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 $
36 * RealTek 8129/8139 PCI NIC driver
38 * Supports several extremely cheap PCI 10/100 adapters based on
39 * the RealTek chipset. Datasheets can be obtained from
42 * Written by Bill Paul <wpaul@ctr.columbia.edu>
43 * Electrical Engineering Department
44 * Columbia University, New York City
48 * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is
49 * probably the worst PCI ethernet controller ever made, with the possible
50 * exception of the FEAST chip made by SMC. The 8139 supports bus-master
51 * DMA, but it has a terrible interface that nullifies any performance
52 * gains that bus-master DMA usually offers.
54 * For transmission, the chip offers a series of four TX descriptor
55 * registers. Each transmit frame must be in a contiguous buffer, aligned
56 * on a longword (32-bit) boundary. This means we almost always have to
57 * do mbuf copies in order to transmit a frame, except in the unlikely
58 * case where a) the packet fits into a single mbuf, and b) the packet
59 * is 32-bit aligned within the mbuf's data area. The presence of only
60 * four descriptor registers means that we can never have more than four
61 * packets queued for transmission at any one time.
63 * Reception is not much better. The driver has to allocate a single large
64 * buffer area (up to 64K in size) into which the chip will DMA received
65 * frames. Because we don't know where within this region received packets
66 * will begin or end, we have no choice but to copy data from the buffer
67 * area into mbufs in order to pass the packets up to the higher protocol
70 * It's impossible given this rotten design to really achieve decent
71 * performance at 100Mbps, unless you happen to have a 400Mhz PII or
72 * some equally overmuscled CPU to drive it.
74 * On the bright side, the 8139 does have a built-in PHY, although
75 * rather than using an MDIO serial interface like most other NICs, the
76 * PHY registers are directly accessible through the 8139's register
77 * space. The 8139 supports autonegotiation, as well as a 64-bit multicast
80 * The 8129 chip is an older version of the 8139 that uses an external PHY
81 * chip. The 8129 has a serial MDIO interface for accessing the MII where
82 * the 8139 lets you directly access the on-board PHY registers. We need
83 * to select which interface to use depending on the chip type.
86 #include "opt_ifpoll.h"
88 #include <sys/param.h>
89 #include <sys/endian.h>
90 #include <sys/systm.h>
91 #include <sys/sockio.h>
93 #include <sys/malloc.h>
94 #include <sys/kernel.h>
95 #include <sys/module.h>
96 #include <sys/socket.h>
97 #include <sys/serialize.h>
100 #include <sys/thread2.h>
101 #include <sys/interrupt.h>
104 #include <net/ifq_var.h>
105 #include <net/if_arp.h>
106 #include <net/ethernet.h>
107 #include <net/if_dl.h>
108 #include <net/if_media.h>
109 #include <net/if_poll.h>
113 #include <dev/netif/mii_layer/mii.h>
114 #include <dev/netif/mii_layer/miivar.h>
116 #include <bus/pci/pcidevs.h>
117 #include <bus/pci/pcireg.h>
118 #include <bus/pci/pcivar.h>
120 /* "controller miibus0" required. See GENERIC if you get errors here. */
121 #include "miibus_if.h"
124 * Default to using PIO access for this driver. On SMP systems,
125 * there appear to be problems with memory mapped mode: it looks like
126 * doing too many memory mapped access back to back in rapid succession
127 * can hang the bus. I'm inclined to blame this on crummy design/construction
128 * on the part of RealTek. Memory mapped mode does appear to work on
129 * uniprocessor systems though.
131 #define RL_USEIOSPACE
133 #include <dev/netif/rl/if_rlreg.h>
136 * Various supported device vendors/types and their names.
138 static struct rl_type {
143 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8129,
144 "RealTek 8129 10/100BaseTX" },
145 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
146 "RealTek 8139 10/100BaseTX" },
147 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139B,
148 "RealTek 8139 10/100BaseTX CardBus" },
149 { PCI_VENDOR_ACCTON, PCI_PRODUCT_ACCTON_MPX5030,
150 "Accton MPX 5030/5038 10/100BaseTX" },
151 { PCI_VENDOR_DELTA, PCI_PRODUCT_DELTA_8139,
152 "Delta Electronics 8139 10/100BaseTX" },
153 { PCI_VENDOR_ADDTRON, PCI_PRODUCT_ADDTRON_8139,
154 "Addtron Technology 8139 10/100BaseTX" },
155 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE530TXPLUS,
156 "D-Link DFE-530TX+ 10/100BaseTX" },
157 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE690TXD,
158 "D-Link DFE-690TX 10/100BaseTX" },
159 { PCI_VENDOR_NORTEL, PCI_PRODUCT_NORTEL_BAYSTACK_21,
160 "Nortel Networks 10/100BaseTX" },
161 { PCI_VENDOR_PEPPERCON, PCI_PRODUCT_PEPPERCON_ROLF,
162 "Peppercon AG ROL/F" },
163 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_CB_TXD,
164 "Corega FEther CB-TXD" },
165 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_2CB_TXD,
166 "Corega FEtherII CB-TXD" },
167 { PCI_VENDOR_PLANEX, PCI_PRODUCT_PLANEX_FNW_3800_TX,
168 "Planex FNW-3800-TX" },
172 static int rl_probe(device_t);
173 static int rl_attach(device_t);
174 static int rl_detach(device_t);
176 static int rl_encap(struct rl_softc *, struct mbuf * );
178 static void rl_rxeof(struct rl_softc *);
179 static void rl_txeof(struct rl_softc *);
180 static void rl_intr(void *);
181 static void rl_tick(void *);
182 static void rl_start(struct ifnet *, struct ifaltq_subque *);
183 static int rl_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
184 static void rl_init(void *);
185 static void rl_stop (struct rl_softc *);
186 static void rl_watchdog(struct ifnet *);
187 static int rl_suspend(device_t);
188 static int rl_resume(device_t);
189 static void rl_shutdown(device_t);
190 static int rl_ifmedia_upd(struct ifnet *);
191 static void rl_ifmedia_sts(struct ifnet *, struct ifmediareq *);
193 static void rl_eeprom_putbyte(struct rl_softc *, int);
194 static void rl_eeprom_getword(struct rl_softc *, int, uint16_t *);
195 static void rl_read_eeprom(struct rl_softc *, caddr_t, int, int, int);
196 static void rl_mii_sync(struct rl_softc *);
197 static void rl_mii_send(struct rl_softc *, uint32_t, int);
198 static int rl_mii_readreg(struct rl_softc *, struct rl_mii_frame *);
199 static int rl_mii_writereg(struct rl_softc *, struct rl_mii_frame *);
201 static int rl_miibus_readreg(device_t, int, int);
202 static int rl_miibus_writereg(device_t, int, int, int);
203 static void rl_miibus_statchg(device_t);
205 static void rl_setmulti(struct rl_softc *);
206 static void rl_reset(struct rl_softc *);
207 static void rl_list_tx_init(struct rl_softc *);
210 static void rl_npoll(struct ifnet *, struct ifpoll_info *);
211 static void rl_npoll_compat(struct ifnet *, void *, int);
214 static int rl_dma_alloc(struct rl_softc *);
215 static void rl_dma_free(struct rl_softc *);
218 #define RL_RES SYS_RES_IOPORT
219 #define RL_RID RL_PCI_LOIO
221 #define RL_RES SYS_RES_MEMORY
222 #define RL_RID RL_PCI_LOMEM
225 static device_method_t rl_methods[] = {
226 /* Device interface */
227 DEVMETHOD(device_probe, rl_probe),
228 DEVMETHOD(device_attach, rl_attach),
229 DEVMETHOD(device_detach, rl_detach),
230 DEVMETHOD(device_suspend, rl_suspend),
231 DEVMETHOD(device_resume, rl_resume),
232 DEVMETHOD(device_shutdown, rl_shutdown),
235 DEVMETHOD(bus_print_child, bus_generic_print_child),
236 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
239 DEVMETHOD(miibus_readreg, rl_miibus_readreg),
240 DEVMETHOD(miibus_writereg, rl_miibus_writereg),
241 DEVMETHOD(miibus_statchg, rl_miibus_statchg),
246 static DEFINE_CLASS_0(rl, rl_driver, rl_methods, sizeof(struct rl_softc));
247 static devclass_t rl_devclass;
249 DECLARE_DUMMY_MODULE(if_rl);
250 DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, NULL, NULL);
251 DRIVER_MODULE(if_rl, cardbus, rl_driver, rl_devclass, NULL, NULL);
252 DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, NULL, NULL);
253 MODULE_DEPEND(if_rl, miibus, 1, 1, 1);
256 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) | (x))
259 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) & ~(x))
262 * Send a read command and address to the EEPROM, check for ACK.
265 rl_eeprom_putbyte(struct rl_softc *sc, int addr)
269 d = addr | sc->rl_eecmd_read;
272 * Feed in each bit and strobe the clock.
274 for (i = 0x400; i; i >>= 1) {
276 EE_SET(RL_EE_DATAIN);
278 EE_CLR(RL_EE_DATAIN);
288 * Read a word of data stored in the EEPROM at address 'addr.'
291 rl_eeprom_getword(struct rl_softc *sc, int addr, uint16_t *dest)
296 /* Enter EEPROM access mode. */
297 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
300 * Send address of word we want to read.
302 rl_eeprom_putbyte(sc, addr);
304 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
307 * Start reading bits from EEPROM.
309 for (i = 0x8000; i; i >>= 1) {
312 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT)
318 /* Turn off EEPROM access mode. */
319 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
325 * Read a sequence of words from the EEPROM.
328 rl_read_eeprom(struct rl_softc *sc, caddr_t dest, int off, int cnt, int swap)
331 u_int16_t word = 0, *ptr;
333 for (i = 0; i < cnt; i++) {
334 rl_eeprom_getword(sc, off + i, &word);
335 ptr = (u_int16_t *)(dest + (i * 2));
345 * MII access routines are provided for the 8129, which
346 * doesn't have a built-in PHY. For the 8139, we fake things
347 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the
348 * direct access PHY registers.
351 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) | x)
354 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) & ~x)
357 * Sync the PHYs by setting data bit and strobing the clock 32 times.
360 rl_mii_sync(struct rl_softc *sc)
364 MII_SET(RL_MII_DIR|RL_MII_DATAOUT);
366 for (i = 0; i < 32; i++) {
375 * Clock a series of bits through the MII.
378 rl_mii_send(struct rl_softc *sc, uint32_t bits, int cnt)
384 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
386 MII_SET(RL_MII_DATAOUT);
388 MII_CLR(RL_MII_DATAOUT);
397 * Read an PHY register through the MII.
400 rl_mii_readreg(struct rl_softc *sc, struct rl_mii_frame *frame)
405 * Set up frame for RX.
407 frame->mii_stdelim = RL_MII_STARTDELIM;
408 frame->mii_opcode = RL_MII_READOP;
409 frame->mii_turnaround = 0;
412 CSR_WRITE_2(sc, RL_MII, 0);
422 * Send command/address info.
424 rl_mii_send(sc, frame->mii_stdelim, 2);
425 rl_mii_send(sc, frame->mii_opcode, 2);
426 rl_mii_send(sc, frame->mii_phyaddr, 5);
427 rl_mii_send(sc, frame->mii_regaddr, 5);
430 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT));
441 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN;
446 * Now try reading data bits. If the ack failed, we still
447 * need to clock through 16 cycles to keep the PHY(s) in sync.
450 for(i = 0; i < 16; i++) {
457 for (i = 0x8000; i; i >>= 1) {
461 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN)
462 frame->mii_data |= i;
479 * Write to a PHY register through the MII.
482 rl_mii_writereg(struct rl_softc *sc, struct rl_mii_frame *frame)
485 * Set up frame for TX.
487 frame->mii_stdelim = RL_MII_STARTDELIM;
488 frame->mii_opcode = RL_MII_WRITEOP;
489 frame->mii_turnaround = RL_MII_TURNAROUND;
492 * Turn on data output.
498 rl_mii_send(sc, frame->mii_stdelim, 2);
499 rl_mii_send(sc, frame->mii_opcode, 2);
500 rl_mii_send(sc, frame->mii_phyaddr, 5);
501 rl_mii_send(sc, frame->mii_regaddr, 5);
502 rl_mii_send(sc, frame->mii_turnaround, 2);
503 rl_mii_send(sc, frame->mii_data, 16);
520 rl_miibus_readreg(device_t dev, int phy, int reg)
523 struct rl_mii_frame frame;
525 uint16_t rl8139_reg = 0;
527 sc = device_get_softc(dev);
529 if (sc->rl_type == RL_8139) {
530 /* Pretend the internal PHY is only at address 0 */
535 rl8139_reg = RL_BMCR;
538 rl8139_reg = RL_BMSR;
541 rl8139_reg = RL_ANAR;
544 rl8139_reg = RL_ANER;
547 rl8139_reg = RL_LPAR;
554 * Allow the rlphy driver to read the media status
555 * register. If we have a link partner which does not
556 * support NWAY, this is the register which will tell
557 * us the results of parallel detection.
560 rval = CSR_READ_1(sc, RL_MEDIASTAT);
563 device_printf(dev, "bad phy register\n");
566 rval = CSR_READ_2(sc, rl8139_reg);
570 bzero(&frame, sizeof(frame));
572 frame.mii_phyaddr = phy;
573 frame.mii_regaddr = reg;
574 rl_mii_readreg(sc, &frame);
576 return(frame.mii_data);
580 rl_miibus_writereg(device_t dev, int phy, int reg, int data)
583 struct rl_mii_frame frame;
584 u_int16_t rl8139_reg = 0;
586 sc = device_get_softc(dev);
588 if (sc->rl_type == RL_8139) {
589 /* Pretend the internal PHY is only at address 0 */
594 rl8139_reg = RL_BMCR;
597 rl8139_reg = RL_BMSR;
600 rl8139_reg = RL_ANAR;
603 rl8139_reg = RL_ANER;
606 rl8139_reg = RL_LPAR;
612 device_printf(dev, "bad phy register\n");
615 CSR_WRITE_2(sc, rl8139_reg, data);
619 bzero(&frame, sizeof(frame));
621 frame.mii_phyaddr = phy;
622 frame.mii_regaddr = reg;
623 frame.mii_data = data;
625 rl_mii_writereg(sc, &frame);
631 rl_miibus_statchg(device_t dev)
636 * Program the 64-bit multicast hash filter.
639 rl_setmulti(struct rl_softc *sc)
643 uint32_t hashes[2] = { 0, 0 };
644 struct ifmultiaddr *ifma;
648 ifp = &sc->arpcom.ac_if;
650 rxfilt = CSR_READ_4(sc, RL_RXCFG);
652 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
653 rxfilt |= RL_RXCFG_RX_MULTI;
654 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
655 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF);
656 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF);
660 /* first, zot all the existing hash bits */
661 CSR_WRITE_4(sc, RL_MAR0, 0);
662 CSR_WRITE_4(sc, RL_MAR4, 0);
664 /* now program new ones */
665 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
666 if (ifma->ifma_addr->sa_family != AF_LINK)
669 LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
670 ETHER_ADDR_LEN) >> 26;
672 hashes[0] |= (1 << h);
674 hashes[1] |= (1 << (h - 32));
679 rxfilt |= RL_RXCFG_RX_MULTI;
681 rxfilt &= ~RL_RXCFG_RX_MULTI;
683 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
684 CSR_WRITE_4(sc, RL_MAR0, hashes[0]);
685 CSR_WRITE_4(sc, RL_MAR4, hashes[1]);
689 rl_reset(struct rl_softc *sc)
693 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET);
695 for (i = 0; i < RL_TIMEOUT; i++) {
697 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET))
701 device_printf(sc->rl_dev, "reset never completed!\n");
705 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device
706 * IDs against our list and return a device name if we find a match.
708 * Return with a value < 0 to give re(4) a change to attach.
711 rl_probe(device_t dev)
714 uint16_t product = pci_get_device(dev);
715 uint16_t vendor = pci_get_vendor(dev);
717 for (t = rl_devs; t->rl_name != NULL; t++) {
718 if (vendor == t->rl_vid && product == t->rl_did) {
719 device_set_desc(dev, t->rl_name);
728 * Attach the interface. Allocate softc structures, do ifmedia
729 * setup and ethernet/BPF attach.
732 rl_attach(device_t dev)
734 uint8_t eaddr[ETHER_ADDR_LEN];
739 int error = 0, rid, i;
741 sc = device_get_softc(dev);
745 * Handle power management nonsense.
748 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
749 uint32_t iobase, membase, irq;
751 /* Save important PCI config data. */
752 iobase = pci_read_config(dev, RL_PCI_LOIO, 4);
753 membase = pci_read_config(dev, RL_PCI_LOMEM, 4);
754 irq = pci_read_config(dev, RL_PCI_INTLINE, 4);
756 /* Reset the power state. */
757 device_printf(dev, "chip is in D%d power mode "
758 "-- setting to D0\n", pci_get_powerstate(dev));
759 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
761 /* Restore PCI config data. */
762 pci_write_config(dev, RL_PCI_LOIO, iobase, 4);
763 pci_write_config(dev, RL_PCI_LOMEM, membase, 4);
764 pci_write_config(dev, RL_PCI_INTLINE, irq, 4);
767 pci_enable_busmaster(dev);
770 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, RF_ACTIVE);
772 if (sc->rl_res == NULL) {
773 device_printf(dev, "couldn't map ports/memory\n");
778 sc->rl_btag = rman_get_bustag(sc->rl_res);
779 sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
782 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
783 RF_SHAREABLE | RF_ACTIVE);
785 if (sc->rl_irq == NULL) {
786 device_printf(dev, "couldn't map interrupt\n");
791 callout_init(&sc->rl_stat_timer);
793 /* Reset the adapter. */
796 sc->rl_eecmd_read = RL_EECMD_READ_6BIT;
797 rl_read_eeprom(sc, (uint8_t *)&rl_did, 0, 1, 0);
798 if (rl_did != 0x8129)
799 sc->rl_eecmd_read = RL_EECMD_READ_8BIT;
802 * Get station address from the EEPROM.
804 rl_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0);
805 for (i = 0; i < 3; i++) {
806 eaddr[(i * 2) + 0] = as[i] & 0xff;
807 eaddr[(i * 2) + 1] = as[i] >> 8;
811 * Now read the exact device type from the EEPROM to find
812 * out if it's an 8129 or 8139.
814 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0);
816 if (rl_did == PCI_PRODUCT_REALTEK_RT8139 ||
817 rl_did == PCI_PRODUCT_ACCTON_MPX5030 ||
818 rl_did == PCI_PRODUCT_DELTA_8139 ||
819 rl_did == PCI_PRODUCT_ADDTRON_8139 ||
820 rl_did == PCI_PRODUCT_DLINK_DFE530TXPLUS ||
821 rl_did == PCI_PRODUCT_REALTEK_RT8139B ||
822 rl_did == PCI_PRODUCT_DLINK_DFE690TXD ||
823 rl_did == PCI_PRODUCT_COREGA_CB_TXD ||
824 rl_did == PCI_PRODUCT_COREGA_2CB_TXD ||
825 rl_did == PCI_PRODUCT_PLANEX_FNW_3800_TX) {
826 sc->rl_type = RL_8139;
827 } else if (rl_did == PCI_PRODUCT_REALTEK_RT8129) {
828 sc->rl_type = RL_8129;
830 device_printf(dev, "unknown device ID: %x\n", rl_did);
831 sc->rl_type = RL_8139;
833 * Read RL_IDR register to get ethernet address as accessing
834 * EEPROM may not extract correct address.
836 for (i = 0; i < ETHER_ADDR_LEN; i++)
837 eaddr[i] = CSR_READ_1(sc, RL_IDR0 + i);
840 error = rl_dma_alloc(sc);
845 if (mii_phy_probe(dev, &sc->rl_miibus, rl_ifmedia_upd,
847 device_printf(dev, "MII without any phy!\n");
852 ifp = &sc->arpcom.ac_if;
854 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
855 ifp->if_mtu = ETHERMTU;
856 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
857 ifp->if_ioctl = rl_ioctl;
858 ifp->if_start = rl_start;
859 ifp->if_watchdog = rl_watchdog;
860 ifp->if_init = rl_init;
861 ifp->if_baudrate = 10000000;
862 ifp->if_capabilities = IFCAP_VLAN_MTU;
864 ifp->if_npoll = rl_npoll;
866 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
867 ifq_set_ready(&ifp->if_snd);
870 * Call MI attach routine.
872 ether_ifattach(ifp, eaddr, NULL);
875 ifpoll_compat_setup(&sc->rl_npoll, NULL, NULL, device_get_unit(dev),
879 error = bus_setup_intr(dev, sc->rl_irq, INTR_MPSAFE, rl_intr,
880 sc, &sc->rl_intrhand, ifp->if_serializer);
883 device_printf(dev, "couldn't set up irq\n");
888 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->rl_irq));
898 rl_detach(device_t dev)
903 sc = device_get_softc(dev);
904 ifp = &sc->arpcom.ac_if;
906 if (device_is_attached(dev)) {
907 lwkt_serialize_enter(ifp->if_serializer);
909 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
910 lwkt_serialize_exit(ifp->if_serializer);
916 device_delete_child(dev, sc->rl_miibus);
917 bus_generic_detach(dev);
920 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
922 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res);
930 * Initialize the transmit descriptors.
933 rl_list_tx_init(struct rl_softc *sc)
935 struct rl_chain_data *cd;
939 for (i = 0; i < RL_TX_LIST_CNT; i++) {
940 cd->rl_tx_chain[i] = NULL;
941 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
945 sc->rl_cdata.cur_tx = 0;
946 sc->rl_cdata.last_tx = 0;
950 * A frame has been uploaded: pass the resulting mbuf chain up to
951 * the higher level protocols.
953 * You know there's something wrong with a PCI bus-master chip design
954 * when you have to use m_devget().
956 * The receive operation is badly documented in the datasheet, so I'll
957 * attempt to document it here. The driver provides a buffer area and
958 * places its base address in the RX buffer start address register.
959 * The chip then begins copying frames into the RX buffer. Each frame
960 * is preceded by a 32-bit RX status word which specifies the length
961 * of the frame and certain other status bits. Each frame (starting with
962 * the status word) is also 32-bit aligned. The frame length is in the
963 * first 16 bits of the status word; the lower 15 bits correspond with
964 * the 'rx status register' mentioned in the datasheet.
966 * Note: to make the Alpha happy, the frame payload needs to be aligned
967 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from
968 * the ring buffer starting at an address two bytes before the actual
969 * data location. We can then shave off the first two bytes using m_adj().
970 * The reason we do this is because m_devget() doesn't let us specify an
971 * offset into the mbuf storage space, so we have to artificially create
972 * one. The ring is allocated in such a way that there are a few unused
973 * bytes of space preceecing it so that it will be safe for us to do the
974 * 2-byte backstep even if reading from the ring at offset 0.
977 rl_rxeof(struct rl_softc *sc)
984 int wrap = 0, done = 0;
985 uint16_t cur_rx = 0, max_bytes = 0, rx_bytes = 0;
987 ifp = &sc->arpcom.ac_if;
989 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) {
995 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) %
998 /* Do not try to read past this point. */
999 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN;
1001 max_bytes = (RL_RXBUFLEN - cur_rx) + limit;
1003 max_bytes = limit - cur_rx;
1005 #ifdef IFPOLL_ENABLE
1006 if (ifp->if_flags & IFF_NPOLLING) {
1007 if (sc->rxcycles <= 0)
1011 #endif /* IFPOLL_ENABLE */
1012 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx;
1013 rxstat = le32toh(*(uint32_t *)rxbufpos);
1016 * Here's a totally undocumented fact for you. When the
1017 * RealTek chip is in the process of copying a packet into
1018 * RAM for you, the length will be 0xfff0. If you spot a
1019 * packet header with this value, you need to stop. The
1020 * datasheet makes absolutely no mention of this and
1021 * RealTek should be shot for this.
1023 if ((uint16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED)
1026 if ((rxstat & RL_RXSTAT_RXOK) == 0) {
1032 /* No errors; receive the packet. */
1033 total_len = rxstat >> 16;
1034 rx_bytes += total_len + 4;
1037 * XXX The RealTek chip includes the CRC with every
1038 * received frame, and there's no way to turn this
1039 * behavior off (at least, I can't find anything in
1040 * the manual that explains how to do it) so we have
1041 * to trim off the CRC manually.
1043 total_len -= ETHER_CRC_LEN;
1046 * Avoid trying to read more bytes than we know
1047 * the chip has prepared for us.
1049 if (rx_bytes > max_bytes)
1052 rxbufpos = sc->rl_cdata.rl_rx_buf +
1053 ((cur_rx + sizeof(uint32_t)) % RL_RXBUFLEN);
1055 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN))
1056 rxbufpos = sc->rl_cdata.rl_rx_buf;
1058 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos;
1060 if (total_len > wrap) {
1062 * Fool m_devget() into thinking we want to copy
1063 * the whole buffer so we don't end up fragmenting
1066 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1067 wrap + RL_ETHER_ALIGN, 0, ifp, NULL);
1071 m_adj(m, RL_ETHER_ALIGN);
1072 m_copyback(m, wrap, total_len - wrap,
1073 sc->rl_cdata.rl_rx_buf);
1075 cur_rx = (total_len - wrap + ETHER_CRC_LEN);
1077 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1078 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1082 m_adj(m, RL_ETHER_ALIGN);
1083 cur_rx += total_len + 4 + ETHER_CRC_LEN;
1087 * Round up to 32-bit boundary.
1089 cur_rx = (cur_rx + 3) & ~3;
1090 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16);
1097 ifp->if_input(ifp, m);
1102 * A frame was downloaded to the chip. It's safe for us to clean up
1106 rl_txeof(struct rl_softc *sc)
1111 ifp = &sc->arpcom.ac_if;
1114 * Go through our tx list and free mbufs for those
1115 * frames that have been uploaded.
1118 if (RL_LAST_TXMBUF(sc) == NULL)
1120 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc));
1121 if ((txstat & (RL_TXSTAT_TX_OK | RL_TXSTAT_TX_UNDERRUN |
1122 RL_TXSTAT_TXABRT)) == 0)
1125 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24;
1127 bus_dmamap_unload(sc->rl_cdata.rl_tx_tag, RL_LAST_DMAMAP(sc));
1128 m_freem(RL_LAST_TXMBUF(sc));
1129 RL_LAST_TXMBUF(sc) = NULL;
1130 RL_INC(sc->rl_cdata.last_tx);
1132 if (txstat & RL_TXSTAT_TX_UNDERRUN) {
1133 sc->rl_txthresh += 32;
1134 if (sc->rl_txthresh > RL_TX_THRESH_MAX)
1135 sc->rl_txthresh = RL_TX_THRESH_MAX;
1138 if (txstat & RL_TXSTAT_TX_OK) {
1142 if (txstat & (RL_TXSTAT_TXABRT | RL_TXSTAT_OUTOFWIN))
1143 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1145 ifq_clr_oactive(&ifp->if_snd);
1146 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx);
1148 if (RL_LAST_TXMBUF(sc) == NULL)
1150 else if (ifp->if_timer == 0)
1157 struct rl_softc *sc = xsc;
1158 struct mii_data *mii;
1160 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1162 mii = device_get_softc(sc->rl_miibus);
1165 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1167 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1170 #ifdef IFPOLL_ENABLE
1173 rl_npoll_compat(struct ifnet *ifp, void *arg __unused, int count)
1175 struct rl_softc *sc = ifp->if_softc;
1177 ASSERT_SERIALIZED(ifp->if_serializer);
1179 sc->rxcycles = count;
1182 if (!ifq_is_empty(&ifp->if_snd))
1185 if (sc->rl_npoll.ifpc_stcount-- == 0) {
1188 sc->rl_npoll.ifpc_stcount = sc->rl_npoll.ifpc_stfrac;
1190 status = CSR_READ_2(sc, RL_ISR);
1191 if (status == 0xffff)
1194 CSR_WRITE_2(sc, RL_ISR, status);
1197 * XXX check behaviour on receiver stalls.
1200 if (status & RL_ISR_SYSTEM_ERR) {
1208 rl_npoll(struct ifnet *ifp, struct ifpoll_info *info)
1210 struct rl_softc *sc = ifp->if_softc;
1212 ASSERT_SERIALIZED(ifp->if_serializer);
1215 int cpuid = sc->rl_npoll.ifpc_cpuid;
1217 info->ifpi_rx[cpuid].poll_func = rl_npoll_compat;
1218 info->ifpi_rx[cpuid].arg = NULL;
1219 info->ifpi_rx[cpuid].serializer = ifp->if_serializer;
1221 if (ifp->if_flags & IFF_RUNNING) {
1222 /* disable interrupts */
1223 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1224 sc->rl_npoll.ifpc_stcount = 0;
1226 ifq_set_cpuid(&ifp->if_snd, cpuid);
1228 if (ifp->if_flags & IFF_RUNNING) {
1229 /* enable interrupts */
1230 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1232 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->rl_irq));
1236 #endif /* IFPOLL_ENABLE */
1241 struct rl_softc *sc;
1250 ifp = &sc->arpcom.ac_if;
1253 status = CSR_READ_2(sc, RL_ISR);
1254 /* If the card has gone away, the read returns 0xffff. */
1255 if (status == 0xffff)
1259 CSR_WRITE_2(sc, RL_ISR, status);
1261 if ((status & RL_INTRS) == 0)
1264 if (status & RL_ISR_RX_OK)
1267 if (status & RL_ISR_RX_ERR)
1270 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR))
1273 if (status & RL_ISR_SYSTEM_ERR) {
1280 if (!ifq_is_empty(&ifp->if_snd))
1285 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
1286 * pointers to the fragment pointers.
1289 rl_encap(struct rl_softc *sc, struct mbuf *m_head)
1291 struct mbuf *m_new = NULL;
1292 bus_dma_segment_t seg;
1296 * The RealTek is brain damaged and wants longword-aligned
1297 * TX buffers, plus we can only have one fragment buffer
1298 * per packet. We have to copy pretty much all the time.
1300 m_new = m_defrag(m_head, MB_DONTWAIT);
1301 if (m_new == NULL) {
1307 /* Pad frames to at least 60 bytes. */
1308 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) {
1309 error = m_devpad(m_head, RL_MIN_FRAMELEN);
1316 /* Extract physical address. */
1317 error = bus_dmamap_load_mbuf_segment(sc->rl_cdata.rl_tx_tag,
1318 RL_CUR_DMAMAP(sc), m_head,
1319 &seg, 1, &nseg, BUS_DMA_NOWAIT);
1325 /* Sync the loaded TX buffer. */
1326 bus_dmamap_sync(sc->rl_cdata.rl_tx_tag, RL_CUR_DMAMAP(sc),
1327 BUS_DMASYNC_PREWRITE);
1330 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), seg.ds_addr);
1331 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc),
1332 RL_TXTHRESH(sc->rl_txthresh) | seg.ds_len);
1334 RL_CUR_TXMBUF(sc) = m_head;
1339 * Main transmit routine.
1343 rl_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
1345 struct rl_softc *sc = ifp->if_softc;
1346 struct mbuf *m_head = NULL;
1348 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
1350 if ((ifp->if_flags & IFF_RUNNING) == 0 || ifq_is_oactive(&ifp->if_snd))
1353 while (RL_CUR_TXMBUF(sc) == NULL) {
1354 m_head = ifq_dequeue(&ifp->if_snd, NULL);
1358 if (rl_encap(sc, m_head))
1362 * If there's a BPF listener, bounce a copy of this frame
1365 BPF_MTAP(ifp, RL_CUR_TXMBUF(sc));
1367 RL_INC(sc->rl_cdata.cur_tx);
1370 * Set a timeout in case the chip goes out to lunch.
1376 * We broke out of the loop because all our TX slots are
1377 * full. Mark the NIC as busy until it drains some of the
1378 * packets from the queue.
1380 if (RL_CUR_TXMBUF(sc) != NULL)
1381 ifq_set_oactive(&ifp->if_snd);
1387 struct rl_softc *sc = xsc;
1388 struct ifnet *ifp = &sc->arpcom.ac_if;
1389 struct mii_data *mii;
1392 mii = device_get_softc(sc->rl_miibus);
1395 * Cancel pending I/O and free all RX/TX buffers.
1400 * Init our MAC address. Even though the chipset documentation
1401 * doesn't mention it, we need to enter "Config register write enable"
1402 * mode to modify the ID registers.
1404 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG);
1405 CSR_WRITE_STREAM_4(sc, RL_IDR0,
1406 *(uint32_t *)(&sc->arpcom.ac_enaddr[0]));
1407 CSR_WRITE_STREAM_4(sc, RL_IDR4,
1408 *(uint32_t *)(&sc->arpcom.ac_enaddr[4]));
1409 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
1411 /* Init the RX buffer pointer register. */
1412 CSR_WRITE_4(sc, RL_RXADDR, sc->rl_cdata.rl_rx_buf_paddr);
1414 /* Init TX descriptors. */
1415 rl_list_tx_init(sc);
1418 * Enable transmit and receive.
1420 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1423 * Set the initial TX and RX configuration.
1425 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1426 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG);
1428 /* Set the individual bit to receive frames for this host only. */
1429 rxcfg = CSR_READ_4(sc, RL_RXCFG);
1430 rxcfg |= RL_RXCFG_RX_INDIV;
1432 /* If we want promiscuous mode, set the allframes bit. */
1433 if (ifp->if_flags & IFF_PROMISC) {
1434 rxcfg |= RL_RXCFG_RX_ALLPHYS;
1435 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1437 rxcfg &= ~RL_RXCFG_RX_ALLPHYS;
1438 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1442 * Set capture broadcast bit to capture broadcast frames.
1444 if (ifp->if_flags & IFF_BROADCAST) {
1445 rxcfg |= RL_RXCFG_RX_BROAD;
1446 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1448 rxcfg &= ~RL_RXCFG_RX_BROAD;
1449 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1453 * Program the multicast filter, if necessary.
1457 #ifdef IFPOLL_ENABLE
1459 * Only enable interrupts if we are polling, keep them off otherwise.
1461 if (ifp->if_flags & IFF_NPOLLING) {
1462 CSR_WRITE_2(sc, RL_IMR, 0);
1463 sc->rl_npoll.ifpc_stcount = 0;
1465 #endif /* IFPOLL_ENABLE */
1467 * Enable interrupts.
1469 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1471 /* Set initial TX threshold */
1472 sc->rl_txthresh = RL_TX_THRESH_INIT;
1474 /* Start RX/TX process. */
1475 CSR_WRITE_4(sc, RL_MISSEDPKT, 0);
1477 /* Enable receiver and transmitter. */
1478 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1482 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX);
1484 ifp->if_flags |= IFF_RUNNING;
1485 ifq_clr_oactive(&ifp->if_snd);
1487 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1491 * Set media options.
1494 rl_ifmedia_upd(struct ifnet *ifp)
1496 struct rl_softc *sc;
1497 struct mii_data *mii;
1500 mii = device_get_softc(sc->rl_miibus);
1507 * Report current media status.
1510 rl_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1512 struct rl_softc *sc = ifp->if_softc;
1513 struct mii_data *mii = device_get_softc(sc->rl_miibus);
1516 ifmr->ifm_active = mii->mii_media_active;
1517 ifmr->ifm_status = mii->mii_media_status;
1521 rl_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1523 struct rl_softc *sc = ifp->if_softc;
1524 struct ifreq *ifr = (struct ifreq *) data;
1525 struct mii_data *mii;
1530 if (ifp->if_flags & IFF_UP) {
1533 if (ifp->if_flags & IFF_RUNNING)
1545 mii = device_get_softc(sc->rl_miibus);
1546 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1551 error = ether_ioctl(ifp, command, data);
1559 rl_watchdog(struct ifnet *ifp)
1561 struct rl_softc *sc = ifp->if_softc;
1563 device_printf(sc->rl_dev, "watchdog timeout\n");
1573 * Stop the adapter and free any mbufs allocated to the
1577 rl_stop(struct rl_softc *sc)
1579 struct ifnet *ifp = &sc->arpcom.ac_if;
1584 callout_stop(&sc->rl_stat_timer);
1585 ifp->if_flags &= ~IFF_RUNNING;
1586 ifq_clr_oactive(&ifp->if_snd);
1588 CSR_WRITE_1(sc, RL_COMMAND, 0x00);
1589 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1592 * Free the TX list buffers.
1594 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1595 if (sc->rl_cdata.rl_tx_chain[i] != NULL) {
1596 bus_dmamap_unload(sc->rl_cdata.rl_tx_tag,
1597 sc->rl_cdata.rl_tx_dmamap[i]);
1598 m_freem(sc->rl_cdata.rl_tx_chain[i]);
1599 sc->rl_cdata.rl_tx_chain[i] = NULL;
1600 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
1607 * Stop all chip I/O so that the kernel's probe routines don't
1608 * get confused by errant DMAs when rebooting.
1611 rl_shutdown(device_t dev)
1613 struct rl_softc *sc;
1615 sc = device_get_softc(dev);
1616 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1618 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1622 * Device suspend routine. Stop the interface and save some PCI
1623 * settings in case the BIOS doesn't restore them properly on
1627 rl_suspend(device_t dev)
1629 struct rl_softc *sc = device_get_softc(dev);
1632 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1635 for (i = 0; i < 5; i++)
1636 sc->saved_maps[i] = pci_read_config(dev, PCIR_BAR(i), 4);
1637 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
1638 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
1639 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
1640 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
1644 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1649 * Device resume routine. Restore some PCI settings in case the BIOS
1650 * doesn't, re-enable busmastering, and restart the interface if
1654 rl_resume(device_t dev)
1656 struct rl_softc *sc = device_get_softc(dev);
1657 struct ifnet *ifp = &sc->arpcom.ac_if;
1660 lwkt_serialize_enter(ifp->if_serializer);
1662 /* better way to do this? */
1663 for (i = 0; i < 5; i++)
1664 pci_write_config(dev, PCIR_BAR(i), sc->saved_maps[i], 4);
1665 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
1666 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
1667 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
1668 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
1670 /* reenable busmastering */
1671 pci_enable_busmaster(dev);
1672 pci_enable_io(dev, RL_RES);
1674 /* reinitialize interface if necessary */
1675 if (ifp->if_flags & IFF_UP)
1679 lwkt_serialize_exit(ifp->if_serializer);
1684 rl_dma_alloc(struct rl_softc *sc)
1689 error = bus_dma_tag_create(NULL, /* parent */
1690 1, 0, /* alignment, boundary */
1691 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
1692 BUS_SPACE_MAXADDR, /* highaddr */
1693 NULL, NULL, /* filter, filterarg */
1694 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
1696 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
1698 &sc->rl_parent_tag);
1700 device_printf(sc->rl_dev, "can't create parent tag\n");
1704 /* Allocate a chunk of coherent memory for RX */
1705 error = bus_dmamem_coherent(sc->rl_parent_tag, 1, 0,
1706 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1707 RL_RXBUFLEN + 1518, BUS_DMA_WAITOK, &dmem);
1711 sc->rl_cdata.rl_rx_tag = dmem.dmem_tag;
1712 sc->rl_cdata.rl_rx_dmamap = dmem.dmem_map;
1713 sc->rl_cdata.rl_rx_buf_ptr = dmem.dmem_addr;
1715 /* NOTE: Apply same adjustment to vaddr and paddr */
1716 sc->rl_cdata.rl_rx_buf = sc->rl_cdata.rl_rx_buf_ptr + sizeof(uint64_t);
1717 sc->rl_cdata.rl_rx_buf_paddr = dmem.dmem_busaddr + sizeof(uint64_t);
1720 * Allocate TX mbuf's DMA tag and maps
1722 error = bus_dma_tag_create(sc->rl_parent_tag,/* parent */
1723 RL_TXBUF_ALIGN, 0, /* alignment, boundary */
1724 BUS_SPACE_MAXADDR, /* lowaddr */
1725 BUS_SPACE_MAXADDR, /* highaddr */
1726 NULL, NULL, /* filter, filterarg */
1727 MCLBYTES, /* maxsize */
1729 MCLBYTES, /* maxsegsize */
1730 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK |
1731 BUS_DMA_ALIGNED, /* flags */
1732 &sc->rl_cdata.rl_tx_tag);
1734 device_printf(sc->rl_dev, "can't create TX mbuf tag\n");
1738 for (i = 0; i < RL_TX_LIST_CNT; ++i) {
1739 error = bus_dmamap_create(sc->rl_cdata.rl_tx_tag,
1740 BUS_DMA_WAITOK, &sc->rl_cdata.rl_tx_dmamap[i]);
1744 for (j = 0; j < i; ++j) {
1745 bus_dmamap_destroy(sc->rl_cdata.rl_tx_tag,
1746 sc->rl_cdata.rl_tx_dmamap[j]);
1748 bus_dma_tag_destroy(sc->rl_cdata.rl_tx_tag);
1749 sc->rl_cdata.rl_tx_tag = NULL;
1751 device_printf(sc->rl_dev, "can't create TX mbuf map\n");
1759 rl_dma_free(struct rl_softc *sc)
1761 if (sc->rl_cdata.rl_tx_tag != NULL) {
1764 for (i = 0; i < RL_TX_LIST_CNT; ++i) {
1765 bus_dmamap_destroy(sc->rl_cdata.rl_tx_tag,
1766 sc->rl_cdata.rl_tx_dmamap[i]);
1768 bus_dma_tag_destroy(sc->rl_cdata.rl_tx_tag);
1771 if (sc->rl_cdata.rl_rx_tag != NULL) {
1772 bus_dmamap_unload(sc->rl_cdata.rl_rx_tag,
1773 sc->rl_cdata.rl_rx_dmamap);
1774 /* NOTE: Use rl_rx_buf_ptr here */
1775 bus_dmamem_free(sc->rl_cdata.rl_rx_tag,
1776 sc->rl_cdata.rl_rx_buf_ptr,
1777 sc->rl_cdata.rl_rx_dmamap);
1778 bus_dma_tag_destroy(sc->rl_cdata.rl_rx_tag);
1781 if (sc->rl_parent_tag)
1782 bus_dma_tag_destroy(sc->rl_parent_tag);