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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / ethernet / cavium / liquidio / lio_vf_main.c
blob103440f97bc849faca66ac760564b8535465e625
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
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 */
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 */
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 */
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 */
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 */
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 */
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 */
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
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 */
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
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 */
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 */
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 (oct->pci_dev->reset_fn)
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 */
598 static void 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;
607
608 sc = (struct octeon_soft_command *)
609 octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
610 16, 0);
611
612 ncmd = (union octnet_cmd *)sc->virtdptr;
613
614 ncmd->u64 = 0;
615 ncmd->s.cmd = OCTNET_CMD_RX_CTL;
616 ncmd->s.param1 = start_stop;
617
618 octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
619
620 sc->iq_no = lio->linfo.txpciq[0].s.q_no;
621
622 octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
623 OPCODE_NIC_CMD, 0, 0, 0);
624
625 init_completion(&sc->complete);
626 sc->sc_status = OCTEON_REQUEST_PENDING;
627
628 retval = octeon_send_soft_command(oct, sc);
629 if (retval == IQ_SEND_FAILED) {
630 netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
631 octeon_free_soft_command(oct, sc);
632 } else {
633 /* Sleep on a wait queue till the cond flag indicates that the
634 * response arrived or timed-out.
635 */
636 retval = wait_for_sc_completion_timeout(oct, sc, 0);
637 if (retval)
638 return;
639
640 oct->props[lio->ifidx].rx_on = start_stop;
641 WRITE_ONCE(sc->caller_is_done, true);
642 }
643 }
644
645 /**
646 * liquidio_destroy_nic_device - Destroy NIC device interface
647 * @oct: octeon device
648 * @ifidx: which interface to destroy
649 *
650 * Cleanup associated with each interface for an Octeon device when NIC
651 * module is being unloaded or if initialization fails during load.
652 */
653 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
654 {
655 struct net_device *netdev = oct->props[ifidx].netdev;
656 struct octeon_device_priv *oct_priv =
657 (struct octeon_device_priv *)oct->priv;
658 struct napi_struct *napi, *n;
659 struct lio *lio;
660
661 if (!netdev) {
662 dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
663 __func__, ifidx);
664 return;
665 }
666
667 lio = GET_LIO(netdev);
668
669 dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
670
671 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
672 liquidio_stop(netdev);
673
674 if (oct->props[lio->ifidx].napi_enabled == 1) {
675 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
676 napi_disable(napi);
677
678 oct->props[lio->ifidx].napi_enabled = 0;
679
680 oct->droq[0]->ops.poll_mode = 0;
681 }
682
683 /* Delete NAPI */
684 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
685 netif_napi_del(napi);
686
687 tasklet_enable(&oct_priv->droq_tasklet);
688
689 if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
690 unregister_netdev(netdev);
691
692 cleanup_rx_oom_poll_fn(netdev);
693
694 cleanup_link_status_change_wq(netdev);
695
696 lio_delete_glists(lio);
697
698 free_netdev(netdev);
699
700 oct->props[ifidx].gmxport = -1;
701
702 oct->props[ifidx].netdev = NULL;
703 }
704
705 /**
706 * liquidio_stop_nic_module - Stop complete NIC functionality
707 * @oct: octeon device
708 */
709 static int liquidio_stop_nic_module(struct octeon_device *oct)
710 {
711 struct lio *lio;
712 int i, j;
713
714 dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
715 if (!oct->ifcount) {
716 dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
717 return 1;
718 }
719
720 spin_lock_bh(&oct->cmd_resp_wqlock);
721 oct->cmd_resp_state = OCT_DRV_OFFLINE;
722 spin_unlock_bh(&oct->cmd_resp_wqlock);
723
724 for (i = 0; i < oct->ifcount; i++) {
725 lio = GET_LIO(oct->props[i].netdev);
726 for (j = 0; j < oct->num_oqs; j++)
727 octeon_unregister_droq_ops(oct,
728 lio->linfo.rxpciq[j].s.q_no);
729 }
730
731 for (i = 0; i < oct->ifcount; i++)
732 liquidio_destroy_nic_device(oct, i);
733
734 dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
735 return 0;
736 }
737
738 /**
739 * liquidio_vf_remove - Cleans up resources at unload time
740 * @pdev: PCI device structure
741 */
742 static void liquidio_vf_remove(struct pci_dev *pdev)
743 {
744 struct octeon_device *oct_dev = pci_get_drvdata(pdev);
745
746 dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
747
748 if (oct_dev->app_mode == CVM_DRV_NIC_APP)
749 liquidio_stop_nic_module(oct_dev);
750
751 /* Reset the octeon device and cleanup all memory allocated for
752 * the octeon device by driver.
753 */
754 octeon_destroy_resources(oct_dev);
755
756 dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
757
758 /* This octeon device has been removed. Update the global
759 * data structure to reflect this. Free the device structure.
760 */
761 octeon_free_device_mem(oct_dev);
762 }
763
764 /**
765 * octeon_pci_os_setup - PCI initialization for each Octeon device.
766 * @oct: octeon device
767 */
768 static int octeon_pci_os_setup(struct octeon_device *oct)
769 {
770 #ifdef CONFIG_PCI_IOV
771 /* setup PCI stuff first */
772 if (!oct->pci_dev->physfn)
773 octeon_pci_flr(oct);
774 #endif
775
776 if (pci_enable_device(oct->pci_dev)) {
777 dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
778 return 1;
779 }
780
781 if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
782 dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
783 pci_disable_device(oct->pci_dev);
784 return 1;
785 }
786
787 /* Enable PCI DMA Master. */
788 pci_set_master(oct->pci_dev);
789
790 return 0;
791 }
792
793 /**
794 * free_netbuf - Unmap and free network buffer
795 * @buf: buffer
796 */
797 static void free_netbuf(void *buf)
798 {
799 struct octnet_buf_free_info *finfo;
800 struct sk_buff *skb;
801 struct lio *lio;
802
803 finfo = (struct octnet_buf_free_info *)buf;
804 skb = finfo->skb;
805 lio = finfo->lio;
806
807 dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
808 DMA_TO_DEVICE);
809
810 tx_buffer_free(skb);
811 }
812
813 /**
814 * free_netsgbuf - Unmap and free gather buffer
815 * @buf: buffer
816 */
817 static void free_netsgbuf(void *buf)
818 {
819 struct octnet_buf_free_info *finfo;
820 struct octnic_gather *g;
821 struct sk_buff *skb;
822 int i, frags, iq;
823 struct lio *lio;
824
825 finfo = (struct octnet_buf_free_info *)buf;
826 skb = finfo->skb;
827 lio = finfo->lio;
828 g = finfo->g;
829 frags = skb_shinfo(skb)->nr_frags;
830
831 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
832 g->sg[0].ptr[0], (skb->len - skb->data_len),
833 DMA_TO_DEVICE);
834
835 i = 1;
836 while (frags--) {
837 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
838
839 pci_unmap_page((lio->oct_dev)->pci_dev,
840 g->sg[(i >> 2)].ptr[(i & 3)],
841 skb_frag_size(frag), DMA_TO_DEVICE);
842 i++;
843 }
844
845 iq = skb_iq(lio->oct_dev, skb);
846
847 spin_lock(&lio->glist_lock[iq]);
848 list_add_tail(&g->list, &lio->glist[iq]);
849 spin_unlock(&lio->glist_lock[iq]);
850
851 tx_buffer_free(skb);
852 }
853
854 /**
855 * free_netsgbuf_with_resp - Unmap and free gather buffer with response
856 * @buf: buffer
857 */
858 static void free_netsgbuf_with_resp(void *buf)
859 {
860 struct octnet_buf_free_info *finfo;
861 struct octeon_soft_command *sc;
862 struct octnic_gather *g;
863 struct sk_buff *skb;
864 int i, frags, iq;
865 struct lio *lio;
866
867 sc = (struct octeon_soft_command *)buf;
868 skb = (struct sk_buff *)sc->callback_arg;
869 finfo = (struct octnet_buf_free_info *)&skb->cb;
870
871 lio = finfo->lio;
872 g = finfo->g;
873 frags = skb_shinfo(skb)->nr_frags;
874
875 dma_unmap_single(&lio->oct_dev->pci_dev->dev,
876 g->sg[0].ptr[0], (skb->len - skb->data_len),
877 DMA_TO_DEVICE);
878
879 i = 1;
880 while (frags--) {
881 skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
882
883 pci_unmap_page((lio->oct_dev)->pci_dev,
884 g->sg[(i >> 2)].ptr[(i & 3)],
885 skb_frag_size(frag), DMA_TO_DEVICE);
886 i++;
887 }
888
889 iq = skb_iq(lio->oct_dev, skb);
890
891 spin_lock(&lio->glist_lock[iq]);
892 list_add_tail(&g->list, &lio->glist[iq]);
893 spin_unlock(&lio->glist_lock[iq]);
894
895 /* Don't free the skb yet */
896 }
897
898 /**
899 * liquidio_open - Net device open for LiquidIO
900 * @netdev: network device
901 */
902 static int liquidio_open(struct net_device *netdev)
903 {
904 struct lio *lio = GET_LIO(netdev);
905 struct octeon_device *oct = lio->oct_dev;
906 struct octeon_device_priv *oct_priv =
907 (struct octeon_device_priv *)oct->priv;
908 struct napi_struct *napi, *n;
909
910 if (!oct->props[lio->ifidx].napi_enabled) {
911 tasklet_disable(&oct_priv->droq_tasklet);
912
913 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
914 napi_enable(napi);
915
916 oct->props[lio->ifidx].napi_enabled = 1;
917
918 oct->droq[0]->ops.poll_mode = 1;
919 }
920
921 ifstate_set(lio, LIO_IFSTATE_RUNNING);
922
923 /* Ready for link status updates */
924 lio->intf_open = 1;
925
926 netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
927 start_txqs(netdev);
928
929 INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
930 lio->stats_wk.ctxptr = lio;
931 schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
932 (LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
933
934 /* tell Octeon to start forwarding packets to host */
935 send_rx_ctrl_cmd(lio, 1);
936
937 dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
938
939 return 0;
940 }
941
942 /**
943 * liquidio_stop - jNet device stop for LiquidIO
944 * @netdev: network device
945 */
946 static int liquidio_stop(struct net_device *netdev)
947 {
948 struct lio *lio = GET_LIO(netdev);
949 struct octeon_device *oct = lio->oct_dev;
950 struct octeon_device_priv *oct_priv =
951 (struct octeon_device_priv *)oct->priv;
952 struct napi_struct *napi, *n;
953
954 /* tell Octeon to stop forwarding packets to host */
955 send_rx_ctrl_cmd(lio, 0);
956
957 netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
958 /* Inform that netif carrier is down */
959 lio->intf_open = 0;
960 lio->linfo.link.s.link_up = 0;
961
962 netif_carrier_off(netdev);
963 lio->link_changes++;
964
965 ifstate_reset(lio, LIO_IFSTATE_RUNNING);
966
967 stop_txqs(netdev);
968
969 /* Wait for any pending Rx descriptors */
970 if (lio_wait_for_clean_oq(oct))
971 netif_info(lio, rx_err, lio->netdev,
972 "Proceeding with stop interface after partial RX desc processing\n");
973
974 if (oct->props[lio->ifidx].napi_enabled == 1) {
975 list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
976 napi_disable(napi);
977
978 oct->props[lio->ifidx].napi_enabled = 0;
979
980 oct->droq[0]->ops.poll_mode = 0;
981
982 tasklet_enable(&oct_priv->droq_tasklet);
983 }
984
985 cancel_delayed_work_sync(&lio->stats_wk.work);
986
987 dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
988
989 return 0;
990 }
991
992 /**
993 * get_new_flags - Converts a mask based on net device flags
994 * @netdev: network device
995 *
996 * This routine generates a octnet_ifflags mask from the net device flags
997 * received from the OS.
998 */
999 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1000 {
1001 enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1002
1003 if (netdev->flags & IFF_PROMISC)
1004 f |= OCTNET_IFFLAG_PROMISC;
1005
1006 if (netdev->flags & IFF_ALLMULTI)
1007 f |= OCTNET_IFFLAG_ALLMULTI;
1008
1009 if (netdev->flags & IFF_MULTICAST) {
1010 f |= OCTNET_IFFLAG_MULTICAST;
1011
1012 /* Accept all multicast addresses if there are more than we
1013 * can handle
1014 */
1015 if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1016 f |= OCTNET_IFFLAG_ALLMULTI;
1017 }
1018
1019 if (netdev->flags & IFF_BROADCAST)
1020 f |= OCTNET_IFFLAG_BROADCAST;
1021
1022 return f;
1023 }
1024
1025 static void liquidio_set_uc_list(struct net_device *netdev)
1026 {
1027 struct lio *lio = GET_LIO(netdev);
1028 struct octeon_device *oct = lio->oct_dev;
1029 struct octnic_ctrl_pkt nctrl;
1030 struct netdev_hw_addr *ha;
1031 u64 *mac;
1032
1033 if (lio->netdev_uc_count == netdev_uc_count(netdev))
1034 return;
1035
1036 if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1037 dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1038 return;
1039 }
1040
1041 lio->netdev_uc_count = netdev_uc_count(netdev);
1042
1043 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1044 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1045 nctrl.ncmd.s.more = lio->netdev_uc_count;
1046 nctrl.ncmd.s.param1 = oct->vf_num;
1047 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1048 nctrl.netpndev = (u64)netdev;
1049 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1050
1051 /* copy all the addresses into the udd */
1052 mac = &nctrl.udd[0];
1053 netdev_for_each_uc_addr(ha, netdev) {
1054 ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1055 mac++;
1056 }
1057
1058 octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1059 }
1060
1061 /**
1062 * liquidio_set_mcast_list - Net device set_multicast_list
1063 * @netdev: network device
1064 */
1065 static void liquidio_set_mcast_list(struct net_device *netdev)
1066 {
1067 int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1068 struct lio *lio = GET_LIO(netdev);
1069 struct octeon_device *oct = lio->oct_dev;
1070 struct octnic_ctrl_pkt nctrl;
1071 struct netdev_hw_addr *ha;
1072 u64 *mc;
1073 int ret;
1074
1075 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1076
1077 /* Create a ctrl pkt command to be sent to core app. */
1078 nctrl.ncmd.u64 = 0;
1079 nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1080 nctrl.ncmd.s.param1 = get_new_flags(netdev);
1081 nctrl.ncmd.s.param2 = mc_count;
1082 nctrl.ncmd.s.more = mc_count;
1083 nctrl.netpndev = (u64)netdev;
1084 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1085
1086 /* copy all the addresses into the udd */
1087 mc = &nctrl.udd[0];
1088 netdev_for_each_mc_addr(ha, netdev) {
1089 *mc = 0;
1090 ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1091 /* no need to swap bytes */
1092 if (++mc > &nctrl.udd[mc_count])
1093 break;
1094 }
1095
1096 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1097
1098 /* Apparently, any activity in this call from the kernel has to
1099 * be atomic. So we won't wait for response.
1100 */
1101
1102 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1103 if (ret) {
1104 dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1105 ret);
1106 }
1107
1108 liquidio_set_uc_list(netdev);
1109 }
1110
1111 /**
1112 * liquidio_set_mac - Net device set_mac_address
1113 * @netdev: network device
1114 * @p: opaque pointer to sockaddr
1115 */
1116 static int liquidio_set_mac(struct net_device *netdev, void *p)
1117 {
1118 struct sockaddr *addr = (struct sockaddr *)p;
1119 struct lio *lio = GET_LIO(netdev);
1120 struct octeon_device *oct = lio->oct_dev;
1121 struct octnic_ctrl_pkt nctrl;
1122 int ret = 0;
1123
1124 if (!is_valid_ether_addr(addr->sa_data))
1125 return -EADDRNOTAVAIL;
1126
1127 if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1128 return 0;
1129
1130 if (lio->linfo.macaddr_is_admin_asgnd)
1131 return -EPERM;
1132
1133 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1134
1135 nctrl.ncmd.u64 = 0;
1136 nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1137 nctrl.ncmd.s.param1 = 0;
1138 nctrl.ncmd.s.more = 1;
1139 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1140 nctrl.netpndev = (u64)netdev;
1141
1142 nctrl.udd[0] = 0;
1143 /* The MAC Address is presented in network byte order. */
1144 ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1145
1146 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1147 if (ret < 0) {
1148 dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1149 return -ENOMEM;
1150 }
1151
1152 if (nctrl.sc_status ==
1153 FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1154 dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1155 return -EPERM;
1156 }
1157
1158 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1159 ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1160
1161 return 0;
1162 }
1163
1164 static void
1165 liquidio_get_stats64(struct net_device *netdev,
1166 struct rtnl_link_stats64 *lstats)
1167 {
1168 struct lio *lio = GET_LIO(netdev);
1169 struct octeon_device *oct;
1170 u64 pkts = 0, drop = 0, bytes = 0;
1171 struct oct_droq_stats *oq_stats;
1172 struct oct_iq_stats *iq_stats;
1173 int i, iq_no, oq_no;
1174
1175 oct = lio->oct_dev;
1176
1177 if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1178 return;
1179
1180 for (i = 0; i < oct->num_iqs; i++) {
1181 iq_no = lio->linfo.txpciq[i].s.q_no;
1182 iq_stats = &oct->instr_queue[iq_no]->stats;
1183 pkts += iq_stats->tx_done;
1184 drop += iq_stats->tx_dropped;
1185 bytes += iq_stats->tx_tot_bytes;
1186 }
1187
1188 lstats->tx_packets = pkts;
1189 lstats->tx_bytes = bytes;
1190 lstats->tx_dropped = drop;
1191
1192 pkts = 0;
1193 drop = 0;
1194 bytes = 0;
1195
1196 for (i = 0; i < oct->num_oqs; i++) {
1197 oq_no = lio->linfo.rxpciq[i].s.q_no;
1198 oq_stats = &oct->droq[oq_no]->stats;
1199 pkts += oq_stats->rx_pkts_received;
1200 drop += (oq_stats->rx_dropped +
1201 oq_stats->dropped_nodispatch +
1202 oq_stats->dropped_toomany +
1203 oq_stats->dropped_nomem);
1204 bytes += oq_stats->rx_bytes_received;
1205 }
1206
1207 lstats->rx_bytes = bytes;
1208 lstats->rx_packets = pkts;
1209 lstats->rx_dropped = drop;
1210
1211 lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1212
1213 /* detailed rx_errors: */
1214 lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1215 /* recved pkt with crc error */
1216 lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1217 /* recv'd frame alignment error */
1218 lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1219
1220 lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1221 lstats->rx_frame_errors;
1222
1223 /* detailed tx_errors */
1224 lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1225 lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1226
1227 lstats->tx_errors = lstats->tx_aborted_errors +
1228 lstats->tx_carrier_errors;
1229 }
1230
1231 /**
1232 * hwtstamp_ioctl - Handler for SIOCSHWTSTAMP ioctl
1233 * @netdev: network device
1234 * @ifr: interface request
1235 */
1236 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1237 {
1238 struct lio *lio = GET_LIO(netdev);
1239 struct hwtstamp_config conf;
1240
1241 if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1242 return -EFAULT;
1243
1244 if (conf.flags)
1245 return -EINVAL;
1246
1247 switch (conf.tx_type) {
1248 case HWTSTAMP_TX_ON:
1249 case HWTSTAMP_TX_OFF:
1250 break;
1251 default:
1252 return -ERANGE;
1253 }
1254
1255 switch (conf.rx_filter) {
1256 case HWTSTAMP_FILTER_NONE:
1257 break;
1258 case HWTSTAMP_FILTER_ALL:
1259 case HWTSTAMP_FILTER_SOME:
1260 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1261 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1262 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1263 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1264 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1265 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1266 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1267 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1268 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1269 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1270 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1271 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1272 case HWTSTAMP_FILTER_NTP_ALL:
1273 conf.rx_filter = HWTSTAMP_FILTER_ALL;
1274 break;
1275 default:
1276 return -ERANGE;
1277 }
1278
1279 if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1280 ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1281
1282 else
1283 ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1284
1285 return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1286 }
1287
1288 /**
1289 * liquidio_ioctl - ioctl handler
1290 * @netdev: network device
1291 * @ifr: interface request
1292 * @cmd: command
1293 */
1294 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1295 {
1296 switch (cmd) {
1297 case SIOCSHWTSTAMP:
1298 return hwtstamp_ioctl(netdev, ifr);
1299 default:
1300 return -EOPNOTSUPP;
1301 }
1302 }
1303
1304 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1305 {
1306 struct sk_buff *skb = (struct sk_buff *)buf;
1307 struct octnet_buf_free_info *finfo;
1308 struct oct_timestamp_resp *resp;
1309 struct octeon_soft_command *sc;
1310 struct lio *lio;
1311
1312 finfo = (struct octnet_buf_free_info *)skb->cb;
1313 lio = finfo->lio;
1314 sc = finfo->sc;
1315 oct = lio->oct_dev;
1316 resp = (struct oct_timestamp_resp *)sc->virtrptr;
1317
1318 if (status != OCTEON_REQUEST_DONE) {
1319 dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1320 CVM_CAST64(status));
1321 resp->timestamp = 0;
1322 }
1323
1324 octeon_swap_8B_data(&resp->timestamp, 1);
1325
1326 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1327 struct skb_shared_hwtstamps ts;
1328 u64 ns = resp->timestamp;
1329
1330 netif_info(lio, tx_done, lio->netdev,
1331 "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1332 skb, (unsigned long long)ns);
1333 ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1334 skb_tstamp_tx(skb, &ts);
1335 }
1336
1337 octeon_free_soft_command(oct, sc);
1338 tx_buffer_free(skb);
1339 }
1340
1341 /* send_nic_timestamp_pkt - Send a data packet that will be timestamped
1342 * @oct: octeon device
1343 * @ndata: pointer to network data
1344 * @finfo: pointer to private network data
1345 */
1346 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1347 struct octnic_data_pkt *ndata,
1348 struct octnet_buf_free_info *finfo,
1349 int xmit_more)
1350 {
1351 struct octeon_soft_command *sc;
1352 int ring_doorbell;
1353 struct lio *lio;
1354 int retval;
1355 u32 len;
1356
1357 lio = finfo->lio;
1358
1359 sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1360 sizeof(struct oct_timestamp_resp));
1361 finfo->sc = sc;
1362
1363 if (!sc) {
1364 dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1365 return IQ_SEND_FAILED;
1366 }
1367
1368 if (ndata->reqtype == REQTYPE_NORESP_NET)
1369 ndata->reqtype = REQTYPE_RESP_NET;
1370 else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1371 ndata->reqtype = REQTYPE_RESP_NET_SG;
1372
1373 sc->callback = handle_timestamp;
1374 sc->callback_arg = finfo->skb;
1375 sc->iq_no = ndata->q_no;
1376
1377 len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1378
1379 ring_doorbell = !xmit_more;
1380
1381 retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1382 sc, len, ndata->reqtype);
1383
1384 if (retval == IQ_SEND_FAILED) {
1385 dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1386 retval);
1387 octeon_free_soft_command(oct, sc);
1388 } else {
1389 netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1390 }
1391
1392 return retval;
1393 }
1394
1395 /**
1396 * liquidio_xmit - Transmit networks packets to the Octeon interface
1397 * @skb: skbuff struct to be passed to network layer.
1398 * @netdev: pointer to network device
1399 * @returns whether the packet was transmitted to the device okay or not
1400 * (NETDEV_TX_OK or NETDEV_TX_BUSY)
1401 */
1402 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1403 {
1404 struct octnet_buf_free_info *finfo;
1405 union octnic_cmd_setup cmdsetup;
1406 struct octnic_data_pkt ndata;
1407 struct octeon_instr_irh *irh;
1408 struct oct_iq_stats *stats;
1409 struct octeon_device *oct;
1410 int q_idx = 0, iq_no = 0;
1411 union tx_info *tx_info;
1412 int xmit_more = 0;
1413 struct lio *lio;
1414 int status = 0;
1415 u64 dptr = 0;
1416 u32 tag = 0;
1417 int j;
1418
1419 lio = GET_LIO(netdev);
1420 oct = lio->oct_dev;
1421
1422 q_idx = skb_iq(lio->oct_dev, skb);
1423 tag = q_idx;
1424 iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1425
1426 stats = &oct->instr_queue[iq_no]->stats;
1427
1428 /* Check for all conditions in which the current packet cannot be
1429 * transmitted.
1430 */
1431 if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1432 (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1433 netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1434 lio->linfo.link.s.link_up);
1435 goto lio_xmit_failed;
1436 }
1437
1438 /* Use space in skb->cb to store info used to unmap and
1439 * free the buffers.
1440 */
1441 finfo = (struct octnet_buf_free_info *)skb->cb;
1442 finfo->lio = lio;
1443 finfo->skb = skb;
1444 finfo->sc = NULL;
1445
1446 /* Prepare the attributes for the data to be passed to OSI. */
1447 memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1448
1449 ndata.buf = finfo;
1450
1451 ndata.q_no = iq_no;
1452
1453 if (octnet_iq_is_full(oct, ndata.q_no)) {
1454 /* defer sending if queue is full */
1455 netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1456 ndata.q_no);
1457 stats->tx_iq_busy++;
1458 return NETDEV_TX_BUSY;
1459 }
1460
1461 ndata.datasize = skb->len;
1462
1463 cmdsetup.u64 = 0;
1464 cmdsetup.s.iq_no = iq_no;
1465
1466 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1467 if (skb->encapsulation) {
1468 cmdsetup.s.tnl_csum = 1;
1469 stats->tx_vxlan++;
1470 } else {
1471 cmdsetup.s.transport_csum = 1;
1472 }
1473 }
1474 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1475 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1476 cmdsetup.s.timestamp = 1;
1477 }
1478
1479 if (!skb_shinfo(skb)->nr_frags) {
1480 cmdsetup.s.u.datasize = skb->len;
1481 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1482 /* Offload checksum calculation for TCP/UDP packets */
1483 dptr = dma_map_single(&oct->pci_dev->dev,
1484 skb->data,
1485 skb->len,
1486 DMA_TO_DEVICE);
1487 if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1488 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1489 __func__);
1490 return NETDEV_TX_BUSY;
1491 }
1492
1493 ndata.cmd.cmd3.dptr = dptr;
1494 finfo->dptr = dptr;
1495 ndata.reqtype = REQTYPE_NORESP_NET;
1496
1497 } else {
1498 skb_frag_t *frag;
1499 struct octnic_gather *g;
1500 int i, frags;
1501
1502 spin_lock(&lio->glist_lock[q_idx]);
1503 g = (struct octnic_gather *)
1504 lio_list_delete_head(&lio->glist[q_idx]);
1505 spin_unlock(&lio->glist_lock[q_idx]);
1506
1507 if (!g) {
1508 netif_info(lio, tx_err, lio->netdev,
1509 "Transmit scatter gather: glist null!\n");
1510 goto lio_xmit_failed;
1511 }
1512
1513 cmdsetup.s.gather = 1;
1514 cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1515 octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1516
1517 memset(g->sg, 0, g->sg_size);
1518
1519 g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1520 skb->data,
1521 (skb->len - skb->data_len),
1522 DMA_TO_DEVICE);
1523 if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1524 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1525 __func__);
1526 return NETDEV_TX_BUSY;
1527 }
1528 add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1529
1530 frags = skb_shinfo(skb)->nr_frags;
1531 i = 1;
1532 while (frags--) {
1533 frag = &skb_shinfo(skb)->frags[i - 1];
1534
1535 g->sg[(i >> 2)].ptr[(i & 3)] =
1536 skb_frag_dma_map(&oct->pci_dev->dev,
1537 frag, 0, skb_frag_size(frag),
1538 DMA_TO_DEVICE);
1539 if (dma_mapping_error(&oct->pci_dev->dev,
1540 g->sg[i >> 2].ptr[i & 3])) {
1541 dma_unmap_single(&oct->pci_dev->dev,
1542 g->sg[0].ptr[0],
1543 skb->len - skb->data_len,
1544 DMA_TO_DEVICE);
1545 for (j = 1; j < i; j++) {
1546 frag = &skb_shinfo(skb)->frags[j - 1];
1547 dma_unmap_page(&oct->pci_dev->dev,
1548 g->sg[j >> 2].ptr[j & 3],
1549 skb_frag_size(frag),
1550 DMA_TO_DEVICE);
1551 }
1552 dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1553 __func__);
1554 return NETDEV_TX_BUSY;
1555 }
1556
1557 add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1558 (i & 3));
1559 i++;
1560 }
1561
1562 dptr = g->sg_dma_ptr;
1563
1564 ndata.cmd.cmd3.dptr = dptr;
1565 finfo->dptr = dptr;
1566 finfo->g = g;
1567
1568 ndata.reqtype = REQTYPE_NORESP_NET_SG;
1569 }
1570
1571 irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1572 tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1573
1574 if (skb_shinfo(skb)->gso_size) {
1575 tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1576 tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1577 }
1578
1579 /* HW insert VLAN tag */
1580 if (skb_vlan_tag_present(skb)) {
1581 irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1582 irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1583 }
1584
1585 xmit_more = netdev_xmit_more();
1586
1587 if (unlikely(cmdsetup.s.timestamp))
1588 status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1589 else
1590 status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1591 if (status == IQ_SEND_FAILED)
1592 goto lio_xmit_failed;
1593
1594 netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1595
1596 if (status == IQ_SEND_STOP) {
1597 dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1598 iq_no);
1599 netif_stop_subqueue(netdev, q_idx);
1600 }
1601
1602 netif_trans_update(netdev);
1603
1604 if (tx_info->s.gso_segs)
1605 stats->tx_done += tx_info->s.gso_segs;
1606 else
1607 stats->tx_done++;
1608 stats->tx_tot_bytes += ndata.datasize;
1609
1610 return NETDEV_TX_OK;
1611
1612 lio_xmit_failed:
1613 stats->tx_dropped++;
1614 netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1615 iq_no, stats->tx_dropped);
1616 if (dptr)
1617 dma_unmap_single(&oct->pci_dev->dev, dptr,
1618 ndata.datasize, DMA_TO_DEVICE);
1619
1620 octeon_ring_doorbell_locked(oct, iq_no);
1621
1622 tx_buffer_free(skb);
1623 return NETDEV_TX_OK;
1624 }
1625
1626 /**
1627 * liquidio_tx_timeout - Network device Tx timeout
1628 * @netdev: pointer to network device
1629 * @txqueue: index of the hung transmit queue
1630 */
1631 static void liquidio_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1632 {
1633 struct lio *lio;
1634
1635 lio = GET_LIO(netdev);
1636
1637 netif_info(lio, tx_err, lio->netdev,
1638 "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1639 netdev->stats.tx_dropped);
1640 netif_trans_update(netdev);
1641 wake_txqs(netdev);
1642 }
1643
1644 static int
1645 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1646 __be16 proto __attribute__((unused)), u16 vid)
1647 {
1648 struct lio *lio = GET_LIO(netdev);
1649 struct octeon_device *oct = lio->oct_dev;
1650 struct octnic_ctrl_pkt nctrl;
1651 int ret = 0;
1652
1653 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1654
1655 nctrl.ncmd.u64 = 0;
1656 nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1657 nctrl.ncmd.s.param1 = vid;
1658 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1659 nctrl.netpndev = (u64)netdev;
1660 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1661
1662 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1663 if (ret) {
1664 dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1665 ret);
1666 return -EPERM;
1667 }
1668
1669 return 0;
1670 }
1671
1672 static int
1673 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1674 __be16 proto __attribute__((unused)), u16 vid)
1675 {
1676 struct lio *lio = GET_LIO(netdev);
1677 struct octeon_device *oct = lio->oct_dev;
1678 struct octnic_ctrl_pkt nctrl;
1679 int ret = 0;
1680
1681 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1682
1683 nctrl.ncmd.u64 = 0;
1684 nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1685 nctrl.ncmd.s.param1 = vid;
1686 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1687 nctrl.netpndev = (u64)netdev;
1688 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1689
1690 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1691 if (ret) {
1692 dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1693 ret);
1694 if (ret > 0)
1695 ret = -EIO;
1696 }
1697 return ret;
1698 }
1699
1700 /** Sending command to enable/disable RX checksum offload
1701 * @param netdev pointer to network device
1702 * @param command OCTNET_CMD_TNL_RX_CSUM_CTL
1703 * @param rx_cmd_bit OCTNET_CMD_RXCSUM_ENABLE/
1704 * OCTNET_CMD_RXCSUM_DISABLE
1705 * @returns SUCCESS or FAILURE
1706 */
1707 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1708 u8 rx_cmd)
1709 {
1710 struct lio *lio = GET_LIO(netdev);
1711 struct octeon_device *oct = lio->oct_dev;
1712 struct octnic_ctrl_pkt nctrl;
1713 int ret = 0;
1714
1715 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1716
1717 nctrl.ncmd.u64 = 0;
1718 nctrl.ncmd.s.cmd = command;
1719 nctrl.ncmd.s.param1 = rx_cmd;
1720 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1721 nctrl.netpndev = (u64)netdev;
1722 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1723
1724 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1725 if (ret) {
1726 dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1727 ret);
1728 if (ret > 0)
1729 ret = -EIO;
1730 }
1731 return ret;
1732 }
1733
1734 /** Sending command to add/delete VxLAN UDP port to firmware
1735 * @param netdev pointer to network device
1736 * @param command OCTNET_CMD_VXLAN_PORT_CONFIG
1737 * @param vxlan_port VxLAN port to be added or deleted
1738 * @param vxlan_cmd_bit OCTNET_CMD_VXLAN_PORT_ADD,
1739 * OCTNET_CMD_VXLAN_PORT_DEL
1740 * @returns SUCCESS or FAILURE
1741 */
1742 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1743 u16 vxlan_port, u8 vxlan_cmd_bit)
1744 {
1745 struct lio *lio = GET_LIO(netdev);
1746 struct octeon_device *oct = lio->oct_dev;
1747 struct octnic_ctrl_pkt nctrl;
1748 int ret = 0;
1749
1750 memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1751
1752 nctrl.ncmd.u64 = 0;
1753 nctrl.ncmd.s.cmd = command;
1754 nctrl.ncmd.s.more = vxlan_cmd_bit;
1755 nctrl.ncmd.s.param1 = vxlan_port;
1756 nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1757 nctrl.netpndev = (u64)netdev;
1758 nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1759
1760 ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1761 if (ret) {
1762 dev_err(&oct->pci_dev->dev,
1763 "DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1764 ret);
1765 if (ret > 0)
1766 ret = -EIO;
1767 }
1768 return ret;
1769 }
1770
1771 static int liquidio_udp_tunnel_set_port(struct net_device *netdev,
1772 unsigned int table, unsigned int entry,
1773 struct udp_tunnel_info *ti)
1774 {
1775 return liquidio_vxlan_port_command(netdev,
1776 OCTNET_CMD_VXLAN_PORT_CONFIG,
1777 htons(ti->port),
1778 OCTNET_CMD_VXLAN_PORT_ADD);
1779 }
1780
1781 static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,
1782 unsigned int table,
1783 unsigned int entry,
1784 struct udp_tunnel_info *ti)
1785 {
1786 return liquidio_vxlan_port_command(netdev,
1787 OCTNET_CMD_VXLAN_PORT_CONFIG,
1788 htons(ti->port),
1789 OCTNET_CMD_VXLAN_PORT_DEL);
1790 }
1791
1792 static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {
1793 .set_port = liquidio_udp_tunnel_set_port,
1794 .unset_port = liquidio_udp_tunnel_unset_port,
1795 .tables = {
1796 { .n_entries = 1024, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
1797 },
1798 };
1799
1800 /** \brief Net device fix features
1801 * @param netdev pointer to network device
1802 * @param request features requested
1803 * @returns updated features list
1804 */
1805 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1806 netdev_features_t request)
1807 {
1808 struct lio *lio = netdev_priv(netdev);
1809
1810 if ((request & NETIF_F_RXCSUM) &&
1811 !(lio->dev_capability & NETIF_F_RXCSUM))
1812 request &= ~NETIF_F_RXCSUM;
1813
1814 if ((request & NETIF_F_HW_CSUM) &&
1815 !(lio->dev_capability & NETIF_F_HW_CSUM))
1816 request &= ~NETIF_F_HW_CSUM;
1817
1818 if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1819 request &= ~NETIF_F_TSO;
1820
1821 if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1822 request &= ~NETIF_F_TSO6;
1823
1824 if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1825 request &= ~NETIF_F_LRO;
1826
1827 /* Disable LRO if RXCSUM is off */
1828 if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1829 (lio->dev_capability & NETIF_F_LRO))
1830 request &= ~NETIF_F_LRO;
1831
1832 return request;
1833 }
1834
1835 /** \brief Net device set features
1836 * @param netdev pointer to network device
1837 * @param features features to enable/disable
1838 */
1839 static int liquidio_set_features(struct net_device *netdev,
1840 netdev_features_t features)
1841 {
1842 struct lio *lio = netdev_priv(netdev);
1843
1844 if (!((netdev->features ^ features) & NETIF_F_LRO))
1845 return 0;
1846
1847 if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1848 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1849 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1850 else if (!(features & NETIF_F_LRO) &&
1851 (lio->dev_capability & NETIF_F_LRO))
1852 liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1853 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1854 if (!(netdev->features & NETIF_F_RXCSUM) &&
1855 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1856 (features & NETIF_F_RXCSUM))
1857 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1858 OCTNET_CMD_RXCSUM_ENABLE);
1859 else if ((netdev->features & NETIF_F_RXCSUM) &&
1860 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1861 !(features & NETIF_F_RXCSUM))
1862 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1863 OCTNET_CMD_RXCSUM_DISABLE);
1864
1865 return 0;
1866 }
1867
1868 static const struct net_device_ops lionetdevops = {
1869 .ndo_open = liquidio_open,
1870 .ndo_stop = liquidio_stop,
1871 .ndo_start_xmit = liquidio_xmit,
1872 .ndo_get_stats64 = liquidio_get_stats64,
1873 .ndo_set_mac_address = liquidio_set_mac,
1874 .ndo_set_rx_mode = liquidio_set_mcast_list,
1875 .ndo_tx_timeout = liquidio_tx_timeout,
1876 .ndo_vlan_rx_add_vid = liquidio_vlan_rx_add_vid,
1877 .ndo_vlan_rx_kill_vid = liquidio_vlan_rx_kill_vid,
1878 .ndo_change_mtu = liquidio_change_mtu,
1879 .ndo_do_ioctl = liquidio_ioctl,
1880 .ndo_fix_features = liquidio_fix_features,
1881 .ndo_set_features = liquidio_set_features,
1882 .ndo_udp_tunnel_add = udp_tunnel_nic_add_port,
1883 .ndo_udp_tunnel_del = udp_tunnel_nic_del_port,
1884 };
1885
1886 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1887 {
1888 struct octeon_device *oct = (struct octeon_device *)buf;
1889 struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1890 union oct_link_status *ls;
1891 int gmxport = 0;
1892 int i;
1893
1894 if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1895 dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1896 recv_pkt->buffer_size[0],
1897 recv_pkt->rh.r_nic_info.gmxport);
1898 goto nic_info_err;
1899 }
1900
1901 gmxport = recv_pkt->rh.r_nic_info.gmxport;
1902 ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1903 OCT_DROQ_INFO_SIZE);
1904
1905 octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1906
1907 for (i = 0; i < oct->ifcount; i++) {
1908 if (oct->props[i].gmxport == gmxport) {
1909 update_link_status(oct->props[i].netdev, ls);
1910 break;
1911 }
1912 }
1913
1914 nic_info_err:
1915 for (i = 0; i < recv_pkt->buffer_count; i++)
1916 recv_buffer_free(recv_pkt->buffer_ptr[i]);
1917 octeon_free_recv_info(recv_info);
1918 return 0;
1919 }
1920
1921 /**
1922 * setup_nic_devices - Setup network interfaces
1923 * @octeon_dev: octeon device
1924 *
1925 * Called during init time for each device. It assumes the NIC
1926 * is already up and running. The link information for each
1927 * interface is passed in link_info.
1928 */
1929 static int setup_nic_devices(struct octeon_device *octeon_dev)
1930 {
1931 int retval, num_iqueues, num_oqueues;
1932 u32 resp_size, data_size;
1933 struct liquidio_if_cfg_resp *resp;
1934 struct octeon_soft_command *sc;
1935 union oct_nic_if_cfg if_cfg;
1936 struct octdev_props *props;
1937 struct net_device *netdev;
1938 struct lio_version *vdata;
1939 struct lio *lio = NULL;
1940 u8 mac[ETH_ALEN], i, j;
1941 u32 ifidx_or_pfnum;
1942
1943 ifidx_or_pfnum = octeon_dev->pf_num;
1944
1945 /* This is to handle link status changes */
1946 octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1947 lio_nic_info, octeon_dev);
1948
1949 /* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1950 * They are handled directly.
1951 */
1952 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1953 free_netbuf);
1954
1955 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1956 free_netsgbuf);
1957
1958 octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1959 free_netsgbuf_with_resp);
1960
1961 for (i = 0; i < octeon_dev->ifcount; i++) {
1962 resp_size = sizeof(struct liquidio_if_cfg_resp);
1963 data_size = sizeof(struct lio_version);
1964 sc = (struct octeon_soft_command *)
1965 octeon_alloc_soft_command(octeon_dev, data_size,
1966 resp_size, 0);
1967 resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1968 vdata = (struct lio_version *)sc->virtdptr;
1969
1970 *((u64 *)vdata) = 0;
1971 vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1972 vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1973 vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1974
1975 if_cfg.u64 = 0;
1976
1977 if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1978 if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1979 if_cfg.s.base_queue = 0;
1980
1981 sc->iq_no = 0;
1982
1983 octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1984 OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1985 0);
1986
1987 init_completion(&sc->complete);
1988 sc->sc_status = OCTEON_REQUEST_PENDING;
1989
1990 retval = octeon_send_soft_command(octeon_dev, sc);
1991 if (retval == IQ_SEND_FAILED) {
1992 dev_err(&octeon_dev->pci_dev->dev,
1993 "iq/oq config failed status: %x\n", retval);
1994 /* Soft instr is freed by driver in case of failure. */
1995 octeon_free_soft_command(octeon_dev, sc);
1996 return(-EIO);
1997 }
1998
1999 /* Sleep on a wait queue till the cond flag indicates that the
2000 * response arrived or timed-out.
2001 */
2002 retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
2003 if (retval)
2004 return retval;
2005
2006 retval = resp->status;
2007 if (retval) {
2008 dev_err(&octeon_dev->pci_dev->dev,
2009 "iq/oq config failed, retval = %d\n", retval);
2010 WRITE_ONCE(sc->caller_is_done, true);
2011 return -EIO;
2012 }
2013
2014 snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2015 32, "%s",
2016 resp->cfg_info.liquidio_firmware_version);
2017
2018 octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2019 (sizeof(struct liquidio_if_cfg_info)) >> 3);
2020
2021 num_iqueues = hweight64(resp->cfg_info.iqmask);
2022 num_oqueues = hweight64(resp->cfg_info.oqmask);
2023
2024 if (!(num_iqueues) || !(num_oqueues)) {
2025 dev_err(&octeon_dev->pci_dev->dev,
2026 "Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2027 resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2028 WRITE_ONCE(sc->caller_is_done, true);
2029 goto setup_nic_dev_done;
2030 }
2031 dev_dbg(&octeon_dev->pci_dev->dev,
2032 "interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2033 i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2034 num_iqueues, num_oqueues);
2035
2036 netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2037
2038 if (!netdev) {
2039 dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2040 WRITE_ONCE(sc->caller_is_done, true);
2041 goto setup_nic_dev_done;
2042 }
2043
2044 SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2045
2046 /* Associate the routines that will handle different
2047 * netdev tasks.
2048 */
2049 netdev->netdev_ops = &lionetdevops;
2050
2051 lio = GET_LIO(netdev);
2052
2053 memset(lio, 0, sizeof(struct lio));
2054
2055 lio->ifidx = ifidx_or_pfnum;
2056
2057 props = &octeon_dev->props[i];
2058 props->gmxport = resp->cfg_info.linfo.gmxport;
2059 props->netdev = netdev;
2060
2061 lio->linfo.num_rxpciq = num_oqueues;
2062 lio->linfo.num_txpciq = num_iqueues;
2063
2064 for (j = 0; j < num_oqueues; j++) {
2065 lio->linfo.rxpciq[j].u64 =
2066 resp->cfg_info.linfo.rxpciq[j].u64;
2067 }
2068 for (j = 0; j < num_iqueues; j++) {
2069 lio->linfo.txpciq[j].u64 =
2070 resp->cfg_info.linfo.txpciq[j].u64;
2071 }
2072
2073 lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2074 lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2075 lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2076 lio->linfo.macaddr_is_admin_asgnd =
2077 resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2078 lio->linfo.macaddr_spoofchk =
2079 resp->cfg_info.linfo.macaddr_spoofchk;
2080
2081 lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2082
2083 lio->dev_capability = NETIF_F_HIGHDMA
2084 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2085 | NETIF_F_SG | NETIF_F_RXCSUM
2086 | NETIF_F_TSO | NETIF_F_TSO6
2087 | NETIF_F_GRO
2088 | NETIF_F_LRO;
2089 netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2090
2091 /* Copy of transmit encapsulation capabilities:
2092 * TSO, TSO6, Checksums for this device
2093 */
2094 lio->enc_dev_capability = NETIF_F_IP_CSUM
2095 | NETIF_F_IPV6_CSUM
2096 | NETIF_F_GSO_UDP_TUNNEL
2097 | NETIF_F_HW_CSUM | NETIF_F_SG
2098 | NETIF_F_RXCSUM
2099 | NETIF_F_TSO | NETIF_F_TSO6
2100 | NETIF_F_LRO;
2101
2102 netdev->hw_enc_features =
2103 (lio->enc_dev_capability & ~NETIF_F_LRO);
2104 netdev->udp_tunnel_nic_info = &liquidio_udp_tunnels;
2105
2106 netdev->vlan_features = lio->dev_capability;
2107 /* Add any unchangeable hw features */
2108 lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2109 NETIF_F_HW_VLAN_CTAG_RX |
2110 NETIF_F_HW_VLAN_CTAG_TX;
2111
2112 netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2113
2114 netdev->hw_features = lio->dev_capability;
2115 netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2116
2117 /* MTU range: 68 - 16000 */
2118 netdev->min_mtu = LIO_MIN_MTU_SIZE;
2119 netdev->max_mtu = LIO_MAX_MTU_SIZE;
2120
2121 WRITE_ONCE(sc->caller_is_done, true);
2122
2123 /* Point to the properties for octeon device to which this
2124 * interface belongs.
2125 */
2126 lio->oct_dev = octeon_dev;
2127 lio->octprops = props;
2128 lio->netdev = netdev;
2129
2130 dev_dbg(&octeon_dev->pci_dev->dev,
2131 "if%d gmx: %d hw_addr: 0x%llx\n", i,
2132 lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2133
2134 /* 64-bit swap required on LE machines */
2135 octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2136 for (j = 0; j < ETH_ALEN; j++)
2137 mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2138
2139 /* Copy MAC Address to OS network device structure */
2140 ether_addr_copy(netdev->dev_addr, mac);
2141
2142 if (liquidio_setup_io_queues(octeon_dev, i,
2143 lio->linfo.num_txpciq,
2144 lio->linfo.num_rxpciq)) {
2145 dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2146 goto setup_nic_dev_free;
2147 }
2148
2149 ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2150
2151 /* For VFs, enable Octeon device interrupts here,
2152 * as this is contingent upon IO queue setup
2153 */
2154 octeon_dev->fn_list.enable_interrupt(octeon_dev,
2155 OCTEON_ALL_INTR);
2156
2157 /* By default all interfaces on a single Octeon uses the same
2158 * tx and rx queues
2159 */
2160 lio->txq = lio->linfo.txpciq[0].s.q_no;
2161 lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2162
2163 lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2164 lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2165
2166 if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2167 dev_err(&octeon_dev->pci_dev->dev,
2168 "Gather list allocation failed\n");
2169 goto setup_nic_dev_free;
2170 }
2171
2172 /* Register ethtool support */
2173 liquidio_set_ethtool_ops(netdev);
2174 if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2175 octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2176 else
2177 octeon_dev->priv_flags = 0x0;
2178
2179 if (netdev->features & NETIF_F_LRO)
2180 liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2181 OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2182
2183 if (setup_link_status_change_wq(netdev))
2184 goto setup_nic_dev_free;
2185
2186 if (setup_rx_oom_poll_fn(netdev))
2187 goto setup_nic_dev_free;
2188
2189 /* Register the network device with the OS */
2190 if (register_netdev(netdev)) {
2191 dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2192 goto setup_nic_dev_free;
2193 }
2194
2195 dev_dbg(&octeon_dev->pci_dev->dev,
2196 "Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2197 i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2198 netif_carrier_off(netdev);
2199 lio->link_changes++;
2200
2201 ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2202
2203 /* Sending command to firmware to enable Rx checksum offload
2204 * by default at the time of setup of Liquidio driver for
2205 * this device
2206 */
2207 liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2208 OCTNET_CMD_RXCSUM_ENABLE);
2209 liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2210 OCTNET_CMD_TXCSUM_ENABLE);
2211
2212 dev_dbg(&octeon_dev->pci_dev->dev,
2213 "NIC ifidx:%d Setup successful\n", i);
2214
2215 octeon_dev->no_speed_setting = 1;
2216 }
2217
2218 return 0;
2219
2220 setup_nic_dev_free:
2221
2222 while (i--) {
2223 dev_err(&octeon_dev->pci_dev->dev,
2224 "NIC ifidx:%d Setup failed\n", i);
2225 liquidio_destroy_nic_device(octeon_dev, i);
2226 }
2227
2228 setup_nic_dev_done:
2229
2230 return -ENODEV;
2231 }
2232
2233 /**
2234 * liquidio_init_nic_module - initialize the NIC
2235 * @oct: octeon device
2236 *
2237 * This initialization routine is called once the Octeon device application is
2238 * up and running
2239 */
2240 static int liquidio_init_nic_module(struct octeon_device *oct)
2241 {
2242 int num_nic_ports = 1;
2243 int i, retval = 0;
2244
2245 dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2246
2247 /* only default iq and oq were initialized
2248 * initialize the rest as well run port_config command for each port
2249 */
2250 oct->ifcount = num_nic_ports;
2251 memset(oct->props, 0,
2252 sizeof(struct octdev_props) * num_nic_ports);
2253
2254 for (i = 0; i < MAX_OCTEON_LINKS; i++)
2255 oct->props[i].gmxport = -1;
2256
2257 retval = setup_nic_devices(oct);
2258 if (retval) {
2259 dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2260 goto octnet_init_failure;
2261 }
2262
2263 dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2264
2265 return retval;
2266
2267 octnet_init_failure:
2268
2269 oct->ifcount = 0;
2270
2271 return retval;
2272 }
2273
2274 /**
2275 * octeon_device_init - Device initialization for each Octeon device that is probed
2276 * @oct: octeon device
2277 */
2278 static int octeon_device_init(struct octeon_device *oct)
2279 {
2280 u32 rev_id;
2281 int j;
2282
2283 atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2284
2285 /* Enable access to the octeon device and make its DMA capability
2286 * known to the OS.
2287 */
2288 if (octeon_pci_os_setup(oct))
2289 return 1;
2290 atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2291
2292 oct->chip_id = OCTEON_CN23XX_VF_VID;
2293 pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2294 oct->rev_id = rev_id & 0xff;
2295
2296 if (cn23xx_setup_octeon_vf_device(oct))
2297 return 1;
2298
2299 atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2300
2301 oct->app_mode = CVM_DRV_NIC_APP;
2302
2303 /* Initialize the dispatch mechanism used to push packets arriving on
2304 * Octeon Output queues.
2305 */
2306 if (octeon_init_dispatch_list(oct))
2307 return 1;
2308
2309 atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2310
2311 if (octeon_set_io_queues_off(oct)) {
2312 dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2313 return 1;
2314 }
2315
2316 if (oct->fn_list.setup_device_regs(oct)) {
2317 dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2318 return 1;
2319 }
2320
2321 /* Initialize soft command buffer pool */
2322 if (octeon_setup_sc_buffer_pool(oct)) {
2323 dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2324 return 1;
2325 }
2326 atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2327
2328 /* Setup the data structures that manage this Octeon's Input queues. */
2329 if (octeon_setup_instr_queues(oct)) {
2330 dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2331 return 1;
2332 }
2333 atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2334
2335 /* Initialize lists to manage the requests of different types that
2336 * arrive from user & kernel applications for this octeon device.
2337 */
2338 if (octeon_setup_response_list(oct)) {
2339 dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2340 return 1;
2341 }
2342 atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2343
2344 if (octeon_setup_output_queues(oct)) {
2345 dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2346 return 1;
2347 }
2348 atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2349
2350 if (oct->fn_list.setup_mbox(oct)) {
2351 dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2352 return 1;
2353 }
2354 atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2355
2356 if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2357 dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2358 return 1;
2359 }
2360 atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2361
2362 dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF: %d ioqs\n",
2363 oct->sriov_info.rings_per_vf);
2364
2365 /* Setup the interrupt handler and record the INT SUM register address*/
2366 if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2367 return 1;
2368
2369 atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2370
2371 /* ***************************************************************
2372 * The interrupts need to be enabled for the PF<-->VF handshake.
2373 * They are [re]-enabled after the PF<-->VF handshake so that the
2374 * correct OQ tick value is used (i.e. the value retrieved from
2375 * the PF as part of the handshake).
2376 */
2377
2378 /* Enable Octeon device interrupts */
2379 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2380
2381 if (cn23xx_octeon_pfvf_handshake(oct))
2382 return 1;
2383
2384 /* Here we [re]-enable the interrupts so that the correct OQ tick value
2385 * is used (i.e. the value that was retrieved during the handshake)
2386 */
2387
2388 /* Enable Octeon device interrupts */
2389 oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2390 /* *************************************************************** */
2391
2392 /* Enable the input and output queues for this Octeon device */
2393 if (oct->fn_list.enable_io_queues(oct)) {
2394 dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2395 return 1;
2396 }
2397
2398 atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2399
2400 atomic_set(&oct->status, OCT_DEV_HOST_OK);
2401
2402 /* Send Credit for Octeon Output queues. Credits are always sent after
2403 * the output queue is enabled.
2404 */
2405 for (j = 0; j < oct->num_oqs; j++)
2406 writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2407
2408 /* Packets can start arriving on the output queues from this point. */
2409
2410 atomic_set(&oct->status, OCT_DEV_CORE_OK);
2411
2412 atomic_set(&oct->status, OCT_DEV_RUNNING);
2413
2414 if (liquidio_init_nic_module(oct))
2415 return 1;
2416
2417 return 0;
2418 }
2419
2420 static int __init liquidio_vf_init(void)
2421 {
2422 octeon_init_device_list(0);
2423 return pci_register_driver(&liquidio_vf_pci_driver);
2424 }
2425
2426 static void __exit liquidio_vf_exit(void)
2427 {
2428 pci_unregister_driver(&liquidio_vf_pci_driver);
2429
2430 pr_info("LiquidIO_VF network module is now unloaded\n");
2431 }
2432
2433 module_init(liquidio_vf_init);
2434 module_exit(liquidio_vf_exit);
Linux with added FPC-III support