if_rtk_pci.c revision 1.5.2.3 1 /* $NetBSD: if_rtk_pci.c,v 1.5.2.3 2001/11/14 19:15:17 nathanw Exp $ */
2
3 /*
4 * Copyright (c) 1997, 1998
5 * Bill Paul <wpaul (at) 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 (at) 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 1.5.2.3 2001/11/14 19:15:17 nathanw 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