * This function returns the new offset if successful and returns a negative
+ * error if unable to process the seek.
+ **/
 static loff_t
 lpfc_debugfs_lseek(struct file *file, loff_t off, int whence)
 {

@@ -768,6 +1015,22 @@ lpfc_debugfs_lseek(struct file *file, lo
 	return (pos < 0 || pos > debug->len) ? -EINVAL : (file->f_pos = pos);
 }
 
+/**
+ * lpfc_debugfs_read - Read a debugfs file.
+ * @file: The file pointer to read from.
+ * @buf: The buffer to copy the data to.
+ * @nbytes: The number of bytes to read.
+ * @ppos: The position in the file to start reading from.
+ *
+ * Description:
+ * This routine reads data from from the buffer indicated in the private_data
+ * field of @file. It will start reading at @ppos and copy up to @nbytes of
+ * data to @buf.
+ *
+ * Returns:
+ * This function returns the amount of data that was read (this could be less
+ * than @nbytes if the end of the file was reached) or a negative error value.
+ **/
 static ssize_t
 lpfc_debugfs_read(struct file *file, char __user *buf,
 		  size_t nbytes, loff_t *ppos)

@@ -777,6 +1040,18 @@ lpfc_debugfs_read(struct file *file, cha
 				       debug->len);
 }
 
+/**
+ * lpfc_debugfs_release - Release the buffer used to store debugfs file data.
+ * @inode: The inode pointer that contains a vport pointer. (unused)
+ * @file: The file pointer that contains the buffer to release.
+ *
+ * Description:
+ * This routine frees the buffer that was allocated when the debugfs file was
+ * opened.
+ *
+ * Returns:
+ * This function returns zero.
+ **/
 static int
 lpfc_debugfs_release(struct inode *inode, struct file *file)
 {

@@ -846,6 +1121,16 @@ static struct dentry *lpfc_debugfs_root 
 static atomic_t lpfc_debugfs_hba_count;
 #endif
 
+/**
+ * lpfc_debugfs_initialize - Initialize debugfs for a vport.
+ * @vport: The vport pointer to initialize.
+ *
+ * Description:
+ * When Debugfs is configured this routine sets up the lpfc debugfs file system.
+ * If not already created, this routine will create the lpfc directory, and
+ * lpfcX directory (for this HBA), and vportX directory for this vport. It will
+ * also create each file used to access lpfc specific debugfs information.
+ **/
 inline void
 lpfc_debugfs_initialize(struct lpfc_vport *vport)
 {

@@ -1034,7 +1319,17 @@ debug_failed:
 #endif
 }
 
-
+/**
+ * lpfc_debugfs_terminate -  Tear down debugfs infrastructure for this vport.
+ * @vport: The vport pointer to remove from debugfs.
+ *
+ * Description:
+ * When Debugfs is configured this routine removes debugfs file system elements
+ * that are specific to this vport. It also checks to see if there are any
+ * users left for the debugfs directories associated with the HBA and driver. If
+ * this is the last user of the HBA directory or driver directory then it will
+ * remove those from the debugfs infrastructure as well.
+ **/
 inline void
 lpfc_debugfs_terminate(struct lpfc_vport *vport)
 {

@@ -1097,5 +1392,3 @@ lpfc_debugfs_terminate(struct lpfc_vport
 #endif
 	return;
 }
-
-

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