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/blk.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 "hosts.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
fcal_select_queue_depths(struct Scsi_Host * host,Scsi_Device * devlist)73 static void fcal_select_queue_depths(struct Scsi_Host *host, Scsi_Device *devlist)
74 {
75 Scsi_Device *device;
76
77 for (device = devlist; device; device = device->next) {
78 if (device->host != host) continue;
79 if (device->tagged_supported)
80 device->queue_depth = /* 254 */ 8;
81 else
82 device->queue_depth = 2;
83 }
84 }
85
86 /* Detect all FC Arbitrated Loops attached to the machine.
87 fc4 module has done all the work for us... */
fcal_detect(Scsi_Host_Template * tpnt)88 int __init fcal_detect(Scsi_Host_Template *tpnt)
89 {
90 int nfcals = 0;
91 fc_channel *fc;
92 int fcalcount;
93 int i;
94
95 tpnt->proc_name = "fcal";
96 fcalcount = 0;
97 for_each_online_fc_channel(fc)
98 if (fc->posmap)
99 fcalcount++;
100 FCALND(("%d channels online\n", fcalcount))
101 if (!fcalcount) {
102 #if defined(MODULE) && defined(CONFIG_FC4_SOCAL_MODULE) && defined(CONFIG_KMOD)
103 request_module("socal");
104
105 for_each_online_fc_channel(fc)
106 if (fc->posmap)
107 fcalcount++;
108 if (!fcalcount)
109 #endif
110 return 0;
111 }
112 for_each_online_fc_channel(fc) {
113 struct Scsi_Host *host;
114 long *ages;
115 struct fcal *fcal;
116
117 if (!fc->posmap) continue;
118
119 /* Strange, this is already registered to some other SCSI host, then it cannot be fcal */
120 if (fc->scsi_name[0]) continue;
121 memcpy (fc->scsi_name, "FCAL", 4);
122
123 fc->can_queue = FCAL_CAN_QUEUE;
124 fc->rsp_size = 64;
125 fc->encode_addr = fcal_encode_addr;
126
127 ages = kmalloc (128 * sizeof(long), GFP_KERNEL);
128 if (!ages) continue;
129
130 host = scsi_register (tpnt, sizeof (struct fcal));
131 if (!host)
132 {
133 kfree(ages);
134 continue;
135 }
136
137 nfcals++;
138
139 if (fc->module) __MOD_INC_USE_COUNT(fc->module);
140
141 fcal = (struct fcal *)host->hostdata;
142
143 fc->fcp_register(fc, TYPE_SCSI_FCP, 0);
144
145 for (i = 0; i < fc->posmap->len; i++) {
146 int status, target, alpa;
147
148 alpa = fc->posmap->list[i];
149 FCALD(("Sending PLOGI to %02x\n", alpa))
150 target = alpa2target[alpa];
151 status = fc_do_plogi(fc, alpa, fcal->node_wwn + target,
152 fcal->nport_wwn + target);
153 FCALD(("PLOGI returned with status %d\n", status))
154 if (status != FC_STATUS_OK)
155 continue;
156 FCALD(("Sending PRLI to %02x\n", alpa))
157 status = fc_do_prli(fc, alpa);
158 FCALD(("PRLI returned with status %d\n", status))
159 if (status == FC_STATUS_OK)
160 fcal->map[target] = 1;
161 }
162
163 host->max_id = 127;
164 host->irq = fc->irq;
165 #ifdef __sparc_v9__
166 host->unchecked_isa_dma = 1;
167 #endif
168 host->select_queue_depths = fcal_select_queue_depths;
169
170 fc->channels = 1;
171 fc->targets = 127;
172 fc->ages = ages;
173 memset (ages, 0, 128 * sizeof(long));
174
175 fcal->fc = fc;
176
177 FCALD(("Found FCAL\n"))
178 }
179 if (nfcals)
180 #ifdef __sparc__
181 printk ("FCAL: Total of %d Sun Enterprise Network Array (A5000 or EX500) channels found\n", nfcals);
182 #else
183 printk ("FCAL: Total of %d Fibre Channel Arbitrated Loops found\n", nfcals);
184 #endif
185 return nfcals;
186 }
187
fcal_release(struct Scsi_Host * host)188 int fcal_release(struct Scsi_Host *host)
189 {
190 struct fcal *fcal = (struct fcal *)host->hostdata;
191 fc_channel *fc = fcal->fc;
192
193 if (fc->module) __MOD_DEC_USE_COUNT(fc->module);
194
195 fc->fcp_register(fc, TYPE_SCSI_FCP, 1);
196 FCALND((" releasing fcal.\n"));
197 kfree (fc->ages);
198 FCALND(("released fcal!\n"));
199 return 0;
200 }
201
202 #undef SPRINTF
203 #define SPRINTF(args...) { if (pos < (buffer + length)) pos += sprintf (pos, ## args); }
204
fcal_proc_info(char * buffer,char ** start,off_t offset,int length,int hostno,int inout)205 int fcal_proc_info (char *buffer, char **start, off_t offset, int length, int hostno, int inout)
206 {
207 struct Scsi_Host *host = NULL;
208 struct fcal *fcal;
209 fc_channel *fc;
210 char *pos = buffer;
211 int i, j;
212
213 for (host=scsi_hostlist; host; host=host->next)
214 if (host->host_no == hostno)
215 break;
216
217 if (!host) return -ESRCH;
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: %s\n", host->host_queue ? "" : "none");
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 for (scd = host->host_queue ; scd; scd = scd->next)
249 if (scd->host->host_no == hostno && 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 */
fcal_encode_addr(Scsi_Cmnd * SCpnt,u16 * addr,fc_channel * fc,fcp_cmnd * fcmd)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->host->hostdata;
291 if (!f->map[SCpnt->target]) return -EINVAL;
292 /* Now, determine DID: It will be Native Identifier, so we zero upper
293 2 bytes of the 3 byte DID, lowest byte will be AL-PA */
294 fcmd->did = target2alpa[SCpnt->target];
295 FCALD(("trying DID %06x\n", fcmd->did))
296 return 0;
297 }
298
299 static Scsi_Host_Template driver_template = FCAL;
300
301 #include "scsi_module.c"
302
303 MODULE_LICENSE("GPL");
304