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 41static unsigned char alpa2target[] = { 420x7e, 0x7d, 0x7c, 0xff, 0x7b, 0xff, 0xff, 0xff, 0x7a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x79, 430x78, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x77, 0x76, 0xff, 0xff, 0x75, 0xff, 0x74, 0x73, 0x72, 440xff, 0xff, 0xff, 0x71, 0xff, 0x70, 0x6f, 0x6e, 0xff, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x68, 0xff, 450xff, 0x67, 0x66, 0x65, 0x64, 0x63, 0x62, 0xff, 0xff, 0x61, 0x60, 0xff, 0x5f, 0xff, 0xff, 0xff, 460xff, 0xff, 0xff, 0x5e, 0xff, 0x5d, 0x5c, 0x5b, 0xff, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55, 0xff, 470xff, 0x54, 0x53, 0x52, 0x51, 0x50, 0x4f, 0xff, 0xff, 0x4e, 0x4d, 0xff, 0x4c, 0xff, 0xff, 0xff, 480xff, 0xff, 0xff, 0x4b, 0xff, 0x4a, 0x49, 0x48, 0xff, 0x47, 0x46, 0x45, 0x44, 0x43, 0x42, 0xff, 490xff, 0x41, 0x40, 0x3f, 0x3e, 0x3d, 0x3c, 0xff, 0xff, 0x3b, 0x3a, 0xff, 0x39, 0xff, 0xff, 0xff, 500x38, 0x37, 0x36, 0xff, 0x35, 0xff, 0xff, 0xff, 0x34, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x33, 510x32, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x31, 0x30, 0xff, 0xff, 0x2f, 0xff, 0x2e, 0x2d, 0x2c, 520xff, 0xff, 0xff, 0x2b, 0xff, 0x2a, 0x29, 0x28, 0xff, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0xff, 530xff, 0x21, 0x20, 0x1f, 0x1e, 0x1d, 0x1c, 0xff, 0xff, 0x1b, 0x1a, 0xff, 0x19, 0xff, 0xff, 0xff, 540xff, 0xff, 0xff, 0x18, 0xff, 0x17, 0x16, 0x15, 0xff, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0f, 0xff, 550xff, 0x0e, 0x0d, 0x0c, 0x0b, 0x0a, 0x09, 0xff, 0xff, 0x08, 0x07, 0xff, 0x06, 0xff, 0xff, 0xff, 560x05, 0x04, 0x03, 0xff, 0x02, 0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 57}; 58 59static unsigned char target2alpa[] = { 600xef, 0xe8, 0xe4, 0xe2, 0xe1, 0xe0, 0xdc, 0xda, 0xd9, 0xd6, 0xd5, 0xd4, 0xd3, 0xd2, 0xd1, 0xce, 610xcd, 0xcc, 0xcb, 0xca, 0xc9, 0xc7, 0xc6, 0xc5, 0xc3, 0xbc, 0xba, 0xb9, 0xb6, 0xb5, 0xb4, 0xb3, 620xb2, 0xb1, 0xae, 0xad, 0xac, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa5, 0xa3, 0x9f, 0x9e, 0x9d, 0x9b, 630x98, 0x97, 0x90, 0x8f, 0x88, 0x84, 0x82, 0x81, 0x80, 0x7c, 0x7a, 0x79, 0x76, 0x75, 0x74, 0x73, 640x72, 0x71, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x69, 0x67, 0x66, 0x65, 0x63, 0x5c, 0x5a, 0x59, 0x56, 650x55, 0x54, 0x53, 0x52, 0x51, 0x4e, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3c, 660x3a, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x27, 0x26, 670x25, 0x23, 0x1f, 0x1e, 0x1d, 0x1b, 0x18, 0x17, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x00 68}; 69 70static int fcal_encode_addr(Scsi_Cmnd *SCpnt, u16 *addr, fc_channel *fc, fcp_cmnd *fcmd); 71 72int 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... */ 91int __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 194int 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 211int 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 */ 280static 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 298static 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 316MODULE_LICENSE("GPL"); 317