tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
42static unsigned char alpa2target[] = {
430x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79,
440x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72,
450xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff,
460xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff,
470xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff,
480xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff,
490xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff,
500xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff,
510x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33,
520x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c,
530xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff,
540xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff,
550xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff,
560xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff,
570x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
58};
59
60static unsigned char target2alpa[] = {
610xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce,
620xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3,
630xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b,
640x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73,
650x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56,
660x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c,
670x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26,
680x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00
69};
70
71static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd);
72
73int fcal_slave_configure(struct 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... */
92int __init fcal_detect(struct 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
195int 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
212int 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 struct 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 */
282static 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
300static struct 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
318MODULE_LICENSE("GPL");
319