1 /**********************************************************************
2  * Author: Cavium, Inc.
3  *
4  * Contact: support@cavium.com
5  *          Please include "LiquidIO" in the subject.
6  *
7  * Copyright (c) 2003-2016 Cavium, Inc.
8  *
9  * This file is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License, Version 2, as
11  * published by the Free Software Foundation.
12  *
13  * This file is distributed in the hope that it will be useful, but
14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16  * NONINFRINGEMENT.  See the GNU General Public License for more details.
17  ***********************************************************************/
18 #include <linux/module.h>
19 #include <linux/interrupt.h>
20 #include <linux/pci.h>
21 #include <net/vxlan.h>
22 #include "liquidio_common.h"
23 #include "octeon_droq.h"
24 #include "octeon_iq.h"
25 #include "response_manager.h"
26 #include "octeon_device.h"
27 #include "octeon_nic.h"
28 #include "octeon_main.h"
29 #include "octeon_network.h"
30 #include "cn23xx_vf_device.h"
31 
32 MODULE_AUTHOR("Cavium Networks, <support@cavium.com>");
33 MODULE_DESCRIPTION("Cavium LiquidIO Intelligent Server Adapter Virtual Function Driver");
34 MODULE_LICENSE("GPL");
35 MODULE_VERSION(LIQUIDIO_VERSION);
36 
37 static int debug = -1;
38 module_param(debug, int, 0644);
39 MODULE_PARM_DESC(debug, "NETIF_MSG debug bits");
40 
41 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
42 
43 struct oct_timestamp_resp {
44 	u64 rh;
45 	u64 timestamp;
46 	u64 status;
47 };
48 
49 union tx_info {
50 	u64 u64;
51 	struct {
52 #ifdef __BIG_ENDIAN_BITFIELD
53 		u16 gso_size;
54 		u16 gso_segs;
55 		u32 reserved;
56 #else
57 		u32 reserved;
58 		u16 gso_segs;
59 		u16 gso_size;
60 #endif
61 	} s;
62 };
63 
64 #define OCTNIC_GSO_MAX_HEADER_SIZE 128
65 #define OCTNIC_GSO_MAX_SIZE \
66 		(CN23XX_DEFAULT_INPUT_JABBER - OCTNIC_GSO_MAX_HEADER_SIZE)
67 
68 static int
69 liquidio_vf_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
70 static void liquidio_vf_remove(struct pci_dev *pdev);
71 static int octeon_device_init(struct octeon_device *oct);
72 static int liquidio_stop(struct net_device *netdev);
73 
74 static int lio_wait_for_oq_pkts(struct octeon_device *oct)
75 {
76 	struct octeon_device_priv *oct_priv =
77 	    (struct octeon_device_priv *)oct->priv;
78 	int retry = MAX_IO_PENDING_PKT_COUNT;
79 	int pkt_cnt = 0, pending_pkts;
80 	int i;
81 
82 	do {
83 		pending_pkts = 0;
84 
85 		for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
86 			if (!(oct->io_qmask.oq & BIT_ULL(i)))
87 				continue;
88 			pkt_cnt += octeon_droq_check_hw_for_pkts(oct->droq[i]);
89 		}
90 		if (pkt_cnt > 0) {
91 			pending_pkts += pkt_cnt;
92 			tasklet_schedule(&oct_priv->droq_tasklet);
93 		}
94 		pkt_cnt = 0;
95 		schedule_timeout_uninterruptible(1);
96 
97 	} while (retry-- && pending_pkts);
98 
99 	return pkt_cnt;
100 }
101 
102 /**
103  * \brief Cause device to go quiet so it can be safely removed/reset/etc
104  * @param oct Pointer to Octeon device
105  */
106 static void pcierror_quiesce_device(struct octeon_device *oct)
107 {
108 	int i;
109 
110 	/* Disable the input and output queues now. No more packets will
111 	 * arrive from Octeon, but we should wait for all packet processing
112 	 * to finish.
113 	 */
114 
115 	/* To allow for in-flight requests */
116 	schedule_timeout_uninterruptible(100);
117 
118 	if (wait_for_pending_requests(oct))
119 		dev_err(&oct->pci_dev->dev, "There were pending requests\n");
120 
121 	/* Force all requests waiting to be fetched by OCTEON to complete. */
122 	for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
123 		struct octeon_instr_queue *iq;
124 
125 		if (!(oct->io_qmask.iq & BIT_ULL(i)))
126 			continue;
127 		iq = oct->instr_queue[i];
128 
129 		if (atomic_read(&iq->instr_pending)) {
130 			spin_lock_bh(&iq->lock);
131 			iq->fill_cnt = 0;
132 			iq->octeon_read_index = iq->host_write_index;
133 			iq->stats.instr_processed +=
134 			    atomic_read(&iq->instr_pending);
135 			lio_process_iq_request_list(oct, iq, 0);
136 			spin_unlock_bh(&iq->lock);
137 		}
138 	}
139 
140 	/* Force all pending ordered list requests to time out. */
141 	lio_process_ordered_list(oct, 1);
142 
143 	/* We do not need to wait for output queue packets to be processed. */
144 }
145 
146 /**
147  * \brief Cleanup PCI AER uncorrectable error status
148  * @param dev Pointer to PCI device
149  */
150 static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
151 {
152 	u32 status, mask;
153 	int pos = 0x100;
154 
155 	pr_info("%s :\n", __func__);
156 
157 	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
158 	pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
159 	if (dev->error_state == pci_channel_io_normal)
160 		status &= ~mask; /* Clear corresponding nonfatal bits */
161 	else
162 		status &= mask; /* Clear corresponding fatal bits */
163 	pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
164 }
165 
166 /**
167  * \brief Stop all PCI IO to a given device
168  * @param dev Pointer to Octeon device
169  */
170 static void stop_pci_io(struct octeon_device *oct)
171 {
172 	struct msix_entry *msix_entries;
173 	int i;
174 
175 	/* No more instructions will be forwarded. */
176 	atomic_set(&oct->status, OCT_DEV_IN_RESET);
177 
178 	for (i = 0; i < oct->ifcount; i++)
179 		netif_device_detach(oct->props[i].netdev);
180 
181 	/* Disable interrupts  */
182 	oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
183 
184 	pcierror_quiesce_device(oct);
185 	if (oct->msix_on) {
186 		msix_entries = (struct msix_entry *)oct->msix_entries;
187 		for (i = 0; i < oct->num_msix_irqs; i++) {
188 			/* clear the affinity_cpumask */
189 			irq_set_affinity_hint(msix_entries[i].vector,
190 					      NULL);
191 			free_irq(msix_entries[i].vector,
192 				 &oct->ioq_vector[i]);
193 		}
194 		pci_disable_msix(oct->pci_dev);
195 		kfree(oct->msix_entries);
196 		oct->msix_entries = NULL;
197 		octeon_free_ioq_vector(oct);
198 	}
199 	dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
200 		lio_get_state_string(&oct->status));
201 
202 	/* making it a common function for all OCTEON models */
203 	cleanup_aer_uncorrect_error_status(oct->pci_dev);
204 
205 	pci_disable_device(oct->pci_dev);
206 }
207 
208 /**
209  * \brief called when PCI error is detected
210  * @param pdev Pointer to PCI device
211  * @param state The current pci connection state
212  *
213  * This function is called after a PCI bus error affecting
214  * this device has been detected.
215  */
216 static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
217 						     pci_channel_state_t state)
218 {
219 	struct octeon_device *oct = pci_get_drvdata(pdev);
220 
221 	/* Non-correctable Non-fatal errors */
222 	if (state == pci_channel_io_normal) {
223 		dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
224 		cleanup_aer_uncorrect_error_status(oct->pci_dev);
225 		return PCI_ERS_RESULT_CAN_RECOVER;
226 	}
227 
228 	/* Non-correctable Fatal errors */
229 	dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
230 	stop_pci_io(oct);
231 
232 	return PCI_ERS_RESULT_DISCONNECT;
233 }
234 
235 /* For PCI-E Advanced Error Recovery (AER) Interface */
236 static const struct pci_error_handlers liquidio_vf_err_handler = {
237 	.error_detected = liquidio_pcie_error_detected,
238 };
239 
240 static const struct pci_device_id liquidio_vf_pci_tbl[] = {
241 	{
242 		PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
243 		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0
244 	},
245 	{
246 		0, 0, 0, 0, 0, 0, 0
247 	}
248 };
249 MODULE_DEVICE_TABLE(pci, liquidio_vf_pci_tbl);
250 
251 static struct pci_driver liquidio_vf_pci_driver = {
252 	.name		= "LiquidIO_VF",
253 	.id_table	= liquidio_vf_pci_tbl,
254 	.probe		= liquidio_vf_probe,
255 	.remove		= liquidio_vf_remove,
256 	.err_handler	= &liquidio_vf_err_handler,    /* For AER */
257 };
258 
259 /**
260  * \brief Print link information
261  * @param netdev network device
262  */
263 static void print_link_info(struct net_device *netdev)
264 {
265 	struct lio *lio = GET_LIO(netdev);
266 
267 	if (!ifstate_check(lio, LIO_IFSTATE_RESETTING) &&
268 	    ifstate_check(lio, LIO_IFSTATE_REGISTERED)) {
269 		struct oct_link_info *linfo = &lio->linfo;
270 
271 		if (linfo->link.s.link_up) {
272 			netif_info(lio, link, lio->netdev, "%d Mbps %s Duplex UP\n",
273 				   linfo->link.s.speed,
274 				   (linfo->link.s.duplex) ? "Full" : "Half");
275 		} else {
276 			netif_info(lio, link, lio->netdev, "Link Down\n");
277 		}
278 	}
279 }
280 
281 /**
282  * \brief Routine to notify MTU change
283  * @param work work_struct data structure
284  */
285 static void octnet_link_status_change(struct work_struct *work)
286 {
287 	struct cavium_wk *wk = (struct cavium_wk *)work;
288 	struct lio *lio = (struct lio *)wk->ctxptr;
289 
290 	/* lio->linfo.link.s.mtu always contains max MTU of the lio interface.
291 	 * this API is invoked only when new max-MTU of the interface is
292 	 * less than current MTU.
293 	 */
294 	rtnl_lock();
295 	dev_set_mtu(lio->netdev, lio->linfo.link.s.mtu);
296 	rtnl_unlock();
297 }
298 
299 /**
300  * \brief Sets up the mtu status change work
301  * @param netdev network device
302  */
303 static int setup_link_status_change_wq(struct net_device *netdev)
304 {
305 	struct lio *lio = GET_LIO(netdev);
306 	struct octeon_device *oct = lio->oct_dev;
307 
308 	lio->link_status_wq.wq = alloc_workqueue("link-status",
309 						 WQ_MEM_RECLAIM, 0);
310 	if (!lio->link_status_wq.wq) {
311 		dev_err(&oct->pci_dev->dev, "unable to create cavium link status wq\n");
312 		return -1;
313 	}
314 	INIT_DELAYED_WORK(&lio->link_status_wq.wk.work,
315 			  octnet_link_status_change);
316 	lio->link_status_wq.wk.ctxptr = lio;
317 
318 	return 0;
319 }
320 
321 static void cleanup_link_status_change_wq(struct net_device *netdev)
322 {
323 	struct lio *lio = GET_LIO(netdev);
324 
325 	if (lio->link_status_wq.wq) {
326 		cancel_delayed_work_sync(&lio->link_status_wq.wk.work);
327 		destroy_workqueue(lio->link_status_wq.wq);
328 	}
329 }
330 
331 /**
332  * \brief Update link status
333  * @param netdev network device
334  * @param ls link status structure
335  *
336  * Called on receipt of a link status response from the core application to
337  * update each interface's link status.
338  */
339 static void update_link_status(struct net_device *netdev,
340 			       union oct_link_status *ls)
341 {
342 	struct lio *lio = GET_LIO(netdev);
343 	int current_max_mtu = lio->linfo.link.s.mtu;
344 	struct octeon_device *oct = lio->oct_dev;
345 
346 	if ((lio->intf_open) && (lio->linfo.link.u64 != ls->u64)) {
347 		lio->linfo.link.u64 = ls->u64;
348 
349 		print_link_info(netdev);
350 		lio->link_changes++;
351 
352 		if (lio->linfo.link.s.link_up) {
353 			netif_carrier_on(netdev);
354 			wake_txqs(netdev);
355 		} else {
356 			netif_carrier_off(netdev);
357 			stop_txqs(netdev);
358 		}
359 
360 		if (lio->linfo.link.s.mtu != current_max_mtu) {
361 			dev_info(&oct->pci_dev->dev,
362 				 "Max MTU Changed from %d to %d\n",
363 				 current_max_mtu, lio->linfo.link.s.mtu);
364 			netdev->max_mtu = lio->linfo.link.s.mtu;
365 		}
366 
367 		if (lio->linfo.link.s.mtu < netdev->mtu) {
368 			dev_warn(&oct->pci_dev->dev,
369 				 "Current MTU is higher than new max MTU; Reducing the current mtu from %d to %d\n",
370 				 netdev->mtu, lio->linfo.link.s.mtu);
371 			queue_delayed_work(lio->link_status_wq.wq,
372 					   &lio->link_status_wq.wk.work, 0);
373 		}
374 	}
375 }
376 
377 /**
378  * \brief PCI probe handler
379  * @param pdev PCI device structure
380  * @param ent unused
381  */
382 static int
383 liquidio_vf_probe(struct pci_dev *pdev,
384 		  const struct pci_device_id *ent __attribute__((unused)))
385 {
386 	struct octeon_device *oct_dev = NULL;
387 
388 	oct_dev = octeon_allocate_device(pdev->device,
389 					 sizeof(struct octeon_device_priv));
390 
391 	if (!oct_dev) {
392 		dev_err(&pdev->dev, "Unable to allocate device\n");
393 		return -ENOMEM;
394 	}
395 	oct_dev->msix_on = LIO_FLAG_MSIX_ENABLED;
396 
397 	dev_info(&pdev->dev, "Initializing device %x:%x.\n",
398 		 (u32)pdev->vendor, (u32)pdev->device);
399 
400 	/* Assign octeon_device for this device to the private data area. */
401 	pci_set_drvdata(pdev, oct_dev);
402 
403 	/* set linux specific device pointer */
404 	oct_dev->pci_dev = pdev;
405 
406 	oct_dev->subsystem_id = pdev->subsystem_vendor |
407 		(pdev->subsystem_device << 16);
408 
409 	if (octeon_device_init(oct_dev)) {
410 		liquidio_vf_remove(pdev);
411 		return -ENOMEM;
412 	}
413 
414 	dev_dbg(&oct_dev->pci_dev->dev, "Device is ready\n");
415 
416 	return 0;
417 }
418 
419 /**
420  * \brief PCI FLR for each Octeon device.
421  * @param oct octeon device
422  */
423 static void octeon_pci_flr(struct octeon_device *oct)
424 {
425 	pci_save_state(oct->pci_dev);
426 
427 	pci_cfg_access_lock(oct->pci_dev);
428 
429 	/* Quiesce the device completely */
430 	pci_write_config_word(oct->pci_dev, PCI_COMMAND,
431 			      PCI_COMMAND_INTX_DISABLE);
432 
433 	pcie_flr(oct->pci_dev);
434 
435 	pci_cfg_access_unlock(oct->pci_dev);
436 
437 	pci_restore_state(oct->pci_dev);
438 }
439 
440 /**
441  *\brief Destroy resources associated with octeon device
442  * @param pdev PCI device structure
443  * @param ent unused
444  */
445 static void octeon_destroy_resources(struct octeon_device *oct)
446 {
447 	struct octeon_device_priv *oct_priv =
448 		(struct octeon_device_priv *)oct->priv;
449 	struct msix_entry *msix_entries;
450 	int i;
451 
452 	switch (atomic_read(&oct->status)) {
453 	case OCT_DEV_RUNNING:
454 	case OCT_DEV_CORE_OK:
455 		/* No more instructions will be forwarded. */
456 		atomic_set(&oct->status, OCT_DEV_IN_RESET);
457 
458 		oct->app_mode = CVM_DRV_INVALID_APP;
459 		dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
460 			lio_get_state_string(&oct->status));
461 
462 		schedule_timeout_uninterruptible(HZ / 10);
463 
464 		/* fallthrough */
465 	case OCT_DEV_HOST_OK:
466 		/* fallthrough */
467 	case OCT_DEV_IO_QUEUES_DONE:
468 		if (lio_wait_for_instr_fetch(oct))
469 			dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
470 
471 		if (wait_for_pending_requests(oct))
472 			dev_err(&oct->pci_dev->dev, "There were pending requests\n");
473 
474 		/* Disable the input and output queues now. No more packets will
475 		 * arrive from Octeon, but we should wait for all packet
476 		 * processing to finish.
477 		 */
478 		oct->fn_list.disable_io_queues(oct);
479 
480 		if (lio_wait_for_oq_pkts(oct))
481 			dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
482 
483 		/* Force all requests waiting to be fetched by OCTEON to
484 		 * complete.
485 		 */
486 		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
487 			struct octeon_instr_queue *iq;
488 
489 			if (!(oct->io_qmask.iq & BIT_ULL(i)))
490 				continue;
491 			iq = oct->instr_queue[i];
492 
493 			if (atomic_read(&iq->instr_pending)) {
494 				spin_lock_bh(&iq->lock);
495 				iq->fill_cnt = 0;
496 				iq->octeon_read_index = iq->host_write_index;
497 				iq->stats.instr_processed +=
498 					atomic_read(&iq->instr_pending);
499 				lio_process_iq_request_list(oct, iq, 0);
500 				spin_unlock_bh(&iq->lock);
501 			}
502 		}
503 
504 		lio_process_ordered_list(oct, 1);
505 		octeon_free_sc_done_list(oct);
506 		octeon_free_sc_zombie_list(oct);
507 
508 	/* fall through */
509 	case OCT_DEV_INTR_SET_DONE:
510 		/* Disable interrupts  */
511 		oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
512 
513 		if (oct->msix_on) {
514 			msix_entries = (struct msix_entry *)oct->msix_entries;
515 			for (i = 0; i < oct->num_msix_irqs; i++) {
516 				if (oct->ioq_vector[i].vector) {
517 					irq_set_affinity_hint(
518 							msix_entries[i].vector,
519 							NULL);
520 					free_irq(msix_entries[i].vector,
521 						 &oct->ioq_vector[i]);
522 					oct->ioq_vector[i].vector = 0;
523 				}
524 			}
525 			pci_disable_msix(oct->pci_dev);
526 			kfree(oct->msix_entries);
527 			oct->msix_entries = NULL;
528 			kfree(oct->irq_name_storage);
529 			oct->irq_name_storage = NULL;
530 		}
531 		/* Soft reset the octeon device before exiting */
532 		if (oct->pci_dev->reset_fn)
533 			octeon_pci_flr(oct);
534 		else
535 			cn23xx_vf_ask_pf_to_do_flr(oct);
536 
537 		/* fallthrough */
538 	case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
539 		octeon_free_ioq_vector(oct);
540 
541 		/* fallthrough */
542 	case OCT_DEV_MBOX_SETUP_DONE:
543 		oct->fn_list.free_mbox(oct);
544 
545 		/* fallthrough */
546 	case OCT_DEV_IN_RESET:
547 	case OCT_DEV_DROQ_INIT_DONE:
548 		mdelay(100);
549 		for (i = 0; i < MAX_OCTEON_OUTPUT_QUEUES(oct); i++) {
550 			if (!(oct->io_qmask.oq & BIT_ULL(i)))
551 				continue;
552 			octeon_delete_droq(oct, i);
553 		}
554 
555 		/* fallthrough */
556 	case OCT_DEV_RESP_LIST_INIT_DONE:
557 		octeon_delete_response_list(oct);
558 
559 		/* fallthrough */
560 	case OCT_DEV_INSTR_QUEUE_INIT_DONE:
561 		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
562 			if (!(oct->io_qmask.iq & BIT_ULL(i)))
563 				continue;
564 			octeon_delete_instr_queue(oct, i);
565 		}
566 
567 		/* fallthrough */
568 	case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
569 		octeon_free_sc_buffer_pool(oct);
570 
571 		/* fallthrough */
572 	case OCT_DEV_DISPATCH_INIT_DONE:
573 		octeon_delete_dispatch_list(oct);
574 		cancel_delayed_work_sync(&oct->nic_poll_work.work);
575 
576 		/* fallthrough */
577 	case OCT_DEV_PCI_MAP_DONE:
578 		octeon_unmap_pci_barx(oct, 0);
579 		octeon_unmap_pci_barx(oct, 1);
580 
581 		/* fallthrough */
582 	case OCT_DEV_PCI_ENABLE_DONE:
583 		pci_clear_master(oct->pci_dev);
584 		/* Disable the device, releasing the PCI INT */
585 		pci_disable_device(oct->pci_dev);
586 
587 		/* fallthrough */
588 	case OCT_DEV_BEGIN_STATE:
589 		/* Nothing to be done here either */
590 		break;
591 	}
592 
593 	tasklet_kill(&oct_priv->droq_tasklet);
594 }
595 
596 /**
597  * \brief Send Rx control command
598  * @param lio per-network private data
599  * @param start_stop whether to start or stop
600  */
601 static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
602 {
603 	struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
604 	struct octeon_soft_command *sc;
605 	union octnet_cmd *ncmd;
606 	int retval;
607 
608 	if (oct->props[lio->ifidx].rx_on == start_stop)
609 		return;
610 
611 	sc = (struct octeon_soft_command *)
612 		octeon_alloc_soft_command(oct, OCTNET_CMD_SIZE,
613 					  16, 0);
614 
615 	ncmd = (union octnet_cmd *)sc->virtdptr;
616 
617 	ncmd->u64 = 0;
618 	ncmd->s.cmd = OCTNET_CMD_RX_CTL;
619 	ncmd->s.param1 = start_stop;
620 
621 	octeon_swap_8B_data((u64 *)ncmd, (OCTNET_CMD_SIZE >> 3));
622 
623 	sc->iq_no = lio->linfo.txpciq[0].s.q_no;
624 
625 	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
626 				    OPCODE_NIC_CMD, 0, 0, 0);
627 
628 	init_completion(&sc->complete);
629 	sc->sc_status = OCTEON_REQUEST_PENDING;
630 
631 	retval = octeon_send_soft_command(oct, sc);
632 	if (retval == IQ_SEND_FAILED) {
633 		netif_info(lio, rx_err, lio->netdev, "Failed to send RX Control message\n");
634 		octeon_free_soft_command(oct, sc);
635 	} else {
636 		/* Sleep on a wait queue till the cond flag indicates that the
637 		 * response arrived or timed-out.
638 		 */
639 		retval = wait_for_sc_completion_timeout(oct, sc, 0);
640 		if (retval)
641 			return;
642 
643 		oct->props[lio->ifidx].rx_on = start_stop;
644 		WRITE_ONCE(sc->caller_is_done, true);
645 	}
646 }
647 
648 /**
649  * \brief Destroy NIC device interface
650  * @param oct octeon device
651  * @param ifidx which interface to destroy
652  *
653  * Cleanup associated with each interface for an Octeon device  when NIC
654  * module is being unloaded or if initialization fails during load.
655  */
656 static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
657 {
658 	struct net_device *netdev = oct->props[ifidx].netdev;
659 	struct octeon_device_priv *oct_priv =
660 		(struct octeon_device_priv *)oct->priv;
661 	struct napi_struct *napi, *n;
662 	struct lio *lio;
663 
664 	if (!netdev) {
665 		dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
666 			__func__, ifidx);
667 		return;
668 	}
669 
670 	lio = GET_LIO(netdev);
671 
672 	dev_dbg(&oct->pci_dev->dev, "NIC device cleanup\n");
673 
674 	if (atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING)
675 		liquidio_stop(netdev);
676 
677 	if (oct->props[lio->ifidx].napi_enabled == 1) {
678 		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
679 			napi_disable(napi);
680 
681 		oct->props[lio->ifidx].napi_enabled = 0;
682 
683 		oct->droq[0]->ops.poll_mode = 0;
684 	}
685 
686 	/* Delete NAPI */
687 	list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
688 		netif_napi_del(napi);
689 
690 	tasklet_enable(&oct_priv->droq_tasklet);
691 
692 	if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
693 		unregister_netdev(netdev);
694 
695 	cleanup_rx_oom_poll_fn(netdev);
696 
697 	cleanup_link_status_change_wq(netdev);
698 
699 	lio_delete_glists(lio);
700 
701 	free_netdev(netdev);
702 
703 	oct->props[ifidx].gmxport = -1;
704 
705 	oct->props[ifidx].netdev = NULL;
706 }
707 
708 /**
709  * \brief Stop complete NIC functionality
710  * @param oct octeon device
711  */
712 static int liquidio_stop_nic_module(struct octeon_device *oct)
713 {
714 	struct lio *lio;
715 	int i, j;
716 
717 	dev_dbg(&oct->pci_dev->dev, "Stopping network interfaces\n");
718 	if (!oct->ifcount) {
719 		dev_err(&oct->pci_dev->dev, "Init for Octeon was not completed\n");
720 		return 1;
721 	}
722 
723 	spin_lock_bh(&oct->cmd_resp_wqlock);
724 	oct->cmd_resp_state = OCT_DRV_OFFLINE;
725 	spin_unlock_bh(&oct->cmd_resp_wqlock);
726 
727 	for (i = 0; i < oct->ifcount; i++) {
728 		lio = GET_LIO(oct->props[i].netdev);
729 		for (j = 0; j < oct->num_oqs; j++)
730 			octeon_unregister_droq_ops(oct,
731 						   lio->linfo.rxpciq[j].s.q_no);
732 	}
733 
734 	for (i = 0; i < oct->ifcount; i++)
735 		liquidio_destroy_nic_device(oct, i);
736 
737 	dev_dbg(&oct->pci_dev->dev, "Network interfaces stopped\n");
738 	return 0;
739 }
740 
741 /**
742  * \brief Cleans up resources at unload time
743  * @param pdev PCI device structure
744  */
745 static void liquidio_vf_remove(struct pci_dev *pdev)
746 {
747 	struct octeon_device *oct_dev = pci_get_drvdata(pdev);
748 
749 	dev_dbg(&oct_dev->pci_dev->dev, "Stopping device\n");
750 
751 	if (oct_dev->app_mode == CVM_DRV_NIC_APP)
752 		liquidio_stop_nic_module(oct_dev);
753 
754 	/* Reset the octeon device and cleanup all memory allocated for
755 	 * the octeon device by driver.
756 	 */
757 	octeon_destroy_resources(oct_dev);
758 
759 	dev_info(&oct_dev->pci_dev->dev, "Device removed\n");
760 
761 	/* This octeon device has been removed. Update the global
762 	 * data structure to reflect this. Free the device structure.
763 	 */
764 	octeon_free_device_mem(oct_dev);
765 }
766 
767 /**
768  * \brief PCI initialization for each Octeon device.
769  * @param oct octeon device
770  */
771 static int octeon_pci_os_setup(struct octeon_device *oct)
772 {
773 #ifdef CONFIG_PCI_IOV
774 	/* setup PCI stuff first */
775 	if (!oct->pci_dev->physfn)
776 		octeon_pci_flr(oct);
777 #endif
778 
779 	if (pci_enable_device(oct->pci_dev)) {
780 		dev_err(&oct->pci_dev->dev, "pci_enable_device failed\n");
781 		return 1;
782 	}
783 
784 	if (dma_set_mask_and_coherent(&oct->pci_dev->dev, DMA_BIT_MASK(64))) {
785 		dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
786 		pci_disable_device(oct->pci_dev);
787 		return 1;
788 	}
789 
790 	/* Enable PCI DMA Master. */
791 	pci_set_master(oct->pci_dev);
792 
793 	return 0;
794 }
795 
796 /**
797  * \brief Unmap and free network buffer
798  * @param buf buffer
799  */
800 static void free_netbuf(void *buf)
801 {
802 	struct octnet_buf_free_info *finfo;
803 	struct sk_buff *skb;
804 	struct lio *lio;
805 
806 	finfo = (struct octnet_buf_free_info *)buf;
807 	skb = finfo->skb;
808 	lio = finfo->lio;
809 
810 	dma_unmap_single(&lio->oct_dev->pci_dev->dev, finfo->dptr, skb->len,
811 			 DMA_TO_DEVICE);
812 
813 	tx_buffer_free(skb);
814 }
815 
816 /**
817  * \brief Unmap and free gather buffer
818  * @param buf buffer
819  */
820 static void free_netsgbuf(void *buf)
821 {
822 	struct octnet_buf_free_info *finfo;
823 	struct octnic_gather *g;
824 	struct sk_buff *skb;
825 	int i, frags, iq;
826 	struct lio *lio;
827 
828 	finfo = (struct octnet_buf_free_info *)buf;
829 	skb = finfo->skb;
830 	lio = finfo->lio;
831 	g = finfo->g;
832 	frags = skb_shinfo(skb)->nr_frags;
833 
834 	dma_unmap_single(&lio->oct_dev->pci_dev->dev,
835 			 g->sg[0].ptr[0], (skb->len - skb->data_len),
836 			 DMA_TO_DEVICE);
837 
838 	i = 1;
839 	while (frags--) {
840 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
841 
842 		pci_unmap_page((lio->oct_dev)->pci_dev,
843 			       g->sg[(i >> 2)].ptr[(i & 3)],
844 			       skb_frag_size(frag), DMA_TO_DEVICE);
845 		i++;
846 	}
847 
848 	iq = skb_iq(lio->oct_dev, skb);
849 
850 	spin_lock(&lio->glist_lock[iq]);
851 	list_add_tail(&g->list, &lio->glist[iq]);
852 	spin_unlock(&lio->glist_lock[iq]);
853 
854 	tx_buffer_free(skb);
855 }
856 
857 /**
858  * \brief Unmap and free gather buffer with response
859  * @param buf buffer
860  */
861 static void free_netsgbuf_with_resp(void *buf)
862 {
863 	struct octnet_buf_free_info *finfo;
864 	struct octeon_soft_command *sc;
865 	struct octnic_gather *g;
866 	struct sk_buff *skb;
867 	int i, frags, iq;
868 	struct lio *lio;
869 
870 	sc = (struct octeon_soft_command *)buf;
871 	skb = (struct sk_buff *)sc->callback_arg;
872 	finfo = (struct octnet_buf_free_info *)&skb->cb;
873 
874 	lio = finfo->lio;
875 	g = finfo->g;
876 	frags = skb_shinfo(skb)->nr_frags;
877 
878 	dma_unmap_single(&lio->oct_dev->pci_dev->dev,
879 			 g->sg[0].ptr[0], (skb->len - skb->data_len),
880 			 DMA_TO_DEVICE);
881 
882 	i = 1;
883 	while (frags--) {
884 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
885 
886 		pci_unmap_page((lio->oct_dev)->pci_dev,
887 			       g->sg[(i >> 2)].ptr[(i & 3)],
888 			       skb_frag_size(frag), DMA_TO_DEVICE);
889 		i++;
890 	}
891 
892 	iq = skb_iq(lio->oct_dev, skb);
893 
894 	spin_lock(&lio->glist_lock[iq]);
895 	list_add_tail(&g->list, &lio->glist[iq]);
896 	spin_unlock(&lio->glist_lock[iq]);
897 
898 	/* Don't free the skb yet */
899 }
900 
901 /**
902  * \brief Net device open for LiquidIO
903  * @param netdev network device
904  */
905 static int liquidio_open(struct net_device *netdev)
906 {
907 	struct lio *lio = GET_LIO(netdev);
908 	struct octeon_device *oct = lio->oct_dev;
909 	struct octeon_device_priv *oct_priv =
910 		(struct octeon_device_priv *)oct->priv;
911 	struct napi_struct *napi, *n;
912 
913 	if (!oct->props[lio->ifidx].napi_enabled) {
914 		tasklet_disable(&oct_priv->droq_tasklet);
915 
916 		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
917 			napi_enable(napi);
918 
919 		oct->props[lio->ifidx].napi_enabled = 1;
920 
921 		oct->droq[0]->ops.poll_mode = 1;
922 	}
923 
924 	ifstate_set(lio, LIO_IFSTATE_RUNNING);
925 
926 	/* Ready for link status updates */
927 	lio->intf_open = 1;
928 
929 	netif_info(lio, ifup, lio->netdev, "Interface Open, ready for traffic\n");
930 	start_txqs(netdev);
931 
932 	INIT_DELAYED_WORK(&lio->stats_wk.work, lio_fetch_stats);
933 	lio->stats_wk.ctxptr = lio;
934 	schedule_delayed_work(&lio->stats_wk.work, msecs_to_jiffies
935 					(LIQUIDIO_NDEV_STATS_POLL_TIME_MS));
936 
937 	/* tell Octeon to start forwarding packets to host */
938 	send_rx_ctrl_cmd(lio, 1);
939 
940 	dev_info(&oct->pci_dev->dev, "%s interface is opened\n", netdev->name);
941 
942 	return 0;
943 }
944 
945 /**
946  * \brief Net device stop for LiquidIO
947  * @param netdev network device
948  */
949 static int liquidio_stop(struct net_device *netdev)
950 {
951 	struct lio *lio = GET_LIO(netdev);
952 	struct octeon_device *oct = lio->oct_dev;
953 	struct octeon_device_priv *oct_priv =
954 		(struct octeon_device_priv *)oct->priv;
955 	struct napi_struct *napi, *n;
956 
957 	/* tell Octeon to stop forwarding packets to host */
958 	send_rx_ctrl_cmd(lio, 0);
959 
960 	netif_info(lio, ifdown, lio->netdev, "Stopping interface!\n");
961 	/* Inform that netif carrier is down */
962 	lio->intf_open = 0;
963 	lio->linfo.link.s.link_up = 0;
964 
965 	netif_carrier_off(netdev);
966 	lio->link_changes++;
967 
968 	ifstate_reset(lio, LIO_IFSTATE_RUNNING);
969 
970 	stop_txqs(netdev);
971 
972 	/* Wait for any pending Rx descriptors */
973 	if (lio_wait_for_clean_oq(oct))
974 		netif_info(lio, rx_err, lio->netdev,
975 			   "Proceeding with stop interface after partial RX desc processing\n");
976 
977 	if (oct->props[lio->ifidx].napi_enabled == 1) {
978 		list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
979 			napi_disable(napi);
980 
981 		oct->props[lio->ifidx].napi_enabled = 0;
982 
983 		oct->droq[0]->ops.poll_mode = 0;
984 
985 		tasklet_enable(&oct_priv->droq_tasklet);
986 	}
987 
988 	cancel_delayed_work_sync(&lio->stats_wk.work);
989 
990 	dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
991 
992 	return 0;
993 }
994 
995 /**
996  * \brief Converts a mask based on net device flags
997  * @param netdev network device
998  *
999  * This routine generates a octnet_ifflags mask from the net device flags
1000  * received from the OS.
1001  */
1002 static enum octnet_ifflags get_new_flags(struct net_device *netdev)
1003 {
1004 	enum octnet_ifflags f = OCTNET_IFFLAG_UNICAST;
1005 
1006 	if (netdev->flags & IFF_PROMISC)
1007 		f |= OCTNET_IFFLAG_PROMISC;
1008 
1009 	if (netdev->flags & IFF_ALLMULTI)
1010 		f |= OCTNET_IFFLAG_ALLMULTI;
1011 
1012 	if (netdev->flags & IFF_MULTICAST) {
1013 		f |= OCTNET_IFFLAG_MULTICAST;
1014 
1015 		/* Accept all multicast addresses if there are more than we
1016 		 * can handle
1017 		 */
1018 		if (netdev_mc_count(netdev) > MAX_OCTEON_MULTICAST_ADDR)
1019 			f |= OCTNET_IFFLAG_ALLMULTI;
1020 	}
1021 
1022 	if (netdev->flags & IFF_BROADCAST)
1023 		f |= OCTNET_IFFLAG_BROADCAST;
1024 
1025 	return f;
1026 }
1027 
1028 static void liquidio_set_uc_list(struct net_device *netdev)
1029 {
1030 	struct lio *lio = GET_LIO(netdev);
1031 	struct octeon_device *oct = lio->oct_dev;
1032 	struct octnic_ctrl_pkt nctrl;
1033 	struct netdev_hw_addr *ha;
1034 	u64 *mac;
1035 
1036 	if (lio->netdev_uc_count == netdev_uc_count(netdev))
1037 		return;
1038 
1039 	if (netdev_uc_count(netdev) > MAX_NCTRL_UDD) {
1040 		dev_err(&oct->pci_dev->dev, "too many MAC addresses in netdev uc list\n");
1041 		return;
1042 	}
1043 
1044 	lio->netdev_uc_count = netdev_uc_count(netdev);
1045 
1046 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1047 	nctrl.ncmd.s.cmd = OCTNET_CMD_SET_UC_LIST;
1048 	nctrl.ncmd.s.more = lio->netdev_uc_count;
1049 	nctrl.ncmd.s.param1 = oct->vf_num;
1050 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1051 	nctrl.netpndev = (u64)netdev;
1052 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1053 
1054 	/* copy all the addresses into the udd */
1055 	mac = &nctrl.udd[0];
1056 	netdev_for_each_uc_addr(ha, netdev) {
1057 		ether_addr_copy(((u8 *)mac) + 2, ha->addr);
1058 		mac++;
1059 	}
1060 
1061 	octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1062 }
1063 
1064 /**
1065  * \brief Net device set_multicast_list
1066  * @param netdev network device
1067  */
1068 static void liquidio_set_mcast_list(struct net_device *netdev)
1069 {
1070 	int mc_count = min(netdev_mc_count(netdev), MAX_OCTEON_MULTICAST_ADDR);
1071 	struct lio *lio = GET_LIO(netdev);
1072 	struct octeon_device *oct = lio->oct_dev;
1073 	struct octnic_ctrl_pkt nctrl;
1074 	struct netdev_hw_addr *ha;
1075 	u64 *mc;
1076 	int ret;
1077 
1078 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1079 
1080 	/* Create a ctrl pkt command to be sent to core app. */
1081 	nctrl.ncmd.u64 = 0;
1082 	nctrl.ncmd.s.cmd = OCTNET_CMD_SET_MULTI_LIST;
1083 	nctrl.ncmd.s.param1 = get_new_flags(netdev);
1084 	nctrl.ncmd.s.param2 = mc_count;
1085 	nctrl.ncmd.s.more = mc_count;
1086 	nctrl.netpndev = (u64)netdev;
1087 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1088 
1089 	/* copy all the addresses into the udd */
1090 	mc = &nctrl.udd[0];
1091 	netdev_for_each_mc_addr(ha, netdev) {
1092 		*mc = 0;
1093 		ether_addr_copy(((u8 *)mc) + 2, ha->addr);
1094 		/* no need to swap bytes */
1095 		if (++mc > &nctrl.udd[mc_count])
1096 			break;
1097 	}
1098 
1099 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1100 
1101 	/* Apparently, any activity in this call from the kernel has to
1102 	 * be atomic. So we won't wait for response.
1103 	 */
1104 
1105 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1106 	if (ret) {
1107 		dev_err(&oct->pci_dev->dev, "DEVFLAGS change failed in core (ret: 0x%x)\n",
1108 			ret);
1109 	}
1110 
1111 	liquidio_set_uc_list(netdev);
1112 }
1113 
1114 /**
1115  * \brief Net device set_mac_address
1116  * @param netdev network device
1117  */
1118 static int liquidio_set_mac(struct net_device *netdev, void *p)
1119 {
1120 	struct sockaddr *addr = (struct sockaddr *)p;
1121 	struct lio *lio = GET_LIO(netdev);
1122 	struct octeon_device *oct = lio->oct_dev;
1123 	struct octnic_ctrl_pkt nctrl;
1124 	int ret = 0;
1125 
1126 	if (!is_valid_ether_addr(addr->sa_data))
1127 		return -EADDRNOTAVAIL;
1128 
1129 	if (ether_addr_equal(addr->sa_data, netdev->dev_addr))
1130 		return 0;
1131 
1132 	if (lio->linfo.macaddr_is_admin_asgnd)
1133 		return -EPERM;
1134 
1135 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1136 
1137 	nctrl.ncmd.u64 = 0;
1138 	nctrl.ncmd.s.cmd = OCTNET_CMD_CHANGE_MACADDR;
1139 	nctrl.ncmd.s.param1 = 0;
1140 	nctrl.ncmd.s.more = 1;
1141 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1142 	nctrl.netpndev = (u64)netdev;
1143 
1144 	nctrl.udd[0] = 0;
1145 	/* The MAC Address is presented in network byte order. */
1146 	ether_addr_copy((u8 *)&nctrl.udd[0] + 2, addr->sa_data);
1147 
1148 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1149 	if (ret < 0) {
1150 		dev_err(&oct->pci_dev->dev, "MAC Address change failed\n");
1151 		return -ENOMEM;
1152 	}
1153 
1154 	if (nctrl.sc_status ==
1155 	    FIRMWARE_STATUS_CODE(OCTEON_REQUEST_NO_PERMISSION)) {
1156 		dev_err(&oct->pci_dev->dev, "MAC Address change failed: no permission\n");
1157 		return -EPERM;
1158 	}
1159 
1160 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1161 	ether_addr_copy(((u8 *)&lio->linfo.hw_addr) + 2, addr->sa_data);
1162 
1163 	return 0;
1164 }
1165 
1166 static void
1167 liquidio_get_stats64(struct net_device *netdev,
1168 		     struct rtnl_link_stats64 *lstats)
1169 {
1170 	struct lio *lio = GET_LIO(netdev);
1171 	struct octeon_device *oct;
1172 	u64 pkts = 0, drop = 0, bytes = 0;
1173 	struct oct_droq_stats *oq_stats;
1174 	struct oct_iq_stats *iq_stats;
1175 	int i, iq_no, oq_no;
1176 
1177 	oct = lio->oct_dev;
1178 
1179 	if (ifstate_check(lio, LIO_IFSTATE_RESETTING))
1180 		return;
1181 
1182 	for (i = 0; i < oct->num_iqs; i++) {
1183 		iq_no = lio->linfo.txpciq[i].s.q_no;
1184 		iq_stats = &oct->instr_queue[iq_no]->stats;
1185 		pkts += iq_stats->tx_done;
1186 		drop += iq_stats->tx_dropped;
1187 		bytes += iq_stats->tx_tot_bytes;
1188 	}
1189 
1190 	lstats->tx_packets = pkts;
1191 	lstats->tx_bytes = bytes;
1192 	lstats->tx_dropped = drop;
1193 
1194 	pkts = 0;
1195 	drop = 0;
1196 	bytes = 0;
1197 
1198 	for (i = 0; i < oct->num_oqs; i++) {
1199 		oq_no = lio->linfo.rxpciq[i].s.q_no;
1200 		oq_stats = &oct->droq[oq_no]->stats;
1201 		pkts += oq_stats->rx_pkts_received;
1202 		drop += (oq_stats->rx_dropped +
1203 			 oq_stats->dropped_nodispatch +
1204 			 oq_stats->dropped_toomany +
1205 			 oq_stats->dropped_nomem);
1206 		bytes += oq_stats->rx_bytes_received;
1207 	}
1208 
1209 	lstats->rx_bytes = bytes;
1210 	lstats->rx_packets = pkts;
1211 	lstats->rx_dropped = drop;
1212 
1213 	lstats->multicast = oct->link_stats.fromwire.fw_total_mcast;
1214 
1215 	/* detailed rx_errors: */
1216 	lstats->rx_length_errors = oct->link_stats.fromwire.l2_err;
1217 	/* recved pkt with crc error */
1218 	lstats->rx_crc_errors = oct->link_stats.fromwire.fcs_err;
1219 	/* recv'd frame alignment error */
1220 	lstats->rx_frame_errors = oct->link_stats.fromwire.frame_err;
1221 
1222 	lstats->rx_errors = lstats->rx_length_errors + lstats->rx_crc_errors +
1223 			    lstats->rx_frame_errors;
1224 
1225 	/* detailed tx_errors */
1226 	lstats->tx_aborted_errors = oct->link_stats.fromhost.fw_err_pko;
1227 	lstats->tx_carrier_errors = oct->link_stats.fromhost.fw_err_link;
1228 
1229 	lstats->tx_errors = lstats->tx_aborted_errors +
1230 		lstats->tx_carrier_errors;
1231 }
1232 
1233 /**
1234  * \brief Handler for SIOCSHWTSTAMP ioctl
1235  * @param netdev network device
1236  * @param ifr interface request
1237  * @param cmd command
1238  */
1239 static int hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
1240 {
1241 	struct lio *lio = GET_LIO(netdev);
1242 	struct hwtstamp_config conf;
1243 
1244 	if (copy_from_user(&conf, ifr->ifr_data, sizeof(conf)))
1245 		return -EFAULT;
1246 
1247 	if (conf.flags)
1248 		return -EINVAL;
1249 
1250 	switch (conf.tx_type) {
1251 	case HWTSTAMP_TX_ON:
1252 	case HWTSTAMP_TX_OFF:
1253 		break;
1254 	default:
1255 		return -ERANGE;
1256 	}
1257 
1258 	switch (conf.rx_filter) {
1259 	case HWTSTAMP_FILTER_NONE:
1260 		break;
1261 	case HWTSTAMP_FILTER_ALL:
1262 	case HWTSTAMP_FILTER_SOME:
1263 	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1264 	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1265 	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1266 	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1267 	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1268 	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1269 	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1270 	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1271 	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1272 	case HWTSTAMP_FILTER_PTP_V2_EVENT:
1273 	case HWTSTAMP_FILTER_PTP_V2_SYNC:
1274 	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1275 	case HWTSTAMP_FILTER_NTP_ALL:
1276 		conf.rx_filter = HWTSTAMP_FILTER_ALL;
1277 		break;
1278 	default:
1279 		return -ERANGE;
1280 	}
1281 
1282 	if (conf.rx_filter == HWTSTAMP_FILTER_ALL)
1283 		ifstate_set(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1284 
1285 	else
1286 		ifstate_reset(lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED);
1287 
1288 	return copy_to_user(ifr->ifr_data, &conf, sizeof(conf)) ? -EFAULT : 0;
1289 }
1290 
1291 /**
1292  * \brief ioctl handler
1293  * @param netdev network device
1294  * @param ifr interface request
1295  * @param cmd command
1296  */
1297 static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1298 {
1299 	switch (cmd) {
1300 	case SIOCSHWTSTAMP:
1301 		return hwtstamp_ioctl(netdev, ifr);
1302 	default:
1303 		return -EOPNOTSUPP;
1304 	}
1305 }
1306 
1307 static void handle_timestamp(struct octeon_device *oct, u32 status, void *buf)
1308 {
1309 	struct sk_buff *skb = (struct sk_buff *)buf;
1310 	struct octnet_buf_free_info *finfo;
1311 	struct oct_timestamp_resp *resp;
1312 	struct octeon_soft_command *sc;
1313 	struct lio *lio;
1314 
1315 	finfo = (struct octnet_buf_free_info *)skb->cb;
1316 	lio = finfo->lio;
1317 	sc = finfo->sc;
1318 	oct = lio->oct_dev;
1319 	resp = (struct oct_timestamp_resp *)sc->virtrptr;
1320 
1321 	if (status != OCTEON_REQUEST_DONE) {
1322 		dev_err(&oct->pci_dev->dev, "Tx timestamp instruction failed. Status: %llx\n",
1323 			CVM_CAST64(status));
1324 		resp->timestamp = 0;
1325 	}
1326 
1327 	octeon_swap_8B_data(&resp->timestamp, 1);
1328 
1329 	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) {
1330 		struct skb_shared_hwtstamps ts;
1331 		u64 ns = resp->timestamp;
1332 
1333 		netif_info(lio, tx_done, lio->netdev,
1334 			   "Got resulting SKBTX_HW_TSTAMP skb=%p ns=%016llu\n",
1335 			   skb, (unsigned long long)ns);
1336 		ts.hwtstamp = ns_to_ktime(ns + lio->ptp_adjust);
1337 		skb_tstamp_tx(skb, &ts);
1338 	}
1339 
1340 	octeon_free_soft_command(oct, sc);
1341 	tx_buffer_free(skb);
1342 }
1343 
1344 /* \brief Send a data packet that will be timestamped
1345  * @param oct octeon device
1346  * @param ndata pointer to network data
1347  * @param finfo pointer to private network data
1348  */
1349 static int send_nic_timestamp_pkt(struct octeon_device *oct,
1350 				  struct octnic_data_pkt *ndata,
1351 				  struct octnet_buf_free_info *finfo,
1352 				  int xmit_more)
1353 {
1354 	struct octeon_soft_command *sc;
1355 	int ring_doorbell;
1356 	struct lio *lio;
1357 	int retval;
1358 	u32 len;
1359 
1360 	lio = finfo->lio;
1361 
1362 	sc = octeon_alloc_soft_command_resp(oct, &ndata->cmd,
1363 					    sizeof(struct oct_timestamp_resp));
1364 	finfo->sc = sc;
1365 
1366 	if (!sc) {
1367 		dev_err(&oct->pci_dev->dev, "No memory for timestamped data packet\n");
1368 		return IQ_SEND_FAILED;
1369 	}
1370 
1371 	if (ndata->reqtype == REQTYPE_NORESP_NET)
1372 		ndata->reqtype = REQTYPE_RESP_NET;
1373 	else if (ndata->reqtype == REQTYPE_NORESP_NET_SG)
1374 		ndata->reqtype = REQTYPE_RESP_NET_SG;
1375 
1376 	sc->callback = handle_timestamp;
1377 	sc->callback_arg = finfo->skb;
1378 	sc->iq_no = ndata->q_no;
1379 
1380 	len = (u32)((struct octeon_instr_ih3 *)(&sc->cmd.cmd3.ih3))->dlengsz;
1381 
1382 	ring_doorbell = !xmit_more;
1383 
1384 	retval = octeon_send_command(oct, sc->iq_no, ring_doorbell, &sc->cmd,
1385 				     sc, len, ndata->reqtype);
1386 
1387 	if (retval == IQ_SEND_FAILED) {
1388 		dev_err(&oct->pci_dev->dev, "timestamp data packet failed status: %x\n",
1389 			retval);
1390 		octeon_free_soft_command(oct, sc);
1391 	} else {
1392 		netif_info(lio, tx_queued, lio->netdev, "Queued timestamp packet\n");
1393 	}
1394 
1395 	return retval;
1396 }
1397 
1398 /** \brief Transmit networks packets to the Octeon interface
1399  * @param skbuff   skbuff struct to be passed to network layer.
1400  * @param netdev   pointer to network device
1401  * @returns whether the packet was transmitted to the device okay or not
1402  *             (NETDEV_TX_OK or NETDEV_TX_BUSY)
1403  */
1404 static netdev_tx_t liquidio_xmit(struct sk_buff *skb, struct net_device *netdev)
1405 {
1406 	struct octnet_buf_free_info *finfo;
1407 	union octnic_cmd_setup cmdsetup;
1408 	struct octnic_data_pkt ndata;
1409 	struct octeon_instr_irh *irh;
1410 	struct oct_iq_stats *stats;
1411 	struct octeon_device *oct;
1412 	int q_idx = 0, iq_no = 0;
1413 	union tx_info *tx_info;
1414 	int xmit_more = 0;
1415 	struct lio *lio;
1416 	int status = 0;
1417 	u64 dptr = 0;
1418 	u32 tag = 0;
1419 	int j;
1420 
1421 	lio = GET_LIO(netdev);
1422 	oct = lio->oct_dev;
1423 
1424 	q_idx = skb_iq(lio->oct_dev, skb);
1425 	tag = q_idx;
1426 	iq_no = lio->linfo.txpciq[q_idx].s.q_no;
1427 
1428 	stats = &oct->instr_queue[iq_no]->stats;
1429 
1430 	/* Check for all conditions in which the current packet cannot be
1431 	 * transmitted.
1432 	 */
1433 	if (!(atomic_read(&lio->ifstate) & LIO_IFSTATE_RUNNING) ||
1434 	    (!lio->linfo.link.s.link_up) || (skb->len <= 0)) {
1435 		netif_info(lio, tx_err, lio->netdev, "Transmit failed link_status : %d\n",
1436 			   lio->linfo.link.s.link_up);
1437 		goto lio_xmit_failed;
1438 	}
1439 
1440 	/* Use space in skb->cb to store info used to unmap and
1441 	 * free the buffers.
1442 	 */
1443 	finfo = (struct octnet_buf_free_info *)skb->cb;
1444 	finfo->lio = lio;
1445 	finfo->skb = skb;
1446 	finfo->sc = NULL;
1447 
1448 	/* Prepare the attributes for the data to be passed to OSI. */
1449 	memset(&ndata, 0, sizeof(struct octnic_data_pkt));
1450 
1451 	ndata.buf = finfo;
1452 
1453 	ndata.q_no = iq_no;
1454 
1455 	if (octnet_iq_is_full(oct, ndata.q_no)) {
1456 		/* defer sending if queue is full */
1457 		netif_info(lio, tx_err, lio->netdev, "Transmit failed iq:%d full\n",
1458 			   ndata.q_no);
1459 		stats->tx_iq_busy++;
1460 		return NETDEV_TX_BUSY;
1461 	}
1462 
1463 	ndata.datasize = skb->len;
1464 
1465 	cmdsetup.u64 = 0;
1466 	cmdsetup.s.iq_no = iq_no;
1467 
1468 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
1469 		if (skb->encapsulation) {
1470 			cmdsetup.s.tnl_csum = 1;
1471 			stats->tx_vxlan++;
1472 		} else {
1473 			cmdsetup.s.transport_csum = 1;
1474 		}
1475 	}
1476 	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
1477 		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1478 		cmdsetup.s.timestamp = 1;
1479 	}
1480 
1481 	if (!skb_shinfo(skb)->nr_frags) {
1482 		cmdsetup.s.u.datasize = skb->len;
1483 		octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1484 		/* Offload checksum calculation for TCP/UDP packets */
1485 		dptr = dma_map_single(&oct->pci_dev->dev,
1486 				      skb->data,
1487 				      skb->len,
1488 				      DMA_TO_DEVICE);
1489 		if (dma_mapping_error(&oct->pci_dev->dev, dptr)) {
1490 			dev_err(&oct->pci_dev->dev, "%s DMA mapping error 1\n",
1491 				__func__);
1492 			return NETDEV_TX_BUSY;
1493 		}
1494 
1495 		ndata.cmd.cmd3.dptr = dptr;
1496 		finfo->dptr = dptr;
1497 		ndata.reqtype = REQTYPE_NORESP_NET;
1498 
1499 	} else {
1500 		skb_frag_t *frag;
1501 		struct octnic_gather *g;
1502 		int i, frags;
1503 
1504 		spin_lock(&lio->glist_lock[q_idx]);
1505 		g = (struct octnic_gather *)
1506 			lio_list_delete_head(&lio->glist[q_idx]);
1507 		spin_unlock(&lio->glist_lock[q_idx]);
1508 
1509 		if (!g) {
1510 			netif_info(lio, tx_err, lio->netdev,
1511 				   "Transmit scatter gather: glist null!\n");
1512 			goto lio_xmit_failed;
1513 		}
1514 
1515 		cmdsetup.s.gather = 1;
1516 		cmdsetup.s.u.gatherptrs = (skb_shinfo(skb)->nr_frags + 1);
1517 		octnet_prepare_pci_cmd(oct, &ndata.cmd, &cmdsetup, tag);
1518 
1519 		memset(g->sg, 0, g->sg_size);
1520 
1521 		g->sg[0].ptr[0] = dma_map_single(&oct->pci_dev->dev,
1522 						 skb->data,
1523 						 (skb->len - skb->data_len),
1524 						 DMA_TO_DEVICE);
1525 		if (dma_mapping_error(&oct->pci_dev->dev, g->sg[0].ptr[0])) {
1526 			dev_err(&oct->pci_dev->dev, "%s DMA mapping error 2\n",
1527 				__func__);
1528 			return NETDEV_TX_BUSY;
1529 		}
1530 		add_sg_size(&g->sg[0], (skb->len - skb->data_len), 0);
1531 
1532 		frags = skb_shinfo(skb)->nr_frags;
1533 		i = 1;
1534 		while (frags--) {
1535 			frag = &skb_shinfo(skb)->frags[i - 1];
1536 
1537 			g->sg[(i >> 2)].ptr[(i & 3)] =
1538 				skb_frag_dma_map(&oct->pci_dev->dev,
1539 						 frag, 0, skb_frag_size(frag),
1540 						 DMA_TO_DEVICE);
1541 			if (dma_mapping_error(&oct->pci_dev->dev,
1542 					      g->sg[i >> 2].ptr[i & 3])) {
1543 				dma_unmap_single(&oct->pci_dev->dev,
1544 						 g->sg[0].ptr[0],
1545 						 skb->len - skb->data_len,
1546 						 DMA_TO_DEVICE);
1547 				for (j = 1; j < i; j++) {
1548 					frag = &skb_shinfo(skb)->frags[j - 1];
1549 					dma_unmap_page(&oct->pci_dev->dev,
1550 						       g->sg[j >> 2].ptr[j & 3],
1551 						       skb_frag_size(frag),
1552 						       DMA_TO_DEVICE);
1553 				}
1554 				dev_err(&oct->pci_dev->dev, "%s DMA mapping error 3\n",
1555 					__func__);
1556 				return NETDEV_TX_BUSY;
1557 			}
1558 
1559 			add_sg_size(&g->sg[(i >> 2)], skb_frag_size(frag),
1560 				    (i & 3));
1561 			i++;
1562 		}
1563 
1564 		dptr = g->sg_dma_ptr;
1565 
1566 		ndata.cmd.cmd3.dptr = dptr;
1567 		finfo->dptr = dptr;
1568 		finfo->g = g;
1569 
1570 		ndata.reqtype = REQTYPE_NORESP_NET_SG;
1571 	}
1572 
1573 	irh = (struct octeon_instr_irh *)&ndata.cmd.cmd3.irh;
1574 	tx_info = (union tx_info *)&ndata.cmd.cmd3.ossp[0];
1575 
1576 	if (skb_shinfo(skb)->gso_size) {
1577 		tx_info->s.gso_size = skb_shinfo(skb)->gso_size;
1578 		tx_info->s.gso_segs = skb_shinfo(skb)->gso_segs;
1579 	}
1580 
1581 	/* HW insert VLAN tag */
1582 	if (skb_vlan_tag_present(skb)) {
1583 		irh->priority = skb_vlan_tag_get(skb) >> VLAN_PRIO_SHIFT;
1584 		irh->vlan = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
1585 	}
1586 
1587 	xmit_more = netdev_xmit_more();
1588 
1589 	if (unlikely(cmdsetup.s.timestamp))
1590 		status = send_nic_timestamp_pkt(oct, &ndata, finfo, xmit_more);
1591 	else
1592 		status = octnet_send_nic_data_pkt(oct, &ndata, xmit_more);
1593 	if (status == IQ_SEND_FAILED)
1594 		goto lio_xmit_failed;
1595 
1596 	netif_info(lio, tx_queued, lio->netdev, "Transmit queued successfully\n");
1597 
1598 	if (status == IQ_SEND_STOP) {
1599 		dev_err(&oct->pci_dev->dev, "Rcvd IQ_SEND_STOP signal; stopping IQ-%d\n",
1600 			iq_no);
1601 		netif_stop_subqueue(netdev, q_idx);
1602 	}
1603 
1604 	netif_trans_update(netdev);
1605 
1606 	if (tx_info->s.gso_segs)
1607 		stats->tx_done += tx_info->s.gso_segs;
1608 	else
1609 		stats->tx_done++;
1610 	stats->tx_tot_bytes += ndata.datasize;
1611 
1612 	return NETDEV_TX_OK;
1613 
1614 lio_xmit_failed:
1615 	stats->tx_dropped++;
1616 	netif_info(lio, tx_err, lio->netdev, "IQ%d Transmit dropped:%llu\n",
1617 		   iq_no, stats->tx_dropped);
1618 	if (dptr)
1619 		dma_unmap_single(&oct->pci_dev->dev, dptr,
1620 				 ndata.datasize, DMA_TO_DEVICE);
1621 
1622 	octeon_ring_doorbell_locked(oct, iq_no);
1623 
1624 	tx_buffer_free(skb);
1625 	return NETDEV_TX_OK;
1626 }
1627 
1628 /** \brief Network device Tx timeout
1629  * @param netdev    pointer to network device
1630  */
1631 static void liquidio_tx_timeout(struct net_device *netdev)
1632 {
1633 	struct lio *lio;
1634 
1635 	lio = GET_LIO(netdev);
1636 
1637 	netif_info(lio, tx_err, lio->netdev,
1638 		   "Transmit timeout tx_dropped:%ld, waking up queues now!!\n",
1639 		   netdev->stats.tx_dropped);
1640 	netif_trans_update(netdev);
1641 	wake_txqs(netdev);
1642 }
1643 
1644 static int
1645 liquidio_vlan_rx_add_vid(struct net_device *netdev,
1646 			 __be16 proto __attribute__((unused)), u16 vid)
1647 {
1648 	struct lio *lio = GET_LIO(netdev);
1649 	struct octeon_device *oct = lio->oct_dev;
1650 	struct octnic_ctrl_pkt nctrl;
1651 	int ret = 0;
1652 
1653 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1654 
1655 	nctrl.ncmd.u64 = 0;
1656 	nctrl.ncmd.s.cmd = OCTNET_CMD_ADD_VLAN_FILTER;
1657 	nctrl.ncmd.s.param1 = vid;
1658 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1659 	nctrl.netpndev = (u64)netdev;
1660 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1661 
1662 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1663 	if (ret) {
1664 		dev_err(&oct->pci_dev->dev, "Add VLAN filter failed in core (ret: 0x%x)\n",
1665 			ret);
1666 		return -EPERM;
1667 	}
1668 
1669 	return 0;
1670 }
1671 
1672 static int
1673 liquidio_vlan_rx_kill_vid(struct net_device *netdev,
1674 			  __be16 proto __attribute__((unused)), u16 vid)
1675 {
1676 	struct lio *lio = GET_LIO(netdev);
1677 	struct octeon_device *oct = lio->oct_dev;
1678 	struct octnic_ctrl_pkt nctrl;
1679 	int ret = 0;
1680 
1681 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1682 
1683 	nctrl.ncmd.u64 = 0;
1684 	nctrl.ncmd.s.cmd = OCTNET_CMD_DEL_VLAN_FILTER;
1685 	nctrl.ncmd.s.param1 = vid;
1686 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1687 	nctrl.netpndev = (u64)netdev;
1688 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1689 
1690 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1691 	if (ret) {
1692 		dev_err(&oct->pci_dev->dev, "Del VLAN filter failed in core (ret: 0x%x)\n",
1693 			ret);
1694 		if (ret > 0)
1695 			ret = -EIO;
1696 	}
1697 	return ret;
1698 }
1699 
1700 /** Sending command to enable/disable RX checksum offload
1701  * @param netdev                pointer to network device
1702  * @param command               OCTNET_CMD_TNL_RX_CSUM_CTL
1703  * @param rx_cmd_bit            OCTNET_CMD_RXCSUM_ENABLE/
1704  *                              OCTNET_CMD_RXCSUM_DISABLE
1705  * @returns                     SUCCESS or FAILURE
1706  */
1707 static int liquidio_set_rxcsum_command(struct net_device *netdev, int command,
1708 				       u8 rx_cmd)
1709 {
1710 	struct lio *lio = GET_LIO(netdev);
1711 	struct octeon_device *oct = lio->oct_dev;
1712 	struct octnic_ctrl_pkt nctrl;
1713 	int ret = 0;
1714 
1715 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1716 
1717 	nctrl.ncmd.u64 = 0;
1718 	nctrl.ncmd.s.cmd = command;
1719 	nctrl.ncmd.s.param1 = rx_cmd;
1720 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1721 	nctrl.netpndev = (u64)netdev;
1722 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1723 
1724 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1725 	if (ret) {
1726 		dev_err(&oct->pci_dev->dev, "DEVFLAGS RXCSUM change failed in core (ret:0x%x)\n",
1727 			ret);
1728 		if (ret > 0)
1729 			ret = -EIO;
1730 	}
1731 	return ret;
1732 }
1733 
1734 /** Sending command to add/delete VxLAN UDP port to firmware
1735  * @param netdev                pointer to network device
1736  * @param command               OCTNET_CMD_VXLAN_PORT_CONFIG
1737  * @param vxlan_port            VxLAN port to be added or deleted
1738  * @param vxlan_cmd_bit         OCTNET_CMD_VXLAN_PORT_ADD,
1739  *                              OCTNET_CMD_VXLAN_PORT_DEL
1740  * @returns                     SUCCESS or FAILURE
1741  */
1742 static int liquidio_vxlan_port_command(struct net_device *netdev, int command,
1743 				       u16 vxlan_port, u8 vxlan_cmd_bit)
1744 {
1745 	struct lio *lio = GET_LIO(netdev);
1746 	struct octeon_device *oct = lio->oct_dev;
1747 	struct octnic_ctrl_pkt nctrl;
1748 	int ret = 0;
1749 
1750 	memset(&nctrl, 0, sizeof(struct octnic_ctrl_pkt));
1751 
1752 	nctrl.ncmd.u64 = 0;
1753 	nctrl.ncmd.s.cmd = command;
1754 	nctrl.ncmd.s.more = vxlan_cmd_bit;
1755 	nctrl.ncmd.s.param1 = vxlan_port;
1756 	nctrl.iq_no = lio->linfo.txpciq[0].s.q_no;
1757 	nctrl.netpndev = (u64)netdev;
1758 	nctrl.cb_fn = liquidio_link_ctrl_cmd_completion;
1759 
1760 	ret = octnet_send_nic_ctrl_pkt(lio->oct_dev, &nctrl);
1761 	if (ret) {
1762 		dev_err(&oct->pci_dev->dev,
1763 			"DEVFLAGS VxLAN port add/delete failed in core (ret : 0x%x)\n",
1764 			ret);
1765 		if (ret > 0)
1766 			ret = -EIO;
1767 	}
1768 	return ret;
1769 }
1770 
1771 /** \brief Net device fix features
1772  * @param netdev  pointer to network device
1773  * @param request features requested
1774  * @returns updated features list
1775  */
1776 static netdev_features_t liquidio_fix_features(struct net_device *netdev,
1777 					       netdev_features_t request)
1778 {
1779 	struct lio *lio = netdev_priv(netdev);
1780 
1781 	if ((request & NETIF_F_RXCSUM) &&
1782 	    !(lio->dev_capability & NETIF_F_RXCSUM))
1783 		request &= ~NETIF_F_RXCSUM;
1784 
1785 	if ((request & NETIF_F_HW_CSUM) &&
1786 	    !(lio->dev_capability & NETIF_F_HW_CSUM))
1787 		request &= ~NETIF_F_HW_CSUM;
1788 
1789 	if ((request & NETIF_F_TSO) && !(lio->dev_capability & NETIF_F_TSO))
1790 		request &= ~NETIF_F_TSO;
1791 
1792 	if ((request & NETIF_F_TSO6) && !(lio->dev_capability & NETIF_F_TSO6))
1793 		request &= ~NETIF_F_TSO6;
1794 
1795 	if ((request & NETIF_F_LRO) && !(lio->dev_capability & NETIF_F_LRO))
1796 		request &= ~NETIF_F_LRO;
1797 
1798 	/* Disable LRO if RXCSUM is off */
1799 	if (!(request & NETIF_F_RXCSUM) && (netdev->features & NETIF_F_LRO) &&
1800 	    (lio->dev_capability & NETIF_F_LRO))
1801 		request &= ~NETIF_F_LRO;
1802 
1803 	return request;
1804 }
1805 
1806 /** \brief Net device set features
1807  * @param netdev  pointer to network device
1808  * @param features features to enable/disable
1809  */
1810 static int liquidio_set_features(struct net_device *netdev,
1811 				 netdev_features_t features)
1812 {
1813 	struct lio *lio = netdev_priv(netdev);
1814 
1815 	if (!((netdev->features ^ features) & NETIF_F_LRO))
1816 		return 0;
1817 
1818 	if ((features & NETIF_F_LRO) && (lio->dev_capability & NETIF_F_LRO))
1819 		liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
1820 				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1821 	else if (!(features & NETIF_F_LRO) &&
1822 		 (lio->dev_capability & NETIF_F_LRO))
1823 		liquidio_set_feature(netdev, OCTNET_CMD_LRO_DISABLE,
1824 				     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
1825 	if (!(netdev->features & NETIF_F_RXCSUM) &&
1826 	    (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1827 	    (features & NETIF_F_RXCSUM))
1828 		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1829 					    OCTNET_CMD_RXCSUM_ENABLE);
1830 	else if ((netdev->features & NETIF_F_RXCSUM) &&
1831 		 (lio->enc_dev_capability & NETIF_F_RXCSUM) &&
1832 		 !(features & NETIF_F_RXCSUM))
1833 		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
1834 					    OCTNET_CMD_RXCSUM_DISABLE);
1835 
1836 	return 0;
1837 }
1838 
1839 static void liquidio_add_vxlan_port(struct net_device *netdev,
1840 				    struct udp_tunnel_info *ti)
1841 {
1842 	if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1843 		return;
1844 
1845 	liquidio_vxlan_port_command(netdev,
1846 				    OCTNET_CMD_VXLAN_PORT_CONFIG,
1847 				    htons(ti->port),
1848 				    OCTNET_CMD_VXLAN_PORT_ADD);
1849 }
1850 
1851 static void liquidio_del_vxlan_port(struct net_device *netdev,
1852 				    struct udp_tunnel_info *ti)
1853 {
1854 	if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
1855 		return;
1856 
1857 	liquidio_vxlan_port_command(netdev,
1858 				    OCTNET_CMD_VXLAN_PORT_CONFIG,
1859 				    htons(ti->port),
1860 				    OCTNET_CMD_VXLAN_PORT_DEL);
1861 }
1862 
1863 static const struct net_device_ops lionetdevops = {
1864 	.ndo_open		= liquidio_open,
1865 	.ndo_stop		= liquidio_stop,
1866 	.ndo_start_xmit		= liquidio_xmit,
1867 	.ndo_get_stats64	= liquidio_get_stats64,
1868 	.ndo_set_mac_address	= liquidio_set_mac,
1869 	.ndo_set_rx_mode	= liquidio_set_mcast_list,
1870 	.ndo_tx_timeout		= liquidio_tx_timeout,
1871 	.ndo_vlan_rx_add_vid    = liquidio_vlan_rx_add_vid,
1872 	.ndo_vlan_rx_kill_vid   = liquidio_vlan_rx_kill_vid,
1873 	.ndo_change_mtu		= liquidio_change_mtu,
1874 	.ndo_do_ioctl		= liquidio_ioctl,
1875 	.ndo_fix_features	= liquidio_fix_features,
1876 	.ndo_set_features	= liquidio_set_features,
1877 	.ndo_udp_tunnel_add     = liquidio_add_vxlan_port,
1878 	.ndo_udp_tunnel_del     = liquidio_del_vxlan_port,
1879 };
1880 
1881 static int lio_nic_info(struct octeon_recv_info *recv_info, void *buf)
1882 {
1883 	struct octeon_device *oct = (struct octeon_device *)buf;
1884 	struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
1885 	union oct_link_status *ls;
1886 	int gmxport = 0;
1887 	int i;
1888 
1889 	if (recv_pkt->buffer_size[0] != (sizeof(*ls) + OCT_DROQ_INFO_SIZE)) {
1890 		dev_err(&oct->pci_dev->dev, "Malformed NIC_INFO, len=%d, ifidx=%d\n",
1891 			recv_pkt->buffer_size[0],
1892 			recv_pkt->rh.r_nic_info.gmxport);
1893 		goto nic_info_err;
1894 	}
1895 
1896 	gmxport = recv_pkt->rh.r_nic_info.gmxport;
1897 	ls = (union oct_link_status *)(get_rbd(recv_pkt->buffer_ptr[0]) +
1898 		OCT_DROQ_INFO_SIZE);
1899 
1900 	octeon_swap_8B_data((u64 *)ls, (sizeof(union oct_link_status)) >> 3);
1901 
1902 	for (i = 0; i < oct->ifcount; i++) {
1903 		if (oct->props[i].gmxport == gmxport) {
1904 			update_link_status(oct->props[i].netdev, ls);
1905 			break;
1906 		}
1907 	}
1908 
1909 nic_info_err:
1910 	for (i = 0; i < recv_pkt->buffer_count; i++)
1911 		recv_buffer_free(recv_pkt->buffer_ptr[i]);
1912 	octeon_free_recv_info(recv_info);
1913 	return 0;
1914 }
1915 
1916 /**
1917  * \brief Setup network interfaces
1918  * @param octeon_dev  octeon device
1919  *
1920  * Called during init time for each device. It assumes the NIC
1921  * is already up and running.  The link information for each
1922  * interface is passed in link_info.
1923  */
1924 static int setup_nic_devices(struct octeon_device *octeon_dev)
1925 {
1926 	int retval, num_iqueues, num_oqueues;
1927 	u32 resp_size, data_size;
1928 	struct liquidio_if_cfg_resp *resp;
1929 	struct octeon_soft_command *sc;
1930 	union oct_nic_if_cfg if_cfg;
1931 	struct octdev_props *props;
1932 	struct net_device *netdev;
1933 	struct lio_version *vdata;
1934 	struct lio *lio = NULL;
1935 	u8 mac[ETH_ALEN], i, j;
1936 	u32 ifidx_or_pfnum;
1937 
1938 	ifidx_or_pfnum = octeon_dev->pf_num;
1939 
1940 	/* This is to handle link status changes */
1941 	octeon_register_dispatch_fn(octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1942 				    lio_nic_info, octeon_dev);
1943 
1944 	/* REQTYPE_RESP_NET and REQTYPE_SOFT_COMMAND do not have free functions.
1945 	 * They are handled directly.
1946 	 */
1947 	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET,
1948 					free_netbuf);
1949 
1950 	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_NORESP_NET_SG,
1951 					free_netsgbuf);
1952 
1953 	octeon_register_reqtype_free_fn(octeon_dev, REQTYPE_RESP_NET_SG,
1954 					free_netsgbuf_with_resp);
1955 
1956 	for (i = 0; i < octeon_dev->ifcount; i++) {
1957 		resp_size = sizeof(struct liquidio_if_cfg_resp);
1958 		data_size = sizeof(struct lio_version);
1959 		sc = (struct octeon_soft_command *)
1960 			octeon_alloc_soft_command(octeon_dev, data_size,
1961 						  resp_size, 0);
1962 		resp = (struct liquidio_if_cfg_resp *)sc->virtrptr;
1963 		vdata = (struct lio_version *)sc->virtdptr;
1964 
1965 		*((u64 *)vdata) = 0;
1966 		vdata->major = cpu_to_be16(LIQUIDIO_BASE_MAJOR_VERSION);
1967 		vdata->minor = cpu_to_be16(LIQUIDIO_BASE_MINOR_VERSION);
1968 		vdata->micro = cpu_to_be16(LIQUIDIO_BASE_MICRO_VERSION);
1969 
1970 		if_cfg.u64 = 0;
1971 
1972 		if_cfg.s.num_iqueues = octeon_dev->sriov_info.rings_per_vf;
1973 		if_cfg.s.num_oqueues = octeon_dev->sriov_info.rings_per_vf;
1974 		if_cfg.s.base_queue = 0;
1975 
1976 		sc->iq_no = 0;
1977 
1978 		octeon_prepare_soft_command(octeon_dev, sc, OPCODE_NIC,
1979 					    OPCODE_NIC_IF_CFG, 0, if_cfg.u64,
1980 					    0);
1981 
1982 		init_completion(&sc->complete);
1983 		sc->sc_status = OCTEON_REQUEST_PENDING;
1984 
1985 		retval = octeon_send_soft_command(octeon_dev, sc);
1986 		if (retval == IQ_SEND_FAILED) {
1987 			dev_err(&octeon_dev->pci_dev->dev,
1988 				"iq/oq config failed status: %x\n", retval);
1989 			/* Soft instr is freed by driver in case of failure. */
1990 			octeon_free_soft_command(octeon_dev, sc);
1991 			return(-EIO);
1992 		}
1993 
1994 		/* Sleep on a wait queue till the cond flag indicates that the
1995 		 * response arrived or timed-out.
1996 		 */
1997 		retval = wait_for_sc_completion_timeout(octeon_dev, sc, 0);
1998 		if (retval)
1999 			return retval;
2000 
2001 		retval = resp->status;
2002 		if (retval) {
2003 			dev_err(&octeon_dev->pci_dev->dev,
2004 				"iq/oq config failed, retval = %d\n", retval);
2005 			WRITE_ONCE(sc->caller_is_done, true);
2006 			return -EIO;
2007 		}
2008 
2009 		snprintf(octeon_dev->fw_info.liquidio_firmware_version,
2010 			 32, "%s",
2011 			 resp->cfg_info.liquidio_firmware_version);
2012 
2013 		octeon_swap_8B_data((u64 *)(&resp->cfg_info),
2014 				    (sizeof(struct liquidio_if_cfg_info)) >> 3);
2015 
2016 		num_iqueues = hweight64(resp->cfg_info.iqmask);
2017 		num_oqueues = hweight64(resp->cfg_info.oqmask);
2018 
2019 		if (!(num_iqueues) || !(num_oqueues)) {
2020 			dev_err(&octeon_dev->pci_dev->dev,
2021 				"Got bad iqueues (%016llx) or oqueues (%016llx) from firmware.\n",
2022 				resp->cfg_info.iqmask, resp->cfg_info.oqmask);
2023 			WRITE_ONCE(sc->caller_is_done, true);
2024 			goto setup_nic_dev_done;
2025 		}
2026 		dev_dbg(&octeon_dev->pci_dev->dev,
2027 			"interface %d, iqmask %016llx, oqmask %016llx, numiqueues %d, numoqueues %d\n",
2028 			i, resp->cfg_info.iqmask, resp->cfg_info.oqmask,
2029 			num_iqueues, num_oqueues);
2030 
2031 		netdev = alloc_etherdev_mq(LIO_SIZE, num_iqueues);
2032 
2033 		if (!netdev) {
2034 			dev_err(&octeon_dev->pci_dev->dev, "Device allocation failed\n");
2035 			WRITE_ONCE(sc->caller_is_done, true);
2036 			goto setup_nic_dev_done;
2037 		}
2038 
2039 		SET_NETDEV_DEV(netdev, &octeon_dev->pci_dev->dev);
2040 
2041 		/* Associate the routines that will handle different
2042 		 * netdev tasks.
2043 		 */
2044 		netdev->netdev_ops = &lionetdevops;
2045 
2046 		lio = GET_LIO(netdev);
2047 
2048 		memset(lio, 0, sizeof(struct lio));
2049 
2050 		lio->ifidx = ifidx_or_pfnum;
2051 
2052 		props = &octeon_dev->props[i];
2053 		props->gmxport = resp->cfg_info.linfo.gmxport;
2054 		props->netdev = netdev;
2055 
2056 		lio->linfo.num_rxpciq = num_oqueues;
2057 		lio->linfo.num_txpciq = num_iqueues;
2058 
2059 		for (j = 0; j < num_oqueues; j++) {
2060 			lio->linfo.rxpciq[j].u64 =
2061 			    resp->cfg_info.linfo.rxpciq[j].u64;
2062 		}
2063 		for (j = 0; j < num_iqueues; j++) {
2064 			lio->linfo.txpciq[j].u64 =
2065 			    resp->cfg_info.linfo.txpciq[j].u64;
2066 		}
2067 
2068 		lio->linfo.hw_addr = resp->cfg_info.linfo.hw_addr;
2069 		lio->linfo.gmxport = resp->cfg_info.linfo.gmxport;
2070 		lio->linfo.link.u64 = resp->cfg_info.linfo.link.u64;
2071 		lio->linfo.macaddr_is_admin_asgnd =
2072 			resp->cfg_info.linfo.macaddr_is_admin_asgnd;
2073 		lio->linfo.macaddr_spoofchk =
2074 			resp->cfg_info.linfo.macaddr_spoofchk;
2075 
2076 		lio->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2077 
2078 		lio->dev_capability = NETIF_F_HIGHDMA
2079 				      | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
2080 				      | NETIF_F_SG | NETIF_F_RXCSUM
2081 				      | NETIF_F_TSO | NETIF_F_TSO6
2082 				      | NETIF_F_GRO
2083 				      | NETIF_F_LRO;
2084 		netif_set_gso_max_size(netdev, OCTNIC_GSO_MAX_SIZE);
2085 
2086 		/* Copy of transmit encapsulation capabilities:
2087 		 * TSO, TSO6, Checksums for this device
2088 		 */
2089 		lio->enc_dev_capability = NETIF_F_IP_CSUM
2090 					  | NETIF_F_IPV6_CSUM
2091 					  | NETIF_F_GSO_UDP_TUNNEL
2092 					  | NETIF_F_HW_CSUM | NETIF_F_SG
2093 					  | NETIF_F_RXCSUM
2094 					  | NETIF_F_TSO | NETIF_F_TSO6
2095 					  | NETIF_F_LRO;
2096 
2097 		netdev->hw_enc_features =
2098 		    (lio->enc_dev_capability & ~NETIF_F_LRO);
2099 		netdev->vlan_features = lio->dev_capability;
2100 		/* Add any unchangeable hw features */
2101 		lio->dev_capability |= NETIF_F_HW_VLAN_CTAG_FILTER |
2102 				       NETIF_F_HW_VLAN_CTAG_RX |
2103 				       NETIF_F_HW_VLAN_CTAG_TX;
2104 
2105 		netdev->features = (lio->dev_capability & ~NETIF_F_LRO);
2106 
2107 		netdev->hw_features = lio->dev_capability;
2108 		netdev->hw_features &= ~NETIF_F_HW_VLAN_CTAG_RX;
2109 
2110 		/* MTU range: 68 - 16000 */
2111 		netdev->min_mtu = LIO_MIN_MTU_SIZE;
2112 		netdev->max_mtu = LIO_MAX_MTU_SIZE;
2113 
2114 		WRITE_ONCE(sc->caller_is_done, true);
2115 
2116 		/* Point to the  properties for octeon device to which this
2117 		 * interface belongs.
2118 		 */
2119 		lio->oct_dev = octeon_dev;
2120 		lio->octprops = props;
2121 		lio->netdev = netdev;
2122 
2123 		dev_dbg(&octeon_dev->pci_dev->dev,
2124 			"if%d gmx: %d hw_addr: 0x%llx\n", i,
2125 			lio->linfo.gmxport, CVM_CAST64(lio->linfo.hw_addr));
2126 
2127 		/* 64-bit swap required on LE machines */
2128 		octeon_swap_8B_data(&lio->linfo.hw_addr, 1);
2129 		for (j = 0; j < ETH_ALEN; j++)
2130 			mac[j] = *((u8 *)(((u8 *)&lio->linfo.hw_addr) + 2 + j));
2131 
2132 		/* Copy MAC Address to OS network device structure */
2133 		ether_addr_copy(netdev->dev_addr, mac);
2134 
2135 		if (liquidio_setup_io_queues(octeon_dev, i,
2136 					     lio->linfo.num_txpciq,
2137 					     lio->linfo.num_rxpciq)) {
2138 			dev_err(&octeon_dev->pci_dev->dev, "I/O queues creation failed\n");
2139 			goto setup_nic_dev_free;
2140 		}
2141 
2142 		ifstate_set(lio, LIO_IFSTATE_DROQ_OPS);
2143 
2144 		/* For VFs, enable Octeon device interrupts here,
2145 		 * as this is contingent upon IO queue setup
2146 		 */
2147 		octeon_dev->fn_list.enable_interrupt(octeon_dev,
2148 						     OCTEON_ALL_INTR);
2149 
2150 		/* By default all interfaces on a single Octeon uses the same
2151 		 * tx and rx queues
2152 		 */
2153 		lio->txq = lio->linfo.txpciq[0].s.q_no;
2154 		lio->rxq = lio->linfo.rxpciq[0].s.q_no;
2155 
2156 		lio->tx_qsize = octeon_get_tx_qsize(octeon_dev, lio->txq);
2157 		lio->rx_qsize = octeon_get_rx_qsize(octeon_dev, lio->rxq);
2158 
2159 		if (lio_setup_glists(octeon_dev, lio, num_iqueues)) {
2160 			dev_err(&octeon_dev->pci_dev->dev,
2161 				"Gather list allocation failed\n");
2162 			goto setup_nic_dev_free;
2163 		}
2164 
2165 		/* Register ethtool support */
2166 		liquidio_set_ethtool_ops(netdev);
2167 		if (lio->oct_dev->chip_id == OCTEON_CN23XX_VF_VID)
2168 			octeon_dev->priv_flags = OCT_PRIV_FLAG_DEFAULT;
2169 		else
2170 			octeon_dev->priv_flags = 0x0;
2171 
2172 		if (netdev->features & NETIF_F_LRO)
2173 			liquidio_set_feature(netdev, OCTNET_CMD_LRO_ENABLE,
2174 					     OCTNIC_LROIPV4 | OCTNIC_LROIPV6);
2175 
2176 		if (setup_link_status_change_wq(netdev))
2177 			goto setup_nic_dev_free;
2178 
2179 		if (setup_rx_oom_poll_fn(netdev))
2180 			goto setup_nic_dev_free;
2181 
2182 		/* Register the network device with the OS */
2183 		if (register_netdev(netdev)) {
2184 			dev_err(&octeon_dev->pci_dev->dev, "Device registration failed\n");
2185 			goto setup_nic_dev_free;
2186 		}
2187 
2188 		dev_dbg(&octeon_dev->pci_dev->dev,
2189 			"Setup NIC ifidx:%d mac:%02x%02x%02x%02x%02x%02x\n",
2190 			i, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
2191 		netif_carrier_off(netdev);
2192 		lio->link_changes++;
2193 
2194 		ifstate_set(lio, LIO_IFSTATE_REGISTERED);
2195 
2196 		/* Sending command to firmware to enable Rx checksum offload
2197 		 * by default at the time of setup of Liquidio driver for
2198 		 * this device
2199 		 */
2200 		liquidio_set_rxcsum_command(netdev, OCTNET_CMD_TNL_RX_CSUM_CTL,
2201 					    OCTNET_CMD_RXCSUM_ENABLE);
2202 		liquidio_set_feature(netdev, OCTNET_CMD_TNL_TX_CSUM_CTL,
2203 				     OCTNET_CMD_TXCSUM_ENABLE);
2204 
2205 		dev_dbg(&octeon_dev->pci_dev->dev,
2206 			"NIC ifidx:%d Setup successful\n", i);
2207 
2208 		octeon_dev->no_speed_setting = 1;
2209 	}
2210 
2211 	return 0;
2212 
2213 setup_nic_dev_free:
2214 
2215 	while (i--) {
2216 		dev_err(&octeon_dev->pci_dev->dev,
2217 			"NIC ifidx:%d Setup failed\n", i);
2218 		liquidio_destroy_nic_device(octeon_dev, i);
2219 	}
2220 
2221 setup_nic_dev_done:
2222 
2223 	return -ENODEV;
2224 }
2225 
2226 /**
2227  * \brief initialize the NIC
2228  * @param oct octeon device
2229  *
2230  * This initialization routine is called once the Octeon device application is
2231  * up and running
2232  */
2233 static int liquidio_init_nic_module(struct octeon_device *oct)
2234 {
2235 	int num_nic_ports = 1;
2236 	int i, retval = 0;
2237 
2238 	dev_dbg(&oct->pci_dev->dev, "Initializing network interfaces\n");
2239 
2240 	/* only default iq and oq were initialized
2241 	 * initialize the rest as well run port_config command for each port
2242 	 */
2243 	oct->ifcount = num_nic_ports;
2244 	memset(oct->props, 0,
2245 	       sizeof(struct octdev_props) * num_nic_ports);
2246 
2247 	for (i = 0; i < MAX_OCTEON_LINKS; i++)
2248 		oct->props[i].gmxport = -1;
2249 
2250 	retval = setup_nic_devices(oct);
2251 	if (retval) {
2252 		dev_err(&oct->pci_dev->dev, "Setup NIC devices failed\n");
2253 		goto octnet_init_failure;
2254 	}
2255 
2256 	dev_dbg(&oct->pci_dev->dev, "Network interfaces ready\n");
2257 
2258 	return retval;
2259 
2260 octnet_init_failure:
2261 
2262 	oct->ifcount = 0;
2263 
2264 	return retval;
2265 }
2266 
2267 /**
2268  * \brief Device initialization for each Octeon device that is probed
2269  * @param octeon_dev  octeon device
2270  */
2271 static int octeon_device_init(struct octeon_device *oct)
2272 {
2273 	u32 rev_id;
2274 	int j;
2275 
2276 	atomic_set(&oct->status, OCT_DEV_BEGIN_STATE);
2277 
2278 	/* Enable access to the octeon device and make its DMA capability
2279 	 * known to the OS.
2280 	 */
2281 	if (octeon_pci_os_setup(oct))
2282 		return 1;
2283 	atomic_set(&oct->status, OCT_DEV_PCI_ENABLE_DONE);
2284 
2285 	oct->chip_id = OCTEON_CN23XX_VF_VID;
2286 	pci_read_config_dword(oct->pci_dev, 8, &rev_id);
2287 	oct->rev_id = rev_id & 0xff;
2288 
2289 	if (cn23xx_setup_octeon_vf_device(oct))
2290 		return 1;
2291 
2292 	atomic_set(&oct->status, OCT_DEV_PCI_MAP_DONE);
2293 
2294 	oct->app_mode = CVM_DRV_NIC_APP;
2295 
2296 	/* Initialize the dispatch mechanism used to push packets arriving on
2297 	 * Octeon Output queues.
2298 	 */
2299 	if (octeon_init_dispatch_list(oct))
2300 		return 1;
2301 
2302 	atomic_set(&oct->status, OCT_DEV_DISPATCH_INIT_DONE);
2303 
2304 	if (octeon_set_io_queues_off(oct)) {
2305 		dev_err(&oct->pci_dev->dev, "setting io queues off failed\n");
2306 		return 1;
2307 	}
2308 
2309 	if (oct->fn_list.setup_device_regs(oct)) {
2310 		dev_err(&oct->pci_dev->dev, "device registers configuration failed\n");
2311 		return 1;
2312 	}
2313 
2314 	/* Initialize soft command buffer pool */
2315 	if (octeon_setup_sc_buffer_pool(oct)) {
2316 		dev_err(&oct->pci_dev->dev, "sc buffer pool allocation failed\n");
2317 		return 1;
2318 	}
2319 	atomic_set(&oct->status, OCT_DEV_SC_BUFF_POOL_INIT_DONE);
2320 
2321 	/* Setup the data structures that manage this Octeon's Input queues. */
2322 	if (octeon_setup_instr_queues(oct)) {
2323 		dev_err(&oct->pci_dev->dev, "instruction queue initialization failed\n");
2324 		return 1;
2325 	}
2326 	atomic_set(&oct->status, OCT_DEV_INSTR_QUEUE_INIT_DONE);
2327 
2328 	/* Initialize lists to manage the requests of different types that
2329 	 * arrive from user & kernel applications for this octeon device.
2330 	 */
2331 	if (octeon_setup_response_list(oct)) {
2332 		dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2333 		return 1;
2334 	}
2335 	atomic_set(&oct->status, OCT_DEV_RESP_LIST_INIT_DONE);
2336 
2337 	if (octeon_setup_output_queues(oct)) {
2338 		dev_err(&oct->pci_dev->dev, "Output queue initialization failed\n");
2339 		return 1;
2340 	}
2341 	atomic_set(&oct->status, OCT_DEV_DROQ_INIT_DONE);
2342 
2343 	if (oct->fn_list.setup_mbox(oct)) {
2344 		dev_err(&oct->pci_dev->dev, "Mailbox setup failed\n");
2345 		return 1;
2346 	}
2347 	atomic_set(&oct->status, OCT_DEV_MBOX_SETUP_DONE);
2348 
2349 	if (octeon_allocate_ioq_vector(oct, oct->sriov_info.rings_per_vf)) {
2350 		dev_err(&oct->pci_dev->dev, "ioq vector allocation failed\n");
2351 		return 1;
2352 	}
2353 	atomic_set(&oct->status, OCT_DEV_MSIX_ALLOC_VECTOR_DONE);
2354 
2355 	dev_info(&oct->pci_dev->dev, "OCTEON_CN23XX VF Version: %s, %d ioqs\n",
2356 		 LIQUIDIO_VERSION, oct->sriov_info.rings_per_vf);
2357 
2358 	/* Setup the interrupt handler and record the INT SUM register address*/
2359 	if (octeon_setup_interrupt(oct, oct->sriov_info.rings_per_vf))
2360 		return 1;
2361 
2362 	atomic_set(&oct->status, OCT_DEV_INTR_SET_DONE);
2363 
2364 	/* ***************************************************************
2365 	 * The interrupts need to be enabled for the PF<-->VF handshake.
2366 	 * They are [re]-enabled after the PF<-->VF handshake so that the
2367 	 * correct OQ tick value is used (i.e. the value retrieved from
2368 	 * the PF as part of the handshake).
2369 	 */
2370 
2371 	/* Enable Octeon device interrupts */
2372 	oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2373 
2374 	if (cn23xx_octeon_pfvf_handshake(oct))
2375 		return 1;
2376 
2377 	/* Here we [re]-enable the interrupts so that the correct OQ tick value
2378 	 * is used (i.e. the value that was retrieved during the handshake)
2379 	 */
2380 
2381 	/* Enable Octeon device interrupts */
2382 	oct->fn_list.enable_interrupt(oct, OCTEON_ALL_INTR);
2383 	/* *************************************************************** */
2384 
2385 	/* Enable the input and output queues for this Octeon device */
2386 	if (oct->fn_list.enable_io_queues(oct)) {
2387 		dev_err(&oct->pci_dev->dev, "enabling io queues failed\n");
2388 		return 1;
2389 	}
2390 
2391 	atomic_set(&oct->status, OCT_DEV_IO_QUEUES_DONE);
2392 
2393 	atomic_set(&oct->status, OCT_DEV_HOST_OK);
2394 
2395 	/* Send Credit for Octeon Output queues. Credits are always sent after
2396 	 * the output queue is enabled.
2397 	 */
2398 	for (j = 0; j < oct->num_oqs; j++)
2399 		writel(oct->droq[j]->max_count, oct->droq[j]->pkts_credit_reg);
2400 
2401 	/* Packets can start arriving on the output queues from this point. */
2402 
2403 	atomic_set(&oct->status, OCT_DEV_CORE_OK);
2404 
2405 	atomic_set(&oct->status, OCT_DEV_RUNNING);
2406 
2407 	if (liquidio_init_nic_module(oct))
2408 		return 1;
2409 
2410 	return 0;
2411 }
2412 
2413 static int __init liquidio_vf_init(void)
2414 {
2415 	octeon_init_device_list(0);
2416 	return pci_register_driver(&liquidio_vf_pci_driver);
2417 }
2418 
2419 static void __exit liquidio_vf_exit(void)
2420 {
2421 	pci_unregister_driver(&liquidio_vf_pci_driver);
2422 
2423 	pr_info("LiquidIO_VF network module is now unloaded\n");
2424 }
2425 
2426 module_init(liquidio_vf_init);
2427 module_exit(liquidio_vf_exit);
2428