Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Copyright(c) 2000, Compaq Computer Corporation |
| 2 | * Fibre Channel Host Bus Adapter |
| 3 | * 64-bit, 66MHz PCI |
| 4 | * Originally developed and tested on: |
| 5 | * (front): [chip] Tachyon TS HPFC-5166A/1.2 L2C1090 ... |
| 6 | * SP# P225CXCBFIEL6T, Rev XC |
| 7 | * SP# 161290-001, Rev XD |
| 8 | * (back): Board No. 010008-001 A/W Rev X5, FAB REV X5 |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2, or (at your option) any |
| 13 | * later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * Written by Don Zimmerman |
| 20 | */ |
| 21 | |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/timer.h> |
| 24 | #include <linux/string.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/ioport.h> |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/stat.h> |
| 29 | #include <linux/blkdev.h> |
| 30 | #include <linux/interrupt.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/smp_lock.h> |
| 33 | #include <linux/pci.h> |
| 34 | |
| 35 | #define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGTERM)) |
| 36 | |
| 37 | #include <asm/system.h> |
| 38 | #include <asm/irq.h> |
| 39 | #include <asm/dma.h> |
| 40 | |
| 41 | #include "scsi.h" |
| 42 | #include <scsi/scsi_host.h> // struct Scsi_Host definition for T handler |
| 43 | #include "cpqfcTSchip.h" |
| 44 | #include "cpqfcTSstructs.h" |
| 45 | #include "cpqfcTStrigger.h" |
| 46 | |
| 47 | //#define LOGIN_DBG 1 |
| 48 | |
| 49 | // REMARKS: |
| 50 | // Since Tachyon chips may be permitted to wait from 500ms up to 2 sec |
| 51 | // to empty an outgoing frame from its FIFO to the Fibre Channel stream, |
| 52 | // we cannot do everything we need to in the interrupt handler. Specifically, |
| 53 | // every time a link re-init (e.g. LIP) takes place, all SCSI I/O has to be |
| 54 | // suspended until the login sequences have been completed. Login commands |
| 55 | // are frames just like SCSI commands are frames; they are subject to the same |
| 56 | // timeout issues and delays. Also, various specs provide up to 2 seconds for |
| 57 | // devices to log back in (i.e. respond with ACC to a login frame), so I/O to |
| 58 | // that device has to be suspended. |
| 59 | // A serious problem here occurs on highly loaded FC-AL systems. If our FC port |
| 60 | // has a low priority (e.g. high arbitrated loop physical address, alpa), and |
| 61 | // some other device is hogging bandwidth (permissible under FC-AL), we might |
| 62 | // time out thinking the link is hung, when it's simply busy. Many such |
| 63 | // considerations complicate the design. Although Tachyon assumes control |
| 64 | // (in silicon) for many link-specific issues, the Linux driver is left with the |
| 65 | // rest, which turns out to be a difficult, time critical chore. |
| 66 | |
| 67 | // These "worker" functions will handle things like FC Logins; all |
| 68 | // processes with I/O to our device must wait for the Login to complete |
| 69 | // and (if successful) I/O to resume. In the event of a malfunctioning or |
| 70 | // very busy loop, it may take hundreds of millisecs or even seconds to complete |
| 71 | // a frame send. We don't want to hang up the entire server (and all |
| 72 | // processes which don't depend on Fibre) during this wait. |
| 73 | |
| 74 | // The Tachyon chip can have around 30,000 I/O operations ("exchanges") |
| 75 | // open at one time. However, each exchange must be initiated |
| 76 | // synchronously (i.e. each of the 30k I/O had to be started one at a |
| 77 | // time by sending a starting frame via Tachyon's outbound que). |
| 78 | |
| 79 | // To accommodate kernel "module" build, this driver limits the exchanges |
| 80 | // to 256, because of the contiguous physical memory limitation of 128M. |
| 81 | |
| 82 | // Typical FC Exchanges are opened presuming the FC frames start without errors, |
| 83 | // while Exchange completion is handled in the interrupt handler. This |
| 84 | // optimizes performance for the "everything's working" case. |
| 85 | // However, when we have FC related errors or hot plugging of FC ports, we pause |
| 86 | // I/O and handle FC-specific tasks in the worker thread. These FC-specific |
| 87 | // functions will handle things like FC Logins and Aborts. As the Login sequence |
| 88 | // completes to each and every target, I/O can resume to that target. |
| 89 | |
| 90 | // Our kernel "worker thread" must share the HBA with threads calling |
| 91 | // "queuecommand". We define a "BoardLock" semaphore which indicates |
| 92 | // to "queuecommand" that the HBA is unavailable, and Cmnds are added to a |
| 93 | // board lock Q. When the worker thread finishes with the board, the board |
| 94 | // lock Q commands are completed with status causing immediate retry. |
| 95 | // Typically, the board is locked while Logins are in progress after an |
| 96 | // FC Link Down condition. When Cmnds are re-queued after board lock, the |
| 97 | // particular Scsi channel/target may or may not have logged back in. When |
| 98 | // the device is waiting for login, the "prli" flag is clear, in which case |
| 99 | // commands are passed to a Link Down Q. Whenever the login finally completes, |
| 100 | // the LinkDown Q is completed, again with status causing immediate retry. |
| 101 | // When FC devices are logged in, we build and start FC commands to the |
| 102 | // devices. |
| 103 | |
| 104 | // NOTE!! As of May 2000, kernel 2.2.14, the error recovery logic for devices |
| 105 | // that never log back in (e.g. physically removed) is NOT completely |
| 106 | // understood. I've still seen instances of system hangs on failed Write |
| 107 | // commands (possibly from the ext2 layer?) on device removal. Such special |
| 108 | // cases need to be evaluated from a system/application view - e.g., how |
| 109 | // exactly does the system want me to complete commands when the device is |
| 110 | // physically removed?? |
| 111 | |
| 112 | // local functions |
| 113 | |
| 114 | static void SetLoginFields( |
| 115 | PFC_LOGGEDIN_PORT pLoggedInPort, |
| 116 | TachFCHDR_GCMND* fchs, |
| 117 | BOOLEAN PDisc, |
| 118 | BOOLEAN Originator); |
| 119 | |
| 120 | static void AnalyzeIncomingFrame( |
| 121 | CPQFCHBA *cpqfcHBAdata, |
| 122 | ULONG QNdx ); |
| 123 | |
| 124 | static void SendLogins( CPQFCHBA *cpqfcHBAdata, __u32 *FabricPortIds ); |
| 125 | |
| 126 | static int verify_PLOGI( PTACHYON fcChip, |
| 127 | TachFCHDR_GCMND* fchs, ULONG* reject_explain); |
| 128 | static int verify_PRLI( TachFCHDR_GCMND* fchs, ULONG* reject_explain); |
| 129 | |
| 130 | static void LoadWWN( PTACHYON fcChip, UCHAR* dest, UCHAR type); |
| 131 | static void BuildLinkServicePayload( |
| 132 | PTACHYON fcChip, ULONG type, void* payload); |
| 133 | |
| 134 | static void UnblockScsiDevice( struct Scsi_Host *HostAdapter, |
| 135 | PFC_LOGGEDIN_PORT pLoggedInPort); |
| 136 | |
| 137 | static void cpqfcTSCheckandSnoopFCP( PTACHYON fcChip, ULONG x_ID); |
| 138 | |
| 139 | static void CompleteBoardLockCmnd( CPQFCHBA *cpqfcHBAdata); |
| 140 | |
| 141 | static void RevalidateSEST( struct Scsi_Host *HostAdapter, |
| 142 | PFC_LOGGEDIN_PORT pLoggedInPort); |
| 143 | |
| 144 | static void IssueReportLunsCommand( |
| 145 | CPQFCHBA* cpqfcHBAdata, |
| 146 | TachFCHDR_GCMND* fchs); |
| 147 | |
| 148 | // (see scsi_error.c comments on kernel task creation) |
| 149 | |
| 150 | void cpqfcTSWorkerThread( void *host) |
| 151 | { |
| 152 | struct Scsi_Host *HostAdapter = (struct Scsi_Host*)host; |
| 153 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 154 | #ifdef PCI_KERNEL_TRACE |
| 155 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 156 | #endif |
| 157 | DECLARE_MUTEX_LOCKED(fcQueReady); |
| 158 | DECLARE_MUTEX_LOCKED(fcTYOBcomplete); |
| 159 | DECLARE_MUTEX_LOCKED(TachFrozen); |
| 160 | DECLARE_MUTEX_LOCKED(BoardLock); |
| 161 | |
| 162 | ENTER("WorkerThread"); |
| 163 | |
| 164 | lock_kernel(); |
| 165 | daemonize("cpqfcTS_wt_%d", HostAdapter->host_no); |
| 166 | siginitsetinv(¤t->blocked, SHUTDOWN_SIGS); |
| 167 | |
| 168 | |
| 169 | cpqfcHBAdata->fcQueReady = &fcQueReady; // primary wait point |
| 170 | cpqfcHBAdata->TYOBcomplete = &fcTYOBcomplete; |
| 171 | cpqfcHBAdata->TachFrozen = &TachFrozen; |
| 172 | |
| 173 | |
| 174 | cpqfcHBAdata->worker_thread = current; |
| 175 | |
| 176 | unlock_kernel(); |
| 177 | |
| 178 | if( cpqfcHBAdata->notify_wt != NULL ) |
| 179 | up( cpqfcHBAdata->notify_wt); // OK to continue |
| 180 | |
| 181 | while(1) |
| 182 | { |
| 183 | unsigned long flags; |
| 184 | |
| 185 | down_interruptible( &fcQueReady); // wait for something to do |
| 186 | |
| 187 | if (signal_pending(current) ) |
| 188 | break; |
| 189 | |
| 190 | PCI_TRACE( 0x90) |
| 191 | // first, take the IO lock so the SCSI upper layers can't call |
| 192 | // into our _quecommand function (this also disables INTs) |
| 193 | spin_lock_irqsave( HostAdapter->host_lock, flags); // STOP _que function |
| 194 | PCI_TRACE( 0x90) |
| 195 | |
| 196 | CPQ_SPINLOCK_HBA( cpqfcHBAdata) |
| 197 | // next, set this pointer to indicate to the _quecommand function |
| 198 | // that the board is in use, so it should que the command and |
| 199 | // immediately return (we don't actually require the semaphore function |
| 200 | // in this driver rev) |
| 201 | |
| 202 | cpqfcHBAdata->BoardLock = &BoardLock; |
| 203 | |
| 204 | PCI_TRACE( 0x90) |
| 205 | |
| 206 | // release the IO lock (and re-enable interrupts) |
| 207 | spin_unlock_irqrestore( HostAdapter->host_lock, flags); |
| 208 | |
| 209 | // disable OUR HBA interrupt (keep them off as much as possible |
| 210 | // during error recovery) |
| 211 | disable_irq( cpqfcHBAdata->HostAdapter->irq); |
| 212 | |
| 213 | // OK, let's process the Fibre Channel Link Q and do the work |
| 214 | cpqfcTS_WorkTask( HostAdapter); |
| 215 | |
| 216 | // hopefully, no more "work" to do; |
| 217 | // re-enable our INTs for "normal" completion processing |
| 218 | enable_irq( cpqfcHBAdata->HostAdapter->irq); |
| 219 | |
| 220 | |
| 221 | cpqfcHBAdata->BoardLock = NULL; // allow commands to be queued |
| 222 | CPQ_SPINUNLOCK_HBA( cpqfcHBAdata) |
| 223 | |
| 224 | |
| 225 | // Now, complete any Cmnd we Q'd up while BoardLock was held |
| 226 | |
| 227 | CompleteBoardLockCmnd( cpqfcHBAdata); |
| 228 | |
| 229 | |
| 230 | } |
| 231 | // hopefully, the signal was for our module exit... |
| 232 | if( cpqfcHBAdata->notify_wt != NULL ) |
| 233 | up( cpqfcHBAdata->notify_wt); // yep, we're outta here |
| 234 | } |
| 235 | |
| 236 | |
| 237 | // Freeze Tachyon routine. |
| 238 | // If Tachyon is already frozen, return FALSE |
| 239 | // If Tachyon is not frozen, call freeze function, return TRUE |
| 240 | // |
| 241 | static BOOLEAN FreezeTach( CPQFCHBA *cpqfcHBAdata) |
| 242 | { |
| 243 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 244 | BOOLEAN FrozeTach = FALSE; |
| 245 | // It's possible that the chip is already frozen; if so, |
| 246 | // "Freezing" again will NOT! generate another Freeze |
| 247 | // Completion Message. |
| 248 | |
| 249 | if( (fcChip->Registers.TYstatus.value & 0x70000) != 0x70000) |
| 250 | { // (need to freeze...) |
| 251 | fcChip->FreezeTachyon( fcChip, 2); // both ERQ and FCP assists |
| 252 | |
| 253 | // 2. Get Tach freeze confirmation |
| 254 | // (synchronize SEST manipulation with Freeze Completion Message) |
| 255 | // we need INTs on so semaphore can be set. |
| 256 | enable_irq( cpqfcHBAdata->HostAdapter->irq); // only way to get Semaphore |
| 257 | down_interruptible( cpqfcHBAdata->TachFrozen); // wait for INT handler sem. |
| 258 | // can we TIMEOUT semaphore wait?? TBD |
| 259 | disable_irq( cpqfcHBAdata->HostAdapter->irq); |
| 260 | |
| 261 | FrozeTach = TRUE; |
| 262 | } // (else, already frozen) |
| 263 | |
| 264 | return FrozeTach; |
| 265 | } |
| 266 | |
| 267 | |
| 268 | |
| 269 | |
| 270 | // This is the kernel worker thread task, which processes FC |
| 271 | // tasks which were queued by the Interrupt handler or by |
| 272 | // other WorkTask functions. |
| 273 | |
| 274 | #define DBG 1 |
| 275 | //#undef DBG |
| 276 | void cpqfcTS_WorkTask( struct Scsi_Host *HostAdapter) |
| 277 | { |
| 278 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 279 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 280 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 281 | ULONG QconsumerNdx; |
| 282 | LONG ExchangeID; |
| 283 | ULONG ulStatus=0; |
| 284 | TachFCHDR_GCMND fchs; |
| 285 | PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ; |
| 286 | |
| 287 | ENTER("WorkTask"); |
| 288 | |
| 289 | // copy current index to work on |
| 290 | QconsumerNdx = fcLQ->consumer; |
| 291 | |
| 292 | PCI_TRACEO( fcLQ->Qitem[QconsumerNdx].Type, 0x90) |
| 293 | |
| 294 | |
| 295 | // NOTE: when this switch completes, we will "consume" the Que item |
| 296 | // printk("Que type %Xh\n", fcLQ->Qitem[QconsumerNdx].Type); |
| 297 | switch( fcLQ->Qitem[QconsumerNdx].Type ) |
| 298 | { |
| 299 | // incoming frame - link service (ACC, UNSOL REQ, etc.) |
| 300 | // or FCP-SCSI command |
| 301 | case SFQ_UNKNOWN: |
| 302 | AnalyzeIncomingFrame( cpqfcHBAdata, QconsumerNdx ); |
| 303 | |
| 304 | break; |
| 305 | |
| 306 | |
| 307 | |
| 308 | case EXCHANGE_QUEUED: // an Exchange (i.e. FCP-SCSI) was previously |
| 309 | // Queued because the link was down. The |
| 310 | // heartbeat timer detected it and Queued it here. |
| 311 | // We attempt to start it again, and if |
| 312 | // successful we clear the EXCHANGE_Q flag. |
| 313 | // If the link doesn't come up, the Exchange |
| 314 | // will eventually time-out. |
| 315 | |
| 316 | ExchangeID = (LONG) // x_ID copied from DPC timeout function |
| 317 | fcLQ->Qitem[QconsumerNdx].ulBuff[0]; |
| 318 | |
| 319 | // It's possible that a Q'd exchange could have already |
| 320 | // been started by other logic (e.g. ABTS process) |
| 321 | // Don't start if already started (Q'd flag clear) |
| 322 | |
| 323 | if( Exchanges->fcExchange[ExchangeID].status & EXCHANGE_QUEUED ) |
| 324 | { |
| 325 | // printk(" *Start Q'd x_ID %Xh: type %Xh ", |
| 326 | // ExchangeID, Exchanges->fcExchange[ExchangeID].type); |
| 327 | |
| 328 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID); |
| 329 | if( !ulStatus ) |
| 330 | { |
| 331 | // printk("success* "); |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | #ifdef DBG |
| 336 | |
| 337 | if( ulStatus == EXCHANGE_QUEUED) |
| 338 | printk("Queued* "); |
| 339 | else |
| 340 | printk("failed* "); |
| 341 | |
| 342 | #endif |
| 343 | } |
| 344 | } |
| 345 | break; |
| 346 | |
| 347 | |
| 348 | case LINKDOWN: |
| 349 | // (lots of things already done in INT handler) future here? |
| 350 | break; |
| 351 | |
| 352 | |
| 353 | case LINKACTIVE: // Tachyon set the Lup bit in FM status |
| 354 | // NOTE: some misbehaving FC ports (like Tach2.1) |
| 355 | // can re-LIP immediately after a LIP completes. |
| 356 | |
| 357 | // if "initiator", need to verify LOGs with ports |
| 358 | // printk("\n*LNKUP* "); |
| 359 | |
| 360 | if( fcChip->Options.initiator ) |
| 361 | SendLogins( cpqfcHBAdata, NULL ); // PLOGI or PDISC, based on fcPort data |
| 362 | // if SendLogins successfully completes, PortDiscDone |
| 363 | // will be set. |
| 364 | |
| 365 | |
| 366 | // If SendLogins was successful, then we expect to get incoming |
| 367 | // ACCepts or REJECTs, which are handled below. |
| 368 | |
| 369 | break; |
| 370 | |
| 371 | // LinkService and Fabric request/reply processing |
| 372 | case ELS_FDISC: // need to send Fabric Discovery (Login) |
| 373 | case ELS_FLOGI: // need to send Fabric Login |
| 374 | case ELS_SCR: // need to send State Change Registration |
| 375 | case FCS_NSR: // need to send Name Service Request |
| 376 | case ELS_PLOGI: // need to send PLOGI |
| 377 | case ELS_ACC: // send generic ACCept |
| 378 | case ELS_PLOGI_ACC: // need to send ELS ACCept frame to recv'd PLOGI |
| 379 | case ELS_PRLI_ACC: // need to send ELS ACCept frame to recv'd PRLI |
| 380 | case ELS_LOGO: // need to send ELS LOGO (logout) |
| 381 | case ELS_LOGO_ACC: // need to send ELS ACCept frame to recv'd PLOGI |
| 382 | case ELS_RJT: // ReJecT reply |
| 383 | case ELS_PRLI: // need to send ELS PRLI |
| 384 | |
| 385 | |
| 386 | // printk(" *ELS %Xh* ", fcLQ->Qitem[QconsumerNdx].Type); |
| 387 | // if PortDiscDone is not set, it means the SendLogins routine |
| 388 | // failed to complete -- assume that LDn occurred, so login frames |
| 389 | // are invalid |
| 390 | if( !cpqfcHBAdata->PortDiscDone) // cleared by LDn |
| 391 | { |
| 392 | printk("Discard Q'd ELS login frame\n"); |
| 393 | break; |
| 394 | } |
| 395 | |
| 396 | ulStatus = cpqfcTSBuildExchange( |
| 397 | cpqfcHBAdata, |
| 398 | fcLQ->Qitem[QconsumerNdx].Type, // e.g. PLOGI |
| 399 | (TachFCHDR_GCMND*) |
| 400 | fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs |
| 401 | NULL, // no data (no scatter/gather list) |
| 402 | &ExchangeID );// fcController->fcExchanges index, -1 if failed |
| 403 | |
| 404 | if( !ulStatus ) // Exchange setup? |
| 405 | { |
| 406 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID ); |
| 407 | if( !ulStatus ) |
| 408 | { |
| 409 | // submitted to Tach's Outbound Que (ERQ PI incremented) |
| 410 | // waited for completion for ELS type (Login frames issued |
| 411 | // synchronously) |
| 412 | } |
| 413 | else |
| 414 | // check reason for Exchange not being started - we might |
| 415 | // want to Queue and start later, or fail with error |
| 416 | { |
| 417 | |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | else // Xchange setup failed... |
| 422 | printk(" cpqfcTSBuildExchange failed: %Xh\n", ulStatus ); |
| 423 | |
| 424 | break; |
| 425 | |
| 426 | case SCSI_REPORT_LUNS: |
| 427 | // pass the incoming frame (actually, it's a PRLI frame) |
| 428 | // so we can send REPORT_LUNS, in order to determine VSA/PDU |
| 429 | // FCP-SCSI Lun address mode |
| 430 | IssueReportLunsCommand( cpqfcHBAdata, (TachFCHDR_GCMND*) |
| 431 | fcLQ->Qitem[QconsumerNdx].ulBuff); |
| 432 | |
| 433 | break; |
| 434 | |
| 435 | |
| 436 | |
| 437 | |
| 438 | case BLS_ABTS: // need to ABORT one or more exchanges |
| 439 | { |
| 440 | LONG x_ID = fcLQ->Qitem[QconsumerNdx].ulBuff[0]; |
| 441 | BOOLEAN FrozeTach = FALSE; |
| 442 | |
| 443 | if ( x_ID >= TACH_SEST_LEN ) // (in)sanity check |
| 444 | { |
| 445 | // printk( " cpqfcTS ERROR! BOGUS x_ID %Xh", x_ID); |
| 446 | break; |
| 447 | } |
| 448 | |
| 449 | |
| 450 | if( Exchanges->fcExchange[ x_ID].Cmnd == NULL ) // should be RARE |
| 451 | { |
| 452 | // printk(" ABTS %Xh Scsi Cmnd null! ", x_ID); |
| 453 | |
| 454 | break; // nothing to abort! |
| 455 | } |
| 456 | |
| 457 | //#define ABTS_DBG |
| 458 | #ifdef ABTS_DBG |
| 459 | printk("INV SEST[%X] ", x_ID); |
| 460 | if( Exchanges->fcExchange[x_ID].status & FC2_TIMEOUT) |
| 461 | { |
| 462 | printk("FC2TO"); |
| 463 | } |
| 464 | if( Exchanges->fcExchange[x_ID].status & INITIATOR_ABORT) |
| 465 | { |
| 466 | printk("IA"); |
| 467 | } |
| 468 | if( Exchanges->fcExchange[x_ID].status & PORTID_CHANGED) |
| 469 | { |
| 470 | printk("PORTID"); |
| 471 | } |
| 472 | if( Exchanges->fcExchange[x_ID].status & DEVICE_REMOVED) |
| 473 | { |
| 474 | printk("DEVRM"); |
| 475 | } |
| 476 | if( Exchanges->fcExchange[x_ID].status & LINKFAIL_TX) |
| 477 | { |
| 478 | printk("LKF"); |
| 479 | } |
| 480 | if( Exchanges->fcExchange[x_ID].status & FRAME_TO) |
| 481 | { |
| 482 | printk("FRMTO"); |
| 483 | } |
| 484 | if( Exchanges->fcExchange[x_ID].status & ABORTSEQ_NOTIFY) |
| 485 | { |
| 486 | printk("ABSQ"); |
| 487 | } |
| 488 | if( Exchanges->fcExchange[x_ID].status & SFQ_FRAME) |
| 489 | { |
| 490 | printk("SFQFR"); |
| 491 | } |
| 492 | |
| 493 | if( Exchanges->fcExchange[ x_ID].type == 0x2000) |
| 494 | printk(" WR"); |
| 495 | else if( Exchanges->fcExchange[ x_ID].type == 0x3000) |
| 496 | printk(" RD"); |
| 497 | else if( Exchanges->fcExchange[ x_ID].type == 0x10) |
| 498 | printk(" ABTS"); |
| 499 | else |
| 500 | printk(" %Xh", Exchanges->fcExchange[ x_ID].type); |
| 501 | |
| 502 | if( !(Exchanges->fcExchange[x_ID].status & INITIATOR_ABORT)) |
| 503 | { |
| 504 | printk(" Cmd %p, ", |
| 505 | Exchanges->fcExchange[ x_ID].Cmnd); |
| 506 | |
| 507 | printk(" brd/chn/trg/lun %d/%d/%d/%d port_id %06X\n", |
| 508 | cpqfcHBAdata->HBAnum, |
| 509 | Exchanges->fcExchange[ x_ID].Cmnd->channel, |
| 510 | Exchanges->fcExchange[ x_ID].Cmnd->target, |
| 511 | Exchanges->fcExchange[ x_ID].Cmnd->lun, |
| 512 | Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF); |
| 513 | } |
| 514 | else // assume that Cmnd ptr is invalid on _abort() |
| 515 | { |
| 516 | printk(" Cmd ptr invalid\n"); |
| 517 | } |
| 518 | |
| 519 | #endif |
| 520 | |
| 521 | |
| 522 | // Steps to ABORT a SEST exchange: |
| 523 | // 1. Freeze TL SCSI assists & ERQ (everything) |
| 524 | // 2. Receive FROZEN inbound CM (must succeed!) |
| 525 | // 3. Invalidate x_ID SEST entry |
| 526 | // 4. Resume TL SCSI assists & ERQ (everything) |
| 527 | // 5. Build/start on exchange - change "type" to BLS_ABTS, |
| 528 | // timeout to X sec (RA_TOV from PLDA is actually 0) |
| 529 | // 6. Set Exchange Q'd status if ABTS cannot be started, |
| 530 | // or simply complete Exchange in "Terminate" condition |
| 531 | |
| 532 | PCI_TRACEO( x_ID, 0xB4) |
| 533 | |
| 534 | // 1 & 2 . Freeze Tach & get confirmation of freeze |
| 535 | FrozeTach = FreezeTach( cpqfcHBAdata); |
| 536 | |
| 537 | // 3. OK, Tachyon is frozen, so we can invalidate SEST exchange. |
| 538 | // FC2_TIMEOUT means we are originating the abort, while |
| 539 | // TARGET_ABORT means we are ACCepting an abort. |
| 540 | // LINKFAIL_TX, ABORTSEQ_NOFITY, INV_ENTRY or FRAME_TO are |
| 541 | // all from Tachyon: |
| 542 | // Exchange was corrupted by LDn or other FC physical failure |
| 543 | // INITIATOR_ABORT means the upper layer driver/application |
| 544 | // requested the abort. |
| 545 | |
| 546 | |
| 547 | |
| 548 | // clear bit 31 (VALid), to invalidate & take control from TL |
| 549 | fcChip->SEST->u[ x_ID].IWE.Hdr_Len &= 0x7FFFFFFF; |
| 550 | |
| 551 | |
| 552 | // examine and Tach's "Linked List" for IWEs that |
| 553 | // received (nearly) simultaneous transfer ready (XRDY) |
| 554 | // repair linked list if necessary (TBD!) |
| 555 | // (If we ignore the "Linked List", we will time out |
| 556 | // WRITE commands where we received the FCP-SCSI XFRDY |
| 557 | // frame (because Tachyon didn't processes it). Linked List |
| 558 | // management should be done as an optimization. |
| 559 | |
| 560 | // readl( fcChip->Registers.ReMapMemBase+TL_MEM_SEST_LINKED_LIST )); |
| 561 | |
| 562 | |
| 563 | |
| 564 | |
| 565 | // 4. Resume all Tachlite functions (for other open Exchanges) |
| 566 | // as quickly as possible to allow other exchanges to other ports |
| 567 | // to resume. Freezing Tachyon may cause cascading errors, because |
| 568 | // any received SEST frame cannot be processed by the SEST. |
| 569 | // Don't "unfreeze" unless Link is operational |
| 570 | if( FrozeTach ) // did we just freeze it (above)? |
| 571 | fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists |
| 572 | |
| 573 | |
| 574 | PCI_TRACEO( x_ID, 0xB4) |
| 575 | |
| 576 | // Note there is no confirmation that the chip is "unfrozen". Also, |
| 577 | // if the Link is down when unfreeze is called, it has no effect. |
| 578 | // Chip will unfreeze when the Link is back up. |
| 579 | |
| 580 | // 5. Now send out Abort commands if possible |
| 581 | // Some Aborts can't be "sent" (Port_id changed or gone); |
| 582 | // if the device is gone, there is no port_id to send the ABTS to. |
| 583 | |
| 584 | if( !(Exchanges->fcExchange[ x_ID].status & PORTID_CHANGED) |
| 585 | && |
| 586 | !(Exchanges->fcExchange[ x_ID].status & DEVICE_REMOVED) ) |
| 587 | { |
| 588 | Exchanges->fcExchange[ x_ID].type = BLS_ABTS; |
| 589 | fchs.s_id = Exchanges->fcExchange[ x_ID].fchs.d_id; |
| 590 | ulStatus = cpqfcTSBuildExchange( |
| 591 | cpqfcHBAdata, |
| 592 | BLS_ABTS, |
| 593 | &fchs, // (uses only s_id) |
| 594 | NULL, // (no scatter/gather list for ABTS) |
| 595 | &x_ID );// ABTS on this Exchange ID |
| 596 | |
| 597 | if( !ulStatus ) // Exchange setup build OK? |
| 598 | { |
| 599 | |
| 600 | // ABTS may be needed because an Exchange was corrupted |
| 601 | // by a Link disruption. If the Link is UP, we can |
| 602 | // presume that this ABTS can start immediately; otherwise, |
| 603 | // set Que'd status so the Login functions |
| 604 | // can restart it when the FC physical Link is restored |
| 605 | if( ((fcChip->Registers.FMstatus.value &0xF0) &0x80)) // loop init? |
| 606 | { |
| 607 | // printk(" *set Q status x_ID %Xh on LDn* ", x_ID); |
| 608 | Exchanges->fcExchange[ x_ID].status |= EXCHANGE_QUEUED; |
| 609 | } |
| 610 | |
| 611 | else // what FC device (port_id) does the Cmd belong to? |
| 612 | { |
| 613 | PFC_LOGGEDIN_PORT pLoggedInPort = |
| 614 | Exchanges->fcExchange[ x_ID].pLoggedInPort; |
| 615 | |
| 616 | // if Port is logged in, we might start the abort. |
| 617 | |
| 618 | if( (pLoggedInPort != NULL) |
| 619 | && |
| 620 | (pLoggedInPort->prli == TRUE) ) |
| 621 | { |
| 622 | // it's possible that an Exchange has already been Queued |
| 623 | // to start after Login completes. Check and don't |
| 624 | // start it (again) here if Q'd status set |
| 625 | // printk(" ABTS xchg %Xh ", x_ID); |
| 626 | if( Exchanges->fcExchange[x_ID].status & EXCHANGE_QUEUED) |
| 627 | { |
| 628 | // printk("already Q'd "); |
| 629 | } |
| 630 | else |
| 631 | { |
| 632 | // printk("starting "); |
| 633 | |
| 634 | fcChip->fcStats.FC2aborted++; |
| 635 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, x_ID ); |
| 636 | if( !ulStatus ) |
| 637 | { |
| 638 | // OK |
| 639 | // submitted to Tach's Outbound Que (ERQ PI incremented) |
| 640 | } |
| 641 | else |
| 642 | { |
| 643 | /* printk("ABTS exchange start failed -status %Xh, x_ID %Xh ", |
| 644 | ulStatus, x_ID); |
| 645 | */ |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | else |
| 650 | { |
| 651 | /* printk(" ABTS NOT starting xchg %Xh, %p ", |
| 652 | x_ID, pLoggedInPort); |
| 653 | if( pLoggedInPort ) |
| 654 | printk("prli %d ", pLoggedInPort->prli); |
| 655 | */ |
| 656 | } |
| 657 | } |
| 658 | } |
| 659 | else // what the #@! |
| 660 | { // how do we fail to build an Exchange for ABTS?? |
| 661 | printk("ABTS exchange build failed -status %Xh, x_ID %Xh\n", |
| 662 | ulStatus, x_ID); |
| 663 | } |
| 664 | } |
| 665 | else // abort without ABTS -- just complete exchange/Cmnd to Linux |
| 666 | { |
| 667 | // printk(" *Terminating x_ID %Xh on %Xh* ", |
| 668 | // x_ID, Exchanges->fcExchange[x_ID].status); |
| 669 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, x_ID); |
| 670 | |
| 671 | } |
| 672 | } // end of ABTS case |
| 673 | break; |
| 674 | |
| 675 | |
| 676 | |
| 677 | case BLS_ABTS_ACC: // need to ACCept one ABTS |
| 678 | // (NOTE! this code not updated for Linux yet..) |
| 679 | |
| 680 | |
| 681 | printk(" *ABTS_ACC* "); |
| 682 | // 1. Freeze TL |
| 683 | |
| 684 | fcChip->FreezeTachyon( fcChip, 2); // both ERQ and FCP assists |
| 685 | |
| 686 | memcpy( // copy the incoming ABTS frame |
| 687 | &fchs, |
| 688 | fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs |
| 689 | sizeof( fchs)); |
| 690 | |
| 691 | // 3. OK, Tachyon is frozen so we can invalidate SEST entry |
| 692 | // (if necessary) |
| 693 | // Status FC2_TIMEOUT means we are originating the abort, while |
| 694 | // TARGET_ABORT means we are ACCepting an abort |
| 695 | |
| 696 | ExchangeID = fchs.ox_rx_id & 0x7FFF; // RX_ID for exchange |
| 697 | // printk("ABTS ACC for Target ExchangeID %Xh\n", ExchangeID); |
| 698 | |
| 699 | |
| 700 | // sanity check on received ExchangeID |
| 701 | if( Exchanges->fcExchange[ ExchangeID].status == TARGET_ABORT ) |
| 702 | { |
| 703 | // clear bit 31 (VALid), to invalidate & take control from TL |
| 704 | // printk("Invalidating SEST exchange %Xh\n", ExchangeID); |
| 705 | fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len &= 0x7FFFFFFF; |
| 706 | } |
| 707 | |
| 708 | |
| 709 | // 4. Resume all Tachlite functions (for other open Exchanges) |
| 710 | // as quickly as possible to allow other exchanges to other ports |
| 711 | // to resume. Freezing Tachyon for too long may royally screw |
| 712 | // up everything! |
| 713 | fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists |
| 714 | |
| 715 | // Note there is no confirmation that the chip is "unfrozen". Also, |
| 716 | // if the Link is down when unfreeze is called, it has no effect. |
| 717 | // Chip will unfreeze when the Link is back up. |
| 718 | |
| 719 | // 5. Now send out Abort ACC reply for this exchange |
| 720 | Exchanges->fcExchange[ ExchangeID].type = BLS_ABTS_ACC; |
| 721 | |
| 722 | fchs.s_id = Exchanges->fcExchange[ ExchangeID].fchs.d_id; |
| 723 | ulStatus = cpqfcTSBuildExchange( |
| 724 | cpqfcHBAdata, |
| 725 | BLS_ABTS_ACC, |
| 726 | &fchs, |
| 727 | NULL, // no data (no scatter/gather list) |
| 728 | &ExchangeID );// fcController->fcExchanges index, -1 if failed |
| 729 | |
| 730 | if( !ulStatus ) // Exchange setup? |
| 731 | { |
| 732 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID ); |
| 733 | if( !ulStatus ) |
| 734 | { |
| 735 | // submitted to Tach's Outbound Que (ERQ PI incremented) |
| 736 | // waited for completion for ELS type (Login frames issued |
| 737 | // synchronously) |
| 738 | } |
| 739 | else |
| 740 | // check reason for Exchange not being started - we might |
| 741 | // want to Queue and start later, or fail with error |
| 742 | { |
| 743 | |
| 744 | } |
| 745 | } |
| 746 | break; |
| 747 | |
| 748 | |
| 749 | case BLS_ABTS_RJT: // need to ReJecT one ABTS; reject implies the |
| 750 | // exchange doesn't exist in the TARGET context. |
| 751 | // ExchangeID has to come from LinkService space. |
| 752 | |
| 753 | printk(" *ABTS_RJT* "); |
| 754 | ulStatus = cpqfcTSBuildExchange( |
| 755 | cpqfcHBAdata, |
| 756 | BLS_ABTS_RJT, |
| 757 | (TachFCHDR_GCMND*) |
| 758 | fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs |
| 759 | NULL, // no data (no scatter/gather list) |
| 760 | &ExchangeID );// fcController->fcExchanges index, -1 if failed |
| 761 | |
| 762 | if( !ulStatus ) // Exchange setup OK? |
| 763 | { |
| 764 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID ); |
| 765 | // If it fails, we aren't required to retry. |
| 766 | } |
| 767 | if( ulStatus ) |
| 768 | { |
| 769 | printk("Failed to send BLS_RJT for ABTS, X_ID %Xh\n", ExchangeID); |
| 770 | } |
| 771 | else |
| 772 | { |
| 773 | printk("Sent BLS_RJT for ABTS, X_ID %Xh\n", ExchangeID); |
| 774 | |
| 775 | } |
| 776 | |
| 777 | break; |
| 778 | |
| 779 | |
| 780 | |
| 781 | default: |
| 782 | break; |
| 783 | } // end switch |
| 784 | //doNothing: |
| 785 | // done with this item - now set the NEXT index |
| 786 | |
| 787 | if( QconsumerNdx+1 >= FC_LINKQ_DEPTH ) // rollover test |
| 788 | { |
| 789 | fcLQ->consumer = 0; |
| 790 | } |
| 791 | else |
| 792 | { |
| 793 | fcLQ->consumer++; |
| 794 | } |
| 795 | |
| 796 | PCI_TRACEO( fcLQ->Qitem[QconsumerNdx].Type, 0x94) |
| 797 | |
| 798 | LEAVE("WorkTask"); |
| 799 | return; |
| 800 | } |
| 801 | |
| 802 | |
| 803 | |
| 804 | |
| 805 | // When Tachyon reports link down, bad al_pa, or Link Service (e.g. Login) |
| 806 | // commands come in, post to the LinkQ so that action can be taken outside the |
| 807 | // interrupt handler. |
| 808 | // This circular Q works like Tachyon's que - the producer points to the next |
| 809 | // (unused) entry. Called by Interrupt handler, WorkerThread, Timer |
| 810 | // sputlinkq |
| 811 | void cpqfcTSPutLinkQue( CPQFCHBA *cpqfcHBAdata, |
| 812 | int Type, |
| 813 | void *QueContent) |
| 814 | { |
| 815 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 816 | // FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 817 | PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ; |
| 818 | ULONG ndx; |
| 819 | |
| 820 | ENTER("cpqfcTSPutLinkQ"); |
| 821 | |
| 822 | ndx = fcLQ->producer; |
| 823 | |
| 824 | ndx += 1; // test for Que full |
| 825 | |
| 826 | |
| 827 | |
| 828 | if( ndx >= FC_LINKQ_DEPTH ) // rollover test |
| 829 | ndx = 0; |
| 830 | |
| 831 | if( ndx == fcLQ->consumer ) // QUE full test |
| 832 | { |
| 833 | // QUE was full! lost LK command (fatal to logic) |
| 834 | fcChip->fcStats.lnkQueFull++; |
| 835 | |
| 836 | printk("*LinkQ Full!*"); |
| 837 | TriggerHBA( fcChip->Registers.ReMapMemBase, 1); |
| 838 | /* |
| 839 | { |
| 840 | int i; |
| 841 | printk("LinkQ PI %d, CI %d\n", fcLQ->producer, |
| 842 | fcLQ->consumer); |
| 843 | |
| 844 | for( i=0; i< FC_LINKQ_DEPTH; ) |
| 845 | { |
| 846 | printk(" [%d]%Xh ", i, fcLQ->Qitem[i].Type); |
| 847 | if( (++i %8) == 0) printk("\n"); |
| 848 | } |
| 849 | |
| 850 | } |
| 851 | */ |
| 852 | printk( "cpqfcTS: WARNING!! PutLinkQue - FULL!\n"); // we're hung |
| 853 | } |
| 854 | else // QUE next element |
| 855 | { |
| 856 | // Prevent certain multiple (back-to-back) requests. |
| 857 | // This is important in that we don't want to issue multiple |
| 858 | // ABTS for the same Exchange, or do multiple FM inits, etc. |
| 859 | // We can never be sure of the timing of events reported to |
| 860 | // us by Tach's IMQ, which can depend on system/bus speeds, |
| 861 | // FC physical link circumstances, etc. |
| 862 | |
| 863 | if( (fcLQ->producer != fcLQ->consumer) |
| 864 | && |
| 865 | (Type == FMINIT) ) |
| 866 | { |
| 867 | LONG lastNdx; // compute previous producer index |
| 868 | if( fcLQ->producer) |
| 869 | lastNdx = fcLQ->producer- 1; |
| 870 | else |
| 871 | lastNdx = FC_LINKQ_DEPTH-1; |
| 872 | |
| 873 | |
| 874 | if( fcLQ->Qitem[lastNdx].Type == FMINIT) |
| 875 | { |
| 876 | // printk(" *skip FMINIT Q post* "); |
| 877 | // goto DoneWithPutQ; |
| 878 | } |
| 879 | |
| 880 | } |
| 881 | |
| 882 | // OK, add the Q'd item... |
| 883 | |
| 884 | fcLQ->Qitem[fcLQ->producer].Type = Type; |
| 885 | |
| 886 | memcpy( |
| 887 | fcLQ->Qitem[fcLQ->producer].ulBuff, |
| 888 | QueContent, |
| 889 | sizeof(fcLQ->Qitem[fcLQ->producer].ulBuff)); |
| 890 | |
| 891 | fcLQ->producer = ndx; // increment Que producer |
| 892 | |
| 893 | // set semaphore to wake up Kernel (worker) thread |
| 894 | // |
| 895 | up( cpqfcHBAdata->fcQueReady ); |
| 896 | } |
| 897 | |
| 898 | //DoneWithPutQ: |
| 899 | |
| 900 | LEAVE("cpqfcTSPutLinkQ"); |
| 901 | } |
| 902 | |
| 903 | |
| 904 | |
| 905 | |
| 906 | // reset device ext FC link Q |
| 907 | void cpqfcTSLinkQReset( CPQFCHBA *cpqfcHBAdata) |
| 908 | |
| 909 | { |
| 910 | PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ; |
| 911 | fcLQ->producer = 0; |
| 912 | fcLQ->consumer = 0; |
| 913 | |
| 914 | } |
| 915 | |
| 916 | |
| 917 | |
| 918 | |
| 919 | |
| 920 | // When Tachyon gets an unassisted FCP-SCSI frame, post here so |
| 921 | // an arbitrary context thread (e.g. IOCTL loopback test function) |
| 922 | // can process it. |
| 923 | |
| 924 | // (NOTE: Not revised for Linux) |
| 925 | // This Q works like Tachyon's que - the producer points to the next |
| 926 | // (unused) entry. |
| 927 | void cpqfcTSPutScsiQue( CPQFCHBA *cpqfcHBAdata, |
| 928 | int Type, |
| 929 | void *QueContent) |
| 930 | { |
| 931 | // CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 932 | // PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 933 | |
| 934 | // ULONG ndx; |
| 935 | |
| 936 | // ULONG *pExchangeID; |
| 937 | // LONG ExchangeID; |
| 938 | |
| 939 | /* |
| 940 | KeAcquireSpinLockAtDpcLevel( &pDevExt->fcScsiQueLock); |
| 941 | ndx = pDevExt->fcScsiQue.producer + 1; // test for Que full |
| 942 | |
| 943 | if( ndx >= FC_SCSIQ_DEPTH ) // rollover test |
| 944 | ndx = 0; |
| 945 | |
| 946 | if( ndx == pDevExt->fcScsiQue.consumer ) // QUE full test |
| 947 | { |
| 948 | // QUE was full! lost LK command (fatal to logic) |
| 949 | fcChip->fcStats.ScsiQueFull++; |
| 950 | #ifdef DBG |
| 951 | printk( "fcPutScsiQue - FULL!\n"); |
| 952 | #endif |
| 953 | |
| 954 | } |
| 955 | else // QUE next element |
| 956 | { |
| 957 | pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].Type = Type; |
| 958 | |
| 959 | if( Type == FCP_RSP ) |
| 960 | { |
| 961 | // this TL inbound message type means that a TL SEST exchange has |
| 962 | // copied an FCP response frame into a buffer pointed to by the SEST |
| 963 | // entry. That buffer is allocated in the SEST structure at ->RspHDR. |
| 964 | // Copy the RspHDR for use by the Que handler. |
| 965 | pExchangeID = (ULONG *)QueContent; |
| 966 | |
| 967 | memcpy( |
| 968 | pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff, |
| 969 | &fcChip->SEST->RspHDR[ *pExchangeID ], |
| 970 | sizeof(pDevExt->fcScsiQue.Qitem[0].ulBuff)); // (any element for size) |
| 971 | |
| 972 | } |
| 973 | else |
| 974 | { |
| 975 | memcpy( |
| 976 | pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff, |
| 977 | QueContent, |
| 978 | sizeof(pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff)); |
| 979 | } |
| 980 | |
| 981 | pDevExt->fcScsiQue.producer = ndx; // increment Que |
| 982 | |
| 983 | |
| 984 | KeSetEvent( &pDevExt->TYIBscsi, // signal any waiting thread |
| 985 | 0, // no priority boost |
| 986 | FALSE ); // no waiting later for this event |
| 987 | } |
| 988 | KeReleaseSpinLockFromDpcLevel( &pDevExt->fcScsiQueLock); |
| 989 | */ |
| 990 | } |
| 991 | |
| 992 | |
| 993 | |
| 994 | |
| 995 | |
| 996 | |
| 997 | |
| 998 | static void ProcessELS_Request( CPQFCHBA*,TachFCHDR_GCMND*); |
| 999 | |
| 1000 | static void ProcessELS_Reply( CPQFCHBA*,TachFCHDR_GCMND*); |
| 1001 | |
| 1002 | static void ProcessFCS_Reply( CPQFCHBA*,TachFCHDR_GCMND*); |
| 1003 | |
| 1004 | void cpqfcTSImplicitLogout( CPQFCHBA* cpqfcHBAdata, |
| 1005 | PFC_LOGGEDIN_PORT pFcPort) |
| 1006 | { |
| 1007 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1008 | |
| 1009 | if( pFcPort->port_id != 0xFFFC01 ) // don't care about Fabric |
| 1010 | { |
| 1011 | fcChip->fcStats.logouts++; |
| 1012 | printk("cpqfcTS: Implicit logout of WWN %08X%08X, port_id %06X\n", |
| 1013 | (ULONG)pFcPort->u.liWWN, |
| 1014 | (ULONG)(pFcPort->u.liWWN >>32), |
| 1015 | pFcPort->port_id); |
| 1016 | |
| 1017 | // Terminate I/O with this (Linux) Scsi target |
| 1018 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1019 | &pFcPort->ScsiNexus, |
| 1020 | DEVICE_REMOVED); |
| 1021 | } |
| 1022 | |
| 1023 | // Do an "implicit logout" - we can't really Logout the device |
| 1024 | // (i.e. with LOGOut Request) because of port_id confusion |
| 1025 | // (i.e. the Other port has no port_id). |
| 1026 | // A new login for that WWN will have to re-write port_id (0 invalid) |
| 1027 | pFcPort->port_id = 0; // invalid! |
| 1028 | pFcPort->pdisc = FALSE; |
| 1029 | pFcPort->prli = FALSE; |
| 1030 | pFcPort->plogi = FALSE; |
| 1031 | pFcPort->flogi = FALSE; |
| 1032 | pFcPort->LOGO_timer = 0; |
| 1033 | pFcPort->device_blocked = TRUE; // block Scsi Requests |
| 1034 | pFcPort->ScsiNexus.VolumeSetAddressing=0; |
| 1035 | } |
| 1036 | |
| 1037 | |
| 1038 | // On FC-AL, there is a chance that a previously known device can |
| 1039 | // be quietly removed (e.g. with non-managed hub), |
| 1040 | // while a NEW device (with different WWN) took the same alpa or |
| 1041 | // even 24-bit port_id. This chance is unlikely but we must always |
| 1042 | // check for it. |
| 1043 | static void TestDuplicatePortId( CPQFCHBA* cpqfcHBAdata, |
| 1044 | PFC_LOGGEDIN_PORT pLoggedInPort) |
| 1045 | { |
| 1046 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1047 | // set "other port" at beginning of fcPorts list |
| 1048 | PFC_LOGGEDIN_PORT pOtherPortWithPortId = fcChip->fcPorts.pNextPort; |
| 1049 | while( pOtherPortWithPortId ) |
| 1050 | { |
| 1051 | if( (pOtherPortWithPortId->port_id == |
| 1052 | pLoggedInPort->port_id) |
| 1053 | && |
| 1054 | (pOtherPortWithPortId != pLoggedInPort) ) |
| 1055 | { |
| 1056 | // trouble! (Implicitly) Log the other guy out |
| 1057 | printk(" *port_id %Xh is duplicated!* ", |
| 1058 | pOtherPortWithPortId->port_id); |
| 1059 | cpqfcTSImplicitLogout( cpqfcHBAdata, pOtherPortWithPortId); |
| 1060 | } |
| 1061 | pOtherPortWithPortId = pOtherPortWithPortId->pNextPort; |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | |
| 1066 | |
| 1067 | |
| 1068 | |
| 1069 | |
| 1070 | // Dynamic Memory Allocation for newly discovered FC Ports. |
| 1071 | // For simplicity, maintain fcPorts structs for ALL |
| 1072 | // for discovered devices, including those we never do I/O with |
| 1073 | // (e.g. Fabric addresses) |
| 1074 | |
| 1075 | static PFC_LOGGEDIN_PORT CreateFcPort( |
| 1076 | CPQFCHBA* cpqfcHBAdata, |
| 1077 | PFC_LOGGEDIN_PORT pLastLoggedInPort, |
| 1078 | TachFCHDR_GCMND* fchs, |
| 1079 | LOGIN_PAYLOAD* plogi) |
| 1080 | { |
| 1081 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1082 | PFC_LOGGEDIN_PORT pNextLoggedInPort = NULL; |
| 1083 | int i; |
| 1084 | |
| 1085 | |
| 1086 | printk("cpqfcTS: New FC port %06Xh WWN: ", fchs->s_id); |
| 1087 | for( i=3; i>=0; i--) // copy the LOGIN port's WWN |
| 1088 | printk("%02X", plogi->port_name[i]); |
| 1089 | for( i=7; i>3; i--) // copy the LOGIN port's WWN |
| 1090 | printk("%02X", plogi->port_name[i]); |
| 1091 | |
| 1092 | |
| 1093 | // allocate mem for new port |
| 1094 | // (these are small and rare allocations...) |
| 1095 | pNextLoggedInPort = kmalloc( sizeof( FC_LOGGEDIN_PORT), GFP_ATOMIC ); |
| 1096 | |
| 1097 | |
| 1098 | // allocation succeeded? Fill out NEW PORT |
| 1099 | if( pNextLoggedInPort ) |
| 1100 | { |
| 1101 | // clear out any garbage (sometimes exists) |
| 1102 | memset( pNextLoggedInPort, 0, sizeof( FC_LOGGEDIN_PORT)); |
| 1103 | |
| 1104 | |
| 1105 | // If we login to a Fabric, we don't want to treat it |
| 1106 | // as a SCSI device... |
| 1107 | if( (fchs->s_id & 0xFFF000) != 0xFFF000) |
| 1108 | { |
| 1109 | int i; |
| 1110 | |
| 1111 | // create a unique "virtual" SCSI Nexus (for now, just a |
| 1112 | // new target ID) -- we will update channel/target on REPORT_LUNS |
| 1113 | // special case for very first SCSI target... |
| 1114 | if( cpqfcHBAdata->HostAdapter->max_id == 0) |
| 1115 | { |
| 1116 | pNextLoggedInPort->ScsiNexus.target = 0; |
| 1117 | fcChip->fcPorts.ScsiNexus.target = -1; // don't use "stub" |
| 1118 | } |
| 1119 | else |
| 1120 | { |
| 1121 | pNextLoggedInPort->ScsiNexus.target = |
| 1122 | cpqfcHBAdata->HostAdapter->max_id; |
| 1123 | } |
| 1124 | |
| 1125 | // initialize the lun[] Nexus struct for lun masking |
| 1126 | for( i=0; i< CPQFCTS_MAX_LUN; i++) |
| 1127 | pNextLoggedInPort->ScsiNexus.lun[i] = 0xFF; // init to NOT USED |
| 1128 | |
| 1129 | pNextLoggedInPort->ScsiNexus.channel = 0; // cpqfcTS has 1 FC port |
| 1130 | |
| 1131 | printk(" SCSI Chan/Trgt %d/%d", |
| 1132 | pNextLoggedInPort->ScsiNexus.channel, |
| 1133 | pNextLoggedInPort->ScsiNexus.target); |
| 1134 | |
| 1135 | // tell Scsi layers about the new target... |
| 1136 | cpqfcHBAdata->HostAdapter->max_id++; |
| 1137 | // printk("HostAdapter->max_id = %d\n", |
| 1138 | // cpqfcHBAdata->HostAdapter->max_id); |
| 1139 | } |
| 1140 | else |
| 1141 | { |
| 1142 | // device is NOT SCSI (in case of Fabric) |
| 1143 | pNextLoggedInPort->ScsiNexus.target = -1; // invalid |
| 1144 | } |
| 1145 | |
| 1146 | // create forward link to new port |
| 1147 | pLastLoggedInPort->pNextPort = pNextLoggedInPort; |
| 1148 | printk("\n"); |
| 1149 | |
| 1150 | } |
| 1151 | return pNextLoggedInPort; // NULL on allocation failure |
| 1152 | } // end NEW PORT (WWN) logic |
| 1153 | |
| 1154 | |
| 1155 | |
| 1156 | // For certain cases, we want to terminate exchanges without |
| 1157 | // sending ABTS to the device. Examples include when an FC |
| 1158 | // device changed it's port_id after Loop re-init, or when |
| 1159 | // the device sent us a logout. In the case of changed port_id, |
| 1160 | // we want to complete the command and return SOFT_ERROR to |
| 1161 | // force a re-try. In the case of LOGOut, we might return |
| 1162 | // BAD_TARGET if the device is really gone. |
| 1163 | // Since we must ensure that Tachyon is not operating on the |
| 1164 | // exchange, we have to freeze the chip |
| 1165 | // sterminateex |
| 1166 | void cpqfcTSTerminateExchange( |
| 1167 | CPQFCHBA* cpqfcHBAdata, SCSI_NEXUS *ScsiNexus, int TerminateStatus) |
| 1168 | { |
| 1169 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1170 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 1171 | ULONG x_ID; |
| 1172 | |
| 1173 | if( ScsiNexus ) |
| 1174 | { |
| 1175 | // printk("TerminateExchange: ScsiNexus chan/target %d/%d\n", |
| 1176 | // ScsiNexus->channel, ScsiNexus->target); |
| 1177 | |
| 1178 | } |
| 1179 | |
| 1180 | for( x_ID = 0; x_ID < TACH_SEST_LEN; x_ID++) |
| 1181 | { |
| 1182 | if( Exchanges->fcExchange[x_ID].type ) // in use? |
| 1183 | { |
| 1184 | if( ScsiNexus == NULL ) // our HBA changed - term. all |
| 1185 | { |
| 1186 | Exchanges->fcExchange[x_ID].status = TerminateStatus; |
| 1187 | cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &x_ID ); |
| 1188 | } |
| 1189 | else |
| 1190 | { |
| 1191 | // If a device, according to WWN, has been removed, it's |
| 1192 | // port_id may be used by another working device, so we |
| 1193 | // have to terminate by SCSI target, NOT port_id. |
| 1194 | if( Exchanges->fcExchange[x_ID].Cmnd) // Cmnd in progress? |
| 1195 | { |
| 1196 | if( (Exchanges->fcExchange[x_ID].Cmnd->device->id == ScsiNexus->target) |
| 1197 | && |
| 1198 | (Exchanges->fcExchange[x_ID].Cmnd->device->channel == ScsiNexus->channel)) |
| 1199 | { |
| 1200 | Exchanges->fcExchange[x_ID].status = TerminateStatus; |
| 1201 | cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &x_ID ); // timed-out |
| 1202 | } |
| 1203 | } |
| 1204 | |
| 1205 | // (in case we ever need it...) |
| 1206 | // all SEST structures have a remote node ID at SEST DWORD 2 |
| 1207 | // if( (fcChip->SEST->u[ x_ID ].TWE.Remote_Node_ID >> 8) |
| 1208 | // == port_id) |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | } |
| 1213 | |
| 1214 | |
| 1215 | static void ProcessELS_Request( |
| 1216 | CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs) |
| 1217 | { |
| 1218 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1219 | // FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 1220 | // ULONG ox_id = (fchs->ox_rx_id >>16); |
| 1221 | PFC_LOGGEDIN_PORT pLoggedInPort=NULL, pLastLoggedInPort; |
| 1222 | BOOLEAN NeedReject = FALSE; |
| 1223 | ULONG ls_reject_code = 0; // default don'n know?? |
| 1224 | |
| 1225 | |
| 1226 | // Check the incoming frame for a supported ELS type |
| 1227 | switch( fchs->pl[0] & 0xFFFF) |
| 1228 | { |
| 1229 | case 0x0050: // PDISC? |
| 1230 | |
| 1231 | // Payload for PLOGI and PDISC is identical (request & reply) |
| 1232 | if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) // valid payload? |
| 1233 | { |
| 1234 | LOGIN_PAYLOAD logi; // FC-PH Port Login |
| 1235 | |
| 1236 | // PDISC payload OK. If critical login fields |
| 1237 | // (e.g. WWN) matches last login for this port_id, |
| 1238 | // we may resume any prior exchanges |
| 1239 | // with the other port |
| 1240 | |
| 1241 | |
| 1242 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi)); |
| 1243 | |
| 1244 | pLoggedInPort = fcFindLoggedInPort( |
| 1245 | fcChip, |
| 1246 | NULL, // don't search Scsi Nexus |
| 1247 | 0, // don't search linked list for port_id |
| 1248 | &logi.port_name[0], // search linked list for WWN |
| 1249 | &pLastLoggedInPort); // must return non-NULL; when a port_id |
| 1250 | // is not found, this pointer marks the |
| 1251 | // end of the singly linked list |
| 1252 | |
| 1253 | if( pLoggedInPort != NULL) // WWN found (prior login OK) |
| 1254 | { |
| 1255 | |
| 1256 | if( (fchs->s_id & 0xFFFFFF) == pLoggedInPort->port_id) |
| 1257 | { |
| 1258 | // Yes. We were expecting PDISC? |
| 1259 | if( pLoggedInPort->pdisc ) |
| 1260 | { |
| 1261 | // Yes; set fields accordingly. (PDISC, not Originator) |
| 1262 | SetLoginFields( pLoggedInPort, fchs, TRUE, FALSE); |
| 1263 | |
| 1264 | // send 'ACC' reply |
| 1265 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1266 | ELS_PLOGI_ACC, // (PDISC same as PLOGI ACC) |
| 1267 | fchs ); |
| 1268 | |
| 1269 | // OK to resume I/O... |
| 1270 | } |
| 1271 | else |
| 1272 | { |
| 1273 | printk("Not expecting PDISC (pdisc=FALSE)\n"); |
| 1274 | NeedReject = TRUE; |
| 1275 | // set reject reason code |
| 1276 | ls_reject_code = |
| 1277 | LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR); |
| 1278 | } |
| 1279 | } |
| 1280 | else |
| 1281 | { |
| 1282 | if( pLoggedInPort->port_id != 0) |
| 1283 | { |
| 1284 | printk("PDISC PortID change: old %Xh, new %Xh\n", |
| 1285 | pLoggedInPort->port_id, fchs->s_id &0xFFFFFF); |
| 1286 | } |
| 1287 | NeedReject = TRUE; |
| 1288 | // set reject reason code |
| 1289 | ls_reject_code = |
| 1290 | LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR); |
| 1291 | |
| 1292 | } |
| 1293 | } |
| 1294 | else |
| 1295 | { |
| 1296 | printk("PDISC Request from unknown WWN\n"); |
| 1297 | NeedReject = TRUE; |
| 1298 | |
| 1299 | // set reject reason code |
| 1300 | ls_reject_code = |
| 1301 | LS_RJT_REASON( LOGICAL_ERROR, INVALID_PORT_NAME); |
| 1302 | } |
| 1303 | |
| 1304 | } |
| 1305 | else // Payload unacceptable |
| 1306 | { |
| 1307 | printk("payload unacceptable\n"); |
| 1308 | NeedReject = TRUE; // reject code already set |
| 1309 | |
| 1310 | } |
| 1311 | |
| 1312 | if( NeedReject) |
| 1313 | { |
| 1314 | ULONG port_id; |
| 1315 | // The PDISC failed. Set login struct flags accordingly, |
| 1316 | // terminate any I/O to this port, and Q a PLOGI |
| 1317 | if( pLoggedInPort ) |
| 1318 | { |
| 1319 | pLoggedInPort->pdisc = FALSE; |
| 1320 | pLoggedInPort->prli = FALSE; |
| 1321 | pLoggedInPort->plogi = FALSE; |
| 1322 | |
| 1323 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1324 | &pLoggedInPort->ScsiNexus, PORTID_CHANGED); |
| 1325 | port_id = pLoggedInPort->port_id; |
| 1326 | } |
| 1327 | else |
| 1328 | { |
| 1329 | port_id = fchs->s_id &0xFFFFFF; |
| 1330 | } |
| 1331 | fchs->reserved = ls_reject_code; // borrow this (unused) field |
| 1332 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_RJT, fchs ); |
| 1333 | } |
| 1334 | |
| 1335 | break; |
| 1336 | |
| 1337 | |
| 1338 | |
| 1339 | case 0x0003: // PLOGI? |
| 1340 | |
| 1341 | // Payload for PLOGI and PDISC is identical (request & reply) |
| 1342 | if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) // valid payload? |
| 1343 | { |
| 1344 | LOGIN_PAYLOAD logi; // FC-PH Port Login |
| 1345 | BOOLEAN NeedReject = FALSE; |
| 1346 | |
| 1347 | // PDISC payload OK. If critical login fields |
| 1348 | // (e.g. WWN) matches last login for this port_id, |
| 1349 | // we may resume any prior exchanges |
| 1350 | // with the other port |
| 1351 | |
| 1352 | |
| 1353 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi)); |
| 1354 | |
| 1355 | pLoggedInPort = fcFindLoggedInPort( |
| 1356 | fcChip, |
| 1357 | NULL, // don't search Scsi Nexus |
| 1358 | 0, // don't search linked list for port_id |
| 1359 | &logi.port_name[0], // search linked list for WWN |
| 1360 | &pLastLoggedInPort); // must return non-NULL; when a port_id |
| 1361 | // is not found, this pointer marks the |
| 1362 | // end of the singly linked list |
| 1363 | |
| 1364 | if( pLoggedInPort == NULL) // WWN not found -New Port |
| 1365 | { |
| 1366 | pLoggedInPort = CreateFcPort( |
| 1367 | cpqfcHBAdata, |
| 1368 | pLastLoggedInPort, |
| 1369 | fchs, |
| 1370 | &logi); |
| 1371 | if( pLoggedInPort == NULL ) |
| 1372 | { |
| 1373 | printk(" cpqfcTS: New port allocation failed - lost FC device!\n"); |
| 1374 | // Now Q a LOGOut Request, since we won't be talking to that device |
| 1375 | |
| 1376 | NeedReject = TRUE; |
| 1377 | |
| 1378 | // set reject reason code |
| 1379 | ls_reject_code = |
| 1380 | LS_RJT_REASON( LOGICAL_ERROR, NO_LOGIN_RESOURCES); |
| 1381 | |
| 1382 | } |
| 1383 | } |
| 1384 | if( !NeedReject ) |
| 1385 | { |
| 1386 | |
| 1387 | // OK - we have valid fcPort ptr; set fields accordingly. |
| 1388 | // (not PDISC, not Originator) |
| 1389 | SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE); |
| 1390 | |
| 1391 | // send 'ACC' reply |
| 1392 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1393 | ELS_PLOGI_ACC, // (PDISC same as PLOGI ACC) |
| 1394 | fchs ); |
| 1395 | } |
| 1396 | } |
| 1397 | else // Payload unacceptable |
| 1398 | { |
| 1399 | printk("payload unacceptable\n"); |
| 1400 | NeedReject = TRUE; // reject code already set |
| 1401 | } |
| 1402 | |
| 1403 | if( NeedReject) |
| 1404 | { |
| 1405 | // The PDISC failed. Set login struct flags accordingly, |
| 1406 | // terminate any I/O to this port, and Q a PLOGI |
| 1407 | pLoggedInPort->pdisc = FALSE; |
| 1408 | pLoggedInPort->prli = FALSE; |
| 1409 | pLoggedInPort->plogi = FALSE; |
| 1410 | |
| 1411 | fchs->reserved = ls_reject_code; // borrow this (unused) field |
| 1412 | |
| 1413 | // send 'RJT' reply |
| 1414 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_RJT, fchs ); |
| 1415 | } |
| 1416 | |
| 1417 | // terminate any exchanges with this device... |
| 1418 | if( pLoggedInPort ) |
| 1419 | { |
| 1420 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1421 | &pLoggedInPort->ScsiNexus, PORTID_CHANGED); |
| 1422 | } |
| 1423 | break; |
| 1424 | |
| 1425 | |
| 1426 | |
| 1427 | case 0x1020: // PRLI? |
| 1428 | { |
| 1429 | BOOLEAN NeedReject = TRUE; |
| 1430 | pLoggedInPort = fcFindLoggedInPort( |
| 1431 | fcChip, |
| 1432 | NULL, // don't search Scsi Nexus |
| 1433 | (fchs->s_id & 0xFFFFFF), // search linked list for port_id |
| 1434 | NULL, // DON'T search linked list for WWN |
| 1435 | NULL); // don't care |
| 1436 | |
| 1437 | if( pLoggedInPort == NULL ) |
| 1438 | { |
| 1439 | // huh? |
| 1440 | printk(" Unexpected PRLI Request -not logged in!\n"); |
| 1441 | |
| 1442 | // set reject reason code |
| 1443 | ls_reject_code = LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR); |
| 1444 | |
| 1445 | // Q a LOGOut here? |
| 1446 | } |
| 1447 | else |
| 1448 | { |
| 1449 | // verify the PRLI ACC payload |
| 1450 | if( !verify_PRLI( fchs, &ls_reject_code) ) |
| 1451 | { |
| 1452 | // PRLI Reply is acceptable; were we expecting it? |
| 1453 | if( pLoggedInPort->plogi ) |
| 1454 | { |
| 1455 | // yes, we expected the PRLI ACC (not PDISC; not Originator) |
| 1456 | SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE); |
| 1457 | |
| 1458 | // Q an ACCept Reply |
| 1459 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1460 | ELS_PRLI_ACC, |
| 1461 | fchs ); |
| 1462 | |
| 1463 | NeedReject = FALSE; |
| 1464 | } |
| 1465 | else |
| 1466 | { |
| 1467 | // huh? |
| 1468 | printk(" (unexpected) PRLI REQEST with plogi FALSE\n"); |
| 1469 | |
| 1470 | // set reject reason code |
| 1471 | ls_reject_code = LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR); |
| 1472 | |
| 1473 | // Q a LOGOut here? |
| 1474 | |
| 1475 | } |
| 1476 | } |
| 1477 | else |
| 1478 | { |
| 1479 | printk(" PRLI REQUEST payload failed verify\n"); |
| 1480 | // (reject code set by "verify") |
| 1481 | |
| 1482 | // Q a LOGOut here? |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | if( NeedReject ) |
| 1487 | { |
| 1488 | // Q a ReJecT Reply with reason code |
| 1489 | fchs->reserved = ls_reject_code; |
| 1490 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1491 | ELS_RJT, // Q Type |
| 1492 | fchs ); |
| 1493 | } |
| 1494 | } |
| 1495 | break; |
| 1496 | |
| 1497 | |
| 1498 | |
| 1499 | |
| 1500 | case 0x0005: // LOGOut? |
| 1501 | { |
| 1502 | // was this LOGOUT because we sent a ELS_PDISC to an FC device |
| 1503 | // with changed (or new) port_id, or does the port refuse |
| 1504 | // to communicate to us? |
| 1505 | // We maintain a logout counter - if we get 3 consecutive LOGOuts, |
| 1506 | // give up! |
| 1507 | LOGOUT_PAYLOAD logo; |
| 1508 | BOOLEAN GiveUpOnDevice = FALSE; |
| 1509 | ULONG ls_reject_code = 0; |
| 1510 | |
| 1511 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logo, sizeof(logo)); |
| 1512 | |
| 1513 | pLoggedInPort = fcFindLoggedInPort( |
| 1514 | fcChip, |
| 1515 | NULL, // don't search Scsi Nexus |
| 1516 | 0, // don't search linked list for port_id |
| 1517 | &logo.port_name[0], // search linked list for WWN |
| 1518 | NULL); // don't care about end of list |
| 1519 | |
| 1520 | if( pLoggedInPort ) // found the device? |
| 1521 | { |
| 1522 | // Q an ACC reply |
| 1523 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1524 | ELS_LOGO_ACC, // Q Type |
| 1525 | fchs ); // device to respond to |
| 1526 | |
| 1527 | // set login struct fields (LOGO_counter increment) |
| 1528 | SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE); |
| 1529 | |
| 1530 | // are we an Initiator? |
| 1531 | if( fcChip->Options.initiator) |
| 1532 | { |
| 1533 | // we're an Initiator, so check if we should |
| 1534 | // try (another?) login |
| 1535 | |
| 1536 | // Fabrics routinely log out from us after |
| 1537 | // getting device info - don't try to log them |
| 1538 | // back in. |
| 1539 | if( (fchs->s_id & 0xFFF000) == 0xFFF000 ) |
| 1540 | { |
| 1541 | ; // do nothing |
| 1542 | } |
| 1543 | else if( pLoggedInPort->LOGO_counter <= 3) |
| 1544 | { |
| 1545 | // try (another) login (PLOGI request) |
| 1546 | |
| 1547 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1548 | ELS_PLOGI, // Q Type |
| 1549 | fchs ); |
| 1550 | |
| 1551 | // Terminate I/O with "retry" potential |
| 1552 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1553 | &pLoggedInPort->ScsiNexus, |
| 1554 | PORTID_CHANGED); |
| 1555 | } |
| 1556 | else |
| 1557 | { |
| 1558 | printk(" Got 3 LOGOuts - terminating comm. with port_id %Xh\n", |
| 1559 | fchs->s_id &&0xFFFFFF); |
| 1560 | GiveUpOnDevice = TRUE; |
| 1561 | } |
| 1562 | } |
| 1563 | else |
| 1564 | { |
| 1565 | GiveUpOnDevice = TRUE; |
| 1566 | } |
| 1567 | |
| 1568 | |
| 1569 | if( GiveUpOnDevice == TRUE ) |
| 1570 | { |
| 1571 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1572 | &pLoggedInPort->ScsiNexus, |
| 1573 | DEVICE_REMOVED); |
| 1574 | } |
| 1575 | } |
| 1576 | else // we don't know this WWN! |
| 1577 | { |
| 1578 | // Q a ReJecT Reply with reason code |
| 1579 | fchs->reserved = ls_reject_code; |
| 1580 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1581 | ELS_RJT, // Q Type |
| 1582 | fchs ); |
| 1583 | } |
| 1584 | } |
| 1585 | break; |
| 1586 | |
| 1587 | |
| 1588 | |
| 1589 | |
| 1590 | // FABRIC only case |
| 1591 | case 0x0461: // ELS RSCN (Registered State Change Notification)? |
| 1592 | { |
| 1593 | int Ports; |
| 1594 | int i; |
| 1595 | __u32 Buff; |
| 1596 | // Typically, one or more devices have been added to or dropped |
| 1597 | // from the Fabric. |
| 1598 | // The format of this frame is defined in FC-FLA (Rev 2.7, Aug 1997) |
| 1599 | // The first 32-bit word has a 2-byte Payload Length, which |
| 1600 | // includes the 4 bytes of the first word. Consequently, |
| 1601 | // this PL len must never be less than 4, must be a multiple of 4, |
| 1602 | // and has a specified max value 256. |
| 1603 | // (Endianess!) |
| 1604 | Ports = ((fchs->pl[0] >>24) - 4) / 4; |
| 1605 | Ports = Ports > 63 ? 63 : Ports; |
| 1606 | |
| 1607 | printk(" RSCN ports: %d\n", Ports); |
| 1608 | if( Ports <= 0 ) // huh? |
| 1609 | { |
| 1610 | // ReJecT the command |
| 1611 | fchs->reserved = LS_RJT_REASON( UNABLE_TO_PERFORM, 0); |
| 1612 | |
| 1613 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1614 | ELS_RJT, // Q Type |
| 1615 | fchs ); |
| 1616 | |
| 1617 | break; |
| 1618 | } |
| 1619 | else // Accept the command |
| 1620 | { |
| 1621 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1622 | ELS_ACC, // Q Type |
| 1623 | fchs ); |
| 1624 | } |
| 1625 | |
| 1626 | // Check the "address format" to determine action. |
| 1627 | // We have 3 cases: |
| 1628 | // 0 = Port Address; 24-bit address of affected device |
| 1629 | // 1 = Area Address; MS 16 bits valid |
| 1630 | // 2 = Domain Address; MS 8 bits valid |
| 1631 | for( i=0; i<Ports; i++) |
| 1632 | { |
| 1633 | BigEndianSwap( (UCHAR*)&fchs->pl[i+1],(UCHAR*)&Buff, 4); |
| 1634 | switch( Buff & 0xFF000000) |
| 1635 | { |
| 1636 | |
| 1637 | case 0: // Port Address? |
| 1638 | |
| 1639 | case 0x01000000: // Area Domain? |
| 1640 | case 0x02000000: // Domain Address |
| 1641 | // For example, "port_id" 0x201300 |
| 1642 | // OK, let's try a Name Service Request (Query) |
| 1643 | fchs->s_id = 0xFFFFFC; // Name Server Address |
| 1644 | cpqfcTSPutLinkQue( cpqfcHBAdata, FCS_NSR, fchs); |
| 1645 | |
| 1646 | break; |
| 1647 | |
| 1648 | |
| 1649 | default: // huh? new value on version change? |
| 1650 | break; |
| 1651 | } |
| 1652 | } |
| 1653 | } |
| 1654 | break; |
| 1655 | |
| 1656 | |
| 1657 | |
| 1658 | |
| 1659 | default: // don't support this request (yet) |
| 1660 | // set reject reason code |
| 1661 | fchs->reserved = LS_RJT_REASON( UNABLE_TO_PERFORM, |
| 1662 | REQUEST_NOT_SUPPORTED); |
| 1663 | |
| 1664 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1665 | ELS_RJT, // Q Type |
| 1666 | fchs ); |
| 1667 | break; |
| 1668 | } |
| 1669 | } |
| 1670 | |
| 1671 | |
| 1672 | static void ProcessELS_Reply( |
| 1673 | CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs) |
| 1674 | { |
| 1675 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 1676 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 1677 | ULONG ox_id = (fchs->ox_rx_id >>16); |
| 1678 | ULONG ls_reject_code; |
| 1679 | PFC_LOGGEDIN_PORT pLoggedInPort, pLastLoggedInPort; |
| 1680 | |
| 1681 | // If this is a valid reply, then we MUST have sent a request. |
| 1682 | // Verify that we can find a valid request OX_ID corresponding to |
| 1683 | // this reply |
| 1684 | |
| 1685 | |
| 1686 | if( Exchanges->fcExchange[(fchs->ox_rx_id >>16)].type == 0) |
| 1687 | { |
| 1688 | printk(" *Discarding ACC/RJT frame, xID %04X/%04X* ", |
| 1689 | ox_id, fchs->ox_rx_id & 0xffff); |
| 1690 | goto Quit; // exit this routine |
| 1691 | } |
| 1692 | |
| 1693 | |
| 1694 | // Is the reply a RJT (reject)? |
| 1695 | if( (fchs->pl[0] & 0xFFFFL) == 0x01) // Reject reply? |
| 1696 | { |
| 1697 | // ****** REJECT REPLY ******** |
| 1698 | switch( Exchanges->fcExchange[ox_id].type ) |
| 1699 | { |
| 1700 | |
| 1701 | case ELS_FDISC: // we sent out Fabric Discovery |
| 1702 | case ELS_FLOGI: // we sent out FLOGI |
| 1703 | |
| 1704 | printk("RJT received on Fabric Login from %Xh, reason %Xh\n", |
| 1705 | fchs->s_id, fchs->pl[1]); |
| 1706 | |
| 1707 | break; |
| 1708 | |
| 1709 | default: |
| 1710 | break; |
| 1711 | } |
| 1712 | |
| 1713 | goto Done; |
| 1714 | } |
| 1715 | |
| 1716 | // OK, we have an ACCept... |
| 1717 | // What's the ACC type? (according to what we sent) |
| 1718 | switch( Exchanges->fcExchange[ox_id].type ) |
| 1719 | { |
| 1720 | |
| 1721 | case ELS_PLOGI: // we sent out PLOGI |
| 1722 | if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) |
| 1723 | { |
| 1724 | LOGIN_PAYLOAD logi; // FC-PH Port Login |
| 1725 | |
| 1726 | // login ACC payload acceptable; search for WWN in our list |
| 1727 | // of fcPorts |
| 1728 | |
| 1729 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi)); |
| 1730 | |
| 1731 | pLoggedInPort = fcFindLoggedInPort( |
| 1732 | fcChip, |
| 1733 | NULL, // don't search Scsi Nexus |
| 1734 | 0, // don't search linked list for port_id |
| 1735 | &logi.port_name[0], // search linked list for WWN |
| 1736 | &pLastLoggedInPort); // must return non-NULL; when a port_id |
| 1737 | // is not found, this pointer marks the |
| 1738 | // end of the singly linked list |
| 1739 | |
| 1740 | if( pLoggedInPort == NULL) // WWN not found - new port |
| 1741 | { |
| 1742 | |
| 1743 | pLoggedInPort = CreateFcPort( |
| 1744 | cpqfcHBAdata, |
| 1745 | pLastLoggedInPort, |
| 1746 | fchs, |
| 1747 | &logi); |
| 1748 | |
| 1749 | if( pLoggedInPort == NULL ) |
| 1750 | { |
| 1751 | printk(" cpqfcTS: New port allocation failed - lost FC device!\n"); |
| 1752 | // Now Q a LOGOut Request, since we won't be talking to that device |
| 1753 | |
| 1754 | goto Done; // exit with error! dropped login frame |
| 1755 | } |
| 1756 | } |
| 1757 | else // WWN was already known. Ensure that any open |
| 1758 | // exchanges for this WWN are terminated. |
| 1759 | // NOTE: It's possible that a device can change its |
| 1760 | // 24-bit port_id after a Link init or Fabric change |
| 1761 | // (e.g. LIP or Fabric RSCN). In that case, the old |
| 1762 | // 24-bit port_id may be duplicated, or no longer exist. |
| 1763 | { |
| 1764 | |
| 1765 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1766 | &pLoggedInPort->ScsiNexus, PORTID_CHANGED); |
| 1767 | } |
| 1768 | |
| 1769 | // We have an fcPort struct - set fields accordingly |
| 1770 | // not PDISC, originator |
| 1771 | SetLoginFields( pLoggedInPort, fchs, FALSE, TRUE); |
| 1772 | |
| 1773 | // We just set a "port_id"; is it duplicated? |
| 1774 | TestDuplicatePortId( cpqfcHBAdata, pLoggedInPort); |
| 1775 | |
| 1776 | // For Fabric operation, we issued PLOGI to 0xFFFFFC |
| 1777 | // so we can send SCR (State Change Registration) |
| 1778 | // Check for this special case... |
| 1779 | if( fchs->s_id == 0xFFFFFC ) |
| 1780 | { |
| 1781 | // PLOGI ACC was a Fabric response... issue SCR |
| 1782 | fchs->s_id = 0xFFFFFD; // address for SCR |
| 1783 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_SCR, fchs); |
| 1784 | } |
| 1785 | |
| 1786 | else |
| 1787 | { |
| 1788 | // Now we need a PRLI to enable FCP-SCSI operation |
| 1789 | // set flags and Q up a ELS_PRLI |
| 1790 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PRLI, fchs); |
| 1791 | } |
| 1792 | } |
| 1793 | else |
| 1794 | { |
| 1795 | // login payload unacceptable - reason in ls_reject_code |
| 1796 | // Q up a Logout Request |
| 1797 | printk("Login Payload unacceptable\n"); |
| 1798 | |
| 1799 | } |
| 1800 | break; |
| 1801 | |
| 1802 | |
| 1803 | // PDISC logic very similar to PLOGI, except we never want |
| 1804 | // to allocate mem for "new" port, and we set flags differently |
| 1805 | // (might combine later with PLOGI logic for efficiency) |
| 1806 | case ELS_PDISC: // we sent out PDISC |
| 1807 | if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) |
| 1808 | { |
| 1809 | LOGIN_PAYLOAD logi; // FC-PH Port Login |
| 1810 | BOOLEAN NeedLogin = FALSE; |
| 1811 | |
| 1812 | // login payload acceptable; search for WWN in our list |
| 1813 | // of (previously seen) fcPorts |
| 1814 | |
| 1815 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi)); |
| 1816 | |
| 1817 | pLoggedInPort = fcFindLoggedInPort( |
| 1818 | fcChip, |
| 1819 | NULL, // don't search Scsi Nexus |
| 1820 | 0, // don't search linked list for port_id |
| 1821 | &logi.port_name[0], // search linked list for WWN |
| 1822 | &pLastLoggedInPort); // must return non-NULL; when a port_id |
| 1823 | // is not found, this pointer marks the |
| 1824 | // end of the singly linked list |
| 1825 | |
| 1826 | if( pLoggedInPort != NULL) // WWN found? |
| 1827 | { |
| 1828 | // WWN has same port_id as last login? (Of course, a properly |
| 1829 | // working FC device should NEVER ACCept a PDISC if it's |
| 1830 | // port_id changed, but check just in case...) |
| 1831 | if( (fchs->s_id & 0xFFFFFF) == pLoggedInPort->port_id) |
| 1832 | { |
| 1833 | // Yes. We were expecting PDISC? |
| 1834 | if( pLoggedInPort->pdisc ) |
| 1835 | { |
| 1836 | int i; |
| 1837 | |
| 1838 | |
| 1839 | // PDISC expected -- set fields. (PDISC, Originator) |
| 1840 | SetLoginFields( pLoggedInPort, fchs, TRUE, TRUE); |
| 1841 | |
| 1842 | // We are ready to resume FCP-SCSI to this device... |
| 1843 | // Do we need to start anything that was Queued? |
| 1844 | |
| 1845 | for( i=0; i< TACH_SEST_LEN; i++) |
| 1846 | { |
| 1847 | // see if any exchange for this PDISC'd port was queued |
| 1848 | if( ((fchs->s_id &0xFFFFFF) == |
| 1849 | (Exchanges->fcExchange[i].fchs.d_id & 0xFFFFFF)) |
| 1850 | && |
| 1851 | (Exchanges->fcExchange[i].status & EXCHANGE_QUEUED)) |
| 1852 | { |
| 1853 | fchs->reserved = i; // copy ExchangeID |
| 1854 | // printk(" *Q x_ID %Xh after PDISC* ",i); |
| 1855 | |
| 1856 | cpqfcTSPutLinkQue( cpqfcHBAdata, EXCHANGE_QUEUED, fchs ); |
| 1857 | } |
| 1858 | } |
| 1859 | |
| 1860 | // Complete commands Q'd while we were waiting for Login |
| 1861 | |
| 1862 | UnblockScsiDevice( cpqfcHBAdata->HostAdapter, pLoggedInPort); |
| 1863 | } |
| 1864 | else |
| 1865 | { |
| 1866 | printk("Not expecting PDISC (pdisc=FALSE)\n"); |
| 1867 | NeedLogin = TRUE; |
| 1868 | } |
| 1869 | } |
| 1870 | else |
| 1871 | { |
| 1872 | printk("PDISC PortID change: old %Xh, new %Xh\n", |
| 1873 | pLoggedInPort->port_id, fchs->s_id &0xFFFFFF); |
| 1874 | NeedLogin = TRUE; |
| 1875 | |
| 1876 | } |
| 1877 | } |
| 1878 | else |
| 1879 | { |
| 1880 | printk("PDISC ACC from unknown WWN\n"); |
| 1881 | NeedLogin = TRUE; |
| 1882 | } |
| 1883 | |
| 1884 | if( NeedLogin) |
| 1885 | { |
| 1886 | |
| 1887 | // The PDISC failed. Set login struct flags accordingly, |
| 1888 | // terminate any I/O to this port, and Q a PLOGI |
| 1889 | if( pLoggedInPort ) // FC device previously known? |
| 1890 | { |
| 1891 | |
| 1892 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 1893 | ELS_LOGO, // Q Type |
| 1894 | fchs ); // has port_id to send to |
| 1895 | |
| 1896 | // There are a variety of error scenarios which can result |
| 1897 | // in PDISC failure, so as a catchall, add the check for |
| 1898 | // duplicate port_id. |
| 1899 | TestDuplicatePortId( cpqfcHBAdata, pLoggedInPort); |
| 1900 | |
| 1901 | // TriggerHBA( fcChip->Registers.ReMapMemBase, 0); |
| 1902 | pLoggedInPort->pdisc = FALSE; |
| 1903 | pLoggedInPort->prli = FALSE; |
| 1904 | pLoggedInPort->plogi = FALSE; |
| 1905 | |
| 1906 | cpqfcTSTerminateExchange( cpqfcHBAdata, |
| 1907 | &pLoggedInPort->ScsiNexus, PORTID_CHANGED); |
| 1908 | } |
| 1909 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PLOGI, fchs ); |
| 1910 | } |
| 1911 | } |
| 1912 | else |
| 1913 | { |
| 1914 | // login payload unacceptable - reason in ls_reject_code |
| 1915 | // Q up a Logout Request |
| 1916 | printk("ERROR: Login Payload unacceptable!\n"); |
| 1917 | |
| 1918 | } |
| 1919 | |
| 1920 | break; |
| 1921 | |
| 1922 | |
| 1923 | |
| 1924 | case ELS_PRLI: // we sent out PRLI |
| 1925 | |
| 1926 | |
| 1927 | pLoggedInPort = fcFindLoggedInPort( |
| 1928 | fcChip, |
| 1929 | NULL, // don't search Scsi Nexus |
| 1930 | (fchs->s_id & 0xFFFFFF), // search linked list for port_id |
| 1931 | NULL, // DON'T search linked list for WWN |
| 1932 | NULL); // don't care |
| 1933 | |
| 1934 | if( pLoggedInPort == NULL ) |
| 1935 | { |
| 1936 | // huh? |
| 1937 | printk(" Unexpected PRLI ACCept frame!\n"); |
| 1938 | |
| 1939 | // Q a LOGOut here? |
| 1940 | |
| 1941 | goto Done; |
| 1942 | } |
| 1943 | |
| 1944 | // verify the PRLI ACC payload |
| 1945 | if( !verify_PRLI( fchs, &ls_reject_code) ) |
| 1946 | { |
| 1947 | // PRLI Reply is acceptable; were we expecting it? |
| 1948 | if( pLoggedInPort->plogi ) |
| 1949 | { |
| 1950 | // yes, we expected the PRLI ACC (not PDISC; Originator) |
| 1951 | SetLoginFields( pLoggedInPort, fchs, FALSE, TRUE); |
| 1952 | |
| 1953 | // OK, let's send a REPORT_LUNS command to determine |
| 1954 | // whether VSA or PDA FCP-LUN addressing is used. |
| 1955 | |
| 1956 | cpqfcTSPutLinkQue( cpqfcHBAdata, SCSI_REPORT_LUNS, fchs ); |
| 1957 | |
| 1958 | // It's possible that a device we were talking to changed |
| 1959 | // port_id, and has logged back in. This function ensures |
| 1960 | // that I/O will resume. |
| 1961 | UnblockScsiDevice( cpqfcHBAdata->HostAdapter, pLoggedInPort); |
| 1962 | |
| 1963 | } |
| 1964 | else |
| 1965 | { |
| 1966 | // huh? |
| 1967 | printk(" (unexpected) PRLI ACCept with plogi FALSE\n"); |
| 1968 | |
| 1969 | // Q a LOGOut here? |
| 1970 | goto Done; |
| 1971 | } |
| 1972 | } |
| 1973 | else |
| 1974 | { |
| 1975 | printk(" PRLI ACCept payload failed verify\n"); |
| 1976 | |
| 1977 | // Q a LOGOut here? |
| 1978 | } |
| 1979 | |
| 1980 | break; |
| 1981 | |
| 1982 | case ELS_FLOGI: // we sent out FLOGI (Fabric Login) |
| 1983 | |
| 1984 | // update the upper 16 bits of our port_id in Tachyon |
| 1985 | // the switch adds those upper 16 bits when responding |
| 1986 | // to us (i.e. we are the destination_id) |
| 1987 | fcChip->Registers.my_al_pa = (fchs->d_id & 0xFFFFFF); |
| 1988 | writel( fcChip->Registers.my_al_pa, |
| 1989 | fcChip->Registers.ReMapMemBase + TL_MEM_TACH_My_ID); |
| 1990 | |
| 1991 | // now send out a PLOGI to the well known port_id 0xFFFFFC |
| 1992 | fchs->s_id = 0xFFFFFC; |
| 1993 | cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PLOGI, fchs); |
| 1994 | |
| 1995 | break; |
| 1996 | |
| 1997 | |
| 1998 | case ELS_FDISC: // we sent out FDISC (Fabric Discovery (Login)) |
| 1999 | |
| 2000 | printk( " ELS_FDISC success "); |
| 2001 | break; |
| 2002 | |
| 2003 | |
| 2004 | case ELS_SCR: // we sent out State Change Registration |
| 2005 | // now we can issue Name Service Request to find any |
| 2006 | // Fabric-connected devices we might want to login to. |
| 2007 | |
| 2008 | |
| 2009 | fchs->s_id = 0xFFFFFC; // Name Server Address |
| 2010 | cpqfcTSPutLinkQue( cpqfcHBAdata, FCS_NSR, fchs); |
| 2011 | |
| 2012 | |
| 2013 | break; |
| 2014 | |
| 2015 | |
| 2016 | default: |
| 2017 | printk(" *Discarding unknown ACC frame, xID %04X/%04X* ", |
| 2018 | ox_id, fchs->ox_rx_id & 0xffff); |
| 2019 | break; |
| 2020 | } |
| 2021 | |
| 2022 | |
| 2023 | Done: |
| 2024 | // Regardless of whether the Reply is valid or not, the |
| 2025 | // the exchange is done - complete |
| 2026 | cpqfcTSCompleteExchange(cpqfcHBAdata->PciDev, fcChip, (fchs->ox_rx_id >>16)); |
| 2027 | |
| 2028 | Quit: |
| 2029 | return; |
| 2030 | } |
| 2031 | |
| 2032 | |
| 2033 | |
| 2034 | |
| 2035 | |
| 2036 | |
| 2037 | // **************** Fibre Channel Services ************** |
| 2038 | // This is where we process the Directory (Name) Service Reply |
| 2039 | // to know which devices are on the Fabric |
| 2040 | |
| 2041 | static void ProcessFCS_Reply( |
| 2042 | CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs) |
| 2043 | { |
| 2044 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 2045 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 2046 | ULONG ox_id = (fchs->ox_rx_id >>16); |
| 2047 | // ULONG ls_reject_code; |
| 2048 | // PFC_LOGGEDIN_PORT pLoggedInPort, pLastLoggedInPort; |
| 2049 | |
| 2050 | // If this is a valid reply, then we MUST have sent a request. |
| 2051 | // Verify that we can find a valid request OX_ID corresponding to |
| 2052 | // this reply |
| 2053 | |
| 2054 | if( Exchanges->fcExchange[(fchs->ox_rx_id >>16)].type == 0) |
| 2055 | { |
| 2056 | printk(" *Discarding Reply frame, xID %04X/%04X* ", |
| 2057 | ox_id, fchs->ox_rx_id & 0xffff); |
| 2058 | goto Quit; // exit this routine |
| 2059 | } |
| 2060 | |
| 2061 | |
| 2062 | // OK, we were expecting it. Now check to see if it's a |
| 2063 | // "Name Service" Reply, and if so force a re-validation of |
| 2064 | // Fabric device logins (i.e. Start the login timeout and |
| 2065 | // send PDISC or PLOGI) |
| 2066 | // (Endianess Byte Swap?) |
| 2067 | if( fchs->pl[1] == 0x02FC ) // Name Service |
| 2068 | { |
| 2069 | // got a new (or NULL) list of Fabric attach devices... |
| 2070 | // Invalidate current logins |
| 2071 | |
| 2072 | PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts; |
| 2073 | while( pLoggedInPort ) // for all ports which are expecting |
| 2074 | // PDISC after the next LIP, set the |
| 2075 | // logoutTimer |
| 2076 | { |
| 2077 | |
| 2078 | if( (pLoggedInPort->port_id & 0xFFFF00) // Fabric device? |
| 2079 | && |
| 2080 | (pLoggedInPort->port_id != 0xFFFFFC) ) // NOT the F_Port |
| 2081 | { |
| 2082 | pLoggedInPort->LOGO_timer = 6; // what's the Fabric timeout?? |
| 2083 | // suspend any I/O in progress until |
| 2084 | // PDISC received... |
| 2085 | pLoggedInPort->prli = FALSE; // block FCP-SCSI commands |
| 2086 | } |
| 2087 | |
| 2088 | pLoggedInPort = pLoggedInPort->pNextPort; |
| 2089 | } |
| 2090 | |
| 2091 | if( fchs->pl[2] == 0x0280) // ACCept? |
| 2092 | { |
| 2093 | // Send PLOGI or PDISC to these Fabric devices |
| 2094 | SendLogins( cpqfcHBAdata, &fchs->pl[4] ); |
| 2095 | } |
| 2096 | |
| 2097 | |
| 2098 | // As of this writing, the only reason to reject is because NO |
| 2099 | // devices are left on the Fabric. We already started |
| 2100 | // "logged out" timers; if the device(s) don't come |
| 2101 | // back, we'll do the implicit logout in the heart beat |
| 2102 | // timer routine |
| 2103 | else // ReJecT |
| 2104 | { |
| 2105 | // this just means no Fabric device is visible at this instant |
| 2106 | } |
| 2107 | } |
| 2108 | |
| 2109 | // Regardless of whether the Reply is valid or not, the |
| 2110 | // the exchange is done - complete |
| 2111 | cpqfcTSCompleteExchange(cpqfcHBAdata->PciDev, fcChip, (fchs->ox_rx_id >>16)); |
| 2112 | |
| 2113 | Quit: |
| 2114 | return; |
| 2115 | } |
| 2116 | |
| 2117 | |
| 2118 | |
| 2119 | |
| 2120 | |
| 2121 | |
| 2122 | |
| 2123 | static void AnalyzeIncomingFrame( |
| 2124 | CPQFCHBA *cpqfcHBAdata, |
| 2125 | ULONG QNdx ) |
| 2126 | { |
| 2127 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 2128 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 2129 | PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ; |
| 2130 | TachFCHDR_GCMND* fchs = |
| 2131 | (TachFCHDR_GCMND*)fcLQ->Qitem[QNdx].ulBuff; |
| 2132 | // ULONG ls_reject_code; // reason for rejecting login |
| 2133 | LONG ExchangeID; |
| 2134 | // FC_LOGGEDIN_PORT *pLoggedInPort; |
| 2135 | BOOLEAN AbortAccept; |
| 2136 | |
| 2137 | ENTER("AnalyzeIncomingFrame"); |
| 2138 | |
| 2139 | |
| 2140 | |
| 2141 | switch( fcLQ->Qitem[QNdx].Type) // FCP or Unknown |
| 2142 | { |
| 2143 | |
| 2144 | case SFQ_UNKNOWN: // unknown frame (e.g. LIP position frame, NOP, etc.) |
| 2145 | |
| 2146 | |
| 2147 | // ********* FC-4 Device Data/ Fibre Channel Service ************* |
| 2148 | if( ((fchs->d_id &0xF0000000) == 0) // R_CTL (upper nibble) 0x0? |
| 2149 | && |
| 2150 | (fchs->f_ctl & 0x20000000) ) // TYPE 20h is Fibre Channel Service |
| 2151 | { |
| 2152 | |
| 2153 | // ************** FCS Reply ********************** |
| 2154 | |
| 2155 | if( (fchs->d_id & 0xff000000L) == 0x03000000L) // (31:23 R_CTL) |
| 2156 | { |
| 2157 | ProcessFCS_Reply( cpqfcHBAdata, fchs ); |
| 2158 | |
| 2159 | } // end of FCS logic |
| 2160 | |
| 2161 | } |
| 2162 | |
| 2163 | |
| 2164 | // *********** Extended Link Service ************** |
| 2165 | |
| 2166 | else if( fchs->d_id & 0x20000000 // R_CTL 0x2? |
| 2167 | && |
| 2168 | (fchs->f_ctl & 0x01000000) ) // TYPE = 1 |
| 2169 | { |
| 2170 | |
| 2171 | // these frames are either a response to |
| 2172 | // something we sent (0x23) or "unsolicited" |
| 2173 | // frames (0x22). |
| 2174 | |
| 2175 | |
| 2176 | // **************Extended Link REPLY ********************** |
| 2177 | // R_CTL Solicited Control Reply |
| 2178 | |
| 2179 | if( (fchs->d_id & 0xff000000L) == 0x23000000L) // (31:23 R_CTL) |
| 2180 | { |
| 2181 | |
| 2182 | ProcessELS_Reply( cpqfcHBAdata, fchs ); |
| 2183 | |
| 2184 | } // end of "R_CTL Solicited Control Reply" |
| 2185 | |
| 2186 | |
| 2187 | |
| 2188 | |
| 2189 | // **************Extended Link REQUEST ********************** |
| 2190 | // (unsolicited commands from another port or task...) |
| 2191 | |
| 2192 | // R_CTL Ext Link REQUEST |
| 2193 | else if( (fchs->d_id & 0xff000000L) == 0x22000000L && |
| 2194 | (fchs->ox_rx_id != 0xFFFFFFFFL) ) // (ignore LIP frame) |
| 2195 | { |
| 2196 | |
| 2197 | |
| 2198 | |
| 2199 | ProcessELS_Request( cpqfcHBAdata, fchs ); |
| 2200 | |
| 2201 | } |
| 2202 | |
| 2203 | |
| 2204 | |
| 2205 | // ************** LILP ********************** |
| 2206 | else if( (fchs->d_id & 0xff000000L) == 0x22000000L && |
| 2207 | (fchs->ox_rx_id == 0xFFFFFFFFL)) // (e.g., LIP frames) |
| 2208 | |
| 2209 | { |
| 2210 | // SANMark specifies that when available, we must use |
| 2211 | // the LILP frame to determine which ALPAs to send Port Discovery |
| 2212 | // to... |
| 2213 | |
| 2214 | if( fchs->pl[0] == 0x0711L) // ELS_PLOGI? |
| 2215 | { |
| 2216 | // UCHAR *ptr = (UCHAR*)&fchs->pl[1]; |
| 2217 | // printk(" %d ALPAs found\n", *ptr); |
| 2218 | memcpy( fcChip->LILPmap, &fchs->pl[1], 32*4); // 32 DWORDs |
| 2219 | fcChip->Options.LILPin = 1; // our LILPmap is valid! |
| 2220 | // now post to make Port Discovery happen... |
| 2221 | cpqfcTSPutLinkQue( cpqfcHBAdata, LINKACTIVE, fchs); |
| 2222 | } |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | |
| 2227 | // ***************** BASIC LINK SERVICE ***************** |
| 2228 | |
| 2229 | else if( fchs->d_id & 0x80000000 // R_CTL: |
| 2230 | && // Basic Link Service Request |
| 2231 | !(fchs->f_ctl & 0xFF000000) ) // type=0 for BLS |
| 2232 | { |
| 2233 | |
| 2234 | // Check for ABTS (Abort Sequence) |
| 2235 | if( (fchs->d_id & 0x8F000000) == 0x81000000) |
| 2236 | { |
| 2237 | // look for OX_ID, S_ID pair that matches in our |
| 2238 | // fcExchanges table; if found, reply with ACCept and complete |
| 2239 | // the exchange |
| 2240 | |
| 2241 | // Per PLDA, an ABTS is sent by an initiator; therefore |
| 2242 | // assume that if we have an exhange open to the port who |
| 2243 | // sent ABTS, it will be the d_id of what we sent. |
| 2244 | for( ExchangeID = 0, AbortAccept=FALSE; |
| 2245 | ExchangeID < TACH_SEST_LEN; ExchangeID++) |
| 2246 | { |
| 2247 | // Valid "target" exchange 24-bit port_id matches? |
| 2248 | // NOTE: For the case of handling Intiator AND Target |
| 2249 | // functions on the same chip, we can have TWO Exchanges |
| 2250 | // with the same OX_ID -- OX_ID/FFFF for the CMND, and |
| 2251 | // OX_ID/RX_ID for the XRDY or DATA frame(s). Ideally, |
| 2252 | // we would like to support ABTS from Initiators or Targets, |
| 2253 | // but it's not clear that can be supported on Tachyon for |
| 2254 | // all cases (requires more investigation). |
| 2255 | |
| 2256 | if( (Exchanges->fcExchange[ ExchangeID].type == SCSI_TWE || |
| 2257 | Exchanges->fcExchange[ ExchangeID].type == SCSI_TRE) |
| 2258 | && |
| 2259 | ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) == |
| 2260 | (fchs->s_id & 0xFFFFFF)) ) |
| 2261 | { |
| 2262 | |
| 2263 | // target xchnge port_id matches -- how about OX_ID? |
| 2264 | if( (Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id &0xFFFF0000) |
| 2265 | == (fchs->ox_rx_id & 0xFFFF0000) ) |
| 2266 | // yes! post ACCept response; will be completed by fcStart |
| 2267 | { |
| 2268 | Exchanges->fcExchange[ ExchangeID].status = TARGET_ABORT; |
| 2269 | |
| 2270 | // copy (add) rx_id field for simplified ACCept reply |
| 2271 | fchs->ox_rx_id = |
| 2272 | Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id; |
| 2273 | |
| 2274 | cpqfcTSPutLinkQue( cpqfcHBAdata, |
| 2275 | BLS_ABTS_ACC, // Q Type |
| 2276 | fchs ); // void QueContent |
| 2277 | AbortAccept = TRUE; |
| 2278 | printk("ACCepting ABTS for x_ID %8.8Xh, SEST pair %8.8Xh\n", |
| 2279 | fchs->ox_rx_id, Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id); |
| 2280 | break; // ABTS can affect only ONE exchange -exit loop |
| 2281 | } |
| 2282 | } |
| 2283 | } // end of FOR loop |
| 2284 | if( !AbortAccept ) // can't ACCept ABTS - send Reject |
| 2285 | { |
| 2286 | printk("ReJecTing: can't find ExchangeID %8.8Xh for ABTS command\n", |
| 2287 | fchs->ox_rx_id); |
| 2288 | if( Exchanges->fcExchange[ ExchangeID].type |
| 2289 | && |
| 2290 | !(fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len |
| 2291 | & 0x80000000)) |
| 2292 | { |
| 2293 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID); |
| 2294 | } |
| 2295 | else |
| 2296 | { |
| 2297 | printk("Unexpected ABTS ReJecT! SEST[%X] Dword 0: %Xh\n", |
| 2298 | ExchangeID, fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len); |
| 2299 | } |
| 2300 | } |
| 2301 | } |
| 2302 | |
| 2303 | // Check for BLS {ABTS? (Abort Sequence)} ACCept |
| 2304 | else if( (fchs->d_id & 0x8F000000) == 0x84000000) |
| 2305 | { |
| 2306 | // target has responded with ACC for our ABTS; |
| 2307 | // complete the indicated exchange with ABORTED status |
| 2308 | // Make no checks for correct RX_ID, since |
| 2309 | // all we need to conform ABTS ACC is the OX_ID. |
| 2310 | // Verify that the d_id matches! |
| 2311 | |
| 2312 | ExchangeID = (fchs->ox_rx_id >> 16) & 0x7FFF; // x_id from ACC |
| 2313 | // printk("ABTS ACC x_ID 0x%04X 0x%04X, status %Xh\n", |
| 2314 | // fchs->ox_rx_id >> 16, fchs->ox_rx_id & 0xffff, |
| 2315 | // Exchanges->fcExchange[ExchangeID].status); |
| 2316 | |
| 2317 | |
| 2318 | |
| 2319 | if( ExchangeID < TACH_SEST_LEN ) // x_ID makes sense |
| 2320 | { |
| 2321 | // Does "target" exchange 24-bit port_id match? |
| 2322 | // (See "NOTE" above for handling Intiator AND Target in |
| 2323 | // the same device driver) |
| 2324 | // First, if this is a target response, then we originated |
| 2325 | // (initiated) it with BLS_ABTS: |
| 2326 | |
| 2327 | if( (Exchanges->fcExchange[ ExchangeID].type == BLS_ABTS) |
| 2328 | |
| 2329 | && |
| 2330 | // Second, does the source of this ACC match the destination |
| 2331 | // of who we originally sent it to? |
| 2332 | ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) == |
| 2333 | (fchs->s_id & 0xFFFFFF)) ) |
| 2334 | { |
| 2335 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID ); |
| 2336 | } |
| 2337 | } |
| 2338 | } |
| 2339 | // Check for BLS {ABTS? (Abort Sequence)} ReJecT |
| 2340 | else if( (fchs->d_id & 0x8F000000) == 0x85000000) |
| 2341 | { |
| 2342 | // target has responded with RJT for our ABTS; |
| 2343 | // complete the indicated exchange with ABORTED status |
| 2344 | // Make no checks for correct RX_ID, since |
| 2345 | // all we need to conform ABTS ACC is the OX_ID. |
| 2346 | // Verify that the d_id matches! |
| 2347 | |
| 2348 | ExchangeID = (fchs->ox_rx_id >> 16) & 0x7FFF; // x_id from ACC |
| 2349 | // printk("BLS_ABTS RJT on Exchange 0x%04X 0x%04X\n", |
| 2350 | // fchs->ox_rx_id >> 16, fchs->ox_rx_id & 0xffff); |
| 2351 | |
| 2352 | if( ExchangeID < TACH_SEST_LEN ) // x_ID makes sense |
| 2353 | { |
| 2354 | // Does "target" exchange 24-bit port_id match? |
| 2355 | // (See "NOTE" above for handling Intiator AND Target in |
| 2356 | // the same device driver) |
| 2357 | // First, if this is a target response, then we originated |
| 2358 | // (initiated) it with BLS_ABTS: |
| 2359 | |
| 2360 | if( (Exchanges->fcExchange[ ExchangeID].type == BLS_ABTS) |
| 2361 | |
| 2362 | && |
| 2363 | // Second, does the source of this ACC match the destination |
| 2364 | // of who we originally sent it to? |
| 2365 | ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) == |
| 2366 | (fchs->s_id & 0xFFFFFF)) ) |
| 2367 | { |
| 2368 | // YES! NOTE: There is a bug in CPQ's RA-4000 box |
| 2369 | // where the "reason code" isn't returned in the payload |
| 2370 | // For now, simply presume the reject is because the target |
| 2371 | // already completed the exchange... |
| 2372 | |
| 2373 | // printk("complete x_ID %Xh on ABTS RJT\n", ExchangeID); |
| 2374 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID ); |
| 2375 | } |
| 2376 | } |
| 2377 | } // end of ABTS check |
| 2378 | } // end of Basic Link Service Request |
| 2379 | break; |
| 2380 | |
| 2381 | default: |
| 2382 | printk("AnalyzeIncomingFrame: unknown type: %Xh(%d)\n", |
| 2383 | fcLQ->Qitem[QNdx].Type, |
| 2384 | fcLQ->Qitem[QNdx].Type); |
| 2385 | break; |
| 2386 | } |
| 2387 | } |
| 2388 | |
| 2389 | |
| 2390 | // Function for Port Discovery necessary after every FC |
| 2391 | // initialization (e.g. LIP). |
| 2392 | // Also may be called if from Fabric Name Service logic. |
| 2393 | |
| 2394 | static void SendLogins( CPQFCHBA *cpqfcHBAdata, __u32 *FabricPortIds ) |
| 2395 | { |
| 2396 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 2397 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 2398 | ULONG ulStatus=0; |
| 2399 | TachFCHDR_GCMND fchs; // copy fields for transmission |
| 2400 | int i; |
| 2401 | ULONG loginType; |
| 2402 | LONG ExchangeID; |
| 2403 | PFC_LOGGEDIN_PORT pLoggedInPort; |
| 2404 | __u32 PortIds[ number_of_al_pa]; |
| 2405 | int NumberOfPorts=0; |
| 2406 | |
| 2407 | // We're going to presume (for now) that our limit of Fabric devices |
| 2408 | // is the same as the number of alpa on a private loop (126 devices). |
| 2409 | // (Of course this could be changed to support however many we have |
| 2410 | // memory for). |
| 2411 | memset( &PortIds[0], 0, sizeof(PortIds)); |
| 2412 | |
| 2413 | // First, check if this login is for our own Link Initialization |
| 2414 | // (e.g. LIP on FC-AL), or if we have knowledge of Fabric devices |
| 2415 | // from a switch. If we are logging into Fabric devices, we'll |
| 2416 | // have a non-NULL FabricPortId pointer |
| 2417 | |
| 2418 | if( FabricPortIds != NULL) // may need logins |
| 2419 | { |
| 2420 | int LastPort=FALSE; |
| 2421 | i = 0; |
| 2422 | while( !LastPort) |
| 2423 | { |
| 2424 | // port IDs From NSR payload; byte swap needed? |
| 2425 | BigEndianSwap( (UCHAR*)FabricPortIds, (UCHAR*)&PortIds[i], 4); |
| 2426 | |
| 2427 | // printk("FPortId[%d] %Xh ", i, PortIds[i]); |
| 2428 | if( PortIds[i] & 0x80000000) |
| 2429 | LastPort = TRUE; |
| 2430 | |
| 2431 | PortIds[i] &= 0xFFFFFF; // get 24-bit port_id |
| 2432 | // some non-Fabric devices (like the Crossroads Fibre/Scsi bridge) |
| 2433 | // erroneously use ALPA 0. |
| 2434 | if( PortIds[i] ) // need non-zero port_id... |
| 2435 | i++; |
| 2436 | |
| 2437 | if( i >= number_of_al_pa ) // (in)sanity check |
| 2438 | break; |
| 2439 | FabricPortIds++; // next... |
| 2440 | } |
| 2441 | |
| 2442 | NumberOfPorts = i; |
| 2443 | // printk("NumberOf Fabric ports %d", NumberOfPorts); |
| 2444 | } |
| 2445 | |
| 2446 | else // need to send logins on our "local" link |
| 2447 | { |
| 2448 | |
| 2449 | // are we a loop port? If so, check for reception of LILP frame, |
| 2450 | // and if received use it (SANMark requirement) |
| 2451 | if( fcChip->Options.LILPin ) |
| 2452 | { |
| 2453 | int j=0; |
| 2454 | // sanity check on number of ALPAs from LILP frame... |
| 2455 | // For format of LILP frame, see FC-AL specs or |
| 2456 | // "Fibre Channel Bench Reference", J. Stai, 1995 (ISBN 1-879936-17-8) |
| 2457 | // First byte is number of ALPAs |
| 2458 | i = fcChip->LILPmap[0] >= (32*4) ? 32*4 : fcChip->LILPmap[0]; |
| 2459 | NumberOfPorts = i; |
| 2460 | // printk(" LILP alpa count %d ", i); |
| 2461 | while( i > 0) |
| 2462 | { |
| 2463 | PortIds[j] = fcChip->LILPmap[1+ j]; |
| 2464 | j++; i--; |
| 2465 | } |
| 2466 | } |
| 2467 | else // have to send login to everybody |
| 2468 | { |
| 2469 | int j=0; |
| 2470 | i = number_of_al_pa; |
| 2471 | NumberOfPorts = i; |
| 2472 | while( i > 0) |
| 2473 | { |
| 2474 | PortIds[j] = valid_al_pa[j]; // all legal ALPAs |
| 2475 | j++; i--; |
| 2476 | } |
| 2477 | } |
| 2478 | } |
| 2479 | |
| 2480 | |
| 2481 | // Now we have a copy of the port_ids (and how many)... |
| 2482 | for( i = 0; i < NumberOfPorts; i++) |
| 2483 | { |
| 2484 | // 24-bit FC Port ID |
| 2485 | fchs.s_id = PortIds[i]; // note: only 8-bits used for ALPA |
| 2486 | |
| 2487 | |
| 2488 | // don't log into ourselves (Linux Scsi disk scan will stop on |
| 2489 | // no TARGET support error on us, and quit trying for rest of devices) |
| 2490 | if( (fchs.s_id & 0xFF ) == (fcChip->Registers.my_al_pa & 0xFF) ) |
| 2491 | continue; |
| 2492 | |
| 2493 | // fabric login needed? |
| 2494 | if( (fchs.s_id == 0) || |
| 2495 | (fcChip->Options.fabric == 1) ) |
| 2496 | { |
| 2497 | fcChip->Options.flogi = 1; // fabric needs longer for login |
| 2498 | // Do we need FLOGI or FDISC? |
| 2499 | pLoggedInPort = fcFindLoggedInPort( |
| 2500 | fcChip, |
| 2501 | NULL, // don't search SCSI Nexus |
| 2502 | 0xFFFFFC, // search linked list for Fabric port_id |
| 2503 | NULL, // don't search WWN |
| 2504 | NULL); // (don't care about end of list) |
| 2505 | |
| 2506 | if( pLoggedInPort ) // If found, we have prior experience with |
| 2507 | // this port -- check whether PDISC is needed |
| 2508 | { |
| 2509 | if( pLoggedInPort->flogi ) |
| 2510 | { |
| 2511 | // does the switch support FDISC?? (FLOGI for now...) |
| 2512 | loginType = ELS_FLOGI; // prior FLOGI still valid |
| 2513 | } |
| 2514 | else |
| 2515 | loginType = ELS_FLOGI; // expired FLOGI |
| 2516 | } |
| 2517 | else // first FLOGI? |
| 2518 | loginType = ELS_FLOGI; |
| 2519 | |
| 2520 | |
| 2521 | fchs.s_id = 0xFFFFFE; // well known F_Port address |
| 2522 | |
| 2523 | // Fabrics are not required to support FDISC, and |
| 2524 | // it's not clear if that helps us anyway, since |
| 2525 | // we'll want a Name Service Request to re-verify |
| 2526 | // visible devices... |
| 2527 | // Consequently, we always want our upper 16 bit |
| 2528 | // port_id to be zero (we'll be rejected if we |
| 2529 | // use our prior port_id if we've been plugged into |
| 2530 | // a different switch port). |
| 2531 | // Trick Tachyon to send to ALPA 0 (see TL/TS UG, pg 87) |
| 2532 | // If our ALPA is 55h for instance, we want the FC frame |
| 2533 | // s_id to be 0x000055, while Tach's my_al_pa register |
| 2534 | // must be 0x000155, to force an OPN at ALPA 0 |
| 2535 | // (the Fabric port) |
| 2536 | fcChip->Registers.my_al_pa &= 0xFF; // only use ALPA for FLOGI |
| 2537 | writel( fcChip->Registers.my_al_pa | 0x0100, |
| 2538 | fcChip->Registers.ReMapMemBase + TL_MEM_TACH_My_ID); |
| 2539 | } |
| 2540 | |
| 2541 | else // not FLOGI... |
| 2542 | { |
| 2543 | // should we send PLOGI or PDISC? Check if any prior port_id |
| 2544 | // (e.g. alpa) completed a PLOGI/PRLI exchange by checking |
| 2545 | // the pdisc flag. |
| 2546 | |
| 2547 | pLoggedInPort = fcFindLoggedInPort( |
| 2548 | fcChip, |
| 2549 | NULL, // don't search SCSI Nexus |
| 2550 | fchs.s_id, // search linked list for al_pa |
| 2551 | NULL, // don't search WWN |
| 2552 | NULL); // (don't care about end of list) |
| 2553 | |
| 2554 | |
| 2555 | |
| 2556 | if( pLoggedInPort ) // If found, we have prior experience with |
| 2557 | // this port -- check whether PDISC is needed |
| 2558 | { |
| 2559 | if( pLoggedInPort->pdisc ) |
| 2560 | { |
| 2561 | loginType = ELS_PDISC; // prior PLOGI and PRLI maybe still valid |
| 2562 | |
| 2563 | } |
| 2564 | else |
| 2565 | loginType = ELS_PLOGI; // prior knowledge, but can't use PDISC |
| 2566 | } |
| 2567 | else // never talked to this port_id before |
| 2568 | loginType = ELS_PLOGI; // prior knowledge, but can't use PDISC |
| 2569 | } |
| 2570 | |
| 2571 | |
| 2572 | |
| 2573 | ulStatus = cpqfcTSBuildExchange( |
| 2574 | cpqfcHBAdata, |
| 2575 | loginType, // e.g. PLOGI |
| 2576 | &fchs, // no incoming frame (we are originator) |
| 2577 | NULL, // no data (no scatter/gather list) |
| 2578 | &ExchangeID );// fcController->fcExchanges index, -1 if failed |
| 2579 | |
| 2580 | if( !ulStatus ) // Exchange setup OK? |
| 2581 | { |
| 2582 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID ); |
| 2583 | if( !ulStatus ) |
| 2584 | { |
| 2585 | // submitted to Tach's Outbound Que (ERQ PI incremented) |
| 2586 | // waited for completion for ELS type (Login frames issued |
| 2587 | // synchronously) |
| 2588 | |
| 2589 | if( loginType == ELS_PDISC ) |
| 2590 | { |
| 2591 | // now, we really shouldn't Revalidate SEST exchanges until |
| 2592 | // we get an ACC reply from our target and verify that |
| 2593 | // the target address/WWN is unchanged. However, when a fast |
| 2594 | // target gets the PDISC, they can send SEST Exchange data |
| 2595 | // before we even get around to processing the PDISC ACC. |
| 2596 | // Consequently, we lose the I/O. |
| 2597 | // To avoid this, go ahead and Revalidate when the PDISC goes |
| 2598 | // out, anticipating that the ACC will be truly acceptable |
| 2599 | // (this happens 99.9999....% of the time). |
| 2600 | // If we revalidate a SEST write, and write data goes to a |
| 2601 | // target that is NOT the one we originated the WRITE to, |
| 2602 | // that target is required (FCP-SCSI specs, etc) to discard |
| 2603 | // our WRITE data. |
| 2604 | |
| 2605 | // Re-validate SEST entries (Tachyon hardware assists) |
| 2606 | RevalidateSEST( cpqfcHBAdata->HostAdapter, pLoggedInPort); |
| 2607 | //TriggerHBA( fcChip->Registers.ReMapMemBase, 1); |
| 2608 | } |
| 2609 | } |
| 2610 | else // give up immediately on error |
| 2611 | { |
| 2612 | #ifdef LOGIN_DBG |
| 2613 | printk("SendLogins: fcStartExchange failed: %Xh\n", ulStatus ); |
| 2614 | #endif |
| 2615 | break; |
| 2616 | } |
| 2617 | |
| 2618 | |
| 2619 | if( fcChip->Registers.FMstatus.value & 0x080 ) // LDn during Port Disc. |
| 2620 | { |
| 2621 | ulStatus = LNKDWN_OSLS; |
| 2622 | #ifdef LOGIN_DBG |
| 2623 | printk("SendLogins: PortDisc aborted (LDn) @alpa %Xh\n", fchs.s_id); |
| 2624 | #endif |
| 2625 | break; |
| 2626 | } |
| 2627 | // Check the exchange for bad status (i.e. FrameTimeOut), |
| 2628 | // and complete on bad status (most likely due to BAD_ALPA) |
| 2629 | // on LDn, DPC function may already complete (ABORT) a started |
| 2630 | // exchange, so check type first (type = 0 on complete). |
| 2631 | if( Exchanges->fcExchange[ExchangeID].status ) |
| 2632 | { |
| 2633 | #ifdef LOGIN_DBG |
| 2634 | printk("completing x_ID %X on status %Xh\n", |
| 2635 | ExchangeID, Exchanges->fcExchange[ExchangeID].status); |
| 2636 | #endif |
| 2637 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID); |
| 2638 | } |
| 2639 | } |
| 2640 | else // Xchange setup failed... |
| 2641 | { |
| 2642 | #ifdef LOGIN_DBG |
| 2643 | printk("FC: cpqfcTSBuildExchange failed: %Xh\n", ulStatus ); |
| 2644 | #endif |
| 2645 | break; |
| 2646 | } |
| 2647 | } |
| 2648 | if( !ulStatus ) |
| 2649 | { |
| 2650 | // set the event signifying that all ALPAs were sent out. |
| 2651 | #ifdef LOGIN_DBG |
| 2652 | printk("SendLogins: PortDiscDone\n"); |
| 2653 | #endif |
| 2654 | cpqfcHBAdata->PortDiscDone = 1; |
| 2655 | |
| 2656 | |
| 2657 | // TL/TS UG, pg. 184 |
| 2658 | // 0x0065 = 100ms for RT_TOV |
| 2659 | // 0x01f5 = 500ms for ED_TOV |
| 2660 | fcChip->Registers.ed_tov.value = 0x006501f5L; |
| 2661 | writel( fcChip->Registers.ed_tov.value, |
| 2662 | (fcChip->Registers.ed_tov.address)); |
| 2663 | |
| 2664 | // set the LP_TOV back to ED_TOV (i.e. 500 ms) |
| 2665 | writel( 0x00000010, fcChip->Registers.ReMapMemBase +TL_MEM_FM_TIMEOUT2); |
| 2666 | } |
| 2667 | else |
| 2668 | { |
| 2669 | printk("SendLogins: failed at xchng %Xh, alpa %Xh, status %Xh\n", |
| 2670 | ExchangeID, fchs.s_id, ulStatus); |
| 2671 | } |
| 2672 | LEAVE("SendLogins"); |
| 2673 | |
| 2674 | } |
| 2675 | |
| 2676 | |
| 2677 | // for REPORT_LUNS documentation, see "In-Depth Exploration of Scsi", |
| 2678 | // D. Deming, 1994, pg 7-19 (ISBN 1-879936-08-9) |
| 2679 | static void ScsiReportLunsDone(Scsi_Cmnd *Cmnd) |
| 2680 | { |
| 2681 | struct Scsi_Host *HostAdapter = Cmnd->device->host; |
| 2682 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 2683 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 2684 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 2685 | PFC_LOGGEDIN_PORT pLoggedInPort; |
| 2686 | int LunListLen=0; |
| 2687 | int i; |
| 2688 | ULONG x_ID = 0xFFFFFFFF; |
| 2689 | UCHAR *ucBuff = Cmnd->request_buffer; |
| 2690 | |
| 2691 | // printk("cpqfcTS: ReportLunsDone \n"); |
| 2692 | // first, we need to find the Exchange for this command, |
| 2693 | // so we can find the fcPort struct to make the indicated |
| 2694 | // changes. |
| 2695 | for( i=0; i< TACH_SEST_LEN; i++) |
| 2696 | { |
| 2697 | if( Exchanges->fcExchange[i].type // exchange defined? |
| 2698 | && |
| 2699 | (Exchanges->fcExchange[i].Cmnd == Cmnd) ) // matches? |
| 2700 | |
| 2701 | { |
| 2702 | x_ID = i; // found exchange! |
| 2703 | break; |
| 2704 | } |
| 2705 | } |
| 2706 | if( x_ID == 0xFFFFFFFF) |
| 2707 | { |
| 2708 | // printk("cpqfcTS: ReportLuns failed - no FC Exchange\n"); |
| 2709 | goto Done; // Report Luns FC Exchange gone; |
| 2710 | // exchange probably Terminated by Implicit logout |
| 2711 | } |
| 2712 | |
| 2713 | |
| 2714 | // search linked list for the port_id we sent INQUIRY to |
| 2715 | pLoggedInPort = fcFindLoggedInPort( fcChip, |
| 2716 | NULL, // DON'T search Scsi Nexus (we will set it) |
| 2717 | Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF, |
| 2718 | NULL, // DON'T search linked list for FC WWN |
| 2719 | NULL); // DON'T care about end of list |
| 2720 | |
| 2721 | if( !pLoggedInPort ) |
| 2722 | { |
| 2723 | // printk("cpqfcTS: ReportLuns failed - device gone\n"); |
| 2724 | goto Done; // error! can't find logged in Port |
| 2725 | } |
| 2726 | LunListLen = ucBuff[3]; |
| 2727 | LunListLen += ucBuff[2]>>8; |
| 2728 | |
| 2729 | if( !LunListLen ) // failed |
| 2730 | { |
| 2731 | // generically speaking, a soft error means we should retry... |
| 2732 | if( (Cmnd->result >> 16) == DID_SOFT_ERROR ) |
| 2733 | { |
| 2734 | if( ((Cmnd->sense_buffer[2] & 0xF) == 0x6) && |
| 2735 | (Cmnd->sense_buffer[12] == 0x29) ) // Sense Code "reset" |
| 2736 | { |
| 2737 | TachFCHDR_GCMND *fchs = &Exchanges->fcExchange[ x_ID].fchs; |
| 2738 | // did we fail because of "check condition, device reset?" |
| 2739 | // e.g. the device was reset (i.e., at every power up) |
| 2740 | // retry the Report Luns |
| 2741 | |
| 2742 | // who are we sending it to? |
| 2743 | // we know this because we have a copy of the command |
| 2744 | // frame from the original Report Lun command - |
| 2745 | // switch the d_id/s_id fields, because the Exchange Build |
| 2746 | // context is "reply to source". |
| 2747 | |
| 2748 | fchs->s_id = fchs->d_id; // (temporarily re-use the struct) |
| 2749 | cpqfcTSPutLinkQue( cpqfcHBAdata, SCSI_REPORT_LUNS, fchs ); |
| 2750 | } |
| 2751 | } |
| 2752 | else // probably, the device doesn't support Report Luns |
| 2753 | pLoggedInPort->ScsiNexus.VolumeSetAddressing = 0; |
| 2754 | } |
| 2755 | else // we have LUN info - check VSA mode |
| 2756 | { |
| 2757 | // for now, assume all LUNs will have same addr mode |
| 2758 | // for VSA, payload byte 8 will be 0x40; otherwise, 0 |
| 2759 | pLoggedInPort->ScsiNexus.VolumeSetAddressing = ucBuff[8]; |
| 2760 | |
| 2761 | // Since we got a Report Luns answer, set lun masking flag |
| 2762 | pLoggedInPort->ScsiNexus.LunMasking = 1; |
| 2763 | |
| 2764 | if( LunListLen > 8*CPQFCTS_MAX_LUN) // We expect CPQFCTS_MAX_LUN max |
| 2765 | LunListLen = 8*CPQFCTS_MAX_LUN; |
| 2766 | |
| 2767 | /* |
| 2768 | printk("Device WWN %08X%08X Reports Luns @: ", |
| 2769 | (ULONG)(pLoggedInPort->u.liWWN &0xFFFFFFFF), |
| 2770 | (ULONG)(pLoggedInPort->u.liWWN>>32)); |
| 2771 | |
| 2772 | for( i=8; i<LunListLen+8; i+=8) |
| 2773 | { |
| 2774 | printk("%02X%02X ", ucBuff[i], ucBuff[i+1] ); |
| 2775 | } |
| 2776 | printk("\n"); |
| 2777 | */ |
| 2778 | |
| 2779 | // Since the device was kind enough to tell us where the |
| 2780 | // LUNs are, lets ensure they are contiguous for Linux's |
| 2781 | // SCSI driver scan, which expects them to start at 0. |
| 2782 | // Since Linux only supports 8 LUNs, only copy the first |
| 2783 | // eight from the report luns command |
| 2784 | |
| 2785 | // e.g., the Compaq RA4x00 f/w Rev 2.54 and above may report |
| 2786 | // LUNs 4001, 4004, etc., because other LUNs are masked from |
| 2787 | // this HBA (owned by someone else). We'll make those appear as |
| 2788 | // LUN 0, 1... to Linux |
| 2789 | { |
| 2790 | int j; |
| 2791 | int AppendLunList = 0; |
| 2792 | // Walk through the LUN list. The 'j' array number is |
| 2793 | // Linux's lun #, while the value of .lun[j] is the target's |
| 2794 | // lun #. |
| 2795 | // Once we build a LUN list, it's possible for a known device |
| 2796 | // to go offline while volumes (LUNs) are added. Later, |
| 2797 | // the device will do another PLOGI ... Report Luns command, |
| 2798 | // and we must not alter the existing Linux Lun map. |
| 2799 | // (This will be very rare). |
| 2800 | for( j=0; j < CPQFCTS_MAX_LUN; j++) |
| 2801 | { |
| 2802 | if( pLoggedInPort->ScsiNexus.lun[j] != 0xFF ) |
| 2803 | { |
| 2804 | AppendLunList = 1; |
| 2805 | break; |
| 2806 | } |
| 2807 | } |
| 2808 | if( AppendLunList ) |
| 2809 | { |
| 2810 | int k; |
| 2811 | int FreeLunIndex; |
| 2812 | // printk("cpqfcTS: AppendLunList\n"); |
| 2813 | |
| 2814 | // If we get a new Report Luns, we cannot change |
| 2815 | // any existing LUN mapping! (Only additive entry) |
| 2816 | // For all LUNs in ReportLun list |
| 2817 | // if RL lun != ScsiNexus lun |
| 2818 | // if RL lun present in ScsiNexus lun[], continue |
| 2819 | // else find ScsiNexus lun[]==FF and add, continue |
| 2820 | |
| 2821 | for( i=8, j=0; i<LunListLen+8 && j< CPQFCTS_MAX_LUN; i+=8, j++) |
| 2822 | { |
| 2823 | if( pLoggedInPort->ScsiNexus.lun[j] != ucBuff[i+1] ) |
| 2824 | { |
| 2825 | // something changed from the last Report Luns |
| 2826 | printk(" cpqfcTS: Report Lun change!\n"); |
| 2827 | for( k=0, FreeLunIndex=CPQFCTS_MAX_LUN; |
| 2828 | k < CPQFCTS_MAX_LUN; k++) |
| 2829 | { |
| 2830 | if( pLoggedInPort->ScsiNexus.lun[k] == 0xFF) |
| 2831 | { |
| 2832 | FreeLunIndex = k; |
| 2833 | break; |
| 2834 | } |
| 2835 | if( pLoggedInPort->ScsiNexus.lun[k] == ucBuff[i+1] ) |
| 2836 | break; // we already masked this lun |
| 2837 | } |
| 2838 | if( k >= CPQFCTS_MAX_LUN ) |
| 2839 | { |
| 2840 | printk(" no room for new LUN %d\n", ucBuff[i+1]); |
| 2841 | } |
| 2842 | else if( k == FreeLunIndex ) // need to add LUN |
| 2843 | { |
| 2844 | pLoggedInPort->ScsiNexus.lun[k] = ucBuff[i+1]; |
| 2845 | // printk("add [%d]->%02d\n", k, pLoggedInPort->ScsiNexus.lun[k]); |
| 2846 | |
| 2847 | } |
| 2848 | else |
| 2849 | { |
| 2850 | // lun already known |
| 2851 | } |
| 2852 | break; |
| 2853 | } |
| 2854 | } |
| 2855 | // print out the new list... |
| 2856 | for( j=0; j< CPQFCTS_MAX_LUN; j++) |
| 2857 | { |
| 2858 | if( pLoggedInPort->ScsiNexus.lun[j] == 0xFF) |
| 2859 | break; // done |
| 2860 | // printk("[%d]->%02d ", j, pLoggedInPort->ScsiNexus.lun[j]); |
| 2861 | } |
| 2862 | } |
| 2863 | else |
| 2864 | { |
| 2865 | // printk("Linux SCSI LUNs[] -> Device LUNs: "); |
| 2866 | // first time - this is easy |
| 2867 | for( i=8, j=0; i<LunListLen+8 && j< CPQFCTS_MAX_LUN; i+=8, j++) |
| 2868 | { |
| 2869 | pLoggedInPort->ScsiNexus.lun[j] = ucBuff[i+1]; |
| 2870 | // printk("[%d]->%02d ", j, pLoggedInPort->ScsiNexus.lun[j]); |
| 2871 | } |
| 2872 | // printk("\n"); |
| 2873 | } |
| 2874 | } |
| 2875 | } |
| 2876 | |
| 2877 | Done: ; |
| 2878 | } |
| 2879 | |
| 2880 | extern int is_private_data_of_cpqfc(CPQFCHBA *hba, void * pointer); |
| 2881 | extern void cpqfc_free_private_data(CPQFCHBA *hba, cpqfc_passthru_private_t *data); |
| 2882 | |
| 2883 | static void |
| 2884 | call_scsi_done(Scsi_Cmnd *Cmnd) |
| 2885 | { |
| 2886 | CPQFCHBA *hba; |
| 2887 | hba = (CPQFCHBA *) Cmnd->device->host->hostdata; |
| 2888 | // Was this command a cpqfc passthru ioctl ? |
| 2889 | if (Cmnd->sc_request != NULL && Cmnd->device->host != NULL && |
| 2890 | Cmnd->device->host->hostdata != NULL && |
| 2891 | is_private_data_of_cpqfc((CPQFCHBA *) Cmnd->device->host->hostdata, |
| 2892 | Cmnd->sc_request->upper_private_data)) { |
| 2893 | cpqfc_free_private_data(hba, |
| 2894 | Cmnd->sc_request->upper_private_data); |
| 2895 | Cmnd->sc_request->upper_private_data = NULL; |
| 2896 | Cmnd->result &= 0xff00ffff; |
| 2897 | Cmnd->result |= (DID_PASSTHROUGH << 16); // prevents retry |
| 2898 | } |
| 2899 | if (Cmnd->scsi_done != NULL) |
| 2900 | (*Cmnd->scsi_done)(Cmnd); |
| 2901 | } |
| 2902 | |
| 2903 | // After successfully getting a "Process Login" (PRLI) from an |
| 2904 | // FC port, we want to Discover the LUNs so that we know the |
| 2905 | // addressing type (e.g., FCP-SCSI Volume Set Address, Peripheral |
| 2906 | // Unit Device), and whether SSP (Selective Storage Presentation or |
| 2907 | // Lun Masking) has made the LUN numbers non-zero based or |
| 2908 | // non-contiguous. To remain backward compatible with the SCSI-2 |
| 2909 | // driver model, which expects a contiguous LUNs starting at 0, |
| 2910 | // will use the ReportLuns info to map from "device" to "Linux" |
| 2911 | // LUNs. |
| 2912 | static void IssueReportLunsCommand( |
| 2913 | CPQFCHBA* cpqfcHBAdata, |
| 2914 | TachFCHDR_GCMND* fchs) |
| 2915 | { |
| 2916 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 2917 | PFC_LOGGEDIN_PORT pLoggedInPort; |
| 2918 | struct scsi_cmnd *Cmnd = NULL; |
| 2919 | struct scsi_device *ScsiDev = NULL; |
| 2920 | LONG x_ID; |
| 2921 | ULONG ulStatus; |
| 2922 | UCHAR *ucBuff; |
| 2923 | |
| 2924 | if( !cpqfcHBAdata->PortDiscDone) // cleared by LDn |
| 2925 | { |
| 2926 | printk("Discard Q'd ReportLun command\n"); |
| 2927 | goto Done; |
| 2928 | } |
| 2929 | |
| 2930 | // find the device (from port_id) we're talking to |
| 2931 | pLoggedInPort = fcFindLoggedInPort( fcChip, |
| 2932 | NULL, // DON'T search Scsi Nexus |
| 2933 | fchs->s_id & 0xFFFFFF, |
| 2934 | NULL, // DON'T search linked list for FC WWN |
| 2935 | NULL); // DON'T care about end of list |
| 2936 | if( pLoggedInPort ) // we'd BETTER find it! |
| 2937 | { |
| 2938 | |
| 2939 | |
| 2940 | if( !(pLoggedInPort->fcp_info & TARGET_FUNCTION) ) |
| 2941 | goto Done; // forget it - FC device not a "target" |
| 2942 | |
| 2943 | |
| 2944 | ScsiDev = scsi_get_host_dev (cpqfcHBAdata->HostAdapter); |
| 2945 | if (!ScsiDev) |
| 2946 | goto Done; |
| 2947 | |
| 2948 | Cmnd = scsi_get_command (ScsiDev, GFP_KERNEL); |
| 2949 | if (!Cmnd) |
| 2950 | goto Done; |
| 2951 | |
| 2952 | ucBuff = pLoggedInPort->ReportLunsPayload; |
| 2953 | |
| 2954 | memset( ucBuff, 0, REPORT_LUNS_PL); |
| 2955 | |
| 2956 | Cmnd->scsi_done = ScsiReportLunsDone; |
| 2957 | |
| 2958 | Cmnd->request_buffer = pLoggedInPort->ReportLunsPayload; |
| 2959 | Cmnd->request_bufflen = REPORT_LUNS_PL; |
| 2960 | |
| 2961 | Cmnd->cmnd[0] = 0xA0; |
| 2962 | Cmnd->cmnd[8] = REPORT_LUNS_PL >> 8; |
| 2963 | Cmnd->cmnd[9] = (UCHAR)REPORT_LUNS_PL; |
| 2964 | Cmnd->cmd_len = 12; |
| 2965 | |
| 2966 | Cmnd->device->channel = pLoggedInPort->ScsiNexus.channel; |
| 2967 | Cmnd->device->id = pLoggedInPort->ScsiNexus.target; |
| 2968 | |
| 2969 | |
| 2970 | ulStatus = cpqfcTSBuildExchange( |
| 2971 | cpqfcHBAdata, |
| 2972 | SCSI_IRE, |
| 2973 | fchs, |
| 2974 | Cmnd, // buffer for Report Lun data |
| 2975 | &x_ID );// fcController->fcExchanges index, -1 if failed |
| 2976 | |
| 2977 | if( !ulStatus ) // Exchange setup? |
| 2978 | { |
| 2979 | ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, x_ID ); |
| 2980 | if( !ulStatus ) |
| 2981 | { |
| 2982 | // submitted to Tach's Outbound Que (ERQ PI incremented) |
| 2983 | // waited for completion for ELS type (Login frames issued |
| 2984 | // synchronously) |
| 2985 | } |
| 2986 | else |
| 2987 | // check reason for Exchange not being started - we might |
| 2988 | // want to Queue and start later, or fail with error |
| 2989 | { |
| 2990 | |
| 2991 | } |
| 2992 | } |
| 2993 | |
| 2994 | else // Xchange setup failed... |
| 2995 | printk(" cpqfcTSBuildExchange failed: %Xh\n", ulStatus ); |
| 2996 | } |
| 2997 | else // like, we just got a PRLI ACC, and now the port is gone? |
| 2998 | { |
| 2999 | printk(" can't send ReportLuns - no login for port_id %Xh\n", |
| 3000 | fchs->s_id & 0xFFFFFF); |
| 3001 | } |
| 3002 | |
| 3003 | |
| 3004 | |
| 3005 | Done: |
| 3006 | |
| 3007 | if (Cmnd) |
| 3008 | scsi_put_command (Cmnd); |
| 3009 | if (ScsiDev) |
| 3010 | scsi_free_host_dev (ScsiDev); |
| 3011 | } |
| 3012 | |
| 3013 | |
| 3014 | |
| 3015 | |
| 3016 | |
| 3017 | |
| 3018 | |
| 3019 | static void CompleteBoardLockCmnd( CPQFCHBA *cpqfcHBAdata) |
| 3020 | { |
| 3021 | int i; |
| 3022 | for( i = CPQFCTS_REQ_QUEUE_LEN-1; i>= 0; i--) |
| 3023 | { |
| 3024 | if( cpqfcHBAdata->BoardLockCmnd[i] != NULL ) |
| 3025 | { |
| 3026 | Scsi_Cmnd *Cmnd = cpqfcHBAdata->BoardLockCmnd[i]; |
| 3027 | cpqfcHBAdata->BoardLockCmnd[i] = NULL; |
| 3028 | Cmnd->result = (DID_SOFT_ERROR << 16); // ask for retry |
| 3029 | // printk(" BoardLockCmnd[%d] %p Complete, chnl/target/lun %d/%d/%d\n", |
| 3030 | // i,Cmnd, Cmnd->channel, Cmnd->target, Cmnd->lun); |
| 3031 | call_scsi_done(Cmnd); |
| 3032 | } |
| 3033 | } |
| 3034 | } |
| 3035 | |
| 3036 | |
| 3037 | |
| 3038 | |
| 3039 | |
| 3040 | |
| 3041 | // runs every 1 second for FC exchange timeouts and implicit FC device logouts |
| 3042 | |
| 3043 | void cpqfcTSheartbeat( unsigned long ptr ) |
| 3044 | { |
| 3045 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)ptr; |
| 3046 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 3047 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 3048 | PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts; |
| 3049 | ULONG i; |
| 3050 | unsigned long flags; |
| 3051 | DECLARE_MUTEX_LOCKED(BoardLock); |
| 3052 | |
| 3053 | PCI_TRACE( 0xA8) |
| 3054 | |
| 3055 | if( cpqfcHBAdata->BoardLock) // Worker Task Running? |
| 3056 | goto Skip; |
| 3057 | |
| 3058 | // STOP _que function |
| 3059 | spin_lock_irqsave( cpqfcHBAdata->HostAdapter->host_lock, flags); |
| 3060 | |
| 3061 | PCI_TRACE( 0xA8) |
| 3062 | |
| 3063 | |
| 3064 | cpqfcHBAdata->BoardLock = &BoardLock; // stop Linux SCSI command queuing |
| 3065 | |
| 3066 | // release the IO lock (and re-enable interrupts) |
| 3067 | spin_unlock_irqrestore( cpqfcHBAdata->HostAdapter->host_lock, flags); |
| 3068 | |
| 3069 | // Ensure no contention from _quecommand or Worker process |
| 3070 | CPQ_SPINLOCK_HBA( cpqfcHBAdata) |
| 3071 | |
| 3072 | PCI_TRACE( 0xA8) |
| 3073 | |
| 3074 | |
| 3075 | disable_irq( cpqfcHBAdata->HostAdapter->irq); // our IRQ |
| 3076 | |
| 3077 | // Complete the "bad target" commands (normally only used during |
| 3078 | // initialization, since we aren't supposed to call "scsi_done" |
| 3079 | // inside the queuecommand() function). (this is overly contorted, |
| 3080 | // scsi_done can be safely called from queuecommand for |
| 3081 | // this bad target case. May want to simplify this later) |
| 3082 | |
| 3083 | for( i=0; i< CPQFCTS_MAX_TARGET_ID; i++) |
| 3084 | { |
| 3085 | if( cpqfcHBAdata->BadTargetCmnd[i] ) |
| 3086 | { |
| 3087 | Scsi_Cmnd *Cmnd = cpqfcHBAdata->BadTargetCmnd[i]; |
| 3088 | cpqfcHBAdata->BadTargetCmnd[i] = NULL; |
| 3089 | Cmnd->result = (DID_BAD_TARGET << 16); |
| 3090 | call_scsi_done(Cmnd); |
| 3091 | } |
| 3092 | else |
| 3093 | break; |
| 3094 | } |
| 3095 | |
| 3096 | |
| 3097 | // logged in ports -- re-login check (ports required to verify login with |
| 3098 | // PDISC after LIP within 2 secs) |
| 3099 | |
| 3100 | // prevent contention |
| 3101 | while( pLoggedInPort ) // for all ports which are expecting |
| 3102 | // PDISC after the next LIP, check to see if |
| 3103 | // time is up! |
| 3104 | { |
| 3105 | // Important: we only detect "timeout" condition on TRANSITION |
| 3106 | // from non-zero to zero |
| 3107 | if( pLoggedInPort->LOGO_timer ) // time-out "armed"? |
| 3108 | { |
| 3109 | if( !(--pLoggedInPort->LOGO_timer) ) // DEC from 1 to 0? |
| 3110 | { |
| 3111 | // LOGOUT time! Per PLDA, PDISC hasn't complete in 2 secs, so |
| 3112 | // issue LOGO request and destroy all I/O with other FC port(s). |
| 3113 | |
| 3114 | /* |
| 3115 | printk(" ~cpqfcTS heartbeat: LOGOut!~ "); |
| 3116 | printk("Linux SCSI Chanl/Target %d/%d (port_id %06Xh) WWN %08X%08X\n", |
| 3117 | pLoggedInPort->ScsiNexus.channel, |
| 3118 | pLoggedInPort->ScsiNexus.target, |
| 3119 | pLoggedInPort->port_id, |
| 3120 | (ULONG)(pLoggedInPort->u.liWWN &0xFFFFFFFF), |
| 3121 | (ULONG)(pLoggedInPort->u.liWWN>>32)); |
| 3122 | |
| 3123 | */ |
| 3124 | cpqfcTSImplicitLogout( cpqfcHBAdata, pLoggedInPort); |
| 3125 | |
| 3126 | } |
| 3127 | // else simply decremented - maybe next time... |
| 3128 | } |
| 3129 | pLoggedInPort = pLoggedInPort->pNextPort; |
| 3130 | } |
| 3131 | |
| 3132 | |
| 3133 | |
| 3134 | |
| 3135 | |
| 3136 | // ************ FC EXCHANGE TIMEOUT CHECK ************** |
| 3137 | |
| 3138 | for( i=0; i< TACH_MAX_XID; i++) |
| 3139 | { |
| 3140 | if( Exchanges->fcExchange[i].type ) // exchange defined? |
| 3141 | { |
| 3142 | |
| 3143 | if( !Exchanges->fcExchange[i].timeOut ) // time expired |
| 3144 | { |
| 3145 | // Set Exchange timeout status |
| 3146 | Exchanges->fcExchange[i].status |= FC2_TIMEOUT; |
| 3147 | |
| 3148 | if( i >= TACH_SEST_LEN ) // Link Service Exchange |
| 3149 | { |
| 3150 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, i); // Don't "abort" LinkService |
| 3151 | } |
| 3152 | |
| 3153 | else // SEST Exchange TO -- may post ABTS to Worker Thread Que |
| 3154 | { |
| 3155 | // (Make sure we don't keep timing it out; let other functions |
| 3156 | // complete it or set the timeOut as needed) |
| 3157 | Exchanges->fcExchange[i].timeOut = 30000; // seconds default |
| 3158 | |
| 3159 | if( Exchanges->fcExchange[i].type |
| 3160 | & |
| 3161 | (BLS_ABTS | BLS_ABTS_ACC ) ) |
| 3162 | { |
| 3163 | // For BLS_ABTS*, an upper level might still have |
| 3164 | // an outstanding command waiting for low-level completion. |
| 3165 | // Also, in the case of a WRITE, we MUST get confirmation |
| 3166 | // of either ABTS ACC or RJT before re-using the Exchange. |
| 3167 | // It's possible that the RAID cache algorithm can hang |
| 3168 | // if we fail to complete a WRITE to a LBA, when a READ |
| 3169 | // comes later to that same LBA. Therefore, we must |
| 3170 | // ensure that the target verifies receipt of ABTS for |
| 3171 | // the exchange |
| 3172 | |
| 3173 | printk("~TO Q'd ABTS (x_ID %Xh)~ ", i); |
| 3174 | // TriggerHBA( fcChip->Registers.ReMapMemBase); |
| 3175 | |
| 3176 | // On timeout of a ABTS exchange, check to |
| 3177 | // see if the FC device has a current valid login. |
| 3178 | // If so, restart it. |
| 3179 | pLoggedInPort = fcFindLoggedInPort( fcChip, |
| 3180 | Exchanges->fcExchange[i].Cmnd, // find Scsi Nexus |
| 3181 | 0, // DON'T search linked list for FC port id |
| 3182 | NULL, // DON'T search linked list for FC WWN |
| 3183 | NULL); // DON'T care about end of list |
| 3184 | |
| 3185 | // device exists? |
| 3186 | if( pLoggedInPort ) // device exists? |
| 3187 | { |
| 3188 | if( pLoggedInPort->prli ) // logged in for FCP-SCSI? |
| 3189 | { |
| 3190 | // attempt to restart the ABTS |
| 3191 | printk(" ~restarting ABTS~ "); |
| 3192 | cpqfcTSStartExchange( cpqfcHBAdata, i ); |
| 3193 | |
| 3194 | } |
| 3195 | } |
| 3196 | } |
| 3197 | else // not an ABTS |
| 3198 | { |
| 3199 | |
| 3200 | // We expect the WorkerThread to change the xchng type to |
| 3201 | // abort and set appropriate timeout. |
| 3202 | cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &i ); // timed-out |
| 3203 | } |
| 3204 | } |
| 3205 | } |
| 3206 | else // time not expired... |
| 3207 | { |
| 3208 | // decrement timeout: 1 or more seconds left |
| 3209 | --Exchanges->fcExchange[i].timeOut; |
| 3210 | } |
| 3211 | } |
| 3212 | } |
| 3213 | |
| 3214 | |
| 3215 | enable_irq( cpqfcHBAdata->HostAdapter->irq); |
| 3216 | |
| 3217 | |
| 3218 | CPQ_SPINUNLOCK_HBA( cpqfcHBAdata) |
| 3219 | |
| 3220 | cpqfcHBAdata->BoardLock = NULL; // Linux SCSI commands may be queued |
| 3221 | |
| 3222 | // Now, complete any Cmnd we Q'd up while BoardLock was held |
| 3223 | |
| 3224 | CompleteBoardLockCmnd( cpqfcHBAdata); |
| 3225 | |
| 3226 | |
| 3227 | // restart the timer to run again (1 sec later) |
| 3228 | Skip: |
| 3229 | mod_timer( &cpqfcHBAdata->cpqfcTStimer, jiffies + HZ); |
| 3230 | |
| 3231 | PCI_TRACEO( i, 0xA8) |
| 3232 | return; |
| 3233 | } |
| 3234 | |
| 3235 | |
| 3236 | // put valid FC-AL physical address in spec order |
| 3237 | static const UCHAR valid_al_pa[]={ |
| 3238 | 0xef, 0xe8, 0xe4, 0xe2, |
| 3239 | 0xe1, 0xE0, 0xDC, 0xDA, |
| 3240 | 0xD9, 0xD6, 0xD5, 0xD4, |
| 3241 | 0xD3, 0xD2, 0xD1, 0xCe, |
| 3242 | 0xCd, 0xCc, 0xCb, 0xCa, |
| 3243 | 0xC9, 0xC7, 0xC6, 0xC5, |
| 3244 | 0xC3, 0xBc, 0xBa, 0xB9, |
| 3245 | 0xB6, 0xB5, 0xB4, 0xB3, |
| 3246 | 0xB2, 0xB1, 0xae, 0xad, |
| 3247 | 0xAc, 0xAb, 0xAa, 0xA9, |
| 3248 | |
| 3249 | 0xA7, 0xA6, 0xA5, 0xA3, |
| 3250 | 0x9f, 0x9e, 0x9d, 0x9b, |
| 3251 | 0x98, 0x97, 0x90, 0x8f, |
| 3252 | 0x88, 0x84, 0x82, 0x81, |
| 3253 | 0x80, 0x7c, 0x7a, 0x79, |
| 3254 | 0x76, 0x75, 0x74, 0x73, |
| 3255 | 0x72, 0x71, 0x6e, 0x6d, |
| 3256 | 0x6c, 0x6b, 0x6a, 0x69, |
| 3257 | 0x67, 0x66, 0x65, 0x63, |
| 3258 | 0x5c, 0x5a, 0x59, 0x56, |
| 3259 | |
| 3260 | 0x55, 0x54, 0x53, 0x52, |
| 3261 | 0x51, 0x4e, 0x4d, 0x4c, |
| 3262 | 0x4b, 0x4a, 0x49, 0x47, |
| 3263 | 0x46, 0x45, 0x43, 0x3c, |
| 3264 | 0x3a, 0x39, 0x36, 0x35, |
| 3265 | 0x34, 0x33, 0x32, 0x31, |
| 3266 | 0x2e, 0x2d, 0x2c, 0x2b, |
| 3267 | 0x2a, 0x29, 0x27, 0x26, |
| 3268 | 0x25, 0x23, 0x1f, 0x1E, |
| 3269 | 0x1d, 0x1b, 0x18, 0x17, |
| 3270 | |
| 3271 | 0x10, 0x0f, 8, 4, 2, 1 }; // ALPA 0 (Fabric) is special case |
| 3272 | |
| 3273 | const int number_of_al_pa = (sizeof(valid_al_pa) ); |
| 3274 | |
| 3275 | |
| 3276 | |
| 3277 | // this function looks up an al_pa from the table of valid al_pa's |
| 3278 | // we decrement from the last decimal loop ID, because soft al_pa |
| 3279 | // (our typical case) are assigned with highest priority (and high al_pa) |
| 3280 | // first. See "In-Depth FC-AL", R. Kembel pg. 38 |
| 3281 | // INPUTS: |
| 3282 | // al_pa - 24 bit port identifier (8 bit al_pa on private loop) |
| 3283 | // RETURN: |
| 3284 | // Loop ID - serves are index to array of logged in ports |
| 3285 | // -1 - invalid al_pa (not all 8 bit values are legal) |
| 3286 | |
| 3287 | #if (0) |
| 3288 | static int GetLoopID( ULONG al_pa ) |
| 3289 | { |
| 3290 | int i; |
| 3291 | |
| 3292 | for( i = number_of_al_pa -1; i >= 0; i--) // dec. |
| 3293 | { |
| 3294 | if( valid_al_pa[i] == (UCHAR)al_pa ) // take lowest 8 bits |
| 3295 | return i; // success - found valid al_pa; return decimal LoopID |
| 3296 | } |
| 3297 | return -1; // failed - not found |
| 3298 | } |
| 3299 | #endif |
| 3300 | |
| 3301 | extern cpqfc_passthru_private_t *cpqfc_private(Scsi_Request *sr); |
| 3302 | |
| 3303 | // Search the singly (forward) linked list "fcPorts" looking for |
| 3304 | // either the SCSI target (if != -1), port_id (if not NULL), |
| 3305 | // or WWN (if not null), in that specific order. |
| 3306 | // If we find a SCSI nexus (from Cmnd arg), set the SCp.phase |
| 3307 | // field according to VSA or PDU |
| 3308 | // RETURNS: |
| 3309 | // Ptr to logged in port struct if found |
| 3310 | // (NULL if not found) |
| 3311 | // pLastLoggedInPort - ptr to last struct (for adding new ones) |
| 3312 | // |
| 3313 | PFC_LOGGEDIN_PORT fcFindLoggedInPort( |
| 3314 | PTACHYON fcChip, |
| 3315 | Scsi_Cmnd *Cmnd, // search linked list for Scsi Nexus (channel/target/lun) |
| 3316 | ULONG port_id, // search linked list for al_pa, or |
| 3317 | UCHAR wwn[8], // search linked list for WWN, or... |
| 3318 | PFC_LOGGEDIN_PORT *pLastLoggedInPort ) |
| 3319 | |
| 3320 | { |
| 3321 | PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts; |
| 3322 | BOOLEAN target_id_valid=FALSE; |
| 3323 | BOOLEAN port_id_valid=FALSE; |
| 3324 | BOOLEAN wwn_valid=FALSE; |
| 3325 | int i; |
| 3326 | |
| 3327 | |
| 3328 | if( Cmnd != NULL ) |
| 3329 | target_id_valid = TRUE; |
| 3330 | |
| 3331 | else if( port_id ) // note! 24-bit NULL address is illegal |
| 3332 | port_id_valid = TRUE; |
| 3333 | |
| 3334 | else |
| 3335 | { |
| 3336 | if( wwn ) // non-null arg? (OK to pass NULL when not searching WWN) |
| 3337 | { |
| 3338 | for( i=0; i<8; i++) // valid WWN passed? NULL WWN invalid |
| 3339 | { |
| 3340 | if( wwn[i] != 0 ) |
| 3341 | wwn_valid = TRUE; // any non-zero byte makes (presumably) valid |
| 3342 | } |
| 3343 | } |
| 3344 | } |
| 3345 | // check other options ... |
| 3346 | |
| 3347 | |
| 3348 | // In case multiple search options are given, we use a priority |
| 3349 | // scheme: |
| 3350 | // While valid pLoggedIn Ptr |
| 3351 | // If port_id is valid |
| 3352 | // if port_id matches, return Ptr |
| 3353 | // If wwn is valid |
| 3354 | // if wwn matches, return Ptr |
| 3355 | // Next Ptr in list |
| 3356 | // |
| 3357 | // Return NULL (not found) |
| 3358 | |
| 3359 | |
| 3360 | while( pLoggedInPort ) // NULL marks end of list (1st ptr always valid) |
| 3361 | { |
| 3362 | if( pLastLoggedInPort ) // caller's pointer valid? |
| 3363 | *pLastLoggedInPort = pLoggedInPort; // end of linked list |
| 3364 | |
| 3365 | if( target_id_valid ) |
| 3366 | { |
| 3367 | // check Linux Scsi Cmnd for channel/target Nexus match |
| 3368 | // (all luns are accessed through matching "pLoggedInPort") |
| 3369 | if( (pLoggedInPort->ScsiNexus.target == Cmnd->device->id) |
| 3370 | && |
| 3371 | (pLoggedInPort->ScsiNexus.channel == Cmnd->device->channel)) |
| 3372 | { |
| 3373 | // For "passthru" modes, the IOCTL caller is responsible |
| 3374 | // for setting the FCP-LUN addressing |
| 3375 | if (Cmnd->sc_request != NULL && Cmnd->device->host != NULL && |
| 3376 | Cmnd->device->host->hostdata != NULL && |
| 3377 | is_private_data_of_cpqfc((CPQFCHBA *) Cmnd->device->host->hostdata, |
| 3378 | Cmnd->sc_request->upper_private_data)) { |
| 3379 | /* This is a passthru... */ |
| 3380 | cpqfc_passthru_private_t *pd; |
| 3381 | pd = Cmnd->sc_request->upper_private_data; |
| 3382 | Cmnd->SCp.phase = pd->bus; |
| 3383 | // Cmnd->SCp.have_data_in = pd->pdrive; |
| 3384 | Cmnd->SCp.have_data_in = Cmnd->device->lun; |
| 3385 | } else { |
| 3386 | /* This is not a passthru... */ |
| 3387 | |
| 3388 | // set the FCP-LUN addressing type |
| 3389 | Cmnd->SCp.phase = pLoggedInPort->ScsiNexus.VolumeSetAddressing; |
| 3390 | |
| 3391 | // set the Device Type we got from the snooped INQUIRY string |
| 3392 | Cmnd->SCp.Message = pLoggedInPort->ScsiNexus.InqDeviceType; |
| 3393 | |
| 3394 | // handle LUN masking; if not "default" (illegal) lun value, |
| 3395 | // the use it. These lun values are set by a successful |
| 3396 | // Report Luns command |
| 3397 | if( pLoggedInPort->ScsiNexus.LunMasking == 1) |
| 3398 | { |
| 3399 | if (Cmnd->device->lun > sizeof(pLoggedInPort->ScsiNexus.lun)) |
| 3400 | return NULL; |
| 3401 | // we KNOW all the valid LUNs... 0xFF is invalid! |
| 3402 | Cmnd->SCp.have_data_in = pLoggedInPort->ScsiNexus.lun[Cmnd->device->lun]; |
| 3403 | if (pLoggedInPort->ScsiNexus.lun[Cmnd->device->lun] == 0xFF) |
| 3404 | return NULL; |
| 3405 | // printk("xlating lun %d to 0x%02x\n", Cmnd->lun, |
| 3406 | // pLoggedInPort->ScsiNexus.lun[Cmnd->lun]); |
| 3407 | } |
| 3408 | else |
| 3409 | Cmnd->SCp.have_data_in = Cmnd->device->lun; // Linux & target luns match |
| 3410 | } |
| 3411 | break; // found it! |
| 3412 | } |
| 3413 | } |
| 3414 | |
| 3415 | if( port_id_valid ) // look for alpa first |
| 3416 | { |
| 3417 | if( pLoggedInPort->port_id == port_id ) |
| 3418 | break; // found it! |
| 3419 | } |
| 3420 | if( wwn_valid ) // look for wwn second |
| 3421 | { |
| 3422 | |
| 3423 | if( !memcmp( &pLoggedInPort->u.ucWWN[0], &wwn[0], 8)) |
| 3424 | { |
| 3425 | // all 8 bytes of WWN match |
| 3426 | break; // found it! |
| 3427 | } |
| 3428 | } |
| 3429 | |
| 3430 | pLoggedInPort = pLoggedInPort->pNextPort; // try next port |
| 3431 | } |
| 3432 | |
| 3433 | return pLoggedInPort; |
| 3434 | } |
| 3435 | |
| 3436 | |
| 3437 | |
| 3438 | |
| 3439 | // |
| 3440 | // We need to examine the SEST table and re-validate |
| 3441 | // any open Exchanges for this LoggedInPort |
| 3442 | // To make Tachyon pay attention, Freeze FCP assists, |
| 3443 | // set VAL bits, Unfreeze FCP assists |
| 3444 | static void RevalidateSEST( struct Scsi_Host *HostAdapter, |
| 3445 | PFC_LOGGEDIN_PORT pLoggedInPort) |
| 3446 | { |
| 3447 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 3448 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 3449 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 3450 | ULONG x_ID; |
| 3451 | BOOLEAN TachFroze = FALSE; |
| 3452 | |
| 3453 | |
| 3454 | // re-validate any SEST exchanges that are permitted |
| 3455 | // to survive the link down (e.g., good PDISC performed) |
| 3456 | for( x_ID = 0; x_ID < TACH_SEST_LEN; x_ID++) |
| 3457 | { |
| 3458 | |
| 3459 | // If the SEST entry port_id matches the pLoggedInPort, |
| 3460 | // we need to re-validate |
| 3461 | if( (Exchanges->fcExchange[ x_ID].type == SCSI_IRE) |
| 3462 | || |
| 3463 | (Exchanges->fcExchange[ x_ID].type == SCSI_IWE)) |
| 3464 | { |
| 3465 | |
| 3466 | if( (Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF) // (24-bit port ID) |
| 3467 | == pLoggedInPort->port_id) |
| 3468 | { |
| 3469 | // printk(" re-val xID %Xh ", x_ID); |
| 3470 | if( !TachFroze ) // freeze if not already frozen |
| 3471 | TachFroze |= FreezeTach( cpqfcHBAdata); |
| 3472 | fcChip->SEST->u[ x_ID].IWE.Hdr_Len |= 0x80000000; // set VAL bit |
| 3473 | } |
| 3474 | } |
| 3475 | } |
| 3476 | |
| 3477 | if( TachFroze) |
| 3478 | { |
| 3479 | fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists |
| 3480 | } |
| 3481 | } |
| 3482 | |
| 3483 | |
| 3484 | // Complete an Linux Cmnds that we Queued because |
| 3485 | // our FC link was down (cause immediate retry) |
| 3486 | |
| 3487 | static void UnblockScsiDevice( struct Scsi_Host *HostAdapter, |
| 3488 | PFC_LOGGEDIN_PORT pLoggedInPort) |
| 3489 | { |
| 3490 | CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata; |
| 3491 | Scsi_Cmnd* *SCptr = &cpqfcHBAdata->LinkDnCmnd[0]; |
| 3492 | Scsi_Cmnd *Cmnd; |
| 3493 | int indx; |
| 3494 | |
| 3495 | |
| 3496 | |
| 3497 | // if the device was previously "blocked", make sure |
| 3498 | // we unblock it so Linux SCSI will resume |
| 3499 | |
| 3500 | pLoggedInPort->device_blocked = FALSE; // clear our flag |
| 3501 | |
| 3502 | // check the Link Down command ptr buffer; |
| 3503 | // we can complete now causing immediate retry |
| 3504 | for( indx=0; indx < CPQFCTS_REQ_QUEUE_LEN; indx++, SCptr++) |
| 3505 | { |
| 3506 | if( *SCptr != NULL ) // scsi command to complete? |
| 3507 | { |
| 3508 | #ifdef DUMMYCMND_DBG |
| 3509 | printk("complete Cmnd %p in LinkDnCmnd[%d]\n", *SCptr,indx); |
| 3510 | #endif |
| 3511 | Cmnd = *SCptr; |
| 3512 | |
| 3513 | |
| 3514 | // Are there any Q'd commands for this target? |
| 3515 | if( (Cmnd->device->id == pLoggedInPort->ScsiNexus.target) |
| 3516 | && |
| 3517 | (Cmnd->device->channel == pLoggedInPort->ScsiNexus.channel) ) |
| 3518 | { |
| 3519 | Cmnd->result = (DID_SOFT_ERROR <<16); // force retry |
| 3520 | if( Cmnd->scsi_done == NULL) |
| 3521 | { |
| 3522 | printk("LinkDnCmnd scsi_done ptr null, port_id %Xh\n", |
| 3523 | pLoggedInPort->port_id); |
| 3524 | } |
| 3525 | else |
| 3526 | call_scsi_done(Cmnd); |
| 3527 | *SCptr = NULL; // free this slot for next use |
| 3528 | } |
| 3529 | } |
| 3530 | } |
| 3531 | } |
| 3532 | |
| 3533 | |
| 3534 | //#define WWN_DBG 1 |
| 3535 | |
| 3536 | static void SetLoginFields( |
| 3537 | PFC_LOGGEDIN_PORT pLoggedInPort, |
| 3538 | TachFCHDR_GCMND* fchs, |
| 3539 | BOOLEAN PDisc, |
| 3540 | BOOLEAN Originator) |
| 3541 | { |
| 3542 | LOGIN_PAYLOAD logi; // FC-PH Port Login |
| 3543 | PRLI_REQUEST prli; // copy for BIG ENDIAN switch |
| 3544 | int i; |
| 3545 | #ifdef WWN_DBG |
| 3546 | ULONG ulBuff; |
| 3547 | #endif |
| 3548 | |
| 3549 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi)); |
| 3550 | |
| 3551 | pLoggedInPort->Originator = Originator; |
| 3552 | pLoggedInPort->port_id = fchs->s_id & 0xFFFFFF; |
| 3553 | |
| 3554 | switch( fchs->pl[0] & 0xffff ) |
| 3555 | { |
| 3556 | case 0x00000002: // PLOGI or PDISC ACCept? |
| 3557 | if( PDisc ) // PDISC accept |
| 3558 | goto PDISC_case; |
| 3559 | |
| 3560 | case 0x00000003: // ELS_PLOGI or ELS_PLOGI_ACC |
| 3561 | |
| 3562 | // Login BB_credit typically 0 for Tachyons |
| 3563 | pLoggedInPort->BB_credit = logi.cmn_services.bb_credit; |
| 3564 | |
| 3565 | // e.g. 128, 256, 1024, 2048 per FC-PH spec |
| 3566 | // We have to use this when setting up SEST Writes, |
| 3567 | // since that determines frame size we send. |
| 3568 | pLoggedInPort->rx_data_size = logi.class3.rx_data_size; |
| 3569 | pLoggedInPort->plogi = TRUE; |
| 3570 | pLoggedInPort->pdisc = FALSE; |
| 3571 | pLoggedInPort->prli = FALSE; // ELS_PLOGI resets |
| 3572 | pLoggedInPort->flogi = FALSE; // ELS_PLOGI resets |
| 3573 | pLoggedInPort->logo = FALSE; // ELS_PLOGI resets |
| 3574 | pLoggedInPort->LOGO_counter = 0;// ELS_PLOGI resets |
| 3575 | pLoggedInPort->LOGO_timer = 0;// ELS_PLOGI resets |
| 3576 | |
| 3577 | // was this PLOGI to a Fabric? |
| 3578 | if( pLoggedInPort->port_id == 0xFFFFFC ) // well know address |
| 3579 | pLoggedInPort->flogi = TRUE; |
| 3580 | |
| 3581 | |
| 3582 | for( i=0; i<8; i++) // copy the LOGIN port's WWN |
| 3583 | pLoggedInPort->u.ucWWN[i] = logi.port_name[i]; |
| 3584 | |
| 3585 | #ifdef WWN_DBG |
| 3586 | ulBuff = (ULONG)pLoggedInPort->u.liWWN; |
| 3587 | if( pLoggedInPort->Originator) |
| 3588 | printk("o"); |
| 3589 | else |
| 3590 | printk("r"); |
| 3591 | printk("PLOGI port_id %Xh, WWN %08X", |
| 3592 | pLoggedInPort->port_id, ulBuff); |
| 3593 | |
| 3594 | ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32); |
| 3595 | printk("%08Xh fcPort %p\n", ulBuff, pLoggedInPort); |
| 3596 | #endif |
| 3597 | break; |
| 3598 | |
| 3599 | |
| 3600 | |
| 3601 | |
| 3602 | case 0x00000005: // ELS_LOGO (logout) |
| 3603 | |
| 3604 | |
| 3605 | pLoggedInPort->plogi = FALSE; |
| 3606 | pLoggedInPort->pdisc = FALSE; |
| 3607 | pLoggedInPort->prli = FALSE; // ELS_PLOGI resets |
| 3608 | pLoggedInPort->flogi = FALSE; // ELS_PLOGI resets |
| 3609 | pLoggedInPort->logo = TRUE; // ELS_PLOGI resets |
| 3610 | pLoggedInPort->LOGO_counter++; // ELS_PLOGI resets |
| 3611 | pLoggedInPort->LOGO_timer = 0; |
| 3612 | #ifdef WWN_DBG |
| 3613 | ulBuff = (ULONG)pLoggedInPort->u.liWWN; |
| 3614 | if( pLoggedInPort->Originator) |
| 3615 | printk("o"); |
| 3616 | else |
| 3617 | printk("r"); |
| 3618 | printk("LOGO port_id %Xh, WWN %08X", |
| 3619 | pLoggedInPort->port_id, ulBuff); |
| 3620 | |
| 3621 | ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32); |
| 3622 | printk("%08Xh\n", ulBuff); |
| 3623 | #endif |
| 3624 | break; |
| 3625 | |
| 3626 | |
| 3627 | |
| 3628 | PDISC_case: |
| 3629 | case 0x00000050: // ELS_PDISC or ELS_PDISC_ACC |
| 3630 | pLoggedInPort->LOGO_timer = 0; // stop the time-out |
| 3631 | |
| 3632 | pLoggedInPort->prli = TRUE; // ready to accept FCP-SCSI I/O |
| 3633 | |
| 3634 | |
| 3635 | |
| 3636 | #ifdef WWN_DBG |
| 3637 | ulBuff = (ULONG)pLoggedInPort->u.liWWN; |
| 3638 | if( pLoggedInPort->Originator) |
| 3639 | printk("o"); |
| 3640 | else |
| 3641 | printk("r"); |
| 3642 | printk("PDISC port_id %Xh, WWN %08X", |
| 3643 | pLoggedInPort->port_id, ulBuff); |
| 3644 | |
| 3645 | ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32); |
| 3646 | printk("%08Xh\n", ulBuff); |
| 3647 | #endif |
| 3648 | |
| 3649 | |
| 3650 | |
| 3651 | break; |
| 3652 | |
| 3653 | |
| 3654 | |
| 3655 | case 0x1020L: // PRLI? |
| 3656 | case 0x1002L: // PRLI ACCept? |
| 3657 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&prli, sizeof(prli)); |
| 3658 | |
| 3659 | pLoggedInPort->fcp_info = prli.fcp_info; // target/initiator flags |
| 3660 | pLoggedInPort->prli = TRUE; // PLOGI resets, PDISC doesn't |
| 3661 | |
| 3662 | pLoggedInPort->pdisc = TRUE; // expect to send (or receive) PDISC |
| 3663 | // next time |
| 3664 | pLoggedInPort->LOGO_timer = 0; // will be set next LinkDown |
| 3665 | #ifdef WWN_DBG |
| 3666 | ulBuff = (ULONG)pLoggedInPort->u.liWWN; |
| 3667 | if( pLoggedInPort->Originator) |
| 3668 | printk("o"); |
| 3669 | else |
| 3670 | printk("r"); |
| 3671 | printk("PRLI port_id %Xh, WWN %08X", |
| 3672 | pLoggedInPort->port_id, ulBuff); |
| 3673 | |
| 3674 | ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32); |
| 3675 | printk("%08Xh\n", ulBuff); |
| 3676 | #endif |
| 3677 | |
| 3678 | break; |
| 3679 | |
| 3680 | } |
| 3681 | |
| 3682 | return; |
| 3683 | } |
| 3684 | |
| 3685 | |
| 3686 | |
| 3687 | |
| 3688 | |
| 3689 | |
| 3690 | static void BuildLinkServicePayload( PTACHYON fcChip, ULONG type, void* payload) |
| 3691 | { |
| 3692 | LOGIN_PAYLOAD *plogi; // FC-PH Port Login |
| 3693 | LOGIN_PAYLOAD PlogiPayload; // copy for BIG ENDIAN switch |
| 3694 | PRLI_REQUEST *prli; // FCP-SCSI Process Login |
| 3695 | PRLI_REQUEST PrliPayload; // copy for BIG ENDIAN switch |
| 3696 | LOGOUT_PAYLOAD *logo; |
| 3697 | LOGOUT_PAYLOAD LogoutPayload; |
| 3698 | // PRLO_REQUEST *prlo; |
| 3699 | // PRLO_REQUEST PrloPayload; |
| 3700 | REJECT_MESSAGE rjt, *prjt; |
| 3701 | |
| 3702 | memset( &PlogiPayload, 0, sizeof( PlogiPayload)); |
| 3703 | plogi = &PlogiPayload; // load into stack buffer, |
| 3704 | // then BIG-ENDIAN switch a copy to caller |
| 3705 | |
| 3706 | |
| 3707 | switch( type ) // payload type can be ELS_PLOGI, ELS_PRLI, ADISC, ... |
| 3708 | { |
| 3709 | case ELS_FDISC: |
| 3710 | case ELS_FLOGI: |
| 3711 | case ELS_PLOGI_ACC: // FC-PH PORT Login Accept |
| 3712 | case ELS_PLOGI: // FC-PH PORT Login |
| 3713 | case ELS_PDISC: // FC-PH2 Port Discovery - same payload as ELS_PLOGI |
| 3714 | plogi->login_cmd = LS_PLOGI; |
| 3715 | if( type == ELS_PDISC) |
| 3716 | plogi->login_cmd = LS_PDISC; |
| 3717 | else if( type == ELS_PLOGI_ACC ) |
| 3718 | plogi->login_cmd = LS_ACC; |
| 3719 | |
| 3720 | plogi->cmn_services.bb_credit = 0x00; |
| 3721 | plogi->cmn_services.lowest_ver = fcChip->lowest_FCPH_ver; |
| 3722 | plogi->cmn_services.highest_ver = fcChip->highest_FCPH_ver; |
| 3723 | plogi->cmn_services.bb_rx_size = TACHLITE_TS_RX_SIZE; |
| 3724 | plogi->cmn_services.common_features = CONTINUOSLY_INCREASING | |
| 3725 | RANDOM_RELATIVE_OFFSET; |
| 3726 | |
| 3727 | // fill in with World Wide Name based Port Name - 8 UCHARs |
| 3728 | // get from Tach registers WWN hi & lo |
| 3729 | LoadWWN( fcChip, plogi->port_name, 0); |
| 3730 | // fill in with World Wide Name based Node/Fabric Name - 8 UCHARs |
| 3731 | // get from Tach registers WWN hi & lo |
| 3732 | LoadWWN( fcChip, plogi->node_name, 1); |
| 3733 | |
| 3734 | // For Seagate Drives. |
| 3735 | // |
| 3736 | plogi->cmn_services.common_features |= 0x800; |
| 3737 | plogi->cmn_services.rel_offset = 0xFE; |
| 3738 | plogi->cmn_services.concurrent_seq = 1; |
| 3739 | plogi->class1.service_options = 0x00; |
| 3740 | plogi->class2.service_options = 0x00; |
| 3741 | plogi->class3.service_options = CLASS_VALID; |
| 3742 | plogi->class3.initiator_control = 0x00; |
| 3743 | plogi->class3.rx_data_size = MAX_RX_PAYLOAD; |
| 3744 | plogi->class3.recipient_control = |
| 3745 | ERROR_DISCARD | ONE_CATEGORY_SEQUENCE; |
| 3746 | plogi->class3.concurrent_sequences = 1; |
| 3747 | plogi->class3.open_sequences = 1; |
| 3748 | plogi->vendor_id[0] = 'C'; plogi->vendor_id[1] = 'Q'; |
| 3749 | plogi->vendor_version[0] = 'C'; plogi->vendor_version[1] = 'Q'; |
| 3750 | plogi->vendor_version[2] = ' '; plogi->vendor_version[3] = '0'; |
| 3751 | plogi->vendor_version[4] = '0'; plogi->vendor_version[5] = '0'; |
| 3752 | |
| 3753 | |
| 3754 | // FLOGI specific fields... (see FC-FLA, Rev 2.7, Aug 1999, sec 5.1) |
| 3755 | if( (type == ELS_FLOGI) || (type == ELS_FDISC) ) |
| 3756 | { |
| 3757 | if( type == ELS_FLOGI ) |
| 3758 | plogi->login_cmd = LS_FLOGI; |
| 3759 | else |
| 3760 | plogi->login_cmd = LS_FDISC; |
| 3761 | |
| 3762 | plogi->cmn_services.lowest_ver = 0x20; |
| 3763 | plogi->cmn_services.common_features = 0x0800; |
| 3764 | plogi->cmn_services.rel_offset = 0; |
| 3765 | plogi->cmn_services.concurrent_seq = 0; |
| 3766 | |
| 3767 | plogi->class3.service_options = 0x8800; |
| 3768 | plogi->class3.rx_data_size = 0; |
| 3769 | plogi->class3.recipient_control = 0; |
| 3770 | plogi->class3.concurrent_sequences = 0; |
| 3771 | plogi->class3.open_sequences = 0; |
| 3772 | } |
| 3773 | |
| 3774 | // copy back to caller's buff, w/ BIG ENDIAN swap |
| 3775 | BigEndianSwap( (UCHAR*)&PlogiPayload, payload, sizeof(PlogiPayload)); |
| 3776 | break; |
| 3777 | |
| 3778 | |
| 3779 | case ELS_ACC: // generic Extended Link Service ACCept |
| 3780 | plogi->login_cmd = LS_ACC; |
| 3781 | // copy back to caller's buff, w/ BIG ENDIAN swap |
| 3782 | BigEndianSwap( (UCHAR*)&PlogiPayload, payload, 4); |
| 3783 | break; |
| 3784 | |
| 3785 | |
| 3786 | |
| 3787 | case ELS_SCR: // Fabric State Change Registration |
| 3788 | { |
| 3789 | SCR_PL scr; // state change registration |
| 3790 | |
| 3791 | memset( &scr, 0, sizeof(scr)); |
| 3792 | |
| 3793 | scr.command = LS_SCR; // 0x62000000 |
| 3794 | // see FC-FLA, Rev 2.7, Table A.22 (pg 82) |
| 3795 | scr.function = 3; // 1 = Events detected by Fabric |
| 3796 | // 2 = N_Port detected registration |
| 3797 | // 3 = Full registration |
| 3798 | |
| 3799 | // copy back to caller's buff, w/ BIG ENDIAN swap |
| 3800 | BigEndianSwap( (UCHAR*)&scr, payload, sizeof(SCR_PL)); |
| 3801 | } |
| 3802 | |
| 3803 | break; |
| 3804 | |
| 3805 | |
| 3806 | case FCS_NSR: // Fabric Name Service Request |
| 3807 | { |
| 3808 | NSR_PL nsr; // Name Server Req. payload |
| 3809 | |
| 3810 | memset( &nsr, 0, sizeof(NSR_PL)); |
| 3811 | |
| 3812 | // see Brocade Fabric Programming Guide, |
| 3813 | // Rev 1.3, pg 4-44 |
| 3814 | nsr.CT_Rev = 0x01000000; |
| 3815 | nsr.FCS_Type = 0xFC020000; |
| 3816 | nsr.Command_code = 0x01710000; |
| 3817 | nsr.FCP = 8; |
| 3818 | |
| 3819 | // copy back to caller's buff, w/ BIG ENDIAN swap |
| 3820 | BigEndianSwap( (UCHAR*)&nsr, payload, sizeof(NSR_PL)); |
| 3821 | } |
| 3822 | |
| 3823 | break; |
| 3824 | |
| 3825 | |
| 3826 | |
| 3827 | |
| 3828 | case ELS_LOGO: // FC-PH PORT LogOut |
| 3829 | logo = &LogoutPayload; // load into stack buffer, |
| 3830 | // then BIG-ENDIAN switch a copy to caller |
| 3831 | logo->cmd = LS_LOGO; |
| 3832 | // load the 3 UCHARs of the node name |
| 3833 | // (if private loop, upper two UCHARs 0) |
| 3834 | logo->reserved = 0; |
| 3835 | |
| 3836 | logo->n_port_identifier[0] = (UCHAR)(fcChip->Registers.my_al_pa); |
| 3837 | logo->n_port_identifier[1] = |
| 3838 | (UCHAR)(fcChip->Registers.my_al_pa>>8); |
| 3839 | logo->n_port_identifier[2] = |
| 3840 | (UCHAR)(fcChip->Registers.my_al_pa>>16); |
| 3841 | // fill in with World Wide Name based Port Name - 8 UCHARs |
| 3842 | // get from Tach registers WWN hi & lo |
| 3843 | LoadWWN( fcChip, logo->port_name, 0); |
| 3844 | |
| 3845 | BigEndianSwap( (UCHAR*)&LogoutPayload, |
| 3846 | payload, sizeof(LogoutPayload) ); // 16 UCHAR struct |
| 3847 | break; |
| 3848 | |
| 3849 | |
| 3850 | case ELS_LOGO_ACC: // Logout Accept (FH-PH pg 149, table 74) |
| 3851 | logo = &LogoutPayload; // load into stack buffer, |
| 3852 | // then BIG-ENDIAN switch a copy to caller |
| 3853 | logo->cmd = LS_ACC; |
| 3854 | BigEndianSwap( (UCHAR*)&LogoutPayload, payload, 4 ); // 4 UCHAR cmnd |
| 3855 | break; |
| 3856 | |
| 3857 | |
| 3858 | case ELS_RJT: // ELS_RJT link service reject (FH-PH pg 155) |
| 3859 | |
| 3860 | prjt = (REJECT_MESSAGE*)payload; // pick up passed data |
| 3861 | rjt.command_code = ELS_RJT; |
| 3862 | // reverse fields, because of Swap that follows... |
| 3863 | rjt.vendor = prjt->reserved; // vendor specific |
| 3864 | rjt.explain = prjt->reason; // |
| 3865 | rjt.reason = prjt->explain; // |
| 3866 | rjt.reserved = prjt->vendor; // |
| 3867 | // BIG-ENDIAN switch a copy to caller |
| 3868 | BigEndianSwap( (UCHAR*)&rjt, payload, 8 ); // 8 UCHAR cmnd |
| 3869 | break; |
| 3870 | |
| 3871 | |
| 3872 | |
| 3873 | |
| 3874 | |
| 3875 | case ELS_PRLI_ACC: // Process Login ACCept |
| 3876 | case ELS_PRLI: // Process Login |
| 3877 | case ELS_PRLO: // Process Logout |
| 3878 | memset( &PrliPayload, 0, sizeof( PrliPayload)); |
| 3879 | prli = &PrliPayload; // load into stack buffer, |
| 3880 | |
| 3881 | if( type == ELS_PRLI ) |
| 3882 | prli->cmd = 0x20; // Login |
| 3883 | else if( type == ELS_PRLO ) |
| 3884 | prli->cmd = 0x21; // Logout |
| 3885 | else if( type == ELS_PRLI_ACC ) |
| 3886 | { |
| 3887 | prli->cmd = 0x02; // Login ACCept |
| 3888 | prli->valid = REQUEST_EXECUTED; |
| 3889 | } |
| 3890 | |
| 3891 | |
| 3892 | prli->valid |= SCSI_FCP | ESTABLISH_PAIR; |
| 3893 | prli->fcp_info = READ_XFER_RDY; |
| 3894 | prli->page_length = 0x10; |
| 3895 | prli->payload_length = 20; |
| 3896 | // Can be initiator AND target |
| 3897 | |
| 3898 | if( fcChip->Options.initiator ) |
| 3899 | prli->fcp_info |= INITIATOR_FUNCTION; |
| 3900 | if( fcChip->Options.target ) |
| 3901 | prli->fcp_info |= TARGET_FUNCTION; |
| 3902 | |
| 3903 | BigEndianSwap( (UCHAR*)&PrliPayload, payload, prli->payload_length); |
| 3904 | break; |
| 3905 | |
| 3906 | |
| 3907 | |
| 3908 | default: // no can do - programming error |
| 3909 | printk(" BuildLinkServicePayload unknown!\n"); |
| 3910 | break; |
| 3911 | } |
| 3912 | } |
| 3913 | |
| 3914 | // loads 8 UCHARs for PORT name or NODE name base on |
| 3915 | // controller's WWN. |
| 3916 | void LoadWWN( PTACHYON fcChip, UCHAR* dest, UCHAR type) |
| 3917 | { |
| 3918 | UCHAR* bPtr, i; |
| 3919 | |
| 3920 | switch( type ) |
| 3921 | { |
| 3922 | case 0: // Port_Name |
| 3923 | bPtr = (UCHAR*)&fcChip->Registers.wwn_hi; |
| 3924 | for( i =0; i<4; i++) |
| 3925 | dest[i] = *bPtr++; |
| 3926 | bPtr = (UCHAR*)&fcChip->Registers.wwn_lo; |
| 3927 | for( i =4; i<8; i++) |
| 3928 | dest[i] = *bPtr++; |
| 3929 | break; |
| 3930 | case 1: // Node/Fabric _Name |
| 3931 | bPtr = (UCHAR*)&fcChip->Registers.wwn_hi; |
| 3932 | for( i =0; i<4; i++) |
| 3933 | dest[i] = *bPtr++; |
| 3934 | bPtr = (UCHAR*)&fcChip->Registers.wwn_lo; |
| 3935 | for( i =4; i<8; i++) |
| 3936 | dest[i] = *bPtr++; |
| 3937 | break; |
| 3938 | } |
| 3939 | |
| 3940 | } |
| 3941 | |
| 3942 | |
| 3943 | |
| 3944 | // We check the Port Login payload for required values. Note that |
| 3945 | // ELS_PLOGI and ELS_PDISC (Port DISCover) use the same payload. |
| 3946 | |
| 3947 | |
| 3948 | int verify_PLOGI( PTACHYON fcChip, |
| 3949 | TachFCHDR_GCMND* fchs, |
| 3950 | ULONG* reject_explain) |
| 3951 | { |
| 3952 | LOGIN_PAYLOAD login; |
| 3953 | |
| 3954 | // source, dest, len (should be mult. of 4) |
| 3955 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&login, sizeof(login)); |
| 3956 | |
| 3957 | // check FC version |
| 3958 | // if other port's highest supported version |
| 3959 | // is less than our lowest, and |
| 3960 | // if other port's lowest |
| 3961 | if( login.cmn_services.highest_ver < fcChip->lowest_FCPH_ver || |
| 3962 | login.cmn_services.lowest_ver > fcChip->highest_FCPH_ver ) |
| 3963 | { |
| 3964 | *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, OPTIONS_ERROR); |
| 3965 | return LOGICAL_ERROR; |
| 3966 | } |
| 3967 | |
| 3968 | // Receive Data Field Size must be >=128 |
| 3969 | // per FC-PH |
| 3970 | if (login.cmn_services.bb_rx_size < 128) |
| 3971 | { |
| 3972 | *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, DATA_FIELD_SIZE_ERROR); |
| 3973 | return LOGICAL_ERROR; |
| 3974 | } |
| 3975 | |
| 3976 | // Only check Class 3 params |
| 3977 | if( login.class3.service_options & CLASS_VALID) |
| 3978 | { |
| 3979 | if (login.class3.rx_data_size < 128) |
| 3980 | { |
| 3981 | *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, INVALID_CSP); |
| 3982 | return LOGICAL_ERROR; |
| 3983 | } |
| 3984 | if( login.class3.initiator_control & XID_REQUIRED) |
| 3985 | { |
| 3986 | *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, INITIATOR_CTL_ERROR); |
| 3987 | return LOGICAL_ERROR; |
| 3988 | } |
| 3989 | } |
| 3990 | return 0; // success |
| 3991 | } |
| 3992 | |
| 3993 | |
| 3994 | |
| 3995 | |
| 3996 | int verify_PRLI( TachFCHDR_GCMND* fchs, ULONG* reject_explain) |
| 3997 | { |
| 3998 | PRLI_REQUEST prli; // buffer for BIG ENDIAN |
| 3999 | |
| 4000 | // source, dest, len (should be mult. of 4) |
| 4001 | BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&prli, sizeof(prli)); |
| 4002 | |
| 4003 | if( prli.fcp_info == 0 ) // i.e., not target or initiator? |
| 4004 | { |
| 4005 | *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, OPTIONS_ERROR); |
| 4006 | return LOGICAL_ERROR; |
| 4007 | } |
| 4008 | |
| 4009 | return 0; // success |
| 4010 | } |
| 4011 | |
| 4012 | |
| 4013 | // SWAP UCHARs as required by Fibre Channel (i.e. BIG ENDIAN) |
| 4014 | // INPUTS: |
| 4015 | // source - ptr to LITTLE ENDIAN ULONGS |
| 4016 | // cnt - number of UCHARs to switch (should be mult. of ULONG) |
| 4017 | // OUTPUTS: |
| 4018 | // dest - ptr to BIG ENDIAN copy |
| 4019 | // RETURN: |
| 4020 | // none |
| 4021 | // |
| 4022 | void BigEndianSwap( UCHAR *source, UCHAR *dest, USHORT cnt) |
| 4023 | { |
| 4024 | int i,j; |
| 4025 | |
| 4026 | source+=3; // start at MSB of 1st ULONG |
| 4027 | for( j=0; j < cnt; j+=4, source+=4, dest+=4) // every ULONG |
| 4028 | { |
| 4029 | for( i=0; i<4; i++) // every UCHAR in ULONG |
| 4030 | *(dest+i) = *(source-i); |
| 4031 | } |
| 4032 | } |
| 4033 | |
| 4034 | |
| 4035 | |
| 4036 | |
| 4037 | // Build FC Exchanges............ |
| 4038 | |
| 4039 | static void buildFCPstatus( |
| 4040 | PTACHYON fcChip, |
| 4041 | ULONG ExchangeID); |
| 4042 | |
| 4043 | static LONG FindFreeExchange( PTACHYON fcChip, ULONG type ); |
| 4044 | |
| 4045 | static ULONG build_SEST_sgList( |
| 4046 | struct pci_dev *pcidev, |
| 4047 | ULONG *SESTalPairStart, |
| 4048 | Scsi_Cmnd *Cmnd, |
| 4049 | ULONG *sgPairs, |
| 4050 | PSGPAGES *sgPages_head // link list of TL Ext. S/G pages from O/S Pool |
| 4051 | ); |
| 4052 | |
| 4053 | static int build_FCP_payload( Scsi_Cmnd *Cmnd, |
| 4054 | UCHAR* payload, ULONG type, ULONG fcp_dl ); |
| 4055 | |
| 4056 | |
| 4057 | /* |
| 4058 | IRB |
| 4059 | ERQ __________________ |
| 4060 | | | / | Req_A_SFS_Len | ____________________ |
| 4061 | |----------| / | Req_A_SFS_Addr |------->| Reserved | |
| 4062 | | IRB | / | Req_A_D_ID | | SOF EOF TimeStamp | |
| 4063 | |-----------/ | Req_A_SEST_Index |-+ | R_CTL | D_ID | |
| 4064 | | IRB | | Req_B... | | | CS_CTL| S_ID | |
| 4065 | |-----------\ | | | | TYPE | F_CTL | |
| 4066 | | IRB | \ | | | | SEQ_ID | SEQ_CNT | |
| 4067 | |----------- \ | | +-->+--| OX_ID | RX_ID | |
| 4068 | | | \ |__________________| | | RO | |
| 4069 | | | pl (payload/cmnd) | |
| 4070 | | | ..... | |
| 4071 | | |___________________| |
| 4072 | | |
| 4073 | | |
| 4074 | +-------------------------------------------+ |
| 4075 | | |
| 4076 | | |
| 4077 | | e.g. IWE |
| 4078 | | SEST __________________ for FCP_DATA |
| 4079 | | | | / | | Hdr_Len | ____________________ |
| 4080 | | |----------| / | Hdr_Addr_Addr |------->| Reserved | |
| 4081 | | | [0] | / |Remote_ID| RSP_Len| | SOF EOF TimeStamp | |
| 4082 | | |-----------/ | RSP_Addr |---+ | R_CTL | D_ID | |
| 4083 | +-> [1] | | | Buff_Off | | | CS_CTL| S_ID | |
| 4084 | |-----------\ |BuffIndex| Link | | | TYPE | F_CTL | |
| 4085 | | [2] | \ | Rsvd | RX_ID | | | SEQ_ID | SEQ_CNT | |
| 4086 | |----------- \ | Data_Len | | | OX_ID | RX_ID | |
| 4087 | | ... | \ | Exp_RO | | | RO | |
| 4088 | |----------| | Exp_Byte_Cnt | | |___________________| |
| 4089 | | SEST_LEN | +--| Len | | |
| 4090 | |__________| | | Address | | |
| 4091 | | | ... | | for FCP_RSP |
| 4092 | | |__________________| | ____________________ |
| 4093 | | +----| Reserved | |
| 4094 | | | SOF EOF TimeStamp | |
| 4095 | | | R_CTL | D_ID | |
| 4096 | | | CS_CTL| S_ID | |
| 4097 | +--- local or extended | .... | |
| 4098 | scatter/gather lists |
| 4099 | defining upper-layer |
| 4100 | data (e.g. from user's App) |
| 4101 | |
| 4102 | |
| 4103 | */ |
| 4104 | // All TachLite commands must start with a SFS (Single Frame Sequence) |
| 4105 | // command. In the simplest case (a NOP Basic Link command), |
| 4106 | // only one frame header and ERQ entry is required. The most complex |
| 4107 | // case is the SCSI assisted command, which requires an ERQ entry, |
| 4108 | // SEST entry, and several frame headers and data buffers all |
| 4109 | // logically linked together. |
| 4110 | // Inputs: |
| 4111 | // cpqfcHBAdata - controller struct |
| 4112 | // type - PLOGI, SCSI_IWE, etc. |
| 4113 | // InFCHS - Incoming Tachlite FCHS which prompted this exchange |
| 4114 | // (only s_id set if we are originating) |
| 4115 | // Data - PVOID to data struct consistent with "type" |
| 4116 | // fcExchangeIndex - pointer to OX/RD ID value of built exchange |
| 4117 | // Return: |
| 4118 | // fcExchangeIndex - OX/RD ID value if successful |
| 4119 | // 0 - success |
| 4120 | // INVALID_ARGS - NULL/ invalid passed args |
| 4121 | // BAD_ALPA - Bad source al_pa address |
| 4122 | // LNKDWN_OSLS - Link Down (according to this controller) |
| 4123 | // OUTQUE_FULL - Outbound Que full |
| 4124 | // DRIVERQ_FULL - controller's Exchange array full |
| 4125 | // SEST_FULL - SEST table full |
| 4126 | // |
| 4127 | // Remarks: |
| 4128 | // Psuedo code: |
| 4129 | // Check for NULL pointers / bad args |
| 4130 | // Build outgoing FCHS - the header/payload struct |
| 4131 | // Build IRB (for ERQ entry) |
| 4132 | // if SCSI command, build SEST entry (e.g. IWE, TRE,...) |
| 4133 | // return success |
| 4134 | |
| 4135 | //sbuildex |
| 4136 | ULONG cpqfcTSBuildExchange( |
| 4137 | CPQFCHBA *cpqfcHBAdata, |
| 4138 | ULONG type, // e.g. PLOGI |
| 4139 | TachFCHDR_GCMND* InFCHS, // incoming FCHS |
| 4140 | void *Data, // the CDB, scatter/gather, etc. |
| 4141 | LONG *fcExchangeIndex ) // points to allocated exchange, |
| 4142 | { |
| 4143 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 4144 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 4145 | ULONG ulStatus = 0; // assume OK |
| 4146 | USHORT ox_ID, rx_ID=0xFFFF; |
| 4147 | ULONG SfsLen=0L; |
| 4148 | TachLiteIRB* pIRB; |
| 4149 | IRBflags IRB_flags; |
| 4150 | UCHAR *pIRB_flags = (UCHAR*)&IRB_flags; |
| 4151 | TachFCHDR_GCMND* CMDfchs; |
| 4152 | TachFCHDR* dataHDR; // 32 byte HEADER ONLY FCP-DATA buffer |
| 4153 | TachFCHDR_RSP* rspHDR; // 32 byte header + RSP payload |
| 4154 | Scsi_Cmnd *Cmnd = (Scsi_Cmnd*)Data; // Linux Scsi CDB, S/G, ... |
| 4155 | TachLiteIWE* pIWE; |
| 4156 | TachLiteIRE* pIRE; |
| 4157 | TachLiteTWE* pTWE; |
| 4158 | TachLiteTRE* pTRE; |
| 4159 | ULONG fcp_dl; // total byte length of DATA transferred |
| 4160 | ULONG fl; // frame length (FC frame size, 128, 256, 512, 1024) |
| 4161 | ULONG sgPairs; // number of valid scatter/gather pairs |
| 4162 | int FCP_SCSI_command; |
| 4163 | BA_ACC_PAYLOAD *ba_acc; |
| 4164 | BA_RJT_PAYLOAD *ba_rjt; |
| 4165 | |
| 4166 | // check passed ARGS |
| 4167 | if( !fcChip->ERQ ) // NULL ptr means uninitialized Tachlite chip |
| 4168 | return INVALID_ARGS; |
| 4169 | |
| 4170 | |
| 4171 | if( type == SCSI_IRE || |
| 4172 | type == SCSI_TRE || |
| 4173 | type == SCSI_IWE || |
| 4174 | type == SCSI_TWE) |
| 4175 | FCP_SCSI_command = 1; |
| 4176 | |
| 4177 | else |
| 4178 | FCP_SCSI_command = 0; |
| 4179 | |
| 4180 | |
| 4181 | // for commands that pass payload data (e.g. SCSI write) |
| 4182 | // examine command struct - verify that the |
| 4183 | // length of s/g buffers is adequate for total payload |
| 4184 | // length (end of list is NULL address) |
| 4185 | |
| 4186 | if( FCP_SCSI_command ) |
| 4187 | { |
| 4188 | if( Data ) // must have data descriptor (S/G list -- at least |
| 4189 | // one address with at least 1 byte of data) |
| 4190 | { |
| 4191 | // something to do (later)? |
| 4192 | } |
| 4193 | |
| 4194 | else |
| 4195 | return INVALID_ARGS; // invalid DATA ptr |
| 4196 | } |
| 4197 | |
| 4198 | |
| 4199 | |
| 4200 | // we can build an Exchange for later Queuing (on the TL chip) |
| 4201 | // if an empty slot is available in the DevExt for this controller |
| 4202 | // look for available Exchange slot... |
| 4203 | |
| 4204 | if( type != FCP_RESPONSE && |
| 4205 | type != BLS_ABTS && |
| 4206 | type != BLS_ABTS_ACC ) // already have Exchange slot! |
| 4207 | *fcExchangeIndex = FindFreeExchange( fcChip, type ); |
| 4208 | |
| 4209 | if( *fcExchangeIndex != -1 ) // Exchange is available? |
| 4210 | { |
| 4211 | // assign tmp ptr (shorthand) |
| 4212 | CMDfchs = &Exchanges->fcExchange[ *fcExchangeIndex].fchs; |
| 4213 | |
| 4214 | if( Cmnd != NULL ) // (necessary for ABTS cases) |
| 4215 | { |
| 4216 | Exchanges->fcExchange[ *fcExchangeIndex].Cmnd = Cmnd; // Linux Scsi |
| 4217 | Exchanges->fcExchange[ *fcExchangeIndex].pLoggedInPort = |
| 4218 | fcFindLoggedInPort( fcChip, |
| 4219 | Exchanges->fcExchange[ *fcExchangeIndex].Cmnd, // find Scsi Nexus |
| 4220 | 0, // DON'T search linked list for FC port id |
| 4221 | NULL, // DON'T search linked list for FC WWN |
| 4222 | NULL); // DON'T care about end of list |
| 4223 | |
| 4224 | } |
| 4225 | |
| 4226 | |
| 4227 | // Build the command frame header (& data) according |
| 4228 | // to command type |
| 4229 | |
| 4230 | // fields common for all SFS frame types |
| 4231 | CMDfchs->reserved = 0L; // must clear |
| 4232 | CMDfchs->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; LCr=0, no TS |
| 4233 | |
| 4234 | // get the destination port_id from incoming FCHS |
| 4235 | // (initialized before calling if we're Originator) |
| 4236 | // Frame goes to port it was from - the source_id |
| 4237 | |
| 4238 | CMDfchs->d_id = InFCHS->s_id &0xFFFFFF; // destination (add R_CTL later) |
| 4239 | CMDfchs->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0 |
| 4240 | |
| 4241 | |
| 4242 | // now enter command-specific fields |
| 4243 | switch( type ) |
| 4244 | { |
| 4245 | |
| 4246 | case BLS_NOP: // FC defined basic link service command NO-OP |
| 4247 | // ensure unique X_IDs! (use tracking function) |
| 4248 | |
| 4249 | *pIRB_flags = 0; // clear IRB flags |
| 4250 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4251 | SfsLen = *pIRB_flags; |
| 4252 | |
| 4253 | SfsLen <<= 24; // shift flags to MSB |
| 4254 | SfsLen += 32L; // add len to LSB (header only - no payload) |
| 4255 | |
| 4256 | // TYPE[31-24] 00 Basic Link Service |
| 4257 | // f_ctl[23:0] exchg originator, 1st seq, xfer S.I. |
| 4258 | CMDfchs->d_id |= 0x80000000L; // R_CTL = 80 for NOP (Basic Link Ser.) |
| 4259 | CMDfchs->f_ctl = 0x00310000L; // xchng originator, 1st seq,.... |
| 4260 | CMDfchs->seq_cnt = 0x0L; |
| 4261 | CMDfchs->ox_rx_id = 0xFFFF; // RX_ID for now; OX_ID on start |
| 4262 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4263 | CMDfchs->pl[0] = 0xaabbccddL; // words 8-15 frame data payload (n/a) |
| 4264 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 1; // seconds |
| 4265 | // (NOP should complete ~instantly) |
| 4266 | break; |
| 4267 | |
| 4268 | |
| 4269 | |
| 4270 | |
| 4271 | case BLS_ABTS_ACC: // Abort Sequence ACCept |
| 4272 | *pIRB_flags = 0; // clear IRB flags |
| 4273 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4274 | SfsLen = *pIRB_flags; |
| 4275 | |
| 4276 | SfsLen <<= 24; // shift flags to MSB |
| 4277 | SfsLen += 32 + 12; // add len to LSB (header + 3 DWORD payload) |
| 4278 | |
| 4279 | CMDfchs->d_id |= 0x84000000L; // R_CTL = 84 for BASIC ACCept |
| 4280 | // TYPE[31-24] 00 Basic Link Service |
| 4281 | // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I. |
| 4282 | CMDfchs->f_ctl = 0x00910000L; // xchnge responder, last seq, xfer SI |
| 4283 | // CMDfchs->seq_id & count might be set from DataHdr? |
| 4284 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4285 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 5; // seconds |
| 4286 | // (Timeout in case of weird error) |
| 4287 | |
| 4288 | // now set the ACCept payload... |
| 4289 | ba_acc = (BA_ACC_PAYLOAD*)&CMDfchs->pl[0]; |
| 4290 | memset( ba_acc, 0, sizeof( BA_ACC_PAYLOAD)); |
| 4291 | // Since PLDA requires (only) entire Exchange aborts, we don't need |
| 4292 | // to worry about what the last sequence was. |
| 4293 | |
| 4294 | // We expect that a "target" task is accepting the abort, so we |
| 4295 | // can use the OX/RX ID pair |
| 4296 | ba_acc->ox_rx_id = CMDfchs->ox_rx_id; |
| 4297 | |
| 4298 | // source, dest, #bytes |
| 4299 | BigEndianSwap((UCHAR *)&CMDfchs->ox_rx_id, (UCHAR *)&ba_acc->ox_rx_id, 4); |
| 4300 | |
| 4301 | ba_acc->low_seq_cnt = 0; |
| 4302 | ba_acc->high_seq_cnt = 0xFFFF; |
| 4303 | |
| 4304 | |
| 4305 | break; |
| 4306 | |
| 4307 | |
| 4308 | case BLS_ABTS_RJT: // Abort Sequence ACCept |
| 4309 | *pIRB_flags = 0; // clear IRB flags |
| 4310 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4311 | SfsLen = *pIRB_flags; |
| 4312 | |
| 4313 | SfsLen <<= 24; // shift flags to MSB |
| 4314 | SfsLen += 32 + 12; // add len to LSB (header + 3 DWORD payload) |
| 4315 | |
| 4316 | CMDfchs->d_id |= 0x85000000L; // R_CTL = 85 for BASIC ReJecT |
| 4317 | // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I. |
| 4318 | // TYPE[31-24] 00 Basic Link Service |
| 4319 | CMDfchs->f_ctl = 0x00910000L; // xchnge responder, last seq, xfer SI |
| 4320 | // CMDfchs->seq_id & count might be set from DataHdr? |
| 4321 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4322 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 5; // seconds |
| 4323 | // (Timeout in case of weird error) |
| 4324 | |
| 4325 | CMDfchs->ox_rx_id = InFCHS->ox_rx_id; // copy from sender! |
| 4326 | |
| 4327 | // now set the ReJecT payload... |
| 4328 | ba_rjt = (BA_RJT_PAYLOAD*)&CMDfchs->pl[0]; |
| 4329 | memset( ba_rjt, 0, sizeof( BA_RJT_PAYLOAD)); |
| 4330 | |
| 4331 | // We expect that a "target" task couldn't find the Exhange in the |
| 4332 | // array of active exchanges, so we use a new LinkService X_ID. |
| 4333 | // See Reject payload description in FC-PH (Rev 4.3), pg. 140 |
| 4334 | ba_rjt->reason_code = 0x09; // "unable to perform command request" |
| 4335 | ba_rjt->reason_explain = 0x03; // invalid OX/RX ID pair |
| 4336 | |
| 4337 | |
| 4338 | break; |
| 4339 | |
| 4340 | |
| 4341 | case BLS_ABTS: // FC defined basic link service command ABTS |
| 4342 | // Abort Sequence |
| 4343 | |
| 4344 | |
| 4345 | *pIRB_flags = 0; // clear IRB flags |
| 4346 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4347 | SfsLen = *pIRB_flags; |
| 4348 | |
| 4349 | SfsLen <<= 24; // shift flags to MSB |
| 4350 | SfsLen += 32L; // add len to LSB (header only - no payload) |
| 4351 | |
| 4352 | // TYPE[31-24] 00 Basic Link Service |
| 4353 | // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I. |
| 4354 | CMDfchs->d_id |= 0x81000000L; // R_CTL = 81 for ABTS |
| 4355 | CMDfchs->f_ctl = 0x00110000L; // xchnge originator, last seq, xfer SI |
| 4356 | // CMDfchs->seq_id & count might be set from DataHdr? |
| 4357 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4358 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds |
| 4359 | // (ABTS must timeout when responder is gone) |
| 4360 | break; |
| 4361 | |
| 4362 | |
| 4363 | |
| 4364 | case FCS_NSR: // Fabric Name Service Request |
| 4365 | Exchanges->fcExchange[ *fcExchangeIndex].reTries = 2; |
| 4366 | |
| 4367 | |
| 4368 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds |
| 4369 | // OX_ID, linked to Driver Transaction ID |
| 4370 | // (fix-up at Queing time) |
| 4371 | CMDfchs->ox_rx_id = 0xFFFF; // RX_ID - Responder (target) to modify |
| 4372 | // OX_ID set at ERQueing time |
| 4373 | *pIRB_flags = 0; // clear IRB flags |
| 4374 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4375 | SfsLen = *pIRB_flags; |
| 4376 | |
| 4377 | SfsLen <<= 24; // shift flags to MSB |
| 4378 | SfsLen += (32L + sizeof(NSR_PL)); // add len (header & NSR payload) |
| 4379 | |
| 4380 | CMDfchs->d_id |= 0x02000000L; // R_CTL = 02 for - |
| 4381 | // Name Service Request: Unsolicited |
| 4382 | // TYPE[31-24] 01 Extended Link Service |
| 4383 | // f_ctl[23:0] exchg originator, 1st seq, xfer S.I. |
| 4384 | CMDfchs->f_ctl = 0x20210000L; |
| 4385 | // OX_ID will be fixed-up at Tachyon enqueing time |
| 4386 | CMDfchs->seq_cnt = 0; // seq ID, DF_ctl, seq cnt |
| 4387 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4388 | |
| 4389 | BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]); |
| 4390 | |
| 4391 | |
| 4392 | |
| 4393 | |
| 4394 | |
| 4395 | |
| 4396 | break; |
| 4397 | |
| 4398 | |
| 4399 | |
| 4400 | |
| 4401 | case ELS_PLOGI: // FC-PH extended link service command Port Login |
| 4402 | // (May, 2000) |
| 4403 | // NOTE! This special case facilitates SANMark testing. The SANMark |
| 4404 | // test script for initialization-timeout.fcal.SANMark-1.fc |
| 4405 | // "eats" the OPN() primitive without issuing an R_RDY, causing |
| 4406 | // Tachyon to report LST (loop state timeout), which causes a |
| 4407 | // LIP. To avoid this, simply send out the frame (i.e. assuming a |
| 4408 | // buffer credit of 1) without waiting for R_RDY. Many FC devices |
| 4409 | // (other than Tachyon) have been doing this for years. We don't |
| 4410 | // ever want to do this for non-Link Service frames unless the |
| 4411 | // other device really did report non-zero login BB credit (i.e. |
| 4412 | // in the PLOGI ACCept frame). |
| 4413 | // CMDfchs->sof_eof |= 0x00000400L; // LCr=1 |
| 4414 | |
| 4415 | case ELS_FDISC: // Fabric Discovery (Login) |
| 4416 | case ELS_FLOGI: // Fabric Login |
| 4417 | case ELS_SCR: // Fabric State Change Registration |
| 4418 | case ELS_LOGO: // FC-PH extended link service command Port Logout |
| 4419 | case ELS_PDISC: // FC-PH extended link service cmnd Port Discovery |
| 4420 | case ELS_PRLI: // FC-PH extended link service cmnd Process Login |
| 4421 | |
| 4422 | Exchanges->fcExchange[ *fcExchangeIndex].reTries = 2; |
| 4423 | |
| 4424 | |
| 4425 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds |
| 4426 | // OX_ID, linked to Driver Transaction ID |
| 4427 | // (fix-up at Queing time) |
| 4428 | CMDfchs->ox_rx_id = 0xFFFF; // RX_ID - Responder (target) to modify |
| 4429 | // OX_ID set at ERQueing time |
| 4430 | *pIRB_flags = 0; // clear IRB flags |
| 4431 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4432 | SfsLen = *pIRB_flags; |
| 4433 | |
| 4434 | SfsLen <<= 24; // shift flags to MSB |
| 4435 | if( type == ELS_LOGO ) |
| 4436 | SfsLen += (32L + 16L); // add len (header & PLOGI payload) |
| 4437 | else if( type == ELS_PRLI ) |
| 4438 | SfsLen += (32L + 20L); // add len (header & PRLI payload) |
| 4439 | else if( type == ELS_SCR ) |
| 4440 | SfsLen += (32L + sizeof(SCR_PL)); // add len (header & SCR payload) |
| 4441 | else |
| 4442 | SfsLen += (32L + 116L); // add len (header & PLOGI payload) |
| 4443 | |
| 4444 | CMDfchs->d_id |= 0x22000000L; // R_CTL = 22 for - |
| 4445 | // Extended Link_Data: Unsolicited Control |
| 4446 | // TYPE[31-24] 01 Extended Link Service |
| 4447 | // f_ctl[23:0] exchg originator, 1st seq, xfer S.I. |
| 4448 | CMDfchs->f_ctl = 0x01210000L; |
| 4449 | // OX_ID will be fixed-up at Tachyon enqueing time |
| 4450 | CMDfchs->seq_cnt = 0; // seq ID, DF_ctl, seq cnt |
| 4451 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4452 | |
| 4453 | BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]); |
| 4454 | |
| 4455 | break; |
| 4456 | |
| 4457 | |
| 4458 | |
| 4459 | case ELS_LOGO_ACC: // FC-PH extended link service logout accept |
| 4460 | case ELS_RJT: // extended link service reject (add reason) |
| 4461 | case ELS_ACC: // ext. link service generic accept |
| 4462 | case ELS_PLOGI_ACC:// ext. link service login accept (PLOGI or PDISC) |
| 4463 | case ELS_PRLI_ACC: // ext. link service process login accept |
| 4464 | |
| 4465 | |
| 4466 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 1; // assume done |
| 4467 | // ensure unique X_IDs! (use tracking function) |
| 4468 | // OX_ID from initiator cmd |
| 4469 | ox_ID = (USHORT)(InFCHS->ox_rx_id >> 16); |
| 4470 | rx_ID = 0xFFFF; // RX_ID, linked to Driver Exchange ID |
| 4471 | |
| 4472 | *pIRB_flags = 0; // clear IRB flags |
| 4473 | IRB_flags.SFA = 1; // send SFS (not SEST index) |
| 4474 | SfsLen = *pIRB_flags; |
| 4475 | |
| 4476 | SfsLen <<= 24; // shift flags to MSB |
| 4477 | if( type == ELS_RJT ) |
| 4478 | { |
| 4479 | SfsLen += (32L + 8L); // add len (header + payload) |
| 4480 | |
| 4481 | // ELS_RJT reason codes (utilize unused "reserved" field) |
| 4482 | CMDfchs->pl[0] = 1; |
| 4483 | CMDfchs->pl[1] = InFCHS->reserved; |
| 4484 | |
| 4485 | } |
| 4486 | else if( (type == ELS_LOGO_ACC) || (type == ELS_ACC) ) |
| 4487 | SfsLen += (32L + 4L); // add len (header + payload) |
| 4488 | else if( type == ELS_PLOGI_ACC ) |
| 4489 | SfsLen += (32L + 116L); // add len (header + payload) |
| 4490 | else if( type == ELS_PRLI_ACC ) |
| 4491 | SfsLen += (32L + 20L); // add len (header + payload) |
| 4492 | |
| 4493 | CMDfchs->d_id |= 0x23000000L; // R_CTL = 23 for - |
| 4494 | // Extended Link_Data: Control Reply |
| 4495 | // TYPE[31-24] 01 Extended Link Service |
| 4496 | // f_ctl[23:0] exchg responder, last seq, e_s, tsi |
| 4497 | CMDfchs->f_ctl = 0x01990000L; |
| 4498 | CMDfchs->seq_cnt = 0x0L; |
| 4499 | CMDfchs->ox_rx_id = 0L; // clear |
| 4500 | CMDfchs->ox_rx_id = ox_ID; // load upper 16 bits |
| 4501 | CMDfchs->ox_rx_id <<= 16; // shift them |
| 4502 | |
| 4503 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4504 | |
| 4505 | BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]); |
| 4506 | |
| 4507 | break; |
| 4508 | |
| 4509 | |
| 4510 | // Fibre Channel SCSI 'originator' sequences... |
| 4511 | // (originator means 'initiator' in FCP-SCSI) |
| 4512 | |
| 4513 | case SCSI_IWE: // TachLite Initiator Write Entry |
| 4514 | { |
| 4515 | PFC_LOGGEDIN_PORT pLoggedInPort = |
| 4516 | Exchanges->fcExchange[ *fcExchangeIndex].pLoggedInPort; |
| 4517 | |
| 4518 | Exchanges->fcExchange[ *fcExchangeIndex].reTries = 1; |
| 4519 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 7; // FC2 timeout |
| 4520 | |
| 4521 | // first, build FCP_CMND |
| 4522 | // unique X_ID fix-ups in StartExchange |
| 4523 | |
| 4524 | *pIRB_flags = 0; // clear IRB flags |
| 4525 | IRB_flags.SFA = 1; // send SFS FCP-CMND (not SEST index) |
| 4526 | |
| 4527 | // NOTE: unlike FC LinkService login frames, normal |
| 4528 | // SCSI commands are sent without outgoing verification |
| 4529 | IRB_flags.DCM = 1; // Disable completion message for Cmnd frame |
| 4530 | SfsLen = *pIRB_flags; |
| 4531 | |
| 4532 | SfsLen <<= 24; // shift flags to MSB |
| 4533 | SfsLen += 64L; // add len to LSB (header & CMND payload) |
| 4534 | |
| 4535 | CMDfchs->d_id |= (0x06000000L); // R_CTL = 6 for command |
| 4536 | |
| 4537 | // TYPE[31-24] 8 for FCP SCSI |
| 4538 | // f_ctl[23:0] exchg originator, 1st seq, xfer S.I. |
| 4539 | // valid RO |
| 4540 | CMDfchs->f_ctl = 0x08210008L; |
| 4541 | CMDfchs->seq_cnt = 0x0L; |
| 4542 | CMDfchs->ox_rx_id = 0L; // clear for now (-or- in later) |
| 4543 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4544 | |
| 4545 | // now, fill out FCP-DATA header |
| 4546 | // (use buffer inside SEST object) |
| 4547 | dataHDR = &fcChip->SEST->DataHDR[ *fcExchangeIndex ]; |
| 4548 | dataHDR->reserved = 0L; // must clear |
| 4549 | dataHDR->sof_eof = 0x75002000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS |
| 4550 | dataHDR->d_id = (InFCHS->s_id | 0x01000000L); // R_CTL= FCP_DATA |
| 4551 | dataHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0 |
| 4552 | // TYPE[31-24] 8 for FCP SCSI |
| 4553 | // f_ctl[23:0] xfer S.I.| valid RO |
| 4554 | dataHDR->f_ctl = 0x08010008L; |
| 4555 | dataHDR->seq_cnt = 0x02000000L; // sequence ID: df_ctl : seqence count |
| 4556 | dataHDR->ox_rx_id = 0L; // clear; fix-up dataHDR fields later |
| 4557 | dataHDR->ro = 0x0L; // relative offset (n/a) |
| 4558 | |
| 4559 | // Now setup the SEST entry |
| 4560 | pIWE = &fcChip->SEST->u[ *fcExchangeIndex ].IWE; |
| 4561 | |
| 4562 | // fill out the IWE: |
| 4563 | |
| 4564 | // VALid entry:Dir outbound:DCM:enable CM:enal INT: FC frame len |
| 4565 | pIWE->Hdr_Len = 0x8e000020L; // data frame Len always 32 bytes |
| 4566 | |
| 4567 | |
| 4568 | // from login parameters with other port, what's the largest frame |
| 4569 | // we can send? |
| 4570 | if( pLoggedInPort == NULL) |
| 4571 | { |
| 4572 | ulStatus = INVALID_ARGS; // failed! give up |
| 4573 | break; |
| 4574 | } |
| 4575 | if( pLoggedInPort->rx_data_size >= 2048) |
| 4576 | fl = 0x00020000; // 2048 code (only support 1024!) |
| 4577 | else if( pLoggedInPort->rx_data_size >= 1024) |
| 4578 | fl = 0x00020000; // 1024 code |
| 4579 | else if( pLoggedInPort->rx_data_size >= 512) |
| 4580 | fl = 0x00010000; // 512 code |
| 4581 | else |
| 4582 | fl = 0; // 128 bytes -- should never happen |
| 4583 | |
| 4584 | |
| 4585 | pIWE->Hdr_Len |= fl; // add xmit FC frame len for data phase |
| 4586 | pIWE->Hdr_Addr = fcChip->SEST->base + |
| 4587 | ((unsigned long)&fcChip->SEST->DataHDR[*fcExchangeIndex] - |
| 4588 | (unsigned long)fcChip->SEST); |
| 4589 | |
| 4590 | pIWE->RSP_Len = sizeof(TachFCHDR_RSP) ; // hdr+data (recv'd RSP frame) |
| 4591 | pIWE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID |
| 4592 | |
| 4593 | memset( &fcChip->SEST->RspHDR[ *fcExchangeIndex].pl, 0, |
| 4594 | sizeof( FCP_STATUS_RESPONSE) ); // clear out previous status |
| 4595 | |
| 4596 | pIWE->RSP_Addr = fcChip->SEST->base + |
| 4597 | ((unsigned long)&fcChip->SEST->RspHDR[*fcExchangeIndex] - |
| 4598 | (unsigned long)fcChip->SEST); |
| 4599 | |
| 4600 | // Do we need local or extended gather list? |
| 4601 | // depends on size - we can handle 3 len/addr pairs |
| 4602 | // locally. |
| 4603 | |
| 4604 | fcp_dl = build_SEST_sgList( |
| 4605 | cpqfcHBAdata->PciDev, |
| 4606 | &pIWE->GLen1, |
| 4607 | Cmnd, // S/G list |
| 4608 | &sgPairs, // return # of pairs in S/G list (from "Data" descriptor) |
| 4609 | &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later) |
| 4610 | |
| 4611 | if( !fcp_dl ) // error building S/G list? |
| 4612 | { |
| 4613 | ulStatus = MEMPOOL_FAIL; |
| 4614 | break; // give up |
| 4615 | } |
| 4616 | |
| 4617 | // Now that we know total data length in |
| 4618 | // the passed S/G buffer, set FCP CMND frame |
| 4619 | build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl ); |
| 4620 | |
| 4621 | |
| 4622 | |
| 4623 | if( sgPairs > 3 ) // need extended s/g list |
| 4624 | pIWE->Buff_Off = 0x78000000L; // extended data | (no offset) |
| 4625 | else // local data pointers (in SEST) |
| 4626 | pIWE->Buff_Off = 0xf8000000L; // local data | (no offset) |
| 4627 | |
| 4628 | // ULONG 5 |
| 4629 | pIWE->Link = 0x0000ffffL; // Buff_Index | Link |
| 4630 | |
| 4631 | pIWE->RX_ID = 0x0L; // DWord 6: RX_ID set by target XFER_RDY |
| 4632 | |
| 4633 | // DWord 7 |
| 4634 | pIWE->Data_Len = 0L; // TL enters rcv'd XFER_RDY BURST_LEN |
| 4635 | pIWE->Exp_RO = 0L; // DWord 8 |
| 4636 | // DWord 9 |
| 4637 | pIWE->Exp_Byte_Cnt = fcp_dl; // sum of gather buffers |
| 4638 | } |
| 4639 | break; |
| 4640 | |
| 4641 | |
| 4642 | |
| 4643 | |
| 4644 | |
| 4645 | case SCSI_IRE: // TachLite Initiator Read Entry |
| 4646 | |
| 4647 | if( Cmnd->timeout != 0) |
| 4648 | { |
| 4649 | // printk("Cmnd->timeout %d\n", Cmnd->timeout); |
| 4650 | // per Linux Scsi |
| 4651 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = Cmnd->timeout; |
| 4652 | } |
| 4653 | else // use our best guess, based on FC & device |
| 4654 | { |
| 4655 | |
| 4656 | if( Cmnd->SCp.Message == 1 ) // Tape device? (from INQUIRY) |
| 4657 | { |
| 4658 | // turn off our timeouts (for now...) |
| 4659 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 0xFFFFFFFF; |
| 4660 | } |
| 4661 | else |
| 4662 | { |
| 4663 | Exchanges->fcExchange[ *fcExchangeIndex].reTries = 1; |
| 4664 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 7; // per SCSI req. |
| 4665 | } |
| 4666 | } |
| 4667 | |
| 4668 | |
| 4669 | // first, build FCP_CMND |
| 4670 | |
| 4671 | |
| 4672 | *pIRB_flags = 0; // clear IRB flags |
| 4673 | IRB_flags.SFA = 1; // send SFS FCP-CMND (not SEST index) |
| 4674 | // NOTE: unlike FC LinkService login frames, |
| 4675 | // normal SCSI commands are sent "open loop" |
| 4676 | IRB_flags.DCM = 1; // Disable completion message for Cmnd frame |
| 4677 | SfsLen = *pIRB_flags; |
| 4678 | |
| 4679 | SfsLen <<= 24; // shift flags to MSB |
| 4680 | SfsLen += 64L; // add len to LSB (header & CMND payload) |
| 4681 | |
| 4682 | CMDfchs->d_id |= (0x06000000L); // R_CTL = 6 for command |
| 4683 | |
| 4684 | // TYPE[31-24] 8 for FCP SCSI |
| 4685 | // f_ctl[23:0] exchg originator, 1st seq, xfer S.I. |
| 4686 | // valid RO |
| 4687 | CMDfchs->f_ctl = 0x08210008L; |
| 4688 | CMDfchs->seq_cnt = 0x0L; |
| 4689 | // x_ID & data direction bit set later |
| 4690 | CMDfchs->ox_rx_id = 0xFFFF; // clear |
| 4691 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4692 | |
| 4693 | |
| 4694 | |
| 4695 | // Now setup the SEST entry |
| 4696 | pIRE = &fcChip->SEST->u[ *fcExchangeIndex ].IRE; |
| 4697 | |
| 4698 | // fill out the IRE: |
| 4699 | // VALid entry:Dir outbound:enable CM:enal INT: |
| 4700 | pIRE->Seq_Accum = 0xCE000000L; // VAL,DIR inbound,DCM| INI,DAT,RSP |
| 4701 | |
| 4702 | pIRE->reserved = 0L; |
| 4703 | pIRE->RSP_Len = sizeof(TachFCHDR_RSP) ; // hdr+data (recv'd RSP frame) |
| 4704 | pIRE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID |
| 4705 | |
| 4706 | pIRE->RSP_Addr = fcChip->SEST->base + |
| 4707 | ((unsigned long)&fcChip->SEST->RspHDR[*fcExchangeIndex] - |
| 4708 | (unsigned long)fcChip->SEST); |
| 4709 | |
| 4710 | // Do we need local or extended gather list? |
| 4711 | // depends on size - we can handle 3 len/addr pairs |
| 4712 | // locally. |
| 4713 | |
| 4714 | fcp_dl = build_SEST_sgList( |
| 4715 | cpqfcHBAdata->PciDev, |
| 4716 | &pIRE->SLen1, |
| 4717 | Cmnd, // SCSI command Data desc. with S/G list |
| 4718 | &sgPairs, // return # of pairs in S/G list (from "Data" descriptor) |
| 4719 | &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later) |
| 4720 | |
| 4721 | |
| 4722 | if( !fcp_dl ) // error building S/G list? |
| 4723 | { |
| 4724 | // It is permissible to have a ZERO LENGTH Read command. |
| 4725 | // If there is the case, simply set fcp_dl (and Exp_Byte_Cnt) |
| 4726 | // to 0 and continue. |
| 4727 | if( Cmnd->request_bufflen == 0 ) |
| 4728 | { |
| 4729 | fcp_dl = 0; // no FC DATA frames expected |
| 4730 | |
| 4731 | } |
| 4732 | else |
| 4733 | { |
| 4734 | ulStatus = MEMPOOL_FAIL; |
| 4735 | break; // give up |
| 4736 | } |
| 4737 | } |
| 4738 | |
| 4739 | // now that we know the S/G length, build CMND payload |
| 4740 | build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl ); |
| 4741 | |
| 4742 | |
| 4743 | if( sgPairs > 3 ) // need extended s/g list |
| 4744 | pIRE->Buff_Off = 0x00000000; // DWord 4: extended s/g list, no offset |
| 4745 | else |
| 4746 | pIRE->Buff_Off = 0x80000000; // local data, no offset |
| 4747 | |
| 4748 | pIRE->Buff_Index = 0x0L; // DWord 5: Buff_Index | Reserved |
| 4749 | |
| 4750 | pIRE->Exp_RO = 0x0L; // DWord 6: Expected Rel. Offset |
| 4751 | |
| 4752 | pIRE->Byte_Count = 0; // DWord 7: filled in by TL on err |
| 4753 | pIRE->reserved_ = 0; // DWord 8: reserved |
| 4754 | // NOTE: 0 length READ is OK. |
| 4755 | pIRE->Exp_Byte_Cnt = fcp_dl;// DWord 9: sum of scatter buffers |
| 4756 | |
| 4757 | break; |
| 4758 | |
| 4759 | |
| 4760 | |
| 4761 | |
| 4762 | // Fibre Channel SCSI 'responder' sequences... |
| 4763 | // (originator means 'target' in FCP-SCSI) |
| 4764 | case SCSI_TWE: // TachLite Target Write Entry |
| 4765 | |
| 4766 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 10; // per SCSI req. |
| 4767 | |
| 4768 | // first, build FCP_CMND |
| 4769 | |
| 4770 | *pIRB_flags = 0; // clear IRB flags |
| 4771 | IRB_flags.SFA = 1; // send SFS (XFER_RDY) |
| 4772 | SfsLen = *pIRB_flags; |
| 4773 | |
| 4774 | SfsLen <<= 24; // shift flags to MSB |
| 4775 | SfsLen += (32L + 12L);// add SFS len (header & XFER_RDY payload) |
| 4776 | |
| 4777 | CMDfchs->d_id |= (0x05000000L); // R_CTL = 5 for XFER_RDY |
| 4778 | |
| 4779 | // TYPE[31-24] 8 for FCP SCSI |
| 4780 | // f_ctl[23:0] exchg responder, 1st seq, xfer S.I. |
| 4781 | // valid RO |
| 4782 | CMDfchs->f_ctl = 0x08810008L; |
| 4783 | CMDfchs->seq_cnt = 0x01000000; // sequence ID: df_ctl: sequence count |
| 4784 | // use originator (other port's) OX_ID |
| 4785 | CMDfchs->ox_rx_id = InFCHS->ox_rx_id; // we want upper 16 bits |
| 4786 | CMDfchs->ro = 0x0L; // relative offset (n/a) |
| 4787 | |
| 4788 | // now, fill out FCP-RSP header |
| 4789 | // (use buffer inside SEST object) |
| 4790 | |
| 4791 | rspHDR = &fcChip->SEST->RspHDR[ *fcExchangeIndex ]; |
| 4792 | rspHDR->reserved = 0L; // must clear |
| 4793 | rspHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS |
| 4794 | rspHDR->d_id = (InFCHS->s_id | 0x07000000L); // R_CTL= FCP_RSP |
| 4795 | rspHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0 |
| 4796 | // TYPE[31-24] 8 for FCP SCSI |
| 4797 | // f_ctl[23:0] responder|last seq| xfer S.I. |
| 4798 | rspHDR->f_ctl = 0x08910000L; |
| 4799 | rspHDR->seq_cnt = 0x03000000; // sequence ID |
| 4800 | rspHDR->ox_rx_id = InFCHS->ox_rx_id; // gives us OX_ID |
| 4801 | rspHDR->ro = 0x0L; // relative offset (n/a) |
| 4802 | |
| 4803 | |
| 4804 | // Now setup the SEST entry |
| 4805 | |
| 4806 | pTWE = &fcChip->SEST->u[ *fcExchangeIndex ].TWE; |
| 4807 | |
| 4808 | // fill out the TWE: |
| 4809 | |
| 4810 | // VALid entry:Dir outbound:enable CM:enal INT: |
| 4811 | pTWE->Seq_Accum = 0xC4000000L; // upper word flags |
| 4812 | pTWE->reserved = 0L; |
| 4813 | pTWE->Remote_Node_ID = 0L; // no more auto RSP frame! (TL/TS change) |
| 4814 | pTWE->Remote_Node_ID |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID |
| 4815 | |
| 4816 | |
| 4817 | // Do we need local or extended gather list? |
| 4818 | // depends on size - we can handle 3 len/addr pairs |
| 4819 | // locally. |
| 4820 | |
| 4821 | fcp_dl = build_SEST_sgList( |
| 4822 | cpqfcHBAdata->PciDev, |
| 4823 | &pTWE->SLen1, |
| 4824 | Cmnd, // S/G list |
| 4825 | &sgPairs, // return # of pairs in S/G list (from "Data" descriptor) |
| 4826 | &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later) |
| 4827 | |
| 4828 | |
| 4829 | if( !fcp_dl ) // error building S/G list? |
| 4830 | { |
| 4831 | ulStatus = MEMPOOL_FAIL; |
| 4832 | break; // give up |
| 4833 | } |
| 4834 | |
| 4835 | // now that we know the S/G length, build CMND payload |
| 4836 | build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl ); |
| 4837 | |
| 4838 | |
| 4839 | if( sgPairs > 3 ) // need extended s/g list |
| 4840 | pTWE->Buff_Off = 0x00000000; // extended s/g list, no offset |
| 4841 | else |
| 4842 | pTWE->Buff_Off = 0x80000000; // local data, no offset |
| 4843 | |
| 4844 | pTWE->Buff_Index = 0; // Buff_Index | Link |
| 4845 | pTWE->Exp_RO = 0; |
| 4846 | pTWE->Byte_Count = 0; // filled in by TL on err |
| 4847 | pTWE->reserved_ = 0; |
| 4848 | pTWE->Exp_Byte_Cnt = fcp_dl;// sum of scatter buffers |
| 4849 | |
| 4850 | break; |
| 4851 | |
| 4852 | |
| 4853 | |
| 4854 | |
| 4855 | |
| 4856 | |
| 4857 | case SCSI_TRE: // TachLite Target Read Entry |
| 4858 | |
| 4859 | // It doesn't make much sense for us to "time-out" a READ, |
| 4860 | // but we'll use it for design consistency and internal error recovery. |
| 4861 | Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 10; // per SCSI req. |
| 4862 | |
| 4863 | // I/O request block settings... |
| 4864 | *pIRB_flags = 0; // clear IRB flags |
| 4865 | // check PRLI (process login) info |
| 4866 | // to see if Initiator Requires XFER_RDY |
| 4867 | // if not, don't send one! |
| 4868 | // { PRLI check...} |
| 4869 | IRB_flags.SFA = 0; // don't send XFER_RDY - start data |
| 4870 | SfsLen = *pIRB_flags; |
| 4871 | |
| 4872 | SfsLen <<= 24; // shift flags to MSB |
| 4873 | SfsLen += (32L + 12L);// add SFS len (header & XFER_RDY payload) |
| 4874 | |
| 4875 | |
| 4876 | |
| 4877 | // now, fill out FCP-DATA header |
| 4878 | // (use buffer inside SEST object) |
| 4879 | dataHDR = &fcChip->SEST->DataHDR[ *fcExchangeIndex ]; |
| 4880 | |
| 4881 | dataHDR->reserved = 0L; // must clear |
| 4882 | dataHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS,noLCr,no TS |
| 4883 | dataHDR->d_id = (InFCHS->s_id | 0x01000000L); // R_CTL= FCP_DATA |
| 4884 | dataHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0 |
| 4885 | |
| 4886 | |
| 4887 | // TYPE[31-24] 8 for FCP SCSI |
| 4888 | // f_ctl[23:0] exchg responder, not 1st seq, xfer S.I. |
| 4889 | // valid RO |
| 4890 | dataHDR->f_ctl = 0x08810008L; |
| 4891 | dataHDR->seq_cnt = 0x01000000; // sequence ID (no XRDY) |
| 4892 | dataHDR->ox_rx_id = InFCHS->ox_rx_id & 0xFFFF0000; // we want upper 16 bits |
| 4893 | dataHDR->ro = 0x0L; // relative offset (n/a) |
| 4894 | |
| 4895 | // now, fill out FCP-RSP header |
| 4896 | // (use buffer inside SEST object) |
| 4897 | rspHDR = &fcChip->SEST->RspHDR[ *fcExchangeIndex ]; |
| 4898 | |
| 4899 | rspHDR->reserved = 0L; // must clear |
| 4900 | rspHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS |
| 4901 | rspHDR->d_id = (InFCHS->s_id | 0x07000000L); // R_CTL= FCP_RSP |
| 4902 | rspHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0 |
| 4903 | // TYPE[31-24] 8 for FCP SCSI |
| 4904 | // f_ctl[23:0] responder|last seq| xfer S.I. |
| 4905 | rspHDR->f_ctl = 0x08910000L; |
| 4906 | rspHDR->seq_cnt = 0x02000000; // sequence ID: df_ctl: sequence count |
| 4907 | |
| 4908 | rspHDR->ro = 0x0L; // relative offset (n/a) |
| 4909 | |
| 4910 | |
| 4911 | // Now setup the SEST entry |
| 4912 | pTRE = &fcChip->SEST->u[ *fcExchangeIndex ].TRE; |
| 4913 | |
| 4914 | |
| 4915 | // VALid entry:Dir outbound:enable CM:enal INT: |
| 4916 | pTRE->Hdr_Len = 0x86010020L; // data frame Len always 32 bytes |
| 4917 | pTRE->Hdr_Addr = // bus address of dataHDR; |
| 4918 | fcChip->SEST->base + |
| 4919 | ((unsigned long)&fcChip->SEST->DataHDR[ *fcExchangeIndex ] - |
| 4920 | (unsigned long)fcChip->SEST); |
| 4921 | |
| 4922 | pTRE->RSP_Len = 64L; // hdr+data (TL assisted RSP frame) |
| 4923 | pTRE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID |
| 4924 | pTRE->RSP_Addr = // bus address of rspHDR |
| 4925 | fcChip->SEST->base + |
| 4926 | ((unsigned long)&fcChip->SEST->RspHDR[ *fcExchangeIndex ] - |
| 4927 | (unsigned long)fcChip->SEST); |
| 4928 | |
| 4929 | // Do we need local or extended gather list? |
| 4930 | // depends on size - we can handle 3 len/addr pairs |
| 4931 | // locally. |
| 4932 | |
| 4933 | fcp_dl = build_SEST_sgList( |
| 4934 | cpqfcHBAdata->PciDev, |
| 4935 | &pTRE->GLen1, |
| 4936 | Cmnd, // S/G list |
| 4937 | &sgPairs, // return # of pairs in S/G list (from "Data" descriptor) |
| 4938 | &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later) |
| 4939 | |
| 4940 | |
| 4941 | if( !fcp_dl ) // error building S/G list? |
| 4942 | { |
| 4943 | ulStatus = MEMPOOL_FAIL; |
| 4944 | break; // give up |
| 4945 | } |
| 4946 | |
| 4947 | // no payload or command to build -- READ doesn't need XRDY |
| 4948 | |
| 4949 | |
| 4950 | if( sgPairs > 3 ) // need extended s/g list |
| 4951 | pTRE->Buff_Off = 0x78000000L; // extended data | (no offset) |
| 4952 | else // local data pointers (in SEST) |
| 4953 | pTRE->Buff_Off = 0xf8000000L; // local data | (no offset) |
| 4954 | |
| 4955 | // ULONG 5 |
| 4956 | pTRE->Buff_Index = 0L; // Buff_Index | reserved |
| 4957 | pTRE->reserved = 0x0L; // DWord 6 |
| 4958 | |
| 4959 | // DWord 7: NOTE: zero length will |
| 4960 | // hang TachLite! |
| 4961 | pTRE->Data_Len = fcp_dl; // e.g. sum of scatter buffers |
| 4962 | |
| 4963 | pTRE->reserved_ = 0L; // DWord 8 |
| 4964 | pTRE->reserved__ = 0L; // DWord 9 |
| 4965 | |
| 4966 | break; |
| 4967 | |
| 4968 | |
| 4969 | |
| 4970 | |
| 4971 | |
| 4972 | |
| 4973 | |
| 4974 | case FCP_RESPONSE: |
| 4975 | // Target response frame: this sequence uses an OX/RX ID |
| 4976 | // pair from a completed SEST exchange. We built most |
| 4977 | // of the response frame when we created the TWE/TRE. |
| 4978 | |
| 4979 | *pIRB_flags = 0; // clear IRB flags |
| 4980 | IRB_flags.SFA = 1; // send SFS (RSP) |
| 4981 | SfsLen = *pIRB_flags; |
| 4982 | |
| 4983 | SfsLen <<= 24; // shift flags to MSB |
| 4984 | SfsLen += sizeof(TachFCHDR_RSP);// add SFS len (header & RSP payload) |
| 4985 | |
| 4986 | |
| 4987 | Exchanges->fcExchange[ *fcExchangeIndex].type = |
| 4988 | FCP_RESPONSE; // change Exchange type to "response" phase |
| 4989 | |
| 4990 | // take advantage of prior knowledge of OX/RX_ID pair from |
| 4991 | // previous XFER outbound frame (still in fchs of exchange) |
| 4992 | fcChip->SEST->RspHDR[ *fcExchangeIndex ].ox_rx_id = |
| 4993 | CMDfchs->ox_rx_id; |
| 4994 | |
| 4995 | // Check the status of the DATA phase of the exchange so we can report |
| 4996 | // status to the initiator |
| 4997 | buildFCPstatus( fcChip, *fcExchangeIndex); // set RSP payload fields |
| 4998 | |
| 4999 | memcpy( |
| 5000 | CMDfchs, // re-use same XFER fchs for Response frame |
| 5001 | &fcChip->SEST->RspHDR[ *fcExchangeIndex ], |
| 5002 | sizeof( TachFCHDR_RSP )); |
| 5003 | |
| 5004 | |
| 5005 | break; |
| 5006 | |
| 5007 | default: |
| 5008 | printk("cpqfcTS: don't know how to build FC type: %Xh(%d)\n", type,type); |
| 5009 | break; |
| 5010 | |
| 5011 | } |
| 5012 | |
| 5013 | |
| 5014 | |
| 5015 | if( !ulStatus) // no errors above? |
| 5016 | { |
| 5017 | // FCHS is built; now build IRB |
| 5018 | |
| 5019 | // link the just built FCHS (the "command") to the IRB entry |
| 5020 | // for this Exchange. |
| 5021 | pIRB = &Exchanges->fcExchange[ *fcExchangeIndex].IRB; |
| 5022 | |
| 5023 | // len & flags according to command type above |
| 5024 | pIRB->Req_A_SFS_Len = SfsLen; // includes IRB flags & len |
| 5025 | pIRB->Req_A_SFS_Addr = // TL needs physical addr of frame to send |
| 5026 | fcChip->exch_dma_handle + (unsigned long)CMDfchs - |
| 5027 | (unsigned long)Exchanges; |
| 5028 | |
| 5029 | pIRB->Req_A_SFS_D_ID = CMDfchs->d_id << 8; // Dest_ID must be consistent! |
| 5030 | |
| 5031 | // Exchange is complete except for "fix-up" fields to be set |
| 5032 | // at Tachyon Queuing time: |
| 5033 | // IRB->Req_A_Trans_ID (OX_ID/ RX_ID): |
| 5034 | // for SEST entry, lower bits correspond to actual FC Exchange ID |
| 5035 | // fchs->OX_ID or RX_ID |
| 5036 | } |
| 5037 | else |
| 5038 | { |
| 5039 | #ifdef DBG |
| 5040 | printk( "FC Error: SEST build Pool Allocation failed\n"); |
| 5041 | #endif |
| 5042 | // return resources... |
| 5043 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, *fcExchangeIndex); // SEST build failed |
| 5044 | } |
| 5045 | } |
| 5046 | else // no Exchanges available |
| 5047 | { |
| 5048 | ulStatus = SEST_FULL; |
| 5049 | printk( "FC Error: no fcExchanges available\n"); |
| 5050 | } |
| 5051 | return ulStatus; |
| 5052 | } |
| 5053 | |
| 5054 | |
| 5055 | |
| 5056 | |
| 5057 | |
| 5058 | |
| 5059 | // set RSP payload fields |
| 5060 | static void buildFCPstatus( PTACHYON fcChip, ULONG ExchangeID) |
| 5061 | { |
| 5062 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 5063 | FC_EXCHANGE *pExchange = &Exchanges->fcExchange[ExchangeID]; // shorthand |
| 5064 | PFCP_STATUS_RESPONSE pFcpStatus; |
| 5065 | |
| 5066 | memset( &fcChip->SEST->RspHDR[ ExchangeID ].pl, 0, |
| 5067 | sizeof( FCP_STATUS_RESPONSE) ); |
| 5068 | if( pExchange->status ) // something wrong? |
| 5069 | { |
| 5070 | pFcpStatus = (PFCP_STATUS_RESPONSE) // cast RSP buffer for this xchng |
| 5071 | &fcChip->SEST->RspHDR[ ExchangeID ].pl; |
| 5072 | if( pExchange->status & COUNT_ERROR ) |
| 5073 | { |
| 5074 | |
| 5075 | // set FCP response len valid (so we can report count error) |
| 5076 | pFcpStatus->fcp_status |= FCP_RSP_LEN_VALID; |
| 5077 | pFcpStatus->fcp_rsp_len = 0x04000000; // 4 byte len (BIG Endian) |
| 5078 | |
| 5079 | pFcpStatus->fcp_rsp_info = FCP_DATA_LEN_NOT_BURST_LEN; // RSP_CODE |
| 5080 | } |
| 5081 | } |
| 5082 | } |
| 5083 | |
| 5084 | |
| 5085 | static dma_addr_t |
| 5086 | cpqfc_pci_map_sg_page( |
| 5087 | struct pci_dev *pcidev, |
| 5088 | ULONG *hw_paddr, // where to put phys addr for HW use |
| 5089 | void *sgp_vaddr, // the virtual address of the sg page |
| 5090 | dma_addr_t *umap_paddr, // where to put phys addr for unmap |
| 5091 | unsigned int *maplen, // where to store sg entry length |
| 5092 | int PairCount) // number of sg pairs used in the page. |
| 5093 | { |
| 5094 | unsigned long aligned_addr = (unsigned long) sgp_vaddr; |
| 5095 | |
| 5096 | *maplen = PairCount * 8; |
| 5097 | aligned_addr += TL_EXT_SG_PAGE_BYTELEN; |
| 5098 | aligned_addr &= ~(TL_EXT_SG_PAGE_BYTELEN -1); |
| 5099 | |
| 5100 | *umap_paddr = pci_map_single(pcidev, (void *) aligned_addr, |
| 5101 | *maplen, PCI_DMA_TODEVICE); |
| 5102 | *hw_paddr = (ULONG) *umap_paddr; |
| 5103 | |
| 5104 | # if BITS_PER_LONG > 32 |
| 5105 | if( *umap_paddr >>32 ) { |
| 5106 | printk("cqpfcTS:Tach SG DMA addr %p>32 bits\n", |
| 5107 | (void*)umap_paddr); |
| 5108 | return 0; |
| 5109 | } |
| 5110 | # endif |
| 5111 | return *umap_paddr; |
| 5112 | } |
| 5113 | |
| 5114 | static void |
| 5115 | cpqfc_undo_SEST_mappings(struct pci_dev *pcidev, |
| 5116 | unsigned long contigaddr, int len, int dir, |
| 5117 | struct scatterlist *sgl, int use_sg, |
| 5118 | PSGPAGES *sgPages_head, |
| 5119 | int allocated_pages) |
| 5120 | { |
| 5121 | PSGPAGES i, next; |
| 5122 | |
| 5123 | if (contigaddr != (unsigned long) NULL) |
| 5124 | pci_unmap_single(pcidev, contigaddr, len, dir); |
| 5125 | |
| 5126 | if (sgl != NULL) |
| 5127 | pci_unmap_sg(pcidev, sgl, use_sg, dir); |
| 5128 | |
| 5129 | for (i=*sgPages_head; i != NULL ;i = next) |
| 5130 | { |
| 5131 | pci_unmap_single(pcidev, i->busaddr, i->maplen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5132 | PCI_DMA_TODEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5133 | i->busaddr = (dma_addr_t) NULL; |
| 5134 | i->maplen = 0L; |
| 5135 | next = i->next; |
| 5136 | kfree(i); |
| 5137 | } |
| 5138 | *sgPages_head = NULL; |
| 5139 | } |
| 5140 | |
| 5141 | // This routine builds scatter/gather lists into SEST entries |
| 5142 | // INPUTS: |
| 5143 | // SESTalPair - SEST address @DWordA "Local Buffer Length" |
| 5144 | // sgList - Scatter/Gather linked list of Len/Address data buffers |
| 5145 | // OUTPUT: |
| 5146 | // sgPairs - number of valid address/length pairs |
| 5147 | // Remarks: |
| 5148 | // The SEST data buffer pointers only depend on number of |
| 5149 | // length/ address pairs, NOT on the type (IWE, TRE,...) |
| 5150 | // Up to 3 pairs can be referenced in the SEST - more than 3 |
| 5151 | // require this Extended S/G list page. The page holds 4, 8, 16... |
| 5152 | // len/addr pairs, per Scatter/Gather List Page Length Reg. |
| 5153 | // TachLite allows pages to be linked to any depth. |
| 5154 | |
| 5155 | //#define DBG_SEST_SGLIST 1 // for printing out S/G pairs with Ext. pages |
| 5156 | |
| 5157 | static int ap_hi_water = TL_DANGER_SGPAGES; |
| 5158 | |
| 5159 | static ULONG build_SEST_sgList( |
| 5160 | struct pci_dev *pcidev, |
| 5161 | ULONG *SESTalPairStart, // the 3 len/address buffers in SEST |
| 5162 | Scsi_Cmnd *Cmnd, |
| 5163 | ULONG *sgPairs, |
| 5164 | PSGPAGES *sgPages_head) // link list of TL Ext. S/G pages from O/S Pool |
| 5165 | |
| 5166 | { |
| 5167 | ULONG i, AllocatedPages=0; // Tach Ext. S/G page allocations |
| 5168 | ULONG* alPair = SESTalPairStart; |
| 5169 | ULONG* ext_sg_page_phys_addr_place = NULL; |
| 5170 | int PairCount; |
| 5171 | unsigned long ulBuff, contigaddr; |
| 5172 | ULONG total_data_len=0; // (in bytes) |
| 5173 | ULONG bytes_to_go = Cmnd->request_bufflen; // total xfer (S/G sum) |
| 5174 | ULONG thisMappingLen; |
| 5175 | struct scatterlist *sgl = NULL; // S/G list (Linux format) |
| 5176 | int sg_count, totalsgs; |
| 5177 | dma_addr_t busaddr; |
| 5178 | unsigned long thislen, offset; |
| 5179 | PSGPAGES *sgpage = sgPages_head; |
| 5180 | PSGPAGES prev_page = NULL; |
| 5181 | |
| 5182 | # define WE_HAVE_SG_LIST (sgl != (unsigned long) NULL) |
| 5183 | contigaddr = (unsigned long) NULL; |
| 5184 | |
| 5185 | if( !Cmnd->use_sg ) // no S/G list? |
| 5186 | { |
| 5187 | if (bytes_to_go <= TL_MAX_SG_ELEM_LEN) |
| 5188 | { |
| 5189 | *sgPairs = 1; // use "local" S/G pair in SEST entry |
| 5190 | // (for now, ignore address bits above #31) |
| 5191 | |
| 5192 | *alPair++ = bytes_to_go; // bits 18-0, length |
| 5193 | |
| 5194 | if (bytes_to_go != 0) { |
| 5195 | contigaddr = ulBuff = pci_map_single(pcidev, |
| 5196 | Cmnd->request_buffer, |
| 5197 | Cmnd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5198 | Cmnd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5199 | // printk("ms %p ", ulBuff); |
| 5200 | } |
| 5201 | else { |
| 5202 | // No data transfer, (e.g.: Test Unit Ready) |
| 5203 | // printk("btg=0 "); |
| 5204 | *sgPairs = 0; |
| 5205 | memset(alPair, 0, sizeof(*alPair)); |
| 5206 | return 0; |
| 5207 | } |
| 5208 | |
| 5209 | # if BITS_PER_LONG > 32 |
| 5210 | if( ulBuff >>32 ) { |
| 5211 | printk("FATAL! Tachyon DMA address %p " |
| 5212 | "exceeds 32 bits\n", (void*)ulBuff ); |
| 5213 | return 0; |
| 5214 | } |
| 5215 | # endif |
| 5216 | *alPair = (ULONG)ulBuff; |
| 5217 | return bytes_to_go; |
| 5218 | } |
| 5219 | else // We have a single large (too big) contiguous buffer. |
| 5220 | { // We will have to break it up. We'll use the scatter |
| 5221 | // gather code way below, but use contigaddr instead |
| 5222 | // of sg_dma_addr(). (this is a very rare case). |
| 5223 | |
| 5224 | unsigned long btg; |
| 5225 | contigaddr = pci_map_single(pcidev, Cmnd->request_buffer, |
| 5226 | Cmnd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5227 | Cmnd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5228 | |
| 5229 | // printk("contigaddr = %p, len = %d\n", |
| 5230 | // (void *) contigaddr, bytes_to_go); |
| 5231 | totalsgs = 0; |
| 5232 | for (btg = bytes_to_go; btg > 0; ) { |
| 5233 | btg -= ( btg > TL_MAX_SG_ELEM_LEN ? |
| 5234 | TL_MAX_SG_ELEM_LEN : btg ); |
| 5235 | totalsgs++; |
| 5236 | } |
| 5237 | sgl = NULL; |
| 5238 | *sgPairs = totalsgs; |
| 5239 | } |
| 5240 | } |
| 5241 | else // we do have a scatter gather list |
| 5242 | { |
| 5243 | // [TBD - update for Linux to support > 32 bits addressing] |
| 5244 | // since the format for local & extended S/G lists is different, |
| 5245 | // check if S/G pairs exceeds 3. |
| 5246 | // *sgPairs = Cmnd->use_sg; Nope, that's wrong. |
| 5247 | |
| 5248 | sgl = (struct scatterlist*)Cmnd->request_buffer; |
| 5249 | sg_count = pci_map_sg(pcidev, sgl, Cmnd->use_sg, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5250 | Cmnd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5251 | if( sg_count <= 3 ) { |
| 5252 | |
| 5253 | // we need to be careful here that no individual mapping |
| 5254 | // is too large, and if any is, that breaking it up |
| 5255 | // doesn't push us over 3 sgs, or, if it does, that we |
| 5256 | // handle that case. Tachyon can take 0x7FFFF bits for length, |
| 5257 | // but sg structure uses "unsigned int", on the face of it, |
| 5258 | // up to 0xFFFFFFFF or even more. |
| 5259 | |
| 5260 | int i; |
| 5261 | unsigned long thislen; |
| 5262 | |
| 5263 | totalsgs = 0; |
| 5264 | for (i=0;i<sg_count;i++) { |
| 5265 | thislen = sg_dma_len(&sgl[i]); |
| 5266 | while (thislen >= TL_MAX_SG_ELEM_LEN) { |
| 5267 | totalsgs++; |
| 5268 | thislen -= TL_MAX_SG_ELEM_LEN; |
| 5269 | } |
| 5270 | if (thislen > 0) totalsgs++; |
| 5271 | } |
| 5272 | *sgPairs = totalsgs; |
| 5273 | } else totalsgs = 999; // as a first estimate, definitely >3, |
| 5274 | |
| 5275 | // if (totalsgs != sg_count) |
| 5276 | // printk("totalsgs = %d, sgcount=%d\n",totalsgs,sg_count); |
| 5277 | } |
| 5278 | |
| 5279 | if( totalsgs <= 3 ) // can (must) use "local" SEST list |
| 5280 | { |
| 5281 | while( bytes_to_go) |
| 5282 | { |
| 5283 | offset = 0L; |
| 5284 | |
| 5285 | if ( WE_HAVE_SG_LIST ) |
| 5286 | thisMappingLen = sg_dma_len(sgl); |
| 5287 | else // or contiguous buffer? |
| 5288 | thisMappingLen = bytes_to_go; |
| 5289 | |
| 5290 | while (thisMappingLen > 0) |
| 5291 | { |
| 5292 | thislen = thisMappingLen > TL_MAX_SG_ELEM_LEN ? |
| 5293 | TL_MAX_SG_ELEM_LEN : thisMappingLen; |
| 5294 | bytes_to_go = bytes_to_go - thislen; |
| 5295 | |
| 5296 | // we have L/A pair; L = thislen, A = physicalAddress |
| 5297 | // load into SEST... |
| 5298 | |
| 5299 | total_data_len += thislen; |
| 5300 | *alPair = thislen; // bits 18-0, length |
| 5301 | |
| 5302 | alPair++; |
| 5303 | |
| 5304 | if ( WE_HAVE_SG_LIST ) |
| 5305 | ulBuff = sg_dma_address(sgl) + offset; |
| 5306 | else |
| 5307 | ulBuff = contigaddr + offset; |
| 5308 | |
| 5309 | offset += thislen; |
| 5310 | |
| 5311 | # if BITS_PER_LONG > 32 |
| 5312 | if( ulBuff >>32 ) { |
| 5313 | printk("cqpfcTS: 2Tach DMA address %p > 32 bits\n", |
| 5314 | (void*)ulBuff ); |
| 5315 | printk("%s = %p, offset = %ld\n", |
| 5316 | WE_HAVE_SG_LIST ? "ulBuff" : "contigaddr", |
| 5317 | WE_HAVE_SG_LIST ? (void *) ulBuff : (void *) contigaddr, |
| 5318 | offset); |
| 5319 | return 0; |
| 5320 | } |
| 5321 | # endif |
| 5322 | *alPair++ = (ULONG)ulBuff; // lower 32 bits (31-0) |
| 5323 | thisMappingLen -= thislen; |
| 5324 | } |
| 5325 | |
| 5326 | if ( WE_HAVE_SG_LIST ) ++sgl; // next S/G pair |
| 5327 | else if (bytes_to_go != 0) printk("BTG not zero!\n"); |
| 5328 | |
| 5329 | # ifdef DBG_SEST_SGLIST |
| 5330 | printk("L=%d ", thisMappingLen); |
| 5331 | printk("btg=%d ", bytes_to_go); |
| 5332 | # endif |
| 5333 | |
| 5334 | } |
| 5335 | // printk("i:%d\n", *sgPairs); |
| 5336 | } |
| 5337 | else // more than 3 pairs requires Extended S/G page (Pool Allocation) |
| 5338 | { |
| 5339 | // clear out SEST DWORDs (local S/G addr) C-F (A-B set in following logic) |
| 5340 | for( i=2; i<6; i++) |
| 5341 | alPair[i] = 0; |
| 5342 | |
| 5343 | PairCount = TL_EXT_SG_PAGE_COUNT; // forces initial page allocation |
| 5344 | totalsgs = 0; |
| 5345 | while( bytes_to_go ) |
| 5346 | { |
| 5347 | // Per SEST format, we can support 524287 byte lengths per |
| 5348 | // S/G pair. Typical user buffers are 4k, and very rarely |
| 5349 | // exceed 12k due to fragmentation of physical memory pages. |
| 5350 | // However, on certain O/S system (not "user") buffers (on platforms |
| 5351 | // with huge memories), it's possible to exceed this |
| 5352 | // length in a single S/G address/len mapping, so we have to handle |
| 5353 | // that. |
| 5354 | |
| 5355 | offset = 0L; |
| 5356 | if ( WE_HAVE_SG_LIST ) |
| 5357 | thisMappingLen = sg_dma_len(sgl); |
| 5358 | else |
| 5359 | thisMappingLen = bytes_to_go; |
| 5360 | |
| 5361 | while (thisMappingLen > 0) |
| 5362 | { |
| 5363 | thislen = thisMappingLen > TL_MAX_SG_ELEM_LEN ? |
| 5364 | TL_MAX_SG_ELEM_LEN : thisMappingLen; |
| 5365 | // printk("%d/%d/%d\n", thislen, thisMappingLen, bytes_to_go); |
| 5366 | |
| 5367 | // should we load into "this" extended S/G page, or allocate |
| 5368 | // new page? |
| 5369 | |
| 5370 | if( PairCount >= TL_EXT_SG_PAGE_COUNT ) |
| 5371 | { |
| 5372 | // Now, we have to map the previous page, (triggering buffer bounce) |
| 5373 | // The first time thru the loop, there won't be a previous page. |
| 5374 | if (prev_page != NULL) // is there a prev page? |
| 5375 | { |
| 5376 | // this code is normally kind of hard to trigger, |
| 5377 | // you have to use up more than 256 scatter gather |
| 5378 | // elements to get here. Cranking down TL_MAX_SG_ELEM_LEN |
| 5379 | // to an absurdly low value (128 bytes or so) to artificially |
| 5380 | // break i/o's into a zillion pieces is how I tested it. |
| 5381 | busaddr = cpqfc_pci_map_sg_page(pcidev, |
| 5382 | ext_sg_page_phys_addr_place, |
| 5383 | prev_page->page, |
| 5384 | &prev_page->busaddr, |
| 5385 | &prev_page->maplen, |
| 5386 | PairCount); |
| 5387 | } |
| 5388 | // Allocate the TL Extended S/G list page. We have |
| 5389 | // to allocate twice what we want to ensure required TL alignment |
| 5390 | // (Tachlite TL/TS User Man. Rev 6.0, p 168) |
| 5391 | // We store the original allocated PVOID so we can free later |
| 5392 | *sgpage = kmalloc( sizeof(SGPAGES), GFP_ATOMIC); |
| 5393 | if ( ! *sgpage ) |
| 5394 | { |
| 5395 | printk("cpqfc: Allocation failed @ %d S/G page allocations\n", |
| 5396 | AllocatedPages); |
| 5397 | total_data_len = 0; // failure!! Ext. S/G is All-or-none affair |
| 5398 | |
| 5399 | // unmap the previous mappings, if any. |
| 5400 | |
| 5401 | cpqfc_undo_SEST_mappings(pcidev, contigaddr, |
| 5402 | Cmnd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5403 | Cmnd->sc_data_direction, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5404 | sgl, Cmnd->use_sg, sgPages_head, AllocatedPages+1); |
| 5405 | |
| 5406 | // FIXME: testing shows that if we get here, |
| 5407 | // it's bad news. (this has been this way for a long |
| 5408 | // time though, AFAIK. Not that that excuses it.) |
| 5409 | |
| 5410 | return 0; // give up (and probably hang the system) |
| 5411 | } |
| 5412 | // clear out memory we just allocated |
| 5413 | memset( (*sgpage)->page,0,TL_EXT_SG_PAGE_BYTELEN*2); |
| 5414 | (*sgpage)->next = NULL; |
| 5415 | (*sgpage)->busaddr = (dma_addr_t) NULL; |
| 5416 | (*sgpage)->maplen = 0L; |
| 5417 | |
| 5418 | // align the memory - TL requires sizeof() Ext. S/G page alignment. |
| 5419 | // We doubled the actual required size so we could mask off LSBs |
| 5420 | // to get desired offset |
| 5421 | |
| 5422 | ulBuff = (unsigned long) (*sgpage)->page; |
| 5423 | ulBuff += TL_EXT_SG_PAGE_BYTELEN; |
| 5424 | ulBuff &= ~(TL_EXT_SG_PAGE_BYTELEN -1); |
| 5425 | |
| 5426 | // set pointer, in SEST if first Ext. S/G page, or in last pair |
| 5427 | // of linked Ext. S/G pages... (Only 32-bit PVOIDs, so just |
| 5428 | // load lower 32 bits) |
| 5429 | // NOTE: the Len field must be '0' if this is the first Ext. S/G |
| 5430 | // pointer in SEST, and not 0 otherwise (we know thislen != 0). |
| 5431 | |
| 5432 | *alPair = (alPair != SESTalPairStart) ? thislen : 0; |
| 5433 | |
| 5434 | # ifdef DBG_SEST_SGLIST |
| 5435 | printk("PairCount %d @%p even %Xh, ", |
| 5436 | PairCount, alPair, *alPair); |
| 5437 | # endif |
| 5438 | |
| 5439 | // Save the place where we need to store the physical |
| 5440 | // address of this scatter gather page which we get when we map it |
| 5441 | // (and mapping we can do only after we fill it in.) |
| 5442 | alPair++; // next DWORD, will contain phys addr of the ext page |
| 5443 | ext_sg_page_phys_addr_place = alPair; |
| 5444 | |
| 5445 | // Now, set alPair = the virtual addr of the (Extended) S/G page |
| 5446 | // which will accept the Len/ PhysicalAddress pairs |
| 5447 | alPair = (ULONG *) ulBuff; |
| 5448 | |
| 5449 | AllocatedPages++; |
| 5450 | if (AllocatedPages >= ap_hi_water) |
| 5451 | { |
| 5452 | // This message should rarely, if ever, come out. |
| 5453 | // Previously (cpqfc version <= 2.0.5) the driver would |
| 5454 | // just puke if more than 4 SG pages were used, and nobody |
| 5455 | // ever complained about that. This only comes out if |
| 5456 | // more than 8 pages are used. |
| 5457 | |
| 5458 | printk(KERN_WARNING |
| 5459 | "cpqfc: Possible danger. %d scatter gather pages used.\n" |
| 5460 | "cpqfc: detected seemingly extreme memory " |
| 5461 | "fragmentation or huge data transfers.\n", |
| 5462 | AllocatedPages); |
| 5463 | ap_hi_water = AllocatedPages+1; |
| 5464 | } |
| 5465 | |
| 5466 | PairCount = 1; // starting new Ext. S/G page |
| 5467 | prev_page = (*sgpage); // remember this page, for next time thru |
| 5468 | sgpage = &((*sgpage)->next); |
| 5469 | } // end of new TL Ext. S/G page allocation |
| 5470 | |
| 5471 | *alPair = thislen; // bits 18-0, length (range check above) |
| 5472 | |
| 5473 | # ifdef DBG_SEST_SGLIST |
| 5474 | printk("PairCount %d @%p, even %Xh, ", PairCount, alPair, *alPair); |
| 5475 | # endif |
| 5476 | |
| 5477 | alPair++; // next DWORD, physical address |
| 5478 | |
| 5479 | if ( WE_HAVE_SG_LIST ) |
| 5480 | ulBuff = sg_dma_address(sgl) + offset; |
| 5481 | else |
| 5482 | ulBuff = contigaddr + offset; |
| 5483 | offset += thislen; |
| 5484 | |
| 5485 | # if BITS_PER_LONG > 32 |
| 5486 | if( ulBuff >>32 ) |
| 5487 | { |
| 5488 | printk("cqpfcTS: 1Tach DMA address %p > 32 bits\n", (void*)ulBuff ); |
| 5489 | printk("%s = %p, offset = %ld\n", |
| 5490 | WE_HAVE_SG_LIST ? "ulBuff" : "contigaddr", |
| 5491 | WE_HAVE_SG_LIST ? (void *) ulBuff : (void *) contigaddr, |
| 5492 | offset); |
| 5493 | return 0; |
| 5494 | } |
| 5495 | # endif |
| 5496 | |
| 5497 | *alPair = (ULONG) ulBuff; // lower 32 bits (31-0) |
| 5498 | |
| 5499 | # ifdef DBG_SEST_SGLIST |
| 5500 | printk("odd %Xh\n", *alPair); |
| 5501 | # endif |
| 5502 | alPair++; // next DWORD, next address/length pair |
| 5503 | |
| 5504 | PairCount++; // next Length/Address pair |
| 5505 | |
| 5506 | // if (PairCount > pc_hi_water) |
| 5507 | // { |
| 5508 | // printk("pc hi = %d ", PairCount); |
| 5509 | // pc_hi_water = PairCount; |
| 5510 | // } |
| 5511 | bytes_to_go -= thislen; |
| 5512 | total_data_len += thislen; |
| 5513 | thisMappingLen -= thislen; |
| 5514 | totalsgs++; |
| 5515 | } // while (thisMappingLen > 0) |
| 5516 | if ( WE_HAVE_SG_LIST ) sgl++; // next S/G pair |
| 5517 | } // while (bytes_to_go) |
| 5518 | |
| 5519 | // printk("Totalsgs=%d\n", totalsgs); |
| 5520 | *sgPairs = totalsgs; |
| 5521 | |
| 5522 | // PCI map (and bounce) the last (and usually only) extended SG page |
| 5523 | busaddr = cpqfc_pci_map_sg_page(pcidev, |
| 5524 | ext_sg_page_phys_addr_place, |
| 5525 | prev_page->page, |
| 5526 | &prev_page->busaddr, |
| 5527 | &prev_page->maplen, |
| 5528 | PairCount); |
| 5529 | } |
| 5530 | return total_data_len; |
| 5531 | } |
| 5532 | |
| 5533 | |
| 5534 | |
| 5535 | // The Tachlite SEST table is referenced to OX_ID (or RX_ID). To optimize |
| 5536 | // performance and debuggability, we index the Exchange structure to FC X_ID |
| 5537 | // This enables us to build exchanges for later en-queing to Tachyon, |
| 5538 | // provided we have an open X_ID slot. At Tachyon queing time, we only |
| 5539 | // need an ERQ slot; then "fix-up" references in the |
| 5540 | // IRB, FCHS, etc. as needed. |
| 5541 | // RETURNS: |
| 5542 | // 0 if successful |
| 5543 | // non-zero on error |
| 5544 | //sstartex |
| 5545 | ULONG cpqfcTSStartExchange( |
| 5546 | CPQFCHBA *cpqfcHBAdata, |
| 5547 | LONG ExchangeID ) |
| 5548 | { |
| 5549 | PTACHYON fcChip = &cpqfcHBAdata->fcChip; |
| 5550 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 5551 | FC_EXCHANGE *pExchange = &Exchanges->fcExchange[ ExchangeID ]; // shorthand |
| 5552 | USHORT producer, consumer; |
| 5553 | ULONG ulStatus=0; |
| 5554 | short int ErqIndex; |
| 5555 | BOOLEAN CompleteExchange = FALSE; // e.g. ACC replies are complete |
| 5556 | BOOLEAN SestType=FALSE; |
| 5557 | ULONG InboundData=0; |
| 5558 | |
| 5559 | // We will manipulate Tachlite chip registers here to successfully |
| 5560 | // start exchanges. |
| 5561 | |
| 5562 | // Check that link is not down -- we can't start an exchange on a |
| 5563 | // down link! |
| 5564 | |
| 5565 | if( fcChip->Registers.FMstatus.value & 0x80) // LPSM offline? |
| 5566 | { |
| 5567 | printk("fcStartExchange: PSM offline (%Xh), x_ID %Xh, type %Xh, port_id %Xh\n", |
| 5568 | fcChip->Registers.FMstatus.value & 0xFF, |
| 5569 | ExchangeID, |
| 5570 | pExchange->type, |
| 5571 | pExchange->fchs.d_id); |
| 5572 | |
| 5573 | if( ExchangeID >= TACH_SEST_LEN ) // Link Service Outbound frame? |
| 5574 | { |
| 5575 | // Our most popular LinkService commands are port discovery types |
| 5576 | // (PLOGI/ PDISC...), which are implicitly nullified by Link Down |
| 5577 | // events, so it makes no sense to Que them. However, ABTS should |
| 5578 | // be queued, since exchange sequences are likely destroyed by |
| 5579 | // Link Down events, and we want to notify other ports of broken |
| 5580 | // sequences by aborting the corresponding exchanges. |
| 5581 | if( pExchange->type != BLS_ABTS ) |
| 5582 | { |
| 5583 | ulStatus = LNKDWN_OSLS; |
| 5584 | goto Done; |
| 5585 | // don't Que most LinkServ exchanges on LINK DOWN |
| 5586 | } |
| 5587 | } |
| 5588 | |
| 5589 | printk("fcStartExchange: Que x_ID %Xh, type %Xh\n", |
| 5590 | ExchangeID, pExchange->type); |
| 5591 | pExchange->status |= EXCHANGE_QUEUED; |
| 5592 | ulStatus = EXCHANGE_QUEUED; |
| 5593 | goto Done; |
| 5594 | } |
| 5595 | |
| 5596 | // Make sure ERQ has available space. |
| 5597 | |
| 5598 | producer = (USHORT)fcChip->ERQ->producerIndex; // copies for logical arith. |
| 5599 | consumer = (USHORT)fcChip->ERQ->consumerIndex; |
| 5600 | producer++; // We are testing for full que by incrementing |
| 5601 | |
| 5602 | if( producer >= ERQ_LEN ) // rollover condition? |
| 5603 | producer = 0; |
| 5604 | if( consumer != producer ) // ERQ not full? |
| 5605 | { |
| 5606 | // ****************** Need Atomic access to chip registers!!******** |
| 5607 | |
| 5608 | // remember ERQ PI for copying IRB |
| 5609 | ErqIndex = (USHORT)fcChip->ERQ->producerIndex; |
| 5610 | fcChip->ERQ->producerIndex = producer; // this is written to Tachyon |
| 5611 | // we have an ERQ slot! If SCSI command, need SEST slot |
| 5612 | // otherwise we are done. |
| 5613 | |
| 5614 | // Note that Tachyon requires that bit 15 of the OX_ID or RX_ID be |
| 5615 | // set according to direction of data to/from Tachyon for SEST assists. |
| 5616 | // For consistency, enforce this rule for Link Service (non-SEST) |
| 5617 | // exchanges as well. |
| 5618 | |
| 5619 | // fix-up the X_ID field in IRB |
| 5620 | pExchange->IRB.Req_A_Trans_ID = ExchangeID & 0x7FFF; // 15-bit field |
| 5621 | |
| 5622 | // fix-up the X_ID field in fchs -- depends on Originator or Responder, |
| 5623 | // outgoing or incoming data? |
| 5624 | switch( pExchange->type ) |
| 5625 | { |
| 5626 | // ORIGINATOR types... we're setting our OX_ID and |
| 5627 | // defaulting the responder's RX_ID to 0xFFFF |
| 5628 | |
| 5629 | case SCSI_IRE: |
| 5630 | // Requirement: set MSB of x_ID for Incoming TL data |
| 5631 | // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50) |
| 5632 | InboundData = 0x8000; |
| 5633 | |
| 5634 | case SCSI_IWE: |
| 5635 | SestType = TRUE; |
| 5636 | pExchange->fchs.ox_rx_id = (ExchangeID | InboundData); |
| 5637 | pExchange->fchs.ox_rx_id <<= 16; // MSW shift |
| 5638 | pExchange->fchs.ox_rx_id |= 0xffff; // add default RX_ID |
| 5639 | |
| 5640 | // now fix-up the Data HDR OX_ID (TL automatically does rx_id) |
| 5641 | // (not necessary for IRE -- data buffer unused) |
| 5642 | if( pExchange->type == SCSI_IWE) |
| 5643 | { |
| 5644 | fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id = |
| 5645 | pExchange->fchs.ox_rx_id; |
| 5646 | |
| 5647 | } |
| 5648 | |
| 5649 | break; |
| 5650 | |
| 5651 | |
| 5652 | case FCS_NSR: // ext. link service Name Service Request |
| 5653 | case ELS_SCR: // ext. link service State Change Registration |
| 5654 | case ELS_FDISC:// ext. link service login |
| 5655 | case ELS_FLOGI:// ext. link service login |
| 5656 | case ELS_LOGO: // FC-PH extended link service logout |
| 5657 | case BLS_NOP: // Basic link service No OPeration |
| 5658 | case ELS_PLOGI:// ext. link service login (PLOGI) |
| 5659 | case ELS_PDISC:// ext. link service login (PDISC) |
| 5660 | case ELS_PRLI: // ext. link service process login |
| 5661 | |
| 5662 | pExchange->fchs.ox_rx_id = ExchangeID; |
| 5663 | pExchange->fchs.ox_rx_id <<= 16; // MSW shift |
| 5664 | pExchange->fchs.ox_rx_id |= 0xffff; // and RX_ID |
| 5665 | |
| 5666 | break; |
| 5667 | |
| 5668 | |
| 5669 | |
| 5670 | |
| 5671 | // RESPONDER types... we must set our RX_ID while preserving |
| 5672 | // sender's OX_ID |
| 5673 | // outgoing (or no) data |
| 5674 | case ELS_RJT: // extended link service reject |
| 5675 | case ELS_LOGO_ACC: // FC-PH extended link service logout accept |
| 5676 | case ELS_ACC: // ext. generic link service accept |
| 5677 | case ELS_PLOGI_ACC:// ext. link service login accept (PLOGI or PDISC) |
| 5678 | case ELS_PRLI_ACC: // ext. link service process login accept |
| 5679 | |
| 5680 | CompleteExchange = TRUE; // Reply (ACC or RJT) is end of exchange |
| 5681 | pExchange->fchs.ox_rx_id |= (ExchangeID & 0xFFFF); |
| 5682 | |
| 5683 | break; |
| 5684 | |
| 5685 | |
| 5686 | // since we are a Responder, OX_ID should already be set by |
| 5687 | // cpqfcTSBuildExchange(). We need to -OR- in RX_ID |
| 5688 | case SCSI_TWE: |
| 5689 | SestType = TRUE; |
| 5690 | // Requirement: set MSB of x_ID for Incoming TL data |
| 5691 | // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50) |
| 5692 | |
| 5693 | pExchange->fchs.ox_rx_id &= 0xFFFF0000; // clear RX_ID |
| 5694 | // Requirement: set MSB of RX_ID for Incoming TL data |
| 5695 | // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50) |
| 5696 | pExchange->fchs.ox_rx_id |= (ExchangeID | 0x8000); |
| 5697 | break; |
| 5698 | |
| 5699 | |
| 5700 | case SCSI_TRE: |
| 5701 | SestType = TRUE; |
| 5702 | |
| 5703 | // there is no XRDY for SEST target read; the data |
| 5704 | // header needs to be updated. Also update the RSP |
| 5705 | // exchange IDs for the status frame, in case it is sent automatically |
| 5706 | fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id |= ExchangeID; |
| 5707 | fcChip->SEST->RspHDR[ ExchangeID ].ox_rx_id = |
| 5708 | fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id; |
| 5709 | |
| 5710 | // for easier FCP response logic (works for TWE and TRE), |
| 5711 | // copy exchange IDs. (Not needed if TRE 'RSP' bit set) |
| 5712 | pExchange->fchs.ox_rx_id = |
| 5713 | fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id; |
| 5714 | |
| 5715 | break; |
| 5716 | |
| 5717 | |
| 5718 | case FCP_RESPONSE: // using existing OX_ID/ RX_ID pair, |
| 5719 | // start SFS FCP-RESPONSE frame |
| 5720 | // OX/RX_ID should already be set! (See "fcBuild" above) |
| 5721 | CompleteExchange = TRUE; // RSP is end of FCP-SCSI exchange |
| 5722 | |
| 5723 | |
| 5724 | break; |
| 5725 | |
| 5726 | |
| 5727 | case BLS_ABTS_RJT: // uses new RX_ID, since SEST x_ID non-existent |
| 5728 | case BLS_ABTS_ACC: // using existing OX_ID/ RX_ID pair from SEST entry |
| 5729 | CompleteExchange = TRUE; // ACC or RJT marks end of FCP-SCSI exchange |
| 5730 | case BLS_ABTS: // using existing OX_ID/ RX_ID pair from SEST entry |
| 5731 | |
| 5732 | |
| 5733 | break; |
| 5734 | |
| 5735 | |
| 5736 | default: |
| 5737 | printk("Error on fcStartExchange: undefined type %Xh(%d)\n", |
| 5738 | pExchange->type, pExchange->type); |
| 5739 | return INVALID_ARGS; |
| 5740 | } |
| 5741 | |
| 5742 | |
| 5743 | // X_ID fields are entered -- copy IRB to Tachyon's ERQ |
| 5744 | |
| 5745 | |
| 5746 | memcpy( |
| 5747 | &fcChip->ERQ->QEntry[ ErqIndex ], // dest. |
| 5748 | &pExchange->IRB, |
| 5749 | 32); // fixed (hardware) length! |
| 5750 | |
| 5751 | PCI_TRACEO( ExchangeID, 0xA0) |
| 5752 | |
| 5753 | // ACTION! May generate INT and IMQ entry |
| 5754 | writel( fcChip->ERQ->producerIndex, |
| 5755 | fcChip->Registers.ERQproducerIndex.address); |
| 5756 | |
| 5757 | |
| 5758 | if( ExchangeID >= TACH_SEST_LEN ) // Link Service Outbound frame? |
| 5759 | { |
| 5760 | |
| 5761 | // wait for completion! (TDB -- timeout and chip reset) |
| 5762 | |
| 5763 | |
| 5764 | PCI_TRACEO( ExchangeID, 0xA4) |
| 5765 | |
| 5766 | enable_irq( cpqfcHBAdata->HostAdapter->irq); // only way to get Sem. |
| 5767 | |
| 5768 | down_interruptible( cpqfcHBAdata->TYOBcomplete); |
| 5769 | |
| 5770 | disable_irq( cpqfcHBAdata->HostAdapter->irq); |
| 5771 | PCI_TRACE( 0xA4) |
| 5772 | |
| 5773 | // On login exchanges, BAD_ALPA (non-existent port_id) results in |
| 5774 | // FTO (Frame Time Out) on the Outbound Completion message. |
| 5775 | // If we got an FTO status, complete the exchange (free up slot) |
| 5776 | if( CompleteExchange || // flag from Reply frames |
| 5777 | pExchange->status ) // typically, can get FRAME_TO |
| 5778 | { |
| 5779 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID); |
| 5780 | } |
| 5781 | } |
| 5782 | |
| 5783 | else // SEST Exchange |
| 5784 | { |
| 5785 | ulStatus = 0; // ship & pray success (e.g. FCP-SCSI) |
| 5786 | |
| 5787 | if( CompleteExchange ) // by Type of exchange (e.g. end-of-xchng) |
| 5788 | { |
| 5789 | cpqfcTSCompleteExchange( cpqfcHBAdata->PciDev, fcChip, ExchangeID); |
| 5790 | } |
| 5791 | |
| 5792 | else |
| 5793 | pExchange->status &= ~EXCHANGE_QUEUED; // clear ExchangeQueued flag |
| 5794 | |
| 5795 | } |
| 5796 | } |
| 5797 | |
| 5798 | |
| 5799 | else // ERQ 'producer' = 'consumer' and QUE is full |
| 5800 | { |
| 5801 | ulStatus = OUTQUE_FULL; // Outbound (ERQ) Que full |
| 5802 | } |
| 5803 | |
| 5804 | Done: |
| 5805 | PCI_TRACE( 0xA0) |
| 5806 | return ulStatus; |
| 5807 | } |
| 5808 | |
| 5809 | |
| 5810 | |
| 5811 | |
| 5812 | |
| 5813 | // Scan fcController->fcExchanges array for a usuable index (a "free" |
| 5814 | // exchange). |
| 5815 | // Inputs: |
| 5816 | // fcChip - pointer to TachLite chip structure |
| 5817 | // Return: |
| 5818 | // index - exchange array element where exchange can be built |
| 5819 | // -1 - exchange array is full |
| 5820 | // REMARKS: |
| 5821 | // Although this is a (yuk!) linear search, we presume |
| 5822 | // that the system will complete exchanges about as quickly as |
| 5823 | // they are submitted. A full Exchange array (and hence, max linear |
| 5824 | // search time for free exchange slot) almost guarantees a Fibre problem |
| 5825 | // of some sort. |
| 5826 | // In the interest of making exchanges easier to debug, we want a LRU |
| 5827 | // (Least Recently Used) scheme. |
| 5828 | |
| 5829 | |
| 5830 | static LONG FindFreeExchange( PTACHYON fcChip, ULONG type ) |
| 5831 | { |
| 5832 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 5833 | ULONG i; |
| 5834 | ULONG ulStatus=-1; // assume failure |
| 5835 | |
| 5836 | |
| 5837 | if( type == SCSI_IRE || |
| 5838 | type == SCSI_TRE || |
| 5839 | type == SCSI_IWE || |
| 5840 | type == SCSI_TWE) |
| 5841 | { |
| 5842 | // SCSI type - X_IDs should be from 0 to TACH_SEST_LEN-1 |
| 5843 | if( fcChip->fcSestExchangeLRU >= TACH_SEST_LEN) // rollover? |
| 5844 | fcChip->fcSestExchangeLRU = 0; |
| 5845 | i = fcChip->fcSestExchangeLRU; // typically it's already free! |
| 5846 | |
| 5847 | if( Exchanges->fcExchange[i].type == 0 ) // check for "free" element |
| 5848 | { |
| 5849 | ulStatus = 0; // success! |
| 5850 | } |
| 5851 | |
| 5852 | else |
| 5853 | { // YUK! we need to do a linear search for free element. |
| 5854 | // Fragmentation of the fcExchange array is due to excessively |
| 5855 | // long completions or timeouts. |
| 5856 | |
| 5857 | while( TRUE ) |
| 5858 | { |
| 5859 | if( ++i >= TACH_SEST_LEN ) // rollover check |
| 5860 | i = 0; // beginning of SEST X_IDs |
| 5861 | |
| 5862 | // printk( "looping for SCSI xchng ID: i=%d, type=%Xh\n", |
| 5863 | // i, Exchanges->fcExchange[i].type); |
| 5864 | |
| 5865 | if( Exchanges->fcExchange[i].type == 0 ) // "free"? |
| 5866 | { |
| 5867 | ulStatus = 0; // success! |
| 5868 | break; |
| 5869 | } |
| 5870 | if( i == fcChip->fcSestExchangeLRU ) // wrapped-around array? |
| 5871 | { |
| 5872 | printk( "SEST X_ID space full\n"); |
| 5873 | break; // failed - prevent inf. loop |
| 5874 | } |
| 5875 | } |
| 5876 | } |
| 5877 | fcChip->fcSestExchangeLRU = i + 1; // next! (rollover check next pass) |
| 5878 | } |
| 5879 | |
| 5880 | |
| 5881 | |
| 5882 | else // Link Service type - X_IDs should be from TACH_SEST_LEN |
| 5883 | // to TACH_MAX_XID |
| 5884 | { |
| 5885 | if( fcChip->fcLsExchangeLRU >= TACH_MAX_XID || // range check |
| 5886 | fcChip->fcLsExchangeLRU < TACH_SEST_LEN ) // (e.g. startup) |
| 5887 | fcChip->fcLsExchangeLRU = TACH_SEST_LEN; |
| 5888 | |
| 5889 | i = fcChip->fcLsExchangeLRU; // typically it's already free! |
| 5890 | if( Exchanges->fcExchange[i].type == 0 ) // check for "free" element |
| 5891 | { |
| 5892 | ulStatus = 0; // success! |
| 5893 | } |
| 5894 | |
| 5895 | else |
| 5896 | { // YUK! we need to do a linear search for free element |
| 5897 | // Fragmentation of the fcExchange array is due to excessively |
| 5898 | // long completions or timeouts. |
| 5899 | |
| 5900 | while( TRUE ) |
| 5901 | { |
| 5902 | if( ++i >= TACH_MAX_XID ) // rollover check |
| 5903 | i = TACH_SEST_LEN;// beginning of Link Service X_IDs |
| 5904 | |
| 5905 | // printk( "looping for xchng ID: i=%d, type=%Xh\n", |
| 5906 | // i, Exchanges->fcExchange[i].type); |
| 5907 | |
| 5908 | if( Exchanges->fcExchange[i].type == 0 ) // "free"? |
| 5909 | { |
| 5910 | ulStatus = 0; // success! |
| 5911 | break; |
| 5912 | } |
| 5913 | if( i == fcChip->fcLsExchangeLRU ) // wrapped-around array? |
| 5914 | { |
| 5915 | printk( "LinkService X_ID space full\n"); |
| 5916 | break; // failed - prevent inf. loop |
| 5917 | } |
| 5918 | } |
| 5919 | } |
| 5920 | fcChip->fcLsExchangeLRU = i + 1; // next! (rollover check next pass) |
| 5921 | |
| 5922 | } |
| 5923 | |
| 5924 | if( !ulStatus ) // success? |
| 5925 | Exchanges->fcExchange[i].type = type; // allocate it. |
| 5926 | |
| 5927 | else |
| 5928 | i = -1; // error - all exchanges "open" |
| 5929 | |
| 5930 | return i; |
| 5931 | } |
| 5932 | |
| 5933 | static void |
| 5934 | cpqfc_pci_unmap_extended_sg(struct pci_dev *pcidev, |
| 5935 | PTACHYON fcChip, |
| 5936 | ULONG x_ID) |
| 5937 | { |
| 5938 | // Unmaps the memory regions used to hold the scatter gather lists |
| 5939 | |
| 5940 | PSGPAGES i; |
| 5941 | |
| 5942 | // Were there any such regions needing unmapping? |
| 5943 | if (! USES_EXTENDED_SGLIST(fcChip->SEST, x_ID)) |
| 5944 | return; // No such regions, we're outta here. |
| 5945 | |
| 5946 | // for each extended scatter gather region needing unmapping... |
| 5947 | for (i=fcChip->SEST->sgPages[x_ID] ; i != NULL ; i = i->next) |
| 5948 | pci_unmap_single(pcidev, i->busaddr, i->maplen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5949 | PCI_DMA_TODEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5950 | } |
| 5951 | |
| 5952 | // Called also from cpqfcTScontrol.o, so can't be static |
| 5953 | void |
| 5954 | cpqfc_pci_unmap(struct pci_dev *pcidev, |
| 5955 | Scsi_Cmnd *cmd, |
| 5956 | PTACHYON fcChip, |
| 5957 | ULONG x_ID) |
| 5958 | { |
| 5959 | // Undo the DMA mappings |
| 5960 | if (cmd->use_sg) { // Used scatter gather list for data buffer? |
| 5961 | cpqfc_pci_unmap_extended_sg(pcidev, fcChip, x_ID); |
| 5962 | pci_unmap_sg(pcidev, cmd->buffer, cmd->use_sg, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5963 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5964 | // printk("umsg %d\n", cmd->use_sg); |
| 5965 | } |
| 5966 | else if (cmd->request_bufflen) { |
| 5967 | // printk("ums %p ", fcChip->SEST->u[ x_ID ].IWE.GAddr1); |
| 5968 | pci_unmap_single(pcidev, fcChip->SEST->u[ x_ID ].IWE.GAddr1, |
| 5969 | cmd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 5970 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5971 | } |
| 5972 | } |
| 5973 | |
| 5974 | // We call this routine to free an Exchange for any reason: |
| 5975 | // completed successfully, completed with error, aborted, etc. |
| 5976 | |
| 5977 | // returns FALSE if Exchange failed and "retry" is acceptable |
| 5978 | // returns TRUE if Exchange was successful, or retry is impossible |
| 5979 | // (e.g. port/device gone). |
| 5980 | //scompleteexchange |
| 5981 | |
| 5982 | void cpqfcTSCompleteExchange( |
| 5983 | struct pci_dev *pcidev, |
| 5984 | PTACHYON fcChip, |
| 5985 | ULONG x_ID) |
| 5986 | { |
| 5987 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 5988 | int already_unmapped = 0; |
| 5989 | |
| 5990 | if( x_ID < TACH_SEST_LEN ) // SEST-based (or LinkServ for FCP exchange) |
| 5991 | { |
| 5992 | if( Exchanges->fcExchange[ x_ID ].Cmnd == NULL ) // what#@! |
| 5993 | { |
| 5994 | // TriggerHBA( fcChip->Registers.ReMapMemBase, 0); |
| 5995 | printk(" x_ID %Xh, type %Xh, NULL ptr!\n", x_ID, |
| 5996 | Exchanges->fcExchange[ x_ID ].type); |
| 5997 | |
| 5998 | goto CleanUpSestResources; // this path should be very rare. |
| 5999 | } |
| 6000 | |
| 6001 | // we have Linux Scsi Cmnd ptr..., now check our Exchange status |
| 6002 | // to decide how to complete this SEST FCP exchange |
| 6003 | |
| 6004 | if( Exchanges->fcExchange[ x_ID ].status ) // perhaps a Tach indicated problem, |
| 6005 | // or abnormal exchange completion |
| 6006 | { |
| 6007 | // set FCP Link statistics |
| 6008 | |
| 6009 | if( Exchanges->fcExchange[ x_ID ].status & FC2_TIMEOUT) |
| 6010 | fcChip->fcStats.timeouts++; |
| 6011 | if( Exchanges->fcExchange[ x_ID ].status & INITIATOR_ABORT) |
| 6012 | fcChip->fcStats.FC4aborted++; |
| 6013 | if( Exchanges->fcExchange[ x_ID ].status & COUNT_ERROR) |
| 6014 | fcChip->fcStats.CntErrors++; |
| 6015 | if( Exchanges->fcExchange[ x_ID ].status & LINKFAIL_TX) |
| 6016 | fcChip->fcStats.linkFailTX++; |
| 6017 | if( Exchanges->fcExchange[ x_ID ].status & LINKFAIL_RX) |
| 6018 | fcChip->fcStats.linkFailRX++; |
| 6019 | if( Exchanges->fcExchange[ x_ID ].status & OVERFLOW) |
| 6020 | fcChip->fcStats.CntErrors++; |
| 6021 | |
| 6022 | // First, see if the Scsi upper level initiated an ABORT on this |
| 6023 | // exchange... |
| 6024 | if( Exchanges->fcExchange[ x_ID ].status == INITIATOR_ABORT ) |
| 6025 | { |
| 6026 | printk(" DID_ABORT, x_ID %Xh, Cmnd %p ", |
| 6027 | x_ID, Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6028 | goto CleanUpSestResources; // (we don't expect Linux _aborts) |
| 6029 | } |
| 6030 | |
| 6031 | // Did our driver timeout the Exchange, or did Tachyon indicate |
| 6032 | // a failure during transmission? Ask for retry with "SOFT_ERROR" |
| 6033 | else if( Exchanges->fcExchange[ x_ID ].status & FC2_TIMEOUT) |
| 6034 | { |
| 6035 | // printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n", |
| 6036 | // x_ID, Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6037 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16); |
| 6038 | } |
| 6039 | |
| 6040 | // Did frame(s) for an open exchange arrive in the SFQ, |
| 6041 | // meaning the SEST was unable to process them? |
| 6042 | else if( Exchanges->fcExchange[ x_ID ].status & SFQ_FRAME) |
| 6043 | { |
| 6044 | // printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n", |
| 6045 | // x_ID, Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6046 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16); |
| 6047 | } |
| 6048 | |
| 6049 | // Did our driver timeout the Exchange, or did Tachyon indicate |
| 6050 | // a failure during transmission? Ask for retry with "SOFT_ERROR" |
| 6051 | else if( |
| 6052 | (Exchanges->fcExchange[ x_ID ].status & LINKFAIL_TX) || |
| 6053 | (Exchanges->fcExchange[ x_ID ].status & PORTID_CHANGED) || |
| 6054 | (Exchanges->fcExchange[ x_ID ].status & FRAME_TO) || |
| 6055 | (Exchanges->fcExchange[ x_ID ].status & INV_ENTRY) || |
| 6056 | (Exchanges->fcExchange[ x_ID ].status & ABORTSEQ_NOTIFY) ) |
| 6057 | |
| 6058 | |
| 6059 | { |
| 6060 | // printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n", |
| 6061 | // x_ID, Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6062 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16); |
| 6063 | |
| 6064 | |
| 6065 | } |
| 6066 | |
| 6067 | // e.g., a LOGOut happened, or device never logged back in. |
| 6068 | else if( Exchanges->fcExchange[ x_ID ].status & DEVICE_REMOVED) |
| 6069 | { |
| 6070 | // printk(" *LOGOut or timeout on login!* "); |
| 6071 | // trigger? |
| 6072 | // TriggerHBA( fcChip->Registers.ReMapMemBase, 0); |
| 6073 | |
| 6074 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_BAD_TARGET <<16); |
| 6075 | } |
| 6076 | |
| 6077 | |
| 6078 | // Did Tachyon indicate a CNT error? We need further analysis |
| 6079 | // to determine if the exchange is acceptable |
| 6080 | else if( Exchanges->fcExchange[ x_ID ].status == COUNT_ERROR) |
| 6081 | { |
| 6082 | UCHAR ScsiStatus; |
| 6083 | FCP_STATUS_RESPONSE *pFcpStatus = |
| 6084 | (PFCP_STATUS_RESPONSE)&fcChip->SEST->RspHDR[ x_ID ].pl; |
| 6085 | |
| 6086 | ScsiStatus = pFcpStatus->fcp_status >>24; |
| 6087 | |
| 6088 | // If the command is a SCSI Read/Write type, we don't tolerate |
| 6089 | // count errors of any kind; assume the count error is due to |
| 6090 | // a dropped frame and ask for retry... |
| 6091 | |
| 6092 | if(( (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x8) || |
| 6093 | (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x28) || |
| 6094 | (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0xA) || |
| 6095 | (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x2A) ) |
| 6096 | && |
| 6097 | ScsiStatus == 0 ) |
| 6098 | { |
| 6099 | // ask for retry |
| 6100 | /* printk("COUNT_ERROR retry, x_ID %Xh, status %Xh, Cmnd %p\n", |
| 6101 | x_ID, Exchanges->fcExchange[ x_ID ].status, |
| 6102 | Exchanges->fcExchange[ x_ID ].Cmnd);*/ |
| 6103 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16); |
| 6104 | } |
| 6105 | |
| 6106 | else // need more analysis |
| 6107 | { |
| 6108 | cpqfcTSCheckandSnoopFCP(fcChip, x_ID); // (will set ->result) |
| 6109 | } |
| 6110 | } |
| 6111 | |
| 6112 | // default: NOTE! We don't ever want to get here. Getting here |
| 6113 | // implies something new is happening that we've never had a test |
| 6114 | // case for. Need code maintenance! Return "ERROR" |
| 6115 | else |
| 6116 | { |
| 6117 | unsigned int stat = Exchanges->fcExchange[ x_ID ].status; |
| 6118 | printk("DEFAULT result %Xh, x_ID %Xh, Cmnd %p", |
| 6119 | Exchanges->fcExchange[ x_ID ].status, x_ID, |
| 6120 | Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6121 | |
| 6122 | if (stat & INVALID_ARGS) printk(" INVALID_ARGS "); |
| 6123 | if (stat & LNKDWN_OSLS) printk(" LNKDWN_OSLS "); |
| 6124 | if (stat & LNKDWN_LASER) printk(" LNKDWN_LASER "); |
| 6125 | if (stat & OUTQUE_FULL) printk(" OUTQUE_FULL "); |
| 6126 | if (stat & DRIVERQ_FULL) printk(" DRIVERQ_FULL "); |
| 6127 | if (stat & SEST_FULL) printk(" SEST_FULL "); |
| 6128 | if (stat & BAD_ALPA) printk(" BAD_ALPA "); |
| 6129 | if (stat & OVERFLOW) printk(" OVERFLOW "); |
| 6130 | if (stat & COUNT_ERROR) printk(" COUNT_ERROR "); |
| 6131 | if (stat & LINKFAIL_RX) printk(" LINKFAIL_RX "); |
| 6132 | if (stat & ABORTSEQ_NOTIFY) printk(" ABORTSEQ_NOTIFY "); |
| 6133 | if (stat & LINKFAIL_TX) printk(" LINKFAIL_TX "); |
| 6134 | if (stat & HOSTPROG_ERR) printk(" HOSTPROG_ERR "); |
| 6135 | if (stat & FRAME_TO) printk(" FRAME_TO "); |
| 6136 | if (stat & INV_ENTRY) printk(" INV_ENTRY "); |
| 6137 | if (stat & SESTPROG_ERR) printk(" SESTPROG_ERR "); |
| 6138 | if (stat & OUTBOUND_TIMEOUT) printk(" OUTBOUND_TIMEOUT "); |
| 6139 | if (stat & INITIATOR_ABORT) printk(" INITIATOR_ABORT "); |
| 6140 | if (stat & MEMPOOL_FAIL) printk(" MEMPOOL_FAIL "); |
| 6141 | if (stat & FC2_TIMEOUT) printk(" FC2_TIMEOUT "); |
| 6142 | if (stat & TARGET_ABORT) printk(" TARGET_ABORT "); |
| 6143 | if (stat & EXCHANGE_QUEUED) printk(" EXCHANGE_QUEUED "); |
| 6144 | if (stat & PORTID_CHANGED) printk(" PORTID_CHANGED "); |
| 6145 | if (stat & DEVICE_REMOVED) printk(" DEVICE_REMOVED "); |
| 6146 | if (stat & SFQ_FRAME) printk(" SFQ_FRAME "); |
| 6147 | printk("\n"); |
| 6148 | |
| 6149 | Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_ERROR <<16); |
| 6150 | } |
| 6151 | } |
| 6152 | else // definitely no Tach problem, but perhaps an FCP problem |
| 6153 | { |
| 6154 | // set FCP Link statistic |
| 6155 | fcChip->fcStats.ok++; |
| 6156 | cpqfcTSCheckandSnoopFCP( fcChip, x_ID); // (will set ->result) |
| 6157 | } |
| 6158 | |
| 6159 | cpqfc_pci_unmap(pcidev, Exchanges->fcExchange[x_ID].Cmnd, |
| 6160 | fcChip, x_ID); // undo DMA mappings. |
| 6161 | already_unmapped = 1; |
| 6162 | |
| 6163 | // OK, we've set the Scsi "->result" field, so proceed with calling |
| 6164 | // Linux Scsi "done" (if not NULL), and free any kernel memory we |
| 6165 | // may have allocated for the exchange. |
| 6166 | |
| 6167 | PCI_TRACEO( (ULONG)Exchanges->fcExchange[x_ID].Cmnd, 0xAC); |
| 6168 | // complete the command back to upper Scsi drivers |
| 6169 | if( Exchanges->fcExchange[ x_ID ].Cmnd->scsi_done != NULL) |
| 6170 | { |
| 6171 | // Calling "done" on an Linux _abort() aborted |
| 6172 | // Cmnd causes a kernel panic trying to re-free mem. |
| 6173 | // Actually, we shouldn't do anything with an _abort CMND |
| 6174 | if( Exchanges->fcExchange[ x_ID ].Cmnd->result != (DID_ABORT<<16) ) |
| 6175 | { |
| 6176 | PCI_TRACE(0xAC) |
| 6177 | call_scsi_done(Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6178 | } |
| 6179 | else |
| 6180 | { |
| 6181 | // printk(" not calling scsi_done on x_ID %Xh, Cmnd %p\n", |
| 6182 | // x_ID, Exchanges->fcExchange[ x_ID ].Cmnd); |
| 6183 | } |
| 6184 | } |
| 6185 | else{ |
| 6186 | printk(" x_ID %Xh, type %Xh, Cdb0 %Xh\n", x_ID, |
| 6187 | Exchanges->fcExchange[ x_ID ].type, |
| 6188 | Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0]); |
| 6189 | printk(" cpqfcTS: Null scsi_done function pointer!\n"); |
| 6190 | } |
| 6191 | |
| 6192 | |
| 6193 | // Now, clean up non-Scsi_Cmnd items... |
| 6194 | CleanUpSestResources: |
| 6195 | |
| 6196 | if (!already_unmapped) |
| 6197 | cpqfc_pci_unmap(pcidev, Exchanges->fcExchange[x_ID].Cmnd, |
| 6198 | fcChip, x_ID); // undo DMA mappings. |
| 6199 | |
| 6200 | // Was an Extended Scatter/Gather page allocated? We know |
| 6201 | // this by checking DWORD 4, bit 31 ("LOC") of SEST entry |
| 6202 | if( !(fcChip->SEST->u[ x_ID ].IWE.Buff_Off & 0x80000000)) |
| 6203 | { |
| 6204 | PSGPAGES p, next; |
| 6205 | |
| 6206 | // extended S/G list was used -- Free the allocated ext. S/G pages |
| 6207 | for (p = fcChip->SEST->sgPages[x_ID]; p != NULL; p = next) { |
| 6208 | next = p->next; |
| 6209 | kfree(p); |
| 6210 | } |
| 6211 | fcChip->SEST->sgPages[x_ID] = NULL; |
| 6212 | } |
| 6213 | |
| 6214 | Exchanges->fcExchange[ x_ID ].Cmnd = NULL; |
| 6215 | } // Done with FCP (SEST) exchanges |
| 6216 | |
| 6217 | |
| 6218 | // the remaining logic is common to ALL Exchanges: |
| 6219 | // FCP(SEST) and LinkServ. |
| 6220 | |
| 6221 | Exchanges->fcExchange[ x_ID ].type = 0; // there -- FREE! |
| 6222 | Exchanges->fcExchange[ x_ID ].status = 0; |
| 6223 | |
| 6224 | PCI_TRACEO( x_ID, 0xAC) |
| 6225 | |
| 6226 | |
| 6227 | return; |
| 6228 | } // (END of CompleteExchange function) |
| 6229 | |
| 6230 | |
| 6231 | |
| 6232 | |
| 6233 | // Unfortunately, we must snoop all command completions in |
| 6234 | // order to manipulate certain return fields, and take note of |
| 6235 | // device types, etc., to facilitate the Fibre-Channel to SCSI |
| 6236 | // "mapping". |
| 6237 | // (Watch for BIG Endian confusion on some payload fields) |
| 6238 | void cpqfcTSCheckandSnoopFCP( PTACHYON fcChip, ULONG x_ID) |
| 6239 | { |
| 6240 | FC_EXCHANGES *Exchanges = fcChip->Exchanges; |
| 6241 | Scsi_Cmnd *Cmnd = Exchanges->fcExchange[ x_ID].Cmnd; |
| 6242 | FCP_STATUS_RESPONSE *pFcpStatus = |
| 6243 | (PFCP_STATUS_RESPONSE)&fcChip->SEST->RspHDR[ x_ID ].pl; |
| 6244 | UCHAR ScsiStatus; |
| 6245 | |
| 6246 | ScsiStatus = pFcpStatus->fcp_status >>24; |
| 6247 | |
| 6248 | #ifdef FCP_COMPLETION_DBG |
| 6249 | printk("ScsiStatus = 0x%X\n", ScsiStatus); |
| 6250 | #endif |
| 6251 | |
| 6252 | // First, check FCP status |
| 6253 | if( pFcpStatus->fcp_status & FCP_RSP_LEN_VALID ) |
| 6254 | { |
| 6255 | // check response code (RSP_CODE) -- most popular is bad len |
| 6256 | // 1st 4 bytes of rsp info -- only byte 3 interesting |
| 6257 | if( pFcpStatus->fcp_rsp_info & FCP_DATA_LEN_NOT_BURST_LEN ) |
| 6258 | { |
| 6259 | |
| 6260 | // do we EVER get here? |
| 6261 | printk("cpqfcTS: FCP data len not burst len, x_ID %Xh\n", x_ID); |
| 6262 | } |
| 6263 | } |
| 6264 | |
| 6265 | // for now, go by the ScsiStatus, and manipulate certain |
| 6266 | // commands when necessary... |
| 6267 | if( ScsiStatus == 0) // SCSI status byte "good"? |
| 6268 | { |
| 6269 | Cmnd->result = 0; // everything's OK |
| 6270 | |
| 6271 | if( (Cmnd->cmnd[0] == INQUIRY)) |
| 6272 | { |
| 6273 | UCHAR *InquiryData = Cmnd->request_buffer; |
| 6274 | PFC_LOGGEDIN_PORT pLoggedInPort; |
| 6275 | |
| 6276 | // We need to manipulate INQUIRY |
| 6277 | // strings for COMPAQ RAID controllers to force |
| 6278 | // Linux to scan additional LUNs. Namely, set |
| 6279 | // the Inquiry string byte 2 (ANSI-approved version) |
| 6280 | // to 2. |
| 6281 | |
| 6282 | if( !memcmp( &InquiryData[8], "COMPAQ", 6 )) |
| 6283 | { |
| 6284 | InquiryData[2] = 0x2; // claim SCSI-2 compliance, |
| 6285 | // so multiple LUNs may be scanned. |
| 6286 | // (no SCSI-2 problems known in CPQ) |
| 6287 | } |
| 6288 | |
| 6289 | // snoop the Inquiry to detect Disk, Tape, etc. type |
| 6290 | // (search linked list for the port_id we sent INQUIRY to) |
| 6291 | pLoggedInPort = fcFindLoggedInPort( fcChip, |
| 6292 | NULL, // DON'T search Scsi Nexus (we will set it) |
| 6293 | Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF, |
| 6294 | NULL, // DON'T search linked list for FC WWN |
| 6295 | NULL); // DON'T care about end of list |
| 6296 | |
| 6297 | if( pLoggedInPort ) |
| 6298 | { |
| 6299 | pLoggedInPort->ScsiNexus.InqDeviceType = InquiryData[0]; |
| 6300 | } |
| 6301 | else |
| 6302 | { |
| 6303 | printk("cpqfcTS: can't find LoggedIn FC port %06X for INQUIRY\n", |
| 6304 | Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF); |
| 6305 | } |
| 6306 | } |
| 6307 | } |
| 6308 | |
| 6309 | |
| 6310 | // Scsi Status not good -- pass it back to caller |
| 6311 | |
| 6312 | else |
| 6313 | { |
| 6314 | Cmnd->result = ScsiStatus; // SCSI status byte is 1st |
| 6315 | |
| 6316 | // check for valid "sense" data |
| 6317 | |
| 6318 | if( pFcpStatus->fcp_status & FCP_SNS_LEN_VALID ) |
| 6319 | { // limit Scsi Sense field length! |
| 6320 | int SenseLen = pFcpStatus->fcp_sns_len >>24; // (BigEndian) lower byte |
| 6321 | |
| 6322 | SenseLen = SenseLen > sizeof( Cmnd->sense_buffer) ? |
| 6323 | sizeof( Cmnd->sense_buffer) : SenseLen; |
| 6324 | |
| 6325 | |
| 6326 | #ifdef FCP_COMPLETION_DBG |
| 6327 | printk("copy sense_buffer %p, len %d, result %Xh\n", |
| 6328 | Cmnd->sense_buffer, SenseLen, Cmnd->result); |
| 6329 | #endif |
| 6330 | |
| 6331 | // NOTE: There is some dispute over the FCP response |
| 6332 | // format. Most FC devices assume that FCP_RSP_INFO |
| 6333 | // is 8 bytes long, in spite of the fact that FCP_RSP_LEN |
| 6334 | // is (virtually) always 0 and the field is "invalid". |
| 6335 | // Some other devices assume that |
| 6336 | // the FCP_SNS_INFO begins after FCP_RSP_LEN bytes (i.e. 0) |
| 6337 | // when the FCP_RSP is invalid (this almost appears to be |
| 6338 | // one of those "religious" issues). |
| 6339 | // Consequently, we test the usual position of FCP_SNS_INFO |
| 6340 | // for 7Xh, since the SCSI sense format says the first |
| 6341 | // byte ("error code") should be 0x70 or 0x71. In practice, |
| 6342 | // we find that every device does in fact have 0x70 or 0x71 |
| 6343 | // in the first byte position, so this test works for all |
| 6344 | // FC devices. |
| 6345 | // (This logic is especially effective for the CPQ/DEC HSG80 |
| 6346 | // & HSG60 controllers). |
| 6347 | |
| 6348 | if( (pFcpStatus->fcp_sns_info[0] & 0x70) == 0x70 ) |
| 6349 | memcpy( Cmnd->sense_buffer, |
| 6350 | &pFcpStatus->fcp_sns_info[0], SenseLen); |
| 6351 | else |
| 6352 | { |
| 6353 | unsigned char *sbPtr = |
| 6354 | (unsigned char *)&pFcpStatus->fcp_sns_info[0]; |
| 6355 | sbPtr -= 8; // back up 8 bytes hoping to find the |
| 6356 | // start of the sense buffer |
| 6357 | memcpy( Cmnd->sense_buffer, sbPtr, SenseLen); |
| 6358 | } |
| 6359 | |
| 6360 | // in the special case of Device Reset, tell upper layer |
| 6361 | // to immediately retry (with SOFT_ERROR status) |
| 6362 | // look for Sense Key Unit Attention (0x6) with ASC Device |
| 6363 | // Reset (0x29) |
| 6364 | // printk("SenseLen %d, Key = 0x%X, ASC = 0x%X\n", |
| 6365 | // SenseLen, Cmnd->sense_buffer[2], |
| 6366 | // Cmnd->sense_buffer[12]); |
| 6367 | if( ((Cmnd->sense_buffer[2] & 0xF) == 0x6) && |
| 6368 | (Cmnd->sense_buffer[12] == 0x29) ) // Sense Code "reset" |
| 6369 | { |
| 6370 | Cmnd->result |= (DID_SOFT_ERROR << 16); // "Host" status byte 3rd |
| 6371 | } |
| 6372 | |
| 6373 | // check for SenseKey "HARDWARE ERROR", ASC InternalTargetFailure |
| 6374 | else if( ((Cmnd->sense_buffer[2] & 0xF) == 0x4) && // "hardware error" |
| 6375 | (Cmnd->sense_buffer[12] == 0x44) ) // Addtl. Sense Code |
| 6376 | { |
| 6377 | // printk("HARDWARE_ERROR, Channel/Target/Lun %d/%d/%d\n", |
| 6378 | // Cmnd->channel, Cmnd->target, Cmnd->lun); |
| 6379 | Cmnd->result |= (DID_ERROR << 16); // "Host" status byte 3rd |
| 6380 | } |
| 6381 | |
| 6382 | } // (end of sense len valid) |
| 6383 | |
| 6384 | // there is no sense data to help out Linux's Scsi layers... |
| 6385 | // We'll just return the Scsi status and hope he will "do the |
| 6386 | // right thing" |
| 6387 | else |
| 6388 | { |
| 6389 | // as far as we know, the Scsi status is sufficient |
| 6390 | Cmnd->result |= (DID_OK << 16); // "Host" status byte 3rd |
| 6391 | } |
| 6392 | } |
| 6393 | } |
| 6394 | |
| 6395 | |
| 6396 | |
| 6397 | //PPPPPPPPPPPPPPPPPPPPPPPPP PAYLOAD PPPPPPPPP |
| 6398 | // build data PAYLOAD; SCSI FCP_CMND I.U. |
| 6399 | // remember BIG ENDIAN payload - DWord values must be byte-reversed |
| 6400 | // (hence the affinity for byte pointer building). |
| 6401 | |
| 6402 | static int build_FCP_payload( Scsi_Cmnd *Cmnd, |
| 6403 | UCHAR* payload, ULONG type, ULONG fcp_dl ) |
| 6404 | { |
| 6405 | int i; |
| 6406 | |
| 6407 | |
| 6408 | switch( type) |
| 6409 | { |
| 6410 | |
| 6411 | case SCSI_IWE: |
| 6412 | case SCSI_IRE: |
| 6413 | // 8 bytes FCP_LUN |
| 6414 | // Peripheral Device or Volume Set addressing, and LUN mapping |
| 6415 | // When the FC port was looked up, we copied address mode |
| 6416 | // and any LUN mask to the scratch pad SCp.phase & .mode |
| 6417 | |
| 6418 | *payload++ = (UCHAR)Cmnd->SCp.phase; |
| 6419 | |
| 6420 | // Now, because of "lun masking" |
| 6421 | // (aka selective storage presentation), |
| 6422 | // the contiguous Linux Scsi lun number may not match the |
| 6423 | // device's lun number, so we may have to "map". |
| 6424 | |
| 6425 | *payload++ = (UCHAR)Cmnd->SCp.have_data_in; |
| 6426 | |
| 6427 | // We don't know of anyone in the FC business using these |
| 6428 | // extra "levels" of addressing. In fact, confusion still exists |
| 6429 | // just using the FIRST level... ;-) |
| 6430 | |
| 6431 | *payload++ = 0; // 2nd level addressing |
| 6432 | *payload++ = 0; |
| 6433 | *payload++ = 0; // 3rd level addressing |
| 6434 | *payload++ = 0; |
| 6435 | *payload++ = 0; // 4th level addressing |
| 6436 | *payload++ = 0; |
| 6437 | |
| 6438 | // 4 bytes Control Field FCP_CNTL |
| 6439 | *payload++ = 0; // byte 0: (MSB) reserved |
| 6440 | *payload++ = 0; // byte 1: task codes |
| 6441 | |
| 6442 | // byte 2: task management flags |
| 6443 | // another "use" of the spare field to accomplish TDR |
| 6444 | // note combination needed |
| 6445 | if( (Cmnd->cmnd[0] == RELEASE) && |
| 6446 | (Cmnd->SCp.buffers_residual == FCP_TARGET_RESET) ) |
| 6447 | { |
| 6448 | Cmnd->cmnd[0] = 0; // issue "Test Unit Ready" for TDR |
| 6449 | *payload++ = 0x20; // target device reset bit |
| 6450 | } |
| 6451 | else |
| 6452 | *payload++ = 0; // no TDR |
| 6453 | // byte 3: (LSB) execution management codes |
| 6454 | // bit 0 write, bit 1 read (don't set together) |
| 6455 | |
| 6456 | if( fcp_dl != 0 ) |
| 6457 | { |
| 6458 | if( type == SCSI_IWE ) // WRITE |
| 6459 | *payload++ = 1; |
| 6460 | else // READ |
| 6461 | *payload++ = 2; |
| 6462 | } |
| 6463 | else |
| 6464 | { |
| 6465 | // On some devices, if RD or WR bits are set, |
| 6466 | // and fcp_dl is 0, they will generate an error on the command. |
| 6467 | // (i.e., if direction is specified, they insist on a length). |
| 6468 | *payload++ = 0; // no data (necessary for CPQ) |
| 6469 | } |
| 6470 | |
| 6471 | |
| 6472 | // NOTE: clean this up if/when MAX_COMMAND_SIZE is increased to 16 |
| 6473 | // FCP_CDB allows 16 byte SCSI command descriptor blk; |
| 6474 | // Linux SCSI CDB array is MAX_COMMAND_SIZE (12 at this time...) |
| 6475 | for( i=0; (i < Cmnd->cmd_len) && i < MAX_COMMAND_SIZE; i++) |
| 6476 | *payload++ = Cmnd->cmnd[i]; |
| 6477 | |
| 6478 | // if( Cmnd->cmd_len == 16 ) |
| 6479 | // { |
| 6480 | // memcpy( payload, &Cmnd->SCp.buffers_residual, 4); |
| 6481 | // } |
| 6482 | payload+= (16 - i); |
| 6483 | |
| 6484 | // FCP_DL is largest number of expected data bytes |
| 6485 | // per CDB (i.e. read/write command) |
| 6486 | *payload++ = (UCHAR)(fcp_dl >>24); // (MSB) 8 bytes data len FCP_DL |
| 6487 | *payload++ = (UCHAR)(fcp_dl >>16); |
| 6488 | *payload++ = (UCHAR)(fcp_dl >>8); |
| 6489 | *payload++ = (UCHAR)fcp_dl; // (LSB) |
| 6490 | break; |
| 6491 | |
| 6492 | case SCSI_TWE: // need FCP_XFER_RDY |
| 6493 | *payload++ = 0; // (4 bytes) DATA_RO (MSB byte 0) |
| 6494 | *payload++ = 0; |
| 6495 | *payload++ = 0; |
| 6496 | *payload++ = 0; // LSB (byte 3) |
| 6497 | // (4 bytes) BURST_LEN |
| 6498 | // size of following FCP_DATA payload |
| 6499 | *payload++ = (UCHAR)(fcp_dl >>24); // (MSB) 8 bytes data len FCP_DL |
| 6500 | *payload++ = (UCHAR)(fcp_dl >>16); |
| 6501 | *payload++ = (UCHAR)(fcp_dl >>8); |
| 6502 | *payload++ = (UCHAR)fcp_dl; // (LSB) |
| 6503 | // 4 bytes RESERVED |
| 6504 | *payload++ = 0; |
| 6505 | *payload++ = 0; |
| 6506 | *payload++ = 0; |
| 6507 | *payload++ = 0; |
| 6508 | break; |
| 6509 | |
| 6510 | default: |
| 6511 | break; |
| 6512 | } |
| 6513 | |
| 6514 | return 0; |
| 6515 | } |
| 6516 | |