a6f120dcdfc37ae8e5c452d45d6065ff40b9f01d
[linux-2.6.git] / drivers / scsi / fcal.c
1 /* fcal.c: Fibre Channel Arbitrated Loop SCSI host adapter driver.
2  *
3  * Copyright (C) 1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
4  *
5  */
6
7 #include <linux/kernel.h>
8 #include <linux/delay.h>
9 #include <linux/types.h>
10 #include <linux/string.h>
11 #include <linux/slab.h>
12 #include <linux/blkdev.h>
13 #include <linux/proc_fs.h>
14 #include <linux/stat.h>
15 #include <linux/init.h>
16 #include <linux/config.h>
17 #ifdef CONFIG_KMOD
18 #include <linux/kmod.h>
19 #endif
20
21 #include <asm/irq.h>
22
23 #include "scsi.h"
24 #include <scsi/scsi_host.h>
25 #include "../fc4/fcp_impl.h"
26 #include "fcal.h"
27
28 #include <linux/module.h>
29
30 /* #define FCAL_DEBUG */
31
32 #define fcal_printk printk ("FCAL %s: ", fc->name); printk
33
34 #ifdef FCAL_DEBUG
35 #define FCALD(x)  fcal_printk x;
36 #define FCALND(x) printk ("FCAL: "); printk x;
37 #else
38 #define FCALD(x)
39 #define FCALND(x)
40 #endif
41
42 static unsigned char alpa2target[] = {
43 0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79,
44 0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72,
45 0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff,
46 0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff,
47 0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff,
48 0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff,
49 0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff,
50 0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff,
51 0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33,
52 0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c,
53 0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff,
54 0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff,
55 0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff,
56 0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff,
57 0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
58 };
59
60 static unsigned char target2alpa[] = {
61 0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce,
62 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3,
63 0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b,
64 0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73,
65 0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56,
66 0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c,
67 0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26,
68 0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00
69 };
70
71 static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
72
73 int fcal_slave_configure(Scsi_Device *device)
74 {
75         int depth_to_use;
76         
77         if (device->tagged_supported)
78                 depth_to_use = /* 254 */ 8;
79         else
80                 depth_to_use = 2;
81
82         scsi_adjust_queue_depth(device,
83                                 (device->tagged_supported ?
84                                  MSG_SIMPLE_TAG : 0),
85                                 depth_to_use);
86
87         return 0;
88 }
89
90 /* Detect all FC Arbitrated Loops attached to the machine.
91    fc4 module has done all the work for us... */
92 int __init fcal_detect(Scsi_Host_Template *tpnt)
93 {
94         int nfcals = 0;
95         fc_channel *fc;
96         int fcalcount;
97         int i;
98
99         tpnt->proc_name = "fcal";
100         fcalcount = 0;
101         for_each_online_fc_channel(fc)
102                 if (fc->posmap)
103                         fcalcount++;
104         FCALND(("%d channels online\n", fcalcount))
105         if (!fcalcount) {
106 #if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD)
107                 request_module("socal");
108                 
109                 for_each_online_fc_channel(fc)
110                         if (fc->posmap)
111                                 fcalcount++;
112                 if (!fcalcount)
113 #endif
114                         return 0;
115         }
116         for_each_online_fc_channel(fc) {
117                 struct Scsi_Host *host;
118                 long *ages;
119                 struct fcal *fcal;
120                 
121                 if (!fc->posmap) continue;
122                 
123                 /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */
124                 if (fc->scsi_name[0]) continue;
125                 memcpy (fc->scsi_name, "FCAL", 4);
126                 
127                 fc->can_queue = FCAL_CAN_QUEUE;
128                 fc->rsp_size = 64;
129                 fc->encode_addr = fcal_encode_addr;
130                 
131                 ages = kmalloc (128 * sizeof(long), GFP_KERNEL);
132                 if (!ages) continue;
133                                 
134                 host = scsi_register (tpnt, sizeof (struct fcal));
135                 if (!host) 
136                 {
137                         kfree(ages);
138                         continue;
139                 }
140                                 
141                 if (!try_module_get(fc->module)) {
142                         kfree(ages);
143                         scsi_unregister(host);
144                         continue;
145                 }
146         
147                 nfcals++;
148                                 
149                 fcal = (struct fcal *)host->hostdata;
150                 
151                 fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
152
153                 for (i = 0; i < fc->posmap->len; i++) {
154                         int status, target, alpa;
155
156                         alpa = fc->posmap->list[i];                     
157                         FCALD(("Sending PLOGI to %02x\n", alpa))
158                         target = alpa2target[alpa];
159                         status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, 
160                                              fcal->nport_wwn + target);
161                         FCALD(("PLOGI returned with status %d\n", status))
162                         if (status != FC_STATUS_OK)
163                                 continue;
164                         FCALD(("Sending PRLI to %02x\n", alpa))
165                         status = fc_do_prli(fc, alpa);
166                         FCALD(("PRLI returned with status %d\n", status))
167                         if (status == FC_STATUS_OK)
168                                 fcal->map[target] = 1;
169                 }
170                 
171                 host->max_id = 127;
172                 host->irq = fc->irq;
173 #ifdef __sparc_v9__
174                 host->unchecked_isa_dma = 1;
175 #endif
176
177                 fc->channels = 1;
178                 fc->targets = 127;
179                 fc->ages = ages;
180                 memset (ages, 0, 128 * sizeof(long));
181                                 
182                 fcal->fc = fc;
183                 
184                 FCALD(("Found FCAL\n"))
185         }
186         if (nfcals)
187 #ifdef __sparc__
188                 printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals);
189 #else
190                 printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals);
191 #endif
192         return nfcals;
193 }
194
195 int fcal_release(struct Scsi_Host *host)
196 {
197         struct fcal *fcal = (struct fcal *)host->hostdata;
198         fc_channel *fc = fcal->fc;
199
200         module_put(fc->module);
201         
202         fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
203         FCALND((" releasing fcal.\n"));
204         kfree (fc->ages);
205         FCALND(("released fcal!\n"));
206         return 0;
207 }
208
209 #undef SPRINTF
210 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
211
212 int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
213 {
214         struct fcal *fcal;
215         fc_channel *fc;
216         char *pos = buffer;
217         int i, j;
218
219         if (inout) return length;
220     
221         fcal = (struct fcal *)host->hostdata;
222         fc = fcal->fc;
223
224 #ifdef __sparc__
225         SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node);
226 #else
227         SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name);
228 #endif
229         SPRINTF ("Initiator AL-PA: %02x\n", fc->sid);
230
231         SPRINTF ("\nAttached devices:\n");
232         
233         for (i = 0; i < fc->posmap->len; i++) {
234                 unsigned char alpa = fc->posmap->list[i];
235                 unsigned char target;
236                 u32 *u1, *u2;
237                 
238                 target = alpa2target[alpa];
239                 u1 = (u32 *)&fcal->nport_wwn[target];
240                 u2 = (u32 *)&fcal->node_wwn[target];
241                 if (!u1[0] && !u1[1]) {
242                         SPRINTF ("  [AL-PA: %02x] Not responded to PLOGI\n", alpa);
243                 } else if (!fcal->map[target]) {
244                         SPRINTF ("  [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n",
245                                  alpa, u1[0], u1[1], u2[0], u2[1]);
246                 } else {
247                         Scsi_Device *scd;
248                         shost_for_each_device(scd, host)
249                                 if (scd->id == target) {
250                                         SPRINTF ("  [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x]  ",
251                                                 alpa, target, u1[0], u1[1], u2[0], u2[1]);
252                                         SPRINTF ("%s ", (scd->type < MAX_SCSI_DEVICE_CODE) ?
253                                                 scsi_device_types[(short) scd->type] : "Unknown device");
254
255                                         for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++)
256                                                 SPRINTF ("%c", scd->vendor[j]);
257                                         SPRINTF (" ");
258
259                                         for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++)
260                                                 SPRINTF ("%c", scd->model[j]);
261                 
262                                         SPRINTF ("\n");
263                                 }
264                 }
265         }
266         SPRINTF ("\n");
267
268         *start = buffer + offset;
269
270         if ((pos - buffer) < offset)
271                 return 0;
272         else if (pos - buffer - offset < length)
273                 return pos - buffer - offset;
274         else
275                 return length;
276 }
277
278 /* 
279    For FC-AL, we use a simple addressing: we have just one channel 0,
280    and all AL-PAs are mapped to targets 0..0x7e
281  */
282 static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
283 {
284         struct fcal *f;
285         
286         /* We don't support LUNs yet - I'm not sure if LUN should be in SCSI fcp_cdb, or in second byte of addr[0] */
287         if (SCpnt->cmnd[1] & 0xe0) return -EINVAL;
288         /* FC-PLDA tells us... */
289         memset(addr, 0, 8);
290         f = (struct fcal *)SCpnt->device->host->hostdata;
291         if (!f->map[SCpnt->device->id])
292                 return -EINVAL;
293         /* Now, determine DID: It will be Native Identifier, so we zero upper
294            2 bytes of the 3 byte DID, lowest byte will be AL-PA */
295         fcmd->did = target2alpa[SCpnt->device->id];
296         FCALD(("trying DID %06x\n", fcmd->did))
297         return 0;
298 }
299
300 static Scsi_Host_Template driver_template = {
301         .name                   = "Fibre Channel Arbitrated Loop",
302         .detect                 = fcal_detect,
303         .release                = fcal_release, 
304         .proc_info              = fcal_proc_info,
305         .queuecommand           = fcp_scsi_queuecommand,
306         .slave_configure        = fcal_slave_configure,
307         .can_queue              = FCAL_CAN_QUEUE,
308         .this_id                = -1,
309         .sg_tablesize           = 1,
310         .cmd_per_lun            = 1,
311         .use_clustering         = ENABLE_CLUSTERING,
312         .eh_abort_handler       = fcp_scsi_abort,
313         .eh_device_reset_handler = fcp_scsi_dev_reset,
314         .eh_host_reset_handler  = fcp_scsi_host_reset,
315 };
316 #include "scsi_module.c"
317
318 MODULE_LICENSE("GPL");
319