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