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 1.31 2006/08/01 18:07:57 swildner 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 "opt_polling.h"
89 #include <sys/param.h>
90 #include <sys/endian.h>
91 #include <sys/systm.h>
92 #include <sys/sockio.h>
94 #include <sys/malloc.h>
95 #include <sys/kernel.h>
96 #include <sys/module.h>
97 #include <sys/socket.h>
98 #include <sys/serialize.h>
99 #include <sys/thread2.h>
102 #include <net/ifq_var.h>
103 #include <net/if_arp.h>
104 #include <net/ethernet.h>
105 #include <net/if_dl.h>
106 #include <net/if_media.h>
110 #include <machine/bus_pio.h>
111 #include <machine/bus_memio.h>
112 #include <machine/bus.h>
113 #include <machine/resource.h>
115 #include <sys/rman.h>
117 #include <dev/netif/mii_layer/mii.h>
118 #include <dev/netif/mii_layer/miivar.h>
120 #include <bus/pci/pcidevs.h>
121 #include <bus/pci/pcireg.h>
122 #include <bus/pci/pcivar.h>
124 /* "controller miibus0" required. See GENERIC if you get errors here. */
125 #include "miibus_if.h"
128 * Default to using PIO access for this driver. On SMP systems,
129 * there appear to be problems with memory mapped mode: it looks like
130 * doing too many memory mapped access back to back in rapid succession
131 * can hang the bus. I'm inclined to blame this on crummy design/construction
132 * on the part of RealTek. Memory mapped mode does appear to work on
133 * uniprocessor systems though.
135 #define RL_USEIOSPACE
137 #include <dev/netif/rl/if_rlreg.h>
140 * Various supported device vendors/types and their names.
142 static struct rl_type {
147 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8129,
148 "RealTek 8129 10/100BaseTX" },
149 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
150 "RealTek 8139 10/100BaseTX" },
151 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139B,
152 "RealTek 8139 10/100BaseTX CardBus" },
153 { PCI_VENDOR_ACCTON, PCI_PRODUCT_ACCTON_MPX5030,
154 "Accton MPX 5030/5038 10/100BaseTX" },
155 { PCI_VENDOR_DELTA, PCI_PRODUCT_DELTA_8139,
156 "Delta Electronics 8139 10/100BaseTX" },
157 { PCI_VENDOR_ADDTRON, PCI_PRODUCT_ADDTRON_8139,
158 "Addtron Technolgy 8139 10/100BaseTX" },
159 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE530TXPLUS,
160 "D-Link DFE-530TX+ 10/100BaseTX" },
161 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE690TXD,
162 "D-Link DFE-690TX 10/100BaseTX" },
163 { PCI_VENDOR_NORTEL, PCI_PRODUCT_NORTEL_BAYSTACK_21,
164 "Nortel Networks 10/100BaseTX" },
165 { PCI_VENDOR_PEPPERCON, PCI_PRODUCT_PEPPERCON_ROLF,
166 "Peppercon AG ROL/F" },
167 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_CB_TXD,
168 "Corega FEther CB-TXD" },
169 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_2CB_TXD,
170 "Corega FEtherII CB-TXD" },
171 { PCI_VENDOR_PLANEX, PCI_PRODUCT_PLANEX_FNW_3800_TX,
172 "Planex FNW-3800-TX" },
176 static int rl_probe(device_t);
177 static int rl_attach(device_t);
178 static int rl_detach(device_t);
180 static int rl_encap(struct rl_softc *, struct mbuf * );
182 static void rl_rxeof(struct rl_softc *);
183 static void rl_txeof(struct rl_softc *);
184 static void rl_intr(void *);
185 static void rl_tick(void *);
186 static void rl_start(struct ifnet *);
187 static int rl_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
188 static void rl_init(void *);
189 static void rl_stop (struct rl_softc *);
190 static void rl_watchdog(struct ifnet *);
191 static int rl_suspend(device_t);
192 static int rl_resume(device_t);
193 static void rl_shutdown(device_t);
194 static int rl_ifmedia_upd(struct ifnet *);
195 static void rl_ifmedia_sts(struct ifnet *, struct ifmediareq *);
197 static void rl_eeprom_putbyte(struct rl_softc *, int);
198 static void rl_eeprom_getword(struct rl_softc *, int, uint16_t *);
199 static void rl_read_eeprom(struct rl_softc *, caddr_t, int, int, int);
200 static void rl_mii_sync(struct rl_softc *);
201 static void rl_mii_send(struct rl_softc *, uint32_t, int);
202 static int rl_mii_readreg(struct rl_softc *, struct rl_mii_frame *);
203 static int rl_mii_writereg(struct rl_softc *, struct rl_mii_frame *);
205 static int rl_miibus_readreg(device_t, int, int);
206 static int rl_miibus_writereg(device_t, int, int, int);
207 static void rl_miibus_statchg(device_t);
209 static void rl_setmulti(struct rl_softc *);
210 static void rl_reset(struct rl_softc *);
211 static void rl_list_tx_init(struct rl_softc *);
213 static void rl_dma_map_rxbuf(void *, bus_dma_segment_t *, int, int);
214 static void rl_dma_map_txbuf(void *, bus_dma_segment_t *, int, int);
215 #ifdef DEVICE_POLLING
216 static poll_handler_t rl_poll;
220 #define RL_RES SYS_RES_IOPORT
221 #define RL_RID RL_PCI_LOIO
223 #define RL_RES SYS_RES_MEMORY
224 #define RL_RID RL_PCI_LOMEM
227 static device_method_t rl_methods[] = {
228 /* Device interface */
229 DEVMETHOD(device_probe, rl_probe),
230 DEVMETHOD(device_attach, rl_attach),
231 DEVMETHOD(device_detach, rl_detach),
232 DEVMETHOD(device_suspend, rl_suspend),
233 DEVMETHOD(device_resume, rl_resume),
234 DEVMETHOD(device_shutdown, rl_shutdown),
237 DEVMETHOD(bus_print_child, bus_generic_print_child),
238 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
241 DEVMETHOD(miibus_readreg, rl_miibus_readreg),
242 DEVMETHOD(miibus_writereg, rl_miibus_writereg),
243 DEVMETHOD(miibus_statchg, rl_miibus_statchg),
248 static DEFINE_CLASS_0(rl, rl_driver, rl_methods, sizeof(struct rl_softc));
249 static devclass_t rl_devclass;
251 DECLARE_DUMMY_MODULE(if_rl);
252 DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, 0, 0);
253 DRIVER_MODULE(if_rl, cardbus, rl_driver, rl_devclass, 0, 0);
254 DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, 0, 0);
255 MODULE_DEPEND(if_rl, miibus, 1, 1, 1);
258 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) | (x))
261 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) & ~(x))
264 rl_dma_map_rxbuf(void *arg, bus_dma_segment_t *segs, int nseg, int error)
266 struct rl_softc *sc = arg;
268 CSR_WRITE_4(sc, RL_RXADDR, segs->ds_addr & 0xFFFFFFFF);
272 rl_dma_map_txbuf(void *arg, bus_dma_segment_t *segs, int nseg, int error)
274 struct rl_softc *sc = arg;
276 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), segs->ds_addr & 0xFFFFFFFF);
280 * Send a read command and address to the EEPROM, check for ACK.
283 rl_eeprom_putbyte(struct rl_softc *sc, int addr)
287 d = addr | sc->rl_eecmd_read;
290 * Feed in each bit and strobe the clock.
292 for (i = 0x400; i; i >>= 1) {
294 EE_SET(RL_EE_DATAIN);
296 EE_CLR(RL_EE_DATAIN);
306 * Read a word of data stored in the EEPROM at address 'addr.'
309 rl_eeprom_getword(struct rl_softc *sc, int addr, uint16_t *dest)
314 /* Enter EEPROM access mode. */
315 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
318 * Send address of word we want to read.
320 rl_eeprom_putbyte(sc, addr);
322 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
325 * Start reading bits from EEPROM.
327 for (i = 0x8000; i; i >>= 1) {
330 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT)
336 /* Turn off EEPROM access mode. */
337 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
343 * Read a sequence of words from the EEPROM.
346 rl_read_eeprom(struct rl_softc *sc, caddr_t dest, int off, int cnt, int swap)
349 u_int16_t word = 0, *ptr;
351 for (i = 0; i < cnt; i++) {
352 rl_eeprom_getword(sc, off + i, &word);
353 ptr = (u_int16_t *)(dest + (i * 2));
363 * MII access routines are provided for the 8129, which
364 * doesn't have a built-in PHY. For the 8139, we fake things
365 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the
366 * direct access PHY registers.
369 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) | x)
372 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) & ~x)
375 * Sync the PHYs by setting data bit and strobing the clock 32 times.
378 rl_mii_sync(struct rl_softc *sc)
382 MII_SET(RL_MII_DIR|RL_MII_DATAOUT);
384 for (i = 0; i < 32; i++) {
393 * Clock a series of bits through the MII.
396 rl_mii_send(struct rl_softc *sc, uint32_t bits, int cnt)
402 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
404 MII_SET(RL_MII_DATAOUT);
406 MII_CLR(RL_MII_DATAOUT);
415 * Read an PHY register through the MII.
418 rl_mii_readreg(struct rl_softc *sc, struct rl_mii_frame *frame)
423 * Set up frame for RX.
425 frame->mii_stdelim = RL_MII_STARTDELIM;
426 frame->mii_opcode = RL_MII_READOP;
427 frame->mii_turnaround = 0;
430 CSR_WRITE_2(sc, RL_MII, 0);
440 * Send command/address info.
442 rl_mii_send(sc, frame->mii_stdelim, 2);
443 rl_mii_send(sc, frame->mii_opcode, 2);
444 rl_mii_send(sc, frame->mii_phyaddr, 5);
445 rl_mii_send(sc, frame->mii_regaddr, 5);
448 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT));
459 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN;
464 * Now try reading data bits. If the ack failed, we still
465 * need to clock through 16 cycles to keep the PHY(s) in sync.
468 for(i = 0; i < 16; i++) {
475 for (i = 0x8000; i; i >>= 1) {
479 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN)
480 frame->mii_data |= i;
497 * Write to a PHY register through the MII.
500 rl_mii_writereg(struct rl_softc *sc, struct rl_mii_frame *frame)
503 * 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);
538 rl_miibus_readreg(device_t dev, int phy, int reg)
541 struct rl_mii_frame frame;
543 uint16_t rl8139_reg = 0;
545 sc = device_get_softc(dev);
547 if (sc->rl_type == RL_8139) {
548 /* Pretend the internal PHY is only at address 0 */
553 rl8139_reg = RL_BMCR;
556 rl8139_reg = RL_BMSR;
559 rl8139_reg = RL_ANAR;
562 rl8139_reg = RL_ANER;
565 rl8139_reg = RL_LPAR;
572 * Allow the rlphy driver to read the media status
573 * register. If we have a link partner which does not
574 * support NWAY, this is the register which will tell
575 * us the results of parallel detection.
578 rval = CSR_READ_1(sc, RL_MEDIASTAT);
581 device_printf(dev, "bad phy register\n");
584 rval = CSR_READ_2(sc, rl8139_reg);
588 bzero(&frame, sizeof(frame));
590 frame.mii_phyaddr = phy;
591 frame.mii_regaddr = reg;
592 rl_mii_readreg(sc, &frame);
594 return(frame.mii_data);
598 rl_miibus_writereg(device_t dev, int phy, int reg, int data)
601 struct rl_mii_frame frame;
602 u_int16_t rl8139_reg = 0;
604 sc = device_get_softc(dev);
606 if (sc->rl_type == RL_8139) {
607 /* Pretend the internal PHY is only at address 0 */
612 rl8139_reg = RL_BMCR;
615 rl8139_reg = RL_BMSR;
618 rl8139_reg = RL_ANAR;
621 rl8139_reg = RL_ANER;
624 rl8139_reg = RL_LPAR;
630 device_printf(dev, "bad phy register\n");
633 CSR_WRITE_2(sc, rl8139_reg, data);
637 bzero(&frame, sizeof(frame));
639 frame.mii_phyaddr = phy;
640 frame.mii_regaddr = reg;
641 frame.mii_data = data;
643 rl_mii_writereg(sc, &frame);
649 rl_miibus_statchg(device_t dev)
654 * Program the 64-bit multicast hash filter.
657 rl_setmulti(struct rl_softc *sc)
661 uint32_t hashes[2] = { 0, 0 };
662 struct ifmultiaddr *ifma;
666 ifp = &sc->arpcom.ac_if;
668 rxfilt = CSR_READ_4(sc, RL_RXCFG);
670 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
671 rxfilt |= RL_RXCFG_RX_MULTI;
672 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
673 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF);
674 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF);
678 /* first, zot all the existing hash bits */
679 CSR_WRITE_4(sc, RL_MAR0, 0);
680 CSR_WRITE_4(sc, RL_MAR4, 0);
682 /* now program new ones */
683 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
684 if (ifma->ifma_addr->sa_family != AF_LINK)
687 LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
688 ETHER_ADDR_LEN) >> 26;
690 hashes[0] |= (1 << h);
692 hashes[1] |= (1 << (h - 32));
697 rxfilt |= RL_RXCFG_RX_MULTI;
699 rxfilt &= ~RL_RXCFG_RX_MULTI;
701 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
702 CSR_WRITE_4(sc, RL_MAR0, hashes[0]);
703 CSR_WRITE_4(sc, RL_MAR4, hashes[1]);
707 rl_reset(struct rl_softc *sc)
711 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET);
713 for (i = 0; i < RL_TIMEOUT; i++) {
715 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET))
719 device_printf(sc->rl_dev, "reset never completed!\n");
723 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device
724 * IDs against our list and return a device name if we find a match.
726 * Return with a value < 0 to give re(4) a change to attach.
729 rl_probe(device_t dev)
732 uint16_t product = pci_get_device(dev);
733 uint16_t vendor = pci_get_vendor(dev);
735 for (t = rl_devs; t->rl_name != NULL; t++) {
736 if (vendor == t->rl_vid && product == t->rl_did) {
737 device_set_desc(dev, t->rl_name);
746 * Attach the interface. Allocate softc structures, do ifmedia
747 * setup and ethernet/BPF attach.
750 rl_attach(device_t dev)
752 uint8_t eaddr[ETHER_ADDR_LEN];
757 int error = 0, rid, i;
759 sc = device_get_softc(dev);
763 * Handle power management nonsense.
766 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
767 uint32_t iobase, membase, irq;
769 /* Save important PCI config data. */
770 iobase = pci_read_config(dev, RL_PCI_LOIO, 4);
771 membase = pci_read_config(dev, RL_PCI_LOMEM, 4);
772 irq = pci_read_config(dev, RL_PCI_INTLINE, 4);
774 /* Reset the power state. */
775 device_printf(dev, "chip is is in D%d power mode "
776 "-- setting to D0\n", pci_get_powerstate(dev));
777 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
779 /* Restore PCI config data. */
780 pci_write_config(dev, RL_PCI_LOIO, iobase, 4);
781 pci_write_config(dev, RL_PCI_LOMEM, membase, 4);
782 pci_write_config(dev, RL_PCI_INTLINE, irq, 4);
785 pci_enable_busmaster(dev);
788 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, RF_ACTIVE);
790 if (sc->rl_res == NULL) {
791 device_printf(dev, "couldn't map ports/memory\n");
796 sc->rl_btag = rman_get_bustag(sc->rl_res);
797 sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
800 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
801 RF_SHAREABLE | RF_ACTIVE);
803 if (sc->rl_irq == NULL) {
804 device_printf(dev, "couldn't map interrupt\n");
809 callout_init(&sc->rl_stat_timer);
811 /* Reset the adapter. */
814 sc->rl_eecmd_read = RL_EECMD_READ_6BIT;
815 rl_read_eeprom(sc, (uint8_t *)&rl_did, 0, 1, 0);
816 if (rl_did != 0x8129)
817 sc->rl_eecmd_read = RL_EECMD_READ_8BIT;
820 * Get station address from the EEPROM.
822 rl_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0);
823 for (i = 0; i < 3; i++) {
824 eaddr[(i * 2) + 0] = as[i] & 0xff;
825 eaddr[(i * 2) + 1] = as[i] >> 8;
829 * Now read the exact device type from the EEPROM to find
830 * out if it's an 8129 or 8139.
832 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0);
834 if (rl_did == PCI_PRODUCT_REALTEK_RT8139 ||
835 rl_did == PCI_PRODUCT_ACCTON_MPX5030 ||
836 rl_did == PCI_PRODUCT_DELTA_8139 ||
837 rl_did == PCI_PRODUCT_ADDTRON_8139 ||
838 rl_did == PCI_PRODUCT_DLINK_DFE530TXPLUS ||
839 rl_did == PCI_PRODUCT_REALTEK_RT8139B ||
840 rl_did == PCI_PRODUCT_DLINK_DFE690TXD ||
841 rl_did == PCI_PRODUCT_COREGA_CB_TXD ||
842 rl_did == PCI_PRODUCT_COREGA_2CB_TXD ||
843 rl_did == PCI_PRODUCT_PLANEX_FNW_3800_TX)
844 sc->rl_type = RL_8139;
845 else if (rl_did == PCI_PRODUCT_REALTEK_RT8129)
846 sc->rl_type = RL_8129;
848 device_printf(dev, "unknown device ID: %x\n", rl_did);
853 #define RL_NSEG_NEW 32
854 error = bus_dma_tag_create(NULL, /* parent */
855 1, 0, /* alignment, boundary */
856 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
857 BUS_SPACE_MAXADDR, /* highaddr */
858 NULL, NULL, /* filter, filterarg */
859 MAXBSIZE, RL_NSEG_NEW, /* maxsize, nsegments */
860 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
861 BUS_DMA_ALLOCNOW, /* flags */
865 device_printf(dev, "can't create parent tag\n");
870 * Now allocate a tag for the DMA descriptor lists.
871 * All of our lists are allocated as a contiguous block
874 error = bus_dma_tag_create(sc->rl_parent_tag, /* parent */
875 1, 0, /* alignment, boundary */
876 BUS_SPACE_MAXADDR, /* lowaddr */
877 BUS_SPACE_MAXADDR, /* highaddr */
878 NULL, NULL, /* filter, filterarg */
879 RL_RXBUFLEN + 1518, 1, /* maxsize, nsegments */
880 BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
885 device_printf(dev, "can't create RX tag\n");
890 * Now allocate a chunk of DMA-able memory based on the tag
893 error = bus_dmamem_alloc(sc->rl_tag, (void **)&sc->rl_cdata.rl_rx_buf,
894 BUS_DMA_WAITOK, &sc->rl_cdata.rl_rx_dmamap);
897 device_printf(dev, "can't allocate RX memory!\n");
902 /* Leave a few bytes before the start of the RX ring buffer. */
903 sc->rl_cdata.rl_rx_buf_ptr = sc->rl_cdata.rl_rx_buf;
904 sc->rl_cdata.rl_rx_buf += sizeof(u_int64_t);
907 if (mii_phy_probe(dev, &sc->rl_miibus, rl_ifmedia_upd,
909 device_printf(dev, "MII without any phy!\n");
914 ifp = &sc->arpcom.ac_if;
916 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
917 ifp->if_mtu = ETHERMTU;
918 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
919 ifp->if_ioctl = rl_ioctl;
920 ifp->if_start = rl_start;
921 ifp->if_watchdog = rl_watchdog;
922 ifp->if_init = rl_init;
923 ifp->if_baudrate = 10000000;
924 ifp->if_capabilities = IFCAP_VLAN_MTU;
925 #ifdef DEVICE_POLLING
926 ifp->if_poll = rl_poll;
928 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
929 ifq_set_ready(&ifp->if_snd);
932 * Call MI attach routine.
934 ether_ifattach(ifp, eaddr, NULL);
936 error = bus_setup_intr(dev, sc->rl_irq, INTR_NETSAFE, rl_intr,
937 sc, &sc->rl_intrhand, ifp->if_serializer);
940 device_printf(dev, "couldn't set up irq\n");
953 rl_detach(device_t dev)
958 sc = device_get_softc(dev);
959 ifp = &sc->arpcom.ac_if;
961 if (device_is_attached(dev)) {
962 lwkt_serialize_enter(ifp->if_serializer);
964 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
965 lwkt_serialize_exit(ifp->if_serializer);
971 device_delete_child(dev, sc->rl_miibus);
972 bus_generic_detach(dev);
975 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
977 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res);
979 if (sc->rl_cdata.rl_rx_buf) {
980 bus_dmamap_unload(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap);
981 bus_dmamem_free(sc->rl_tag, sc->rl_cdata.rl_rx_buf,
982 sc->rl_cdata.rl_rx_dmamap);
985 bus_dma_tag_destroy(sc->rl_tag);
986 if (sc->rl_parent_tag)
987 bus_dma_tag_destroy(sc->rl_parent_tag);
993 * Initialize the transmit descriptors.
996 rl_list_tx_init(struct rl_softc *sc)
998 struct rl_chain_data *cd;
1002 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1003 cd->rl_tx_chain[i] = NULL;
1005 RL_TXADDR0 + (i * sizeof(uint32_t)), 0x0000000);
1008 sc->rl_cdata.cur_tx = 0;
1009 sc->rl_cdata.last_tx = 0;
1013 * A frame has been uploaded: pass the resulting mbuf chain up to
1014 * the higher level protocols.
1016 * You know there's something wrong with a PCI bus-master chip design
1017 * when you have to use m_devget().
1019 * The receive operation is badly documented in the datasheet, so I'll
1020 * attempt to document it here. The driver provides a buffer area and
1021 * places its base address in the RX buffer start address register.
1022 * The chip then begins copying frames into the RX buffer. Each frame
1023 * is preceded by a 32-bit RX status word which specifies the length
1024 * of the frame and certain other status bits. Each frame (starting with
1025 * the status word) is also 32-bit aligned. The frame length is in the
1026 * first 16 bits of the status word; the lower 15 bits correspond with
1027 * the 'rx status register' mentioned in the datasheet.
1029 * Note: to make the Alpha happy, the frame payload needs to be aligned
1030 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from
1031 * the ring buffer starting at an address two bytes before the actual
1032 * data location. We can then shave off the first two bytes using m_adj().
1033 * The reason we do this is because m_devget() doesn't let us specify an
1034 * offset into the mbuf storage space, so we have to artificially create
1035 * one. The ring is allocated in such a way that there are a few unused
1036 * bytes of space preceecing it so that it will be safe for us to do the
1037 * 2-byte backstep even if reading from the ring at offset 0.
1040 rl_rxeof(struct rl_softc *sc)
1048 uint16_t cur_rx, limit, max_bytes, rx_bytes = 0;
1050 ifp = &sc->arpcom.ac_if;
1052 bus_dmamap_sync(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1053 BUS_DMASYNC_POSTREAD);
1055 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN;
1057 /* Do not try to read past this point. */
1058 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN;
1061 max_bytes = (RL_RXBUFLEN - cur_rx) + limit;
1063 max_bytes = limit - cur_rx;
1065 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) {
1066 #ifdef DEVICE_POLLING
1067 if (ifp->if_flags & IFF_POLLING) {
1068 if (sc->rxcycles <= 0)
1072 #endif /* DEVICE_POLLING */
1073 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx;
1074 rxstat = le32toh(*(uint32_t *)rxbufpos);
1077 * Here's a totally undocumented fact for you. When the
1078 * RealTek chip is in the process of copying a packet into
1079 * RAM for you, the length will be 0xfff0. If you spot a
1080 * packet header with this value, you need to stop. The
1081 * datasheet makes absolutely no mention of this and
1082 * RealTek should be shot for this.
1084 if ((uint16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED)
1087 if ((rxstat & RL_RXSTAT_RXOK) == 0) {
1093 /* No errors; receive the packet. */
1094 total_len = rxstat >> 16;
1095 rx_bytes += total_len + 4;
1098 * XXX The RealTek chip includes the CRC with every
1099 * received frame, and there's no way to turn this
1100 * behavior off (at least, I can't find anything in
1101 * the manual that explains how to do it) so we have
1102 * to trim off the CRC manually.
1104 total_len -= ETHER_CRC_LEN;
1107 * Avoid trying to read more bytes than we know
1108 * the chip has prepared for us.
1110 if (rx_bytes > max_bytes)
1113 rxbufpos = sc->rl_cdata.rl_rx_buf +
1114 ((cur_rx + sizeof(uint32_t)) % RL_RXBUFLEN);
1116 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN))
1117 rxbufpos = sc->rl_cdata.rl_rx_buf;
1119 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos;
1121 if (total_len > wrap) {
1123 * Fool m_devget() into thinking we want to copy
1124 * the whole buffer so we don't end up fragmenting
1127 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1128 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1132 m_adj(m, RL_ETHER_ALIGN);
1133 m_copyback(m, wrap, total_len - wrap,
1134 sc->rl_cdata.rl_rx_buf);
1136 cur_rx = (total_len - wrap + ETHER_CRC_LEN);
1138 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1139 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1143 m_adj(m, RL_ETHER_ALIGN);
1144 cur_rx += total_len + 4 + ETHER_CRC_LEN;
1148 * Round up to 32-bit boundary.
1150 cur_rx = (cur_rx + 3) & ~3;
1151 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16);
1158 ifp->if_input(ifp, m);
1163 * A frame was downloaded to the chip. It's safe for us to clean up
1167 rl_txeof(struct rl_softc *sc)
1172 ifp = &sc->arpcom.ac_if;
1175 * Go through our tx list and free mbufs for those
1176 * frames that have been uploaded.
1179 if (RL_LAST_TXMBUF(sc) == NULL)
1181 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc));
1182 if ((txstat & (RL_TXSTAT_TX_OK | RL_TXSTAT_TX_UNDERRUN |
1183 RL_TXSTAT_TXABRT)) == 0)
1186 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24;
1188 bus_dmamap_unload(sc->rl_tag, RL_LAST_DMAMAP(sc));
1189 bus_dmamap_destroy(sc->rl_tag, RL_LAST_DMAMAP(sc));
1190 m_freem(RL_LAST_TXMBUF(sc));
1191 RL_LAST_TXMBUF(sc) = NULL;
1192 RL_INC(sc->rl_cdata.last_tx);
1194 if (txstat & RL_TXSTAT_TX_UNDERRUN) {
1195 sc->rl_txthresh += 32;
1196 if (sc->rl_txthresh > RL_TX_THRESH_MAX)
1197 sc->rl_txthresh = RL_TX_THRESH_MAX;
1200 if (txstat & RL_TXSTAT_TX_OK) {
1204 if (txstat & (RL_TXSTAT_TXABRT | RL_TXSTAT_OUTOFWIN))
1205 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1207 ifp->if_flags &= ~IFF_OACTIVE;
1208 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx);
1210 if (RL_LAST_TXMBUF(sc) == NULL)
1212 else if (ifp->if_timer == 0)
1219 struct rl_softc *sc = xsc;
1220 struct mii_data *mii;
1222 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1224 mii = device_get_softc(sc->rl_miibus);
1227 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1229 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1232 #ifdef DEVICE_POLLING
1235 rl_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
1237 struct rl_softc *sc = ifp->if_softc;
1241 /* disable interrupts */
1242 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1244 case POLL_DEREGISTER:
1245 /* enable interrupts */
1246 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1249 sc->rxcycles = count;
1252 if (!ifq_is_empty(&ifp->if_snd))
1255 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */
1258 status = CSR_READ_2(sc, RL_ISR);
1259 if (status == 0xffff)
1262 CSR_WRITE_2(sc, RL_ISR, status);
1265 * XXX check behaviour on receiver stalls.
1268 if (status & RL_ISR_SYSTEM_ERR) {
1276 #endif /* DEVICE_POLLING */
1281 struct rl_softc *sc;
1290 ifp = &sc->arpcom.ac_if;
1293 status = CSR_READ_2(sc, RL_ISR);
1294 /* If the card has gone away, the read returns 0xffff. */
1295 if (status == 0xffff)
1299 CSR_WRITE_2(sc, RL_ISR, status);
1301 if ((status & RL_INTRS) == 0)
1304 if (status & RL_ISR_RX_OK)
1307 if (status & RL_ISR_RX_ERR)
1310 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR))
1313 if (status & RL_ISR_SYSTEM_ERR) {
1320 if (!ifq_is_empty(&ifp->if_snd))
1325 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
1326 * pointers to the fragment pointers.
1329 rl_encap(struct rl_softc *sc, struct mbuf *m_head)
1331 struct mbuf *m_new = NULL;
1334 * The RealTek is brain damaged and wants longword-aligned
1335 * TX buffers, plus we can only have one fragment buffer
1336 * per packet. We have to copy pretty much all the time.
1338 m_new = m_defrag(m_head, MB_DONTWAIT);
1340 if (m_new == NULL) {
1346 /* Pad frames to at least 60 bytes. */
1347 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) {
1349 * Make security concious people happy: zero out the
1350 * bytes in the pad area, since we don't know what
1351 * this mbuf cluster buffer's previous user might
1354 bzero(mtod(m_head, char *) + m_head->m_pkthdr.len,
1355 RL_MIN_FRAMELEN - m_head->m_pkthdr.len);
1356 m_head->m_pkthdr.len +=
1357 (RL_MIN_FRAMELEN - m_head->m_pkthdr.len);
1358 m_head->m_len = m_head->m_pkthdr.len;
1361 RL_CUR_TXMBUF(sc) = m_head;
1367 * Main transmit routine.
1371 rl_start(struct ifnet *ifp)
1373 struct rl_softc *sc;
1374 struct mbuf *m_head = NULL;
1378 while(RL_CUR_TXMBUF(sc) == NULL) {
1379 m_head = ifq_dequeue(&ifp->if_snd, NULL);
1383 if (rl_encap(sc, m_head))
1387 * If there's a BPF listener, bounce a copy of this frame
1390 BPF_MTAP(ifp, RL_CUR_TXMBUF(sc));
1393 * Transmit the frame.
1395 bus_dmamap_create(sc->rl_tag, 0, &RL_CUR_DMAMAP(sc));
1396 bus_dmamap_load(sc->rl_tag, RL_CUR_DMAMAP(sc),
1397 mtod(RL_CUR_TXMBUF(sc), void *),
1398 RL_CUR_TXMBUF(sc)->m_pkthdr.len,
1399 rl_dma_map_txbuf, sc, 0);
1400 bus_dmamap_sync(sc->rl_tag, RL_CUR_DMAMAP(sc),
1401 BUS_DMASYNC_PREREAD);
1402 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc),
1403 RL_TXTHRESH(sc->rl_txthresh) |
1404 RL_CUR_TXMBUF(sc)->m_pkthdr.len);
1406 RL_INC(sc->rl_cdata.cur_tx);
1409 * Set a timeout in case the chip goes out to lunch.
1415 * We broke out of the loop because all our TX slots are
1416 * full. Mark the NIC as busy until it drains some of the
1417 * packets from the queue.
1419 if (RL_CUR_TXMBUF(sc) != NULL)
1420 ifp->if_flags |= IFF_OACTIVE;
1426 struct rl_softc *sc = xsc;
1427 struct ifnet *ifp = &sc->arpcom.ac_if;
1428 struct mii_data *mii;
1431 mii = device_get_softc(sc->rl_miibus);
1434 * Cancel pending I/O and free all RX/TX buffers.
1439 * Init our MAC address. Even though the chipset documentation
1440 * doesn't mention it, we need to enter "Config register write enable"
1441 * mode to modify the ID registers.
1443 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG);
1444 CSR_WRITE_STREAM_4(sc, RL_IDR0,
1445 *(uint32_t *)(&sc->arpcom.ac_enaddr[0]));
1446 CSR_WRITE_STREAM_4(sc, RL_IDR4,
1447 *(uint32_t *)(&sc->arpcom.ac_enaddr[4]));
1448 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
1450 /* Init the RX buffer pointer register. */
1451 bus_dmamap_load(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1452 sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN, rl_dma_map_rxbuf,
1454 bus_dmamap_sync(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap,
1455 BUS_DMASYNC_PREWRITE);
1457 /* Init TX descriptors. */
1458 rl_list_tx_init(sc);
1461 * Enable transmit and receive.
1463 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1466 * Set the initial TX and RX configuration.
1468 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1469 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG);
1471 /* Set the individual bit to receive frames for this host only. */
1472 rxcfg = CSR_READ_4(sc, RL_RXCFG);
1473 rxcfg |= RL_RXCFG_RX_INDIV;
1475 /* If we want promiscuous mode, set the allframes bit. */
1476 if (ifp->if_flags & IFF_PROMISC) {
1477 rxcfg |= RL_RXCFG_RX_ALLPHYS;
1478 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1480 rxcfg &= ~RL_RXCFG_RX_ALLPHYS;
1481 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1485 * Set capture broadcast bit to capture broadcast frames.
1487 if (ifp->if_flags & IFF_BROADCAST) {
1488 rxcfg |= RL_RXCFG_RX_BROAD;
1489 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1491 rxcfg &= ~RL_RXCFG_RX_BROAD;
1492 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1496 * Program the multicast filter, if necessary.
1500 #ifdef DEVICE_POLLING
1502 * Only enable interrupts if we are polling, keep them off otherwise.
1504 if (ifp->if_flags & IFF_POLLING)
1505 CSR_WRITE_2(sc, RL_IMR, 0);
1507 #endif /* DEVICE_POLLING */
1509 * Enable interrupts.
1511 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1513 /* Set initial TX threshold */
1514 sc->rl_txthresh = RL_TX_THRESH_INIT;
1516 /* Start RX/TX process. */
1517 CSR_WRITE_4(sc, RL_MISSEDPKT, 0);
1519 /* Enable receiver and transmitter. */
1520 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1524 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX);
1526 ifp->if_flags |= IFF_RUNNING;
1527 ifp->if_flags &= ~IFF_OACTIVE;
1529 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1533 * Set media options.
1536 rl_ifmedia_upd(struct ifnet *ifp)
1538 struct rl_softc *sc;
1539 struct mii_data *mii;
1542 mii = device_get_softc(sc->rl_miibus);
1549 * Report current media status.
1552 rl_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1554 struct rl_softc *sc = ifp->if_softc;
1555 struct mii_data *mii = device_get_softc(sc->rl_miibus);
1558 ifmr->ifm_active = mii->mii_media_active;
1559 ifmr->ifm_status = mii->mii_media_status;
1563 rl_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1565 struct rl_softc *sc = ifp->if_softc;
1566 struct ifreq *ifr = (struct ifreq *) data;
1567 struct mii_data *mii;
1572 if (ifp->if_flags & IFF_UP) {
1575 if (ifp->if_flags & IFF_RUNNING)
1587 mii = device_get_softc(sc->rl_miibus);
1588 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1593 error = ether_ioctl(ifp, command, data);
1601 rl_watchdog(struct ifnet *ifp)
1603 struct rl_softc *sc = ifp->if_softc;
1605 device_printf(sc->rl_dev, "watchdog timeout\n");
1607 lwkt_serialize_enter(ifp->if_serializer);
1615 lwkt_serialize_exit(ifp->if_serializer);
1619 * Stop the adapter and free any mbufs allocated to the
1623 rl_stop(struct rl_softc *sc)
1625 struct ifnet *ifp = &sc->arpcom.ac_if;
1630 callout_stop(&sc->rl_stat_timer);
1631 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1633 CSR_WRITE_1(sc, RL_COMMAND, 0x00);
1634 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1635 bus_dmamap_unload(sc->rl_tag, sc->rl_cdata.rl_rx_dmamap);
1638 * Free the TX list buffers.
1640 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1641 if (sc->rl_cdata.rl_tx_chain[i] != NULL) {
1642 bus_dmamap_unload(sc->rl_tag,
1643 sc->rl_cdata.rl_tx_dmamap[i]);
1644 bus_dmamap_destroy(sc->rl_tag,
1645 sc->rl_cdata.rl_tx_dmamap[i]);
1646 m_freem(sc->rl_cdata.rl_tx_chain[i]);
1647 sc->rl_cdata.rl_tx_chain[i] = NULL;
1648 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
1655 * Stop all chip I/O so that the kernel's probe routines don't
1656 * get confused by errant DMAs when rebooting.
1659 rl_shutdown(device_t dev)
1661 struct rl_softc *sc;
1663 sc = device_get_softc(dev);
1664 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1666 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1670 * Device suspend routine. Stop the interface and save some PCI
1671 * settings in case the BIOS doesn't restore them properly on
1675 rl_suspend(device_t dev)
1677 struct rl_softc *sc = device_get_softc(dev);
1680 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1683 for (i = 0; i < 5; i++)
1684 sc->saved_maps[i] = pci_read_config(dev, PCIR_BAR(i), 4);
1685 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
1686 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
1687 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
1688 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
1692 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1697 * Device resume routine. Restore some PCI settings in case the BIOS
1698 * doesn't, re-enable busmastering, and restart the interface if
1701 static int rl_resume(device_t dev)
1703 struct rl_softc *sc = device_get_softc(dev);
1704 struct ifnet *ifp = &sc->arpcom.ac_if;
1707 lwkt_serialize_enter(ifp->if_serializer);
1709 /* better way to do this? */
1710 for (i = 0; i < 5; i++)
1711 pci_write_config(dev, PCIR_BAR(i), sc->saved_maps[i], 4);
1712 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
1713 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
1714 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
1715 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
1717 /* reenable busmastering */
1718 pci_enable_busmaster(dev);
1719 pci_enable_io(dev, RL_RES);
1721 /* reinitialize interface if necessary */
1722 if (ifp->if_flags & IFF_UP)
1726 lwkt_serialize_exit(ifp->if_serializer);