2 * Copyright (c) 1997, 1998
3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Bill Paul.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
32 * $FreeBSD: src/sys/pci/if_rl.c,v 1.38.2.16 2003/03/05 18:42:33 njl Exp $
33 * $DragonFly: src/sys/dev/netif/rl/if_rl.c,v 1.21 2005/05/24 20:59:02 dillon Exp $
37 * RealTek 8129/8139 PCI NIC driver
39 * Supports several extremely cheap PCI 10/100 adapters based on
40 * the RealTek chipset. Datasheets can be obtained from
43 * Written by Bill Paul <wpaul@ctr.columbia.edu>
44 * Electrical Engineering Department
45 * Columbia University, New York City
49 * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is
50 * probably the worst PCI ethernet controller ever made, with the possible
51 * exception of the FEAST chip made by SMC. The 8139 supports bus-master
52 * DMA, but it has a terrible interface that nullifies any performance
53 * gains that bus-master DMA usually offers.
55 * For transmission, the chip offers a series of four TX descriptor
56 * registers. Each transmit frame must be in a contiguous buffer, aligned
57 * on a longword (32-bit) boundary. This means we almost always have to
58 * do mbuf copies in order to transmit a frame, except in the unlikely
59 * case where a) the packet fits into a single mbuf, and b) the packet
60 * is 32-bit aligned within the mbuf's data area. The presence of only
61 * four descriptor registers means that we can never have more than four
62 * packets queued for transmission at any one time.
64 * Reception is not much better. The driver has to allocate a single large
65 * buffer area (up to 64K in size) into which the chip will DMA received
66 * frames. Because we don't know where within this region received packets
67 * will begin or end, we have no choice but to copy data from the buffer
68 * area into mbufs in order to pass the packets up to the higher protocol
71 * It's impossible given this rotten design to really achieve decent
72 * performance at 100Mbps, unless you happen to have a 400Mhz PII or
73 * some equally overmuscled CPU to drive it.
75 * On the bright side, the 8139 does have a built-in PHY, although
76 * rather than using an MDIO serial interface like most other NICs, the
77 * PHY registers are directly accessible through the 8139's register
78 * space. The 8139 supports autonegotiation, as well as a 64-bit multicast
81 * The 8129 chip is an older version of the 8139 that uses an external PHY
82 * chip. The 8129 has a serial MDIO interface for accessing the MII where
83 * the 8139 lets you directly access the on-board PHY registers. We need
84 * to select which interface to use depending on the chip type.
87 #include <sys/param.h>
88 #include <sys/endian.h>
89 #include <sys/systm.h>
90 #include <sys/sockio.h>
92 #include <sys/malloc.h>
93 #include <sys/kernel.h>
94 #include <sys/module.h>
95 #include <sys/socket.h>
98 #include <net/ifq_var.h>
99 #include <net/if_arp.h>
100 #include <net/ethernet.h>
101 #include <net/if_dl.h>
102 #include <net/if_media.h>
106 #include <machine/bus_pio.h>
107 #include <machine/bus_memio.h>
108 #include <machine/bus.h>
109 #include <machine/resource.h>
111 #include <sys/rman.h>
113 #include <dev/netif/mii_layer/mii.h>
114 #include <dev/netif/mii_layer/miivar.h>
116 #include <bus/pci/pcireg.h>
117 #include <bus/pci/pcivar.h>
119 /* "controller miibus0" required. See GENERIC if you get errors here. */
120 #include "miibus_if.h"
123 * Default to using PIO access for this driver. On SMP systems,
124 * there appear to be problems with memory mapped mode: it looks like
125 * doing too many memory mapped access back to back in rapid succession
126 * can hang the bus. I'm inclined to blame this on crummy design/construction
127 * on the part of RealTek. Memory mapped mode does appear to work on
128 * uniprocessor systems though.
130 #define RL_USEIOSPACE
132 #include <dev/netif/rl/if_rlreg.h>
135 * Various supported device vendors/types and their names.
137 static struct rl_type {
142 { RT_VENDORID, RT_DEVICEID_8129,
143 "RealTek 8129 10/100BaseTX" },
144 { RT_VENDORID, RT_DEVICEID_8139,
145 "RealTek 8139 10/100BaseTX" },
146 { RT_VENDORID, RT_DEVICEID_8138,
147 "RealTek 8139 10/100BaseTX CardBus" },
148 { ACCTON_VENDORID, ACCTON_DEVICEID_5030,
149 "Accton MPX 5030/5038 10/100BaseTX" },
150 { DELTA_VENDORID, DELTA_DEVICEID_8139,
151 "Delta Electronics 8139 10/100BaseTX" },
152 { ADDTRON_VENDORID, ADDTRON_DEVICEID_8139,
153 "Addtron Technolgy 8139 10/100BaseTX" },
154 { DLINK_VENDORID, DLINK_DEVICEID_530TXPLUS,
155 "D-Link DFE-530TX+ 10/100BaseTX" },
156 { DLINK_VENDORID, DLINK_DEVICEID_690TXD,
157 "D-Link DFE-690TX 10/100BaseTX" },
158 { NORTEL_VENDORID, ACCTON_DEVICEID_5030,
159 "Nortel Networks 10/100BaseTX" },
160 { PEPPERCON_VENDORID, PEPPERCON_DEVICEID_ROLF,
161 "Peppercon AG ROL/F" },
162 { COREGA_VENDORID, COREGA_DEVICEID_FETHERCBTXD,
163 "Corega FEther CB-TXD" },
164 { COREGA_VENDORID, COREGA_DEVICEID_FETHERIICBTXD,
165 "Corega FEtherII CB-TXD" },
166 { PLANEX_VENDORID, PLANEX_DEVICEID_FNW3800TX,
167 "Planex FNW-3800-TX" },
171 static int rl_probe(device_t);
172 static int rl_attach(device_t);
173 static int rl_detach(device_t);
175 static int rl_encap(struct rl_softc *, struct mbuf * );
177 static void rl_rxeof(struct rl_softc *);
178 static void rl_txeof(struct rl_softc *);
179 static void rl_intr(void *);
180 static void rl_tick(void *);
181 static void rl_start(struct ifnet *);
182 static int rl_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
183 static void rl_init(void *);
184 static void rl_stop (struct rl_softc *);
185 static void rl_watchdog(struct ifnet *);
186 static int rl_suspend(device_t);
187 static int rl_resume(device_t);
188 static void rl_shutdown(device_t);
189 static int rl_ifmedia_upd(struct ifnet *);
190 static void rl_ifmedia_sts(struct ifnet *, struct ifmediareq *);
192 static void rl_eeprom_putbyte(struct rl_softc *, int);
193 static void rl_eeprom_getword(struct rl_softc *, int, uint16_t *);
194 static void rl_read_eeprom(struct rl_softc *, caddr_t, int, int, int);
195 static void rl_mii_sync(struct rl_softc *);
196 static void rl_mii_send(struct rl_softc *, uint32_t, int);
197 static int rl_mii_readreg(struct rl_softc *, struct rl_mii_frame *);
198 static int rl_mii_writereg(struct rl_softc *, struct rl_mii_frame *);
200 static int rl_miibus_readreg(device_t, int, int);
201 static int rl_miibus_writereg(device_t, int, int, int);
202 static void rl_miibus_statchg(device_t);
204 static void rl_setmulti(struct rl_softc *);
205 static void rl_reset(struct rl_softc *);
206 static void rl_list_tx_init(struct rl_softc *);
208 static void rl_dma_map_rxbuf(void *, bus_dma_segment_t *, int, int);
209 static void rl_dma_map_txbuf(void *, bus_dma_segment_t *, int, int);
212 #define RL_RES SYS_RES_IOPORT
213 #define RL_RID RL_PCI_LOIO
215 #define RL_RES SYS_RES_MEMORY
216 #define RL_RID RL_PCI_LOMEM
219 static device_method_t rl_methods[] = {
220 /* Device interface */
221 DEVMETHOD(device_probe, rl_probe),
222 DEVMETHOD(device_attach, rl_attach),
223 DEVMETHOD(device_detach, rl_detach),
224 DEVMETHOD(device_suspend, rl_suspend),
225 DEVMETHOD(device_resume, rl_resume),
226 DEVMETHOD(device_shutdown, rl_shutdown),
229 DEVMETHOD(bus_print_child, bus_generic_print_child),
230 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
233 DEVMETHOD(miibus_readreg, rl_miibus_readreg),
234 DEVMETHOD(miibus_writereg, rl_miibus_writereg),
235 DEVMETHOD(miibus_statchg, rl_miibus_statchg),
240 static DEFINE_CLASS_0(rl, rl_driver, rl_methods, sizeof(struct rl_softc));
241 static devclass_t rl_devclass;
243 DECLARE_DUMMY_MODULE(if_rl);
244 DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, 0, 0);
245 DRIVER_MODULE(if_rl, cardbus, rl_driver, rl_devclass, 0, 0);
246 DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, 0, 0);
247 MODULE_DEPEND(if_rl, miibus, 1, 1, 1);
250 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) | (x))
253 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) & ~(x))
256 rl_dma_map_rxbuf(void *arg, bus_dma_segment_t *segs, int nseg, int error)
258 struct rl_softc *sc = arg;
260 CSR_WRITE_4(sc, RL_RXADDR, segs->ds_addr & 0xFFFFFFFF);
264 rl_dma_map_txbuf(void *arg, bus_dma_segment_t *segs, int nseg, int error)
266 struct rl_softc *sc = arg;
268 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), segs->ds_addr & 0xFFFFFFFF);
272 * Send a read command and address to the EEPROM, check for ACK.
275 rl_eeprom_putbyte(struct rl_softc *sc, int addr)
279 d = addr | sc->rl_eecmd_read;
282 * Feed in each bit and strobe the clock.
284 for (i = 0x400; i; i >>= 1) {
286 EE_SET(RL_EE_DATAIN);
288 EE_CLR(RL_EE_DATAIN);
298 * Read a word of data stored in the EEPROM at address 'addr.'
301 rl_eeprom_getword(struct rl_softc *sc, int addr, uint16_t *dest)
306 /* Enter EEPROM access mode. */
307 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
310 * Send address of word we want to read.
312 rl_eeprom_putbyte(sc, addr);
314 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
317 * Start reading bits from EEPROM.
319 for (i = 0x8000; i; i >>= 1) {
322 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT)
328 /* Turn off EEPROM access mode. */
329 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
335 * Read a sequence of words from the EEPROM.
338 rl_read_eeprom(struct rl_softc *sc, caddr_t dest, int off, int cnt, int swap)
341 u_int16_t word = 0, *ptr;
343 for (i = 0; i < cnt; i++) {
344 rl_eeprom_getword(sc, off + i, &word);
345 ptr = (u_int16_t *)(dest + (i * 2));
355 * MII access routines are provided for the 8129, which
356 * doesn't have a built-in PHY. For the 8139, we fake things
357 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the
358 * direct access PHY registers.
361 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) | x)
364 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) & ~x)
367 * Sync the PHYs by setting data bit and strobing the clock 32 times.
370 rl_mii_sync(struct rl_softc *sc)
374 MII_SET(RL_MII_DIR|RL_MII_DATAOUT);
376 for (i = 0; i < 32; i++) {
385 * Clock a series of bits through the MII.
388 rl_mii_send(struct rl_softc *sc, uint32_t bits, int cnt)
394 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
396 MII_SET(RL_MII_DATAOUT);
398 MII_CLR(RL_MII_DATAOUT);
407 * Read an PHY register through the MII.
410 rl_mii_readreg(struct rl_softc *sc, struct rl_mii_frame *frame)
417 * Set up frame for RX.
419 frame->mii_stdelim = RL_MII_STARTDELIM;
420 frame->mii_opcode = RL_MII_READOP;
421 frame->mii_turnaround = 0;
424 CSR_WRITE_2(sc, RL_MII, 0);
434 * Send command/address info.
436 rl_mii_send(sc, frame->mii_stdelim, 2);
437 rl_mii_send(sc, frame->mii_opcode, 2);
438 rl_mii_send(sc, frame->mii_phyaddr, 5);
439 rl_mii_send(sc, frame->mii_regaddr, 5);
442 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT));
453 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN;
458 * Now try reading data bits. If the ack failed, we still
459 * need to clock through 16 cycles to keep the PHY(s) in sync.
462 for(i = 0; i < 16; i++) {
469 for (i = 0x8000; i; i >>= 1) {
473 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN)
474 frame->mii_data |= i;
493 * Write to a PHY register through the MII.
496 rl_mii_writereg(struct rl_softc *sc, struct rl_mii_frame *frame)
502 * Set up frame for TX.
505 frame->mii_stdelim = RL_MII_STARTDELIM;
506 frame->mii_opcode = RL_MII_WRITEOP;
507 frame->mii_turnaround = RL_MII_TURNAROUND;
510 * Turn on data output.
516 rl_mii_send(sc, frame->mii_stdelim, 2);
517 rl_mii_send(sc, frame->mii_opcode, 2);
518 rl_mii_send(sc, frame->mii_phyaddr, 5);
519 rl_mii_send(sc, frame->mii_regaddr, 5);
520 rl_mii_send(sc, frame->mii_turnaround, 2);
521 rl_mii_send(sc, frame->mii_data, 16);
540 rl_miibus_readreg(device_t dev, int phy, int reg)
543 struct rl_mii_frame frame;
545 uint16_t rl8139_reg = 0;
547 sc = device_get_softc(dev);
549 if (sc->rl_type == RL_8139) {
550 /* Pretend the internal PHY is only at address 0 */
555 rl8139_reg = RL_BMCR;
558 rl8139_reg = RL_BMSR;
561 rl8139_reg = RL_ANAR;
564 rl8139_reg = RL_ANER;
567 rl8139_reg = RL_LPAR;
574 * Allow the rlphy driver to read the media status
575 * register. If we have a link partner which does not
576 * support NWAY, this is the register which will tell
577 * us the results of parallel detection.
580 rval = CSR_READ_1(sc, RL_MEDIASTAT);
583 device_printf(dev, "bad phy register\n");
586 rval = CSR_READ_2(sc, rl8139_reg);
590 bzero(&frame, sizeof(frame));
592 frame.mii_phyaddr = phy;
593 frame.mii_regaddr = reg;
594 rl_mii_readreg(sc, &frame);
596 return(frame.mii_data);
600 rl_miibus_writereg(device_t dev, int phy, int reg, int data)
603 struct rl_mii_frame frame;
604 u_int16_t rl8139_reg = 0;
606 sc = device_get_softc(dev);
608 if (sc->rl_type == RL_8139) {
609 /* Pretend the internal PHY is only at address 0 */
614 rl8139_reg = RL_BMCR;
617 rl8139_reg = RL_BMSR;
620 rl8139_reg = RL_ANAR;
623 rl8139_reg = RL_ANER;
626 rl8139_reg = RL_LPAR;
632 device_printf(dev, "bad phy register\n");
635 CSR_WRITE_2(sc, rl8139_reg, data);
639 bzero(&frame, sizeof(frame));
641 frame.mii_phyaddr = phy;
642 frame.mii_regaddr = reg;
643 frame.mii_data = data;
645 rl_mii_writereg(sc, &frame);
651 rl_miibus_statchg(device_t dev)
656 * Program the 64-bit multicast hash filter.
659 rl_setmulti(struct rl_softc *sc)
663 uint32_t hashes[2] = { 0, 0 };
664 struct ifmultiaddr *ifma;
668 ifp = &sc->arpcom.ac_if;
670 rxfilt = CSR_READ_4(sc, RL_RXCFG);
672 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
673 rxfilt |= RL_RXCFG_RX_MULTI;
674 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
675 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF);
676 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF);
680 /* first, zot all the existing hash bits */
681 CSR_WRITE_4(sc, RL_MAR0, 0);
682 CSR_WRITE_4(sc, RL_MAR4, 0);
684 /* now program new ones */
685 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
686 if (ifma->ifma_addr->sa_family != AF_LINK)
689 LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
690 ETHER_ADDR_LEN >> 26);
692 hashes[0] |= (1 << h);
694 hashes[1] |= (1 << (h - 32));
699 rxfilt |= RL_RXCFG_RX_MULTI;
701 rxfilt &= ~RL_RXCFG_RX_MULTI;
703 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
704 CSR_WRITE_4(sc, RL_MAR0, hashes[0]);
705 CSR_WRITE_4(sc, RL_MAR4, hashes[1]);
709 rl_reset(struct rl_softc *sc)
713 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET);
715 for (i = 0; i < RL_TIMEOUT; i++) {
717 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET))
721 device_printf(sc->rl_dev, "reset never completed!\n");
725 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device
726 * IDs against our list and return a device name if we find a match.
728 * Return with a value < 0 to give re(4) a change to attach.
731 rl_probe(device_t dev)
734 uint16_t product = pci_get_device(dev);
735 uint16_t vendor = pci_get_vendor(dev);
737 for (t = rl_devs; t->rl_name != NULL; t++) {
738 if (vendor == t->rl_vid && product == t->rl_did) {
739 device_set_desc(dev, t->rl_name);
748 * Attach the interface. Allocate softc structures, do ifmedia
749 * setup and ethernet/BPF attach.
752 rl_attach(device_t dev)
754 uint8_t eaddr[ETHER_ADDR_LEN];
759 int error = 0, rid, i;
761 sc = device_get_softc(dev);
765 * Handle power management nonsense.
768 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
769 uint32_t iobase, membase, irq;
771 /* Save important PCI config data. */
772 iobase = pci_read_config(dev, RL_PCI_LOIO, 4);
773 membase = pci_read_config(dev, RL_PCI_LOMEM, 4);
774 irq = pci_read_config(dev, RL_PCI_INTLINE, 4);
776 /* Reset the power state. */
777 device_printf(dev, "chip is is in D%d power mode "
778 "-- setting to D0\n", pci_get_powerstate(dev));
779 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
781 /* Restore PCI config data. */
782 pci_write_config(dev, RL_PCI_LOIO, iobase, 4);
783 pci_write_config(dev, RL_PCI_LOMEM, membase, 4);
784 pci_write_config(dev, RL_PCI_INTLINE, irq, 4);
788 * Map control/status registers.
790 pci_enable_busmaster(dev);
791 pci_enable_io(dev, RL_RES);
794 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, RF_ACTIVE);
796 if (sc->rl_res == NULL) {
797 device_printf(dev, "couldn't map ports/memory\n");
802 sc->rl_btag = rman_get_bustag(sc->rl_res);
803 sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
806 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
807 RF_SHAREABLE | RF_ACTIVE);
809 if (sc->rl_irq == NULL) {
810 device_printf(dev, "couldn't map interrupt\n");
815 callout_init(&sc->rl_stat_timer);
817 /* Reset the adapter. */
820 sc->rl_eecmd_read = RL_EECMD_READ_6BIT;
821 rl_read_eeprom(sc, (uint8_t *)&rl_did, 0, 1, 0);
822 if (rl_did != 0x8129)
823 sc->rl_eecmd_read = RL_EECMD_READ_8BIT;
826 * Get station address from the EEPROM.
828 rl_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0);
829 for (i = 0; i < 3; i++) {
830 eaddr[(i * 2) + 0] = as[i] & 0xff;
831 eaddr[(i * 2) + 1] = as[i] >> 8;
835 * Now read the exact device type from the EEPROM to find
836 * out if it's an 8129 or 8139.
838 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0);
840 if (rl_did == RT_DEVICEID_8139 || rl_did == ACCTON_DEVICEID_5030 ||
841 rl_did == DELTA_DEVICEID_8139 || rl_did == ADDTRON_DEVICEID_8139 ||
842 rl_did == DLINK_DEVICEID_530TXPLUS || rl_did == RT_DEVICEID_8138 ||
843 rl_did == DLINK_DEVICEID_690TXD ||
844 rl_did == COREGA_DEVICEID_FETHERCBTXD ||
845 rl_did == COREGA_DEVICEID_FETHERIICBTXD ||
846 rl_did == PLANEX_DEVICEID_FNW3800TX)
847 sc->rl_type = RL_8139;
848 else if (rl_did == RT_DEVICEID_8129)
849 sc->rl_type = RL_8129;
851 device_printf(dev, "unknown device ID: %x\n", rl_did);
856 #define RL_NSEG_NEW 32
857 error = bus_dma_tag_create(NULL, /* parent */
858 1, 0, /* alignment, boundary */
859 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
860 BUS_SPACE_MAXADDR, /* highaddr */
861 NULL, NULL, /* filter, filterarg */
862 MAXBSIZE, RL_NSEG_NEW, /* maxsize, nsegments */
863 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
864 BUS_DMA_ALLOCNOW, /* flags */
868 device_printf(dev, "can't create parent tag\n");
873 * Now allocate a tag for the DMA descriptor lists.
874 * All of our lists are allocated as a contiguous block
877 error = bus_dma_tag_create(sc->rl_parent_tag, /* parent */
878 1, 0, /* alignment, boundary */
879 BUS_SPACE_MAXADDR, /* lowaddr */
880 BUS_SPACE_MAXADDR, /* highaddr */
881 NULL, NULL, /* filter, filterarg */
882 RL_RXBUFLEN + 1518, 1, /* maxsize, nsegments */
883 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
888 device_printf(dev, "can't create RX tag\n");
893 * Now allocate a chunk of DMA-able memory based on the tag
896 error = bus_dmamem_alloc(sc->rl_tag, (void **)&sc->rl_cdata.rl_rx_buf,
897 BUS_DMA_WAITOK, &sc->rl_cdata.rl_rx_dmamap);
900 device_printf(dev, "can't allocate RX memory!\n");
905 /* Leave a few bytes before the start of the RX ring buffer. */
906 sc->rl_cdata.rl_rx_buf_ptr = sc->rl_cdata.rl_rx_buf;
907 sc->rl_cdata.rl_rx_buf += sizeof(u_int64_t);
910 if (mii_phy_probe(dev, &sc->rl_miibus, rl_ifmedia_upd,
912 device_printf(dev, "MII without any phy!\n");
917 ifp = &sc->arpcom.ac_if;
919 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
920 ifp->if_mtu = ETHERMTU;
921 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
922 ifp->if_ioctl = rl_ioctl;
923 ifp->if_start = rl_start;
924 ifp->if_watchdog = rl_watchdog;
925 ifp->if_init = rl_init;
926 ifp->if_baudrate = 10000000;
927 ifp->if_capabilities = IFCAP_VLAN_MTU;
928 #ifdef DEVICE_POLLING
929 ifp->if_capabilities |= IFCAP_POLLING;
931 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
932 ifq_set_ready(&ifp->if_snd);
935 * Call MI attach routine.
937 ether_ifattach(ifp, eaddr);
939 error = bus_setup_intr(dev, sc->rl_irq, INTR_TYPE_NET, rl_intr,
940 sc, &sc->rl_intrhand, NULL);
943 device_printf(dev, "couldn't set up irq\n");
956 rl_detach(device_t dev)
962 sc = device_get_softc(dev);
963 ifp = &sc->arpcom.ac_if;
967 if (device_is_attached(dev)) {
973 device_delete_child(dev, sc->rl_miibus);
974 bus_generic_detach(dev);
977 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
981 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
983 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res);
985 if (sc->rl_cdata.rl_rx_buf) {
986 bus_dmamap_unload(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap);
987 bus_dmamem_free(sc->rl_tag, sc->rl_cdata.rl_rx_buf,
988 sc->rl_cdata.rl_rx_dmamap);
991 bus_dma_tag_destroy(sc->rl_tag);
992 if (sc->rl_parent_tag)
993 bus_dma_tag_destroy(sc->rl_parent_tag);
999 * Initialize the transmit descriptors.
1002 rl_list_tx_init(struct rl_softc *sc)
1004 struct rl_chain_data *cd;
1008 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1009 cd->rl_tx_chain[i] = NULL;
1011 RL_TXADDR0 + (i * sizeof(uint32_t)), 0x0000000);
1014 sc->rl_cdata.cur_tx = 0;
1015 sc->rl_cdata.last_tx = 0;
1019 * A frame has been uploaded: pass the resulting mbuf chain up to
1020 * the higher level protocols.
1022 * You know there's something wrong with a PCI bus-master chip design
1023 * when you have to use m_devget().
1025 * The receive operation is badly documented in the datasheet, so I'll
1026 * attempt to document it here. The driver provides a buffer area and
1027 * places its base address in the RX buffer start address register.
1028 * The chip then begins copying frames into the RX buffer. Each frame
1029 * is preceded by a 32-bit RX status word which specifies the length
1030 * of the frame and certain other status bits. Each frame (starting with
1031 * the status word) is also 32-bit aligned. The frame length is in the
1032 * first 16 bits of the status word; the lower 15 bits correspond with
1033 * the 'rx status register' mentioned in the datasheet.
1035 * Note: to make the Alpha happy, the frame payload needs to be aligned
1036 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from
1037 * the ring buffer starting at an address two bytes before the actual
1038 * data location. We can then shave off the first two bytes using m_adj().
1039 * The reason we do this is because m_devget() doesn't let us specify an
1040 * offset into the mbuf storage space, so we have to artificially create
1041 * one. The ring is allocated in such a way that there are a few unused
1042 * bytes of space preceecing it so that it will be safe for us to do the
1043 * 2-byte backstep even if reading from the ring at offset 0.
1046 rl_rxeof(struct rl_softc *sc)
1054 uint16_t cur_rx, limit, max_bytes, rx_bytes = 0;
1056 ifp = &sc->arpcom.ac_if;
1058 bus_dmamap_sync(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1059 BUS_DMASYNC_POSTREAD);
1061 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN;
1063 /* Do not try to read past this point. */
1064 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN;
1067 max_bytes = (RL_RXBUFLEN - cur_rx) + limit;
1069 max_bytes = limit - cur_rx;
1071 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) {
1072 #ifdef DEVICE_POLLING
1073 if (ifp->if_flags & IFF_POLLING) {
1074 if (sc->rxcycles <= 0)
1078 #endif /* DEVICE_POLLING */
1079 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx;
1080 rxstat = le32toh(*(uint32_t *)rxbufpos);
1083 * Here's a totally undocumented fact for you. When the
1084 * RealTek chip is in the process of copying a packet into
1085 * RAM for you, the length will be 0xfff0. If you spot a
1086 * packet header with this value, you need to stop. The
1087 * datasheet makes absolutely no mention of this and
1088 * RealTek should be shot for this.
1090 if ((uint16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED)
1093 if ((rxstat & RL_RXSTAT_RXOK) == 0) {
1099 /* No errors; receive the packet. */
1100 total_len = rxstat >> 16;
1101 rx_bytes += total_len + 4;
1104 * XXX The RealTek chip includes the CRC with every
1105 * received frame, and there's no way to turn this
1106 * behavior off (at least, I can't find anything in
1107 * the manual that explains how to do it) so we have
1108 * to trim off the CRC manually.
1110 total_len -= ETHER_CRC_LEN;
1113 * Avoid trying to read more bytes than we know
1114 * the chip has prepared for us.
1116 if (rx_bytes > max_bytes)
1119 rxbufpos = sc->rl_cdata.rl_rx_buf +
1120 ((cur_rx + sizeof(uint32_t)) % RL_RXBUFLEN);
1122 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN))
1123 rxbufpos = sc->rl_cdata.rl_rx_buf;
1125 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos;
1127 if (total_len > wrap) {
1129 * Fool m_devget() into thinking we want to copy
1130 * the whole buffer so we don't end up fragmenting
1133 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1134 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1138 m_adj(m, RL_ETHER_ALIGN);
1139 m_copyback(m, wrap, total_len - wrap,
1140 sc->rl_cdata.rl_rx_buf);
1142 cur_rx = (total_len - wrap + ETHER_CRC_LEN);
1144 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1145 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1149 m_adj(m, RL_ETHER_ALIGN);
1150 cur_rx += total_len + 4 + ETHER_CRC_LEN;
1154 * Round up to 32-bit boundary.
1156 cur_rx = (cur_rx + 3) & ~3;
1157 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16);
1164 (*ifp->if_input)(ifp, m);
1169 * A frame was downloaded to the chip. It's safe for us to clean up
1173 rl_txeof(struct rl_softc *sc)
1178 ifp = &sc->arpcom.ac_if;
1181 * Go through our tx list and free mbufs for those
1182 * frames that have been uploaded.
1185 if (RL_LAST_TXMBUF(sc) == NULL)
1187 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc));
1188 if ((txstat & (RL_TXSTAT_TX_OK | RL_TXSTAT_TX_UNDERRUN |
1189 RL_TXSTAT_TXABRT)) == 0)
1192 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24;
1194 bus_dmamap_unload(sc->rl_tag, RL_LAST_DMAMAP(sc));
1195 bus_dmamap_destroy(sc->rl_tag, RL_LAST_DMAMAP(sc));
1196 m_freem(RL_LAST_TXMBUF(sc));
1197 RL_LAST_TXMBUF(sc) = NULL;
1198 RL_INC(sc->rl_cdata.last_tx);
1200 if (txstat & RL_TXSTAT_TX_UNDERRUN) {
1201 sc->rl_txthresh += 32;
1202 if (sc->rl_txthresh > RL_TX_THRESH_MAX)
1203 sc->rl_txthresh = RL_TX_THRESH_MAX;
1206 if (txstat & RL_TXSTAT_TX_OK) {
1210 if (txstat & (RL_TXSTAT_TXABRT | RL_TXSTAT_OUTOFWIN))
1211 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1213 ifp->if_flags &= ~IFF_OACTIVE;
1214 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx);
1216 if (RL_LAST_TXMBUF(sc) == NULL)
1218 else if (ifp->if_timer == 0)
1225 struct rl_softc *sc = xsc;
1226 struct mii_data *mii;
1231 mii = device_get_softc(sc->rl_miibus);
1236 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1239 #ifdef DEVICE_POLLING
1240 static poll_handler_t rl_poll;
1243 rl_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
1245 struct rl_softc *sc = ifp->if_softc;
1247 if ((ifp->if_capenable & IFCAP_POLLING) == 0) {
1248 ether_poll_deregister(ifp);
1249 cmd = POLL_DEREGISTER;
1251 if (cmd == POLL_DEREGISTER) { /* final call, enable interrupts */
1252 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1256 sc->rxcycles = count;
1259 if (!ifq_is_empty(&ifp->if_snd))
1262 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */
1265 status = CSR_READ_2(sc, RL_ISR);
1266 if (status == 0xffff)
1269 CSR_WRITE_2(sc, RL_ISR, status);
1272 * XXX check behaviour on receiver stalls.
1275 if (status & RL_ISR_SYSTEM_ERR) {
1281 #endif /* DEVICE_POLLING */
1286 struct rl_softc *sc;
1295 ifp = &sc->arpcom.ac_if;
1296 #ifdef DEVICE_POLLING
1297 if (ifp->if_flags & IFF_POLLING)
1299 if ((ifp->if_capenable & IFCAP_POLLING) &&
1300 ether_poll_register(rl_poll, ifp)) { /* ok, disable interrupts */
1301 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1305 #endif /* DEVICE_POLLING */
1308 status = CSR_READ_2(sc, RL_ISR);
1309 /* If the card has gone away, the read returns 0xffff. */
1310 if (status == 0xffff)
1314 CSR_WRITE_2(sc, RL_ISR, status);
1316 if ((status & RL_INTRS) == 0)
1319 if (status & RL_ISR_RX_OK)
1322 if (status & RL_ISR_RX_ERR)
1325 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR))
1328 if (status & RL_ISR_SYSTEM_ERR) {
1335 if (!ifq_is_empty(&ifp->if_snd))
1340 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
1341 * pointers to the fragment pointers.
1344 rl_encap(struct rl_softc *sc, struct mbuf *m_head)
1346 struct mbuf *m_new = NULL;
1349 * The RealTek is brain damaged and wants longword-aligned
1350 * TX buffers, plus we can only have one fragment buffer
1351 * per packet. We have to copy pretty much all the time.
1353 m_new = m_defrag(m_head, MB_DONTWAIT);
1355 if (m_new == NULL) {
1361 /* Pad frames to at least 60 bytes. */
1362 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) {
1364 * Make security concious people happy: zero out the
1365 * bytes in the pad area, since we don't know what
1366 * this mbuf cluster buffer's previous user might
1369 bzero(mtod(m_head, char *) + m_head->m_pkthdr.len,
1370 RL_MIN_FRAMELEN - m_head->m_pkthdr.len);
1371 m_head->m_pkthdr.len +=
1372 (RL_MIN_FRAMELEN - m_head->m_pkthdr.len);
1373 m_head->m_len = m_head->m_pkthdr.len;
1376 RL_CUR_TXMBUF(sc) = m_head;
1382 * Main transmit routine.
1386 rl_start(struct ifnet *ifp)
1388 struct rl_softc *sc;
1389 struct mbuf *m_head = NULL;
1393 while(RL_CUR_TXMBUF(sc) == NULL) {
1394 m_head = ifq_dequeue(&ifp->if_snd);
1398 if (rl_encap(sc, m_head))
1402 * If there's a BPF listener, bounce a copy of this frame
1405 BPF_MTAP(ifp, RL_CUR_TXMBUF(sc));
1408 * Transmit the frame.
1410 bus_dmamap_create(sc->rl_tag, 0, &RL_CUR_DMAMAP(sc));
1411 bus_dmamap_load(sc->rl_tag, RL_CUR_DMAMAP(sc),
1412 mtod(RL_CUR_TXMBUF(sc), void *),
1413 RL_CUR_TXMBUF(sc)->m_pkthdr.len,
1414 rl_dma_map_txbuf, sc, 0);
1415 bus_dmamap_sync(sc->rl_tag, RL_CUR_DMAMAP(sc),
1416 BUS_DMASYNC_PREREAD);
1417 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc),
1418 RL_TXTHRESH(sc->rl_txthresh) |
1419 RL_CUR_TXMBUF(sc)->m_pkthdr.len);
1421 RL_INC(sc->rl_cdata.cur_tx);
1424 * Set a timeout in case the chip goes out to lunch.
1430 * We broke out of the loop because all our TX slots are
1431 * full. Mark the NIC as busy until it drains some of the
1432 * packets from the queue.
1434 if (RL_CUR_TXMBUF(sc) != NULL)
1435 ifp->if_flags |= IFF_OACTIVE;
1441 struct rl_softc *sc = xsc;
1442 struct ifnet *ifp = &sc->arpcom.ac_if;
1443 struct mii_data *mii;
1449 mii = device_get_softc(sc->rl_miibus);
1452 * Cancel pending I/O and free all RX/TX buffers.
1457 * Init our MAC address. Even though the chipset documentation
1458 * doesn't mention it, we need to enter "Config register write enable"
1459 * mode to modify the ID registers.
1461 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG);
1462 CSR_WRITE_STREAM_4(sc, RL_IDR0,
1463 *(uint32_t *)(&sc->arpcom.ac_enaddr[0]));
1464 CSR_WRITE_STREAM_4(sc, RL_IDR4,
1465 *(uint32_t *)(&sc->arpcom.ac_enaddr[4]));
1466 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
1468 /* Init the RX buffer pointer register. */
1469 bus_dmamap_load(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1470 sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN, rl_dma_map_rxbuf,
1472 bus_dmamap_sync(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1473 BUS_DMASYNC_PREWRITE);
1475 /* Init TX descriptors. */
1476 rl_list_tx_init(sc);
1479 * Enable transmit and receive.
1481 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1484 * Set the initial TX and RX configuration.
1486 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1487 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG);
1489 /* Set the individual bit to receive frames for this host only. */
1490 rxcfg = CSR_READ_4(sc, RL_RXCFG);
1491 rxcfg |= RL_RXCFG_RX_INDIV;
1493 /* If we want promiscuous mode, set the allframes bit. */
1494 if (ifp->if_flags & IFF_PROMISC) {
1495 rxcfg |= RL_RXCFG_RX_ALLPHYS;
1496 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1498 rxcfg &= ~RL_RXCFG_RX_ALLPHYS;
1499 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1503 * Set capture broadcast bit to capture broadcast frames.
1505 if (ifp->if_flags & IFF_BROADCAST) {
1506 rxcfg |= RL_RXCFG_RX_BROAD;
1507 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1509 rxcfg &= ~RL_RXCFG_RX_BROAD;
1510 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1514 * Program the multicast filter, if necessary.
1518 #ifdef DEVICE_POLLING
1520 * Only enable interrupts if we are polling, keep them off otherwise.
1522 if (ifp->if_flags & IFF_POLLING)
1523 CSR_WRITE_2(sc, RL_IMR, 0);
1525 #endif /* DEVICE_POLLING */
1527 * Enable interrupts.
1529 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1531 /* Set initial TX threshold */
1532 sc->rl_txthresh = RL_TX_THRESH_INIT;
1534 /* Start RX/TX process. */
1535 CSR_WRITE_4(sc, RL_MISSEDPKT, 0);
1537 /* Enable receiver and transmitter. */
1538 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1542 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX);
1544 ifp->if_flags |= IFF_RUNNING;
1545 ifp->if_flags &= ~IFF_OACTIVE;
1549 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1553 * Set media options.
1556 rl_ifmedia_upd(struct ifnet *ifp)
1558 struct rl_softc *sc;
1559 struct mii_data *mii;
1562 mii = device_get_softc(sc->rl_miibus);
1569 * Report current media status.
1572 rl_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1574 struct rl_softc *sc = ifp->if_softc;
1575 struct mii_data *mii = device_get_softc(sc->rl_miibus);
1578 ifmr->ifm_active = mii->mii_media_active;
1579 ifmr->ifm_status = mii->mii_media_status;
1583 rl_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1585 struct rl_softc *sc = ifp->if_softc;
1586 struct ifreq *ifr = (struct ifreq *) data;
1587 struct mii_data *mii;
1594 if (ifp->if_flags & IFF_UP) {
1597 if (ifp->if_flags & IFF_RUNNING)
1609 mii = device_get_softc(sc->rl_miibus);
1610 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1613 ifp->if_capenable &= ~IFCAP_POLLING;
1614 ifp->if_capenable |= ifr->ifr_reqcap & IFCAP_POLLING;
1617 error = ether_ioctl(ifp, command, data);
1627 rl_watchdog(struct ifnet *ifp)
1629 struct rl_softc *sc = ifp->if_softc;
1634 device_printf(sc->rl_dev, "watchdog timeout\n");
1645 * Stop the adapter and free any mbufs allocated to the
1649 rl_stop(struct rl_softc *sc)
1651 struct ifnet *ifp = &sc->arpcom.ac_if;
1656 callout_stop(&sc->rl_stat_timer);
1657 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1658 #ifdef DEVICE_POLLING
1659 ether_poll_deregister(ifp);
1660 #endif /* DEVICE_POLLING */
1662 CSR_WRITE_1(sc, RL_COMMAND, 0x00);
1663 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1664 bus_dmamap_unload(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap);
1667 * Free the TX list buffers.
1669 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1670 if (sc->rl_cdata.rl_tx_chain[i] != NULL) {
1671 bus_dmamap_unload(sc->rl_tag,
1672 sc->rl_cdata.rl_tx_dmamap[i]);
1673 bus_dmamap_destroy(sc->rl_tag,
1674 sc->rl_cdata.rl_tx_dmamap[i]);
1675 m_freem(sc->rl_cdata.rl_tx_chain[i]);
1676 sc->rl_cdata.rl_tx_chain[i] = NULL;
1677 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
1684 * Stop all chip I/O so that the kernel's probe routines don't
1685 * get confused by errant DMAs when rebooting.
1688 rl_shutdown(device_t dev)
1690 struct rl_softc *sc;
1692 sc = device_get_softc(dev);
1698 * Device suspend routine. Stop the interface and save some PCI
1699 * settings in case the BIOS doesn't restore them properly on
1703 rl_suspend(device_t dev)
1705 struct rl_softc *sc = device_get_softc(dev);
1710 for (i = 0; i < 5; i++)
1711 sc->saved_maps[i] = pci_read_config(dev, PCIR_BAR(i), 4);
1712 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
1713 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
1714 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
1715 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
1723 * Device resume routine. Restore some PCI settings in case the BIOS
1724 * doesn't, re-enable busmastering, and restart the interface if
1727 static int rl_resume(device_t dev)
1729 struct rl_softc *sc = device_get_softc(dev);
1730 struct ifnet *ifp = &sc->arpcom.ac_if;
1733 /* better way to do this? */
1734 for (i = 0; i < 5; i++)
1735 pci_write_config(dev, PCIR_BAR(i), sc->saved_maps[i], 4);
1736 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
1737 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
1738 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
1739 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
1741 /* reenable busmastering */
1742 pci_enable_busmaster(dev);
1743 pci_enable_io(dev, RL_RES);
1745 /* reinitialize interface if necessary */
1746 if (ifp->if_flags & IFF_UP)