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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2008 Cisco Systems, Inc. All rights reserved.4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.5 */6#include <linux/module.h>7#include <linux/mempool.h>8#include <linux/string.h>9#include <linux/slab.h>10#include <linux/errno.h>11#include <linux/init.h>12#include <linux/pci.h>13#include <linux/skbuff.h>14#include <linux/interrupt.h>15#include <linux/irq.h>16#include <linux/spinlock.h>17#include <linux/workqueue.h>18#include <linux/if_ether.h>19#include <linux/blk-mq-pci.h>20#include <scsi/fc/fc_fip.h>21#include <scsi/scsi_host.h>22#include <scsi/scsi_transport.h>23#include <scsi/scsi_transport_fc.h>24#include <scsi/scsi_tcq.h>25#include <scsi/libfc.h>26#include <scsi/fc_frame.h>27 28#include "vnic_dev.h"29#include "vnic_intr.h"30#include "vnic_stats.h"31#include "fnic_io.h"32#include "fnic_fip.h"33#include "fnic.h"34 35#define PCI_DEVICE_ID_CISCO_FNIC 0x004536 37/* Timer to poll notification area for events. Used for MSI interrupts */38#define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)39 40static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];41static struct kmem_cache *fnic_io_req_cache;42static LIST_HEAD(fnic_list);43static DEFINE_SPINLOCK(fnic_list_lock);44static DEFINE_IDA(fnic_ida);45 46/* Supported devices by fnic module */47static struct pci_device_id fnic_id_table[] = {48 { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },49 { 0, }50};51 52MODULE_DESCRIPTION(DRV_DESCRIPTION);53MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "54 "Joseph R. Eykholt <jeykholt@cisco.com>");55MODULE_LICENSE("GPL v2");56MODULE_VERSION(DRV_VERSION);57MODULE_DEVICE_TABLE(pci, fnic_id_table);58 59unsigned int fnic_log_level;60module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);61MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");62 63 64unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;65module_param(io_completions, int, S_IRUGO|S_IWUSR);66MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");67 68unsigned int fnic_trace_max_pages = 16;69module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);70MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "71 "for fnic trace buffer");72 73unsigned int fnic_fc_trace_max_pages = 64;74module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);75MODULE_PARM_DESC(fnic_fc_trace_max_pages,76 "Total allocated memory pages for fc trace buffer");77 78static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;79module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);80MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");81 82static struct libfc_function_template fnic_transport_template = {83 .frame_send = fnic_send,84 .lport_set_port_id = fnic_set_port_id,85 .fcp_abort_io = fnic_empty_scsi_cleanup,86 .fcp_cleanup = fnic_empty_scsi_cleanup,87 .exch_mgr_reset = fnic_exch_mgr_reset88};89 90static int fnic_slave_alloc(struct scsi_device *sdev)91{92 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));93 94 if (!rport || fc_remote_port_chkready(rport))95 return -ENXIO;96 97 scsi_change_queue_depth(sdev, fnic_max_qdepth);98 return 0;99}100 101static const struct scsi_host_template fnic_host_template = {102 .module = THIS_MODULE,103 .name = DRV_NAME,104 .queuecommand = fnic_queuecommand,105 .eh_timed_out = fc_eh_timed_out,106 .eh_abort_handler = fnic_abort_cmd,107 .eh_device_reset_handler = fnic_device_reset,108 .eh_host_reset_handler = fnic_host_reset,109 .slave_alloc = fnic_slave_alloc,110 .change_queue_depth = scsi_change_queue_depth,111 .this_id = -1,112 .cmd_per_lun = 3,113 .can_queue = FNIC_DFLT_IO_REQ,114 .sg_tablesize = FNIC_MAX_SG_DESC_CNT,115 .max_sectors = 0xffff,116 .shost_groups = fnic_host_groups,117 .track_queue_depth = 1,118 .cmd_size = sizeof(struct fnic_cmd_priv),119 .map_queues = fnic_mq_map_queues_cpus,120};121 122static void123fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)124{125 if (timeout)126 rport->dev_loss_tmo = timeout;127 else128 rport->dev_loss_tmo = 1;129}130 131static void fnic_get_host_speed(struct Scsi_Host *shost);132static struct scsi_transport_template *fnic_fc_transport;133static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);134static void fnic_reset_host_stats(struct Scsi_Host *);135 136static struct fc_function_template fnic_fc_functions = {137 138 .show_host_node_name = 1,139 .show_host_port_name = 1,140 .show_host_supported_classes = 1,141 .show_host_supported_fc4s = 1,142 .show_host_active_fc4s = 1,143 .show_host_maxframe_size = 1,144 .show_host_port_id = 1,145 .show_host_supported_speeds = 1,146 .get_host_speed = fnic_get_host_speed,147 .show_host_speed = 1,148 .show_host_port_type = 1,149 .get_host_port_state = fc_get_host_port_state,150 .show_host_port_state = 1,151 .show_host_symbolic_name = 1,152 .show_rport_maxframe_size = 1,153 .show_rport_supported_classes = 1,154 .show_host_fabric_name = 1,155 .show_starget_node_name = 1,156 .show_starget_port_name = 1,157 .show_starget_port_id = 1,158 .show_rport_dev_loss_tmo = 1,159 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,160 .issue_fc_host_lip = fnic_reset,161 .get_fc_host_stats = fnic_get_stats,162 .reset_fc_host_stats = fnic_reset_host_stats,163 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),164 .terminate_rport_io = fnic_terminate_rport_io,165 .bsg_request = fc_lport_bsg_request,166};167 168static void fnic_get_host_speed(struct Scsi_Host *shost)169{170 struct fc_lport *lp = shost_priv(shost);171 struct fnic *fnic = lport_priv(lp);172 u32 port_speed = vnic_dev_port_speed(fnic->vdev);173 174 /* Add in other values as they get defined in fw */175 switch (port_speed) {176 case DCEM_PORTSPEED_10G:177 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;178 break;179 case DCEM_PORTSPEED_20G:180 fc_host_speed(shost) = FC_PORTSPEED_20GBIT;181 break;182 case DCEM_PORTSPEED_25G:183 fc_host_speed(shost) = FC_PORTSPEED_25GBIT;184 break;185 case DCEM_PORTSPEED_40G:186 case DCEM_PORTSPEED_4x10G:187 fc_host_speed(shost) = FC_PORTSPEED_40GBIT;188 break;189 case DCEM_PORTSPEED_100G:190 fc_host_speed(shost) = FC_PORTSPEED_100GBIT;191 break;192 default:193 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;194 break;195 }196}197 198static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)199{200 int ret;201 struct fc_lport *lp = shost_priv(host);202 struct fnic *fnic = lport_priv(lp);203 struct fc_host_statistics *stats = &lp->host_stats;204 struct vnic_stats *vs;205 unsigned long flags;206 207 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))208 return stats;209 fnic->stats_time = jiffies;210 211 spin_lock_irqsave(&fnic->fnic_lock, flags);212 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);213 spin_unlock_irqrestore(&fnic->fnic_lock, flags);214 215 if (ret) {216 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,217 "fnic: Get vnic stats failed"218 " 0x%x", ret);219 return stats;220 }221 vs = fnic->stats;222 stats->tx_frames = vs->tx.tx_unicast_frames_ok;223 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;224 stats->rx_frames = vs->rx.rx_unicast_frames_ok;225 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;226 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;227 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;228 stats->invalid_crc_count = vs->rx.rx_crc_errors;229 stats->seconds_since_last_reset =230 (jiffies - fnic->stats_reset_time) / HZ;231 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);232 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);233 234 return stats;235}236 237/*238 * fnic_dump_fchost_stats239 * note : dumps fc_statistics into system logs240 */241void fnic_dump_fchost_stats(struct Scsi_Host *host,242 struct fc_host_statistics *stats)243{244 FNIC_MAIN_NOTE(KERN_NOTICE, host,245 "fnic: seconds since last reset = %llu\n",246 stats->seconds_since_last_reset);247 FNIC_MAIN_NOTE(KERN_NOTICE, host,248 "fnic: tx frames = %llu\n",249 stats->tx_frames);250 FNIC_MAIN_NOTE(KERN_NOTICE, host,251 "fnic: tx words = %llu\n",252 stats->tx_words);253 FNIC_MAIN_NOTE(KERN_NOTICE, host,254 "fnic: rx frames = %llu\n",255 stats->rx_frames);256 FNIC_MAIN_NOTE(KERN_NOTICE, host,257 "fnic: rx words = %llu\n",258 stats->rx_words);259 FNIC_MAIN_NOTE(KERN_NOTICE, host,260 "fnic: lip count = %llu\n",261 stats->lip_count);262 FNIC_MAIN_NOTE(KERN_NOTICE, host,263 "fnic: nos count = %llu\n",264 stats->nos_count);265 FNIC_MAIN_NOTE(KERN_NOTICE, host,266 "fnic: error frames = %llu\n",267 stats->error_frames);268 FNIC_MAIN_NOTE(KERN_NOTICE, host,269 "fnic: dumped frames = %llu\n",270 stats->dumped_frames);271 FNIC_MAIN_NOTE(KERN_NOTICE, host,272 "fnic: link failure count = %llu\n",273 stats->link_failure_count);274 FNIC_MAIN_NOTE(KERN_NOTICE, host,275 "fnic: loss of sync count = %llu\n",276 stats->loss_of_sync_count);277 FNIC_MAIN_NOTE(KERN_NOTICE, host,278 "fnic: loss of signal count = %llu\n",279 stats->loss_of_signal_count);280 FNIC_MAIN_NOTE(KERN_NOTICE, host,281 "fnic: prim seq protocol err count = %llu\n",282 stats->prim_seq_protocol_err_count);283 FNIC_MAIN_NOTE(KERN_NOTICE, host,284 "fnic: invalid tx word count= %llu\n",285 stats->invalid_tx_word_count);286 FNIC_MAIN_NOTE(KERN_NOTICE, host,287 "fnic: invalid crc count = %llu\n",288 stats->invalid_crc_count);289 FNIC_MAIN_NOTE(KERN_NOTICE, host,290 "fnic: fcp input requests = %llu\n",291 stats->fcp_input_requests);292 FNIC_MAIN_NOTE(KERN_NOTICE, host,293 "fnic: fcp output requests = %llu\n",294 stats->fcp_output_requests);295 FNIC_MAIN_NOTE(KERN_NOTICE, host,296 "fnic: fcp control requests = %llu\n",297 stats->fcp_control_requests);298 FNIC_MAIN_NOTE(KERN_NOTICE, host,299 "fnic: fcp input megabytes = %llu\n",300 stats->fcp_input_megabytes);301 FNIC_MAIN_NOTE(KERN_NOTICE, host,302 "fnic: fcp output megabytes = %llu\n",303 stats->fcp_output_megabytes);304 return;305}306 307/*308 * fnic_reset_host_stats : clears host stats309 * note : called when reset_statistics set under sysfs dir310 */311static void fnic_reset_host_stats(struct Scsi_Host *host)312{313 int ret;314 struct fc_lport *lp = shost_priv(host);315 struct fnic *fnic = lport_priv(lp);316 struct fc_host_statistics *stats;317 unsigned long flags;318 319 /* dump current stats, before clearing them */320 stats = fnic_get_stats(host);321 fnic_dump_fchost_stats(host, stats);322 323 spin_lock_irqsave(&fnic->fnic_lock, flags);324 ret = vnic_dev_stats_clear(fnic->vdev);325 spin_unlock_irqrestore(&fnic->fnic_lock, flags);326 327 if (ret) {328 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,329 "fnic: Reset vnic stats failed"330 " 0x%x", ret);331 return;332 }333 fnic->stats_reset_time = jiffies;334 memset(stats, 0, sizeof(*stats));335 336 return;337}338 339void fnic_log_q_error(struct fnic *fnic)340{341 unsigned int i;342 u32 error_status;343 344 for (i = 0; i < fnic->raw_wq_count; i++) {345 error_status = ioread32(&fnic->wq[i].ctrl->error_status);346 if (error_status)347 shost_printk(KERN_ERR, fnic->lport->host,348 "WQ[%d] error_status"349 " %d\n", i, error_status);350 }351 352 for (i = 0; i < fnic->rq_count; i++) {353 error_status = ioread32(&fnic->rq[i].ctrl->error_status);354 if (error_status)355 shost_printk(KERN_ERR, fnic->lport->host,356 "RQ[%d] error_status"357 " %d\n", i, error_status);358 }359 360 for (i = 0; i < fnic->wq_copy_count; i++) {361 error_status = ioread32(&fnic->hw_copy_wq[i].ctrl->error_status);362 if (error_status)363 shost_printk(KERN_ERR, fnic->lport->host,364 "CWQ[%d] error_status"365 " %d\n", i, error_status);366 }367}368 369void fnic_handle_link_event(struct fnic *fnic)370{371 unsigned long flags;372 373 spin_lock_irqsave(&fnic->fnic_lock, flags);374 if (fnic->stop_rx_link_events) {375 spin_unlock_irqrestore(&fnic->fnic_lock, flags);376 return;377 }378 spin_unlock_irqrestore(&fnic->fnic_lock, flags);379 380 queue_work(fnic_event_queue, &fnic->link_work);381 382}383 384static int fnic_notify_set(struct fnic *fnic)385{386 int err;387 388 switch (vnic_dev_get_intr_mode(fnic->vdev)) {389 case VNIC_DEV_INTR_MODE_INTX:390 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);391 break;392 case VNIC_DEV_INTR_MODE_MSI:393 err = vnic_dev_notify_set(fnic->vdev, -1);394 break;395 case VNIC_DEV_INTR_MODE_MSIX:396 err = vnic_dev_notify_set(fnic->vdev, fnic->wq_copy_count + fnic->copy_wq_base);397 break;398 default:399 shost_printk(KERN_ERR, fnic->lport->host,400 "Interrupt mode should be set up"401 " before devcmd notify set %d\n",402 vnic_dev_get_intr_mode(fnic->vdev));403 err = -1;404 break;405 }406 407 return err;408}409 410static void fnic_notify_timer(struct timer_list *t)411{412 struct fnic *fnic = from_timer(fnic, t, notify_timer);413 414 fnic_handle_link_event(fnic);415 mod_timer(&fnic->notify_timer,416 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));417}418 419static void fnic_fip_notify_timer(struct timer_list *t)420{421 struct fnic *fnic = from_timer(fnic, t, fip_timer);422 423 fnic_handle_fip_timer(fnic);424}425 426static void fnic_notify_timer_start(struct fnic *fnic)427{428 switch (vnic_dev_get_intr_mode(fnic->vdev)) {429 case VNIC_DEV_INTR_MODE_MSI:430 /*431 * Schedule first timeout immediately. The driver is432 * initiatialized and ready to look for link up notification433 */434 mod_timer(&fnic->notify_timer, jiffies);435 break;436 default:437 /* Using intr for notification for INTx/MSI-X */438 break;439 }440}441 442static int fnic_dev_wait(struct vnic_dev *vdev,443 int (*start)(struct vnic_dev *, int),444 int (*finished)(struct vnic_dev *, int *),445 int arg)446{447 unsigned long time;448 int done;449 int err;450 int count;451 452 count = 0;453 454 err = start(vdev, arg);455 if (err)456 return err;457 458 /* Wait for func to complete.459 * Sometime schedule_timeout_uninterruptible take long time460 * to wake up so we do not retry as we are only waiting for461 * 2 seconds in while loop. By adding count, we make sure462 * we try atleast three times before returning -ETIMEDOUT463 */464 time = jiffies + (HZ * 2);465 do {466 err = finished(vdev, &done);467 count++;468 if (err)469 return err;470 if (done)471 return 0;472 schedule_timeout_uninterruptible(HZ / 10);473 } while (time_after(time, jiffies) || (count < 3));474 475 return -ETIMEDOUT;476}477 478static int fnic_cleanup(struct fnic *fnic)479{480 unsigned int i;481 int err;482 int raw_wq_rq_counts;483 484 vnic_dev_disable(fnic->vdev);485 for (i = 0; i < fnic->intr_count; i++)486 vnic_intr_mask(&fnic->intr[i]);487 488 for (i = 0; i < fnic->rq_count; i++) {489 err = vnic_rq_disable(&fnic->rq[i]);490 if (err)491 return err;492 }493 for (i = 0; i < fnic->raw_wq_count; i++) {494 err = vnic_wq_disable(&fnic->wq[i]);495 if (err)496 return err;497 }498 for (i = 0; i < fnic->wq_copy_count; i++) {499 err = vnic_wq_copy_disable(&fnic->hw_copy_wq[i]);500 if (err)501 return err;502 raw_wq_rq_counts = fnic->raw_wq_count + fnic->rq_count;503 fnic_wq_copy_cmpl_handler(fnic, -1, i + raw_wq_rq_counts);504 }505 506 /* Clean up completed IOs and FCS frames */507 fnic_wq_cmpl_handler(fnic, -1);508 fnic_rq_cmpl_handler(fnic, -1);509 510 /* Clean up the IOs and FCS frames that have not completed */511 for (i = 0; i < fnic->raw_wq_count; i++)512 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);513 for (i = 0; i < fnic->rq_count; i++)514 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);515 for (i = 0; i < fnic->wq_copy_count; i++)516 vnic_wq_copy_clean(&fnic->hw_copy_wq[i],517 fnic_wq_copy_cleanup_handler);518 519 for (i = 0; i < fnic->cq_count; i++)520 vnic_cq_clean(&fnic->cq[i]);521 for (i = 0; i < fnic->intr_count; i++)522 vnic_intr_clean(&fnic->intr[i]);523 524 mempool_destroy(fnic->io_req_pool);525 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)526 mempool_destroy(fnic->io_sgl_pool[i]);527 528 return 0;529}530 531static void fnic_iounmap(struct fnic *fnic)532{533 if (fnic->bar0.vaddr)534 iounmap(fnic->bar0.vaddr);535}536 537/**538 * fnic_get_mac() - get assigned data MAC address for FIP code.539 * @lport: local port.540 */541static u8 *fnic_get_mac(struct fc_lport *lport)542{543 struct fnic *fnic = lport_priv(lport);544 545 return fnic->data_src_addr;546}547 548static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)549{550 vnic_dev_set_default_vlan(fnic->vdev, vlan_id);551}552 553static int fnic_scsi_drv_init(struct fnic *fnic)554{555 struct Scsi_Host *host = fnic->lport->host;556 557 /* Configure maximum outstanding IO reqs*/558 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD)559 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,560 max_t(u32, FNIC_MIN_IO_REQ,561 fnic->config.io_throttle_count));562 563 fnic->fnic_max_tag_id = host->can_queue;564 host->max_lun = fnic->config.luns_per_tgt;565 host->max_id = FNIC_MAX_FCP_TARGET;566 host->max_cmd_len = FCOE_MAX_CMD_LEN;567 568 host->nr_hw_queues = fnic->wq_copy_count;569 570 shost_printk(KERN_INFO, host,571 "fnic: can_queue: %d max_lun: %llu",572 host->can_queue, host->max_lun);573 574 shost_printk(KERN_INFO, host,575 "fnic: max_id: %d max_cmd_len: %d nr_hw_queues: %d",576 host->max_id, host->max_cmd_len, host->nr_hw_queues);577 578 return 0;579}580 581void fnic_mq_map_queues_cpus(struct Scsi_Host *host)582{583 struct fc_lport *lp = shost_priv(host);584 struct fnic *fnic = lport_priv(lp);585 struct pci_dev *l_pdev = fnic->pdev;586 int intr_mode = fnic->config.intr_mode;587 struct blk_mq_queue_map *qmap = &host->tag_set.map[HCTX_TYPE_DEFAULT];588 589 if (intr_mode == VNIC_DEV_INTR_MODE_MSI || intr_mode == VNIC_DEV_INTR_MODE_INTX) {590 FNIC_MAIN_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,591 "intr_mode is not msix\n");592 return;593 }594 595 FNIC_MAIN_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,596 "qmap->nr_queues: %d\n", qmap->nr_queues);597 598 if (l_pdev == NULL) {599 FNIC_MAIN_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,600 "l_pdev is null\n");601 return;602 }603 604 blk_mq_pci_map_queues(qmap, l_pdev, FNIC_PCI_OFFSET);605}606 607static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)608{609 struct Scsi_Host *host;610 struct fc_lport *lp;611 struct fnic *fnic;612 mempool_t *pool;613 int err = 0;614 int fnic_id = 0;615 int i;616 unsigned long flags;617 int hwq;618 619 /*620 * Allocate SCSI Host and set up association between host,621 * local port, and fnic622 */623 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));624 if (!lp) {625 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");626 err = -ENOMEM;627 goto err_out;628 }629 630 host = lp->host;631 fnic = lport_priv(lp);632 633 fnic_id = ida_alloc(&fnic_ida, GFP_KERNEL);634 if (fnic_id < 0) {635 pr_err("Unable to alloc fnic ID\n");636 err = fnic_id;637 goto err_out_ida_alloc;638 }639 fnic->lport = lp;640 fnic->ctlr.lp = lp;641 fnic->link_events = 0;642 fnic->pdev = pdev;643 644 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,645 host->host_no);646 647 host->transportt = fnic_fc_transport;648 fnic->fnic_num = fnic_id;649 fnic_stats_debugfs_init(fnic);650 651 err = pci_enable_device(pdev);652 if (err) {653 shost_printk(KERN_ERR, fnic->lport->host,654 "Cannot enable PCI device, aborting.\n");655 goto err_out_free_hba;656 }657 658 err = pci_request_regions(pdev, DRV_NAME);659 if (err) {660 shost_printk(KERN_ERR, fnic->lport->host,661 "Cannot enable PCI resources, aborting\n");662 goto err_out_disable_device;663 }664 665 pci_set_master(pdev);666 667 /* Query PCI controller on system for DMA addressing668 * limitation for the device. Try 47-bit first, and669 * fail to 32-bit. Cisco VIC supports 47 bits only.670 */671 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47));672 if (err) {673 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));674 if (err) {675 shost_printk(KERN_ERR, fnic->lport->host,676 "No usable DMA configuration "677 "aborting\n");678 goto err_out_release_regions;679 }680 }681 682 /* Map vNIC resources from BAR0 */683 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {684 shost_printk(KERN_ERR, fnic->lport->host,685 "BAR0 not memory-map'able, aborting.\n");686 err = -ENODEV;687 goto err_out_release_regions;688 }689 690 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);691 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);692 fnic->bar0.len = pci_resource_len(pdev, 0);693 694 if (!fnic->bar0.vaddr) {695 shost_printk(KERN_ERR, fnic->lport->host,696 "Cannot memory-map BAR0 res hdr, "697 "aborting.\n");698 err = -ENODEV;699 goto err_out_release_regions;700 }701 702 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);703 if (!fnic->vdev) {704 shost_printk(KERN_ERR, fnic->lport->host,705 "vNIC registration failed, "706 "aborting.\n");707 err = -ENODEV;708 goto err_out_iounmap;709 }710 711 err = vnic_dev_cmd_init(fnic->vdev);712 if (err) {713 shost_printk(KERN_ERR, fnic->lport->host,714 "vnic_dev_cmd_init() returns %d, aborting\n",715 err);716 goto err_out_vnic_unregister;717 }718 719 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,720 vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);721 if (err) {722 shost_printk(KERN_ERR, fnic->lport->host,723 "vNIC dev open failed, aborting.\n");724 goto err_out_dev_cmd_deinit;725 }726 727 err = vnic_dev_init(fnic->vdev, 0);728 if (err) {729 shost_printk(KERN_ERR, fnic->lport->host,730 "vNIC dev init failed, aborting.\n");731 goto err_out_dev_close;732 }733 734 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);735 if (err) {736 shost_printk(KERN_ERR, fnic->lport->host,737 "vNIC get MAC addr failed \n");738 goto err_out_dev_close;739 }740 /* set data_src for point-to-point mode and to keep it non-zero */741 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);742 743 /* Get vNIC configuration */744 err = fnic_get_vnic_config(fnic);745 if (err) {746 shost_printk(KERN_ERR, fnic->lport->host,747 "Get vNIC configuration failed, "748 "aborting.\n");749 goto err_out_dev_close;750 }751 752 /* Setup PCI resources */753 pci_set_drvdata(pdev, fnic);754 755 fnic_get_res_counts(fnic);756 757 err = fnic_set_intr_mode(fnic);758 if (err) {759 shost_printk(KERN_ERR, fnic->lport->host,760 "Failed to set intr mode, "761 "aborting.\n");762 goto err_out_dev_close;763 }764 765 err = fnic_alloc_vnic_resources(fnic);766 if (err) {767 shost_printk(KERN_ERR, fnic->lport->host,768 "Failed to alloc vNIC resources, "769 "aborting.\n");770 goto err_out_clear_intr;771 }772 773 fnic_scsi_drv_init(fnic);774 775 for (hwq = 0; hwq < fnic->wq_copy_count; hwq++) {776 fnic->sw_copy_wq[hwq].ioreq_table_size = fnic->fnic_max_tag_id;777 fnic->sw_copy_wq[hwq].io_req_table =778 kzalloc((fnic->sw_copy_wq[hwq].ioreq_table_size + 1) *779 sizeof(struct fnic_io_req *), GFP_KERNEL);780 }781 shost_printk(KERN_INFO, fnic->lport->host, "fnic copy wqs: %d, Q0 ioreq table size: %d\n",782 fnic->wq_copy_count, fnic->sw_copy_wq[0].ioreq_table_size);783 784 /* initialize all fnic locks */785 spin_lock_init(&fnic->fnic_lock);786 787 for (i = 0; i < FNIC_WQ_MAX; i++)788 spin_lock_init(&fnic->wq_lock[i]);789 790 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {791 spin_lock_init(&fnic->wq_copy_lock[i]);792 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;793 fnic->fw_ack_recd[i] = 0;794 fnic->fw_ack_index[i] = -1;795 }796 797 err = -ENOMEM;798 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);799 if (!fnic->io_req_pool)800 goto err_out_free_resources;801 802 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);803 if (!pool)804 goto err_out_free_ioreq_pool;805 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;806 807 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);808 if (!pool)809 goto err_out_free_dflt_pool;810 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;811 812 /* setup vlan config, hw inserts vlan header */813 fnic->vlan_hw_insert = 1;814 fnic->vlan_id = 0;815 816 /* Initialize the FIP fcoe_ctrl struct */817 fnic->ctlr.send = fnic_eth_send;818 fnic->ctlr.update_mac = fnic_update_mac;819 fnic->ctlr.get_src_addr = fnic_get_mac;820 if (fnic->config.flags & VFCF_FIP_CAPABLE) {821 shost_printk(KERN_INFO, fnic->lport->host,822 "firmware supports FIP\n");823 /* enable directed and multicast */824 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);825 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);826 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);827 fnic->set_vlan = fnic_set_vlan;828 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);829 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);830 spin_lock_init(&fnic->vlans_lock);831 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);832 INIT_WORK(&fnic->event_work, fnic_handle_event);833 skb_queue_head_init(&fnic->fip_frame_queue);834 INIT_LIST_HEAD(&fnic->evlist);835 INIT_LIST_HEAD(&fnic->vlans);836 } else {837 shost_printk(KERN_INFO, fnic->lport->host,838 "firmware uses non-FIP mode\n");839 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);840 fnic->ctlr.state = FIP_ST_NON_FIP;841 }842 fnic->state = FNIC_IN_FC_MODE;843 844 atomic_set(&fnic->in_flight, 0);845 fnic->state_flags = FNIC_FLAGS_NONE;846 847 /* Enable hardware stripping of vlan header on ingress */848 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);849 850 /* Setup notification buffer area */851 err = fnic_notify_set(fnic);852 if (err) {853 shost_printk(KERN_ERR, fnic->lport->host,854 "Failed to alloc notify buffer, aborting.\n");855 goto err_out_free_max_pool;856 }857 858 /* Setup notify timer when using MSI interrupts */859 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)860 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);861 862 /* allocate RQ buffers and post them to RQ*/863 for (i = 0; i < fnic->rq_count; i++) {864 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);865 if (err) {866 shost_printk(KERN_ERR, fnic->lport->host,867 "fnic_alloc_rq_frame can't alloc "868 "frame\n");869 goto err_out_rq_buf;870 }871 }872 873 /* Enable all queues */874 for (i = 0; i < fnic->raw_wq_count; i++)875 vnic_wq_enable(&fnic->wq[i]);876 for (i = 0; i < fnic->rq_count; i++) {877 if (!ioread32(&fnic->rq[i].ctrl->enable))878 vnic_rq_enable(&fnic->rq[i]);879 }880 for (i = 0; i < fnic->wq_copy_count; i++)881 vnic_wq_copy_enable(&fnic->hw_copy_wq[i]);882 883 err = fnic_request_intr(fnic);884 if (err) {885 shost_printk(KERN_ERR, fnic->lport->host,886 "Unable to request irq.\n");887 goto err_out_request_intr;888 }889 890 /*891 * Initialization done with PCI system, hardware, firmware.892 * Add host to SCSI893 */894 err = scsi_add_host(lp->host, &pdev->dev);895 if (err) {896 shost_printk(KERN_ERR, fnic->lport->host,897 "fnic: scsi_add_host failed...exiting\n");898 goto err_out_scsi_add_host;899 }900 901 902 /* Start local port initiatialization */903 904 lp->link_up = 0;905 906 lp->max_retry_count = fnic->config.flogi_retries;907 lp->max_rport_retry_count = fnic->config.plogi_retries;908 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |909 FCP_SPPF_CONF_COMPL);910 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)911 lp->service_params |= FCP_SPPF_RETRY;912 913 lp->boot_time = jiffies;914 lp->e_d_tov = fnic->config.ed_tov;915 lp->r_a_tov = fnic->config.ra_tov;916 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;917 fc_set_wwnn(lp, fnic->config.node_wwn);918 fc_set_wwpn(lp, fnic->config.port_wwn);919 920 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);921 922 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,923 FCPIO_HOST_EXCH_RANGE_END, NULL)) {924 err = -ENOMEM;925 goto err_out_fc_exch_mgr_alloc;926 }927 928 fc_lport_init_stats(lp);929 fnic->stats_reset_time = jiffies;930 931 fc_lport_config(lp);932 933 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +934 sizeof(struct fc_frame_header))) {935 err = -EINVAL;936 goto err_out_free_exch_mgr;937 }938 fc_host_maxframe_size(lp->host) = lp->mfs;939 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;940 941 sprintf(fc_host_symbolic_name(lp->host),942 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);943 944 spin_lock_irqsave(&fnic_list_lock, flags);945 list_add_tail(&fnic->list, &fnic_list);946 spin_unlock_irqrestore(&fnic_list_lock, flags);947 948 INIT_WORK(&fnic->link_work, fnic_handle_link);949 INIT_WORK(&fnic->frame_work, fnic_handle_frame);950 INIT_WORK(&fnic->flush_work, fnic_flush_tx);951 skb_queue_head_init(&fnic->frame_queue);952 skb_queue_head_init(&fnic->tx_queue);953 954 fc_fabric_login(lp);955 956 vnic_dev_enable(fnic->vdev);957 958 for (i = 0; i < fnic->intr_count; i++)959 vnic_intr_unmask(&fnic->intr[i]);960 961 fnic_notify_timer_start(fnic);962 963 return 0;964 965err_out_free_exch_mgr:966 fc_exch_mgr_free(lp);967err_out_fc_exch_mgr_alloc:968 fc_remove_host(lp->host);969 scsi_remove_host(lp->host);970err_out_scsi_add_host:971 fnic_free_intr(fnic);972err_out_request_intr:973 for (i = 0; i < fnic->rq_count; i++)974 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);975err_out_rq_buf:976 vnic_dev_notify_unset(fnic->vdev);977err_out_free_max_pool:978 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);979err_out_free_dflt_pool:980 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);981err_out_free_ioreq_pool:982 mempool_destroy(fnic->io_req_pool);983err_out_free_resources:984 for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)985 kfree(fnic->sw_copy_wq[hwq].io_req_table);986 fnic_free_vnic_resources(fnic);987err_out_clear_intr:988 fnic_clear_intr_mode(fnic);989err_out_dev_close:990 vnic_dev_close(fnic->vdev);991err_out_dev_cmd_deinit:992err_out_vnic_unregister:993 vnic_dev_unregister(fnic->vdev);994err_out_iounmap:995 fnic_iounmap(fnic);996err_out_release_regions:997 pci_release_regions(pdev);998err_out_disable_device:999 pci_disable_device(pdev);1000err_out_free_hba:1001 fnic_stats_debugfs_remove(fnic);1002 ida_free(&fnic_ida, fnic->fnic_num);1003err_out_ida_alloc:1004 scsi_host_put(lp->host);1005err_out:1006 return err;1007}1008 1009static void fnic_remove(struct pci_dev *pdev)1010{1011 struct fnic *fnic = pci_get_drvdata(pdev);1012 struct fc_lport *lp = fnic->lport;1013 unsigned long flags;1014 int hwq;1015 1016 /*1017 * Mark state so that the workqueue thread stops forwarding1018 * received frames and link events to the local port. ISR and1019 * other threads that can queue work items will also stop1020 * creating work items on the fnic workqueue1021 */1022 spin_lock_irqsave(&fnic->fnic_lock, flags);1023 fnic->stop_rx_link_events = 1;1024 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1025 1026 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)1027 del_timer_sync(&fnic->notify_timer);1028 1029 /*1030 * Flush the fnic event queue. After this call, there should1031 * be no event queued for this fnic device in the workqueue1032 */1033 flush_workqueue(fnic_event_queue);1034 skb_queue_purge(&fnic->frame_queue);1035 skb_queue_purge(&fnic->tx_queue);1036 1037 if (fnic->config.flags & VFCF_FIP_CAPABLE) {1038 del_timer_sync(&fnic->fip_timer);1039 skb_queue_purge(&fnic->fip_frame_queue);1040 fnic_fcoe_reset_vlans(fnic);1041 fnic_fcoe_evlist_free(fnic);1042 }1043 1044 /*1045 * Log off the fabric. This stops all remote ports, dns port,1046 * logs off the fabric. This flushes all rport, disc, lport work1047 * before returning1048 */1049 fc_fabric_logoff(fnic->lport);1050 1051 spin_lock_irqsave(&fnic->fnic_lock, flags);1052 fnic->in_remove = 1;1053 spin_unlock_irqrestore(&fnic->fnic_lock, flags);1054 1055 fcoe_ctlr_destroy(&fnic->ctlr);1056 fc_lport_destroy(lp);1057 fnic_stats_debugfs_remove(fnic);1058 1059 /*1060 * This stops the fnic device, masks all interrupts. Completed1061 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are1062 * cleaned up1063 */1064 fnic_cleanup(fnic);1065 1066 BUG_ON(!skb_queue_empty(&fnic->frame_queue));1067 BUG_ON(!skb_queue_empty(&fnic->tx_queue));1068 1069 spin_lock_irqsave(&fnic_list_lock, flags);1070 list_del(&fnic->list);1071 spin_unlock_irqrestore(&fnic_list_lock, flags);1072 1073 fc_remove_host(fnic->lport->host);1074 scsi_remove_host(fnic->lport->host);1075 for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)1076 kfree(fnic->sw_copy_wq[hwq].io_req_table);1077 fc_exch_mgr_free(fnic->lport);1078 vnic_dev_notify_unset(fnic->vdev);1079 fnic_free_intr(fnic);1080 fnic_free_vnic_resources(fnic);1081 fnic_clear_intr_mode(fnic);1082 vnic_dev_close(fnic->vdev);1083 vnic_dev_unregister(fnic->vdev);1084 fnic_iounmap(fnic);1085 pci_release_regions(pdev);1086 pci_disable_device(pdev);1087 ida_free(&fnic_ida, fnic->fnic_num);1088 scsi_host_put(lp->host);1089}1090 1091static struct pci_driver fnic_driver = {1092 .name = DRV_NAME,1093 .id_table = fnic_id_table,1094 .probe = fnic_probe,1095 .remove = fnic_remove,1096};1097 1098static int __init fnic_init_module(void)1099{1100 size_t len;1101 int err = 0;1102 1103 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);1104 1105 /* Create debugfs entries for fnic */1106 err = fnic_debugfs_init();1107 if (err < 0) {1108 printk(KERN_ERR PFX "Failed to create fnic directory "1109 "for tracing and stats logging\n");1110 fnic_debugfs_terminate();1111 }1112 1113 /* Allocate memory for trace buffer */1114 err = fnic_trace_buf_init();1115 if (err < 0) {1116 printk(KERN_ERR PFX1117 "Trace buffer initialization Failed. "1118 "Fnic Tracing utility is disabled\n");1119 fnic_trace_free();1120 }1121 1122 /* Allocate memory for fc trace buffer */1123 err = fnic_fc_trace_init();1124 if (err < 0) {1125 printk(KERN_ERR PFX "FC trace buffer initialization Failed "1126 "FC frame tracing utility is disabled\n");1127 fnic_fc_trace_free();1128 }1129 1130 /* Create a cache for allocation of default size sgls */1131 len = sizeof(struct fnic_dflt_sgl_list);1132 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create1133 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,1134 SLAB_HWCACHE_ALIGN,1135 NULL);1136 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {1137 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");1138 err = -ENOMEM;1139 goto err_create_fnic_sgl_slab_dflt;1140 }1141 1142 /* Create a cache for allocation of max size sgls*/1143 len = sizeof(struct fnic_sgl_list);1144 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create1145 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,1146 SLAB_HWCACHE_ALIGN,1147 NULL);1148 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {1149 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");1150 err = -ENOMEM;1151 goto err_create_fnic_sgl_slab_max;1152 }1153 1154 /* Create a cache of io_req structs for use via mempool */1155 fnic_io_req_cache = kmem_cache_create("fnic_io_req",1156 sizeof(struct fnic_io_req),1157 0, SLAB_HWCACHE_ALIGN, NULL);1158 if (!fnic_io_req_cache) {1159 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");1160 err = -ENOMEM;1161 goto err_create_fnic_ioreq_slab;1162 }1163 1164 fnic_event_queue =1165 alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_event_wq");1166 if (!fnic_event_queue) {1167 printk(KERN_ERR PFX "fnic work queue create failed\n");1168 err = -ENOMEM;1169 goto err_create_fnic_workq;1170 }1171 1172 fnic_fip_queue =1173 alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, "fnic_fip_q");1174 if (!fnic_fip_queue) {1175 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");1176 err = -ENOMEM;1177 goto err_create_fip_workq;1178 }1179 1180 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);1181 if (!fnic_fc_transport) {1182 printk(KERN_ERR PFX "fc_attach_transport error\n");1183 err = -ENOMEM;1184 goto err_fc_transport;1185 }1186 1187 /* register the driver with PCI system */1188 err = pci_register_driver(&fnic_driver);1189 if (err < 0) {1190 printk(KERN_ERR PFX "pci register error\n");1191 goto err_pci_register;1192 }1193 return err;1194 1195err_pci_register:1196 fc_release_transport(fnic_fc_transport);1197err_fc_transport:1198 destroy_workqueue(fnic_fip_queue);1199err_create_fip_workq:1200 destroy_workqueue(fnic_event_queue);1201err_create_fnic_workq:1202 kmem_cache_destroy(fnic_io_req_cache);1203err_create_fnic_ioreq_slab:1204 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);1205err_create_fnic_sgl_slab_max:1206 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);1207err_create_fnic_sgl_slab_dflt:1208 fnic_trace_free();1209 fnic_fc_trace_free();1210 fnic_debugfs_terminate();1211 return err;1212}1213 1214static void __exit fnic_cleanup_module(void)1215{1216 pci_unregister_driver(&fnic_driver);1217 destroy_workqueue(fnic_event_queue);1218 if (fnic_fip_queue)1219 destroy_workqueue(fnic_fip_queue);1220 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);1221 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);1222 kmem_cache_destroy(fnic_io_req_cache);1223 fc_release_transport(fnic_fc_transport);1224 fnic_trace_free();1225 fnic_fc_trace_free();1226 fnic_debugfs_terminate();1227 ida_destroy(&fnic_ida);1228}1229 1230module_init(fnic_init_module);1231module_exit(fnic_cleanup_module);1232