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