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(droq: oct->droq[i]);
87	}
88	if (pkt_cnt > 0) {
89	pending_pkts += pkt_cnt;
90	tasklet_schedule(t: &oct_priv->droq_tasklet);
91	}
92	pkt_cnt = 0;
93	schedule_timeout_uninterruptible(timeout: 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(timeout: 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(v: &iq->instr_pending)) {
128	spin_lock_bh(lock: &iq->lock);
129	iq->fill_cnt = 0;
130	iq->octeon_read_index = iq->host_write_index;
131	iq->stats.instr_processed +=
132	atomic_read(v: &iq->instr_pending);
133	lio_process_iq_request_list(oct, iq, napi_budget: 0);
134	spin_unlock_bh(lock: &iq->lock);
135	}
136	}
137
138	/* Force all pending ordered list requests to time out. */
139	lio_process_ordered_list(octeon_dev: oct, force_quit: 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, where: pos + PCI_ERR_UNCOR_STATUS, val: &status);
156	pci_read_config_dword(dev, where: pos + PCI_ERR_UNCOR_SEVER, val: &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, where: pos + PCI_ERR_UNCOR_STATUS, val: 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(v: &oct->status, OCT_DEV_IN_RESET);
175
176	for (i = 0; i < oct->ifcount; i++)
177	netif_device_detach(dev: 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(irq: msix_entries[i].vector,
188	NULL);
189	free_irq(msix_entries[i].vector,
190	&oct->ioq_vector[i]);
191	}
192	pci_disable_msix(dev: oct->pci_dev);
193	kfree(objp: 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(dev: oct->pci_dev);
202
203	pci_disable_device(dev: 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(dev: 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(fmt: "link-status",
307	flags: WQ_MEM_RECLAIM, max_active: 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(dwork: &lio->link_status_wq.wk.work);
325	destroy_workqueue(wq: 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(dev: netdev);
352	wake_txqs(netdev);
353	} else {
354	netif_carrier_off(dev: 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(wq: lio->link_status_wq.wq,
370	dwork: &lio->link_status_wq.wk.work, delay: 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(pci_id: pdev->device,
387	priv_size: 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, data: 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: 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(dev: oct->pci_dev);
424
425	pci_cfg_access_lock(dev: oct->pci_dev);
426
427	/* Quiesce the device completely */
428	pci_write_config_word(dev: oct->pci_dev, PCI_COMMAND,
429	PCI_COMMAND_INTX_DISABLE);
430
431	pcie_flr(dev: oct->pci_dev);
432
433	pci_cfg_access_unlock(dev: oct->pci_dev);
434
435	pci_restore_state(dev: 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(v: &oct->status)) {
449	case OCT_DEV_RUNNING:
450	case OCT_DEV_CORE_OK:
451	/* No more instructions will be forwarded. */
452	atomic_set(v: &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(v: &iq->instr_pending)) {
489	spin_lock_bh(lock: &iq->lock);
490	iq->fill_cnt = 0;
491	iq->octeon_read_index = iq->host_write_index;
492	iq->stats.instr_processed +=
493	atomic_read(v: &iq->instr_pending);
494	lio_process_iq_request_list(oct, iq, napi_budget: 0);
495	spin_unlock_bh(lock: &iq->lock);
496	}
497	}
498
499	lio_process_ordered_list(octeon_dev: oct, force_quit: 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	irq: 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(dev: oct->pci_dev);
521	kfree(objp: oct->msix_entries);
522	oct->msix_entries = NULL;
523	kfree(objp: oct->irq_name_storage);
524	oct->irq_name_storage = NULL;
525	}
526	/* Soft reset the octeon device before exiting */
527	if (!pcie_reset_flr(dev: 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_dev: oct, q_no: i);
548	}
549
550	fallthrough;
551	case OCT_DEV_RESP_LIST_INIT_DONE:
552	octeon_delete_response_list(octeon_dev: 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(octeon_dev: oct, iq_no: 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(octeon_dev: oct);
569	cancel_delayed_work_sync(dwork: &oct->nic_poll_work.work);
570
571	fallthrough;
572	case OCT_DEV_PCI_MAP_DONE:
573	octeon_unmap_pci_barx(oct, baridx: 0);
574	octeon_unmap_pci_barx(oct, baridx: 1);
575
576	fallthrough;
577	case OCT_DEV_PCI_ENABLE_DONE:
578	/* Disable the device, releasing the PCI INT */
579	pci_disable_device(dev: 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(t: &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	rdatasize: 16, ctxsize: 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(data: (u64 *)ncmd, blocks: (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, irh_ossp: 0, ossp0: 0, ossp1: 0);
626
627	init_completion(x: &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_dev: oct, sc, timeout: 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(v: &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(n: 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(t: &oct_priv->droq_tasklet);
691
692	if (atomic_read(v: &lio->ifstate) & LIO_IFSTATE_REGISTERED)
693	unregister_netdev(dev: 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(dev: 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(lock: &oct->cmd_resp_wqlock);
724	oct->cmd_resp_state = OCT_DRV_OFFLINE;
725	spin_unlock_bh(lock: &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	q_no: lio->linfo.rxpciq[j].s.q_no);
732	}
733
734	for (i = 0; i < oct->ifcount; i++)
735	liquidio_destroy_nic_device(oct, ifidx: 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: 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: 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: 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(dev: 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(dev: &oct->pci_dev->dev, DMA_BIT_MASK(64))) {
785	dev_err(&oct->pci_dev->dev, "Unexpected DMA device capability\n");
786	pci_disable_device(dev: oct->pci_dev);
787	return 1;
788	}
789
790	/* Enable PCI DMA Master. */
791	pci_set_master(dev: 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(buffer: 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(oct: lio->oct_dev, skb);
849
850	spin_lock(lock: &lio->glist_lock[iq]);
851	list_add_tail(new: &g->list, head: &lio->glist[iq]);
852	spin_unlock(lock: &lio->glist_lock[iq]);
853
854	tx_buffer_free(buffer: 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(oct: lio->oct_dev, skb);
893
894	spin_lock(lock: &lio->glist_lock[iq]);
895	list_add_tail(new: &g->list, head: &lio->glist[iq]);
896	spin_unlock(lock: &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(t: &oct_priv->droq_tasklet);
915
916	list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
917	napi_enable(n: 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(dwork: &lio->stats_wk.work, delay: 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, start_stop: 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, start_stop: 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(dev: 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(n: napi);
984
985	oct->props[lio->ifidx].napi_enabled = 0;
986
987	oct->droq[0]->ops.poll_mode = 0;
988
989	tasklet_enable(t: &oct_priv->droq_tasklet);
990	}
991
992	cancel_delayed_work_sync(dwork: &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(dst: ((u8 *)mac) + 2, src: ha->addr);
1062	mac++;
1063	}
1064
1065	octnet_send_nic_ctrl_pkt(oct: lio->oct_dev, nctrl: &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(dst: ((u8 *)mc) + 2, src: 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(oct: lio->oct_dev, nctrl: &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: addr->sa_data))
1132	return -EADDRNOTAVAIL;
1133
1134	if (ether_addr_equal(addr1: addr->sa_data, addr2: 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(dst: (u8 *)&nctrl.udd[0] + 2, src: addr->sa_data);
1152
1153	ret = octnet_send_nic_ctrl_pkt(oct: lio->oct_dev, nctrl: &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(dev: netdev, addr: addr->sa_data);
1166	ether_addr_copy(dst: ((u8 *)&lio->linfo.hw_addr) + 2, src: 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(to: &conf, from: ifr->ifr_data, n: 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(to: ifr->ifr_data, from: &conf, n: 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(data: &resp->timestamp, blocks: 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: ns + lio->ptp_adjust);
1338	skb_tstamp_tx(orig_skb: skb, hwtstamps: &ts);
1339	}
1340
1341	octeon_free_soft_command(oct, sc);
1342	tx_buffer_free(buffer: 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, cmd: &ndata->cmd,
1364	rdatasize: 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, iq_no: sc->iq_no, force_db: ring_doorbell, cmd: &sc->cmd,
1386	buf: sc, datasize: len, reqtype: 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(oct: 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(v: &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, q_no: 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, cmd: &ndata.cmd, setup: &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(dev: &oct->pci_dev->dev, dma_addr: 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(lock: &lio->glist_lock[q_idx]);
1507	g = (struct octnic_gather *)
1508	lio_list_delete_head(root: &lio->glist[q_idx]);
1509	spin_unlock(lock: &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, cmd: &ndata.cmd, setup: &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(dev: &oct->pci_dev->dev, dma_addr: 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(sg_entry: &g->sg[0], size: (skb->len - skb->data_len), pos: 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(dev: &oct->pci_dev->dev,
1541	frag, offset: 0, size: skb_frag_size(frag),
1542	dir: DMA_TO_DEVICE);
1543	if (dma_mapping_error(dev: &oct->pci_dev->dev,
1544	dma_addr: 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(sg_entry: &g->sg[(i >> 2)], size: skb_frag_size(frag),
1562	pos: (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: &ndata, finfo, xmit_more);
1593	else
1594	status = octnet_send_nic_data_pkt(oct, ndata: &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(dev: netdev, queue_index: q_idx);
1604	}
1605
1606	netif_trans_update(dev: 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(buffer: 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(dev: 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(oct: lio->oct_dev, nctrl: &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(oct: lio->oct_dev, nctrl: &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(oct: lio->oct_dev, nctrl: &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(oct: lio->oct_dev, nctrl: &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(dev: 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(dev: 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(skb: recv_pkt->buffer_ptr[0]) +
1905	OCT_DROQ_INFO_SIZE);
1906
1907	octeon_swap_8B_data(data: (u64 *)ls, blocks: (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(netdev: 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(buffer: 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(oct: octeon_dev, OPCODE_NIC, OPCODE_NIC_INFO,
1949	fn: lio_nic_info, fn_arg: 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(oct: octeon_dev, REQTYPE_NORESP_NET,
1955	fn: free_netbuf);
1956
1957	octeon_register_reqtype_free_fn(oct: octeon_dev, REQTYPE_NORESP_NET_SG,
1958	fn: free_netsgbuf);
1959
1960	octeon_register_reqtype_free_fn(oct: octeon_dev, REQTYPE_RESP_NET_SG,
1961	fn: 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(oct: octeon_dev, datasize: data_size,
1968	rdatasize: resp_size, ctxsize: 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(oct: octeon_dev, sc, OPCODE_NIC,
1986	OPCODE_NIC_IF_CFG, irh_ossp: 0, ossp0: if_cfg.u64,
1987	ossp1: 0);
1988
1989	init_completion(x: &sc->complete);
1990	sc->sc_status = OCTEON_REQUEST_PENDING;
1991
1992	retval = octeon_send_soft_command(oct: 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(oct: 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(oct_dev: octeon_dev, sc, timeout: 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(buf: octeon_dev->fw_info.liquidio_firmware_version,
2017	size: 32, fmt: "%s",
2018	resp->cfg_info.liquidio_firmware_version);
2019
2020	octeon_swap_8B_data(data: (u64 *)(&resp->cfg_info),
2021	blocks: (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_value: 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(dev: 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(data: &lio->linfo.hw_addr, blocks: 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(dev: netdev, addr: mac);
2143
2144	if (liquidio_setup_io_queues(octeon_dev, ifidx: i,
2145	num_iqs: lio->linfo.num_txpciq,
2146	num_oqs: 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(oct: octeon_dev, q_no: lio->txq);
2166	lio->rx_qsize = octeon_get_rx_qsize(oct: octeon_dev, q_no: lio->rxq);
2167
2168	if (lio_setup_glists(oct: octeon_dev, lio, num_qs: 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(dev: 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(dev: 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(oct: octeon_dev, ifidx: 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(v: &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(v: &oct->status, OCT_DEV_PCI_ENABLE_DONE);
2293
2294	oct->chip_id = OCTEON_CN23XX_VF_VID;
2295	pci_read_config_dword(dev: oct->pci_dev, where: 8, val: &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(v: &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(octeon_dev: oct))
2309	return 1;
2310
2311	atomic_set(v: &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(v: &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(v: &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(octeon_dev: oct)) {
2341	dev_err(&oct->pci_dev->dev, "Response list allocation failed\n");
2342	return 1;
2343	}
2344	atomic_set(v: &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(v: &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(v: &oct->status, OCT_DEV_MBOX_SETUP_DONE);
2357
2358	if (octeon_allocate_ioq_vector(oct, num_ioqs: 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(v: &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, num_ioqs: oct->sriov_info.rings_per_vf))
2369	return 1;
2370
2371	atomic_set(v: &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(v: &oct->status, OCT_DEV_IO_QUEUES_DONE);
2401
2402	atomic_set(v: &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(val: oct->droq[j]->max_count, addr: oct->droq[j]->pkts_credit_reg);
2409
2410	/* Packets can start arriving on the output queues from this point. */
2411
2412	atomic_set(v: &oct->status, OCT_DEV_CORE_OK);
2413
2414	atomic_set(v: &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(conf_type: 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(dev: &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