3 * Joerg Sonnenberger <joerg@bec.de>. All rights reserved.
5 * Copyright (c) 1997, 1998-2003
6 * Bill Paul <wpaul@windriver.com>. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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.
35 * $FreeBSD: src/sys/dev/re/if_re.c,v 1.25 2004/06/09 14:34:01 naddy Exp $
36 * $DragonFly: src/sys/dev/netif/re/if_re.c,v 1.96 2008/10/19 09:13:58 sephe Exp $
40 * RealTek 8139C+/8169/8169S/8110S/8168/8111/8101E PCI NIC driver
42 * Written by Bill Paul <wpaul@windriver.com>
43 * Senior Networking Software Engineer
48 * This driver is designed to support RealTek's next generation of
49 * 10/100 and 10/100/1000 PCI ethernet controllers. There are currently
50 * seven devices in this family: the RTL8139C+, the RTL8169, the RTL8169S,
51 * RTL8110S, the RTL8168, the RTL8111 and the RTL8101E.
53 * The 8139C+ is a 10/100 ethernet chip. It is backwards compatible
54 * with the older 8139 family, however it also supports a special
55 * C+ mode of operation that provides several new performance enhancing
56 * features. These include:
58 * o Descriptor based DMA mechanism. Each descriptor represents
59 * a single packet fragment. Data buffers may be aligned on
64 * o TCP/IP checksum offload for both RX and TX
66 * o High and normal priority transmit DMA rings
68 * o VLAN tag insertion and extraction
70 * o TCP large send (segmentation offload)
72 * Like the 8139, the 8139C+ also has a built-in 10/100 PHY. The C+
73 * programming API is fairly straightforward. The RX filtering, EEPROM
74 * access and PHY access is the same as it is on the older 8139 series
77 * The 8169 is a 64-bit 10/100/1000 gigabit ethernet MAC. It has almost the
78 * same programming API and feature set as the 8139C+ with the following
79 * differences and additions:
85 * o GMII and TBI ports/registers for interfacing with copper
88 * o RX and TX DMA rings can have up to 1024 descriptors
89 * (the 8139C+ allows a maximum of 64)
91 * o Slight differences in register layout from the 8139C+
93 * The TX start and timer interrupt registers are at different locations
94 * on the 8169 than they are on the 8139C+. Also, the status word in the
95 * RX descriptor has a slightly different bit layout. The 8169 does not
96 * have a built-in PHY. Most reference boards use a Marvell 88E1000 'Alaska'
99 * The 8169S/8110S 10/100/1000 devices have built-in copper gigE PHYs
100 * (the 'S' stands for 'single-chip'). These devices have the same
101 * programming API as the older 8169, but also have some vendor-specific
102 * registers for the on-board PHY. The 8110S is a LAN-on-motherboard
103 * part designed to be pin-compatible with the RealTek 8100 10/100 chip.
105 * This driver takes advantage of the RX and TX checksum offload and
106 * VLAN tag insertion/extraction features. It also implements TX
107 * interrupt moderation using the timer interrupt registers, which
108 * significantly reduces TX interrupt load. There is also support
109 * for jumbo frames, however the 8169/8169S/8110S can not transmit
110 * jumbo frames larger than 7440, so the max MTU possible with this
111 * driver is 7422 bytes.
116 #include "opt_polling.h"
118 #include <sys/param.h>
120 #include <sys/endian.h>
121 #include <sys/kernel.h>
122 #include <sys/in_cksum.h>
123 #include <sys/interrupt.h>
124 #include <sys/malloc.h>
125 #include <sys/mbuf.h>
126 #include <sys/rman.h>
127 #include <sys/serialize.h>
128 #include <sys/socket.h>
129 #include <sys/sockio.h>
130 #include <sys/sysctl.h>
133 #include <net/ethernet.h>
135 #include <net/ifq_var.h>
136 #include <net/if_arp.h>
137 #include <net/if_dl.h>
138 #include <net/if_media.h>
139 #include <net/if_types.h>
140 #include <net/vlan/if_vlan_var.h>
141 #include <net/vlan/if_vlan_ether.h>
143 #include <netinet/ip.h>
145 #include <dev/netif/mii_layer/mii.h>
146 #include <dev/netif/mii_layer/miivar.h>
148 #include <bus/pci/pcidevs.h>
149 #include <bus/pci/pcireg.h>
150 #include <bus/pci/pcivar.h>
152 /* "device miibus" required. See GENERIC if you get errors here. */
153 #include "miibus_if.h"
155 #include <dev/netif/re/if_rereg.h>
156 #include <dev/netif/re/if_revar.h>
158 #define RE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP)
161 * Various supported device vendors/types and their names.
163 static const struct re_type {
168 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DGE528T,
169 "D-Link DGE-528(T) Gigabit Ethernet Adapter" },
171 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
172 "RealTek 8139C+ 10/100BaseTX" },
174 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8101E,
175 "RealTek 810x PCIe 10/100baseTX" },
177 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8168,
178 "RealTek 8111/8168 PCIe Gigabit Ethernet" },
180 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169,
181 "RealTek 8110/8169 Gigabit Ethernet" },
183 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169SC,
184 "RealTek 8169SC/8110SC Single-chip Gigabit Ethernet" },
186 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_CG_LAPCIGT,
187 "Corega CG-LAPCIGT Gigabit Ethernet" },
189 { PCI_VENDOR_LINKSYS, PCI_PRODUCT_LINKSYS_EG1032,
190 "Linksys EG1032 Gigabit Ethernet" },
192 { PCI_VENDOR_USR2, PCI_PRODUCT_USR2_997902,
193 "US Robotics 997902 Gigabit Ethernet" },
198 static const struct re_hwrev re_hwrevs[] = {
199 { RE_HWREV_8139CPLUS, RE_MACVER_UNKN, ETHERMTU,
200 RE_C_HWCSUM | RE_C_8139CP },
202 { RE_HWREV_8169, RE_MACVER_UNKN, RE_MTU_6K,
203 RE_C_HWCSUM | RE_C_8169 },
205 { RE_HWREV_8110S, RE_MACVER_03, RE_MTU_6K,
206 RE_C_HWCSUM | RE_C_8169 },
208 { RE_HWREV_8169S, RE_MACVER_03, RE_MTU_6K,
209 RE_C_HWCSUM | RE_C_8169 },
211 { RE_HWREV_8169SB, RE_MACVER_04, RE_MTU_6K,
212 RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_8169 },
214 { RE_HWREV_8169SC1, RE_MACVER_05, RE_MTU_6K,
215 RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_8169 },
217 { RE_HWREV_8169SC2, RE_MACVER_06, RE_MTU_6K,
218 RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_8169 },
220 { RE_HWREV_8168B1, RE_MACVER_21, RE_MTU_6K,
221 RE_C_HWIM | RE_C_HWCSUM | RE_C_PHYPMGT },
223 { RE_HWREV_8168B2, RE_MACVER_23, RE_MTU_6K,
224 RE_C_HWIM | RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_AUTOPAD },
226 { RE_HWREV_8168B3, RE_MACVER_23, RE_MTU_6K,
227 RE_C_HWIM | RE_C_HWCSUM | RE_C_PHYPMGT | RE_C_AUTOPAD },
229 { RE_HWREV_8168C, RE_MACVER_29, RE_MTU_6K,
230 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
231 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
233 { RE_HWREV_8168CP, RE_MACVER_2B, RE_MTU_6K,
234 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
235 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
237 { RE_HWREV_8168D, RE_MACVER_2A, RE_MTU_9K,
238 RE_C_HWIM | RE_C_HWCSUM | RE_C_MAC2 | RE_C_PHYPMGT |
239 RE_C_AUTOPAD | RE_C_CONTIGRX | RE_C_STOP_RXTX },
241 { RE_HWREV_8100E, RE_MACVER_UNKN, ETHERMTU,
244 { RE_HWREV_8101E1, RE_MACVER_16, ETHERMTU,
247 { RE_HWREV_8101E2, RE_MACVER_16, ETHERMTU,
250 { RE_HWREV_8102E, RE_MACVER_15, ETHERMTU,
251 RE_C_HWCSUM | RE_C_MAC2 | RE_C_AUTOPAD | RE_C_STOP_RXTX },
253 { RE_HWREV_8102EL, RE_MACVER_15, ETHERMTU,
254 RE_C_HWCSUM | RE_C_MAC2 | RE_C_AUTOPAD | RE_C_STOP_RXTX },
256 { RE_HWREV_NULL, 0, 0, 0 }
259 static int re_probe(device_t);
260 static int re_attach(device_t);
261 static int re_detach(device_t);
262 static int re_suspend(device_t);
263 static int re_resume(device_t);
264 static void re_shutdown(device_t);
266 static void re_dma_map_addr(void *, bus_dma_segment_t *, int, int);
267 static void re_dma_map_desc(void *, bus_dma_segment_t *, int,
269 static int re_allocmem(device_t);
270 static void re_freemem(device_t);
271 static void re_freebufmem(struct re_softc *, int, int);
272 static int re_encap(struct re_softc *, struct mbuf **, int *);
273 static int re_newbuf_std(struct re_softc *, int, int);
274 static int re_newbuf_jumbo(struct re_softc *, int, int);
275 static void re_setup_rxdesc(struct re_softc *, int);
276 static int re_rx_list_init(struct re_softc *);
277 static int re_tx_list_init(struct re_softc *);
278 static int re_rxeof(struct re_softc *);
279 static int re_txeof(struct re_softc *);
280 static int re_tx_collect(struct re_softc *);
281 static void re_intr(void *);
282 static void re_tick(void *);
283 static void re_tick_serialized(void *);
285 static void re_start(struct ifnet *);
286 static int re_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
287 static void re_init(void *);
288 static void re_stop(struct re_softc *);
289 static void re_watchdog(struct ifnet *);
290 static int re_ifmedia_upd(struct ifnet *);
291 static void re_ifmedia_sts(struct ifnet *, struct ifmediareq *);
293 static void re_eeprom_putbyte(struct re_softc *, int);
294 static void re_eeprom_getword(struct re_softc *, int, u_int16_t *);
295 static void re_read_eeprom(struct re_softc *, caddr_t, int, int);
296 static void re_get_eewidth(struct re_softc *);
298 static int re_gmii_readreg(device_t, int, int);
299 static int re_gmii_writereg(device_t, int, int, int);
301 static int re_miibus_readreg(device_t, int, int);
302 static int re_miibus_writereg(device_t, int, int, int);
303 static void re_miibus_statchg(device_t);
305 static void re_setmulti(struct re_softc *);
306 static void re_reset(struct re_softc *, int);
307 static void re_get_eaddr(struct re_softc *, uint8_t *);
309 static void re_setup_hw_im(struct re_softc *);
310 static void re_setup_sim_im(struct re_softc *);
311 static void re_disable_hw_im(struct re_softc *);
312 static void re_disable_sim_im(struct re_softc *);
313 static void re_config_imtype(struct re_softc *, int);
314 static void re_setup_intr(struct re_softc *, int, int);
316 static int re_sysctl_hwtime(SYSCTL_HANDLER_ARGS, int *);
317 static int re_sysctl_rxtime(SYSCTL_HANDLER_ARGS);
318 static int re_sysctl_txtime(SYSCTL_HANDLER_ARGS);
319 static int re_sysctl_simtime(SYSCTL_HANDLER_ARGS);
320 static int re_sysctl_imtype(SYSCTL_HANDLER_ARGS);
322 static int re_jpool_alloc(struct re_softc *);
323 static void re_jpool_free(struct re_softc *);
324 static struct re_jbuf *re_jbuf_alloc(struct re_softc *);
325 static void re_jbuf_free(void *);
326 static void re_jbuf_ref(void *);
329 static int re_diag(struct re_softc *);
332 #ifdef DEVICE_POLLING
333 static void re_poll(struct ifnet *ifp, enum poll_cmd cmd, int count);
336 static device_method_t re_methods[] = {
337 /* Device interface */
338 DEVMETHOD(device_probe, re_probe),
339 DEVMETHOD(device_attach, re_attach),
340 DEVMETHOD(device_detach, re_detach),
341 DEVMETHOD(device_suspend, re_suspend),
342 DEVMETHOD(device_resume, re_resume),
343 DEVMETHOD(device_shutdown, re_shutdown),
346 DEVMETHOD(bus_print_child, bus_generic_print_child),
347 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
350 DEVMETHOD(miibus_readreg, re_miibus_readreg),
351 DEVMETHOD(miibus_writereg, re_miibus_writereg),
352 DEVMETHOD(miibus_statchg, re_miibus_statchg),
357 static driver_t re_driver = {
360 sizeof(struct re_softc)
363 static devclass_t re_devclass;
365 DECLARE_DUMMY_MODULE(if_re);
366 DRIVER_MODULE(if_re, pci, re_driver, re_devclass, 0, 0);
367 DRIVER_MODULE(if_re, cardbus, re_driver, re_devclass, 0, 0);
368 DRIVER_MODULE(miibus, re, miibus_driver, miibus_devclass, 0, 0);
370 static int re_rx_desc_count = RE_RX_DESC_CNT_DEF;
371 static int re_tx_desc_count = RE_TX_DESC_CNT_DEF;
373 TUNABLE_INT("hw.re.rx_desc_count", &re_rx_desc_count);
374 TUNABLE_INT("hw.re.tx_desc_count", &re_tx_desc_count);
377 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) | (x))
380 CSR_WRITE_1(sc, RE_EECMD, CSR_READ_1(sc, RE_EECMD) & ~(x))
383 re_free_rxchain(struct re_softc *sc)
385 if (sc->re_head != NULL) {
386 m_freem(sc->re_head);
387 sc->re_head = sc->re_tail = NULL;
392 * Send a read command and address to the EEPROM, check for ACK.
395 re_eeprom_putbyte(struct re_softc *sc, int addr)
399 d = addr | (RE_9346_READ << sc->re_eewidth);
402 * Feed in each bit and strobe the clock.
404 for (i = 1 << (sc->re_eewidth + 3); i; i >>= 1) {
406 EE_SET(RE_EE_DATAIN);
408 EE_CLR(RE_EE_DATAIN);
418 * Read a word of data stored in the EEPROM at address 'addr.'
421 re_eeprom_getword(struct re_softc *sc, int addr, uint16_t *dest)
427 * Send address of word we want to read.
429 re_eeprom_putbyte(sc, addr);
432 * Start reading bits from EEPROM.
434 for (i = 0x8000; i != 0; i >>= 1) {
437 if (CSR_READ_1(sc, RE_EECMD) & RE_EE_DATAOUT)
447 * Read a sequence of words from the EEPROM.
450 re_read_eeprom(struct re_softc *sc, caddr_t dest, int off, int cnt)
453 uint16_t word = 0, *ptr;
455 CSR_SETBIT_1(sc, RE_EECMD, RE_EEMODE_PROGRAM);
458 for (i = 0; i < cnt; i++) {
459 CSR_SETBIT_1(sc, RE_EECMD, RE_EE_SEL);
460 re_eeprom_getword(sc, off + i, &word);
461 CSR_CLRBIT_1(sc, RE_EECMD, RE_EE_SEL);
462 ptr = (uint16_t *)(dest + (i * 2));
466 CSR_CLRBIT_1(sc, RE_EECMD, RE_EEMODE_PROGRAM);
470 re_get_eewidth(struct re_softc *sc)
475 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1);
476 if (re_did != 0x8129)
481 re_gmii_readreg(device_t dev, int phy, int reg)
483 struct re_softc *sc = device_get_softc(dev);
490 /* Let the rgephy driver read the GMEDIASTAT register */
492 if (reg == RE_GMEDIASTAT)
493 return(CSR_READ_1(sc, RE_GMEDIASTAT));
495 CSR_WRITE_4(sc, RE_PHYAR, reg << 16);
498 for (i = 0; i < RE_TIMEOUT; i++) {
499 rval = CSR_READ_4(sc, RE_PHYAR);
500 if (rval & RE_PHYAR_BUSY)
505 if (i == RE_TIMEOUT) {
506 device_printf(dev, "PHY read failed\n");
510 return(rval & RE_PHYAR_PHYDATA);
514 re_gmii_writereg(device_t dev, int phy, int reg, int data)
516 struct re_softc *sc = device_get_softc(dev);
520 CSR_WRITE_4(sc, RE_PHYAR,
521 (reg << 16) | (data & RE_PHYAR_PHYDATA) | RE_PHYAR_BUSY);
524 for (i = 0; i < RE_TIMEOUT; i++) {
525 rval = CSR_READ_4(sc, RE_PHYAR);
526 if ((rval & RE_PHYAR_BUSY) == 0)
532 device_printf(dev, "PHY write failed\n");
538 re_miibus_readreg(device_t dev, int phy, int reg)
540 struct re_softc *sc = device_get_softc(dev);
542 uint16_t re8139_reg = 0;
544 if (!RE_IS_8139CP(sc)) {
545 rval = re_gmii_readreg(dev, phy, reg);
549 /* Pretend the internal PHY is only at address 0 */
555 re8139_reg = RE_BMCR;
558 re8139_reg = RE_BMSR;
561 re8139_reg = RE_ANAR;
564 re8139_reg = RE_ANER;
567 re8139_reg = RE_LPAR;
573 * Allow the rlphy driver to read the media status
574 * register. If we have a link partner which does not
575 * support NWAY, this is the register which will tell
576 * us the results of parallel detection.
579 return(CSR_READ_1(sc, RE_MEDIASTAT));
581 device_printf(dev, "bad phy register\n");
584 rval = CSR_READ_2(sc, re8139_reg);
585 if (re8139_reg == RE_BMCR) {
586 /* 8139C+ has different bit layout. */
587 rval &= ~(BMCR_LOOP | BMCR_ISO);
593 re_miibus_writereg(device_t dev, int phy, int reg, int data)
595 struct re_softc *sc= device_get_softc(dev);
596 u_int16_t re8139_reg = 0;
598 if (!RE_IS_8139CP(sc))
599 return(re_gmii_writereg(dev, phy, reg, data));
601 /* Pretend the internal PHY is only at address 0 */
607 re8139_reg = RE_BMCR;
608 /* 8139C+ has different bit layout. */
609 data &= ~(BMCR_LOOP | BMCR_ISO);
612 re8139_reg = RE_BMSR;
615 re8139_reg = RE_ANAR;
618 re8139_reg = RE_ANER;
621 re8139_reg = RE_LPAR;
627 device_printf(dev, "bad phy register\n");
630 CSR_WRITE_2(sc, re8139_reg, data);
635 re_miibus_statchg(device_t dev)
640 * Program the 64-bit multicast hash filter.
643 re_setmulti(struct re_softc *sc)
645 struct ifnet *ifp = &sc->arpcom.ac_if;
647 uint32_t hashes[2] = { 0, 0 };
648 struct ifmultiaddr *ifma;
652 rxfilt = CSR_READ_4(sc, RE_RXCFG);
654 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
655 rxfilt |= RE_RXCFG_RX_MULTI;
656 CSR_WRITE_4(sc, RE_RXCFG, rxfilt);
657 CSR_WRITE_4(sc, RE_MAR0, 0xFFFFFFFF);
658 CSR_WRITE_4(sc, RE_MAR4, 0xFFFFFFFF);
662 /* first, zot all the existing hash bits */
663 CSR_WRITE_4(sc, RE_MAR0, 0);
664 CSR_WRITE_4(sc, RE_MAR4, 0);
666 /* now program new ones */
667 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
668 if (ifma->ifma_addr->sa_family != AF_LINK)
670 h = ether_crc32_be(LLADDR((struct sockaddr_dl *)
671 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
673 hashes[0] |= (1 << h);
675 hashes[1] |= (1 << (h - 32));
680 rxfilt |= RE_RXCFG_RX_MULTI;
682 rxfilt &= ~RE_RXCFG_RX_MULTI;
684 CSR_WRITE_4(sc, RE_RXCFG, rxfilt);
687 * For some unfathomable reason, RealTek decided to reverse
688 * the order of the multicast hash registers in the PCI Express
689 * parts. This means we have to write the hash pattern in reverse
690 * order for those devices.
692 if (sc->re_caps & RE_C_PCIE) {
693 CSR_WRITE_4(sc, RE_MAR0, bswap32(hashes[0]));
694 CSR_WRITE_4(sc, RE_MAR4, bswap32(hashes[1]));
696 CSR_WRITE_4(sc, RE_MAR0, hashes[0]);
697 CSR_WRITE_4(sc, RE_MAR4, hashes[1]);
702 re_reset(struct re_softc *sc, int running)
706 if ((sc->re_caps & RE_C_STOP_RXTX) && running) {
707 CSR_WRITE_1(sc, RE_COMMAND,
708 RE_CMD_STOPREQ | RE_CMD_TX_ENB | RE_CMD_RX_ENB);
712 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_RESET);
714 for (i = 0; i < RE_TIMEOUT; i++) {
716 if ((CSR_READ_1(sc, RE_COMMAND) & RE_CMD_RESET) == 0)
720 if_printf(&sc->arpcom.ac_if, "reset never completed!\n");
725 * The following routine is designed to test for a defect on some
726 * 32-bit 8169 cards. Some of these NICs have the REQ64# and ACK64#
727 * lines connected to the bus, however for a 32-bit only card, they
728 * should be pulled high. The result of this defect is that the
729 * NIC will not work right if you plug it into a 64-bit slot: DMA
730 * operations will be done with 64-bit transfers, which will fail
731 * because the 64-bit data lines aren't connected.
733 * There's no way to work around this (short of talking a soldering
734 * iron to the board), however we can detect it. The method we use
735 * here is to put the NIC into digital loopback mode, set the receiver
736 * to promiscuous mode, and then try to send a frame. We then compare
737 * the frame data we sent to what was received. If the data matches,
738 * then the NIC is working correctly, otherwise we know the user has
739 * a defective NIC which has been mistakenly plugged into a 64-bit PCI
740 * slot. In the latter case, there's no way the NIC can work correctly,
741 * so we print out a message on the console and abort the device attach.
745 re_diag(struct re_softc *sc)
747 struct ifnet *ifp = &sc->arpcom.ac_if;
749 struct ether_header *eh;
750 struct re_desc *cur_rx;
753 int total_len, i, error = 0, phyaddr;
754 uint8_t dst[ETHER_ADDR_LEN] = { 0x00, 'h', 'e', 'l', 'l', 'o' };
755 uint8_t src[ETHER_ADDR_LEN] = { 0x00, 'w', 'o', 'r', 'l', 'd' };
757 /* Allocate a single mbuf */
759 MGETHDR(m0, MB_DONTWAIT, MT_DATA);
764 * Initialize the NIC in test mode. This sets the chip up
765 * so that it can send and receive frames, but performs the
766 * following special functions:
767 * - Puts receiver in promiscuous mode
768 * - Enables digital loopback mode
769 * - Leaves interrupts turned off
772 ifp->if_flags |= IFF_PROMISC;
773 sc->re_flags |= RE_F_TESTMODE;
775 sc->re_flags |= RE_F_LINKED;
776 if (!RE_IS_8139CP(sc))
781 re_miibus_writereg(sc->re_dev, phyaddr, MII_BMCR, BMCR_RESET);
782 for (i = 0; i < RE_TIMEOUT; i++) {
783 status = re_miibus_readreg(sc->re_dev, phyaddr, MII_BMCR);
784 if (!(status & BMCR_RESET))
788 re_miibus_writereg(sc->re_dev, phyaddr, MII_BMCR, BMCR_LOOP);
789 CSR_WRITE_2(sc, RE_ISR, RE_INTRS_DIAG);
793 /* Put some data in the mbuf */
795 eh = mtod(m0, struct ether_header *);
796 bcopy (dst, eh->ether_dhost, ETHER_ADDR_LEN);
797 bcopy (src, eh->ether_shost, ETHER_ADDR_LEN);
798 eh->ether_type = htons(ETHERTYPE_IP);
799 m0->m_pkthdr.len = m0->m_len = ETHER_MIN_LEN - ETHER_CRC_LEN;
802 * Queue the packet, start transmission.
803 * Note: ifq_handoff() ultimately calls re_start() for us.
806 CSR_WRITE_2(sc, RE_ISR, 0xFFFF);
807 error = ifq_handoff(ifp, m0, NULL);
814 /* Wait for it to propagate through the chip */
817 for (i = 0; i < RE_TIMEOUT; i++) {
818 status = CSR_READ_2(sc, RE_ISR);
819 CSR_WRITE_2(sc, RE_ISR, status);
820 if ((status & (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK)) ==
821 (RE_ISR_TIMEOUT_EXPIRED|RE_ISR_RX_OK))
826 if (i == RE_TIMEOUT) {
827 if_printf(ifp, "diagnostic failed to receive packet "
828 "in loopback mode\n");
834 * The packet should have been dumped into the first
835 * entry in the RX DMA ring. Grab it from there.
838 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag,
839 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_POSTREAD);
840 bus_dmamap_sync(sc->re_ldata.re_mtag, sc->re_ldata.re_rx_dmamap[0],
841 BUS_DMASYNC_POSTWRITE);
842 bus_dmamap_unload(sc->re_ldata.re_mtag, sc->re_ldata.re_rx_dmamap[0]);
844 m0 = sc->re_ldata.re_rx_mbuf[0];
845 sc->re_ldata.re_rx_mbuf[0] = NULL;
846 eh = mtod(m0, struct ether_header *);
848 cur_rx = &sc->re_ldata.re_rx_list[0];
849 total_len = RE_RXBYTES(cur_rx);
850 rxstat = le32toh(cur_rx->re_cmdstat);
852 if (total_len != ETHER_MIN_LEN) {
853 if_printf(ifp, "diagnostic failed, received short packet\n");
858 /* Test that the received packet data matches what we sent. */
860 if (bcmp(eh->ether_dhost, dst, ETHER_ADDR_LEN) ||
861 bcmp(eh->ether_shost, &src, ETHER_ADDR_LEN) ||
862 be16toh(eh->ether_type) != ETHERTYPE_IP) {
863 if_printf(ifp, "WARNING, DMA FAILURE!\n");
864 if_printf(ifp, "expected TX data: %6D/%6D/0x%x\n",
865 dst, ":", src, ":", ETHERTYPE_IP);
866 if_printf(ifp, "received RX data: %6D/%6D/0x%x\n",
867 eh->ether_dhost, ":", eh->ether_shost, ":",
868 ntohs(eh->ether_type));
869 if_printf(ifp, "You may have a defective 32-bit NIC plugged "
870 "into a 64-bit PCI slot.\n");
871 if_printf(ifp, "Please re-install the NIC in a 32-bit slot "
872 "for proper operation.\n");
873 if_printf(ifp, "Read the re(4) man page for more details.\n");
878 /* Turn interface off, release resources */
880 sc->re_flags &= ~(RE_F_LINKED | RE_F_TESTMODE);
881 ifp->if_flags &= ~IFF_PROMISC;
891 * Probe for a RealTek 8139C+/8169/8110 chip. Check the PCI vendor and device
892 * IDs against our list and return a device name if we find a match.
895 re_probe(device_t dev)
897 const struct re_type *t;
898 const struct re_hwrev *hw_rev;
901 uint32_t hwrev, macmode, txcfg;
902 uint16_t vendor, product;
904 vendor = pci_get_vendor(dev);
905 product = pci_get_device(dev);
908 * Only attach to rev.3 of the Linksys EG1032 adapter.
909 * Rev.2 is supported by sk(4).
911 if (vendor == PCI_VENDOR_LINKSYS &&
912 product == PCI_PRODUCT_LINKSYS_EG1032 &&
913 pci_get_subdevice(dev) != PCI_SUBDEVICE_LINKSYS_EG1032_REV3)
916 for (t = re_devs; t->re_name != NULL; t++) {
917 if (product == t->re_did && vendor == t->re_vid)
922 * Check if we found a RealTek device.
924 if (t->re_name == NULL)
928 * Temporarily map the I/O space so we can read the chip ID register.
930 sc = kmalloc(sizeof(*sc), M_TEMP, M_WAITOK | M_ZERO);
932 sc->re_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
934 if (sc->re_res == NULL) {
935 device_printf(dev, "couldn't map ports/memory\n");
940 sc->re_btag = rman_get_bustag(sc->re_res);
941 sc->re_bhandle = rman_get_bushandle(sc->re_res);
943 txcfg = CSR_READ_4(sc, RE_TXCFG);
944 hwrev = txcfg & RE_TXCFG_HWREV;
945 macmode = txcfg & RE_TXCFG_MACMODE;
946 bus_release_resource(dev, SYS_RES_IOPORT, RE_PCI_LOIO, sc->re_res);
950 * and continue matching for the specific chip...
952 for (hw_rev = re_hwrevs; hw_rev->re_hwrev != RE_HWREV_NULL; hw_rev++) {
953 if (hw_rev->re_hwrev == hwrev) {
954 sc = device_get_softc(dev);
956 sc->re_hwrev = hw_rev->re_hwrev;
957 sc->re_macver = hw_rev->re_macver;
958 sc->re_caps = hw_rev->re_caps;
959 sc->re_maxmtu = hw_rev->re_maxmtu;
960 sc->re_swcsum_lim = RE_SWCSUM_UNLIMITED;
963 * Apply chip property fixup
965 switch (sc->re_hwrev) {
967 sc->re_swcsum_lim = RE_SWCSUM_LIM_8169;
969 case RE_HWREV_8101E1:
970 case RE_HWREV_8101E2:
972 sc->re_macver = RE_MACVER_11;
973 else if (macmode == 0x200000)
974 sc->re_macver = RE_MACVER_12;
977 case RE_HWREV_8102EL:
979 sc->re_macver = RE_MACVER_13;
980 else if (macmode == 0x100000)
981 sc->re_macver = RE_MACVER_14;
983 case RE_HWREV_8168B2:
984 case RE_HWREV_8168B3:
986 sc->re_macver = RE_MACVER_22;
990 sc->re_macver = RE_MACVER_24;
991 else if (macmode == 0x200000)
992 sc->re_macver = RE_MACVER_25;
993 else if (macmode == 0x300000)
994 sc->re_macver = RE_MACVER_27;
996 case RE_HWREV_8168CP:
998 sc->re_macver = RE_MACVER_26;
999 else if (macmode == 0x100000)
1000 sc->re_macver = RE_MACVER_28;
1003 if (pci_get_pciecap_ptr(dev) != 0)
1004 sc->re_caps |= RE_C_PCIE;
1006 device_set_desc(dev, t->re_name);
1010 device_printf(dev, "unknown hwrev 0x%08x, macmode 0x%08x\n",
1016 re_dma_map_desc(void *xarg, bus_dma_segment_t *segs, int nsegs,
1017 bus_size_t mapsize, int error)
1019 struct re_dmaload_arg *arg = xarg;
1025 if (nsegs > arg->re_nsegs) {
1030 arg->re_nsegs = nsegs;
1031 for (i = 0; i < nsegs; ++i)
1032 arg->re_segs[i] = segs[i];
1036 * Map a single buffer address.
1040 re_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1047 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
1049 *addr = segs->ds_addr;
1053 re_allocmem(device_t dev)
1055 struct re_softc *sc = device_get_softc(dev);
1059 * Allocate list data
1061 sc->re_ldata.re_tx_mbuf =
1062 kmalloc(sc->re_tx_desc_cnt * sizeof(struct mbuf *),
1063 M_DEVBUF, M_ZERO | M_WAITOK);
1065 sc->re_ldata.re_rx_mbuf =
1066 kmalloc(sc->re_rx_desc_cnt * sizeof(struct mbuf *),
1067 M_DEVBUF, M_ZERO | M_WAITOK);
1069 sc->re_ldata.re_rx_paddr =
1070 kmalloc(sc->re_rx_desc_cnt * sizeof(bus_addr_t),
1071 M_DEVBUF, M_ZERO | M_WAITOK);
1073 sc->re_ldata.re_tx_dmamap =
1074 kmalloc(sc->re_tx_desc_cnt * sizeof(bus_dmamap_t),
1075 M_DEVBUF, M_ZERO | M_WAITOK);
1077 sc->re_ldata.re_rx_dmamap =
1078 kmalloc(sc->re_rx_desc_cnt * sizeof(bus_dmamap_t),
1079 M_DEVBUF, M_ZERO | M_WAITOK);
1082 * Allocate the parent bus DMA tag appropriate for PCI.
1084 error = bus_dma_tag_create(NULL, /* parent */
1085 1, 0, /* alignment, boundary */
1086 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
1087 BUS_SPACE_MAXADDR, /* highaddr */
1088 NULL, NULL, /* filter, filterarg */
1089 MAXBSIZE, RE_MAXSEGS, /* maxsize, nsegments */
1090 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
1091 BUS_DMA_ALLOCNOW, /* flags */
1092 &sc->re_parent_tag);
1094 device_printf(dev, "could not allocate parent dma tag\n");
1098 /* Allocate tag for TX descriptor list. */
1099 error = bus_dma_tag_create(sc->re_parent_tag,
1101 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
1103 RE_TX_LIST_SZ(sc), 1, RE_TX_LIST_SZ(sc),
1105 &sc->re_ldata.re_tx_list_tag);
1107 device_printf(dev, "could not allocate TX ring dma tag\n");
1111 /* Allocate DMA'able memory for the TX ring */
1112 error = bus_dmamem_alloc(sc->re_ldata.re_tx_list_tag,
1113 (void **)&sc->re_ldata.re_tx_list,
1114 BUS_DMA_WAITOK | BUS_DMA_ZERO,
1115 &sc->re_ldata.re_tx_list_map);
1117 device_printf(dev, "could not allocate TX ring\n");
1118 bus_dma_tag_destroy(sc->re_ldata.re_tx_list_tag);
1119 sc->re_ldata.re_tx_list_tag = NULL;
1123 /* Load the map for the TX ring. */
1124 error = bus_dmamap_load(sc->re_ldata.re_tx_list_tag,
1125 sc->re_ldata.re_tx_list_map,
1126 sc->re_ldata.re_tx_list, RE_TX_LIST_SZ(sc),
1127 re_dma_map_addr, &sc->re_ldata.re_tx_list_addr,
1130 device_printf(dev, "could not get address of TX ring\n");
1131 bus_dmamem_free(sc->re_ldata.re_tx_list_tag,
1132 sc->re_ldata.re_tx_list,
1133 sc->re_ldata.re_tx_list_map);
1134 bus_dma_tag_destroy(sc->re_ldata.re_tx_list_tag);
1135 sc->re_ldata.re_tx_list_tag = NULL;
1139 /* Allocate tag for RX descriptor list. */
1140 error = bus_dma_tag_create(sc->re_parent_tag,
1142 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
1144 RE_RX_LIST_SZ(sc), 1, RE_RX_LIST_SZ(sc),
1146 &sc->re_ldata.re_rx_list_tag);
1148 device_printf(dev, "could not allocate RX ring dma tag\n");
1152 /* Allocate DMA'able memory for the RX ring */
1153 error = bus_dmamem_alloc(sc->re_ldata.re_rx_list_tag,
1154 (void **)&sc->re_ldata.re_rx_list,
1155 BUS_DMA_WAITOK | BUS_DMA_ZERO,
1156 &sc->re_ldata.re_rx_list_map);
1158 device_printf(dev, "could not allocate RX ring\n");
1159 bus_dma_tag_destroy(sc->re_ldata.re_rx_list_tag);
1160 sc->re_ldata.re_rx_list_tag = NULL;
1164 /* Load the map for the RX ring. */
1165 error = bus_dmamap_load(sc->re_ldata.re_rx_list_tag,
1166 sc->re_ldata.re_rx_list_map,
1167 sc->re_ldata.re_rx_list, RE_RX_LIST_SZ(sc),
1168 re_dma_map_addr, &sc->re_ldata.re_rx_list_addr,
1171 device_printf(dev, "could not get address of RX ring\n");
1172 bus_dmamem_free(sc->re_ldata.re_rx_list_tag,
1173 sc->re_ldata.re_rx_list,
1174 sc->re_ldata.re_rx_list_map);
1175 bus_dma_tag_destroy(sc->re_ldata.re_rx_list_tag);
1176 sc->re_ldata.re_rx_list_tag = NULL;
1180 /* Allocate map for RX/TX mbufs. */
1181 error = bus_dma_tag_create(sc->re_parent_tag,
1183 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
1185 RE_FRAMELEN_MAX, RE_MAXSEGS, MCLBYTES,
1187 &sc->re_ldata.re_mtag);
1189 device_printf(dev, "could not allocate buf dma tag\n");
1193 /* Create spare DMA map for RX */
1194 error = bus_dmamap_create(sc->re_ldata.re_mtag, 0,
1195 &sc->re_ldata.re_rx_spare);
1197 device_printf(dev, "can't create spare DMA map for RX\n");
1198 bus_dma_tag_destroy(sc->re_ldata.re_mtag);
1199 sc->re_ldata.re_mtag = NULL;
1203 /* Create DMA maps for TX buffers */
1204 for (i = 0; i < sc->re_tx_desc_cnt; i++) {
1205 error = bus_dmamap_create(sc->re_ldata.re_mtag, 0,
1206 &sc->re_ldata.re_tx_dmamap[i]);
1208 device_printf(dev, "can't create DMA map for TX buf\n");
1209 re_freebufmem(sc, i, 0);
1214 /* Create DMA maps for RX buffers */
1215 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
1216 error = bus_dmamap_create(sc->re_ldata.re_mtag, 0,
1217 &sc->re_ldata.re_rx_dmamap[i]);
1219 device_printf(dev, "can't create DMA map for RX buf\n");
1220 re_freebufmem(sc, sc->re_tx_desc_cnt, i);
1225 /* Create jumbo buffer pool for RX if required */
1226 if (sc->re_caps & RE_C_CONTIGRX) {
1227 error = re_jpool_alloc(sc);
1230 /* Disable jumbo frame support */
1231 sc->re_maxmtu = ETHERMTU;
1238 re_freebufmem(struct re_softc *sc, int tx_cnt, int rx_cnt)
1242 /* Destroy all the RX and TX buffer maps */
1243 if (sc->re_ldata.re_mtag) {
1244 for (i = 0; i < tx_cnt; i++) {
1245 bus_dmamap_destroy(sc->re_ldata.re_mtag,
1246 sc->re_ldata.re_tx_dmamap[i]);
1248 for (i = 0; i < rx_cnt; i++) {
1249 bus_dmamap_destroy(sc->re_ldata.re_mtag,
1250 sc->re_ldata.re_rx_dmamap[i]);
1252 bus_dmamap_destroy(sc->re_ldata.re_mtag,
1253 sc->re_ldata.re_rx_spare);
1254 bus_dma_tag_destroy(sc->re_ldata.re_mtag);
1255 sc->re_ldata.re_mtag = NULL;
1260 re_freemem(device_t dev)
1262 struct re_softc *sc = device_get_softc(dev);
1264 /* Unload and free the RX DMA ring memory and map */
1265 if (sc->re_ldata.re_rx_list_tag) {
1266 bus_dmamap_unload(sc->re_ldata.re_rx_list_tag,
1267 sc->re_ldata.re_rx_list_map);
1268 bus_dmamem_free(sc->re_ldata.re_rx_list_tag,
1269 sc->re_ldata.re_rx_list,
1270 sc->re_ldata.re_rx_list_map);
1271 bus_dma_tag_destroy(sc->re_ldata.re_rx_list_tag);
1274 /* Unload and free the TX DMA ring memory and map */
1275 if (sc->re_ldata.re_tx_list_tag) {
1276 bus_dmamap_unload(sc->re_ldata.re_tx_list_tag,
1277 sc->re_ldata.re_tx_list_map);
1278 bus_dmamem_free(sc->re_ldata.re_tx_list_tag,
1279 sc->re_ldata.re_tx_list,
1280 sc->re_ldata.re_tx_list_map);
1281 bus_dma_tag_destroy(sc->re_ldata.re_tx_list_tag);
1284 /* Free RX/TX buf DMA stuffs */
1285 re_freebufmem(sc, sc->re_tx_desc_cnt, sc->re_rx_desc_cnt);
1287 /* Unload and free the stats buffer and map */
1288 if (sc->re_ldata.re_stag) {
1289 bus_dmamap_unload(sc->re_ldata.re_stag,
1290 sc->re_ldata.re_rx_list_map);
1291 bus_dmamem_free(sc->re_ldata.re_stag,
1292 sc->re_ldata.re_stats,
1293 sc->re_ldata.re_smap);
1294 bus_dma_tag_destroy(sc->re_ldata.re_stag);
1297 if (sc->re_caps & RE_C_CONTIGRX)
1300 if (sc->re_parent_tag)
1301 bus_dma_tag_destroy(sc->re_parent_tag);
1303 if (sc->re_ldata.re_tx_mbuf != NULL)
1304 kfree(sc->re_ldata.re_tx_mbuf, M_DEVBUF);
1305 if (sc->re_ldata.re_rx_mbuf != NULL)
1306 kfree(sc->re_ldata.re_rx_mbuf, M_DEVBUF);
1307 if (sc->re_ldata.re_rx_paddr != NULL)
1308 kfree(sc->re_ldata.re_rx_paddr, M_DEVBUF);
1309 if (sc->re_ldata.re_tx_dmamap != NULL)
1310 kfree(sc->re_ldata.re_tx_dmamap, M_DEVBUF);
1311 if (sc->re_ldata.re_rx_dmamap != NULL)
1312 kfree(sc->re_ldata.re_rx_dmamap, M_DEVBUF);
1316 * Attach the interface. Allocate softc structures, do ifmedia
1317 * setup and ethernet/BPF attach.
1320 re_attach(device_t dev)
1322 struct re_softc *sc = device_get_softc(dev);
1324 uint8_t eaddr[ETHER_ADDR_LEN];
1325 int error = 0, rid, qlen;
1327 callout_init(&sc->re_timer);
1330 if (RE_IS_8139CP(sc)) {
1331 sc->re_rx_desc_cnt = RE_RX_DESC_CNT_8139CP;
1332 sc->re_tx_desc_cnt = RE_TX_DESC_CNT_8139CP;
1334 sc->re_rx_desc_cnt = re_rx_desc_count;
1335 if (sc->re_rx_desc_cnt > RE_RX_DESC_CNT_MAX)
1336 sc->re_rx_desc_cnt = RE_RX_DESC_CNT_MAX;
1338 sc->re_tx_desc_cnt = re_tx_desc_count;
1339 if (sc->re_tx_desc_cnt > RE_TX_DESC_CNT_MAX)
1340 sc->re_tx_desc_cnt = RE_TX_DESC_CNT_MAX;
1343 qlen = RE_IFQ_MAXLEN;
1344 if (sc->re_tx_desc_cnt > qlen)
1345 qlen = sc->re_tx_desc_cnt;
1347 sc->re_rxbuf_size = MCLBYTES;
1348 sc->re_newbuf = re_newbuf_std;
1350 sc->re_tx_time = 5; /* 125us */
1351 sc->re_rx_time = 2; /* 50us */
1352 if (sc->re_caps & RE_C_PCIE)
1353 sc->re_sim_time = 75; /* 75us */
1355 sc->re_sim_time = 125; /* 125us */
1356 sc->re_imtype = RE_IMTYPE_SIM; /* simulated interrupt moderation */
1357 re_config_imtype(sc, sc->re_imtype);
1359 sysctl_ctx_init(&sc->re_sysctl_ctx);
1360 sc->re_sysctl_tree = SYSCTL_ADD_NODE(&sc->re_sysctl_ctx,
1361 SYSCTL_STATIC_CHILDREN(_hw),
1363 device_get_nameunit(dev),
1365 if (sc->re_sysctl_tree == NULL) {
1366 device_printf(dev, "can't add sysctl node\n");
1370 SYSCTL_ADD_INT(&sc->re_sysctl_ctx,
1371 SYSCTL_CHILDREN(sc->re_sysctl_tree), OID_AUTO,
1372 "rx_desc_count", CTLFLAG_RD, &sc->re_rx_desc_cnt,
1373 0, "RX desc count");
1374 SYSCTL_ADD_INT(&sc->re_sysctl_ctx,
1375 SYSCTL_CHILDREN(sc->re_sysctl_tree), OID_AUTO,
1376 "tx_desc_count", CTLFLAG_RD, &sc->re_tx_desc_cnt,
1377 0, "TX desc count");
1378 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1379 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1380 OID_AUTO, "sim_time",
1381 CTLTYPE_INT | CTLFLAG_RW,
1382 sc, 0, re_sysctl_simtime, "I",
1383 "Simulated interrupt moderation time (usec).");
1384 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1385 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1387 CTLTYPE_INT | CTLFLAG_RW,
1388 sc, 0, re_sysctl_imtype, "I",
1389 "Interrupt moderation type -- "
1390 "0:disable, 1:simulated, "
1391 "2:hardware(if supported)");
1392 if (sc->re_caps & RE_C_HWIM) {
1393 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1394 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1395 OID_AUTO, "hw_rxtime",
1396 CTLTYPE_INT | CTLFLAG_RW,
1397 sc, 0, re_sysctl_rxtime, "I",
1398 "Hardware interrupt moderation time "
1400 SYSCTL_ADD_PROC(&sc->re_sysctl_ctx,
1401 SYSCTL_CHILDREN(sc->re_sysctl_tree),
1402 OID_AUTO, "hw_txtime",
1403 CTLTYPE_INT | CTLFLAG_RW,
1404 sc, 0, re_sysctl_txtime, "I",
1405 "Hardware interrupt moderation time "
1409 #ifndef BURN_BRIDGES
1411 * Handle power management nonsense.
1414 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
1415 uint32_t membase, irq;
1417 /* Save important PCI config data. */
1418 membase = pci_read_config(dev, RE_PCI_LOMEM, 4);
1419 irq = pci_read_config(dev, PCIR_INTLINE, 4);
1421 /* Reset the power state. */
1422 device_printf(dev, "chip is in D%d power mode "
1423 "-- setting to D0\n", pci_get_powerstate(dev));
1425 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
1427 /* Restore PCI config data. */
1428 pci_write_config(dev, RE_PCI_LOMEM, membase, 4);
1429 pci_write_config(dev, PCIR_INTLINE, irq, 4);
1433 * Map control/status registers.
1435 pci_enable_busmaster(dev);
1438 sc->re_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
1441 if (sc->re_res == NULL) {
1442 device_printf(dev, "couldn't map ports\n");
1447 sc->re_btag = rman_get_bustag(sc->re_res);
1448 sc->re_bhandle = rman_get_bushandle(sc->re_res);
1450 /* Allocate interrupt */
1452 sc->re_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
1453 RF_SHAREABLE | RF_ACTIVE);
1455 if (sc->re_irq == NULL) {
1456 device_printf(dev, "couldn't map interrupt\n");
1461 /* Reset the adapter. */
1464 if (RE_IS_8139CP(sc)) {
1465 sc->re_bus_speed = 33; /* XXX */
1466 } else if (sc->re_caps & RE_C_PCIE) {
1467 sc->re_bus_speed = 125;
1471 cfg2 = CSR_READ_1(sc, RE_CFG2);
1472 switch (cfg2 & RE_CFG2_PCICLK_MASK) {
1473 case RE_CFG2_PCICLK_33MHZ:
1474 sc->re_bus_speed = 33;
1476 case RE_CFG2_PCICLK_66MHZ:
1477 sc->re_bus_speed = 66;
1480 device_printf(dev, "unknown bus speed, assume 33MHz\n");
1481 sc->re_bus_speed = 33;
1484 if (cfg2 & RE_CFG2_PCI64)
1485 sc->re_caps |= RE_C_PCI64;
1487 device_printf(dev, "Hardware rev. 0x%08x; MAC ver. 0x%02x; "
1489 sc->re_hwrev, sc->re_macver,
1490 (sc->re_caps & RE_C_PCIE) ?
1491 "-E" : ((sc->re_caps & RE_C_PCI64) ? "64" : "32"),
1496 * DO NOT try to adjust config1 and config5 which was spotted in
1497 * Realtek's Linux drivers. It will _permanently_ damage certain
1498 * cards EEPROM, e.g. one of my 8168B (0x38000000) card ...
1501 re_get_eaddr(sc, eaddr);
1503 if (!RE_IS_8139CP(sc)) {
1504 /* Set RX length mask */
1505 sc->re_rxlenmask = RE_RDESC_STAT_GFRAGLEN;
1506 sc->re_txstart = RE_GTXSTART;
1508 /* Set RX length mask */
1509 sc->re_rxlenmask = RE_RDESC_STAT_FRAGLEN;
1510 sc->re_txstart = RE_TXSTART;
1513 /* Allocate DMA stuffs */
1514 error = re_allocmem(dev);
1519 * Apply some magic PCI settings from Realtek ...
1521 if (RE_IS_8169(sc)) {
1522 CSR_WRITE_1(sc, 0x82, 1);
1523 pci_write_config(dev, PCIR_CACHELNSZ, 0x8, 1);
1525 pci_write_config(dev, PCIR_LATTIMER, 0x40, 1);
1527 if (sc->re_caps & RE_C_MAC2) {
1529 * Following part is extracted from Realtek BSD driver v176.
1530 * However, this does _not_ make much/any sense:
1531 * 8168C's PCI Express device control is located at 0x78,
1532 * so the reading from 0x79 (higher part of 0x78) and setting
1533 * the 4~6bits intend to enlarge the "max read request size"
1534 * (we will do it). The content of the rest part of this
1535 * register is not meaningful to other PCI registers, so
1536 * writing the value to 0x54 could be completely wrong.
1537 * 0x80 is the lower part of PCI Express device status, non-
1538 * reserved bits are RW1C, writing 0 to them will not have
1539 * any effect at all.
1544 val = pci_read_config(dev, 0x79, 1);
1545 val = (val & ~0x70) | 0x50;
1546 pci_write_config(dev, 0x54, val, 1);
1547 pci_write_config(dev, 0x80, 0, 1);
1552 * Apply some PHY fixup from Realtek ...
1554 if (sc->re_hwrev == RE_HWREV_8110S) {
1555 CSR_WRITE_1(sc, 0x82, 1);
1556 re_miibus_writereg(dev, 1, 0xb, 0);
1558 if (sc->re_caps & RE_C_PHYPMGT) {
1560 re_miibus_writereg(dev, 1, 0x1f, 0);
1561 re_miibus_writereg(dev, 1, 0xe, 0);
1565 if (mii_phy_probe(dev, &sc->re_miibus,
1566 re_ifmedia_upd, re_ifmedia_sts)) {
1567 device_printf(dev, "MII without any phy!\n");
1572 ifp = &sc->arpcom.ac_if;
1574 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
1575 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
1576 ifp->if_ioctl = re_ioctl;
1577 ifp->if_start = re_start;
1578 #ifdef DEVICE_POLLING
1579 ifp->if_poll = re_poll;
1581 ifp->if_watchdog = re_watchdog;
1582 ifp->if_init = re_init;
1583 if (!RE_IS_8139CP(sc)) /* XXX */
1584 ifp->if_baudrate = 1000000000;
1586 ifp->if_baudrate = 100000000;
1587 ifq_set_maxlen(&ifp->if_snd, qlen);
1588 ifq_set_ready(&ifp->if_snd);
1590 ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING;
1591 if (sc->re_caps & RE_C_HWCSUM)
1592 ifp->if_capabilities |= IFCAP_HWCSUM;
1594 ifp->if_capenable = ifp->if_capabilities;
1595 if (ifp->if_capabilities & IFCAP_HWCSUM)
1596 ifp->if_hwassist = RE_CSUM_FEATURES;
1598 ifp->if_hwassist = 0;
1601 * Call MI attach routine.
1603 ether_ifattach(ifp, eaddr, NULL);
1607 * Perform hardware diagnostic on the original RTL8169.
1608 * Some 32-bit cards were incorrectly wired and would
1609 * malfunction if plugged into a 64-bit slot.
1611 if (sc->re_hwrev == RE_HWREV_8169) {
1612 lwkt_serialize_enter(ifp->if_serializer);
1613 error = re_diag(sc);
1614 lwkt_serialize_exit(ifp->if_serializer);
1617 device_printf(dev, "hardware diagnostic failure\n");
1618 ether_ifdetach(ifp);
1622 #endif /* RE_DIAG */
1624 /* Hook interrupt last to avoid having to lock softc */
1625 error = bus_setup_intr(dev, sc->re_irq, INTR_MPSAFE, re_intr, sc,
1626 &sc->re_intrhand, ifp->if_serializer);
1629 device_printf(dev, "couldn't set up irq\n");
1630 ether_ifdetach(ifp);
1634 ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->re_irq));
1635 KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus);
1645 * Shutdown hardware and free up resources. This can be called any
1646 * time after the mutex has been initialized. It is called in both
1647 * the error case in attach and the normal detach case so it needs
1648 * to be careful about only freeing resources that have actually been
1652 re_detach(device_t dev)
1654 struct re_softc *sc = device_get_softc(dev);
1655 struct ifnet *ifp = &sc->arpcom.ac_if;
1657 /* These should only be active if attach succeeded */
1658 if (device_is_attached(dev)) {
1659 lwkt_serialize_enter(ifp->if_serializer);
1661 bus_teardown_intr(dev, sc->re_irq, sc->re_intrhand);
1662 lwkt_serialize_exit(ifp->if_serializer);
1664 ether_ifdetach(ifp);
1667 device_delete_child(dev, sc->re_miibus);
1668 bus_generic_detach(dev);
1670 if (sc->re_sysctl_tree != NULL)
1671 sysctl_ctx_free(&sc->re_sysctl_ctx);
1674 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->re_irq);
1676 bus_release_resource(dev, SYS_RES_IOPORT, RE_PCI_LOIO,
1680 /* Free DMA stuffs */
1687 re_setup_rxdesc(struct re_softc *sc, int idx)
1693 paddr = sc->re_ldata.re_rx_paddr[idx];
1694 d = &sc->re_ldata.re_rx_list[idx];
1696 d->re_bufaddr_lo = htole32(RE_ADDR_LO(paddr));
1697 d->re_bufaddr_hi = htole32(RE_ADDR_HI(paddr));
1699 cmdstat = sc->re_rxbuf_size | RE_RDESC_CMD_OWN;
1700 if (idx == (sc->re_rx_desc_cnt - 1))
1701 cmdstat |= RE_RDESC_CMD_EOR;
1702 d->re_cmdstat = htole32(cmdstat);
1706 re_newbuf_std(struct re_softc *sc, int idx, int init)
1708 struct re_dmaload_arg arg;
1709 bus_dma_segment_t seg;
1714 m = m_getcl(init ? MB_WAIT : MB_DONTWAIT, MT_DATA, M_PKTHDR);
1719 if_printf(&sc->arpcom.ac_if, "m_getcl failed\n");
1725 m->m_len = m->m_pkthdr.len = MCLBYTES;
1729 * Some re(4) chips(e.g. RTL8101E) need address of the receive buffer
1730 * to be 8-byte aligned, so don't call m_adj(m, ETHER_ALIGN) here.
1735 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag,
1736 sc->re_ldata.re_rx_spare, m,
1737 re_dma_map_desc, &arg, BUS_DMA_NOWAIT);
1738 if (error || arg.re_nsegs == 0) {
1740 if_printf(&sc->arpcom.ac_if, "too many segments?!\n");
1741 bus_dmamap_unload(sc->re_ldata.re_mtag,
1742 sc->re_ldata.re_rx_spare);
1748 if_printf(&sc->arpcom.ac_if, "can't load RX mbuf\n");
1756 bus_dmamap_sync(sc->re_ldata.re_mtag,
1757 sc->re_ldata.re_rx_dmamap[idx],
1758 BUS_DMASYNC_POSTREAD);
1759 bus_dmamap_unload(sc->re_ldata.re_mtag,
1760 sc->re_ldata.re_rx_dmamap[idx]);
1762 sc->re_ldata.re_rx_mbuf[idx] = m;
1763 sc->re_ldata.re_rx_paddr[idx] = seg.ds_addr;
1765 map = sc->re_ldata.re_rx_dmamap[idx];
1766 sc->re_ldata.re_rx_dmamap[idx] = sc->re_ldata.re_rx_spare;
1767 sc->re_ldata.re_rx_spare = map;
1769 re_setup_rxdesc(sc, idx);
1774 re_newbuf_jumbo(struct re_softc *sc, int idx, int init)
1777 struct re_jbuf *jbuf;
1780 MGETHDR(m, init ? MB_WAIT : MB_DONTWAIT, MT_DATA);
1784 if_printf(&sc->arpcom.ac_if, "MGETHDR failed\n");
1791 jbuf = re_jbuf_alloc(sc);
1797 if_printf(&sc->arpcom.ac_if, "jpool is empty\n");
1804 m->m_ext.ext_arg = jbuf;
1805 m->m_ext.ext_buf = jbuf->re_buf;
1806 m->m_ext.ext_free = re_jbuf_free;
1807 m->m_ext.ext_ref = re_jbuf_ref;
1808 m->m_ext.ext_size = sc->re_rxbuf_size;
1810 m->m_data = m->m_ext.ext_buf;
1811 m->m_flags |= M_EXT;
1812 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
1816 * Some re(4) chips(e.g. RTL8101E) need address of the receive buffer
1817 * to be 8-byte aligned, so don't call m_adj(m, ETHER_ALIGN) here.
1820 sc->re_ldata.re_rx_mbuf[idx] = m;
1821 sc->re_ldata.re_rx_paddr[idx] = jbuf->re_paddr;
1823 re_setup_rxdesc(sc, idx);
1828 re_tx_list_init(struct re_softc *sc)
1830 bzero(sc->re_ldata.re_tx_list, RE_TX_LIST_SZ(sc));
1832 /* Flush the TX descriptors */
1833 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag,
1834 sc->re_ldata.re_tx_list_map, BUS_DMASYNC_PREWRITE);
1836 sc->re_ldata.re_tx_prodidx = 0;
1837 sc->re_ldata.re_tx_considx = 0;
1838 sc->re_ldata.re_tx_free = sc->re_tx_desc_cnt;
1844 re_rx_list_init(struct re_softc *sc)
1848 bzero(sc->re_ldata.re_rx_list, RE_RX_LIST_SZ(sc));
1850 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
1851 error = sc->re_newbuf(sc, i, 1);
1856 /* Flush the RX descriptors */
1857 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag,
1858 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_PREWRITE);
1860 sc->re_ldata.re_rx_prodidx = 0;
1861 sc->re_head = sc->re_tail = NULL;
1866 #define RE_IP4_PACKET 0x1
1867 #define RE_TCP_PACKET 0x2
1868 #define RE_UDP_PACKET 0x4
1870 static __inline uint8_t
1871 re_packet_type(struct re_softc *sc, uint32_t rxstat, uint32_t rxctrl)
1873 uint8_t packet_type = 0;
1875 if (sc->re_caps & RE_C_MAC2) {
1876 if (rxctrl & RE_RDESC_CTL_PROTOIP4)
1877 packet_type |= RE_IP4_PACKET;
1879 if (rxstat & RE_RDESC_STAT_PROTOID)
1880 packet_type |= RE_IP4_PACKET;
1882 if (RE_TCPPKT(rxstat))
1883 packet_type |= RE_TCP_PACKET;
1884 else if (RE_UDPPKT(rxstat))
1885 packet_type |= RE_UDP_PACKET;
1890 * RX handler for C+ and 8169. For the gigE chips, we support
1891 * the reception of jumbo frames that have been fragmented
1892 * across multiple 2K mbuf cluster buffers.
1895 re_rxeof(struct re_softc *sc)
1897 struct ifnet *ifp = &sc->arpcom.ac_if;
1899 struct re_desc *cur_rx;
1900 uint32_t rxstat, rxctrl;
1901 int i, total_len, rx = 0;
1902 struct mbuf_chain chain[MAXCPU];
1904 /* Invalidate the descriptor memory */
1906 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag,
1907 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_POSTREAD);
1909 ether_input_chain_init(chain);
1911 for (i = sc->re_ldata.re_rx_prodidx;
1912 RE_OWN(&sc->re_ldata.re_rx_list[i]) == 0; RE_RXDESC_INC(sc, i)) {
1913 cur_rx = &sc->re_ldata.re_rx_list[i];
1914 m = sc->re_ldata.re_rx_mbuf[i];
1915 total_len = RE_RXBYTES(cur_rx);
1916 rxstat = le32toh(cur_rx->re_cmdstat);
1917 rxctrl = le32toh(cur_rx->re_control);
1922 if (sc->re_flags & RE_F_USE_JPOOL)
1923 KKASSERT(rxstat & RE_RDESC_STAT_EOF);
1926 if ((rxstat & RE_RDESC_STAT_EOF) == 0) {
1927 if (sc->re_flags & RE_F_DROP_RXFRAG) {
1928 re_setup_rxdesc(sc, i);
1932 if (sc->re_newbuf(sc, i, 0)) {
1933 /* Drop upcoming fragments */
1934 sc->re_flags |= RE_F_DROP_RXFRAG;
1938 m->m_len = MCLBYTES;
1939 if (sc->re_head == NULL) {
1940 sc->re_head = sc->re_tail = m;
1942 sc->re_tail->m_next = m;
1946 } else if (sc->re_flags & RE_F_DROP_RXFRAG) {
1948 * Last fragment of a multi-fragment packet.
1950 * Since error already happened, this fragment
1951 * must be dropped as well as the fragment chain.
1953 re_setup_rxdesc(sc, i);
1954 re_free_rxchain(sc);
1955 sc->re_flags &= ~RE_F_DROP_RXFRAG;
1960 * NOTE: for the 8139C+, the frame length field
1961 * is always 12 bits in size, but for the gigE chips,
1962 * it is 13 bits (since the max RX frame length is 16K).
1963 * Unfortunately, all 32 bits in the status word
1964 * were already used, so to make room for the extra
1965 * length bit, RealTek took out the 'frame alignment
1966 * error' bit and shifted the other status bits
1967 * over one slot. The OWN, EOR, FS and LS bits are
1968 * still in the same places. We have already extracted
1969 * the frame length and checked the OWN bit, so rather
1970 * than using an alternate bit mapping, we shift the
1971 * status bits one space to the right so we can evaluate
1972 * them using the 8169 status as though it was in the
1973 * same format as that of the 8139C+.
1975 if (!RE_IS_8139CP(sc))
1978 if (rxstat & RE_RDESC_STAT_RXERRSUM) {
1981 * If this is part of a multi-fragment packet,
1982 * discard all the pieces.
1984 re_free_rxchain(sc);
1985 re_setup_rxdesc(sc, i);
1990 * If allocating a replacement mbuf fails,
1991 * reload the current one.
1994 if (sc->re_newbuf(sc, i, 0)) {
1999 if (sc->re_head != NULL) {
2000 m->m_len = total_len % MCLBYTES;
2002 * Special case: if there's 4 bytes or less
2003 * in this buffer, the mbuf can be discarded:
2004 * the last 4 bytes is the CRC, which we don't
2005 * care about anyway.
2007 if (m->m_len <= ETHER_CRC_LEN) {
2008 sc->re_tail->m_len -=
2009 (ETHER_CRC_LEN - m->m_len);
2012 m->m_len -= ETHER_CRC_LEN;
2013 sc->re_tail->m_next = m;
2016 sc->re_head = sc->re_tail = NULL;
2017 m->m_pkthdr.len = total_len - ETHER_CRC_LEN;
2019 m->m_pkthdr.len = m->m_len =
2020 (total_len - ETHER_CRC_LEN);
2024 m->m_pkthdr.rcvif = ifp;
2026 /* Do RX checksumming if enabled */
2028 if (ifp->if_capenable & IFCAP_RXCSUM) {
2029 uint8_t packet_type;
2031 packet_type = re_packet_type(sc, rxstat, rxctrl);
2033 /* Check IP header checksum */
2034 if (packet_type & RE_IP4_PACKET) {
2035 m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
2036 if ((rxstat & RE_RDESC_STAT_IPSUMBAD) == 0)
2037 m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
2040 /* Check TCP/UDP checksum */
2041 if (((packet_type & RE_TCP_PACKET) &&
2042 (rxstat & RE_RDESC_STAT_TCPSUMBAD) == 0) ||
2043 ((packet_type & RE_UDP_PACKET) &&
2044 (rxstat & RE_RDESC_STAT_UDPSUMBAD) == 0)) {
2045 m->m_pkthdr.csum_flags |=
2046 CSUM_DATA_VALID|CSUM_PSEUDO_HDR|
2047 CSUM_FRAG_NOT_CHECKED;
2048 m->m_pkthdr.csum_data = 0xffff;
2052 if (rxctrl & RE_RDESC_CTL_HASTAG) {
2053 m->m_flags |= M_VLANTAG;
2054 m->m_pkthdr.ether_vlantag =
2055 be16toh((rxctrl & RE_RDESC_CTL_TAGDATA));
2057 ether_input_chain(ifp, m, chain);
2060 ether_input_dispatch(chain);
2062 /* Flush the RX DMA ring */
2064 bus_dmamap_sync(sc->re_ldata.re_rx_list_tag,
2065 sc->re_ldata.re_rx_list_map, BUS_DMASYNC_PREWRITE);
2067 sc->re_ldata.re_rx_prodidx = i;
2072 #undef RE_IP4_PACKET
2073 #undef RE_TCP_PACKET
2074 #undef RE_UDP_PACKET
2077 re_tx_collect(struct re_softc *sc)
2079 struct ifnet *ifp = &sc->arpcom.ac_if;
2083 /* Invalidate the TX descriptor list */
2084 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag,
2085 sc->re_ldata.re_tx_list_map, BUS_DMASYNC_POSTREAD);
2087 for (idx = sc->re_ldata.re_tx_considx;
2088 sc->re_ldata.re_tx_free < sc->re_tx_desc_cnt;
2089 RE_TXDESC_INC(sc, idx)) {
2090 txstat = le32toh(sc->re_ldata.re_tx_list[idx].re_cmdstat);
2091 if (txstat & RE_TDESC_CMD_OWN)
2096 sc->re_ldata.re_tx_list[idx].re_bufaddr_lo = 0;
2099 * We only stash mbufs in the last descriptor
2100 * in a fragment chain, which also happens to
2101 * be the only place where the TX status bits
2104 if (txstat & RE_TDESC_CMD_EOF) {
2105 m_freem(sc->re_ldata.re_tx_mbuf[idx]);
2106 sc->re_ldata.re_tx_mbuf[idx] = NULL;
2107 bus_dmamap_unload(sc->re_ldata.re_mtag,
2108 sc->re_ldata.re_tx_dmamap[idx]);
2109 if (txstat & (RE_TDESC_STAT_EXCESSCOL|
2110 RE_TDESC_STAT_COLCNT))
2111 ifp->if_collisions++;
2112 if (txstat & RE_TDESC_STAT_TXERRSUM)
2117 sc->re_ldata.re_tx_free++;
2119 sc->re_ldata.re_tx_considx = idx;
2125 re_txeof(struct re_softc *sc)
2127 struct ifnet *ifp = &sc->arpcom.ac_if;
2130 tx = re_tx_collect(sc);
2132 /* There is enough free TX descs */
2133 if (sc->re_ldata.re_tx_free > RE_TXDESC_SPARE)
2134 ifp->if_flags &= ~IFF_OACTIVE;
2137 * Some chips will ignore a second TX request issued while an
2138 * existing transmission is in progress. If the transmitter goes
2139 * idle but there are still packets waiting to be sent, we need
2140 * to restart the channel here to flush them out. This only seems
2141 * to be required with the PCIe devices.
2143 if (sc->re_ldata.re_tx_free < sc->re_tx_desc_cnt)
2144 CSR_WRITE_1(sc, sc->re_txstart, RE_TXSTART_START);
2154 struct re_softc *sc = xsc;
2156 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
2157 re_tick_serialized(xsc);
2158 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
2162 re_tick_serialized(void *xsc)
2164 struct re_softc *sc = xsc;
2165 struct ifnet *ifp = &sc->arpcom.ac_if;
2166 struct mii_data *mii;
2168 ASSERT_SERIALIZED(ifp->if_serializer);
2170 mii = device_get_softc(sc->re_miibus);
2172 if (sc->re_flags & RE_F_LINKED) {
2173 if (!(mii->mii_media_status & IFM_ACTIVE))
2174 sc->re_flags &= ~RE_F_LINKED;
2176 if (mii->mii_media_status & IFM_ACTIVE &&
2177 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
2178 sc->re_flags |= RE_F_LINKED;
2179 if (!ifq_is_empty(&ifp->if_snd))
2184 callout_reset(&sc->re_timer, hz, re_tick, sc);
2187 #ifdef DEVICE_POLLING
2190 re_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
2192 struct re_softc *sc = ifp->if_softc;
2194 ASSERT_SERIALIZED(ifp->if_serializer);
2198 /* disable interrupts */
2199 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
2202 case POLL_DEREGISTER:
2203 /* enable interrupts */
2204 re_setup_intr(sc, 1, sc->re_imtype);
2208 sc->rxcycles = count;
2212 if (!ifq_is_empty(&ifp->if_snd))
2215 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */
2218 status = CSR_READ_2(sc, RE_ISR);
2219 if (status == 0xffff)
2222 CSR_WRITE_2(sc, RE_ISR, status);
2225 * XXX check behaviour on receiver stalls.
2228 if (status & RE_ISR_SYSTEM_ERR)
2234 #endif /* DEVICE_POLLING */
2239 struct re_softc *sc = arg;
2240 struct ifnet *ifp = &sc->arpcom.ac_if;
2244 ASSERT_SERIALIZED(ifp->if_serializer);
2246 if ((sc->re_flags & RE_F_SUSPENDED) ||
2247 (ifp->if_flags & IFF_RUNNING) == 0)
2252 status = CSR_READ_2(sc, RE_ISR);
2253 /* If the card has gone away the read returns 0xffff. */
2254 if (status == 0xffff)
2257 CSR_WRITE_2(sc, RE_ISR, status);
2259 if ((status & sc->re_intrs) == 0)
2262 if (status & (sc->re_rx_ack | RE_ISR_RX_ERR))
2265 if (status & (sc->re_tx_ack | RE_ISR_TX_ERR))
2268 if (status & RE_ISR_SYSTEM_ERR)
2271 if (status & RE_ISR_LINKCHG) {
2272 callout_stop(&sc->re_timer);
2273 re_tick_serialized(sc);
2277 if (sc->re_imtype == RE_IMTYPE_SIM) {
2278 if ((sc->re_flags & RE_F_TIMER_INTR)) {
2280 re_setup_intr(sc, 1, RE_IMTYPE_NONE);
2282 CSR_WRITE_4(sc, RE_TIMERCNT, 1); /* reload */
2283 } else if (tx | rx) {
2284 re_setup_intr(sc, 1, RE_IMTYPE_SIM);
2288 if (tx && !ifq_is_empty(&ifp->if_snd))
2293 re_encap(struct re_softc *sc, struct mbuf **m_head, int *idx0)
2295 struct ifnet *ifp = &sc->arpcom.ac_if;
2297 struct re_dmaload_arg arg;
2298 bus_dma_segment_t segs[RE_MAXSEGS];
2300 int error, maxsegs, idx, i;
2301 struct re_desc *d, *tx_ring;
2302 uint32_t cmd_csum, ctl_csum, vlantag;
2304 KASSERT(sc->re_ldata.re_tx_free > RE_TXDESC_SPARE,
2305 ("not enough free TX desc\n"));
2308 map = sc->re_ldata.re_tx_dmamap[*idx0];
2311 * Set up checksum offload. Note: checksum offload bits must
2312 * appear in all descriptors of a multi-descriptor transmit
2313 * attempt. (This is according to testing done with an 8169
2314 * chip. I'm not sure if this is a requirement or a bug.)
2316 cmd_csum = ctl_csum = 0;
2317 if (m->m_pkthdr.csum_flags & CSUM_IP) {
2318 cmd_csum |= RE_TDESC_CMD_IPCSUM;
2319 ctl_csum |= RE_TDESC_CTL_IPCSUM;
2321 if (m->m_pkthdr.csum_flags & CSUM_TCP) {
2322 cmd_csum |= RE_TDESC_CMD_TCPCSUM;
2323 ctl_csum |= RE_TDESC_CTL_TCPCSUM;
2325 if (m->m_pkthdr.csum_flags & CSUM_UDP) {
2326 cmd_csum |= RE_TDESC_CMD_UDPCSUM;
2327 ctl_csum |= RE_TDESC_CTL_UDPCSUM;
2330 /* For MAC2 chips, csum flags are set on re_control */
2331 if (sc->re_caps & RE_C_MAC2)
2336 if (m->m_pkthdr.len > sc->re_swcsum_lim &&
2337 (m->m_pkthdr.csum_flags & (CSUM_DELAY_IP | CSUM_DELAY_DATA))) {
2338 struct ether_header *eh;
2342 m = m_pullup(m, sizeof(struct ether_header *));
2347 eh = mtod(m, struct ether_header *);
2350 if (eh->ether_type == ETHERTYPE_VLAN)
2351 offset = sizeof(struct ether_vlan_header);
2353 offset = sizeof(struct ether_header);
2355 m = m_pullup(m, offset + sizeof(struct ip *));
2360 ip = (struct ip *)(mtod(m, uint8_t *) + offset);
2362 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
2365 offset += IP_VHL_HL(ip->ip_vhl) << 2;
2366 csum = in_cksum_skip(m, ntohs(ip->ip_len), offset);
2367 if (m->m_pkthdr.csum_flags & CSUM_UDP && csum == 0)
2369 offset += m->m_pkthdr.csum_data; /* checksum offset */
2370 *(u_short *)(m->m_data + offset) = csum;
2372 m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
2374 if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) {
2376 if (ip->ip_vhl == IP_VHL_BORING) {
2377 ip->ip_sum = in_cksum_hdr(ip);
2380 in_cksum(m, IP_VHL_HL(ip->ip_vhl) << 2);
2382 m->m_pkthdr.csum_flags &= ~CSUM_DELAY_IP;
2384 *m_head = m; /* 'm' may be changed by above two m_pullup() */
2386 /* Clear hardware CSUM flags */
2387 cmd_csum = ctl_csum = 0;
2390 if ((sc->re_caps & RE_C_AUTOPAD) == 0) {
2392 * With some of the RealTek chips, using the checksum offload
2393 * support in conjunction with the autopadding feature results
2394 * in the transmission of corrupt frames. For example, if we
2395 * need to send a really small IP fragment that's less than 60
2396 * bytes in size, and IP header checksumming is enabled, the
2397 * resulting ethernet frame that appears on the wire will
2398 * have garbled payload. To work around this, if TX checksum
2399 * offload is enabled, we always manually pad short frames out
2400 * to the minimum ethernet frame size.
2402 * Note: this appears unnecessary for TCP, and doing it for TCP
2403 * with PCIe adapters seems to result in bad checksums.
2405 if ((m->m_pkthdr.csum_flags &
2406 (CSUM_DELAY_IP | CSUM_DELAY_DATA)) &&
2407 (m->m_pkthdr.csum_flags & CSUM_TCP) == 0 &&
2408 m->m_pkthdr.len < RE_MIN_FRAMELEN) {
2409 error = m_devpad(m, RE_MIN_FRAMELEN);
2416 if (m->m_flags & M_VLANTAG) {
2417 vlantag = htobe16(m->m_pkthdr.ether_vlantag) |
2418 RE_TDESC_CTL_INSTAG;
2421 maxsegs = sc->re_ldata.re_tx_free;
2422 if (maxsegs > RE_MAXSEGS)
2423 maxsegs = RE_MAXSEGS;
2425 arg.re_nsegs = maxsegs;
2427 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag, map, m,
2428 re_dma_map_desc, &arg, BUS_DMA_NOWAIT);
2429 if (error && error != EFBIG) {
2430 if_printf(ifp, "can't map mbuf (error %d)\n", error);
2435 * Too many segments to map, coalesce into a single mbuf
2437 if (!error && arg.re_nsegs == 0) {
2438 bus_dmamap_unload(sc->re_ldata.re_mtag, map);
2444 m_new = m_defrag(m, MB_DONTWAIT);
2445 if (m_new == NULL) {
2446 if_printf(ifp, "can't defrag TX mbuf\n");
2450 *m_head = m = m_new;
2453 arg.re_nsegs = maxsegs;
2455 error = bus_dmamap_load_mbuf(sc->re_ldata.re_mtag, map, m,
2456 re_dma_map_desc, &arg,
2458 if (error || arg.re_nsegs == 0) {
2460 bus_dmamap_unload(sc->re_ldata.re_mtag, map);
2463 if_printf(ifp, "can't map mbuf (error %d)\n", error);
2467 bus_dmamap_sync(sc->re_ldata.re_mtag, map, BUS_DMASYNC_PREWRITE);
2470 * Map the segment array into descriptors. We also keep track
2471 * of the end of the ring and set the end-of-ring bits as needed,
2472 * and we set the ownership bits in all except the very first
2473 * descriptor, whose ownership bits will be turned on later.
2475 tx_ring = sc->re_ldata.re_tx_list;
2483 cmdstat = segs[i].ds_len;
2484 d->re_bufaddr_lo = htole32(RE_ADDR_LO(segs[i].ds_addr));
2485 d->re_bufaddr_hi = htole32(RE_ADDR_HI(segs[i].ds_addr));
2487 cmdstat |= RE_TDESC_CMD_SOF;
2489 cmdstat |= RE_TDESC_CMD_OWN;
2490 if (idx == (sc->re_tx_desc_cnt - 1))
2491 cmdstat |= RE_TDESC_CMD_EOR;
2492 d->re_cmdstat = htole32(cmdstat | cmd_csum);
2493 d->re_control = htole32(ctl_csum | vlantag);
2496 if (i == arg.re_nsegs)
2498 RE_TXDESC_INC(sc, idx);
2500 d->re_cmdstat |= htole32(RE_TDESC_CMD_EOF);
2502 /* Transfer ownership of packet to the chip. */
2503 d->re_cmdstat |= htole32(RE_TDESC_CMD_OWN);
2505 tx_ring[*idx0].re_cmdstat |= htole32(RE_TDESC_CMD_OWN);
2508 * Insure that the map for this transmission
2509 * is placed at the array index of the last descriptor
2512 sc->re_ldata.re_tx_dmamap[*idx0] = sc->re_ldata.re_tx_dmamap[idx];
2513 sc->re_ldata.re_tx_dmamap[idx] = map;
2515 sc->re_ldata.re_tx_mbuf[idx] = m;
2516 sc->re_ldata.re_tx_free -= arg.re_nsegs;
2518 RE_TXDESC_INC(sc, idx);
2529 * Main transmit routine for C+ and gigE NICs.
2533 re_start(struct ifnet *ifp)
2535 struct re_softc *sc = ifp->if_softc;
2536 struct mbuf *m_head;
2537 int idx, need_trans, oactive, error;
2539 ASSERT_SERIALIZED(ifp->if_serializer);
2541 if ((sc->re_flags & RE_F_LINKED) == 0) {
2542 ifq_purge(&ifp->if_snd);
2546 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) != IFF_RUNNING)
2549 idx = sc->re_ldata.re_tx_prodidx;
2553 while (sc->re_ldata.re_tx_mbuf[idx] == NULL) {
2554 if (sc->re_ldata.re_tx_free <= RE_TXDESC_SPARE) {
2556 if (re_tx_collect(sc)) {
2561 ifp->if_flags |= IFF_OACTIVE;
2565 m_head = ifq_dequeue(&ifp->if_snd, NULL);
2569 error = re_encap(sc, &m_head, &idx);
2571 /* m_head is freed by re_encap(), if we reach here */
2574 if (error == EFBIG && !oactive) {
2575 if (re_tx_collect(sc)) {
2580 ifp->if_flags |= IFF_OACTIVE;
2588 * If there's a BPF listener, bounce a copy of this frame
2591 ETHER_BPF_MTAP(ifp, m_head);
2597 /* Flush the TX descriptors */
2598 bus_dmamap_sync(sc->re_ldata.re_tx_list_tag,
2599 sc->re_ldata.re_tx_list_map, BUS_DMASYNC_PREWRITE);
2601 sc->re_ldata.re_tx_prodidx = idx;
2604 * RealTek put the TX poll request register in a different
2605 * location on the 8169 gigE chip. I don't know why.
2607 CSR_WRITE_1(sc, sc->re_txstart, RE_TXSTART_START);
2610 * Set a timeout in case the chip goes out to lunch.
2618 struct re_softc *sc = xsc;
2619 struct ifnet *ifp = &sc->arpcom.ac_if;
2620 struct mii_data *mii;
2622 int error, framelen;
2624 ASSERT_SERIALIZED(ifp->if_serializer);
2626 mii = device_get_softc(sc->re_miibus);
2629 * Cancel pending I/O and free all RX/TX buffers.
2633 if (sc->re_caps & RE_C_CONTIGRX) {
2634 if (ifp->if_mtu > ETHERMTU) {
2635 KKASSERT(sc->re_ldata.re_jbuf != NULL);
2636 sc->re_flags |= RE_F_USE_JPOOL;
2637 sc->re_rxbuf_size = RE_FRAMELEN_MAX;
2638 sc->re_newbuf = re_newbuf_jumbo;
2640 sc->re_flags &= ~RE_F_USE_JPOOL;
2641 sc->re_rxbuf_size = MCLBYTES;
2642 sc->re_newbuf = re_newbuf_std;
2647 * Adjust max read request size according to MTU.
2648 * Mainly to improve TX performance for common case (ETHERMTU).
2650 if (sc->re_caps & RE_C_PCIE) {
2651 if (ifp->if_mtu > ETHERMTU) {
2653 * 512 seems to be the only value that works
2654 * reliably with jumbo frame
2656 pcie_set_max_readrq(sc->re_dev,
2657 PCIEM_DEVCTL_MAX_READRQ_512);
2659 pcie_set_max_readrq(sc->re_dev,
2660 PCIEM_DEVCTL_MAX_READRQ_4096);
2665 * Enable C+ RX and TX mode, as well as VLAN stripping and
2666 * RX checksum offload. We must configure the C+ register
2667 * before all others.
2669 CSR_WRITE_2(sc, RE_CPLUS_CMD, RE_CPLUSCMD_RXENB | RE_CPLUSCMD_TXENB |
2670 RE_CPLUSCMD_PCI_MRW |
2671 (ifp->if_capenable & IFCAP_VLAN_HWTAGGING ?
2672 RE_CPLUSCMD_VLANSTRIP : 0) |
2673 (ifp->if_capenable & IFCAP_RXCSUM ?
2674 RE_CPLUSCMD_RXCSUM_ENB : 0));
2677 * Init our MAC address. Even though the chipset
2678 * documentation doesn't mention it, we need to enter "Config
2679 * register write enable" mode to modify the ID registers.
2681 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_WRITECFG);
2682 CSR_WRITE_4(sc, RE_IDR0,
2683 htole32(*(uint32_t *)(&sc->arpcom.ac_enaddr[0])));
2684 CSR_WRITE_2(sc, RE_IDR4,
2685 htole16(*(uint16_t *)(&sc->arpcom.ac_enaddr[4])));
2686 CSR_WRITE_1(sc, RE_EECMD, RE_EEMODE_OFF);
2689 * For C+ mode, initialize the RX descriptors and mbufs.
2691 error = re_rx_list_init(sc);
2696 error = re_tx_list_init(sc);
2703 * Load the addresses of the RX and TX lists into the chip.
2705 CSR_WRITE_4(sc, RE_RXLIST_ADDR_HI,
2706 RE_ADDR_HI(sc->re_ldata.re_rx_list_addr));
2707 CSR_WRITE_4(sc, RE_RXLIST_ADDR_LO,
2708 RE_ADDR_LO(sc->re_ldata.re_rx_list_addr));
2710 CSR_WRITE_4(sc, RE_TXLIST_ADDR_HI,
2711 RE_ADDR_HI(sc->re_ldata.re_tx_list_addr));
2712 CSR_WRITE_4(sc, RE_TXLIST_ADDR_LO,
2713 RE_ADDR_LO(sc->re_ldata.re_tx_list_addr));
2716 * Enable transmit and receive.
2718 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB);
2721 * Set the initial TX and RX configuration.
2723 if (sc->re_flags & RE_F_TESTMODE) {
2724 if (!RE_IS_8139CP(sc))
2725 CSR_WRITE_4(sc, RE_TXCFG,
2726 RE_TXCFG_CONFIG | RE_LOOPTEST_ON);
2728 CSR_WRITE_4(sc, RE_TXCFG,
2729 RE_TXCFG_CONFIG | RE_LOOPTEST_ON_CPLUS);
2731 CSR_WRITE_4(sc, RE_TXCFG, RE_TXCFG_CONFIG);
2733 framelen = RE_FRAMELEN(ifp->if_mtu);
2734 if (framelen < MCLBYTES)
2735 CSR_WRITE_1(sc, RE_EARLY_TX_THRESH, howmany(MCLBYTES, 128));
2737 CSR_WRITE_1(sc, RE_EARLY_TX_THRESH, howmany(framelen, 128));
2739 CSR_WRITE_4(sc, RE_RXCFG, RE_RXCFG_CONFIG);
2741 /* Set the individual bit to receive frames for this host only. */
2742 rxcfg = CSR_READ_4(sc, RE_RXCFG);
2743 rxcfg |= RE_RXCFG_RX_INDIV;
2745 /* If we want promiscuous mode, set the allframes bit. */
2746 if (ifp->if_flags & IFF_PROMISC) {
2747 rxcfg |= RE_RXCFG_RX_ALLPHYS;
2748 CSR_WRITE_4(sc, RE_RXCFG, rxcfg);
2750 rxcfg &= ~RE_RXCFG_RX_ALLPHYS;
2751 CSR_WRITE_4(sc, RE_RXCFG, rxcfg);
2755 * Set capture broadcast bit to capture broadcast frames.
2757 if (ifp->if_flags & IFF_BROADCAST) {
2758 rxcfg |= RE_RXCFG_RX_BROAD;
2759 CSR_WRITE_4(sc, RE_RXCFG, rxcfg);
2761 rxcfg &= ~RE_RXCFG_RX_BROAD;
2762 CSR_WRITE_4(sc, RE_RXCFG, rxcfg);
2766 * Program the multicast filter, if necessary.
2770 #ifdef DEVICE_POLLING
2772 * Disable interrupts if we are polling.
2774 if (ifp->if_flags & IFF_POLLING)
2775 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
2776 else /* otherwise ... */
2777 #endif /* DEVICE_POLLING */
2779 * Enable interrupts.
2781 if (sc->re_flags & RE_F_TESTMODE)
2782 CSR_WRITE_2(sc, RE_IMR, 0);
2784 re_setup_intr(sc, 1, sc->re_imtype);
2785 CSR_WRITE_2(sc, RE_ISR, sc->re_intrs);
2787 /* Start RX/TX process. */
2788 CSR_WRITE_4(sc, RE_MISSEDPKT, 0);
2791 /* Enable receiver and transmitter. */
2792 CSR_WRITE_1(sc, RE_COMMAND, RE_CMD_TX_ENB|RE_CMD_RX_ENB);
2796 * For 8169 gigE NICs, set the max allowed RX packet
2797 * size so we can receive jumbo frames.
2799 if (!RE_IS_8139CP(sc)) {
2800 if (sc->re_caps & RE_C_CONTIGRX)
2801 CSR_WRITE_2(sc, RE_MAXRXPKTLEN, sc->re_rxbuf_size);
2803 CSR_WRITE_2(sc, RE_MAXRXPKTLEN, 16383);
2806 if (sc->re_flags & RE_F_TESTMODE)
2811 CSR_WRITE_1(sc, RE_CFG1, RE_CFG1_DRVLOAD|RE_CFG1_FULLDUPLEX);
2813 ifp->if_flags |= IFF_RUNNING;
2814 ifp->if_flags &= ~IFF_OACTIVE;
2816 callout_reset(&sc->re_timer, hz, re_tick, sc);
2820 * Set media options.
2823 re_ifmedia_upd(struct ifnet *ifp)
2825 struct re_softc *sc = ifp->if_softc;
2826 struct mii_data *mii;
2828 ASSERT_SERIALIZED(ifp->if_serializer);
2830 mii = device_get_softc(sc->re_miibus);
2837 * Report current media status.
2840 re_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
2842 struct re_softc *sc = ifp->if_softc;
2843 struct mii_data *mii;
2845 ASSERT_SERIALIZED(ifp->if_serializer);
2847 mii = device_get_softc(sc->re_miibus);
2850 ifmr->ifm_active = mii->mii_media_active;
2851 ifmr->ifm_status = mii->mii_media_status;
2855 re_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
2857 struct re_softc *sc = ifp->if_softc;
2858 struct ifreq *ifr = (struct ifreq *) data;
2859 struct mii_data *mii;
2860 int error = 0, mask;
2862 ASSERT_SERIALIZED(ifp->if_serializer);
2866 if (ifr->ifr_mtu > sc->re_maxmtu) {
2868 } else if (ifp->if_mtu != ifr->ifr_mtu) {
2869 ifp->if_mtu = ifr->ifr_mtu;
2870 if (ifp->if_flags & IFF_RUNNING)
2876 if (ifp->if_flags & IFF_UP)
2878 else if (ifp->if_flags & IFF_RUNNING)
2888 mii = device_get_softc(sc->re_miibus);
2889 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
2892 mask = (ifr->ifr_reqcap ^ ifp->if_capenable) &
2893 ifp->if_capabilities;
2894 ifp->if_capenable ^= mask;
2896 if (mask & IFCAP_HWCSUM) {
2897 if (ifp->if_capenable & IFCAP_TXCSUM)
2898 ifp->if_hwassist = RE_CSUM_FEATURES;
2900 ifp->if_hwassist = 0;
2902 if (mask && (ifp->if_flags & IFF_RUNNING))
2906 error = ether_ioctl(ifp, command, data);
2913 re_watchdog(struct ifnet *ifp)
2915 struct re_softc *sc = ifp->if_softc;
2917 ASSERT_SERIALIZED(ifp->if_serializer);
2919 if_printf(ifp, "watchdog timeout\n");
2928 if (!ifq_is_empty(&ifp->if_snd))
2933 * Stop the adapter and free any mbufs allocated to the
2937 re_stop(struct re_softc *sc)
2939 struct ifnet *ifp = &sc->arpcom.ac_if;
2942 ASSERT_SERIALIZED(ifp->if_serializer);
2944 /* Reset the adapter. */
2945 re_reset(sc, ifp->if_flags & IFF_RUNNING);
2948 callout_stop(&sc->re_timer);
2950 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
2951 sc->re_flags &= ~(RE_F_TIMER_INTR | RE_F_DROP_RXFRAG | RE_F_LINKED);
2953 CSR_WRITE_1(sc, RE_COMMAND, 0x00);
2954 CSR_WRITE_2(sc, RE_IMR, 0x0000);
2955 CSR_WRITE_2(sc, RE_ISR, 0xFFFF);
2957 re_free_rxchain(sc);
2959 /* Free the TX list buffers. */
2960 for (i = 0; i < sc->re_tx_desc_cnt; i++) {
2961 if (sc->re_ldata.re_tx_mbuf[i] != NULL) {
2962 bus_dmamap_unload(sc->re_ldata.re_mtag,
2963 sc->re_ldata.re_tx_dmamap[i]);
2964 m_freem(sc->re_ldata.re_tx_mbuf[i]);
2965 sc->re_ldata.re_tx_mbuf[i] = NULL;
2969 /* Free the RX list buffers. */
2970 for (i = 0; i < sc->re_rx_desc_cnt; i++) {
2971 if (sc->re_ldata.re_rx_mbuf[i] != NULL) {
2972 if ((sc->re_flags & RE_F_USE_JPOOL) == 0) {
2973 bus_dmamap_unload(sc->re_ldata.re_mtag,
2974 sc->re_ldata.re_rx_dmamap[i]);
2976 m_freem(sc->re_ldata.re_rx_mbuf[i]);
2977 sc->re_ldata.re_rx_mbuf[i] = NULL;
2983 * Device suspend routine. Stop the interface and save some PCI
2984 * settings in case the BIOS doesn't restore them properly on
2988 re_suspend(device_t dev)
2990 #ifndef BURN_BRIDGES
2993 struct re_softc *sc = device_get_softc(dev);
2994 struct ifnet *ifp = &sc->arpcom.ac_if;
2996 lwkt_serialize_enter(ifp->if_serializer);
3000 #ifndef BURN_BRIDGES
3001 for (i = 0; i < 5; i++)
3002 sc->saved_maps[i] = pci_read_config(dev, PCIR_MAPS + i * 4, 4);
3003 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
3004 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
3005 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
3006 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
3009 sc->re_flags |= RE_F_SUSPENDED;
3011 lwkt_serialize_exit(ifp->if_serializer);
3017 * Device resume routine. Restore some PCI settings in case the BIOS
3018 * doesn't, re-enable busmastering, and restart the interface if
3022 re_resume(device_t dev)
3024 struct re_softc *sc = device_get_softc(dev);
3025 struct ifnet *ifp = &sc->arpcom.ac_if;
3026 #ifndef BURN_BRIDGES
3030 lwkt_serialize_enter(ifp->if_serializer);
3032 #ifndef BURN_BRIDGES
3033 /* better way to do this? */
3034 for (i = 0; i < 5; i++)
3035 pci_write_config(dev, PCIR_MAPS + i * 4, sc->saved_maps[i], 4);
3036 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
3037 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
3038 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
3039 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
3041 /* reenable busmastering */
3042 pci_enable_busmaster(dev);
3043 pci_enable_io(dev, SYS_RES_IOPORT);
3046 /* reinitialize interface if necessary */
3047 if (ifp->if_flags & IFF_UP)
3050 sc->re_flags &= ~RE_F_SUSPENDED;
3052 lwkt_serialize_exit(ifp->if_serializer);
3058 * Stop all chip I/O so that the kernel's probe routines don't
3059 * get confused by errant DMAs when rebooting.
3062 re_shutdown(device_t dev)
3064 struct re_softc *sc = device_get_softc(dev);
3065 struct ifnet *ifp = &sc->arpcom.ac_if;
3067 lwkt_serialize_enter(ifp->if_serializer);
3069 lwkt_serialize_exit(ifp->if_serializer);
3073 re_sysctl_rxtime(SYSCTL_HANDLER_ARGS)
3075 struct re_softc *sc = arg1;
3077 return re_sysctl_hwtime(oidp, arg1, arg2, req, &sc->re_rx_time);
3081 re_sysctl_txtime(SYSCTL_HANDLER_ARGS)
3083 struct re_softc *sc = arg1;
3085 return re_sysctl_hwtime(oidp, arg1, arg2, req, &sc->re_tx_time);
3089 re_sysctl_hwtime(SYSCTL_HANDLER_ARGS, int *hwtime)
3091 struct re_softc *sc = arg1;
3092 struct ifnet *ifp = &sc->arpcom.ac_if;
3095 lwkt_serialize_enter(ifp->if_serializer);
3098 error = sysctl_handle_int(oidp, &v, 0, req);
3099 if (error || req->newptr == NULL)
3110 if ((ifp->if_flags & (IFF_RUNNING | IFF_POLLING)) ==
3111 IFF_RUNNING && sc->re_imtype == RE_IMTYPE_HW)
3115 lwkt_serialize_exit(ifp->if_serializer);
3120 re_sysctl_simtime(SYSCTL_HANDLER_ARGS)
3122 struct re_softc *sc = arg1;
3123 struct ifnet *ifp = &sc->arpcom.ac_if;
3126 lwkt_serialize_enter(ifp->if_serializer);
3128 v = sc->re_sim_time;
3129 error = sysctl_handle_int(oidp, &v, 0, req);
3130 if (error || req->newptr == NULL)
3138 if (v != sc->re_sim_time) {
3139 sc->re_sim_time = v;
3141 if ((ifp->if_flags & (IFF_RUNNING | IFF_POLLING)) ==
3142 IFF_RUNNING && sc->re_imtype == RE_IMTYPE_SIM) {
3147 * Following code causes various strange
3148 * performance problems. Hmm ...
3150 CSR_WRITE_2(sc, RE_IMR, 0);
3151 if (!RE_IS_8139CP(sc))
3152 reg = RE_TIMERINT_8169;
3155 CSR_WRITE_4(sc, reg, 0);
3156 CSR_READ_4(sc, reg); /* flush */
3158 CSR_WRITE_2(sc, RE_IMR, sc->re_intrs);
3159 re_setup_sim_im(sc);
3161 re_setup_intr(sc, 0, RE_IMTYPE_NONE);
3163 re_setup_intr(sc, 1, RE_IMTYPE_SIM);
3168 lwkt_serialize_exit(ifp->if_serializer);
3173 re_sysctl_imtype(SYSCTL_HANDLER_ARGS)
3175 struct re_softc *sc = arg1;
3176 struct ifnet *ifp = &sc->arpcom.ac_if;
3179 lwkt_serialize_enter(ifp->if_serializer);
3182 error = sysctl_handle_int(oidp, &v, 0, req);
3183 if (error || req->newptr == NULL)
3186 if (v != RE_IMTYPE_HW && v != RE_IMTYPE_SIM && v != RE_IMTYPE_NONE) {
3190 if (v == RE_IMTYPE_HW && (sc->re_caps & RE_C_HWIM) == 0) {
3191 /* Can't do hardware interrupt moderation */
3196 if (v != sc->re_imtype) {
3198 if ((ifp->if_flags & (IFF_RUNNING | IFF_POLLING)) ==
3200 re_setup_intr(sc, 1, sc->re_imtype);
3203 lwkt_serialize_exit(ifp->if_serializer);
3208 re_setup_hw_im(struct re_softc *sc)
3210 KKASSERT(sc->re_caps & RE_C_HWIM);
3213 * Interrupt moderation
3216 * A - unknown (maybe TX related)
3217 * B - TX timer (unit: 25us)
3218 * C - unknown (maybe RX related)
3219 * D - RX timer (unit: 25us)
3222 * re(4)'s interrupt moderation is actually controlled by
3223 * two variables, like most other NICs (bge, bce etc.)
3225 * o number of packets [P]
3227 * The logic relationship between these two variables is
3228 * similar to other NICs too:
3229 * if (timer expire || packets > [P])
3230 * Interrupt is delivered
3232 * Currently we only know how to set 'timer', but not
3233 * 'number of packets', which should be ~30, as far as I
3234 * tested (sink ~900Kpps, interrupt rate is 30KHz)
3236 CSR_WRITE_2(sc, RE_IM,
3237 RE_IM_RXTIME(sc->re_rx_time) |
3238 RE_IM_TXTIME(sc->re_tx_time) |
3243 re_disable_hw_im(struct re_softc *sc)
3245 if (sc->re_caps & RE_C_HWIM)
3246 CSR_WRITE_2(sc, RE_IM, 0);
3250 re_setup_sim_im(struct re_softc *sc)
3252 if (!RE_IS_8139CP(sc)) {
3256 * Datasheet says tick decreases at bus speed,
3257 * but it seems the clock runs a little bit
3258 * faster, so we do some compensation here.
3260 ticks = (sc->re_sim_time * sc->re_bus_speed * 8) / 5;
3261 CSR_WRITE_4(sc, RE_TIMERINT_8169, ticks);
3263 CSR_WRITE_4(sc, RE_TIMERINT, 0x400); /* XXX */
3265 CSR_WRITE_4(sc, RE_TIMERCNT, 1); /* reload */
3266 sc->re_flags |= RE_F_TIMER_INTR;
3270 re_disable_sim_im(struct re_softc *sc)
3272 if (!RE_IS_8139CP(sc))
3273 CSR_WRITE_4(sc, RE_TIMERINT_8169, 0);
3275 CSR_WRITE_4(sc, RE_TIMERINT, 0);
3276 sc->re_flags &= ~RE_F_TIMER_INTR;
3280 re_config_imtype(struct re_softc *sc, int imtype)
3284 KKASSERT(sc->re_caps & RE_C_HWIM);
3286 case RE_IMTYPE_NONE:
3287 sc->re_intrs = RE_INTRS;
3288 sc->re_rx_ack = RE_ISR_RX_OK | RE_ISR_FIFO_OFLOW |
3290 sc->re_tx_ack = RE_ISR_TX_OK;
3294 sc->re_intrs = RE_INTRS_TIMER;
3295 sc->re_rx_ack = RE_ISR_TIMEOUT_EXPIRED;
3296 sc->re_tx_ack = RE_ISR_TIMEOUT_EXPIRED;
3300 panic("%s: unknown imtype %d\n",
3301 sc->arpcom.ac_if.if_xname, imtype);
3306 re_setup_intr(struct re_softc *sc, int enable_intrs, int imtype)
3308 re_config_imtype(sc, imtype);
3311 CSR_WRITE_2(sc, RE_IMR, sc->re_intrs);
3313 CSR_WRITE_2(sc, RE_IMR, 0);
3316 case RE_IMTYPE_NONE:
3317 re_disable_sim_im(sc);
3318 re_disable_hw_im(sc);
3322 KKASSERT(sc->re_caps & RE_C_HWIM);
3323 re_disable_sim_im(sc);
3328 re_disable_hw_im(sc);
3329 re_setup_sim_im(sc);
3333 panic("%s: unknown imtype %d\n",
3334 sc->arpcom.ac_if.if_xname, imtype);
3339 re_get_eaddr(struct re_softc *sc, uint8_t *eaddr)
3343 if (sc->re_macver == RE_MACVER_11 || sc->re_macver == RE_MACVER_12) {
3347 re_read_eeprom(sc, (caddr_t)&re_did, 0, 1);
3348 if (re_did == 0x8128) {
3349 uint16_t as[ETHER_ADDR_LEN / 2];
3352 * Get station address from the EEPROM.
3354 re_read_eeprom(sc, (caddr_t)as, RE_EE_EADDR, 3);
3355 for (i = 0; i < ETHER_ADDR_LEN / 2; i++)
3356 as[i] = le16toh(as[i]);
3357 bcopy(as, eaddr, sizeof(eaddr));
3363 * Get station address from IDRx.
3365 for (i = 0; i < ETHER_ADDR_LEN; ++i)
3366 eaddr[i] = CSR_READ_1(sc, RE_IDR0 + i);
3370 re_jpool_alloc(struct re_softc *sc)
3372 struct re_list_data *ldata = &sc->re_ldata;
3373 struct re_jbuf *jbuf;
3375 bus_size_t jpool_size;
3379 lwkt_serialize_init(&ldata->re_jbuf_serializer);
3381 ldata->re_jbuf = kmalloc(sizeof(struct re_jbuf) * RE_JBUF_COUNT(sc),
3382 M_DEVBUF, M_WAITOK | M_ZERO);
3384 jpool_size = RE_JBUF_COUNT(sc) * RE_JBUF_SIZE;
3386 error = bus_dma_tag_create(sc->re_parent_tag,
3387 RE_BUF_ALIGN, 0, /* alignment, boundary */
3388 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
3389 BUS_SPACE_MAXADDR, /* highaddr */
3390 NULL, NULL, /* filter, filterarg */
3391 jpool_size, 1, /* nsegments, maxsize */
3392 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
3393 BUS_DMA_ALLOCNOW, /* flags */
3394 &ldata->re_jpool_tag);
3396 device_printf(sc->re_dev, "could not allocate jumbo dma tag\n");
3400 error = bus_dmamem_alloc(ldata->re_jpool_tag, (void **)&ldata->re_jpool,
3401 BUS_DMA_WAITOK, &ldata->re_jpool_map);
3403 device_printf(sc->re_dev,
3404 "could not allocate jumbo dma memory\n");
3405 bus_dma_tag_destroy(ldata->re_jpool_tag);
3406 ldata->re_jpool_tag = NULL;
3410 error = bus_dmamap_load(ldata->re_jpool_tag, ldata->re_jpool_map,
3411 ldata->re_jpool, jpool_size,
3412 re_dma_map_addr, &paddr, BUS_DMA_WAITOK);
3414 device_printf(sc->re_dev, "could not load jumbo dma map\n");
3415 bus_dmamem_free(ldata->re_jpool_tag, ldata->re_jpool,
3416 ldata->re_jpool_map);
3417 bus_dma_tag_destroy(ldata->re_jpool_tag);
3418 ldata->re_jpool_tag = NULL;
3422 /* ..and split it into 9KB chunks */
3423 SLIST_INIT(&ldata->re_jbuf_free);
3425 buf = ldata->re_jpool;
3426 for (i = 0; i < RE_JBUF_COUNT(sc); i++) {
3427 jbuf = &ldata->re_jbuf[i];
3433 jbuf->re_paddr = paddr;
3435 SLIST_INSERT_HEAD(&ldata->re_jbuf_free, jbuf, re_link);
3437 buf += RE_JBUF_SIZE;
3438 paddr += RE_JBUF_SIZE;
3444 re_jpool_free(struct re_softc *sc)
3446 struct re_list_data *ldata = &sc->re_ldata;
3448 if (ldata->re_jpool_tag != NULL) {
3449 bus_dmamap_unload(ldata->re_jpool_tag, ldata->re_jpool_map);
3450 bus_dmamem_free(ldata->re_jpool_tag, ldata->re_jpool,
3451 ldata->re_jpool_map);
3452 bus_dma_tag_destroy(ldata->re_jpool_tag);
3453 ldata->re_jpool_tag = NULL;
3456 if (ldata->re_jbuf != NULL) {
3457 kfree(ldata->re_jbuf, M_DEVBUF);
3458 ldata->re_jbuf = NULL;
3462 static struct re_jbuf *
3463 re_jbuf_alloc(struct re_softc *sc)
3465 struct re_list_data *ldata = &sc->re_ldata;
3466 struct re_jbuf *jbuf;
3468 lwkt_serialize_enter(&ldata->re_jbuf_serializer);
3470 jbuf = SLIST_FIRST(&ldata->re_jbuf_free);
3472 SLIST_REMOVE_HEAD(&ldata->re_jbuf_free, re_link);
3476 lwkt_serialize_exit(&ldata->re_jbuf_serializer);
3482 re_jbuf_free(void *arg)
3484 struct re_jbuf *jbuf = arg;
3485 struct re_softc *sc = jbuf->re_sc;
3486 struct re_list_data *ldata = &sc->re_ldata;
3488 if (&ldata->re_jbuf[jbuf->re_slot] != jbuf) {
3489 panic("%s: free wrong jumbo buffer\n",
3490 sc->arpcom.ac_if.if_xname);
3491 } else if (jbuf->re_inuse == 0) {
3492 panic("%s: jumbo buffer already freed\n",
3493 sc->arpcom.ac_if.if_xname);
3496 lwkt_serialize_enter(&ldata->re_jbuf_serializer);
3497 atomic_subtract_int(&jbuf->re_inuse, 1);
3498 if (jbuf->re_inuse == 0)
3499 SLIST_INSERT_HEAD(&ldata->re_jbuf_free, jbuf, re_link);
3500 lwkt_serialize_exit(&ldata->re_jbuf_serializer);
3504 re_jbuf_ref(void *arg)
3506 struct re_jbuf *jbuf = arg;
3507 struct re_softc *sc = jbuf->re_sc;
3508 struct re_list_data *ldata = &sc->re_ldata;
3510 if (&ldata->re_jbuf[jbuf->re_slot] != jbuf) {
3511 panic("%s: ref wrong jumbo buffer\n",
3512 sc->arpcom.ac_if.if_xname);
3513 } else if (jbuf->re_inuse == 0) {
3514 panic("%s: jumbo buffer already freed\n",
3515 sc->arpcom.ac_if.if_xname);
3517 atomic_add_int(&jbuf->re_inuse, 1);