Commit fc85799e authored by Hiral Patel's avatar Hiral Patel Committed by James Bottomley
Browse files

[SCSI] fnic: fnic Driver Tuneables Exposed through CLI



Introduced module params to provide dynamic way of configuring
queue depth.

Added support to get max io throttle count through UCSM to
configure maximum outstanding IOs supported by fnic and push
that value to scsi mid-layer.

  Supported IO throttle values:

  UCSM IO THROTTLE VALUE        FNIC MAX OUTSTANDING IOS
  ------------------------------------------------------
        16 (Default)                    2048
        <= 256                          256
        > 256                           <ucsm value>

Signed-off-by: default avatarHiral Patel <hiralpat@cisco.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent d0385d92
......@@ -43,6 +43,8 @@
#define DFX DRV_NAME "%d: "
#define DESC_CLEAN_LOW_WATERMARK 8
#define FNIC_UCSM_DFLT_THROTTLE_CNT_BLD 16 /* UCSM default throttle count */
#define FNIC_MIN_IO_REQ 256 /* Min IO throttle count */
#define FNIC_MAX_IO_REQ 2048 /* scsi_cmnd tag map entries */
#define FNIC_IO_LOCKS 64 /* IO locks: power of 2 */
#define FNIC_DFLT_QUEUE_DEPTH 32
......@@ -223,6 +225,7 @@ struct fnic {
char name[IFNAMSIZ];
struct timer_list notify_timer; /* used for MSI interrupts */
unsigned int fnic_max_tag_id;
unsigned int err_intr_offset;
unsigned int link_intr_offset;
......
......@@ -74,6 +74,10 @@ module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
"for fnic trace buffer");
static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
static struct libfc_function_template fnic_transport_template = {
.frame_send = fnic_send,
.lport_set_port_id = fnic_set_port_id,
......@@ -91,7 +95,7 @@ static int fnic_slave_alloc(struct scsi_device *sdev)
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
scsi_activate_tcq(sdev, fnic_max_qdepth);
return 0;
}
......@@ -552,13 +556,6 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
host->transportt = fnic_fc_transport;
err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Unable to alloc shared tag map\n");
goto err_out_free_hba;
}
/* Setup PCI resources */
pci_set_drvdata(pdev, fnic);
......@@ -671,6 +668,22 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
"aborting.\n");
goto err_out_dev_close;
}
/* Configure Maximum Outstanding IO reqs*/
if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
max_t(u32, FNIC_MIN_IO_REQ,
fnic->config.io_throttle_count));
}
fnic->fnic_max_tag_id = host->can_queue;
err = scsi_init_shared_tag_map(host, fnic->fnic_max_tag_id);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Unable to alloc shared tag map\n");
goto err_out_dev_close;
}
host->max_lun = fnic->config.luns_per_tgt;
host->max_id = FNIC_MAX_FCP_TARGET;
host->max_cmd_len = FCOE_MAX_CMD_LEN;
......
......@@ -736,7 +736,7 @@ static void fnic_fcpio_icmnd_cmpl_handler(struct fnic *fnic,
fcpio_tag_id_dec(&tag, &id);
icmnd_cmpl = &desc->u.icmnd_cmpl;
if (id >= FNIC_MAX_IO_REQ) {
if (id >= fnic->fnic_max_tag_id) {
shost_printk(KERN_ERR, fnic->lport->host,
"Tag out of range tag %x hdr status = %s\n",
id, fnic_fcpio_status_to_str(hdr_status));
......@@ -913,7 +913,7 @@ static void fnic_fcpio_itmf_cmpl_handler(struct fnic *fnic,
fcpio_header_dec(&desc->hdr, &type, &hdr_status, &tag);
fcpio_tag_id_dec(&tag, &id);
if ((id & FNIC_TAG_MASK) >= FNIC_MAX_IO_REQ) {
if ((id & FNIC_TAG_MASK) >= fnic->fnic_max_tag_id) {
shost_printk(KERN_ERR, fnic->lport->host,
"Tag out of range tag %x hdr status = %s\n",
id, fnic_fcpio_status_to_str(hdr_status));
......@@ -1127,7 +1127,7 @@ static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
spinlock_t *io_lock;
unsigned long start_time = 0;
for (i = 0; i < FNIC_MAX_IO_REQ; i++) {
for (i = 0; i < fnic->fnic_max_tag_id; i++) {
if (i == exclude_id)
continue;
......@@ -1210,7 +1210,7 @@ void fnic_wq_copy_cleanup_handler(struct vnic_wq_copy *wq,
fcpio_tag_id_dec(&desc->hdr.tag, &id);
id &= FNIC_TAG_MASK;
if (id >= FNIC_MAX_IO_REQ)
if (id >= fnic->fnic_max_tag_id)
return;
sc = scsi_host_find_tag(fnic->lport->host, id);
......@@ -1314,7 +1314,7 @@ static void fnic_rport_exch_reset(struct fnic *fnic, u32 port_id)
if (fnic->in_remove)
return;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
abt_tag = tag;
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
......@@ -1448,7 +1448,7 @@ void fnic_terminate_rport_io(struct fc_rport *rport)
if (fnic->in_remove)
return;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
abt_tag = tag;
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
......@@ -1781,7 +1781,7 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
DECLARE_COMPLETION_ONSTACK(tm_done);
enum fnic_ioreq_state old_ioreq_state;
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
io_lock = fnic_io_lock_tag(fnic, tag);
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, tag);
......@@ -2404,7 +2404,7 @@ int fnic_is_abts_pending(struct fnic *fnic, struct scsi_cmnd *lr_sc)
lun_dev = lr_sc->device;
/* walk again to check, if IOs are still pending in fw */
for (tag = 0; tag < FNIC_MAX_IO_REQ; tag++) {
for (tag = 0; tag < fnic->fnic_max_tag_id; tag++) {
sc = scsi_host_find_tag(fnic->lport->host, tag);
/*
* ignore this lun reset cmd or cmds that do not belong to
......
......@@ -54,8 +54,8 @@
#define VNIC_FNIC_PLOGI_TIMEOUT_MIN 1000
#define VNIC_FNIC_PLOGI_TIMEOUT_MAX 255000
#define VNIC_FNIC_IO_THROTTLE_COUNT_MIN 256
#define VNIC_FNIC_IO_THROTTLE_COUNT_MAX 4096
#define VNIC_FNIC_IO_THROTTLE_COUNT_MIN 1
#define VNIC_FNIC_IO_THROTTLE_COUNT_MAX 2048
#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MIN 0
#define VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX 240000
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment