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
36 static int debug = -1;
37 module_param(debug, int, 0644);
38 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
39
40 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
41
42 struct oct_timestamp_resp {
43 u64 rh;
44 u64 timestamp;
45 u64 status;
46 };
47
48 union tx_info {
49 u64 u64;
50 struct {
51 #ifdef __BIG_ENDIAN_BITFIELD
52 u16 gso_size;
53 u16 gso_segs;
54 u32 reserved;
55 #else
56 u32 reserved;
57 u16 gso_segs;
58 u16 gso_size;
59 #endif
60 } s;
61 };
62
63 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
64 #define OCTNIC_GSO_MAX_SIZE \
65 (CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
66
67 static int
68 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
69 static void liquidio_vf_remove(struct pci_dev *pdev);
70 static int octeon_device_init(struct octeon_device *oct);
71 static int liquidio_stop(struct net_device *netdev);
72
lio_wait_for_oq_pkts(struct octeon_device * oct)73 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
74 {
75 struct octeon_device_priv *oct_priv =
76 (struct octeon_device_priv *)oct->priv;
77 int retry = MAX_IO_PENDING_PKT_COUNT;
78 int pkt_cnt = 0, pending_pkts;
79 int i;
80
81 do {
82 pending_pkts = 0;
83
84 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
85 if (!(oct->io_qmask.oq & BIT_ULL(i)))
86 continue;
87 pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
88 }
89 if (pkt_cnt > 0) {
90 pending_pkts += pkt_cnt;
91 tasklet_schedule(&oct_priv->droq_tasklet);
92 }
93 pkt_cnt = 0;
94 schedule_timeout_uninterruptible(1);
95
96 } while (retry-- && pending_pkts);
97
98 return pkt_cnt;
99 }
100
101 /**
102 * pcierror_quiesce_device - Cause device to go quiet so it can be safely removed/reset/etc
103 * @oct: Pointer to Octeon device
104 */
pcierror_quiesce_device(struct octeon_device * oct)105 static void pcierror_quiesce_device(struct octeon_device *oct)
106 {
107 int i;
108
109 /* Disable the input and output queues now. No more packets will
110 * arrive from Octeon, but we should wait for all packet processing
111 * to finish.
112 */
113
114 /* To allow for in-flight requests */
115 schedule_timeout_uninterruptible(100);
116
117 if (wait_for_pending_requests(oct))
118 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
119
120 /* Force all requests waiting to be fetched by OCTEON to complete. */
121 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
122 struct octeon_instr_queue *iq;
123
124 if (!(oct->io_qmask.iq & BIT_ULL(i)))
125 continue;
126 iq = oct->instr_queue[i];
127
128 if (atomic_read(&iq->instr_pending)) {
129 spin_lock_bh(&iq->lock);
130 iq->fill_cnt = 0;
131 iq->octeon_read_index = iq->host_write_index;
132 iq->stats.instr_processed +=
133 atomic_read(&iq->instr_pending);
134 lio_process_iq_request_list(oct, iq, 0);
135 spin_unlock_bh(&iq->lock);
136 }
137 }
138
139 /* Force all pending ordered list requests to time out. */
140 lio_process_ordered_list(oct, 1);
141
142 /* We do not need to wait for output queue packets to be processed. */
143 }
144
145 /**
146 * cleanup_aer_uncorrect_error_status - Cleanup PCI AER uncorrectable error status
147 * @dev: Pointer to PCI device
148 */
cleanup_aer_uncorrect_error_status(struct pci_dev * dev)149 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
150 {
151 u32 status, mask;
152 int pos = 0x100;
153
154 pr_info("%s :\n", __func__);
155
156 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
157 pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
158 if (dev->error_state == pci_channel_io_normal)
159 status &= ~mask; /* Clear corresponding nonfatal bits */
160 else
161 status &= mask; /* Clear corresponding fatal bits */
162 pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
163 }
164
165 /**
166 * stop_pci_io - Stop all PCI IO to a given device
167 * @oct: Pointer to Octeon device
168 */
stop_pci_io(struct octeon_device * oct)169 static void stop_pci_io(struct octeon_device *oct)
170 {
171 struct msix_entry *msix_entries;
172 int i;
173
174 /* No more instructions will be forwarded. */
175 atomic_set(&oct->status, OCT_DEV_IN_RESET);
176
177 for (i = 0; i < oct->ifcount; i++)
178 netif_device_detach(oct->props[i].netdev);
179
180 /* Disable interrupts */
181 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
182
183 pcierror_quiesce_device(oct);
184 if (oct->msix_on) {
185 msix_entries = (struct msix_entry *)oct->msix_entries;
186 for (i = 0; i < oct->num_msix_irqs; i++) {
187 /* clear the affinity_cpumask */
188 irq_set_affinity_hint(msix_entries[i].vector,
189 NULL);
190 free_irq(msix_entries[i].vector,
191 &oct->ioq_vector[i]);
192 }
193 pci_disable_msix(oct->pci_dev);
194 kfree(oct->msix_entries);
195 oct->msix_entries = NULL;
196 octeon_free_ioq_vector(oct);
197 }
198 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
199 lio_get_state_string(&oct->status));
200
201 /* making it a common function for all OCTEON models */
202 cleanup_aer_uncorrect_error_status(oct->pci_dev);
203
204 pci_disable_device(oct->pci_dev);
205 }
206
207 /**
208 * liquidio_pcie_error_detected - called when PCI error is detected
209 * @pdev: Pointer to PCI device
210 * @state: The current pci connection state
211 *
212 * This function is called after a PCI bus error affecting
213 * this device has been detected.
214 */
liquidio_pcie_error_detected(struct pci_dev * pdev,pci_channel_state_t state)215 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
216 pci_channel_state_t state)
217 {
218 struct octeon_device *oct = pci_get_drvdata(pdev);
219
220 /* Non-correctable Non-fatal errors */
221 if (state == pci_channel_io_normal) {
222 dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
223 cleanup_aer_uncorrect_error_status(oct->pci_dev);
224 return PCI_ERS_RESULT_CAN_RECOVER;
225 }
226
227 /* Non-correctable Fatal errors */
228 dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
229 stop_pci_io(oct);
230
231 return PCI_ERS_RESULT_DISCONNECT;
232 }
233
234 /* For PCI-E Advanced Error Recovery (AER) Interface */
235 static const struct pci_error_handlers liquidio_vf_err_handler = {
236 .error_detected = liquidio_pcie_error_detected,
237 };
238
239 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
240 {
241 PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
242 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
243 },
244 {
245 0, 0, 0, 0, 0, 0, 0
246 }
247 };
248 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
249
250 static struct pci_driver liquidio_vf_pci_driver = {
251 .name = "LiquidIO_VF",
252 .id_table = liquidio_vf_pci_tbl,
253 .probe = liquidio_vf_probe,
254 .remove = liquidio_vf_remove,
255 .err_handler = &liquidio_vf_err_handler, /* For AER */
256 };
257
258 /**
259 * print_link_info - Print link information
260 * @netdev: network device
261 */
print_link_info(struct net_device * netdev)262 static void print_link_info(struct net_device *netdev)
263 {
264 struct lio *lio = GET_LIO(netdev);
265
266 if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
267 ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
268 struct oct_link_info *linfo = &lio->linfo;
269
270 if (linfo->link.s.link_up) {
271 netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
272 linfo->link.s.speed,
273 (linfo->link.s.duplex) ? "Full" : "Half");
274 } else {
275 netif_info(lio, link, lio->netdev, "Link Down\n");
276 }
277 }
278 }
279
280 /**
281 * octnet_link_status_change - Routine to notify MTU change
282 * @work: work_struct data structure
283 */
octnet_link_status_change(struct work_struct * work)284 static void octnet_link_status_change(struct work_struct *work)
285 {
286 struct cavium_wk *wk = (struct cavium_wk *)work;
287 struct lio *lio = (struct lio *)wk->ctxptr;
288
289 /* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
290 * this API is invoked only when new max-MTU of the interface is
291 * less than current MTU.
292 */
293 rtnl_lock();
294 dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
295 rtnl_unlock();
296 }
297
298 /**
299 * setup_link_status_change_wq - Sets up the mtu status change work
300 * @netdev: network device
301 */
setup_link_status_change_wq(struct net_device * netdev)302 static int setup_link_status_change_wq(struct net_device *netdev)
303 {
304 struct lio *lio = GET_LIO(netdev);
305 struct octeon_device *oct = lio->oct_dev;
306
307 lio->link_status_wq.wq = alloc_workqueue("link-status",
308 WQ_MEM_RECLAIM, 0);
309 if (!lio->link_status_wq.wq) {
310 dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
311 return -1;
312 }
313 INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
314 octnet_link_status_change);
315 lio->link_status_wq.wk.ctxptr = lio;
316
317 return 0;
318 }
319
cleanup_link_status_change_wq(struct net_device * netdev)320 static void cleanup_link_status_change_wq(struct net_device *netdev)
321 {
322 struct lio *lio = GET_LIO(netdev);
323
324 if (lio->link_status_wq.wq) {
325 cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
326 destroy_workqueue(lio->link_status_wq.wq);
327 }
328 }
329
330 /**
331 * update_link_status - Update link status
332 * @netdev: network device
333 * @ls: link status structure
334 *
335 * Called on receipt of a link status response from the core application to
336 * update each interface's link status.
337 */
update_link_status(struct net_device * netdev,union oct_link_status * ls)338 static void update_link_status(struct net_device *netdev,
339 union oct_link_status *ls)
340 {
341 struct lio *lio = GET_LIO(netdev);
342 int current_max_mtu = lio->linfo.link.s.mtu;
343 struct octeon_device *oct = lio->oct_dev;
344
345 if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
346 lio->linfo.link.u64 = ls->u64;
347
348 print_link_info(netdev);
349 lio->link_changes++;
350
351 if (lio->linfo.link.s.link_up) {
352 netif_carrier_on(netdev);
353 wake_txqs(netdev);
354 } else {
355 netif_carrier_off(netdev);
356 stop_txqs(netdev);
357 }
358
359 if (lio->linfo.link.s.mtu != current_max_mtu) {
360 dev_info(&oct->pci_dev->dev,
361 "Max MTU Changed from %d to %d\n",
362 current_max_mtu, lio->linfo.link.s.mtu);
363 netdev->max_mtu = lio->linfo.link.s.mtu;
364 }
365
366 if (lio->linfo.link.s.mtu < netdev->mtu) {
367 dev_warn(&oct->pci_dev->dev,
368 "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
369 netdev->mtu, lio->linfo.link.s.mtu);
370 queue_delayed_work(lio->link_status_wq.wq,
371 &lio->link_status_wq.wk.work, 0);
372 }
373 }
374 }
375
376 /**
377 * liquidio_vf_probe - PCI probe handler
378 * @pdev: PCI device structure
379 * @ent: unused
380 */
381 static int
liquidio_vf_probe(struct pci_dev * pdev,const struct pci_device_id __maybe_unused * ent)382 liquidio_vf_probe(struct pci_dev *pdev,
383 const struct pci_device_id __maybe_unused *ent)
384 {
385 struct octeon_device *oct_dev = NULL;
386
387 oct_dev = octeon_allocate_device(pdev->device,
388 sizeof(struct octeon_device_priv));
389
390 if (!oct_dev) {
391 dev_err(&pdev->dev, "Unable to allocate device\n");
392 return -ENOMEM;
393 }
394 oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
395
396 dev_info(&pdev->dev, "Initializing device %x:%x.\n",
397 (u32)pdev->vendor, (u32)pdev->device);
398
399 /* Assign octeon_device for this device to the private data area. */
400 pci_set_drvdata(pdev, oct_dev);
401
402 /* set linux specific device pointer */
403 oct_dev->pci_dev = pdev;
404
405 oct_dev->subsystem_id = pdev->subsystem_vendor |
406 (pdev->subsystem_device << 16);
407
408 if (octeon_device_init(oct_dev)) {
409 liquidio_vf_remove(pdev);
410 return -ENOMEM;
411 }
412
413 dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
414
415 return 0;
416 }
417
418 /**
419 * octeon_pci_flr - PCI FLR for each Octeon device.
420 * @oct: octeon device
421 */
octeon_pci_flr(struct octeon_device * oct)422 static void octeon_pci_flr(struct octeon_device *oct)
423 {
424 pci_save_state(oct->pci_dev);
425
426 pci_cfg_access_lock(oct->pci_dev);
427
428 /* Quiesce the device completely */
429 pci_write_config_word(oct->pci_dev, PCI_COMMAND,
430 PCI_COMMAND_INTX_DISABLE);
431
432 pcie_flr(oct->pci_dev);
433
434 pci_cfg_access_unlock(oct->pci_dev);
435
436 pci_restore_state(oct->pci_dev);
437 }
438
439 /**
440 * octeon_destroy_resources - Destroy resources associated with octeon device
441 * @oct: octeon device
442 */
octeon_destroy_resources(struct octeon_device * oct)443 static void octeon_destroy_resources(struct octeon_device *oct)
444 {
445 struct octeon_device_priv *oct_priv =
446 (struct octeon_device_priv *)oct->priv;
447 struct msix_entry *msix_entries;
448 int i;
449
450 switch (atomic_read(&oct->status)) {
451 case OCT_DEV_RUNNING:
452 case OCT_DEV_CORE_OK:
453 /* No more instructions will be forwarded. */
454 atomic_set(&oct->status, OCT_DEV_IN_RESET);
455
456 oct->app_mode = CVM_DRV_INVALID_APP;
457 dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
458 lio_get_state_string(&oct->status));
459
460 schedule_timeout_uninterruptible(HZ / 10);
461
462 fallthrough;
463 case OCT_DEV_HOST_OK:
464 case OCT_DEV_IO_QUEUES_DONE:
465 if (lio_wait_for_instr_fetch(oct))
466 dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
467
468 if (wait_for_pending_requests(oct))
469 dev_err(&oct->pci_dev->dev, "There were pending requests\n");
470
471 /* Disable the input and output queues now. No more packets will
472 * arrive from Octeon, but we should wait for all packet
473 * processing to finish.
474 */
475 oct->fn_list.disable_io_queues(oct);
476
477 if (lio_wait_for_oq_pkts(oct))
478 dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
479
480 /* Force all requests waiting to be fetched by OCTEON to
481 * complete.
482 */
483 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
484 struct octeon_instr_queue *iq;
485
486 if (!(oct->io_qmask.iq & BIT_ULL(i)))
487 continue;
488 iq = oct->instr_queue[i];
489
490 if (atomic_read(&iq->instr_pending)) {
491 spin_lock_bh(&iq->lock);
492 iq->fill_cnt = 0;
493 iq->octeon_read_index = iq->host_write_index;
494 iq->stats.instr_processed +=
495 atomic_read(&iq->instr_pending);
496 lio_process_iq_request_list(oct, iq, 0);
497 spin_unlock_bh(&iq->lock);
498 }
499 }
500
501 lio_process_ordered_list(oct, 1);
502 octeon_free_sc_done_list(oct);
503 octeon_free_sc_zombie_list(oct);
504
505 fallthrough;
506 case OCT_DEV_INTR_SET_DONE:
507 /* Disable interrupts */
508 oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
509
510 if (oct->msix_on) {
511 msix_entries = (struct msix_entry *)oct->msix_entries;
512 for (i = 0; i < oct->num_msix_irqs; i++) {
513 if (oct->ioq_vector[i].vector) {
514 irq_set_affinity_hint(
515 msix_entries[i].vector,
516 NULL);
517 free_irq(msix_entries[i].vector,
518 &oct->ioq_vector[i]);
519 oct->ioq_vector[i].vector = 0;
520 }
521 }
522 pci_disable_msix(oct->pci_dev);
523 kfree(oct->msix_entries);
524 oct->msix_entries = NULL;
525 kfree(oct->irq_name_storage);
526 oct->irq_name_storage = NULL;
527 }
528 /* Soft reset the octeon device before exiting */
529 if (!pcie_reset_flr(oct->pci_dev, PCI_RESET_PROBE))
530 octeon_pci_flr(oct);
531 else
532 cn23xx_vf_ask_pf_to_do_flr(oct);
533
534 fallthrough;
535 case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
536 octeon_free_ioq_vector(oct);
537
538 fallthrough;
539 case OCT_DEV_MBOX_SETUP_DONE:
540 oct->fn_list.free_mbox(oct);
541
542 fallthrough;
543 case OCT_DEV_IN_RESET:
544 case OCT_DEV_DROQ_INIT_DONE:
545 mdelay(100);
546 for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
547 if (!(oct->io_qmask.oq & BIT_ULL(i)))
548 continue;
549 octeon_delete_droq(oct, i);
550 }
551
552 fallthrough;
553 case OCT_DEV_RESP_LIST_INIT_DONE:
554 octeon_delete_response_list(oct);
555
556 fallthrough;
557 case OCT_DEV_INSTR_QUEUE_INIT_DONE:
558 for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
559 if (!(oct->io_qmask.iq & BIT_ULL(i)))
560 continue;
561 octeon_delete_instr_queue(oct, i);
562 }
563
564 fallthrough;
565 case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
566 octeon_free_sc_buffer_pool(oct);
567
568 fallthrough;
569 case OCT_DEV_DISPATCH_INIT_DONE:
570 octeon_delete_dispatch_list(oct);
571 cancel_delayed_work_sync(&oct->nic_poll_work.work);
572
573 fallthrough;
574 case OCT_DEV_PCI_MAP_DONE:
575 octeon_unmap_pci_barx(oct, 0);
576 octeon_unmap_pci_barx(oct, 1);
577
578 fallthrough;
579 case OCT_DEV_PCI_ENABLE_DONE:
580 pci_clear_master(oct->pci_dev);
581 /* Disable the device, releasing the PCI INT */
582 pci_disable_device(oct->pci_dev);
583
584 fallthrough;
585 case OCT_DEV_BEGIN_STATE:
586 /* Nothing to be done here either */
587 break;
588 }
589
590 tasklet_kill(&oct_priv->droq_tasklet);
591 }
592
593 /**
594 * send_rx_ctrl_cmd - Send Rx control command
595 * @lio: per-network private data
596 * @start_stop: whether to start or stop
597 */
send_rx_ctrl_cmd(struct lio * lio,int start_stop)598 static int send_rx_ctrl_cmd(struct lio *lio, int start_stop)
599 {
600 struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
601 struct octeon_soft_command *sc;
602 union octnet_cmd *ncmd;
603 int retval;
604
605 if (oct->props[lio->ifidx].rx_on == start_stop)
606 return 0;
607
608 sc = (struct octeon_soft_command *)
609 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
610 16, 0);
611 if (!sc) {
612 netif_info(lio, rx_err, lio->netdev,
613 "Failed to allocate octeon_soft_command struct\n");
614 return -ENOMEM;
615 }
616
617 ncmd = (union octnet_cmd *)sc->virtdptr;
618
619 ncmd->u64 = 0;
620 ncmd->s.cmd = OCTNET_CMD_RX_CTL;
621 ncmd->s.param1 = start_stop;
622
623 octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
624
625 sc->iq_no = lio->linfo.txpciq[0].s.q_no;
626
627 octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
628 OPCODE_NIC_CMD, 0, 0, 0);
629
630 init_completion(&sc->complete);
631 sc->sc_status = OCTEON_REQUEST_PENDING;
632
633 retval = octeon_send_soft_command(oct, sc);
634 if (retval == IQ_SEND_FAILED) {
635 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
636 octeon_free_soft_command(oct, sc);
637 } else {
638 /* Sleep on a wait queue till the cond flag indicates that the
639 * response arrived or timed-out.
640 */
641 retval = wait_for_sc_completion_timeout(oct, sc, 0);
642 if (retval)
643 return retval;
644
645 oct->props[lio->ifidx].rx_on = start_stop;
646 WRITE_ONCE(sc->caller_is_done, true);
647 }
648
649 return retval;
650 }
651
652 /**
653 * liquidio_destroy_nic_device - Destroy NIC device interface
654 * @oct: octeon device
655 * @ifidx: which interface to destroy
656 *
657 * Cleanup associated with each interface for an Octeon device when NIC
658 * module is being unloaded or if initialization fails during load.
659 */
liquidio_destroy_nic_device(struct octeon_device * oct,int ifidx)660 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
661 {
662 struct net_device *netdev = oct->props[ifidx].netdev;
663 struct octeon_device_priv *oct_priv =
664 (struct octeon_device_priv *)oct->priv;
665 struct napi_struct *napi, *n;
666 struct lio *lio;
667
668 if (!netdev) {
669 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
670 __func__, ifidx);
671 return;
672 }
673
674 lio = GET_LIO(netdev);
675
676 dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
677
678 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
679 liquidio_stop(netdev);
680
681 if (oct->props[lio->ifidx].napi_enabled == 1) {
682 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
683 napi_disable(napi);
684
685 oct->props[lio->ifidx].napi_enabled = 0;
686
687 oct->droq[0]->ops.poll_mode = 0;
688 }
689
690 /* Delete NAPI */
691 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
692 netif_napi_del(napi);
693
694 tasklet_enable(&oct_priv->droq_tasklet);
695
696 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
697 unregister_netdev(netdev);
698
699 cleanup_rx_oom_poll_fn(netdev);
700
701 cleanup_link_status_change_wq(netdev);
702
703 lio_delete_glists(lio);
704
705 free_netdev(netdev);
706
707 oct->props[ifidx].gmxport = -1;
708
709 oct->props[ifidx].netdev = NULL;
710 }
711
712 /**
713 * liquidio_stop_nic_module - Stop complete NIC functionality
714 * @oct: octeon device
715 */
liquidio_stop_nic_module(struct octeon_device * oct)716 static int liquidio_stop_nic_module(struct octeon_device *oct)
717 {
718 struct lio *lio;
719 int i, j;
720
721 dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
722 if (!oct->ifcount) {
723 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
724 return 1;
725 }
726
727 spin_lock_bh(&oct->cmd_resp_wqlock);
728 oct->cmd_resp_state = OCT_DRV_OFFLINE;
729 spin_unlock_bh(&oct->cmd_resp_wqlock);
730
731 for (i = 0; i < oct->ifcount; i++) {
732 lio = GET_LIO(oct->props[i].netdev);
733 for (j = 0; j < oct->num_oqs; j++)
734 octeon_unregister_droq_ops(oct,
735 lio->linfo.rxpciq[j].s.q_no);
736 }
737
738 for (i = 0; i < oct->ifcount; i++)
739 liquidio_destroy_nic_device(oct, i);
740
741 dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
742 return 0;
743 }
744
745 /**
746 * liquidio_vf_remove - Cleans up resources at unload time
747 * @pdev: PCI device structure
748 */
liquidio_vf_remove(struct pci_dev * pdev)749 static void liquidio_vf_remove(struct pci_dev *pdev)
750 {
751 struct octeon_device *oct_dev = pci_get_drvdata(pdev);
752
753 dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
754
755 if (oct_dev->app_mode == CVM_DRV_NIC_APP)
756 liquidio_stop_nic_module(oct_dev);
757
758 /* Reset the octeon device and cleanup all memory allocated for
759 * the octeon device by driver.
760 */
761 octeon_destroy_resources(oct_dev);
762
763 dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
764
765 /* This octeon device has been removed. Update the global
766 * data structure to reflect this. Free the device structure.
767 */
768 octeon_free_device_mem(oct_dev);
769 }
770
771 /**
772 * octeon_pci_os_setup - PCI initialization for each Octeon device.
773 * @oct: octeon device
774 */
octeon_pci_os_setup(struct octeon_device * oct)775 static int octeon_pci_os_setup(struct octeon_device *oct)
776 {
777 #ifdef CONFIG_PCI_IOV
778 /* setup PCI stuff first */
779 if (!oct->pci_dev->physfn)
780 octeon_pci_flr(oct);
781 #endif
782
783 if (pci_enable_device(oct->pci_dev)) {
784 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
785 return 1;
786 }
787
788 if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
789 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
790 pci_disable_device(oct->pci_dev);
791 return 1;
792 }
793
794 /* Enable PCI DMA Master. */
795 pci_set_master(oct->pci_dev);
796
797 return 0;
798 }
799
800 /**
801 * free_netbuf - Unmap and free network buffer
802 * @buf: buffer
803 */
free_netbuf(void * buf)804 static void free_netbuf(void *buf)
805 {
806 struct octnet_buf_free_info *finfo;
807 struct sk_buff *skb;
808 struct lio *lio;
809
810 finfo = (struct octnet_buf_free_info *)buf;
811 skb = finfo->skb;
812 lio = finfo->lio;
813
814 dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
815 DMA_TO_DEVICE);
816
817 tx_buffer_free(skb);
818 }
819
820 /**
821 * free_netsgbuf - Unmap and free gather buffer
822 * @buf: buffer
823 */
free_netsgbuf(void * buf)824 static void free_netsgbuf(void *buf)
825 {
826 struct octnet_buf_free_info *finfo;
827 struct octnic_gather *g;
828 struct sk_buff *skb;
829 int i, frags, iq;
830 struct lio *lio;
831
832 finfo = (struct octnet_buf_free_info *)buf;
833 skb = finfo->skb;
834 lio = finfo->lio;
835 g = finfo->g;
836 frags = skb_shinfo(skb)->nr_frags;
837
838 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
839 g->sg[0].ptr[0], (skb->len - skb->data_len),
840 DMA_TO_DEVICE);
841
842 i = 1;
843 while (frags--) {
844 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
845
846 dma_unmap_page(&lio->oct_dev->pci_dev->dev,
847 g->sg[(i >> 2)].ptr[(i & 3)],
848 skb_frag_size(frag), DMA_TO_DEVICE);
849 i++;
850 }
851
852 iq = skb_iq(lio->oct_dev, skb);
853
854 spin_lock(&lio->glist_lock[iq]);
855 list_add_tail(&g->list, &lio->glist[iq]);
856 spin_unlock(&lio->glist_lock[iq]);
857
858 tx_buffer_free(skb);
859 }
860
861 /**
862 * free_netsgbuf_with_resp - Unmap and free gather buffer with response
863 * @buf: buffer
864 */
free_netsgbuf_with_resp(void * buf)865 static void free_netsgbuf_with_resp(void *buf)
866 {
867 struct octnet_buf_free_info *finfo;
868 struct octeon_soft_command *sc;
869 struct octnic_gather *g;
870 struct sk_buff *skb;
871 int i, frags, iq;
872 struct lio *lio;
873
874 sc = (struct octeon_soft_command *)buf;
875 skb = (struct sk_buff *)sc->callback_arg;
876 finfo = (struct octnet_buf_free_info *)&skb->cb;
877
878 lio = finfo->lio;
879 g = finfo->g;
880 frags = skb_shinfo(skb)->nr_frags;
881
882 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
883 g->sg[0].ptr[0], (skb->len - skb->data_len),
884 DMA_TO_DEVICE);
885
886 i = 1;
887 while (frags--) {
888 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
889
890 dma_unmap_page(&lio->oct_dev->pci_dev->dev,
891 g->sg[(i >> 2)].ptr[(i & 3)],
892 skb_frag_size(frag), DMA_TO_DEVICE);
893 i++;
894 }
895
896 iq = skb_iq(lio->oct_dev, skb);
897
898 spin_lock(&lio->glist_lock[iq]);
899 list_add_tail(&g->list, &lio->glist[iq]);
900 spin_unlock(&lio->glist_lock[iq]);
901
902 /* Don't free the skb yet */
903 }
904
905 /**
906 * liquidio_open - Net device open for LiquidIO
907 * @netdev: network device
908 */
liquidio_open(struct net_device * netdev)909 static int liquidio_open(struct net_device *netdev)
910 {
911 struct lio *lio = GET_LIO(netdev);
912 struct octeon_device *oct = lio->oct_dev;
913 struct octeon_device_priv *oct_priv =
914 (struct octeon_device_priv *)oct->priv;
915 struct napi_struct *napi, *n;
916 int ret = 0;
917
918 if (!oct->props[lio->ifidx].napi_enabled) {
919 tasklet_disable(&oct_priv->droq_tasklet);
920
921 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
922 napi_enable(napi);
923
924 oct->props[lio->ifidx].napi_enabled = 1;
925
926 oct->droq[0]->ops.poll_mode = 1;
927 }
928
929 ifstate_set(lio, LIO_IFSTATE_RUNNING);
930
931 /* Ready for link status updates */
932 lio->intf_open = 1;
933
934 netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
935 start_txqs(netdev);
936
937 INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
938 lio->stats_wk.ctxptr = lio;
939 schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
940 (LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
941
942 /* tell Octeon to start forwarding packets to host */
943 ret = send_rx_ctrl_cmd(lio, 1);
944 if (ret)
945 return ret;
946
947 dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
948
949 return ret;
950 }
951
952 /**
953 * liquidio_stop - jNet device stop for LiquidIO
954 * @netdev: network device
955 */
liquidio_stop(struct net_device * netdev)956 static int liquidio_stop(struct net_device *netdev)
957 {
958 struct lio *lio = GET_LIO(netdev);
959 struct octeon_device *oct = lio->oct_dev;
960 struct octeon_device_priv *oct_priv =
961 (struct octeon_device_priv *)oct->priv;
962 struct napi_struct *napi, *n;
963 int ret = 0;
964
965 /* tell Octeon to stop forwarding packets to host */
966 ret = send_rx_ctrl_cmd(lio, 0);
967 if (ret)
968 return ret;
969
970 netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
971 /* Inform that netif carrier is down */
972 lio->intf_open = 0;
973 lio->linfo.link.s.link_up = 0;
974
975 netif_carrier_off(netdev);
976 lio->link_changes++;
977
978 ifstate_reset(lio, LIO_IFSTATE_RUNNING);
979
980 stop_txqs(netdev);
981
982 /* Wait for any pending Rx descriptors */
983 if (lio_wait_for_clean_oq(oct))
984 netif_info(lio, rx_err, lio->netdev,
985 "Proceeding with stop interface after partial RX desc processing\n");
986
987 if (oct->props[lio->ifidx].napi_enabled == 1) {
988 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
989 napi_disable(napi);
990
991 oct->props[lio->ifidx].napi_enabled = 0;
992
993 oct->droq[0]->ops.poll_mode = 0;
994
995 tasklet_enable(&oct_priv->droq_tasklet);
996 }
997
998 cancel_delayed_work_sync(&lio->stats_wk.work);
999
1000 dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
1001
1002 return ret;
1003 }
1004
1005 /**
1006 * get_new_flags - Converts a mask based on net device flags
1007 * @netdev: network device
1008 *
1009 * This routine generates a octnet_ifflags mask from the net device flags
1010 * received from the OS.
1011 */
get_new_flags(struct net_device * netdev)1012 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1013 {
1014 enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1015
1016 if (netdev->flags & IFF_PROMISC)
1017 f |= OCTNET_IFFLAG_PROMISC;
1018
1019 if (netdev->flags & IFF_ALLMULTI)
1020 f |= OCTNET_IFFLAG_ALLMULTI;
1021
1022 if (netdev->flags & IFF_MULTICAST) {
1023 f |= OCTNET_IFFLAG_MULTICAST;
1024
1025 /* Accept all multicast addresses if there are more than we
1026 * can handle
1027 */
1028 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1029 f |= OCTNET_IFFLAG_ALLMULTI;
1030 }
1031
1032 if (netdev->flags & IFF_BROADCAST)
1033 f |= OCTNET_IFFLAG_BROADCAST;
1034
1035 return f;
1036 }
1037
liquidio_set_uc_list(struct net_device * netdev)1038 static void liquidio_set_uc_list(struct net_device *netdev)
1039 {
1040 struct lio *lio = GET_LIO(netdev);
1041 struct octeon_device *oct = lio->oct_dev;
1042 struct octnic_ctrl_pkt nctrl;
1043 struct netdev_hw_addr *ha;
1044 u64 *mac;
1045
1046 if (lio->netdev_uc_count == netdev_uc_count(netdev))
1047 return;
1048
1049 if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1050 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1051 return;
1052 }
1053
1054 lio->netdev_uc_count = netdev_uc_count(netdev);
1055
1056 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1057 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1058 nctrl.ncmd.s.more = lio->netdev_uc_count;
1059 nctrl.ncmd.s.param1 = oct->vf_num;
1060 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1061 nctrl.netpndev = (u64)netdev;
1062 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1063
1064 /* copy all the addresses into the udd */
1065 mac = &nctrl.udd[0];
1066 netdev_for_each_uc_addr(ha, netdev) {
1067 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1068 mac++;
1069 }
1070
1071 octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1072 }
1073
1074 /**
1075 * liquidio_set_mcast_list - Net device set_multicast_list
1076 * @netdev: network device
1077 */
liquidio_set_mcast_list(struct net_device * netdev)1078 static void liquidio_set_mcast_list(struct net_device *netdev)
1079 {
1080 int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1081 struct lio *lio = GET_LIO(netdev);
1082 struct octeon_device *oct = lio->oct_dev;
1083 struct octnic_ctrl_pkt nctrl;
1084 struct netdev_hw_addr *ha;
1085 u64 *mc;
1086 int ret;
1087
1088 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1089
1090 /* Create a ctrl pkt command to be sent to core app. */
1091 nctrl.ncmd.u64 = 0;
1092 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1093 nctrl.ncmd.s.param1 = get_new_flags(netdev);
1094 nctrl.ncmd.s.param2 = mc_count;
1095 nctrl.ncmd.s.more = mc_count;
1096 nctrl.netpndev = (u64)netdev;
1097 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1098
1099 /* copy all the addresses into the udd */
1100 mc = &nctrl.udd[0];
1101 netdev_for_each_mc_addr(ha, netdev) {
1102 *mc = 0;
1103 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1104 /* no need to swap bytes */
1105 if (++mc > &nctrl.udd[mc_count])
1106 break;
1107 }
1108
1109 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1110
1111 /* Apparently, any activity in this call from the kernel has to
1112 * be atomic. So we won't wait for response.
1113 */
1114
1115 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1116 if (ret) {
1117 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1118 ret);
1119 }
1120
1121 liquidio_set_uc_list(netdev);
1122 }
1123
1124 /**
1125 * liquidio_set_mac - Net device set_mac_address
1126 * @netdev: network device
1127 * @p: opaque pointer to sockaddr
1128 */
liquidio_set_mac(struct net_device * netdev,void * p)1129 static int liquidio_set_mac(struct net_device *netdev, void *p)
1130 {
1131 struct sockaddr *addr = (struct sockaddr *)p;
1132 struct lio *lio = GET_LIO(netdev);
1133 struct octeon_device *oct = lio->oct_dev;
1134 struct octnic_ctrl_pkt nctrl;
1135 int ret = 0;
1136
1137 if (!is_valid_ether_addr(addr->sa_data))
1138 return -EADDRNOTAVAIL;
1139
1140 if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1141 return 0;
1142
1143 if (lio->linfo.macaddr_is_admin_asgnd)
1144 return -EPERM;
1145
1146 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1147
1148 nctrl.ncmd.u64 = 0;
1149 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1150 nctrl.ncmd.s.param1 = 0;
1151 nctrl.ncmd.s.more = 1;
1152 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1153 nctrl.netpndev = (u64)netdev;
1154
1155 nctrl.udd[0] = 0;
1156 /* The MAC Address is presented in network byte order. */
1157 ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1158
1159 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1160 if (ret < 0) {
1161 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1162 return -ENOMEM;
1163 }
1164
1165 if (nctrl.sc_status ==
1166 FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1167 dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1168 return -EPERM;
1169 }
1170
1171 eth_hw_addr_set(netdev, addr->sa_data);
1172 ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1173
1174 return 0;
1175 }
1176
1177 static void
liquidio_get_stats64(struct net_device * netdev,struct rtnl_link_stats64 * lstats)1178 liquidio_get_stats64(struct net_device *netdev,
1179 struct rtnl_link_stats64 *lstats)
1180 {
1181 struct lio *lio = GET_LIO(netdev);
1182 struct octeon_device *oct;
1183 u64 pkts = 0, drop = 0, bytes = 0;
1184 struct oct_droq_stats *oq_stats;
1185 struct oct_iq_stats *iq_stats;
1186 int i, iq_no, oq_no;
1187
1188 oct = lio->oct_dev;
1189
1190 if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1191 return;
1192
1193 for (i = 0; i < oct->num_iqs; i++) {
1194 iq_no = lio->linfo.txpciq[i].s.q_no;
1195 iq_stats = &oct->instr_queue[iq_no]->stats;
1196 pkts += iq_stats->tx_done;
1197 drop += iq_stats->tx_dropped;
1198 bytes += iq_stats->tx_tot_bytes;
1199 }
1200
1201 lstats->tx_packets = pkts;
1202 lstats->tx_bytes = bytes;
1203 lstats->tx_dropped = drop;
1204
1205 pkts = 0;
1206 drop = 0;
1207 bytes = 0;
1208
1209 for (i = 0; i < oct->num_oqs; i++) {
1210 oq_no = lio->linfo.rxpciq[i].s.q_no;
1211 oq_stats = &oct->droq[oq_no]->stats;
1212 pkts += oq_stats->rx_pkts_received;
1213 drop += (oq_stats->rx_dropped +
1214 oq_stats->dropped_nodispatch +
1215 oq_stats->dropped_toomany +
1216 oq_stats->dropped_nomem);
1217 bytes += oq_stats->rx_bytes_received;
1218 }
1219
1220 lstats->rx_bytes = bytes;
1221 lstats->rx_packets = pkts;
1222 lstats->rx_dropped = drop;
1223
1224 lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1225
1226 /* detailed rx_errors: */
1227 lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1228 /* recved pkt with crc error */
1229 lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1230 /* recv'd frame alignment error */
1231 lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1232
1233 lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1234 lstats->rx_frame_errors;
1235
1236 /* detailed tx_errors */
1237 lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1238 lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1239
1240 lstats->tx_errors = lstats->tx_aborted_errors +
1241 lstats->tx_carrier_errors;
1242 }
1243
1244 /**
1245 * hwtstamp_ioctl - Handler for SIOCSHWTSTAMP ioctl
1246 * @netdev: network device
1247 * @ifr: interface request
1248 */
hwtstamp_ioctl(struct net_device * netdev,struct ifreq * ifr)1249 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1250 {
1251 struct lio *lio = GET_LIO(netdev);
1252 struct hwtstamp_config conf;
1253
1254 if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1255 return -EFAULT;
1256
1257 switch (conf.tx_type) {
1258 case HWTSTAMP_TX_ON:
1259 case HWTSTAMP_TX_OFF:
1260 break;
1261 default:
1262 return -ERANGE;
1263 }
1264
1265 switch (conf.rx_filter) {
1266 case HWTSTAMP_FILTER_NONE:
1267 break;
1268 case HWTSTAMP_FILTER_ALL:
1269 case HWTSTAMP_FILTER_SOME:
1270 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1271 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1272 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1273 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1274 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1275 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1276 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1277 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1278 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1279 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1280 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1281 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1282 case HWTSTAMP_FILTER_NTP_ALL:
1283 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1284 break;
1285 default:
1286 return -ERANGE;
1287 }
1288
1289 if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1290 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1291
1292 else
1293 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1294
1295 return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1296 }
1297
1298 /**
1299 * liquidio_ioctl - ioctl handler
1300 * @netdev: network device
1301 * @ifr: interface request
1302 * @cmd: command
1303 */
liquidio_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)1304 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1305 {
1306 switch (cmd) {
1307 case SIOCSHWTSTAMP:
1308 return hwtstamp_ioctl(netdev, ifr);
1309 default:
1310 return -EOPNOTSUPP;
1311 }
1312 }
1313
handle_timestamp(struct octeon_device * oct,u32 status,void * buf)1314 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1315 {
1316 struct sk_buff *skb = (struct sk_buff *)buf;
1317 struct octnet_buf_free_info *finfo;
1318 struct oct_timestamp_resp *resp;
1319 struct octeon_soft_command *sc;
1320 struct lio *lio;
1321
1322 finfo = (struct octnet_buf_free_info *)skb->cb;
1323 lio = finfo->lio;
1324 sc = finfo->sc;
1325 oct = lio->oct_dev;
1326 resp = (struct oct_timestamp_resp *)sc->virtrptr;
1327
1328 if (status != OCTEON_REQUEST_DONE) {
1329 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1330 CVM_CAST64(status));
1331 resp->timestamp = 0;
1332 }
1333
1334 octeon_swap_8B_data(&resp->timestamp, 1);
1335
1336 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1337 struct skb_shared_hwtstamps ts;
1338 u64 ns = resp->timestamp;
1339
1340 netif_info(lio, tx_done, lio->netdev,
1341 "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1342 skb, (unsigned long long)ns);
1343 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1344 skb_tstamp_tx(skb, &ts);
1345 }
1346
1347 octeon_free_soft_command(oct, sc);
1348 tx_buffer_free(skb);
1349 }
1350
1351 /* send_nic_timestamp_pkt - Send a data packet that will be timestamped
1352 * @oct: octeon device
1353 * @ndata: pointer to network data
1354 * @finfo: pointer to private network data
1355 */
send_nic_timestamp_pkt(struct octeon_device * oct,struct octnic_data_pkt * ndata,struct octnet_buf_free_info * finfo,int xmit_more)1356 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1357 struct octnic_data_pkt *ndata,
1358 struct octnet_buf_free_info *finfo,
1359 int xmit_more)
1360 {
1361 struct octeon_soft_command *sc;
1362 int ring_doorbell;
1363 struct lio *lio;
1364 int retval;
1365 u32 len;
1366
1367 lio = finfo->lio;
1368
1369 sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1370 sizeof(struct oct_timestamp_resp));
1371 finfo->sc = sc;
1372
1373 if (!sc) {
1374 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1375 return IQ_SEND_FAILED;
1376 }
1377
1378 if (ndata->reqtype == REQTYPE_NORESP_NET)
1379 ndata->reqtype = REQTYPE_RESP_NET;
1380 else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1381 ndata->reqtype = REQTYPE_RESP_NET_SG;
1382
1383 sc->callback = handle_timestamp;
1384 sc->callback_arg = finfo->skb;
1385 sc->iq_no = ndata->q_no;
1386
1387 len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1388
1389 ring_doorbell = !xmit_more;
1390
1391 retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1392 sc, len, ndata->reqtype);
1393
1394 if (retval == IQ_SEND_FAILED) {
1395 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1396 retval);
1397 octeon_free_soft_command(oct, sc);
1398 } else {
1399 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1400 }
1401
1402 return retval;
1403 }
1404
1405 /**
1406 * liquidio_xmit - Transmit networks packets to the Octeon interface
1407 * @skb: skbuff struct to be passed to network layer.
1408 * @netdev: pointer to network device
1409 * @returns whether the packet was transmitted to the device okay or not
1410 * (NETDEV_TX_OK or NETDEV_TX_BUSY)
1411 */
liquidio_xmit(struct sk_buff * skb,struct net_device * netdev)1412 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1413 {
1414 struct octnet_buf_free_info *finfo;
1415 union octnic_cmd_setup cmdsetup;
1416 struct octnic_data_pkt ndata;
1417 struct octeon_instr_irh *irh;
1418 struct oct_iq_stats *stats;
1419 struct octeon_device *oct;
1420 int q_idx = 0, iq_no = 0;
1421 union tx_info *tx_info;
1422 int xmit_more = 0;
1423 struct lio *lio;
1424 int status = 0;
1425 u64 dptr = 0;
1426 u32 tag = 0;
1427 int j;
1428
1429 lio = GET_LIO(netdev);
1430 oct = lio->oct_dev;
1431
1432 q_idx = skb_iq(lio->oct_dev, skb);
1433 tag = q_idx;
1434 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1435
1436 stats = &oct->instr_queue[iq_no]->stats;
1437
1438 /* Check for all conditions in which the current packet cannot be
1439 * transmitted.
1440 */
1441 if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1442 (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1443 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1444 lio->linfo.link.s.link_up);
1445 goto lio_xmit_failed;
1446 }
1447
1448 /* Use space in skb->cb to store info used to unmap and
1449 * free the buffers.
1450 */
1451 finfo = (struct octnet_buf_free_info *)skb->cb;
1452 finfo->lio = lio;
1453 finfo->skb = skb;
1454 finfo->sc = NULL;
1455
1456 /* Prepare the attributes for the data to be passed to OSI. */
1457 memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1458
1459 ndata.buf = finfo;
1460
1461 ndata.q_no = iq_no;
1462
1463 if (octnet_iq_is_full(oct, ndata.q_no)) {
1464 /* defer sending if queue is full */
1465 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1466 ndata.q_no);
1467 stats->tx_iq_busy++;
1468 return NETDEV_TX_BUSY;
1469 }
1470
1471 ndata.datasize = skb->len;
1472
1473 cmdsetup.u64 = 0;
1474 cmdsetup.s.iq_no = iq_no;
1475
1476 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1477 if (skb->encapsulation) {
1478 cmdsetup.s.tnl_csum = 1;
1479 stats->tx_vxlan++;
1480 } else {
1481 cmdsetup.s.transport_csum = 1;
1482 }
1483 }
1484 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1485 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1486 cmdsetup.s.timestamp = 1;
1487 }
1488
1489 if (!skb_shinfo(skb)->nr_frags) {
1490 cmdsetup.s.u.datasize = skb->len;
1491 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1492 /* Offload checksum calculation for TCP/UDP packets */
1493 dptr = dma_map_single(&oct->pci_dev->dev,
1494 skb->data,
1495 skb->len,
1496 DMA_TO_DEVICE);
1497 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1498 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1499 __func__);
1500 return NETDEV_TX_BUSY;
1501 }
1502
1503 ndata.cmd.cmd3.dptr = dptr;
1504 finfo->dptr = dptr;
1505 ndata.reqtype = REQTYPE_NORESP_NET;
1506
1507 } else {
1508 skb_frag_t *frag;
1509 struct octnic_gather *g;
1510 int i, frags;
1511
1512 spin_lock(&lio->glist_lock[q_idx]);
1513 g = (struct octnic_gather *)
1514 lio_list_delete_head(&lio->glist[q_idx]);
1515 spin_unlock(&lio->glist_lock[q_idx]);
1516
1517 if (!g) {
1518 netif_info(lio, tx_err, lio->netdev,
1519 "Transmit scatter gather: glist null!\n");
1520 goto lio_xmit_failed;
1521 }
1522
1523 cmdsetup.s.gather = 1;
1524 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1525 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1526
1527 memset(g->sg, 0, g->sg_size);
1528
1529 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1530 skb->data,
1531 (skb->len - skb->data_len),
1532 DMA_TO_DEVICE);
1533 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1534 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1535 __func__);
1536 return NETDEV_TX_BUSY;
1537 }
1538 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1539
1540 frags = skb_shinfo(skb)->nr_frags;
1541 i = 1;
1542 while (frags--) {
1543 frag = &skb_shinfo(skb)->frags[i - 1];
1544
1545 g->sg[(i >> 2)].ptr[(i & 3)] =
1546 skb_frag_dma_map(&oct->pci_dev->dev,
1547 frag, 0, skb_frag_size(frag),
1548 DMA_TO_DEVICE);
1549 if (dma_mapping_error(&oct->pci_dev->dev,
1550 g->sg[i >> 2].ptr[i & 3])) {
1551 dma_unmap_single(&oct->pci_dev->dev,
1552 g->sg[0].ptr[0],
1553 skb->len - skb->data_len,
1554 DMA_TO_DEVICE);
1555 for (j = 1; j < i; j++) {
1556 frag = &skb_shinfo(skb)->frags[j - 1];
1557 dma_unmap_page(&oct->pci_dev->dev,
1558 g->sg[j >> 2].ptr[j & 3],
1559 skb_frag_size(frag),
1560 DMA_TO_DEVICE);
1561 }
1562 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1563 __func__);
1564 return NETDEV_TX_BUSY;
1565 }
1566
1567 add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1568 (i & 3));
1569 i++;
1570 }
1571
1572 dptr = g->sg_dma_ptr;
1573
1574 ndata.cmd.cmd3.dptr = dptr;
1575 finfo->dptr = dptr;
1576 finfo->g = g;
1577
1578 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1579 }
1580
1581 irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1582 tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1583
1584 if (skb_shinfo(skb)->gso_size) {
1585 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1586 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1587 }
1588
1589 /* HW insert VLAN tag */
1590 if (skb_vlan_tag_present(skb)) {
1591 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1592 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1593 }
1594
1595 xmit_more = netdev_xmit_more();
1596
1597 if (unlikely(cmdsetup.s.timestamp))
1598 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1599 else
1600 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1601 if (status == IQ_SEND_FAILED)
1602 goto lio_xmit_failed;
1603
1604 netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1605
1606 if (status == IQ_SEND_STOP) {
1607 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1608 iq_no);
1609 netif_stop_subqueue(netdev, q_idx);
1610 }
1611
1612 netif_trans_update(netdev);
1613
1614 if (tx_info->s.gso_segs)
1615 stats->tx_done += tx_info->s.gso_segs;
1616 else
1617 stats->tx_done++;
1618 stats->tx_tot_bytes += ndata.datasize;
1619
1620 return NETDEV_TX_OK;
1621
1622 lio_xmit_failed:
1623 stats->tx_dropped++;
1624 netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1625 iq_no, stats->tx_dropped);
1626 if (dptr)
1627 dma_unmap_single(&oct->pci_dev->dev, dptr,
1628 ndata.datasize, DMA_TO_DEVICE);
1629
1630 octeon_ring_doorbell_locked(oct, iq_no);
1631
1632 tx_buffer_free(skb);
1633 return NETDEV_TX_OK;
1634 }
1635
1636 /**
1637 * liquidio_tx_timeout - Network device Tx timeout
1638 * @netdev: pointer to network device
1639 * @txqueue: index of the hung transmit queue
1640 */
liquidio_tx_timeout(struct net_device * netdev,unsigned int txqueue)1641 static void liquidio_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1642 {
1643 struct lio *lio;
1644
1645 lio = GET_LIO(netdev);
1646
1647 netif_info(lio, tx_err, lio->netdev,
1648 "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1649 netdev->stats.tx_dropped);
1650 netif_trans_update(netdev);
1651 wake_txqs(netdev);
1652 }
1653
1654 static int
liquidio_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)1655 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1656 __be16 proto __attribute__((unused)), u16 vid)
1657 {
1658 struct lio *lio = GET_LIO(netdev);
1659 struct octeon_device *oct = lio->oct_dev;
1660 struct octnic_ctrl_pkt nctrl;
1661 int ret = 0;
1662
1663 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1664
1665 nctrl.ncmd.u64 = 0;
1666 nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1667 nctrl.ncmd.s.param1 = vid;
1668 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1669 nctrl.netpndev = (u64)netdev;
1670 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1671
1672 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1673 if (ret) {
1674 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1675 ret);
1676 return -EPERM;
1677 }
1678
1679 return 0;
1680 }
1681
1682 static int
liquidio_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)1683 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1684 __be16 proto __attribute__((unused)), u16 vid)
1685 {
1686 struct lio *lio = GET_LIO(netdev);
1687 struct octeon_device *oct = lio->oct_dev;
1688 struct octnic_ctrl_pkt nctrl;
1689 int ret = 0;
1690
1691 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1692
1693 nctrl.ncmd.u64 = 0;
1694 nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1695 nctrl.ncmd.s.param1 = vid;
1696 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1697 nctrl.netpndev = (u64)netdev;
1698 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1699
1700 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1701 if (ret) {
1702 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1703 ret);
1704 if (ret > 0)
1705 ret = -EIO;
1706 }
1707 return ret;
1708 }
1709
1710 /** Sending command to enable/disable RX checksum offload
1711 * @param netdev pointer to network device
1712 * @param command OCTNET_CMD_TNL_RX_CSUM_CTL
1713 * @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
1714 * OCTNET_CMD_RXCSUM_DISABLE
1715 * @returns SUCCESS or FAILURE
1716 */
liquidio_set_rxcsum_command(struct net_device * netdev,int command,u8 rx_cmd)1717 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1718 u8 rx_cmd)
1719 {
1720 struct lio *lio = GET_LIO(netdev);
1721 struct octeon_device *oct = lio->oct_dev;
1722 struct octnic_ctrl_pkt nctrl;
1723 int ret = 0;
1724
1725 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1726
1727 nctrl.ncmd.u64 = 0;
1728 nctrl.ncmd.s.cmd = command;
1729 nctrl.ncmd.s.param1 = rx_cmd;
1730 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1731 nctrl.netpndev = (u64)netdev;
1732 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1733
1734 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1735 if (ret) {
1736 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1737 ret);
1738 if (ret > 0)
1739 ret = -EIO;
1740 }
1741 return ret;
1742 }
1743
1744 /** Sending command to add/delete VxLAN UDP port to firmware
1745 * @param netdev pointer to network device
1746 * @param command OCTNET_CMD_VXLAN_PORT_CONFIG
1747 * @param vxlan_port VxLAN port to be added or deleted
1748 * @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
1749 * OCTNET_CMD_VXLAN_PORT_DEL
1750 * @returns SUCCESS or FAILURE
1751 */
liquidio_vxlan_port_command(struct net_device * netdev,int command,u16 vxlan_port,u8 vxlan_cmd_bit)1752 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1753 u16 vxlan_port, u8 vxlan_cmd_bit)
1754 {
1755 struct lio *lio = GET_LIO(netdev);
1756 struct octeon_device *oct = lio->oct_dev;
1757 struct octnic_ctrl_pkt nctrl;
1758 int ret = 0;
1759
1760 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1761
1762 nctrl.ncmd.u64 = 0;
1763 nctrl.ncmd.s.cmd = command;
1764 nctrl.ncmd.s.more = vxlan_cmd_bit;
1765 nctrl.ncmd.s.param1 = vxlan_port;
1766 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1767 nctrl.netpndev = (u64)netdev;
1768 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1769
1770 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1771 if (ret) {
1772 dev_err(&oct->pci_dev->dev,
1773 "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1774 ret);
1775 if (ret > 0)
1776 ret = -EIO;
1777 }
1778 return ret;
1779 }
1780
liquidio_udp_tunnel_set_port(struct net_device * netdev,unsigned int table,unsigned int entry,struct udp_tunnel_info * ti)1781 static int liquidio_udp_tunnel_set_port(struct net_device *netdev,
1782 unsigned int table, unsigned int entry,
1783 struct udp_tunnel_info *ti)
1784 {
1785 return liquidio_vxlan_port_command(netdev,
1786 OCTNET_CMD_VXLAN_PORT_CONFIG,
1787 htons(ti->port),
1788 OCTNET_CMD_VXLAN_PORT_ADD);
1789 }
1790
liquidio_udp_tunnel_unset_port(struct net_device * netdev,unsigned int table,unsigned int entry,struct udp_tunnel_info * ti)1791 static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,
1792 unsigned int table,
1793 unsigned int entry,
1794 struct udp_tunnel_info *ti)
1795 {
1796 return liquidio_vxlan_port_command(netdev,
1797 OCTNET_CMD_VXLAN_PORT_CONFIG,
1798 htons(ti->port),
1799 OCTNET_CMD_VXLAN_PORT_DEL);
1800 }
1801
1802 static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {
1803 .set_port = liquidio_udp_tunnel_set_port,
1804 .unset_port = liquidio_udp_tunnel_unset_port,
1805 .tables = {
1806 { .n_entries = 1024, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
1807 },
1808 };
1809
1810 /** \brief Net device fix features
1811 * @param netdev pointer to network device
1812 * @param request features requested
1813 * @returns updated features list
1814 */
liquidio_fix_features(struct net_device * netdev,netdev_features_t request)1815 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1816 netdev_features_t request)
1817 {
1818 struct lio *lio = netdev_priv(netdev);
1819
1820 if ((request & NETIF_F_RXCSUM) &&
1821 !(lio->dev_capability & NETIF_F_RXCSUM))
1822 request &= ~NETIF_F_RXCSUM;
1823
1824 if ((request & NETIF_F_HW_CSUM) &&
1825 !(lio->dev_capability & NETIF_F_HW_CSUM))
1826 request &= ~NETIF_F_HW_CSUM;
1827
1828 if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1829 request &= ~NETIF_F_TSO;
1830
1831 if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1832 request &= ~NETIF_F_TSO6;
1833
1834 if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1835 request &= ~NETIF_F_LRO;
1836
1837 /* Disable LRO if RXCSUM is off */
1838 if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1839 (lio->dev_capability & NETIF_F_LRO))
1840 request &= ~NETIF_F_LRO;
1841
1842 return request;
1843 }
1844
1845 /** \brief Net device set features
1846 * @param netdev pointer to network device
1847 * @param features features to enable/disable
1848 */
liquidio_set_features(struct net_device * netdev,netdev_features_t features)1849 static int liquidio_set_features(struct net_device *netdev,
1850 netdev_features_t features)
1851 {
1852 struct lio *lio = netdev_priv(netdev);
1853
1854 if (!((netdev->features ^ features) & NETIF_F_LRO))
1855 return 0;
1856
1857 if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1858 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1859 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1860 else if (!(features & NETIF_F_LRO) &&
1861 (lio->dev_capability & NETIF_F_LRO))
1862 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1863 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1864 if (!(netdev->features & NETIF_F_RXCSUM) &&
1865 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1866 (features & NETIF_F_RXCSUM))
1867 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1868 OCTNET_CMD_RXCSUM_ENABLE);
1869 else if ((netdev->features & NETIF_F_RXCSUM) &&
1870 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1871 !(features & NETIF_F_RXCSUM))
1872 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1873 OCTNET_CMD_RXCSUM_DISABLE);
1874
1875 return 0;
1876 }
1877
1878 static const struct net_device_ops lionetdevops = {
1879 .ndo_open = liquidio_open,
1880 .ndo_stop = liquidio_stop,
1881 .ndo_start_xmit = liquidio_xmit,
1882 .ndo_get_stats64 = liquidio_get_stats64,
1883 .ndo_set_mac_address = liquidio_set_mac,
1884 .ndo_set_rx_mode = liquidio_set_mcast_list,
1885 .ndo_tx_timeout = liquidio_tx_timeout,
1886 .ndo_vlan_rx_add_vid = liquidio_vlan_rx_add_vid,
1887 .ndo_vlan_rx_kill_vid = liquidio_vlan_rx_kill_vid,
1888 .ndo_change_mtu = liquidio_change_mtu,
1889 .ndo_eth_ioctl = liquidio_ioctl,
1890 .ndo_fix_features = liquidio_fix_features,
1891 .ndo_set_features = liquidio_set_features,
1892 };
1893
lio_nic_info(struct octeon_recv_info * recv_info,void * buf)1894 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1895 {
1896 struct octeon_device *oct = (struct octeon_device *)buf;
1897 struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1898 union oct_link_status *ls;
1899 int gmxport = 0;
1900 int i;
1901
1902 if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1903 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1904 recv_pkt->buffer_size[0],
1905 recv_pkt->rh.r_nic_info.gmxport);
1906 goto nic_info_err;
1907 }
1908
1909 gmxport = recv_pkt->rh.r_nic_info.gmxport;
1910 ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1911 OCT_DROQ_INFO_SIZE);
1912
1913 octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1914
1915 for (i = 0; i < oct->ifcount; i++) {
1916 if (oct->props[i].gmxport == gmxport) {
1917 update_link_status(oct->props[i].netdev, ls);
1918 break;
1919 }
1920 }
1921
1922 nic_info_err:
1923 for (i = 0; i < recv_pkt->buffer_count; i++)
1924 recv_buffer_free(recv_pkt->buffer_ptr[i]);
1925 octeon_free_recv_info(recv_info);
1926 return 0;
1927 }
1928
1929 /**
1930 * setup_nic_devices - Setup network interfaces
1931 * @octeon_dev: octeon device
1932 *
1933 * Called during init time for each device. It assumes the NIC
1934 * is already up and running. The link information for each
1935 * interface is passed in link_info.
1936 */
setup_nic_devices(struct octeon_device * octeon_dev)1937 static int setup_nic_devices(struct octeon_device *octeon_dev)
1938 {
1939 int retval, num_iqueues, num_oqueues;
1940 u32 resp_size, data_size;
1941 struct liquidio_if_cfg_resp *resp;
1942 struct octeon_soft_command *sc;
1943 union oct_nic_if_cfg if_cfg;
1944 struct octdev_props *props;
1945 struct net_device *netdev;
1946 struct lio_version *vdata;
1947 struct lio *lio = NULL;
1948 u8 mac[ETH_ALEN], i, j;
1949 u32 ifidx_or_pfnum;
1950
1951 ifidx_or_pfnum = octeon_dev->pf_num;
1952
1953 /* This is to handle link status changes */
1954 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1955 lio_nic_info, octeon_dev);
1956
1957 /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1958 * They are handled directly.
1959 */
1960 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1961 free_netbuf);
1962
1963 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1964 free_netsgbuf);
1965
1966 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1967 free_netsgbuf_with_resp);
1968
1969 for (i = 0; i < octeon_dev->ifcount; i++) {
1970 resp_size = sizeof(struct liquidio_if_cfg_resp);
1971 data_size = sizeof(struct lio_version);
1972 sc = (struct octeon_soft_command *)
1973 octeon_alloc_soft_command(octeon_dev, data_size,
1974 resp_size, 0);
1975 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1976 vdata = (struct lio_version *)sc->virtdptr;
1977
1978 *((u64 *)vdata) = 0;
1979 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1980 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1981 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1982
1983 if_cfg.u64 = 0;
1984
1985 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1986 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1987 if_cfg.s.base_queue = 0;
1988
1989 sc->iq_no = 0;
1990
1991 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1992 OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1993 0);
1994
1995 init_completion(&sc->complete);
1996 sc->sc_status = OCTEON_REQUEST_PENDING;
1997
1998 retval = octeon_send_soft_command(octeon_dev, sc);
1999 if (retval == IQ_SEND_FAILED) {
2000 dev_err(&octeon_dev->pci_dev->dev,
2001 "iq/oq config failed status: %x\n", retval);
2002 /* Soft instr is freed by driver in case of failure. */
2003 octeon_free_soft_command(octeon_dev, sc);
2004 return(-EIO);
2005 }
2006
2007 /* Sleep on a wait queue till the cond flag indicates that the
2008 * response arrived or timed-out.
2009 */
2010 retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
2011 if (retval)
2012 return retval;
2013
2014 retval = resp->status;
2015 if (retval) {
2016 dev_err(&octeon_dev->pci_dev->dev,
2017 "iq/oq config failed, retval = %d\n", retval);
2018 WRITE_ONCE(sc->caller_is_done, true);
2019 return -EIO;
2020 }
2021
2022 snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2023 32, "%s",
2024 resp->cfg_info.liquidio_firmware_version);
2025
2026 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2027 (sizeof(struct liquidio_if_cfg_info)) >> 3);
2028
2029 num_iqueues = hweight64(resp->cfg_info.iqmask);
2030 num_oqueues = hweight64(resp->cfg_info.oqmask);
2031
2032 if (!(num_iqueues) || !(num_oqueues)) {
2033 dev_err(&octeon_dev->pci_dev->dev,
2034 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2035 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2036 WRITE_ONCE(sc->caller_is_done, true);
2037 goto setup_nic_dev_done;
2038 }
2039 dev_dbg(&octeon_dev->pci_dev->dev,
2040 "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2041 i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2042 num_iqueues, num_oqueues);
2043
2044 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2045
2046 if (!netdev) {
2047 dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2048 WRITE_ONCE(sc->caller_is_done, true);
2049 goto setup_nic_dev_done;
2050 }
2051
2052 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2053
2054 /* Associate the routines that will handle different
2055 * netdev tasks.
2056 */
2057 netdev->netdev_ops = &lionetdevops;
2058
2059 lio = GET_LIO(netdev);
2060
2061 memset(lio, 0, sizeof(struct lio));
2062
2063 lio->ifidx = ifidx_or_pfnum;
2064
2065 props = &octeon_dev->props[i];
2066 props->gmxport = resp->cfg_info.linfo.gmxport;
2067 props->netdev = netdev;
2068
2069 lio->linfo.num_rxpciq = num_oqueues;
2070 lio->linfo.num_txpciq = num_iqueues;
2071
2072 for (j = 0; j < num_oqueues; j++) {
2073 lio->linfo.rxpciq[j].u64 =
2074 resp->cfg_info.linfo.rxpciq[j].u64;
2075 }
2076 for (j = 0; j < num_iqueues; j++) {
2077 lio->linfo.txpciq[j].u64 =
2078 resp->cfg_info.linfo.txpciq[j].u64;
2079 }
2080
2081 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2082 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2083 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2084 lio->linfo.macaddr_is_admin_asgnd =
2085 resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2086 lio->linfo.macaddr_spoofchk =
2087 resp->cfg_info.linfo.macaddr_spoofchk;
2088
2089 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2090
2091 lio->dev_capability = NETIF_F_HIGHDMA
2092 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2093 | NETIF_F_SG | NETIF_F_RXCSUM
2094 | NETIF_F_TSO | NETIF_F_TSO6
2095 | NETIF_F_GRO
2096 | NETIF_F_LRO;
2097 netif_set_tso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2098
2099 /* Copy of transmit encapsulation capabilities:
2100 * TSO, TSO6, Checksums for this device
2101 */
2102 lio->enc_dev_capability = NETIF_F_IP_CSUM
2103 | NETIF_F_IPV6_CSUM
2104 | NETIF_F_GSO_UDP_TUNNEL
2105 | NETIF_F_HW_CSUM | NETIF_F_SG
2106 | NETIF_F_RXCSUM
2107 | NETIF_F_TSO | NETIF_F_TSO6
2108 | NETIF_F_LRO;
2109
2110 netdev->hw_enc_features =
2111 (lio->enc_dev_capability & ~NETIF_F_LRO);
2112 netdev->udp_tunnel_nic_info = &liquidio_udp_tunnels;
2113
2114 netdev->vlan_features = lio->dev_capability;
2115 /* Add any unchangeable hw features */
2116 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2117 NETIF_F_HW_VLAN_CTAG_RX |
2118 NETIF_F_HW_VLAN_CTAG_TX;
2119
2120 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2121
2122 netdev->hw_features = lio->dev_capability;
2123 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2124
2125 /* MTU range: 68 - 16000 */
2126 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2127 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2128
2129 WRITE_ONCE(sc->caller_is_done, true);
2130
2131 /* Point to the properties for octeon device to which this
2132 * interface belongs.
2133 */
2134 lio->oct_dev = octeon_dev;
2135 lio->octprops = props;
2136 lio->netdev = netdev;
2137
2138 dev_dbg(&octeon_dev->pci_dev->dev,
2139 "if%d gmx: %d hw_addr: 0x%llx\n", i,
2140 lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2141
2142 /* 64-bit swap required on LE machines */
2143 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2144 for (j = 0; j < ETH_ALEN; j++)
2145 mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2146
2147 /* Copy MAC Address to OS network device structure */
2148 eth_hw_addr_set(netdev, mac);
2149
2150 if (liquidio_setup_io_queues(octeon_dev, i,
2151 lio->linfo.num_txpciq,
2152 lio->linfo.num_rxpciq)) {
2153 dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2154 goto setup_nic_dev_free;
2155 }
2156
2157 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2158
2159 /* For VFs, enable Octeon device interrupts here,
2160 * as this is contingent upon IO queue setup
2161 */
2162 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2163 OCTEON_ALL_INTR);
2164
2165 /* By default all interfaces on a single Octeon uses the same
2166 * tx and rx queues
2167 */
2168 lio->txq = lio->linfo.txpciq[0].s.q_no;
2169 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2170
2171 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2172 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2173
2174 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2175 dev_err(&octeon_dev->pci_dev->dev,
2176 "Gather list allocation failed\n");
2177 goto setup_nic_dev_free;
2178 }
2179
2180 /* Register ethtool support */
2181 liquidio_set_ethtool_ops(netdev);
2182 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2183 octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2184 else
2185 octeon_dev->priv_flags = 0x0;
2186
2187 if (netdev->features & NETIF_F_LRO)
2188 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2189 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2190
2191 if (setup_link_status_change_wq(netdev))
2192 goto setup_nic_dev_free;
2193
2194 if (setup_rx_oom_poll_fn(netdev))
2195 goto setup_nic_dev_free;
2196
2197 /* Register the network device with the OS */
2198 if (register_netdev(netdev)) {
2199 dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2200 goto setup_nic_dev_free;
2201 }
2202
2203 dev_dbg(&octeon_dev->pci_dev->dev,
2204 "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2205 i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2206 netif_carrier_off(netdev);
2207 lio->link_changes++;
2208
2209 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2210
2211 /* Sending command to firmware to enable Rx checksum offload
2212 * by default at the time of setup of Liquidio driver for
2213 * this device
2214 */
2215 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2216 OCTNET_CMD_RXCSUM_ENABLE);
2217 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2218 OCTNET_CMD_TXCSUM_ENABLE);
2219
2220 dev_dbg(&octeon_dev->pci_dev->dev,
2221 "NIC ifidx:%d Setup successful\n", i);
2222
2223 octeon_dev->no_speed_setting = 1;
2224 }
2225
2226 return 0;
2227
2228 setup_nic_dev_free:
2229
2230 while (i--) {
2231 dev_err(&octeon_dev->pci_dev->dev,
2232 "NIC ifidx:%d Setup failed\n", i);
2233 liquidio_destroy_nic_device(octeon_dev, i);
2234 }
2235
2236 setup_nic_dev_done:
2237
2238 return -ENODEV;
2239 }
2240
2241 /**
2242 * liquidio_init_nic_module - initialize the NIC
2243 * @oct: octeon device
2244 *
2245 * This initialization routine is called once the Octeon device application is
2246 * up and running
2247 */
liquidio_init_nic_module(struct octeon_device * oct)2248 static int liquidio_init_nic_module(struct octeon_device *oct)
2249 {
2250 int num_nic_ports = 1;
2251 int i, retval = 0;
2252
2253 dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2254
2255 /* only default iq and oq were initialized
2256 * initialize the rest as well run port_config command for each port
2257 */
2258 oct->ifcount = num_nic_ports;
2259 memset(oct->props, 0,
2260 sizeof(struct octdev_props) * num_nic_ports);
2261
2262 for (i = 0; i < MAX_OCTEON_LINKS; i++)
2263 oct->props[i].gmxport = -1;
2264
2265 retval = setup_nic_devices(oct);
2266 if (retval) {
2267 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2268 goto octnet_init_failure;
2269 }
2270
2271 dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2272
2273 return retval;
2274
2275 octnet_init_failure:
2276
2277 oct->ifcount = 0;
2278
2279 return retval;
2280 }
2281
2282 /**
2283 * octeon_device_init - Device initialization for each Octeon device that is probed
2284 * @oct: octeon device
2285 */
octeon_device_init(struct octeon_device * oct)2286 static int octeon_device_init(struct octeon_device *oct)
2287 {
2288 u32 rev_id;
2289 int j;
2290
2291 atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2292
2293 /* Enable access to the octeon device and make its DMA capability
2294 * known to the OS.
2295 */
2296 if (octeon_pci_os_setup(oct))
2297 return 1;
2298 atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2299
2300 oct->chip_id = OCTEON_CN23XX_VF_VID;
2301 pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2302 oct->rev_id = rev_id & 0xff;
2303
2304 if (cn23xx_setup_octeon_vf_device(oct))
2305 return 1;
2306
2307 atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2308
2309 oct->app_mode = CVM_DRV_NIC_APP;
2310
2311 /* Initialize the dispatch mechanism used to push packets arriving on
2312 * Octeon Output queues.
2313 */
2314 if (octeon_init_dispatch_list(oct))
2315 return 1;
2316
2317 atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2318
2319 if (octeon_set_io_queues_off(oct)) {
2320 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2321 return 1;
2322 }
2323
2324 if (oct->fn_list.setup_device_regs(oct)) {
2325 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2326 return 1;
2327 }
2328
2329 /* Initialize soft command buffer pool */
2330 if (octeon_setup_sc_buffer_pool(oct)) {
2331 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2332 return 1;
2333 }
2334 atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2335
2336 /* Setup the data structures that manage this Octeon's Input queues. */
2337 if (octeon_setup_instr_queues(oct)) {
2338 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2339 return 1;
2340 }
2341 atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2342
2343 /* Initialize lists to manage the requests of different types that
2344 * arrive from user & kernel applications for this octeon device.
2345 */
2346 if (octeon_setup_response_list(oct)) {
2347 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2348 return 1;
2349 }
2350 atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2351
2352 if (octeon_setup_output_queues(oct)) {
2353 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2354 return 1;
2355 }
2356 atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2357
2358 if (oct->fn_list.setup_mbox(oct)) {
2359 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2360 return 1;
2361 }
2362 atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2363
2364 if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2365 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2366 return 1;
2367 }
2368 atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2369
2370 dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF: %d ioqs\n",
2371 oct->sriov_info.rings_per_vf);
2372
2373 /* Setup the interrupt handler and record the INT SUM register address*/
2374 if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2375 return 1;
2376
2377 atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2378
2379 /* ***************************************************************
2380 * The interrupts need to be enabled for the PF<-->VF handshake.
2381 * They are [re]-enabled after the PF<-->VF handshake so that the
2382 * correct OQ tick value is used (i.e. the value retrieved from
2383 * the PF as part of the handshake).
2384 */
2385
2386 /* Enable Octeon device interrupts */
2387 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2388
2389 if (cn23xx_octeon_pfvf_handshake(oct))
2390 return 1;
2391
2392 /* Here we [re]-enable the interrupts so that the correct OQ tick value
2393 * is used (i.e. the value that was retrieved during the handshake)
2394 */
2395
2396 /* Enable Octeon device interrupts */
2397 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2398 /* *************************************************************** */
2399
2400 /* Enable the input and output queues for this Octeon device */
2401 if (oct->fn_list.enable_io_queues(oct)) {
2402 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2403 return 1;
2404 }
2405
2406 atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2407
2408 atomic_set(&oct->status, OCT_DEV_HOST_OK);
2409
2410 /* Send Credit for Octeon Output queues. Credits are always sent after
2411 * the output queue is enabled.
2412 */
2413 for (j = 0; j < oct->num_oqs; j++)
2414 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2415
2416 /* Packets can start arriving on the output queues from this point. */
2417
2418 atomic_set(&oct->status, OCT_DEV_CORE_OK);
2419
2420 atomic_set(&oct->status, OCT_DEV_RUNNING);
2421
2422 if (liquidio_init_nic_module(oct))
2423 return 1;
2424
2425 return 0;
2426 }
2427
liquidio_vf_init(void)2428 static int __init liquidio_vf_init(void)
2429 {
2430 octeon_init_device_list(0);
2431 return pci_register_driver(&liquidio_vf_pci_driver);
2432 }
2433
liquidio_vf_exit(void)2434 static void __exit liquidio_vf_exit(void)
2435 {
2436 pci_unregister_driver(&liquidio_vf_pci_driver);
2437
2438 pr_info("LiquidIO_VF network module is now unloaded\n");
2439 }
2440
2441 module_init(liquidio_vf_init);
2442 module_exit(liquidio_vf_exit);
2443