1 /*
2  * This file is part of the Chelsio T4 PCI-E SR-IOV Virtual Function Ethernet
3  * driver for Linux.
4  *
5  * Copyright (c) 2009-2010 Chelsio Communications, Inc. All rights reserved.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * OpenIB.org BSD license below:
12  *
13  *     Redistribution and use in source and binary forms, with or
14  *     without modification, are permitted provided that the following
15  *     conditions are met:
16  *
17  *      - Redistributions of source code must retain the above
18  *        copyright notice, this list of conditions and the following
19  *        disclaimer.
20  *
21  *      - Redistributions in binary form must reproduce the above
22  *        copyright notice, this list of conditions and the following
23  *        disclaimer in the documentation and/or other materials
24  *        provided with the distribution.
25  *
26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33  * SOFTWARE.
34  */
35 
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
37 
38 #include <linux/module.h>
39 #include <linux/moduleparam.h>
40 #include <linux/init.h>
41 #include <linux/pci.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/debugfs.h>
46 #include <linux/ethtool.h>
47 #include <linux/mdio.h>
48 
49 #include "t4vf_common.h"
50 #include "t4vf_defs.h"
51 
52 #include "../cxgb4/t4_regs.h"
53 #include "../cxgb4/t4_msg.h"
54 
55 /*
56  * Generic information about the driver.
57  */
58 #define DRV_DESC "Chelsio T4/T5/T6 Virtual Function (VF) Network Driver"
59 
60 /*
61  * Module Parameters.
62  * ==================
63  */
64 
65 /*
66  * Default ethtool "message level" for adapters.
67  */
68 #define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
69 			 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
70 			 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
71 
72 /*
73  * The driver uses the best interrupt scheme available on a platform in the
74  * order MSI-X then MSI.  This parameter determines which of these schemes the
75  * driver may consider as follows:
76  *
77  *     msi = 2: choose from among MSI-X and MSI
78  *     msi = 1: only consider MSI interrupts
79  *
80  * Note that unlike the Physical Function driver, this Virtual Function driver
81  * does _not_ support legacy INTx interrupts (this limitation is mandated by
82  * the PCI-E SR-IOV standard).
83  */
84 #define MSI_MSIX	2
85 #define MSI_MSI		1
86 #define MSI_DEFAULT	MSI_MSIX
87 
88 static int msi = MSI_DEFAULT;
89 
90 module_param(msi, int, 0644);
91 MODULE_PARM_DESC(msi, "whether to use MSI-X or MSI");
92 
93 /*
94  * Fundamental constants.
95  * ======================
96  */
97 
98 enum {
99 	MAX_TXQ_ENTRIES		= 16384,
100 	MAX_RSPQ_ENTRIES	= 16384,
101 	MAX_RX_BUFFERS		= 16384,
102 
103 	MIN_TXQ_ENTRIES		= 32,
104 	MIN_RSPQ_ENTRIES	= 128,
105 	MIN_FL_ENTRIES		= 16,
106 
107 	/*
108 	 * For purposes of manipulating the Free List size we need to
109 	 * recognize that Free Lists are actually Egress Queues (the host
110 	 * produces free buffers which the hardware consumes), Egress Queues
111 	 * indices are all in units of Egress Context Units bytes, and free
112 	 * list entries are 64-bit PCI DMA addresses.  And since the state of
113 	 * the Producer Index == the Consumer Index implies an EMPTY list, we
114 	 * always have at least one Egress Unit's worth of Free List entries
115 	 * unused.  See sge.c for more details ...
116 	 */
117 	EQ_UNIT = SGE_EQ_IDXSIZE,
118 	FL_PER_EQ_UNIT = EQ_UNIT / sizeof(__be64),
119 	MIN_FL_RESID = FL_PER_EQ_UNIT,
120 };
121 
122 /*
123  * Global driver state.
124  * ====================
125  */
126 
127 static struct dentry *cxgb4vf_debugfs_root;
128 
129 /*
130  * OS "Callback" functions.
131  * ========================
132  */
133 
134 /*
135  * The link status has changed on the indicated "port" (Virtual Interface).
136  */
t4vf_os_link_changed(struct adapter * adapter,int pidx,int link_ok)137 void t4vf_os_link_changed(struct adapter *adapter, int pidx, int link_ok)
138 {
139 	struct net_device *dev = adapter->port[pidx];
140 
141 	/*
142 	 * If the port is disabled or the current recorded "link up"
143 	 * status matches the new status, just return.
144 	 */
145 	if (!netif_running(dev) || link_ok == netif_carrier_ok(dev))
146 		return;
147 
148 	/*
149 	 * Tell the OS that the link status has changed and print a short
150 	 * informative message on the console about the event.
151 	 */
152 	if (link_ok) {
153 		const char *s;
154 		const char *fc;
155 		const struct port_info *pi = netdev_priv(dev);
156 
157 		netif_carrier_on(dev);
158 
159 		switch (pi->link_cfg.speed) {
160 		case 100:
161 			s = "100Mbps";
162 			break;
163 		case 1000:
164 			s = "1Gbps";
165 			break;
166 		case 10000:
167 			s = "10Gbps";
168 			break;
169 		case 25000:
170 			s = "25Gbps";
171 			break;
172 		case 40000:
173 			s = "40Gbps";
174 			break;
175 		case 100000:
176 			s = "100Gbps";
177 			break;
178 
179 		default:
180 			s = "unknown";
181 			break;
182 		}
183 
184 		switch ((int)pi->link_cfg.fc) {
185 		case PAUSE_RX:
186 			fc = "RX";
187 			break;
188 
189 		case PAUSE_TX:
190 			fc = "TX";
191 			break;
192 
193 		case PAUSE_RX | PAUSE_TX:
194 			fc = "RX/TX";
195 			break;
196 
197 		default:
198 			fc = "no";
199 			break;
200 		}
201 
202 		netdev_info(dev, "link up, %s, full-duplex, %s PAUSE\n", s, fc);
203 	} else {
204 		netif_carrier_off(dev);
205 		netdev_info(dev, "link down\n");
206 	}
207 }
208 
209 /*
210  * THe port module type has changed on the indicated "port" (Virtual
211  * Interface).
212  */
t4vf_os_portmod_changed(struct adapter * adapter,int pidx)213 void t4vf_os_portmod_changed(struct adapter *adapter, int pidx)
214 {
215 	static const char * const mod_str[] = {
216 		NULL, "LR", "SR", "ER", "passive DA", "active DA", "LRM"
217 	};
218 	const struct net_device *dev = adapter->port[pidx];
219 	const struct port_info *pi = netdev_priv(dev);
220 
221 	if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
222 		dev_info(adapter->pdev_dev, "%s: port module unplugged\n",
223 			 dev->name);
224 	else if (pi->mod_type < ARRAY_SIZE(mod_str))
225 		dev_info(adapter->pdev_dev, "%s: %s port module inserted\n",
226 			 dev->name, mod_str[pi->mod_type]);
227 	else if (pi->mod_type == FW_PORT_MOD_TYPE_NOTSUPPORTED)
228 		dev_info(adapter->pdev_dev, "%s: unsupported optical port "
229 			 "module inserted\n", dev->name);
230 	else if (pi->mod_type == FW_PORT_MOD_TYPE_UNKNOWN)
231 		dev_info(adapter->pdev_dev, "%s: unknown port module inserted,"
232 			 "forcing TWINAX\n", dev->name);
233 	else if (pi->mod_type == FW_PORT_MOD_TYPE_ERROR)
234 		dev_info(adapter->pdev_dev, "%s: transceiver module error\n",
235 			 dev->name);
236 	else
237 		dev_info(adapter->pdev_dev, "%s: unknown module type %d "
238 			 "inserted\n", dev->name, pi->mod_type);
239 }
240 
cxgb4vf_set_addr_hash(struct port_info * pi)241 static int cxgb4vf_set_addr_hash(struct port_info *pi)
242 {
243 	struct adapter *adapter = pi->adapter;
244 	u64 vec = 0;
245 	bool ucast = false;
246 	struct hash_mac_addr *entry;
247 
248 	/* Calculate the hash vector for the updated list and program it */
249 	list_for_each_entry(entry, &adapter->mac_hlist, list) {
250 		ucast |= is_unicast_ether_addr(entry->addr);
251 		vec |= (1ULL << hash_mac_addr(entry->addr));
252 	}
253 	return t4vf_set_addr_hash(adapter, pi->viid, ucast, vec, false);
254 }
255 
256 /**
257  *	cxgb4vf_change_mac - Update match filter for a MAC address.
258  *	@pi: the port_info
259  *	@viid: the VI id
260  *	@tcam_idx: TCAM index of existing filter for old value of MAC address,
261  *		   or -1
262  *	@addr: the new MAC address value
263  *	@persistent: whether a new MAC allocation should be persistent
264  *
265  *	Modifies an MPS filter and sets it to the new MAC address if
266  *	@tcam_idx >= 0, or adds the MAC address to a new filter if
267  *	@tcam_idx < 0. In the latter case the address is added persistently
268  *	if @persist is %true.
269  *	Addresses are programmed to hash region, if tcam runs out of entries.
270  *
271  */
cxgb4vf_change_mac(struct port_info * pi,unsigned int viid,int * tcam_idx,const u8 * addr,bool persistent)272 static int cxgb4vf_change_mac(struct port_info *pi, unsigned int viid,
273 			      int *tcam_idx, const u8 *addr, bool persistent)
274 {
275 	struct hash_mac_addr *new_entry, *entry;
276 	struct adapter *adapter = pi->adapter;
277 	int ret;
278 
279 	ret = t4vf_change_mac(adapter, viid, *tcam_idx, addr, persistent);
280 	/* We ran out of TCAM entries. try programming hash region. */
281 	if (ret == -ENOMEM) {
282 		/* If the MAC address to be updated is in the hash addr
283 		 * list, update it from the list
284 		 */
285 		list_for_each_entry(entry, &adapter->mac_hlist, list) {
286 			if (entry->iface_mac) {
287 				ether_addr_copy(entry->addr, addr);
288 				goto set_hash;
289 			}
290 		}
291 		new_entry = kzalloc(sizeof(*new_entry), GFP_KERNEL);
292 		if (!new_entry)
293 			return -ENOMEM;
294 		ether_addr_copy(new_entry->addr, addr);
295 		new_entry->iface_mac = true;
296 		list_add_tail(&new_entry->list, &adapter->mac_hlist);
297 set_hash:
298 		ret = cxgb4vf_set_addr_hash(pi);
299 	} else if (ret >= 0) {
300 		*tcam_idx = ret;
301 		ret = 0;
302 	}
303 
304 	return ret;
305 }
306 
307 /*
308  * Net device operations.
309  * ======================
310  */
311 
312 
313 
314 
315 /*
316  * Perform the MAC and PHY actions needed to enable a "port" (Virtual
317  * Interface).
318  */
link_start(struct net_device * dev)319 static int link_start(struct net_device *dev)
320 {
321 	int ret;
322 	struct port_info *pi = netdev_priv(dev);
323 
324 	/*
325 	 * We do not set address filters and promiscuity here, the stack does
326 	 * that step explicitly. Enable vlan accel.
327 	 */
328 	ret = t4vf_set_rxmode(pi->adapter, pi->viid, dev->mtu, -1, -1, -1, 1,
329 			      true);
330 	if (ret == 0)
331 		ret = cxgb4vf_change_mac(pi, pi->viid,
332 					 &pi->xact_addr_filt,
333 					 dev->dev_addr, true);
334 
335 	/*
336 	 * We don't need to actually "start the link" itself since the
337 	 * firmware will do that for us when the first Virtual Interface
338 	 * is enabled on a port.
339 	 */
340 	if (ret == 0)
341 		ret = t4vf_enable_pi(pi->adapter, pi, true, true);
342 
343 	return ret;
344 }
345 
346 /*
347  * Name the MSI-X interrupts.
348  */
name_msix_vecs(struct adapter * adapter)349 static void name_msix_vecs(struct adapter *adapter)
350 {
351 	int namelen = sizeof(adapter->msix_info[0].desc) - 1;
352 	int pidx;
353 
354 	/*
355 	 * Firmware events.
356 	 */
357 	snprintf(adapter->msix_info[MSIX_FW].desc, namelen,
358 		 "%s-FWeventq", adapter->name);
359 	adapter->msix_info[MSIX_FW].desc[namelen] = 0;
360 
361 	/*
362 	 * Ethernet queues.
363 	 */
364 	for_each_port(adapter, pidx) {
365 		struct net_device *dev = adapter->port[pidx];
366 		const struct port_info *pi = netdev_priv(dev);
367 		int qs, msi;
368 
369 		for (qs = 0, msi = MSIX_IQFLINT; qs < pi->nqsets; qs++, msi++) {
370 			snprintf(adapter->msix_info[msi].desc, namelen,
371 				 "%s-%d", dev->name, qs);
372 			adapter->msix_info[msi].desc[namelen] = 0;
373 		}
374 	}
375 }
376 
377 /*
378  * Request all of our MSI-X resources.
379  */
request_msix_queue_irqs(struct adapter * adapter)380 static int request_msix_queue_irqs(struct adapter *adapter)
381 {
382 	struct sge *s = &adapter->sge;
383 	int rxq, msi, err;
384 
385 	/*
386 	 * Firmware events.
387 	 */
388 	err = request_irq(adapter->msix_info[MSIX_FW].vec, t4vf_sge_intr_msix,
389 			  0, adapter->msix_info[MSIX_FW].desc, &s->fw_evtq);
390 	if (err)
391 		return err;
392 
393 	/*
394 	 * Ethernet queues.
395 	 */
396 	msi = MSIX_IQFLINT;
397 	for_each_ethrxq(s, rxq) {
398 		err = request_irq(adapter->msix_info[msi].vec,
399 				  t4vf_sge_intr_msix, 0,
400 				  adapter->msix_info[msi].desc,
401 				  &s->ethrxq[rxq].rspq);
402 		if (err)
403 			goto err_free_irqs;
404 		msi++;
405 	}
406 	return 0;
407 
408 err_free_irqs:
409 	while (--rxq >= 0)
410 		free_irq(adapter->msix_info[--msi].vec, &s->ethrxq[rxq].rspq);
411 	free_irq(adapter->msix_info[MSIX_FW].vec, &s->fw_evtq);
412 	return err;
413 }
414 
415 /*
416  * Free our MSI-X resources.
417  */
free_msix_queue_irqs(struct adapter * adapter)418 static void free_msix_queue_irqs(struct adapter *adapter)
419 {
420 	struct sge *s = &adapter->sge;
421 	int rxq, msi;
422 
423 	free_irq(adapter->msix_info[MSIX_FW].vec, &s->fw_evtq);
424 	msi = MSIX_IQFLINT;
425 	for_each_ethrxq(s, rxq)
426 		free_irq(adapter->msix_info[msi++].vec,
427 			 &s->ethrxq[rxq].rspq);
428 }
429 
430 /*
431  * Turn on NAPI and start up interrupts on a response queue.
432  */
qenable(struct sge_rspq * rspq)433 static void qenable(struct sge_rspq *rspq)
434 {
435 	napi_enable(&rspq->napi);
436 
437 	/*
438 	 * 0-increment the Going To Sleep register to start the timer and
439 	 * enable interrupts.
440 	 */
441 	t4_write_reg(rspq->adapter, T4VF_SGE_BASE_ADDR + SGE_VF_GTS,
442 		     CIDXINC_V(0) |
443 		     SEINTARM_V(rspq->intr_params) |
444 		     INGRESSQID_V(rspq->cntxt_id));
445 }
446 
447 /*
448  * Enable NAPI scheduling and interrupt generation for all Receive Queues.
449  */
enable_rx(struct adapter * adapter)450 static void enable_rx(struct adapter *adapter)
451 {
452 	int rxq;
453 	struct sge *s = &adapter->sge;
454 
455 	for_each_ethrxq(s, rxq)
456 		qenable(&s->ethrxq[rxq].rspq);
457 	qenable(&s->fw_evtq);
458 
459 	/*
460 	 * The interrupt queue doesn't use NAPI so we do the 0-increment of
461 	 * its Going To Sleep register here to get it started.
462 	 */
463 	if (adapter->flags & CXGB4VF_USING_MSI)
464 		t4_write_reg(adapter, T4VF_SGE_BASE_ADDR + SGE_VF_GTS,
465 			     CIDXINC_V(0) |
466 			     SEINTARM_V(s->intrq.intr_params) |
467 			     INGRESSQID_V(s->intrq.cntxt_id));
468 
469 }
470 
471 /*
472  * Wait until all NAPI handlers are descheduled.
473  */
quiesce_rx(struct adapter * adapter)474 static void quiesce_rx(struct adapter *adapter)
475 {
476 	struct sge *s = &adapter->sge;
477 	int rxq;
478 
479 	for_each_ethrxq(s, rxq)
480 		napi_disable(&s->ethrxq[rxq].rspq.napi);
481 	napi_disable(&s->fw_evtq.napi);
482 }
483 
484 /*
485  * Response queue handler for the firmware event queue.
486  */
fwevtq_handler(struct sge_rspq * rspq,const __be64 * rsp,const struct pkt_gl * gl)487 static int fwevtq_handler(struct sge_rspq *rspq, const __be64 *rsp,
488 			  const struct pkt_gl *gl)
489 {
490 	/*
491 	 * Extract response opcode and get pointer to CPL message body.
492 	 */
493 	struct adapter *adapter = rspq->adapter;
494 	u8 opcode = ((const struct rss_header *)rsp)->opcode;
495 	void *cpl = (void *)(rsp + 1);
496 
497 	switch (opcode) {
498 	case CPL_FW6_MSG: {
499 		/*
500 		 * We've received an asynchronous message from the firmware.
501 		 */
502 		const struct cpl_fw6_msg *fw_msg = cpl;
503 		if (fw_msg->type == FW6_TYPE_CMD_RPL)
504 			t4vf_handle_fw_rpl(adapter, fw_msg->data);
505 		break;
506 	}
507 
508 	case CPL_FW4_MSG: {
509 		/* FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
510 		 */
511 		const struct cpl_sge_egr_update *p = (void *)(rsp + 3);
512 		opcode = CPL_OPCODE_G(ntohl(p->opcode_qid));
513 		if (opcode != CPL_SGE_EGR_UPDATE) {
514 			dev_err(adapter->pdev_dev, "unexpected FW4/CPL %#x on FW event queue\n"
515 				, opcode);
516 			break;
517 		}
518 		cpl = (void *)p;
519 	}
520 		fallthrough;
521 
522 	case CPL_SGE_EGR_UPDATE: {
523 		/*
524 		 * We've received an Egress Queue Status Update message.  We
525 		 * get these, if the SGE is configured to send these when the
526 		 * firmware passes certain points in processing our TX
527 		 * Ethernet Queue or if we make an explicit request for one.
528 		 * We use these updates to determine when we may need to
529 		 * restart a TX Ethernet Queue which was stopped for lack of
530 		 * free TX Queue Descriptors ...
531 		 */
532 		const struct cpl_sge_egr_update *p = cpl;
533 		unsigned int qid = EGR_QID_G(be32_to_cpu(p->opcode_qid));
534 		struct sge *s = &adapter->sge;
535 		struct sge_txq *tq;
536 		struct sge_eth_txq *txq;
537 		unsigned int eq_idx;
538 
539 		/*
540 		 * Perform sanity checking on the Queue ID to make sure it
541 		 * really refers to one of our TX Ethernet Egress Queues which
542 		 * is active and matches the queue's ID.  None of these error
543 		 * conditions should ever happen so we may want to either make
544 		 * them fatal and/or conditionalized under DEBUG.
545 		 */
546 		eq_idx = EQ_IDX(s, qid);
547 		if (unlikely(eq_idx >= MAX_EGRQ)) {
548 			dev_err(adapter->pdev_dev,
549 				"Egress Update QID %d out of range\n", qid);
550 			break;
551 		}
552 		tq = s->egr_map[eq_idx];
553 		if (unlikely(tq == NULL)) {
554 			dev_err(adapter->pdev_dev,
555 				"Egress Update QID %d TXQ=NULL\n", qid);
556 			break;
557 		}
558 		txq = container_of(tq, struct sge_eth_txq, q);
559 		if (unlikely(tq->abs_id != qid)) {
560 			dev_err(adapter->pdev_dev,
561 				"Egress Update QID %d refers to TXQ %d\n",
562 				qid, tq->abs_id);
563 			break;
564 		}
565 
566 		/*
567 		 * Restart a stopped TX Queue which has less than half of its
568 		 * TX ring in use ...
569 		 */
570 		txq->q.restarts++;
571 		netif_tx_wake_queue(txq->txq);
572 		break;
573 	}
574 
575 	default:
576 		dev_err(adapter->pdev_dev,
577 			"unexpected CPL %#x on FW event queue\n", opcode);
578 	}
579 
580 	return 0;
581 }
582 
583 /*
584  * Allocate SGE TX/RX response queues.  Determine how many sets of SGE queues
585  * to use and initializes them.  We support multiple "Queue Sets" per port if
586  * we have MSI-X, otherwise just one queue set per port.
587  */
setup_sge_queues(struct adapter * adapter)588 static int setup_sge_queues(struct adapter *adapter)
589 {
590 	struct sge *s = &adapter->sge;
591 	int err, pidx, msix;
592 
593 	/*
594 	 * Clear "Queue Set" Free List Starving and TX Queue Mapping Error
595 	 * state.
596 	 */
597 	bitmap_zero(s->starving_fl, MAX_EGRQ);
598 
599 	/*
600 	 * If we're using MSI interrupt mode we need to set up a "forwarded
601 	 * interrupt" queue which we'll set up with our MSI vector.  The rest
602 	 * of the ingress queues will be set up to forward their interrupts to
603 	 * this queue ...  This must be first since t4vf_sge_alloc_rxq() uses
604 	 * the intrq's queue ID as the interrupt forwarding queue for the
605 	 * subsequent calls ...
606 	 */
607 	if (adapter->flags & CXGB4VF_USING_MSI) {
608 		err = t4vf_sge_alloc_rxq(adapter, &s->intrq, false,
609 					 adapter->port[0], 0, NULL, NULL);
610 		if (err)
611 			goto err_free_queues;
612 	}
613 
614 	/*
615 	 * Allocate our ingress queue for asynchronous firmware messages.
616 	 */
617 	err = t4vf_sge_alloc_rxq(adapter, &s->fw_evtq, true, adapter->port[0],
618 				 MSIX_FW, NULL, fwevtq_handler);
619 	if (err)
620 		goto err_free_queues;
621 
622 	/*
623 	 * Allocate each "port"'s initial Queue Sets.  These can be changed
624 	 * later on ... up to the point where any interface on the adapter is
625 	 * brought up at which point lots of things get nailed down
626 	 * permanently ...
627 	 */
628 	msix = MSIX_IQFLINT;
629 	for_each_port(adapter, pidx) {
630 		struct net_device *dev = adapter->port[pidx];
631 		struct port_info *pi = netdev_priv(dev);
632 		struct sge_eth_rxq *rxq = &s->ethrxq[pi->first_qset];
633 		struct sge_eth_txq *txq = &s->ethtxq[pi->first_qset];
634 		int qs;
635 
636 		for (qs = 0; qs < pi->nqsets; qs++, rxq++, txq++) {
637 			err = t4vf_sge_alloc_rxq(adapter, &rxq->rspq, false,
638 						 dev, msix++,
639 						 &rxq->fl, t4vf_ethrx_handler);
640 			if (err)
641 				goto err_free_queues;
642 
643 			err = t4vf_sge_alloc_eth_txq(adapter, txq, dev,
644 					     netdev_get_tx_queue(dev, qs),
645 					     s->fw_evtq.cntxt_id);
646 			if (err)
647 				goto err_free_queues;
648 
649 			rxq->rspq.idx = qs;
650 			memset(&rxq->stats, 0, sizeof(rxq->stats));
651 		}
652 	}
653 
654 	/*
655 	 * Create the reverse mappings for the queues.
656 	 */
657 	s->egr_base = s->ethtxq[0].q.abs_id - s->ethtxq[0].q.cntxt_id;
658 	s->ingr_base = s->ethrxq[0].rspq.abs_id - s->ethrxq[0].rspq.cntxt_id;
659 	IQ_MAP(s, s->fw_evtq.abs_id) = &s->fw_evtq;
660 	for_each_port(adapter, pidx) {
661 		struct net_device *dev = adapter->port[pidx];
662 		struct port_info *pi = netdev_priv(dev);
663 		struct sge_eth_rxq *rxq = &s->ethrxq[pi->first_qset];
664 		struct sge_eth_txq *txq = &s->ethtxq[pi->first_qset];
665 		int qs;
666 
667 		for (qs = 0; qs < pi->nqsets; qs++, rxq++, txq++) {
668 			IQ_MAP(s, rxq->rspq.abs_id) = &rxq->rspq;
669 			EQ_MAP(s, txq->q.abs_id) = &txq->q;
670 
671 			/*
672 			 * The FW_IQ_CMD doesn't return the Absolute Queue IDs
673 			 * for Free Lists but since all of the Egress Queues
674 			 * (including Free Lists) have Relative Queue IDs
675 			 * which are computed as Absolute - Base Queue ID, we
676 			 * can synthesize the Absolute Queue IDs for the Free
677 			 * Lists.  This is useful for debugging purposes when
678 			 * we want to dump Queue Contexts via the PF Driver.
679 			 */
680 			rxq->fl.abs_id = rxq->fl.cntxt_id + s->egr_base;
681 			EQ_MAP(s, rxq->fl.abs_id) = &rxq->fl;
682 		}
683 	}
684 	return 0;
685 
686 err_free_queues:
687 	t4vf_free_sge_resources(adapter);
688 	return err;
689 }
690 
691 /*
692  * Set up Receive Side Scaling (RSS) to distribute packets to multiple receive
693  * queues.  We configure the RSS CPU lookup table to distribute to the number
694  * of HW receive queues, and the response queue lookup table to narrow that
695  * down to the response queues actually configured for each "port" (Virtual
696  * Interface).  We always configure the RSS mapping for all ports since the
697  * mapping table has plenty of entries.
698  */
setup_rss(struct adapter * adapter)699 static int setup_rss(struct adapter *adapter)
700 {
701 	int pidx;
702 
703 	for_each_port(adapter, pidx) {
704 		struct port_info *pi = adap2pinfo(adapter, pidx);
705 		struct sge_eth_rxq *rxq = &adapter->sge.ethrxq[pi->first_qset];
706 		u16 rss[MAX_PORT_QSETS];
707 		int qs, err;
708 
709 		for (qs = 0; qs < pi->nqsets; qs++)
710 			rss[qs] = rxq[qs].rspq.abs_id;
711 
712 		err = t4vf_config_rss_range(adapter, pi->viid,
713 					    0, pi->rss_size, rss, pi->nqsets);
714 		if (err)
715 			return err;
716 
717 		/*
718 		 * Perform Global RSS Mode-specific initialization.
719 		 */
720 		switch (adapter->params.rss.mode) {
721 		case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL:
722 			/*
723 			 * If Tunnel All Lookup isn't specified in the global
724 			 * RSS Configuration, then we need to specify a
725 			 * default Ingress Queue for any ingress packets which
726 			 * aren't hashed.  We'll use our first ingress queue
727 			 * ...
728 			 */
729 			if (!adapter->params.rss.u.basicvirtual.tnlalllookup) {
730 				union rss_vi_config config;
731 				err = t4vf_read_rss_vi_config(adapter,
732 							      pi->viid,
733 							      &config);
734 				if (err)
735 					return err;
736 				config.basicvirtual.defaultq =
737 					rxq[0].rspq.abs_id;
738 				err = t4vf_write_rss_vi_config(adapter,
739 							       pi->viid,
740 							       &config);
741 				if (err)
742 					return err;
743 			}
744 			break;
745 		}
746 	}
747 
748 	return 0;
749 }
750 
751 /*
752  * Bring the adapter up.  Called whenever we go from no "ports" open to having
753  * one open.  This function performs the actions necessary to make an adapter
754  * operational, such as completing the initialization of HW modules, and
755  * enabling interrupts.  Must be called with the rtnl lock held.  (Note that
756  * this is called "cxgb_up" in the PF Driver.)
757  */
adapter_up(struct adapter * adapter)758 static int adapter_up(struct adapter *adapter)
759 {
760 	int err;
761 
762 	/*
763 	 * If this is the first time we've been called, perform basic
764 	 * adapter setup.  Once we've done this, many of our adapter
765 	 * parameters can no longer be changed ...
766 	 */
767 	if ((adapter->flags & CXGB4VF_FULL_INIT_DONE) == 0) {
768 		err = setup_sge_queues(adapter);
769 		if (err)
770 			return err;
771 		err = setup_rss(adapter);
772 		if (err) {
773 			t4vf_free_sge_resources(adapter);
774 			return err;
775 		}
776 
777 		if (adapter->flags & CXGB4VF_USING_MSIX)
778 			name_msix_vecs(adapter);
779 
780 		adapter->flags |= CXGB4VF_FULL_INIT_DONE;
781 	}
782 
783 	/*
784 	 * Acquire our interrupt resources.  We only support MSI-X and MSI.
785 	 */
786 	BUG_ON((adapter->flags &
787 	       (CXGB4VF_USING_MSIX | CXGB4VF_USING_MSI)) == 0);
788 	if (adapter->flags & CXGB4VF_USING_MSIX)
789 		err = request_msix_queue_irqs(adapter);
790 	else
791 		err = request_irq(adapter->pdev->irq,
792 				  t4vf_intr_handler(adapter), 0,
793 				  adapter->name, adapter);
794 	if (err) {
795 		dev_err(adapter->pdev_dev, "request_irq failed, err %d\n",
796 			err);
797 		return err;
798 	}
799 
800 	/*
801 	 * Enable NAPI ingress processing and return success.
802 	 */
803 	enable_rx(adapter);
804 	t4vf_sge_start(adapter);
805 
806 	return 0;
807 }
808 
809 /*
810  * Bring the adapter down.  Called whenever the last "port" (Virtual
811  * Interface) closed.  (Note that this routine is called "cxgb_down" in the PF
812  * Driver.)
813  */
adapter_down(struct adapter * adapter)814 static void adapter_down(struct adapter *adapter)
815 {
816 	/*
817 	 * Free interrupt resources.
818 	 */
819 	if (adapter->flags & CXGB4VF_USING_MSIX)
820 		free_msix_queue_irqs(adapter);
821 	else
822 		free_irq(adapter->pdev->irq, adapter);
823 
824 	/*
825 	 * Wait for NAPI handlers to finish.
826 	 */
827 	quiesce_rx(adapter);
828 }
829 
830 /*
831  * Start up a net device.
832  */
cxgb4vf_open(struct net_device * dev)833 static int cxgb4vf_open(struct net_device *dev)
834 {
835 	int err;
836 	struct port_info *pi = netdev_priv(dev);
837 	struct adapter *adapter = pi->adapter;
838 
839 	/*
840 	 * If we don't have a connection to the firmware there's nothing we
841 	 * can do.
842 	 */
843 	if (!(adapter->flags & CXGB4VF_FW_OK))
844 		return -ENXIO;
845 
846 	/*
847 	 * If this is the first interface that we're opening on the "adapter",
848 	 * bring the "adapter" up now.
849 	 */
850 	if (adapter->open_device_map == 0) {
851 		err = adapter_up(adapter);
852 		if (err)
853 			return err;
854 	}
855 
856 	/* It's possible that the basic port information could have
857 	 * changed since we first read it.
858 	 */
859 	err = t4vf_update_port_info(pi);
860 	if (err < 0)
861 		goto err_unwind;
862 
863 	/*
864 	 * Note that this interface is up and start everything up ...
865 	 */
866 	err = link_start(dev);
867 	if (err)
868 		goto err_unwind;
869 
870 	pi->vlan_id = t4vf_get_vf_vlan_acl(adapter);
871 
872 	netif_tx_start_all_queues(dev);
873 	set_bit(pi->port_id, &adapter->open_device_map);
874 	return 0;
875 
876 err_unwind:
877 	if (adapter->open_device_map == 0)
878 		adapter_down(adapter);
879 	return err;
880 }
881 
882 /*
883  * Shut down a net device.  This routine is called "cxgb_close" in the PF
884  * Driver ...
885  */
cxgb4vf_stop(struct net_device * dev)886 static int cxgb4vf_stop(struct net_device *dev)
887 {
888 	struct port_info *pi = netdev_priv(dev);
889 	struct adapter *adapter = pi->adapter;
890 
891 	netif_tx_stop_all_queues(dev);
892 	netif_carrier_off(dev);
893 	t4vf_enable_pi(adapter, pi, false, false);
894 
895 	clear_bit(pi->port_id, &adapter->open_device_map);
896 	if (adapter->open_device_map == 0)
897 		adapter_down(adapter);
898 	return 0;
899 }
900 
901 /*
902  * Translate our basic statistics into the standard "ifconfig" statistics.
903  */
cxgb4vf_get_stats(struct net_device * dev)904 static struct net_device_stats *cxgb4vf_get_stats(struct net_device *dev)
905 {
906 	struct t4vf_port_stats stats;
907 	struct port_info *pi = netdev2pinfo(dev);
908 	struct adapter *adapter = pi->adapter;
909 	struct net_device_stats *ns = &dev->stats;
910 	int err;
911 
912 	spin_lock(&adapter->stats_lock);
913 	err = t4vf_get_port_stats(adapter, pi->pidx, &stats);
914 	spin_unlock(&adapter->stats_lock);
915 
916 	memset(ns, 0, sizeof(*ns));
917 	if (err)
918 		return ns;
919 
920 	ns->tx_bytes = (stats.tx_bcast_bytes + stats.tx_mcast_bytes +
921 			stats.tx_ucast_bytes + stats.tx_offload_bytes);
922 	ns->tx_packets = (stats.tx_bcast_frames + stats.tx_mcast_frames +
923 			  stats.tx_ucast_frames + stats.tx_offload_frames);
924 	ns->rx_bytes = (stats.rx_bcast_bytes + stats.rx_mcast_bytes +
925 			stats.rx_ucast_bytes);
926 	ns->rx_packets = (stats.rx_bcast_frames + stats.rx_mcast_frames +
927 			  stats.rx_ucast_frames);
928 	ns->multicast = stats.rx_mcast_frames;
929 	ns->tx_errors = stats.tx_drop_frames;
930 	ns->rx_errors = stats.rx_err_frames;
931 
932 	return ns;
933 }
934 
cxgb4vf_mac_sync(struct net_device * netdev,const u8 * mac_addr)935 static int cxgb4vf_mac_sync(struct net_device *netdev, const u8 *mac_addr)
936 {
937 	struct port_info *pi = netdev_priv(netdev);
938 	struct adapter *adapter = pi->adapter;
939 	int ret;
940 	u64 mhash = 0;
941 	u64 uhash = 0;
942 	bool free = false;
943 	bool ucast = is_unicast_ether_addr(mac_addr);
944 	const u8 *maclist[1] = {mac_addr};
945 	struct hash_mac_addr *new_entry;
946 
947 	ret = t4vf_alloc_mac_filt(adapter, pi->viid, free, 1, maclist,
948 				  NULL, ucast ? &uhash : &mhash, false);
949 	if (ret < 0)
950 		goto out;
951 	/* if hash != 0, then add the addr to hash addr list
952 	 * so on the end we will calculate the hash for the
953 	 * list and program it
954 	 */
955 	if (uhash || mhash) {
956 		new_entry = kzalloc(sizeof(*new_entry), GFP_ATOMIC);
957 		if (!new_entry)
958 			return -ENOMEM;
959 		ether_addr_copy(new_entry->addr, mac_addr);
960 		list_add_tail(&new_entry->list, &adapter->mac_hlist);
961 		ret = cxgb4vf_set_addr_hash(pi);
962 	}
963 out:
964 	return ret < 0 ? ret : 0;
965 }
966 
cxgb4vf_mac_unsync(struct net_device * netdev,const u8 * mac_addr)967 static int cxgb4vf_mac_unsync(struct net_device *netdev, const u8 *mac_addr)
968 {
969 	struct port_info *pi = netdev_priv(netdev);
970 	struct adapter *adapter = pi->adapter;
971 	int ret;
972 	const u8 *maclist[1] = {mac_addr};
973 	struct hash_mac_addr *entry, *tmp;
974 
975 	/* If the MAC address to be removed is in the hash addr
976 	 * list, delete it from the list and update hash vector
977 	 */
978 	list_for_each_entry_safe(entry, tmp, &adapter->mac_hlist, list) {
979 		if (ether_addr_equal(entry->addr, mac_addr)) {
980 			list_del(&entry->list);
981 			kfree(entry);
982 			return cxgb4vf_set_addr_hash(pi);
983 		}
984 	}
985 
986 	ret = t4vf_free_mac_filt(adapter, pi->viid, 1, maclist, false);
987 	return ret < 0 ? -EINVAL : 0;
988 }
989 
990 /*
991  * Set RX properties of a port, such as promiscruity, address filters, and MTU.
992  * If @mtu is -1 it is left unchanged.
993  */
set_rxmode(struct net_device * dev,int mtu,bool sleep_ok)994 static int set_rxmode(struct net_device *dev, int mtu, bool sleep_ok)
995 {
996 	struct port_info *pi = netdev_priv(dev);
997 
998 	__dev_uc_sync(dev, cxgb4vf_mac_sync, cxgb4vf_mac_unsync);
999 	__dev_mc_sync(dev, cxgb4vf_mac_sync, cxgb4vf_mac_unsync);
1000 	return t4vf_set_rxmode(pi->adapter, pi->viid, -1,
1001 			       (dev->flags & IFF_PROMISC) != 0,
1002 			       (dev->flags & IFF_ALLMULTI) != 0,
1003 			       1, -1, sleep_ok);
1004 }
1005 
1006 /*
1007  * Set the current receive modes on the device.
1008  */
cxgb4vf_set_rxmode(struct net_device * dev)1009 static void cxgb4vf_set_rxmode(struct net_device *dev)
1010 {
1011 	/* unfortunately we can't return errors to the stack */
1012 	set_rxmode(dev, -1, false);
1013 }
1014 
1015 /*
1016  * Find the entry in the interrupt holdoff timer value array which comes
1017  * closest to the specified interrupt holdoff value.
1018  */
closest_timer(const struct sge * s,int us)1019 static int closest_timer(const struct sge *s, int us)
1020 {
1021 	int i, timer_idx = 0, min_delta = INT_MAX;
1022 
1023 	for (i = 0; i < ARRAY_SIZE(s->timer_val); i++) {
1024 		int delta = us - s->timer_val[i];
1025 		if (delta < 0)
1026 			delta = -delta;
1027 		if (delta < min_delta) {
1028 			min_delta = delta;
1029 			timer_idx = i;
1030 		}
1031 	}
1032 	return timer_idx;
1033 }
1034 
closest_thres(const struct sge * s,int thres)1035 static int closest_thres(const struct sge *s, int thres)
1036 {
1037 	int i, delta, pktcnt_idx = 0, min_delta = INT_MAX;
1038 
1039 	for (i = 0; i < ARRAY_SIZE(s->counter_val); i++) {
1040 		delta = thres - s->counter_val[i];
1041 		if (delta < 0)
1042 			delta = -delta;
1043 		if (delta < min_delta) {
1044 			min_delta = delta;
1045 			pktcnt_idx = i;
1046 		}
1047 	}
1048 	return pktcnt_idx;
1049 }
1050 
1051 /*
1052  * Return a queue's interrupt hold-off time in us.  0 means no timer.
1053  */
qtimer_val(const struct adapter * adapter,const struct sge_rspq * rspq)1054 static unsigned int qtimer_val(const struct adapter *adapter,
1055 			       const struct sge_rspq *rspq)
1056 {
1057 	unsigned int timer_idx = QINTR_TIMER_IDX_G(rspq->intr_params);
1058 
1059 	return timer_idx < SGE_NTIMERS
1060 		? adapter->sge.timer_val[timer_idx]
1061 		: 0;
1062 }
1063 
1064 /**
1065  *	set_rxq_intr_params - set a queue's interrupt holdoff parameters
1066  *	@adapter: the adapter
1067  *	@rspq: the RX response queue
1068  *	@us: the hold-off time in us, or 0 to disable timer
1069  *	@cnt: the hold-off packet count, or 0 to disable counter
1070  *
1071  *	Sets an RX response queue's interrupt hold-off time and packet count.
1072  *	At least one of the two needs to be enabled for the queue to generate
1073  *	interrupts.
1074  */
set_rxq_intr_params(struct adapter * adapter,struct sge_rspq * rspq,unsigned int us,unsigned int cnt)1075 static int set_rxq_intr_params(struct adapter *adapter, struct sge_rspq *rspq,
1076 			       unsigned int us, unsigned int cnt)
1077 {
1078 	unsigned int timer_idx;
1079 
1080 	/*
1081 	 * If both the interrupt holdoff timer and count are specified as
1082 	 * zero, default to a holdoff count of 1 ...
1083 	 */
1084 	if ((us | cnt) == 0)
1085 		cnt = 1;
1086 
1087 	/*
1088 	 * If an interrupt holdoff count has been specified, then find the
1089 	 * closest configured holdoff count and use that.  If the response
1090 	 * queue has already been created, then update its queue context
1091 	 * parameters ...
1092 	 */
1093 	if (cnt) {
1094 		int err;
1095 		u32 v, pktcnt_idx;
1096 
1097 		pktcnt_idx = closest_thres(&adapter->sge, cnt);
1098 		if (rspq->desc && rspq->pktcnt_idx != pktcnt_idx) {
1099 			v = FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ) |
1100 			    FW_PARAMS_PARAM_X_V(
1101 					FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH) |
1102 			    FW_PARAMS_PARAM_YZ_V(rspq->cntxt_id);
1103 			err = t4vf_set_params(adapter, 1, &v, &pktcnt_idx);
1104 			if (err)
1105 				return err;
1106 		}
1107 		rspq->pktcnt_idx = pktcnt_idx;
1108 	}
1109 
1110 	/*
1111 	 * Compute the closest holdoff timer index from the supplied holdoff
1112 	 * timer value.
1113 	 */
1114 	timer_idx = (us == 0
1115 		     ? SGE_TIMER_RSTRT_CNTR
1116 		     : closest_timer(&adapter->sge, us));
1117 
1118 	/*
1119 	 * Update the response queue's interrupt coalescing parameters and
1120 	 * return success.
1121 	 */
1122 	rspq->intr_params = (QINTR_TIMER_IDX_V(timer_idx) |
1123 			     QINTR_CNT_EN_V(cnt > 0));
1124 	return 0;
1125 }
1126 
1127 /*
1128  * Return a version number to identify the type of adapter.  The scheme is:
1129  * - bits 0..9: chip version
1130  * - bits 10..15: chip revision
1131  */
mk_adap_vers(const struct adapter * adapter)1132 static inline unsigned int mk_adap_vers(const struct adapter *adapter)
1133 {
1134 	/*
1135 	 * Chip version 4, revision 0x3f (cxgb4vf).
1136 	 */
1137 	return CHELSIO_CHIP_VERSION(adapter->params.chip) | (0x3f << 10);
1138 }
1139 
1140 /*
1141  * Execute the specified ioctl command.
1142  */
cxgb4vf_do_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)1143 static int cxgb4vf_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1144 {
1145 	int ret = 0;
1146 
1147 	switch (cmd) {
1148 	    /*
1149 	     * The VF Driver doesn't have access to any of the other
1150 	     * common Ethernet device ioctl()'s (like reading/writing
1151 	     * PHY registers, etc.
1152 	     */
1153 
1154 	default:
1155 		ret = -EOPNOTSUPP;
1156 		break;
1157 	}
1158 	return ret;
1159 }
1160 
1161 /*
1162  * Change the device's MTU.
1163  */
cxgb4vf_change_mtu(struct net_device * dev,int new_mtu)1164 static int cxgb4vf_change_mtu(struct net_device *dev, int new_mtu)
1165 {
1166 	int ret;
1167 	struct port_info *pi = netdev_priv(dev);
1168 
1169 	ret = t4vf_set_rxmode(pi->adapter, pi->viid, new_mtu,
1170 			      -1, -1, -1, -1, true);
1171 	if (!ret)
1172 		dev->mtu = new_mtu;
1173 	return ret;
1174 }
1175 
cxgb4vf_fix_features(struct net_device * dev,netdev_features_t features)1176 static netdev_features_t cxgb4vf_fix_features(struct net_device *dev,
1177 	netdev_features_t features)
1178 {
1179 	/*
1180 	 * Since there is no support for separate rx/tx vlan accel
1181 	 * enable/disable make sure tx flag is always in same state as rx.
1182 	 */
1183 	if (features & NETIF_F_HW_VLAN_CTAG_RX)
1184 		features |= NETIF_F_HW_VLAN_CTAG_TX;
1185 	else
1186 		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1187 
1188 	return features;
1189 }
1190 
cxgb4vf_set_features(struct net_device * dev,netdev_features_t features)1191 static int cxgb4vf_set_features(struct net_device *dev,
1192 	netdev_features_t features)
1193 {
1194 	struct port_info *pi = netdev_priv(dev);
1195 	netdev_features_t changed = dev->features ^ features;
1196 
1197 	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
1198 		t4vf_set_rxmode(pi->adapter, pi->viid, -1, -1, -1, -1,
1199 				features & NETIF_F_HW_VLAN_CTAG_TX, 0);
1200 
1201 	return 0;
1202 }
1203 
1204 /*
1205  * Change the devices MAC address.
1206  */
cxgb4vf_set_mac_addr(struct net_device * dev,void * _addr)1207 static int cxgb4vf_set_mac_addr(struct net_device *dev, void *_addr)
1208 {
1209 	int ret;
1210 	struct sockaddr *addr = _addr;
1211 	struct port_info *pi = netdev_priv(dev);
1212 
1213 	if (!is_valid_ether_addr(addr->sa_data))
1214 		return -EADDRNOTAVAIL;
1215 
1216 	ret = cxgb4vf_change_mac(pi, pi->viid, &pi->xact_addr_filt,
1217 				 addr->sa_data, true);
1218 	if (ret < 0)
1219 		return ret;
1220 
1221 	eth_hw_addr_set(dev, addr->sa_data);
1222 	return 0;
1223 }
1224 
1225 #ifdef CONFIG_NET_POLL_CONTROLLER
1226 /*
1227  * Poll all of our receive queues.  This is called outside of normal interrupt
1228  * context.
1229  */
cxgb4vf_poll_controller(struct net_device * dev)1230 static void cxgb4vf_poll_controller(struct net_device *dev)
1231 {
1232 	struct port_info *pi = netdev_priv(dev);
1233 	struct adapter *adapter = pi->adapter;
1234 
1235 	if (adapter->flags & CXGB4VF_USING_MSIX) {
1236 		struct sge_eth_rxq *rxq;
1237 		int nqsets;
1238 
1239 		rxq = &adapter->sge.ethrxq[pi->first_qset];
1240 		for (nqsets = pi->nqsets; nqsets; nqsets--) {
1241 			t4vf_sge_intr_msix(0, &rxq->rspq);
1242 			rxq++;
1243 		}
1244 	} else
1245 		t4vf_intr_handler(adapter)(0, adapter);
1246 }
1247 #endif
1248 
1249 /*
1250  * Ethtool operations.
1251  * ===================
1252  *
1253  * Note that we don't support any ethtool operations which change the physical
1254  * state of the port to which we're linked.
1255  */
1256 
1257 /**
1258  *	from_fw_port_mod_type - translate Firmware Port/Module type to Ethtool
1259  *	@port_type: Firmware Port Type
1260  *	@mod_type: Firmware Module Type
1261  *
1262  *	Translate Firmware Port/Module type to Ethtool Port Type.
1263  */
from_fw_port_mod_type(enum fw_port_type port_type,enum fw_port_module_type mod_type)1264 static int from_fw_port_mod_type(enum fw_port_type port_type,
1265 				 enum fw_port_module_type mod_type)
1266 {
1267 	if (port_type == FW_PORT_TYPE_BT_SGMII ||
1268 	    port_type == FW_PORT_TYPE_BT_XFI ||
1269 	    port_type == FW_PORT_TYPE_BT_XAUI) {
1270 		return PORT_TP;
1271 	} else if (port_type == FW_PORT_TYPE_FIBER_XFI ||
1272 		   port_type == FW_PORT_TYPE_FIBER_XAUI) {
1273 		return PORT_FIBRE;
1274 	} else if (port_type == FW_PORT_TYPE_SFP ||
1275 		   port_type == FW_PORT_TYPE_QSFP_10G ||
1276 		   port_type == FW_PORT_TYPE_QSA ||
1277 		   port_type == FW_PORT_TYPE_QSFP ||
1278 		   port_type == FW_PORT_TYPE_CR4_QSFP ||
1279 		   port_type == FW_PORT_TYPE_CR_QSFP ||
1280 		   port_type == FW_PORT_TYPE_CR2_QSFP ||
1281 		   port_type == FW_PORT_TYPE_SFP28) {
1282 		if (mod_type == FW_PORT_MOD_TYPE_LR ||
1283 		    mod_type == FW_PORT_MOD_TYPE_SR ||
1284 		    mod_type == FW_PORT_MOD_TYPE_ER ||
1285 		    mod_type == FW_PORT_MOD_TYPE_LRM)
1286 			return PORT_FIBRE;
1287 		else if (mod_type == FW_PORT_MOD_TYPE_TWINAX_PASSIVE ||
1288 			 mod_type == FW_PORT_MOD_TYPE_TWINAX_ACTIVE)
1289 			return PORT_DA;
1290 		else
1291 			return PORT_OTHER;
1292 	} else if (port_type == FW_PORT_TYPE_KR4_100G ||
1293 		   port_type == FW_PORT_TYPE_KR_SFP28 ||
1294 		   port_type == FW_PORT_TYPE_KR_XLAUI) {
1295 		return PORT_NONE;
1296 	}
1297 
1298 	return PORT_OTHER;
1299 }
1300 
1301 /**
1302  *	fw_caps_to_lmm - translate Firmware to ethtool Link Mode Mask
1303  *	@port_type: Firmware Port Type
1304  *	@fw_caps: Firmware Port Capabilities
1305  *	@link_mode_mask: ethtool Link Mode Mask
1306  *
1307  *	Translate a Firmware Port Capabilities specification to an ethtool
1308  *	Link Mode Mask.
1309  */
fw_caps_to_lmm(enum fw_port_type port_type,unsigned int fw_caps,unsigned long * link_mode_mask)1310 static void fw_caps_to_lmm(enum fw_port_type port_type,
1311 			   unsigned int fw_caps,
1312 			   unsigned long *link_mode_mask)
1313 {
1314 	#define SET_LMM(__lmm_name) \
1315 		__set_bit(ETHTOOL_LINK_MODE_ ## __lmm_name ## _BIT, \
1316 			  link_mode_mask)
1317 
1318 	#define FW_CAPS_TO_LMM(__fw_name, __lmm_name) \
1319 		do { \
1320 			if (fw_caps & FW_PORT_CAP32_ ## __fw_name) \
1321 				SET_LMM(__lmm_name); \
1322 		} while (0)
1323 
1324 	switch (port_type) {
1325 	case FW_PORT_TYPE_BT_SGMII:
1326 	case FW_PORT_TYPE_BT_XFI:
1327 	case FW_PORT_TYPE_BT_XAUI:
1328 		SET_LMM(TP);
1329 		FW_CAPS_TO_LMM(SPEED_100M, 100baseT_Full);
1330 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
1331 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
1332 		break;
1333 
1334 	case FW_PORT_TYPE_KX4:
1335 	case FW_PORT_TYPE_KX:
1336 		SET_LMM(Backplane);
1337 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseKX_Full);
1338 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKX4_Full);
1339 		break;
1340 
1341 	case FW_PORT_TYPE_KR:
1342 		SET_LMM(Backplane);
1343 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1344 		break;
1345 
1346 	case FW_PORT_TYPE_BP_AP:
1347 		SET_LMM(Backplane);
1348 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseKX_Full);
1349 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseR_FEC);
1350 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1351 		break;
1352 
1353 	case FW_PORT_TYPE_BP4_AP:
1354 		SET_LMM(Backplane);
1355 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseKX_Full);
1356 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseR_FEC);
1357 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1358 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKX4_Full);
1359 		break;
1360 
1361 	case FW_PORT_TYPE_FIBER_XFI:
1362 	case FW_PORT_TYPE_FIBER_XAUI:
1363 	case FW_PORT_TYPE_SFP:
1364 	case FW_PORT_TYPE_QSFP_10G:
1365 	case FW_PORT_TYPE_QSA:
1366 		SET_LMM(FIBRE);
1367 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
1368 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
1369 		break;
1370 
1371 	case FW_PORT_TYPE_BP40_BA:
1372 	case FW_PORT_TYPE_QSFP:
1373 		SET_LMM(FIBRE);
1374 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
1375 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
1376 		FW_CAPS_TO_LMM(SPEED_40G, 40000baseSR4_Full);
1377 		break;
1378 
1379 	case FW_PORT_TYPE_CR_QSFP:
1380 	case FW_PORT_TYPE_SFP28:
1381 		SET_LMM(FIBRE);
1382 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
1383 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseT_Full);
1384 		FW_CAPS_TO_LMM(SPEED_25G, 25000baseCR_Full);
1385 		break;
1386 
1387 	case FW_PORT_TYPE_KR_SFP28:
1388 		SET_LMM(Backplane);
1389 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseT_Full);
1390 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1391 		FW_CAPS_TO_LMM(SPEED_25G, 25000baseKR_Full);
1392 		break;
1393 
1394 	case FW_PORT_TYPE_KR_XLAUI:
1395 		SET_LMM(Backplane);
1396 		FW_CAPS_TO_LMM(SPEED_1G, 1000baseKX_Full);
1397 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1398 		FW_CAPS_TO_LMM(SPEED_40G, 40000baseKR4_Full);
1399 		break;
1400 
1401 	case FW_PORT_TYPE_CR2_QSFP:
1402 		SET_LMM(FIBRE);
1403 		FW_CAPS_TO_LMM(SPEED_50G, 50000baseSR2_Full);
1404 		break;
1405 
1406 	case FW_PORT_TYPE_KR4_100G:
1407 	case FW_PORT_TYPE_CR4_QSFP:
1408 		SET_LMM(FIBRE);
1409 		FW_CAPS_TO_LMM(SPEED_1G,  1000baseT_Full);
1410 		FW_CAPS_TO_LMM(SPEED_10G, 10000baseKR_Full);
1411 		FW_CAPS_TO_LMM(SPEED_40G, 40000baseSR4_Full);
1412 		FW_CAPS_TO_LMM(SPEED_25G, 25000baseCR_Full);
1413 		FW_CAPS_TO_LMM(SPEED_50G, 50000baseCR2_Full);
1414 		FW_CAPS_TO_LMM(SPEED_100G, 100000baseCR4_Full);
1415 		break;
1416 
1417 	default:
1418 		break;
1419 	}
1420 
1421 	if (fw_caps & FW_PORT_CAP32_FEC_V(FW_PORT_CAP32_FEC_M)) {
1422 		FW_CAPS_TO_LMM(FEC_RS, FEC_RS);
1423 		FW_CAPS_TO_LMM(FEC_BASER_RS, FEC_BASER);
1424 	} else {
1425 		SET_LMM(FEC_NONE);
1426 	}
1427 
1428 	FW_CAPS_TO_LMM(ANEG, Autoneg);
1429 	FW_CAPS_TO_LMM(802_3_PAUSE, Pause);
1430 	FW_CAPS_TO_LMM(802_3_ASM_DIR, Asym_Pause);
1431 
1432 	#undef FW_CAPS_TO_LMM
1433 	#undef SET_LMM
1434 }
1435 
cxgb4vf_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * link_ksettings)1436 static int cxgb4vf_get_link_ksettings(struct net_device *dev,
1437 				  struct ethtool_link_ksettings *link_ksettings)
1438 {
1439 	struct port_info *pi = netdev_priv(dev);
1440 	struct ethtool_link_settings *base = &link_ksettings->base;
1441 
1442 	/* For the nonce, the Firmware doesn't send up Port State changes
1443 	 * when the Virtual Interface attached to the Port is down.  So
1444 	 * if it's down, let's grab any changes.
1445 	 */
1446 	if (!netif_running(dev))
1447 		(void)t4vf_update_port_info(pi);
1448 
1449 	ethtool_link_ksettings_zero_link_mode(link_ksettings, supported);
1450 	ethtool_link_ksettings_zero_link_mode(link_ksettings, advertising);
1451 	ethtool_link_ksettings_zero_link_mode(link_ksettings, lp_advertising);
1452 
1453 	base->port = from_fw_port_mod_type(pi->port_type, pi->mod_type);
1454 
1455 	if (pi->mdio_addr >= 0) {
1456 		base->phy_address = pi->mdio_addr;
1457 		base->mdio_support = (pi->port_type == FW_PORT_TYPE_BT_SGMII
1458 				      ? ETH_MDIO_SUPPORTS_C22
1459 				      : ETH_MDIO_SUPPORTS_C45);
1460 	} else {
1461 		base->phy_address = 255;
1462 		base->mdio_support = 0;
1463 	}
1464 
1465 	fw_caps_to_lmm(pi->port_type, pi->link_cfg.pcaps,
1466 		       link_ksettings->link_modes.supported);
1467 	fw_caps_to_lmm(pi->port_type, pi->link_cfg.acaps,
1468 		       link_ksettings->link_modes.advertising);
1469 	fw_caps_to_lmm(pi->port_type, pi->link_cfg.lpacaps,
1470 		       link_ksettings->link_modes.lp_advertising);
1471 
1472 	if (netif_carrier_ok(dev)) {
1473 		base->speed = pi->link_cfg.speed;
1474 		base->duplex = DUPLEX_FULL;
1475 	} else {
1476 		base->speed = SPEED_UNKNOWN;
1477 		base->duplex = DUPLEX_UNKNOWN;
1478 	}
1479 
1480 	base->autoneg = pi->link_cfg.autoneg;
1481 	if (pi->link_cfg.pcaps & FW_PORT_CAP32_ANEG)
1482 		ethtool_link_ksettings_add_link_mode(link_ksettings,
1483 						     supported, Autoneg);
1484 	if (pi->link_cfg.autoneg)
1485 		ethtool_link_ksettings_add_link_mode(link_ksettings,
1486 						     advertising, Autoneg);
1487 
1488 	return 0;
1489 }
1490 
1491 /* Translate the Firmware FEC value into the ethtool value. */
fwcap_to_eth_fec(unsigned int fw_fec)1492 static inline unsigned int fwcap_to_eth_fec(unsigned int fw_fec)
1493 {
1494 	unsigned int eth_fec = 0;
1495 
1496 	if (fw_fec & FW_PORT_CAP32_FEC_RS)
1497 		eth_fec |= ETHTOOL_FEC_RS;
1498 	if (fw_fec & FW_PORT_CAP32_FEC_BASER_RS)
1499 		eth_fec |= ETHTOOL_FEC_BASER;
1500 
1501 	/* if nothing is set, then FEC is off */
1502 	if (!eth_fec)
1503 		eth_fec = ETHTOOL_FEC_OFF;
1504 
1505 	return eth_fec;
1506 }
1507 
1508 /* Translate Common Code FEC value into ethtool value. */
cc_to_eth_fec(unsigned int cc_fec)1509 static inline unsigned int cc_to_eth_fec(unsigned int cc_fec)
1510 {
1511 	unsigned int eth_fec = 0;
1512 
1513 	if (cc_fec & FEC_AUTO)
1514 		eth_fec |= ETHTOOL_FEC_AUTO;
1515 	if (cc_fec & FEC_RS)
1516 		eth_fec |= ETHTOOL_FEC_RS;
1517 	if (cc_fec & FEC_BASER_RS)
1518 		eth_fec |= ETHTOOL_FEC_BASER;
1519 
1520 	/* if nothing is set, then FEC is off */
1521 	if (!eth_fec)
1522 		eth_fec = ETHTOOL_FEC_OFF;
1523 
1524 	return eth_fec;
1525 }
1526 
cxgb4vf_get_fecparam(struct net_device * dev,struct ethtool_fecparam * fec)1527 static int cxgb4vf_get_fecparam(struct net_device *dev,
1528 				struct ethtool_fecparam *fec)
1529 {
1530 	const struct port_info *pi = netdev_priv(dev);
1531 	const struct link_config *lc = &pi->link_cfg;
1532 
1533 	/* Translate the Firmware FEC Support into the ethtool value.  We
1534 	 * always support IEEE 802.3 "automatic" selection of Link FEC type if
1535 	 * any FEC is supported.
1536 	 */
1537 	fec->fec = fwcap_to_eth_fec(lc->pcaps);
1538 	if (fec->fec != ETHTOOL_FEC_OFF)
1539 		fec->fec |= ETHTOOL_FEC_AUTO;
1540 
1541 	/* Translate the current internal FEC parameters into the
1542 	 * ethtool values.
1543 	 */
1544 	fec->active_fec = cc_to_eth_fec(lc->fec);
1545 	return 0;
1546 }
1547 
1548 /*
1549  * Return our driver information.
1550  */
cxgb4vf_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * drvinfo)1551 static void cxgb4vf_get_drvinfo(struct net_device *dev,
1552 				struct ethtool_drvinfo *drvinfo)
1553 {
1554 	struct adapter *adapter = netdev2adap(dev);
1555 
1556 	strscpy(drvinfo->driver, KBUILD_MODNAME, sizeof(drvinfo->driver));
1557 	strscpy(drvinfo->bus_info, pci_name(to_pci_dev(dev->dev.parent)),
1558 		sizeof(drvinfo->bus_info));
1559 	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
1560 		 "%u.%u.%u.%u, TP %u.%u.%u.%u",
1561 		 FW_HDR_FW_VER_MAJOR_G(adapter->params.dev.fwrev),
1562 		 FW_HDR_FW_VER_MINOR_G(adapter->params.dev.fwrev),
1563 		 FW_HDR_FW_VER_MICRO_G(adapter->params.dev.fwrev),
1564 		 FW_HDR_FW_VER_BUILD_G(adapter->params.dev.fwrev),
1565 		 FW_HDR_FW_VER_MAJOR_G(adapter->params.dev.tprev),
1566 		 FW_HDR_FW_VER_MINOR_G(adapter->params.dev.tprev),
1567 		 FW_HDR_FW_VER_MICRO_G(adapter->params.dev.tprev),
1568 		 FW_HDR_FW_VER_BUILD_G(adapter->params.dev.tprev));
1569 }
1570 
1571 /*
1572  * Return current adapter message level.
1573  */
cxgb4vf_get_msglevel(struct net_device * dev)1574 static u32 cxgb4vf_get_msglevel(struct net_device *dev)
1575 {
1576 	return netdev2adap(dev)->msg_enable;
1577 }
1578 
1579 /*
1580  * Set current adapter message level.
1581  */
cxgb4vf_set_msglevel(struct net_device * dev,u32 msglevel)1582 static void cxgb4vf_set_msglevel(struct net_device *dev, u32 msglevel)
1583 {
1584 	netdev2adap(dev)->msg_enable = msglevel;
1585 }
1586 
1587 /*
1588  * Return the device's current Queue Set ring size parameters along with the
1589  * allowed maximum values.  Since ethtool doesn't understand the concept of
1590  * multi-queue devices, we just return the current values associated with the
1591  * first Queue Set.
1592  */
cxgb4vf_get_ringparam(struct net_device * dev,struct ethtool_ringparam * rp,struct kernel_ethtool_ringparam * kernel_rp,struct netlink_ext_ack * extack)1593 static void cxgb4vf_get_ringparam(struct net_device *dev,
1594 				  struct ethtool_ringparam *rp,
1595 				  struct kernel_ethtool_ringparam *kernel_rp,
1596 				  struct netlink_ext_ack *extack)
1597 {
1598 	const struct port_info *pi = netdev_priv(dev);
1599 	const struct sge *s = &pi->adapter->sge;
1600 
1601 	rp->rx_max_pending = MAX_RX_BUFFERS;
1602 	rp->rx_mini_max_pending = MAX_RSPQ_ENTRIES;
1603 	rp->rx_jumbo_max_pending = 0;
1604 	rp->tx_max_pending = MAX_TXQ_ENTRIES;
1605 
1606 	rp->rx_pending = s->ethrxq[pi->first_qset].fl.size - MIN_FL_RESID;
1607 	rp->rx_mini_pending = s->ethrxq[pi->first_qset].rspq.size;
1608 	rp->rx_jumbo_pending = 0;
1609 	rp->tx_pending = s->ethtxq[pi->first_qset].q.size;
1610 }
1611 
1612 /*
1613  * Set the Queue Set ring size parameters for the device.  Again, since
1614  * ethtool doesn't allow for the concept of multiple queues per device, we'll
1615  * apply these new values across all of the Queue Sets associated with the
1616  * device -- after vetting them of course!
1617  */
cxgb4vf_set_ringparam(struct net_device * dev,struct ethtool_ringparam * rp,struct kernel_ethtool_ringparam * kernel_rp,struct netlink_ext_ack * extack)1618 static int cxgb4vf_set_ringparam(struct net_device *dev,
1619 				 struct ethtool_ringparam *rp,
1620 				 struct kernel_ethtool_ringparam *kernel_rp,
1621 				 struct netlink_ext_ack *extack)
1622 {
1623 	const struct port_info *pi = netdev_priv(dev);
1624 	struct adapter *adapter = pi->adapter;
1625 	struct sge *s = &adapter->sge;
1626 	int qs;
1627 
1628 	if (rp->rx_pending > MAX_RX_BUFFERS ||
1629 	    rp->rx_jumbo_pending ||
1630 	    rp->tx_pending > MAX_TXQ_ENTRIES ||
1631 	    rp->rx_mini_pending > MAX_RSPQ_ENTRIES ||
1632 	    rp->rx_mini_pending < MIN_RSPQ_ENTRIES ||
1633 	    rp->rx_pending < MIN_FL_ENTRIES ||
1634 	    rp->tx_pending < MIN_TXQ_ENTRIES)
1635 		return -EINVAL;
1636 
1637 	if (adapter->flags & CXGB4VF_FULL_INIT_DONE)
1638 		return -EBUSY;
1639 
1640 	for (qs = pi->first_qset; qs < pi->first_qset + pi->nqsets; qs++) {
1641 		s->ethrxq[qs].fl.size = rp->rx_pending + MIN_FL_RESID;
1642 		s->ethrxq[qs].rspq.size = rp->rx_mini_pending;
1643 		s->ethtxq[qs].q.size = rp->tx_pending;
1644 	}
1645 	return 0;
1646 }
1647 
1648 /*
1649  * Return the interrupt holdoff timer and count for the first Queue Set on the
1650  * device.  Our extension ioctl() (the cxgbtool interface) allows the
1651  * interrupt holdoff timer to be read on all of the device's Queue Sets.
1652  */
cxgb4vf_get_coalesce(struct net_device * dev,struct ethtool_coalesce * coalesce,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)1653 static int cxgb4vf_get_coalesce(struct net_device *dev,
1654 				struct ethtool_coalesce *coalesce,
1655 				struct kernel_ethtool_coalesce *kernel_coal,
1656 				struct netlink_ext_ack *extack)
1657 {
1658 	const struct port_info *pi = netdev_priv(dev);
1659 	const struct adapter *adapter = pi->adapter;
1660 	const struct sge_rspq *rspq = &adapter->sge.ethrxq[pi->first_qset].rspq;
1661 
1662 	coalesce->rx_coalesce_usecs = qtimer_val(adapter, rspq);
1663 	coalesce->rx_max_coalesced_frames =
1664 		((rspq->intr_params & QINTR_CNT_EN_F)
1665 		 ? adapter->sge.counter_val[rspq->pktcnt_idx]
1666 		 : 0);
1667 	return 0;
1668 }
1669 
1670 /*
1671  * Set the RX interrupt holdoff timer and count for the first Queue Set on the
1672  * interface.  Our extension ioctl() (the cxgbtool interface) allows us to set
1673  * the interrupt holdoff timer on any of the device's Queue Sets.
1674  */
cxgb4vf_set_coalesce(struct net_device * dev,struct ethtool_coalesce * coalesce,struct kernel_ethtool_coalesce * kernel_coal,struct netlink_ext_ack * extack)1675 static int cxgb4vf_set_coalesce(struct net_device *dev,
1676 				struct ethtool_coalesce *coalesce,
1677 				struct kernel_ethtool_coalesce *kernel_coal,
1678 				struct netlink_ext_ack *extack)
1679 {
1680 	const struct port_info *pi = netdev_priv(dev);
1681 	struct adapter *adapter = pi->adapter;
1682 
1683 	return set_rxq_intr_params(adapter,
1684 				   &adapter->sge.ethrxq[pi->first_qset].rspq,
1685 				   coalesce->rx_coalesce_usecs,
1686 				   coalesce->rx_max_coalesced_frames);
1687 }
1688 
1689 /*
1690  * Report current port link pause parameter settings.
1691  */
cxgb4vf_get_pauseparam(struct net_device * dev,struct ethtool_pauseparam * pauseparam)1692 static void cxgb4vf_get_pauseparam(struct net_device *dev,
1693 				   struct ethtool_pauseparam *pauseparam)
1694 {
1695 	struct port_info *pi = netdev_priv(dev);
1696 
1697 	pauseparam->autoneg = (pi->link_cfg.requested_fc & PAUSE_AUTONEG) != 0;
1698 	pauseparam->rx_pause = (pi->link_cfg.advertised_fc & PAUSE_RX) != 0;
1699 	pauseparam->tx_pause = (pi->link_cfg.advertised_fc & PAUSE_TX) != 0;
1700 }
1701 
1702 /*
1703  * Identify the port by blinking the port's LED.
1704  */
cxgb4vf_phys_id(struct net_device * dev,enum ethtool_phys_id_state state)1705 static int cxgb4vf_phys_id(struct net_device *dev,
1706 			   enum ethtool_phys_id_state state)
1707 {
1708 	unsigned int val;
1709 	struct port_info *pi = netdev_priv(dev);
1710 
1711 	if (state == ETHTOOL_ID_ACTIVE)
1712 		val = 0xffff;
1713 	else if (state == ETHTOOL_ID_INACTIVE)
1714 		val = 0;
1715 	else
1716 		return -EINVAL;
1717 
1718 	return t4vf_identify_port(pi->adapter, pi->viid, val);
1719 }
1720 
1721 /*
1722  * Port stats maintained per queue of the port.
1723  */
1724 struct queue_port_stats {
1725 	u64 tso;
1726 	u64 tx_csum;
1727 	u64 rx_csum;
1728 	u64 vlan_ex;
1729 	u64 vlan_ins;
1730 	u64 lro_pkts;
1731 	u64 lro_merged;
1732 };
1733 
1734 /*
1735  * Strings for the ETH_SS_STATS statistics set ("ethtool -S").  Note that
1736  * these need to match the order of statistics returned by
1737  * t4vf_get_port_stats().
1738  */
1739 static const char stats_strings[][ETH_GSTRING_LEN] = {
1740 	/*
1741 	 * These must match the layout of the t4vf_port_stats structure.
1742 	 */
1743 	"TxBroadcastBytes  ",
1744 	"TxBroadcastFrames ",
1745 	"TxMulticastBytes  ",
1746 	"TxMulticastFrames ",
1747 	"TxUnicastBytes    ",
1748 	"TxUnicastFrames   ",
1749 	"TxDroppedFrames   ",
1750 	"TxOffloadBytes    ",
1751 	"TxOffloadFrames   ",
1752 	"RxBroadcastBytes  ",
1753 	"RxBroadcastFrames ",
1754 	"RxMulticastBytes  ",
1755 	"RxMulticastFrames ",
1756 	"RxUnicastBytes    ",
1757 	"RxUnicastFrames   ",
1758 	"RxErrorFrames     ",
1759 
1760 	/*
1761 	 * These are accumulated per-queue statistics and must match the
1762 	 * order of the fields in the queue_port_stats structure.
1763 	 */
1764 	"TSO               ",
1765 	"TxCsumOffload     ",
1766 	"RxCsumGood        ",
1767 	"VLANextractions   ",
1768 	"VLANinsertions    ",
1769 	"GROPackets        ",
1770 	"GROMerged         ",
1771 };
1772 
1773 /*
1774  * Return the number of statistics in the specified statistics set.
1775  */
cxgb4vf_get_sset_count(struct net_device * dev,int sset)1776 static int cxgb4vf_get_sset_count(struct net_device *dev, int sset)
1777 {
1778 	switch (sset) {
1779 	case ETH_SS_STATS:
1780 		return ARRAY_SIZE(stats_strings);
1781 	default:
1782 		return -EOPNOTSUPP;
1783 	}
1784 	/*NOTREACHED*/
1785 }
1786 
1787 /*
1788  * Return the strings for the specified statistics set.
1789  */
cxgb4vf_get_strings(struct net_device * dev,u32 sset,u8 * data)1790 static void cxgb4vf_get_strings(struct net_device *dev,
1791 				u32 sset,
1792 				u8 *data)
1793 {
1794 	switch (sset) {
1795 	case ETH_SS_STATS:
1796 		memcpy(data, stats_strings, sizeof(stats_strings));
1797 		break;
1798 	}
1799 }
1800 
1801 /*
1802  * Small utility routine to accumulate queue statistics across the queues of
1803  * a "port".
1804  */
collect_sge_port_stats(const struct adapter * adapter,const struct port_info * pi,struct queue_port_stats * stats)1805 static void collect_sge_port_stats(const struct adapter *adapter,
1806 				   const struct port_info *pi,
1807 				   struct queue_port_stats *stats)
1808 {
1809 	const struct sge_eth_txq *txq = &adapter->sge.ethtxq[pi->first_qset];
1810 	const struct sge_eth_rxq *rxq = &adapter->sge.ethrxq[pi->first_qset];
1811 	int qs;
1812 
1813 	memset(stats, 0, sizeof(*stats));
1814 	for (qs = 0; qs < pi->nqsets; qs++, rxq++, txq++) {
1815 		stats->tso += txq->tso;
1816 		stats->tx_csum += txq->tx_cso;
1817 		stats->rx_csum += rxq->stats.rx_cso;
1818 		stats->vlan_ex += rxq->stats.vlan_ex;
1819 		stats->vlan_ins += txq->vlan_ins;
1820 		stats->lro_pkts += rxq->stats.lro_pkts;
1821 		stats->lro_merged += rxq->stats.lro_merged;
1822 	}
1823 }
1824 
1825 /*
1826  * Return the ETH_SS_STATS statistics set.
1827  */
cxgb4vf_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)1828 static void cxgb4vf_get_ethtool_stats(struct net_device *dev,
1829 				      struct ethtool_stats *stats,
1830 				      u64 *data)
1831 {
1832 	struct port_info *pi = netdev2pinfo(dev);
1833 	struct adapter *adapter = pi->adapter;
1834 	int err = t4vf_get_port_stats(adapter, pi->pidx,
1835 				      (struct t4vf_port_stats *)data);
1836 	if (err)
1837 		memset(data, 0, sizeof(struct t4vf_port_stats));
1838 
1839 	data += sizeof(struct t4vf_port_stats) / sizeof(u64);
1840 	collect_sge_port_stats(adapter, pi, (struct queue_port_stats *)data);
1841 }
1842 
1843 /*
1844  * Return the size of our register map.
1845  */
cxgb4vf_get_regs_len(struct net_device * dev)1846 static int cxgb4vf_get_regs_len(struct net_device *dev)
1847 {
1848 	return T4VF_REGMAP_SIZE;
1849 }
1850 
1851 /*
1852  * Dump a block of registers, start to end inclusive, into a buffer.
1853  */
reg_block_dump(struct adapter * adapter,void * regbuf,unsigned int start,unsigned int end)1854 static void reg_block_dump(struct adapter *adapter, void *regbuf,
1855 			   unsigned int start, unsigned int end)
1856 {
1857 	u32 *bp = regbuf + start - T4VF_REGMAP_START;
1858 
1859 	for ( ; start <= end; start += sizeof(u32)) {
1860 		/*
1861 		 * Avoid reading the Mailbox Control register since that
1862 		 * can trigger a Mailbox Ownership Arbitration cycle and
1863 		 * interfere with communication with the firmware.
1864 		 */
1865 		if (start == T4VF_CIM_BASE_ADDR + CIM_VF_EXT_MAILBOX_CTRL)
1866 			*bp++ = 0xffff;
1867 		else
1868 			*bp++ = t4_read_reg(adapter, start);
1869 	}
1870 }
1871 
1872 /*
1873  * Copy our entire register map into the provided buffer.
1874  */
cxgb4vf_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * regbuf)1875 static void cxgb4vf_get_regs(struct net_device *dev,
1876 			     struct ethtool_regs *regs,
1877 			     void *regbuf)
1878 {
1879 	struct adapter *adapter = netdev2adap(dev);
1880 
1881 	regs->version = mk_adap_vers(adapter);
1882 
1883 	/*
1884 	 * Fill in register buffer with our register map.
1885 	 */
1886 	memset(regbuf, 0, T4VF_REGMAP_SIZE);
1887 
1888 	reg_block_dump(adapter, regbuf,
1889 		       T4VF_SGE_BASE_ADDR + T4VF_MOD_MAP_SGE_FIRST,
1890 		       T4VF_SGE_BASE_ADDR + T4VF_MOD_MAP_SGE_LAST);
1891 	reg_block_dump(adapter, regbuf,
1892 		       T4VF_MPS_BASE_ADDR + T4VF_MOD_MAP_MPS_FIRST,
1893 		       T4VF_MPS_BASE_ADDR + T4VF_MOD_MAP_MPS_LAST);
1894 
1895 	/* T5 adds new registers in the PL Register map.
1896 	 */
1897 	reg_block_dump(adapter, regbuf,
1898 		       T4VF_PL_BASE_ADDR + T4VF_MOD_MAP_PL_FIRST,
1899 		       T4VF_PL_BASE_ADDR + (is_t4(adapter->params.chip)
1900 		       ? PL_VF_WHOAMI_A : PL_VF_REVISION_A));
1901 	reg_block_dump(adapter, regbuf,
1902 		       T4VF_CIM_BASE_ADDR + T4VF_MOD_MAP_CIM_FIRST,
1903 		       T4VF_CIM_BASE_ADDR + T4VF_MOD_MAP_CIM_LAST);
1904 
1905 	reg_block_dump(adapter, regbuf,
1906 		       T4VF_MBDATA_BASE_ADDR + T4VF_MBDATA_FIRST,
1907 		       T4VF_MBDATA_BASE_ADDR + T4VF_MBDATA_LAST);
1908 }
1909 
1910 /*
1911  * Report current Wake On LAN settings.
1912  */
cxgb4vf_get_wol(struct net_device * dev,struct ethtool_wolinfo * wol)1913 static void cxgb4vf_get_wol(struct net_device *dev,
1914 			    struct ethtool_wolinfo *wol)
1915 {
1916 	wol->supported = 0;
1917 	wol->wolopts = 0;
1918 	memset(&wol->sopass, 0, sizeof(wol->sopass));
1919 }
1920 
1921 /*
1922  * TCP Segmentation Offload flags which we support.
1923  */
1924 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1925 #define VLAN_FEAT (NETIF_F_SG | NETIF_F_IP_CSUM | TSO_FLAGS | \
1926 		   NETIF_F_GRO | NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA)
1927 
1928 static const struct ethtool_ops cxgb4vf_ethtool_ops = {
1929 	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS |
1930 				     ETHTOOL_COALESCE_RX_MAX_FRAMES,
1931 	.get_link_ksettings	= cxgb4vf_get_link_ksettings,
1932 	.get_fecparam		= cxgb4vf_get_fecparam,
1933 	.get_drvinfo		= cxgb4vf_get_drvinfo,
1934 	.get_msglevel		= cxgb4vf_get_msglevel,
1935 	.set_msglevel		= cxgb4vf_set_msglevel,
1936 	.get_ringparam		= cxgb4vf_get_ringparam,
1937 	.set_ringparam		= cxgb4vf_set_ringparam,
1938 	.get_coalesce		= cxgb4vf_get_coalesce,
1939 	.set_coalesce		= cxgb4vf_set_coalesce,
1940 	.get_pauseparam		= cxgb4vf_get_pauseparam,
1941 	.get_link		= ethtool_op_get_link,
1942 	.get_strings		= cxgb4vf_get_strings,
1943 	.set_phys_id		= cxgb4vf_phys_id,
1944 	.get_sset_count		= cxgb4vf_get_sset_count,
1945 	.get_ethtool_stats	= cxgb4vf_get_ethtool_stats,
1946 	.get_regs_len		= cxgb4vf_get_regs_len,
1947 	.get_regs		= cxgb4vf_get_regs,
1948 	.get_wol		= cxgb4vf_get_wol,
1949 };
1950 
1951 /*
1952  * /sys/kernel/debug/cxgb4vf support code and data.
1953  * ================================================
1954  */
1955 
1956 /*
1957  * Show Firmware Mailbox Command/Reply Log
1958  *
1959  * Note that we don't do any locking when dumping the Firmware Mailbox Log so
1960  * it's possible that we can catch things during a log update and therefore
1961  * see partially corrupted log entries.  But i9t's probably Good Enough(tm).
1962  * If we ever decide that we want to make sure that we're dumping a coherent
1963  * log, we'd need to perform locking in the mailbox logging and in
1964  * mboxlog_open() where we'd need to grab the entire mailbox log in one go
1965  * like we do for the Firmware Device Log.  But as stated above, meh ...
1966  */
mboxlog_show(struct seq_file * seq,void * v)1967 static int mboxlog_show(struct seq_file *seq, void *v)
1968 {
1969 	struct adapter *adapter = seq->private;
1970 	struct mbox_cmd_log *log = adapter->mbox_log;
1971 	struct mbox_cmd *entry;
1972 	int entry_idx, i;
1973 
1974 	if (v == SEQ_START_TOKEN) {
1975 		seq_printf(seq,
1976 			   "%10s  %15s  %5s  %5s  %s\n",
1977 			   "Seq#", "Tstamp", "Atime", "Etime",
1978 			   "Command/Reply");
1979 		return 0;
1980 	}
1981 
1982 	entry_idx = log->cursor + ((uintptr_t)v - 2);
1983 	if (entry_idx >= log->size)
1984 		entry_idx -= log->size;
1985 	entry = mbox_cmd_log_entry(log, entry_idx);
1986 
1987 	/* skip over unused entries */
1988 	if (entry->timestamp == 0)
1989 		return 0;
1990 
1991 	seq_printf(seq, "%10u  %15llu  %5d  %5d",
1992 		   entry->seqno, entry->timestamp,
1993 		   entry->access, entry->execute);
1994 	for (i = 0; i < MBOX_LEN / 8; i++) {
1995 		u64 flit = entry->cmd[i];
1996 		u32 hi = (u32)(flit >> 32);
1997 		u32 lo = (u32)flit;
1998 
1999 		seq_printf(seq, "  %08x %08x", hi, lo);
2000 	}
2001 	seq_puts(seq, "\n");
2002 	return 0;
2003 }
2004 
mboxlog_get_idx(struct seq_file * seq,loff_t pos)2005 static inline void *mboxlog_get_idx(struct seq_file *seq, loff_t pos)
2006 {
2007 	struct adapter *adapter = seq->private;
2008 	struct mbox_cmd_log *log = adapter->mbox_log;
2009 
2010 	return ((pos <= log->size) ? (void *)(uintptr_t)(pos + 1) : NULL);
2011 }
2012 
mboxlog_start(struct seq_file * seq,loff_t * pos)2013 static void *mboxlog_start(struct seq_file *seq, loff_t *pos)
2014 {
2015 	return *pos ? mboxlog_get_idx(seq, *pos) : SEQ_START_TOKEN;
2016 }
2017 
mboxlog_next(struct seq_file * seq,void * v,loff_t * pos)2018 static void *mboxlog_next(struct seq_file *seq, void *v, loff_t *pos)
2019 {
2020 	++*pos;
2021 	return mboxlog_get_idx(seq, *pos);
2022 }
2023 
mboxlog_stop(struct seq_file * seq,void * v)2024 static void mboxlog_stop(struct seq_file *seq, void *v)
2025 {
2026 }
2027 
2028 static const struct seq_operations mboxlog_sops = {
2029 	.start = mboxlog_start,
2030 	.next  = mboxlog_next,
2031 	.stop  = mboxlog_stop,
2032 	.show  = mboxlog_show
2033 };
2034 
2035 DEFINE_SEQ_ATTRIBUTE(mboxlog);
2036 /*
2037  * Show SGE Queue Set information.  We display QPL Queues Sets per line.
2038  */
2039 #define QPL	4
2040 
sge_qinfo_show(struct seq_file * seq,void * v)2041 static int sge_qinfo_show(struct seq_file *seq, void *v)
2042 {
2043 	struct adapter *adapter = seq->private;
2044 	int eth_entries = DIV_ROUND_UP(adapter->sge.ethqsets, QPL);
2045 	int qs, r = (uintptr_t)v - 1;
2046 
2047 	if (r)
2048 		seq_putc(seq, '\n');
2049 
2050 	#define S3(fmt_spec, s, v) \
2051 		do {\
2052 			seq_printf(seq, "%-12s", s); \
2053 			for (qs = 0; qs < n; ++qs) \
2054 				seq_printf(seq, " %16" fmt_spec, v); \
2055 			seq_putc(seq, '\n'); \
2056 		} while (0)
2057 	#define S(s, v)		S3("s", s, v)
2058 	#define T(s, v)		S3("u", s, txq[qs].v)
2059 	#define R(s, v)		S3("u", s, rxq[qs].v)
2060 
2061 	if (r < eth_entries) {
2062 		const struct sge_eth_rxq *rxq = &adapter->sge.ethrxq[r * QPL];
2063 		const struct sge_eth_txq *txq = &adapter->sge.ethtxq[r * QPL];
2064 		int n = min(QPL, adapter->sge.ethqsets - QPL * r);
2065 
2066 		S("QType:", "Ethernet");
2067 		S("Interface:",
2068 		  (rxq[qs].rspq.netdev
2069 		   ? rxq[qs].rspq.netdev->name
2070 		   : "N/A"));
2071 		S3("d", "Port:",
2072 		   (rxq[qs].rspq.netdev
2073 		    ? ((struct port_info *)
2074 		       netdev_priv(rxq[qs].rspq.netdev))->port_id
2075 		    : -1));
2076 		T("TxQ ID:", q.abs_id);
2077 		T("TxQ size:", q.size);
2078 		T("TxQ inuse:", q.in_use);
2079 		T("TxQ PIdx:", q.pidx);
2080 		T("TxQ CIdx:", q.cidx);
2081 		R("RspQ ID:", rspq.abs_id);
2082 		R("RspQ size:", rspq.size);
2083 		R("RspQE size:", rspq.iqe_len);
2084 		S3("u", "Intr delay:", qtimer_val(adapter, &rxq[qs].rspq));
2085 		S3("u", "Intr pktcnt:",
2086 		   adapter->sge.counter_val[rxq[qs].rspq.pktcnt_idx]);
2087 		R("RspQ CIdx:", rspq.cidx);
2088 		R("RspQ Gen:", rspq.gen);
2089 		R("FL ID:", fl.abs_id);
2090 		R("FL size:", fl.size - MIN_FL_RESID);
2091 		R("FL avail:", fl.avail);
2092 		R("FL PIdx:", fl.pidx);
2093 		R("FL CIdx:", fl.cidx);
2094 		return 0;
2095 	}
2096 
2097 	r -= eth_entries;
2098 	if (r == 0) {
2099 		const struct sge_rspq *evtq = &adapter->sge.fw_evtq;
2100 
2101 		seq_printf(seq, "%-12s %16s\n", "QType:", "FW event queue");
2102 		seq_printf(seq, "%-12s %16u\n", "RspQ ID:", evtq->abs_id);
2103 		seq_printf(seq, "%-12s %16u\n", "Intr delay:",
2104 			   qtimer_val(adapter, evtq));
2105 		seq_printf(seq, "%-12s %16u\n", "Intr pktcnt:",
2106 			   adapter->sge.counter_val[evtq->pktcnt_idx]);
2107 		seq_printf(seq, "%-12s %16u\n", "RspQ Cidx:", evtq->cidx);
2108 		seq_printf(seq, "%-12s %16u\n", "RspQ Gen:", evtq->gen);
2109 	} else if (r == 1) {
2110 		const struct sge_rspq *intrq = &adapter->sge.intrq;
2111 
2112 		seq_printf(seq, "%-12s %16s\n", "QType:", "Interrupt Queue");
2113 		seq_printf(seq, "%-12s %16u\n", "RspQ ID:", intrq->abs_id);
2114 		seq_printf(seq, "%-12s %16u\n", "Intr delay:",
2115 			   qtimer_val(adapter, intrq));
2116 		seq_printf(seq, "%-12s %16u\n", "Intr pktcnt:",
2117 			   adapter->sge.counter_val[intrq->pktcnt_idx]);
2118 		seq_printf(seq, "%-12s %16u\n", "RspQ Cidx:", intrq->cidx);
2119 		seq_printf(seq, "%-12s %16u\n", "RspQ Gen:", intrq->gen);
2120 	}
2121 
2122 	#undef R
2123 	#undef T
2124 	#undef S
2125 	#undef S3
2126 
2127 	return 0;
2128 }
2129 
2130 /*
2131  * Return the number of "entries" in our "file".  We group the multi-Queue
2132  * sections with QPL Queue Sets per "entry".  The sections of the output are:
2133  *
2134  *     Ethernet RX/TX Queue Sets
2135  *     Firmware Event Queue
2136  *     Forwarded Interrupt Queue (if in MSI mode)
2137  */
sge_queue_entries(const struct adapter * adapter)2138 static int sge_queue_entries(const struct adapter *adapter)
2139 {
2140 	return DIV_ROUND_UP(adapter->sge.ethqsets, QPL) + 1 +
2141 		((adapter->flags & CXGB4VF_USING_MSI) != 0);
2142 }
2143 
sge_queue_start(struct seq_file * seq,loff_t * pos)2144 static void *sge_queue_start(struct seq_file *seq, loff_t *pos)
2145 {
2146 	int entries = sge_queue_entries(seq->private);
2147 
2148 	return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
2149 }
2150 
sge_queue_stop(struct seq_file * seq,void * v)2151 static void sge_queue_stop(struct seq_file *seq, void *v)
2152 {
2153 }
2154 
sge_queue_next(struct seq_file * seq,void * v,loff_t * pos)2155 static void *sge_queue_next(struct seq_file *seq, void *v, loff_t *pos)
2156 {
2157 	int entries = sge_queue_entries(seq->private);
2158 
2159 	++*pos;
2160 	return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
2161 }
2162 
2163 static const struct seq_operations sge_qinfo_sops = {
2164 	.start = sge_queue_start,
2165 	.next  = sge_queue_next,
2166 	.stop  = sge_queue_stop,
2167 	.show  = sge_qinfo_show
2168 };
2169 
2170 DEFINE_SEQ_ATTRIBUTE(sge_qinfo);
2171 
2172 /*
2173  * Show SGE Queue Set statistics.  We display QPL Queues Sets per line.
2174  */
2175 #define QPL	4
2176 
sge_qstats_show(struct seq_file * seq,void * v)2177 static int sge_qstats_show(struct seq_file *seq, void *v)
2178 {
2179 	struct adapter *adapter = seq->private;
2180 	int eth_entries = DIV_ROUND_UP(adapter->sge.ethqsets, QPL);
2181 	int qs, r = (uintptr_t)v - 1;
2182 
2183 	if (r)
2184 		seq_putc(seq, '\n');
2185 
2186 	#define S3(fmt, s, v) \
2187 		do { \
2188 			seq_printf(seq, "%-16s", s); \
2189 			for (qs = 0; qs < n; ++qs) \
2190 				seq_printf(seq, " %8" fmt, v); \
2191 			seq_putc(seq, '\n'); \
2192 		} while (0)
2193 	#define S(s, v)		S3("s", s, v)
2194 
2195 	#define T3(fmt, s, v)	S3(fmt, s, txq[qs].v)
2196 	#define T(s, v)		T3("lu", s, v)
2197 
2198 	#define R3(fmt, s, v)	S3(fmt, s, rxq[qs].v)
2199 	#define R(s, v)		R3("lu", s, v)
2200 
2201 	if (r < eth_entries) {
2202 		const struct sge_eth_rxq *rxq = &adapter->sge.ethrxq[r * QPL];
2203 		const struct sge_eth_txq *txq = &adapter->sge.ethtxq[r * QPL];
2204 		int n = min(QPL, adapter->sge.ethqsets - QPL * r);
2205 
2206 		S("QType:", "Ethernet");
2207 		S("Interface:",
2208 		  (rxq[qs].rspq.netdev
2209 		   ? rxq[qs].rspq.netdev->name
2210 		   : "N/A"));
2211 		R3("u", "RspQNullInts:", rspq.unhandled_irqs);
2212 		R("RxPackets:", stats.pkts);
2213 		R("RxCSO:", stats.rx_cso);
2214 		R("VLANxtract:", stats.vlan_ex);
2215 		R("LROmerged:", stats.lro_merged);
2216 		R("LROpackets:", stats.lro_pkts);
2217 		R("RxDrops:", stats.rx_drops);
2218 		T("TSO:", tso);
2219 		T("TxCSO:", tx_cso);
2220 		T("VLANins:", vlan_ins);
2221 		T("TxQFull:", q.stops);
2222 		T("TxQRestarts:", q.restarts);
2223 		T("TxMapErr:", mapping_err);
2224 		R("FLAllocErr:", fl.alloc_failed);
2225 		R("FLLrgAlcErr:", fl.large_alloc_failed);
2226 		R("FLStarving:", fl.starving);
2227 		return 0;
2228 	}
2229 
2230 	r -= eth_entries;
2231 	if (r == 0) {
2232 		const struct sge_rspq *evtq = &adapter->sge.fw_evtq;
2233 
2234 		seq_printf(seq, "%-8s %16s\n", "QType:", "FW event queue");
2235 		seq_printf(seq, "%-16s %8u\n", "RspQNullInts:",
2236 			   evtq->unhandled_irqs);
2237 		seq_printf(seq, "%-16s %8u\n", "RspQ CIdx:", evtq->cidx);
2238 		seq_printf(seq, "%-16s %8u\n", "RspQ Gen:", evtq->gen);
2239 	} else if (r == 1) {
2240 		const struct sge_rspq *intrq = &adapter->sge.intrq;
2241 
2242 		seq_printf(seq, "%-8s %16s\n", "QType:", "Interrupt Queue");
2243 		seq_printf(seq, "%-16s %8u\n", "RspQNullInts:",
2244 			   intrq->unhandled_irqs);
2245 		seq_printf(seq, "%-16s %8u\n", "RspQ CIdx:", intrq->cidx);
2246 		seq_printf(seq, "%-16s %8u\n", "RspQ Gen:", intrq->gen);
2247 	}
2248 
2249 	#undef R
2250 	#undef T
2251 	#undef S
2252 	#undef R3
2253 	#undef T3
2254 	#undef S3
2255 
2256 	return 0;
2257 }
2258 
2259 /*
2260  * Return the number of "entries" in our "file".  We group the multi-Queue
2261  * sections with QPL Queue Sets per "entry".  The sections of the output are:
2262  *
2263  *     Ethernet RX/TX Queue Sets
2264  *     Firmware Event Queue
2265  *     Forwarded Interrupt Queue (if in MSI mode)
2266  */
sge_qstats_entries(const struct adapter * adapter)2267 static int sge_qstats_entries(const struct adapter *adapter)
2268 {
2269 	return DIV_ROUND_UP(adapter->sge.ethqsets, QPL) + 1 +
2270 		((adapter->flags & CXGB4VF_USING_MSI) != 0);
2271 }
2272 
sge_qstats_start(struct seq_file * seq,loff_t * pos)2273 static void *sge_qstats_start(struct seq_file *seq, loff_t *pos)
2274 {
2275 	int entries = sge_qstats_entries(seq->private);
2276 
2277 	return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
2278 }
2279 
sge_qstats_stop(struct seq_file * seq,void * v)2280 static void sge_qstats_stop(struct seq_file *seq, void *v)
2281 {
2282 }
2283 
sge_qstats_next(struct seq_file * seq,void * v,loff_t * pos)2284 static void *sge_qstats_next(struct seq_file *seq, void *v, loff_t *pos)
2285 {
2286 	int entries = sge_qstats_entries(seq->private);
2287 
2288 	(*pos)++;
2289 	return *pos < entries ? (void *)((uintptr_t)*pos + 1) : NULL;
2290 }
2291 
2292 static const struct seq_operations sge_qstats_sops = {
2293 	.start = sge_qstats_start,
2294 	.next  = sge_qstats_next,
2295 	.stop  = sge_qstats_stop,
2296 	.show  = sge_qstats_show
2297 };
2298 
2299 DEFINE_SEQ_ATTRIBUTE(sge_qstats);
2300 
2301 /*
2302  * Show PCI-E SR-IOV Virtual Function Resource Limits.
2303  */
resources_show(struct seq_file * seq,void * v)2304 static int resources_show(struct seq_file *seq, void *v)
2305 {
2306 	struct adapter *adapter = seq->private;
2307 	struct vf_resources *vfres = &adapter->params.vfres;
2308 
2309 	#define S(desc, fmt, var) \
2310 		seq_printf(seq, "%-60s " fmt "\n", \
2311 			   desc " (" #var "):", vfres->var)
2312 
2313 	S("Virtual Interfaces", "%d", nvi);
2314 	S("Egress Queues", "%d", neq);
2315 	S("Ethernet Control", "%d", nethctrl);
2316 	S("Ingress Queues/w Free Lists/Interrupts", "%d", niqflint);
2317 	S("Ingress Queues", "%d", niq);
2318 	S("Traffic Class", "%d", tc);
2319 	S("Port Access Rights Mask", "%#x", pmask);
2320 	S("MAC Address Filters", "%d", nexactf);
2321 	S("Firmware Command Read Capabilities", "%#x", r_caps);
2322 	S("Firmware Command Write/Execute Capabilities", "%#x", wx_caps);
2323 
2324 	#undef S
2325 
2326 	return 0;
2327 }
2328 DEFINE_SHOW_ATTRIBUTE(resources);
2329 
2330 /*
2331  * Show Virtual Interfaces.
2332  */
interfaces_show(struct seq_file * seq,void * v)2333 static int interfaces_show(struct seq_file *seq, void *v)
2334 {
2335 	if (v == SEQ_START_TOKEN) {
2336 		seq_puts(seq, "Interface  Port   VIID\n");
2337 	} else {
2338 		struct adapter *adapter = seq->private;
2339 		int pidx = (uintptr_t)v - 2;
2340 		struct net_device *dev = adapter->port[pidx];
2341 		struct port_info *pi = netdev_priv(dev);
2342 
2343 		seq_printf(seq, "%9s  %4d  %#5x\n",
2344 			   dev->name, pi->port_id, pi->viid);
2345 	}
2346 	return 0;
2347 }
2348 
interfaces_get_idx(struct adapter * adapter,loff_t pos)2349 static inline void *interfaces_get_idx(struct adapter *adapter, loff_t pos)
2350 {
2351 	return pos <= adapter->params.nports
2352 		? (void *)(uintptr_t)(pos + 1)
2353 		: NULL;
2354 }
2355 
interfaces_start(struct seq_file * seq,loff_t * pos)2356 static void *interfaces_start(struct seq_file *seq, loff_t *pos)
2357 {
2358 	return *pos
2359 		? interfaces_get_idx(seq->private, *pos)
2360 		: SEQ_START_TOKEN;
2361 }
2362 
interfaces_next(struct seq_file * seq,void * v,loff_t * pos)2363 static void *interfaces_next(struct seq_file *seq, void *v, loff_t *pos)
2364 {
2365 	(*pos)++;
2366 	return interfaces_get_idx(seq->private, *pos);
2367 }
2368 
interfaces_stop(struct seq_file * seq,void * v)2369 static void interfaces_stop(struct seq_file *seq, void *v)
2370 {
2371 }
2372 
2373 static const struct seq_operations interfaces_sops = {
2374 	.start = interfaces_start,
2375 	.next  = interfaces_next,
2376 	.stop  = interfaces_stop,
2377 	.show  = interfaces_show
2378 };
2379 
2380 DEFINE_SEQ_ATTRIBUTE(interfaces);
2381 
2382 /*
2383  * /sys/kernel/debugfs/cxgb4vf/ files list.
2384  */
2385 struct cxgb4vf_debugfs_entry {
2386 	const char *name;		/* name of debugfs node */
2387 	umode_t mode;			/* file system mode */
2388 	const struct file_operations *fops;
2389 };
2390 
2391 static struct cxgb4vf_debugfs_entry debugfs_files[] = {
2392 	{ "mboxlog",    0444, &mboxlog_fops },
2393 	{ "sge_qinfo",  0444, &sge_qinfo_fops },
2394 	{ "sge_qstats", 0444, &sge_qstats_fops },
2395 	{ "resources",  0444, &resources_fops },
2396 	{ "interfaces", 0444, &interfaces_fops },
2397 };
2398 
2399 /*
2400  * Module and device initialization and cleanup code.
2401  * ==================================================
2402  */
2403 
2404 /*
2405  * Set up out /sys/kernel/debug/cxgb4vf sub-nodes.  We assume that the
2406  * directory (debugfs_root) has already been set up.
2407  */
setup_debugfs(struct adapter * adapter)2408 static int setup_debugfs(struct adapter *adapter)
2409 {
2410 	int i;
2411 
2412 	BUG_ON(IS_ERR_OR_NULL(adapter->debugfs_root));
2413 
2414 	/*
2415 	 * Debugfs support is best effort.
2416 	 */
2417 	for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
2418 		debugfs_create_file(debugfs_files[i].name,
2419 				    debugfs_files[i].mode,
2420 				    adapter->debugfs_root, adapter,
2421 				    debugfs_files[i].fops);
2422 
2423 	return 0;
2424 }
2425 
2426 /*
2427  * Tear down the /sys/kernel/debug/cxgb4vf sub-nodes created above.  We leave
2428  * it to our caller to tear down the directory (debugfs_root).
2429  */
cleanup_debugfs(struct adapter * adapter)2430 static void cleanup_debugfs(struct adapter *adapter)
2431 {
2432 	BUG_ON(IS_ERR_OR_NULL(adapter->debugfs_root));
2433 
2434 	/*
2435 	 * Unlike our sister routine cleanup_proc(), we don't need to remove
2436 	 * individual entries because a call will be made to
2437 	 * debugfs_remove_recursive().  We just need to clean up any ancillary
2438 	 * persistent state.
2439 	 */
2440 	/* nothing to do */
2441 }
2442 
2443 /* Figure out how many Ports and Queue Sets we can support.  This depends on
2444  * knowing our Virtual Function Resources and may be called a second time if
2445  * we fall back from MSI-X to MSI Interrupt Mode.
2446  */
size_nports_qsets(struct adapter * adapter)2447 static void size_nports_qsets(struct adapter *adapter)
2448 {
2449 	struct vf_resources *vfres = &adapter->params.vfres;
2450 	unsigned int ethqsets, pmask_nports;
2451 
2452 	/* The number of "ports" which we support is equal to the number of
2453 	 * Virtual Interfaces with which we've been provisioned.
2454 	 */
2455 	adapter->params.nports = vfres->nvi;
2456 	if (adapter->params.nports > MAX_NPORTS) {
2457 		dev_warn(adapter->pdev_dev, "only using %d of %d maximum"
2458 			 " allowed virtual interfaces\n", MAX_NPORTS,
2459 			 adapter->params.nports);
2460 		adapter->params.nports = MAX_NPORTS;
2461 	}
2462 
2463 	/* We may have been provisioned with more VIs than the number of
2464 	 * ports we're allowed to access (our Port Access Rights Mask).
2465 	 * This is obviously a configuration conflict but we don't want to
2466 	 * crash the kernel or anything silly just because of that.
2467 	 */
2468 	pmask_nports = hweight32(adapter->params.vfres.pmask);
2469 	if (pmask_nports < adapter->params.nports) {
2470 		dev_warn(adapter->pdev_dev, "only using %d of %d provisioned"
2471 			 " virtual interfaces; limited by Port Access Rights"
2472 			 " mask %#x\n", pmask_nports, adapter->params.nports,
2473 			 adapter->params.vfres.pmask);
2474 		adapter->params.nports = pmask_nports;
2475 	}
2476 
2477 	/* We need to reserve an Ingress Queue for the Asynchronous Firmware
2478 	 * Event Queue.  And if we're using MSI Interrupts, we'll also need to
2479 	 * reserve an Ingress Queue for a Forwarded Interrupts.
2480 	 *
2481 	 * The rest of the FL/Intr-capable ingress queues will be matched up
2482 	 * one-for-one with Ethernet/Control egress queues in order to form
2483 	 * "Queue Sets" which will be aportioned between the "ports".  For
2484 	 * each Queue Set, we'll need the ability to allocate two Egress
2485 	 * Contexts -- one for the Ingress Queue Free List and one for the TX
2486 	 * Ethernet Queue.
2487 	 *
2488 	 * Note that even if we're currently configured to use MSI-X
2489 	 * Interrupts (module variable msi == MSI_MSIX) we may get downgraded
2490 	 * to MSI Interrupts if we can't get enough MSI-X Interrupts.  If that
2491 	 * happens we'll need to adjust things later.
2492 	 */
2493 	ethqsets = vfres->niqflint - 1 - (msi == MSI_MSI);
2494 	if (vfres->nethctrl != ethqsets)
2495 		ethqsets = min(vfres->nethctrl, ethqsets);
2496 	if (vfres->neq < ethqsets*2)
2497 		ethqsets = vfres->neq/2;
2498 	if (ethqsets > MAX_ETH_QSETS)
2499 		ethqsets = MAX_ETH_QSETS;
2500 	adapter->sge.max_ethqsets = ethqsets;
2501 
2502 	if (adapter->sge.max_ethqsets < adapter->params.nports) {
2503 		dev_warn(adapter->pdev_dev, "only using %d of %d available"
2504 			 " virtual interfaces (too few Queue Sets)\n",
2505 			 adapter->sge.max_ethqsets, adapter->params.nports);
2506 		adapter->params.nports = adapter->sge.max_ethqsets;
2507 	}
2508 }
2509 
2510 /*
2511  * Perform early "adapter" initialization.  This is where we discover what
2512  * adapter parameters we're going to be using and initialize basic adapter
2513  * hardware support.
2514  */
adap_init0(struct adapter * adapter)2515 static int adap_init0(struct adapter *adapter)
2516 {
2517 	struct sge_params *sge_params = &adapter->params.sge;
2518 	struct sge *s = &adapter->sge;
2519 	int err;
2520 	u32 param, val = 0;
2521 
2522 	/*
2523 	 * Some environments do not properly handle PCIE FLRs -- e.g. in Linux
2524 	 * 2.6.31 and later we can't call pci_reset_function() in order to
2525 	 * issue an FLR because of a self- deadlock on the device semaphore.
2526 	 * Meanwhile, the OS infrastructure doesn't issue FLRs in all the
2527 	 * cases where they're needed -- for instance, some versions of KVM
2528 	 * fail to reset "Assigned Devices" when the VM reboots.  Therefore we
2529 	 * use the firmware based reset in order to reset any per function
2530 	 * state.
2531 	 */
2532 	err = t4vf_fw_reset(adapter);
2533 	if (err < 0) {
2534 		dev_err(adapter->pdev_dev, "FW reset failed: err=%d\n", err);
2535 		return err;
2536 	}
2537 
2538 	/*
2539 	 * Grab basic operational parameters.  These will predominantly have
2540 	 * been set up by the Physical Function Driver or will be hard coded
2541 	 * into the adapter.  We just have to live with them ...  Note that
2542 	 * we _must_ get our VPD parameters before our SGE parameters because
2543 	 * we need to know the adapter's core clock from the VPD in order to
2544 	 * properly decode the SGE Timer Values.
2545 	 */
2546 	err = t4vf_get_dev_params(adapter);
2547 	if (err) {
2548 		dev_err(adapter->pdev_dev, "unable to retrieve adapter"
2549 			" device parameters: err=%d\n", err);
2550 		return err;
2551 	}
2552 	err = t4vf_get_vpd_params(adapter);
2553 	if (err) {
2554 		dev_err(adapter->pdev_dev, "unable to retrieve adapter"
2555 			" VPD parameters: err=%d\n", err);
2556 		return err;
2557 	}
2558 	err = t4vf_get_sge_params(adapter);
2559 	if (err) {
2560 		dev_err(adapter->pdev_dev, "unable to retrieve adapter"
2561 			" SGE parameters: err=%d\n", err);
2562 		return err;
2563 	}
2564 	err = t4vf_get_rss_glb_config(adapter);
2565 	if (err) {
2566 		dev_err(adapter->pdev_dev, "unable to retrieve adapter"
2567 			" RSS parameters: err=%d\n", err);
2568 		return err;
2569 	}
2570 	if (adapter->params.rss.mode !=
2571 	    FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
2572 		dev_err(adapter->pdev_dev, "unable to operate with global RSS"
2573 			" mode %d\n", adapter->params.rss.mode);
2574 		return -EINVAL;
2575 	}
2576 	err = t4vf_sge_init(adapter);
2577 	if (err) {
2578 		dev_err(adapter->pdev_dev, "unable to use adapter parameters:"
2579 			" err=%d\n", err);
2580 		return err;
2581 	}
2582 
2583 	/* If we're running on newer firmware, let it know that we're
2584 	 * prepared to deal with encapsulated CPL messages.  Older
2585 	 * firmware won't understand this and we'll just get
2586 	 * unencapsulated messages ...
2587 	 */
2588 	param = FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_PFVF) |
2589 		FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP);
2590 	val = 1;
2591 	(void) t4vf_set_params(adapter, 1, &param, &val);
2592 
2593 	/*
2594 	 * Retrieve our RX interrupt holdoff timer values and counter
2595 	 * threshold values from the SGE parameters.
2596 	 */
2597 	s->timer_val[0] = core_ticks_to_us(adapter,
2598 		TIMERVALUE0_G(sge_params->sge_timer_value_0_and_1));
2599 	s->timer_val[1] = core_ticks_to_us(adapter,
2600 		TIMERVALUE1_G(sge_params->sge_timer_value_0_and_1));
2601 	s->timer_val[2] = core_ticks_to_us(adapter,
2602 		TIMERVALUE0_G(sge_params->sge_timer_value_2_and_3));
2603 	s->timer_val[3] = core_ticks_to_us(adapter,
2604 		TIMERVALUE1_G(sge_params->sge_timer_value_2_and_3));
2605 	s->timer_val[4] = core_ticks_to_us(adapter,
2606 		TIMERVALUE0_G(sge_params->sge_timer_value_4_and_5));
2607 	s->timer_val[5] = core_ticks_to_us(adapter,
2608 		TIMERVALUE1_G(sge_params->sge_timer_value_4_and_5));
2609 
2610 	s->counter_val[0] = THRESHOLD_0_G(sge_params->sge_ingress_rx_threshold);
2611 	s->counter_val[1] = THRESHOLD_1_G(sge_params->sge_ingress_rx_threshold);
2612 	s->counter_val[2] = THRESHOLD_2_G(sge_params->sge_ingress_rx_threshold);
2613 	s->counter_val[3] = THRESHOLD_3_G(sge_params->sge_ingress_rx_threshold);
2614 
2615 	/*
2616 	 * Grab our Virtual Interface resource allocation, extract the
2617 	 * features that we're interested in and do a bit of sanity testing on
2618 	 * what we discover.
2619 	 */
2620 	err = t4vf_get_vfres(adapter);
2621 	if (err) {
2622 		dev_err(adapter->pdev_dev, "unable to get virtual interface"
2623 			" resources: err=%d\n", err);
2624 		return err;
2625 	}
2626 
2627 	/* Check for various parameter sanity issues */
2628 	if (adapter->params.vfres.pmask == 0) {
2629 		dev_err(adapter->pdev_dev, "no port access configured\n"
2630 			"usable!\n");
2631 		return -EINVAL;
2632 	}
2633 	if (adapter->params.vfres.nvi == 0) {
2634 		dev_err(adapter->pdev_dev, "no virtual interfaces configured/"
2635 			"usable!\n");
2636 		return -EINVAL;
2637 	}
2638 
2639 	/* Initialize nports and max_ethqsets now that we have our Virtual
2640 	 * Function Resources.
2641 	 */
2642 	size_nports_qsets(adapter);
2643 
2644 	adapter->flags |= CXGB4VF_FW_OK;
2645 	return 0;
2646 }
2647 
init_rspq(struct sge_rspq * rspq,u8 timer_idx,u8 pkt_cnt_idx,unsigned int size,unsigned int iqe_size)2648 static inline void init_rspq(struct sge_rspq *rspq, u8 timer_idx,
2649 			     u8 pkt_cnt_idx, unsigned int size,
2650 			     unsigned int iqe_size)
2651 {
2652 	rspq->intr_params = (QINTR_TIMER_IDX_V(timer_idx) |
2653 			     (pkt_cnt_idx < SGE_NCOUNTERS ?
2654 			      QINTR_CNT_EN_F : 0));
2655 	rspq->pktcnt_idx = (pkt_cnt_idx < SGE_NCOUNTERS
2656 			    ? pkt_cnt_idx
2657 			    : 0);
2658 	rspq->iqe_len = iqe_size;
2659 	rspq->size = size;
2660 }
2661 
2662 /*
2663  * Perform default configuration of DMA queues depending on the number and
2664  * type of ports we found and the number of available CPUs.  Most settings can
2665  * be modified by the admin via ethtool and cxgbtool prior to the adapter
2666  * being brought up for the first time.
2667  */
cfg_queues(struct adapter * adapter)2668 static void cfg_queues(struct adapter *adapter)
2669 {
2670 	struct sge *s = &adapter->sge;
2671 	int q10g, n10g, qidx, pidx, qs;
2672 	size_t iqe_size;
2673 
2674 	/*
2675 	 * We should not be called till we know how many Queue Sets we can
2676 	 * support.  In particular, this means that we need to know what kind
2677 	 * of interrupts we'll be using ...
2678 	 */
2679 	BUG_ON((adapter->flags &
2680 	       (CXGB4VF_USING_MSIX | CXGB4VF_USING_MSI)) == 0);
2681 
2682 	/*
2683 	 * Count the number of 10GbE Virtual Interfaces that we have.
2684 	 */
2685 	n10g = 0;
2686 	for_each_port(adapter, pidx)
2687 		n10g += is_x_10g_port(&adap2pinfo(adapter, pidx)->link_cfg);
2688 
2689 	/*
2690 	 * We default to 1 queue per non-10G port and up to # of cores queues
2691 	 * per 10G port.
2692 	 */
2693 	if (n10g == 0)
2694 		q10g = 0;
2695 	else {
2696 		int n1g = (adapter->params.nports - n10g);
2697 		q10g = (adapter->sge.max_ethqsets - n1g) / n10g;
2698 		if (q10g > num_online_cpus())
2699 			q10g = num_online_cpus();
2700 	}
2701 
2702 	/*
2703 	 * Allocate the "Queue Sets" to the various Virtual Interfaces.
2704 	 * The layout will be established in setup_sge_queues() when the
2705 	 * adapter is brough up for the first time.
2706 	 */
2707 	qidx = 0;
2708 	for_each_port(adapter, pidx) {
2709 		struct port_info *pi = adap2pinfo(adapter, pidx);
2710 
2711 		pi->first_qset = qidx;
2712 		pi->nqsets = is_x_10g_port(&pi->link_cfg) ? q10g : 1;
2713 		qidx += pi->nqsets;
2714 	}
2715 	s->ethqsets = qidx;
2716 
2717 	/*
2718 	 * The Ingress Queue Entry Size for our various Response Queues needs
2719 	 * to be big enough to accommodate the largest message we can receive
2720 	 * from the chip/firmware; which is 64 bytes ...
2721 	 */
2722 	iqe_size = 64;
2723 
2724 	/*
2725 	 * Set up default Queue Set parameters ...  Start off with the
2726 	 * shortest interrupt holdoff timer.
2727 	 */
2728 	for (qs = 0; qs < s->max_ethqsets; qs++) {
2729 		struct sge_eth_rxq *rxq = &s->ethrxq[qs];
2730 		struct sge_eth_txq *txq = &s->ethtxq[qs];
2731 
2732 		init_rspq(&rxq->rspq, 0, 0, 1024, iqe_size);
2733 		rxq->fl.size = 72;
2734 		txq->q.size = 1024;
2735 	}
2736 
2737 	/*
2738 	 * The firmware event queue is used for link state changes and
2739 	 * notifications of TX DMA completions.
2740 	 */
2741 	init_rspq(&s->fw_evtq, SGE_TIMER_RSTRT_CNTR, 0, 512, iqe_size);
2742 
2743 	/*
2744 	 * The forwarded interrupt queue is used when we're in MSI interrupt
2745 	 * mode.  In this mode all interrupts associated with RX queues will
2746 	 * be forwarded to a single queue which we'll associate with our MSI
2747 	 * interrupt vector.  The messages dropped in the forwarded interrupt
2748 	 * queue will indicate which ingress queue needs servicing ...  This
2749 	 * queue needs to be large enough to accommodate all of the ingress
2750 	 * queues which are forwarding their interrupt (+1 to prevent the PIDX
2751 	 * from equalling the CIDX if every ingress queue has an outstanding
2752 	 * interrupt).  The queue doesn't need to be any larger because no
2753 	 * ingress queue will ever have more than one outstanding interrupt at
2754 	 * any time ...
2755 	 */
2756 	init_rspq(&s->intrq, SGE_TIMER_RSTRT_CNTR, 0, MSIX_ENTRIES + 1,
2757 		  iqe_size);
2758 }
2759 
2760 /*
2761  * Reduce the number of Ethernet queues across all ports to at most n.
2762  * n provides at least one queue per port.
2763  */
reduce_ethqs(struct adapter * adapter,int n)2764 static void reduce_ethqs(struct adapter *adapter, int n)
2765 {
2766 	int i;
2767 	struct port_info *pi;
2768 
2769 	/*
2770 	 * While we have too many active Ether Queue Sets, interate across the
2771 	 * "ports" and reduce their individual Queue Set allocations.
2772 	 */
2773 	BUG_ON(n < adapter->params.nports);
2774 	while (n < adapter->sge.ethqsets)
2775 		for_each_port(adapter, i) {
2776 			pi = adap2pinfo(adapter, i);
2777 			if (pi->nqsets > 1) {
2778 				pi->nqsets--;
2779 				adapter->sge.ethqsets--;
2780 				if (adapter->sge.ethqsets <= n)
2781 					break;
2782 			}
2783 		}
2784 
2785 	/*
2786 	 * Reassign the starting Queue Sets for each of the "ports" ...
2787 	 */
2788 	n = 0;
2789 	for_each_port(adapter, i) {
2790 		pi = adap2pinfo(adapter, i);
2791 		pi->first_qset = n;
2792 		n += pi->nqsets;
2793 	}
2794 }
2795 
2796 /*
2797  * We need to grab enough MSI-X vectors to cover our interrupt needs.  Ideally
2798  * we get a separate MSI-X vector for every "Queue Set" plus any extras we
2799  * need.  Minimally we need one for every Virtual Interface plus those needed
2800  * for our "extras".  Note that this process may lower the maximum number of
2801  * allowed Queue Sets ...
2802  */
enable_msix(struct adapter * adapter)2803 static int enable_msix(struct adapter *adapter)
2804 {
2805 	int i, want, need, nqsets;
2806 	struct msix_entry entries[MSIX_ENTRIES];
2807 	struct sge *s = &adapter->sge;
2808 
2809 	for (i = 0; i < MSIX_ENTRIES; ++i)
2810 		entries[i].entry = i;
2811 
2812 	/*
2813 	 * We _want_ enough MSI-X interrupts to cover all of our "Queue Sets"
2814 	 * plus those needed for our "extras" (for example, the firmware
2815 	 * message queue).  We _need_ at least one "Queue Set" per Virtual
2816 	 * Interface plus those needed for our "extras".  So now we get to see
2817 	 * if the song is right ...
2818 	 */
2819 	want = s->max_ethqsets + MSIX_EXTRAS;
2820 	need = adapter->params.nports + MSIX_EXTRAS;
2821 
2822 	want = pci_enable_msix_range(adapter->pdev, entries, need, want);
2823 	if (want < 0)
2824 		return want;
2825 
2826 	nqsets = want - MSIX_EXTRAS;
2827 	if (nqsets < s->max_ethqsets) {
2828 		dev_warn(adapter->pdev_dev, "only enough MSI-X vectors"
2829 			 " for %d Queue Sets\n", nqsets);
2830 		s->max_ethqsets = nqsets;
2831 		if (nqsets < s->ethqsets)
2832 			reduce_ethqs(adapter, nqsets);
2833 	}
2834 	for (i = 0; i < want; ++i)
2835 		adapter->msix_info[i].vec = entries[i].vector;
2836 
2837 	return 0;
2838 }
2839 
2840 static const struct net_device_ops cxgb4vf_netdev_ops	= {
2841 	.ndo_open		= cxgb4vf_open,
2842 	.ndo_stop		= cxgb4vf_stop,
2843 	.ndo_start_xmit		= t4vf_eth_xmit,
2844 	.ndo_get_stats		= cxgb4vf_get_stats,
2845 	.ndo_set_rx_mode	= cxgb4vf_set_rxmode,
2846 	.ndo_set_mac_address	= cxgb4vf_set_mac_addr,
2847 	.ndo_validate_addr	= eth_validate_addr,
2848 	.ndo_eth_ioctl		= cxgb4vf_do_ioctl,
2849 	.ndo_change_mtu		= cxgb4vf_change_mtu,
2850 	.ndo_fix_features	= cxgb4vf_fix_features,
2851 	.ndo_set_features	= cxgb4vf_set_features,
2852 #ifdef CONFIG_NET_POLL_CONTROLLER
2853 	.ndo_poll_controller	= cxgb4vf_poll_controller,
2854 #endif
2855 };
2856 
2857 /**
2858  *	cxgb4vf_get_port_mask - Get port mask for the VF based on mac
2859  *				address stored on the adapter
2860  *	@adapter: The adapter
2861  *
2862  *	Find the port mask for the VF based on the index of mac
2863  *	address stored in the adapter. If no mac address is stored on
2864  *	the adapter for the VF, use the port mask received from the
2865  *	firmware.
2866  */
cxgb4vf_get_port_mask(struct adapter * adapter)2867 static unsigned int cxgb4vf_get_port_mask(struct adapter *adapter)
2868 {
2869 	unsigned int naddr = 1, pidx = 0;
2870 	unsigned int pmask, rmask = 0;
2871 	u8 mac[ETH_ALEN];
2872 	int err;
2873 
2874 	pmask = adapter->params.vfres.pmask;
2875 	while (pmask) {
2876 		if (pmask & 1) {
2877 			err = t4vf_get_vf_mac_acl(adapter, pidx, &naddr, mac);
2878 			if (!err && !is_zero_ether_addr(mac))
2879 				rmask |= (1 << pidx);
2880 		}
2881 		pmask >>= 1;
2882 		pidx++;
2883 	}
2884 	if (!rmask)
2885 		rmask = adapter->params.vfres.pmask;
2886 
2887 	return rmask;
2888 }
2889 
2890 /*
2891  * "Probe" a device: initialize a device and construct all kernel and driver
2892  * state needed to manage the device.  This routine is called "init_one" in
2893  * the PF Driver ...
2894  */
cxgb4vf_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2895 static int cxgb4vf_pci_probe(struct pci_dev *pdev,
2896 			     const struct pci_device_id *ent)
2897 {
2898 	struct adapter *adapter;
2899 	struct net_device *netdev;
2900 	struct port_info *pi;
2901 	unsigned int pmask;
2902 	int err, pidx;
2903 
2904 	/*
2905 	 * Initialize generic PCI device state.
2906 	 */
2907 	err = pci_enable_device(pdev);
2908 	if (err)
2909 		return dev_err_probe(&pdev->dev, err, "cannot enable PCI device\n");
2910 
2911 	/*
2912 	 * Reserve PCI resources for the device.  If we can't get them some
2913 	 * other driver may have already claimed the device ...
2914 	 */
2915 	err = pci_request_regions(pdev, KBUILD_MODNAME);
2916 	if (err) {
2917 		dev_err(&pdev->dev, "cannot obtain PCI resources\n");
2918 		goto err_disable_device;
2919 	}
2920 
2921 	/*
2922 	 * Set up our DMA mask
2923 	 */
2924 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2925 	if (err) {
2926 		dev_err(&pdev->dev, "no usable DMA configuration\n");
2927 		goto err_release_regions;
2928 	}
2929 
2930 	/*
2931 	 * Enable bus mastering for the device ...
2932 	 */
2933 	pci_set_master(pdev);
2934 
2935 	/*
2936 	 * Allocate our adapter data structure and attach it to the device.
2937 	 */
2938 	adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2939 	if (!adapter) {
2940 		err = -ENOMEM;
2941 		goto err_release_regions;
2942 	}
2943 	pci_set_drvdata(pdev, adapter);
2944 	adapter->pdev = pdev;
2945 	adapter->pdev_dev = &pdev->dev;
2946 
2947 	adapter->mbox_log = kzalloc(sizeof(*adapter->mbox_log) +
2948 				    (sizeof(struct mbox_cmd) *
2949 				     T4VF_OS_LOG_MBOX_CMDS),
2950 				    GFP_KERNEL);
2951 	if (!adapter->mbox_log) {
2952 		err = -ENOMEM;
2953 		goto err_free_adapter;
2954 	}
2955 	adapter->mbox_log->size = T4VF_OS_LOG_MBOX_CMDS;
2956 
2957 	/*
2958 	 * Initialize SMP data synchronization resources.
2959 	 */
2960 	spin_lock_init(&adapter->stats_lock);
2961 	spin_lock_init(&adapter->mbox_lock);
2962 	INIT_LIST_HEAD(&adapter->mlist.list);
2963 
2964 	/*
2965 	 * Map our I/O registers in BAR0.
2966 	 */
2967 	adapter->regs = pci_ioremap_bar(pdev, 0);
2968 	if (!adapter->regs) {
2969 		dev_err(&pdev->dev, "cannot map device registers\n");
2970 		err = -ENOMEM;
2971 		goto err_free_adapter;
2972 	}
2973 
2974 	/* Wait for the device to become ready before proceeding ...
2975 	 */
2976 	err = t4vf_prep_adapter(adapter);
2977 	if (err) {
2978 		dev_err(adapter->pdev_dev, "device didn't become ready:"
2979 			" err=%d\n", err);
2980 		goto err_unmap_bar0;
2981 	}
2982 
2983 	/* For T5 and later we want to use the new BAR-based User Doorbells,
2984 	 * so we need to map BAR2 here ...
2985 	 */
2986 	if (!is_t4(adapter->params.chip)) {
2987 		adapter->bar2 = ioremap_wc(pci_resource_start(pdev, 2),
2988 					   pci_resource_len(pdev, 2));
2989 		if (!adapter->bar2) {
2990 			dev_err(adapter->pdev_dev, "cannot map BAR2 doorbells\n");
2991 			err = -ENOMEM;
2992 			goto err_unmap_bar0;
2993 		}
2994 	}
2995 	/*
2996 	 * Initialize adapter level features.
2997 	 */
2998 	adapter->name = pci_name(pdev);
2999 	adapter->msg_enable = DFLT_MSG_ENABLE;
3000 
3001 	/* If possible, we use PCIe Relaxed Ordering Attribute to deliver
3002 	 * Ingress Packet Data to Free List Buffers in order to allow for
3003 	 * chipset performance optimizations between the Root Complex and
3004 	 * Memory Controllers.  (Messages to the associated Ingress Queue
3005 	 * notifying new Packet Placement in the Free Lists Buffers will be
3006 	 * send without the Relaxed Ordering Attribute thus guaranteeing that
3007 	 * all preceding PCIe Transaction Layer Packets will be processed
3008 	 * first.)  But some Root Complexes have various issues with Upstream
3009 	 * Transaction Layer Packets with the Relaxed Ordering Attribute set.
3010 	 * The PCIe devices which under the Root Complexes will be cleared the
3011 	 * Relaxed Ordering bit in the configuration space, So we check our
3012 	 * PCIe configuration space to see if it's flagged with advice against
3013 	 * using Relaxed Ordering.
3014 	 */
3015 	if (!pcie_relaxed_ordering_enabled(pdev))
3016 		adapter->flags |= CXGB4VF_ROOT_NO_RELAXED_ORDERING;
3017 
3018 	err = adap_init0(adapter);
3019 	if (err)
3020 		dev_err(&pdev->dev,
3021 			"Adapter initialization failed, error %d. Continuing in debug mode\n",
3022 			err);
3023 
3024 	/* Initialize hash mac addr list */
3025 	INIT_LIST_HEAD(&adapter->mac_hlist);
3026 
3027 	/*
3028 	 * Allocate our "adapter ports" and stitch everything together.
3029 	 */
3030 	pmask = cxgb4vf_get_port_mask(adapter);
3031 	for_each_port(adapter, pidx) {
3032 		int port_id, viid;
3033 		u8 mac[ETH_ALEN];
3034 		unsigned int naddr = 1;
3035 
3036 		/*
3037 		 * We simplistically allocate our virtual interfaces
3038 		 * sequentially across the port numbers to which we have
3039 		 * access rights.  This should be configurable in some manner
3040 		 * ...
3041 		 */
3042 		if (pmask == 0)
3043 			break;
3044 		port_id = ffs(pmask) - 1;
3045 		pmask &= ~(1 << port_id);
3046 
3047 		/*
3048 		 * Allocate our network device and stitch things together.
3049 		 */
3050 		netdev = alloc_etherdev_mq(sizeof(struct port_info),
3051 					   MAX_PORT_QSETS);
3052 		if (netdev == NULL) {
3053 			err = -ENOMEM;
3054 			goto err_free_dev;
3055 		}
3056 		adapter->port[pidx] = netdev;
3057 		SET_NETDEV_DEV(netdev, &pdev->dev);
3058 		pi = netdev_priv(netdev);
3059 		pi->adapter = adapter;
3060 		pi->pidx = pidx;
3061 		pi->port_id = port_id;
3062 
3063 		/*
3064 		 * Initialize the starting state of our "port" and register
3065 		 * it.
3066 		 */
3067 		pi->xact_addr_filt = -1;
3068 		netdev->irq = pdev->irq;
3069 
3070 		netdev->hw_features = NETIF_F_SG | TSO_FLAGS | NETIF_F_GRO |
3071 			NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
3072 			NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
3073 		netdev->features = netdev->hw_features | NETIF_F_HIGHDMA;
3074 		netdev->vlan_features = netdev->features & VLAN_FEAT;
3075 
3076 		netdev->priv_flags |= IFF_UNICAST_FLT;
3077 		netdev->min_mtu = 81;
3078 		netdev->max_mtu = ETH_MAX_MTU;
3079 
3080 		netdev->netdev_ops = &cxgb4vf_netdev_ops;
3081 		netdev->ethtool_ops = &cxgb4vf_ethtool_ops;
3082 		netdev->dev_port = pi->port_id;
3083 
3084 		/*
3085 		 * If we haven't been able to contact the firmware, there's
3086 		 * nothing else we can do for this "port" ...
3087 		 */
3088 		if (!(adapter->flags & CXGB4VF_FW_OK))
3089 			continue;
3090 
3091 		viid = t4vf_alloc_vi(adapter, port_id);
3092 		if (viid < 0) {
3093 			dev_err(&pdev->dev,
3094 				"cannot allocate VI for port %d: err=%d\n",
3095 				port_id, viid);
3096 			err = viid;
3097 			goto err_free_dev;
3098 		}
3099 		pi->viid = viid;
3100 
3101 		/*
3102 		 * Initialize the hardware/software state for the port.
3103 		 */
3104 		err = t4vf_port_init(adapter, pidx);
3105 		if (err) {
3106 			dev_err(&pdev->dev, "cannot initialize port %d\n",
3107 				pidx);
3108 			goto err_free_dev;
3109 		}
3110 
3111 		err = t4vf_get_vf_mac_acl(adapter, port_id, &naddr, mac);
3112 		if (err) {
3113 			dev_err(&pdev->dev,
3114 				"unable to determine MAC ACL address, "
3115 				"continuing anyway.. (status %d)\n", err);
3116 		} else if (naddr && adapter->params.vfres.nvi == 1) {
3117 			struct sockaddr addr;
3118 
3119 			ether_addr_copy(addr.sa_data, mac);
3120 			err = cxgb4vf_set_mac_addr(netdev, &addr);
3121 			if (err) {
3122 				dev_err(&pdev->dev,
3123 					"unable to set MAC address %pM\n",
3124 					mac);
3125 				goto err_free_dev;
3126 			}
3127 			dev_info(&pdev->dev,
3128 				 "Using assigned MAC ACL: %pM\n", mac);
3129 		}
3130 	}
3131 
3132 	/* See what interrupts we'll be using.  If we've been configured to
3133 	 * use MSI-X interrupts, try to enable them but fall back to using
3134 	 * MSI interrupts if we can't enable MSI-X interrupts.  If we can't
3135 	 * get MSI interrupts we bail with the error.
3136 	 */
3137 	if (msi == MSI_MSIX && enable_msix(adapter) == 0)
3138 		adapter->flags |= CXGB4VF_USING_MSIX;
3139 	else {
3140 		if (msi == MSI_MSIX) {
3141 			dev_info(adapter->pdev_dev,
3142 				 "Unable to use MSI-X Interrupts; falling "
3143 				 "back to MSI Interrupts\n");
3144 
3145 			/* We're going to need a Forwarded Interrupt Queue so
3146 			 * that may cut into how many Queue Sets we can
3147 			 * support.
3148 			 */
3149 			msi = MSI_MSI;
3150 			size_nports_qsets(adapter);
3151 		}
3152 		err = pci_enable_msi(pdev);
3153 		if (err) {
3154 			dev_err(&pdev->dev, "Unable to allocate MSI Interrupts;"
3155 				" err=%d\n", err);
3156 			goto err_free_dev;
3157 		}
3158 		adapter->flags |= CXGB4VF_USING_MSI;
3159 	}
3160 
3161 	/* Now that we know how many "ports" we have and what interrupt
3162 	 * mechanism we're going to use, we can configure our queue resources.
3163 	 */
3164 	cfg_queues(adapter);
3165 
3166 	/*
3167 	 * The "card" is now ready to go.  If any errors occur during device
3168 	 * registration we do not fail the whole "card" but rather proceed
3169 	 * only with the ports we manage to register successfully.  However we
3170 	 * must register at least one net device.
3171 	 */
3172 	for_each_port(adapter, pidx) {
3173 		struct port_info *pi = netdev_priv(adapter->port[pidx]);
3174 		netdev = adapter->port[pidx];
3175 		if (netdev == NULL)
3176 			continue;
3177 
3178 		netif_set_real_num_tx_queues(netdev, pi->nqsets);
3179 		netif_set_real_num_rx_queues(netdev, pi->nqsets);
3180 
3181 		err = register_netdev(netdev);
3182 		if (err) {
3183 			dev_warn(&pdev->dev, "cannot register net device %s,"
3184 				 " skipping\n", netdev->name);
3185 			continue;
3186 		}
3187 
3188 		netif_carrier_off(netdev);
3189 		set_bit(pidx, &adapter->registered_device_map);
3190 	}
3191 	if (adapter->registered_device_map == 0) {
3192 		dev_err(&pdev->dev, "could not register any net devices\n");
3193 		err = -EINVAL;
3194 		goto err_disable_interrupts;
3195 	}
3196 
3197 	/*
3198 	 * Set up our debugfs entries.
3199 	 */
3200 	if (!IS_ERR_OR_NULL(cxgb4vf_debugfs_root)) {
3201 		adapter->debugfs_root =
3202 			debugfs_create_dir(pci_name(pdev),
3203 					   cxgb4vf_debugfs_root);
3204 		setup_debugfs(adapter);
3205 	}
3206 
3207 	/*
3208 	 * Print a short notice on the existence and configuration of the new
3209 	 * VF network device ...
3210 	 */
3211 	for_each_port(adapter, pidx) {
3212 		dev_info(adapter->pdev_dev, "%s: Chelsio VF NIC PCIe %s\n",
3213 			 adapter->port[pidx]->name,
3214 			 (adapter->flags & CXGB4VF_USING_MSIX) ? "MSI-X" :
3215 			 (adapter->flags & CXGB4VF_USING_MSI)  ? "MSI" : "");
3216 	}
3217 
3218 	/*
3219 	 * Return success!
3220 	 */
3221 	return 0;
3222 
3223 	/*
3224 	 * Error recovery and exit code.  Unwind state that's been created
3225 	 * so far and return the error.
3226 	 */
3227 err_disable_interrupts:
3228 	if (adapter->flags & CXGB4VF_USING_MSIX) {
3229 		pci_disable_msix(adapter->pdev);
3230 		adapter->flags &= ~CXGB4VF_USING_MSIX;
3231 	} else if (adapter->flags & CXGB4VF_USING_MSI) {
3232 		pci_disable_msi(adapter->pdev);
3233 		adapter->flags &= ~CXGB4VF_USING_MSI;
3234 	}
3235 
3236 err_free_dev:
3237 	for_each_port(adapter, pidx) {
3238 		netdev = adapter->port[pidx];
3239 		if (netdev == NULL)
3240 			continue;
3241 		pi = netdev_priv(netdev);
3242 		if (pi->viid)
3243 			t4vf_free_vi(adapter, pi->viid);
3244 		if (test_bit(pidx, &adapter->registered_device_map))
3245 			unregister_netdev(netdev);
3246 		free_netdev(netdev);
3247 	}
3248 
3249 	if (!is_t4(adapter->params.chip))
3250 		iounmap(adapter->bar2);
3251 
3252 err_unmap_bar0:
3253 	iounmap(adapter->regs);
3254 
3255 err_free_adapter:
3256 	kfree(adapter->mbox_log);
3257 	kfree(adapter);
3258 
3259 err_release_regions:
3260 	pci_release_regions(pdev);
3261 
3262 err_disable_device:
3263 	pci_disable_device(pdev);
3264 
3265 	return err;
3266 }
3267 
3268 /*
3269  * "Remove" a device: tear down all kernel and driver state created in the
3270  * "probe" routine and quiesce the device (disable interrupts, etc.).  (Note
3271  * that this is called "remove_one" in the PF Driver.)
3272  */
cxgb4vf_pci_remove(struct pci_dev * pdev)3273 static void cxgb4vf_pci_remove(struct pci_dev *pdev)
3274 {
3275 	struct adapter *adapter = pci_get_drvdata(pdev);
3276 	struct hash_mac_addr *entry, *tmp;
3277 
3278 	/*
3279 	 * Tear down driver state associated with device.
3280 	 */
3281 	if (adapter) {
3282 		int pidx;
3283 
3284 		/*
3285 		 * Stop all of our activity.  Unregister network port,
3286 		 * disable interrupts, etc.
3287 		 */
3288 		for_each_port(adapter, pidx)
3289 			if (test_bit(pidx, &adapter->registered_device_map))
3290 				unregister_netdev(adapter->port[pidx]);
3291 		t4vf_sge_stop(adapter);
3292 		if (adapter->flags & CXGB4VF_USING_MSIX) {
3293 			pci_disable_msix(adapter->pdev);
3294 			adapter->flags &= ~CXGB4VF_USING_MSIX;
3295 		} else if (adapter->flags & CXGB4VF_USING_MSI) {
3296 			pci_disable_msi(adapter->pdev);
3297 			adapter->flags &= ~CXGB4VF_USING_MSI;
3298 		}
3299 
3300 		/*
3301 		 * Tear down our debugfs entries.
3302 		 */
3303 		if (!IS_ERR_OR_NULL(adapter->debugfs_root)) {
3304 			cleanup_debugfs(adapter);
3305 			debugfs_remove_recursive(adapter->debugfs_root);
3306 		}
3307 
3308 		/*
3309 		 * Free all of the various resources which we've acquired ...
3310 		 */
3311 		t4vf_free_sge_resources(adapter);
3312 		for_each_port(adapter, pidx) {
3313 			struct net_device *netdev = adapter->port[pidx];
3314 			struct port_info *pi;
3315 
3316 			if (netdev == NULL)
3317 				continue;
3318 
3319 			pi = netdev_priv(netdev);
3320 			if (pi->viid)
3321 				t4vf_free_vi(adapter, pi->viid);
3322 			free_netdev(netdev);
3323 		}
3324 		iounmap(adapter->regs);
3325 		if (!is_t4(adapter->params.chip))
3326 			iounmap(adapter->bar2);
3327 		kfree(adapter->mbox_log);
3328 		list_for_each_entry_safe(entry, tmp, &adapter->mac_hlist,
3329 					 list) {
3330 			list_del(&entry->list);
3331 			kfree(entry);
3332 		}
3333 		kfree(adapter);
3334 	}
3335 
3336 	/*
3337 	 * Disable the device and release its PCI resources.
3338 	 */
3339 	pci_disable_device(pdev);
3340 	pci_release_regions(pdev);
3341 }
3342 
3343 /*
3344  * "Shutdown" quiesce the device, stopping Ingress Packet and Interrupt
3345  * delivery.
3346  */
cxgb4vf_pci_shutdown(struct pci_dev * pdev)3347 static void cxgb4vf_pci_shutdown(struct pci_dev *pdev)
3348 {
3349 	struct adapter *adapter;
3350 	int pidx;
3351 
3352 	adapter = pci_get_drvdata(pdev);
3353 	if (!adapter)
3354 		return;
3355 
3356 	/* Disable all Virtual Interfaces.  This will shut down the
3357 	 * delivery of all ingress packets into the chip for these
3358 	 * Virtual Interfaces.
3359 	 */
3360 	for_each_port(adapter, pidx)
3361 		if (test_bit(pidx, &adapter->registered_device_map))
3362 			unregister_netdev(adapter->port[pidx]);
3363 
3364 	/* Free up all Queues which will prevent further DMA and
3365 	 * Interrupts allowing various internal pathways to drain.
3366 	 */
3367 	t4vf_sge_stop(adapter);
3368 	if (adapter->flags & CXGB4VF_USING_MSIX) {
3369 		pci_disable_msix(adapter->pdev);
3370 		adapter->flags &= ~CXGB4VF_USING_MSIX;
3371 	} else if (adapter->flags & CXGB4VF_USING_MSI) {
3372 		pci_disable_msi(adapter->pdev);
3373 		adapter->flags &= ~CXGB4VF_USING_MSI;
3374 	}
3375 
3376 	/*
3377 	 * Free up all Queues which will prevent further DMA and
3378 	 * Interrupts allowing various internal pathways to drain.
3379 	 */
3380 	t4vf_free_sge_resources(adapter);
3381 	pci_set_drvdata(pdev, NULL);
3382 }
3383 
3384 /* Macros needed to support the PCI Device ID Table ...
3385  */
3386 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
3387 	static const struct pci_device_id cxgb4vf_pci_tbl[] = {
3388 #define CH_PCI_DEVICE_ID_FUNCTION	0x8
3389 
3390 #define CH_PCI_ID_TABLE_ENTRY(devid) \
3391 		{ PCI_VDEVICE(CHELSIO, (devid)), 0 }
3392 
3393 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } }
3394 
3395 #include "../cxgb4/t4_pci_id_tbl.h"
3396 
3397 MODULE_DESCRIPTION(DRV_DESC);
3398 MODULE_AUTHOR("Chelsio Communications");
3399 MODULE_LICENSE("Dual BSD/GPL");
3400 MODULE_DEVICE_TABLE(pci, cxgb4vf_pci_tbl);
3401 
3402 static struct pci_driver cxgb4vf_driver = {
3403 	.name		= KBUILD_MODNAME,
3404 	.id_table	= cxgb4vf_pci_tbl,
3405 	.probe		= cxgb4vf_pci_probe,
3406 	.remove		= cxgb4vf_pci_remove,
3407 	.shutdown	= cxgb4vf_pci_shutdown,
3408 };
3409 
3410 /*
3411  * Initialize global driver state.
3412  */
cxgb4vf_module_init(void)3413 static int __init cxgb4vf_module_init(void)
3414 {
3415 	int ret;
3416 
3417 	/*
3418 	 * Vet our module parameters.
3419 	 */
3420 	if (msi != MSI_MSIX && msi != MSI_MSI) {
3421 		pr_warn("bad module parameter msi=%d; must be %d (MSI-X or MSI) or %d (MSI)\n",
3422 			msi, MSI_MSIX, MSI_MSI);
3423 		return -EINVAL;
3424 	}
3425 
3426 	/* Debugfs support is optional, debugfs will warn if this fails */
3427 	cxgb4vf_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
3428 
3429 	ret = pci_register_driver(&cxgb4vf_driver);
3430 	if (ret < 0)
3431 		debugfs_remove(cxgb4vf_debugfs_root);
3432 	return ret;
3433 }
3434 
3435 /*
3436  * Tear down global driver state.
3437  */
cxgb4vf_module_exit(void)3438 static void __exit cxgb4vf_module_exit(void)
3439 {
3440 	pci_unregister_driver(&cxgb4vf_driver);
3441 	debugfs_remove(cxgb4vf_debugfs_root);
3442 }
3443 
3444 module_init(cxgb4vf_module_init);
3445 module_exit(cxgb4vf_module_exit);
3446