1 /* $NetBSD: if_rtk_pci.c,v 1.10 2001/11/13 07:48:44 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1997, 1998 5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * FreeBSD Id: if_rl.c,v 1.17 1999/06/19 20:17:37 wpaul Exp 35 */ 36 37 /* 38 * RealTek 8129/8139 PCI NIC driver 39 * 40 * Supports several extremely cheap PCI 10/100 adapters based on 41 * the RealTek chipset. Datasheets can be obtained from 42 * www.realtek.com.tw. 43 * 44 * Written by Bill Paul <wpaul@ctr.columbia.edu> 45 * Electrical Engineering Department 46 * Columbia University, New York City 47 */ 48 49 /* 50 * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is 51 * probably the worst PCI ethernet controller ever made, with the possible 52 * exception of the FEAST chip made by SMC. The 8139 supports bus-master 53 * DMA, but it has a terrible interface that nullifies any performance 54 * gains that bus-master DMA usually offers. 55 * 56 * For transmission, the chip offers a series of four TX descriptor 57 * registers. Each transmit frame must be in a contiguous buffer, aligned 58 * on a longword (32-bit) boundary. This means we almost always have to 59 * do mbuf copies in order to transmit a frame, except in the unlikely 60 * case where a) the packet fits into a single mbuf, and b) the packet 61 * is 32-bit aligned within the mbuf's data area. The presence of only 62 * four descriptor registers means that we can never have more than four 63 * packets queued for transmission at any one time. 64 * 65 * Reception is not much better. The driver has to allocate a single large 66 * buffer area (up to 64K in size) into which the chip will DMA received 67 * frames. Because we don't know where within this region received packets 68 * will begin or end, we have no choice but to copy data from the buffer 69 * area into mbufs in order to pass the packets up to the higher protocol 70 * levels. 71 * 72 * It's impossible given this rotten design to really achieve decent 73 * performance at 100Mbps, unless you happen to have a 400Mhz PII or 74 * some equally overmuscled CPU to drive it. 75 * 76 * On the bright side, the 8139 does have a built-in PHY, although 77 * rather than using an MDIO serial interface like most other NICs, the 78 * PHY registers are directly accessible through the 8139's register 79 * space. The 8139 supports autonegotiation, as well as a 64-bit multicast 80 * filter. 81 * 82 * The 8129 chip is an older version of the 8139 that uses an external PHY 83 * chip. The 8129 has a serial MDIO interface for accessing the MII where 84 * the 8139 lets you directly access the on-board PHY registers. We need 85 * to select which interface to use depending on the chip type. 86 */ 87 88 #include <sys/cdefs.h> 89 __KERNEL_RCSID(0, "$NetBSD: if_rtk_pci.c,v 1.10 2001/11/13 07:48:44 lukem Exp $"); 90 91 #include <sys/param.h> 92 #include <sys/systm.h> 93 #include <sys/callout.h> 94 #include <sys/device.h> 95 #include <sys/sockio.h> 96 #include <sys/mbuf.h> 97 #include <sys/malloc.h> 98 #include <sys/kernel.h> 99 #include <sys/socket.h> 100 101 #include <net/if.h> 102 #include <net/if_arp.h> 103 #include <net/if_ether.h> 104 #include <net/if_dl.h> 105 #include <net/if_media.h> 106 107 #include <machine/bus.h> 108 109 #include <dev/pci/pcireg.h> 110 #include <dev/pci/pcivar.h> 111 #include <dev/pci/pcidevs.h> 112 113 #include <dev/mii/mii.h> 114 #include <dev/mii/miivar.h> 115 116 /* 117 * Default to using PIO access for this driver. On SMP systems, 118 * there appear to be problems with memory mapped mode: it looks like 119 * doing too many memory mapped access back to back in rapid succession 120 * can hang the bus. I'm inclined to blame this on crummy design/construction 121 * on the part of RealTek. Memory mapped mode does appear to work on 122 * uniprocessor systems though. 123 */ 124 #ifndef dreamcast /* XXX */ 125 #define RTK_USEIOSPACE 126 #endif 127 128 #include <dev/ic/rtl81x9reg.h> 129 #include <dev/ic/rtl81x9var.h> 130 131 struct rtk_pci_softc { 132 struct rtk_softc sc_rtk; /* real rtk softc */ 133 134 /* PCI-specific goo.*/ 135 void *sc_ih; 136 pci_chipset_tag_t sc_pc; /* PCI chipset */ 137 pcitag_t sc_pcitag; /* PCI tag */ 138 }; 139 140 static const struct rtk_type rtk_pci_devs[] = { 141 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8129, 142 "RealTek 8129 10/100BaseTX", 143 RTK_8129 }, 144 { PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8139, 145 "RealTek 8139 10/100BaseTX", 146 RTK_8139 }, 147 { PCI_VENDOR_ACCTON, PCI_PRODUCT_ACCTON_MPX5030, 148 "Accton MPX 5030/5038 10/100BaseTX", 149 RTK_8139 }, 150 { PCI_VENDOR_DELTA, PCI_PRODUCT_DELTA_8139, 151 "Delta Electronics 8139 10/100BaseTX", 152 RTK_8139 }, 153 { PCI_VENDOR_ADDTRON, PCI_PRODUCT_ADDTRON_8139, 154 "Addtron Technology 8139 10/100BaseTX", 155 RTK_8139 }, 156 { PCI_VENDOR_SEGA, PCI_PRODUCT_SEGA_BROADBAND, 157 "SEGA Broadband Adapter", 158 RTK_8139 }, 159 { PCI_VENDOR_DLINK, PCI_PRODUCT_DLINK_DFE530TXPLUS, 160 "D-Link Systems DFE 530TX+", 161 RTK_8139 }, 162 { 0, 0, NULL, 0 } 163 }; 164 165 const struct rtk_type *rtk_pci_lookup __P((const struct pci_attach_args *)); 166 167 int rtk_pci_match __P((struct device *, struct cfdata *, void *)); 168 void rtk_pci_attach __P((struct device *, struct device *, void *)); 169 170 struct cfattach rtk_pci_ca = { 171 sizeof(struct rtk_pci_softc), rtk_pci_match, rtk_pci_attach, 172 }; 173 174 const struct rtk_type * 175 rtk_pci_lookup(pa) 176 const struct pci_attach_args *pa; 177 { 178 const struct rtk_type *t; 179 180 for (t = rtk_pci_devs; t->rtk_name != NULL; t++){ 181 if (PCI_VENDOR(pa->pa_id) == t->rtk_vid && 182 PCI_PRODUCT(pa->pa_id) == t->rtk_did) { 183 return (t); 184 } 185 } 186 return (NULL); 187 } 188 189 int 190 rtk_pci_match(parent, match, aux) 191 struct device *parent; 192 struct cfdata *match; 193 void *aux; 194 { 195 struct pci_attach_args *pa = aux; 196 197 if (rtk_pci_lookup(pa) != NULL) 198 return (1); 199 200 return (0); 201 } 202 203 /* 204 * Attach the interface. Allocate softc structures, do ifmedia 205 * setup and ethernet/BPF attach. 206 */ 207 void 208 rtk_pci_attach(parent, self, aux) 209 struct device *parent, *self; 210 void *aux; 211 { 212 struct rtk_pci_softc *psc = (struct rtk_pci_softc *)self; 213 struct rtk_softc *sc = &psc->sc_rtk; 214 pcireg_t command; 215 struct pci_attach_args *pa = aux; 216 pci_chipset_tag_t pc = pa->pa_pc; 217 pci_intr_handle_t ih; 218 const char *intrstr = NULL; 219 const struct rtk_type *t; 220 int pmreg; 221 222 psc->sc_pc = pa->pa_pc; 223 psc->sc_pcitag = pa->pa_tag; 224 225 t = rtk_pci_lookup(pa); 226 if (t == NULL) { 227 printf("\n"); 228 panic("rtk_pci_attach: impossible"); 229 } 230 printf(": %s\n", t->rtk_name); 231 232 /* 233 * Handle power management nonsense. 234 */ 235 236 if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT, &pmreg, 0)) { 237 command = pci_conf_read(pc, pa->pa_tag, pmreg + 4); 238 if (command & RTK_PSTATE_MASK) { 239 pcireg_t iobase, membase, irq; 240 241 /* Save important PCI config data. */ 242 iobase = pci_conf_read(pc, pa->pa_tag, RTK_PCI_LOIO); 243 membase = pci_conf_read(pc, pa->pa_tag, RTK_PCI_LOMEM); 244 irq = pci_conf_read(pc, pa->pa_tag, 245 PCI_PRODUCT_DELTA_8139); 246 247 /* Reset the power state. */ 248 printf("%s: chip is is in D%d power mode " 249 "-- setting to D0\n", sc->sc_dev.dv_xname, 250 command & RTK_PSTATE_MASK); 251 command &= 0xFFFFFFFC; 252 pci_conf_write(pc, pa->pa_tag, pmreg + 4, command); 253 254 /* Restore PCI config data. */ 255 pci_conf_write(pc, pa->pa_tag, RTK_PCI_LOIO, iobase); 256 pci_conf_write(pc, pa->pa_tag, RTK_PCI_LOMEM, membase); 257 pci_conf_write(pc, pa->pa_tag, 258 PCI_PRODUCT_DELTA_8139, irq); 259 } 260 } 261 262 /* 263 * Map control/status registers. 264 */ 265 #ifdef RTK_USEIOSPACE 266 if (pci_mapreg_map(pa, RTK_PCI_LOIO, PCI_MAPREG_TYPE_IO, 0, 267 &sc->rtk_btag, &sc->rtk_bhandle, NULL, NULL)) { 268 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 269 return; 270 } 271 #else 272 if (pci_mapreg_map(pa, RTK_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0, 273 &sc->rtk_btag, &sc->rtk_bhandle, NULL, NULL)) { 274 printf("%s: can't map mem space\n", sc->sc_dev.dv_xname); 275 return; 276 } 277 #endif 278 279 /* Allocate interrupt */ 280 if (pci_intr_map(pa, &ih)) { 281 printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname); 282 return; 283 } 284 intrstr = pci_intr_string(pc, ih); 285 psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, rtk_intr, sc); 286 if (psc->sc_ih == NULL) { 287 printf("%s: couldn't establish interrupt", 288 sc->sc_dev.dv_xname); 289 if (intrstr != NULL) 290 printf(" at %s", intrstr); 291 printf("\n"); 292 return; 293 } 294 295 sc->rtk_type = t->rtk_type; 296 297 printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr); 298 299 sc->sc_dmat = pa->pa_dmat; 300 301 rtk_attach(sc); 302 } 303