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