Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* fc.c: Generic Fibre Channel and FC4 SCSI driver. |
| 2 | * |
| 3 | * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz) |
| 4 | * Copyright (C) 1997,1998 Jirka Hanika (geo@ff.cuni.cz) |
| 5 | * |
| 6 | * There are two kinds of Fibre Channel adapters used in Linux. Either |
| 7 | * the adapter is "smart" and does all FC bookkeeping by itself and |
| 8 | * just presents a standard SCSI interface to the operating system |
| 9 | * (that's e.g. the case with Qlogic FC cards), or leaves most of the FC |
| 10 | * bookkeeping to the OS (e.g. soc, socal). Drivers for the former adapters |
| 11 | * will look like normal SCSI drivers (with the exception of max_id will be |
| 12 | * usually 127), the latter on the other side allows SCSI, IP over FC and other |
| 13 | * protocols. This driver tree is for the latter adapters. |
| 14 | * |
| 15 | * This file should support both Point-to-Point and Arbitrated Loop topologies. |
| 16 | * |
| 17 | * Sources: |
| 18 | * Fibre Channel Physical & Signaling Interface (FC-PH), dpANS, 1994 |
| 19 | * dpANS Fibre Channel Protocol for SCSI (X3.269-199X), Rev. 012, 1995 |
| 20 | * Fibre Channel Arbitrated Loop (FC-AL), Rev. 4.5, 1995 |
| 21 | * Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), Rev. 2.1, 1997 |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/jiffies.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/fcntl.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/ptrace.h> |
| 31 | #include <linux/ioport.h> |
| 32 | #include <linux/in.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <linux/string.h> |
| 35 | #include <linux/init.h> |
| 36 | |
| 37 | #include <asm/pgtable.h> |
| 38 | #include <asm/irq.h> |
| 39 | #include <asm/semaphore.h> |
| 40 | #include "fcp_impl.h" |
| 41 | #include <scsi/scsi_host.h> |
| 42 | |
| 43 | /* #define FCDEBUG */ |
| 44 | |
| 45 | #define fc_printk printk ("%s: ", fc->name); printk |
| 46 | |
| 47 | #ifdef FCDEBUG |
| 48 | #define FCD(x) fc_printk x; |
| 49 | #define FCND(x) printk ("FC: "); printk x; |
| 50 | #else |
| 51 | #define FCD(x) |
| 52 | #define FCND(x) |
| 53 | #endif |
| 54 | |
| 55 | #ifdef __sparc__ |
| 56 | #define dma_alloc_consistent(d,s,p) sbus_alloc_consistent(d,s,p) |
| 57 | #define dma_free_consistent(d,s,v,h) sbus_free_consistent(d,s,v,h) |
| 58 | #define dma_map_single(d,v,s,dir) sbus_map_single(d,v,s,dir) |
| 59 | #define dma_unmap_single(d,h,s,dir) sbus_unmap_single(d,h,s,dir) |
| 60 | #define dma_map_sg(d,s,n,dir) sbus_map_sg(d,s,n,dir) |
| 61 | #define dma_unmap_sg(d,s,n,dir) sbus_unmap_sg(d,s,n,dir) |
| 62 | #else |
| 63 | #define dma_alloc_consistent(d,s,p) pci_alloc_consistent(d,s,p) |
| 64 | #define dma_free_consistent(d,s,v,h) pci_free_consistent(d,s,v,h) |
| 65 | #define dma_map_single(d,v,s,dir) pci_map_single(d,v,s,dir) |
| 66 | #define dma_unmap_single(d,h,s,dir) pci_unmap_single(d,h,s,dir) |
| 67 | #define dma_map_sg(d,s,n,dir) pci_map_sg(d,s,n,dir) |
| 68 | #define dma_unmap_sg(d,s,n,dir) pci_unmap_sg(d,s,n,dir) |
| 69 | #endif |
| 70 | |
| 71 | #define FCP_CMND(SCpnt) ((fcp_cmnd *)&(SCpnt->SCp)) |
| 72 | #define FC_SCMND(SCpnt) ((fc_channel *)(SCpnt->device->host->hostdata[0])) |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 73 | #define SC_FCMND(fcmnd) ((struct scsi_cmnd *)((long)fcmnd - (long)&(((struct scsi_cmnd *)0)->SCp))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 75 | static int fcp_scsi_queue_it(fc_channel *, struct scsi_cmnd *, fcp_cmnd *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | void fcp_queue_empty(fc_channel *); |
| 77 | |
| 78 | static void fcp_scsi_insert_queue (fc_channel *fc, fcp_cmnd *fcmd) |
| 79 | { |
| 80 | if (!fc->scsi_que) { |
| 81 | fc->scsi_que = fcmd; |
| 82 | fcmd->next = fcmd; |
| 83 | fcmd->prev = fcmd; |
| 84 | } else { |
| 85 | fc->scsi_que->prev->next = fcmd; |
| 86 | fcmd->prev = fc->scsi_que->prev; |
| 87 | fc->scsi_que->prev = fcmd; |
| 88 | fcmd->next = fc->scsi_que; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | static void fcp_scsi_remove_queue (fc_channel *fc, fcp_cmnd *fcmd) |
| 93 | { |
| 94 | if (fcmd == fcmd->next) { |
| 95 | fc->scsi_que = NULL; |
| 96 | return; |
| 97 | } |
| 98 | if (fcmd == fc->scsi_que) |
| 99 | fc->scsi_que = fcmd->next; |
| 100 | fcmd->prev->next = fcmd->next; |
| 101 | fcmd->next->prev = fcmd->prev; |
| 102 | } |
| 103 | |
| 104 | fc_channel *fc_channels = NULL; |
| 105 | |
| 106 | #define LSMAGIC 620829043 |
| 107 | typedef struct { |
| 108 | /* Must be first */ |
| 109 | struct semaphore sem; |
| 110 | int magic; |
| 111 | int count; |
| 112 | logi *logi; |
| 113 | fcp_cmnd *fcmds; |
| 114 | atomic_t todo; |
| 115 | struct timer_list timer; |
| 116 | unsigned char grace[0]; |
| 117 | } ls; |
| 118 | |
| 119 | #define LSOMAGIC 654907799 |
| 120 | typedef struct { |
| 121 | /* Must be first */ |
| 122 | struct semaphore sem; |
| 123 | int magic; |
| 124 | int count; |
| 125 | fcp_cmnd *fcmds; |
| 126 | atomic_t todo; |
| 127 | struct timer_list timer; |
| 128 | } lso; |
| 129 | |
| 130 | #define LSEMAGIC 84482456 |
| 131 | typedef struct { |
| 132 | /* Must be first */ |
| 133 | struct semaphore sem; |
| 134 | int magic; |
| 135 | int status; |
| 136 | struct timer_list timer; |
| 137 | } lse; |
| 138 | |
| 139 | static void fcp_login_timeout(unsigned long data) |
| 140 | { |
| 141 | ls *l = (ls *)data; |
| 142 | FCND(("Login timeout\n")) |
| 143 | up(&l->sem); |
| 144 | } |
| 145 | |
| 146 | static void fcp_login_done(fc_channel *fc, int i, int status) |
| 147 | { |
| 148 | fcp_cmnd *fcmd; |
| 149 | logi *plogi; |
| 150 | fc_hdr *fch; |
| 151 | ls *l = (ls *)fc->ls; |
| 152 | |
| 153 | FCD(("Login done %d %d\n", i, status)) |
| 154 | if (i < l->count) { |
| 155 | if (fc->state == FC_STATE_FPORT_OK) { |
| 156 | FCD(("Additional FPORT_OK received with status %d\n", status)) |
| 157 | return; |
| 158 | } |
| 159 | switch (status) { |
| 160 | case FC_STATUS_OK: /* Oh, we found a fabric */ |
| 161 | case FC_STATUS_P_RJT: /* Oh, we haven't found any */ |
| 162 | fc->state = FC_STATE_FPORT_OK; |
| 163 | fcmd = l->fcmds + i; |
| 164 | plogi = l->logi + 3 * i; |
| 165 | dma_unmap_single (fc->dev, fcmd->cmd, 3 * sizeof(logi), |
| 166 | DMA_BIDIRECTIONAL); |
| 167 | plogi->code = LS_PLOGI; |
| 168 | memcpy (&plogi->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn)); |
| 169 | memcpy (&plogi->node_wwn, &fc->wwn_node, sizeof(fc_wwn)); |
| 170 | memcpy (&plogi->common, fc->common_svc, sizeof(common_svc_parm)); |
| 171 | memcpy (&plogi->class1, fc->class_svcs, 3*sizeof(svc_parm)); |
| 172 | fch = &fcmd->fch; |
| 173 | fcmd->token += l->count; |
| 174 | FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, fc->did); |
| 175 | FILL_FCHDR_SID(fch, fc->sid); |
| 176 | #ifdef FCDEBUG |
| 177 | { |
| 178 | int i; |
| 179 | unsigned *x = (unsigned *)plogi; |
| 180 | printk ("logi: "); |
| 181 | for (i = 0; i < 21; i++) |
| 182 | printk ("%08x ", x[i]); |
| 183 | printk ("\n"); |
| 184 | } |
| 185 | #endif |
| 186 | fcmd->cmd = dma_map_single (fc->dev, plogi, 3 * sizeof(logi), |
| 187 | DMA_BIDIRECTIONAL); |
| 188 | fcmd->rsp = fcmd->cmd + 2 * sizeof(logi); |
| 189 | if (fc->hw_enque (fc, fcmd)) |
| 190 | printk ("FC: Cannot enque PLOGI packet on %s\n", fc->name); |
| 191 | break; |
| 192 | case FC_STATUS_ERR_OFFLINE: |
| 193 | fc->state = FC_STATE_MAYBEOFFLINE; |
| 194 | FCD (("FC is offline %d\n", l->grace[i])) |
| 195 | break; |
| 196 | default: |
| 197 | printk ("FLOGI failed for %s with status %d\n", fc->name, status); |
| 198 | /* Do some sort of error recovery here */ |
| 199 | break; |
| 200 | } |
| 201 | } else { |
| 202 | i -= l->count; |
| 203 | if (fc->state != FC_STATE_FPORT_OK) { |
| 204 | FCD(("Unexpected N-PORT rsp received")) |
| 205 | return; |
| 206 | } |
| 207 | switch (status) { |
| 208 | case FC_STATUS_OK: |
| 209 | plogi = l->logi + 3 * i; |
| 210 | dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), |
| 211 | DMA_BIDIRECTIONAL); |
| 212 | if (!fc->wwn_dest.lo && !fc->wwn_dest.hi) { |
| 213 | memcpy (&fc->wwn_dest, &plogi[1].node_wwn, sizeof(fc_wwn)); |
| 214 | FCD(("Dest WWN %08x%08x\n", *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo)) |
| 215 | } else if (fc->wwn_dest.lo != plogi[1].node_wwn.lo || |
| 216 | fc->wwn_dest.hi != plogi[1].node_wwn.hi) { |
| 217 | printk ("%s: mismatch in wwns. Got %08x%08x, expected %08x%08x\n", |
| 218 | fc->name, |
| 219 | *(u32 *)&plogi[1].node_wwn, plogi[1].node_wwn.lo, |
| 220 | *(u32 *)&fc->wwn_dest, fc->wwn_dest.lo); |
| 221 | } |
| 222 | fc->state = FC_STATE_ONLINE; |
| 223 | printk ("%s: ONLINE\n", fc->name); |
| 224 | if (atomic_dec_and_test (&l->todo)) |
| 225 | up(&l->sem); |
| 226 | break; |
| 227 | case FC_STATUS_ERR_OFFLINE: |
| 228 | fc->state = FC_STATE_OFFLINE; |
| 229 | dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), |
| 230 | DMA_BIDIRECTIONAL); |
| 231 | printk ("%s: FC is offline\n", fc->name); |
| 232 | if (atomic_dec_and_test (&l->todo)) |
| 233 | up(&l->sem); |
| 234 | break; |
| 235 | default: |
| 236 | printk ("PLOGI failed for %s with status %d\n", fc->name, status); |
| 237 | /* Do some sort of error recovery here */ |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | static void fcp_report_map_done(fc_channel *fc, int i, int status) |
| 244 | { |
| 245 | fcp_cmnd *fcmd; |
| 246 | fc_hdr *fch; |
| 247 | unsigned char j; |
| 248 | ls *l = (ls *)fc->ls; |
| 249 | fc_al_posmap *p; |
| 250 | |
| 251 | FCD(("Report map done %d %d\n", i, status)) |
| 252 | switch (status) { |
| 253 | case FC_STATUS_OK: /* Ok, let's have a fun on a loop */ |
| 254 | dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), |
| 255 | DMA_BIDIRECTIONAL); |
| 256 | p = (fc_al_posmap *)(l->logi + 3 * i); |
| 257 | #ifdef FCDEBUG |
| 258 | { |
| 259 | u32 *u = (u32 *)p; |
| 260 | FCD(("%08x\n", u[0])) |
| 261 | u ++; |
| 262 | FCD(("%08x.%08x.%08x.%08x.%08x.%08x.%08x.%08x\n", u[0],u[1],u[2],u[3],u[4],u[5],u[6],u[7])) |
| 263 | } |
| 264 | #endif |
| 265 | if ((p->magic & 0xffff0000) != FC_AL_LILP || !p->len) { |
| 266 | printk ("FC: Bad magic from REPORT_AL_MAP on %s - %08x\n", fc->name, p->magic); |
| 267 | fc->state = FC_STATE_OFFLINE; |
| 268 | } else { |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame^] | 269 | fc->posmap = kzalloc(sizeof(fcp_posmap)+p->len, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | if (!fc->posmap) { |
| 271 | printk("FC: Not enough memory, offlining channel\n"); |
| 272 | fc->state = FC_STATE_OFFLINE; |
| 273 | } else { |
| 274 | int k; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* FIXME: This is where SOCAL transfers our AL-PA. |
| 276 | Keep it here till we found out what other cards do... */ |
| 277 | fc->sid = (p->magic & 0xff); |
| 278 | for (i = 0; i < p->len; i++) |
| 279 | if (p->alpa[i] == fc->sid) |
| 280 | break; |
| 281 | k = p->len; |
| 282 | if (i == p->len) |
| 283 | i = 0; |
| 284 | else { |
| 285 | p->len--; |
| 286 | i++; |
| 287 | } |
| 288 | fc->posmap->len = p->len; |
| 289 | for (j = 0; j < p->len; j++) { |
| 290 | if (i == k) i = 0; |
| 291 | fc->posmap->list[j] = p->alpa[i++]; |
| 292 | } |
| 293 | fc->state = FC_STATE_ONLINE; |
| 294 | } |
| 295 | } |
| 296 | printk ("%s: ONLINE\n", fc->name); |
| 297 | if (atomic_dec_and_test (&l->todo)) |
| 298 | up(&l->sem); |
| 299 | break; |
| 300 | case FC_STATUS_POINTTOPOINT: /* We're Point-to-Point, no AL... */ |
| 301 | FCD(("SID %d DID %d\n", fc->sid, fc->did)) |
| 302 | fcmd = l->fcmds + i; |
| 303 | dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), |
| 304 | DMA_BIDIRECTIONAL); |
| 305 | fch = &fcmd->fch; |
| 306 | memset(l->logi + 3 * i, 0, 3 * sizeof(logi)); |
| 307 | FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT); |
| 308 | FILL_FCHDR_SID(fch, 0); |
| 309 | FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); |
| 310 | FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); |
| 311 | FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); |
| 312 | fch->param = 0; |
| 313 | l->logi [3 * i].code = LS_FLOGI; |
| 314 | fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), |
| 315 | DMA_BIDIRECTIONAL); |
| 316 | fcmd->rsp = fcmd->cmd + sizeof(logi); |
| 317 | fcmd->cmdlen = sizeof(logi); |
| 318 | fcmd->rsplen = sizeof(logi); |
| 319 | fcmd->data = (dma_addr_t)NULL; |
| 320 | fcmd->class = FC_CLASS_SIMPLE; |
| 321 | fcmd->proto = TYPE_EXTENDED_LS; |
| 322 | if (fc->hw_enque (fc, fcmd)) |
| 323 | printk ("FC: Cannot enque FLOGI packet on %s\n", fc->name); |
| 324 | break; |
| 325 | case FC_STATUS_ERR_OFFLINE: |
| 326 | fc->state = FC_STATE_MAYBEOFFLINE; |
| 327 | FCD (("FC is offline %d\n", l->grace[i])) |
| 328 | break; |
| 329 | default: |
| 330 | printk ("FLOGI failed for %s with status %d\n", fc->name, status); |
| 331 | /* Do some sort of error recovery here */ |
| 332 | break; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | void fcp_register(fc_channel *fc, u8 type, int unregister) |
| 337 | { |
| 338 | int size, i; |
| 339 | int slots = (fc->can_queue * 3) >> 1; |
| 340 | |
| 341 | FCND(("Going to %sregister\n", unregister ? "un" : "")) |
| 342 | |
| 343 | if (type == TYPE_SCSI_FCP) { |
| 344 | if (!unregister) { |
| 345 | fc->scsi_cmd_pool = (fcp_cmd *) |
| 346 | dma_alloc_consistent (fc->dev, |
| 347 | slots * (sizeof (fcp_cmd) + fc->rsp_size), |
| 348 | &fc->dma_scsi_cmd); |
| 349 | fc->scsi_rsp_pool = (char *)(fc->scsi_cmd_pool + slots); |
| 350 | fc->dma_scsi_rsp = fc->dma_scsi_cmd + slots * sizeof (fcp_cmd); |
| 351 | fc->scsi_bitmap_end = (slots + 63) & ~63; |
| 352 | size = fc->scsi_bitmap_end / 8; |
Deepak Saxena | 49d0c60 | 2005-11-07 01:01:24 -0800 | [diff] [blame] | 353 | fc->scsi_bitmap = kzalloc (size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | set_bit (0, fc->scsi_bitmap); |
| 355 | for (i = fc->can_queue; i < fc->scsi_bitmap_end; i++) |
| 356 | set_bit (i, fc->scsi_bitmap); |
| 357 | fc->scsi_free = fc->can_queue; |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame^] | 358 | fc->cmd_slots = kzalloc(slots * sizeof(fcp_cmnd*), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | fc->abort_count = 0; |
| 360 | } else { |
| 361 | fc->scsi_name[0] = 0; |
| 362 | kfree (fc->scsi_bitmap); |
| 363 | kfree (fc->cmd_slots); |
| 364 | FCND(("Unregistering\n")); |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 365 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | if (fc->rst_pkt) { |
| 367 | if (fc->rst_pkt->eh_state == SCSI_STATE_UNUSED) |
| 368 | kfree(fc->rst_pkt); |
| 369 | else { |
| 370 | /* Can't happen. Some memory would be lost. */ |
| 371 | printk("FC: Reset in progress. Now?!"); |
| 372 | } |
| 373 | } |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 374 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | FCND(("Unregistered\n")); |
| 376 | } |
| 377 | } else |
| 378 | printk ("FC: %segistering unknown type %02x\n", unregister ? "Unr" : "R", type); |
| 379 | } |
| 380 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 381 | static void fcp_scsi_done(struct scsi_cmnd *SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | static inline void fcp_scsi_receive(fc_channel *fc, int token, int status, fc_hdr *fch) |
| 384 | { |
| 385 | fcp_cmnd *fcmd; |
| 386 | fcp_rsp *rsp; |
| 387 | int host_status; |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 388 | struct scsi_cmnd *SCpnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | int sense_len; |
| 390 | int rsp_status; |
| 391 | |
| 392 | fcmd = fc->cmd_slots[token]; |
| 393 | if (!fcmd) return; |
| 394 | rsp = (fcp_rsp *) (fc->scsi_rsp_pool + fc->rsp_size * token); |
| 395 | SCpnt = SC_FCMND(fcmd); |
| 396 | |
| 397 | if (SCpnt->done != fcp_scsi_done) |
| 398 | return; |
| 399 | |
| 400 | rsp_status = rsp->fcp_status; |
| 401 | FCD(("rsp_status %08x status %08x\n", rsp_status, status)) |
| 402 | switch (status) { |
| 403 | case FC_STATUS_OK: |
| 404 | host_status=DID_OK; |
| 405 | |
| 406 | if (rsp_status & FCP_STATUS_RESID) { |
| 407 | #ifdef FCDEBUG |
| 408 | FCD(("Resid %d\n", rsp->fcp_resid)) |
| 409 | { |
| 410 | fcp_cmd *cmd = fc->scsi_cmd_pool + token; |
| 411 | int i; |
| 412 | |
| 413 | printk ("Command "); |
| 414 | for (i = 0; i < sizeof(fcp_cmd); i+=4) |
| 415 | printk ("%08x ", *(u32 *)(((char *)cmd)+i)); |
| 416 | printk ("\nResponse "); |
| 417 | for (i = 0; i < fc->rsp_size; i+=4) |
| 418 | printk ("%08x ", *(u32 *)(((char *)rsp)+i)); |
| 419 | printk ("\n"); |
| 420 | } |
| 421 | #endif |
| 422 | } |
| 423 | |
| 424 | if (rsp_status & FCP_STATUS_SENSE_LEN) { |
| 425 | sense_len = rsp->fcp_sense_len; |
| 426 | if (sense_len > sizeof(SCpnt->sense_buffer)) sense_len = sizeof(SCpnt->sense_buffer); |
| 427 | memcpy(SCpnt->sense_buffer, ((char *)(rsp+1)), sense_len); |
| 428 | } |
| 429 | |
| 430 | if (fcmd->data) { |
| 431 | if (SCpnt->use_sg) |
Christoph Hellwig | 79bd3f8 | 2006-07-14 10:29:34 +0200 | [diff] [blame] | 432 | dma_unmap_sg(fc->dev, (struct scatterlist *)SCpnt->request_buffer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | SCpnt->use_sg, |
| 434 | SCpnt->sc_data_direction); |
| 435 | else |
| 436 | dma_unmap_single(fc->dev, fcmd->data, SCpnt->request_bufflen, |
| 437 | SCpnt->sc_data_direction); |
| 438 | } |
| 439 | break; |
| 440 | default: |
| 441 | host_status=DID_ERROR; /* FIXME */ |
| 442 | FCD(("Wrong FC status %d for token %d\n", status, token)) |
| 443 | break; |
| 444 | } |
| 445 | |
| 446 | if (status_byte(rsp_status) == QUEUE_FULL) { |
| 447 | printk ("%s: (%d,%d) Received rsp_status 0x%x\n", fc->name, SCpnt->device->channel, SCpnt->device->id, rsp_status); |
| 448 | } |
| 449 | |
| 450 | SCpnt->result = (host_status << 16) | (rsp_status & 0xff); |
| 451 | #ifdef FCDEBUG |
| 452 | if (host_status || SCpnt->result || rsp_status) printk("FC: host_status %d, packet status %d\n", |
| 453 | host_status, SCpnt->result); |
| 454 | #endif |
| 455 | SCpnt->done = fcmd->done; |
| 456 | fcmd->done=NULL; |
| 457 | clear_bit(token, fc->scsi_bitmap); |
| 458 | fc->scsi_free++; |
| 459 | FCD(("Calling scsi_done with %08x\n", SCpnt->result)) |
| 460 | SCpnt->scsi_done(SCpnt); |
| 461 | } |
| 462 | |
| 463 | void fcp_receive_solicited(fc_channel *fc, int proto, int token, int status, fc_hdr *fch) |
| 464 | { |
| 465 | int magic; |
| 466 | FCD(("receive_solicited %d %d %d\n", proto, token, status)) |
| 467 | switch (proto) { |
| 468 | case TYPE_SCSI_FCP: |
| 469 | fcp_scsi_receive(fc, token, status, fch); break; |
| 470 | case TYPE_EXTENDED_LS: |
| 471 | case PROTO_REPORT_AL_MAP: |
| 472 | magic = 0; |
| 473 | if (fc->ls) |
| 474 | magic = ((ls *)(fc->ls))->magic; |
| 475 | if (magic == LSMAGIC) { |
| 476 | ls *l = (ls *)fc->ls; |
| 477 | int i = (token >= l->count) ? token - l->count : token; |
| 478 | |
| 479 | /* Let's be sure */ |
| 480 | if ((unsigned)i < l->count && l->fcmds[i].fc == fc) { |
| 481 | if (proto == TYPE_EXTENDED_LS) |
| 482 | fcp_login_done(fc, token, status); |
| 483 | else |
| 484 | fcp_report_map_done(fc, token, status); |
| 485 | break; |
| 486 | } |
| 487 | } |
| 488 | FCD(("fc %p fc->ls %p fc->cmd_slots %p\n", fc, fc->ls, fc->cmd_slots)) |
| 489 | if (proto == TYPE_EXTENDED_LS && !fc->ls && fc->cmd_slots) { |
| 490 | fcp_cmnd *fcmd; |
| 491 | |
| 492 | fcmd = fc->cmd_slots[token]; |
| 493 | if (fcmd && fcmd->ls && ((ls *)(fcmd->ls))->magic == LSEMAGIC) { |
| 494 | lse *l = (lse *)fcmd->ls; |
| 495 | |
| 496 | l->status = status; |
| 497 | up (&l->sem); |
| 498 | } |
| 499 | } |
| 500 | break; |
| 501 | case PROTO_OFFLINE: |
| 502 | if (fc->ls && ((lso *)(fc->ls))->magic == LSOMAGIC) { |
| 503 | lso *l = (lso *)fc->ls; |
| 504 | |
| 505 | if ((unsigned)token < l->count && l->fcmds[token].fc == fc) { |
| 506 | /* Wow, OFFLINE response arrived :) */ |
| 507 | FCD(("OFFLINE Response arrived\n")) |
| 508 | fc->state = FC_STATE_OFFLINE; |
| 509 | if (atomic_dec_and_test (&l->todo)) |
| 510 | up(&l->sem); |
| 511 | } |
| 512 | } |
| 513 | break; |
| 514 | |
| 515 | default: |
| 516 | break; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | void fcp_state_change(fc_channel *fc, int state) |
| 521 | { |
| 522 | FCD(("state_change %d %d\n", state, fc->state)) |
| 523 | if (state == FC_STATE_ONLINE && fc->state == FC_STATE_MAYBEOFFLINE) |
| 524 | fc->state = FC_STATE_UNINITED; |
| 525 | else if (state == FC_STATE_ONLINE) |
| 526 | printk (KERN_WARNING "%s: state change to ONLINE\n", fc->name); |
| 527 | else |
| 528 | printk (KERN_ERR "%s: state change to OFFLINE\n", fc->name); |
| 529 | } |
| 530 | |
| 531 | int fcp_initialize(fc_channel *fcchain, int count) |
| 532 | { |
| 533 | fc_channel *fc; |
| 534 | fcp_cmnd *fcmd; |
| 535 | int i, retry, ret; |
| 536 | ls *l; |
| 537 | |
| 538 | FCND(("fcp_inititialize %08lx\n", (long)fcp_init)) |
| 539 | FCND(("fc_channels %08lx\n", (long)fc_channels)) |
| 540 | FCND((" SID %d DID %d\n", fcchain->sid, fcchain->did)) |
Deepak Saxena | 49d0c60 | 2005-11-07 01:01:24 -0800 | [diff] [blame] | 541 | l = kzalloc(sizeof (ls) + count, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | if (!l) { |
| 543 | printk ("FC: Cannot allocate memory for initialization\n"); |
| 544 | return -ENOMEM; |
| 545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | l->magic = LSMAGIC; |
| 547 | l->count = count; |
| 548 | FCND(("FCP Init for %d channels\n", count)) |
| 549 | init_MUTEX_LOCKED(&l->sem); |
| 550 | init_timer(&l->timer); |
| 551 | l->timer.function = fcp_login_timeout; |
| 552 | l->timer.data = (unsigned long)l; |
| 553 | atomic_set (&l->todo, count); |
Deepak Saxena | 49d0c60 | 2005-11-07 01:01:24 -0800 | [diff] [blame] | 554 | l->logi = kzalloc (count * 3 * sizeof(logi), GFP_KERNEL); |
| 555 | l->fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | if (!l->logi || !l->fcmds) { |
Jesper Juhl | 6044ec8 | 2005-11-07 01:01:32 -0800 | [diff] [blame] | 557 | kfree (l->logi); |
| 558 | kfree (l->fcmds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | kfree (l); |
| 560 | printk ("FC: Cannot allocate DMA memory for initialization\n"); |
| 561 | return -ENOMEM; |
| 562 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { |
| 564 | fc->state = FC_STATE_UNINITED; |
| 565 | fc->rst_pkt = NULL; /* kmalloc when first used */ |
| 566 | } |
| 567 | /* First try if we are in a AL topology */ |
| 568 | FCND(("Initializing REPORT_MAP packets\n")) |
| 569 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { |
| 570 | fcmd = l->fcmds + i; |
| 571 | fc->login = fcmd; |
| 572 | fc->ls = (void *)l; |
| 573 | /* Assumes sizeof(fc_al_posmap) < 3 * sizeof(logi), which is true */ |
| 574 | fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), |
| 575 | DMA_BIDIRECTIONAL); |
| 576 | fcmd->proto = PROTO_REPORT_AL_MAP; |
| 577 | fcmd->token = i; |
| 578 | fcmd->fc = fc; |
| 579 | } |
| 580 | for (retry = 0; retry < 8; retry++) { |
| 581 | int nqueued = 0; |
| 582 | FCND(("Sending REPORT_MAP/FLOGI/PLOGI packets\n")) |
| 583 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { |
| 584 | if (fc->state == FC_STATE_ONLINE || fc->state == FC_STATE_OFFLINE) |
| 585 | continue; |
| 586 | disable_irq(fc->irq); |
| 587 | if (fc->state == FC_STATE_MAYBEOFFLINE) { |
| 588 | if (!l->grace[i]) { |
| 589 | l->grace[i]++; |
| 590 | FCD(("Grace\n")) |
| 591 | } else { |
| 592 | fc->state = FC_STATE_OFFLINE; |
| 593 | enable_irq(fc->irq); |
| 594 | dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); |
| 595 | if (atomic_dec_and_test (&l->todo)) |
| 596 | goto all_done; |
| 597 | } |
| 598 | } |
| 599 | ret = fc->hw_enque (fc, fc->login); |
| 600 | enable_irq(fc->irq); |
| 601 | if (!ret) { |
| 602 | nqueued++; |
| 603 | continue; |
| 604 | } |
| 605 | if (ret == -ENOSYS && fc->login->proto == PROTO_REPORT_AL_MAP) { |
| 606 | /* Oh yes, this card handles Point-to-Point only, so let's try that. */ |
| 607 | fc_hdr *fch; |
| 608 | |
| 609 | FCD(("SID %d DID %d\n", fc->sid, fc->did)) |
| 610 | fcmd = l->fcmds + i; |
| 611 | dma_unmap_single(fc->dev, fcmd->cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); |
| 612 | fch = &fcmd->fch; |
| 613 | FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, FS_FABRIC_F_PORT); |
| 614 | FILL_FCHDR_SID(fch, 0); |
| 615 | FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); |
| 616 | FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); |
| 617 | FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); |
| 618 | fch->param = 0; |
| 619 | l->logi [3 * i].code = LS_FLOGI; |
| 620 | fcmd->cmd = dma_map_single (fc->dev, l->logi + 3 * i, 3 * sizeof(logi), DMA_BIDIRECTIONAL); |
| 621 | fcmd->rsp = fcmd->cmd + sizeof(logi); |
| 622 | fcmd->cmdlen = sizeof(logi); |
| 623 | fcmd->rsplen = sizeof(logi); |
| 624 | fcmd->data = (dma_addr_t)NULL; |
| 625 | fcmd->class = FC_CLASS_SIMPLE; |
| 626 | fcmd->proto = TYPE_EXTENDED_LS; |
| 627 | } else |
| 628 | printk ("FC: Cannot enque FLOGI/REPORT_MAP packet on %s\n", fc->name); |
| 629 | } |
| 630 | |
| 631 | if (nqueued) { |
| 632 | l->timer.expires = jiffies + 5 * HZ; |
| 633 | add_timer(&l->timer); |
| 634 | |
| 635 | down(&l->sem); |
| 636 | if (!atomic_read(&l->todo)) { |
| 637 | FCND(("All channels answered in time\n")) |
| 638 | break; /* All fc channels have answered us */ |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | all_done: |
| 643 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { |
| 644 | fc->ls = NULL; |
| 645 | switch (fc->state) { |
| 646 | case FC_STATE_ONLINE: break; |
| 647 | case FC_STATE_OFFLINE: break; |
| 648 | default: dma_unmap_single (fc->dev, l->fcmds[i].cmd, 3 * sizeof(logi), DMA_BIDIRECTIONAL); |
| 649 | break; |
| 650 | } |
| 651 | } |
| 652 | del_timer(&l->timer); |
| 653 | kfree (l->logi); |
| 654 | kfree (l->fcmds); |
| 655 | kfree (l); |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | int fcp_forceoffline(fc_channel *fcchain, int count) |
| 660 | { |
| 661 | fc_channel *fc; |
| 662 | fcp_cmnd *fcmd; |
| 663 | int i, ret; |
| 664 | lso l; |
| 665 | |
| 666 | memset (&l, 0, sizeof(lso)); |
| 667 | l.count = count; |
| 668 | l.magic = LSOMAGIC; |
| 669 | FCND(("FCP Force Offline for %d channels\n", count)) |
| 670 | init_MUTEX_LOCKED(&l.sem); |
| 671 | init_timer(&l.timer); |
| 672 | l.timer.function = fcp_login_timeout; |
| 673 | l.timer.data = (unsigned long)&l; |
| 674 | atomic_set (&l.todo, count); |
Deepak Saxena | 49d0c60 | 2005-11-07 01:01:24 -0800 | [diff] [blame] | 675 | l.fcmds = kzalloc (count * sizeof(fcp_cmnd), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | if (!l.fcmds) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | printk ("FC: Cannot allocate memory for forcing offline\n"); |
| 678 | return -ENOMEM; |
| 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | FCND(("Initializing OFFLINE packets\n")) |
| 681 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) { |
| 682 | fc->state = FC_STATE_UNINITED; |
| 683 | fcmd = l.fcmds + i; |
| 684 | fc->login = fcmd; |
| 685 | fc->ls = (void *)&l; |
| 686 | fcmd->did = fc->did; |
| 687 | fcmd->class = FC_CLASS_OFFLINE; |
| 688 | fcmd->proto = PROTO_OFFLINE; |
| 689 | fcmd->token = i; |
| 690 | fcmd->fc = fc; |
| 691 | disable_irq(fc->irq); |
| 692 | ret = fc->hw_enque (fc, fc->login); |
| 693 | enable_irq(fc->irq); |
| 694 | if (ret) printk ("FC: Cannot enque OFFLINE packet on %s\n", fc->name); |
| 695 | } |
| 696 | |
| 697 | l.timer.expires = jiffies + 5 * HZ; |
| 698 | add_timer(&l.timer); |
| 699 | down(&l.sem); |
| 700 | del_timer(&l.timer); |
| 701 | |
| 702 | for (fc = fcchain, i = 0; fc && i < count; fc = fc->next, i++) |
| 703 | fc->ls = NULL; |
| 704 | kfree (l.fcmds); |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | int fcp_init(fc_channel *fcchain) |
| 709 | { |
| 710 | fc_channel *fc; |
| 711 | int count=0; |
| 712 | int ret; |
| 713 | |
| 714 | for (fc = fcchain; fc; fc = fc->next) { |
| 715 | fc->fcp_register = fcp_register; |
| 716 | count++; |
| 717 | } |
| 718 | |
| 719 | ret = fcp_initialize (fcchain, count); |
| 720 | if (ret) |
| 721 | return ret; |
| 722 | |
| 723 | if (!fc_channels) |
| 724 | fc_channels = fcchain; |
| 725 | else { |
| 726 | for (fc = fc_channels; fc->next; fc = fc->next); |
| 727 | fc->next = fcchain; |
| 728 | } |
| 729 | return ret; |
| 730 | } |
| 731 | |
| 732 | void fcp_release(fc_channel *fcchain, int count) /* count must > 0 */ |
| 733 | { |
| 734 | fc_channel *fc; |
| 735 | fc_channel *fcx; |
| 736 | |
| 737 | for (fc = fcchain; --count && fc->next; fc = fc->next); |
| 738 | if (count) { |
| 739 | printk("FC: nothing to release\n"); |
| 740 | return; |
| 741 | } |
| 742 | |
| 743 | if (fc_channels == fcchain) |
| 744 | fc_channels = fc->next; |
| 745 | else { |
| 746 | for (fcx = fc_channels; fcx->next != fcchain; fcx = fcx->next); |
| 747 | fcx->next = fc->next; |
| 748 | } |
| 749 | fc->next = NULL; |
| 750 | |
| 751 | /* |
| 752 | * We've just grabbed fcchain out of the fc_channel list |
| 753 | * and zero-terminated it, while destroying the count. |
| 754 | * |
| 755 | * Freeing the fc's is the low level driver's responsibility. |
| 756 | */ |
| 757 | } |
| 758 | |
| 759 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 760 | static void fcp_scsi_done(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | if (FCP_CMND(SCpnt)->done) |
| 763 | FCP_CMND(SCpnt)->done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 766 | static int fcp_scsi_queue_it(fc_channel *fc, struct scsi_cmnd *SCpnt, |
| 767 | fcp_cmnd *fcmd, int prepare) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
| 769 | long i; |
| 770 | fcp_cmd *cmd; |
| 771 | u32 fcp_cntl; |
| 772 | if (prepare) { |
| 773 | i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end); |
| 774 | set_bit (i, fc->scsi_bitmap); |
| 775 | fcmd->token = i; |
| 776 | cmd = fc->scsi_cmd_pool + i; |
| 777 | |
| 778 | if (fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd)) { |
| 779 | /* Invalid channel/id/lun and couldn't map it into fcp_addr */ |
| 780 | clear_bit (i, fc->scsi_bitmap); |
| 781 | SCpnt->result = (DID_BAD_TARGET << 16); |
| 782 | SCpnt->scsi_done(SCpnt); |
| 783 | return 0; |
| 784 | } |
| 785 | fc->scsi_free--; |
| 786 | fc->cmd_slots[fcmd->token] = fcmd; |
| 787 | |
| 788 | if (SCpnt->device->tagged_supported) { |
| 789 | if (jiffies - fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] > (5 * 60 * HZ)) { |
| 790 | fc->ages[SCpnt->device->channel * fc->targets + SCpnt->device->id] = jiffies; |
| 791 | fcp_cntl = FCP_CNTL_QTYPE_ORDERED; |
| 792 | } else |
| 793 | fcp_cntl = FCP_CNTL_QTYPE_SIMPLE; |
| 794 | } else |
| 795 | fcp_cntl = FCP_CNTL_QTYPE_UNTAGGED; |
| 796 | if (!SCpnt->request_bufflen && !SCpnt->use_sg) { |
| 797 | cmd->fcp_cntl = fcp_cntl; |
| 798 | fcmd->data = (dma_addr_t)NULL; |
| 799 | } else { |
| 800 | switch (SCpnt->cmnd[0]) { |
| 801 | case WRITE_6: |
| 802 | case WRITE_10: |
| 803 | case WRITE_12: |
| 804 | cmd->fcp_cntl = (FCP_CNTL_WRITE | fcp_cntl); break; |
| 805 | default: |
| 806 | cmd->fcp_cntl = (FCP_CNTL_READ | fcp_cntl); break; |
| 807 | } |
| 808 | if (!SCpnt->use_sg) { |
| 809 | cmd->fcp_data_len = SCpnt->request_bufflen; |
| 810 | fcmd->data = dma_map_single (fc->dev, (char *)SCpnt->request_buffer, |
| 811 | SCpnt->request_bufflen, |
| 812 | SCpnt->sc_data_direction); |
| 813 | } else { |
Christoph Hellwig | 79bd3f8 | 2006-07-14 10:29:34 +0200 | [diff] [blame] | 814 | struct scatterlist *sg = (struct scatterlist *)SCpnt->request_buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | int nents; |
| 816 | |
| 817 | FCD(("XXX: Use_sg %d %d\n", SCpnt->use_sg, sg->length)) |
| 818 | nents = dma_map_sg (fc->dev, sg, SCpnt->use_sg, |
| 819 | SCpnt->sc_data_direction); |
| 820 | if (nents > 1) printk ("%s: SG for nents %d (use_sg %d) not handled yet\n", fc->name, nents, SCpnt->use_sg); |
| 821 | fcmd->data = sg_dma_address(sg); |
| 822 | cmd->fcp_data_len = sg_dma_len(sg); |
| 823 | } |
| 824 | } |
| 825 | memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len); |
| 826 | memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len); |
| 827 | FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8))) |
| 828 | } |
| 829 | FCD(("Trying to enque %p\n", fcmd)) |
| 830 | if (!fc->scsi_que) { |
| 831 | if (!fc->hw_enque (fc, fcmd)) { |
| 832 | FCD(("hw_enque succeeded for %p\n", fcmd)) |
| 833 | return 0; |
| 834 | } |
| 835 | } |
| 836 | FCD(("Putting into que1 %p\n", fcmd)) |
| 837 | fcp_scsi_insert_queue (fc, fcmd); |
| 838 | return 0; |
| 839 | } |
| 840 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 841 | int fcp_scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| 842 | void (* done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | { |
| 844 | fcp_cmnd *fcmd = FCP_CMND(SCpnt); |
| 845 | fc_channel *fc = FC_SCMND(SCpnt); |
| 846 | |
| 847 | FCD(("Entering SCSI queuecommand %p\n", fcmd)) |
| 848 | if (SCpnt->done != fcp_scsi_done) { |
| 849 | fcmd->done = SCpnt->done; |
| 850 | SCpnt->done = fcp_scsi_done; |
| 851 | SCpnt->scsi_done = done; |
| 852 | fcmd->proto = TYPE_SCSI_FCP; |
| 853 | if (!fc->scsi_free) { |
| 854 | FCD(("FC: !scsi_free, putting cmd on ML queue\n")) |
| 855 | #if (FCP_SCSI_USE_NEW_EH_CODE == 0) |
| 856 | printk("fcp_scsi_queue_command: queue full, losing cmd, bad\n"); |
| 857 | #endif |
| 858 | return 1; |
| 859 | } |
| 860 | return fcp_scsi_queue_it(fc, SCpnt, fcmd, 1); |
| 861 | } |
| 862 | return fcp_scsi_queue_it(fc, SCpnt, fcmd, 0); |
| 863 | } |
| 864 | |
| 865 | void fcp_queue_empty(fc_channel *fc) |
| 866 | { |
| 867 | fcp_cmnd *fcmd; |
| 868 | |
| 869 | FCD(("Queue empty\n")) |
| 870 | while ((fcmd = fc->scsi_que)) { |
| 871 | /* The hw told us we can try again queue some packet */ |
| 872 | if (fc->hw_enque (fc, fcmd)) |
| 873 | break; |
| 874 | fcp_scsi_remove_queue (fc, fcmd); |
| 875 | } |
| 876 | } |
| 877 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 878 | int fcp_scsi_abort(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
| 880 | /* Internal bookkeeping only. Lose 1 cmd_slots slot. */ |
| 881 | fcp_cmnd *fcmd = FCP_CMND(SCpnt); |
| 882 | fc_channel *fc = FC_SCMND(SCpnt); |
| 883 | |
| 884 | /* |
| 885 | * We react to abort requests by simply forgetting |
| 886 | * about the command and pretending everything's sweet. |
| 887 | * This may or may not be silly. We can't, however, |
| 888 | * immediately reuse the command's cmd_slots slot, |
| 889 | * as its result may arrive later and we cannot |
| 890 | * check whether it is the aborted one, can't we? |
| 891 | * |
| 892 | * Therefore, after the first few aborts are done, |
| 893 | * we tell the scsi error handler to do something clever. |
| 894 | * It will eventually call host reset, refreshing |
| 895 | * cmd_slots for us. |
| 896 | * |
| 897 | * There is a theoretical chance that we sometimes allow |
| 898 | * more than can_queue packets to the jungle this way, |
| 899 | * but the worst outcome possible is a series of |
| 900 | * more aborts and eventually the dev_reset catharsis. |
| 901 | */ |
| 902 | |
| 903 | if (++fc->abort_count < (fc->can_queue >> 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | SCpnt->result = DID_ABORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | fcmd->done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | printk("FC: soft abort\n"); |
| 907 | return SUCCESS; |
| 908 | } else { |
| 909 | printk("FC: hard abort refused\n"); |
| 910 | return FAILED; |
| 911 | } |
| 912 | } |
| 913 | |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 914 | #if 0 |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 915 | void fcp_scsi_reset_done(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
| 917 | fc_channel *fc = FC_SCMND(SCpnt); |
| 918 | |
| 919 | fc->rst_pkt->eh_state = SCSI_STATE_FINISHED; |
| 920 | up(fc->rst_pkt->device->host->eh_action); |
| 921 | } |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 922 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | |
| 924 | #define FCP_RESET_TIMEOUT (2*HZ) |
| 925 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 926 | int fcp_scsi_dev_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | { |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 928 | #if 0 /* broken junk, but if davem wants to compile this driver, let him.. */ |
Jeff Garzik | 98f72a1 | 2005-06-19 21:47:56 -0400 | [diff] [blame] | 929 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | fcp_cmd *cmd; |
| 931 | fcp_cmnd *fcmd; |
| 932 | fc_channel *fc = FC_SCMND(SCpnt); |
| 933 | DECLARE_MUTEX_LOCKED(sem); |
| 934 | |
| 935 | if (!fc->rst_pkt) { |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame^] | 936 | fc->rst_pkt = kmalloc(sizeof(SCpnt), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (!fc->rst_pkt) return FAILED; |
| 938 | |
| 939 | fcmd = FCP_CMND(fc->rst_pkt); |
| 940 | |
| 941 | |
| 942 | fcmd->token = 0; |
| 943 | cmd = fc->scsi_cmd_pool + 0; |
| 944 | FCD(("Preparing rst packet\n")) |
| 945 | fc->encode_addr (SCpnt, cmd->fcp_addr, fc, fcmd); |
| 946 | fc->rst_pkt->device = SCpnt->device; |
| 947 | fc->rst_pkt->cmd_len = 0; |
| 948 | |
| 949 | fc->cmd_slots[0] = fcmd; |
| 950 | |
| 951 | cmd->fcp_cntl = FCP_CNTL_QTYPE_ORDERED | FCP_CNTL_RESET; |
| 952 | fcmd->data = (dma_addr_t)NULL; |
| 953 | fcmd->proto = TYPE_SCSI_FCP; |
| 954 | |
| 955 | memcpy (cmd->fcp_cdb, SCpnt->cmnd, SCpnt->cmd_len); |
| 956 | memset (cmd->fcp_cdb+SCpnt->cmd_len, 0, sizeof(cmd->fcp_cdb)-SCpnt->cmd_len); |
| 957 | FCD(("XXX: %04x.%04x.%04x.%04x - %08x%08x%08x\n", cmd->fcp_addr[0], cmd->fcp_addr[1], cmd->fcp_addr[2], cmd->fcp_addr[3], *(u32 *)SCpnt->cmnd, *(u32 *)(SCpnt->cmnd+4), *(u32 *)(SCpnt->cmnd+8))) |
| 958 | } else { |
| 959 | fcmd = FCP_CMND(fc->rst_pkt); |
| 960 | if (fc->rst_pkt->eh_state == SCSI_STATE_QUEUED) |
| 961 | return FAILED; /* or SUCCESS. Only these */ |
| 962 | } |
| 963 | fc->rst_pkt->done = NULL; |
| 964 | |
| 965 | |
| 966 | fc->rst_pkt->eh_state = SCSI_STATE_QUEUED; |
| 967 | init_timer(&fc->rst_pkt->eh_timeout); |
| 968 | fc->rst_pkt->eh_timeout.data = (unsigned long) fc->rst_pkt; |
| 969 | fc->rst_pkt->eh_timeout.expires = jiffies + FCP_RESET_TIMEOUT; |
| 970 | fc->rst_pkt->eh_timeout.function = (void (*)(unsigned long))fcp_scsi_reset_done; |
| 971 | |
| 972 | add_timer(&fc->rst_pkt->eh_timeout); |
| 973 | |
| 974 | /* |
| 975 | * Set up the semaphore so we wait for the command to complete. |
| 976 | */ |
| 977 | |
| 978 | fc->rst_pkt->device->host->eh_action = &sem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | |
| 980 | fc->rst_pkt->done = fcp_scsi_reset_done; |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 981 | |
| 982 | spin_lock_irqsave(SCpnt->device->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | fcp_scsi_queue_it(fc, fc->rst_pkt, fcmd, 0); |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 984 | spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
| 986 | down(&sem); |
| 987 | |
| 988 | fc->rst_pkt->device->host->eh_action = NULL; |
| 989 | del_timer(&fc->rst_pkt->eh_timeout); |
| 990 | |
| 991 | /* |
| 992 | * See if timeout. If so, tell the host to forget about it. |
| 993 | * In other words, we don't want a callback any more. |
| 994 | */ |
| 995 | if (fc->rst_pkt->eh_state == SCSI_STATE_TIMEOUT ) { |
| 996 | fc->rst_pkt->eh_state = SCSI_STATE_UNUSED; |
| 997 | return FAILED; |
| 998 | } |
| 999 | fc->rst_pkt->eh_state = SCSI_STATE_UNUSED; |
Christoph Hellwig | fc2b035 | 2005-06-27 22:43:06 +0200 | [diff] [blame] | 1000 | #endif |
Andrew Morton | e572f7c | 2005-07-27 01:07:43 -0700 | [diff] [blame] | 1001 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 1004 | static int __fcp_scsi_host_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | { |
| 1006 | fc_channel *fc = FC_SCMND(SCpnt); |
| 1007 | fcp_cmnd *fcmd = FCP_CMND(SCpnt); |
| 1008 | int i; |
| 1009 | |
| 1010 | printk ("FC: host reset\n"); |
| 1011 | |
| 1012 | for (i=0; i < fc->can_queue; i++) { |
| 1013 | if (fc->cmd_slots[i] && SCpnt->result != DID_ABORT) { |
| 1014 | SCpnt->result = DID_RESET; |
| 1015 | fcmd->done(SCpnt); |
| 1016 | fc->cmd_slots[i] = NULL; |
| 1017 | } |
| 1018 | } |
| 1019 | fc->reset(fc); |
| 1020 | fc->abort_count = 0; |
| 1021 | if (fcp_initialize(fc, 1)) return SUCCESS; |
| 1022 | else return FAILED; |
| 1023 | } |
| 1024 | |
Henrik Kretzschmar | 9531c33 | 2006-10-10 14:41:42 -0700 | [diff] [blame] | 1025 | int fcp_scsi_host_reset(struct scsi_cmnd *SCpnt) |
Jeff Garzik | df0ae24 | 2005-05-28 07:57:14 -0400 | [diff] [blame] | 1026 | { |
Jeff Garzik | 98f72a1 | 2005-06-19 21:47:56 -0400 | [diff] [blame] | 1027 | unsigned long flags; |
Jeff Garzik | df0ae24 | 2005-05-28 07:57:14 -0400 | [diff] [blame] | 1028 | int rc; |
| 1029 | |
| 1030 | spin_lock_irqsave(SCpnt->device->host->host_lock, flags); |
| 1031 | rc = __fcp_scsi_host_reset(SCpnt); |
| 1032 | spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); |
| 1033 | |
| 1034 | return rc; |
| 1035 | } |
| 1036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | static int fcp_els_queue_it(fc_channel *fc, fcp_cmnd *fcmd) |
| 1038 | { |
| 1039 | long i; |
| 1040 | |
| 1041 | i = find_first_zero_bit (fc->scsi_bitmap, fc->scsi_bitmap_end); |
| 1042 | set_bit (i, fc->scsi_bitmap); |
| 1043 | fcmd->token = i; |
| 1044 | fc->scsi_free--; |
| 1045 | fc->cmd_slots[fcmd->token] = fcmd; |
| 1046 | return fcp_scsi_queue_it(fc, NULL, fcmd, 0); |
| 1047 | } |
| 1048 | |
| 1049 | static int fc_do_els(fc_channel *fc, unsigned int alpa, void *data, int len) |
| 1050 | { |
| 1051 | fcp_cmnd _fcmd, *fcmd; |
| 1052 | fc_hdr *fch; |
| 1053 | lse l; |
| 1054 | int i; |
| 1055 | |
| 1056 | fcmd = &_fcmd; |
Alexey Dobriyan | ec33b5f | 2006-02-20 18:28:10 -0800 | [diff] [blame] | 1057 | memset(fcmd, 0, sizeof(fcp_cmnd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | FCD(("PLOGI SID %d DID %d\n", fc->sid, alpa)) |
| 1059 | fch = &fcmd->fch; |
| 1060 | FILL_FCHDR_RCTL_DID(fch, R_CTL_ELS_REQ, alpa); |
| 1061 | FILL_FCHDR_SID(fch, fc->sid); |
| 1062 | FILL_FCHDR_TYPE_FCTL(fch, TYPE_EXTENDED_LS, F_CTL_FIRST_SEQ | F_CTL_SEQ_INITIATIVE); |
| 1063 | FILL_FCHDR_SEQ_DF_SEQ(fch, 0, 0, 0); |
| 1064 | FILL_FCHDR_OXRX(fch, 0xffff, 0xffff); |
| 1065 | fch->param = 0; |
| 1066 | fcmd->cmd = dma_map_single (fc->dev, data, 2 * len, DMA_BIDIRECTIONAL); |
| 1067 | fcmd->rsp = fcmd->cmd + len; |
| 1068 | fcmd->cmdlen = len; |
| 1069 | fcmd->rsplen = len; |
| 1070 | fcmd->data = (dma_addr_t)NULL; |
| 1071 | fcmd->fc = fc; |
| 1072 | fcmd->class = FC_CLASS_SIMPLE; |
| 1073 | fcmd->proto = TYPE_EXTENDED_LS; |
| 1074 | |
| 1075 | memset (&l, 0, sizeof(lse)); |
| 1076 | l.magic = LSEMAGIC; |
| 1077 | init_MUTEX_LOCKED(&l.sem); |
| 1078 | l.timer.function = fcp_login_timeout; |
| 1079 | l.timer.data = (unsigned long)&l; |
| 1080 | l.status = FC_STATUS_TIMED_OUT; |
| 1081 | fcmd->ls = (void *)&l; |
| 1082 | |
| 1083 | disable_irq(fc->irq); |
| 1084 | fcp_els_queue_it(fc, fcmd); |
| 1085 | enable_irq(fc->irq); |
| 1086 | |
| 1087 | for (i = 0;;) { |
| 1088 | l.timer.expires = jiffies + 5 * HZ; |
| 1089 | add_timer(&l.timer); |
| 1090 | down(&l.sem); |
| 1091 | del_timer(&l.timer); |
| 1092 | if (l.status != FC_STATUS_TIMED_OUT) break; |
| 1093 | if (++i == 3) break; |
| 1094 | disable_irq(fc->irq); |
| 1095 | fcp_scsi_queue_it(fc, NULL, fcmd, 0); |
| 1096 | enable_irq(fc->irq); |
| 1097 | } |
| 1098 | |
| 1099 | clear_bit(fcmd->token, fc->scsi_bitmap); |
| 1100 | fc->scsi_free++; |
| 1101 | dma_unmap_single (fc->dev, fcmd->cmd, 2 * len, DMA_BIDIRECTIONAL); |
| 1102 | return l.status; |
| 1103 | } |
| 1104 | |
| 1105 | int fc_do_plogi(fc_channel *fc, unsigned char alpa, fc_wwn *node, fc_wwn *nport) |
| 1106 | { |
| 1107 | logi *l; |
| 1108 | int status; |
| 1109 | |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame^] | 1110 | l = kzalloc(2 * sizeof(logi), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (!l) return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | l->code = LS_PLOGI; |
| 1113 | memcpy (&l->nport_wwn, &fc->wwn_nport, sizeof(fc_wwn)); |
| 1114 | memcpy (&l->node_wwn, &fc->wwn_node, sizeof(fc_wwn)); |
| 1115 | memcpy (&l->common, fc->common_svc, sizeof(common_svc_parm)); |
| 1116 | memcpy (&l->class1, fc->class_svcs, 3*sizeof(svc_parm)); |
| 1117 | status = fc_do_els(fc, alpa, l, sizeof(logi)); |
| 1118 | if (status == FC_STATUS_OK) { |
| 1119 | if (l[1].code == LS_ACC) { |
| 1120 | #ifdef FCDEBUG |
| 1121 | u32 *u = (u32 *)&l[1].nport_wwn; |
| 1122 | FCD(("AL-PA %02x: Port WWN %08x%08x Node WWN %08x%08x\n", alpa, |
| 1123 | u[0], u[1], u[2], u[3])) |
| 1124 | #endif |
| 1125 | memcpy(nport, &l[1].nport_wwn, sizeof(fc_wwn)); |
| 1126 | memcpy(node, &l[1].node_wwn, sizeof(fc_wwn)); |
| 1127 | } else |
| 1128 | status = FC_STATUS_BAD_RSP; |
| 1129 | } |
| 1130 | kfree(l); |
| 1131 | return status; |
| 1132 | } |
| 1133 | |
| 1134 | typedef struct { |
| 1135 | unsigned int code; |
| 1136 | unsigned params[4]; |
| 1137 | } prli; |
| 1138 | |
| 1139 | int fc_do_prli(fc_channel *fc, unsigned char alpa) |
| 1140 | { |
| 1141 | prli *p; |
| 1142 | int status; |
| 1143 | |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame^] | 1144 | p = kzalloc(2 * sizeof(prli), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | if (!p) return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | p->code = LS_PRLI; |
| 1147 | p->params[0] = 0x08002000; |
| 1148 | p->params[3] = 0x00000022; |
| 1149 | status = fc_do_els(fc, alpa, p, sizeof(prli)); |
| 1150 | if (status == FC_STATUS_OK && p[1].code != LS_PRLI_ACC && p[1].code != LS_ACC) |
| 1151 | status = FC_STATUS_BAD_RSP; |
| 1152 | kfree(p); |
| 1153 | return status; |
| 1154 | } |
| 1155 | |
| 1156 | MODULE_LICENSE("GPL"); |
| 1157 | |