1 /**********************************************************************
2 * Author: Cavium, Inc.
3 *
4 * Contact: support@cavium.com
5 * Please include "LiquidIO" in the subject.
6 *
7 * Copyright (c) 2003-2016 Cavium, Inc.
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more details.
17 ***********************************************************************/
18 #include <linux/module.h>
19 #include <linux/interrupt.h>
20 #include <linux/pci.h>
21 #include <net/vxlan.h>
22 #include "liquidio_common.h"
23 #include "octeon_droq.h"
24 #include "octeon_iq.h"
25 #include "response_manager.h"
26 #include "octeon_device.h"
27 #include "octeon_nic.h"
28 #include "octeon_main.h"
29 #include "octeon_network.h"
30 #include "cn23xx_vf_device.h"
31
32 MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
33 MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Virtual Function Driver");
34 MODULE_LICENSE("GPL");
35 MODULE_VERSION(LIQUIDIO_VERSION);
36
37 static int debug = -1;
38 module_param(debug, int, 0644);
39 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
40
41 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
42
43 struct liquidio_rx_ctl_context {
44 int octeon_id;
45
46 wait_queue_head_t wc;
47
48 int cond;
49 };
50
51 struct oct_timestamp_resp {
52 u64 rh;
53 u64 timestamp;
54 u64 status;
55 };
56
57 union tx_info {
58 u64 u64;
59 struct {
60 #ifdef __BIG_ENDIAN_BITFIELD
61 u16 gso_size;
62 u16 gso_segs;
63 u32 reserved;
64 #else
65 u32 reserved;
66 u16 gso_segs;
67 u16 gso_size;
68 #endif
69 } s;
70 };
71
72 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
73 #define OCTNIC_GSO_MAX_SIZE \
74 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
75
76 static int
77 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
78 static void liquidio_vf_remove(struct pci_dev *pdev);
79 static int octeon_device_init(struct octeon_device *oct);
80 static int liquidio_stop(struct net_device *netdev);
81
lio_wait_for_oq_pkts(struct octeon_device * oct)82 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
83 {
84 struct octeon_device_priv *oct_priv =
85 (struct octeon_device_priv *)oct->priv;
86 int retry = MAX_IO_PENDING_PKT_COUNT;
87 int pkt_cnt = 0, pending_pkts;
88 int i;
89
90 do {
91 pending_pkts = 0;
92
93 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
94 if (!(oct->io_qmask.oq & BIT_ULL(i)))
95 continue;
96 pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
97 }
98 if (pkt_cnt > 0) {
99 pending_pkts += pkt_cnt;
100 tasklet_schedule(&oct_priv->droq_tasklet);
101 }
102 pkt_cnt = 0;
103 schedule_timeout_uninterruptible(1);
104
105 } while (retry-- && pending_pkts);
106
107 return pkt_cnt;
108 }
109
110 /**
111 * \brief Cause device to go quiet so it can be safely removed/reset/etc
112 * @param oct Pointer to Octeon device
113 */
pcierror_quiesce_device(struct octeon_device * oct)114 static void pcierror_quiesce_device(struct octeon_device *oct)
115 {
116 int i;
117
118 /* Disable the input and output queues now. No more packets will
119 * arrive from Octeon, but we should wait for all packet processing
120 * to finish.
121 */
122
123 /* To allow for in-flight requests */
124 schedule_timeout_uninterruptible(100);
125
126 if (wait_for_pending_requests(oct))
127 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
128
129 /* Force all requests waiting to be fetched by OCTEON to complete. */
130 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
131 struct octeon_instr_queue *iq;
132
133 if (!(oct->io_qmask.iq & BIT_ULL(i)))
134 continue;
135 iq = oct->instr_queue[i];
136
137 if (atomic_read(&iq->instr_pending)) {
138 spin_lock_bh(&iq->lock);
139 iq->fill_cnt = 0;
140 iq->octeon_read_index = iq->host_write_index;
141 iq->stats.instr_processed +=
142 atomic_read(&iq->instr_pending);
143 lio_process_iq_request_list(oct, iq, 0);
144 spin_unlock_bh(&iq->lock);
145 }
146 }
147
148 /* Force all pending ordered list requests to time out. */
149 lio_process_ordered_list(oct, 1);
150
151 /* We do not need to wait for output queue packets to be processed. */
152 }
153
154 /**
155 * \brief Cleanup PCI AER uncorrectable error status
156 * @param dev Pointer to PCI device
157 */
cleanup_aer_uncorrect_error_status(struct pci_dev * dev)158 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
159 {
160 u32 status, mask;
161 int pos = 0x100;
162
163 pr_info("%s :\n", __func__);
164
165 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
166 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
167 if (dev->error_state == pci_channel_io_normal)
168 status &= ~mask; /* Clear corresponding nonfatal bits */
169 else
170 status &= mask; /* Clear corresponding fatal bits */
171 pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
172 }
173
174 /**
175 * \brief Stop all PCI IO to a given device
176 * @param dev Pointer to Octeon device
177 */
stop_pci_io(struct octeon_device * oct)178 static void stop_pci_io(struct octeon_device *oct)
179 {
180 struct msix_entry *msix_entries;
181 int i;
182
183 /* No more instructions will be forwarded. */
184 atomic_set(&oct->status, OCT_DEV_IN_RESET);
185
186 for (i = 0; i < oct->ifcount; i++)
187 netif_device_detach(oct->props[i].netdev);
188
189 /* Disable interrupts */
190 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
191
192 pcierror_quiesce_device(oct);
193 if (oct->msix_on) {
194 msix_entries = (struct msix_entry *)oct->msix_entries;
195 for (i = 0; i < oct->num_msix_irqs; i++) {
196 /* clear the affinity_cpumask */
197 irq_set_affinity_hint(msix_entries[i].vector,
198 NULL);
199 free_irq(msix_entries[i].vector,
200 &oct->ioq_vector[i]);
201 }
202 pci_disable_msix(oct->pci_dev);
203 kfree(oct->msix_entries);
204 oct->msix_entries = NULL;
205 octeon_free_ioq_vector(oct);
206 }
207 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
208 lio_get_state_string(&oct->status));
209
210 /* making it a common function for all OCTEON models */
211 cleanup_aer_uncorrect_error_status(oct->pci_dev);
212
213 pci_disable_device(oct->pci_dev);
214 }
215
216 /**
217 * \brief called when PCI error is detected
218 * @param pdev Pointer to PCI device
219 * @param state The current pci connection state
220 *
221 * This function is called after a PCI bus error affecting
222 * this device has been detected.
223 */
liquidio_pcie_error_detected(struct pci_dev * pdev,pci_channel_state_t state)224 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
225 pci_channel_state_t state)
226 {
227 struct octeon_device *oct = pci_get_drvdata(pdev);
228
229 /* Non-correctable Non-fatal errors */
230 if (state == pci_channel_io_normal) {
231 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
232 cleanup_aer_uncorrect_error_status(oct->pci_dev);
233 return PCI_ERS_RESULT_CAN_RECOVER;
234 }
235
236 /* Non-correctable Fatal errors */
237 dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
238 stop_pci_io(oct);
239
240 return PCI_ERS_RESULT_DISCONNECT;
241 }
242
243 /* For PCI-E Advanced Error Recovery (AER) Interface */
244 static const struct pci_error_handlers liquidio_vf_err_handler = {
245 .error_detected = liquidio_pcie_error_detected,
246 };
247
248 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
249 {
250 PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
251 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
252 },
253 {
254 0, 0, 0, 0, 0, 0, 0
255 }
256 };
257 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
258
259 static struct pci_driver liquidio_vf_pci_driver = {
260 .name = "LiquidIO_VF",
261 .id_table = liquidio_vf_pci_tbl,
262 .probe = liquidio_vf_probe,
263 .remove = liquidio_vf_remove,
264 .err_handler = &liquidio_vf_err_handler, /* For AER */
265 };
266
267 /**
268 * \brief Print link information
269 * @param netdev network device
270 */
print_link_info(struct net_device * netdev)271 static void print_link_info(struct net_device *netdev)
272 {
273 struct lio *lio = GET_LIO(netdev);
274
275 if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
276 ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
277 struct oct_link_info *linfo = &lio->linfo;
278
279 if (linfo->link.s.link_up) {
280 netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
281 linfo->link.s.speed,
282 (linfo->link.s.duplex) ? "Full" : "Half");
283 } else {
284 netif_info(lio, link, lio->netdev, "Link Down\n");
285 }
286 }
287 }
288
289 /**
290 * \brief Routine to notify MTU change
291 * @param work work_struct data structure
292 */
octnet_link_status_change(struct work_struct * work)293 static void octnet_link_status_change(struct work_struct *work)
294 {
295 struct cavium_wk *wk = (struct cavium_wk *)work;
296 struct lio *lio = (struct lio *)wk->ctxptr;
297
298 /* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
299 * this API is invoked only when new max-MTU of the interface is
300 * less than current MTU.
301 */
302 rtnl_lock();
303 dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
304 rtnl_unlock();
305 }
306
307 /**
308 * \brief Sets up the mtu status change work
309 * @param netdev network device
310 */
setup_link_status_change_wq(struct net_device * netdev)311 static int setup_link_status_change_wq(struct net_device *netdev)
312 {
313 struct lio *lio = GET_LIO(netdev);
314 struct octeon_device *oct = lio->oct_dev;
315
316 lio->link_status_wq.wq = alloc_workqueue("link-status",
317 WQ_MEM_RECLAIM, 0);
318 if (!lio->link_status_wq.wq) {
319 dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
320 return -1;
321 }
322 INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
323 octnet_link_status_change);
324 lio->link_status_wq.wk.ctxptr = lio;
325
326 return 0;
327 }
328
cleanup_link_status_change_wq(struct net_device * netdev)329 static void cleanup_link_status_change_wq(struct net_device *netdev)
330 {
331 struct lio *lio = GET_LIO(netdev);
332
333 if (lio->link_status_wq.wq) {
334 cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
335 destroy_workqueue(lio->link_status_wq.wq);
336 }
337 }
338
339 /**
340 * \brief Update link status
341 * @param netdev network device
342 * @param ls link status structure
343 *
344 * Called on receipt of a link status response from the core application to
345 * update each interface's link status.
346 */
update_link_status(struct net_device * netdev,union oct_link_status * ls)347 static void update_link_status(struct net_device *netdev,
348 union oct_link_status *ls)
349 {
350 struct lio *lio = GET_LIO(netdev);
351 int current_max_mtu = lio->linfo.link.s.mtu;
352 struct octeon_device *oct = lio->oct_dev;
353
354 if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
355 lio->linfo.link.u64 = ls->u64;
356
357 print_link_info(netdev);
358 lio->link_changes++;
359
360 if (lio->linfo.link.s.link_up) {
361 netif_carrier_on(netdev);
362 wake_txqs(netdev);
363 } else {
364 netif_carrier_off(netdev);
365 stop_txqs(netdev);
366 }
367
368 if (lio->linfo.link.s.mtu != current_max_mtu) {
369 dev_info(&oct->pci_dev->dev,
370 "Max MTU Changed from %d to %d\n",
371 current_max_mtu, lio->linfo.link.s.mtu);
372 netdev->max_mtu = lio->linfo.link.s.mtu;
373 }
374
375 if (lio->linfo.link.s.mtu < netdev->mtu) {
376 dev_warn(&oct->pci_dev->dev,
377 "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
378 netdev->mtu, lio->linfo.link.s.mtu);
379 queue_delayed_work(lio->link_status_wq.wq,
380 &lio->link_status_wq.wk.work, 0);
381 }
382 }
383 }
384
385 /**
386 * \brief PCI probe handler
387 * @param pdev PCI device structure
388 * @param ent unused
389 */
390 static int
liquidio_vf_probe(struct pci_dev * pdev,const struct pci_device_id * ent)391 liquidio_vf_probe(struct pci_dev *pdev,
392 const struct pci_device_id *ent __attribute__((unused)))
393 {
394 struct octeon_device *oct_dev = NULL;
395
396 oct_dev = octeon_allocate_device(pdev->device,
397 sizeof(struct octeon_device_priv));
398
399 if (!oct_dev) {
400 dev_err(&pdev->dev, "Unable to allocate device\n");
401 return -ENOMEM;
402 }
403 oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
404
405 dev_info(&pdev->dev, "Initializing device %x:%x.\n",
406 (u32)pdev->vendor, (u32)pdev->device);
407
408 /* Assign octeon_device for this device to the private data area. */
409 pci_set_drvdata(pdev, oct_dev);
410
411 /* set linux specific device pointer */
412 oct_dev->pci_dev = pdev;
413
414 oct_dev->subsystem_id = pdev->subsystem_vendor |
415 (pdev->subsystem_device << 16);
416
417 if (octeon_device_init(oct_dev)) {
418 liquidio_vf_remove(pdev);
419 return -ENOMEM;
420 }
421
422 dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
423
424 return 0;
425 }
426
427 /**
428 * \brief PCI FLR for each Octeon device.
429 * @param oct octeon device
430 */
octeon_pci_flr(struct octeon_device * oct)431 static void octeon_pci_flr(struct octeon_device *oct)
432 {
433 pci_save_state(oct->pci_dev);
434
435 pci_cfg_access_lock(oct->pci_dev);
436
437 /* Quiesce the device completely */
438 pci_write_config_word(oct->pci_dev, PCI_COMMAND,
439 PCI_COMMAND_INTX_DISABLE);
440
441 pcie_flr(oct->pci_dev);
442
443 pci_cfg_access_unlock(oct->pci_dev);
444
445 pci_restore_state(oct->pci_dev);
446 }
447
448 /**
449 *\brief Destroy resources associated with octeon device
450 * @param pdev PCI device structure
451 * @param ent unused
452 */
octeon_destroy_resources(struct octeon_device * oct)453 static void octeon_destroy_resources(struct octeon_device *oct)
454 {
455 struct msix_entry *msix_entries;
456 int i;
457
458 switch (atomic_read(&oct->status)) {
459 case OCT_DEV_RUNNING:
460 case OCT_DEV_CORE_OK:
461 /* No more instructions will be forwarded. */
462 atomic_set(&oct->status, OCT_DEV_IN_RESET);
463
464 oct->app_mode = CVM_DRV_INVALID_APP;
465 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
466 lio_get_state_string(&oct->status));
467
468 schedule_timeout_uninterruptible(HZ / 10);
469
470 /* fallthrough */
471 case OCT_DEV_HOST_OK:
472 /* fallthrough */
473 case OCT_DEV_IO_QUEUES_DONE:
474 if (wait_for_pending_requests(oct))
475 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
476
477 if (lio_wait_for_instr_fetch(oct))
478 dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
479
480 /* Disable the input and output queues now. No more packets will
481 * arrive from Octeon, but we should wait for all packet
482 * processing to finish.
483 */
484 oct->fn_list.disable_io_queues(oct);
485
486 if (lio_wait_for_oq_pkts(oct))
487 dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
488 /* fall through */
489 case OCT_DEV_INTR_SET_DONE:
490 /* Disable interrupts */
491 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
492
493 if (oct->msix_on) {
494 msix_entries = (struct msix_entry *)oct->msix_entries;
495 for (i = 0; i < oct->num_msix_irqs; i++) {
496 if (oct->ioq_vector[i].vector) {
497 irq_set_affinity_hint(
498 msix_entries[i].vector,
499 NULL);
500 free_irq(msix_entries[i].vector,
501 &oct->ioq_vector[i]);
502 oct->ioq_vector[i].vector = 0;
503 }
504 }
505 pci_disable_msix(oct->pci_dev);
506 kfree(oct->msix_entries);
507 oct->msix_entries = NULL;
508 kfree(oct->irq_name_storage);
509 oct->irq_name_storage = NULL;
510 }
511 /* Soft reset the octeon device before exiting */
512 if (oct->pci_dev->reset_fn)
513 octeon_pci_flr(oct);
514 else
515 cn23xx_vf_ask_pf_to_do_flr(oct);
516
517 /* fallthrough */
518 case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
519 octeon_free_ioq_vector(oct);
520
521 /* fallthrough */
522 case OCT_DEV_MBOX_SETUP_DONE:
523 oct->fn_list.free_mbox(oct);
524
525 /* fallthrough */
526 case OCT_DEV_IN_RESET:
527 case OCT_DEV_DROQ_INIT_DONE:
528 mdelay(100);
529 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
530 if (!(oct->io_qmask.oq & BIT_ULL(i)))
531 continue;
532 octeon_delete_droq(oct, i);
533 }
534
535 /* fallthrough */
536 case OCT_DEV_RESP_LIST_INIT_DONE:
537 octeon_delete_response_list(oct);
538
539 /* fallthrough */
540 case OCT_DEV_INSTR_QUEUE_INIT_DONE:
541 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
542 if (!(oct->io_qmask.iq & BIT_ULL(i)))
543 continue;
544 octeon_delete_instr_queue(oct, i);
545 }
546
547 /* fallthrough */
548 case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
549 octeon_free_sc_buffer_pool(oct);
550
551 /* fallthrough */
552 case OCT_DEV_DISPATCH_INIT_DONE:
553 octeon_delete_dispatch_list(oct);
554 cancel_delayed_work_sync(&oct->nic_poll_work.work);
555
556 /* fallthrough */
557 case OCT_DEV_PCI_MAP_DONE:
558 octeon_unmap_pci_barx(oct, 0);
559 octeon_unmap_pci_barx(oct, 1);
560
561 /* fallthrough */
562 case OCT_DEV_PCI_ENABLE_DONE:
563 pci_clear_master(oct->pci_dev);
564 /* Disable the device, releasing the PCI INT */
565 pci_disable_device(oct->pci_dev);
566
567 /* fallthrough */
568 case OCT_DEV_BEGIN_STATE:
569 /* Nothing to be done here either */
570 break;
571 }
572 }
573
574 /**
575 * \brief Callback for rx ctrl
576 * @param status status of request
577 * @param buf pointer to resp structure
578 */
rx_ctl_callback(struct octeon_device * oct,u32 status,void * buf)579 static void rx_ctl_callback(struct octeon_device *oct,
580 u32 status, void *buf)
581 {
582 struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
583 struct liquidio_rx_ctl_context *ctx;
584
585 ctx = (struct liquidio_rx_ctl_context *)sc->ctxptr;
586
587 oct = lio_get_device(ctx->octeon_id);
588 if (status)
589 dev_err(&oct->pci_dev->dev, "rx ctl instruction failed. Status: %llx\n",
590 CVM_CAST64(status));
591 WRITE_ONCE(ctx->cond, 1);
592
593 /* This barrier is required to be sure that the response has been
594 * written fully before waking up the handler
595 */
596 wmb();
597
598 wake_up_interruptible(&ctx->wc);
599 }
600
601 /**
602 * \brief Send Rx control command
603 * @param lio per-network private data
604 * @param start_stop whether to start or stop
605 */
send_rx_ctrl_cmd(struct lio * lio,int start_stop)606 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
607 {
608 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
609 int ctx_size = sizeof(struct liquidio_rx_ctl_context);
610 struct liquidio_rx_ctl_context *ctx;
611 struct octeon_soft_command *sc;
612 union octnet_cmd *ncmd;
613 int retval;
614
615 if (oct->props[lio->ifidx].rx_on == start_stop)
616 return;
617
618 sc = (struct octeon_soft_command *)
619 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
620 16, ctx_size);
621
622 ncmd = (union octnet_cmd *)sc->virtdptr;
623 ctx = (struct liquidio_rx_ctl_context *)sc->ctxptr;
624
625 WRITE_ONCE(ctx->cond, 0);
626 ctx->octeon_id = lio_get_device_id(oct);
627 init_waitqueue_head(&ctx->wc);
628
629 ncmd->u64 = 0;
630 ncmd->s.cmd = OCTNET_CMD_RX_CTL;
631 ncmd->s.param1 = start_stop;
632
633 octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
634
635 sc->iq_no = lio->linfo.txpciq[0].s.q_no;
636
637 octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
638 OPCODE_NIC_CMD, 0, 0, 0);
639
640 sc->callback = rx_ctl_callback;
641 sc->callback_arg = sc;
642 sc->wait_time = 5000;
643
644 retval = octeon_send_soft_command(oct, sc);
645 if (retval == IQ_SEND_FAILED) {
646 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
647 } else {
648 /* Sleep on a wait queue till the cond flag indicates that the
649 * response arrived or timed-out.
650 */
651 if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR)
652 return;
653 oct->props[lio->ifidx].rx_on = start_stop;
654 }
655
656 octeon_free_soft_command(oct, sc);
657 }
658
659 /**
660 * \brief Destroy NIC device interface
661 * @param oct octeon device
662 * @param ifidx which interface to destroy
663 *
664 * Cleanup associated with each interface for an Octeon device when NIC
665 * module is being unloaded or if initialization fails during load.
666 */
liquidio_destroy_nic_device(struct octeon_device * oct,int ifidx)667 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
668 {
669 struct net_device *netdev = oct->props[ifidx].netdev;
670 struct napi_struct *napi, *n;
671 struct lio *lio;
672
673 if (!netdev) {
674 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
675 __func__, ifidx);
676 return;
677 }
678
679 lio = GET_LIO(netdev);
680
681 dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
682
683 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
684 liquidio_stop(netdev);
685
686 if (oct->props[lio->ifidx].napi_enabled == 1) {
687 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
688 napi_disable(napi);
689
690 oct->props[lio->ifidx].napi_enabled = 0;
691
692 oct->droq[0]->ops.poll_mode = 0;
693 }
694
695 /* Delete NAPI */
696 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
697 netif_napi_del(napi);
698
699 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
700 unregister_netdev(netdev);
701
702 cleanup_rx_oom_poll_fn(netdev);
703
704 cleanup_link_status_change_wq(netdev);
705
706 lio_delete_glists(lio);
707
708 free_netdev(netdev);
709
710 oct->props[ifidx].gmxport = -1;
711
712 oct->props[ifidx].netdev = NULL;
713 }
714
715 /**
716 * \brief Stop complete NIC functionality
717 * @param oct octeon device
718 */
liquidio_stop_nic_module(struct octeon_device * oct)719 static int liquidio_stop_nic_module(struct octeon_device *oct)
720 {
721 struct lio *lio;
722 int i, j;
723
724 dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
725 if (!oct->ifcount) {
726 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
727 return 1;
728 }
729
730 spin_lock_bh(&oct->cmd_resp_wqlock);
731 oct->cmd_resp_state = OCT_DRV_OFFLINE;
732 spin_unlock_bh(&oct->cmd_resp_wqlock);
733
734 for (i = 0; i < oct->ifcount; i++) {
735 lio = GET_LIO(oct->props[i].netdev);
736 for (j = 0; j < oct->num_oqs; j++)
737 octeon_unregister_droq_ops(oct,
738 lio->linfo.rxpciq[j].s.q_no);
739 }
740
741 for (i = 0; i < oct->ifcount; i++)
742 liquidio_destroy_nic_device(oct, i);
743
744 dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
745 return 0;
746 }
747
748 /**
749 * \brief Cleans up resources at unload time
750 * @param pdev PCI device structure
751 */
liquidio_vf_remove(struct pci_dev * pdev)752 static void liquidio_vf_remove(struct pci_dev *pdev)
753 {
754 struct octeon_device *oct_dev = pci_get_drvdata(pdev);
755
756 dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
757
758 if (oct_dev->app_mode == CVM_DRV_NIC_APP)
759 liquidio_stop_nic_module(oct_dev);
760
761 /* Reset the octeon device and cleanup all memory allocated for
762 * the octeon device by driver.
763 */
764 octeon_destroy_resources(oct_dev);
765
766 dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
767
768 /* This octeon device has been removed. Update the global
769 * data structure to reflect this. Free the device structure.
770 */
771 octeon_free_device_mem(oct_dev);
772 }
773
774 /**
775 * \brief PCI initialization for each Octeon device.
776 * @param oct octeon device
777 */
octeon_pci_os_setup(struct octeon_device * oct)778 static int octeon_pci_os_setup(struct octeon_device *oct)
779 {
780 #ifdef CONFIG_PCI_IOV
781 /* setup PCI stuff first */
782 if (!oct->pci_dev->physfn)
783 octeon_pci_flr(oct);
784 #endif
785
786 if (pci_enable_device(oct->pci_dev)) {
787 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
788 return 1;
789 }
790
791 if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
792 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
793 pci_disable_device(oct->pci_dev);
794 return 1;
795 }
796
797 /* Enable PCI DMA Master. */
798 pci_set_master(oct->pci_dev);
799
800 return 0;
801 }
802
803 /**
804 * \brief Unmap and free network buffer
805 * @param buf buffer
806 */
free_netbuf(void * buf)807 static void free_netbuf(void *buf)
808 {
809 struct octnet_buf_free_info *finfo;
810 struct sk_buff *skb;
811 struct lio *lio;
812
813 finfo = (struct octnet_buf_free_info *)buf;
814 skb = finfo->skb;
815 lio = finfo->lio;
816
817 dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
818 DMA_TO_DEVICE);
819
820 tx_buffer_free(skb);
821 }
822
823 /**
824 * \brief Unmap and free gather buffer
825 * @param buf buffer
826 */
free_netsgbuf(void * buf)827 static void free_netsgbuf(void *buf)
828 {
829 struct octnet_buf_free_info *finfo;
830 struct octnic_gather *g;
831 struct sk_buff *skb;
832 int i, frags, iq;
833 struct lio *lio;
834
835 finfo = (struct octnet_buf_free_info *)buf;
836 skb = finfo->skb;
837 lio = finfo->lio;
838 g = finfo->g;
839 frags = skb_shinfo(skb)->nr_frags;
840
841 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
842 g->sg[0].ptr[0], (skb->len - skb->data_len),
843 DMA_TO_DEVICE);
844
845 i = 1;
846 while (frags--) {
847 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
848
849 pci_unmap_page((lio->oct_dev)->pci_dev,
850 g->sg[(i >> 2)].ptr[(i & 3)],
851 frag->size, DMA_TO_DEVICE);
852 i++;
853 }
854
855 iq = skb_iq(lio->oct_dev, skb);
856
857 spin_lock(&lio->glist_lock[iq]);
858 list_add_tail(&g->list, &lio->glist[iq]);
859 spin_unlock(&lio->glist_lock[iq]);
860
861 tx_buffer_free(skb);
862 }
863
864 /**
865 * \brief Unmap and free gather buffer with response
866 * @param buf buffer
867 */
free_netsgbuf_with_resp(void * buf)868 static void free_netsgbuf_with_resp(void *buf)
869 {
870 struct octnet_buf_free_info *finfo;
871 struct octeon_soft_command *sc;
872 struct octnic_gather *g;
873 struct sk_buff *skb;
874 int i, frags, iq;
875 struct lio *lio;
876
877 sc = (struct octeon_soft_command *)buf;
878 skb = (struct sk_buff *)sc->callback_arg;
879 finfo = (struct octnet_buf_free_info *)&skb->cb;
880
881 lio = finfo->lio;
882 g = finfo->g;
883 frags = skb_shinfo(skb)->nr_frags;
884
885 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
886 g->sg[0].ptr[0], (skb->len - skb->data_len),
887 DMA_TO_DEVICE);
888
889 i = 1;
890 while (frags--) {
891 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i - 1];
892
893 pci_unmap_page((lio->oct_dev)->pci_dev,
894 g->sg[(i >> 2)].ptr[(i & 3)],
895 frag->size, DMA_TO_DEVICE);
896 i++;
897 }
898
899 iq = skb_iq(lio->oct_dev, skb);
900
901 spin_lock(&lio->glist_lock[iq]);
902 list_add_tail(&g->list, &lio->glist[iq]);
903 spin_unlock(&lio->glist_lock[iq]);
904
905 /* Don't free the skb yet */
906 }
907
908 /**
909 * \brief Net device open for LiquidIO
910 * @param netdev network device
911 */
liquidio_open(struct net_device * netdev)912 static int liquidio_open(struct net_device *netdev)
913 {
914 struct lio *lio = GET_LIO(netdev);
915 struct octeon_device *oct = lio->oct_dev;
916 struct napi_struct *napi, *n;
917
918 if (!oct->props[lio->ifidx].napi_enabled) {
919 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
920 napi_enable(napi);
921
922 oct->props[lio->ifidx].napi_enabled = 1;
923
924 oct->droq[0]->ops.poll_mode = 1;
925 }
926
927 ifstate_set(lio, LIO_IFSTATE_RUNNING);
928
929 /* Ready for link status updates */
930 lio->intf_open = 1;
931
932 netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
933 start_txqs(netdev);
934
935 /* tell Octeon to start forwarding packets to host */
936 send_rx_ctrl_cmd(lio, 1);
937
938 dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
939
940 return 0;
941 }
942
943 /**
944 * \brief Net device stop for LiquidIO
945 * @param netdev network device
946 */
liquidio_stop(struct net_device * netdev)947 static int liquidio_stop(struct net_device *netdev)
948 {
949 struct lio *lio = GET_LIO(netdev);
950 struct octeon_device *oct = lio->oct_dev;
951 struct napi_struct *napi, *n;
952
953 /* tell Octeon to stop forwarding packets to host */
954 send_rx_ctrl_cmd(lio, 0);
955
956 netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
957 /* Inform that netif carrier is down */
958 lio->intf_open = 0;
959 lio->linfo.link.s.link_up = 0;
960
961 netif_carrier_off(netdev);
962 lio->link_changes++;
963
964 ifstate_reset(lio, LIO_IFSTATE_RUNNING);
965
966 stop_txqs(netdev);
967
968 /* Wait for any pending Rx descriptors */
969 if (lio_wait_for_clean_oq(oct))
970 netif_info(lio, rx_err, lio->netdev,
971 "Proceeding with stop interface after partial RX desc processing\n");
972
973 if (oct->props[lio->ifidx].napi_enabled == 1) {
974 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
975 napi_disable(napi);
976
977 oct->props[lio->ifidx].napi_enabled = 0;
978
979 oct->droq[0]->ops.poll_mode = 0;
980 }
981
982 dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
983
984 return 0;
985 }
986
987 /**
988 * \brief Converts a mask based on net device flags
989 * @param netdev network device
990 *
991 * This routine generates a octnet_ifflags mask from the net device flags
992 * received from the OS.
993 */
get_new_flags(struct net_device * netdev)994 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
995 {
996 enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
997
998 if (netdev->flags & IFF_PROMISC)
999 f |= OCTNET_IFFLAG_PROMISC;
1000
1001 if (netdev->flags & IFF_ALLMULTI)
1002 f |= OCTNET_IFFLAG_ALLMULTI;
1003
1004 if (netdev->flags & IFF_MULTICAST) {
1005 f |= OCTNET_IFFLAG_MULTICAST;
1006
1007 /* Accept all multicast addresses if there are more than we
1008 * can handle
1009 */
1010 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1011 f |= OCTNET_IFFLAG_ALLMULTI;
1012 }
1013
1014 if (netdev->flags & IFF_BROADCAST)
1015 f |= OCTNET_IFFLAG_BROADCAST;
1016
1017 return f;
1018 }
1019
liquidio_set_uc_list(struct net_device * netdev)1020 static void liquidio_set_uc_list(struct net_device *netdev)
1021 {
1022 struct lio *lio = GET_LIO(netdev);
1023 struct octeon_device *oct = lio->oct_dev;
1024 struct octnic_ctrl_pkt nctrl;
1025 struct netdev_hw_addr *ha;
1026 u64 *mac;
1027
1028 if (lio->netdev_uc_count == netdev_uc_count(netdev))
1029 return;
1030
1031 if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1032 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1033 return;
1034 }
1035
1036 lio->netdev_uc_count = netdev_uc_count(netdev);
1037
1038 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1039 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1040 nctrl.ncmd.s.more = lio->netdev_uc_count;
1041 nctrl.ncmd.s.param1 = oct->vf_num;
1042 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1043 nctrl.netpndev = (u64)netdev;
1044 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1045
1046 /* copy all the addresses into the udd */
1047 mac = &nctrl.udd[0];
1048 netdev_for_each_uc_addr(ha, netdev) {
1049 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1050 mac++;
1051 }
1052
1053 octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1054 }
1055
1056 /**
1057 * \brief Net device set_multicast_list
1058 * @param netdev network device
1059 */
liquidio_set_mcast_list(struct net_device * netdev)1060 static void liquidio_set_mcast_list(struct net_device *netdev)
1061 {
1062 int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1063 struct lio *lio = GET_LIO(netdev);
1064 struct octeon_device *oct = lio->oct_dev;
1065 struct octnic_ctrl_pkt nctrl;
1066 struct netdev_hw_addr *ha;
1067 u64 *mc;
1068 int ret;
1069
1070 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1071
1072 /* Create a ctrl pkt command to be sent to core app. */
1073 nctrl.ncmd.u64 = 0;
1074 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1075 nctrl.ncmd.s.param1 = get_new_flags(netdev);
1076 nctrl.ncmd.s.param2 = mc_count;
1077 nctrl.ncmd.s.more = mc_count;
1078 nctrl.netpndev = (u64)netdev;
1079 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1080
1081 /* copy all the addresses into the udd */
1082 mc = &nctrl.udd[0];
1083 netdev_for_each_mc_addr(ha, netdev) {
1084 *mc = 0;
1085 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1086 /* no need to swap bytes */
1087 if (++mc > &nctrl.udd[mc_count])
1088 break;
1089 }
1090
1091 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1092
1093 /* Apparently, any activity in this call from the kernel has to
1094 * be atomic. So we won't wait for response.
1095 */
1096 nctrl.wait_time = 0;
1097
1098 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1099 if (ret < 0) {
1100 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1101 ret);
1102 }
1103
1104 liquidio_set_uc_list(netdev);
1105 }
1106
1107 /**
1108 * \brief Net device set_mac_address
1109 * @param netdev network device
1110 */
liquidio_set_mac(struct net_device * netdev,void * p)1111 static int liquidio_set_mac(struct net_device *netdev, void *p)
1112 {
1113 struct sockaddr *addr = (struct sockaddr *)p;
1114 struct lio *lio = GET_LIO(netdev);
1115 struct octeon_device *oct = lio->oct_dev;
1116 struct octnic_ctrl_pkt nctrl;
1117 int ret = 0;
1118
1119 if (!is_valid_ether_addr(addr->sa_data))
1120 return -EADDRNOTAVAIL;
1121
1122 if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1123 return 0;
1124
1125 if (lio->linfo.macaddr_is_admin_asgnd)
1126 return -EPERM;
1127
1128 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1129
1130 nctrl.ncmd.u64 = 0;
1131 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1132 nctrl.ncmd.s.param1 = 0;
1133 nctrl.ncmd.s.more = 1;
1134 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1135 nctrl.netpndev = (u64)netdev;
1136 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1137 nctrl.wait_time = 100;
1138
1139 nctrl.udd[0] = 0;
1140 /* The MAC Address is presented in network byte order. */
1141 ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1142
1143 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1144 if (ret < 0) {
1145 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1146 return -ENOMEM;
1147 }
1148 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1149 ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1150
1151 return 0;
1152 }
1153
1154 static void
liquidio_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * lstats)1155 liquidio_get_stats64(struct net_device *netdev,
1156 struct rtnl_link_stats64 *lstats)
1157 {
1158 struct lio *lio = GET_LIO(netdev);
1159 struct octeon_device *oct;
1160 u64 pkts = 0, drop = 0, bytes = 0;
1161 struct oct_droq_stats *oq_stats;
1162 struct oct_iq_stats *iq_stats;
1163 int i, iq_no, oq_no;
1164
1165 oct = lio->oct_dev;
1166
1167 if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1168 return;
1169
1170 for (i = 0; i < oct->num_iqs; i++) {
1171 iq_no = lio->linfo.txpciq[i].s.q_no;
1172 iq_stats = &oct->instr_queue[iq_no]->stats;
1173 pkts += iq_stats->tx_done;
1174 drop += iq_stats->tx_dropped;
1175 bytes += iq_stats->tx_tot_bytes;
1176 }
1177
1178 lstats->tx_packets = pkts;
1179 lstats->tx_bytes = bytes;
1180 lstats->tx_dropped = drop;
1181
1182 pkts = 0;
1183 drop = 0;
1184 bytes = 0;
1185
1186 for (i = 0; i < oct->num_oqs; i++) {
1187 oq_no = lio->linfo.rxpciq[i].s.q_no;
1188 oq_stats = &oct->droq[oq_no]->stats;
1189 pkts += oq_stats->rx_pkts_received;
1190 drop += (oq_stats->rx_dropped +
1191 oq_stats->dropped_nodispatch +
1192 oq_stats->dropped_toomany +
1193 oq_stats->dropped_nomem);
1194 bytes += oq_stats->rx_bytes_received;
1195 }
1196
1197 lstats->rx_bytes = bytes;
1198 lstats->rx_packets = pkts;
1199 lstats->rx_dropped = drop;
1200
1201 octnet_get_link_stats(netdev);
1202 lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1203
1204 /* detailed rx_errors: */
1205 lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1206 /* recved pkt with crc error */
1207 lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1208 /* recv'd frame alignment error */
1209 lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1210
1211 lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1212 lstats->rx_frame_errors;
1213
1214 /* detailed tx_errors */
1215 lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1216 lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1217
1218 lstats->tx_errors = lstats->tx_aborted_errors +
1219 lstats->tx_carrier_errors;
1220 }
1221
1222 /**
1223 * \brief Handler for SIOCSHWTSTAMP ioctl
1224 * @param netdev network device
1225 * @param ifr interface request
1226 * @param cmd command
1227 */
hwtstamp_ioctl(struct net_device * netdev,struct ifreq * ifr)1228 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1229 {
1230 struct lio *lio = GET_LIO(netdev);
1231 struct hwtstamp_config conf;
1232
1233 if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1234 return -EFAULT;
1235
1236 if (conf.flags)
1237 return -EINVAL;
1238
1239 switch (conf.tx_type) {
1240 case HWTSTAMP_TX_ON:
1241 case HWTSTAMP_TX_OFF:
1242 break;
1243 default:
1244 return -ERANGE;
1245 }
1246
1247 switch (conf.rx_filter) {
1248 case HWTSTAMP_FILTER_NONE:
1249 break;
1250 case HWTSTAMP_FILTER_ALL:
1251 case HWTSTAMP_FILTER_SOME:
1252 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1253 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1254 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1255 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1256 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1257 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1258 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1259 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1260 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1261 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1262 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1263 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1264 case HWTSTAMP_FILTER_NTP_ALL:
1265 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1266 break;
1267 default:
1268 return -ERANGE;
1269 }
1270
1271 if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1272 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1273
1274 else
1275 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1276
1277 return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1278 }
1279
1280 /**
1281 * \brief ioctl handler
1282 * @param netdev network device
1283 * @param ifr interface request
1284 * @param cmd command
1285 */
liquidio_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)1286 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1287 {
1288 switch (cmd) {
1289 case SIOCSHWTSTAMP:
1290 return hwtstamp_ioctl(netdev, ifr);
1291 default:
1292 return -EOPNOTSUPP;
1293 }
1294 }
1295
handle_timestamp(struct octeon_device * oct,u32 status,void * buf)1296 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1297 {
1298 struct sk_buff *skb = (struct sk_buff *)buf;
1299 struct octnet_buf_free_info *finfo;
1300 struct oct_timestamp_resp *resp;
1301 struct octeon_soft_command *sc;
1302 struct lio *lio;
1303
1304 finfo = (struct octnet_buf_free_info *)skb->cb;
1305 lio = finfo->lio;
1306 sc = finfo->sc;
1307 oct = lio->oct_dev;
1308 resp = (struct oct_timestamp_resp *)sc->virtrptr;
1309
1310 if (status != OCTEON_REQUEST_DONE) {
1311 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1312 CVM_CAST64(status));
1313 resp->timestamp = 0;
1314 }
1315
1316 octeon_swap_8B_data(&resp->timestamp, 1);
1317
1318 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1319 struct skb_shared_hwtstamps ts;
1320 u64 ns = resp->timestamp;
1321
1322 netif_info(lio, tx_done, lio->netdev,
1323 "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1324 skb, (unsigned long long)ns);
1325 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1326 skb_tstamp_tx(skb, &ts);
1327 }
1328
1329 octeon_free_soft_command(oct, sc);
1330 tx_buffer_free(skb);
1331 }
1332
1333 /* \brief Send a data packet that will be timestamped
1334 * @param oct octeon device
1335 * @param ndata pointer to network data
1336 * @param finfo pointer to private network data
1337 */
send_nic_timestamp_pkt(struct octeon_device * oct,struct octnic_data_pkt * ndata,struct octnet_buf_free_info * finfo,int xmit_more)1338 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1339 struct octnic_data_pkt *ndata,
1340 struct octnet_buf_free_info *finfo,
1341 int xmit_more)
1342 {
1343 struct octeon_soft_command *sc;
1344 int ring_doorbell;
1345 struct lio *lio;
1346 int retval;
1347 u32 len;
1348
1349 lio = finfo->lio;
1350
1351 sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1352 sizeof(struct oct_timestamp_resp));
1353 finfo->sc = sc;
1354
1355 if (!sc) {
1356 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1357 return IQ_SEND_FAILED;
1358 }
1359
1360 if (ndata->reqtype == REQTYPE_NORESP_NET)
1361 ndata->reqtype = REQTYPE_RESP_NET;
1362 else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1363 ndata->reqtype = REQTYPE_RESP_NET_SG;
1364
1365 sc->callback = handle_timestamp;
1366 sc->callback_arg = finfo->skb;
1367 sc->iq_no = ndata->q_no;
1368
1369 len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1370
1371 ring_doorbell = !xmit_more;
1372
1373 retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1374 sc, len, ndata->reqtype);
1375
1376 if (retval == IQ_SEND_FAILED) {
1377 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1378 retval);
1379 octeon_free_soft_command(oct, sc);
1380 } else {
1381 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1382 }
1383
1384 return retval;
1385 }
1386
1387 /** \brief Transmit networks packets to the Octeon interface
1388 * @param skbuff skbuff struct to be passed to network layer.
1389 * @param netdev pointer to network device
1390 * @returns whether the packet was transmitted to the device okay or not
1391 * (NETDEV_TX_OK or NETDEV_TX_BUSY)
1392 */
liquidio_xmit(struct sk_buff * skb,struct net_device * netdev)1393 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1394 {
1395 struct octnet_buf_free_info *finfo;
1396 union octnic_cmd_setup cmdsetup;
1397 struct octnic_data_pkt ndata;
1398 struct octeon_instr_irh *irh;
1399 struct oct_iq_stats *stats;
1400 struct octeon_device *oct;
1401 int q_idx = 0, iq_no = 0;
1402 union tx_info *tx_info;
1403 int xmit_more = 0;
1404 struct lio *lio;
1405 int status = 0;
1406 u64 dptr = 0;
1407 u32 tag = 0;
1408 int j;
1409
1410 lio = GET_LIO(netdev);
1411 oct = lio->oct_dev;
1412
1413 q_idx = skb_iq(lio->oct_dev, skb);
1414 tag = q_idx;
1415 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1416
1417 stats = &oct->instr_queue[iq_no]->stats;
1418
1419 /* Check for all conditions in which the current packet cannot be
1420 * transmitted.
1421 */
1422 if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1423 (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1424 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1425 lio->linfo.link.s.link_up);
1426 goto lio_xmit_failed;
1427 }
1428
1429 /* Use space in skb->cb to store info used to unmap and
1430 * free the buffers.
1431 */
1432 finfo = (struct octnet_buf_free_info *)skb->cb;
1433 finfo->lio = lio;
1434 finfo->skb = skb;
1435 finfo->sc = NULL;
1436
1437 /* Prepare the attributes for the data to be passed to OSI. */
1438 memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1439
1440 ndata.buf = finfo;
1441
1442 ndata.q_no = iq_no;
1443
1444 if (octnet_iq_is_full(oct, ndata.q_no)) {
1445 /* defer sending if queue is full */
1446 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1447 ndata.q_no);
1448 stats->tx_iq_busy++;
1449 return NETDEV_TX_BUSY;
1450 }
1451
1452 ndata.datasize = skb->len;
1453
1454 cmdsetup.u64 = 0;
1455 cmdsetup.s.iq_no = iq_no;
1456
1457 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1458 if (skb->encapsulation) {
1459 cmdsetup.s.tnl_csum = 1;
1460 stats->tx_vxlan++;
1461 } else {
1462 cmdsetup.s.transport_csum = 1;
1463 }
1464 }
1465 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1466 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1467 cmdsetup.s.timestamp = 1;
1468 }
1469
1470 if (!skb_shinfo(skb)->nr_frags) {
1471 cmdsetup.s.u.datasize = skb->len;
1472 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1473 /* Offload checksum calculation for TCP/UDP packets */
1474 dptr = dma_map_single(&oct->pci_dev->dev,
1475 skb->data,
1476 skb->len,
1477 DMA_TO_DEVICE);
1478 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1479 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1480 __func__);
1481 return NETDEV_TX_BUSY;
1482 }
1483
1484 ndata.cmd.cmd3.dptr = dptr;
1485 finfo->dptr = dptr;
1486 ndata.reqtype = REQTYPE_NORESP_NET;
1487
1488 } else {
1489 struct skb_frag_struct *frag;
1490 struct octnic_gather *g;
1491 int i, frags;
1492
1493 spin_lock(&lio->glist_lock[q_idx]);
1494 g = (struct octnic_gather *)
1495 lio_list_delete_head(&lio->glist[q_idx]);
1496 spin_unlock(&lio->glist_lock[q_idx]);
1497
1498 if (!g) {
1499 netif_info(lio, tx_err, lio->netdev,
1500 "Transmit scatter gather: glist null!\n");
1501 goto lio_xmit_failed;
1502 }
1503
1504 cmdsetup.s.gather = 1;
1505 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1506 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1507
1508 memset(g->sg, 0, g->sg_size);
1509
1510 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1511 skb->data,
1512 (skb->len - skb->data_len),
1513 DMA_TO_DEVICE);
1514 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1515 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1516 __func__);
1517 return NETDEV_TX_BUSY;
1518 }
1519 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1520
1521 frags = skb_shinfo(skb)->nr_frags;
1522 i = 1;
1523 while (frags--) {
1524 frag = &skb_shinfo(skb)->frags[i - 1];
1525
1526 g->sg[(i >> 2)].ptr[(i & 3)] =
1527 dma_map_page(&oct->pci_dev->dev,
1528 frag->page.p,
1529 frag->page_offset,
1530 frag->size,
1531 DMA_TO_DEVICE);
1532 if (dma_mapping_error(&oct->pci_dev->dev,
1533 g->sg[i >> 2].ptr[i & 3])) {
1534 dma_unmap_single(&oct->pci_dev->dev,
1535 g->sg[0].ptr[0],
1536 skb->len - skb->data_len,
1537 DMA_TO_DEVICE);
1538 for (j = 1; j < i; j++) {
1539 frag = &skb_shinfo(skb)->frags[j - 1];
1540 dma_unmap_page(&oct->pci_dev->dev,
1541 g->sg[j >> 2].ptr[j & 3],
1542 frag->size,
1543 DMA_TO_DEVICE);
1544 }
1545 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1546 __func__);
1547 return NETDEV_TX_BUSY;
1548 }
1549
1550 add_sg_size(&g->sg[(i >> 2)], frag->size, (i & 3));
1551 i++;
1552 }
1553
1554 dptr = g->sg_dma_ptr;
1555
1556 ndata.cmd.cmd3.dptr = dptr;
1557 finfo->dptr = dptr;
1558 finfo->g = g;
1559
1560 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1561 }
1562
1563 irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1564 tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1565
1566 if (skb_shinfo(skb)->gso_size) {
1567 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1568 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1569 }
1570
1571 /* HW insert VLAN tag */
1572 if (skb_vlan_tag_present(skb)) {
1573 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1574 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1575 }
1576
1577 xmit_more = skb->xmit_more;
1578
1579 if (unlikely(cmdsetup.s.timestamp))
1580 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1581 else
1582 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1583 if (status == IQ_SEND_FAILED)
1584 goto lio_xmit_failed;
1585
1586 netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1587
1588 if (status == IQ_SEND_STOP) {
1589 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1590 iq_no);
1591 netif_stop_subqueue(netdev, q_idx);
1592 }
1593
1594 netif_trans_update(netdev);
1595
1596 if (tx_info->s.gso_segs)
1597 stats->tx_done += tx_info->s.gso_segs;
1598 else
1599 stats->tx_done++;
1600 stats->tx_tot_bytes += ndata.datasize;
1601
1602 return NETDEV_TX_OK;
1603
1604 lio_xmit_failed:
1605 stats->tx_dropped++;
1606 netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1607 iq_no, stats->tx_dropped);
1608 if (dptr)
1609 dma_unmap_single(&oct->pci_dev->dev, dptr,
1610 ndata.datasize, DMA_TO_DEVICE);
1611
1612 octeon_ring_doorbell_locked(oct, iq_no);
1613
1614 tx_buffer_free(skb);
1615 return NETDEV_TX_OK;
1616 }
1617
1618 /** \brief Network device Tx timeout
1619 * @param netdev pointer to network device
1620 */
liquidio_tx_timeout(struct net_device * netdev)1621 static void liquidio_tx_timeout(struct net_device *netdev)
1622 {
1623 struct lio *lio;
1624
1625 lio = GET_LIO(netdev);
1626
1627 netif_info(lio, tx_err, lio->netdev,
1628 "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1629 netdev->stats.tx_dropped);
1630 netif_trans_update(netdev);
1631 wake_txqs(netdev);
1632 }
1633
1634 static int
liquidio_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)1635 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1636 __be16 proto __attribute__((unused)), u16 vid)
1637 {
1638 struct lio *lio = GET_LIO(netdev);
1639 struct octeon_device *oct = lio->oct_dev;
1640 struct octnic_ctrl_pkt nctrl;
1641 struct completion compl;
1642 u16 response_code;
1643 int ret = 0;
1644
1645 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1646
1647 nctrl.ncmd.u64 = 0;
1648 nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1649 nctrl.ncmd.s.param1 = vid;
1650 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1651 nctrl.wait_time = 100;
1652 nctrl.netpndev = (u64)netdev;
1653 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1654 init_completion(&compl);
1655 nctrl.completion = &compl;
1656 nctrl.response_code = &response_code;
1657
1658 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1659 if (ret < 0) {
1660 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1661 ret);
1662 return -EIO;
1663 }
1664
1665 if (!wait_for_completion_timeout(&compl,
1666 msecs_to_jiffies(nctrl.wait_time)))
1667 return -EPERM;
1668
1669 if (READ_ONCE(response_code))
1670 return -EPERM;
1671
1672 return 0;
1673 }
1674
1675 static int
liquidio_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)1676 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1677 __be16 proto __attribute__((unused)), u16 vid)
1678 {
1679 struct lio *lio = GET_LIO(netdev);
1680 struct octeon_device *oct = lio->oct_dev;
1681 struct octnic_ctrl_pkt nctrl;
1682 int ret = 0;
1683
1684 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1685
1686 nctrl.ncmd.u64 = 0;
1687 nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1688 nctrl.ncmd.s.param1 = vid;
1689 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1690 nctrl.wait_time = 100;
1691 nctrl.netpndev = (u64)netdev;
1692 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1693
1694 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1695 if (ret < 0) {
1696 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1697 ret);
1698 }
1699 return ret;
1700 }
1701
1702 /** Sending command to enable/disable RX checksum offload
1703 * @param netdev pointer to network device
1704 * @param command OCTNET_CMD_TNL_RX_CSUM_CTL
1705 * @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
1706 * OCTNET_CMD_RXCSUM_DISABLE
1707 * @returns SUCCESS or FAILURE
1708 */
liquidio_set_rxcsum_command(struct net_device * netdev,int command,u8 rx_cmd)1709 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1710 u8 rx_cmd)
1711 {
1712 struct lio *lio = GET_LIO(netdev);
1713 struct octeon_device *oct = lio->oct_dev;
1714 struct octnic_ctrl_pkt nctrl;
1715 int ret = 0;
1716
1717 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1718
1719 nctrl.ncmd.u64 = 0;
1720 nctrl.ncmd.s.cmd = command;
1721 nctrl.ncmd.s.param1 = rx_cmd;
1722 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1723 nctrl.wait_time = 100;
1724 nctrl.netpndev = (u64)netdev;
1725 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1726
1727 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1728 if (ret < 0) {
1729 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1730 ret);
1731 }
1732 return ret;
1733 }
1734
1735 /** Sending command to add/delete VxLAN UDP port to firmware
1736 * @param netdev pointer to network device
1737 * @param command OCTNET_CMD_VXLAN_PORT_CONFIG
1738 * @param vxlan_port VxLAN port to be added or deleted
1739 * @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
1740 * OCTNET_CMD_VXLAN_PORT_DEL
1741 * @returns SUCCESS or FAILURE
1742 */
liquidio_vxlan_port_command(struct net_device * netdev,int command,u16 vxlan_port,u8 vxlan_cmd_bit)1743 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1744 u16 vxlan_port, u8 vxlan_cmd_bit)
1745 {
1746 struct lio *lio = GET_LIO(netdev);
1747 struct octeon_device *oct = lio->oct_dev;
1748 struct octnic_ctrl_pkt nctrl;
1749 int ret = 0;
1750
1751 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1752
1753 nctrl.ncmd.u64 = 0;
1754 nctrl.ncmd.s.cmd = command;
1755 nctrl.ncmd.s.more = vxlan_cmd_bit;
1756 nctrl.ncmd.s.param1 = vxlan_port;
1757 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1758 nctrl.wait_time = 100;
1759 nctrl.netpndev = (u64)netdev;
1760 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1761
1762 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1763 if (ret < 0) {
1764 dev_err(&oct->pci_dev->dev,
1765 "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1766 ret);
1767 }
1768 return ret;
1769 }
1770
1771 /** \brief Net device fix features
1772 * @param netdev pointer to network device
1773 * @param request features requested
1774 * @returns updated features list
1775 */
liquidio_fix_features(struct net_device * netdev,netdev_features_t request)1776 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1777 netdev_features_t request)
1778 {
1779 struct lio *lio = netdev_priv(netdev);
1780
1781 if ((request & NETIF_F_RXCSUM) &&
1782 !(lio->dev_capability & NETIF_F_RXCSUM))
1783 request &= ~NETIF_F_RXCSUM;
1784
1785 if ((request & NETIF_F_HW_CSUM) &&
1786 !(lio->dev_capability & NETIF_F_HW_CSUM))
1787 request &= ~NETIF_F_HW_CSUM;
1788
1789 if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1790 request &= ~NETIF_F_TSO;
1791
1792 if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1793 request &= ~NETIF_F_TSO6;
1794
1795 if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1796 request &= ~NETIF_F_LRO;
1797
1798 /* Disable LRO if RXCSUM is off */
1799 if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1800 (lio->dev_capability & NETIF_F_LRO))
1801 request &= ~NETIF_F_LRO;
1802
1803 return request;
1804 }
1805
1806 /** \brief Net device set features
1807 * @param netdev pointer to network device
1808 * @param features features to enable/disable
1809 */
liquidio_set_features(struct net_device * netdev,netdev_features_t features)1810 static int liquidio_set_features(struct net_device *netdev,
1811 netdev_features_t features)
1812 {
1813 struct lio *lio = netdev_priv(netdev);
1814
1815 if (!((netdev->features ^ features) & NETIF_F_LRO))
1816 return 0;
1817
1818 if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1819 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1820 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1821 else if (!(features & NETIF_F_LRO) &&
1822 (lio->dev_capability & NETIF_F_LRO))
1823 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1824 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1825 if (!(netdev->features & NETIF_F_RXCSUM) &&
1826 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1827 (features & NETIF_F_RXCSUM))
1828 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1829 OCTNET_CMD_RXCSUM_ENABLE);
1830 else if ((netdev->features & NETIF_F_RXCSUM) &&
1831 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1832 !(features & NETIF_F_RXCSUM))
1833 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1834 OCTNET_CMD_RXCSUM_DISABLE);
1835
1836 return 0;
1837 }
1838
liquidio_add_vxlan_port(struct net_device * netdev,struct udp_tunnel_info * ti)1839 static void liquidio_add_vxlan_port(struct net_device *netdev,
1840 struct udp_tunnel_info *ti)
1841 {
1842 if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1843 return;
1844
1845 liquidio_vxlan_port_command(netdev,
1846 OCTNET_CMD_VXLAN_PORT_CONFIG,
1847 htons(ti->port),
1848 OCTNET_CMD_VXLAN_PORT_ADD);
1849 }
1850
liquidio_del_vxlan_port(struct net_device * netdev,struct udp_tunnel_info * ti)1851 static void liquidio_del_vxlan_port(struct net_device *netdev,
1852 struct udp_tunnel_info *ti)
1853 {
1854 if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1855 return;
1856
1857 liquidio_vxlan_port_command(netdev,
1858 OCTNET_CMD_VXLAN_PORT_CONFIG,
1859 htons(ti->port),
1860 OCTNET_CMD_VXLAN_PORT_DEL);
1861 }
1862
1863 static const struct net_device_ops lionetdevops = {
1864 .ndo_open = liquidio_open,
1865 .ndo_stop = liquidio_stop,
1866 .ndo_start_xmit = liquidio_xmit,
1867 .ndo_get_stats64 = liquidio_get_stats64,
1868 .ndo_set_mac_address = liquidio_set_mac,
1869 .ndo_set_rx_mode = liquidio_set_mcast_list,
1870 .ndo_tx_timeout = liquidio_tx_timeout,
1871 .ndo_vlan_rx_add_vid = liquidio_vlan_rx_add_vid,
1872 .ndo_vlan_rx_kill_vid = liquidio_vlan_rx_kill_vid,
1873 .ndo_change_mtu = liquidio_change_mtu,
1874 .ndo_do_ioctl = liquidio_ioctl,
1875 .ndo_fix_features = liquidio_fix_features,
1876 .ndo_set_features = liquidio_set_features,
1877 .ndo_udp_tunnel_add = liquidio_add_vxlan_port,
1878 .ndo_udp_tunnel_del = liquidio_del_vxlan_port,
1879 };
1880
lio_nic_info(struct octeon_recv_info * recv_info,void * buf)1881 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1882 {
1883 struct octeon_device *oct = (struct octeon_device *)buf;
1884 struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1885 union oct_link_status *ls;
1886 int gmxport = 0;
1887 int i;
1888
1889 if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1890 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1891 recv_pkt->buffer_size[0],
1892 recv_pkt->rh.r_nic_info.gmxport);
1893 goto nic_info_err;
1894 }
1895
1896 gmxport = recv_pkt->rh.r_nic_info.gmxport;
1897 ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1898 OCT_DROQ_INFO_SIZE);
1899
1900 octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1901
1902 for (i = 0; i < oct->ifcount; i++) {
1903 if (oct->props[i].gmxport == gmxport) {
1904 update_link_status(oct->props[i].netdev, ls);
1905 break;
1906 }
1907 }
1908
1909 nic_info_err:
1910 for (i = 0; i < recv_pkt->buffer_count; i++)
1911 recv_buffer_free(recv_pkt->buffer_ptr[i]);
1912 octeon_free_recv_info(recv_info);
1913 return 0;
1914 }
1915
1916 /**
1917 * \brief Setup network interfaces
1918 * @param octeon_dev octeon device
1919 *
1920 * Called during init time for each device. It assumes the NIC
1921 * is already up and running. The link information for each
1922 * interface is passed in link_info.
1923 */
setup_nic_devices(struct octeon_device * octeon_dev)1924 static int setup_nic_devices(struct octeon_device *octeon_dev)
1925 {
1926 int retval, num_iqueues, num_oqueues;
1927 struct liquidio_if_cfg_context *ctx;
1928 u32 resp_size, ctx_size, data_size;
1929 struct liquidio_if_cfg_resp *resp;
1930 struct octeon_soft_command *sc;
1931 union oct_nic_if_cfg if_cfg;
1932 struct octdev_props *props;
1933 struct net_device *netdev;
1934 struct lio_version *vdata;
1935 struct lio *lio = NULL;
1936 u8 mac[ETH_ALEN], i, j;
1937 u32 ifidx_or_pfnum;
1938
1939 ifidx_or_pfnum = octeon_dev->pf_num;
1940
1941 /* This is to handle link status changes */
1942 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1943 lio_nic_info, octeon_dev);
1944
1945 /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1946 * They are handled directly.
1947 */
1948 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1949 free_netbuf);
1950
1951 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1952 free_netsgbuf);
1953
1954 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1955 free_netsgbuf_with_resp);
1956
1957 for (i = 0; i < octeon_dev->ifcount; i++) {
1958 resp_size = sizeof(struct liquidio_if_cfg_resp);
1959 ctx_size = sizeof(struct liquidio_if_cfg_context);
1960 data_size = sizeof(struct lio_version);
1961 sc = (struct octeon_soft_command *)
1962 octeon_alloc_soft_command(octeon_dev, data_size,
1963 resp_size, ctx_size);
1964 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1965 ctx = (struct liquidio_if_cfg_context *)sc->ctxptr;
1966 vdata = (struct lio_version *)sc->virtdptr;
1967
1968 *((u64 *)vdata) = 0;
1969 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1970 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1971 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1972
1973 WRITE_ONCE(ctx->cond, 0);
1974 ctx->octeon_id = lio_get_device_id(octeon_dev);
1975 init_waitqueue_head(&ctx->wc);
1976
1977 if_cfg.u64 = 0;
1978
1979 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1980 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1981 if_cfg.s.base_queue = 0;
1982
1983 sc->iq_no = 0;
1984
1985 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1986 OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1987 0);
1988
1989 sc->callback = lio_if_cfg_callback;
1990 sc->callback_arg = sc;
1991 sc->wait_time = 5000;
1992
1993 retval = octeon_send_soft_command(octeon_dev, sc);
1994 if (retval == IQ_SEND_FAILED) {
1995 dev_err(&octeon_dev->pci_dev->dev,
1996 "iq/oq config failed status: %x\n", retval);
1997 /* Soft instr is freed by driver in case of failure. */
1998 goto setup_nic_dev_fail;
1999 }
2000
2001 /* Sleep on a wait queue till the cond flag indicates that the
2002 * response arrived or timed-out.
2003 */
2004 if (sleep_cond(&ctx->wc, &ctx->cond) == -EINTR) {
2005 dev_err(&octeon_dev->pci_dev->dev, "Wait interrupted\n");
2006 goto setup_nic_wait_intr;
2007 }
2008
2009 retval = resp->status;
2010 if (retval) {
2011 dev_err(&octeon_dev->pci_dev->dev, "iq/oq config failed\n");
2012 goto setup_nic_dev_fail;
2013 }
2014
2015 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2016 (sizeof(struct liquidio_if_cfg_info)) >> 3);
2017
2018 num_iqueues = hweight64(resp->cfg_info.iqmask);
2019 num_oqueues = hweight64(resp->cfg_info.oqmask);
2020
2021 if (!(num_iqueues) || !(num_oqueues)) {
2022 dev_err(&octeon_dev->pci_dev->dev,
2023 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2024 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2025 goto setup_nic_dev_fail;
2026 }
2027 dev_dbg(&octeon_dev->pci_dev->dev,
2028 "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2029 i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2030 num_iqueues, num_oqueues);
2031
2032 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2033
2034 if (!netdev) {
2035 dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2036 goto setup_nic_dev_fail;
2037 }
2038
2039 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2040
2041 /* Associate the routines that will handle different
2042 * netdev tasks.
2043 */
2044 netdev->netdev_ops = &lionetdevops;
2045
2046 lio = GET_LIO(netdev);
2047
2048 memset(lio, 0, sizeof(struct lio));
2049
2050 lio->ifidx = ifidx_or_pfnum;
2051
2052 props = &octeon_dev->props[i];
2053 props->gmxport = resp->cfg_info.linfo.gmxport;
2054 props->netdev = netdev;
2055
2056 lio->linfo.num_rxpciq = num_oqueues;
2057 lio->linfo.num_txpciq = num_iqueues;
2058
2059 for (j = 0; j < num_oqueues; j++) {
2060 lio->linfo.rxpciq[j].u64 =
2061 resp->cfg_info.linfo.rxpciq[j].u64;
2062 }
2063 for (j = 0; j < num_iqueues; j++) {
2064 lio->linfo.txpciq[j].u64 =
2065 resp->cfg_info.linfo.txpciq[j].u64;
2066 }
2067
2068 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2069 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2070 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2071 lio->linfo.macaddr_is_admin_asgnd =
2072 resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2073
2074 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2075
2076 lio->dev_capability = NETIF_F_HIGHDMA
2077 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2078 | NETIF_F_SG | NETIF_F_RXCSUM
2079 | NETIF_F_TSO | NETIF_F_TSO6
2080 | NETIF_F_GRO
2081 | NETIF_F_LRO;
2082 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2083
2084 /* Copy of transmit encapsulation capabilities:
2085 * TSO, TSO6, Checksums for this device
2086 */
2087 lio->enc_dev_capability = NETIF_F_IP_CSUM
2088 | NETIF_F_IPV6_CSUM
2089 | NETIF_F_GSO_UDP_TUNNEL
2090 | NETIF_F_HW_CSUM | NETIF_F_SG
2091 | NETIF_F_RXCSUM
2092 | NETIF_F_TSO | NETIF_F_TSO6
2093 | NETIF_F_LRO;
2094
2095 netdev->hw_enc_features =
2096 (lio->enc_dev_capability & ~NETIF_F_LRO);
2097 netdev->vlan_features = lio->dev_capability;
2098 /* Add any unchangeable hw features */
2099 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2100 NETIF_F_HW_VLAN_CTAG_RX |
2101 NETIF_F_HW_VLAN_CTAG_TX;
2102
2103 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2104
2105 netdev->hw_features = lio->dev_capability;
2106 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2107
2108 /* MTU range: 68 - 16000 */
2109 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2110 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2111
2112 /* Point to the properties for octeon device to which this
2113 * interface belongs.
2114 */
2115 lio->oct_dev = octeon_dev;
2116 lio->octprops = props;
2117 lio->netdev = netdev;
2118
2119 dev_dbg(&octeon_dev->pci_dev->dev,
2120 "if%d gmx: %d hw_addr: 0x%llx\n", i,
2121 lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2122
2123 /* 64-bit swap required on LE machines */
2124 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2125 for (j = 0; j < ETH_ALEN; j++)
2126 mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2127
2128 /* Copy MAC Address to OS network device structure */
2129 ether_addr_copy(netdev->dev_addr, mac);
2130
2131 if (liquidio_setup_io_queues(octeon_dev, i,
2132 lio->linfo.num_txpciq,
2133 lio->linfo.num_rxpciq)) {
2134 dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2135 goto setup_nic_dev_fail;
2136 }
2137
2138 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2139
2140 /* For VFs, enable Octeon device interrupts here,
2141 * as this is contingent upon IO queue setup
2142 */
2143 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2144 OCTEON_ALL_INTR);
2145
2146 /* By default all interfaces on a single Octeon uses the same
2147 * tx and rx queues
2148 */
2149 lio->txq = lio->linfo.txpciq[0].s.q_no;
2150 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2151
2152 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2153 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2154
2155 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2156 dev_err(&octeon_dev->pci_dev->dev,
2157 "Gather list allocation failed\n");
2158 goto setup_nic_dev_fail;
2159 }
2160
2161 /* Register ethtool support */
2162 liquidio_set_ethtool_ops(netdev);
2163 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2164 octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2165 else
2166 octeon_dev->priv_flags = 0x0;
2167
2168 if (netdev->features & NETIF_F_LRO)
2169 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2170 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2171
2172 if (setup_link_status_change_wq(netdev))
2173 goto setup_nic_dev_fail;
2174
2175 if (setup_rx_oom_poll_fn(netdev))
2176 goto setup_nic_dev_fail;
2177
2178 /* Register the network device with the OS */
2179 if (register_netdev(netdev)) {
2180 dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2181 goto setup_nic_dev_fail;
2182 }
2183
2184 dev_dbg(&octeon_dev->pci_dev->dev,
2185 "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2186 i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2187 netif_carrier_off(netdev);
2188 lio->link_changes++;
2189
2190 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2191
2192 /* Sending command to firmware to enable Rx checksum offload
2193 * by default at the time of setup of Liquidio driver for
2194 * this device
2195 */
2196 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2197 OCTNET_CMD_RXCSUM_ENABLE);
2198 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2199 OCTNET_CMD_TXCSUM_ENABLE);
2200
2201 dev_dbg(&octeon_dev->pci_dev->dev,
2202 "NIC ifidx:%d Setup successful\n", i);
2203
2204 octeon_free_soft_command(octeon_dev, sc);
2205
2206 octeon_dev->no_speed_setting = 1;
2207 }
2208
2209 return 0;
2210
2211 setup_nic_dev_fail:
2212
2213 octeon_free_soft_command(octeon_dev, sc);
2214
2215 setup_nic_wait_intr:
2216
2217 while (i--) {
2218 dev_err(&octeon_dev->pci_dev->dev,
2219 "NIC ifidx:%d Setup failed\n", i);
2220 liquidio_destroy_nic_device(octeon_dev, i);
2221 }
2222 return -ENODEV;
2223 }
2224
2225 /**
2226 * \brief initialize the NIC
2227 * @param oct octeon device
2228 *
2229 * This initialization routine is called once the Octeon device application is
2230 * up and running
2231 */
liquidio_init_nic_module(struct octeon_device * oct)2232 static int liquidio_init_nic_module(struct octeon_device *oct)
2233 {
2234 int num_nic_ports = 1;
2235 int i, retval = 0;
2236
2237 dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2238
2239 /* only default iq and oq were initialized
2240 * initialize the rest as well run port_config command for each port
2241 */
2242 oct->ifcount = num_nic_ports;
2243 memset(oct->props, 0,
2244 sizeof(struct octdev_props) * num_nic_ports);
2245
2246 for (i = 0; i < MAX_OCTEON_LINKS; i++)
2247 oct->props[i].gmxport = -1;
2248
2249 retval = setup_nic_devices(oct);
2250 if (retval) {
2251 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2252 goto octnet_init_failure;
2253 }
2254
2255 dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2256
2257 return retval;
2258
2259 octnet_init_failure:
2260
2261 oct->ifcount = 0;
2262
2263 return retval;
2264 }
2265
2266 /**
2267 * \brief Device initialization for each Octeon device that is probed
2268 * @param octeon_dev octeon device
2269 */
octeon_device_init(struct octeon_device * oct)2270 static int octeon_device_init(struct octeon_device *oct)
2271 {
2272 u32 rev_id;
2273 int j;
2274
2275 atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2276
2277 /* Enable access to the octeon device and make its DMA capability
2278 * known to the OS.
2279 */
2280 if (octeon_pci_os_setup(oct))
2281 return 1;
2282 atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2283
2284 oct->chip_id = OCTEON_CN23XX_VF_VID;
2285 pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2286 oct->rev_id = rev_id & 0xff;
2287
2288 if (cn23xx_setup_octeon_vf_device(oct))
2289 return 1;
2290
2291 atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2292
2293 oct->app_mode = CVM_DRV_NIC_APP;
2294
2295 /* Initialize the dispatch mechanism used to push packets arriving on
2296 * Octeon Output queues.
2297 */
2298 if (octeon_init_dispatch_list(oct))
2299 return 1;
2300
2301 atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2302
2303 if (octeon_set_io_queues_off(oct)) {
2304 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2305 return 1;
2306 }
2307
2308 if (oct->fn_list.setup_device_regs(oct)) {
2309 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2310 return 1;
2311 }
2312
2313 /* Initialize soft command buffer pool */
2314 if (octeon_setup_sc_buffer_pool(oct)) {
2315 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2316 return 1;
2317 }
2318 atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2319
2320 /* Setup the data structures that manage this Octeon's Input queues. */
2321 if (octeon_setup_instr_queues(oct)) {
2322 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2323 return 1;
2324 }
2325 atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2326
2327 /* Initialize lists to manage the requests of different types that
2328 * arrive from user & kernel applications for this octeon device.
2329 */
2330 if (octeon_setup_response_list(oct)) {
2331 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2332 return 1;
2333 }
2334 atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2335
2336 if (octeon_setup_output_queues(oct)) {
2337 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2338 return 1;
2339 }
2340 atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2341
2342 if (oct->fn_list.setup_mbox(oct)) {
2343 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2344 return 1;
2345 }
2346 atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2347
2348 if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2349 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2350 return 1;
2351 }
2352 atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2353
2354 dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF Version: %s, %d ioqs\n",
2355 LIQUIDIO_VERSION, oct->sriov_info.rings_per_vf);
2356
2357 /* Setup the interrupt handler and record the INT SUM register address*/
2358 if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2359 return 1;
2360
2361 atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2362
2363 /* ***************************************************************
2364 * The interrupts need to be enabled for the PF<-->VF handshake.
2365 * They are [re]-enabled after the PF<-->VF handshake so that the
2366 * correct OQ tick value is used (i.e. the value retrieved from
2367 * the PF as part of the handshake).
2368 */
2369
2370 /* Enable Octeon device interrupts */
2371 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2372
2373 if (cn23xx_octeon_pfvf_handshake(oct))
2374 return 1;
2375
2376 /* Here we [re]-enable the interrupts so that the correct OQ tick value
2377 * is used (i.e. the value that was retrieved during the handshake)
2378 */
2379
2380 /* Enable Octeon device interrupts */
2381 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2382 /* *************************************************************** */
2383
2384 /* Enable the input and output queues for this Octeon device */
2385 if (oct->fn_list.enable_io_queues(oct)) {
2386 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2387 return 1;
2388 }
2389
2390 atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2391
2392 atomic_set(&oct->status, OCT_DEV_HOST_OK);
2393
2394 /* Send Credit for Octeon Output queues. Credits are always sent after
2395 * the output queue is enabled.
2396 */
2397 for (j = 0; j < oct->num_oqs; j++)
2398 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2399
2400 /* Packets can start arriving on the output queues from this point. */
2401
2402 atomic_set(&oct->status, OCT_DEV_CORE_OK);
2403
2404 atomic_set(&oct->status, OCT_DEV_RUNNING);
2405
2406 if (liquidio_init_nic_module(oct))
2407 return 1;
2408
2409 return 0;
2410 }
2411
liquidio_vf_init(void)2412 static int __init liquidio_vf_init(void)
2413 {
2414 octeon_init_device_list(0);
2415 return pci_register_driver(&liquidio_vf_pci_driver);
2416 }
2417
liquidio_vf_exit(void)2418 static void __exit liquidio_vf_exit(void)
2419 {
2420 pci_unregister_driver(&liquidio_vf_pci_driver);
2421
2422 pr_info("LiquidIO_VF network module is now unloaded\n");
2423 }
2424
2425 module_init(liquidio_vf_init);
2426 module_exit(liquidio_vf_exit);
2427