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_polling.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>
112 #include <dev/netif/mii_layer/mii.h>
113 #include <dev/netif/mii_layer/miivar.h>
115 #include <bus/pci/pcidevs.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 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8129,
143 "RealTek 8129 10/100BaseTX" },
144 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139,
145 "RealTek 8139 10/100BaseTX" },
146 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139B,
147 "RealTek 8139 10/100BaseTX CardBus" },
148 { PCI_VENDOR_ACCTON, PCI_PRODUCT_ACCTON_MPX5030,
149 "Accton MPX 5030/5038 10/100BaseTX" },
150 { PCI_VENDOR_DELTA, PCI_PRODUCT_DELTA_8139,
151 "Delta Electronics 8139 10/100BaseTX" },
152 { PCI_VENDOR_ADDTRON, PCI_PRODUCT_ADDTRON_8139,
153 "Addtron Technology 8139 10/100BaseTX" },
154 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE530TXPLUS,
155 "D-Link DFE-530TX+ 10/100BaseTX" },
156 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE690TXD,
157 "D-Link DFE-690TX 10/100BaseTX" },
158 { PCI_VENDOR_NORTEL, PCI_PRODUCT_NORTEL_BAYSTACK_21,
159 "Nortel Networks 10/100BaseTX" },
160 { PCI_VENDOR_PEPPERCON, PCI_PRODUCT_PEPPERCON_ROLF,
161 "Peppercon AG ROL/F" },
162 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_CB_TXD,
163 "Corega FEther CB-TXD" },
164 { PCI_VENDOR_COREGA, PCI_PRODUCT_COREGA_2CB_TXD,
165 "Corega FEtherII CB-TXD" },
166 { PCI_VENDOR_PLANEX, PCI_PRODUCT_PLANEX_FNW_3800_TX,
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 #ifdef DEVICE_POLLING
209 static poll_handler_t rl_poll;
212 static int rl_dma_alloc(struct rl_softc *);
213 static void rl_dma_free(struct rl_softc *);
216 #define RL_RES SYS_RES_IOPORT
217 #define RL_RID RL_PCI_LOIO
219 #define RL_RES SYS_RES_MEMORY
220 #define RL_RID RL_PCI_LOMEM
223 static device_method_t rl_methods[] = {
224 /* Device interface */
225 DEVMETHOD(device_probe, rl_probe),
226 DEVMETHOD(device_attach, rl_attach),
227 DEVMETHOD(device_detach, rl_detach),
228 DEVMETHOD(device_suspend, rl_suspend),
229 DEVMETHOD(device_resume, rl_resume),
230 DEVMETHOD(device_shutdown, rl_shutdown),
233 DEVMETHOD(bus_print_child, bus_generic_print_child),
234 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
237 DEVMETHOD(miibus_readreg, rl_miibus_readreg),
238 DEVMETHOD(miibus_writereg, rl_miibus_writereg),
239 DEVMETHOD(miibus_statchg, rl_miibus_statchg),
244 static DEFINE_CLASS_0(rl, rl_driver, rl_methods, sizeof(struct rl_softc));
245 static devclass_t rl_devclass;
247 DECLARE_DUMMY_MODULE(if_rl);
248 DRIVER_MODULE(if_rl, pci, rl_driver, rl_devclass, NULL, NULL);
249 DRIVER_MODULE(if_rl, cardbus, rl_driver, rl_devclass, NULL, NULL);
250 DRIVER_MODULE(miibus, rl, miibus_driver, miibus_devclass, NULL, NULL);
251 MODULE_DEPEND(if_rl, miibus, 1, 1, 1);
254 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) | (x))
257 CSR_WRITE_1(sc, RL_EECMD, CSR_READ_1(sc, RL_EECMD) & ~(x))
260 * Send a read command and address to the EEPROM, check for ACK.
263 rl_eeprom_putbyte(struct rl_softc *sc, int addr)
267 d = addr | sc->rl_eecmd_read;
270 * Feed in each bit and strobe the clock.
272 for (i = 0x400; i; i >>= 1) {
274 EE_SET(RL_EE_DATAIN);
276 EE_CLR(RL_EE_DATAIN);
286 * Read a word of data stored in the EEPROM at address 'addr.'
289 rl_eeprom_getword(struct rl_softc *sc, int addr, uint16_t *dest)
294 /* Enter EEPROM access mode. */
295 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
298 * Send address of word we want to read.
300 rl_eeprom_putbyte(sc, addr);
302 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL);
305 * Start reading bits from EEPROM.
307 for (i = 0x8000; i; i >>= 1) {
310 if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT)
316 /* Turn off EEPROM access mode. */
317 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
323 * Read a sequence of words from the EEPROM.
326 rl_read_eeprom(struct rl_softc *sc, caddr_t dest, int off, int cnt, int swap)
329 u_int16_t word = 0, *ptr;
331 for (i = 0; i < cnt; i++) {
332 rl_eeprom_getword(sc, off + i, &word);
333 ptr = (u_int16_t *)(dest + (i * 2));
343 * MII access routines are provided for the 8129, which
344 * doesn't have a built-in PHY. For the 8139, we fake things
345 * up by diverting rl_phy_readreg()/rl_phy_writereg() to the
346 * direct access PHY registers.
349 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) | x)
352 CSR_WRITE_1(sc, RL_MII, CSR_READ_1(sc, RL_MII) & ~x)
355 * Sync the PHYs by setting data bit and strobing the clock 32 times.
358 rl_mii_sync(struct rl_softc *sc)
362 MII_SET(RL_MII_DIR|RL_MII_DATAOUT);
364 for (i = 0; i < 32; i++) {
373 * Clock a series of bits through the MII.
376 rl_mii_send(struct rl_softc *sc, uint32_t bits, int cnt)
382 for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
384 MII_SET(RL_MII_DATAOUT);
386 MII_CLR(RL_MII_DATAOUT);
395 * Read an PHY register through the MII.
398 rl_mii_readreg(struct rl_softc *sc, struct rl_mii_frame *frame)
403 * Set up frame for RX.
405 frame->mii_stdelim = RL_MII_STARTDELIM;
406 frame->mii_opcode = RL_MII_READOP;
407 frame->mii_turnaround = 0;
410 CSR_WRITE_2(sc, RL_MII, 0);
420 * Send command/address info.
422 rl_mii_send(sc, frame->mii_stdelim, 2);
423 rl_mii_send(sc, frame->mii_opcode, 2);
424 rl_mii_send(sc, frame->mii_phyaddr, 5);
425 rl_mii_send(sc, frame->mii_regaddr, 5);
428 MII_CLR((RL_MII_CLK|RL_MII_DATAOUT));
439 ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN;
444 * Now try reading data bits. If the ack failed, we still
445 * need to clock through 16 cycles to keep the PHY(s) in sync.
448 for(i = 0; i < 16; i++) {
455 for (i = 0x8000; i; i >>= 1) {
459 if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN)
460 frame->mii_data |= i;
477 * Write to a PHY register through the MII.
480 rl_mii_writereg(struct rl_softc *sc, struct rl_mii_frame *frame)
483 * Set up frame for TX.
485 frame->mii_stdelim = RL_MII_STARTDELIM;
486 frame->mii_opcode = RL_MII_WRITEOP;
487 frame->mii_turnaround = RL_MII_TURNAROUND;
490 * Turn on data output.
496 rl_mii_send(sc, frame->mii_stdelim, 2);
497 rl_mii_send(sc, frame->mii_opcode, 2);
498 rl_mii_send(sc, frame->mii_phyaddr, 5);
499 rl_mii_send(sc, frame->mii_regaddr, 5);
500 rl_mii_send(sc, frame->mii_turnaround, 2);
501 rl_mii_send(sc, frame->mii_data, 16);
518 rl_miibus_readreg(device_t dev, int phy, int reg)
521 struct rl_mii_frame frame;
523 uint16_t rl8139_reg = 0;
525 sc = device_get_softc(dev);
527 if (sc->rl_type == RL_8139) {
528 /* Pretend the internal PHY is only at address 0 */
533 rl8139_reg = RL_BMCR;
536 rl8139_reg = RL_BMSR;
539 rl8139_reg = RL_ANAR;
542 rl8139_reg = RL_ANER;
545 rl8139_reg = RL_LPAR;
552 * Allow the rlphy driver to read the media status
553 * register. If we have a link partner which does not
554 * support NWAY, this is the register which will tell
555 * us the results of parallel detection.
558 rval = CSR_READ_1(sc, RL_MEDIASTAT);
561 device_printf(dev, "bad phy register\n");
564 rval = CSR_READ_2(sc, rl8139_reg);
568 bzero(&frame, sizeof(frame));
570 frame.mii_phyaddr = phy;
571 frame.mii_regaddr = reg;
572 rl_mii_readreg(sc, &frame);
574 return(frame.mii_data);
578 rl_miibus_writereg(device_t dev, int phy, int reg, int data)
581 struct rl_mii_frame frame;
582 u_int16_t rl8139_reg = 0;
584 sc = device_get_softc(dev);
586 if (sc->rl_type == RL_8139) {
587 /* Pretend the internal PHY is only at address 0 */
592 rl8139_reg = RL_BMCR;
595 rl8139_reg = RL_BMSR;
598 rl8139_reg = RL_ANAR;
601 rl8139_reg = RL_ANER;
604 rl8139_reg = RL_LPAR;
610 device_printf(dev, "bad phy register\n");
613 CSR_WRITE_2(sc, rl8139_reg, data);
617 bzero(&frame, sizeof(frame));
619 frame.mii_phyaddr = phy;
620 frame.mii_regaddr = reg;
621 frame.mii_data = data;
623 rl_mii_writereg(sc, &frame);
629 rl_miibus_statchg(device_t dev)
634 * Program the 64-bit multicast hash filter.
637 rl_setmulti(struct rl_softc *sc)
641 uint32_t hashes[2] = { 0, 0 };
642 struct ifmultiaddr *ifma;
646 ifp = &sc->arpcom.ac_if;
648 rxfilt = CSR_READ_4(sc, RL_RXCFG);
650 if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
651 rxfilt |= RL_RXCFG_RX_MULTI;
652 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
653 CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF);
654 CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF);
658 /* first, zot all the existing hash bits */
659 CSR_WRITE_4(sc, RL_MAR0, 0);
660 CSR_WRITE_4(sc, RL_MAR4, 0);
662 /* now program new ones */
663 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
664 if (ifma->ifma_addr->sa_family != AF_LINK)
667 LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
668 ETHER_ADDR_LEN) >> 26;
670 hashes[0] |= (1 << h);
672 hashes[1] |= (1 << (h - 32));
677 rxfilt |= RL_RXCFG_RX_MULTI;
679 rxfilt &= ~RL_RXCFG_RX_MULTI;
681 CSR_WRITE_4(sc, RL_RXCFG, rxfilt);
682 CSR_WRITE_4(sc, RL_MAR0, hashes[0]);
683 CSR_WRITE_4(sc, RL_MAR4, hashes[1]);
687 rl_reset(struct rl_softc *sc)
691 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET);
693 for (i = 0; i < RL_TIMEOUT; i++) {
695 if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET))
699 device_printf(sc->rl_dev, "reset never completed!\n");
703 * Probe for a RealTek 8129/8139 chip. Check the PCI vendor and device
704 * IDs against our list and return a device name if we find a match.
706 * Return with a value < 0 to give re(4) a change to attach.
709 rl_probe(device_t dev)
712 uint16_t product = pci_get_device(dev);
713 uint16_t vendor = pci_get_vendor(dev);
715 for (t = rl_devs; t->rl_name != NULL; t++) {
716 if (vendor == t->rl_vid && product == t->rl_did) {
717 device_set_desc(dev, t->rl_name);
726 * Attach the interface. Allocate softc structures, do ifmedia
727 * setup and ethernet/BPF attach.
730 rl_attach(device_t dev)
732 uint8_t eaddr[ETHER_ADDR_LEN];
737 int error = 0, rid, i;
739 sc = device_get_softc(dev);
743 * Handle power management nonsense.
746 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
747 uint32_t iobase, membase, irq;
749 /* Save important PCI config data. */
750 iobase = pci_read_config(dev, RL_PCI_LOIO, 4);
751 membase = pci_read_config(dev, RL_PCI_LOMEM, 4);
752 irq = pci_read_config(dev, RL_PCI_INTLINE, 4);
754 /* Reset the power state. */
755 device_printf(dev, "chip is in D%d power mode "
756 "-- setting to D0\n", pci_get_powerstate(dev));
757 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
759 /* Restore PCI config data. */
760 pci_write_config(dev, RL_PCI_LOIO, iobase, 4);
761 pci_write_config(dev, RL_PCI_LOMEM, membase, 4);
762 pci_write_config(dev, RL_PCI_INTLINE, irq, 4);
765 pci_enable_busmaster(dev);
768 sc->rl_res = bus_alloc_resource_any(dev, RL_RES, &rid, RF_ACTIVE);
770 if (sc->rl_res == NULL) {
771 device_printf(dev, "couldn't map ports/memory\n");
776 sc->rl_btag = rman_get_bustag(sc->rl_res);
777 sc->rl_bhandle = rman_get_bushandle(sc->rl_res);
780 sc->rl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
781 RF_SHAREABLE | RF_ACTIVE);
783 if (sc->rl_irq == NULL) {
784 device_printf(dev, "couldn't map interrupt\n");
789 callout_init(&sc->rl_stat_timer);
791 /* Reset the adapter. */
794 sc->rl_eecmd_read = RL_EECMD_READ_6BIT;
795 rl_read_eeprom(sc, (uint8_t *)&rl_did, 0, 1, 0);
796 if (rl_did != 0x8129)
797 sc->rl_eecmd_read = RL_EECMD_READ_8BIT;
800 * Get station address from the EEPROM.
802 rl_read_eeprom(sc, (caddr_t)as, RL_EE_EADDR, 3, 0);
803 for (i = 0; i < 3; i++) {
804 eaddr[(i * 2) + 0] = as[i] & 0xff;
805 eaddr[(i * 2) + 1] = as[i] >> 8;
809 * Now read the exact device type from the EEPROM to find
810 * out if it's an 8129 or 8139.
812 rl_read_eeprom(sc, (caddr_t)&rl_did, RL_EE_PCI_DID, 1, 0);
814 if (rl_did == PCI_PRODUCT_REALTEK_RT8139 ||
815 rl_did == PCI_PRODUCT_ACCTON_MPX5030 ||
816 rl_did == PCI_PRODUCT_DELTA_8139 ||
817 rl_did == PCI_PRODUCT_ADDTRON_8139 ||
818 rl_did == PCI_PRODUCT_DLINK_DFE530TXPLUS ||
819 rl_did == PCI_PRODUCT_REALTEK_RT8139B ||
820 rl_did == PCI_PRODUCT_DLINK_DFE690TXD ||
821 rl_did == PCI_PRODUCT_COREGA_CB_TXD ||
822 rl_did == PCI_PRODUCT_COREGA_2CB_TXD ||
823 rl_did == PCI_PRODUCT_PLANEX_FNW_3800_TX) {
824 sc->rl_type = RL_8139;
825 } else if (rl_did == PCI_PRODUCT_REALTEK_RT8129) {
826 sc->rl_type = RL_8129;
828 device_printf(dev, "unknown device ID: %x\n", rl_did);
829 sc->rl_type = RL_8139;
831 * Read RL_IDR register to get ethernet address as accessing
832 * EEPROM may not extract correct address.
834 for (i = 0; i < ETHER_ADDR_LEN; i++)
835 eaddr[i] = CSR_READ_1(sc, RL_IDR0 + i);
838 error = rl_dma_alloc(sc);
843 if (mii_phy_probe(dev, &sc->rl_miibus, rl_ifmedia_upd,
845 device_printf(dev, "MII without any phy!\n");
850 ifp = &sc->arpcom.ac_if;
852 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
853 ifp->if_mtu = ETHERMTU;
854 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
855 ifp->if_ioctl = rl_ioctl;
856 ifp->if_start = rl_start;
857 ifp->if_watchdog = rl_watchdog;
858 ifp->if_init = rl_init;
859 ifp->if_baudrate = 10000000;
860 ifp->if_capabilities = IFCAP_VLAN_MTU;
861 #ifdef DEVICE_POLLING
862 ifp->if_poll = rl_poll;
864 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
865 ifq_set_ready(&ifp->if_snd);
868 * Call MI attach routine.
870 ether_ifattach(ifp, eaddr, NULL);
872 error = bus_setup_intr(dev, sc->rl_irq, INTR_MPSAFE, rl_intr,
873 sc, &sc->rl_intrhand, ifp->if_serializer);
876 device_printf(dev, "couldn't set up irq\n");
881 ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->rl_irq));
882 KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus);
892 rl_detach(device_t dev)
897 sc = device_get_softc(dev);
898 ifp = &sc->arpcom.ac_if;
900 if (device_is_attached(dev)) {
901 lwkt_serialize_enter(ifp->if_serializer);
903 bus_teardown_intr(dev, sc->rl_irq, sc->rl_intrhand);
904 lwkt_serialize_exit(ifp->if_serializer);
910 device_delete_child(dev, sc->rl_miibus);
911 bus_generic_detach(dev);
914 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->rl_irq);
916 bus_release_resource(dev, RL_RES, RL_RID, sc->rl_res);
924 * Initialize the transmit descriptors.
927 rl_list_tx_init(struct rl_softc *sc)
929 struct rl_chain_data *cd;
933 for (i = 0; i < RL_TX_LIST_CNT; i++) {
934 cd->rl_tx_chain[i] = NULL;
935 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
939 sc->rl_cdata.cur_tx = 0;
940 sc->rl_cdata.last_tx = 0;
944 * A frame has been uploaded: pass the resulting mbuf chain up to
945 * the higher level protocols.
947 * You know there's something wrong with a PCI bus-master chip design
948 * when you have to use m_devget().
950 * The receive operation is badly documented in the datasheet, so I'll
951 * attempt to document it here. The driver provides a buffer area and
952 * places its base address in the RX buffer start address register.
953 * The chip then begins copying frames into the RX buffer. Each frame
954 * is preceded by a 32-bit RX status word which specifies the length
955 * of the frame and certain other status bits. Each frame (starting with
956 * the status word) is also 32-bit aligned. The frame length is in the
957 * first 16 bits of the status word; the lower 15 bits correspond with
958 * the 'rx status register' mentioned in the datasheet.
960 * Note: to make the Alpha happy, the frame payload needs to be aligned
961 * on a 32-bit boundary. To achieve this, we cheat a bit by copying from
962 * the ring buffer starting at an address two bytes before the actual
963 * data location. We can then shave off the first two bytes using m_adj().
964 * The reason we do this is because m_devget() doesn't let us specify an
965 * offset into the mbuf storage space, so we have to artificially create
966 * one. The ring is allocated in such a way that there are a few unused
967 * bytes of space preceecing it so that it will be safe for us to do the
968 * 2-byte backstep even if reading from the ring at offset 0.
971 rl_rxeof(struct rl_softc *sc)
979 uint16_t cur_rx, limit, max_bytes, rx_bytes = 0;
981 ifp = &sc->arpcom.ac_if;
983 cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN;
985 /* Do not try to read past this point. */
986 limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN;
989 max_bytes = (RL_RXBUFLEN - cur_rx) + limit;
991 max_bytes = limit - cur_rx;
993 while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) {
994 #ifdef DEVICE_POLLING
995 if (ifp->if_flags & IFF_POLLING) {
996 if (sc->rxcycles <= 0)
1000 #endif /* DEVICE_POLLING */
1001 rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx;
1002 rxstat = le32toh(*(uint32_t *)rxbufpos);
1005 * Here's a totally undocumented fact for you. When the
1006 * RealTek chip is in the process of copying a packet into
1007 * RAM for you, the length will be 0xfff0. If you spot a
1008 * packet header with this value, you need to stop. The
1009 * datasheet makes absolutely no mention of this and
1010 * RealTek should be shot for this.
1012 if ((uint16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED)
1015 if ((rxstat & RL_RXSTAT_RXOK) == 0) {
1021 /* No errors; receive the packet. */
1022 total_len = rxstat >> 16;
1023 rx_bytes += total_len + 4;
1026 * XXX The RealTek chip includes the CRC with every
1027 * received frame, and there's no way to turn this
1028 * behavior off (at least, I can't find anything in
1029 * the manual that explains how to do it) so we have
1030 * to trim off the CRC manually.
1032 total_len -= ETHER_CRC_LEN;
1035 * Avoid trying to read more bytes than we know
1036 * the chip has prepared for us.
1038 if (rx_bytes > max_bytes)
1041 rxbufpos = sc->rl_cdata.rl_rx_buf +
1042 ((cur_rx + sizeof(uint32_t)) % RL_RXBUFLEN);
1044 if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN))
1045 rxbufpos = sc->rl_cdata.rl_rx_buf;
1047 wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos;
1049 if (total_len > wrap) {
1051 * Fool m_devget() into thinking we want to copy
1052 * the whole buffer so we don't end up fragmenting
1055 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1056 wrap + RL_ETHER_ALIGN, 0, ifp, NULL);
1060 m_adj(m, RL_ETHER_ALIGN);
1061 m_copyback(m, wrap, total_len - wrap,
1062 sc->rl_cdata.rl_rx_buf);
1064 cur_rx = (total_len - wrap + ETHER_CRC_LEN);
1066 m = m_devget(rxbufpos - RL_ETHER_ALIGN,
1067 total_len + RL_ETHER_ALIGN, 0, ifp, NULL);
1071 m_adj(m, RL_ETHER_ALIGN);
1072 cur_rx += total_len + 4 + ETHER_CRC_LEN;
1076 * Round up to 32-bit boundary.
1078 cur_rx = (cur_rx + 3) & ~3;
1079 CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16);
1086 ifp->if_input(ifp, m);
1091 * A frame was downloaded to the chip. It's safe for us to clean up
1095 rl_txeof(struct rl_softc *sc)
1100 ifp = &sc->arpcom.ac_if;
1103 * Go through our tx list and free mbufs for those
1104 * frames that have been uploaded.
1107 if (RL_LAST_TXMBUF(sc) == NULL)
1109 txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc));
1110 if ((txstat & (RL_TXSTAT_TX_OK | RL_TXSTAT_TX_UNDERRUN |
1111 RL_TXSTAT_TXABRT)) == 0)
1114 ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24;
1116 bus_dmamap_unload(sc->rl_cdata.rl_tx_tag, RL_LAST_DMAMAP(sc));
1117 m_freem(RL_LAST_TXMBUF(sc));
1118 RL_LAST_TXMBUF(sc) = NULL;
1119 RL_INC(sc->rl_cdata.last_tx);
1121 if (txstat & RL_TXSTAT_TX_UNDERRUN) {
1122 sc->rl_txthresh += 32;
1123 if (sc->rl_txthresh > RL_TX_THRESH_MAX)
1124 sc->rl_txthresh = RL_TX_THRESH_MAX;
1127 if (txstat & RL_TXSTAT_TX_OK) {
1131 if (txstat & (RL_TXSTAT_TXABRT | RL_TXSTAT_OUTOFWIN))
1132 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1134 ifp->if_flags &= ~IFF_OACTIVE;
1135 } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx);
1137 if (RL_LAST_TXMBUF(sc) == NULL)
1139 else if (ifp->if_timer == 0)
1146 struct rl_softc *sc = xsc;
1147 struct mii_data *mii;
1149 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1151 mii = device_get_softc(sc->rl_miibus);
1154 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1156 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1159 #ifdef DEVICE_POLLING
1162 rl_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
1164 struct rl_softc *sc = ifp->if_softc;
1168 /* disable interrupts */
1169 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1171 case POLL_DEREGISTER:
1172 /* enable interrupts */
1173 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1176 sc->rxcycles = count;
1179 if (!ifq_is_empty(&ifp->if_snd))
1182 if (cmd == POLL_AND_CHECK_STATUS) { /* also check status register */
1185 status = CSR_READ_2(sc, RL_ISR);
1186 if (status == 0xffff)
1189 CSR_WRITE_2(sc, RL_ISR, status);
1192 * XXX check behaviour on receiver stalls.
1195 if (status & RL_ISR_SYSTEM_ERR) {
1203 #endif /* DEVICE_POLLING */
1208 struct rl_softc *sc;
1217 ifp = &sc->arpcom.ac_if;
1220 status = CSR_READ_2(sc, RL_ISR);
1221 /* If the card has gone away, the read returns 0xffff. */
1222 if (status == 0xffff)
1226 CSR_WRITE_2(sc, RL_ISR, status);
1228 if ((status & RL_INTRS) == 0)
1231 if (status & RL_ISR_RX_OK)
1234 if (status & RL_ISR_RX_ERR)
1237 if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR))
1240 if (status & RL_ISR_SYSTEM_ERR) {
1247 if (!ifq_is_empty(&ifp->if_snd))
1252 * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
1253 * pointers to the fragment pointers.
1256 rl_encap(struct rl_softc *sc, struct mbuf *m_head)
1258 struct mbuf *m_new = NULL;
1259 bus_dma_segment_t seg;
1263 * The RealTek is brain damaged and wants longword-aligned
1264 * TX buffers, plus we can only have one fragment buffer
1265 * per packet. We have to copy pretty much all the time.
1267 m_new = m_defrag(m_head, MB_DONTWAIT);
1268 if (m_new == NULL) {
1274 /* Pad frames to at least 60 bytes. */
1275 if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) {
1276 error = m_devpad(m_head, RL_MIN_FRAMELEN);
1283 /* Extract physical address. */
1284 error = bus_dmamap_load_mbuf_segment(sc->rl_cdata.rl_tx_tag,
1285 RL_CUR_DMAMAP(sc), m_head,
1286 &seg, 1, &nseg, BUS_DMA_NOWAIT);
1292 /* Sync the loaded TX buffer. */
1293 bus_dmamap_sync(sc->rl_cdata.rl_tx_tag, RL_CUR_DMAMAP(sc),
1294 BUS_DMASYNC_PREWRITE);
1297 CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), seg.ds_addr);
1298 CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc),
1299 RL_TXTHRESH(sc->rl_txthresh) | seg.ds_len);
1301 RL_CUR_TXMBUF(sc) = m_head;
1306 * Main transmit routine.
1310 rl_start(struct ifnet *ifp)
1312 struct rl_softc *sc = ifp->if_softc;
1313 struct mbuf *m_head = NULL;
1315 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) != IFF_RUNNING)
1318 while (RL_CUR_TXMBUF(sc) == NULL) {
1319 m_head = ifq_dequeue(&ifp->if_snd, NULL);
1323 if (rl_encap(sc, m_head))
1327 * If there's a BPF listener, bounce a copy of this frame
1330 BPF_MTAP(ifp, RL_CUR_TXMBUF(sc));
1332 RL_INC(sc->rl_cdata.cur_tx);
1335 * Set a timeout in case the chip goes out to lunch.
1341 * We broke out of the loop because all our TX slots are
1342 * full. Mark the NIC as busy until it drains some of the
1343 * packets from the queue.
1345 if (RL_CUR_TXMBUF(sc) != NULL)
1346 ifp->if_flags |= IFF_OACTIVE;
1352 struct rl_softc *sc = xsc;
1353 struct ifnet *ifp = &sc->arpcom.ac_if;
1354 struct mii_data *mii;
1357 mii = device_get_softc(sc->rl_miibus);
1360 * Cancel pending I/O and free all RX/TX buffers.
1365 * Init our MAC address. Even though the chipset documentation
1366 * doesn't mention it, we need to enter "Config register write enable"
1367 * mode to modify the ID registers.
1369 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_WRITECFG);
1370 CSR_WRITE_STREAM_4(sc, RL_IDR0,
1371 *(uint32_t *)(&sc->arpcom.ac_enaddr[0]));
1372 CSR_WRITE_STREAM_4(sc, RL_IDR4,
1373 *(uint32_t *)(&sc->arpcom.ac_enaddr[4]));
1374 CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF);
1376 /* Init the RX buffer pointer register. */
1377 CSR_WRITE_4(sc, RL_RXADDR, sc->rl_cdata.rl_rx_buf_paddr);
1379 /* Init TX descriptors. */
1380 rl_list_tx_init(sc);
1383 * Enable transmit and receive.
1385 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1388 * Set the initial TX and RX configuration.
1390 CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG);
1391 CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG);
1393 /* Set the individual bit to receive frames for this host only. */
1394 rxcfg = CSR_READ_4(sc, RL_RXCFG);
1395 rxcfg |= RL_RXCFG_RX_INDIV;
1397 /* If we want promiscuous mode, set the allframes bit. */
1398 if (ifp->if_flags & IFF_PROMISC) {
1399 rxcfg |= RL_RXCFG_RX_ALLPHYS;
1400 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1402 rxcfg &= ~RL_RXCFG_RX_ALLPHYS;
1403 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1407 * Set capture broadcast bit to capture broadcast frames.
1409 if (ifp->if_flags & IFF_BROADCAST) {
1410 rxcfg |= RL_RXCFG_RX_BROAD;
1411 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1413 rxcfg &= ~RL_RXCFG_RX_BROAD;
1414 CSR_WRITE_4(sc, RL_RXCFG, rxcfg);
1418 * Program the multicast filter, if necessary.
1422 #ifdef DEVICE_POLLING
1424 * Only enable interrupts if we are polling, keep them off otherwise.
1426 if (ifp->if_flags & IFF_POLLING)
1427 CSR_WRITE_2(sc, RL_IMR, 0);
1429 #endif /* DEVICE_POLLING */
1431 * Enable interrupts.
1433 CSR_WRITE_2(sc, RL_IMR, RL_INTRS);
1435 /* Set initial TX threshold */
1436 sc->rl_txthresh = RL_TX_THRESH_INIT;
1438 /* Start RX/TX process. */
1439 CSR_WRITE_4(sc, RL_MISSEDPKT, 0);
1441 /* Enable receiver and transmitter. */
1442 CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB);
1446 CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX);
1448 ifp->if_flags |= IFF_RUNNING;
1449 ifp->if_flags &= ~IFF_OACTIVE;
1451 callout_reset(&sc->rl_stat_timer, hz, rl_tick, sc);
1455 * Set media options.
1458 rl_ifmedia_upd(struct ifnet *ifp)
1460 struct rl_softc *sc;
1461 struct mii_data *mii;
1464 mii = device_get_softc(sc->rl_miibus);
1471 * Report current media status.
1474 rl_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
1476 struct rl_softc *sc = ifp->if_softc;
1477 struct mii_data *mii = device_get_softc(sc->rl_miibus);
1480 ifmr->ifm_active = mii->mii_media_active;
1481 ifmr->ifm_status = mii->mii_media_status;
1485 rl_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
1487 struct rl_softc *sc = ifp->if_softc;
1488 struct ifreq *ifr = (struct ifreq *) data;
1489 struct mii_data *mii;
1494 if (ifp->if_flags & IFF_UP) {
1497 if (ifp->if_flags & IFF_RUNNING)
1509 mii = device_get_softc(sc->rl_miibus);
1510 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
1515 error = ether_ioctl(ifp, command, data);
1523 rl_watchdog(struct ifnet *ifp)
1525 struct rl_softc *sc = ifp->if_softc;
1527 device_printf(sc->rl_dev, "watchdog timeout\n");
1537 * Stop the adapter and free any mbufs allocated to the
1541 rl_stop(struct rl_softc *sc)
1543 struct ifnet *ifp = &sc->arpcom.ac_if;
1548 callout_stop(&sc->rl_stat_timer);
1549 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1551 CSR_WRITE_1(sc, RL_COMMAND, 0x00);
1552 CSR_WRITE_2(sc, RL_IMR, 0x0000);
1555 * Free the TX list buffers.
1557 for (i = 0; i < RL_TX_LIST_CNT; i++) {
1558 if (sc->rl_cdata.rl_tx_chain[i] != NULL) {
1559 bus_dmamap_unload(sc->rl_cdata.rl_tx_tag,
1560 sc->rl_cdata.rl_tx_dmamap[i]);
1561 m_freem(sc->rl_cdata.rl_tx_chain[i]);
1562 sc->rl_cdata.rl_tx_chain[i] = NULL;
1563 CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(uint32_t)),
1570 * Stop all chip I/O so that the kernel's probe routines don't
1571 * get confused by errant DMAs when rebooting.
1574 rl_shutdown(device_t dev)
1576 struct rl_softc *sc;
1578 sc = device_get_softc(dev);
1579 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1581 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1585 * Device suspend routine. Stop the interface and save some PCI
1586 * settings in case the BIOS doesn't restore them properly on
1590 rl_suspend(device_t dev)
1592 struct rl_softc *sc = device_get_softc(dev);
1595 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
1598 for (i = 0; i < 5; i++)
1599 sc->saved_maps[i] = pci_read_config(dev, PCIR_BAR(i), 4);
1600 sc->saved_biosaddr = pci_read_config(dev, PCIR_BIOS, 4);
1601 sc->saved_intline = pci_read_config(dev, PCIR_INTLINE, 1);
1602 sc->saved_cachelnsz = pci_read_config(dev, PCIR_CACHELNSZ, 1);
1603 sc->saved_lattimer = pci_read_config(dev, PCIR_LATTIMER, 1);
1607 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
1612 * Device resume routine. Restore some PCI settings in case the BIOS
1613 * doesn't, re-enable busmastering, and restart the interface if
1617 rl_resume(device_t dev)
1619 struct rl_softc *sc = device_get_softc(dev);
1620 struct ifnet *ifp = &sc->arpcom.ac_if;
1623 lwkt_serialize_enter(ifp->if_serializer);
1625 /* better way to do this? */
1626 for (i = 0; i < 5; i++)
1627 pci_write_config(dev, PCIR_BAR(i), sc->saved_maps[i], 4);
1628 pci_write_config(dev, PCIR_BIOS, sc->saved_biosaddr, 4);
1629 pci_write_config(dev, PCIR_INTLINE, sc->saved_intline, 1);
1630 pci_write_config(dev, PCIR_CACHELNSZ, sc->saved_cachelnsz, 1);
1631 pci_write_config(dev, PCIR_LATTIMER, sc->saved_lattimer, 1);
1633 /* reenable busmastering */
1634 pci_enable_busmaster(dev);
1635 pci_enable_io(dev, RL_RES);
1637 /* reinitialize interface if necessary */
1638 if (ifp->if_flags & IFF_UP)
1642 lwkt_serialize_exit(ifp->if_serializer);
1647 rl_dma_alloc(struct rl_softc *sc)
1652 error = bus_dma_tag_create(NULL, /* parent */
1653 1, 0, /* alignment, boundary */
1654 BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
1655 BUS_SPACE_MAXADDR, /* highaddr */
1656 NULL, NULL, /* filter, filterarg */
1657 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
1659 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
1661 &sc->rl_parent_tag);
1663 device_printf(sc->rl_dev, "can't create parent tag\n");
1667 /* Allocate a chunk of coherent memory for RX */
1668 error = bus_dmamem_coherent(sc->rl_parent_tag, 1, 0,
1669 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
1670 RL_RXBUFLEN + 1518, BUS_DMA_WAITOK, &dmem);
1674 sc->rl_cdata.rl_rx_tag = dmem.dmem_tag;
1675 sc->rl_cdata.rl_rx_dmamap = dmem.dmem_map;
1676 sc->rl_cdata.rl_rx_buf_ptr = dmem.dmem_addr;
1678 /* NOTE: Apply same adjustment to vaddr and paddr */
1679 sc->rl_cdata.rl_rx_buf = sc->rl_cdata.rl_rx_buf_ptr + sizeof(uint64_t);
1680 sc->rl_cdata.rl_rx_buf_paddr = dmem.dmem_busaddr + sizeof(uint64_t);
1683 * Allocate TX mbuf's DMA tag and maps
1685 error = bus_dma_tag_create(sc->rl_parent_tag,/* parent */
1686 RL_TXBUF_ALIGN, 0, /* alignment, boundary */
1687 BUS_SPACE_MAXADDR, /* lowaddr */
1688 BUS_SPACE_MAXADDR, /* highaddr */
1689 NULL, NULL, /* filter, filterarg */
1690 MCLBYTES, /* maxsize */
1692 MCLBYTES, /* maxsegsize */
1693 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK |
1694 BUS_DMA_ALIGNED, /* flags */
1695 &sc->rl_cdata.rl_tx_tag);
1697 device_printf(sc->rl_dev, "can't create TX mbuf tag\n");
1701 for (i = 0; i < RL_TX_LIST_CNT; ++i) {
1702 error = bus_dmamap_create(sc->rl_cdata.rl_tx_tag,
1703 BUS_DMA_WAITOK, &sc->rl_cdata.rl_tx_dmamap[i]);
1707 for (j = 0; j < i; ++j) {
1708 bus_dmamap_destroy(sc->rl_cdata.rl_tx_tag,
1709 sc->rl_cdata.rl_tx_dmamap[j]);
1711 bus_dma_tag_destroy(sc->rl_cdata.rl_tx_tag);
1712 sc->rl_cdata.rl_tx_tag = NULL;
1714 device_printf(sc->rl_dev, "can't create TX mbuf map\n");
1722 rl_dma_free(struct rl_softc *sc)
1724 if (sc->rl_cdata.rl_tx_tag != NULL) {
1727 for (i = 0; i < RL_TX_LIST_CNT; ++i) {
1728 bus_dmamap_destroy(sc->rl_cdata.rl_tx_tag,
1729 sc->rl_cdata.rl_tx_dmamap[i]);
1731 bus_dma_tag_destroy(sc->rl_cdata.rl_tx_tag);
1734 if (sc->rl_cdata.rl_rx_tag != NULL) {
1735 bus_dmamap_unload(sc->rl_cdata.rl_rx_tag,
1736 sc->rl_cdata.rl_rx_dmamap);
1737 /* NOTE: Use rl_rx_buf_ptr here */
1738 bus_dmamem_free(sc->rl_cdata.rl_rx_tag,
1739 sc->rl_cdata.rl_rx_buf_ptr,
1740 sc->rl_cdata.rl_rx_dmamap);
1741 bus_dma_tag_destroy(sc->rl_cdata.rl_rx_tag);
1744 if (sc->rl_parent_tag)
1745 bus_dma_tag_destroy(sc->rl_parent_tag);