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authorJames Smart <James.Smart@Emulex.Com>2008-12-04 22:40:02 -0500
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2008-12-29 11:24:28 -0600
commite2a0a9d69ce224c6f5b72515d81150e6bf4a905a (patch)
treefdd6d82431841c31c80cbabc24927fbb94c59cd6 /drivers/scsi/lpfc/lpfc_debugfs.c
parent81301a9b05c3690bf32bf4ef37d941f0f870a7ba (diff)
[SCSI] lpfc 8.3.0 : Add BlockGuard support (T10-DIF) code
Add SCSI data path, error handling, and debugfs code to complete BlockGuard support. Signed-off-by: James Smart <James.Smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_debugfs.c')
-rw-r--r--drivers/scsi/lpfc/lpfc_debugfs.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 771920bdde4..992009a9470 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -907,6 +907,91 @@ out:
return rc;
}
+static int
+lpfc_debugfs_dumpData_open(struct inode *inode, struct file *file)
+{
+ struct lpfc_debug *debug;
+ int rc = -ENOMEM;
+
+ if (!_dump_buf_data)
+ return -EBUSY;
+
+ debug = kmalloc(sizeof(*debug), GFP_KERNEL);
+ if (!debug)
+ goto out;
+
+ /* Round to page boundry */
+ printk(KERN_ERR "BLKGRD %s: _dump_buf_data=0x%p\n",
+ __func__, _dump_buf_data);
+ debug->buffer = _dump_buf_data;
+ if (!debug->buffer) {
+ kfree(debug);
+ goto out;
+ }
+
+ debug->len = (1 << _dump_buf_data_order) << PAGE_SHIFT;
+ file->private_data = debug;
+
+ rc = 0;
+out:
+ return rc;
+}
+
+static int
+lpfc_debugfs_dumpDif_open(struct inode *inode, struct file *file)
+{
+ struct lpfc_debug *debug;
+ int rc = -ENOMEM;
+
+ if (!_dump_buf_dif)
+ return -EBUSY;
+
+ debug = kmalloc(sizeof(*debug), GFP_KERNEL);
+ if (!debug)
+ goto out;
+
+ /* Round to page boundry */
+ printk(KERN_ERR "BLKGRD %s: _dump_buf_dif=0x%p file=%s\n", __func__,
+ _dump_buf_dif, file->f_dentry->d_name.name);
+ debug->buffer = _dump_buf_dif;
+ if (!debug->buffer) {
+ kfree(debug);
+ goto out;
+ }
+
+ debug->len = (1 << _dump_buf_dif_order) << PAGE_SHIFT;
+ file->private_data = debug;
+
+ rc = 0;
+out:
+ return rc;
+}
+
+static ssize_t
+lpfc_debugfs_dumpDataDif_write(struct file *file, const char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ /*
+ * The Data/DIF buffers only save one failing IO
+ * The write op is used as a reset mechanism after an IO has
+ * already been saved to the next one can be saved
+ */
+ spin_lock(&_dump_buf_lock);
+
+ memset((void *)_dump_buf_data, 0,
+ ((1 << PAGE_SHIFT) << _dump_buf_data_order));
+ memset((void *)_dump_buf_dif, 0,
+ ((1 << PAGE_SHIFT) << _dump_buf_dif_order));
+
+ _dump_buf_done = 0;
+
+ spin_unlock(&_dump_buf_lock);
+
+ return nbytes;
+}
+
+
+
/**
* lpfc_debugfs_nodelist_open - Open the nodelist debugfs file.
* @inode: The inode pointer that contains a vport pointer.
@@ -1035,6 +1120,17 @@ lpfc_debugfs_release(struct inode *inode, struct file *file)
return 0;
}
+static int
+lpfc_debugfs_dumpDataDif_release(struct inode *inode, struct file *file)
+{
+ struct lpfc_debug *debug = file->private_data;
+
+ debug->buffer = NULL;
+ kfree(debug);
+
+ return 0;
+}
+
#undef lpfc_debugfs_op_disc_trc
static struct file_operations lpfc_debugfs_op_disc_trc = {
.owner = THIS_MODULE,
@@ -1080,6 +1176,26 @@ static struct file_operations lpfc_debugfs_op_dumpHostSlim = {
.release = lpfc_debugfs_release,
};
+#undef lpfc_debugfs_op_dumpData
+static struct file_operations lpfc_debugfs_op_dumpData = {
+ .owner = THIS_MODULE,
+ .open = lpfc_debugfs_dumpData_open,
+ .llseek = lpfc_debugfs_lseek,
+ .read = lpfc_debugfs_read,
+ .write = lpfc_debugfs_dumpDataDif_write,
+ .release = lpfc_debugfs_dumpDataDif_release,
+};
+
+#undef lpfc_debugfs_op_dumpDif
+static struct file_operations lpfc_debugfs_op_dumpDif = {
+ .owner = THIS_MODULE,
+ .open = lpfc_debugfs_dumpDif_open,
+ .llseek = lpfc_debugfs_lseek,
+ .read = lpfc_debugfs_read,
+ .write = lpfc_debugfs_dumpDataDif_write,
+ .release = lpfc_debugfs_dumpDataDif_release,
+};
+
#undef lpfc_debugfs_op_slow_ring_trc
static struct file_operations lpfc_debugfs_op_slow_ring_trc = {
.owner = THIS_MODULE,
@@ -1176,6 +1292,32 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
goto debug_failed;
}
+ /* Setup dumpData */
+ snprintf(name, sizeof(name), "dumpData");
+ phba->debug_dumpData =
+ debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+ phba->hba_debugfs_root,
+ phba, &lpfc_debugfs_op_dumpData);
+ if (!phba->debug_dumpData) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+ "0800 Cannot create debugfs dumpData\n");
+ goto debug_failed;
+ }
+
+ /* Setup dumpDif */
+ snprintf(name, sizeof(name), "dumpDif");
+ phba->debug_dumpDif =
+ debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+ phba->hba_debugfs_root,
+ phba, &lpfc_debugfs_op_dumpDif);
+ if (!phba->debug_dumpDif) {
+ lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+ "0801 Cannot create debugfs dumpDif\n");
+ goto debug_failed;
+ }
+
+
+
/* Setup slow ring trace */
if (lpfc_debugfs_max_slow_ring_trc) {
num = lpfc_debugfs_max_slow_ring_trc - 1;
@@ -1340,6 +1482,16 @@ lpfc_debugfs_terminate(struct lpfc_vport *vport)
debugfs_remove(phba->debug_dumpHostSlim); /* HostSlim */
phba->debug_dumpHostSlim = NULL;
}
+ if (phba->debug_dumpData) {
+ debugfs_remove(phba->debug_dumpData); /* dumpData */
+ phba->debug_dumpData = NULL;
+ }
+
+ if (phba->debug_dumpDif) {
+ debugfs_remove(phba->debug_dumpDif); /* dumpDif */
+ phba->debug_dumpDif = NULL;
+ }
+
if (phba->slow_ring_trc) {
kfree(phba->slow_ring_trc);
phba->slow_ring_trc = NULL;