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OpenCloudOS-Kernel/drivers/scsi/fnic/fnic_main.c

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/*
* Copyright 2008 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#include <linux/mempool.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/skbuff.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/if_ether.h>
#include <scsi/fc/fc_fip.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
#include <scsi/scsi_tcq.h>
#include <scsi/libfc.h>
#include <scsi/fc_frame.h>
#include "vnic_dev.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "fnic_io.h"
#include "fnic_fip.h"
#include "fnic.h"
#define PCI_DEVICE_ID_CISCO_FNIC 0x0045
/* Timer to poll notification area for events. Used for MSI interrupts */
#define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)
static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
static struct kmem_cache *fnic_io_req_cache;
LIST_HEAD(fnic_list);
DEFINE_SPINLOCK(fnic_list_lock);
/* Supported devices by fnic module */
static struct pci_device_id fnic_id_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
{ 0, }
};
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
"Joseph R. Eykholt <jeykholt@cisco.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(DRV_VERSION);
MODULE_DEVICE_TABLE(pci, fnic_id_table);
unsigned int fnic_log_level;
module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
unsigned int fnic_trace_max_pages = 16;
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");
unsigned int fnic_fc_trace_max_pages = 64;
module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fnic_fc_trace_max_pages,
"Total allocated memory pages for fc 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,
.fcp_abort_io = fnic_empty_scsi_cleanup,
.fcp_cleanup = fnic_empty_scsi_cleanup,
.exch_mgr_reset = fnic_exch_mgr_reset
};
static int fnic_slave_alloc(struct scsi_device *sdev)
{
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
scsi_change_queue_depth(sdev, fnic_max_qdepth);
return 0;
}
static struct scsi_host_template fnic_host_template = {
.module = THIS_MODULE,
.name = DRV_NAME,
.queuecommand = fnic_queuecommand,
.eh_timed_out = fc_eh_timed_out,
.eh_abort_handler = fnic_abort_cmd,
.eh_device_reset_handler = fnic_device_reset,
.eh_host_reset_handler = fnic_host_reset,
.slave_alloc = fnic_slave_alloc,
.change_queue_depth = scsi_change_queue_depth,
.this_id = -1,
.cmd_per_lun = 3,
.can_queue = FNIC_DFLT_IO_REQ,
.use_clustering = ENABLE_CLUSTERING,
.sg_tablesize = FNIC_MAX_SG_DESC_CNT,
.max_sectors = 0xffff,
.shost_attrs = fnic_attrs,
.track_queue_depth = 1,
};
static void
fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
{
if (timeout)
rport->dev_loss_tmo = timeout;
else
rport->dev_loss_tmo = 1;
}
static void fnic_get_host_speed(struct Scsi_Host *shost);
static struct scsi_transport_template *fnic_fc_transport;
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
static void fnic_reset_host_stats(struct Scsi_Host *);
static struct fc_function_template fnic_fc_functions = {
.show_host_node_name = 1,
.show_host_port_name = 1,
.show_host_supported_classes = 1,
.show_host_supported_fc4s = 1,
.show_host_active_fc4s = 1,
.show_host_maxframe_size = 1,
.show_host_port_id = 1,
.show_host_supported_speeds = 1,
.get_host_speed = fnic_get_host_speed,
.show_host_speed = 1,
.show_host_port_type = 1,
.get_host_port_state = fc_get_host_port_state,
.show_host_port_state = 1,
.show_host_symbolic_name = 1,
.show_rport_maxframe_size = 1,
.show_rport_supported_classes = 1,
.show_host_fabric_name = 1,
.show_starget_node_name = 1,
.show_starget_port_name = 1,
.show_starget_port_id = 1,
.show_rport_dev_loss_tmo = 1,
.set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
.issue_fc_host_lip = fnic_reset,
.get_fc_host_stats = fnic_get_stats,
.reset_fc_host_stats = fnic_reset_host_stats,
.dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
.terminate_rport_io = fnic_terminate_rport_io,
.bsg_request = fc_lport_bsg_request,
};
static void fnic_get_host_speed(struct Scsi_Host *shost)
{
struct fc_lport *lp = shost_priv(shost);
struct fnic *fnic = lport_priv(lp);
u32 port_speed = vnic_dev_port_speed(fnic->vdev);
/* Add in other values as they get defined in fw */
switch (port_speed) {
case DCEM_PORTSPEED_10G:
fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
break;
case DCEM_PORTSPEED_25G:
fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
break;
case DCEM_PORTSPEED_40G:
case DCEM_PORTSPEED_4x10G:
fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
break;
case DCEM_PORTSPEED_100G:
fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
break;
default:
fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
break;
}
}
static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
{
int ret;
struct fc_lport *lp = shost_priv(host);
struct fnic *fnic = lport_priv(lp);
struct fc_host_statistics *stats = &lp->host_stats;
struct vnic_stats *vs;
unsigned long flags;
if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
return stats;
fnic->stats_time = jiffies;
spin_lock_irqsave(&fnic->fnic_lock, flags);
ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if (ret) {
FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
"fnic: Get vnic stats failed"
" 0x%x", ret);
return stats;
}
vs = fnic->stats;
stats->tx_frames = vs->tx.tx_unicast_frames_ok;
stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
stats->rx_frames = vs->rx.rx_unicast_frames_ok;
stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
stats->invalid_crc_count = vs->rx.rx_crc_errors;
stats->seconds_since_last_reset =
(jiffies - fnic->stats_reset_time) / HZ;
stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
return stats;
}
/*
* fnic_dump_fchost_stats
* note : dumps fc_statistics into system logs
*/
void fnic_dump_fchost_stats(struct Scsi_Host *host,
struct fc_host_statistics *stats)
{
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: seconds since last reset = %llu\n",
stats->seconds_since_last_reset);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: tx frames = %llu\n",
stats->tx_frames);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: tx words = %llu\n",
stats->tx_words);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: rx frames = %llu\n",
stats->rx_frames);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: rx words = %llu\n",
stats->rx_words);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: lip count = %llu\n",
stats->lip_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: nos count = %llu\n",
stats->nos_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: error frames = %llu\n",
stats->error_frames);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: dumped frames = %llu\n",
stats->dumped_frames);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: link failure count = %llu\n",
stats->link_failure_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: loss of sync count = %llu\n",
stats->loss_of_sync_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: loss of signal count = %llu\n",
stats->loss_of_signal_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: prim seq protocol err count = %llu\n",
stats->prim_seq_protocol_err_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: invalid tx word count= %llu\n",
stats->invalid_tx_word_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: invalid crc count = %llu\n",
stats->invalid_crc_count);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: fcp input requests = %llu\n",
stats->fcp_input_requests);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: fcp output requests = %llu\n",
stats->fcp_output_requests);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: fcp control requests = %llu\n",
stats->fcp_control_requests);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: fcp input megabytes = %llu\n",
stats->fcp_input_megabytes);
FNIC_MAIN_NOTE(KERN_NOTICE, host,
"fnic: fcp output megabytes = %llu\n",
stats->fcp_output_megabytes);
return;
}
/*
* fnic_reset_host_stats : clears host stats
* note : called when reset_statistics set under sysfs dir
*/
static void fnic_reset_host_stats(struct Scsi_Host *host)
{
int ret;
struct fc_lport *lp = shost_priv(host);
struct fnic *fnic = lport_priv(lp);
struct fc_host_statistics *stats;
unsigned long flags;
/* dump current stats, before clearing them */
stats = fnic_get_stats(host);
fnic_dump_fchost_stats(host, stats);
spin_lock_irqsave(&fnic->fnic_lock, flags);
ret = vnic_dev_stats_clear(fnic->vdev);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if (ret) {
FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
"fnic: Reset vnic stats failed"
" 0x%x", ret);
return;
}
fnic->stats_reset_time = jiffies;
memset(stats, 0, sizeof(*stats));
return;
}
void fnic_log_q_error(struct fnic *fnic)
{
unsigned int i;
u32 error_status;
for (i = 0; i < fnic->raw_wq_count; i++) {
error_status = ioread32(&fnic->wq[i].ctrl->error_status);
if (error_status)
shost_printk(KERN_ERR, fnic->lport->host,
"WQ[%d] error_status"
" %d\n", i, error_status);
}
for (i = 0; i < fnic->rq_count; i++) {
error_status = ioread32(&fnic->rq[i].ctrl->error_status);
if (error_status)
shost_printk(KERN_ERR, fnic->lport->host,
"RQ[%d] error_status"
" %d\n", i, error_status);
}
for (i = 0; i < fnic->wq_copy_count; i++) {
error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
if (error_status)
shost_printk(KERN_ERR, fnic->lport->host,
"CWQ[%d] error_status"
" %d\n", i, error_status);
}
}
void fnic_handle_link_event(struct fnic *fnic)
{
unsigned long flags;
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->stop_rx_link_events) {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
queue_work(fnic_event_queue, &fnic->link_work);
}
static int fnic_notify_set(struct fnic *fnic)
{
int err;
switch (vnic_dev_get_intr_mode(fnic->vdev)) {
case VNIC_DEV_INTR_MODE_INTX:
err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
break;
case VNIC_DEV_INTR_MODE_MSI:
err = vnic_dev_notify_set(fnic->vdev, -1);
break;
case VNIC_DEV_INTR_MODE_MSIX:
err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
break;
default:
shost_printk(KERN_ERR, fnic->lport->host,
"Interrupt mode should be set up"
" before devcmd notify set %d\n",
vnic_dev_get_intr_mode(fnic->vdev));
err = -1;
break;
}
return err;
}
static void fnic_notify_timer(struct timer_list *t)
{
struct fnic *fnic = from_timer(fnic, t, notify_timer);
fnic_handle_link_event(fnic);
mod_timer(&fnic->notify_timer,
round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
}
static void fnic_fip_notify_timer(struct timer_list *t)
{
struct fnic *fnic = from_timer(fnic, t, fip_timer);
fnic_handle_fip_timer(fnic);
}
static void fnic_notify_timer_start(struct fnic *fnic)
{
switch (vnic_dev_get_intr_mode(fnic->vdev)) {
case VNIC_DEV_INTR_MODE_MSI:
/*
* Schedule first timeout immediately. The driver is
* initiatialized and ready to look for link up notification
*/
mod_timer(&fnic->notify_timer, jiffies);
break;
default:
/* Using intr for notification for INTx/MSI-X */
break;
};
}
static int fnic_dev_wait(struct vnic_dev *vdev,
int (*start)(struct vnic_dev *, int),
int (*finished)(struct vnic_dev *, int *),
int arg)
{
unsigned long time;
int done;
int err;
int count;
count = 0;
err = start(vdev, arg);
if (err)
return err;
/* Wait for func to complete.
* Sometime schedule_timeout_uninterruptible take long time
* to wake up so we do not retry as we are only waiting for
* 2 seconds in while loop. By adding count, we make sure
* we try atleast three times before returning -ETIMEDOUT
*/
time = jiffies + (HZ * 2);
do {
err = finished(vdev, &done);
count++;
if (err)
return err;
if (done)
return 0;
schedule_timeout_uninterruptible(HZ / 10);
} while (time_after(time, jiffies) || (count < 3));
return -ETIMEDOUT;
}
static int fnic_cleanup(struct fnic *fnic)
{
unsigned int i;
int err;
vnic_dev_disable(fnic->vdev);
for (i = 0; i < fnic->intr_count; i++)
vnic_intr_mask(&fnic->intr[i]);
for (i = 0; i < fnic->rq_count; i++) {
err = vnic_rq_disable(&fnic->rq[i]);
if (err)
return err;
}
for (i = 0; i < fnic->raw_wq_count; i++) {
err = vnic_wq_disable(&fnic->wq[i]);
if (err)
return err;
}
for (i = 0; i < fnic->wq_copy_count; i++) {
err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
if (err)
return err;
}
/* Clean up completed IOs and FCS frames */
fnic_wq_copy_cmpl_handler(fnic, -1);
fnic_wq_cmpl_handler(fnic, -1);
fnic_rq_cmpl_handler(fnic, -1);
/* Clean up the IOs and FCS frames that have not completed */
for (i = 0; i < fnic->raw_wq_count; i++)
vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
for (i = 0; i < fnic->rq_count; i++)
vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
for (i = 0; i < fnic->wq_copy_count; i++)
vnic_wq_copy_clean(&fnic->wq_copy[i],
fnic_wq_copy_cleanup_handler);
for (i = 0; i < fnic->cq_count; i++)
vnic_cq_clean(&fnic->cq[i]);
for (i = 0; i < fnic->intr_count; i++)
vnic_intr_clean(&fnic->intr[i]);
mempool_destroy(fnic->io_req_pool);
for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
mempool_destroy(fnic->io_sgl_pool[i]);
return 0;
}
static void fnic_iounmap(struct fnic *fnic)
{
if (fnic->bar0.vaddr)
iounmap(fnic->bar0.vaddr);
}
/**
* fnic_get_mac() - get assigned data MAC address for FIP code.
* @lport: local port.
*/
static u8 *fnic_get_mac(struct fc_lport *lport)
{
struct fnic *fnic = lport_priv(lport);
return fnic->data_src_addr;
}
static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
{
u16 old_vlan;
old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
}
static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct Scsi_Host *host;
struct fc_lport *lp;
struct fnic *fnic;
mempool_t *pool;
int err;
int i;
unsigned long flags;
/*
* Allocate SCSI Host and set up association between host,
* local port, and fnic
*/
lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
if (!lp) {
printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
err = -ENOMEM;
goto err_out;
}
host = lp->host;
fnic = lport_priv(lp);
fnic->lport = lp;
fnic->ctlr.lp = lp;
snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
host->host_no);
host->transportt = fnic_fc_transport;
err = fnic_stats_debugfs_init(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Failed to initialize debugfs for stats\n");
fnic_stats_debugfs_remove(fnic);
}
/* Setup PCI resources */
pci_set_drvdata(pdev, fnic);
fnic->pdev = pdev;
err = pci_enable_device(pdev);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Cannot enable PCI device, aborting.\n");
goto err_out_free_hba;
}
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Cannot enable PCI resources, aborting\n");
goto err_out_disable_device;
}
pci_set_master(pdev);
/* Query PCI controller on system for DMA addressing
* limitation for the device. Try 64-bit first, and
* fail to 32-bit.
*/
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"No usable DMA configuration "
"aborting\n");
goto err_out_release_regions;
}
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Unable to obtain 32-bit DMA "
"for consistent allocations, aborting.\n");
goto err_out_release_regions;
}
} else {
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Unable to obtain 64-bit DMA "
"for consistent allocations, aborting.\n");
goto err_out_release_regions;
}
}
/* Map vNIC resources from BAR0 */
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
shost_printk(KERN_ERR, fnic->lport->host,
"BAR0 not memory-map'able, aborting.\n");
err = -ENODEV;
goto err_out_release_regions;
}
fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
fnic->bar0.len = pci_resource_len(pdev, 0);
if (!fnic->bar0.vaddr) {
shost_printk(KERN_ERR, fnic->lport->host,
"Cannot memory-map BAR0 res hdr, "
"aborting.\n");
err = -ENODEV;
goto err_out_release_regions;
}
fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
if (!fnic->vdev) {
shost_printk(KERN_ERR, fnic->lport->host,
"vNIC registration failed, "
"aborting.\n");
err = -ENODEV;
goto err_out_iounmap;
}
err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
vnic_dev_open_done, 0);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"vNIC dev open failed, aborting.\n");
goto err_out_vnic_unregister;
}
err = vnic_dev_init(fnic->vdev, 0);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"vNIC dev init failed, aborting.\n");
goto err_out_dev_close;
}
err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"vNIC get MAC addr failed \n");
goto err_out_dev_close;
}
/* set data_src for point-to-point mode and to keep it non-zero */
memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
/* Get vNIC configuration */
err = fnic_get_vnic_config(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Get vNIC configuration failed, "
"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;
host->max_lun = fnic->config.luns_per_tgt;
host->max_id = FNIC_MAX_FCP_TARGET;
host->max_cmd_len = FCOE_MAX_CMD_LEN;
fnic_get_res_counts(fnic);
err = fnic_set_intr_mode(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Failed to set intr mode, "
"aborting.\n");
goto err_out_dev_close;
}
err = fnic_alloc_vnic_resources(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Failed to alloc vNIC resources, "
"aborting.\n");
goto err_out_clear_intr;
}
/* initialize all fnic locks */
spin_lock_init(&fnic->fnic_lock);
for (i = 0; i < FNIC_WQ_MAX; i++)
spin_lock_init(&fnic->wq_lock[i]);
for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
spin_lock_init(&fnic->wq_copy_lock[i]);
fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
fnic->fw_ack_recd[i] = 0;
fnic->fw_ack_index[i] = -1;
}
for (i = 0; i < FNIC_IO_LOCKS; i++)
spin_lock_init(&fnic->io_req_lock[i]);
fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
if (!fnic->io_req_pool)
goto err_out_free_resources;
pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
if (!pool)
goto err_out_free_ioreq_pool;
fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
if (!pool)
goto err_out_free_dflt_pool;
fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
/* setup vlan config, hw inserts vlan header */
fnic->vlan_hw_insert = 1;
fnic->vlan_id = 0;
/* Initialize the FIP fcoe_ctrl struct */
fnic->ctlr.send = fnic_eth_send;
fnic->ctlr.update_mac = fnic_update_mac;
fnic->ctlr.get_src_addr = fnic_get_mac;
if (fnic->config.flags & VFCF_FIP_CAPABLE) {
shost_printk(KERN_INFO, fnic->lport->host,
"firmware supports FIP\n");
/* enable directed and multicast */
vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
fnic->set_vlan = fnic_set_vlan;
fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
spin_lock_init(&fnic->vlans_lock);
INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
INIT_WORK(&fnic->event_work, fnic_handle_event);
skb_queue_head_init(&fnic->fip_frame_queue);
INIT_LIST_HEAD(&fnic->evlist);
INIT_LIST_HEAD(&fnic->vlans);
} else {
shost_printk(KERN_INFO, fnic->lport->host,
"firmware uses non-FIP mode\n");
fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
fnic->ctlr.state = FIP_ST_NON_FIP;
}
fnic->state = FNIC_IN_FC_MODE;
atomic_set(&fnic->in_flight, 0);
fnic->state_flags = FNIC_FLAGS_NONE;
/* Enable hardware stripping of vlan header on ingress */
fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
/* Setup notification buffer area */
err = fnic_notify_set(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Failed to alloc notify buffer, aborting.\n");
goto err_out_free_max_pool;
}
/* Setup notify timer when using MSI interrupts */
if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);
/* allocate RQ buffers and post them to RQ*/
for (i = 0; i < fnic->rq_count; i++) {
err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"fnic_alloc_rq_frame can't alloc "
"frame\n");
goto err_out_free_rq_buf;
}
}
/*
* Initialization done with PCI system, hardware, firmware.
* Add host to SCSI
*/
err = scsi_add_host(lp->host, &pdev->dev);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"fnic: scsi_add_host failed...exiting\n");
goto err_out_free_rq_buf;
}
/* Start local port initiatialization */
lp->link_up = 0;
lp->max_retry_count = fnic->config.flogi_retries;
lp->max_rport_retry_count = fnic->config.plogi_retries;
lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
FCP_SPPF_CONF_COMPL);
if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
lp->service_params |= FCP_SPPF_RETRY;
lp->boot_time = jiffies;
lp->e_d_tov = fnic->config.ed_tov;
lp->r_a_tov = fnic->config.ra_tov;
lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
fc_set_wwnn(lp, fnic->config.node_wwn);
fc_set_wwpn(lp, fnic->config.port_wwn);
fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
FCPIO_HOST_EXCH_RANGE_END, NULL)) {
err = -ENOMEM;
goto err_out_remove_scsi_host;
}
fc_lport_init_stats(lp);
fnic->stats_reset_time = jiffies;
fc_lport_config(lp);
if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
sizeof(struct fc_frame_header))) {
err = -EINVAL;
goto err_out_free_exch_mgr;
}
fc_host_maxframe_size(lp->host) = lp->mfs;
fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
sprintf(fc_host_symbolic_name(lp->host),
DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
spin_lock_irqsave(&fnic_list_lock, flags);
list_add_tail(&fnic->list, &fnic_list);
spin_unlock_irqrestore(&fnic_list_lock, flags);
INIT_WORK(&fnic->link_work, fnic_handle_link);
INIT_WORK(&fnic->frame_work, fnic_handle_frame);
skb_queue_head_init(&fnic->frame_queue);
skb_queue_head_init(&fnic->tx_queue);
/* Enable all queues */
for (i = 0; i < fnic->raw_wq_count; i++)
vnic_wq_enable(&fnic->wq[i]);
for (i = 0; i < fnic->rq_count; i++)
vnic_rq_enable(&fnic->rq[i]);
for (i = 0; i < fnic->wq_copy_count; i++)
vnic_wq_copy_enable(&fnic->wq_copy[i]);
fc_fabric_login(lp);
vnic_dev_enable(fnic->vdev);
err = fnic_request_intr(fnic);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"Unable to request irq.\n");
goto err_out_free_exch_mgr;
}
for (i = 0; i < fnic->intr_count; i++)
vnic_intr_unmask(&fnic->intr[i]);
fnic_notify_timer_start(fnic);
return 0;
err_out_free_exch_mgr:
fc_exch_mgr_free(lp);
err_out_remove_scsi_host:
fc_remove_host(lp->host);
scsi_remove_host(lp->host);
err_out_free_rq_buf:
for (i = 0; i < fnic->rq_count; i++)
vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
vnic_dev_notify_unset(fnic->vdev);
err_out_free_max_pool:
mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
err_out_free_dflt_pool:
mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
err_out_free_ioreq_pool:
mempool_destroy(fnic->io_req_pool);
err_out_free_resources:
fnic_free_vnic_resources(fnic);
err_out_clear_intr:
fnic_clear_intr_mode(fnic);
err_out_dev_close:
vnic_dev_close(fnic->vdev);
err_out_vnic_unregister:
vnic_dev_unregister(fnic->vdev);
err_out_iounmap:
fnic_iounmap(fnic);
err_out_release_regions:
pci_release_regions(pdev);
err_out_disable_device:
pci_disable_device(pdev);
err_out_free_hba:
fnic_stats_debugfs_remove(fnic);
scsi_host_put(lp->host);
err_out:
return err;
}
static void fnic_remove(struct pci_dev *pdev)
{
struct fnic *fnic = pci_get_drvdata(pdev);
struct fc_lport *lp = fnic->lport;
unsigned long flags;
/*
* Mark state so that the workqueue thread stops forwarding
* received frames and link events to the local port. ISR and
* other threads that can queue work items will also stop
* creating work items on the fnic workqueue
*/
spin_lock_irqsave(&fnic->fnic_lock, flags);
fnic->stop_rx_link_events = 1;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
del_timer_sync(&fnic->notify_timer);
/*
* Flush the fnic event queue. After this call, there should
* be no event queued for this fnic device in the workqueue
*/
flush_workqueue(fnic_event_queue);
skb_queue_purge(&fnic->frame_queue);
skb_queue_purge(&fnic->tx_queue);
if (fnic->config.flags & VFCF_FIP_CAPABLE) {
del_timer_sync(&fnic->fip_timer);
skb_queue_purge(&fnic->fip_frame_queue);
fnic_fcoe_reset_vlans(fnic);
fnic_fcoe_evlist_free(fnic);
}
/*
* Log off the fabric. This stops all remote ports, dns port,
* logs off the fabric. This flushes all rport, disc, lport work
* before returning
*/
fc_fabric_logoff(fnic->lport);
spin_lock_irqsave(&fnic->fnic_lock, flags);
fnic->in_remove = 1;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
fcoe_ctlr_destroy(&fnic->ctlr);
fc_lport_destroy(lp);
fnic_stats_debugfs_remove(fnic);
/*
* This stops the fnic device, masks all interrupts. Completed
* CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
* cleaned up
*/
fnic_cleanup(fnic);
BUG_ON(!skb_queue_empty(&fnic->frame_queue));
BUG_ON(!skb_queue_empty(&fnic->tx_queue));
spin_lock_irqsave(&fnic_list_lock, flags);
list_del(&fnic->list);
spin_unlock_irqrestore(&fnic_list_lock, flags);
fc_remove_host(fnic->lport->host);
scsi_remove_host(fnic->lport->host);
fc_exch_mgr_free(fnic->lport);
vnic_dev_notify_unset(fnic->vdev);
fnic_free_intr(fnic);
fnic_free_vnic_resources(fnic);
fnic_clear_intr_mode(fnic);
vnic_dev_close(fnic->vdev);
vnic_dev_unregister(fnic->vdev);
fnic_iounmap(fnic);
pci_release_regions(pdev);
pci_disable_device(pdev);
scsi_host_put(lp->host);
}
static struct pci_driver fnic_driver = {
.name = DRV_NAME,
.id_table = fnic_id_table,
.probe = fnic_probe,
.remove = fnic_remove,
};
static int __init fnic_init_module(void)
{
size_t len;
int err = 0;
printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
/* Create debugfs entries for fnic */
err = fnic_debugfs_init();
if (err < 0) {
printk(KERN_ERR PFX "Failed to create fnic directory "
"for tracing and stats logging\n");
fnic_debugfs_terminate();
}
/* Allocate memory for trace buffer */
err = fnic_trace_buf_init();
if (err < 0) {
printk(KERN_ERR PFX
"Trace buffer initialization Failed. "
"Fnic Tracing utility is disabled\n");
fnic_trace_free();
}
/* Allocate memory for fc trace buffer */
err = fnic_fc_trace_init();
if (err < 0) {
printk(KERN_ERR PFX "FC trace buffer initialization Failed "
"FC frame tracing utility is disabled\n");
fnic_fc_trace_free();
}
/* Create a cache for allocation of default size sgls */
len = sizeof(struct fnic_dflt_sgl_list);
fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
SLAB_HWCACHE_ALIGN,
NULL);
if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
err = -ENOMEM;
goto err_create_fnic_sgl_slab_dflt;
}
/* Create a cache for allocation of max size sgls*/
len = sizeof(struct fnic_sgl_list);
fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
SLAB_HWCACHE_ALIGN,
NULL);
if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
err = -ENOMEM;
goto err_create_fnic_sgl_slab_max;
}
/* Create a cache of io_req structs for use via mempool */
fnic_io_req_cache = kmem_cache_create("fnic_io_req",
sizeof(struct fnic_io_req),
0, SLAB_HWCACHE_ALIGN, NULL);
if (!fnic_io_req_cache) {
printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
err = -ENOMEM;
goto err_create_fnic_ioreq_slab;
}
fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
if (!fnic_event_queue) {
printk(KERN_ERR PFX "fnic work queue create failed\n");
err = -ENOMEM;
goto err_create_fnic_workq;
}
spin_lock_init(&fnic_list_lock);
INIT_LIST_HEAD(&fnic_list);
fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
if (!fnic_fip_queue) {
printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
err = -ENOMEM;
goto err_create_fip_workq;
}
fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
if (!fnic_fc_transport) {
printk(KERN_ERR PFX "fc_attach_transport error\n");
err = -ENOMEM;
goto err_fc_transport;
}
/* register the driver with PCI system */
err = pci_register_driver(&fnic_driver);
if (err < 0) {
printk(KERN_ERR PFX "pci register error\n");
goto err_pci_register;
}
return err;
err_pci_register:
fc_release_transport(fnic_fc_transport);
err_fc_transport:
destroy_workqueue(fnic_fip_queue);
err_create_fip_workq:
destroy_workqueue(fnic_event_queue);
err_create_fnic_workq:
kmem_cache_destroy(fnic_io_req_cache);
err_create_fnic_ioreq_slab:
kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
err_create_fnic_sgl_slab_max:
kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
err_create_fnic_sgl_slab_dflt:
fnic_trace_free();
fnic_fc_trace_free();
fnic_debugfs_terminate();
return err;
}
static void __exit fnic_cleanup_module(void)
{
pci_unregister_driver(&fnic_driver);
destroy_workqueue(fnic_event_queue);
if (fnic_fip_queue) {
flush_workqueue(fnic_fip_queue);
destroy_workqueue(fnic_fip_queue);
}
kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
kmem_cache_destroy(fnic_io_req_cache);
fc_release_transport(fnic_fc_transport);
fnic_trace_free();
fnic_fc_trace_free();
fnic_debugfs_terminate();
}
module_init(fnic_init_module);
module_exit(fnic_cleanup_module);
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