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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / cavium / liquidio / lio_vf_main.c
blob7a77544a54f5b2564864840ed4a9b5f5deeae966
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 oct_timestamp_resp {
44 u64 rh;
45 u64 timestamp;
46 u64 status;
47 };
48
49 union tx_info {
50 u64 u64;
51 struct {
52 #ifdef __BIG_ENDIAN_BITFIELD
53 u16 gso_size;
54 u16 gso_segs;
55 u32 reserved;
56 #else
57 u32 reserved;
58 u16 gso_segs;
59 u16 gso_size;
60 #endif
61 } s;
62 };
63
64 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
65 #define OCTNIC_GSO_MAX_SIZE \
66 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
67
68 static int
69 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
70 static void liquidio_vf_remove(struct pci_dev *pdev);
71 static int octeon_device_init(struct octeon_device *oct);
72 static int liquidio_stop(struct net_device *netdev);
73
74 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
75 {
76 struct octeon_device_priv *oct_priv =
77 (struct octeon_device_priv *)oct->priv;
78 int retry = MAX_IO_PENDING_PKT_COUNT;
79 int pkt_cnt = 0, pending_pkts;
80 int i;
81
82 do {
83 pending_pkts = 0;
84
85 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
86 if (!(oct->io_qmask.oq & BIT_ULL(i)))
87 continue;
88 pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
89 }
90 if (pkt_cnt > 0) {
91 pending_pkts += pkt_cnt;
92 tasklet_schedule(&oct_priv->droq_tasklet);
93 }
94 pkt_cnt = 0;
95 schedule_timeout_uninterruptible(1);
96
97 } while (retry-- && pending_pkts);
98
99 return pkt_cnt;
100 }
101
102 /**
103 * \brief Cause device to go quiet so it can be safely removed/reset/etc
104 * @param oct Pointer to Octeon device
105 */
106 static void pcierror_quiesce_device(struct octeon_device *oct)
107 {
108 int i;
109
110 /* Disable the input and output queues now. No more packets will
111 * arrive from Octeon, but we should wait for all packet processing
112 * to finish.
113 */
114
115 /* To allow for in-flight requests */
116 schedule_timeout_uninterruptible(100);
117
118 if (wait_for_pending_requests(oct))
119 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
120
121 /* Force all requests waiting to be fetched by OCTEON to complete. */
122 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
123 struct octeon_instr_queue *iq;
124
125 if (!(oct->io_qmask.iq & BIT_ULL(i)))
126 continue;
127 iq = oct->instr_queue[i];
128
129 if (atomic_read(&iq->instr_pending)) {
130 spin_lock_bh(&iq->lock);
131 iq->fill_cnt = 0;
132 iq->octeon_read_index = iq->host_write_index;
133 iq->stats.instr_processed +=
134 atomic_read(&iq->instr_pending);
135 lio_process_iq_request_list(oct, iq, 0);
136 spin_unlock_bh(&iq->lock);
137 }
138 }
139
140 /* Force all pending ordered list requests to time out. */
141 lio_process_ordered_list(oct, 1);
142
143 /* We do not need to wait for output queue packets to be processed. */
144 }
145
146 /**
147 * \brief Cleanup PCI AER uncorrectable error status
148 * @param dev Pointer to PCI device
149 */
150 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
151 {
152 u32 status, mask;
153 int pos = 0x100;
154
155 pr_info("%s :\n", __func__);
156
157 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
158 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
159 if (dev->error_state == pci_channel_io_normal)
160 status &= ~mask; /* Clear corresponding nonfatal bits */
161 else
162 status &= mask; /* Clear corresponding fatal bits */
163 pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
164 }
165
166 /**
167 * \brief Stop all PCI IO to a given device
168 * @param dev Pointer to Octeon device
169 */
170 static void stop_pci_io(struct octeon_device *oct)
171 {
172 struct msix_entry *msix_entries;
173 int i;
174
175 /* No more instructions will be forwarded. */
176 atomic_set(&oct->status, OCT_DEV_IN_RESET);
177
178 for (i = 0; i < oct->ifcount; i++)
179 netif_device_detach(oct->props[i].netdev);
180
181 /* Disable interrupts */
182 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
183
184 pcierror_quiesce_device(oct);
185 if (oct->msix_on) {
186 msix_entries = (struct msix_entry *)oct->msix_entries;
187 for (i = 0; i < oct->num_msix_irqs; i++) {
188 /* clear the affinity_cpumask */
189 irq_set_affinity_hint(msix_entries[i].vector,
190 NULL);
191 free_irq(msix_entries[i].vector,
192 &oct->ioq_vector[i]);
193 }
194 pci_disable_msix(oct->pci_dev);
195 kfree(oct->msix_entries);
196 oct->msix_entries = NULL;
197 octeon_free_ioq_vector(oct);
198 }
199 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
200 lio_get_state_string(&oct->status));
201
202 /* making it a common function for all OCTEON models */
203 cleanup_aer_uncorrect_error_status(oct->pci_dev);
204
205 pci_disable_device(oct->pci_dev);
206 }
207
208 /**
209 * \brief called when PCI error is detected
210 * @param pdev Pointer to PCI device
211 * @param state The current pci connection state
212 *
213 * This function is called after a PCI bus error affecting
214 * this device has been detected.
215 */
216 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
217 pci_channel_state_t state)
218 {
219 struct octeon_device *oct = pci_get_drvdata(pdev);
220
221 /* Non-correctable Non-fatal errors */
222 if (state == pci_channel_io_normal) {
223 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
224 cleanup_aer_uncorrect_error_status(oct->pci_dev);
225 return PCI_ERS_RESULT_CAN_RECOVER;
226 }
227
228 /* Non-correctable Fatal errors */
229 dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
230 stop_pci_io(oct);
231
232 return PCI_ERS_RESULT_DISCONNECT;
233 }
234
235 /* For PCI-E Advanced Error Recovery (AER) Interface */
236 static const struct pci_error_handlers liquidio_vf_err_handler = {
237 .error_detected = liquidio_pcie_error_detected,
238 };
239
240 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
241 {
242 PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
243 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
244 },
245 {
246 0, 0, 0, 0, 0, 0, 0
247 }
248 };
249 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
250
251 static struct pci_driver liquidio_vf_pci_driver = {
252 .name = "LiquidIO_VF",
253 .id_table = liquidio_vf_pci_tbl,
254 .probe = liquidio_vf_probe,
255 .remove = liquidio_vf_remove,
256 .err_handler = &liquidio_vf_err_handler, /* For AER */
257 };
258
259 /**
260 * \brief Print link information
261 * @param netdev network device
262 */
263 static void print_link_info(struct net_device *netdev)
264 {
265 struct lio *lio = GET_LIO(netdev);
266
267 if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
268 ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
269 struct oct_link_info *linfo = &lio->linfo;
270
271 if (linfo->link.s.link_up) {
272 netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
273 linfo->link.s.speed,
274 (linfo->link.s.duplex) ? "Full" : "Half");
275 } else {
276 netif_info(lio, link, lio->netdev, "Link Down\n");
277 }
278 }
279 }
280
281 /**
282 * \brief Routine to notify MTU change
283 * @param work work_struct data structure
284 */
285 static void octnet_link_status_change(struct work_struct *work)
286 {
287 struct cavium_wk *wk = (struct cavium_wk *)work;
288 struct lio *lio = (struct lio *)wk->ctxptr;
289
290 /* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
291 * this API is invoked only when new max-MTU of the interface is
292 * less than current MTU.
293 */
294 rtnl_lock();
295 dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
296 rtnl_unlock();
297 }
298
299 /**
300 * \brief Sets up the mtu status change work
301 * @param netdev network device
302 */
303 static int setup_link_status_change_wq(struct net_device *netdev)
304 {
305 struct lio *lio = GET_LIO(netdev);
306 struct octeon_device *oct = lio->oct_dev;
307
308 lio->link_status_wq.wq = alloc_workqueue("link-status",
309 WQ_MEM_RECLAIM, 0);
310 if (!lio->link_status_wq.wq) {
311 dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
312 return -1;
313 }
314 INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
315 octnet_link_status_change);
316 lio->link_status_wq.wk.ctxptr = lio;
317
318 return 0;
319 }
320
321 static void cleanup_link_status_change_wq(struct net_device *netdev)
322 {
323 struct lio *lio = GET_LIO(netdev);
324
325 if (lio->link_status_wq.wq) {
326 cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
327 destroy_workqueue(lio->link_status_wq.wq);
328 }
329 }
330
331 /**
332 * \brief Update link status
333 * @param netdev network device
334 * @param ls link status structure
335 *
336 * Called on receipt of a link status response from the core application to
337 * update each interface's link status.
338 */
339 static void update_link_status(struct net_device *netdev,
340 union oct_link_status *ls)
341 {
342 struct lio *lio = GET_LIO(netdev);
343 int current_max_mtu = lio->linfo.link.s.mtu;
344 struct octeon_device *oct = lio->oct_dev;
345
346 if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
347 lio->linfo.link.u64 = ls->u64;
348
349 print_link_info(netdev);
350 lio->link_changes++;
351
352 if (lio->linfo.link.s.link_up) {
353 netif_carrier_on(netdev);
354 wake_txqs(netdev);
355 } else {
356 netif_carrier_off(netdev);
357 stop_txqs(netdev);
358 }
359
360 if (lio->linfo.link.s.mtu != current_max_mtu) {
361 dev_info(&oct->pci_dev->dev,
362 "Max MTU Changed from %d to %d\n",
363 current_max_mtu, lio->linfo.link.s.mtu);
364 netdev->max_mtu = lio->linfo.link.s.mtu;
365 }
366
367 if (lio->linfo.link.s.mtu < netdev->mtu) {
368 dev_warn(&oct->pci_dev->dev,
369 "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
370 netdev->mtu, lio->linfo.link.s.mtu);
371 queue_delayed_work(lio->link_status_wq.wq,
372 &lio->link_status_wq.wk.work, 0);
373 }
374 }
375 }
376
377 /**
378 * \brief PCI probe handler
379 * @param pdev PCI device structure
380 * @param ent unused
381 */
382 static int
383 liquidio_vf_probe(struct pci_dev *pdev,
384 const struct pci_device_id *ent __attribute__((unused)))
385 {
386 struct octeon_device *oct_dev = NULL;
387
388 oct_dev = octeon_allocate_device(pdev->device,
389 sizeof(struct octeon_device_priv));
390
391 if (!oct_dev) {
392 dev_err(&pdev->dev, "Unable to allocate device\n");
393 return -ENOMEM;
394 }
395 oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
396
397 dev_info(&pdev->dev, "Initializing device %x:%x.\n",
398 (u32)pdev->vendor, (u32)pdev->device);
399
400 /* Assign octeon_device for this device to the private data area. */
401 pci_set_drvdata(pdev, oct_dev);
402
403 /* set linux specific device pointer */
404 oct_dev->pci_dev = pdev;
405
406 oct_dev->subsystem_id = pdev->subsystem_vendor |
407 (pdev->subsystem_device << 16);
408
409 if (octeon_device_init(oct_dev)) {
410 liquidio_vf_remove(pdev);
411 return -ENOMEM;
412 }
413
414 dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
415
416 return 0;
417 }
418
419 /**
420 * \brief PCI FLR for each Octeon device.
421 * @param oct octeon device
422 */
423 static void octeon_pci_flr(struct octeon_device *oct)
424 {
425 pci_save_state(oct->pci_dev);
426
427 pci_cfg_access_lock(oct->pci_dev);
428
429 /* Quiesce the device completely */
430 pci_write_config_word(oct->pci_dev, PCI_COMMAND,
431 PCI_COMMAND_INTX_DISABLE);
432
433 pcie_flr(oct->pci_dev);
434
435 pci_cfg_access_unlock(oct->pci_dev);
436
437 pci_restore_state(oct->pci_dev);
438 }
439
440 /**
441 *\brief Destroy resources associated with octeon device
442 * @param pdev PCI device structure
443 * @param ent unused
444 */
445 static void octeon_destroy_resources(struct octeon_device *oct)
446 {
447 struct octeon_device_priv *oct_priv =
448 (struct octeon_device_priv *)oct->priv;
449 struct msix_entry *msix_entries;
450 int i;
451
452 switch (atomic_read(&oct->status)) {
453 case OCT_DEV_RUNNING:
454 case OCT_DEV_CORE_OK:
455 /* No more instructions will be forwarded. */
456 atomic_set(&oct->status, OCT_DEV_IN_RESET);
457
458 oct->app_mode = CVM_DRV_INVALID_APP;
459 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
460 lio_get_state_string(&oct->status));
461
462 schedule_timeout_uninterruptible(HZ / 10);
463
464 /* fallthrough */
465 case OCT_DEV_HOST_OK:
466 /* fallthrough */
467 case OCT_DEV_IO_QUEUES_DONE:
468 if (lio_wait_for_instr_fetch(oct))
469 dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
470
471 if (wait_for_pending_requests(oct))
472 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
473
474 /* Disable the input and output queues now. No more packets will
475 * arrive from Octeon, but we should wait for all packet
476 * processing to finish.
477 */
478 oct->fn_list.disable_io_queues(oct);
479
480 if (lio_wait_for_oq_pkts(oct))
481 dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
482
483 /* Force all requests waiting to be fetched by OCTEON to
484 * complete.
485 */
486 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
487 struct octeon_instr_queue *iq;
488
489 if (!(oct->io_qmask.iq & BIT_ULL(i)))
490 continue;
491 iq = oct->instr_queue[i];
492
493 if (atomic_read(&iq->instr_pending)) {
494 spin_lock_bh(&iq->lock);
495 iq->fill_cnt = 0;
496 iq->octeon_read_index = iq->host_write_index;
497 iq->stats.instr_processed +=
498 atomic_read(&iq->instr_pending);
499 lio_process_iq_request_list(oct, iq, 0);
500 spin_unlock_bh(&iq->lock);
501 }
502 }
503
504 lio_process_ordered_list(oct, 1);
505 octeon_free_sc_done_list(oct);
506 octeon_free_sc_zombie_list(oct);
507
508 /* fall through */
509 case OCT_DEV_INTR_SET_DONE:
510 /* Disable interrupts */
511 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
512
513 if (oct->msix_on) {
514 msix_entries = (struct msix_entry *)oct->msix_entries;
515 for (i = 0; i < oct->num_msix_irqs; i++) {
516 if (oct->ioq_vector[i].vector) {
517 irq_set_affinity_hint(
518 msix_entries[i].vector,
519 NULL);
520 free_irq(msix_entries[i].vector,
521 &oct->ioq_vector[i]);
522 oct->ioq_vector[i].vector = 0;
523 }
524 }
525 pci_disable_msix(oct->pci_dev);
526 kfree(oct->msix_entries);
527 oct->msix_entries = NULL;
528 kfree(oct->irq_name_storage);
529 oct->irq_name_storage = NULL;
530 }
531 /* Soft reset the octeon device before exiting */
532 if (oct->pci_dev->reset_fn)
533 octeon_pci_flr(oct);
534 else
535 cn23xx_vf_ask_pf_to_do_flr(oct);
536
537 /* fallthrough */
538 case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
539 octeon_free_ioq_vector(oct);
540
541 /* fallthrough */
542 case OCT_DEV_MBOX_SETUP_DONE:
543 oct->fn_list.free_mbox(oct);
544
545 /* fallthrough */
546 case OCT_DEV_IN_RESET:
547 case OCT_DEV_DROQ_INIT_DONE:
548 mdelay(100);
549 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
550 if (!(oct->io_qmask.oq & BIT_ULL(i)))
551 continue;
552 octeon_delete_droq(oct, i);
553 }
554
555 /* fallthrough */
556 case OCT_DEV_RESP_LIST_INIT_DONE:
557 octeon_delete_response_list(oct);
558
559 /* fallthrough */
560 case OCT_DEV_INSTR_QUEUE_INIT_DONE:
561 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
562 if (!(oct->io_qmask.iq & BIT_ULL(i)))
563 continue;
564 octeon_delete_instr_queue(oct, i);
565 }
566
567 /* fallthrough */
568 case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
569 octeon_free_sc_buffer_pool(oct);
570
571 /* fallthrough */
572 case OCT_DEV_DISPATCH_INIT_DONE:
573 octeon_delete_dispatch_list(oct);
574 cancel_delayed_work_sync(&oct->nic_poll_work.work);
575
576 /* fallthrough */
577 case OCT_DEV_PCI_MAP_DONE:
578 octeon_unmap_pci_barx(oct, 0);
579 octeon_unmap_pci_barx(oct, 1);
580
581 /* fallthrough */
582 case OCT_DEV_PCI_ENABLE_DONE:
583 pci_clear_master(oct->pci_dev);
584 /* Disable the device, releasing the PCI INT */
585 pci_disable_device(oct->pci_dev);
586
587 /* fallthrough */
588 case OCT_DEV_BEGIN_STATE:
589 /* Nothing to be done here either */
590 break;
591 }
592
593 tasklet_kill(&oct_priv->droq_tasklet);
594 }
595
596 /**
597 * \brief Send Rx control command
598 * @param lio per-network private data
599 * @param start_stop whether to start or stop
600 */
601 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
602 {
603 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
604 struct octeon_soft_command *sc;
605 union octnet_cmd *ncmd;
606 int retval;
607
608 if (oct->props[lio->ifidx].rx_on == start_stop)
609 return;
610
611 sc = (struct octeon_soft_command *)
612 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
613 16, 0);
614
615 ncmd = (union octnet_cmd *)sc->virtdptr;
616
617 ncmd->u64 = 0;
618 ncmd->s.cmd = OCTNET_CMD_RX_CTL;
619 ncmd->s.param1 = start_stop;
620
621 octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
622
623 sc->iq_no = lio->linfo.txpciq[0].s.q_no;
624
625 octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
626 OPCODE_NIC_CMD, 0, 0, 0);
627
628 init_completion(&sc->complete);
629 sc->sc_status = OCTEON_REQUEST_PENDING;
630
631 retval = octeon_send_soft_command(oct, sc);
632 if (retval == IQ_SEND_FAILED) {
633 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
634 octeon_free_soft_command(oct, sc);
635 } else {
636 /* Sleep on a wait queue till the cond flag indicates that the
637 * response arrived or timed-out.
638 */
639 retval = wait_for_sc_completion_timeout(oct, sc, 0);
640 if (retval)
641 return;
642
643 oct->props[lio->ifidx].rx_on = start_stop;
644 WRITE_ONCE(sc->caller_is_done, true);
645 }
646 }
647
648 /**
649 * \brief Destroy NIC device interface
650 * @param oct octeon device
651 * @param ifidx which interface to destroy
652 *
653 * Cleanup associated with each interface for an Octeon device when NIC
654 * module is being unloaded or if initialization fails during load.
655 */
656 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
657 {
658 struct net_device *netdev = oct->props[ifidx].netdev;
659 struct octeon_device_priv *oct_priv =
660 (struct octeon_device_priv *)oct->priv;
661 struct napi_struct *napi, *n;
662 struct lio *lio;
663
664 if (!netdev) {
665 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
666 __func__, ifidx);
667 return;
668 }
669
670 lio = GET_LIO(netdev);
671
672 dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
673
674 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
675 liquidio_stop(netdev);
676
677 if (oct->props[lio->ifidx].napi_enabled == 1) {
678 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
679 napi_disable(napi);
680
681 oct->props[lio->ifidx].napi_enabled = 0;
682
683 oct->droq[0]->ops.poll_mode = 0;
684 }
685
686 /* Delete NAPI */
687 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
688 netif_napi_del(napi);
689
690 tasklet_enable(&oct_priv->droq_tasklet);
691
692 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
693 unregister_netdev(netdev);
694
695 cleanup_rx_oom_poll_fn(netdev);
696
697 cleanup_link_status_change_wq(netdev);
698
699 lio_delete_glists(lio);
700
701 free_netdev(netdev);
702
703 oct->props[ifidx].gmxport = -1;
704
705 oct->props[ifidx].netdev = NULL;
706 }
707
708 /**
709 * \brief Stop complete NIC functionality
710 * @param oct octeon device
711 */
712 static int liquidio_stop_nic_module(struct octeon_device *oct)
713 {
714 struct lio *lio;
715 int i, j;
716
717 dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
718 if (!oct->ifcount) {
719 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
720 return 1;
721 }
722
723 spin_lock_bh(&oct->cmd_resp_wqlock);
724 oct->cmd_resp_state = OCT_DRV_OFFLINE;
725 spin_unlock_bh(&oct->cmd_resp_wqlock);
726
727 for (i = 0; i < oct->ifcount; i++) {
728 lio = GET_LIO(oct->props[i].netdev);
729 for (j = 0; j < oct->num_oqs; j++)
730 octeon_unregister_droq_ops(oct,
731 lio->linfo.rxpciq[j].s.q_no);
732 }
733
734 for (i = 0; i < oct->ifcount; i++)
735 liquidio_destroy_nic_device(oct, i);
736
737 dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
738 return 0;
739 }
740
741 /**
742 * \brief Cleans up resources at unload time
743 * @param pdev PCI device structure
744 */
745 static void liquidio_vf_remove(struct pci_dev *pdev)
746 {
747 struct octeon_device *oct_dev = pci_get_drvdata(pdev);
748
749 dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
750
751 if (oct_dev->app_mode == CVM_DRV_NIC_APP)
752 liquidio_stop_nic_module(oct_dev);
753
754 /* Reset the octeon device and cleanup all memory allocated for
755 * the octeon device by driver.
756 */
757 octeon_destroy_resources(oct_dev);
758
759 dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
760
761 /* This octeon device has been removed. Update the global
762 * data structure to reflect this. Free the device structure.
763 */
764 octeon_free_device_mem(oct_dev);
765 }
766
767 /**
768 * \brief PCI initialization for each Octeon device.
769 * @param oct octeon device
770 */
771 static int octeon_pci_os_setup(struct octeon_device *oct)
772 {
773 #ifdef CONFIG_PCI_IOV
774 /* setup PCI stuff first */
775 if (!oct->pci_dev->physfn)
776 octeon_pci_flr(oct);
777 #endif
778
779 if (pci_enable_device(oct->pci_dev)) {
780 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
781 return 1;
782 }
783
784 if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
785 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
786 pci_disable_device(oct->pci_dev);
787 return 1;
788 }
789
790 /* Enable PCI DMA Master. */
791 pci_set_master(oct->pci_dev);
792
793 return 0;
794 }
795
796 /**
797 * \brief Unmap and free network buffer
798 * @param buf buffer
799 */
800 static void free_netbuf(void *buf)
801 {
802 struct octnet_buf_free_info *finfo;
803 struct sk_buff *skb;
804 struct lio *lio;
805
806 finfo = (struct octnet_buf_free_info *)buf;
807 skb = finfo->skb;
808 lio = finfo->lio;
809
810 dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
811 DMA_TO_DEVICE);
812
813 tx_buffer_free(skb);
814 }
815
816 /**
817 * \brief Unmap and free gather buffer
818 * @param buf buffer
819 */
820 static void free_netsgbuf(void *buf)
821 {
822 struct octnet_buf_free_info *finfo;
823 struct octnic_gather *g;
824 struct sk_buff *skb;
825 int i, frags, iq;
826 struct lio *lio;
827
828 finfo = (struct octnet_buf_free_info *)buf;
829 skb = finfo->skb;
830 lio = finfo->lio;
831 g = finfo->g;
832 frags = skb_shinfo(skb)->nr_frags;
833
834 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
835 g->sg[0].ptr[0], (skb->len - skb->data_len),
836 DMA_TO_DEVICE);
837
838 i = 1;
839 while (frags--) {
840 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
841
842 pci_unmap_page((lio->oct_dev)->pci_dev,
843 g->sg[(i >> 2)].ptr[(i & 3)],
844 skb_frag_size(frag), DMA_TO_DEVICE);
845 i++;
846 }
847
848 iq = skb_iq(lio->oct_dev, skb);
849
850 spin_lock(&lio->glist_lock[iq]);
851 list_add_tail(&g->list, &lio->glist[iq]);
852 spin_unlock(&lio->glist_lock[iq]);
853
854 tx_buffer_free(skb);
855 }
856
857 /**
858 * \brief Unmap and free gather buffer with response
859 * @param buf buffer
860 */
861 static void free_netsgbuf_with_resp(void *buf)
862 {
863 struct octnet_buf_free_info *finfo;
864 struct octeon_soft_command *sc;
865 struct octnic_gather *g;
866 struct sk_buff *skb;
867 int i, frags, iq;
868 struct lio *lio;
869
870 sc = (struct octeon_soft_command *)buf;
871 skb = (struct sk_buff *)sc->callback_arg;
872 finfo = (struct octnet_buf_free_info *)&skb->cb;
873
874 lio = finfo->lio;
875 g = finfo->g;
876 frags = skb_shinfo(skb)->nr_frags;
877
878 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
879 g->sg[0].ptr[0], (skb->len - skb->data_len),
880 DMA_TO_DEVICE);
881
882 i = 1;
883 while (frags--) {
884 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
885
886 pci_unmap_page((lio->oct_dev)->pci_dev,
887 g->sg[(i >> 2)].ptr[(i & 3)],
888 skb_frag_size(frag), DMA_TO_DEVICE);
889 i++;
890 }
891
892 iq = skb_iq(lio->oct_dev, skb);
893
894 spin_lock(&lio->glist_lock[iq]);
895 list_add_tail(&g->list, &lio->glist[iq]);
896 spin_unlock(&lio->glist_lock[iq]);
897
898 /* Don't free the skb yet */
899 }
900
901 /**
902 * \brief Net device open for LiquidIO
903 * @param netdev network device
904 */
905 static int liquidio_open(struct net_device *netdev)
906 {
907 struct lio *lio = GET_LIO(netdev);
908 struct octeon_device *oct = lio->oct_dev;
909 struct octeon_device_priv *oct_priv =
910 (struct octeon_device_priv *)oct->priv;
911 struct napi_struct *napi, *n;
912
913 if (!oct->props[lio->ifidx].napi_enabled) {
914 tasklet_disable(&oct_priv->droq_tasklet);
915
916 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
917 napi_enable(napi);
918
919 oct->props[lio->ifidx].napi_enabled = 1;
920
921 oct->droq[0]->ops.poll_mode = 1;
922 }
923
924 ifstate_set(lio, LIO_IFSTATE_RUNNING);
925
926 /* Ready for link status updates */
927 lio->intf_open = 1;
928
929 netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
930 start_txqs(netdev);
931
932 INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
933 lio->stats_wk.ctxptr = lio;
934 schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
935 (LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
936
937 /* tell Octeon to start forwarding packets to host */
938 send_rx_ctrl_cmd(lio, 1);
939
940 dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
941
942 return 0;
943 }
944
945 /**
946 * \brief Net device stop for LiquidIO
947 * @param netdev network device
948 */
949 static int liquidio_stop(struct net_device *netdev)
950 {
951 struct lio *lio = GET_LIO(netdev);
952 struct octeon_device *oct = lio->oct_dev;
953 struct octeon_device_priv *oct_priv =
954 (struct octeon_device_priv *)oct->priv;
955 struct napi_struct *napi, *n;
956
957 /* tell Octeon to stop forwarding packets to host */
958 send_rx_ctrl_cmd(lio, 0);
959
960 netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
961 /* Inform that netif carrier is down */
962 lio->intf_open = 0;
963 lio->linfo.link.s.link_up = 0;
964
965 netif_carrier_off(netdev);
966 lio->link_changes++;
967
968 ifstate_reset(lio, LIO_IFSTATE_RUNNING);
969
970 stop_txqs(netdev);
971
972 /* Wait for any pending Rx descriptors */
973 if (lio_wait_for_clean_oq(oct))
974 netif_info(lio, rx_err, lio->netdev,
975 "Proceeding with stop interface after partial RX desc processing\n");
976
977 if (oct->props[lio->ifidx].napi_enabled == 1) {
978 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
979 napi_disable(napi);
980
981 oct->props[lio->ifidx].napi_enabled = 0;
982
983 oct->droq[0]->ops.poll_mode = 0;
984
985 tasklet_enable(&oct_priv->droq_tasklet);
986 }
987
988 cancel_delayed_work_sync(&lio->stats_wk.work);
989
990 dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
991
992 return 0;
993 }
994
995 /**
996 * \brief Converts a mask based on net device flags
997 * @param netdev network device
998 *
999 * This routine generates a octnet_ifflags mask from the net device flags
1000 * received from the OS.
1001 */
1002 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1003 {
1004 enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1005
1006 if (netdev->flags & IFF_PROMISC)
1007 f |= OCTNET_IFFLAG_PROMISC;
1008
1009 if (netdev->flags & IFF_ALLMULTI)
1010 f |= OCTNET_IFFLAG_ALLMULTI;
1011
1012 if (netdev->flags & IFF_MULTICAST) {
1013 f |= OCTNET_IFFLAG_MULTICAST;
1014
1015 /* Accept all multicast addresses if there are more than we
1016 * can handle
1017 */
1018 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1019 f |= OCTNET_IFFLAG_ALLMULTI;
1020 }
1021
1022 if (netdev->flags & IFF_BROADCAST)
1023 f |= OCTNET_IFFLAG_BROADCAST;
1024
1025 return f;
1026 }
1027
1028 static void liquidio_set_uc_list(struct net_device *netdev)
1029 {
1030 struct lio *lio = GET_LIO(netdev);
1031 struct octeon_device *oct = lio->oct_dev;
1032 struct octnic_ctrl_pkt nctrl;
1033 struct netdev_hw_addr *ha;
1034 u64 *mac;
1035
1036 if (lio->netdev_uc_count == netdev_uc_count(netdev))
1037 return;
1038
1039 if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1040 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1041 return;
1042 }
1043
1044 lio->netdev_uc_count = netdev_uc_count(netdev);
1045
1046 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1047 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1048 nctrl.ncmd.s.more = lio->netdev_uc_count;
1049 nctrl.ncmd.s.param1 = oct->vf_num;
1050 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1051 nctrl.netpndev = (u64)netdev;
1052 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1053
1054 /* copy all the addresses into the udd */
1055 mac = &nctrl.udd[0];
1056 netdev_for_each_uc_addr(ha, netdev) {
1057 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1058 mac++;
1059 }
1060
1061 octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1062 }
1063
1064 /**
1065 * \brief Net device set_multicast_list
1066 * @param netdev network device
1067 */
1068 static void liquidio_set_mcast_list(struct net_device *netdev)
1069 {
1070 int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1071 struct lio *lio = GET_LIO(netdev);
1072 struct octeon_device *oct = lio->oct_dev;
1073 struct octnic_ctrl_pkt nctrl;
1074 struct netdev_hw_addr *ha;
1075 u64 *mc;
1076 int ret;
1077
1078 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1079
1080 /* Create a ctrl pkt command to be sent to core app. */
1081 nctrl.ncmd.u64 = 0;
1082 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1083 nctrl.ncmd.s.param1 = get_new_flags(netdev);
1084 nctrl.ncmd.s.param2 = mc_count;
1085 nctrl.ncmd.s.more = mc_count;
1086 nctrl.netpndev = (u64)netdev;
1087 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1088
1089 /* copy all the addresses into the udd */
1090 mc = &nctrl.udd[0];
1091 netdev_for_each_mc_addr(ha, netdev) {
1092 *mc = 0;
1093 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1094 /* no need to swap bytes */
1095 if (++mc > &nctrl.udd[mc_count])
1096 break;
1097 }
1098
1099 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1100
1101 /* Apparently, any activity in this call from the kernel has to
1102 * be atomic. So we won't wait for response.
1103 */
1104
1105 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1106 if (ret) {
1107 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1108 ret);
1109 }
1110
1111 liquidio_set_uc_list(netdev);
1112 }
1113
1114 /**
1115 * \brief Net device set_mac_address
1116 * @param netdev network device
1117 */
1118 static int liquidio_set_mac(struct net_device *netdev, void *p)
1119 {
1120 struct sockaddr *addr = (struct sockaddr *)p;
1121 struct lio *lio = GET_LIO(netdev);
1122 struct octeon_device *oct = lio->oct_dev;
1123 struct octnic_ctrl_pkt nctrl;
1124 int ret = 0;
1125
1126 if (!is_valid_ether_addr(addr->sa_data))
1127 return -EADDRNOTAVAIL;
1128
1129 if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1130 return 0;
1131
1132 if (lio->linfo.macaddr_is_admin_asgnd)
1133 return -EPERM;
1134
1135 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1136
1137 nctrl.ncmd.u64 = 0;
1138 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1139 nctrl.ncmd.s.param1 = 0;
1140 nctrl.ncmd.s.more = 1;
1141 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1142 nctrl.netpndev = (u64)netdev;
1143
1144 nctrl.udd[0] = 0;
1145 /* The MAC Address is presented in network byte order. */
1146 ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1147
1148 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1149 if (ret < 0) {
1150 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1151 return -ENOMEM;
1152 }
1153
1154 if (nctrl.sc_status ==
1155 FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1156 dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1157 return -EPERM;
1158 }
1159
1160 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1161 ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1162
1163 return 0;
1164 }
1165
1166 static void
1167 liquidio_get_stats64(struct net_device *netdev,
1168 struct rtnl_link_stats64 *lstats)
1169 {
1170 struct lio *lio = GET_LIO(netdev);
1171 struct octeon_device *oct;
1172 u64 pkts = 0, drop = 0, bytes = 0;
1173 struct oct_droq_stats *oq_stats;
1174 struct oct_iq_stats *iq_stats;
1175 int i, iq_no, oq_no;
1176
1177 oct = lio->oct_dev;
1178
1179 if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1180 return;
1181
1182 for (i = 0; i < oct->num_iqs; i++) {
1183 iq_no = lio->linfo.txpciq[i].s.q_no;
1184 iq_stats = &oct->instr_queue[iq_no]->stats;
1185 pkts += iq_stats->tx_done;
1186 drop += iq_stats->tx_dropped;
1187 bytes += iq_stats->tx_tot_bytes;
1188 }
1189
1190 lstats->tx_packets = pkts;
1191 lstats->tx_bytes = bytes;
1192 lstats->tx_dropped = drop;
1193
1194 pkts = 0;
1195 drop = 0;
1196 bytes = 0;
1197
1198 for (i = 0; i < oct->num_oqs; i++) {
1199 oq_no = lio->linfo.rxpciq[i].s.q_no;
1200 oq_stats = &oct->droq[oq_no]->stats;
1201 pkts += oq_stats->rx_pkts_received;
1202 drop += (oq_stats->rx_dropped +
1203 oq_stats->dropped_nodispatch +
1204 oq_stats->dropped_toomany +
1205 oq_stats->dropped_nomem);
1206 bytes += oq_stats->rx_bytes_received;
1207 }
1208
1209 lstats->rx_bytes = bytes;
1210 lstats->rx_packets = pkts;
1211 lstats->rx_dropped = drop;
1212
1213 lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1214
1215 /* detailed rx_errors: */
1216 lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1217 /* recved pkt with crc error */
1218 lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1219 /* recv'd frame alignment error */
1220 lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1221
1222 lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1223 lstats->rx_frame_errors;
1224
1225 /* detailed tx_errors */
1226 lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1227 lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1228
1229 lstats->tx_errors = lstats->tx_aborted_errors +
1230 lstats->tx_carrier_errors;
1231 }
1232
1233 /**
1234 * \brief Handler for SIOCSHWTSTAMP ioctl
1235 * @param netdev network device
1236 * @param ifr interface request
1237 * @param cmd command
1238 */
1239 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1240 {
1241 struct lio *lio = GET_LIO(netdev);
1242 struct hwtstamp_config conf;
1243
1244 if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1245 return -EFAULT;
1246
1247 if (conf.flags)
1248 return -EINVAL;
1249
1250 switch (conf.tx_type) {
1251 case HWTSTAMP_TX_ON:
1252 case HWTSTAMP_TX_OFF:
1253 break;
1254 default:
1255 return -ERANGE;
1256 }
1257
1258 switch (conf.rx_filter) {
1259 case HWTSTAMP_FILTER_NONE:
1260 break;
1261 case HWTSTAMP_FILTER_ALL:
1262 case HWTSTAMP_FILTER_SOME:
1263 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1264 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1265 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1266 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1267 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1268 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1269 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1270 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1271 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1272 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1273 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1274 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1275 case HWTSTAMP_FILTER_NTP_ALL:
1276 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1277 break;
1278 default:
1279 return -ERANGE;
1280 }
1281
1282 if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1283 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1284
1285 else
1286 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1287
1288 return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1289 }
1290
1291 /**
1292 * \brief ioctl handler
1293 * @param netdev network device
1294 * @param ifr interface request
1295 * @param cmd command
1296 */
1297 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1298 {
1299 switch (cmd) {
1300 case SIOCSHWTSTAMP:
1301 return hwtstamp_ioctl(netdev, ifr);
1302 default:
1303 return -EOPNOTSUPP;
1304 }
1305 }
1306
1307 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1308 {
1309 struct sk_buff *skb = (struct sk_buff *)buf;
1310 struct octnet_buf_free_info *finfo;
1311 struct oct_timestamp_resp *resp;
1312 struct octeon_soft_command *sc;
1313 struct lio *lio;
1314
1315 finfo = (struct octnet_buf_free_info *)skb->cb;
1316 lio = finfo->lio;
1317 sc = finfo->sc;
1318 oct = lio->oct_dev;
1319 resp = (struct oct_timestamp_resp *)sc->virtrptr;
1320
1321 if (status != OCTEON_REQUEST_DONE) {
1322 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1323 CVM_CAST64(status));
1324 resp->timestamp = 0;
1325 }
1326
1327 octeon_swap_8B_data(&resp->timestamp, 1);
1328
1329 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1330 struct skb_shared_hwtstamps ts;
1331 u64 ns = resp->timestamp;
1332
1333 netif_info(lio, tx_done, lio->netdev,
1334 "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1335 skb, (unsigned long long)ns);
1336 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1337 skb_tstamp_tx(skb, &ts);
1338 }
1339
1340 octeon_free_soft_command(oct, sc);
1341 tx_buffer_free(skb);
1342 }
1343
1344 /* \brief Send a data packet that will be timestamped
1345 * @param oct octeon device
1346 * @param ndata pointer to network data
1347 * @param finfo pointer to private network data
1348 */
1349 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1350 struct octnic_data_pkt *ndata,
1351 struct octnet_buf_free_info *finfo,
1352 int xmit_more)
1353 {
1354 struct octeon_soft_command *sc;
1355 int ring_doorbell;
1356 struct lio *lio;
1357 int retval;
1358 u32 len;
1359
1360 lio = finfo->lio;
1361
1362 sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1363 sizeof(struct oct_timestamp_resp));
1364 finfo->sc = sc;
1365
1366 if (!sc) {
1367 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1368 return IQ_SEND_FAILED;
1369 }
1370
1371 if (ndata->reqtype == REQTYPE_NORESP_NET)
1372 ndata->reqtype = REQTYPE_RESP_NET;
1373 else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1374 ndata->reqtype = REQTYPE_RESP_NET_SG;
1375
1376 sc->callback = handle_timestamp;
1377 sc->callback_arg = finfo->skb;
1378 sc->iq_no = ndata->q_no;
1379
1380 len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1381
1382 ring_doorbell = !xmit_more;
1383
1384 retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1385 sc, len, ndata->reqtype);
1386
1387 if (retval == IQ_SEND_FAILED) {
1388 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1389 retval);
1390 octeon_free_soft_command(oct, sc);
1391 } else {
1392 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1393 }
1394
1395 return retval;
1396 }
1397
1398 /** \brief Transmit networks packets to the Octeon interface
1399 * @param skbuff skbuff struct to be passed to network layer.
1400 * @param netdev pointer to network device
1401 * @returns whether the packet was transmitted to the device okay or not
1402 * (NETDEV_TX_OK or NETDEV_TX_BUSY)
1403 */
1404 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1405 {
1406 struct octnet_buf_free_info *finfo;
1407 union octnic_cmd_setup cmdsetup;
1408 struct octnic_data_pkt ndata;
1409 struct octeon_instr_irh *irh;
1410 struct oct_iq_stats *stats;
1411 struct octeon_device *oct;
1412 int q_idx = 0, iq_no = 0;
1413 union tx_info *tx_info;
1414 int xmit_more = 0;
1415 struct lio *lio;
1416 int status = 0;
1417 u64 dptr = 0;
1418 u32 tag = 0;
1419 int j;
1420
1421 lio = GET_LIO(netdev);
1422 oct = lio->oct_dev;
1423
1424 q_idx = skb_iq(lio->oct_dev, skb);
1425 tag = q_idx;
1426 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1427
1428 stats = &oct->instr_queue[iq_no]->stats;
1429
1430 /* Check for all conditions in which the current packet cannot be
1431 * transmitted.
1432 */
1433 if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1434 (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1435 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1436 lio->linfo.link.s.link_up);
1437 goto lio_xmit_failed;
1438 }
1439
1440 /* Use space in skb->cb to store info used to unmap and
1441 * free the buffers.
1442 */
1443 finfo = (struct octnet_buf_free_info *)skb->cb;
1444 finfo->lio = lio;
1445 finfo->skb = skb;
1446 finfo->sc = NULL;
1447
1448 /* Prepare the attributes for the data to be passed to OSI. */
1449 memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1450
1451 ndata.buf = finfo;
1452
1453 ndata.q_no = iq_no;
1454
1455 if (octnet_iq_is_full(oct, ndata.q_no)) {
1456 /* defer sending if queue is full */
1457 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1458 ndata.q_no);
1459 stats->tx_iq_busy++;
1460 return NETDEV_TX_BUSY;
1461 }
1462
1463 ndata.datasize = skb->len;
1464
1465 cmdsetup.u64 = 0;
1466 cmdsetup.s.iq_no = iq_no;
1467
1468 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1469 if (skb->encapsulation) {
1470 cmdsetup.s.tnl_csum = 1;
1471 stats->tx_vxlan++;
1472 } else {
1473 cmdsetup.s.transport_csum = 1;
1474 }
1475 }
1476 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1477 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1478 cmdsetup.s.timestamp = 1;
1479 }
1480
1481 if (!skb_shinfo(skb)->nr_frags) {
1482 cmdsetup.s.u.datasize = skb->len;
1483 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1484 /* Offload checksum calculation for TCP/UDP packets */
1485 dptr = dma_map_single(&oct->pci_dev->dev,
1486 skb->data,
1487 skb->len,
1488 DMA_TO_DEVICE);
1489 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1490 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1491 __func__);
1492 return NETDEV_TX_BUSY;
1493 }
1494
1495 ndata.cmd.cmd3.dptr = dptr;
1496 finfo->dptr = dptr;
1497 ndata.reqtype = REQTYPE_NORESP_NET;
1498
1499 } else {
1500 skb_frag_t *frag;
1501 struct octnic_gather *g;
1502 int i, frags;
1503
1504 spin_lock(&lio->glist_lock[q_idx]);
1505 g = (struct octnic_gather *)
1506 lio_list_delete_head(&lio->glist[q_idx]);
1507 spin_unlock(&lio->glist_lock[q_idx]);
1508
1509 if (!g) {
1510 netif_info(lio, tx_err, lio->netdev,
1511 "Transmit scatter gather: glist null!\n");
1512 goto lio_xmit_failed;
1513 }
1514
1515 cmdsetup.s.gather = 1;
1516 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1517 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1518
1519 memset(g->sg, 0, g->sg_size);
1520
1521 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1522 skb->data,
1523 (skb->len - skb->data_len),
1524 DMA_TO_DEVICE);
1525 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1526 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1527 __func__);
1528 return NETDEV_TX_BUSY;
1529 }
1530 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1531
1532 frags = skb_shinfo(skb)->nr_frags;
1533 i = 1;
1534 while (frags--) {
1535 frag = &skb_shinfo(skb)->frags[i - 1];
1536
1537 g->sg[(i >> 2)].ptr[(i & 3)] =
1538 skb_frag_dma_map(&oct->pci_dev->dev,
1539 frag, 0, skb_frag_size(frag),
1540 DMA_TO_DEVICE);
1541 if (dma_mapping_error(&oct->pci_dev->dev,
1542 g->sg[i >> 2].ptr[i & 3])) {
1543 dma_unmap_single(&oct->pci_dev->dev,
1544 g->sg[0].ptr[0],
1545 skb->len - skb->data_len,
1546 DMA_TO_DEVICE);
1547 for (j = 1; j < i; j++) {
1548 frag = &skb_shinfo(skb)->frags[j - 1];
1549 dma_unmap_page(&oct->pci_dev->dev,
1550 g->sg[j >> 2].ptr[j & 3],
1551 skb_frag_size(frag),
1552 DMA_TO_DEVICE);
1553 }
1554 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1555 __func__);
1556 return NETDEV_TX_BUSY;
1557 }
1558
1559 add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1560 (i & 3));
1561 i++;
1562 }
1563
1564 dptr = g->sg_dma_ptr;
1565
1566 ndata.cmd.cmd3.dptr = dptr;
1567 finfo->dptr = dptr;
1568 finfo->g = g;
1569
1570 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1571 }
1572
1573 irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1574 tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1575
1576 if (skb_shinfo(skb)->gso_size) {
1577 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1578 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1579 }
1580
1581 /* HW insert VLAN tag */
1582 if (skb_vlan_tag_present(skb)) {
1583 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1584 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1585 }
1586
1587 xmit_more = netdev_xmit_more();
1588
1589 if (unlikely(cmdsetup.s.timestamp))
1590 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1591 else
1592 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1593 if (status == IQ_SEND_FAILED)
1594 goto lio_xmit_failed;
1595
1596 netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1597
1598 if (status == IQ_SEND_STOP) {
1599 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1600 iq_no);
1601 netif_stop_subqueue(netdev, q_idx);
1602 }
1603
1604 netif_trans_update(netdev);
1605
1606 if (tx_info->s.gso_segs)
1607 stats->tx_done += tx_info->s.gso_segs;
1608 else
1609 stats->tx_done++;
1610 stats->tx_tot_bytes += ndata.datasize;
1611
1612 return NETDEV_TX_OK;
1613
1614 lio_xmit_failed:
1615 stats->tx_dropped++;
1616 netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1617 iq_no, stats->tx_dropped);
1618 if (dptr)
1619 dma_unmap_single(&oct->pci_dev->dev, dptr,
1620 ndata.datasize, DMA_TO_DEVICE);
1621
1622 octeon_ring_doorbell_locked(oct, iq_no);
1623
1624 tx_buffer_free(skb);
1625 return NETDEV_TX_OK;
1626 }
1627
1628 /** \brief Network device Tx timeout
1629 * @param netdev pointer to network device
1630 */
1631 static void liquidio_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1632 {
1633 struct lio *lio;
1634
1635 lio = GET_LIO(netdev);
1636
1637 netif_info(lio, tx_err, lio->netdev,
1638 "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1639 netdev->stats.tx_dropped);
1640 netif_trans_update(netdev);
1641 wake_txqs(netdev);
1642 }
1643
1644 static int
1645 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1646 __be16 proto __attribute__((unused)), u16 vid)
1647 {
1648 struct lio *lio = GET_LIO(netdev);
1649 struct octeon_device *oct = lio->oct_dev;
1650 struct octnic_ctrl_pkt nctrl;
1651 int ret = 0;
1652
1653 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1654
1655 nctrl.ncmd.u64 = 0;
1656 nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1657 nctrl.ncmd.s.param1 = vid;
1658 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1659 nctrl.netpndev = (u64)netdev;
1660 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1661
1662 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1663 if (ret) {
1664 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1665 ret);
1666 return -EPERM;
1667 }
1668
1669 return 0;
1670 }
1671
1672 static int
1673 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1674 __be16 proto __attribute__((unused)), u16 vid)
1675 {
1676 struct lio *lio = GET_LIO(netdev);
1677 struct octeon_device *oct = lio->oct_dev;
1678 struct octnic_ctrl_pkt nctrl;
1679 int ret = 0;
1680
1681 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1682
1683 nctrl.ncmd.u64 = 0;
1684 nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1685 nctrl.ncmd.s.param1 = vid;
1686 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1687 nctrl.netpndev = (u64)netdev;
1688 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1689
1690 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1691 if (ret) {
1692 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1693 ret);
1694 if (ret > 0)
1695 ret = -EIO;
1696 }
1697 return ret;
1698 }
1699
1700 /** Sending command to enable/disable RX checksum offload
1701 * @param netdev pointer to network device
1702 * @param command OCTNET_CMD_TNL_RX_CSUM_CTL
1703 * @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
1704 * OCTNET_CMD_RXCSUM_DISABLE
1705 * @returns SUCCESS or FAILURE
1706 */
1707 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1708 u8 rx_cmd)
1709 {
1710 struct lio *lio = GET_LIO(netdev);
1711 struct octeon_device *oct = lio->oct_dev;
1712 struct octnic_ctrl_pkt nctrl;
1713 int ret = 0;
1714
1715 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1716
1717 nctrl.ncmd.u64 = 0;
1718 nctrl.ncmd.s.cmd = command;
1719 nctrl.ncmd.s.param1 = rx_cmd;
1720 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1721 nctrl.netpndev = (u64)netdev;
1722 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1723
1724 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1725 if (ret) {
1726 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1727 ret);
1728 if (ret > 0)
1729 ret = -EIO;
1730 }
1731 return ret;
1732 }
1733
1734 /** Sending command to add/delete VxLAN UDP port to firmware
1735 * @param netdev pointer to network device
1736 * @param command OCTNET_CMD_VXLAN_PORT_CONFIG
1737 * @param vxlan_port VxLAN port to be added or deleted
1738 * @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
1739 * OCTNET_CMD_VXLAN_PORT_DEL
1740 * @returns SUCCESS or FAILURE
1741 */
1742 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1743 u16 vxlan_port, u8 vxlan_cmd_bit)
1744 {
1745 struct lio *lio = GET_LIO(netdev);
1746 struct octeon_device *oct = lio->oct_dev;
1747 struct octnic_ctrl_pkt nctrl;
1748 int ret = 0;
1749
1750 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1751
1752 nctrl.ncmd.u64 = 0;
1753 nctrl.ncmd.s.cmd = command;
1754 nctrl.ncmd.s.more = vxlan_cmd_bit;
1755 nctrl.ncmd.s.param1 = vxlan_port;
1756 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1757 nctrl.netpndev = (u64)netdev;
1758 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1759
1760 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1761 if (ret) {
1762 dev_err(&oct->pci_dev->dev,
1763 "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1764 ret);
1765 if (ret > 0)
1766 ret = -EIO;
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 */
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 */
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
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
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
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 */
1924 static int setup_nic_devices(struct octeon_device *octeon_dev)
1925 {
1926 int retval, num_iqueues, num_oqueues;
1927 u32 resp_size, data_size;
1928 struct liquidio_if_cfg_resp *resp;
1929 struct octeon_soft_command *sc;
1930 union oct_nic_if_cfg if_cfg;
1931 struct octdev_props *props;
1932 struct net_device *netdev;
1933 struct lio_version *vdata;
1934 struct lio *lio = NULL;
1935 u8 mac[ETH_ALEN], i, j;
1936 u32 ifidx_or_pfnum;
1937
1938 ifidx_or_pfnum = octeon_dev->pf_num;
1939
1940 /* This is to handle link status changes */
1941 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1942 lio_nic_info, octeon_dev);
1943
1944 /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1945 * They are handled directly.
1946 */
1947 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1948 free_netbuf);
1949
1950 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1951 free_netsgbuf);
1952
1953 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1954 free_netsgbuf_with_resp);
1955
1956 for (i = 0; i < octeon_dev->ifcount; i++) {
1957 resp_size = sizeof(struct liquidio_if_cfg_resp);
1958 data_size = sizeof(struct lio_version);
1959 sc = (struct octeon_soft_command *)
1960 octeon_alloc_soft_command(octeon_dev, data_size,
1961 resp_size, 0);
1962 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1963 vdata = (struct lio_version *)sc->virtdptr;
1964
1965 *((u64 *)vdata) = 0;
1966 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1967 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1968 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1969
1970 if_cfg.u64 = 0;
1971
1972 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1973 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1974 if_cfg.s.base_queue = 0;
1975
1976 sc->iq_no = 0;
1977
1978 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1979 OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1980 0);
1981
1982 init_completion(&sc->complete);
1983 sc->sc_status = OCTEON_REQUEST_PENDING;
1984
1985 retval = octeon_send_soft_command(octeon_dev, sc);
1986 if (retval == IQ_SEND_FAILED) {
1987 dev_err(&octeon_dev->pci_dev->dev,
1988 "iq/oq config failed status: %x\n", retval);
1989 /* Soft instr is freed by driver in case of failure. */
1990 octeon_free_soft_command(octeon_dev, sc);
1991 return(-EIO);
1992 }
1993
1994 /* Sleep on a wait queue till the cond flag indicates that the
1995 * response arrived or timed-out.
1996 */
1997 retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
1998 if (retval)
1999 return retval;
2000
2001 retval = resp->status;
2002 if (retval) {
2003 dev_err(&octeon_dev->pci_dev->dev,
2004 "iq/oq config failed, retval = %d\n", retval);
2005 WRITE_ONCE(sc->caller_is_done, true);
2006 return -EIO;
2007 }
2008
2009 snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2010 32, "%s",
2011 resp->cfg_info.liquidio_firmware_version);
2012
2013 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2014 (sizeof(struct liquidio_if_cfg_info)) >> 3);
2015
2016 num_iqueues = hweight64(resp->cfg_info.iqmask);
2017 num_oqueues = hweight64(resp->cfg_info.oqmask);
2018
2019 if (!(num_iqueues) || !(num_oqueues)) {
2020 dev_err(&octeon_dev->pci_dev->dev,
2021 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2022 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2023 WRITE_ONCE(sc->caller_is_done, true);
2024 goto setup_nic_dev_done;
2025 }
2026 dev_dbg(&octeon_dev->pci_dev->dev,
2027 "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2028 i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2029 num_iqueues, num_oqueues);
2030
2031 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2032
2033 if (!netdev) {
2034 dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2035 WRITE_ONCE(sc->caller_is_done, true);
2036 goto setup_nic_dev_done;
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 lio->linfo.macaddr_spoofchk =
2074 resp->cfg_info.linfo.macaddr_spoofchk;
2075
2076 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2077
2078 lio->dev_capability = NETIF_F_HIGHDMA
2079 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2080 | NETIF_F_SG | NETIF_F_RXCSUM
2081 | NETIF_F_TSO | NETIF_F_TSO6
2082 | NETIF_F_GRO
2083 | NETIF_F_LRO;
2084 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2085
2086 /* Copy of transmit encapsulation capabilities:
2087 * TSO, TSO6, Checksums for this device
2088 */
2089 lio->enc_dev_capability = NETIF_F_IP_CSUM
2090 | NETIF_F_IPV6_CSUM
2091 | NETIF_F_GSO_UDP_TUNNEL
2092 | NETIF_F_HW_CSUM | NETIF_F_SG
2093 | NETIF_F_RXCSUM
2094 | NETIF_F_TSO | NETIF_F_TSO6
2095 | NETIF_F_LRO;
2096
2097 netdev->hw_enc_features =
2098 (lio->enc_dev_capability & ~NETIF_F_LRO);
2099 netdev->vlan_features = lio->dev_capability;
2100 /* Add any unchangeable hw features */
2101 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2102 NETIF_F_HW_VLAN_CTAG_RX |
2103 NETIF_F_HW_VLAN_CTAG_TX;
2104
2105 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2106
2107 netdev->hw_features = lio->dev_capability;
2108 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2109
2110 /* MTU range: 68 - 16000 */
2111 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2112 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2113
2114 WRITE_ONCE(sc->caller_is_done, true);
2115
2116 /* Point to the properties for octeon device to which this
2117 * interface belongs.
2118 */
2119 lio->oct_dev = octeon_dev;
2120 lio->octprops = props;
2121 lio->netdev = netdev;
2122
2123 dev_dbg(&octeon_dev->pci_dev->dev,
2124 "if%d gmx: %d hw_addr: 0x%llx\n", i,
2125 lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2126
2127 /* 64-bit swap required on LE machines */
2128 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2129 for (j = 0; j < ETH_ALEN; j++)
2130 mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2131
2132 /* Copy MAC Address to OS network device structure */
2133 ether_addr_copy(netdev->dev_addr, mac);
2134
2135 if (liquidio_setup_io_queues(octeon_dev, i,
2136 lio->linfo.num_txpciq,
2137 lio->linfo.num_rxpciq)) {
2138 dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2139 goto setup_nic_dev_free;
2140 }
2141
2142 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2143
2144 /* For VFs, enable Octeon device interrupts here,
2145 * as this is contingent upon IO queue setup
2146 */
2147 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2148 OCTEON_ALL_INTR);
2149
2150 /* By default all interfaces on a single Octeon uses the same
2151 * tx and rx queues
2152 */
2153 lio->txq = lio->linfo.txpciq[0].s.q_no;
2154 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2155
2156 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2157 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2158
2159 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2160 dev_err(&octeon_dev->pci_dev->dev,
2161 "Gather list allocation failed\n");
2162 goto setup_nic_dev_free;
2163 }
2164
2165 /* Register ethtool support */
2166 liquidio_set_ethtool_ops(netdev);
2167 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2168 octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2169 else
2170 octeon_dev->priv_flags = 0x0;
2171
2172 if (netdev->features & NETIF_F_LRO)
2173 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2174 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2175
2176 if (setup_link_status_change_wq(netdev))
2177 goto setup_nic_dev_free;
2178
2179 if (setup_rx_oom_poll_fn(netdev))
2180 goto setup_nic_dev_free;
2181
2182 /* Register the network device with the OS */
2183 if (register_netdev(netdev)) {
2184 dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2185 goto setup_nic_dev_free;
2186 }
2187
2188 dev_dbg(&octeon_dev->pci_dev->dev,
2189 "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2190 i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2191 netif_carrier_off(netdev);
2192 lio->link_changes++;
2193
2194 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2195
2196 /* Sending command to firmware to enable Rx checksum offload
2197 * by default at the time of setup of Liquidio driver for
2198 * this device
2199 */
2200 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2201 OCTNET_CMD_RXCSUM_ENABLE);
2202 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2203 OCTNET_CMD_TXCSUM_ENABLE);
2204
2205 dev_dbg(&octeon_dev->pci_dev->dev,
2206 "NIC ifidx:%d Setup successful\n", i);
2207
2208 octeon_dev->no_speed_setting = 1;
2209 }
2210
2211 return 0;
2212
2213 setup_nic_dev_free:
2214
2215 while (i--) {
2216 dev_err(&octeon_dev->pci_dev->dev,
2217 "NIC ifidx:%d Setup failed\n", i);
2218 liquidio_destroy_nic_device(octeon_dev, i);
2219 }
2220
2221 setup_nic_dev_done:
2222
2223 return -ENODEV;
2224 }
2225
2226 /**
2227 * \brief initialize the NIC
2228 * @param oct octeon device
2229 *
2230 * This initialization routine is called once the Octeon device application is
2231 * up and running
2232 */
2233 static int liquidio_init_nic_module(struct octeon_device *oct)
2234 {
2235 int num_nic_ports = 1;
2236 int i, retval = 0;
2237
2238 dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2239
2240 /* only default iq and oq were initialized
2241 * initialize the rest as well run port_config command for each port
2242 */
2243 oct->ifcount = num_nic_ports;
2244 memset(oct->props, 0,
2245 sizeof(struct octdev_props) * num_nic_ports);
2246
2247 for (i = 0; i < MAX_OCTEON_LINKS; i++)
2248 oct->props[i].gmxport = -1;
2249
2250 retval = setup_nic_devices(oct);
2251 if (retval) {
2252 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2253 goto octnet_init_failure;
2254 }
2255
2256 dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2257
2258 return retval;
2259
2260 octnet_init_failure:
2261
2262 oct->ifcount = 0;
2263
2264 return retval;
2265 }
2266
2267 /**
2268 * \brief Device initialization for each Octeon device that is probed
2269 * @param octeon_dev octeon device
2270 */
2271 static int octeon_device_init(struct octeon_device *oct)
2272 {
2273 u32 rev_id;
2274 int j;
2275
2276 atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2277
2278 /* Enable access to the octeon device and make its DMA capability
2279 * known to the OS.
2280 */
2281 if (octeon_pci_os_setup(oct))
2282 return 1;
2283 atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2284
2285 oct->chip_id = OCTEON_CN23XX_VF_VID;
2286 pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2287 oct->rev_id = rev_id & 0xff;
2288
2289 if (cn23xx_setup_octeon_vf_device(oct))
2290 return 1;
2291
2292 atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2293
2294 oct->app_mode = CVM_DRV_NIC_APP;
2295
2296 /* Initialize the dispatch mechanism used to push packets arriving on
2297 * Octeon Output queues.
2298 */
2299 if (octeon_init_dispatch_list(oct))
2300 return 1;
2301
2302 atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2303
2304 if (octeon_set_io_queues_off(oct)) {
2305 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2306 return 1;
2307 }
2308
2309 if (oct->fn_list.setup_device_regs(oct)) {
2310 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2311 return 1;
2312 }
2313
2314 /* Initialize soft command buffer pool */
2315 if (octeon_setup_sc_buffer_pool(oct)) {
2316 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2317 return 1;
2318 }
2319 atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2320
2321 /* Setup the data structures that manage this Octeon's Input queues. */
2322 if (octeon_setup_instr_queues(oct)) {
2323 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2324 return 1;
2325 }
2326 atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2327
2328 /* Initialize lists to manage the requests of different types that
2329 * arrive from user & kernel applications for this octeon device.
2330 */
2331 if (octeon_setup_response_list(oct)) {
2332 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2333 return 1;
2334 }
2335 atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2336
2337 if (octeon_setup_output_queues(oct)) {
2338 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2339 return 1;
2340 }
2341 atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2342
2343 if (oct->fn_list.setup_mbox(oct)) {
2344 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2345 return 1;
2346 }
2347 atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2348
2349 if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2350 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2351 return 1;
2352 }
2353 atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2354
2355 dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF Version: %s, %d ioqs\n",
2356 LIQUIDIO_VERSION, oct->sriov_info.rings_per_vf);
2357
2358 /* Setup the interrupt handler and record the INT SUM register address*/
2359 if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2360 return 1;
2361
2362 atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2363
2364 /* ***************************************************************
2365 * The interrupts need to be enabled for the PF<-->VF handshake.
2366 * They are [re]-enabled after the PF<-->VF handshake so that the
2367 * correct OQ tick value is used (i.e. the value retrieved from
2368 * the PF as part of the handshake).
2369 */
2370
2371 /* Enable Octeon device interrupts */
2372 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2373
2374 if (cn23xx_octeon_pfvf_handshake(oct))
2375 return 1;
2376
2377 /* Here we [re]-enable the interrupts so that the correct OQ tick value
2378 * is used (i.e. the value that was retrieved during the handshake)
2379 */
2380
2381 /* Enable Octeon device interrupts */
2382 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2383 /* *************************************************************** */
2384
2385 /* Enable the input and output queues for this Octeon device */
2386 if (oct->fn_list.enable_io_queues(oct)) {
2387 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2388 return 1;
2389 }
2390
2391 atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2392
2393 atomic_set(&oct->status, OCT_DEV_HOST_OK);
2394
2395 /* Send Credit for Octeon Output queues. Credits are always sent after
2396 * the output queue is enabled.
2397 */
2398 for (j = 0; j < oct->num_oqs; j++)
2399 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2400
2401 /* Packets can start arriving on the output queues from this point. */
2402
2403 atomic_set(&oct->status, OCT_DEV_CORE_OK);
2404
2405 atomic_set(&oct->status, OCT_DEV_RUNNING);
2406
2407 if (liquidio_init_nic_module(oct))
2408 return 1;
2409
2410 return 0;
2411 }
2412
2413 static int __init liquidio_vf_init(void)
2414 {
2415 octeon_init_device_list(0);
2416 return pci_register_driver(&liquidio_vf_pci_driver);
2417 }
2418
2419 static void __exit liquidio_vf_exit(void)
2420 {
2421 pci_unregister_driver(&liquidio_vf_pci_driver);
2422
2423 pr_info("LiquidIO_VF network module is now unloaded\n");
2424 }
2425
2426 module_init(liquidio_vf_init);
2427 module_exit(liquidio_vf_exit);
Linux with added FPC-III support