pata_cs5536: ATA driver for Geode companion chip
[linux-2.6] / 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 #ifdef CONFIG_KMOD
17 #include <linux/kmod.h>
18 #endif
19
20 #include <asm/irq.h>
21
22 #include "scsi.h"
23 #include <scsi/scsi_host.h>
24 #include "../fc4/fcp_impl.h"
25 #include "fcal.h"
26
27 #include <linux/module.h>
28
29 /* #define FCAL_DEBUG */
30
31 #define fcal_printk printk ("FCAL %s: ", fc->name); printk
32
33 #ifdef FCAL_DEBUG
34 #define FCALD(x)  fcal_printk x;
35 #define FCALND(x) printk ("FCAL: "); printk x;
36 #else
37 #define FCALD(x)
38 #define FCALND(x)
39 #endif
40
41 static unsigned char alpa2target[] = {
42 0x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79,
43 0x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72,
44 0xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff,
45 0xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff,
46 0xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff,
47 0xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff,
48 0xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff,
49 0xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff,
50 0x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33,
51 0x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c,
52 0xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff,
53 0xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff,
54 0xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff,
55 0xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff,
56 0x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
57 };
58
59 static unsigned char target2alpa[] = {
60 0xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce,
61 0xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3,
62 0xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b,
63 0x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73,
64 0x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56,
65 0x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c,
66 0x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26,
67 0x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00
68 };
69
70 static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
71
72 int fcal_slave_configure(struct scsi_device *device)
73 {
74         int depth_to_use;
75         
76         if (device->tagged_supported)
77                 depth_to_use = /* 254 */ 8;
78         else
79                 depth_to_use = 2;
80
81         scsi_adjust_queue_depth(device,
82                                 (device->tagged_supported ?
83                                  MSG_SIMPLE_TAG : 0),
84                                 depth_to_use);
85
86         return 0;
87 }
88
89 /* Detect all FC Arbitrated Loops attached to the machine.
90    fc4 module has done all the work for us... */
91 int __init fcal_detect(struct scsi_host_template *tpnt)
92 {
93         int nfcals = 0;
94         fc_channel *fc;
95         int fcalcount;
96         int i;
97
98         tpnt->proc_name = "fcal";
99         fcalcount = 0;
100         for_each_online_fc_channel(fc)
101                 if (fc->posmap)
102                         fcalcount++;
103         FCALND(("%d channels online\n", fcalcount))
104         if (!fcalcount) {
105 #if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD)
106                 request_module("socal");
107                 
108                 for_each_online_fc_channel(fc)
109                         if (fc->posmap)
110                                 fcalcount++;
111                 if (!fcalcount)
112 #endif
113                         return 0;
114         }
115         for_each_online_fc_channel(fc) {
116                 struct Scsi_Host *host;
117                 long *ages;
118                 struct fcal *fcal;
119                 
120                 if (!fc->posmap) continue;
121                 
122                 /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */
123                 if (fc->scsi_name[0]) continue;
124                 memcpy (fc->scsi_name, "FCAL", 4);
125                 
126                 fc->can_queue = FCAL_CAN_QUEUE;
127                 fc->rsp_size = 64;
128                 fc->encode_addr = fcal_encode_addr;
129                 
130                 ages = kmalloc (128 * sizeof(long), GFP_KERNEL);
131                 if (!ages) continue;
132                                 
133                 host = scsi_register (tpnt, sizeof (struct fcal));
134                 if (!host) 
135                 {
136                         kfree(ages);
137                         continue;
138                 }
139                                 
140                 if (!try_module_get(fc->module)) {
141                         kfree(ages);
142                         scsi_unregister(host);
143                         continue;
144                 }
145         
146                 nfcals++;
147                                 
148                 fcal = (struct fcal *)host->hostdata;
149                 
150                 fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
151
152                 for (i = 0; i < fc->posmap->len; i++) {
153                         int status, target, alpa;
154
155                         alpa = fc->posmap->list[i];                     
156                         FCALD(("Sending PLOGI to %02x\n", alpa))
157                         target = alpa2target[alpa];
158                         status = fc_do_plogi(fc, alpa, fcal->node_wwn + target, 
159                                              fcal->nport_wwn + target);
160                         FCALD(("PLOGI returned with status %d\n", status))
161                         if (status != FC_STATUS_OK)
162                                 continue;
163                         FCALD(("Sending PRLI to %02x\n", alpa))
164                         status = fc_do_prli(fc, alpa);
165                         FCALD(("PRLI returned with status %d\n", status))
166                         if (status == FC_STATUS_OK)
167                                 fcal->map[target] = 1;
168                 }
169                 
170                 host->max_id = 127;
171                 host->irq = fc->irq;
172 #ifdef __sparc_v9__
173                 host->unchecked_isa_dma = 1;
174 #endif
175
176                 fc->channels = 1;
177                 fc->targets = 127;
178                 fc->ages = ages;
179                 memset (ages, 0, 128 * sizeof(long));
180                                 
181                 fcal->fc = fc;
182                 
183                 FCALD(("Found FCAL\n"))
184         }
185         if (nfcals)
186 #ifdef __sparc__
187                 printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals);
188 #else
189                 printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals);
190 #endif
191         return nfcals;
192 }
193
194 int fcal_release(struct Scsi_Host *host)
195 {
196         struct fcal *fcal = (struct fcal *)host->hostdata;
197         fc_channel *fc = fcal->fc;
198
199         module_put(fc->module);
200         
201         fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
202         FCALND((" releasing fcal.\n"));
203         kfree (fc->ages);
204         FCALND(("released fcal!\n"));
205         return 0;
206 }
207
208 #undef SPRINTF
209 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
210
211 int fcal_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int inout)
212 {
213         struct fcal *fcal;
214         fc_channel *fc;
215         char *pos = buffer;
216         int i, j;
217
218         if (inout) return length;
219     
220         fcal = (struct fcal *)host->hostdata;
221         fc = fcal->fc;
222
223 #ifdef __sparc__
224         SPRINTF ("Sun Enterprise Network Array (A5000 or E?500) on %s PROM node %x\n", fc->name, fc->dev->prom_node);
225 #else
226         SPRINTF ("Fibre Channel Arbitrated Loop on %s\n", fc->name);
227 #endif
228         SPRINTF ("Initiator AL-PA: %02x\n", fc->sid);
229
230         SPRINTF ("\nAttached devices:\n");
231         
232         for (i = 0; i < fc->posmap->len; i++) {
233                 unsigned char alpa = fc->posmap->list[i];
234                 unsigned char target;
235                 u32 *u1, *u2;
236                 
237                 target = alpa2target[alpa];
238                 u1 = (u32 *)&fcal->nport_wwn[target];
239                 u2 = (u32 *)&fcal->node_wwn[target];
240                 if (!u1[0] && !u1[1]) {
241                         SPRINTF ("  [AL-PA: %02x] Not responded to PLOGI\n", alpa);
242                 } else if (!fcal->map[target]) {
243                         SPRINTF ("  [AL-PA: %02x, Port WWN: %08x%08x, Node WWN: %08x%08x] Not responded to PRLI\n",
244                                  alpa, u1[0], u1[1], u2[0], u2[1]);
245                 } else {
246                         struct scsi_device *scd;
247                         shost_for_each_device(scd, host)
248                                 if (scd->id == target) {
249                                         SPRINTF ("  [AL-PA: %02x, Id: %02d, Port WWN: %08x%08x, Node WWN: %08x%08x]  ",
250                                                 alpa, target, u1[0], u1[1], u2[0], u2[1]);
251                                         SPRINTF ("%s ", scsi_device_type(scd->type));
252
253                                         for (j = 0; (j < 8) && (scd->vendor[j] >= 0x20); j++)
254                                                 SPRINTF ("%c", scd->vendor[j]);
255                                         SPRINTF (" ");
256
257                                         for (j = 0; (j < 16) && (scd->model[j] >= 0x20); j++)
258                                                 SPRINTF ("%c", scd->model[j]);
259                 
260                                         SPRINTF ("\n");
261                                 }
262                 }
263         }
264         SPRINTF ("\n");
265
266         *start = buffer + offset;
267
268         if ((pos - buffer) < offset)
269                 return 0;
270         else if (pos - buffer - offset < length)
271                 return pos - buffer - offset;
272         else
273                 return length;
274 }
275
276 /* 
277    For FC-AL, we use a simple addressing: we have just one channel 0,
278    and all AL-PAs are mapped to targets 0..0x7e
279  */
280 static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd)
281 {
282         struct fcal *f;
283         
284         /* 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] */
285         if (SCpnt->cmnd[1] & 0xe0) return -EINVAL;
286         /* FC-PLDA tells us... */
287         memset(addr, 0, 8);
288         f = (struct fcal *)SCpnt->device->host->hostdata;
289         if (!f->map[SCpnt->device->id])
290                 return -EINVAL;
291         /* Now, determine DID: It will be Native Identifier, so we zero upper
292            2 bytes of the 3 byte DID, lowest byte will be AL-PA */
293         fcmd->did = target2alpa[SCpnt->device->id];
294         FCALD(("trying DID %06x\n", fcmd->did))
295         return 0;
296 }
297
298 static struct scsi_host_template driver_template = {
299         .name                   = "Fibre Channel Arbitrated Loop",
300         .detect                 = fcal_detect,
301         .release                = fcal_release, 
302         .proc_info              = fcal_proc_info,
303         .queuecommand           = fcp_scsi_queuecommand,
304         .slave_configure        = fcal_slave_configure,
305         .can_queue              = FCAL_CAN_QUEUE,
306         .this_id                = -1,
307         .sg_tablesize           = 1,
308         .cmd_per_lun            = 1,
309         .use_clustering         = ENABLE_CLUSTERING,
310         .eh_abort_handler       = fcp_scsi_abort,
311         .eh_device_reset_handler = fcp_scsi_dev_reset,
312         .eh_host_reset_handler  = fcp_scsi_host_reset,
313 };
314 #include "scsi_module.c"
315
316 MODULE_LICENSE("GPL");
317