1 /*
2 * Copyright (C) 2015 Cavium Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 *
28 */
29
30 /*
31 * Marvell/Cavium ThunderX vnic/bgx network controller
32 *
33 * UNIMPLEMENTED FEATURES
34 * ----------------------
35 * A number of features supported by the hardware are not yet implemented in
36 * this driver:
37 *
38 * - PR223573 multicast rx filter
39 * - PR223575 non-promiscuous mode (driver currently forces promisc)
40 */
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/bitset.h>
48 #include <sys/bitstring.h>
49 #include <sys/bus.h>
50 #include <sys/endian.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
53 #include <sys/module.h>
54 #include <sys/rman.h>
55 #include <sys/pciio.h>
56 #include <sys/pcpu.h>
57 #include <sys/proc.h>
58 #include <sys/socket.h>
59 #include <sys/sockio.h>
60 #include <sys/cpuset.h>
61 #include <sys/lock.h>
62 #include <sys/mutex.h>
63
64 #include <net/ethernet.h>
65 #include <net/if.h>
66 #include <net/if_media.h>
67
68 #include <machine/bus.h>
69 #include <machine/_inttypes.h>
70
71 #include <dev/pci/pcireg.h>
72 #include <dev/pci/pcivar.h>
73
74 #include <sys/dnv.h>
75 #include <sys/nv.h>
76 #ifdef PCI_IOV
77 #include <sys/iov_schema.h>
78 #include <dev/pci/pci_iov.h>
79 #endif
80
81 #include "thunder_bgx.h"
82 #include "nic_reg.h"
83 #include "nic.h"
84 #include "q_struct.h"
85
86 #define VNIC_PF_DEVSTR "Cavium Thunder NIC Physical Function Driver"
87
88 #define VNIC_PF_REG_RID PCIR_BAR(PCI_CFG_REG_BAR_NUM)
89
90 #define NIC_SET_VF_LMAC_MAP(bgx, lmac) ((((bgx) & 0xF) << 4) | ((lmac) & 0xF))
91 #define NIC_GET_BGX_FROM_VF_LMAC_MAP(map) (((map) >> 4) & 0xF)
92 #define NIC_GET_LMAC_FROM_VF_LMAC_MAP(map) ((map) & 0xF)
93
94 /* Structure to be used by the SR-IOV for VF configuration schemas */
95 struct nicvf_info {
96 boolean_t vf_enabled;
97 int vf_flags;
98 };
99
100 struct nicpf {
101 device_t dev;
102 uint8_t node;
103 u_int flags;
104 uint8_t num_vf_en; /* No of VF enabled */
105 struct nicvf_info vf_info[MAX_NUM_VFS_SUPPORTED];
106 struct resource * reg_base; /* Register start address */
107 struct pkind_cfg pkind;
108 uint8_t vf_lmac_map[MAX_LMAC];
109 boolean_t mbx_lock[MAX_NUM_VFS_SUPPORTED];
110
111 struct callout check_link;
112 struct mtx check_link_mtx;
113
114 uint8_t link[MAX_LMAC];
115 uint8_t duplex[MAX_LMAC];
116 uint32_t speed[MAX_LMAC];
117 uint16_t cpi_base[MAX_NUM_VFS_SUPPORTED];
118 uint16_t rssi_base[MAX_NUM_VFS_SUPPORTED];
119 uint16_t rss_ind_tbl_size;
120
121 /* MSI-X */
122 boolean_t msix_enabled;
123 uint8_t num_vec;
124 struct msix_entry msix_entries[NIC_PF_MSIX_VECTORS];
125 struct resource * msix_table_res;
126 };
127
128 static int nicpf_probe(device_t);
129 static int nicpf_attach(device_t);
130 static int nicpf_detach(device_t);
131
132 #ifdef PCI_IOV
133 static int nicpf_iov_init(device_t, uint16_t, const nvlist_t *);
134 static void nicpf_iov_uninit(device_t);
135 static int nicpf_iov_add_vf(device_t, uint16_t, const nvlist_t *);
136 #endif
137
138 static device_method_t nicpf_methods[] = {
139 /* Device interface */
140 DEVMETHOD(device_probe, nicpf_probe),
141 DEVMETHOD(device_attach, nicpf_attach),
142 DEVMETHOD(device_detach, nicpf_detach),
143 /* PCI SR-IOV interface */
144 #ifdef PCI_IOV
145 DEVMETHOD(pci_iov_init, nicpf_iov_init),
146 DEVMETHOD(pci_iov_uninit, nicpf_iov_uninit),
147 DEVMETHOD(pci_iov_add_vf, nicpf_iov_add_vf),
148 #endif
149 DEVMETHOD_END,
150 };
151
152 static driver_t vnicpf_driver = {
153 "vnicpf",
154 nicpf_methods,
155 sizeof(struct nicpf),
156 };
157
158 static devclass_t vnicpf_devclass;
159
160 DRIVER_MODULE(vnicpf, pci, vnicpf_driver, vnicpf_devclass, 0, 0);
161 MODULE_VERSION(vnicpf, 1);
162 MODULE_DEPEND(vnicpf, pci, 1, 1, 1);
163 MODULE_DEPEND(vnicpf, ether, 1, 1, 1);
164 MODULE_DEPEND(vnicpf, thunder_bgx, 1, 1, 1);
165
166 static int nicpf_alloc_res(struct nicpf *);
167 static void nicpf_free_res(struct nicpf *);
168 static void nic_set_lmac_vf_mapping(struct nicpf *);
169 static void nic_init_hw(struct nicpf *);
170 static int nic_sriov_init(device_t, struct nicpf *);
171 static void nic_poll_for_link(void *);
172 static int nic_register_interrupts(struct nicpf *);
173 static void nic_unregister_interrupts(struct nicpf *);
174
175 /*
176 * Device interface
177 */
178 static int
nicpf_probe(device_t dev)179 nicpf_probe(device_t dev)
180 {
181 uint16_t vendor_id;
182 uint16_t device_id;
183
184 vendor_id = pci_get_vendor(dev);
185 device_id = pci_get_device(dev);
186
187 if (vendor_id == PCI_VENDOR_ID_CAVIUM &&
188 device_id == PCI_DEVICE_ID_THUNDER_NIC_PF) {
189 device_set_desc(dev, VNIC_PF_DEVSTR);
190 return (BUS_PROBE_DEFAULT);
191 }
192
193 return (ENXIO);
194 }
195
196 static int
nicpf_attach(device_t dev)197 nicpf_attach(device_t dev)
198 {
199 struct nicpf *nic;
200 int err;
201
202 nic = device_get_softc(dev);
203 nic->dev = dev;
204
205 /* Enable bus mastering */
206 pci_enable_busmaster(dev);
207
208 /* Allocate PCI resources */
209 err = nicpf_alloc_res(nic);
210 if (err != 0) {
211 device_printf(dev, "Could not allocate PCI resources\n");
212 return (err);
213 }
214
215 nic->node = nic_get_node_id(nic->reg_base);
216
217 /* Enable Traffic Network Switch (TNS) bypass mode by default */
218 nic->flags &= ~NIC_TNS_ENABLED;
219 nic_set_lmac_vf_mapping(nic);
220
221 /* Initialize hardware */
222 nic_init_hw(nic);
223
224 /* Set RSS TBL size for each VF */
225 nic->rss_ind_tbl_size = NIC_MAX_RSS_IDR_TBL_SIZE;
226
227 /* Setup interrupts */
228 err = nic_register_interrupts(nic);
229 if (err != 0)
230 goto err_free_res;
231
232 /* Configure SRIOV */
233 err = nic_sriov_init(dev, nic);
234 if (err != 0)
235 goto err_free_intr;
236
237 if (nic->flags & NIC_TNS_ENABLED)
238 return (0);
239
240 mtx_init(&nic->check_link_mtx, "VNIC PF link poll", NULL, MTX_DEF);
241 /* Register physical link status poll callout */
242 callout_init_mtx(&nic->check_link, &nic->check_link_mtx, 0);
243 mtx_lock(&nic->check_link_mtx);
244 nic_poll_for_link(nic);
245 mtx_unlock(&nic->check_link_mtx);
246
247 return (0);
248
249 err_free_intr:
250 nic_unregister_interrupts(nic);
251 err_free_res:
252 nicpf_free_res(nic);
253 pci_disable_busmaster(dev);
254
255 return (err);
256 }
257
258 static int
nicpf_detach(device_t dev)259 nicpf_detach(device_t dev)
260 {
261 struct nicpf *nic;
262 int err;
263
264 err = 0;
265 nic = device_get_softc(dev);
266
267 callout_drain(&nic->check_link);
268 mtx_destroy(&nic->check_link_mtx);
269
270 nic_unregister_interrupts(nic);
271 nicpf_free_res(nic);
272 pci_disable_busmaster(dev);
273
274 #ifdef PCI_IOV
275 err = pci_iov_detach(dev);
276 if (err != 0)
277 device_printf(dev, "SR-IOV in use. Detach first.\n");
278 #endif
279 return (err);
280 }
281
282 /*
283 * SR-IOV interface
284 */
285 #ifdef PCI_IOV
286 static int
nicpf_iov_init(device_t dev,uint16_t num_vfs,const nvlist_t * params)287 nicpf_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params)
288 {
289 struct nicpf *nic;
290
291 nic = device_get_softc(dev);
292
293 if (num_vfs == 0)
294 return (ENXIO);
295
296 nic->flags |= NIC_SRIOV_ENABLED;
297
298 return (0);
299 }
300
301 static void
nicpf_iov_uninit(device_t dev)302 nicpf_iov_uninit(device_t dev)
303 {
304
305 /* ARM64TODO: Implement this function */
306 }
307
308 static int
nicpf_iov_add_vf(device_t dev,uint16_t vfnum,const nvlist_t * params)309 nicpf_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params)
310 {
311 const void *mac;
312 struct nicpf *nic;
313 size_t size;
314 int bgx, lmac;
315
316 nic = device_get_softc(dev);
317
318 if ((nic->flags & NIC_SRIOV_ENABLED) == 0)
319 return (ENXIO);
320
321 if (vfnum > (nic->num_vf_en - 1))
322 return (EINVAL);
323
324 if (nvlist_exists_binary(params, "mac-addr") != 0) {
325 mac = nvlist_get_binary(params, "mac-addr", &size);
326 bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vfnum]);
327 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vfnum]);
328 bgx_set_lmac_mac(nic->node, bgx, lmac, mac);
329 }
330
331 return (0);
332 }
333 #endif
334
335 /*
336 * Helper routines
337 */
338 static int
nicpf_alloc_res(struct nicpf * nic)339 nicpf_alloc_res(struct nicpf *nic)
340 {
341 device_t dev;
342 int rid;
343
344 dev = nic->dev;
345
346 rid = VNIC_PF_REG_RID;
347 nic->reg_base = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
348 RF_ACTIVE);
349 if (nic->reg_base == NULL) {
350 /* For verbose output print some more details */
351 if (bootverbose) {
352 device_printf(dev,
353 "Could not allocate registers memory\n");
354 }
355 return (ENXIO);
356 }
357
358 return (0);
359 }
360
361 static void
nicpf_free_res(struct nicpf * nic)362 nicpf_free_res(struct nicpf *nic)
363 {
364 device_t dev;
365
366 dev = nic->dev;
367
368 if (nic->reg_base != NULL) {
369 bus_release_resource(dev, SYS_RES_MEMORY,
370 rman_get_rid(nic->reg_base), nic->reg_base);
371 }
372 }
373
374 /* Register read/write APIs */
375 static __inline void
nic_reg_write(struct nicpf * nic,bus_space_handle_t offset,uint64_t val)376 nic_reg_write(struct nicpf *nic, bus_space_handle_t offset,
377 uint64_t val)
378 {
379
380 bus_write_8(nic->reg_base, offset, val);
381 }
382
383 static __inline uint64_t
nic_reg_read(struct nicpf * nic,uint64_t offset)384 nic_reg_read(struct nicpf *nic, uint64_t offset)
385 {
386 uint64_t val;
387
388 val = bus_read_8(nic->reg_base, offset);
389 return (val);
390 }
391
392 /* PF -> VF mailbox communication APIs */
393 static void
nic_enable_mbx_intr(struct nicpf * nic)394 nic_enable_mbx_intr(struct nicpf *nic)
395 {
396
397 /* Enable mailbox interrupt for all 128 VFs */
398 nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S, ~0UL);
399 nic_reg_write(nic, NIC_PF_MAILBOX_ENA_W1S + sizeof(uint64_t), ~0UL);
400 }
401
402 static void
nic_clear_mbx_intr(struct nicpf * nic,int vf,int mbx_reg)403 nic_clear_mbx_intr(struct nicpf *nic, int vf, int mbx_reg)
404 {
405
406 nic_reg_write(nic, NIC_PF_MAILBOX_INT + (mbx_reg << 3), (1UL << vf));
407 }
408
409 static uint64_t
nic_get_mbx_addr(int vf)410 nic_get_mbx_addr(int vf)
411 {
412
413 return (NIC_PF_VF_0_127_MAILBOX_0_1 + (vf << NIC_VF_NUM_SHIFT));
414 }
415
416 /*
417 * Send a mailbox message to VF
418 * @vf: vf to which this message to be sent
419 * @mbx: Message to be sent
420 */
421 static void
nic_send_msg_to_vf(struct nicpf * nic,int vf,union nic_mbx * mbx)422 nic_send_msg_to_vf(struct nicpf *nic, int vf, union nic_mbx *mbx)
423 {
424 bus_space_handle_t mbx_addr = nic_get_mbx_addr(vf);
425 uint64_t *msg = (uint64_t *)mbx;
426
427 /*
428 * In first revision HW, mbox interrupt is triggerred
429 * when PF writes to MBOX(1), in next revisions when
430 * PF writes to MBOX(0)
431 */
432 if (pass1_silicon(nic->dev)) {
433 nic_reg_write(nic, mbx_addr + 0, msg[0]);
434 nic_reg_write(nic, mbx_addr + 8, msg[1]);
435 } else {
436 nic_reg_write(nic, mbx_addr + 8, msg[1]);
437 nic_reg_write(nic, mbx_addr + 0, msg[0]);
438 }
439 }
440
441 /*
442 * Responds to VF's READY message with VF's
443 * ID, node, MAC address e.t.c
444 * @vf: VF which sent READY message
445 */
446 static void
nic_mbx_send_ready(struct nicpf * nic,int vf)447 nic_mbx_send_ready(struct nicpf *nic, int vf)
448 {
449 union nic_mbx mbx = {};
450 int bgx_idx, lmac;
451 const char *mac;
452
453 mbx.nic_cfg.msg = NIC_MBOX_MSG_READY;
454 mbx.nic_cfg.vf_id = vf;
455
456 if (nic->flags & NIC_TNS_ENABLED)
457 mbx.nic_cfg.tns_mode = NIC_TNS_MODE;
458 else
459 mbx.nic_cfg.tns_mode = NIC_TNS_BYPASS_MODE;
460
461 if (vf < MAX_LMAC) {
462 bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
463 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
464
465 mac = bgx_get_lmac_mac(nic->node, bgx_idx, lmac);
466 if (mac) {
467 memcpy((uint8_t *)&mbx.nic_cfg.mac_addr, mac,
468 ETHER_ADDR_LEN);
469 }
470 }
471 mbx.nic_cfg.node_id = nic->node;
472
473 mbx.nic_cfg.loopback_supported = vf < MAX_LMAC;
474
475 nic_send_msg_to_vf(nic, vf, &mbx);
476 }
477
478 /*
479 * ACKs VF's mailbox message
480 * @vf: VF to which ACK to be sent
481 */
482 static void
nic_mbx_send_ack(struct nicpf * nic,int vf)483 nic_mbx_send_ack(struct nicpf *nic, int vf)
484 {
485 union nic_mbx mbx = {};
486
487 mbx.msg.msg = NIC_MBOX_MSG_ACK;
488 nic_send_msg_to_vf(nic, vf, &mbx);
489 }
490
491 /*
492 * NACKs VF's mailbox message that PF is not able to
493 * complete the action
494 * @vf: VF to which ACK to be sent
495 */
496 static void
nic_mbx_send_nack(struct nicpf * nic,int vf)497 nic_mbx_send_nack(struct nicpf *nic, int vf)
498 {
499 union nic_mbx mbx = {};
500
501 mbx.msg.msg = NIC_MBOX_MSG_NACK;
502 nic_send_msg_to_vf(nic, vf, &mbx);
503 }
504
505 /*
506 * Flush all in flight receive packets to memory and
507 * bring down an active RQ
508 */
509 static int
nic_rcv_queue_sw_sync(struct nicpf * nic)510 nic_rcv_queue_sw_sync(struct nicpf *nic)
511 {
512 uint16_t timeout = ~0x00;
513
514 nic_reg_write(nic, NIC_PF_SW_SYNC_RX, 0x01);
515 /* Wait till sync cycle is finished */
516 while (timeout) {
517 if (nic_reg_read(nic, NIC_PF_SW_SYNC_RX_DONE) & 0x1)
518 break;
519 timeout--;
520 }
521 nic_reg_write(nic, NIC_PF_SW_SYNC_RX, 0x00);
522 if (!timeout) {
523 device_printf(nic->dev, "Receive queue software sync failed\n");
524 return (ETIMEDOUT);
525 }
526 return (0);
527 }
528
529 /* Get BGX Rx/Tx stats and respond to VF's request */
530 static void
nic_get_bgx_stats(struct nicpf * nic,struct bgx_stats_msg * bgx)531 nic_get_bgx_stats(struct nicpf *nic, struct bgx_stats_msg *bgx)
532 {
533 int bgx_idx, lmac;
534 union nic_mbx mbx = {};
535
536 bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[bgx->vf_id]);
537 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[bgx->vf_id]);
538
539 mbx.bgx_stats.msg = NIC_MBOX_MSG_BGX_STATS;
540 mbx.bgx_stats.vf_id = bgx->vf_id;
541 mbx.bgx_stats.rx = bgx->rx;
542 mbx.bgx_stats.idx = bgx->idx;
543 if (bgx->rx != 0) {
544 mbx.bgx_stats.stats =
545 bgx_get_rx_stats(nic->node, bgx_idx, lmac, bgx->idx);
546 } else {
547 mbx.bgx_stats.stats =
548 bgx_get_tx_stats(nic->node, bgx_idx, lmac, bgx->idx);
549 }
550 nic_send_msg_to_vf(nic, bgx->vf_id, &mbx);
551 }
552
553 /* Update hardware min/max frame size */
554 static int
nic_update_hw_frs(struct nicpf * nic,int new_frs,int vf)555 nic_update_hw_frs(struct nicpf *nic, int new_frs, int vf)
556 {
557
558 if ((new_frs > NIC_HW_MAX_FRS) || (new_frs < NIC_HW_MIN_FRS)) {
559 device_printf(nic->dev,
560 "Invalid MTU setting from VF%d rejected, "
561 "should be between %d and %d\n",
562 vf, NIC_HW_MIN_FRS, NIC_HW_MAX_FRS);
563 return (EINVAL);
564 }
565 new_frs += ETHER_HDR_LEN;
566 if (new_frs <= nic->pkind.maxlen)
567 return (0);
568
569 nic->pkind.maxlen = new_frs;
570 nic_reg_write(nic, NIC_PF_PKIND_0_15_CFG, *(uint64_t *)&nic->pkind);
571 return (0);
572 }
573
574 /* Set minimum transmit packet size */
575 static void
nic_set_tx_pkt_pad(struct nicpf * nic,int size)576 nic_set_tx_pkt_pad(struct nicpf *nic, int size)
577 {
578 int lmac;
579 uint64_t lmac_cfg;
580
581 /* Max value that can be set is 60 */
582 if (size > 60)
583 size = 60;
584
585 for (lmac = 0; lmac < (MAX_BGX_PER_CN88XX * MAX_LMAC_PER_BGX); lmac++) {
586 lmac_cfg = nic_reg_read(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3));
587 lmac_cfg &= ~(0xF << 2);
588 lmac_cfg |= ((size / 4) << 2);
589 nic_reg_write(nic, NIC_PF_LMAC_0_7_CFG | (lmac << 3), lmac_cfg);
590 }
591 }
592
593 /*
594 * Function to check number of LMACs present and set VF::LMAC mapping.
595 * Mapping will be used while initializing channels.
596 */
597 static void
nic_set_lmac_vf_mapping(struct nicpf * nic)598 nic_set_lmac_vf_mapping(struct nicpf *nic)
599 {
600 unsigned bgx_map = bgx_get_map(nic->node);
601 int bgx, next_bgx_lmac = 0;
602 int lmac, lmac_cnt = 0;
603 uint64_t lmac_credit;
604
605 nic->num_vf_en = 0;
606 if (nic->flags & NIC_TNS_ENABLED) {
607 nic->num_vf_en = DEFAULT_NUM_VF_ENABLED;
608 return;
609 }
610
611 for (bgx = 0; bgx < NIC_MAX_BGX; bgx++) {
612 if ((bgx_map & (1 << bgx)) == 0)
613 continue;
614 lmac_cnt = bgx_get_lmac_count(nic->node, bgx);
615 for (lmac = 0; lmac < lmac_cnt; lmac++)
616 nic->vf_lmac_map[next_bgx_lmac++] =
617 NIC_SET_VF_LMAC_MAP(bgx, lmac);
618 nic->num_vf_en += lmac_cnt;
619
620 /* Program LMAC credits */
621 lmac_credit = (1UL << 1); /* channel credit enable */
622 lmac_credit |= (0x1ff << 2); /* Max outstanding pkt count */
623 /* 48KB BGX Tx buffer size, each unit is of size 16bytes */
624 lmac_credit |= (((((48 * 1024) / lmac_cnt) -
625 NIC_HW_MAX_FRS) / 16) << 12);
626 lmac = bgx * MAX_LMAC_PER_BGX;
627 for (; lmac < lmac_cnt + (bgx * MAX_LMAC_PER_BGX); lmac++) {
628 nic_reg_write(nic, NIC_PF_LMAC_0_7_CREDIT + (lmac * 8),
629 lmac_credit);
630 }
631 }
632 }
633
634 #define TNS_PORT0_BLOCK 6
635 #define TNS_PORT1_BLOCK 7
636 #define BGX0_BLOCK 8
637 #define BGX1_BLOCK 9
638
639 static void
nic_init_hw(struct nicpf * nic)640 nic_init_hw(struct nicpf *nic)
641 {
642 int i;
643
644 /* Enable NIC HW block */
645 nic_reg_write(nic, NIC_PF_CFG, 0x3);
646
647 /* Enable backpressure */
648 nic_reg_write(nic, NIC_PF_BP_CFG, (1UL << 6) | 0x03);
649
650 if (nic->flags & NIC_TNS_ENABLED) {
651 nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG,
652 (NIC_TNS_MODE << 7) | TNS_PORT0_BLOCK);
653 nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG | (1 << 8),
654 (NIC_TNS_MODE << 7) | TNS_PORT1_BLOCK);
655 nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG,
656 (1UL << 63) | TNS_PORT0_BLOCK);
657 nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG + (1 << 8),
658 (1UL << 63) | TNS_PORT1_BLOCK);
659
660 } else {
661 /* Disable TNS mode on both interfaces */
662 nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG,
663 (NIC_TNS_BYPASS_MODE << 7) | BGX0_BLOCK);
664 nic_reg_write(nic, NIC_PF_INTF_0_1_SEND_CFG | (1 << 8),
665 (NIC_TNS_BYPASS_MODE << 7) | BGX1_BLOCK);
666 nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG,
667 (1UL << 63) | BGX0_BLOCK);
668 nic_reg_write(nic, NIC_PF_INTF_0_1_BP_CFG + (1 << 8),
669 (1UL << 63) | BGX1_BLOCK);
670 }
671
672 /* PKIND configuration */
673 nic->pkind.minlen = 0;
674 nic->pkind.maxlen = NIC_HW_MAX_FRS + ETHER_HDR_LEN;
675 nic->pkind.lenerr_en = 1;
676 nic->pkind.rx_hdr = 0;
677 nic->pkind.hdr_sl = 0;
678
679 for (i = 0; i < NIC_MAX_PKIND; i++) {
680 nic_reg_write(nic, NIC_PF_PKIND_0_15_CFG | (i << 3),
681 *(uint64_t *)&nic->pkind);
682 }
683
684 nic_set_tx_pkt_pad(nic, NIC_HW_MIN_FRS);
685
686 /* Timer config */
687 nic_reg_write(nic, NIC_PF_INTR_TIMER_CFG, NICPF_CLK_PER_INT_TICK);
688
689 /* Enable VLAN ethertype matching and stripping */
690 nic_reg_write(nic, NIC_PF_RX_ETYPE_0_7,
691 (2 << 19) | (ETYPE_ALG_VLAN_STRIP << 16) | ETHERTYPE_VLAN);
692 }
693
694 /* Channel parse index configuration */
695 static void
nic_config_cpi(struct nicpf * nic,struct cpi_cfg_msg * cfg)696 nic_config_cpi(struct nicpf *nic, struct cpi_cfg_msg *cfg)
697 {
698 uint32_t vnic, bgx, lmac, chan;
699 uint32_t padd, cpi_count = 0;
700 uint64_t cpi_base, cpi, rssi_base, rssi;
701 uint8_t qset, rq_idx = 0;
702
703 vnic = cfg->vf_id;
704 bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);
705 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);
706
707 chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
708 cpi_base = (lmac * NIC_MAX_CPI_PER_LMAC) + (bgx * NIC_CPI_PER_BGX);
709 rssi_base = (lmac * nic->rss_ind_tbl_size) + (bgx * NIC_RSSI_PER_BGX);
710
711 /* Rx channel configuration */
712 nic_reg_write(nic, NIC_PF_CHAN_0_255_RX_BP_CFG | (chan << 3),
713 (1UL << 63) | (vnic << 0));
714 nic_reg_write(nic, NIC_PF_CHAN_0_255_RX_CFG | (chan << 3),
715 ((uint64_t)cfg->cpi_alg << 62) | (cpi_base << 48));
716
717 if (cfg->cpi_alg == CPI_ALG_NONE)
718 cpi_count = 1;
719 else if (cfg->cpi_alg == CPI_ALG_VLAN) /* 3 bits of PCP */
720 cpi_count = 8;
721 else if (cfg->cpi_alg == CPI_ALG_VLAN16) /* 3 bits PCP + DEI */
722 cpi_count = 16;
723 else if (cfg->cpi_alg == CPI_ALG_DIFF) /* 6bits DSCP */
724 cpi_count = NIC_MAX_CPI_PER_LMAC;
725
726 /* RSS Qset, Qidx mapping */
727 qset = cfg->vf_id;
728 rssi = rssi_base;
729 for (; rssi < (rssi_base + cfg->rq_cnt); rssi++) {
730 nic_reg_write(nic, NIC_PF_RSSI_0_4097_RQ | (rssi << 3),
731 (qset << 3) | rq_idx);
732 rq_idx++;
733 }
734
735 rssi = 0;
736 cpi = cpi_base;
737 for (; cpi < (cpi_base + cpi_count); cpi++) {
738 /* Determine port to channel adder */
739 if (cfg->cpi_alg != CPI_ALG_DIFF)
740 padd = cpi % cpi_count;
741 else
742 padd = cpi % 8; /* 3 bits CS out of 6bits DSCP */
743
744 /* Leave RSS_SIZE as '0' to disable RSS */
745 if (pass1_silicon(nic->dev)) {
746 nic_reg_write(nic, NIC_PF_CPI_0_2047_CFG | (cpi << 3),
747 (vnic << 24) | (padd << 16) | (rssi_base + rssi));
748 } else {
749 /* Set MPI_ALG to '0' to disable MCAM parsing */
750 nic_reg_write(nic, NIC_PF_CPI_0_2047_CFG | (cpi << 3),
751 (padd << 16));
752 /* MPI index is same as CPI if MPI_ALG is not enabled */
753 nic_reg_write(nic, NIC_PF_MPI_0_2047_CFG | (cpi << 3),
754 (vnic << 24) | (rssi_base + rssi));
755 }
756
757 if ((rssi + 1) >= cfg->rq_cnt)
758 continue;
759
760 if (cfg->cpi_alg == CPI_ALG_VLAN)
761 rssi++;
762 else if (cfg->cpi_alg == CPI_ALG_VLAN16)
763 rssi = ((cpi - cpi_base) & 0xe) >> 1;
764 else if (cfg->cpi_alg == CPI_ALG_DIFF)
765 rssi = ((cpi - cpi_base) & 0x38) >> 3;
766 }
767 nic->cpi_base[cfg->vf_id] = cpi_base;
768 nic->rssi_base[cfg->vf_id] = rssi_base;
769 }
770
771 /* Responsds to VF with its RSS indirection table size */
772 static void
nic_send_rss_size(struct nicpf * nic,int vf)773 nic_send_rss_size(struct nicpf *nic, int vf)
774 {
775 union nic_mbx mbx = {};
776
777 mbx.rss_size.msg = NIC_MBOX_MSG_RSS_SIZE;
778 mbx.rss_size.ind_tbl_size = nic->rss_ind_tbl_size;
779 nic_send_msg_to_vf(nic, vf, &mbx);
780 }
781
782 /*
783 * Receive side scaling configuration
784 * configure:
785 * - RSS index
786 * - indir table i.e hash::RQ mapping
787 * - no of hash bits to consider
788 */
789 static void
nic_config_rss(struct nicpf * nic,struct rss_cfg_msg * cfg)790 nic_config_rss(struct nicpf *nic, struct rss_cfg_msg *cfg)
791 {
792 uint8_t qset, idx;
793 uint64_t cpi_cfg, cpi_base, rssi_base, rssi;
794 uint64_t idx_addr;
795
796 idx = 0;
797 rssi_base = nic->rssi_base[cfg->vf_id] + cfg->tbl_offset;
798
799 rssi = rssi_base;
800 qset = cfg->vf_id;
801
802 for (; rssi < (rssi_base + cfg->tbl_len); rssi++) {
803 nic_reg_write(nic, NIC_PF_RSSI_0_4097_RQ | (rssi << 3),
804 (qset << 3) | (cfg->ind_tbl[idx] & 0x7));
805 idx++;
806 }
807
808 cpi_base = nic->cpi_base[cfg->vf_id];
809 if (pass1_silicon(nic->dev))
810 idx_addr = NIC_PF_CPI_0_2047_CFG;
811 else
812 idx_addr = NIC_PF_MPI_0_2047_CFG;
813 cpi_cfg = nic_reg_read(nic, idx_addr | (cpi_base << 3));
814 cpi_cfg &= ~(0xFUL << 20);
815 cpi_cfg |= (cfg->hash_bits << 20);
816 nic_reg_write(nic, idx_addr | (cpi_base << 3), cpi_cfg);
817 }
818
819 /*
820 * 4 level transmit side scheduler configutation
821 * for TNS bypass mode
822 *
823 * Sample configuration for SQ0
824 * VNIC0-SQ0 -> TL4(0) -> TL3[0] -> TL2[0] -> TL1[0] -> BGX0
825 * VNIC1-SQ0 -> TL4(8) -> TL3[2] -> TL2[0] -> TL1[0] -> BGX0
826 * VNIC2-SQ0 -> TL4(16) -> TL3[4] -> TL2[1] -> TL1[0] -> BGX0
827 * VNIC3-SQ0 -> TL4(24) -> TL3[6] -> TL2[1] -> TL1[0] -> BGX0
828 * VNIC4-SQ0 -> TL4(512) -> TL3[128] -> TL2[32] -> TL1[1] -> BGX1
829 * VNIC5-SQ0 -> TL4(520) -> TL3[130] -> TL2[32] -> TL1[1] -> BGX1
830 * VNIC6-SQ0 -> TL4(528) -> TL3[132] -> TL2[33] -> TL1[1] -> BGX1
831 * VNIC7-SQ0 -> TL4(536) -> TL3[134] -> TL2[33] -> TL1[1] -> BGX1
832 */
833 static void
nic_tx_channel_cfg(struct nicpf * nic,uint8_t vnic,struct sq_cfg_msg * sq)834 nic_tx_channel_cfg(struct nicpf *nic, uint8_t vnic, struct sq_cfg_msg *sq)
835 {
836 uint32_t bgx, lmac, chan;
837 uint32_t tl2, tl3, tl4;
838 uint32_t rr_quantum;
839 uint8_t sq_idx = sq->sq_num;
840 uint8_t pqs_vnic;
841
842 pqs_vnic = vnic;
843
844 bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]);
845 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[pqs_vnic]);
846
847 /* 24 bytes for FCS, IPG and preamble */
848 rr_quantum = ((NIC_HW_MAX_FRS + 24) / 4);
849
850 tl4 = (lmac * NIC_TL4_PER_LMAC) + (bgx * NIC_TL4_PER_BGX);
851 tl4 += sq_idx;
852
853 tl3 = tl4 / (NIC_MAX_TL4 / NIC_MAX_TL3);
854 nic_reg_write(nic, NIC_PF_QSET_0_127_SQ_0_7_CFG2 |
855 ((uint64_t)vnic << NIC_QS_ID_SHIFT) |
856 ((uint32_t)sq_idx << NIC_Q_NUM_SHIFT), tl4);
857 nic_reg_write(nic, NIC_PF_TL4_0_1023_CFG | (tl4 << 3),
858 ((uint64_t)vnic << 27) | ((uint32_t)sq_idx << 24) | rr_quantum);
859
860 nic_reg_write(nic, NIC_PF_TL3_0_255_CFG | (tl3 << 3), rr_quantum);
861 chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
862 nic_reg_write(nic, NIC_PF_TL3_0_255_CHAN | (tl3 << 3), chan);
863 /* Enable backpressure on the channel */
864 nic_reg_write(nic, NIC_PF_CHAN_0_255_TX_CFG | (chan << 3), 1);
865
866 tl2 = tl3 >> 2;
867 nic_reg_write(nic, NIC_PF_TL3A_0_63_CFG | (tl2 << 3), tl2);
868 nic_reg_write(nic, NIC_PF_TL2_0_63_CFG | (tl2 << 3), rr_quantum);
869 /* No priorities as of now */
870 nic_reg_write(nic, NIC_PF_TL2_0_63_PRI | (tl2 << 3), 0x00);
871 }
872
873 static int
nic_config_loopback(struct nicpf * nic,struct set_loopback * lbk)874 nic_config_loopback(struct nicpf *nic, struct set_loopback *lbk)
875 {
876 int bgx_idx, lmac_idx;
877
878 if (lbk->vf_id > MAX_LMAC)
879 return (ENXIO);
880
881 bgx_idx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lbk->vf_id]);
882 lmac_idx = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lbk->vf_id]);
883
884 bgx_lmac_internal_loopback(nic->node, bgx_idx, lmac_idx, lbk->enable);
885
886 return (0);
887 }
888
889 /* Interrupt handler to handle mailbox messages from VFs */
890 static void
nic_handle_mbx_intr(struct nicpf * nic,int vf)891 nic_handle_mbx_intr(struct nicpf *nic, int vf)
892 {
893 union nic_mbx mbx = {};
894 uint64_t *mbx_data;
895 uint64_t mbx_addr;
896 uint64_t reg_addr;
897 uint64_t cfg;
898 int bgx, lmac;
899 int i;
900 int ret = 0;
901
902 nic->mbx_lock[vf] = TRUE;
903
904 mbx_addr = nic_get_mbx_addr(vf);
905 mbx_data = (uint64_t *)&mbx;
906
907 for (i = 0; i < NIC_PF_VF_MAILBOX_SIZE; i++) {
908 *mbx_data = nic_reg_read(nic, mbx_addr);
909 mbx_data++;
910 mbx_addr += sizeof(uint64_t);
911 }
912
913 switch (mbx.msg.msg) {
914 case NIC_MBOX_MSG_READY:
915 nic_mbx_send_ready(nic, vf);
916 if (vf < MAX_LMAC) {
917 nic->link[vf] = 0;
918 nic->duplex[vf] = 0;
919 nic->speed[vf] = 0;
920 }
921 ret = 1;
922 break;
923 case NIC_MBOX_MSG_QS_CFG:
924 reg_addr = NIC_PF_QSET_0_127_CFG |
925 (mbx.qs.num << NIC_QS_ID_SHIFT);
926 cfg = mbx.qs.cfg;
927 nic_reg_write(nic, reg_addr, cfg);
928 break;
929 case NIC_MBOX_MSG_RQ_CFG:
930 reg_addr = NIC_PF_QSET_0_127_RQ_0_7_CFG |
931 (mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
932 (mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
933 nic_reg_write(nic, reg_addr, mbx.rq.cfg);
934 break;
935 case NIC_MBOX_MSG_RQ_BP_CFG:
936 reg_addr = NIC_PF_QSET_0_127_RQ_0_7_BP_CFG |
937 (mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
938 (mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
939 nic_reg_write(nic, reg_addr, mbx.rq.cfg);
940 break;
941 case NIC_MBOX_MSG_RQ_SW_SYNC:
942 ret = nic_rcv_queue_sw_sync(nic);
943 break;
944 case NIC_MBOX_MSG_RQ_DROP_CFG:
945 reg_addr = NIC_PF_QSET_0_127_RQ_0_7_DROP_CFG |
946 (mbx.rq.qs_num << NIC_QS_ID_SHIFT) |
947 (mbx.rq.rq_num << NIC_Q_NUM_SHIFT);
948 nic_reg_write(nic, reg_addr, mbx.rq.cfg);
949 break;
950 case NIC_MBOX_MSG_SQ_CFG:
951 reg_addr = NIC_PF_QSET_0_127_SQ_0_7_CFG |
952 (mbx.sq.qs_num << NIC_QS_ID_SHIFT) |
953 (mbx.sq.sq_num << NIC_Q_NUM_SHIFT);
954 nic_reg_write(nic, reg_addr, mbx.sq.cfg);
955 nic_tx_channel_cfg(nic, mbx.qs.num, &mbx.sq);
956 break;
957 case NIC_MBOX_MSG_SET_MAC:
958 lmac = mbx.mac.vf_id;
959 bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]);
960 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[lmac]);
961 bgx_set_lmac_mac(nic->node, bgx, lmac, mbx.mac.mac_addr);
962 break;
963 case NIC_MBOX_MSG_SET_MAX_FRS:
964 ret = nic_update_hw_frs(nic, mbx.frs.max_frs, mbx.frs.vf_id);
965 break;
966 case NIC_MBOX_MSG_CPI_CFG:
967 nic_config_cpi(nic, &mbx.cpi_cfg);
968 break;
969 case NIC_MBOX_MSG_RSS_SIZE:
970 nic_send_rss_size(nic, vf);
971 goto unlock;
972 case NIC_MBOX_MSG_RSS_CFG:
973 case NIC_MBOX_MSG_RSS_CFG_CONT: /* fall through */
974 nic_config_rss(nic, &mbx.rss_cfg);
975 break;
976 case NIC_MBOX_MSG_CFG_DONE:
977 /* Last message of VF config msg sequence */
978 nic->vf_info[vf].vf_enabled = TRUE;
979 goto unlock;
980 case NIC_MBOX_MSG_SHUTDOWN:
981 /* First msg in VF teardown sequence */
982 nic->vf_info[vf].vf_enabled = FALSE;
983 break;
984 case NIC_MBOX_MSG_BGX_STATS:
985 nic_get_bgx_stats(nic, &mbx.bgx_stats);
986 goto unlock;
987 case NIC_MBOX_MSG_LOOPBACK:
988 ret = nic_config_loopback(nic, &mbx.lbk);
989 break;
990 default:
991 device_printf(nic->dev,
992 "Invalid msg from VF%d, msg 0x%x\n", vf, mbx.msg.msg);
993 break;
994 }
995
996 if (ret == 0)
997 nic_mbx_send_ack(nic, vf);
998 else if (mbx.msg.msg != NIC_MBOX_MSG_READY)
999 nic_mbx_send_nack(nic, vf);
1000 unlock:
1001 nic->mbx_lock[vf] = FALSE;
1002 }
1003
1004 static void
nic_mbx_intr_handler(struct nicpf * nic,int mbx)1005 nic_mbx_intr_handler(struct nicpf *nic, int mbx)
1006 {
1007 uint64_t intr;
1008 uint8_t vf, vf_per_mbx_reg = 64;
1009
1010 intr = nic_reg_read(nic, NIC_PF_MAILBOX_INT + (mbx << 3));
1011 for (vf = 0; vf < vf_per_mbx_reg; vf++) {
1012 if (intr & (1UL << vf)) {
1013 nic_handle_mbx_intr(nic, vf + (mbx * vf_per_mbx_reg));
1014 nic_clear_mbx_intr(nic, vf, mbx);
1015 }
1016 }
1017 }
1018
1019 static void
nic_mbx0_intr_handler(void * arg)1020 nic_mbx0_intr_handler (void *arg)
1021 {
1022 struct nicpf *nic = (struct nicpf *)arg;
1023
1024 nic_mbx_intr_handler(nic, 0);
1025 }
1026
1027 static void
nic_mbx1_intr_handler(void * arg)1028 nic_mbx1_intr_handler (void *arg)
1029 {
1030 struct nicpf *nic = (struct nicpf *)arg;
1031
1032 nic_mbx_intr_handler(nic, 1);
1033 }
1034
1035 static int
nic_enable_msix(struct nicpf * nic)1036 nic_enable_msix(struct nicpf *nic)
1037 {
1038 struct pci_devinfo *dinfo;
1039 int rid, count;
1040 int ret;
1041
1042 dinfo = device_get_ivars(nic->dev);
1043 rid = dinfo->cfg.msix.msix_table_bar;
1044 nic->msix_table_res =
1045 bus_alloc_resource_any(nic->dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
1046 if (nic->msix_table_res == NULL) {
1047 device_printf(nic->dev,
1048 "Could not allocate memory for MSI-X table\n");
1049 return (ENXIO);
1050 }
1051
1052 count = nic->num_vec = NIC_PF_MSIX_VECTORS;
1053
1054 ret = pci_alloc_msix(nic->dev, &count);
1055 if ((ret != 0) || (count != nic->num_vec)) {
1056 device_printf(nic->dev,
1057 "Request for #%d msix vectors failed, error: %d\n",
1058 nic->num_vec, ret);
1059 return (ret);
1060 }
1061
1062 nic->msix_enabled = 1;
1063 return (0);
1064 }
1065
1066 static void
nic_disable_msix(struct nicpf * nic)1067 nic_disable_msix(struct nicpf *nic)
1068 {
1069 if (nic->msix_enabled) {
1070 pci_release_msi(nic->dev);
1071 nic->msix_enabled = 0;
1072 nic->num_vec = 0;
1073 }
1074
1075 bus_release_resource(nic->dev, SYS_RES_MEMORY,
1076 rman_get_rid(nic->msix_table_res), nic->msix_table_res);
1077 }
1078
1079 static void
nic_free_all_interrupts(struct nicpf * nic)1080 nic_free_all_interrupts(struct nicpf *nic)
1081 {
1082 int irq;
1083
1084 for (irq = 0; irq < nic->num_vec; irq++) {
1085 if (nic->msix_entries[irq].irq_res == NULL)
1086 continue;
1087 if (nic->msix_entries[irq].handle != NULL) {
1088 bus_teardown_intr(nic->dev,
1089 nic->msix_entries[irq].irq_res,
1090 nic->msix_entries[irq].handle);
1091 }
1092
1093 bus_release_resource(nic->dev, SYS_RES_IRQ, irq + 1,
1094 nic->msix_entries[irq].irq_res);
1095 }
1096 }
1097
1098 static int
nic_register_interrupts(struct nicpf * nic)1099 nic_register_interrupts(struct nicpf *nic)
1100 {
1101 int irq, rid;
1102 int ret;
1103
1104 /* Enable MSI-X */
1105 ret = nic_enable_msix(nic);
1106 if (ret != 0)
1107 return (ret);
1108
1109 /* Register mailbox interrupt handlers */
1110 irq = NIC_PF_INTR_ID_MBOX0;
1111 rid = irq + 1;
1112 nic->msix_entries[irq].irq_res = bus_alloc_resource_any(nic->dev,
1113 SYS_RES_IRQ, &rid, (RF_SHAREABLE | RF_ACTIVE));
1114 if (nic->msix_entries[irq].irq_res == NULL) {
1115 ret = ENXIO;
1116 goto fail;
1117 }
1118 ret = bus_setup_intr(nic->dev, nic->msix_entries[irq].irq_res,
1119 (INTR_MPSAFE | INTR_TYPE_MISC), NULL, nic_mbx0_intr_handler, nic,
1120 &nic->msix_entries[irq].handle);
1121 if (ret != 0)
1122 goto fail;
1123
1124 irq = NIC_PF_INTR_ID_MBOX1;
1125 rid = irq + 1;
1126 nic->msix_entries[irq].irq_res = bus_alloc_resource_any(nic->dev,
1127 SYS_RES_IRQ, &rid, (RF_SHAREABLE | RF_ACTIVE));
1128 if (nic->msix_entries[irq].irq_res == NULL) {
1129 ret = ENXIO;
1130 goto fail;
1131 }
1132 ret = bus_setup_intr(nic->dev, nic->msix_entries[irq].irq_res,
1133 (INTR_MPSAFE | INTR_TYPE_MISC), NULL, nic_mbx1_intr_handler, nic,
1134 &nic->msix_entries[irq].handle);
1135 if (ret != 0)
1136 goto fail;
1137
1138 /* Enable mailbox interrupt */
1139 nic_enable_mbx_intr(nic);
1140 return (0);
1141
1142 fail:
1143 nic_free_all_interrupts(nic);
1144 return (ret);
1145 }
1146
1147 static void
nic_unregister_interrupts(struct nicpf * nic)1148 nic_unregister_interrupts(struct nicpf *nic)
1149 {
1150
1151 nic_free_all_interrupts(nic);
1152 nic_disable_msix(nic);
1153 }
1154
nic_sriov_init(device_t dev,struct nicpf * nic)1155 static int nic_sriov_init(device_t dev, struct nicpf *nic)
1156 {
1157 #ifdef PCI_IOV
1158 nvlist_t *pf_schema, *vf_schema;
1159 int iov_pos;
1160 int err;
1161 uint16_t total_vf_cnt;
1162
1163 err = pci_find_extcap(dev, PCIZ_SRIOV, &iov_pos);
1164 if (err != 0) {
1165 device_printf(dev,
1166 "SR-IOV capability is not found in PCIe config space\n");
1167 return (err);
1168 }
1169 /* Fix-up the number of enabled VFs */
1170 total_vf_cnt = pci_read_config(dev, iov_pos + PCIR_SRIOV_TOTAL_VFS, 2);
1171 if (total_vf_cnt == 0)
1172 return (ENXIO);
1173
1174 /* Attach SR-IOV */
1175 pf_schema = pci_iov_schema_alloc_node();
1176 vf_schema = pci_iov_schema_alloc_node();
1177 pci_iov_schema_add_unicast_mac(vf_schema, "mac-addr", 0, NULL);
1178 /*
1179 * All VFs can change their MACs.
1180 * This flag will be ignored but we set it just for the record.
1181 */
1182 pci_iov_schema_add_bool(vf_schema, "allow-set-mac",
1183 IOV_SCHEMA_HASDEFAULT, TRUE);
1184
1185 err = pci_iov_attach(dev, pf_schema, vf_schema);
1186 if (err != 0) {
1187 device_printf(dev,
1188 "Failed to initialize SR-IOV (error=%d)\n",
1189 err);
1190 return (err);
1191 }
1192 #endif
1193 return (0);
1194 }
1195
1196 /*
1197 * Poll for BGX LMAC link status and update corresponding VF
1198 * if there is a change, valid only if internal L2 switch
1199 * is not present otherwise VF link is always treated as up
1200 */
1201 static void
nic_poll_for_link(void * arg)1202 nic_poll_for_link(void *arg)
1203 {
1204 union nic_mbx mbx = {};
1205 struct nicpf *nic;
1206 struct bgx_link_status link;
1207 uint8_t vf, bgx, lmac;
1208
1209 nic = (struct nicpf *)arg;
1210
1211 mbx.link_status.msg = NIC_MBOX_MSG_BGX_LINK_CHANGE;
1212
1213 for (vf = 0; vf < nic->num_vf_en; vf++) {
1214 /* Poll only if VF is UP */
1215 if (!nic->vf_info[vf].vf_enabled)
1216 continue;
1217
1218 /* Get BGX, LMAC indices for the VF */
1219 bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
1220 lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vf]);
1221 /* Get interface link status */
1222 bgx_get_lmac_link_state(nic->node, bgx, lmac, &link);
1223
1224 /* Inform VF only if link status changed */
1225 if (nic->link[vf] == link.link_up)
1226 continue;
1227
1228 if (!nic->mbx_lock[vf]) {
1229 nic->link[vf] = link.link_up;
1230 nic->duplex[vf] = link.duplex;
1231 nic->speed[vf] = link.speed;
1232
1233 /* Send a mbox message to VF with current link status */
1234 mbx.link_status.link_up = link.link_up;
1235 mbx.link_status.duplex = link.duplex;
1236 mbx.link_status.speed = link.speed;
1237 nic_send_msg_to_vf(nic, vf, &mbx);
1238 }
1239 }
1240 callout_reset(&nic->check_link, hz * 2, nic_poll_for_link, nic);
1241 }
1242