2 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995
4 * This software may be used, modified, copied, distributed, and sold, in
5 * both source and binary form provided that the above copyright, these
6 * terms and the following disclaimer are retained. The name of the author
7 * and/or the contributor may not be used to endorse or promote products
8 * derived from this software without specific prior written permission.
10 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND
11 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
12 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
13 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE
14 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
15 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
16 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION.
17 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
18 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
19 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * $FreeBSD: src/sys/dev/fe/if_fe.c,v 1.65.2.1 2000/09/22 10:01:47 nyan Exp $
26 * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards.
27 * Contributed by M. Sekiguchi. <seki@sysrap.cs.fujitsu.co.jp>
29 * This version is intended to be a generic template for various
30 * MB86960A/MB86965A based Ethernet cards. It currently supports
31 * Fujitsu FMV-180 series for ISA and Allied-Telesis AT1700/RE2000
32 * series for ISA, as well as Fujitsu MBH10302 PC card.
33 * There are some currently-
34 * unused hooks embedded, which are primarily intended to support
35 * other types of Ethernet cards, but the author is not sure whether
38 * This version also includes some alignments to support RE1000,
39 * C-NET(98)P2 and so on. These cards are not for AT-compatibles,
40 * but for NEC PC-98 bus -- a proprietary bus architecture available
41 * only in Japan. Confusingly, it is different from the Microsoft's
42 * PC98 architecture. :-{
43 * Further work for PC-98 version will be available as a part of
44 * FreeBSD(98) project.
46 * This software is a derivative work of if_ed.c version 1.56 by David
47 * Greenman available as a part of FreeBSD 2.0 RELEASE source distribution.
49 * The following lines are retained from the original if_ed.c:
51 * Copyright (C) 1993, David Greenman. This software may be used, modified,
52 * copied, distributed, and sold, in both source and binary form provided
53 * that the above copyright and these terms are retained. Under no
54 * circumstances is the author responsible for the proper functioning
55 * of this software, nor does the author assume any responsibility
56 * for damages incurred with its use.
61 * o To support ISA PnP auto configuration for FMV-183/184.
62 * o To support REX-9886/87(PC-98 only).
63 * o To reconsider mbuf usage.
64 * o To reconsider transmission buffer usage, including
65 * transmission buffer size (currently 4KB x 2) and pros-and-
66 * cons of multiple frame transmission.
67 * o To test new-bus frontend.
73 #include <sys/param.h>
74 #include <sys/systm.h>
75 #include <sys/socket.h>
76 #include <sys/sockio.h>
78 #include <sys/interrupt.h>
79 #include <sys/linker_set.h>
80 #include <sys/module.h>
83 #include <sys/thread2.h>
85 #include <net/ethernet.h>
87 #include <net/ifq_var.h>
88 #include <net/if_dl.h>
89 #include <net/if_mib.h>
90 #include <net/if_media.h>
92 #include <netinet/in.h>
93 #include <netinet/if_ether.h>
102 * Transmit just one packet per a "send" command to 86960.
103 * This option is intended for performance test. An EXPERIMENTAL option.
105 #ifndef FE_SINGLE_TRANSMISSION
106 #define FE_SINGLE_TRANSMISSION 0
110 * Maximum loops when interrupt.
111 * This option prevents an infinite loop due to hardware failure.
112 * (Some laptops make an infinite loop after PC-Card is ejected.)
115 #define FE_MAX_LOOP 0x800
119 * If you define this option, 8-bit cards are also supported.
121 /*#define FE_8BIT_SUPPORT*/
124 * Device configuration flags.
127 /* DLCR6 settings. */
128 #define FE_FLAGS_DLCR6_VALUE 0x007F
130 /* Force DLCR6 override. */
131 #define FE_FLAGS_OVERRIDE_DLCR6 0x0080
134 devclass_t fe_devclass;
137 * Special filter values.
139 static struct fe_filter const fe_filter_nothing = { FE_FILTER_NOTHING };
140 static struct fe_filter const fe_filter_all = { FE_FILTER_ALL };
142 /* Standard driver entry points. These can be static. */
143 static void fe_init (void *);
144 static void fe_intr (void *);
145 static int fe_ioctl (struct ifnet *, u_long, caddr_t,
147 static void fe_start (struct ifnet *,
148 struct ifaltq_subque *);
149 static void fe_watchdog (struct ifnet *);
150 static int fe_medchange (struct ifnet *);
151 static void fe_medstat (struct ifnet *, struct ifmediareq *);
153 /* Local functions. Order of declaration is confused. FIXME. */
154 static int fe_get_packet ( struct fe_softc *, u_short );
155 static void fe_tint ( struct fe_softc *, u_char );
156 static void fe_rint ( struct fe_softc *, u_char );
157 static void fe_xmit ( struct fe_softc * );
158 static void fe_write_mbufs ( struct fe_softc *, struct mbuf * );
159 static void fe_setmode ( struct fe_softc * );
160 static void fe_loadmar ( struct fe_softc * );
163 static void fe_emptybuffer ( struct fe_softc * );
166 DECLARE_DUMMY_MODULE(if_fe);
169 * Fe driver specific constants which relate to 86960/86965.
172 /* Interrupt masks */
173 #define FE_TMASK ( FE_D2_COLL16 | FE_D2_TXDONE )
174 #define FE_RMASK ( FE_D3_OVRFLO | FE_D3_CRCERR \
175 | FE_D3_ALGERR | FE_D3_SRTPKT | FE_D3_PKTRDY )
177 /* Maximum number of iterations for a receive interrupt. */
178 #define FE_MAX_RECV_COUNT ( ( 65536 - 2048 * 2 ) / 64 )
180 * Maximum size of SRAM is 65536,
181 * minimum size of transmission buffer in fe is 2x2KB,
182 * and minimum amount of received packet including headers
183 * added by the chip is 64 bytes.
184 * Hence FE_MAX_RECV_COUNT is the upper limit for number
185 * of packets in the receive buffer.
189 * Miscellaneous definitions not directly related to hardware.
192 /* The following line must be delete when "net/if_media.h" support it. */
194 #define IFM_10_FL /* 13 */ IFM_10_5
198 /* Mapping between media bitmap (in fe_softc.mbitmap) and ifm_media. */
199 static int const bit2media [] = {
200 IFM_HDX | IFM_ETHER | IFM_AUTO,
201 IFM_HDX | IFM_ETHER | IFM_MANUAL,
202 IFM_HDX | IFM_ETHER | IFM_10_T,
203 IFM_HDX | IFM_ETHER | IFM_10_2,
204 IFM_HDX | IFM_ETHER | IFM_10_5,
205 IFM_HDX | IFM_ETHER | IFM_10_FL,
206 IFM_FDX | IFM_ETHER | IFM_10_T,
207 /* More can be come here... */
211 /* Mapping between media bitmap (in fe_softc.mbitmap) and ifm_media. */
212 static int const bit2media [] = {
213 IFM_ETHER | IFM_AUTO,
214 IFM_ETHER | IFM_MANUAL,
215 IFM_ETHER | IFM_10_T,
216 IFM_ETHER | IFM_10_2,
217 IFM_ETHER | IFM_10_5,
218 IFM_ETHER | IFM_10_FL,
219 IFM_ETHER | IFM_10_T,
220 /* More can be come here... */
226 * Check for specific bits in specific registers have specific values.
227 * A common utility function called from various sub-probe routines.
230 fe_simple_probe (struct fe_softc const * sc,
231 struct fe_simple_probe_struct const * sp)
233 struct fe_simple_probe_struct const *p;
235 for (p = sp; p->mask != 0; p++) {
236 if ((fe_inb(sc, p->port) & p->mask) != p->bits)
242 /* Test if a given 6 byte value is a valid Ethernet station (MAC)
243 address. "Vendor" is an expected vendor code (first three bytes,)
244 or a zero when nothing expected. */
246 valid_Ether_p (u_char const * addr, unsigned vendor)
249 char ethstr[ETHER_ADDRSTRLEN + 1];
250 kprintf("fe?: validating %s against %06x\n", kether_ntoa(addr, ethstr),
254 /* All zero is not allowed as a vendor code. */
255 if (addr[0] == 0 && addr[1] == 0 && addr[2] == 0) return 0;
259 /* Legal Ethernet address (stored in ROM) must have
260 its Group and Local bits cleared. */
261 if ((addr[0] & 0x03) != 0) return 0;
264 /* Same as above, but a local address is allowed in
266 if ((addr[0] & 0x01) != 0) return 0;
269 /* Make sure the vendor part matches if one is given. */
270 if ( addr[0] != ((vendor >> 16) & 0xFF)
271 || addr[1] != ((vendor >> 8) & 0xFF)
272 || addr[2] != ((vendor ) & 0xFF)) return 0;
276 /* Host part must not be all-zeros nor all-ones. */
277 if (addr[3] == 0xFF && addr[4] == 0xFF && addr[5] == 0xFF) return 0;
278 if (addr[3] == 0x00 && addr[4] == 0x00 && addr[5] == 0x00) return 0;
280 /* Given addr looks like an Ethernet address. */
284 /* Fill our softc struct with default value. */
286 fe_softc_defaults (struct fe_softc *sc)
288 /* Prepare for typical register prototypes. We assume a
289 "typical" board has <32KB> of <fast> SRAM connected with a
290 <byte-wide> data lines. */
291 sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
293 sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB
294 | FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
295 sc->proto_dlcr7 = FE_D7_BYTSWP_LH;
296 sc->proto_bmpr13 = 0;
298 /* Assume the probe process (to be done later) is stable. */
301 /* A typical board needs no hooks. */
305 /* Assume the board has no software-controllable media selection. */
307 sc->defmedia = MB_HM;
311 /* Common error reporting routine used in probe routines for
312 "soft configured IRQ"-type boards. */
314 fe_irq_failure (char const *name, int unit, int irq, char const *list)
316 kprintf("fe%d: %s board is detected, but %s IRQ was given\n",
317 unit, name, (irq == NO_IRQ ? "no" : "invalid"));
319 kprintf("fe%d: specify an IRQ from %s in kernel config\n",
325 * Hardware (vendor) specific hooks.
329 * Generic media selection scheme for MB86965 based boards.
332 fe_msel_965 (struct fe_softc *sc)
336 /* Find the appropriate bits for BMPR13 tranceiver control. */
337 switch (IFM_SUBTYPE(sc->media.ifm_media)) {
338 case IFM_AUTO: b13 = FE_B13_PORT_AUTO | FE_B13_TPTYPE_UTP; break;
339 case IFM_10_T: b13 = FE_B13_PORT_TP | FE_B13_TPTYPE_UTP; break;
340 default: b13 = FE_B13_PORT_AUI; break;
343 /* Write it into the register. It takes effect immediately. */
344 fe_outb(sc, FE_BMPR13, sc->proto_bmpr13 | b13);
349 * Fujitsu MB86965 JLI mode support routines.
353 * Routines to read all bytes from the config EEPROM through MB86965A.
354 * It is a MicroWire (3-wire) serial EEPROM with 6-bit address.
358 fe_strobe_eeprom_jli (struct fe_softc *sc, u_short bmpr16)
361 * We must guarantee 1us (or more) interval to access slow
362 * EEPROMs. The following redundant code provides enough
363 * delay with ISA timing. (Even if the bus clock is "tuned.")
364 * Some modification will be needed on faster busses.
366 fe_outb(sc, bmpr16, FE_B16_SELECT);
367 fe_outb(sc, bmpr16, FE_B16_SELECT | FE_B16_CLOCK);
368 fe_outb(sc, bmpr16, FE_B16_SELECT | FE_B16_CLOCK);
369 fe_outb(sc, bmpr16, FE_B16_SELECT);
373 fe_read_eeprom_jli (struct fe_softc * sc, u_char * data)
376 u_char save16, save17;
379 /* Save the current value of the EEPROM interface registers. */
380 save16 = fe_inb(sc, FE_BMPR16);
381 save17 = fe_inb(sc, FE_BMPR17);
383 /* Read bytes from EEPROM; two bytes per an iteration. */
384 for (n = 0; n < JLI_EEPROM_SIZE / 2; n++) {
386 /* Reset the EEPROM interface. */
387 fe_outb(sc, FE_BMPR16, 0x00);
388 fe_outb(sc, FE_BMPR17, 0x00);
390 /* Start EEPROM access. */
391 fe_outb(sc, FE_BMPR16, FE_B16_SELECT);
392 fe_outb(sc, FE_BMPR17, FE_B17_DATA);
393 fe_strobe_eeprom_jli(sc, FE_BMPR16);
395 /* Pass the iteration count as well as a READ command. */
397 for (bit = 0x80; bit != 0x00; bit >>= 1) {
398 fe_outb(sc, FE_BMPR17, (val & bit) ? FE_B17_DATA : 0);
399 fe_strobe_eeprom_jli(sc, FE_BMPR16);
401 fe_outb(sc, FE_BMPR17, 0x00);
405 for (bit = 0x80; bit != 0x00; bit >>= 1) {
406 fe_strobe_eeprom_jli(sc, FE_BMPR16);
407 if (fe_inb(sc, FE_BMPR17) & FE_B17_DATA)
412 /* Read one more byte. */
414 for (bit = 0x80; bit != 0x00; bit >>= 1) {
415 fe_strobe_eeprom_jli(sc, FE_BMPR16);
416 if (fe_inb(sc, FE_BMPR17) & FE_B17_DATA)
423 /* Reset the EEPROM interface, again. */
424 fe_outb(sc, FE_BMPR16, 0x00);
425 fe_outb(sc, FE_BMPR17, 0x00);
427 /* Make sure to restore the original value of EEPROM interface
428 registers, since we are not yet sure we have MB86965A on
430 fe_outb(sc, FE_BMPR17, save17);
431 fe_outb(sc, FE_BMPR16, save16);
435 /* Report what we got. */
438 data -= JLI_EEPROM_SIZE;
439 for (i = 0; i < JLI_EEPROM_SIZE; i += 16) {
440 hexncpy(data + i, 16, hexstr, 48, " ");
441 kprintf("fe%d: EEPROM(JLI):%3x: %s\n",
442 sc->sc_unit, i, hexstr);
449 fe_init_jli (struct fe_softc * sc)
451 /* "Reset" by writing into a magic location. */
453 fe_outb(sc, 0x1E, fe_inb(sc, 0x1E));
459 * SSi 78Q8377A support routines.
463 * Routines to read all bytes from the config EEPROM through 78Q8377A.
464 * It is a MicroWire (3-wire) serial EEPROM with 8-bit address. (I.e.,
467 * As I don't have SSi manuals, (hmm, an old song again!) I'm not exactly
468 * sure the following code is correct... It is just stolen from the
469 * C-NET(98)P2 support routine in FreeBSD(98).
473 fe_read_eeprom_ssi (struct fe_softc *sc, u_char *data)
477 u_char save6, save7, save12;
480 /* Save the current value for the DLCR registers we are about
482 save6 = fe_inb(sc, FE_DLCR6);
483 save7 = fe_inb(sc, FE_DLCR7);
485 /* Put the 78Q8377A into a state that we can access the EEPROM. */
486 fe_outb(sc, FE_DLCR6,
487 FE_D6_BBW_WORD | FE_D6_SBW_WORD | FE_D6_DLC_DISABLE);
488 fe_outb(sc, FE_DLCR7,
489 FE_D7_BYTSWP_LH | FE_D7_RBS_BMPR | FE_D7_RDYPNS | FE_D7_POWER_UP);
491 /* Save the current value for the BMPR12 register, too. */
492 save12 = fe_inb(sc, FE_DLCR12);
494 /* Read bytes from EEPROM; two bytes per an iteration. */
495 for (n = 0; n < SSI_EEPROM_SIZE / 2; n++) {
497 /* Start EEPROM access */
498 fe_outb(sc, FE_DLCR12, SSI_EEP);
499 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL);
501 /* Send the following four bits to the EEPROM in the
502 specified order: a dummy bit, a start bit, and
503 command bits (10) for READ. */
504 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL );
505 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK ); /* 0 */
506 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_DAT);
507 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | SSI_DAT); /* 1 */
508 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_DAT);
509 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | SSI_DAT); /* 1 */
510 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL );
511 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK ); /* 0 */
513 /* Pass the iteration count to the chip. */
514 for (bit = 0x80; bit != 0x00; bit >>= 1) {
515 val = ( n & bit ) ? SSI_DAT : 0;
516 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | val);
517 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | val);
522 for (bit = 0x80; bit != 0x00; bit >>= 1) {
523 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL);
524 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK);
525 if (fe_inb(sc, FE_DLCR12) & SSI_DIN)
530 /* Read one more byte. */
532 for (bit = 0x80; bit != 0x00; bit >>= 1) {
533 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL);
534 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK);
535 if (fe_inb(sc, FE_DLCR12) & SSI_DIN)
540 fe_outb(sc, FE_DLCR12, SSI_EEP);
543 /* Reset the EEPROM interface. (For now.) */
544 fe_outb(sc, FE_DLCR12, 0x00);
546 /* Restore the saved register values, for the case that we
547 didn't have 78Q8377A at the given address. */
548 fe_outb(sc, FE_DLCR12, save12);
549 fe_outb(sc, FE_DLCR7, save7);
550 fe_outb(sc, FE_DLCR6, save6);
553 /* Report what we got. */
556 data -= SSI_EEPROM_SIZE;
557 for (i = 0; i < SSI_EEPROM_SIZE; i += 16) {
558 hexncpy(data + i, 16, hexstr, 48, " ");
559 kprintf("fe%d: EEPROM(SSI):%3x: %s\n",
560 sc->sc_unit, i, hexstr);
567 * TDK/LANX boards support routines.
570 /* It is assumed that the CLK line is low and SDA is high (float) upon entry. */
571 #define LNX_PH(D,K,N) \
572 ((LNX_SDA_##D | LNX_CLK_##K) << N)
573 #define LNX_CYCLE(D1,D2,D3,D4,K1,K2,K3,K4) \
574 (LNX_PH(D1,K1,0)|LNX_PH(D2,K2,8)|LNX_PH(D3,K3,16)|LNX_PH(D4,K4,24))
576 #define LNX_CYCLE_START LNX_CYCLE(HI,LO,LO,HI, HI,HI,LO,LO)
577 #define LNX_CYCLE_STOP LNX_CYCLE(LO,LO,HI,HI, LO,HI,HI,LO)
578 #define LNX_CYCLE_HI LNX_CYCLE(HI,HI,HI,HI, LO,HI,LO,LO)
579 #define LNX_CYCLE_LO LNX_CYCLE(LO,LO,LO,HI, LO,HI,LO,LO)
580 #define LNX_CYCLE_INIT LNX_CYCLE(LO,HI,HI,HI, LO,LO,LO,LO)
583 fe_eeprom_cycle_lnx (struct fe_softc *sc, u_short reg20, u_long cycle)
585 fe_outb(sc, reg20, (cycle ) & 0xFF);
587 fe_outb(sc, reg20, (cycle >> 8) & 0xFF);
589 fe_outb(sc, reg20, (cycle >> 16) & 0xFF);
591 fe_outb(sc, reg20, (cycle >> 24) & 0xFF);
596 fe_eeprom_receive_lnx (struct fe_softc *sc, u_short reg20)
600 fe_outb(sc, reg20, LNX_CLK_HI | LNX_SDA_FL);
602 dat = fe_inb(sc, reg20);
603 fe_outb(sc, reg20, LNX_CLK_LO | LNX_SDA_FL);
605 return (dat & LNX_SDA_IN);
609 fe_read_eeprom_lnx (struct fe_softc *sc, u_char *data)
614 u_short reg20 = 0x14;
617 save20 = fe_inb(sc, reg20);
619 /* NOTE: DELAY() timing constants are approximately three
620 times longer (slower) than the required minimum. This is
621 to guarantee a reliable operation under some tough
622 conditions... Fortunately, this routine is only called
623 during the boot phase, so the speed is less important than
627 /* Reset the X24C01's internal state machine and put it into
628 the IDLE state. We usually don't need this, but *if*
629 someone (e.g., probe routine of other driver) write some
630 garbage into the register at 0x14, synchronization will be
631 lost, and the normal EEPROM access protocol won't work.
632 Moreover, as there are no easy way to reset, we need a
633 _manoeuvre_ here. (It even lacks a reset pin, so pushing
634 the RESET button on the PC doesn't help!) */
635 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_INIT);
636 for (i = 0; i < 10; i++)
637 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_START);
638 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_STOP);
642 /* Issue a start condition. */
643 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_START);
645 /* Send seven bits of the starting address (zero, in this
646 case) and a command bit for READ. */
648 for (bit = 0x80; bit != 0x00; bit >>= 1) {
650 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_HI);
652 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_LO);
656 /* Receive an ACK bit. */
657 if (fe_eeprom_receive_lnx(sc, reg20)) {
658 /* ACK was not received. EEPROM is not present (i.e.,
659 this board was not a TDK/LANX) or not working
662 kprintf("fe%d: no ACK received from EEPROM(LNX)\n",
665 /* Clear the given buffer to indicate we could not get
666 any info. and return. */
667 bzero(data, LNX_EEPROM_SIZE);
671 /* Read bytes from EEPROM. */
672 for (n = 0; n < LNX_EEPROM_SIZE; n++) {
674 /* Read a byte and store it into the buffer. */
676 for (bit = 0x80; bit != 0x00; bit >>= 1) {
677 if (fe_eeprom_receive_lnx(sc, reg20))
682 /* Acknowledge if we have to read more. */
683 if (n < LNX_EEPROM_SIZE - 1) {
684 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_LO);
688 /* Issue a STOP condition, de-activating the clock line.
689 It will be safer to keep the clock line low than to leave
691 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_STOP);
694 fe_outb(sc, reg20, save20);
697 /* Report what we got. */
699 data -= LNX_EEPROM_SIZE;
700 for (i = 0; i < LNX_EEPROM_SIZE; i += 16) {
701 hexncpy(data + i, 16, hexstr, 48, " ");
702 kprintf("fe%d: EEPROM(LNX):%3x: %s\n",
703 sc->sc_unit, i, hexstr);
710 fe_init_lnx (struct fe_softc * sc)
712 /* Reset the 86960. Do we need this? FIXME. */
713 fe_outb(sc, 0x12, 0x06);
715 fe_outb(sc, 0x12, 0x07);
718 /* Setup IRQ control register on the ASIC. */
719 fe_outb(sc, 0x14, sc->priv_info);
724 * Ungermann-Bass boards support routine.
727 fe_init_ubn (struct fe_softc * sc)
729 /* Do we need this? FIXME. */
730 fe_outb(sc, FE_DLCR7,
731 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP);
732 fe_outb(sc, 0x18, 0x00);
735 /* Setup IRQ control register on the ASIC. */
736 fe_outb(sc, 0x14, sc->priv_info);
741 * Install interface into kernel networking data structures
744 fe_attach (device_t dev)
746 struct fe_softc *sc = device_get_softc(dev);
747 int flags = device_get_flags(dev);
751 * Initialize ifnet structure
753 sc->sc_if.if_softc = sc;
754 if_initname(&(sc->sc_if), "fe", sc->sc_unit);
755 sc->sc_if.if_start = fe_start;
756 sc->sc_if.if_ioctl = fe_ioctl;
757 sc->sc_if.if_watchdog = fe_watchdog;
758 sc->sc_if.if_init = fe_init;
759 sc->sc_if.if_linkmib = &sc->mibdata;
760 sc->sc_if.if_linkmiblen = sizeof (sc->mibdata);
762 #if 0 /* I'm not sure... */
763 sc->mibdata.dot3Compliance = DOT3COMPLIANCE_COLLS;
767 * Set fixed interface flags.
769 sc->sc_if.if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
770 ifq_set_maxlen(&sc->sc_if.if_snd, IFQ_MAXLEN);
771 ifq_set_ready(&sc->sc_if.if_snd);
773 #if FE_SINGLE_TRANSMISSION
774 /* Override txb config to allocate minimum. */
775 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ
776 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
779 /* Modify hardware config if it is requested. */
780 if (flags & FE_FLAGS_OVERRIDE_DLCR6)
781 sc->proto_dlcr6 = flags & FE_FLAGS_DLCR6_VALUE;
783 /* Find TX buffer size, based on the hardware dependent proto. */
784 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) {
785 case FE_D6_TXBSIZ_2x2KB: sc->txb_size = 2048; break;
786 case FE_D6_TXBSIZ_2x4KB: sc->txb_size = 4096; break;
787 case FE_D6_TXBSIZ_2x8KB: sc->txb_size = 8192; break;
789 /* Oops, we can't work with single buffer configuration. */
791 kprintf("fe%d: strange TXBSIZ config; fixing\n",
794 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ;
795 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
800 /* Initialize the if_media interface. */
801 ifmedia_init(&sc->media, 0, fe_medchange, fe_medstat);
802 for (b = 0; bit2media[b] != 0; b++) {
803 if (sc->mbitmap & (1 << b)) {
804 ifmedia_add(&sc->media, bit2media[b], 0, NULL);
807 for (b = 0; bit2media[b] != 0; b++) {
808 if (sc->defmedia & (1 << b)) {
809 ifmedia_set(&sc->media, bit2media[b]);
813 #if 0 /* Turned off; this is called later, when the interface UPs. */
817 /* Attach and stop the interface. */
818 ether_ifattach(&sc->sc_if, sc->sc_enaddr, NULL);
820 ifq_set_cpuid(&sc->sc_if.if_snd, rman_get_cpuid(sc->irq_res));
824 error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
825 fe_intr, sc, &sc->irq_handle,
826 sc->sc_if.if_serializer);
828 if_detach(&sc->sc_if);
829 fe_release_resource(dev);
833 /* Print additional info when attached. */
834 device_printf(dev, "type %s%s\n", sc->typestr,
835 (sc->proto_dlcr4 & FE_D4_DSC) ? ", full duplex" : "");
837 int buf, txb, bbw, sbw, ram;
839 buf = txb = bbw = sbw = ram = -1;
840 switch ( sc->proto_dlcr6 & FE_D6_BUFSIZ ) {
841 case FE_D6_BUFSIZ_8KB: buf = 8; break;
842 case FE_D6_BUFSIZ_16KB: buf = 16; break;
843 case FE_D6_BUFSIZ_32KB: buf = 32; break;
844 case FE_D6_BUFSIZ_64KB: buf = 64; break;
846 switch ( sc->proto_dlcr6 & FE_D6_TXBSIZ ) {
847 case FE_D6_TXBSIZ_2x2KB: txb = 2; break;
848 case FE_D6_TXBSIZ_2x4KB: txb = 4; break;
849 case FE_D6_TXBSIZ_2x8KB: txb = 8; break;
851 switch ( sc->proto_dlcr6 & FE_D6_BBW ) {
852 case FE_D6_BBW_BYTE: bbw = 8; break;
853 case FE_D6_BBW_WORD: bbw = 16; break;
855 switch ( sc->proto_dlcr6 & FE_D6_SBW ) {
856 case FE_D6_SBW_BYTE: sbw = 8; break;
857 case FE_D6_SBW_WORD: sbw = 16; break;
859 switch ( sc->proto_dlcr6 & FE_D6_SRAM ) {
860 case FE_D6_SRAM_100ns: ram = 100; break;
861 case FE_D6_SRAM_150ns: ram = 150; break;
863 device_printf(dev, "SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n",
864 buf, bbw, ram, txb, sbw);
866 if (sc->stability & UNSTABLE_IRQ)
867 device_printf(dev, "warning: IRQ number may be incorrect\n");
868 if (sc->stability & UNSTABLE_MAC)
869 device_printf(dev, "warning: above MAC address may be incorrect\n");
870 if (sc->stability & UNSTABLE_TYPE)
871 device_printf(dev, "warning: hardware type was not validated\n");
877 fe_alloc_port(device_t dev, int size)
879 struct fe_softc *sc = device_get_softc(dev);
880 struct resource *res;
884 res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
885 0ul, ~0ul, size, RF_ACTIVE);
887 sc->port_used = size;
889 sc->iot = rman_get_bustag(res);
890 sc->ioh = rman_get_bushandle(res);
898 fe_alloc_irq(device_t dev, int flags)
900 struct fe_softc *sc = device_get_softc(dev);
901 struct resource *res;
905 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE | flags);
915 fe_release_resource(device_t dev)
917 struct fe_softc *sc = device_get_softc(dev);
920 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port_res);
924 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
930 * Reset interface, after some (hardware) trouble is deteced.
933 fe_reset (struct fe_softc *sc)
935 /* Record how many packets are lost by this accident. */
936 IFNET_STAT_INC(&sc->sc_if, oerrors, sc->txb_sched + sc->txb_count);
937 sc->mibdata.dot3StatsInternalMacTransmitErrors++;
939 /* Put the interface into known initial state. */
941 if (sc->sc_if.if_flags & IFF_UP)
946 * Stop everything on the interface.
948 * All buffered packets, both transmitting and receiving,
949 * if any, will be lost by stopping the interface.
952 fe_stop (struct fe_softc *sc)
954 /* Disable interrupts. */
955 fe_outb(sc, FE_DLCR2, 0x00);
956 fe_outb(sc, FE_DLCR3, 0x00);
958 /* Stop interface hardware. */
960 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
963 /* Clear all interrupt status. */
964 fe_outb(sc, FE_DLCR0, 0xFF);
965 fe_outb(sc, FE_DLCR1, 0xFF);
967 /* Put the chip in stand-by mode. */
969 fe_outb(sc, FE_DLCR7, sc->proto_dlcr7 | FE_D7_POWER_DOWN);
972 /* Reset transmitter variables and interface flags. */
973 sc->sc_if.if_flags &= ~IFF_RUNNING;
974 ifq_clr_oactive(&sc->sc_if.if_snd);
975 sc->sc_if.if_timer = 0;
976 sc->txb_free = sc->txb_size;
980 /* MAR loading can be delayed. */
981 sc->filter_change = 0;
983 /* Call a device-specific hook. */
989 * Device timeout/watchdog routine. Entered if the device neglects to
990 * generate an interrupt after a transmit has been started on it.
993 fe_watchdog ( struct ifnet *ifp )
995 struct fe_softc *sc = (struct fe_softc *)ifp;
998 /* A "debug" message. */
999 kprintf("%s: transmission timeout (%d+%d)%s\n",
1000 ifp->if_xname, sc->txb_sched, sc->txb_count,
1001 (ifp->if_flags & IFF_UP) ? "" : " when down");
1002 IFNET_STAT_GET(&sc->sc_if, opackets, opkts);
1003 IFNET_STAT_GET(&sc->sc_if, ipackets, ipkts);
1004 if (opkts == 0 && ipkts == 0)
1005 kprintf("%s: wrong IRQ setting in config?\n", ifp->if_xname);
1010 * Initialize device.
1013 fe_init (void * xsc)
1015 struct fe_softc *sc = xsc;
1017 /* Start initializing 86960. */
1018 /* Call a hook before we start initializing the chip. */
1023 * Make sure to disable the chip, also.
1024 * This may also help re-programming the chip after
1025 * hot insertion of PCMCIAs.
1028 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
1031 /* Power up the chip and select register bank for DLCRs. */
1033 fe_outb(sc, FE_DLCR7,
1034 sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP);
1037 /* Feed the station address. */
1038 fe_outblk(sc, FE_DLCR8, sc->sc_enaddr, ETHER_ADDR_LEN);
1040 /* Clear multicast address filter to receive nothing. */
1041 fe_outb(sc, FE_DLCR7,
1042 sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP);
1043 fe_outblk(sc, FE_MAR8, fe_filter_nothing.data, FE_FILTER_LEN);
1045 /* Select the BMPR bank for runtime register access. */
1046 fe_outb(sc, FE_DLCR7,
1047 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP);
1049 /* Initialize registers. */
1050 fe_outb(sc, FE_DLCR0, 0xFF); /* Clear all bits. */
1051 fe_outb(sc, FE_DLCR1, 0xFF); /* ditto. */
1052 fe_outb(sc, FE_DLCR2, 0x00);
1053 fe_outb(sc, FE_DLCR3, 0x00);
1054 fe_outb(sc, FE_DLCR4, sc->proto_dlcr4);
1055 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5);
1056 fe_outb(sc, FE_BMPR10, 0x00);
1057 fe_outb(sc, FE_BMPR11, FE_B11_CTRL_SKIP | FE_B11_MODE1);
1058 fe_outb(sc, FE_BMPR12, 0x00);
1059 fe_outb(sc, FE_BMPR13, sc->proto_bmpr13);
1060 fe_outb(sc, FE_BMPR14, 0x00);
1061 fe_outb(sc, FE_BMPR15, 0x00);
1063 /* Enable interrupts. */
1064 fe_outb(sc, FE_DLCR2, FE_TMASK);
1065 fe_outb(sc, FE_DLCR3, FE_RMASK);
1067 /* Select requested media, just before enabling DLC. */
1071 /* Enable transmitter and receiver. */
1073 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_ENABLE);
1078 * Make sure to empty the receive buffer.
1080 * This may be redundant, but *if* the receive buffer were full
1081 * at this point, then the driver would hang. I have experienced
1082 * some strange hang-up just after UP. I hope the following
1083 * code solve the problem.
1085 * I have changed the order of hardware initialization.
1086 * I think the receive buffer cannot have any packets at this
1087 * point in this version. The following code *must* be
1088 * redundant now. FIXME.
1090 * I've heard a rumore that on some PC card implementation of
1091 * 8696x, the receive buffer can have some data at this point.
1092 * The following message helps discovering the fact. FIXME.
1094 if (!(fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP)) {
1095 kprintf("fe%d: receive buffer has some data after reset\n",
1100 /* Do we need this here? Actually, no. I must be paranoia. */
1101 fe_outb(sc, FE_DLCR0, 0xFF); /* Clear all bits. */
1102 fe_outb(sc, FE_DLCR1, 0xFF); /* ditto. */
1105 /* Set 'running' flag, because we are now running. */
1106 sc->sc_if.if_flags |= IFF_RUNNING;
1109 * At this point, the interface is running properly,
1110 * except that it receives *no* packets. we then call
1111 * fe_setmode() to tell the chip what packets to be
1112 * received, based on the if_flags and multicast group
1113 * list. It completes the initialization process.
1118 /* ...and attempt to start output queued packets. */
1119 /* TURNED OFF, because the semi-auto media prober wants to UP
1120 the interface keeping it idle. The upper layer will soon
1121 start the interface anyway, and there are no significant
1123 if_devstart(&sc->sc_if);
1128 * This routine actually starts the transmission on the interface
1131 fe_xmit (struct fe_softc *sc)
1134 * Set a timer just in case we never hear from the board again.
1135 * We use longer timeout for multiple packet transmission.
1136 * I'm not sure this timer value is appropriate. FIXME.
1138 sc->sc_if.if_timer = 1 + sc->txb_count;
1140 /* Update txb variables. */
1141 sc->txb_sched = sc->txb_count;
1143 sc->txb_free = sc->txb_size;
1146 /* Start transmitter, passing packets in TX buffer. */
1147 fe_outb(sc, FE_BMPR10, sc->txb_sched | FE_B10_START);
1151 * Start output on interface.
1152 * We make two assumptions here:
1153 * 1) that the current priority is set to splimp _before_ this code
1154 * is called *and* is returned to the appropriate priority after
1156 * 2) that the OACTIVE flag is checked before this code is called
1157 * (i.e. that the output part of the interface is idle)
1160 fe_start (struct ifnet *ifp, struct ifaltq_subque *ifsq)
1162 struct fe_softc *sc = ifp->if_softc;
1165 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
1168 /* Just a sanity check. */
1169 if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) {
1171 * Txb_count and txb_free co-works to manage the
1172 * transmission buffer. Txb_count keeps track of the
1173 * used potion of the buffer, while txb_free does unused
1174 * potion. So, as long as the driver runs properly,
1175 * txb_count is zero if and only if txb_free is same
1176 * as txb_size (which represents whole buffer.)
1178 kprintf("fe%d: inconsistent txb variables (%d, %d)\n",
1179 sc->sc_unit, sc->txb_count, sc->txb_free);
1181 * So, what should I do, then?
1183 * We now know txb_count and txb_free contradicts. We
1184 * cannot, however, tell which is wrong. More
1185 * over, we cannot peek 86960 transmission buffer or
1186 * reset the transmission buffer. (In fact, we can
1187 * reset the entire interface. I don't want to do it.)
1189 * If txb_count is incorrect, leaving it as-is will cause
1190 * sending of garbage after next interrupt. We have to
1191 * avoid it. Hence, we reset the txb_count here. If
1192 * txb_free was incorrect, resetting txb_count just loose
1193 * some packets. We can live with it.
1200 * First, see if there are buffered packets and an idle
1201 * transmitter - should never happen at this point.
1203 if ((sc->txb_count > 0) && (sc->txb_sched == 0)) {
1204 kprintf("fe%d: transmitter idle with %d buffered packets\n",
1205 sc->sc_unit, sc->txb_count);
1210 * Stop accepting more transmission packets temporarily, when
1211 * a filter change request is delayed. Updating the MARs on
1212 * 86960 flushes the transmission buffer, so it is delayed
1213 * until all buffered transmission packets have been sent
1216 if (sc->filter_change) {
1218 * Filter change request is delayed only when the DLC is
1219 * working. DLC soon raise an interrupt after finishing
1222 goto indicate_active;
1228 * See if there is room to put another packet in the buffer.
1229 * We *could* do better job by peeking the send queue to
1230 * know the length of the next packet. Current version just
1231 * tests against the worst case (i.e., longest packet). FIXME.
1233 * When adding the packet-peek feature, don't forget adding a
1234 * test on txb_count against QUEUEING_MAX.
1235 * There is a little chance the packet count exceeds
1236 * the limit. Assume transmission buffer is 8KB (2x8KB
1237 * configuration) and an application sends a bunch of small
1238 * (i.e., minimum packet sized) packets rapidly. An 8KB
1239 * buffer can hold 130 blocks of 62 bytes long...
1242 < ETHER_MAX_LEN - ETHER_CRC_LEN + FE_DATA_LEN_LEN) {
1244 goto indicate_active;
1247 #if FE_SINGLE_TRANSMISSION
1248 if (sc->txb_count > 0) {
1249 /* Just one packet per a transmission buffer. */
1250 goto indicate_active;
1255 * Get the next mbuf chain for a packet to send.
1257 m = ifq_dequeue(&sc->sc_if.if_snd);
1259 /* No more packets to send. */
1260 goto indicate_inactive;
1264 * Copy the mbuf chain into the transmission buffer.
1265 * txb_* variables are updated as necessary.
1267 fe_write_mbufs(sc, m);
1269 /* Start transmitter if it's idle. */
1270 if ((sc->txb_count > 0) && (sc->txb_sched == 0))
1274 * Tap off here if there is a bpf listener,
1275 * and the device is *not* in promiscuous mode.
1276 * (86960 receives self-generated packets if
1277 * and only if it is in "receive everything"
1280 if ((sc->sc_if.if_flags & IFF_PROMISC) == 0)
1281 BPF_MTAP(&sc->sc_if, m);
1288 * We are using the !OACTIVE flag to indicate to
1289 * the outside world that we can accept an
1290 * additional packet rather than that the
1291 * transmitter is _actually_ active. Indeed, the
1292 * transmitter may be active, but if we haven't
1293 * filled all the buffers with data then we still
1294 * want to accept more.
1296 ifq_clr_oactive(&sc->sc_if.if_snd);
1301 * The transmitter is active, and there are no room for
1302 * more outgoing packets in the transmission buffer.
1304 ifq_set_oactive(&sc->sc_if.if_snd);
1309 * Drop (skip) a packet from receive buffer in 86960 memory.
1312 fe_droppacket (struct fe_softc * sc, int len)
1317 * 86960 manual says that we have to read 8 bytes from the buffer
1318 * before skip the packets and that there must be more than 8 bytes
1319 * remaining in the buffer when issue a skip command.
1320 * Remember, we have already read 4 bytes before come here.
1323 /* Read 4 more bytes, and skip the rest of the packet. */
1324 #ifdef FE_8BIT_SUPPORT
1325 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1327 fe_inb(sc, FE_BMPR8);
1328 fe_inb(sc, FE_BMPR8);
1329 fe_inb(sc, FE_BMPR8);
1330 fe_inb(sc, FE_BMPR8);
1335 fe_inw(sc, FE_BMPR8);
1336 fe_inw(sc, FE_BMPR8);
1338 fe_outb(sc, FE_BMPR14, FE_B14_SKIP);
1340 /* We should not come here unless receiving RUNTs. */
1341 #ifdef FE_8BIT_SUPPORT
1342 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1344 for (i = 0; i < len; i++)
1345 fe_inb(sc, FE_BMPR8);
1350 for (i = 0; i < len; i += 2)
1351 fe_inw(sc, FE_BMPR8);
1358 * Empty receiving buffer.
1361 fe_emptybuffer (struct fe_softc * sc)
1367 kprintf("fe%d: emptying receive buffer\n", sc->sc_unit);
1371 * Stop receiving packets, temporarily.
1373 saved_dlcr5 = fe_inb(sc, FE_DLCR5);
1374 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5);
1378 * When we come here, the receive buffer management may
1379 * have been broken. So, we cannot use skip operation.
1380 * Just discard everything in the buffer.
1382 #ifdef FE_8BIT_SUPPORT
1383 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1385 for (i = 0; i < 65536; i++) {
1386 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP)
1388 fe_inb(sc, FE_BMPR8);
1394 for (i = 0; i < 65536; i += 2) {
1395 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP)
1397 fe_inw(sc, FE_BMPR8);
1404 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP) {
1405 kprintf("fe%d: could not empty receive buffer\n", sc->sc_unit);
1406 /* Hmm. What should I do if this happens? FIXME. */
1410 * Restart receiving packets.
1412 fe_outb(sc, FE_DLCR5, saved_dlcr5);
1417 * Transmission interrupt handler
1418 * The control flow of this function looks silly. FIXME.
1421 fe_tint (struct fe_softc * sc, u_char tstat)
1427 * Handle "excessive collision" interrupt.
1429 if (tstat & FE_D0_COLL16) {
1432 * Find how many packets (including this collided one)
1433 * are left unsent in transmission buffer.
1435 left = fe_inb(sc, FE_BMPR10);
1436 kprintf("fe%d: excessive collision (%d/%d)\n",
1437 sc->sc_unit, left, sc->txb_sched);
1440 * Clear the collision flag (in 86960) here
1441 * to avoid confusing statistics.
1443 fe_outb(sc, FE_DLCR0, FE_D0_COLLID);
1446 * Restart transmitter, skipping the
1449 * We *must* skip the packet to keep network running
1450 * properly. Excessive collision error is an
1451 * indication of the network overload. If we
1452 * tried sending the same packet after excessive
1453 * collision, the network would be filled with
1454 * out-of-time packets. Packets belonging
1455 * to reliable transport (such as TCP) are resent
1456 * by some upper layer.
1458 fe_outb(sc, FE_BMPR11, FE_B11_CTRL_SKIP | FE_B11_MODE1);
1460 /* Update statistics. */
1465 * Handle "transmission complete" interrupt.
1467 if (tstat & FE_D0_TXDONE) {
1470 * Add in total number of collisions on last
1471 * transmission. We also clear "collision occurred" flag
1474 * 86960 has a design flaw on collision count on multiple
1475 * packet transmission. When we send two or more packets
1476 * with one start command (that's what we do when the
1477 * transmission queue is crowded), 86960 informs us number
1478 * of collisions occurred on the last packet on the
1479 * transmission only. Number of collisions on previous
1480 * packets are lost. I have told that the fact is clearly
1481 * stated in the Fujitsu document.
1483 * I considered not to mind it seriously. Collision
1484 * count is not so important, anyway. Any comments? FIXME.
1487 if (fe_inb(sc, FE_DLCR0) & FE_D0_COLLID) {
1489 /* Clear collision flag. */
1490 fe_outb(sc, FE_DLCR0, FE_D0_COLLID);
1492 /* Extract collision count from 86960. */
1493 col = fe_inb(sc, FE_DLCR4);
1494 col = (col & FE_D4_COL) >> FE_D4_COL_SHIFT;
1497 * Status register indicates collisions,
1498 * while the collision count is zero.
1499 * This can happen after multiple packet
1500 * transmission, indicating that one or more
1501 * previous packet(s) had been collided.
1503 * Since the accurate number of collisions
1504 * has been lost, we just guess it as 1;
1505 * Am I too optimistic? FIXME.
1509 sc->sc_if.if_collisions += col;
1511 sc->mibdata.dot3StatsSingleCollisionFrames++;
1513 sc->mibdata.dot3StatsMultipleCollisionFrames++;
1514 sc->mibdata.dot3StatsCollFrequencies[col-1]++;
1518 * Update transmission statistics.
1519 * Be sure to reflect number of excessive collisions.
1521 col = sc->tx_excolls;
1522 IFNET_STAT_INC(&sc->sc_if, opackets, sc->txb_sched - col);
1523 IFNET_STAT_INC(&sc->sc_if, oerrors, col);
1524 IFNET_STAT_INC(&sc->sc_if, collisions, col * 16);
1525 sc->mibdata.dot3StatsExcessiveCollisions += col;
1526 sc->mibdata.dot3StatsCollFrequencies[15] += col;
1530 * The transmitter is no more active.
1531 * Reset output active flag and watchdog timer.
1533 ifq_clr_oactive(&sc->sc_if.if_snd);
1534 sc->sc_if.if_timer = 0;
1537 * If more data is ready to transmit in the buffer, start
1538 * transmitting them. Otherwise keep transmitter idle,
1539 * even if more data is queued. This gives receive
1540 * process a slight priority.
1542 if (sc->txb_count > 0)
1548 * Ethernet interface receiver interrupt.
1551 fe_rint (struct fe_softc * sc, u_char rstat)
1558 * Update statistics if this interrupt is caused by an error.
1559 * Note that, when the system was not sufficiently fast, the
1560 * receive interrupt might not be acknowledged immediately. If
1561 * one or more errornous frames were received before this routine
1562 * was scheduled, they are ignored, and the following error stats
1563 * give less than real values.
1565 if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | FE_D1_SRTPKT)) {
1566 if (rstat & FE_D1_OVRFLO)
1567 sc->mibdata.dot3StatsInternalMacReceiveErrors++;
1568 if (rstat & FE_D1_CRCERR)
1569 sc->mibdata.dot3StatsFCSErrors++;
1570 if (rstat & FE_D1_ALGERR)
1571 sc->mibdata.dot3StatsAlignmentErrors++;
1573 /* The reference MAC receiver defined in 802.3
1574 silently ignores short frames (RUNTs) without
1575 notifying upper layer. RFC 1650 (dot3 MIB) is
1576 based on the 802.3, and it has no stats entry for
1578 if (rstat & FE_D1_SRTPKT)
1579 sc->mibdata.dot3StatsFrameTooShorts++; /* :-) */
1581 IFNET_STAT_INC(&sc->sc_if, ierrors, 1);
1585 * MB86960 has a flag indicating "receive queue empty."
1586 * We just loop, checking the flag, to pull out all received
1589 * We limit the number of iterations to avoid infinite-loop.
1590 * The upper bound is set to unrealistic high value.
1592 for (i = 0; i < FE_MAX_RECV_COUNT * 2; i++) {
1594 /* Stop the iteration if 86960 indicates no packets. */
1595 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP)
1599 * Extract a receive status byte.
1600 * As our 86960 is in 16 bit bus access mode, we have to
1601 * use inw() to get the status byte. The significant
1602 * value is returned in lower 8 bits.
1604 #ifdef FE_8BIT_SUPPORT
1605 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1607 status = fe_inb(sc, FE_BMPR8);
1608 fe_inb(sc, FE_BMPR8);
1613 status = (u_char) fe_inw(sc, FE_BMPR8);
1617 * Extract the packet length.
1618 * It is a sum of a header (14 bytes) and a payload.
1619 * CRC has been stripped off by the 86960.
1621 #ifdef FE_8BIT_SUPPORT
1622 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1624 len = fe_inb(sc, FE_BMPR8);
1625 len |= (fe_inb(sc, FE_BMPR8) << 8);
1630 len = fe_inw(sc, FE_BMPR8);
1634 * AS our 86960 is programed to ignore errored frame,
1635 * we must not see any error indication in the
1636 * receive buffer. So, any error condition is a
1637 * serious error, e.g., out-of-sync of the receive
1640 if ((status & 0xF0) != 0x20 ||
1641 len > ETHER_MAX_LEN - ETHER_CRC_LEN ||
1642 len < ETHER_MIN_LEN - ETHER_CRC_LEN) {
1643 kprintf("fe%d: RX buffer out-of-sync\n", sc->sc_unit);
1644 IFNET_STAT_INC(&sc->sc_if, ierrors, 1);
1645 sc->mibdata.dot3StatsInternalMacReceiveErrors++;
1653 if (fe_get_packet(sc, len) < 0) {
1655 * Negative return from fe_get_packet()
1656 * indicates no available mbuf. We stop
1657 * receiving packets, even if there are more
1658 * in the buffer. We hope we can get more
1661 IFNET_STAT_INC(&sc->sc_if, ierrors, 1);
1662 sc->mibdata.dot3StatsMissedFrames++;
1663 fe_droppacket(sc, len);
1667 /* Successfully received a packet. Update stat. */
1668 IFNET_STAT_INC(&sc->sc_if, ipackets, 1);
1671 /* Maximum number of frames has been received. Something
1672 strange is happening here... */
1673 kprintf("fe%d: unusual receive flood\n", sc->sc_unit);
1674 sc->mibdata.dot3StatsInternalMacReceiveErrors++;
1679 * Ethernet interface interrupt processor
1684 struct fe_softc *sc = arg;
1685 u_char tstat, rstat;
1686 int loop_count = FE_MAX_LOOP;
1688 /* Loop until there are no more new interrupt conditions. */
1689 while (loop_count-- > 0) {
1691 * Get interrupt conditions, masking unneeded flags.
1693 tstat = fe_inb(sc, FE_DLCR0) & FE_TMASK;
1694 rstat = fe_inb(sc, FE_DLCR1) & FE_RMASK;
1695 if (tstat == 0 && rstat == 0)
1699 * Reset the conditions we are acknowledging.
1701 fe_outb(sc, FE_DLCR0, tstat);
1702 fe_outb(sc, FE_DLCR1, rstat);
1705 * Handle transmitter interrupts.
1711 * Handle receiver interrupts
1717 * Update the multicast address filter if it is
1718 * needed and possible. We do it now, because
1719 * we can make sure the transmission buffer is empty,
1720 * and there is a good chance that the receive queue
1721 * is empty. It will minimize the possibility of
1724 if (sc->filter_change &&
1725 sc->txb_count == 0 && sc->txb_sched == 0) {
1727 ifq_clr_oactive(&sc->sc_if.if_snd);
1731 * If it looks like the transmitter can take more data,
1732 * attempt to start output on the interface. This is done
1733 * after handling the receiver interrupt to give the
1734 * receive operation priority.
1736 * BTW, I'm not sure in what case the OACTIVE is on at
1737 * this point. Is the following test redundant?
1739 * No. This routine polls for both transmitter and
1740 * receiver interrupts. 86960 can raise a receiver
1741 * interrupt when the transmission buffer is full.
1743 if (!ifq_is_oactive(&sc->sc_if.if_snd))
1744 if_devstart(&sc->sc_if);
1747 kprintf("fe%d: too many loops\n", sc->sc_unit);
1751 * Process an ioctl request. This code needs some work - it looks
1755 fe_ioctl (struct ifnet * ifp, u_long command, caddr_t data, struct ucred *cr)
1757 struct fe_softc *sc = ifp->if_softc;
1758 struct ifreq *ifr = (struct ifreq *)data;
1764 * Switch interface state between "running" and
1765 * "stopped", reflecting the UP flag.
1767 if (sc->sc_if.if_flags & IFF_UP) {
1768 if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
1771 if ((sc->sc_if.if_flags & IFF_RUNNING) != 0)
1776 * Promiscuous and/or multicast flags may have changed,
1777 * so reprogram the multicast filter and/or receive mode.
1787 * Multicast list has changed; set the hardware filter
1795 /* Let if_media to handle these commands and to call
1797 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
1801 error = ether_ioctl(ifp, command, data);
1808 * Retrieve packet from receive buffer and send to the next level up via
1810 * Returns 0 if success, -1 if error (i.e., mbuf allocation failure).
1813 fe_get_packet (struct fe_softc * sc, u_short len)
1815 struct ether_header *eh;
1819 * NFS wants the data be aligned to the word (4 byte)
1820 * boundary. Ethernet header has 14 bytes. There is a
1823 #define NFS_MAGIC_OFFSET 2
1826 * This function assumes that an Ethernet packet fits in an
1827 * mbuf (with a cluster attached when necessary.) On FreeBSD
1828 * 2.0 for x86, which is the primary target of this driver, an
1829 * mbuf cluster has 4096 bytes, and we are happy. On ancient
1830 * BSDs, such as vanilla 4.3 for 386, a cluster size was 1024,
1831 * however. If the following #error message were printed upon
1832 * compile, you need to rewrite this function.
1834 #if ( MCLBYTES < ETHER_MAX_LEN - ETHER_CRC_LEN + NFS_MAGIC_OFFSET )
1835 #error "Too small MCLBYTES to use fe driver."
1839 * Our strategy has one more problem. There is a policy on
1840 * mbuf cluster allocation. It says that we must have at
1841 * least MINCLSIZE (208 bytes on FreeBSD 2.0 for x86) to
1842 * allocate a cluster. For a packet of a size between
1843 * (MHLEN - 2) to (MINCLSIZE - 2), our code violates the rule...
1844 * On the other hand, the current code is short, simple,
1845 * and fast, however. It does no harmful thing, just waists
1846 * some memory. Any comments? FIXME.
1849 /* Allocate an mbuf with packet header info. */
1850 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1854 /* Attach a cluster if this packet doesn't fit in a normal mbuf. */
1855 if (len > MHLEN - NFS_MAGIC_OFFSET) {
1856 MCLGET(m, MB_DONTWAIT);
1857 if (!(m->m_flags & M_EXT)) {
1863 /* Initialize packet header info. */
1864 m->m_pkthdr.rcvif = &sc->sc_if;
1865 m->m_pkthdr.len = len;
1867 /* Set the length of this packet. */
1870 /* The following silliness is to make NFS happy */
1871 m->m_data += NFS_MAGIC_OFFSET;
1873 /* Get (actually just point to) the header part. */
1874 eh = mtod(m, struct ether_header *);
1877 #ifdef FE_8BIT_SUPPORT
1878 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1880 fe_insb(sc, FE_BMPR8, (u_int8_t *)eh, len);
1885 fe_insw(sc, FE_BMPR8, (u_int16_t *)eh, (len + 1) >> 1);
1888 /* Feed the packet to upper layer. */
1889 sc->sc_if.if_input(&sc->sc_if, m, NULL, -1);
1894 * Write an mbuf chain to the transmission buffer memory using 16 bit PIO.
1895 * Returns number of bytes actually written, including length word.
1897 * If an mbuf chain is too long for an Ethernet frame, it is not sent.
1898 * Packets shorter than Ethernet minimum are legal, and we pad them
1899 * before sending out. An exception is "partial" packets which are
1900 * shorter than mandatory Ethernet header.
1903 fe_write_mbufs (struct fe_softc *sc, struct mbuf *m)
1905 u_short length, len;
1908 u_short savebyte; /* WARNING: Architecture dependent! */
1909 #define NO_PENDING_BYTE 0xFFFF
1911 static u_char padding [ETHER_MIN_LEN - ETHER_CRC_LEN - ETHER_HDR_LEN];
1914 /* First, count up the total number of bytes to copy */
1916 for (mp = m; mp != NULL; mp = mp->m_next)
1917 length += mp->m_len;
1919 /* Check if this matches the one in the packet header. */
1920 if (length != m->m_pkthdr.len) {
1921 kprintf("fe%d: packet length mismatch? (%d/%d)\n", sc->sc_unit,
1922 length, m->m_pkthdr.len);
1925 /* Just use the length value in the packet header. */
1926 length = m->m_pkthdr.len;
1931 * Should never send big packets. If such a packet is passed,
1932 * it should be a bug of upper layer. We just ignore it.
1933 * ... Partial (too short) packets, neither.
1935 if (length < ETHER_HDR_LEN ||
1936 length > ETHER_MAX_LEN - ETHER_CRC_LEN) {
1937 kprintf("fe%d: got an out-of-spec packet (%u bytes) to send\n",
1938 sc->sc_unit, length);
1939 IFNET_STAT_INC(&sc->sc_if, oerrors, 1);
1940 sc->mibdata.dot3StatsInternalMacTransmitErrors++;
1946 * Put the length word for this frame.
1947 * Does 86960 accept odd length? -- Yes.
1948 * Do we need to pad the length to minimum size by ourselves?
1949 * -- Generally yes. But for (or will be) the last
1950 * packet in the transmission buffer, we can skip the
1951 * padding process. It may gain performance slightly. FIXME.
1953 #ifdef FE_8BIT_SUPPORT
1954 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1956 len = max(length, ETHER_MIN_LEN - ETHER_CRC_LEN);
1957 fe_outb(sc, FE_BMPR8, len & 0x00ff);
1958 fe_outb(sc, FE_BMPR8, (len & 0xff00) >> 8);
1963 fe_outw(sc, FE_BMPR8,
1964 max(length, ETHER_MIN_LEN - ETHER_CRC_LEN));
1968 * Update buffer status now.
1969 * Truncate the length up to an even number, since we use outw().
1971 #ifdef FE_8BIT_SUPPORT
1972 if ((sc->proto_dlcr6 & FE_D6_SBW) != FE_D6_SBW_BYTE)
1975 length = (length + 1) & ~1;
1977 sc->txb_free -= FE_DATA_LEN_LEN +
1978 max(length, ETHER_MIN_LEN - ETHER_CRC_LEN);
1982 * Transfer the data from mbuf chain to the transmission buffer.
1983 * MB86960 seems to require that data be transferred as words, and
1984 * only words. So that we require some extra code to patch
1985 * over odd-length mbufs.
1987 #ifdef FE_8BIT_SUPPORT
1988 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
1990 /* 8-bit cards are easy. */
1991 for (mp = m; mp != NULL; mp = mp->m_next) {
1993 fe_outsb(sc, FE_BMPR8, mtod(mp, caddr_t),
2000 /* 16-bit cards are a pain. */
2001 savebyte = NO_PENDING_BYTE;
2002 for (mp = m; mp != NULL; mp = mp->m_next) {
2004 /* Ignore empty mbuf. */
2009 /* Find the actual data to send. */
2010 data = mtod(mp, caddr_t);
2012 /* Finish the last byte. */
2013 if (savebyte != NO_PENDING_BYTE) {
2014 fe_outw(sc, FE_BMPR8, savebyte | (*data << 8));
2017 savebyte = NO_PENDING_BYTE;
2020 /* output contiguous words */
2022 fe_outsw(sc, FE_BMPR8, (u_int16_t *)data,
2028 /* Save a remaining byte, if there is one. */
2033 /* Spit the last byte, if the length is odd. */
2034 if (savebyte != NO_PENDING_BYTE)
2035 fe_outw(sc, FE_BMPR8, savebyte);
2038 /* Pad to the Ethernet minimum length, if the packet is too short. */
2039 if (length < ETHER_MIN_LEN - ETHER_CRC_LEN) {
2040 #ifdef FE_8BIT_SUPPORT
2041 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE)
2043 fe_outsb(sc, FE_BMPR8, padding,
2044 ETHER_MIN_LEN - ETHER_CRC_LEN - length);
2049 fe_outsw(sc, FE_BMPR8, (u_int16_t *)padding,
2050 (ETHER_MIN_LEN - ETHER_CRC_LEN - length) >> 1);
2056 * Compute hash value for an Ethernet address
2059 fe_hash ( u_char * ep )
2061 #define FE_HASH_MAGIC_NUMBER 0xEDB88320L
2063 u_long hash = 0xFFFFFFFFL;
2068 for ( i = ETHER_ADDR_LEN; --i >= 0; ) {
2070 for ( j = 8; --j >= 0; ) {
2073 if ( ( m ^ b ) & 1 ) hash ^= FE_HASH_MAGIC_NUMBER;
2077 return ( ( int )( hash >> 26 ) );
2081 * Compute the multicast address filter from the
2082 * list of multicast addresses we need to listen to.
2084 static struct fe_filter
2085 fe_mcaf ( struct fe_softc *sc )
2088 struct fe_filter filter;
2089 struct ifmultiaddr *ifma;
2091 char ethstr[ETHER_ADDRSTRLEN + 1];
2093 filter = fe_filter_nothing;
2094 TAILQ_FOREACH(ifma, &sc->arpcom.ac_if.if_multiaddrs, ifma_link) {
2095 if (ifma->ifma_addr->sa_family != AF_LINK)
2097 index = fe_hash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
2099 kprintf("fe%d: hash(%s) == %d\n",
2100 sc->sc_unit, kether_ntoa(enm->enm_addrlo, ethstr), index);
2103 filter.data[index >> 3] |= 1 << (index & 7);
2109 * Calculate a new "multicast packet filter" and put the 86960
2110 * receiver in appropriate mode.
2113 fe_setmode (struct fe_softc *sc)
2115 int flags = sc->sc_if.if_flags;
2118 * If the interface is not running, we postpone the update
2119 * process for receive modes and multicast address filter
2120 * until the interface is restarted. It reduces some
2121 * complicated job on maintaining chip states. (Earlier versions
2122 * of this driver had a bug on that point...)
2124 * To complete the trick, fe_init() calls fe_setmode() after
2125 * restarting the interface.
2127 if (!(flags & IFF_RUNNING))
2131 * Promiscuous mode is handled separately.
2133 if (flags & IFF_PROMISC) {
2135 * Program 86960 to receive all packets on the segment
2136 * including those directed to other stations.
2137 * Multicast filter stored in MARs are ignored
2138 * under this setting, so we don't need to update it.
2140 * Promiscuous mode in FreeBSD 2 is used solely by
2141 * BPF, and BPF only listens to valid (no error) packets.
2142 * So, we ignore erroneous ones even in this mode.
2143 * (Older versions of fe driver mistook the point.)
2145 fe_outb(sc, FE_DLCR5,
2146 sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1);
2147 sc->filter_change = 0;
2152 * Turn the chip to the normal (non-promiscuous) mode.
2154 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1);
2157 * Find the new multicast filter value.
2159 if (flags & IFF_ALLMULTI)
2160 sc->filter = fe_filter_all;
2162 sc->filter = fe_mcaf(sc);
2163 sc->filter_change = 1;
2166 * We have to update the multicast filter in the 86960, A.S.A.P.
2168 * Note that the DLC (Data Link Control unit, i.e. transmitter
2169 * and receiver) must be stopped when feeding the filter, and
2170 * DLC trashes all packets in both transmission and receive
2171 * buffers when stopped.
2173 * To reduce the packet loss, we delay the filter update
2174 * process until buffers are empty.
2176 if (sc->txb_sched == 0 && sc->txb_count == 0 &&
2177 !(fe_inb(sc, FE_DLCR1) & FE_D1_PKTRDY)) {
2179 * Buffers are (apparently) empty. Load
2180 * the new filter value into MARs now.
2185 * Buffers are not empty. Mark that we have to update
2186 * the MARs. The new filter will be loaded by feintr()
2193 * Load a new multicast address filter into MARs.
2195 * The caller must have splimp'ed before fe_loadmar.
2196 * This function starts the DLC upon return. So it can be called only
2197 * when the chip is working, i.e., from the driver's point of view, when
2198 * a device is RUNNING. (I mistook the point in previous versions.)
2201 fe_loadmar (struct fe_softc * sc)
2203 /* Stop the DLC (transmitter and receiver). */
2205 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
2208 /* Select register bank 1 for MARs. */
2209 fe_outb(sc, FE_DLCR7, sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP);
2211 /* Copy filter value into the registers. */
2212 fe_outblk(sc, FE_MAR8, sc->filter.data, FE_FILTER_LEN);
2214 /* Restore the bank selection for BMPRs (i.e., runtime registers). */
2215 fe_outb(sc, FE_DLCR7,
2216 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP);
2218 /* Restart the DLC. */
2220 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_ENABLE);
2223 /* We have just updated the filter. */
2224 sc->filter_change = 0;
2227 /* Change the media selection. */
2229 fe_medchange (struct ifnet *ifp)
2231 struct fe_softc *sc = (struct fe_softc *)ifp->if_softc;
2234 /* If_media should not pass any request for a media which this
2235 interface doesn't support. */
2238 for (b = 0; bit2media[b] != 0; b++) {
2239 if (bit2media[b] == sc->media.ifm_media) break;
2241 if (((1 << b) & sc->mbitmap) == 0) {
2242 kprintf("fe%d: got an unsupported media request (0x%x)\n",
2243 sc->sc_unit, sc->media.ifm_media);
2248 /* We don't actually change media when the interface is down.
2249 fe_init() will do the job, instead. Should we also wait
2250 until the transmission buffer being empty? Changing the
2251 media when we are sending a frame will cause two garbages
2252 on wires, one on old media and another on new. FIXME */
2253 if (sc->sc_if.if_flags & IFF_UP) {
2254 if (sc->msel) sc->msel(sc);
2260 /* I don't know how I can support media status callback... FIXME. */
2262 fe_medstat (struct ifnet *ifp __unused, struct ifmediareq *ifmr __unused)