Make all network interrupt service routines MPSAFE part 1/3.
[dragonfly.git] / sys / dev / netif / lnc / if_lnc_pci.c
1 /*
2  * Copyright (c) 1994-2000
3  *      Paul Richards. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer,
10  *    verbatim and that no modifications are made prior to this
11  *    point in the file.
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. The name Paul Richards may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY PAUL RICHARDS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  * $FreeBSD: src/sys/dev/lnc/if_lnc_pci.c,v 1.25 2001/07/04 13:00:19 nyan Exp $
31  * $DragonFly: src/sys/dev/netif/lnc/if_lnc_pci.c,v 1.8 2005/11/28 17:13:43 dillon Exp $
32  */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/socket.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/serialize.h>
40
41 #include <machine/bus.h>
42 #include <machine/resource.h>
43 #include <sys/bus.h>
44 #include <sys/rman.h>
45
46 #include <sys/thread2.h>
47
48 #include <net/ethernet.h>
49 #include <net/if.h>
50 #include <net/if_arp.h>
51
52 #include <bus/pci/pcireg.h>
53 #include <bus/pci/pcivar.h>
54
55 #include <dev/netif/lnc/if_lncreg.h>
56 #include <dev/netif/lnc/if_lncvar.h>
57
58 #define AMD_VENDOR_ID 0x1022
59 #define PCI_DEVICE_ID_PCNet_PCI 0x2000
60 #define PCI_DEVICE_ID_PCHome_PCI 0x2001
61
62 #define LNC_PROBE_PRIORITY -1
63
64 static int      lnc_pci_detach(device_t);
65
66 static int
67 lnc_pci_probe(device_t dev)
68 {
69         if (pci_get_vendor(dev) != AMD_VENDOR_ID)
70                 return (ENXIO);
71
72         switch(pci_get_device(dev)) {
73         case PCI_DEVICE_ID_PCNet_PCI:
74                 device_set_desc(dev, "PCNet/PCI Ethernet adapter");
75                 return(LNC_PROBE_PRIORITY);
76                 break;
77         case PCI_DEVICE_ID_PCHome_PCI:
78                 device_set_desc(dev, "PCHome/PCI Ethernet adapter");
79                 return(LNC_PROBE_PRIORITY);
80                 break;
81         default:
82                 return (ENXIO);
83                 break;
84         }
85         return (ENXIO);
86 }
87
88 static void
89 lnc_alloc_callback(void *arg, bus_dma_segment_t *seg, int nseg, int error)
90 {
91         /* Do nothing */
92         return;
93 }
94
95 static int
96 lnc_pci_attach(device_t dev)
97 {
98         lnc_softc_t *sc = device_get_softc(dev);
99         unsigned command;
100         int rid = 0;
101         int error = 0;
102         bus_size_t lnc_mem_size;
103
104         command = pci_read_config(dev, PCIR_COMMAND, 4);
105         command |= PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN;
106         pci_write_config(dev, PCIR_COMMAND, command, 4);
107
108         rid = PCIR_MAPS;
109         sc->portres = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
110             RF_ACTIVE);
111
112         if (! sc->portres) {
113                 device_printf(dev, "Cannot allocate I/O ports\n");
114                 error = ENXIO;
115                 goto fail;
116         }
117
118         rid = 0;
119         sc->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
120             RF_ACTIVE | RF_SHAREABLE);
121
122         if (! sc->irqres) {
123                 device_printf(dev, "Cannot allocate irq\n");
124                 error = ENXIO;
125                 goto fail;
126         }
127
128         sc->lnc_btag = rman_get_bustag(sc->portres);
129         sc->lnc_bhandle = rman_get_bushandle(sc->portres);
130
131         /* XXX temp setting for nic */
132         sc->nic.ic = PCnet_PCI;
133         sc->nic.ident = NE2100;
134         sc->nic.mem_mode = DMA_FIXED;
135         sc->nrdre  = NRDRE;
136         sc->ntdre  = NTDRE;
137         sc->rap = PCNET_RAP;
138         sc->rdp = PCNET_RDP;
139         sc->bdp = PCNET_BDP;
140
141         /* Create a DMA tag describing the ring memory we need */
142
143         lnc_mem_size = ((NDESC(sc->nrdre) + NDESC(sc->ntdre)) *
144                          sizeof(struct host_ring_entry));
145
146         lnc_mem_size += sizeof(struct init_block) + (sizeof(struct mds) *
147                         (NDESC(sc->nrdre) + NDESC(sc->ntdre))) + MEM_SLEW;
148
149         lnc_mem_size += (NDESC(sc->nrdre) * RECVBUFSIZE) +
150                         (NDESC(sc->ntdre) * TRANSBUFSIZE);
151
152         error = bus_dma_tag_create(NULL,                /* parent */
153                                    1,                   /* alignement */
154                                    0,                   /* boundary */
155                                    BUS_SPACE_MAXADDR_24BIT,     /* lowaddr */
156                                    BUS_SPACE_MAXADDR,   /* highaddr */
157                                    NULL, NULL,          /* filter, filterarg */
158                                    lnc_mem_size,        /* segsize */
159                                    1,                   /* nsegments */
160                                    BUS_SPACE_MAXSIZE_32BIT,     /* maxsegsize */
161                                    BUS_DMA_ALLOCNOW,    /* flags */
162                                    &sc->dmat);
163
164         if (error) {
165                 device_printf(dev, "Can't create DMA tag\n");
166                 goto fail;
167         }
168
169         error = bus_dmamem_alloc(sc->dmat, (void **)&sc->recv_ring,
170                                BUS_DMA_WAITOK, &sc->dmamap);
171         if (error) {
172                 device_printf(dev, "Couldn't allocate memory\n");
173                 goto fail;
174         }
175
176         error = bus_dmamap_load(sc->dmat, sc->dmamap, sc->recv_ring,
177                                 lnc_mem_size, lnc_alloc_callback,
178                                 sc->recv_ring, 0);
179         if (error) {
180                 device_printf(dev, "Couldn't map receive ring\n");
181                 goto fail;
182         }
183
184         /* Call generic attach code */
185         if (! lnc_attach_common(dev)) {
186                 device_printf(dev, "Generic attach code failed\n");
187                 error = ENXIO;
188                 goto fail;
189         }
190
191         error = bus_setup_intr(dev, sc->irqres, INTR_NETSAFE, lncintr,
192                              sc, &sc->intrhand, 
193                              sc->arpcom.ac_if.if_serializer);
194         if (error) {
195                 device_printf(dev, "Cannot setup irq handler\n");
196                 ether_ifdetach(&sc->arpcom.ac_if);
197                 goto fail;
198         }
199
200         return (0);
201
202 fail:
203         lnc_pci_detach(dev);
204         return(error);
205 }
206
207 static int
208 lnc_pci_detach(device_t dev)
209 {
210         lnc_softc_t *sc = device_get_softc(dev);
211
212         lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
213
214         if (device_is_attached(dev)) {
215                 ether_ifdetach(&sc->arpcom.ac_if);
216                 lnc_stop(sc);
217         }
218
219         if (sc->intrhand)
220                 bus_teardown_intr(dev, sc->irqres, sc->intrhand);
221
222         if (sc->irqres)
223                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irqres);
224         if (sc->portres)
225                 bus_release_resource(dev, SYS_RES_IOPORT, PCIR_MAPS,
226                                      sc->portres);
227
228         if (sc->dmamap) {
229                 bus_dmamap_unload(sc->dmat, sc->dmamap);
230                 bus_dmamem_free(sc->dmat, sc->recv_ring, sc->dmamap);
231         }
232         if (sc->dmat)
233                 bus_dma_tag_destroy(sc->dmat);
234
235         lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
236
237         return (0);
238 }
239
240 static device_method_t lnc_pci_methods[] = {
241         DEVMETHOD(device_probe,         lnc_pci_probe),
242         DEVMETHOD(device_attach,        lnc_pci_attach),
243         DEVMETHOD(device_detach,        lnc_pci_detach),
244 #ifdef notyet
245         DEVMETHOD(device_suspend,       lnc_pci_suspend),
246         DEVMETHOD(device_resume,        lnc_pci_resume),
247         DEVMETHOD(device_shutdown,      lnc_pci_shutdown),
248 #endif
249         { 0, 0 }
250 };
251
252 static driver_t lnc_pci_driver = {
253         "lnc",
254         lnc_pci_methods,
255         sizeof(struct lnc_softc),
256 };
257
258 DRIVER_MODULE(if_lnc, pci, lnc_pci_driver, lnc_devclass, 0, 0);