-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[SCSI] qla2xxx: Add Fibre Channel Event (FCE) tracing support.
FCE support enables the firmware to record FC extended link services and basic link services frames which have been transmitted and received by the ISP. This allows for a limited view of the FC traffic through the ISP without using a FC analyzer. This can be useful in situations where a physical connection to the FC bus is not possible. The driver exports this information in two ways -- first, via a debugfs node exported for all supported ISPs under: <debugfs_mount_point>/qla2xxx/qla2xxx_<host_no>/fce where a read of the 'fce' file will provide a snapshot of the firmware's FCE buffer; and finally, the FCE buffer will be extracted during a firmware-dump scenario. Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
- Loading branch information
Andrew Vasquez
authored and
James Bottomley
committed
Jan 23, 2008
1 parent
00b6bd2
commit df613b9
Showing
10 changed files
with
405 additions
and
14 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| qla2xxx-y := qla_os.o qla_init.o qla_mbx.o qla_iocb.o qla_isr.o qla_gs.o \ | ||
| qla_dbg.o qla_sup.o qla_attr.o qla_mid.o | ||
| qla_dbg.o qla_sup.o qla_attr.o qla_mid.o qla_dfs.o | ||
|
|
||
| obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx.o |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,175 @@ | ||
| /* | ||
| * QLogic Fibre Channel HBA Driver | ||
| * Copyright (c) 2003-2005 QLogic Corporation | ||
| * | ||
| * See LICENSE.qla2xxx for copyright and licensing details. | ||
| */ | ||
| #include "qla_def.h" | ||
|
|
||
| #include <linux/debugfs.h> | ||
| #include <linux/seq_file.h> | ||
|
|
||
| static struct dentry *qla2x00_dfs_root; | ||
| static atomic_t qla2x00_dfs_root_count; | ||
|
|
||
| static int | ||
| qla2x00_dfs_fce_show(struct seq_file *s, void *unused) | ||
| { | ||
| scsi_qla_host_t *ha = s->private; | ||
| uint32_t cnt; | ||
| uint32_t *fce; | ||
| uint64_t fce_start; | ||
|
|
||
| mutex_lock(&ha->fce_mutex); | ||
|
|
||
| seq_printf(s, "FCE Trace Buffer\n"); | ||
| seq_printf(s, "In Pointer = %llx\n\n", ha->fce_wr); | ||
| seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma); | ||
| seq_printf(s, "FCE Enable Registers\n"); | ||
| seq_printf(s, "%08x %08x %08x %08x %08x %08x\n", | ||
| ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4], | ||
| ha->fce_mb[5], ha->fce_mb[6]); | ||
|
|
||
| fce = (uint32_t *) ha->fce; | ||
| fce_start = (unsigned long long) ha->fce_dma; | ||
| for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) { | ||
| if (cnt % 8 == 0) | ||
| seq_printf(s, "\n%llx: ", | ||
| (unsigned long long)((cnt * 4) + fce_start)); | ||
| else | ||
| seq_printf(s, " "); | ||
| seq_printf(s, "%08x", *fce++); | ||
| } | ||
|
|
||
| seq_printf(s, "\nEnd\n"); | ||
|
|
||
| mutex_unlock(&ha->fce_mutex); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| static int | ||
| qla2x00_dfs_fce_open(struct inode *inode, struct file *file) | ||
| { | ||
| scsi_qla_host_t *ha = inode->i_private; | ||
| int rval; | ||
|
|
||
| if (!ha->flags.fce_enabled) | ||
| goto out; | ||
|
|
||
| mutex_lock(&ha->fce_mutex); | ||
|
|
||
| /* Pause tracing to flush FCE buffers. */ | ||
| rval = qla2x00_disable_fce_trace(ha, &ha->fce_wr, &ha->fce_rd); | ||
| if (rval) | ||
| qla_printk(KERN_WARNING, ha, | ||
| "DebugFS: Unable to disable FCE (%d).\n", rval); | ||
|
|
||
| ha->flags.fce_enabled = 0; | ||
|
|
||
| mutex_unlock(&ha->fce_mutex); | ||
| out: | ||
| return single_open(file, qla2x00_dfs_fce_show, ha); | ||
| } | ||
|
|
||
| static int | ||
| qla2x00_dfs_fce_release(struct inode *inode, struct file *file) | ||
| { | ||
| scsi_qla_host_t *ha = inode->i_private; | ||
| int rval; | ||
|
|
||
| if (ha->flags.fce_enabled) | ||
| goto out; | ||
|
|
||
| mutex_lock(&ha->fce_mutex); | ||
|
|
||
| /* Re-enable FCE tracing. */ | ||
| ha->flags.fce_enabled = 1; | ||
| memset(ha->fce, 0, fce_calc_size(ha->fce_bufs)); | ||
| rval = qla2x00_enable_fce_trace(ha, ha->fce_dma, ha->fce_bufs, | ||
| ha->fce_mb, &ha->fce_bufs); | ||
| if (rval) { | ||
| qla_printk(KERN_WARNING, ha, | ||
| "DebugFS: Unable to reinitialize FCE (%d).\n", rval); | ||
| ha->flags.fce_enabled = 0; | ||
| } | ||
|
|
||
| mutex_unlock(&ha->fce_mutex); | ||
| out: | ||
| return single_release(inode, file); | ||
| } | ||
|
|
||
| static const struct file_operations dfs_fce_ops = { | ||
| .open = qla2x00_dfs_fce_open, | ||
| .read = seq_read, | ||
| .llseek = seq_lseek, | ||
| .release = qla2x00_dfs_fce_release, | ||
| }; | ||
|
|
||
| int | ||
| qla2x00_dfs_setup(scsi_qla_host_t *ha) | ||
| { | ||
| if (!IS_QLA25XX(ha)) | ||
| goto out; | ||
| if (!ha->fce) | ||
| goto out; | ||
|
|
||
| if (qla2x00_dfs_root) | ||
| goto create_dir; | ||
|
|
||
| atomic_set(&qla2x00_dfs_root_count, 0); | ||
| qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL); | ||
| if (!qla2x00_dfs_root) { | ||
| qla_printk(KERN_NOTICE, ha, | ||
| "DebugFS: Unable to create root directory.\n"); | ||
| goto out; | ||
| } | ||
|
|
||
| create_dir: | ||
| if (ha->dfs_dir) | ||
| goto create_nodes; | ||
|
|
||
| mutex_init(&ha->fce_mutex); | ||
| ha->dfs_dir = debugfs_create_dir(ha->host_str, qla2x00_dfs_root); | ||
| if (!ha->dfs_dir) { | ||
| qla_printk(KERN_NOTICE, ha, | ||
| "DebugFS: Unable to create ha directory.\n"); | ||
| goto out; | ||
| } | ||
|
|
||
| atomic_inc(&qla2x00_dfs_root_count); | ||
|
|
||
| create_nodes: | ||
| ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, ha, | ||
| &dfs_fce_ops); | ||
| if (!ha->dfs_fce) { | ||
| qla_printk(KERN_NOTICE, ha, | ||
| "DebugFS: Unable to fce node.\n"); | ||
| goto out; | ||
| } | ||
| out: | ||
| return 0; | ||
| } | ||
|
|
||
| int | ||
| qla2x00_dfs_remove(scsi_qla_host_t *ha) | ||
| { | ||
| if (ha->dfs_fce) { | ||
| debugfs_remove(ha->dfs_fce); | ||
| ha->dfs_fce = NULL; | ||
| } | ||
|
|
||
| if (ha->dfs_dir) { | ||
| debugfs_remove(ha->dfs_dir); | ||
| ha->dfs_dir = NULL; | ||
| atomic_dec(&qla2x00_dfs_root_count); | ||
| } | ||
|
|
||
| if (atomic_read(&qla2x00_dfs_root_count) == 0 && | ||
| qla2x00_dfs_root) { | ||
| debugfs_remove(qla2x00_dfs_root); | ||
| qla2x00_dfs_root = NULL; | ||
| } | ||
|
|
||
| return 0; | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.