1 /*-
2 * Copyright (c) 2010-2011 Juli Mallett <jmallett@FreeBSD.org>
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: releng/9.0/sys/mips/cavium/if_octm.c 219706 2011-03-16 22:51:34Z jmallett $
27 */
28
29 /*
30 * Cavium Octeon management port Ethernet devices.
31 */
32
33 #include "opt_inet.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/endian.h>
39 #include <sys/kernel.h>
40 #include <sys/mbuf.h>
41 #include <sys/lock.h>
42 #include <sys/module.h>
43 #include <sys/mutex.h>
44 #include <sys/rman.h>
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/sysctl.h>
48
49 #include <net/bpf.h>
50 #include <net/ethernet.h>
51 #include <net/if.h>
52 #include <net/if_dl.h>
53 #include <net/if_media.h>
54 #include <net/if_types.h>
55 #include <net/if_var.h>
56 #include <net/if_vlan_var.h>
57
58 #ifdef INET
59 #include <netinet/in.h>
60 #include <netinet/if_ether.h>
61 #endif
62
63 #include <contrib/octeon-sdk/cvmx.h>
64 #include <contrib/octeon-sdk/cvmx-interrupt.h>
65 #include <contrib/octeon-sdk/cvmx-mgmt-port.h>
66
67 extern cvmx_bootinfo_t *octeon_bootinfo;
68
69 struct octm_softc {
70 struct ifnet *sc_ifp;
71 device_t sc_dev;
72 unsigned sc_port;
73 int sc_flags;
74 struct ifmedia sc_ifmedia;
75 struct resource *sc_intr;
76 void *sc_intr_cookie;
77 };
78
79 static void octm_identify(driver_t *, device_t);
80 static int octm_probe(device_t);
81 static int octm_attach(device_t);
82 static int octm_detach(device_t);
83 static int octm_shutdown(device_t);
84
85 static void octm_init(void *);
86 static int octm_transmit(struct ifnet *, struct mbuf *);
87
88 static int octm_medchange(struct ifnet *);
89 static void octm_medstat(struct ifnet *, struct ifmediareq *);
90
91 static int octm_ioctl(struct ifnet *, u_long, caddr_t);
92
93 static void octm_rx_intr(void *);
94
95 static device_method_t octm_methods[] = {
96 /* Device interface */
97 DEVMETHOD(device_identify, octm_identify),
98 DEVMETHOD(device_probe, octm_probe),
99 DEVMETHOD(device_attach, octm_attach),
100 DEVMETHOD(device_detach, octm_detach),
101 DEVMETHOD(device_shutdown, octm_shutdown),
102
103 { 0, 0 }
104 };
105
106 static driver_t octm_driver = {
107 "octm",
108 octm_methods,
109 sizeof (struct octm_softc),
110 };
111
112 static devclass_t octm_devclass;
113
114 DRIVER_MODULE(octm, ciu, octm_driver, octm_devclass, 0, 0);
115
116 static void
117 octm_identify(driver_t *drv, device_t parent)
118 {
119 unsigned i;
120
121 if (!octeon_has_feature(OCTEON_FEATURE_MGMT_PORT))
122 return;
123
124 for (i = 0; i < CVMX_MGMT_PORT_NUM_PORTS; i++)
125 BUS_ADD_CHILD(parent, 0, "octm", i);
126 }
127
128 static int
129 octm_probe(device_t dev)
130 {
131 cvmx_mgmt_port_result_t result;
132
133 result = cvmx_mgmt_port_initialize(device_get_unit(dev));
134 switch (result) {
135 case CVMX_MGMT_PORT_SUCCESS:
136 break;
137 case CVMX_MGMT_PORT_NO_MEMORY:
138 return (ENOBUFS);
139 case CVMX_MGMT_PORT_INVALID_PARAM:
140 return (ENXIO);
141 case CVMX_MGMT_PORT_INIT_ERROR:
142 return (EIO);
143 }
144
145 device_set_desc(dev, "Cavium Octeon Management Ethernet");
146
147 return (0);
148 }
149
150 static int
151 octm_attach(device_t dev)
152 {
153 struct ifnet *ifp;
154 struct octm_softc *sc;
155 cvmx_mixx_irhwm_t mixx_irhwm;
156 cvmx_mixx_intena_t mixx_intena;
157 uint64_t mac;
158 int error;
159 int irq;
160 int rid;
161
162 sc = device_get_softc(dev);
163 sc->sc_dev = dev;
164 sc->sc_port = device_get_unit(dev);
165
166 switch (sc->sc_port) {
167 case 0:
168 irq = CVMX_IRQ_MII;
169 break;
170 case 1:
171 irq = CVMX_IRQ_MII1;
172 break;
173 default:
174 device_printf(dev, "unsupported management port %u.\n", sc->sc_port);
175 return (ENXIO);
176 }
177
178 /*
179 * Set MAC address for this management port.
180 */
181 mac = 0;
182 memcpy((u_int8_t *)&mac + 2, octeon_bootinfo->mac_addr_base, 6);
183 mac += sc->sc_port;
184 cvmx_mgmt_port_set_mac(sc->sc_port, mac);
185
186 /* No watermark for input ring. */
187 mixx_irhwm.u64 = 0;
188 cvmx_write_csr(CVMX_MIXX_IRHWM(sc->sc_port), mixx_irhwm.u64);
189
190 /* Enable input ring interrupts. */
191 mixx_intena.u64 = 0;
192 mixx_intena.s.ithena = 1;
193 cvmx_write_csr(CVMX_MIXX_INTENA(sc->sc_port), mixx_intena.u64);
194
195 /* Allocate and establish interrupt. */
196 rid = 0;
197 sc->sc_intr = bus_alloc_resource(sc->sc_dev, SYS_RES_IRQ, &rid,
198 irq, irq, 1, RF_ACTIVE);
199 if (sc->sc_intr == NULL) {
200 device_printf(dev, "unable to allocate IRQ.\n");
201 return (ENXIO);
202 }
203
204 error = bus_setup_intr(sc->sc_dev, sc->sc_intr, INTR_TYPE_NET, NULL,
205 octm_rx_intr, sc, &sc->sc_intr_cookie);
206 if (error != 0) {
207 device_printf(dev, "unable to setup interrupt.\n");
208 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
209 return (ENXIO);
210 }
211
212 bus_describe_intr(sc->sc_dev, sc->sc_intr, sc->sc_intr_cookie, "rx");
213
214 /* XXX Possibly should enable TX interrupts. */
215
216 ifp = if_alloc(IFT_ETHER);
217 if (ifp == NULL) {
218 device_printf(dev, "cannot allocate ifnet.\n");
219 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
220 return (ENOMEM);
221 }
222
223 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
224 ifp->if_mtu = ETHERMTU;
225 ifp->if_init = octm_init;
226 ifp->if_softc = sc;
227 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_ALLMULTI;
228 ifp->if_ioctl = octm_ioctl;
229
230 sc->sc_ifp = ifp;
231 sc->sc_flags = ifp->if_flags;
232
233 ifmedia_init(&sc->sc_ifmedia, 0, octm_medchange, octm_medstat);
234
235 ifmedia_add(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
236 ifmedia_set(&sc->sc_ifmedia, IFM_ETHER | IFM_AUTO);
237
238 ether_ifattach(ifp, (const u_int8_t *)&mac + 2);
239
240 ifp->if_transmit = octm_transmit;
241
242 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
243 ifp->if_capabilities = IFCAP_VLAN_MTU;
244 ifp->if_capenable = ifp->if_capabilities;
245
246 IFQ_SET_MAXLEN(&ifp->if_snd, CVMX_MGMT_PORT_NUM_TX_BUFFERS);
247 ifp->if_snd.ifq_drv_maxlen = CVMX_MGMT_PORT_NUM_TX_BUFFERS;
248 IFQ_SET_READY(&ifp->if_snd);
249
250 return (bus_generic_attach(dev));
251 }
252
253 static int
254 octm_detach(device_t dev)
255 {
256 struct octm_softc *sc;
257 cvmx_mgmt_port_result_t result;
258
259 sc = device_get_softc(dev);
260
261 result = cvmx_mgmt_port_initialize(sc->sc_port);
262 switch (result) {
263 case CVMX_MGMT_PORT_SUCCESS:
264 break;
265 case CVMX_MGMT_PORT_NO_MEMORY:
266 return (ENOBUFS);
267 case CVMX_MGMT_PORT_INVALID_PARAM:
268 return (ENXIO);
269 case CVMX_MGMT_PORT_INIT_ERROR:
270 return (EIO);
271 }
272
273 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_intr);
274 /* XXX Incomplete. */
275
276 return (0);
277 }
278
279 static int
280 octm_shutdown(device_t dev)
281 {
282 return (octm_detach(dev));
283 }
284
285 static void
286 octm_init(void *arg)
287 {
288 struct ifnet *ifp;
289 struct octm_softc *sc;
290 cvmx_mgmt_port_netdevice_flags_t flags;
291 uint64_t mac;
292
293 sc = arg;
294 ifp = sc->sc_ifp;
295
296 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
297 cvmx_mgmt_port_disable(sc->sc_port);
298
299 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
300 }
301
302 if (((ifp->if_flags ^ sc->sc_flags) & (IFF_ALLMULTI | IFF_MULTICAST | IFF_PROMISC)) != 0) {
303 flags = 0;
304 if ((ifp->if_flags & IFF_ALLMULTI) != 0)
305 flags |= CVMX_IFF_ALLMULTI;
306 if ((ifp->if_flags & IFF_PROMISC) != 0)
307 flags |= CVMX_IFF_PROMISC;
308 cvmx_mgmt_port_set_multicast_list(sc->sc_port, flags);
309 }
310
311 mac = 0;
312 memcpy((u_int8_t *)&mac + 2, IF_LLADDR(ifp), 6);
313 cvmx_mgmt_port_set_mac(sc->sc_port, mac);
314
315 /* XXX link state? */
316
317 if ((ifp->if_flags & IFF_UP) != 0)
318 cvmx_mgmt_port_enable(sc->sc_port);
319
320 ifp->if_drv_flags |= IFF_DRV_RUNNING;
321 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
322 }
323
324 static int
325 octm_transmit(struct ifnet *ifp, struct mbuf *m)
326 {
327 struct octm_softc *sc;
328 cvmx_mgmt_port_result_t result;
329
330 sc = ifp->if_softc;
331
332 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
333 IFF_DRV_RUNNING) {
334 m_freem(m);
335 return (0);
336 }
337
338 result = cvmx_mgmt_port_sendm(sc->sc_port, m);
339
340 if (result == CVMX_MGMT_PORT_SUCCESS) {
341 ETHER_BPF_MTAP(ifp, m);
342
343 ifp->if_opackets++;
344 ifp->if_obytes += m->m_pkthdr.len;
345 } else
346 ifp->if_oerrors++;
347
348 m_freem(m);
349
350 switch (result) {
351 case CVMX_MGMT_PORT_SUCCESS:
352 return (0);
353 case CVMX_MGMT_PORT_NO_MEMORY:
354 return (ENOBUFS);
355 case CVMX_MGMT_PORT_INVALID_PARAM:
356 return (ENXIO);
357 case CVMX_MGMT_PORT_INIT_ERROR:
358 return (EIO);
359 default:
360 return (EDOOFUS);
361 }
362 }
363
364 static int
365 octm_medchange(struct ifnet *ifp)
366 {
367 return (ENOTSUP);
368 }
369
370 static void
371 octm_medstat(struct ifnet *ifp, struct ifmediareq *ifm)
372 {
373 struct octm_softc *sc;
374 cvmx_helper_link_info_t link_info;
375
376 sc = ifp->if_softc;
377
378 ifm->ifm_status = IFM_AVALID;
379 ifm->ifm_active = IFT_ETHER;
380
381 link_info = cvmx_mgmt_port_link_get(sc->sc_port);
382 if (!link_info.s.link_up)
383 return;
384
385 ifm->ifm_status |= IFM_ACTIVE;
386
387 switch (link_info.s.speed) {
388 case 10:
389 ifm->ifm_active |= IFM_10_T;
390 break;
391 case 100:
392 ifm->ifm_active |= IFM_100_TX;
393 break;
394 case 1000:
395 ifm->ifm_active |= IFM_1000_T;
396 break;
397 case 10000:
398 ifm->ifm_active |= IFM_10G_T;
399 break;
400 }
401
402 if (link_info.s.full_duplex)
403 ifm->ifm_active |= IFM_FDX;
404 else
405 ifm->ifm_active |= IFM_HDX;
406 }
407
408 static int
409 octm_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
410 {
411 struct octm_softc *sc;
412 struct ifreq *ifr;
413 #ifdef INET
414 struct ifaddr *ifa;
415 #endif
416 int error;
417
418 sc = ifp->if_softc;
419 ifr = (struct ifreq *)data;
420 #ifdef INET
421 ifa = (struct ifaddr *)data;
422 #endif
423
424 switch (cmd) {
425 case SIOCSIFADDR:
426 #ifdef INET
427 /*
428 * Avoid reinitialization unless it's necessary.
429 */
430 if (ifa->ifa_addr->sa_family == AF_INET) {
431 ifp->if_flags |= IFF_UP;
432 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
433 octm_init(sc);
434 arp_ifinit(ifp, ifa);
435
436 return (0);
437 }
438 #endif
439 error = ether_ioctl(ifp, cmd, data);
440 if (error != 0)
441 return (error);
442 return (0);
443
444 case SIOCSIFFLAGS:
445 if (ifp->if_flags == sc->sc_flags)
446 return (0);
447 if ((ifp->if_flags & IFF_UP) != 0) {
448 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
449 octm_init(sc);
450 } else {
451 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
452 cvmx_mgmt_port_disable(sc->sc_port);
453
454 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
455 }
456 }
457 sc->sc_flags = ifp->if_flags;
458 return (0);
459
460 case SIOCSIFCAP:
461 /*
462 * Just change the capabilities in software, currently none
463 * require reprogramming hardware, they just toggle whether we
464 * make use of already-present facilities in software.
465 */
466 ifp->if_capenable = ifr->ifr_reqcap;
467 return (0);
468
469 case SIOCSIFMTU:
470 cvmx_mgmt_port_set_max_packet_size(sc->sc_port, ifr->ifr_mtu + ifp->if_data.ifi_hdrlen);
471 return (0);
472
473 case SIOCSIFMEDIA:
474 case SIOCGIFMEDIA:
475 error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
476 if (error != 0)
477 return (error);
478 return (0);
479
480 default:
481 error = ether_ioctl(ifp, cmd, data);
482 if (error != 0)
483 return (error);
484 return (0);
485 }
486 }
487
488 static void
489 octm_rx_intr(void *arg)
490 {
491 struct octm_softc *sc = arg;
492 cvmx_mixx_isr_t mixx_isr;
493 int len;
494
495 mixx_isr.u64 = cvmx_read_csr(CVMX_MIXX_ISR(sc->sc_port));
496 if (!mixx_isr.s.irthresh) {
497 device_printf(sc->sc_dev, "stray interrupt.\n");
498 return;
499 }
500
501 for (;;) {
502 struct mbuf *m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
503 if (m == NULL) {
504 device_printf(sc->sc_dev, "no memory for receive mbuf.\n");
505 return;
506 }
507
508
509 len = cvmx_mgmt_port_receive(sc->sc_port, MCLBYTES, m->m_data);
510 if (len > 0) {
511 m->m_pkthdr.rcvif = sc->sc_ifp;
512 m->m_pkthdr.len = m->m_len = len;
513
514 sc->sc_ifp->if_ipackets++;
515
516 (*sc->sc_ifp->if_input)(sc->sc_ifp, m);
517
518 continue;
519 }
520
521 m_freem(m);
522
523 if (len == 0)
524 break;
525
526 sc->sc_ifp->if_ierrors++;
527 }
528
529 /* Acknowledge interrupts. */
530 cvmx_write_csr(CVMX_MIXX_ISR(sc->sc_port), mixx_isr.u64);
531 cvmx_read_csr(CVMX_MIXX_ISR(sc->sc_port));
532 }
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