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[SCSI] lpfc 8.3.0 : Add BlockGuard support (T10-DIF) code
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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>
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James Smart authored and James Bottomley committed Dec 29, 2008
1 parent 81301a9 commit e2a0a9d
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Showing 5 changed files with 1,026 additions and 17 deletions.
152 changes: 152 additions & 0 deletions drivers/scsi/lpfc/lpfc_debugfs.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -907,6 +907,91 @@ lpfc_debugfs_dumpHostSlim_open(struct inode *inode, struct file *file)
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.
Expand Down Expand Up @@ -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,
Expand Down Expand Up @@ -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,
Expand Down Expand Up @@ -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;
Expand Down Expand Up @@ -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;
Expand Down
2 changes: 2 additions & 0 deletions drivers/scsi/lpfc/lpfc_mbox.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1099,6 +1099,8 @@ lpfc_config_port(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
/* If HBA supports SLI=3 ask for it */

if (phba->sli_rev == 3 && phba->vpd.sli3Feat.cerbm) {
if (phba->cfg_enable_bg)
mb->un.varCfgPort.cbg = 1; /* configure BlockGuard */
mb->un.varCfgPort.cerbm = 1; /* Request HBQs */
mb->un.varCfgPort.ccrp = 1; /* Command Ring Polling */
mb->un.varCfgPort.cinb = 1; /* Interrupt Notification Block */
Expand Down
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