FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_pci.c
1 /*-
2 * Copyright (c) 2006 IronPort Systems
3 * 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 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/6.2/sys/dev/mfi/mfi_pci.c 160471 2006-07-18 19:56:55Z jhb $");
29
30 /* PCI/PCI-X/PCIe bus interface for the LSI MegaSAS controllers */
31
32 #include "opt_mfi.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/selinfo.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/conf.h>
41 #include <sys/bio.h>
42 #include <sys/malloc.h>
43 #include <sys/uio.h>
44
45 #include <machine/bus.h>
46 #include <machine/resource.h>
47 #include <sys/rman.h>
48
49 #include <dev/pci/pcireg.h>
50 #include <dev/pci/pcivar.h>
51
52 #include <dev/mfi/mfireg.h>
53 #include <dev/mfi/mfi_ioctl.h>
54 #include <dev/mfi/mfivar.h>
55
56 static int mfi_pci_probe(device_t);
57 static int mfi_pci_attach(device_t);
58 static int mfi_pci_detach(device_t);
59 static int mfi_pci_suspend(device_t);
60 static int mfi_pci_resume(device_t);
61 static void mfi_pci_free(struct mfi_softc *);
62
63 static device_method_t mfi_methods[] = {
64 DEVMETHOD(device_probe, mfi_pci_probe),
65 DEVMETHOD(device_attach, mfi_pci_attach),
66 DEVMETHOD(device_detach, mfi_pci_detach),
67 DEVMETHOD(device_suspend, mfi_pci_suspend),
68 DEVMETHOD(device_resume, mfi_pci_resume),
69 DEVMETHOD(bus_print_child, bus_generic_print_child),
70 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
71 { 0, 0 }
72 };
73
74 static driver_t mfi_pci_driver = {
75 "mfi",
76 mfi_methods,
77 sizeof(struct mfi_softc)
78 };
79
80 static devclass_t mfi_devclass;
81 DRIVER_MODULE(mfi, pci, mfi_pci_driver, mfi_devclass, 0, 0);
82
83 struct mfi_ident {
84 uint16_t vendor;
85 uint16_t device;
86 uint16_t subvendor;
87 uint16_t subdevice;
88 int flags;
89 const char *desc;
90 } mfi_identifiers[] = {
91 {0x1000, 0x0411, 0xffff, 0xffff, 0, "LSI MegaSAS 1064R"},
92 {0x1028, 0x0015, 0xffff, 0xffff, 0, "Dell PERC 5/i"},
93 {0, 0, 0, 0, 0, NULL}
94 };
95
96 static struct mfi_ident *
97 mfi_find_ident(device_t dev)
98 {
99 struct mfi_ident *m;
100
101 for (m = mfi_identifiers; m->vendor != 0; m++) {
102 if ((m->vendor == pci_get_vendor(dev)) &&
103 (m->device == pci_get_device(dev)) &&
104 ((m->subvendor == pci_get_subvendor(dev)) ||
105 (m->subvendor == 0xffff)) &&
106 ((m->subdevice == pci_get_subdevice(dev)) ||
107 (m->subdevice == 0xffff)))
108 return (m);
109 }
110
111 return (NULL);
112 }
113
114 static int
115 mfi_pci_probe(device_t dev)
116 {
117 struct mfi_ident *id;
118
119 if ((id = mfi_find_ident(dev)) != NULL) {
120 device_set_desc(dev, id->desc);
121 return (BUS_PROBE_DEFAULT);
122 }
123 return (ENXIO);
124 }
125
126 static int
127 mfi_pci_attach(device_t dev)
128 {
129 struct mfi_softc *sc;
130 struct mfi_ident *m;
131 uint32_t command;
132 int error;
133
134 sc = device_get_softc(dev);
135 bzero(sc, sizeof(*sc));
136 sc->mfi_dev = dev;
137
138 /* Verify that the adapter can be set up in PCI space */
139 command = pci_read_config(dev, PCIR_COMMAND, 2);
140 command |= PCIM_CMD_BUSMASTEREN;
141 pci_write_config(dev, PCIR_COMMAND, command, 2);
142 command = pci_read_config(dev, PCIR_COMMAND, 2);
143 if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
144 device_printf(dev, "Can't enable PCI busmaster\n");
145 return (ENXIO);
146 }
147 if ((command & PCIM_CMD_MEMEN) == 0) {
148 device_printf(dev, "PCI memory window not available\n");
149 return (ENXIO);
150 }
151
152 /* Allocate PCI registers */
153 sc->mfi_regs_rid = PCIR_BAR(0);
154 if ((sc->mfi_regs_resource = bus_alloc_resource_any(sc->mfi_dev,
155 SYS_RES_MEMORY, &sc->mfi_regs_rid, RF_ACTIVE)) == NULL) {
156 device_printf(dev, "Cannot allocate PCI registers\n");
157 return (ENXIO);
158 }
159 sc->mfi_btag = rman_get_bustag(sc->mfi_regs_resource);
160 sc->mfi_bhandle = rman_get_bushandle(sc->mfi_regs_resource);
161
162 error = ENOMEM;
163
164 /* Allocate parent DMA tag */
165 if (bus_dma_tag_create( NULL, /* parent */
166 1, 0, /* algnmnt, boundary */
167 BUS_SPACE_MAXADDR, /* lowaddr */
168 BUS_SPACE_MAXADDR, /* highaddr */
169 NULL, NULL, /* filter, filterarg */
170 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
171 BUS_SPACE_UNRESTRICTED, /* nsegments */
172 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
173 0, /* flags */
174 NULL, NULL, /* lockfunc, lockarg */
175 &sc->mfi_parent_dmat)) {
176 device_printf(dev, "Cannot allocate parent DMA tag\n");
177 goto out;
178 }
179
180 m = mfi_find_ident(dev);
181 sc->mfi_flags = m->flags;
182
183 error = mfi_attach(sc);
184 out:
185 if (error) {
186 mfi_free(sc);
187 mfi_pci_free(sc);
188 }
189
190 return (error);
191 }
192
193 static int
194 mfi_pci_detach(device_t dev)
195 {
196 struct mfi_softc *sc;
197 struct mfi_ld *ld;
198 int error;
199
200 sc = device_get_softc(dev);
201
202 if ((sc->mfi_flags & MFI_FLAGS_OPEN) != 0)
203 return (EBUSY);
204
205 while ((ld = TAILQ_FIRST(&sc->mfi_ld_tqh)) != NULL) {
206 error = device_delete_child(dev, ld->ld_disk);
207 if (error)
208 return (error);
209 TAILQ_REMOVE(&sc->mfi_ld_tqh, ld, ld_link);
210 free(ld->ld_info, M_MFIBUF);
211 free(ld, M_MFIBUF);
212 }
213
214 EVENTHANDLER_DEREGISTER(shutdown_final, sc->mfi_eh);
215
216 mfi_shutdown(sc);
217 mfi_free(sc);
218 mfi_pci_free(sc);
219 return (0);
220 }
221
222 static void
223 mfi_pci_free(struct mfi_softc *sc)
224 {
225
226 if (sc->mfi_regs_resource != NULL) {
227 bus_release_resource(sc->mfi_dev, SYS_RES_MEMORY,
228 sc->mfi_regs_rid, sc->mfi_regs_resource);
229 }
230
231 return;
232 }
233
234 static int
235 mfi_pci_suspend(device_t dev)
236 {
237
238 return (EINVAL);
239 }
240
241 static int
242 mfi_pci_resume(device_t dev)
243 {
244
245 return (EINVAL);
246 }
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