initial commit
[freebsd-arm:freebsd-arm.git] / compat / linsysfs / linsysfs.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("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/queue.h>
32 #include <sys/blist.h>
33 #include <sys/conf.h>
34 #include <sys/exec.h>
35 #include <sys/filedesc.h>
36 #include <sys/kernel.h>
37 #include <sys/linker.h>
38 #include <sys/malloc.h>
39 #include <sys/mount.h>
40 #include <sys/mutex.h>
41 #include <sys/proc.h>
42 #include <sys/resourcevar.h>
43 #include <sys/sbuf.h>
44 #include <sys/smp.h>
45 #include <sys/socket.h>
46 #include <sys/vnode.h>
47 #include <sys/bus.h>
48 #include <sys/pciio.h>
49
50 #include <dev/pci/pcivar.h>
51 #include <dev/pci/pcireg.h>
52
53 #include <net/if.h>
54
55 #include <vm/vm.h>
56 #include <vm/pmap.h>
57 #include <vm/vm_map.h>
58 #include <vm/vm_param.h>
59 #include <vm/vm_object.h>
60 #include <vm/swap_pager.h>
61
62 #include <machine/bus.h>
63
64 #include "opt_compat.h"
65 #ifdef COMPAT_LINUX32                           /* XXX */
66 #include <machine/../linux32/linux.h>
67 #else
68 #include <machine/../linux/linux.h>
69 #endif
70 #include <compat/linux/linux_ioctl.h>
71 #include <compat/linux/linux_mib.h>
72 #include <compat/linux/linux_util.h>
73 #include <fs/pseudofs/pseudofs.h>
74
75 struct scsi_host_queue {
76         TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
77         char *path;
78         char *name;
79 };
80
81 TAILQ_HEAD(,scsi_host_queue) scsi_host_q;
82
83 static int host_number = 0;
84
85 static int
86 atoi(const char *str)
87 {
88         return (int)strtol(str, (char **)NULL, 10);
89 }
90
91 /*
92  * Filler function for proc_name
93  */
94 static int
95 linsysfs_scsiname(PFS_FILL_ARGS)
96 {
97         struct scsi_host_queue *scsi_host;
98         int index;
99
100         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
101                 index = atoi(&pn->pn_parent->pn_name[4]);
102         } else {
103                 sbuf_printf(sb, "unknown\n");
104                 return (0);
105         }
106         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
107                 if (index-- == 0) {
108                         sbuf_printf(sb, "%s\n", scsi_host->name);
109                         return (0);
110                 }
111         }
112         sbuf_printf(sb, "unknown\n");
113         return (0);
114 }
115
116 /*
117  * Filler function for device sym-link
118  */
119 static int
120 linsysfs_link_scsi_host(PFS_FILL_ARGS)
121 {
122         struct scsi_host_queue *scsi_host;
123         int index;
124
125         if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
126                 index = atoi(&pn->pn_parent->pn_name[4]);
127         } else {
128                 sbuf_printf(sb, "unknown\n");
129                 return (0);
130         }
131         TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
132                 if (index-- == 0) {
133                         sbuf_printf(sb, "../../../devices%s", scsi_host->path);
134                         return(0);
135                 }
136         }
137         sbuf_printf(sb, "unknown\n");
138         return (0);
139 }
140
141 #define PCI_DEV "pci"
142 static int
143 linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi, char *path,
144    char *prefix)
145 {
146         struct scsi_host_queue *scsi_host;
147         struct pfs_node *sub_dir;
148         int i, nchildren;
149         device_t *children, parent;
150         devclass_t devclass;
151         const char *name = NULL;
152         struct pci_devinfo *dinfo;
153         char *device, *host, *new_path = path;
154
155         parent = device_get_parent(dev);
156         if (parent) {
157                 devclass = device_get_devclass(parent);
158                 if (devclass != NULL)
159                         name = devclass_get_name(devclass);
160                 if (name && strcmp(name, PCI_DEV) == 0) {
161                         dinfo = device_get_ivars(dev);
162                         if (dinfo) {
163                                 device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
164                                 new_path = malloc(MAXPATHLEN, M_TEMP,
165                                     M_WAITOK);
166                                 new_path[0] = '\000';
167                                 strcpy(new_path, path);
168                                 host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
169                                 device[0] = '\000';
170                                 sprintf(device, "%s:%02x:%02x.%x",
171                                     prefix,
172                                     dinfo->cfg.bus,
173                                     dinfo->cfg.slot,
174                                     dinfo->cfg.func);
175                                 strcat(new_path, "/");
176                                 strcat(new_path, device);
177                                 dir = pfs_create_dir(dir, device,
178                                     NULL, NULL, NULL, 0);
179
180                                 if (dinfo->cfg.baseclass == PCIC_STORAGE) {
181                                         /* DJA only make this if needed */
182                                         sprintf(host, "host%d", host_number++);
183                                         strcat(new_path, "/");
184                                         strcat(new_path, host);
185                                         sub_dir = pfs_create_dir(dir,
186                                             host, NULL, NULL, NULL, 0);
187                                         scsi_host = malloc(sizeof(
188                                             struct scsi_host_queue),
189                                             M_DEVBUF, M_NOWAIT);
190                                         scsi_host->path = malloc(
191                                             strlen(new_path) + 1,
192                                             M_DEVBUF, M_NOWAIT);
193                                         scsi_host->path[0] = '\000';
194                                         bcopy(new_path, scsi_host->path,
195                                             strlen(new_path) + 1);
196                                         scsi_host->name = "unknown";
197
198                                         sub_dir = pfs_create_dir(scsi, host,
199                                             NULL, NULL, NULL, 0);
200                                         pfs_create_link(sub_dir, "device",
201                                             &linsysfs_link_scsi_host,
202                                             NULL, NULL, NULL, 0);
203                                         pfs_create_file(sub_dir, "proc_name",
204                                             &linsysfs_scsiname,
205                                             NULL, NULL, NULL, PFS_RD);
206                                         scsi_host->name
207                                             = linux_driver_get_name_dev(dev);
208                                         TAILQ_INSERT_TAIL(&scsi_host_q,
209                                             scsi_host, scsi_host_next);
210                                 }
211                                 free(device, M_TEMP);
212                                 free(host, M_TEMP);
213                         }
214                 }
215         }
216
217         device_get_children(dev, &children, &nchildren);
218         for (i = 0; i < nchildren; i++) {
219                 if (children[i])
220                         linsysfs_run_bus(children[i], dir, scsi, new_path, prefix);
221         }
222         if (new_path != path)
223                 free(new_path, M_TEMP);
224
225         return (1);
226 }
227
228 /*
229  * Constructor
230  */
231 static int
232 linsysfs_init(PFS_INIT_ARGS)
233 {
234         struct pfs_node *root;
235         struct pfs_node *dir;
236         struct pfs_node *pci;
237         struct pfs_node *scsi;
238         devclass_t devclass;
239         device_t dev;
240
241         TAILQ_INIT(&scsi_host_q);
242
243         root = pi->pi_root;
244
245         /* /sys/class/... */
246         scsi = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
247         scsi = pfs_create_dir(scsi, "scsi_host", NULL, NULL, NULL, 0);
248
249         /* /sys/device */
250         dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
251
252         /* /sys/device/pci0000:00 */
253         pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
254
255         devclass = devclass_find("root");
256         if (devclass == NULL) {
257                 return (0);
258         }
259
260         dev = devclass_get_device(devclass, 0);
261         linsysfs_run_bus(dev, pci, scsi, "/pci0000:00", "0000");
262         return (0);
263 }
264
265 /*
266  * Destructor
267  */
268 static int
269 linsysfs_uninit(PFS_INIT_ARGS)
270 {
271         struct scsi_host_queue *scsi_host, *scsi_host_tmp;
272
273         TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next,
274             scsi_host_tmp) {
275                 TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next);
276                 free(scsi_host->path, M_TEMP);
277                 free(scsi_host, M_TEMP);
278         }
279
280         return (0);
281 }
282
283 PSEUDOFS(linsysfs, 1);
284 MODULE_DEPEND(linsysfs, linux, 1, 1, 1);