FreeBSD/Linux Kernel Cross Reference
sys/dev/netif/re/if_re.c
1 /*
2 * Copyright (c) 2004
3 * Joerg Sonnenberger <joerg@bec.de>. All rights reserved.
4 *
5 * Copyright (c) 1997, 1998-2003
6 * Bill Paul <wpaul@windriver.com>. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Bill Paul.
19 * 4. Neither the name of the author nor the names of any co-contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
33 * THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * $FreeBSD: src/sys/dev/re/if_re.c,v 1.25 2004/06/09 14:34:01 naddy Exp $
36 */
37
38 /*
39 * RealTek 8139C+/8169/8169S/8110S/8168/8111/8101E PCI NIC driver
40 *
41 * Written by Bill Paul <wpaul@windriver.com>
42 * Senior Networking Software Engineer
43 * Wind River Systems
44 */
45
46 /*
47 * This driver is designed to support RealTek's next generation of
48 * 10/100 and 10/100/1000 PCI ethernet controllers. There are currently
49 * seven devices in this family: the RTL8139C+, the RTL8169, the RTL8169S,
50 * RTL8110S, the RTL8168, the RTL8111 and the RTL8101E.
51 *
52 * The 8139C+ is a 10/100 ethernet chip. It is backwards compatible
53 * with the older 8139 family, however it also supports a special
54 * C+ mode of operation that provides several new performance enhancing
55 * features. These include:
56 *
57 * o Descriptor based DMA mechanism. Each descriptor represents
58 * a single packet fragment. Data buffers may be aligned on
59 * any byte boundary.
60 *
61 * o 64-bit DMA
62 *
63 * o TCP/IP checksum offload for both RX and TX
64 *
65 * o High and normal priority transmit DMA rings
66 *
67 * o VLAN tag insertion and extraction
68 *
69 * o TCP large send (segmentation offload)
70 *
71 * Like the 8139, the 8139C+ also has a built-in 10/100 PHY. The C+
72 * programming API is fairly straightforward. The RX filtering, EEPROM
73 * access and PHY access is the same as it is on the older 8139 series
74 * chips.
75 *
76 * The 8169 is a 64-bit 10/100/1000 gigabit ethernet MAC. It has almost the
77 * same programming API and feature set as the 8139C+ with the following
78 * differences and additions:
79 *
80 * o 1000Mbps mode
81 *
82 * o Jumbo frames
83 *
84 * o GMII and TBI ports/registers for interfacing with copper
85 * or fiber PHYs
86 *
87 * o RX and TX DMA rings can have up to 1024 descriptors
88 * (the 8139C+ allows a maximum of 64)
89 *
90 * o Slight differences in register layout from the 8139C+
91 *
92 * The TX start and timer interrupt registers are at different locations
93 * on the 8169 than they are on the 8139C+. Also, the status word in the
94 * RX descriptor has a slightly different bit layout. The 8169 does not
95 * have a built-in PHY. Most reference boards use a Marvell 88E1000 'Alaska'
96 * copper gigE PHY.
97 *
98 * The 8169S/8110S 10/100/1000 devices have built-in copper gigE PHYs
99 * (the 'S' stands for 'single-chip'). These devices have the same
100 * programming API as the older 8169, but also have some vendor-specific
101 * registers for the on-board PHY. The 8110S is a LAN-on-motherboard
102 * part designed to be pin-compatible with the RealTek 8100 10/100 chip.
103 *
104 * This driver takes advantage of the RX and TX checksum offload and
105 * VLAN tag insertion/extraction features. It also implements TX
106 * interrupt moderation using the timer interrupt registers, which
107 * significantly reduces TX interrupt load. There is also support
108 * for jumbo frames, however the 8169/8169S/8110S can not transmit
109 * jumbo frames larger than 7440, so the max MTU possible with this
110 * driver is 7422 bytes.
111 */
112
113 #define _IP_VHL
114
115 #include "opt_ifpoll.h"
116
117 #include <sys/param.h>
118 #include <sys/bus.h>
119 #include <sys/endian.h>
120 #include <sys/kernel.h>
121 #include <sys/in_cksum.h>
122 #include <sys/interrupt.h>
123 #include <sys/malloc.h>
124 #include <sys/mbuf.h>
125 #include <sys/rman.h>
126 #include <sys/serialize.h>
127 #include <sys/socket.h>
128 #include <sys/sockio.h>
129 #include <sys/sysctl.h>
130
131 #include <net/bpf.h>
132 #include <net/ethernet.h>
133 #include <net/if.h>
134 #include <net/ifq_var.h>
135 #include <net/if_arp.h>
136 #include <net/if_dl.h>
137 #include <net/if_media.h>
138 #include <net/if_poll.h>
139 #include <net/if_types.h>
140 #include <net/vlan/if_vlan_var.h>
141 #include <net/vlan/if_vlan_ether.h>
142
143 #include <netinet/ip.h>
144
145 #include <dev/netif/mii_layer/mii.h>
146 #include <dev/netif/mii_layer/miivar.h>
147
148 #include "pcidevs.h"
149 #include <bus/pci/pcireg.h>
150 #include <bus/pci/pcivar.h>
151
152 /* "device miibus" required. See GENERIC if you get errors here. */
153 #include "miibus_if.h"
154
155 #include <dev/netif/re/if_rereg.h>
156 #include <dev/netif/re/if_revar.h>
157
158 /*
159 * Various supported device vendors/types and their names.
160 */
161 static const struct re_type {
162 uint16_t re_vid;
163 uint16_t re_did;
164 const char *re_name;
165 } re_devs[] = {
166 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DGE528T,
167 "D-Link DGE-528(T) Gigabit Ethernet Adapter" },
168
169 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
170 "RealTek 8139C+ 10/100BaseTX" },
171
172 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8101E,
173 "RealTek 810x PCIe 10/100baseTX" },
174
175 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8168,
176 "RealTek 8111/8168 PCIe Gigabit Ethernet" },
177
178 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169,
179 "RealTek 8110/8169 Gigabit Ethernet" },
180
181 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169SC,
182 "RealTek 8169SC/8110SC Single-chip Gigabit Ethernet" },
183
184 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_CG_LAPCIGT,
185 "Corega CG-LAPCIGT Gigabit Ethernet" },
186
187 { PCI_VENDOR_LINKSYS, PCI_PRODUCT_LINKSYS_EG1032,
188 "Linksys EG1032 Gigabit Ethernet" },
189
190 { PCI_VENDOR_USR2, PCI_PRODUCT_USR2_997902,
191 "US Robotics 997902 Gigabit Ethernet" },
192
193 { PCI_VENDOR_TTTECH, PCI_PRODUCT_TTTECH_MC322,
194 "TTTech MC322 Gigabit Ethernet" },
195
196 { 0, 0, NULL }
197 };
198
199 static const struct re_hwrev re_hwrevs[] = {
200 { RE_HWREV_8139CPLUS, ETHERMTU,
201 RE_C_HWCSUM | RE_C_8139CP | RE_C_FASTE },
202
203 { RE_HWREV_8169, ETHERMTU,
204 RE_C_HWCSUM | RE_C_8169 },
205
206 { RE_HWREV_8110S, RE_MTU_6K,
207 RE_C_HWCSUM | RE_C_8169 },
208
209 { RE_HWREV_8169S, RE_MTU_6K,
210 RE_C_HWCSUM | RE_C_8169 },
211
212 { RE_HWREV_8169SB, RE_MTU_6K,
213 RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_8169 },
214
215 { RE_HWREV_8169SC, RE_MTU_6K,
216 RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_8169 },
217
218 { RE_HWREV_8168B1, RE_MTU_6K,
219 RE_C_HWIM | RE_C_HWCSUM | RE_C_PHYPMGT },
220
221 { RE_HWREV_8168B2, RE_MTU_6K,
222 RE_C_HWIM | RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_AUTOPAD },
223
224 { RE_HWREV_8168C, RE_MTU_6K,
225 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
226 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
227
228 { RE_HWREV_8168CP, RE_MTU_6K,
229 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
230 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
231
232 { RE_HWREV_8168D, RE_MTU_9K,
233 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
234 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
235
236 { RE_HWREV_8168DP, RE_MTU_9K,
237 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
238 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
239
240 { RE_HWREV_8168E, RE_MTU_9K,
241 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
242 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
243
244 { RE_HWREV_8168F, RE_MTU_9K,
245 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
246 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
247
248 { RE_HWREV_8111F, RE_MTU_9K,
249 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
250 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
251
252 { RE_HWREV_8411, ETHERMTU,
253 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
254 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
255
256 { RE_HWREV_8168G, ETHERMTU,
257 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
258 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
259
260 { RE_HWREV_8168EP, ETHERMTU,
261 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
262 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
263
264 { RE_HWREV_8168GU, ETHERMTU,
265 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
266 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
267
268 { RE_HWREV_8411B, ETHERMTU,
269 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
270 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
271
272 { RE_HWREV_8100E, ETHERMTU,
273 RE_C_HWCSUM | RE_C_FASTE },
274
275 { RE_HWREV_8101E, ETHERMTU,
276 RE_C_HWCSUM | RE_C_FASTE },
277
278 { RE_HWREV_8102E, ETHERMTU,
279 RE_C_HWCSUM | RE_C_MAC2 | RE_C_AUTOPAD | RE_C_STOP_RXTX |
280 RE_C_FASTE },
281
282 { RE_HWREV_8102EL, ETHERMTU,
283 RE_C_HWCSUM | RE_C_MAC2 | RE_C_AUTOPAD | RE_C_STOP_RXTX |
284 RE_C_FASTE },
285
286 { RE_HWREV_8105E, ETHERMTU,
287 RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT | RE_C_AUTOPAD |
288 RE_C_STOP_RXTX | RE_C_FASTE },
289
290 { RE_HWREV_8401E, ETHERMTU,
291 RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT | RE_C_AUTOPAD |
292 RE_C_STOP_RXTX | RE_C_FASTE },
293
294 { RE_HWREV_8402, ETHERMTU,
295 RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT | RE_C_AUTOPAD |
296 RE_C_STOP_RXTX | RE_C_FASTE },
297
298 { RE_HWREV_8106E, ETHERMTU,
299 RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT | RE_C_AUTOPAD |
300 RE_C_STOP_RXTX | RE_C_FASTE },
301
302 { RE_HWREV_NULL, 0, 0 }
303 };
304
305 static int re_probe(device_t);
306 static int re_attach(device_t);
307 static int re_detach(device_t);
308 static int re_suspend(device_t);
309 static int re_resume(device_t);
310 static void re_shutdown(device_t);
311
312 static int re_allocmem(device_t);
313 static void re_freemem(device_t);
314 static void re_freebufmem(struct re_softc *, int, int);
315 static int re_encap(struct re_softc *, struct mbuf **, int *);
316 static int re_newbuf_std(struct re_softc *, int, int);
317 static int re_newbuf_jumbo(struct re_softc *, int, int);
318 static void re_setup_rxdesc(struct re_softc *, int);
319 static int re_rx_list_init(struct re_softc *);
320 static int re_tx_list_init(struct re_softc *);
321 static int re_rxeof(struct re_softc *);
322 static int re_txeof(struct re_softc *);
323 static int re_tx_collect(struct re_softc *);
324 static void re_intr(void *);
325 static void re_tick(void *);
326 static void re_tick_serialized(void *);
327
328 static void re_start(struct ifnet *, struct ifaltq_subque *);
329 static int re_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
330 static void re_init(void *);
331 static void re_stop(struct re_softc *);
332 static void re_watchdog(struct ifnet *);
333 static int re_ifmedia_upd(struct ifnet *);
334 static void re_ifmedia_sts(struct ifnet *, struct ifmediareq *);
335
336 static void re_eeprom_putbyte(struct re_softc *, int);
337 static void re_eeprom_getword(struct re_softc *, int, u_int16_t *);
338 static void re_read_eeprom(struct re_softc *, caddr_t, int, int);
339 static void re_get_eewidth(struct re_softc *);
340
341 static int re_gmii_readreg(device_t, int, int);
342 static int re_gmii_writereg(device_t, int, int, int);
343
344 static int re_miibus_readreg(device_t, int, int);
345 static int re_miibus_writereg(device_t, int, int, int);
346 static void re_miibus_statchg(device_t);
347
348 static void re_setmulti(struct re_softc *);
349 static void re_reset(struct re_softc *, int);
350 static void re_get_eaddr(struct re_softc *, uint8_t *);
351
352 static void re_setup_hw_im(struct re_softc *);
353 static void re_setup_sim_im(struct re_softc *);
354 static void re_disable_hw_im(struct re_softc *);
355 static void re_disable_sim_im(struct re_softc *);
356 static void re_config_imtype(struct re_softc *, int);
357 static void re_setup_intr(struct re_softc *, int, int);
358
359 static int re_sysctl_hwtime(SYSCTL_HANDLER_ARGS, int *);
360 static int re_sysctl_rxtime(SYSCTL_HANDLER_ARGS);
361 static int re_sysctl_txtime(SYSCTL_HANDLER_ARGS);
362 static int re_sysctl_simtime(SYSCTL_HANDLER_ARGS);
363 static int re_sysctl_imtype(SYSCTL_HANDLER_ARGS);
364
365 static int re_jpool_alloc(struct re_softc *);
366 static void re_jpool_free(struct re_softc *);
367 static struct re_jbuf *re_jbuf_alloc(struct re_softc *);
368 static void re_jbuf_free(void *);
369 static void re_jbuf_ref(void *);
370
371 #ifdef RE_DIAG
372 static int re_diag(struct re_softc *);
373 #endif
374
375 #ifdef IFPOLL_ENABLE
376 static void re_npoll(struct ifnet *, struct ifpoll_info *);
377 static void re_npoll_compat(struct ifnet *, void *, int);
378 #endif
379
380 static device_method_t re_methods[] = {
381 /* Device interface */
382 DEVMETHOD(device_probe, re_probe),
383 DEVMETHOD(device_attach, re_attach),
384 DEVMETHOD(device_detach, re_detach),
385 DEVMETHOD(device_suspend, re_suspend),
386 DEVMETHOD(device_resume, re_resume),
387 DEVMETHOD(device_shutdown, re_shutdown),
388
389 /* bus interface */
390 DEVMETHOD(bus_print_child, bus_generic_print_child),
391 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
392
393 /* MII interface */
394 DEVMETHOD(miibus_readreg, re_miibus_readreg),
395 DEVMETHOD(miibus_writereg, re_miibus_writereg),
396 DEVMETHOD(miibus_statchg, re_miibus_statchg),
397
398 DEVMETHOD_END
399 };
400
401 static driver_t re_driver = {
402 "re",
403 re_methods,
404 sizeof(struct re_softc)
405 };
406
407 static devclass_t re_devclass;
408
409 DECLARE_DUMMY_MODULE(if_re);
410 MODULE_DEPEND(if_re, miibus, 1, 1, 1);
411 DRIVER_MODULE(if_re, pci, re_driver, re_devclass, NULL, NULL);
412 DRIVER_MODULE(if_re, cardbus, re_driver, re_devclass, NULL, NULL);
413 DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, NULL, NULL);
414
415 static int re_rx_desc_count = RE_RX_DESC_CNT_DEF;
416 static int re_tx_desc_count = RE_TX_DESC_CNT_DEF;
417 static int re_msi_enable = 0;
418
419 TUNABLE_INT("hw.re.rx_desc_count", &re_rx_desc_count);
420 TUNABLE_INT("hw.re.tx_desc_count", &re_tx_desc_count);
421 TUNABLE_INT("hw.re.msi.enable", &re_msi_enable);
422
423 #define EE_SET(x) \
424 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) | (x))
425
426 #define EE_CLR(x) \
427 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) & ~(x))
428
429 static __inline void
430 re_free_rxchain(struct re_softc *sc)
431 {
432 if (sc->re_head != NULL) {
433 m_freem(sc->re_head);
434 sc->re_head = sc->re_tail = NULL;
435 }
436 }
437
438 /*
439 * Send a read command and address to the EEPROM, check for ACK.
440 */
441 static void
442 re_eeprom_putbyte(struct re_softc *sc, int addr)
443 {
444 int d, i;
445
446 d = addr | (RE_9346_READ << sc->re_eewidth);
447
448 /*
449 * Feed in each bit and strobe the clock.
450 */
451 for (i = 1 << (sc->re_eewidth + 3); i; i >>= 1) {
452 if (d & i)
453 EE_SET(RE_EE_DATAIN);
454 else
455 EE_CLR(RE_EE_DATAIN);
456 DELAY(100);
457 EE_SET(RE_EE_CLK);
458 DELAY(150);
459 EE_CLR(RE_EE_CLK);
460 DELAY(100);
461 }
462 }
463
464 /*
465 * Read a word of data stored in the EEPROM at address 'addr.'
466 */
467 static void
468 re_eeprom_getword(struct re_softc *sc, int addr, uint16_t *dest)
469 {
470 int i;
471 uint16_t word = 0;
472
473 /*
474 * Send address of word we want to read.
475 */
476 re_eeprom_putbyte(sc, addr);
477
478 /*
479 * Start reading bits from EEPROM.
480 */
481 for (i = 0x8000; i != 0; i >>= 1) {
482 EE_SET(RE_EE_CLK);
483 DELAY(100);
484 if (CSR_READ_1(sc, RE_EECMD) & RE_EE_DATAOUT)
485 word |= i;
486 EE_CLR(RE_EE_CLK);
487 DELAY(100);
488 }
489
490 *dest = word;
491 }
492
493 /*
494 * Read a sequence of words from the EEPROM.
495 */
496 static void
497 re_read_eeprom(struct re_softc *sc, caddr_t dest, int off, int cnt)
498 {
499 int i;
500 uint16_t word = 0, *ptr;
501
502 CSR_SETBIT_1(sc, RE_EECMD, RE_EEMODE_PROGRAM);
503 DELAY(100);
504
505 for (i = 0; i < cnt; i++) {
506 CSR_SETBIT_1(sc, RE_EECMD, RE_EE_SEL);
507 re_eeprom_getword(sc, off + i, &word);
508 CSR_CLRBIT_1(sc, RE_EECMD, RE_EE_SEL);
509 ptr = (uint16_t *)(dest + (i * 2));
510 *ptr = word;
511 }
512
513 CSR_CLRBIT_1(sc, RE_EECMD, RE_EEMODE_PROGRAM);
514 }
515
516 static void
517 re_get_eewidth(struct re_softc *sc)
518 {
519 uint16_t re_did = 0;
520
521 sc->re_eewidth = 6;
522 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1);
523 if (re_did != 0x8129)
524 sc->re_eewidth = 8;
525 }
526
527 static int
528 re_gmii_readreg(device_t dev, int phy, int reg)
529 {
530 struct re_softc *sc = device_get_softc(dev);
531 u_int32_t rval;
532 int i;
533
534 if (phy != 1)
535 return(0);
536
537 /* Let the rgephy driver read the GMEDIASTAT register */
538
539 if (reg == RE_GMEDIASTAT)
540 return(CSR_READ_1(sc, RE_GMEDIASTAT));
541
542 CSR_WRITE_4(sc, RE_PHYAR, reg << 16);
543 DELAY(1000);
544
545 for (i = 0; i < RE_TIMEOUT; i++) {
546 rval = CSR_READ_4(sc, RE_PHYAR);
547 if (rval & RE_PHYAR_BUSY)
548 break;
549 DELAY(100);
550 }
551
552 if (i == RE_TIMEOUT) {
553 device_printf(dev, "PHY read failed\n");
554 return(0);
555 }
556
557 return(rval & RE_PHYAR_PHYDATA);
558 }
559
560 static int
561 re_gmii_writereg(device_t dev, int phy, int reg, int data)
562 {
563 struct re_softc *sc = device_get_softc(dev);
564 uint32_t rval;
565 int i;
566
567 CSR_WRITE_4(sc, RE_PHYAR,
568 (reg << 16) | (data & RE_PHYAR_PHYDATA) | RE_PHYAR_BUSY);
569 DELAY(1000);
570
571 for (i = 0; i < RE_TIMEOUT; i++) {
572 rval = CSR_READ_4(sc, RE_PHYAR);
573 if ((rval & RE_PHYAR_BUSY) == 0)
574 break;
575 DELAY(100);
576 }
577
578 if (i == RE_TIMEOUT)
579 device_printf(dev, "PHY write failed\n");
580
581 return(0);
582 }
583
584 static int
585 re_miibus_readreg(device_t dev, int phy, int reg)
586 {
587 struct re_softc *sc = device_get_softc(dev);
588 uint16_t rval = 0;
589 uint16_t re8139_reg = 0;
590
591 if (!RE_IS_8139CP(sc)) {
592 rval = re_gmii_readreg(dev, phy, reg);
593 return(rval);
594 }
595
596 /* Pretend the internal PHY is only at address 0 */
597 if (phy)
598 return(0);
599
600 switch(reg) {
601 case MII_BMCR:
602 re8139_reg = RE_BMCR;
603 break;
604 case MII_BMSR:
605 re8139_reg = RE_BMSR;
606 break;
607 case MII_ANAR:
608 re8139_reg = RE_ANAR;
609 break;
610 case MII_ANER:
611 re8139_reg = RE_ANER;
612 break;
613 case MII_ANLPAR:
614 re8139_reg = RE_LPAR;
615 break;
616 case MII_PHYIDR1:
617 case MII_PHYIDR2:
618 return(0);
619 /*
620 * Allow the rlphy driver to read the media status
621 * register. If we have a link partner which does not
622 * support NWAY, this is the register which will tell
623 * us the results of parallel detection.
624 */
625 case RE_MEDIASTAT:
626 return(CSR_READ_1(sc, RE_MEDIASTAT));
627 default:
628 device_printf(dev, "bad phy register\n");
629 return(0);
630 }
631 rval = CSR_READ_2(sc, re8139_reg);
632 if (re8139_reg == RE_BMCR) {
633 /* 8139C+ has different bit layout. */
634 rval &= ~(BMCR_LOOP | BMCR_ISO);
635 }
636 return(rval);
637 }
638
639 static int
640 re_miibus_writereg(device_t dev, int phy, int reg, int data)
641 {
642 struct re_softc *sc= device_get_softc(dev);
643 u_int16_t re8139_reg = 0;
644
645 if (!RE_IS_8139CP(sc))
646 return(re_gmii_writereg(dev, phy, reg, data));
647
648 /* Pretend the internal PHY is only at address 0 */
649 if (phy)
650 return(0);
651
652 switch(reg) {
653 case MII_BMCR:
654 re8139_reg = RE_BMCR;
655 /* 8139C+ has different bit layout. */
656 data &= ~(BMCR_LOOP | BMCR_ISO);
657 break;
658 case MII_BMSR:
659 re8139_reg = RE_BMSR;
660 break;
661 case MII_ANAR:
662 re8139_reg = RE_ANAR;
663 break;
664 case MII_ANER:
665 re8139_reg = RE_ANER;
666 break;
667 case MII_ANLPAR:
668 re8139_reg = RE_LPAR;
669 break;
670 case MII_PHYIDR1:
671 case MII_PHYIDR2:
672 return(0);
673 default:
674 device_printf(dev, "bad phy register\n");
675 return(0);
676 }
677 CSR_WRITE_2(sc, re8139_reg, data);
678 return(0);
679 }
680
681 static void
682 re_miibus_statchg(device_t dev)
683 {
684 }
685
686 /*
687 * Program the 64-bit multicast hash filter.
688 */
689 static void
690 re_setmulti(struct re_softc *sc)
691 {
692 struct ifnet *ifp = &sc->arpcom.ac_if;
693 int h = 0;
694 uint32_t hashes[2] = { 0, 0 };
695 struct ifmultiaddr *ifma;
696 uint32_t rxfilt;
697 int mcnt = 0;
698
699 rxfilt = CSR_READ_4(sc, RE_RXCFG);
700
701 /* Set the individual bit to receive frames for this host only. */
702 rxfilt |= RE_RXCFG_RX_INDIV;
703 /* Set capture broadcast bit to capture broadcast frames. */
704 rxfilt |= RE_RXCFG_RX_BROAD;
705
706 rxfilt &= ~(RE_RXCFG_RX_ALLPHYS | RE_RXCFG_RX_MULTI);
707 if ((ifp->if_flags & IFF_ALLMULTI) || (ifp->if_flags & IFF_PROMISC)) {
708 rxfilt |= RE_RXCFG_RX_MULTI;
709
710 /* If we want promiscuous mode, set the allframes bit. */
711 if (ifp->if_flags & IFF_PROMISC)
712 rxfilt |= RE_RXCFG_RX_ALLPHYS;
713
714 CSR_WRITE_4(sc, RE_RXCFG, rxfilt);
715 CSR_WRITE_4(sc, RE_MAR0, 0xFFFFFFFF);
716 CSR_WRITE_4(sc, RE_MAR4, 0xFFFFFFFF);
717 return;
718 }
719
720 /* first, zot all the existing hash bits */
721 CSR_WRITE_4(sc, RE_MAR0, 0);
722 CSR_WRITE_4(sc, RE_MAR4, 0);
723
724 /* now program new ones */
725 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
726 if (ifma->ifma_addr->sa_family != AF_LINK)
727 continue;
728 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
729 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
730 if (h < 32)
731 hashes[0] |= (1 << h);
732 else
733 hashes[1] |= (1 << (h - 32));
734 mcnt++;
735 }
736
737 if (mcnt)
738 rxfilt |= RE_RXCFG_RX_MULTI;
739 else
740 rxfilt &= ~RE_RXCFG_RX_MULTI;
741
742 CSR_WRITE_4(sc, RE_RXCFG, rxfilt);
743
744 /*
745 * For some unfathomable reason, RealTek decided to reverse
746 * the order of the multicast hash registers in the PCI Express
747 * parts. This means we have to write the hash pattern in reverse
748 * order for those devices.
749 */
750 if (sc->re_caps & RE_C_PCIE) {
751 CSR_WRITE_4(sc, RE_MAR0, bswap32(hashes[1]));
752 CSR_WRITE_4(sc, RE_MAR4, bswap32(hashes[0]));
753 } else {
754 CSR_WRITE_4(sc, RE_MAR0, hashes[0]);
755 CSR_WRITE_4(sc, RE_MAR4, hashes[1]);
756 }
757 }
758
759 static void
760 re_reset(struct re_softc *sc, int running)
761 {
762 int i;
763
764 if ((sc->re_caps & RE_C_STOP_RXTX) && running) {
765 CSR_WRITE_1(sc, RE_COMMAND,
766 RE_CMD_STOPREQ | RE_CMD_TX_ENB | RE_CMD_RX_ENB);
767 DELAY(100);
768 }
769
770 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_RESET);
771
772 for (i = 0; i < RE_TIMEOUT; i++) {
773 DELAY(10);
774 if ((CSR_READ_1(sc, RE_COMMAND) & RE_CMD_RESET) == 0)
775 break;
776 }
777 if (i == RE_TIMEOUT)
778 if_printf(&sc->arpcom.ac_if, "reset never completed!\n");
779 }
780
781 #ifdef RE_DIAG
782 /*
783 * The following routine is designed to test for a defect on some
784 * 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64#
785 * lines connected to the bus, however for a 32-bit only card, they
786 * should be pulled high. The result of this defect is that the
787 * NIC will not work right if you plug it into a 64-bit slot: DMA
788 * operations will be done with 64-bit transfers, which will fail
789 * because the 64-bit data lines aren't connected.
790 *
791 * There's no way to work around this (short of talking a soldering
792 * iron to the board), however we can detect it. The method we use
793 * here is to put the NIC into digital loopback mode, set the receiver
794 * to promiscuous mode, and then try to send a frame. We then compare
795 * the frame data we sent to what was received. If the data matches,
796 * then the NIC is working correctly, otherwise we know the user has
797 * a defective NIC which has been mistakenly plugged into a 64-bit PCI
798 * slot. In the latter case, there's no way the NIC can work correctly,
799 * so we print out a message on the console and abort the device attach.
800 */
801
802 static int
803 re_diag(struct re_softc *sc)
804 {
805 struct ifnet *ifp = &sc->arpcom.ac_if;
806 struct mbuf *m0;
807 struct ether_header *eh;
808 struct re_desc *cur_rx;
809 uint16_t status;
810 int total_len, i, error = 0, phyaddr;
811 uint8_t dst[ETHER_ADDR_LEN] = { 0x00, 'h', 'e', 'l', 'l', 'o' };
812 uint8_t src[ETHER_ADDR_LEN] = { 0x00, 'w', 'o', 'r', 'l', 'd' };
813 char ethstr[2][ETHER_ADDRSTRLEN + 1];
814
815 /* Allocate a single mbuf */
816
817 MGETHDR(m0, MB_DONTWAIT, MT_DATA);
818 if (m0 == NULL)
819 return(ENOBUFS);
820
821 /*
822 * Initialize the NIC in test mode. This sets the chip up
823 * so that it can send and receive frames, but performs the
824 * following special functions:
825 * - Puts receiver in promiscuous mode
826 * - Enables digital loopback mode
827 * - Leaves interrupts turned off
828 */
829
830 ifp->if_flags |= IFF_PROMISC;
831 sc->re_flags |= RE_F_TESTMODE;
832 re_init(sc);
833 sc->re_flags |= RE_F_LINKED;
834 if (!RE_IS_8139CP(sc))
835 phyaddr = 1;
836 else
837 phyaddr = 0;
838
839 re_miibus_writereg(sc->re_dev, phyaddr, MII_BMCR, BMCR_RESET);
840 for (i = 0; i < RE_TIMEOUT; i++) {
841 status = re_miibus_readreg(sc->re_dev, phyaddr, MII_BMCR);
842 if (!(status & BMCR_RESET))
843 break;
844 }
845
846 re_miibus_writereg(sc->re_dev, phyaddr, MII_BMCR, BMCR_LOOP);
847 CSR_WRITE_2(sc, RE_ISR, RE_INTRS_DIAG);
848
849 DELAY(100000);
850
851 /* Put some data in the mbuf */
852
853 eh = mtod(m0, struct ether_header *);
854 bcopy (dst, eh->ether_dhost, ETHER_ADDR_LEN);
855 bcopy (src, eh->ether_shost, ETHER_ADDR_LEN);
856 eh->ether_type = htons(ETHERTYPE_IP);
857 m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN;
858
859 /*
860 * Queue the packet, start transmission.
861 * Note: ifq_handoff() ultimately calls re_start() for us.
862 */
863
864 CSR_WRITE_2(sc, RE_ISR, 0xFFFF);
865 error = ifq_handoff(ifp, m0, NULL);
866 if (error) {
867 m0 = NULL;
868 goto done;
869 }
870 m0 = NULL;
871
872 /* Wait for it to propagate through the chip */
873
874 DELAY(100000);
875 for (i = 0; i < RE_TIMEOUT; i++) {
876 status = CSR_READ_2(sc, RE_ISR);
877 CSR_WRITE_2(sc, RE_ISR, status);
878 if ((status & (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK)) ==
879 (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK))
880 break;
881 DELAY(10);
882 }
883
884 if (i == RE_TIMEOUT) {
885 if_printf(ifp, "diagnostic failed to receive packet "
886 "in loopback mode\n");
887 error = EIO;
888 goto done;
889 }
890
891 /*
892 * The packet should have been dumped into the first
893 * entry in the RX DMA ring. Grab it from there.
894 */
895
896 bus_dmamap_sync(sc->re_ldata.re_rx_mtag, sc->re_ldata.re_rx_dmamap[0],
897 BUS_DMASYNC_POSTREAD);
898 bus_dmamap_unload(sc->re_ldata.re_rx_mtag,
899 sc->re_ldata.re_rx_dmamap[0]);
900
901 m0 = sc->re_ldata.re_rx_mbuf[0];
902 sc->re_ldata.re_rx_mbuf[0] = NULL;
903 eh = mtod(m0, struct ether_header *);
904
905 cur_rx = &sc->re_ldata.re_rx_list[0];
906 total_len = RE_RXBYTES(cur_rx);
907
908 if (total_len != ETHER_MIN_LEN) {
909 if_printf(ifp, "diagnostic failed, received short packet\n");
910 error = EIO;
911 goto done;
912 }
913
914 /* Test that the received packet data matches what we sent. */
915
916 if (bcmp(eh->ether_dhost, dst, ETHER_ADDR_LEN) ||
917 bcmp(eh->ether_shost, &src, ETHER_ADDR_LEN) ||
918 be16toh(eh->ether_type) != ETHERTYPE_IP) {
919 if_printf(ifp, "WARNING, DMA FAILURE!\n");
920 if_printf(ifp, "expected TX data: %s/%s/0x%x\n",
921 kether_ntoa(dst, ethstr[0]), kether_ntoa(src, ethstr[1]), ETHERTYPE_IP);
922 if_printf(ifp, "received RX data: %s/%s/0x%x\n",
923 kether_ntoa(eh->ether_dhost, ethstr[0]),
924 kether_ntoa(eh->ether_shost, ethstr[1]),
925 ntohs(eh->ether_type));
926 if_printf(ifp, "You may have a defective 32-bit NIC plugged "
927 "into a 64-bit PCI slot.\n");
928 if_printf(ifp, "Please re-install the NIC in a 32-bit slot "
929 "for proper operation.\n");
930 if_printf(ifp, "Read the re(4) man page for more details.\n");
931 error = EIO;
932 }
933
934 done:
935 /* Turn interface off, release resources */
936
937 sc->re_flags &= ~(RE_F_LINKED | RE_F_TESTMODE);
938 ifp->if_flags &= ~IFF_PROMISC;
939 re_stop(sc);
940 if (m0 != NULL)
941 m_freem(m0);
942
943 return (error);
944 }
945 #endif /* RE_DIAG */
946
947 /*
948 * Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device
949 * IDs against our list and return a device name if we find a match.
950 */
951 static int
952 re_probe(device_t dev)
953 {
954 const struct re_type *t;
955 const struct re_hwrev *hw_rev;
956 struct re_softc *sc;
957 int rid;
958 uint32_t hwrev, macmode, txcfg;
959 uint16_t vendor, product;
960
961 vendor = pci_get_vendor(dev);
962 product = pci_get_device(dev);
963
964 /*
965 * Only attach to rev.3 of the Linksys EG1032 adapter.
966 * Rev.2 is supported by sk(4).
967 */
968 if (vendor == PCI_VENDOR_LINKSYS &&
969 product == PCI_PRODUCT_LINKSYS_EG1032 &&
970 pci_get_subdevice(dev) != PCI_SUBDEVICE_LINKSYS_EG1032_REV3)
971 return ENXIO;
972
973 if (vendor == PCI_VENDOR_REALTEK &&
974 product == PCI_PRODUCT_REALTEK_RT8139 &&
975 pci_get_revid(dev) != PCI_REVID_REALTEK_RT8139CP) {
976 /* Poor 8139 */
977 return ENXIO;
978 }
979
980 for (t = re_devs; t->re_name != NULL; t++) {
981 if (product == t->re_did && vendor == t->re_vid)
982 break;
983 }
984
985 /*
986 * Check if we found a RealTek device.
987 */
988 if (t->re_name == NULL)
989 return ENXIO;
990
991 /*
992 * Temporarily map the I/O space so we can read the chip ID register.
993 */
994 sc = kmalloc(sizeof(*sc), M_TEMP, M_WAITOK | M_ZERO);
995 rid = RE_PCI_LOIO;
996 sc->re_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
997 RF_ACTIVE);
998 if (sc->re_res == NULL) {
999 device_printf(dev, "couldn't map ports/memory\n");
1000 kfree(sc, M_TEMP);
1001 return ENXIO;
1002 }
1003
1004 sc->re_btag = rman_get_bustag(sc->re_res);
1005 sc->re_bhandle = rman_get_bushandle(sc->re_res);
1006
1007 txcfg = CSR_READ_4(sc, RE_TXCFG);
1008 hwrev = txcfg & RE_TXCFG_HWREV;
1009 macmode = txcfg & RE_TXCFG_MACMODE;
1010 bus_release_resource(dev, SYS_RES_IOPORT, RE_PCI_LOIO, sc->re_res);
1011 kfree(sc, M_TEMP);
1012
1013 /*
1014 * and continue matching for the specific chip...
1015 */
1016 for (hw_rev = re_hwrevs; hw_rev->re_hwrev != RE_HWREV_NULL; hw_rev++) {
1017 if (hw_rev->re_hwrev == hwrev) {
1018 sc = device_get_softc(dev);
1019
1020 sc->re_hwrev = hw_rev->re_hwrev;
1021 sc->re_caps = hw_rev->re_caps;
1022 sc->re_maxmtu = hw_rev->re_maxmtu;
1023
1024 /*
1025 * Apply chip property fixup
1026 */
1027 switch (sc->re_hwrev) {
1028 case RE_HWREV_8168GU:
1029 if (vendor == PCI_VENDOR_REALTEK &&
1030 product == PCI_PRODUCT_REALTEK_RT8101E) {
1031 /* 8106EUS */
1032 sc->re_caps = RE_C_HWCSUM | RE_C_MAC2 |
1033 RE_C_PHYPMGT | RE_C_AUTOPAD |
1034 RE_C_STOP_RXTX | RE_C_FASTE;
1035 sc->re_maxmtu = ETHERMTU;
1036 device_printf(dev, "8106EUS fixup\n");
1037 } else {
1038 /* 8168GU */
1039 goto ee_eaddr1;
1040 }
1041 break;
1042
1043 case RE_HWREV_8168E:
1044 if (vendor == PCI_VENDOR_REALTEK &&
1045 product == PCI_PRODUCT_REALTEK_RT8101E) {
1046 /* 8105E */
1047 sc->re_caps = RE_C_HWCSUM | RE_C_MAC2 |
1048 RE_C_PHYPMGT | RE_C_AUTOPAD |
1049 RE_C_STOP_RXTX | RE_C_FASTE;
1050 sc->re_maxmtu = ETHERMTU;
1051 device_printf(dev, "8105E fixup\n");
1052 goto ee_eaddr0;
1053 }
1054 /* 8168E */
1055 break;
1056
1057 case RE_HWREV_8101E:
1058 case RE_HWREV_8102E:
1059 case RE_HWREV_8102EL:
1060 case RE_HWREV_8401E:
1061 case RE_HWREV_8105E:
1062 case RE_HWREV_8106E:
1063 ee_eaddr0:
1064 sc->re_caps |= RE_C_EE_EADDR;
1065 sc->re_ee_eaddr = RE_EE_EADDR0;
1066 break;
1067
1068 case RE_HWREV_8168F:
1069 case RE_HWREV_8111F:
1070 case RE_HWREV_8168G:
1071 if (macmode == 0 ||
1072 macmode == 0x100000) {
1073 sc->re_caps |= RE_C_EE_EADDR;
1074 sc->re_ee_eaddr = RE_EE_EADDR1;
1075 }
1076 break;
1077
1078 case RE_HWREV_8411:
1079 case RE_HWREV_8168EP:
1080 case RE_HWREV_8411B:
1081 ee_eaddr1:
1082 sc->re_caps |= RE_C_EE_EADDR;
1083 sc->re_ee_eaddr = RE_EE_EADDR1;
1084 break;
1085 }
1086 if (pci_is_pcie(dev))
1087 sc->re_caps |= RE_C_PCIE;
1088
1089 device_set_desc(dev, t->re_name);
1090 return 0;
1091 }
1092 }
1093 device_printf(dev, "unknown hwrev 0x%08x, macmode 0x%08x\n",
1094 hwrev, macmode);
1095
1096 return ENXIO;
1097 }
1098
1099 static int
1100 re_allocmem(device_t dev)
1101 {
1102 struct re_softc *sc = device_get_softc(dev);
1103 bus_dmamem_t dmem;
1104 int error, i;
1105
1106 /*
1107 * Allocate list data
1108 */
1109 sc->re_ldata.re_tx_mbuf =
1110 kmalloc(sc->re_tx_desc_cnt * sizeof(struct mbuf *),
1111 M_DEVBUF, M_ZERO | M_WAITOK);
1112
1113 sc->re_ldata.re_rx_mbuf =
1114 kmalloc(sc->re_rx_desc_cnt * sizeof(struct mbuf *),
1115 M_DEVBUF, M_ZERO | M_WAITOK);
1116
1117 sc->re_ldata.re_rx_paddr =
1118 kmalloc(sc->re_rx_desc_cnt * sizeof(bus_addr_t),
1119 M_DEVBUF, M_ZERO | M_WAITOK);
1120
1121 sc->re_ldata.re_tx_dmamap =
1122 kmalloc(sc->re_tx_desc_cnt * sizeof(bus_dmamap_t),
1123 M_DEVBUF, M_ZERO | M_WAITOK);
1124
1125 sc->re_ldata.re_rx_dmamap =
1126 kmalloc(sc->re_rx_desc_cnt * sizeof(bus_dmamap_t),
1127 M_DEVBUF, M_ZERO | M_WAITOK);
1128
1129 /*
1130 * Allocate the parent bus DMA tag appropriate for PCI.
1131 */
1132 error = bus_dma_tag_create(NULL, /* parent */
1133 1, 0, /* alignment, boundary */
1134 BUS_SPACE_MAXADDR, /* lowaddr */
1135 BUS_SPACE_MAXADDR, /* highaddr */
1136 NULL, NULL, /* filter, filterarg */
1137 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
1138 0, /* nsegments */
1139 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
1140 0, /* flags */
1141 &sc->re_parent_tag);
1142 if (error) {
1143 device_printf(dev, "could not allocate parent dma tag\n");
1144 return error;
1145 }
1146
1147 /* Allocate TX descriptor list. */
1148 error = bus_dmamem_coherent(sc->re_parent_tag,
1149 RE_RING_ALIGN, 0,
1150 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1151 RE_TX_LIST_SZ(sc), BUS_DMA_WAITOK | BUS_DMA_ZERO,
1152 &dmem);
1153 if (error) {
1154 device_printf(dev, "could not allocate TX ring\n");
1155 return error;
1156 }
1157 sc->re_ldata.re_tx_list_tag = dmem.dmem_tag;
1158 sc->re_ldata.re_tx_list_map = dmem.dmem_map;
1159 sc->re_ldata.re_tx_list = dmem.dmem_addr;
1160 sc->re_ldata.re_tx_list_addr = dmem.dmem_busaddr;
1161
1162 /* Allocate RX descriptor list. */
1163 error = bus_dmamem_coherent(sc->re_parent_tag,
1164 RE_RING_ALIGN, 0,
1165 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1166 RE_RX_LIST_SZ(sc), BUS_DMA_WAITOK | BUS_DMA_ZERO,
1167 &dmem);
1168 if (error) {
1169 device_printf(dev, "could not allocate RX ring\n");
1170 return error;
1171 }
1172 sc->re_ldata.re_rx_list_tag = dmem.dmem_tag;
1173 sc->re_ldata.re_rx_list_map = dmem.dmem_map;
1174 sc->re_ldata.re_rx_list = dmem.dmem_addr;
1175 sc->re_ldata.re_rx_list_addr = dmem.dmem_busaddr;
1176
1177 /* Allocate maps for TX mbufs. */
1178 error = bus_dma_tag_create(sc->re_parent_tag,
1179 1, 0,
1180 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1181 NULL, NULL,
1182 RE_FRAMELEN_MAX, RE_MAXSEGS, MCLBYTES,
1183 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,
1184 &sc->re_ldata.re_tx_mtag);
1185 if (error) {
1186 device_printf(dev, "could not allocate TX buf dma tag\n");
1187 return(error);
1188 }
1189
1190 /* Create DMA maps for TX buffers */
1191 for (i = 0; i < sc->re_tx_desc_cnt; i++) {
1192 error = bus_dmamap_create(sc->re_ldata.re_tx_mtag,
1193 BUS_DMA_WAITOK | BUS_DMA_ONEBPAGE,
1194 &sc->re_ldata.re_tx_dmamap[i]);
1195 if (error) {
1196 device_printf(dev, "can't create DMA map for TX buf\n");
1197 re_freebufmem(sc, i, 0);
1198 return(error);
1199 }
1200 }
1201
1202 /* Allocate maps for RX mbufs. */
1203 error = bus_dma_tag_create(sc->re_parent_tag,
1204 RE_RXBUF_ALIGN, 0,
1205 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1206 NULL, NULL,
1207 MCLBYTES, 1, MCLBYTES,
1208 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK | BUS_DMA_ALIGNED,
1209 &sc->re_ldata.re_rx_mtag);
1210 if (error) {
1211 device_printf(dev, "could not allocate RX buf dma tag\n");
1212 return(error);
1213 }
1214
1215 /* Create spare DMA map for RX */
1216 error = bus_dmamap_create(sc->re_ldata.re_rx_mtag, BUS_DMA_WAITOK,
1217 &sc->re_ldata.re_rx_spare);
1218 if (error) {
1219 device_printf(dev, "can't create spare DMA map for RX\n");
1220 bus_dma_tag_destroy(sc->re_ldata.re_rx_mtag);
1221 sc->re_ldata.re_rx_mtag = NULL;
1222 return error;
1223 }
1224
1225 /* Create DMA maps for RX buffers */
1226 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
1227 error = bus_dmamap_create(sc->re_ldata.re_rx_mtag,
1228 BUS_DMA_WAITOK, &sc->re_ldata.re_rx_dmamap[i]);
1229 if (error) {
1230 device_printf(dev, "can't create DMA map for RX buf\n");
1231 re_freebufmem(sc, sc->re_tx_desc_cnt, i);
1232 return(error);
1233 }
1234 }
1235
1236 /* Create jumbo buffer pool for RX if required */
1237 if (sc->re_caps & RE_C_CONTIGRX) {
1238 error = re_jpool_alloc(sc);
1239 if (error) {
1240 re_jpool_free(sc);
1241 /* Disable jumbo frame support */
1242 sc->re_maxmtu = ETHERMTU;
1243 }
1244 }
1245 return(0);
1246 }
1247
1248 static void
1249 re_freebufmem(struct re_softc *sc, int tx_cnt, int rx_cnt)
1250 {
1251 int i;
1252
1253 /* Destroy all the RX and TX buffer maps */
1254 if (sc->re_ldata.re_tx_mtag) {
1255 for (i = 0; i < tx_cnt; i++) {
1256 bus_dmamap_destroy(sc->re_ldata.re_tx_mtag,
1257 sc->re_ldata.re_tx_dmamap[i]);
1258 }
1259 bus_dma_tag_destroy(sc->re_ldata.re_tx_mtag);
1260 sc->re_ldata.re_tx_mtag = NULL;
1261 }
1262
1263 if (sc->re_ldata.re_rx_mtag) {
1264 for (i = 0; i < rx_cnt; i++) {
1265 bus_dmamap_destroy(sc->re_ldata.re_rx_mtag,
1266 sc->re_ldata.re_rx_dmamap[i]);
1267 }
1268 bus_dmamap_destroy(sc->re_ldata.re_rx_mtag,
1269 sc->re_ldata.re_rx_spare);
1270 bus_dma_tag_destroy(sc->re_ldata.re_rx_mtag);
1271 sc->re_ldata.re_rx_mtag = NULL;
1272 }
1273 }
1274
1275 static void
1276 re_freemem(device_t dev)
1277 {
1278 struct re_softc *sc = device_get_softc(dev);
1279
1280 /* Unload and free the RX DMA ring memory and map */
1281 if (sc->re_ldata.re_rx_list_tag) {
1282 bus_dmamap_unload(sc->re_ldata.re_rx_list_tag,
1283 sc->re_ldata.re_rx_list_map);
1284 bus_dmamem_free(sc->re_ldata.re_rx_list_tag,
1285 sc->re_ldata.re_rx_list,
1286 sc->re_ldata.re_rx_list_map);
1287 bus_dma_tag_destroy(sc->re_ldata.re_rx_list_tag);
1288 }
1289
1290 /* Unload and free the TX DMA ring memory and map */
1291 if (sc->re_ldata.re_tx_list_tag) {
1292 bus_dmamap_unload(sc->re_ldata.re_tx_list_tag,
1293 sc->re_ldata.re_tx_list_map);
1294 bus_dmamem_free(sc->re_ldata.re_tx_list_tag,
1295 sc->re_ldata.re_tx_list,
1296 sc->re_ldata.re_tx_list_map);
1297 bus_dma_tag_destroy(sc->re_ldata.re_tx_list_tag);
1298 }
1299
1300 /* Free RX/TX buf DMA stuffs */
1301 re_freebufmem(sc, sc->re_tx_desc_cnt, sc->re_rx_desc_cnt);
1302
1303 /* Unload and free the stats buffer and map */
1304 if (sc->re_ldata.re_stag) {
1305 bus_dmamap_unload(sc->re_ldata.re_stag, sc->re_ldata.re_smap);
1306 bus_dmamem_free(sc->re_ldata.re_stag,
1307 sc->re_ldata.re_stats,
1308 sc->re_ldata.re_smap);
1309 bus_dma_tag_destroy(sc->re_ldata.re_stag);
1310 }
1311
1312 if (sc->re_caps & RE_C_CONTIGRX)
1313 re_jpool_free(sc);
1314
1315 if (sc->re_parent_tag)
1316 bus_dma_tag_destroy(sc->re_parent_tag);
1317
1318 if (sc->re_ldata.re_tx_mbuf != NULL)
1319 kfree(sc->re_ldata.re_tx_mbuf, M_DEVBUF);
1320 if (sc->re_ldata.re_rx_mbuf != NULL)
1321 kfree(sc->re_ldata.re_rx_mbuf, M_DEVBUF);
1322 if (sc->re_ldata.re_rx_paddr != NULL)
1323 kfree(sc->re_ldata.re_rx_paddr, M_DEVBUF);
1324 if (sc->re_ldata.re_tx_dmamap != NULL)
1325 kfree(sc->re_ldata.re_tx_dmamap, M_DEVBUF);
1326 if (sc->re_ldata.re_rx_dmamap != NULL)
1327 kfree(sc->re_ldata.re_rx_dmamap, M_DEVBUF);
1328 }
1329
1330 /*
1331 * Attach the interface. Allocate softc structures, do ifmedia
1332 * setup and ethernet/BPF attach.
1333 */
1334 static int
1335 re_attach(device_t dev)
1336 {
1337 struct re_softc *sc = device_get_softc(dev);
1338 struct ifnet *ifp;
1339 uint8_t eaddr[ETHER_ADDR_LEN];
1340 int error = 0, qlen, msi_enable;
1341 u_int irq_flags;
1342
1343 callout_init(&sc->re_timer);
1344 sc->re_dev = dev;
1345
1346 if (RE_IS_8139CP(sc)) {
1347 sc->re_rx_desc_cnt = RE_RX_DESC_CNT_8139CP;
1348 sc->re_tx_desc_cnt = RE_TX_DESC_CNT_8139CP;
1349 } else {
1350 sc->re_rx_desc_cnt = re_rx_desc_count;
1351 if (sc->re_rx_desc_cnt > RE_RX_DESC_CNT_MAX)
1352 sc->re_rx_desc_cnt = RE_RX_DESC_CNT_MAX;
1353
1354 sc->re_tx_desc_cnt = re_tx_desc_count;
1355 if (sc->re_tx_desc_cnt > RE_TX_DESC_CNT_MAX)
1356 sc->re_tx_desc_cnt = RE_TX_DESC_CNT_MAX;
1357 }
1358
1359 qlen = RE_IFQ_MAXLEN;
1360 if (sc->re_tx_desc_cnt > qlen)
1361 qlen = sc->re_tx_desc_cnt;
1362
1363 sc->re_rxbuf_size = MCLBYTES;
1364 sc->re_newbuf = re_newbuf_std;
1365
1366 sc->re_tx_time = 5; /* 125us */
1367 sc->re_rx_time = 2; /* 50us */
1368 if (sc->re_caps & RE_C_PCIE)
1369 sc->re_sim_time = 75; /* 75us */
1370 else
1371 sc->re_sim_time = 125; /* 125us */
1372 if (!RE_IS_8139CP(sc)) {
1373 /* simulated interrupt moderation */
1374 sc->re_imtype = RE_IMTYPE_SIM;
1375 } else {
1376 sc->re_imtype = RE_IMTYPE_NONE;
1377 }
1378 re_config_imtype(sc, sc->re_imtype);
1379
1380 sysctl_ctx_init(&sc->re_sysctl_ctx);
1381 sc->re_sysctl_tree = SYSCTL_ADD_NODE(&sc->re_sysctl_ctx,
1382 SYSCTL_STATIC_CHILDREN(_hw),
1383 OID_AUTO,
1384 device_get_nameunit(dev),
1385 CTLFLAG_RD, 0, "");
1386 if (sc->re_sysctl_tree == NULL) {
1387 device_printf(dev, "can't add sysctl node\n");
1388 error = ENXIO;
1389 goto fail;
1390 }
1391 SYSCTL_ADD_INT(&sc->re_sysctl_ctx,
1392 SYSCTL_CHILDREN(sc->re_sysctl_tree), OID_AUTO,
1393 "rx_desc_count", CTLFLAG_RD, &sc->re_rx_desc_cnt,
1394 0, "RX desc count");
1395 SYSCTL_ADD_INT(&sc->re_sysctl_ctx,
1396 SYSCTL_CHILDREN(sc->re_sysctl_tree), OID_AUTO,
1397 "tx_desc_count", CTLFLAG_RD, &sc->re_tx_desc_cnt,
1398 0, "TX desc count");
1399 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1400 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1401 OID_AUTO, "sim_time",
1402 CTLTYPE_INT | CTLFLAG_RW,
1403 sc, 0, re_sysctl_simtime, "I",
1404 "Simulated interrupt moderation time (usec).");
1405 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1406 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1407 OID_AUTO, "imtype",
1408 CTLTYPE_INT | CTLFLAG_RW,
1409 sc, 0, re_sysctl_imtype, "I",
1410 "Interrupt moderation type -- "
1411 "0:disable, 1:simulated, "
1412 "2:hardware(if supported)");
1413 if (sc->re_caps & RE_C_HWIM) {
1414 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1415 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1416 OID_AUTO, "hw_rxtime",
1417 CTLTYPE_INT | CTLFLAG_RW,
1418 sc, 0, re_sysctl_rxtime, "I",
1419 "Hardware interrupt moderation time "
1420 "(unit: 25usec).");
1421 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1422 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1423 OID_AUTO, "hw_txtime",
1424 CTLTYPE_INT | CTLFLAG_RW,
1425 sc, 0, re_sysctl_txtime, "I",
1426 "Hardware interrupt moderation time "
1427 "(unit: 25usec).");
1428 }
1429
1430 #ifndef BURN_BRIDGES
1431 /*
1432 * Handle power management nonsense.
1433 */
1434
1435 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
1436 uint32_t membase, irq;
1437
1438 /* Save important PCI config data. */
1439 membase = pci_read_config(dev, RE_PCI_LOMEM, 4);
1440 irq = pci_read_config(dev, PCIR_INTLINE, 4);
1441
1442 /* Reset the power state. */
1443 device_printf(dev, "chip is in D%d power mode "
1444 "-- setting to D0\n", pci_get_powerstate(dev));
1445
1446 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
1447
1448 /* Restore PCI config data. */
1449 pci_write_config(dev, RE_PCI_LOMEM, membase, 4);
1450 pci_write_config(dev, PCIR_INTLINE, irq, 4);
1451 }
1452 #endif
1453 /*
1454 * Map control/status registers.
1455 */
1456 pci_enable_busmaster(dev);
1457
1458 if (pci_is_pcie(dev)) {
1459 sc->re_res_rid = PCIR_BAR(2);
1460 sc->re_res_type = SYS_RES_MEMORY;
1461 } else {
1462 sc->re_res_rid = PCIR_BAR(0);
1463 sc->re_res_type = SYS_RES_IOPORT;
1464 }
1465 sc->re_res = bus_alloc_resource_any(dev, sc->re_res_type,
1466 &sc->re_res_rid, RF_ACTIVE);
1467 if (sc->re_res == NULL) {
1468 device_printf(dev, "couldn't map IO\n");
1469 error = ENXIO;
1470 goto fail;
1471 }
1472
1473 sc->re_btag = rman_get_bustag(sc->re_res);
1474 sc->re_bhandle = rman_get_bushandle(sc->re_res);
1475
1476 /*
1477 * Allocate interrupt
1478 */
1479 if (pci_is_pcie(dev))
1480 msi_enable = re_msi_enable;
1481 else
1482 msi_enable = 0;
1483 sc->re_irq_type = pci_alloc_1intr(dev, msi_enable,
1484 &sc->re_irq_rid, &irq_flags);
1485
1486 sc->re_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->re_irq_rid,
1487 irq_flags);
1488 if (sc->re_irq == NULL) {
1489 device_printf(dev, "couldn't map interrupt\n");
1490 error = ENXIO;
1491 goto fail;
1492 }
1493
1494 /* Reset the adapter. */
1495 re_reset(sc, 0);
1496
1497 if (RE_IS_8139CP(sc)) {
1498 sc->re_bus_speed = 33; /* XXX */
1499 } else if (sc->re_caps & RE_C_PCIE) {
1500 sc->re_bus_speed = 125;
1501 } else {
1502 uint8_t cfg2;
1503
1504 cfg2 = CSR_READ_1(sc, RE_CFG2);
1505 switch (cfg2 & RE_CFG2_PCICLK_MASK) {
1506 case RE_CFG2_PCICLK_33MHZ:
1507 sc->re_bus_speed = 33;
1508 break;
1509 case RE_CFG2_PCICLK_66MHZ:
1510 sc->re_bus_speed = 66;
1511 break;
1512 default:
1513 device_printf(dev, "unknown bus speed, assume 33MHz\n");
1514 sc->re_bus_speed = 33;
1515 break;
1516 }
1517 if (cfg2 & RE_CFG2_PCI64)
1518 sc->re_caps |= RE_C_PCI64;
1519 }
1520 device_printf(dev, "Hardware rev. 0x%08x; PCI%s %dMHz\n",
1521 sc->re_hwrev,
1522 (sc->re_caps & RE_C_PCIE) ?
1523 "-E" : ((sc->re_caps & RE_C_PCI64) ? "64" : "32"),
1524 sc->re_bus_speed);
1525
1526 /*
1527 * NOTE:
1528 * DO NOT try to adjust config1 and config5 which was spotted in
1529 * Realtek's Linux drivers. It will _permanently_ damage certain
1530 * cards EEPROM, e.g. one of my 8168B (0x38000000) card ...
1531 */
1532
1533 re_get_eaddr(sc, eaddr);
1534
1535 if (!RE_IS_8139CP(sc)) {
1536 /* Set RX length mask */
1537 sc->re_rxlenmask = RE_RDESC_STAT_GFRAGLEN;
1538 sc->re_txstart = RE_GTXSTART;
1539 } else {
1540 /* Set RX length mask */
1541 sc->re_rxlenmask = RE_RDESC_STAT_FRAGLEN;
1542 sc->re_txstart = RE_TXSTART;
1543 }
1544
1545 /* Allocate DMA stuffs */
1546 error = re_allocmem(dev);
1547 if (error)
1548 goto fail;
1549
1550 /*
1551 * Apply some magic PCI settings from Realtek ...
1552 */
1553 if (RE_IS_8169(sc)) {
1554 CSR_WRITE_1(sc, 0x82, 1);
1555 pci_write_config(dev, PCIR_CACHELNSZ, 0x8, 1);
1556 }
1557 pci_write_config(dev, PCIR_LATTIMER, 0x40, 1);
1558
1559 if (sc->re_caps & RE_C_MAC2) {
1560 /*
1561 * Following part is extracted from Realtek BSD driver v176.
1562 * However, this does _not_ make much/any sense:
1563 * 8168C's PCI Express device control is located at 0x78,
1564 * so the reading from 0x79 (higher part of 0x78) and setting
1565 * the 4~6bits intend to enlarge the "max read request size"
1566 * (we will do it). The content of the rest part of this
1567 * register is not meaningful to other PCI registers, so
1568 * writing the value to 0x54 could be completely wrong.
1569 * 0x80 is the lower part of PCI Express device status, non-
1570 * reserved bits are RW1C, writing 0 to them will not have
1571 * any effect at all.
1572 */
1573 #ifdef foo
1574 uint8_t val;
1575
1576 val = pci_read_config(dev, 0x79, 1);
1577 val = (val & ~0x70) | 0x50;
1578 pci_write_config(dev, 0x54, val, 1);
1579 pci_write_config(dev, 0x80, 0, 1);
1580 #endif
1581 }
1582
1583 /*
1584 * Apply some PHY fixup from Realtek ...
1585 */
1586 if (sc->re_hwrev == RE_HWREV_8110S) {
1587 CSR_WRITE_1(sc, 0x82, 1);
1588 re_miibus_writereg(dev, 1, 0xb, 0);
1589 }
1590 if (sc->re_caps & RE_C_PHYPMGT) {
1591 /* Power up PHY */
1592 re_miibus_writereg(dev, 1, 0x1f, 0);
1593 re_miibus_writereg(dev, 1, 0xe, 0);
1594 }
1595
1596 /* Do MII setup */
1597 if (mii_phy_probe(dev, &sc->re_miibus,
1598 re_ifmedia_upd, re_ifmedia_sts)) {
1599 device_printf(dev, "MII without any phy!\n");
1600 error = ENXIO;
1601 goto fail;
1602 }
1603
1604 ifp = &sc->arpcom.ac_if;
1605 ifp->if_softc = sc;
1606 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1607 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
1608 ifp->if_ioctl = re_ioctl;
1609 ifp->if_start = re_start;
1610 #ifdef IFPOLL_ENABLE
1611 ifp->if_npoll = re_npoll;
1612 #endif
1613 ifp->if_watchdog = re_watchdog;
1614 ifp->if_init = re_init;
1615 if (!RE_IS_8139CP(sc)) /* XXX */
1616 ifp->if_baudrate = 1000000000;
1617 else
1618 ifp->if_baudrate = 100000000;
1619 ifq_set_maxlen(&ifp->if_snd, qlen);
1620 ifq_set_ready(&ifp->if_snd);
1621
1622 ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING;
1623 if (sc->re_caps & RE_C_HWCSUM)
1624 ifp->if_capabilities |= IFCAP_HWCSUM;
1625
1626 ifp->if_capenable = ifp->if_capabilities;
1627 if (ifp->if_capabilities & IFCAP_HWCSUM) {
1628 /*
1629 * RTL8168/8111C generates wrong IP checksummed frame if the
1630 * packet has IP options so disable TX IP checksum offloading.
1631 */
1632 if (sc->re_hwrev == RE_HWREV_8168CP ||
1633 sc->re_hwrev == RE_HWREV_8168C)
1634 sc->re_hwassist = CSUM_TCP | CSUM_UDP;
1635 else
1636 sc->re_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP;
1637 }
1638 ifp->if_hwassist = sc->re_hwassist;
1639
1640 /*
1641 * Call MI attach routine.
1642 */
1643 ether_ifattach(ifp, eaddr, NULL);
1644
1645 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->re_irq));
1646
1647 #ifdef IFPOLL_ENABLE
1648 ifpoll_compat_setup(&sc->re_npoll,
1649 &sc->re_sysctl_ctx, sc->re_sysctl_tree, device_get_unit(dev),
1650 ifp->if_serializer);
1651 #endif
1652
1653 #ifdef RE_DIAG
1654 /*
1655 * Perform hardware diagnostic on the original RTL8169.
1656 * Some 32-bit cards were incorrectly wired and would
1657 * malfunction if plugged into a 64-bit slot.
1658 */
1659 if (sc->re_hwrev == RE_HWREV_8169) {
1660 lwkt_serialize_enter(ifp->if_serializer);
1661 error = re_diag(sc);
1662 lwkt_serialize_exit(ifp->if_serializer);
1663
1664 if (error) {
1665 device_printf(dev, "hardware diagnostic failure\n");
1666 ether_ifdetach(ifp);
1667 goto fail;
1668 }
1669 }
1670 #endif /* RE_DIAG */
1671
1672 /* Hook interrupt last to avoid having to lock softc */
1673 error = bus_setup_intr(dev, sc->re_irq, INTR_MPSAFE, re_intr, sc,
1674 &sc->re_intrhand, ifp->if_serializer);
1675
1676 if (error) {
1677 device_printf(dev, "couldn't set up irq\n");
1678 ether_ifdetach(ifp);
1679 goto fail;
1680 }
1681
1682 fail:
1683 if (error)
1684 re_detach(dev);
1685
1686 return (error);
1687 }
1688
1689 /*
1690 * Shutdown hardware and free up resources. This can be called any
1691 * time after the mutex has been initialized. It is called in both
1692 * the error case in attach and the normal detach case so it needs
1693 * to be careful about only freeing resources that have actually been
1694 * allocated.
1695 */
1696 static int
1697 re_detach(device_t dev)
1698 {
1699 struct re_softc *sc = device_get_softc(dev);
1700 struct ifnet *ifp = &sc->arpcom.ac_if;
1701
1702 /* These should only be active if attach succeeded */
1703 if (device_is_attached(dev)) {
1704 lwkt_serialize_enter(ifp->if_serializer);
1705 re_stop(sc);
1706 bus_teardown_intr(dev, sc->re_irq, sc->re_intrhand);
1707 lwkt_serialize_exit(ifp->if_serializer);
1708
1709 ether_ifdetach(ifp);
1710 }
1711 if (sc->re_miibus)
1712 device_delete_child(dev, sc->re_miibus);
1713 bus_generic_detach(dev);
1714
1715 if (sc->re_sysctl_tree != NULL)
1716 sysctl_ctx_free(&sc->re_sysctl_ctx);
1717
1718 if (sc->re_irq)
1719 bus_release_resource(dev, SYS_RES_IRQ, sc->re_irq_rid,
1720 sc->re_irq);
1721
1722 if (sc->re_irq_type == PCI_INTR_TYPE_MSI)
1723 pci_release_msi(dev);
1724
1725 if (sc->re_res) {
1726 bus_release_resource(dev, sc->re_res_type, sc->re_res_rid,
1727 sc->re_res);
1728 }
1729
1730 /* Free DMA stuffs */
1731 re_freemem(dev);
1732
1733 return(0);
1734 }
1735
1736 static void
1737 re_setup_rxdesc(struct re_softc *sc, int idx)
1738 {
1739 bus_addr_t paddr;
1740 uint32_t cmdstat;
1741 struct re_desc *d;
1742
1743 paddr = sc->re_ldata.re_rx_paddr[idx];
1744 d = &sc->re_ldata.re_rx_list[idx];
1745
1746 d->re_bufaddr_lo = htole32(RE_ADDR_LO(paddr));
1747 d->re_bufaddr_hi = htole32(RE_ADDR_HI(paddr));
1748
1749 cmdstat = sc->re_rxbuf_size | RE_RDESC_CMD_OWN;
1750 if (idx == (sc->re_rx_desc_cnt - 1))
1751 cmdstat |= RE_RDESC_CMD_EOR;
1752 d->re_cmdstat = htole32(cmdstat);
1753 }
1754
1755 static int
1756 re_newbuf_std(struct re_softc *sc, int idx, int init)
1757 {
1758 bus_dma_segment_t seg;
1759 bus_dmamap_t map;
1760 struct mbuf *m;
1761 int error, nsegs;
1762
1763 m = m_getcl(init ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR);
1764 if (m == NULL) {
1765 error = ENOBUFS;
1766
1767 if (init) {
1768 if_printf(&sc->arpcom.ac_if, "m_getcl failed\n");
1769 return error;
1770 } else {
1771 goto back;
1772 }
1773 }
1774 m->m_len = m->m_pkthdr.len = MCLBYTES;
1775
1776 /*
1777 * NOTE:
1778 * re(4) chips need address of the receive buffer to be 8-byte
1779 * aligned, so don't call m_adj(m, ETHER_ALIGN) here.
1780 */
1781
1782 error = bus_dmamap_load_mbuf_segment(sc->re_ldata.re_rx_mtag,
1783 sc->re_ldata.re_rx_spare, m,
1784 &seg, 1, &nsegs, BUS_DMA_NOWAIT);
1785 if (error) {
1786 m_freem(m);
1787 if (init) {
1788 if_printf(&sc->arpcom.ac_if, "can't load RX mbuf\n");
1789 return error;
1790 } else {
1791 goto back;
1792 }
1793 }
1794
1795 if (!init) {
1796 bus_dmamap_sync(sc->re_ldata.re_rx_mtag,
1797 sc->re_ldata.re_rx_dmamap[idx],
1798 BUS_DMASYNC_POSTREAD);
1799 bus_dmamap_unload(sc->re_ldata.re_rx_mtag,
1800 sc->re_ldata.re_rx_dmamap[idx]);
1801 }
1802 sc->re_ldata.re_rx_mbuf[idx] = m;
1803 sc->re_ldata.re_rx_paddr[idx] = seg.ds_addr;
1804
1805 map = sc->re_ldata.re_rx_dmamap[idx];
1806 sc->re_ldata.re_rx_dmamap[idx] = sc->re_ldata.re_rx_spare;
1807 sc->re_ldata.re_rx_spare = map;
1808 back:
1809 re_setup_rxdesc(sc, idx);
1810 return error;
1811 }
1812
1813 static int
1814 re_newbuf_jumbo(struct re_softc *sc, int idx, int init)
1815 {
1816 struct mbuf *m;
1817 struct re_jbuf *jbuf;
1818 int error = 0;
1819
1820 MGETHDR(m, init ? MB_WAIT : MB_DONTWAIT, MT_DATA);
1821 if (m == NULL) {
1822 error = ENOBUFS;
1823 if (init) {
1824 if_printf(&sc->arpcom.ac_if, "MGETHDR failed\n");
1825 return error;
1826 } else {
1827 goto back;
1828 }
1829 }
1830
1831 jbuf = re_jbuf_alloc(sc);
1832 if (jbuf == NULL) {
1833 m_freem(m);
1834
1835 error = ENOBUFS;
1836 if (init) {
1837 if_printf(&sc->arpcom.ac_if, "jpool is empty\n");
1838 return error;
1839 } else {
1840 goto back;
1841 }
1842 }
1843
1844 m->m_ext.ext_arg = jbuf;
1845 m->m_ext.ext_buf = jbuf->re_buf;
1846 m->m_ext.ext_free = re_jbuf_free;
1847 m->m_ext.ext_ref = re_jbuf_ref;
1848 m->m_ext.ext_size = sc->re_rxbuf_size;
1849
1850 m->m_data = m->m_ext.ext_buf;
1851 m->m_flags |= M_EXT;
1852 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
1853
1854 /*
1855 * NOTE:
1856 * Some re(4) chips(e.g. RTL8101E) need address of the receive buffer
1857 * to be 8-byte aligned, so don't call m_adj(m, ETHER_ALIGN) here.
1858 */
1859
1860 sc->re_ldata.re_rx_mbuf[idx] = m;
1861 sc->re_ldata.re_rx_paddr[idx] = jbuf->re_paddr;
1862 back:
1863 re_setup_rxdesc(sc, idx);
1864 return error;
1865 }
1866
1867 static int
1868 re_tx_list_init(struct re_softc *sc)
1869 {
1870 bzero(sc->re_ldata.re_tx_list, RE_TX_LIST_SZ(sc));
1871
1872 sc->re_ldata.re_tx_prodidx = 0;
1873 sc->re_ldata.re_tx_considx = 0;
1874 sc->re_ldata.re_tx_free = sc->re_tx_desc_cnt;
1875
1876 return(0);
1877 }
1878
1879 static int
1880 re_rx_list_init(struct re_softc *sc)
1881 {
1882 int i, error;
1883
1884 bzero(sc->re_ldata.re_rx_list, RE_RX_LIST_SZ(sc));
1885
1886 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
1887 error = sc->re_newbuf(sc, i, 1);
1888 if (error)
1889 return(error);
1890 }
1891
1892 sc->re_ldata.re_rx_prodidx = 0;
1893 sc->re_head = sc->re_tail = NULL;
1894
1895 return(0);
1896 }
1897
1898 #define RE_IP4_PACKET 0x1
1899 #define RE_TCP_PACKET 0x2
1900 #define RE_UDP_PACKET 0x4
1901
1902 static __inline uint8_t
1903 re_packet_type(struct re_softc *sc, uint32_t rxstat, uint32_t rxctrl)
1904 {
1905 uint8_t packet_type = 0;
1906
1907 if (sc->re_caps & RE_C_MAC2) {
1908 if (rxctrl & RE_RDESC_CTL_PROTOIP4)
1909 packet_type |= RE_IP4_PACKET;
1910 } else {
1911 if (rxstat & RE_RDESC_STAT_PROTOID)
1912 packet_type |= RE_IP4_PACKET;
1913 }
1914 if (RE_TCPPKT(rxstat))
1915 packet_type |= RE_TCP_PACKET;
1916 else if (RE_UDPPKT(rxstat))
1917 packet_type |= RE_UDP_PACKET;
1918 return packet_type;
1919 }
1920
1921 /*
1922 * RX handler for C+ and 8169. For the gigE chips, we support
1923 * the reception of jumbo frames that have been fragmented
1924 * across multiple 2K mbuf cluster buffers.
1925 */
1926 static int
1927 re_rxeof(struct re_softc *sc)
1928 {
1929 struct ifnet *ifp = &sc->arpcom.ac_if;
1930 struct mbuf *m;
1931 struct re_desc *cur_rx;
1932 uint32_t rxstat, rxctrl;
1933 int i, total_len, rx = 0;
1934
1935 for (i = sc->re_ldata.re_rx_prodidx;
1936 RE_OWN(&sc->re_ldata.re_rx_list[i]) == 0; RE_RXDESC_INC(sc, i)) {
1937 cur_rx = &sc->re_ldata.re_rx_list[i];
1938 m = sc->re_ldata.re_rx_mbuf[i];
1939 total_len = RE_RXBYTES(cur_rx);
1940 rxstat = le32toh(cur_rx->re_cmdstat);
1941 rxctrl = le32toh(cur_rx->re_control);
1942
1943 rx = 1;
1944
1945 #ifdef INVARIANTS
1946 if (sc->re_flags & RE_F_USE_JPOOL)
1947 KKASSERT(rxstat & RE_RDESC_STAT_EOF);
1948 #endif
1949
1950 if ((rxstat & RE_RDESC_STAT_EOF) == 0) {
1951 if (sc->re_flags & RE_F_DROP_RXFRAG) {
1952 re_setup_rxdesc(sc, i);
1953 continue;
1954 }
1955
1956 if (sc->re_newbuf(sc, i, 0)) {
1957 /* Drop upcoming fragments */
1958 sc->re_flags |= RE_F_DROP_RXFRAG;
1959 continue;
1960 }
1961
1962 m->m_len = MCLBYTES;
1963 if (sc->re_head == NULL) {
1964 sc->re_head = sc->re_tail = m;
1965 } else {
1966 sc->re_tail->m_next = m;
1967 sc->re_tail = m;
1968 }
1969 continue;
1970 } else if (sc->re_flags & RE_F_DROP_RXFRAG) {
1971 /*
1972 * Last fragment of a multi-fragment packet.
1973 *
1974 * Since error already happened, this fragment
1975 * must be dropped as well as the fragment chain.
1976 */
1977 re_setup_rxdesc(sc, i);
1978 re_free_rxchain(sc);
1979 sc->re_flags &= ~RE_F_DROP_RXFRAG;
1980 continue;
1981 }
1982
1983 /*
1984 * NOTE: for the 8139C+, the frame length field
1985 * is always 12 bits in size, but for the gigE chips,
1986 * it is 13 bits (since the max RX frame length is 16K).
1987 * Unfortunately, all 32 bits in the status word
1988 * were already used, so to make room for the extra
1989 * length bit, RealTek took out the 'frame alignment
1990 * error' bit and shifted the other status bits
1991 * over one slot. The OWN, EOR, FS and LS bits are
1992 * still in the same places. We have already extracted
1993 * the frame length and checked the OWN bit, so rather
1994 * than using an alternate bit mapping, we shift the
1995 * status bits one space to the right so we can evaluate
1996 * them using the 8169 status as though it was in the
1997 * same format as that of the 8139C+.
1998 */
1999 if (!RE_IS_8139CP(sc))
2000 rxstat >>= 1;
2001
2002 if (rxstat & RE_RDESC_STAT_RXERRSUM) {
2003 IFNET_STAT_INC(ifp, ierrors, 1);
2004 /*
2005 * If this is part of a multi-fragment packet,
2006 * discard all the pieces.
2007 */
2008 re_free_rxchain(sc);
2009 re_setup_rxdesc(sc, i);
2010 continue;
2011 }
2012
2013 /*
2014 * If allocating a replacement mbuf fails,
2015 * reload the current one.
2016 */
2017
2018 if (sc->re_newbuf(sc, i, 0)) {
2019 IFNET_STAT_INC(ifp, ierrors, 1);
2020 continue;
2021 }
2022
2023 if (sc->re_head != NULL) {
2024 m->m_len = total_len % MCLBYTES;
2025 /*
2026 * Special case: if there's 4 bytes or less
2027 * in this buffer, the mbuf can be discarded:
2028 * the last 4 bytes is the CRC, which we don't
2029 * care about anyway.
2030 */
2031 if (m->m_len <= ETHER_CRC_LEN) {
2032 sc->re_tail->m_len -=
2033 (ETHER_CRC_LEN - m->m_len);
2034 m_freem(m);
2035 } else {
2036 m->m_len -= ETHER_CRC_LEN;
2037 sc->re_tail->m_next = m;
2038 }
2039 m = sc->re_head;
2040 sc->re_head = sc->re_tail = NULL;
2041 m->m_pkthdr.len = total_len - ETHER_CRC_LEN;
2042 } else {
2043 m->m_pkthdr.len = m->m_len =
2044 (total_len - ETHER_CRC_LEN);
2045 }
2046
2047 IFNET_STAT_INC(ifp, ipackets, 1);
2048 m->m_pkthdr.rcvif = ifp;
2049
2050 /* Do RX checksumming if enabled */
2051
2052 if (ifp->if_capenable & IFCAP_RXCSUM) {
2053 uint8_t packet_type;
2054
2055 packet_type = re_packet_type(sc, rxstat, rxctrl);
2056
2057 /* Check IP header checksum */
2058 if (packet_type & RE_IP4_PACKET) {
2059 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
2060 if ((rxstat & RE_RDESC_STAT_IPSUMBAD) == 0)
2061 m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
2062 }
2063
2064 /* Check TCP/UDP checksum */
2065 if (((packet_type & RE_TCP_PACKET) &&
2066 (rxstat & RE_RDESC_STAT_TCPSUMBAD) == 0) ||
2067 ((packet_type & RE_UDP_PACKET) &&
2068 (rxstat & RE_RDESC_STAT_UDPSUMBAD) == 0)) {
2069 m->m_pkthdr.csum_flags |=
2070 CSUM_DATA_VALID|CSUM_PSEUDO_HDR|
2071 CSUM_FRAG_NOT_CHECKED;
2072 m->m_pkthdr.csum_data = 0xffff;
2073 }
2074 }
2075
2076 if (rxctrl & RE_RDESC_CTL_HASTAG) {
2077 m->m_flags |= M_VLANTAG;
2078 m->m_pkthdr.ether_vlantag =
2079 be16toh((rxctrl & RE_RDESC_CTL_TAGDATA));
2080 }
2081 ifp->if_input(ifp, m);
2082 }
2083
2084 sc->re_ldata.re_rx_prodidx = i;
2085
2086 return rx;
2087 }
2088
2089 #undef RE_IP4_PACKET
2090 #undef RE_TCP_PACKET
2091 #undef RE_UDP_PACKET
2092
2093 static int
2094 re_tx_collect(struct re_softc *sc)
2095 {
2096 struct ifnet *ifp = &sc->arpcom.ac_if;
2097 uint32_t txstat;
2098 int idx, tx = 0;
2099
2100 for (idx = sc->re_ldata.re_tx_considx;
2101 sc->re_ldata.re_tx_free < sc->re_tx_desc_cnt;
2102 RE_TXDESC_INC(sc, idx)) {
2103 txstat = le32toh(sc->re_ldata.re_tx_list[idx].re_cmdstat);
2104 if (txstat & RE_TDESC_CMD_OWN)
2105 break;
2106
2107 tx = 1;
2108
2109 sc->re_ldata.re_tx_list[idx].re_bufaddr_lo = 0;
2110
2111 /*
2112 * We only stash mbufs in the last descriptor
2113 * in a fragment chain, which also happens to
2114 * be the only place where the TX status bits
2115 * are valid.
2116 */
2117 if (txstat & RE_TDESC_CMD_EOF) {
2118 bus_dmamap_unload(sc->re_ldata.re_tx_mtag,
2119 sc->re_ldata.re_tx_dmamap[idx]);
2120 m_freem(sc->re_ldata.re_tx_mbuf[idx]);
2121 sc->re_ldata.re_tx_mbuf[idx] = NULL;
2122 if (txstat & (RE_TDESC_STAT_EXCESSCOL|
2123 RE_TDESC_STAT_COLCNT))
2124 IFNET_STAT_INC(ifp, collisions, 1);
2125 if (txstat & RE_TDESC_STAT_TXERRSUM)
2126 IFNET_STAT_INC(ifp, oerrors, 1);
2127 else
2128 IFNET_STAT_INC(ifp, opackets, 1);
2129 }
2130 sc->re_ldata.re_tx_free++;
2131 }
2132 sc->re_ldata.re_tx_considx = idx;
2133
2134 return tx;
2135 }
2136
2137 static int
2138 re_txeof(struct re_softc *sc)
2139 {
2140 struct ifnet *ifp = &sc->arpcom.ac_if;
2141 int tx;
2142
2143 tx = re_tx_collect(sc);
2144
2145 /* There is enough free TX descs */
2146 if (sc->re_ldata.re_tx_free > RE_TXDESC_SPARE)
2147 ifq_clr_oactive(&ifp->if_snd);
2148
2149 /*
2150 * Some chips will ignore a second TX request issued while an
2151 * existing transmission is in progress. If the transmitter goes
2152 * idle but there are still packets waiting to be sent, we need
2153 * to restart the channel here to flush them out. This only seems
2154 * to be required with the PCIe devices.
2155 */
2156 if (sc->re_ldata.re_tx_free < sc->re_tx_desc_cnt)
2157 CSR_WRITE_1(sc, sc->re_txstart, RE_TXSTART_START);
2158 else
2159 ifp->if_timer = 0;
2160
2161 return tx;
2162 }
2163
2164 static void
2165 re_tick(void *xsc)
2166 {
2167 struct re_softc *sc = xsc;
2168
2169 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
2170 re_tick_serialized(xsc);
2171 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
2172 }
2173
2174 static void
2175 re_tick_serialized(void *xsc)
2176 {
2177 struct re_softc *sc = xsc;
2178 struct ifnet *ifp = &sc->arpcom.ac_if;
2179 struct mii_data *mii;
2180
2181 ASSERT_SERIALIZED(ifp->if_serializer);
2182
2183 mii = device_get_softc(sc->re_miibus);
2184 mii_tick(mii);
2185 if (sc->re_flags & RE_F_LINKED) {
2186 if (!(mii->mii_media_status & IFM_ACTIVE))
2187 sc->re_flags &= ~RE_F_LINKED;
2188 } else {
2189 if (mii->mii_media_status & IFM_ACTIVE &&
2190 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
2191 sc->re_flags |= RE_F_LINKED;
2192 if (!ifq_is_empty(&ifp->if_snd))
2193 if_devstart(ifp);
2194 }
2195 }
2196
2197 callout_reset(&sc->re_timer, hz, re_tick, sc);
2198 }
2199
2200 #ifdef IFPOLL_ENABLE
2201
2202 static void
2203 re_npoll_compat(struct ifnet *ifp, void *arg __unused, int count)
2204 {
2205 struct re_softc *sc = ifp->if_softc;
2206
2207 ASSERT_SERIALIZED(ifp->if_serializer);
2208
2209 if (sc->re_npoll.ifpc_stcount-- == 0) {
2210 uint16_t status;
2211
2212 sc->re_npoll.ifpc_stcount = sc->re_npoll.ifpc_stfrac;
2213
2214 status = CSR_READ_2(sc, RE_ISR);
2215 if (status == 0xffff)
2216 return;
2217 if (status)
2218 CSR_WRITE_2(sc, RE_ISR, status);
2219
2220 /*
2221 * XXX check behaviour on receiver stalls.
2222 */
2223
2224 if (status & RE_ISR_SYSTEM_ERR)
2225 re_init(sc);
2226 }
2227
2228 sc->rxcycles = count;
2229 re_rxeof(sc);
2230 re_txeof(sc);
2231
2232 if (!ifq_is_empty(&ifp->if_snd))
2233 if_devstart(ifp);
2234 }
2235
2236 static void
2237 re_npoll(struct ifnet *ifp, struct ifpoll_info *info)
2238 {
2239 struct re_softc *sc = ifp->if_softc;
2240
2241 ASSERT_SERIALIZED(ifp->if_serializer);
2242
2243 if (info != NULL) {
2244 int cpuid = sc->re_npoll.ifpc_cpuid;
2245
2246 info->ifpi_rx[cpuid].poll_func = re_npoll_compat;
2247 info->ifpi_rx[cpuid].arg = NULL;
2248 info->ifpi_rx[cpuid].serializer = ifp->if_serializer;
2249
2250 if (ifp->if_flags & IFF_RUNNING)
2251 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
2252 ifq_set_cpuid(&ifp->if_snd, cpuid);
2253 } else {
2254 if (ifp->if_flags & IFF_RUNNING)
2255 re_setup_intr(sc, 1, sc->re_imtype);
2256 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->re_irq));
2257 }
2258 }
2259 #endif /* IFPOLL_ENABLE */
2260
2261 static void
2262 re_intr(void *arg)
2263 {
2264 struct re_softc *sc = arg;
2265 struct ifnet *ifp = &sc->arpcom.ac_if;
2266 uint16_t status;
2267 int rx, tx;
2268
2269 ASSERT_SERIALIZED(ifp->if_serializer);
2270
2271 if ((sc->re_flags & RE_F_SUSPENDED) ||
2272 (ifp->if_flags & IFF_RUNNING) == 0)
2273 return;
2274
2275 rx = tx = 0;
2276
2277 status = CSR_READ_2(sc, RE_ISR);
2278 /* If the card has gone away the read returns 0xffff. */
2279 if (status == 0xffff)
2280 goto reload;
2281 if (status)
2282 CSR_WRITE_2(sc, RE_ISR, status);
2283
2284 if ((status & sc->re_intrs) == 0)
2285 goto reload;
2286
2287 if (status & (sc->re_rx_ack | RE_ISR_RX_ERR))
2288 rx |= re_rxeof(sc);
2289
2290 if (status & (sc->re_tx_ack | RE_ISR_TX_ERR))
2291 tx |= re_txeof(sc);
2292
2293 if (status & RE_ISR_SYSTEM_ERR)
2294 re_init(sc);
2295
2296 if (status & RE_ISR_LINKCHG) {
2297 callout_stop(&sc->re_timer);
2298 re_tick_serialized(sc);
2299 }
2300
2301 reload:
2302 if (sc->re_imtype == RE_IMTYPE_SIM) {
2303 if ((sc->re_flags & RE_F_TIMER_INTR)) {
2304 if ((tx | rx) == 0) {
2305 /*
2306 * Nothing needs to be processed, fallback
2307 * to use TX/RX interrupts.
2308 */
2309 re_setup_intr(sc, 1, RE_IMTYPE_NONE);
2310
2311 /*
2312 * Recollect, mainly to avoid the possible
2313 * race introduced by changing interrupt
2314 * masks.
2315 */
2316 re_rxeof(sc);
2317 tx = re_txeof(sc);
2318 } else {
2319 CSR_WRITE_4(sc, RE_TIMERCNT, 1); /* reload */
2320 }
2321 } else if (tx | rx) {
2322 /*
2323 * Assume that using simulated interrupt moderation
2324 * (hardware timer based) could reduce the interript
2325 * rate.
2326 */
2327 re_setup_intr(sc, 1, RE_IMTYPE_SIM);
2328 }
2329 }
2330
2331 if (tx && !ifq_is_empty(&ifp->if_snd))
2332 if_devstart(ifp);
2333 }
2334
2335 static int
2336 re_encap(struct re_softc *sc, struct mbuf **m_head, int *idx0)
2337 {
2338 struct mbuf *m = *m_head;
2339 bus_dma_segment_t segs[RE_MAXSEGS];
2340 bus_dmamap_t map;
2341 int error, maxsegs, idx, i, nsegs;
2342 struct re_desc *d, *tx_ring;
2343 uint32_t cmd_csum, ctl_csum, vlantag;
2344
2345 KASSERT(sc->re_ldata.re_tx_free > RE_TXDESC_SPARE,
2346 ("not enough free TX desc"));
2347
2348 map = sc->re_ldata.re_tx_dmamap[*idx0];
2349
2350 /*
2351 * Set up checksum offload. Note: checksum offload bits must
2352 * appear in all descriptors of a multi-descriptor transmit
2353 * attempt. (This is according to testing done with an 8169
2354 * chip. I'm not sure if this is a requirement or a bug.)
2355 */
2356 cmd_csum = ctl_csum = 0;
2357 if (m->m_pkthdr.csum_flags & CSUM_IP) {
2358 cmd_csum |= RE_TDESC_CMD_IPCSUM;
2359 ctl_csum |= RE_TDESC_CTL_IPCSUM;
2360 }
2361 if (m->m_pkthdr.csum_flags & CSUM_TCP) {
2362 cmd_csum |= RE_TDESC_CMD_TCPCSUM;
2363 ctl_csum |= RE_TDESC_CTL_TCPCSUM;
2364 }
2365 if (m->m_pkthdr.csum_flags & CSUM_UDP) {
2366 cmd_csum |= RE_TDESC_CMD_UDPCSUM;
2367 ctl_csum |= RE_TDESC_CTL_UDPCSUM;
2368 }
2369
2370 /* For MAC2 chips, csum flags are set on re_control */
2371 if (sc->re_caps & RE_C_MAC2)
2372 cmd_csum = 0;
2373 else
2374 ctl_csum = 0;
2375
2376 if ((sc->re_caps & RE_C_AUTOPAD) == 0) {
2377 /*
2378 * With some of the RealTek chips, using the checksum offload
2379 * support in conjunction with the autopadding feature results
2380 * in the transmission of corrupt frames. For example, if we
2381 * need to send a really small IP fragment that's less than 60
2382 * bytes in size, and IP header checksumming is enabled, the
2383 * resulting ethernet frame that appears on the wire will
2384 * have garbled payload. To work around this, if TX checksum
2385 * offload is enabled, we always manually pad short frames out
2386 * to the minimum ethernet frame size.
2387 *
2388 * Note: this appears unnecessary for TCP, and doing it for TCP
2389 * with PCIe adapters seems to result in bad checksums.
2390 */
2391 if ((m->m_pkthdr.csum_flags &
2392 (CSUM_DELAY_IP | CSUM_DELAY_DATA)) &&
2393 (m->m_pkthdr.csum_flags & CSUM_TCP) == 0 &&
2394 m->m_pkthdr.len < RE_MIN_FRAMELEN) {
2395 error = m_devpad(m, RE_MIN_FRAMELEN);
2396 if (error)
2397 goto back;
2398 }
2399 }
2400
2401 vlantag = 0;
2402 if (m->m_flags & M_VLANTAG) {
2403 vlantag = htobe16(m->m_pkthdr.ether_vlantag) |
2404 RE_TDESC_CTL_INSTAG;
2405 }
2406
2407 maxsegs = sc->re_ldata.re_tx_free;
2408 if (maxsegs > RE_MAXSEGS)
2409 maxsegs = RE_MAXSEGS;
2410
2411 error = bus_dmamap_load_mbuf_defrag(sc->re_ldata.re_tx_mtag, map,
2412 m_head, segs, maxsegs, &nsegs, BUS_DMA_NOWAIT);
2413 if (error)
2414 goto back;
2415
2416 m = *m_head;
2417 bus_dmamap_sync(sc->re_ldata.re_tx_mtag, map, BUS_DMASYNC_PREWRITE);
2418
2419 /*
2420 * Map the segment array into descriptors. We also keep track
2421 * of the end of the ring and set the end-of-ring bits as needed,
2422 * and we set the ownership bits in all except the very first
2423 * descriptor, whose ownership bits will be turned on later.
2424 */
2425 tx_ring = sc->re_ldata.re_tx_list;
2426 idx = *idx0;
2427 i = 0;
2428 for (;;) {
2429 uint32_t cmdstat;
2430
2431 d = &tx_ring[idx];
2432
2433 cmdstat = segs[i].ds_len;
2434 d->re_bufaddr_lo = htole32(RE_ADDR_LO(segs[i].ds_addr));
2435 d->re_bufaddr_hi = htole32(RE_ADDR_HI(segs[i].ds_addr));
2436 if (i == 0)
2437 cmdstat |= RE_TDESC_CMD_SOF;
2438 else
2439 cmdstat |= RE_TDESC_CMD_OWN;
2440 if (idx == (sc->re_tx_desc_cnt - 1))
2441 cmdstat |= RE_TDESC_CMD_EOR;
2442 d->re_cmdstat = htole32(cmdstat | cmd_csum);
2443 d->re_control = htole32(ctl_csum | vlantag);
2444
2445 i++;
2446 if (i == nsegs)
2447 break;
2448 RE_TXDESC_INC(sc, idx);
2449 }
2450 d->re_cmdstat |= htole32(RE_TDESC_CMD_EOF);
2451
2452 /* Transfer ownership of packet to the chip. */
2453 d->re_cmdstat |= htole32(RE_TDESC_CMD_OWN);
2454 if (*idx0 != idx)
2455 tx_ring[*idx0].re_cmdstat |= htole32(RE_TDESC_CMD_OWN);
2456
2457 /*
2458 * Insure that the map for this transmission
2459 * is placed at the array index of the last descriptor
2460 * in this chain.
2461 */
2462 sc->re_ldata.re_tx_dmamap[*idx0] = sc->re_ldata.re_tx_dmamap[idx];
2463 sc->re_ldata.re_tx_dmamap[idx] = map;
2464
2465 sc->re_ldata.re_tx_mbuf[idx] = m;
2466 sc->re_ldata.re_tx_free -= nsegs;
2467
2468 RE_TXDESC_INC(sc, idx);
2469 *idx0 = idx;
2470 back:
2471 if (error) {
2472 m_freem(*m_head);
2473 *m_head = NULL;
2474 }
2475 return error;
2476 }
2477
2478 /*
2479 * Main transmit routine for C+ and gigE NICs.
2480 */
2481
2482 static void
2483 re_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
2484 {
2485 struct re_softc *sc = ifp->if_softc;
2486 struct mbuf *m_head;
2487 int idx, need_trans, oactive, error;
2488
2489 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
2490 ASSERT_SERIALIZED(ifp->if_serializer);
2491
2492 if ((sc->re_flags & RE_F_LINKED) == 0) {
2493 ifq_purge(&ifp->if_snd);
2494 return;
2495 }
2496
2497 if ((ifp->if_flags & IFF_RUNNING) == 0 || ifq_is_oactive(&ifp->if_snd))
2498 return;
2499
2500 idx = sc->re_ldata.re_tx_prodidx;
2501
2502 need_trans = 0;
2503 oactive = 0;
2504 while (sc->re_ldata.re_tx_mbuf[idx] == NULL) {
2505 if (sc->re_ldata.re_tx_free <= RE_TXDESC_SPARE) {
2506 if (!oactive) {
2507 if (re_tx_collect(sc)) {
2508 oactive = 1;
2509 continue;
2510 }
2511 }
2512 ifq_set_oactive(&ifp->if_snd);
2513 break;
2514 }
2515
2516 m_head = ifq_dequeue(&ifp->if_snd);
2517 if (m_head == NULL)
2518 break;
2519
2520 error = re_encap(sc, &m_head, &idx);
2521 if (error) {
2522 /* m_head is freed by re_encap(), if we reach here */
2523 IFNET_STAT_INC(ifp, oerrors, 1);
2524
2525 if (error == EFBIG && !oactive) {
2526 if (re_tx_collect(sc)) {
2527 oactive = 1;
2528 continue;
2529 }
2530 }
2531 ifq_set_oactive(&ifp->if_snd);
2532 break;
2533 }
2534
2535 oactive = 0;
2536 need_trans = 1;
2537
2538 /*
2539 * If there's a BPF listener, bounce a copy of this frame
2540 * to him.
2541 */
2542 ETHER_BPF_MTAP(ifp, m_head);
2543 }
2544
2545 /*
2546 * If sc->re_ldata.re_tx_mbuf[idx] is not NULL it is possible
2547 * for OACTIVE to not be properly set when we also do not
2548 * have sufficient free tx descriptors, leaving packet in
2549 * ifp->if_snd. This can cause if_start_dispatch() to loop
2550 * infinitely so make sure OACTIVE is set properly.
2551 */
2552 if (sc->re_ldata.re_tx_free <= RE_TXDESC_SPARE) {
2553 if (!ifq_is_oactive(&ifp->if_snd)) {
2554 if_printf(ifp, "Debug: OACTIVE was not set when "
2555 "re_tx_free was below minimum!\n");
2556 ifq_set_oactive(&ifp->if_snd);
2557 }
2558 }
2559 if (!need_trans)
2560 return;
2561
2562 sc->re_ldata.re_tx_prodidx = idx;
2563
2564 /*
2565 * RealTek put the TX poll request register in a different
2566 * location on the 8169 gigE chip. I don't know why.
2567 */
2568 CSR_WRITE_1(sc, sc->re_txstart, RE_TXSTART_START);
2569
2570 /*
2571 * Set a timeout in case the chip goes out to lunch.
2572 */
2573 ifp->if_timer = 5;
2574 }
2575
2576 static void
2577 re_init(void *xsc)
2578 {
2579 struct re_softc *sc = xsc;
2580 struct ifnet *ifp = &sc->arpcom.ac_if;
2581 struct mii_data *mii;
2582 int error, framelen;
2583
2584 ASSERT_SERIALIZED(ifp->if_serializer);
2585
2586 mii = device_get_softc(sc->re_miibus);
2587
2588 /*
2589 * Cancel pending I/O and free all RX/TX buffers.
2590 */
2591 re_stop(sc);
2592
2593 if (sc->re_caps & RE_C_CONTIGRX) {
2594 if (ifp->if_mtu > ETHERMTU) {
2595 KKASSERT(sc->re_ldata.re_jbuf != NULL);
2596 sc->re_flags |= RE_F_USE_JPOOL;
2597 sc->re_rxbuf_size = RE_FRAMELEN_MAX;
2598 sc->re_newbuf = re_newbuf_jumbo;
2599 } else {
2600 sc->re_flags &= ~RE_F_USE_JPOOL;
2601 sc->re_rxbuf_size = MCLBYTES;
2602 sc->re_newbuf = re_newbuf_std;
2603 }
2604 }
2605
2606 /*
2607 * Adjust max read request size according to MTU; mainly to
2608 * improve TX performance for common case (ETHERMTU) on GigE
2609 * NICs. However, this could _not_ be done on 10/100 only
2610 * NICs; their DMA engines will malfunction using non-default
2611 * max read request size.
2612 */
2613 if ((sc->re_caps & (RE_C_PCIE | RE_C_FASTE)) == RE_C_PCIE) {
2614 if (ifp->if_mtu > ETHERMTU) {
2615 /*
2616 * 512 seems to be the only value that works
2617 * reliably with jumbo frame
2618 */
2619 pcie_set_max_readrq(sc->re_dev,
2620 PCIEM_DEVCTL_MAX_READRQ_512);
2621 } else {
2622 pcie_set_max_readrq(sc->re_dev,
2623 PCIEM_DEVCTL_MAX_READRQ_4096);
2624 }
2625 }
2626
2627 /*
2628 * Enable C+ RX and TX mode, as well as VLAN stripping and
2629 * RX checksum offload. We must configure the C+ register
2630 * before all others.
2631 */
2632 CSR_WRITE_2(sc, RE_CPLUS_CMD, RE_CPLUSCMD_RXENB | RE_CPLUSCMD_TXENB |
2633 RE_CPLUSCMD_PCI_MRW |
2634 (ifp->if_capenable & IFCAP_VLAN_HWTAGGING ?
2635 RE_CPLUSCMD_VLANSTRIP : 0) |
2636 (ifp->if_capenable & IFCAP_RXCSUM ?
2637 RE_CPLUSCMD_RXCSUM_ENB : 0));
2638
2639 /*
2640 * Init our MAC address. Even though the chipset
2641 * documentation doesn't mention it, we need to enter "Config
2642 * register write enable" mode to modify the ID registers.
2643 */
2644 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_WRITECFG);
2645 CSR_WRITE_4(sc, RE_IDR0,
2646 htole32(*(uint32_t *)(&sc->arpcom.ac_enaddr[0])));
2647 CSR_WRITE_2(sc, RE_IDR4,
2648 htole16(*(uint16_t *)(&sc->arpcom.ac_enaddr[4])));
2649 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_OFF);
2650
2651 /*
2652 * For C+ mode, initialize the RX descriptors and mbufs.
2653 */
2654 error = re_rx_list_init(sc);
2655 if (error) {
2656 re_stop(sc);
2657 return;
2658 }
2659 error = re_tx_list_init(sc);
2660 if (error) {
2661 re_stop(sc);
2662 return;
2663 }
2664
2665 /*
2666 * Load the addresses of the RX and TX lists into the chip.
2667 */
2668 CSR_WRITE_4(sc, RE_RXLIST_ADDR_HI,
2669 RE_ADDR_HI(sc->re_ldata.re_rx_list_addr));
2670 CSR_WRITE_4(sc, RE_RXLIST_ADDR_LO,
2671 RE_ADDR_LO(sc->re_ldata.re_rx_list_addr));
2672
2673 CSR_WRITE_4(sc, RE_TXLIST_ADDR_HI,
2674 RE_ADDR_HI(sc->re_ldata.re_tx_list_addr));
2675 CSR_WRITE_4(sc, RE_TXLIST_ADDR_LO,
2676 RE_ADDR_LO(sc->re_ldata.re_tx_list_addr));
2677
2678 /*
2679 * Enable transmit and receive.
2680 */
2681 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB);
2682
2683 /*
2684 * Set the initial TX and RX configuration.
2685 */
2686 if (sc->re_flags & RE_F_TESTMODE) {
2687 if (!RE_IS_8139CP(sc))
2688 CSR_WRITE_4(sc, RE_TXCFG,
2689 RE_TXCFG_CONFIG | RE_LOOPTEST_ON);
2690 else
2691 CSR_WRITE_4(sc, RE_TXCFG,
2692 RE_TXCFG_CONFIG | RE_LOOPTEST_ON_CPLUS);
2693 } else
2694 CSR_WRITE_4(sc, RE_TXCFG, RE_TXCFG_CONFIG);
2695
2696 framelen = RE_FRAMELEN(ifp->if_mtu);
2697 if (framelen < MCLBYTES)
2698 CSR_WRITE_1(sc, RE_EARLY_TX_THRESH, howmany(MCLBYTES, 128));
2699 else
2700 CSR_WRITE_1(sc, RE_EARLY_TX_THRESH, howmany(framelen, 128));
2701
2702 CSR_WRITE_4(sc, RE_RXCFG, RE_RXCFG_CONFIG);
2703
2704 /*
2705 * Program the multicast filter, if necessary.
2706 */
2707 re_setmulti(sc);
2708
2709 #ifdef IFPOLL_ENABLE
2710 /*
2711 * Disable interrupts if we are polling.
2712 */
2713 if (ifp->if_flags & IFF_NPOLLING)
2714 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
2715 else /* otherwise ... */
2716 #endif /* IFPOLL_ENABLE */
2717 /*
2718 * Enable interrupts.
2719 */
2720 if (sc->re_flags & RE_F_TESTMODE)
2721 CSR_WRITE_2(sc, RE_IMR, 0);
2722 else
2723 re_setup_intr(sc, 1, sc->re_imtype);
2724 CSR_WRITE_2(sc, RE_ISR, sc->re_intrs);
2725
2726 /* Start RX/TX process. */
2727 CSR_WRITE_4(sc, RE_MISSEDPKT, 0);
2728
2729 #ifdef notdef
2730 /* Enable receiver and transmitter. */
2731 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB);
2732 #endif
2733
2734 /*
2735 * For 8169 gigE NICs, set the max allowed RX packet
2736 * size so we can receive jumbo frames.
2737 */
2738 if (!RE_IS_8139CP(sc)) {
2739 if (sc->re_caps & RE_C_CONTIGRX)
2740 CSR_WRITE_2(sc, RE_MAXRXPKTLEN, sc->re_rxbuf_size);
2741 else
2742 CSR_WRITE_2(sc, RE_MAXRXPKTLEN, 16383);
2743 }
2744
2745 if (sc->re_flags & RE_F_TESTMODE)
2746 return;
2747
2748 mii_mediachg(mii);
2749
2750 CSR_WRITE_1(sc, RE_CFG1, RE_CFG1_DRVLOAD|RE_CFG1_FULLDUPLEX);
2751
2752 ifp->if_flags |= IFF_RUNNING;
2753 ifq_clr_oactive(&ifp->if_snd);
2754
2755 callout_reset(&sc->re_timer, hz, re_tick, sc);
2756 }
2757
2758 /*
2759 * Set media options.
2760 */
2761 static int
2762 re_ifmedia_upd(struct ifnet *ifp)
2763 {
2764 struct re_softc *sc = ifp->if_softc;
2765 struct mii_data *mii;
2766
2767 ASSERT_SERIALIZED(ifp->if_serializer);
2768
2769 mii = device_get_softc(sc->re_miibus);
2770 mii_mediachg(mii);
2771
2772 return(0);
2773 }
2774
2775 /*
2776 * Report current media status.
2777 */
2778 static void
2779 re_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
2780 {
2781 struct re_softc *sc = ifp->if_softc;
2782 struct mii_data *mii;
2783
2784 ASSERT_SERIALIZED(ifp->if_serializer);
2785
2786 mii = device_get_softc(sc->re_miibus);
2787
2788 mii_pollstat(mii);
2789 ifmr->ifm_active = mii->mii_media_active;
2790 ifmr->ifm_status = mii->mii_media_status;
2791 }
2792
2793 static int
2794 re_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
2795 {
2796 struct re_softc *sc = ifp->if_softc;
2797 struct ifreq *ifr = (struct ifreq *) data;
2798 struct mii_data *mii;
2799 int error = 0, mask;
2800
2801 ASSERT_SERIALIZED(ifp->if_serializer);
2802
2803 switch(command) {
2804 case SIOCSIFMTU:
2805 if (ifr->ifr_mtu > sc->re_maxmtu) {
2806 error = EINVAL;
2807 } else if (ifp->if_mtu != ifr->ifr_mtu) {
2808 ifp->if_mtu = ifr->ifr_mtu;
2809 if (ifp->if_flags & IFF_RUNNING)
2810 ifp->if_init(sc);
2811 }
2812 break;
2813
2814 case SIOCSIFFLAGS:
2815 if (ifp->if_flags & IFF_UP) {
2816 if (ifp->if_flags & IFF_RUNNING) {
2817 if ((ifp->if_flags ^ sc->re_if_flags) &
2818 (IFF_PROMISC | IFF_ALLMULTI))
2819 re_setmulti(sc);
2820 } else {
2821 re_init(sc);
2822 }
2823 } else if (ifp->if_flags & IFF_RUNNING) {
2824 re_stop(sc);
2825 }
2826 sc->re_if_flags = ifp->if_flags;
2827 break;
2828
2829 case SIOCADDMULTI:
2830 case SIOCDELMULTI:
2831 re_setmulti(sc);
2832 break;
2833
2834 case SIOCGIFMEDIA:
2835 case SIOCSIFMEDIA:
2836 mii = device_get_softc(sc->re_miibus);
2837 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
2838 break;
2839
2840 case SIOCSIFCAP:
2841 mask = (ifr->ifr_reqcap ^ ifp->if_capenable) &
2842 ifp->if_capabilities;
2843 ifp->if_capenable ^= mask;
2844
2845 if (mask & IFCAP_HWCSUM) {
2846 if (ifp->if_capenable & IFCAP_TXCSUM)
2847 ifp->if_hwassist = sc->re_hwassist;
2848 else
2849 ifp->if_hwassist = 0;
2850 }
2851 if (mask && (ifp->if_flags & IFF_RUNNING))
2852 re_init(sc);
2853 break;
2854
2855 default:
2856 error = ether_ioctl(ifp, command, data);
2857 break;
2858 }
2859 return(error);
2860 }
2861
2862 static void
2863 re_watchdog(struct ifnet *ifp)
2864 {
2865 struct re_softc *sc = ifp->if_softc;
2866
2867 ASSERT_SERIALIZED(ifp->if_serializer);
2868
2869 if_printf(ifp, "watchdog timeout\n");
2870
2871 IFNET_STAT_INC(ifp, oerrors, 1);
2872
2873 re_txeof(sc);
2874 re_rxeof(sc);
2875
2876 re_init(sc);
2877
2878 if (!ifq_is_empty(&ifp->if_snd))
2879 if_devstart(ifp);
2880 }
2881
2882 /*
2883 * Stop the adapter and free any mbufs allocated to the
2884 * RX and TX lists.
2885 */
2886 static void
2887 re_stop(struct re_softc *sc)
2888 {
2889 struct ifnet *ifp = &sc->arpcom.ac_if;
2890 int i;
2891
2892 ASSERT_SERIALIZED(ifp->if_serializer);
2893
2894 /* Reset the adapter. */
2895 re_reset(sc, ifp->if_flags & IFF_RUNNING);
2896
2897 ifp->if_timer = 0;
2898 callout_stop(&sc->re_timer);
2899
2900 ifp->if_flags &= ~IFF_RUNNING;
2901 ifq_clr_oactive(&ifp->if_snd);
2902 sc->re_flags &= ~(RE_F_TIMER_INTR | RE_F_DROP_RXFRAG | RE_F_LINKED);
2903
2904 CSR_WRITE_1(sc, RE_COMMAND, 0x00);
2905 CSR_WRITE_2(sc, RE_IMR, 0x0000);
2906 CSR_WRITE_2(sc, RE_ISR, 0xFFFF);
2907
2908 re_free_rxchain(sc);
2909
2910 /* Free the TX list buffers. */
2911 for (i = 0; i < sc->re_tx_desc_cnt; i++) {
2912 if (sc->re_ldata.re_tx_mbuf[i] != NULL) {
2913 bus_dmamap_unload(sc->re_ldata.re_tx_mtag,
2914 sc->re_ldata.re_tx_dmamap[i]);
2915 m_freem(sc->re_ldata.re_tx_mbuf[i]);
2916 sc->re_ldata.re_tx_mbuf[i] = NULL;
2917 }
2918 }
2919
2920 /* Free the RX list buffers. */
2921 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
2922 if (sc->re_ldata.re_rx_mbuf[i] != NULL) {
2923 if ((sc->re_flags & RE_F_USE_JPOOL) == 0) {
2924 bus_dmamap_unload(sc->re_ldata.re_rx_mtag,
2925 sc->re_ldata.re_rx_dmamap[i]);
2926 }
2927 m_freem(sc->re_ldata.re_rx_mbuf[i]);
2928 sc->re_ldata.re_rx_mbuf[i] = NULL;
2929 }
2930 }
2931 }
2932
2933 /*
2934 * Device suspend routine. Stop the interface and save some PCI
2935 * settings in case the BIOS doesn't restore them properly on
2936 * resume.
2937 */
2938 static int
2939 re_suspend(device_t dev)
2940 {
2941 #ifndef BURN_BRIDGES
2942 int i;
2943 #endif
2944 struct re_softc *sc = device_get_softc(dev);
2945 struct ifnet *ifp = &sc->arpcom.ac_if;
2946
2947 lwkt_serialize_enter(ifp->if_serializer);
2948
2949 re_stop(sc);
2950
2951 #ifndef BURN_BRIDGES
2952 for (i = 0; i < 5; i++)
2953 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i * 4, 4);
2954 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
2955 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
2956 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
2957 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
2958 #endif
2959
2960 sc->re_flags |= RE_F_SUSPENDED;
2961
2962 lwkt_serialize_exit(ifp->if_serializer);
2963
2964 return (0);
2965 }
2966
2967 /*
2968 * Device resume routine. Restore some PCI settings in case the BIOS
2969 * doesn't, re-enable busmastering, and restart the interface if
2970 * appropriate.
2971 */
2972 static int
2973 re_resume(device_t dev)
2974 {
2975 struct re_softc *sc = device_get_softc(dev);
2976 struct ifnet *ifp = &sc->arpcom.ac_if;
2977 #ifndef BURN_BRIDGES
2978 int i;
2979 #endif
2980
2981 lwkt_serialize_enter(ifp->if_serializer);
2982
2983 #ifndef BURN_BRIDGES
2984 /* better way to do this? */
2985 for (i = 0; i < 5; i++)
2986 pci_write_config(dev, PCIR_MAPS + i * 4, sc->saved_maps[i], 4);
2987 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
2988 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
2989 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
2990 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
2991
2992 /* reenable busmastering */
2993 pci_enable_busmaster(dev);
2994 pci_enable_io(dev, SYS_RES_IOPORT);
2995 #endif
2996
2997 /* reinitialize interface if necessary */
2998 if (ifp->if_flags & IFF_UP)
2999 re_init(sc);
3000
3001 sc->re_flags &= ~RE_F_SUSPENDED;
3002
3003 lwkt_serialize_exit(ifp->if_serializer);
3004
3005 return (0);
3006 }
3007
3008 /*
3009 * Stop all chip I/O so that the kernel's probe routines don't
3010 * get confused by errant DMAs when rebooting.
3011 */
3012 static void
3013 re_shutdown(device_t dev)
3014 {
3015 struct re_softc *sc = device_get_softc(dev);
3016 struct ifnet *ifp = &sc->arpcom.ac_if;
3017
3018 lwkt_serialize_enter(ifp->if_serializer);
3019 re_stop(sc);
3020 lwkt_serialize_exit(ifp->if_serializer);
3021 }
3022
3023 static int
3024 re_sysctl_rxtime(SYSCTL_HANDLER_ARGS)
3025 {
3026 struct re_softc *sc = arg1;
3027
3028 return re_sysctl_hwtime(oidp, arg1, arg2, req, &sc->re_rx_time);
3029 }
3030
3031 static int
3032 re_sysctl_txtime(SYSCTL_HANDLER_ARGS)
3033 {
3034 struct re_softc *sc = arg1;
3035
3036 return re_sysctl_hwtime(oidp, arg1, arg2, req, &sc->re_tx_time);
3037 }
3038
3039 static int
3040 re_sysctl_hwtime(SYSCTL_HANDLER_ARGS, int *hwtime)
3041 {
3042 struct re_softc *sc = arg1;
3043 struct ifnet *ifp = &sc->arpcom.ac_if;
3044 int error, v;
3045
3046 lwkt_serialize_enter(ifp->if_serializer);
3047
3048 v = *hwtime;
3049 error = sysctl_handle_int(oidp, &v, 0, req);
3050 if (error || req->newptr == NULL)
3051 goto back;
3052
3053 if (v <= 0) {
3054 error = EINVAL;
3055 goto back;
3056 }
3057
3058 if (v != *hwtime) {
3059 *hwtime = v;
3060
3061 if ((ifp->if_flags & (IFF_RUNNING | IFF_NPOLLING)) ==
3062 IFF_RUNNING && sc->re_imtype == RE_IMTYPE_HW)
3063 re_setup_hw_im(sc);
3064 }
3065 back:
3066 lwkt_serialize_exit(ifp->if_serializer);
3067 return error;
3068 }
3069
3070 static int
3071 re_sysctl_simtime(SYSCTL_HANDLER_ARGS)
3072 {
3073 struct re_softc *sc = arg1;
3074 struct ifnet *ifp = &sc->arpcom.ac_if;
3075 int error, v;
3076
3077 lwkt_serialize_enter(ifp->if_serializer);
3078
3079 v = sc->re_sim_time;
3080 error = sysctl_handle_int(oidp, &v, 0, req);
3081 if (error || req->newptr == NULL)
3082 goto back;
3083
3084 if (v <= 0) {
3085 error = EINVAL;
3086 goto back;
3087 }
3088
3089 if (v != sc->re_sim_time) {
3090 sc->re_sim_time = v;
3091
3092 if ((ifp->if_flags & (IFF_RUNNING | IFF_NPOLLING)) ==
3093 IFF_RUNNING && sc->re_imtype == RE_IMTYPE_SIM) {
3094 #ifdef foo
3095 int reg;
3096
3097 /*
3098 * Following code causes various strange
3099 * performance problems. Hmm ...
3100 */
3101 CSR_WRITE_2(sc, RE_IMR, 0);
3102 if (!RE_IS_8139CP(sc))
3103 reg = RE_TIMERINT_8169;
3104 else
3105 reg = RE_TIMERINT;
3106 CSR_WRITE_4(sc, reg, 0);
3107 CSR_READ_4(sc, reg); /* flush */
3108
3109 CSR_WRITE_2(sc, RE_IMR, sc->re_intrs);
3110 re_setup_sim_im(sc);
3111 #else
3112 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
3113 DELAY(10);
3114 re_setup_intr(sc, 1, RE_IMTYPE_SIM);
3115 #endif
3116 }
3117 }
3118 back:
3119 lwkt_serialize_exit(ifp->if_serializer);
3120 return error;
3121 }
3122
3123 static int
3124 re_sysctl_imtype(SYSCTL_HANDLER_ARGS)
3125 {
3126 struct re_softc *sc = arg1;
3127 struct ifnet *ifp = &sc->arpcom.ac_if;
3128 int error, v;
3129
3130 lwkt_serialize_enter(ifp->if_serializer);
3131
3132 v = sc->re_imtype;
3133 error = sysctl_handle_int(oidp, &v, 0, req);
3134 if (error || req->newptr == NULL)
3135 goto back;
3136
3137 if (v != RE_IMTYPE_HW && v != RE_IMTYPE_SIM && v != RE_IMTYPE_NONE) {
3138 error = EINVAL;
3139 goto back;
3140 }
3141 if (v == RE_IMTYPE_HW && (sc->re_caps & RE_C_HWIM) == 0) {
3142 /* Can't do hardware interrupt moderation */
3143 error = EOPNOTSUPP;
3144 goto back;
3145 }
3146
3147 if (v != sc->re_imtype) {
3148 sc->re_imtype = v;
3149 if ((ifp->if_flags & (IFF_RUNNING | IFF_NPOLLING)) ==
3150 IFF_RUNNING)
3151 re_setup_intr(sc, 1, sc->re_imtype);
3152 }
3153 back:
3154 lwkt_serialize_exit(ifp->if_serializer);
3155 return error;
3156 }
3157
3158 static void
3159 re_setup_hw_im(struct re_softc *sc)
3160 {
3161 KKASSERT(sc->re_caps & RE_C_HWIM);
3162
3163 /*
3164 * Interrupt moderation
3165 *
3166 * 0xABCD
3167 * A - unknown (maybe TX related)
3168 * B - TX timer (unit: 25us)
3169 * C - unknown (maybe RX related)
3170 * D - RX timer (unit: 25us)
3171 *
3172 *
3173 * re(4)'s interrupt moderation is actually controlled by
3174 * two variables, like most other NICs (bge, bce etc.)
3175 * o timer
3176 * o number of packets [P]
3177 *
3178 * The logic relationship between these two variables is
3179 * similar to other NICs too:
3180 * if (timer expire || packets > [P])
3181 * Interrupt is delivered
3182 *
3183 * Currently we only know how to set 'timer', but not
3184 * 'number of packets', which should be ~30, as far as I
3185 * tested (sink ~900Kpps, interrupt rate is 30KHz)
3186 */
3187 CSR_WRITE_2(sc, RE_IM,
3188 RE_IM_RXTIME(sc->re_rx_time) |
3189 RE_IM_TXTIME(sc->re_tx_time) |
3190 RE_IM_MAGIC);
3191 }
3192
3193 static void
3194 re_disable_hw_im(struct re_softc *sc)
3195 {
3196 if (sc->re_caps & RE_C_HWIM)
3197 CSR_WRITE_2(sc, RE_IM, 0);
3198 }
3199
3200 static void
3201 re_setup_sim_im(struct re_softc *sc)
3202 {
3203 if (!RE_IS_8139CP(sc)) {
3204 uint32_t ticks;
3205
3206 /*
3207 * Datasheet says tick decreases at bus speed,
3208 * but it seems the clock runs a little bit
3209 * faster, so we do some compensation here.
3210 */
3211 ticks = (sc->re_sim_time * sc->re_bus_speed * 8) / 5;
3212 CSR_WRITE_4(sc, RE_TIMERINT_8169, ticks);
3213 } else {
3214 CSR_WRITE_4(sc, RE_TIMERINT, 0x400); /* XXX */
3215 }
3216 CSR_WRITE_4(sc, RE_TIMERCNT, 1); /* reload */
3217 sc->re_flags |= RE_F_TIMER_INTR;
3218 }
3219
3220 static void
3221 re_disable_sim_im(struct re_softc *sc)
3222 {
3223 if (!RE_IS_8139CP(sc))
3224 CSR_WRITE_4(sc, RE_TIMERINT_8169, 0);
3225 else
3226 CSR_WRITE_4(sc, RE_TIMERINT, 0);
3227 sc->re_flags &= ~RE_F_TIMER_INTR;
3228 }
3229
3230 static void
3231 re_config_imtype(struct re_softc *sc, int imtype)
3232 {
3233 switch (imtype) {
3234 case RE_IMTYPE_HW:
3235 KKASSERT(sc->re_caps & RE_C_HWIM);
3236 /* FALL THROUGH */
3237 case RE_IMTYPE_NONE:
3238 sc->re_intrs = RE_INTRS;
3239 sc->re_rx_ack = RE_ISR_RX_OK | RE_ISR_FIFO_OFLOW |
3240 RE_ISR_RX_OVERRUN;
3241 sc->re_tx_ack = RE_ISR_TX_OK;
3242 break;
3243
3244 case RE_IMTYPE_SIM:
3245 sc->re_intrs = RE_INTRS_TIMER;
3246 sc->re_rx_ack = RE_ISR_TIMEOUT_EXPIRED;
3247 sc->re_tx_ack = RE_ISR_TIMEOUT_EXPIRED;
3248 break;
3249
3250 default:
3251 panic("%s: unknown imtype %d",
3252 sc->arpcom.ac_if.if_xname, imtype);
3253 }
3254 }
3255
3256 static void
3257 re_setup_intr(struct re_softc *sc, int enable_intrs, int imtype)
3258 {
3259 re_config_imtype(sc, imtype);
3260
3261 if (enable_intrs)
3262 CSR_WRITE_2(sc, RE_IMR, sc->re_intrs);
3263 else
3264 CSR_WRITE_2(sc, RE_IMR, 0);
3265
3266 sc->re_npoll.ifpc_stcount = 0;
3267
3268 switch (imtype) {
3269 case RE_IMTYPE_NONE:
3270 re_disable_sim_im(sc);
3271 re_disable_hw_im(sc);
3272 break;
3273
3274 case RE_IMTYPE_HW:
3275 KKASSERT(sc->re_caps & RE_C_HWIM);
3276 re_disable_sim_im(sc);
3277 re_setup_hw_im(sc);
3278 break;
3279
3280 case RE_IMTYPE_SIM:
3281 re_disable_hw_im(sc);
3282 re_setup_sim_im(sc);
3283 break;
3284
3285 default:
3286 panic("%s: unknown imtype %d",
3287 sc->arpcom.ac_if.if_xname, imtype);
3288 }
3289 }
3290
3291 static void
3292 re_get_eaddr(struct re_softc *sc, uint8_t *eaddr)
3293 {
3294 int i;
3295
3296 if (sc->re_caps & RE_C_EE_EADDR) {
3297 uint16_t re_did;
3298
3299 re_get_eewidth(sc);
3300 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1);
3301 if (re_did == 0x8128) {
3302 uint16_t as[ETHER_ADDR_LEN / 2];
3303
3304 /*
3305 * Get station address from the EEPROM.
3306 */
3307 re_read_eeprom(sc, (caddr_t)as, sc->re_ee_eaddr, 3);
3308 for (i = 0; i < ETHER_ADDR_LEN / 2; i++)
3309 as[i] = le16toh(as[i]);
3310 bcopy(as, eaddr, ETHER_ADDR_LEN);
3311 return;
3312 }
3313 }
3314
3315 /*
3316 * Get station address from IDRx.
3317 */
3318 for (i = 0; i < ETHER_ADDR_LEN; ++i)
3319 eaddr[i] = CSR_READ_1(sc, RE_IDR0 + i);
3320 }
3321
3322 static int
3323 re_jpool_alloc(struct re_softc *sc)
3324 {
3325 struct re_list_data *ldata = &sc->re_ldata;
3326 struct re_jbuf *jbuf;
3327 bus_addr_t paddr;
3328 bus_size_t jpool_size;
3329 bus_dmamem_t dmem;
3330 caddr_t buf;
3331 int i, error;
3332
3333 lwkt_serialize_init(&ldata->re_jbuf_serializer);
3334
3335 ldata->re_jbuf = kmalloc(sizeof(struct re_jbuf) * RE_JBUF_COUNT(sc),
3336 M_DEVBUF, M_WAITOK | M_ZERO);
3337
3338 jpool_size = RE_JBUF_COUNT(sc) * RE_JBUF_SIZE;
3339
3340 error = bus_dmamem_coherent(sc->re_parent_tag,
3341 RE_RXBUF_ALIGN, 0,
3342 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
3343 jpool_size, BUS_DMA_WAITOK, &dmem);
3344 if (error) {
3345 device_printf(sc->re_dev, "could not allocate jumbo memory\n");
3346 return error;
3347 }
3348 ldata->re_jpool_tag = dmem.dmem_tag;
3349 ldata->re_jpool_map = dmem.dmem_map;
3350 ldata->re_jpool = dmem.dmem_addr;
3351 paddr = dmem.dmem_busaddr;
3352
3353 /* ..and split it into 9KB chunks */
3354 SLIST_INIT(&ldata->re_jbuf_free);
3355
3356 buf = ldata->re_jpool;
3357 for (i = 0; i < RE_JBUF_COUNT(sc); i++) {
3358 jbuf = &ldata->re_jbuf[i];
3359
3360 jbuf->re_sc = sc;
3361 jbuf->re_inuse = 0;
3362 jbuf->re_slot = i;
3363 jbuf->re_buf = buf;
3364 jbuf->re_paddr = paddr;
3365
3366 SLIST_INSERT_HEAD(&ldata->re_jbuf_free, jbuf, re_link);
3367
3368 buf += RE_JBUF_SIZE;
3369 paddr += RE_JBUF_SIZE;
3370 }
3371 return 0;
3372 }
3373
3374 static void
3375 re_jpool_free(struct re_softc *sc)
3376 {
3377 struct re_list_data *ldata = &sc->re_ldata;
3378
3379 if (ldata->re_jpool_tag != NULL) {
3380 bus_dmamap_unload(ldata->re_jpool_tag, ldata->re_jpool_map);
3381 bus_dmamem_free(ldata->re_jpool_tag, ldata->re_jpool,
3382 ldata->re_jpool_map);
3383 bus_dma_tag_destroy(ldata->re_jpool_tag);
3384 ldata->re_jpool_tag = NULL;
3385 }
3386
3387 if (ldata->re_jbuf != NULL) {
3388 kfree(ldata->re_jbuf, M_DEVBUF);
3389 ldata->re_jbuf = NULL;
3390 }
3391 }
3392
3393 static struct re_jbuf *
3394 re_jbuf_alloc(struct re_softc *sc)
3395 {
3396 struct re_list_data *ldata = &sc->re_ldata;
3397 struct re_jbuf *jbuf;
3398
3399 lwkt_serialize_enter(&ldata->re_jbuf_serializer);
3400
3401 jbuf = SLIST_FIRST(&ldata->re_jbuf_free);
3402 if (jbuf != NULL) {
3403 SLIST_REMOVE_HEAD(&ldata->re_jbuf_free, re_link);
3404 jbuf->re_inuse = 1;
3405 }
3406
3407 lwkt_serialize_exit(&ldata->re_jbuf_serializer);
3408
3409 return jbuf;
3410 }
3411
3412 static void
3413 re_jbuf_free(void *arg)
3414 {
3415 struct re_jbuf *jbuf = arg;
3416 struct re_softc *sc = jbuf->re_sc;
3417 struct re_list_data *ldata = &sc->re_ldata;
3418
3419 if (&ldata->re_jbuf[jbuf->re_slot] != jbuf) {
3420 panic("%s: free wrong jumbo buffer",
3421 sc->arpcom.ac_if.if_xname);
3422 } else if (jbuf->re_inuse == 0) {
3423 panic("%s: jumbo buffer already freed",
3424 sc->arpcom.ac_if.if_xname);
3425 }
3426
3427 lwkt_serialize_enter(&ldata->re_jbuf_serializer);
3428 atomic_subtract_int(&jbuf->re_inuse, 1);
3429 if (jbuf->re_inuse == 0)
3430 SLIST_INSERT_HEAD(&ldata->re_jbuf_free, jbuf, re_link);
3431 lwkt_serialize_exit(&ldata->re_jbuf_serializer);
3432 }
3433
3434 static void
3435 re_jbuf_ref(void *arg)
3436 {
3437 struct re_jbuf *jbuf = arg;
3438 struct re_softc *sc = jbuf->re_sc;
3439 struct re_list_data *ldata = &sc->re_ldata;
3440
3441 if (&ldata->re_jbuf[jbuf->re_slot] != jbuf) {
3442 panic("%s: ref wrong jumbo buffer",
3443 sc->arpcom.ac_if.if_xname);
3444 } else if (jbuf->re_inuse == 0) {
3445 panic("%s: jumbo buffer already freed",
3446 sc->arpcom.ac_if.if_xname);
3447 }
3448 atomic_add_int(&jbuf->re_inuse, 1);
3449 }
Cache object: 331611664b952a10b5a263ff7983d7d0
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