patch-2.2.18 linux/drivers/scsi/cpqfcTSworker.c
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- Lines: 6239
- Date:
Fri Sep 15 22:44:39 2000
- Orig file:
v2.2.17/drivers/scsi/cpqfcTSworker.c
- Orig date:
Thu Jan 1 01:00:00 1970
diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/scsi/cpqfcTSworker.c linux/drivers/scsi/cpqfcTSworker.c
@@ -0,0 +1,6238 @@
+/* Copyright(c) 2000, Compaq Computer Corporation
+ * Fibre Channel Host Bus Adapter
+ * 64-bit, 66MHz PCI
+ * Originally developed and tested on:
+ * (front): [chip] Tachyon TS HPFC-5166A/1.2 L2C1090 ...
+ * SP# P225CXCBFIEL6T, Rev XC
+ * SP# 161290-001, Rev XD
+ * (back): Board No. 010008-001 A/W Rev X5, FAB REV X5
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ * Written by Don Zimmerman
+*/
+
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/blk.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/smp_lock.h>
+
+#define __KERNEL_SYSCALLS__
+
+#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGTERM))
+
+#include <linux/unistd.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+
+
+
+#include "sd.h"
+#include "hosts.h" // struct Scsi_Host definition for T handler
+#include "cpqfcTSchip.h"
+#include "cpqfcTSstructs.h"
+
+//#define LOGIN_DBG 1
+
+// REMARKS:
+// Since Tachyon chips may be permitted to wait from 500ms up to 2 sec
+// to empty an outgoing frame from its FIFO to the Fibre Channel stream,
+// we cannot do everything we need to in the interrupt handler. Specifically,
+// every time a link re-init (e.g. LIP) takes place, all SCSI I/O has to be
+// suspended until the login sequences have been completed. Login commands
+// are frames just like SCSI commands are frames; they are subject to the same
+// timeout issues and delays. Also, various specs provide up to 2 seconds for
+// devices to log back in (i.e. respond with ACC to a login frame), so I/O to
+// that device has to be suspended.
+// A serious problem here occurs on highly loaded FC-AL systems. If our FC port
+// has a low priority (e.g. high arbitrated loop physical address, alpa), and
+// some other device is hogging bandwidth (permissible under FC-AL), we might
+// time out thinking the link is hung, when it's simply busy. Many such
+// considerations complicate the design. Although Tachyon assumes control
+// (in silicon) for many link-specific issues, the Linux driver is left with the
+// rest, which turns out to be a difficult, time critical chore.
+
+// These "worker" functions will handle things like FC Logins; all
+// processes with I/O to our device must wait for the Login to complete
+// and (if successful) I/O to resume. In the event of a malfunctioning or
+// very busy loop, it may take hundreds of millisecs or even seconds to complete
+// a frame send. We don't want to hang up the entire server (and all
+// processes which don't depend on Fibre) during this wait.
+
+// The Tachyon chip can have around 30,000 I/O operations ("exchanges")
+// open at one time. However, each exchange must be initiated
+// synchronously (i.e. each of the 30k I/O had to be started one at a
+// time by sending a starting frame via Tachyon's outbound que).
+
+// To accomodate kernel "module" build, this driver limits the exchanges
+// to 256, because of the contiguous physical memory limitation of 128M.
+
+// Typical FC Exchanges are opened presuming the FC frames start without errors,
+// while Exchange completion is handled in the interrupt handler. This
+// optimizes performance for the "everything's working" case.
+// However, when we have FC related errors or hot plugging of FC ports, we pause
+// I/O and handle FC-specific tasks in the worker thread. These FC-specific
+// functions will handle things like FC Logins and Aborts. As the Login sequence
+// completes to each and every target, I/O can resume to that target.
+
+// Our kernel "worker thread" must share the HBA with threads calling
+// "queuecommand". We define a "BoardLock" semaphore which indicates
+// to "queuecommand" that the HBA is unavailable, and Cmnds are added to a
+// board lock Q. When the worker thread finishes with the board, the board
+// lock Q commands are completed with status causing immediate retry.
+// Typically, the board is locked while Logins are in progress after an
+// FC Link Down condition. When Cmnds are re-queued after board lock, the
+// particular Scsi channel/target may or may not have logged back in. When
+// the device is waiting for login, the "prli" flag is clear, in which case
+// commands are passed to a Link Down Q. Whenever the login finally completes,
+// the LinkDown Q is completed, again with status causing immediate retry.
+// When FC devices are logged in, we build and start FC commands to the
+// devices.
+
+// NOTE!! As of May 2000, kernel 2.2.14, the error recovery logic for devices
+// that never log back in (e.g. physically removed) is NOT completely
+// understood. I've still seen instances of system hangs on failed Write
+// commands (possibly from the ext2 layer?) on device removal. Such special
+// cases need to be evaluated from a system/application view - e.g., how
+// exactly does the system want me to complete commands when the device is
+// physically removed??
+
+// local functions
+
+static void SetLoginFields(
+ PFC_LOGGEDIN_PORT pLoggedInPort,
+ TachFCHDR_GCMND* fchs,
+ BOOLEAN PDisc,
+ BOOLEAN Originator);
+
+static void AnalyzeIncomingFrame(
+ CPQFCHBA *cpqfcHBAdata,
+ ULONG QNdx );
+
+static void SendLogins( CPQFCHBA *cpqfcHBAdata, __u32 *FabricPortIds );
+
+static int verify_PLOGI( PTACHYON fcChip,
+ TachFCHDR_GCMND* fchs, ULONG* reject_explain);
+static int verify_PRLI( TachFCHDR_GCMND* fchs, ULONG* reject_explain);
+
+static void LoadWWN( PTACHYON fcChip, UCHAR* dest, UCHAR type);
+static void BuildLinkServicePayload(
+ PTACHYON fcChip, ULONG type, void* payload);
+
+static void UnblockScsiDevice( struct Scsi_Host *HostAdapter,
+ PFC_LOGGEDIN_PORT pLoggedInPort);
+
+static void cpqfcTSCheckandSnoopFCP( PTACHYON fcChip, ULONG x_ID);
+
+static void CompleteBoardLockCmnd( CPQFCHBA *cpqfcHBAdata);
+
+static void RevalidateSEST( struct Scsi_Host *HostAdapter,
+ PFC_LOGGEDIN_PORT pLoggedInPort);
+
+static void IssueReportLunsCommand(
+ CPQFCHBA* cpqfcHBAdata,
+ TachFCHDR_GCMND* fchs);
+
+
+// (see scsi_error.c comments on kernel task creation)
+
+void cpqfcTSWorkerThread( void *host)
+{
+ struct Scsi_Host *HostAdapter = (struct Scsi_Host*)host;
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+#ifdef PCI_KERNEL_TRACE
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+#endif
+ struct fs_struct *fs;
+ DECLARE_MUTEX_LOCKED(fcQueReady);
+ DECLARE_MUTEX_LOCKED(fcTYOBcomplete);
+ DECLARE_MUTEX_LOCKED(TachFrozen);
+ DECLARE_MUTEX_LOCKED(BoardLock);
+
+ ENTER("WorkerThread");
+
+ lock_kernel();
+ /*
+ * If we were started as result of loading a module, close all of the
+ * user space pages. We don't need them, and if we didn't close them
+ * they would be locked into memory.
+ */
+ exit_mm(current);
+
+ current->session = 1;
+ current->pgrp = 1;
+
+ /* Become as one with the init task */
+
+ exit_fs(current); /* current->fs->count--; */
+ fs = init_task.fs;
+ // Some kernels compiled for SMP, while actually running
+ // on a uniproc machine, will return NULL for this call
+ if( !fs)
+ {
+ printk(" cpqfcTS FATAL: fs is NULL! Is this an SMP kernel on uniproc machine?\n ");
+ }
+
+ else
+ {
+ current->fs = fs;
+ atomic_inc(&fs->count);
+ }
+
+ siginitsetinv(¤t->blocked, SHUTDOWN_SIGS);
+
+
+ /*
+ * Set the name of this process.
+ */
+ sprintf(current->comm, "cpqfcTS_wt_%d", HostAdapter->host_no);
+
+ cpqfcHBAdata->fcQueReady = &fcQueReady; // primary wait point
+ cpqfcHBAdata->TYOBcomplete = &fcTYOBcomplete;
+ cpqfcHBAdata->TachFrozen = &TachFrozen;
+
+
+ cpqfcHBAdata->worker_thread = current;
+
+ unlock_kernel();
+
+ if( cpqfcHBAdata->notify_wt != NULL )
+ up( cpqfcHBAdata->notify_wt); // OK to continue
+
+ while(1)
+ {
+ unsigned long flags;
+
+ down_interruptible( &fcQueReady); // wait for something to do
+
+ if (signal_pending(current) )
+ break;
+
+ PCI_TRACE( 0x90)
+ // first, take the IO lock so the SCSI upper layers can't call
+ // into our _quecommand function (this also disables INTs)
+ spin_lock_irqsave( &io_request_lock, flags); // STOP _que function
+ PCI_TRACE( 0x90)
+
+ CPQ_SPINLOCK_HBA( cpqfcHBAdata)
+ // next, set this pointer to indicate to the _quecommand function
+ // that the board is in use, so it should que the command and
+ // immediately return (we don't actually require the semaphore function
+ // in this driver rev)
+
+ cpqfcHBAdata->BoardLock = &BoardLock;
+
+ PCI_TRACE( 0x90)
+
+ // release the IO lock (and re-enable interrupts)
+ spin_unlock_irqrestore( &io_request_lock, flags);
+
+ // disable OUR HBA interrupt (keep them off as much as possible
+ // during error recovery)
+ disable_irq( cpqfcHBAdata->HostAdapter->irq);
+
+ // OK, let's process the Fibre Channel Link Q and do the work
+ cpqfcTS_WorkTask( HostAdapter);
+
+ // hopefully, no more "work" to do;
+ // re-enable our INTs for "normal" completion processing
+ enable_irq( cpqfcHBAdata->HostAdapter->irq);
+
+
+ cpqfcHBAdata->BoardLock = NULL; // allow commands to be queued
+ CPQ_SPINUNLOCK_HBA( cpqfcHBAdata)
+
+
+ // Now, complete any Cmnd we Q'd up while BoardLock was held
+
+ CompleteBoardLockCmnd( cpqfcHBAdata);
+
+
+ }
+ // hopefully, the signal was for our module exit...
+ if( cpqfcHBAdata->notify_wt != NULL )
+ up( cpqfcHBAdata->notify_wt); // yep, we're outta here
+}
+
+
+// Freeze Tachyon routine.
+// If Tachyon is already frozen, return FALSE
+// If Tachyon is not frozen, call freeze function, return TRUE
+//
+static BOOLEAN FreezeTach( CPQFCHBA *cpqfcHBAdata)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ BOOLEAN FrozeTach = FALSE;
+ // It's possible that the chip is already frozen; if so,
+ // "Freezing" again will NOT! generate another Freeze
+ // Completion Message.
+
+ if( (fcChip->Registers.TYstatus.value & 0x70000) != 0x70000)
+ { // (need to freeze...)
+ fcChip->FreezeTachyon( fcChip, 2); // both ERQ and FCP assists
+
+ // 2. Get Tach freeze confirmation
+ // (synchronize SEST manipulation with Freeze Completion Message)
+ // we need INTs on so semaphore can be set.
+ enable_irq( cpqfcHBAdata->HostAdapter->irq); // only way to get Semaphore
+ down_interruptible( cpqfcHBAdata->TachFrozen); // wait for INT handler sem.
+ // can we TIMEOUT semaphore wait?? TBD
+ disable_irq( cpqfcHBAdata->HostAdapter->irq);
+
+ FrozeTach = TRUE;
+ } // (else, already frozen)
+
+ return FrozeTach;
+}
+
+
+
+
+// This is the kernel worker thread task, which processes FC
+// tasks which were queued by the Interrupt handler or by
+// other WorkTask functions.
+
+#define DBG 1
+//#undef DBG
+void cpqfcTS_WorkTask( struct Scsi_Host *HostAdapter)
+{
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG QconsumerNdx;
+ LONG ExchangeID;
+ ULONG ulStatus=0;
+ TachFCHDR_GCMND fchs;
+ PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ;
+
+ ENTER("WorkTask");
+
+ // copy current index to work on
+ QconsumerNdx = fcLQ->consumer;
+
+ PCI_TRACEO( fcLQ->Qitem[QconsumerNdx].Type, 0x90)
+
+
+ // NOTE: when this switch completes, we will "consume" the Que item
+// printk("Que type %Xh\n", fcLQ->Qitem[QconsumerNdx].Type);
+ switch( fcLQ->Qitem[QconsumerNdx].Type )
+ {
+ // incoming frame - link service (ACC, UNSOL REQ, etc.)
+ // or FCP-SCSI command
+ case SFQ_UNKNOWN:
+ AnalyzeIncomingFrame( cpqfcHBAdata, QconsumerNdx );
+
+ break;
+
+
+
+ case EXCHANGE_QUEUED: // an Exchange (i.e. FCP-SCSI) was previously
+ // Queued because the link was down. The
+ // heartbeat timer detected it and Queued it here.
+ // We attempt to start it again, and if
+ // successful we clear the EXCHANGE_Q flag.
+ // If the link doesn't come up, the Exchange
+ // will eventually time-out.
+
+ ExchangeID = (LONG) // x_ID copied from DPC timeout function
+ fcLQ->Qitem[QconsumerNdx].ulBuff[0];
+
+ // It's possible that a Q'd exchange could have already
+ // been started by other logic (e.g. ABTS process)
+ // Don't start if already started (Q'd flag clear)
+
+ if( Exchanges->fcExchange[ExchangeID].status & EXCHANGE_QUEUED )
+ {
+// printk(" *Start Q'd x_ID %Xh: type %Xh ",
+// ExchangeID, Exchanges->fcExchange[ExchangeID].type);
+
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID);
+ if( !ulStatus )
+ {
+// printk("success* ");
+ }
+ else
+ {
+#ifdef DBG
+
+ if( ulStatus == EXCHANGE_QUEUED)
+ printk("Queued* ");
+ else
+ printk("failed* ");
+
+#endif
+ }
+ }
+ break;
+
+
+ case LINKDOWN:
+ // (lots of things already done in INT handler) future here?
+ break;
+
+
+ case LINKACTIVE: // Tachyon set the Lup bit in FM status
+ // NOTE: some misbehaving FC ports (like Tach2.1)
+ // can re-LIP immediately after a LIP completes.
+
+ // if "initiator", need to verify LOGs with ports
+// printk("\n*LNKUP* ");
+
+ if( fcChip->Options.initiator )
+ SendLogins( cpqfcHBAdata, NULL ); // PLOGI or PDISC, based on fcPort data
+ // if SendLogins successfully completes, PortDiscDone
+ // will be set.
+
+
+ // If SendLogins was successful, then we expect to get incoming
+ // ACCepts or REJECTs, which are handled below.
+
+ break;
+
+ // LinkService and Fabric request/reply processing
+ case ELS_FDISC: // need to send Fabric Discovery (Login)
+ case ELS_FLOGI: // need to send Fabric Login
+ case ELS_SCR: // need to send State Change Registration
+ case FCS_NSR: // need to send Name Service Request
+ case ELS_PLOGI: // need to send PLOGI
+ case ELS_ACC: // send generic ACCept
+ case ELS_PLOGI_ACC: // need to send ELS ACCept frame to recv'd PLOGI
+ case ELS_PRLI_ACC: // need to send ELS ACCept frame to recv'd PRLI
+ case ELS_LOGO: // need to send ELS LOGO (logout)
+ case ELS_LOGO_ACC: // need to send ELS ACCept frame to recv'd PLOGI
+ case ELS_RJT: // ReJecT reply
+ case ELS_PRLI: // need to send ELS PRLI
+
+
+// printk(" *ELS %Xh* ", fcLQ->Qitem[QconsumerNdx].Type);
+ // if PortDiscDone is not set, it means the SendLogins routine
+ // failed to complete -- assume that LDn occured, so login frames
+ // are invalid
+ if( !cpqfcHBAdata->PortDiscDone) // cleared by LDn
+ {
+ printk("Discard Q'd ELS login frame\n");
+ break;
+ }
+
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ fcLQ->Qitem[QconsumerNdx].Type, // e.g. PLOGI
+ (TachFCHDR_GCMND*)
+ fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs
+ NULL, // no data (no scatter/gather list)
+ &ExchangeID );// fcController->fcExchanges index, -1 if failed
+
+ if( !ulStatus ) // Exchange setup?
+ {
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID );
+ if( !ulStatus )
+ {
+ // submitted to Tach's Outbound Que (ERQ PI incremented)
+ // waited for completion for ELS type (Login frames issued
+ // synchronously)
+ }
+ else
+ // check reason for Exchange not being started - we might
+ // want to Queue and start later, or fail with error
+ {
+
+ }
+ }
+
+ else // Xchange setup failed...
+ printk(" cpqfcTSBuildExchange failed: %Xh\n", ulStatus );
+
+ break;
+
+ case SCSI_REPORT_LUNS:
+ // pass the incoming frame (actually, it's a PRLI frame)
+ // so we can send REPORT_LUNS, in order to determine VSA/PDU
+ // FCP-SCSI Lun address mode
+ IssueReportLunsCommand( cpqfcHBAdata, (TachFCHDR_GCMND*)
+ fcLQ->Qitem[QconsumerNdx].ulBuff);
+
+ break;
+
+
+
+
+ case BLS_ABTS: // need to ABORT one or more exchanges
+ {
+ LONG x_ID = fcLQ->Qitem[QconsumerNdx].ulBuff[0];
+ BOOLEAN FrozeTach = FALSE;
+
+ if( x_ID > TACH_SEST_LEN ) // (in)sanity check
+ {
+// printk( " cpqfcTS ERROR! BOGUS x_ID %Xh", x_ID);
+ break;
+ }
+
+
+ if( Exchanges->fcExchange[ x_ID].Cmnd == NULL ) // should be RARE
+ {
+// printk(" ABTS %Xh Scsi Cmnd null! ", x_ID);
+
+ break; // nothing to abort!
+ }
+
+//#define ABTS_DBG
+#ifdef ABTS_DBG
+ printk("INV SEST[%X] ", x_ID);
+ if( Exchanges->fcExchange[x_ID].status & FC2_TIMEOUT)
+ {
+ printk("FC2TO");
+ }
+ if( Exchanges->fcExchange[x_ID].status & INITIATOR_ABORT)
+ {
+ printk("IA");
+ }
+ if( Exchanges->fcExchange[x_ID].status & PORTID_CHANGED)
+ {
+ printk("PORTID");
+ }
+ if( Exchanges->fcExchange[x_ID].status & DEVICE_REMOVED)
+ {
+ printk("DEVRM");
+ }
+ if( Exchanges->fcExchange[x_ID].status & LINKFAIL_TX)
+ {
+ printk("LKF");
+ }
+ if( Exchanges->fcExchange[x_ID].status & FRAME_TO)
+ {
+ printk("FRMTO");
+ }
+ if( Exchanges->fcExchange[x_ID].status & ABORTSEQ_NOTIFY)
+ {
+ printk("ABSQ");
+ }
+ if( Exchanges->fcExchange[x_ID].status & SFQ_FRAME)
+ {
+ printk("SFQFR");
+ }
+
+ if( Exchanges->fcExchange[ x_ID].type == 0x2000)
+ printk(" WR");
+ else if( Exchanges->fcExchange[ x_ID].type == 0x3000)
+ printk(" RD");
+ else if( Exchanges->fcExchange[ x_ID].type == 0x10)
+ printk(" ABTS");
+ else
+ printk(" %Xh", Exchanges->fcExchange[ x_ID].type);
+
+ if( !(Exchanges->fcExchange[x_ID].status & INITIATOR_ABORT))
+ {
+ printk(" Cmd %p, ",
+ Exchanges->fcExchange[ x_ID].Cmnd);
+
+ printk(" brd/chn/trg/lun %d/%d/%d/%d port_id %06X\n",
+ cpqfcHBAdata->HBAnum,
+ Exchanges->fcExchange[ x_ID].Cmnd->channel,
+ Exchanges->fcExchange[ x_ID].Cmnd->target,
+ Exchanges->fcExchange[ x_ID].Cmnd->lun,
+ Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF);
+ }
+ else // assume that Cmnd ptr is invalid on _abort()
+ {
+ printk(" Cmd ptr invalid\n");
+ }
+
+#endif
+
+
+ // Steps to ABORT a SEST exchange:
+ // 1. Freeze TL SCSI assists & ERQ (everything)
+ // 2. Receive FROZEN inbound CM (must succeed!)
+ // 3. Invalidate x_ID SEST entry
+ // 4. Resume TL SCSI assists & ERQ (everything)
+ // 5. Build/start on exchange - change "type" to BLS_ABTS,
+ // timeout to X sec (RA_TOV from PLDA is actually 0)
+ // 6. Set Exchange Q'd status if ABTS cannot be started,
+ // or simply complete Exchange in "Terminate" condition
+
+ PCI_TRACEO( x_ID, 0xB4)
+
+ // 1 & 2 . Freeze Tach & get confirmation of freeze
+ FrozeTach = FreezeTach( cpqfcHBAdata);
+
+ // 3. OK, Tachyon is frozen, so we can invalidate SEST exchange.
+ // FC2_TIMEOUT means we are originating the abort, while
+ // TARGET_ABORT means we are ACCepting an abort.
+ // LINKFAIL_TX, ABORTSEQ_NOFITY, INV_ENTRY or FRAME_TO are
+ // all from Tachyon:
+ // Exchange was corrupted by LDn or other FC physical failure
+ // INITIATOR_ABORT means the upper layer driver/application
+ // requested the abort.
+
+
+
+ // clear bit 31 (VALid), to invalidate & take control from TL
+ fcChip->SEST->u[ x_ID].IWE.Hdr_Len &= 0x7FFFFFFF;
+
+
+ // examine and Tach's "Linked List" for IWEs that
+ // received (nearly) simultaneous transfer ready (XRDY)
+ // repair linked list if necessary (TBD!)
+ // (If we ignore the "Linked List", we will time out
+ // WRITE commands where we received the FCP-SCSI XFRDY
+ // frame (because Tachyon didn't processes it). Linked List
+ // management should be done as an optimization.
+
+// readl( fcChip->Registers.ReMapMemBase+TL_MEM_SEST_LINKED_LIST ));
+
+
+
+
+ // 4. Resume all Tachlite functions (for other open Exchanges)
+ // as quickly as possible to allow other exchanges to other ports
+ // to resume. Freezing Tachyon may cause cascading errors, because
+ // any received SEST frame cannot be processed by the SEST.
+ // Don't "unfreeze" unless Link is operational
+ if( FrozeTach ) // did we just freeze it (above)?
+ fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists
+
+
+ PCI_TRACEO( x_ID, 0xB4)
+
+ // Note there is no confirmation that the chip is "unfrozen". Also,
+ // if the Link is down when unfreeze is called, it has no effect.
+ // Chip will unfreeze when the Link is back up.
+
+ // 5. Now send out Abort commands if possible
+ // Some Aborts can't be "sent" (Port_id changed or gone);
+ // if the device is gone, there is no port_id to send the ABTS to.
+
+ if( !(Exchanges->fcExchange[ x_ID].status & PORTID_CHANGED)
+ &&
+ !(Exchanges->fcExchange[ x_ID].status & DEVICE_REMOVED) )
+ {
+ Exchanges->fcExchange[ x_ID].type = BLS_ABTS;
+ fchs.s_id = Exchanges->fcExchange[ x_ID].fchs.d_id;
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ BLS_ABTS,
+ &fchs, // (uses only s_id)
+ NULL, // (no scatter/gather list for ABTS)
+ &x_ID );// ABTS on this Exchange ID
+
+ if( !ulStatus ) // Exchange setup build OK?
+ {
+
+ // ABTS may be needed because an Exchange was corrupted
+ // by a Link disruption. If the Link is UP, we can
+ // presume that this ABTS can start immediately; otherwise,
+ // set Que'd status so the Login functions
+ // can restart it when the FC physical Link is restored
+ if( ((fcChip->Registers.FMstatus.value &0xF0) &0x80)) // loop init?
+ {
+// printk(" *set Q status x_ID %Xh on LDn* ", x_ID);
+ Exchanges->fcExchange[ x_ID].status |= EXCHANGE_QUEUED;
+ }
+
+ else // what FC device (port_id) does the Cmd belong to?
+ {
+ PFC_LOGGEDIN_PORT pLoggedInPort =
+ Exchanges->fcExchange[ x_ID].pLoggedInPort;
+
+ // if Port is logged in, we might start the abort.
+
+ if( (pLoggedInPort != NULL)
+ &&
+ (pLoggedInPort->prli == TRUE) )
+ {
+ // it's possible that an Exchange has already been Queued
+ // to start after Login completes. Check and don't
+ // start it (again) here if Q'd status set
+// printk(" ABTS xchg %Xh ", x_ID);
+ if( Exchanges->fcExchange[x_ID].status & EXCHANGE_QUEUED)
+ {
+// printk("already Q'd ");
+ }
+ else
+ {
+// printk("starting ");
+
+ fcChip->fcStats.FC2aborted++;
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, x_ID );
+ if( !ulStatus )
+ {
+ // OK
+ // submitted to Tach's Outbound Que (ERQ PI incremented)
+ }
+ else
+ {
+/* printk("ABTS exchange start failed -status %Xh, x_ID %Xh ",
+ ulStatus, x_ID);
+*/
+ }
+ }
+ }
+ else
+ {
+/* printk(" ABTS NOT starting xchg %Xh, %p ",
+ x_ID, pLoggedInPort);
+ if( pLoggedInPort )
+ printk("prli %d ", pLoggedInPort->prli);
+*/
+ }
+ }
+ }
+ else // what the #@!
+ { // how do we fail to build an Exchange for ABTS??
+ printk("ABTS exchange build failed -status %Xh, x_ID %Xh\n",
+ ulStatus, x_ID);
+ }
+ }
+ else // abort without ABTS -- just complete exchange/Cmnd to Linux
+ {
+// printk(" *Terminating x_ID %Xh on %Xh* ",
+// x_ID, Exchanges->fcExchange[x_ID].status);
+ cpqfcTSCompleteExchange( fcChip, x_ID);
+
+
+ }
+ } // end of ABTS case
+ break;
+
+
+
+ case BLS_ABTS_ACC: // need to ACCept one ABTS
+ // (NOTE! this code not updated for Linux yet..)
+
+
+ printk(" *ABTS_ACC* ");
+ // 1. Freeze TL
+
+ fcChip->FreezeTachyon( fcChip, 2); // both ERQ and FCP assists
+
+ memcpy( // copy the incoming ABTS frame
+ &fchs,
+ fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs
+ sizeof( fchs));
+
+ // 3. OK, Tachyon is frozen so we can invalidate SEST entry
+ // (if necessary)
+ // Status FC2_TIMEOUT means we are originating the abort, while
+ // TARGET_ABORT means we are ACCepting an abort
+
+ ExchangeID = fchs.ox_rx_id & 0x7FFF; // RX_ID for exchange
+// printk("ABTS ACC for Target ExchangeID %Xh\n", ExchangeID);
+
+
+ // sanity check on received ExchangeID
+ if( Exchanges->fcExchange[ ExchangeID].status == TARGET_ABORT )
+ {
+ // clear bit 31 (VALid), to invalidate & take control from TL
+// printk("Invalidating SEST exchange %Xh\n", ExchangeID);
+ fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len &= 0x7FFFFFFF;
+ }
+
+
+ // 4. Resume all Tachlite functions (for other open Exchanges)
+ // as quickly as possible to allow other exchanges to other ports
+ // to resume. Freezing Tachyon for too long may royally screw
+ // up everything!
+ fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists
+
+ // Note there is no confirmation that the chip is "unfrozen". Also,
+ // if the Link is down when unfreeze is called, it has no effect.
+ // Chip will unfreeze when the Link is back up.
+
+ // 5. Now send out Abort ACC reply for this exchange
+ Exchanges->fcExchange[ ExchangeID].type = BLS_ABTS_ACC;
+
+ fchs.s_id = Exchanges->fcExchange[ ExchangeID].fchs.d_id;
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ BLS_ABTS_ACC,
+ &fchs,
+ NULL, // no data (no scatter/gather list)
+ &ExchangeID );// fcController->fcExchanges index, -1 if failed
+
+ if( !ulStatus ) // Exchange setup?
+ {
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID );
+ if( !ulStatus )
+ {
+ // submitted to Tach's Outbound Que (ERQ PI incremented)
+ // waited for completion for ELS type (Login frames issued
+ // synchronously)
+ }
+ else
+ // check reason for Exchange not being started - we might
+ // want to Queue and start later, or fail with error
+ {
+
+ }
+ }
+ break;
+
+
+ case BLS_ABTS_RJT: // need to ReJecT one ABTS; reject implies the
+ // exchange doesn't exist in the TARGET context.
+ // ExchangeID has to come from LinkService space.
+
+ printk(" *ABTS_RJT* ");
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ BLS_ABTS_RJT,
+ (TachFCHDR_GCMND*)
+ fcLQ->Qitem[QconsumerNdx].ulBuff, // incoming fchs
+ NULL, // no data (no scatter/gather list)
+ &ExchangeID );// fcController->fcExchanges index, -1 if failed
+
+ if( !ulStatus ) // Exchange setup OK?
+ {
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID );
+ // If it fails, we aren't required to retry.
+ }
+ if( ulStatus )
+ {
+ printk("Failed to send BLS_RJT for ABTS, X_ID %Xh\n", ExchangeID);
+ }
+ else
+ {
+ printk("Sent BLS_RJT for ABTS, X_ID %Xh\n", ExchangeID);
+
+ }
+
+ break;
+
+
+
+ default:
+ break;
+ } // end switch
+//doNothing:
+ // done with this item - now set the NEXT index
+
+ if( QconsumerNdx+1 >= FC_LINKQ_DEPTH ) // rollover test
+ {
+ fcLQ->consumer = 0;
+ }
+ else
+ {
+ fcLQ->consumer++;
+ }
+
+ PCI_TRACEO( fcLQ->Qitem[QconsumerNdx].Type, 0x94)
+
+ LEAVE("WorkTask");
+ return;
+}
+
+
+
+
+// When Tachyon reports link down, bad al_pa, or Link Service (e.g. Login)
+// commands come in, post to the LinkQ so that action can be taken outside the
+// interrupt handler.
+// This circular Q works like Tachyon's que - the producer points to the next
+// (unused) entry. Called by Interrupt handler, WorkerThread, Timer
+// sputlinkq
+void cpqfcTSPutLinkQue( CPQFCHBA *cpqfcHBAdata,
+ int Type,
+ void *QueContent)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+// FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ;
+ ULONG ndx;
+
+ ENTER("cpqfcTSPutLinkQ");
+
+ ndx = fcLQ->producer;
+
+ ndx += 1; // test for Que full
+
+
+
+ if( ndx >= FC_LINKQ_DEPTH ) // rollover test
+ ndx = 0;
+
+ if( ndx == fcLQ->consumer ) // QUE full test
+ {
+ // QUE was full! lost LK command (fatal to logic)
+ fcChip->fcStats.lnkQueFull++;
+
+ printk("*LinkQ Full!*");
+ TriggerHBA( fcChip->Registers.ReMapMemBase, 1);
+/*
+ {
+ int i;
+ printk("LinkQ PI %d, CI %d\n", fcLQ->producer,
+ fcLQ->consumer);
+
+ for( i=0; i< FC_LINKQ_DEPTH; )
+ {
+ printk(" [%d]%Xh ", i, fcLQ->Qitem[i].Type);
+ if( (++i %8) == 0) printk("\n");
+ }
+
+ }
+*/
+ printk( "cpqfcTS: WARNING!! PutLinkQue - FULL!\n"); // we're hung
+ }
+ else // QUE next element
+ {
+ // Prevent certain multiple (back-to-back) requests.
+ // This is important in that we don't want to issue multiple
+ // ABTS for the same Exchange, or do multiple FM inits, etc.
+ // We can never be sure of the timing of events reported to
+ // us by Tach's IMQ, which can depend on system/bus speeds,
+ // FC physical link circumstances, etc.
+
+ if( (fcLQ->producer != fcLQ->consumer)
+ &&
+ (Type == FMINIT) )
+ {
+ LONG lastNdx; // compute previous producer index
+ if( fcLQ->producer)
+ lastNdx = fcLQ->producer- 1;
+ else
+ lastNdx = FC_LINKQ_DEPTH-1;
+
+
+ if( fcLQ->Qitem[lastNdx].Type == FMINIT)
+ {
+// printk(" *skip FMINIT Q post* ");
+// goto DoneWithPutQ;
+ }
+
+ }
+
+ // OK, add the Q'd item...
+
+ fcLQ->Qitem[fcLQ->producer].Type = Type;
+
+ memcpy(
+ fcLQ->Qitem[fcLQ->producer].ulBuff,
+ QueContent,
+ sizeof(fcLQ->Qitem[fcLQ->producer].ulBuff));
+
+ fcLQ->producer = ndx; // increment Que producer
+
+ // set semaphore to wake up Kernel (worker) thread
+ //
+ up( cpqfcHBAdata->fcQueReady );
+ }
+
+//DoneWithPutQ:
+
+ LEAVE("cpqfcTSPutLinkQ");
+}
+
+
+
+
+// reset device ext FC link Q
+void cpqfcTSLinkQReset( CPQFCHBA *cpqfcHBAdata)
+
+{
+ PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ;
+ fcLQ->producer = 0;
+ fcLQ->consumer = 0;
+
+}
+
+
+
+
+
+// When Tachyon gets an unassisted FCP-SCSI frame, post here so
+// an arbitrary context thread (e.g. IOCTL loopback test function)
+// can process it.
+
+// (NOTE: Not revised for Linux)
+// This Q works like Tachyon's que - the producer points to the next
+// (unused) entry.
+void cpqfcTSPutScsiQue( CPQFCHBA *cpqfcHBAdata,
+ int Type,
+ void *QueContent)
+{
+// CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+// PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+
+// ULONG ndx;
+
+// ULONG *pExchangeID;
+// LONG ExchangeID;
+
+/*
+ KeAcquireSpinLockAtDpcLevel( &pDevExt->fcScsiQueLock);
+ ndx = pDevExt->fcScsiQue.producer + 1; // test for Que full
+
+ if( ndx >= FC_SCSIQ_DEPTH ) // rollover test
+ ndx = 0;
+
+ if( ndx == pDevExt->fcScsiQue.consumer ) // QUE full test
+ {
+ // QUE was full! lost LK command (fatal to logic)
+ fcChip->fcStats.ScsiQueFull++;
+#ifdef DBG
+ printk( "fcPutScsiQue - FULL!\n");
+#endif
+
+ }
+ else // QUE next element
+ {
+ pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].Type = Type;
+
+ if( Type == FCP_RSP )
+ {
+ // this TL inbound message type means that a TL SEST exchange has
+ // copied an FCP response frame into a buffer pointed to by the SEST
+ // entry. That buffer is allocated in the SEST structure at ->RspHDR.
+ // Copy the RspHDR for use by the Que handler.
+ pExchangeID = (ULONG *)QueContent;
+
+ memcpy(
+ pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff,
+ &fcChip->SEST->RspHDR[ *pExchangeID ],
+ sizeof(pDevExt->fcScsiQue.Qitem[0].ulBuff)); // (any element for size)
+
+ }
+ else
+ {
+ memcpy(
+ pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff,
+ QueContent,
+ sizeof(pDevExt->fcScsiQue.Qitem[pDevExt->fcScsiQue.producer].ulBuff));
+ }
+
+ pDevExt->fcScsiQue.producer = ndx; // increment Que
+
+
+ KeSetEvent( &pDevExt->TYIBscsi, // signal any waiting thread
+ 0, // no priority boost
+ FALSE ); // no waiting later for this event
+ }
+ KeReleaseSpinLockFromDpcLevel( &pDevExt->fcScsiQueLock);
+*/
+}
+
+
+
+
+
+
+
+static void ProcessELS_Request( CPQFCHBA*,TachFCHDR_GCMND*);
+
+static void ProcessELS_Reply( CPQFCHBA*,TachFCHDR_GCMND*);
+
+static void ProcessFCS_Reply( CPQFCHBA*,TachFCHDR_GCMND*);
+
+void cpqfcTSImplicitLogout( CPQFCHBA* cpqfcHBAdata,
+ PFC_LOGGEDIN_PORT pFcPort)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+
+ if( pFcPort->port_id != 0xFFFC01 ) // don't care about Fabric
+ {
+ fcChip->fcStats.logouts++;
+ printk("cpqfcTS: Implicit logout of WWN %08X%08X, port_id %06X\n",
+ (ULONG)pFcPort->u.liWWN,
+ (ULONG)(pFcPort->u.liWWN >>32),
+ pFcPort->port_id);
+
+ // Terminate I/O with this (Linux) Scsi target
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pFcPort->ScsiNexus,
+ DEVICE_REMOVED);
+ }
+
+ // Do an "implicit logout" - we can't really Logout the device
+ // (i.e. with LOGOut Request) because of port_id confusion
+ // (i.e. the Other port has no port_id).
+ // A new login for that WWN will have to re-write port_id (0 invalid)
+ pFcPort->port_id = 0; // invalid!
+ pFcPort->pdisc = FALSE;
+ pFcPort->prli = FALSE;
+ pFcPort->plogi = FALSE;
+ pFcPort->flogi = FALSE;
+ pFcPort->LOGO_timer = 0;
+ pFcPort->device_blocked = TRUE; // block Scsi Requests
+}
+
+
+// On FC-AL, there is a chance that a previously known device can
+// be quietly removed (e.g. with non-managed hub),
+// while a NEW device (with different WWN) took the same alpa or
+// even 24-bit port_id. This chance is unlikely but we must always
+// check for it.
+static void TestDuplicatePortId( CPQFCHBA* cpqfcHBAdata,
+ PFC_LOGGEDIN_PORT pLoggedInPort)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ // set "other port" at beginning of fcPorts list
+ PFC_LOGGEDIN_PORT pOtherPortWithPortId = fcChip->fcPorts.pNextPort;
+ while( pOtherPortWithPortId )
+ {
+ if( (pOtherPortWithPortId->port_id ==
+ pLoggedInPort->port_id)
+ &&
+ (pOtherPortWithPortId != pLoggedInPort) )
+ {
+ // trouble! (Implicitly) Log the other guy out
+ printk(" *port_id %Xh is duplicated!* ",
+ pOtherPortWithPortId->port_id);
+ cpqfcTSImplicitLogout( cpqfcHBAdata, pOtherPortWithPortId);
+ }
+ pOtherPortWithPortId = pOtherPortWithPortId->pNextPort;
+ }
+}
+
+
+
+
+
+
+// Dynamic Memory Allocation for newly discovered FC Ports.
+// For simplicity, maintain fcPorts structs for ALL
+// for discovered devices, including those we never do I/O with
+// (e.g. Fabric addresses)
+
+static PFC_LOGGEDIN_PORT CreateFcPort(
+ CPQFCHBA* cpqfcHBAdata,
+ PFC_LOGGEDIN_PORT pLastLoggedInPort,
+ TachFCHDR_GCMND* fchs,
+ LOGIN_PAYLOAD* plogi)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ PFC_LOGGEDIN_PORT pNextLoggedInPort = NULL;
+ int i;
+
+
+ printk("cpqfcTS: New FC port %06Xh WWN: ", fchs->s_id);
+ for( i=3; i>=0; i--) // copy the LOGIN port's WWN
+ printk("%02X", plogi->port_name[i]);
+ for( i=7; i>3; i--) // copy the LOGIN port's WWN
+ printk("%02X", plogi->port_name[i]);
+
+
+ // allocate mem for new port
+ // (these are small and rare allocations...)
+ pNextLoggedInPort = kmalloc( sizeof( FC_LOGGEDIN_PORT), GFP_ATOMIC );
+
+
+ // allocation succeeded? Fill out NEW PORT
+ if( pNextLoggedInPort )
+ {
+ // clear out any garbage (sometimes exists)
+ memset( pNextLoggedInPort, 0, sizeof( FC_LOGGEDIN_PORT));
+
+
+ // If we login to a Fabric, we don't want to treat it
+ // as a SCSI device...
+ if( (fchs->s_id & 0xFFF000) != 0xFFF000)
+ {
+ int i;
+
+ // create a unique "virtual" SCSI Nexus (for now, just a
+ // new target ID) -- we will update channel/target on REPORT_LUNS
+ // special case for very first SCSI target...
+ if( cpqfcHBAdata->HostAdapter->max_id == 0)
+ {
+ pNextLoggedInPort->ScsiNexus.target = 0;
+ fcChip->fcPorts.ScsiNexus.target = -1; // don't use "stub"
+ }
+ else
+ {
+ pNextLoggedInPort->ScsiNexus.target =
+ cpqfcHBAdata->HostAdapter->max_id;
+ }
+
+ // initialize the lun[] Nexus struct for lun masking
+ for( i=0; i< CPQFCTS_MAX_LUN; i++)
+ pNextLoggedInPort->ScsiNexus.lun[i] = 0xFF; // init to NOT USED
+
+ pNextLoggedInPort->ScsiNexus.channel = 0; // cpqfcTS has 1 FC port
+
+ printk(" SCSI Chan/Trgt %d/%d",
+ pNextLoggedInPort->ScsiNexus.channel,
+ pNextLoggedInPort->ScsiNexus.target);
+
+ // tell Scsi layers about the new target...
+ cpqfcHBAdata->HostAdapter->max_id++;
+// printk("HostAdapter->max_id = %d\n",
+// cpqfcHBAdata->HostAdapter->max_id);
+ }
+ else
+ {
+ // device is NOT SCSI (in case of Fabric)
+ pNextLoggedInPort->ScsiNexus.target = -1; // invalid
+ }
+
+ // create forward link to new port
+ pLastLoggedInPort->pNextPort = pNextLoggedInPort;
+ printk("\n");
+
+ }
+ return pNextLoggedInPort; // NULL on allocation failure
+} // end NEW PORT (WWN) logic
+
+
+
+// For certain cases, we want to terminate exchanges without
+// sending ABTS to the device. Examples include when an FC
+// device changed it's port_id after Loop re-init, or when
+// the device sent us a logout. In the case of changed port_id,
+// we want to complete the command and return SOFT_ERROR to
+// force a re-try. In the case of LOGOut, we might return
+// BAD_TARGET if the device is really gone.
+// Since we must ensure that Tachyon is not operating on the
+// exchange, we have to freeze the chip
+// sterminateex
+void cpqfcTSTerminateExchange(
+ CPQFCHBA* cpqfcHBAdata, SCSI_NEXUS *ScsiNexus, int TerminateStatus)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG x_ID;
+
+ if( ScsiNexus )
+ {
+// printk("TerminateExchange: ScsiNexus chan/target %d/%d\n",
+// ScsiNexus->channel, ScsiNexus->target);
+
+ }
+
+ for( x_ID = 0; x_ID < TACH_SEST_LEN; x_ID++)
+ {
+ if( Exchanges->fcExchange[x_ID].type ) // in use?
+ {
+ if( ScsiNexus == NULL ) // our HBA changed - term. all
+ {
+ Exchanges->fcExchange[x_ID].status = TerminateStatus;
+ cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &x_ID );
+ }
+ else
+ {
+ // If a device, according to WWN, has been removed, it's
+ // port_id may be used by another working device, so we
+ // have to terminate by SCSI target, NOT port_id.
+ if( Exchanges->fcExchange[x_ID].Cmnd) // Cmnd in progress?
+ {
+ if( (Exchanges->fcExchange[x_ID].Cmnd->target == ScsiNexus->target)
+ &&
+ (Exchanges->fcExchange[x_ID].Cmnd->channel == ScsiNexus->channel))
+ {
+ Exchanges->fcExchange[x_ID].status = TerminateStatus;
+ cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &x_ID ); // timed-out
+ }
+ }
+
+ // (in case we ever need it...)
+ // all SEST structures have a remote node ID at SEST DWORD 2
+ // if( (fcChip->SEST->u[ x_ID ].TWE.Remote_Node_ID >> 8)
+ // == port_id)
+ }
+ }
+ }
+}
+
+
+static void ProcessELS_Request(
+ CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+// FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+// ULONG ox_id = (fchs->ox_rx_id >>16);
+ PFC_LOGGEDIN_PORT pLoggedInPort=NULL, pLastLoggedInPort;
+ BOOLEAN NeedReject = FALSE;
+ ULONG ls_reject_code = 0; // default don'n know??
+
+
+ // Check the incoming frame for a supported ELS type
+ switch( fchs->pl[0] & 0xFFFF)
+ {
+ case 0x0050: // PDISC?
+
+ // Payload for PLOGI and PDISC is identical (request & reply)
+ if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) // valid payload?
+ {
+ LOGIN_PAYLOAD logi; // FC-PH Port Login
+
+ // PDISC payload OK. If critical login fields
+ // (e.g. WWN) matches last login for this port_id,
+ // we may resume any prior exchanges
+ // with the other port
+
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi));
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ 0, // don't search linked list for port_id
+ &logi.port_name[0], // search linked list for WWN
+ &pLastLoggedInPort); // must return non-NULL; when a port_id
+ // is not found, this pointer marks the
+ // end of the singly linked list
+
+ if( pLoggedInPort != NULL) // WWN found (prior login OK)
+ {
+
+ if( (fchs->s_id & 0xFFFFFF) == pLoggedInPort->port_id)
+ {
+ // Yes. We were expecting PDISC?
+ if( pLoggedInPort->pdisc )
+ {
+ // Yes; set fields accordingly. (PDISC, not Originator)
+ SetLoginFields( pLoggedInPort, fchs, TRUE, FALSE);
+
+ // send 'ACC' reply
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_PLOGI_ACC, // (PDISC same as PLOGI ACC)
+ fchs );
+
+ // OK to resume I/O...
+ }
+ else
+ {
+ printk("Not expecting PDISC (pdisc=FALSE)\n");
+ NeedReject = TRUE;
+ // set reject reason code
+ ls_reject_code =
+ LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR);
+ }
+ }
+ else
+ {
+ if( pLoggedInPort->port_id != 0)
+ {
+ printk("PDISC PortID change: old %Xh, new %Xh\n",
+ pLoggedInPort->port_id, fchs->s_id &0xFFFFFF);
+ }
+ NeedReject = TRUE;
+ // set reject reason code
+ ls_reject_code =
+ LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR);
+
+ }
+ }
+ else
+ {
+ printk("PDISC Request from unknown WWN\n");
+ NeedReject = TRUE;
+
+ // set reject reason code
+ ls_reject_code =
+ LS_RJT_REASON( LOGICAL_ERROR, INVALID_PORT_NAME);
+ }
+
+ }
+ else // Payload unacceptable
+ {
+ printk("payload unacceptable\n");
+ NeedReject = TRUE; // reject code already set
+
+ }
+
+ if( NeedReject)
+ {
+ ULONG port_id;
+ // The PDISC failed. Set login struct flags accordingly,
+ // terminate any I/O to this port, and Q a PLOGI
+ if( pLoggedInPort )
+ {
+ pLoggedInPort->pdisc = FALSE;
+ pLoggedInPort->prli = FALSE;
+ pLoggedInPort->plogi = FALSE;
+
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus, PORTID_CHANGED);
+ port_id = pLoggedInPort->port_id;
+ }
+ else
+ {
+ port_id = fchs->s_id &0xFFFFFF;
+ }
+ fchs->reserved = ls_reject_code; // borrow this (unused) field
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_RJT, fchs );
+ }
+
+ break;
+
+
+
+ case 0x0003: // PLOGI?
+
+ // Payload for PLOGI and PDISC is identical (request & reply)
+ if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) ) // valid payload?
+ {
+ LOGIN_PAYLOAD logi; // FC-PH Port Login
+ BOOLEAN NeedReject = FALSE;
+
+ // PDISC payload OK. If critical login fields
+ // (e.g. WWN) matches last login for this port_id,
+ // we may resume any prior exchanges
+ // with the other port
+
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi));
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ 0, // don't search linked list for port_id
+ &logi.port_name[0], // search linked list for WWN
+ &pLastLoggedInPort); // must return non-NULL; when a port_id
+ // is not found, this pointer marks the
+ // end of the singly linked list
+
+ if( pLoggedInPort == NULL) // WWN not found -New Port
+ {
+ pLoggedInPort = CreateFcPort(
+ cpqfcHBAdata,
+ pLastLoggedInPort,
+ fchs,
+ &logi);
+ if( pLoggedInPort == NULL )
+ {
+ printk(" cpqfcTS: New port allocation failed - lost FC device!\n");
+ // Now Q a LOGOut Request, since we won't be talking to that device
+
+ NeedReject = TRUE;
+
+ // set reject reason code
+ ls_reject_code =
+ LS_RJT_REASON( LOGICAL_ERROR, NO_LOGIN_RESOURCES);
+
+ }
+ }
+ if( !NeedReject )
+ {
+
+ // OK - we have valid fcPort ptr; set fields accordingly.
+ // (not PDISC, not Originator)
+ SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE);
+
+ // send 'ACC' reply
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_PLOGI_ACC, // (PDISC same as PLOGI ACC)
+ fchs );
+ }
+ }
+ else // Payload unacceptable
+ {
+ printk("payload unacceptable\n");
+ NeedReject = TRUE; // reject code already set
+ }
+
+ if( NeedReject)
+ {
+ // The PDISC failed. Set login struct flags accordingly,
+ // terminate any I/O to this port, and Q a PLOGI
+ pLoggedInPort->pdisc = FALSE;
+ pLoggedInPort->prli = FALSE;
+ pLoggedInPort->plogi = FALSE;
+
+ fchs->reserved = ls_reject_code; // borrow this (unused) field
+
+ // send 'RJT' reply
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_RJT, fchs );
+ }
+
+ // terminate any exchanges with this device...
+ if( pLoggedInPort )
+ {
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus, PORTID_CHANGED);
+ }
+ break;
+
+
+
+ case 0x1020: // PRLI?
+ {
+ BOOLEAN NeedReject = TRUE;
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ (fchs->s_id & 0xFFFFFF), // search linked list for port_id
+ NULL, // DON'T search linked list for WWN
+ NULL); // don't care
+
+ if( pLoggedInPort == NULL )
+ {
+ // huh?
+ printk(" Unexpected PRLI Request -not logged in!\n");
+
+ // set reject reason code
+ ls_reject_code = LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR);
+
+ // Q a LOGOut here?
+ }
+ else
+ {
+ // verify the PRLI ACC payload
+ if( !verify_PRLI( fchs, &ls_reject_code) )
+ {
+ // PRLI Reply is acceptable; were we expecting it?
+ if( pLoggedInPort->plogi )
+ {
+ // yes, we expected the PRLI ACC (not PDISC; not Originator)
+ SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE);
+
+ // Q an ACCept Reply
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_PRLI_ACC,
+ fchs );
+
+ NeedReject = FALSE;
+ }
+ else
+ {
+ // huh?
+ printk(" (unexpected) PRLI REQEST with plogi FALSE\n");
+
+ // set reject reason code
+ ls_reject_code = LS_RJT_REASON( PROTOCOL_ERROR, INITIATOR_CTL_ERROR);
+
+ // Q a LOGOut here?
+
+ }
+ }
+ else
+ {
+ printk(" PRLI REQUEST payload failed verify\n");
+ // (reject code set by "verify")
+
+ // Q a LOGOut here?
+ }
+ }
+
+ if( NeedReject )
+ {
+ // Q a ReJecT Reply with reason code
+ fchs->reserved = ls_reject_code;
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_RJT, // Q Type
+ fchs );
+ }
+ }
+ break;
+
+
+
+
+ case 0x0005: // LOGOut?
+ {
+ // was this LOGOUT because we sent a ELS_PDISC to an FC device
+ // with changed (or new) port_id, or does the port refuse
+ // to communicate to us?
+ // We maintain a logout counter - if we get 3 consecutive LOGOuts,
+ // give up!
+ LOGOUT_PAYLOAD logo;
+ BOOLEAN GiveUpOnDevice = FALSE;
+ ULONG ls_reject_code = 0;
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logo, sizeof(logo));
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ 0, // don't search linked list for port_id
+ &logo.port_name[0], // search linked list for WWN
+ NULL); // don't care about end of list
+
+ if( pLoggedInPort ) // found the device?
+ {
+ // Q an ACC reply
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_LOGO_ACC, // Q Type
+ fchs ); // device to respond to
+
+ // set login struct fields (LOGO_counter increment)
+ SetLoginFields( pLoggedInPort, fchs, FALSE, FALSE);
+
+ // are we an Initiator?
+ if( fcChip->Options.initiator)
+ {
+ // we're an Initiator, so check if we should
+ // try (another?) login
+
+ // Fabrics routinely log out from us after
+ // getting device info - don't try to log them
+ // back in.
+ if( (fchs->s_id & 0xFFF000) == 0xFFF000 )
+ {
+ ; // do nothing
+ }
+ else if( pLoggedInPort->LOGO_counter <= 3)
+ {
+ // try (another) login (PLOGI request)
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_PLOGI, // Q Type
+ fchs );
+
+ // Terminate I/O with "retry" potential
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus,
+ PORTID_CHANGED);
+ }
+ else
+ {
+ printk(" Got 3 LOGOuts - terminating comm. with port_id %Xh\n",
+ fchs->s_id &&0xFFFFFF);
+ GiveUpOnDevice = TRUE;
+ }
+ }
+ else
+ {
+ GiveUpOnDevice = TRUE;
+ }
+
+
+ if( GiveUpOnDevice == TRUE )
+ {
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus,
+ DEVICE_REMOVED);
+ }
+ }
+ else // we don't know this WWN!
+ {
+ // Q a ReJecT Reply with reason code
+ fchs->reserved = ls_reject_code;
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_RJT, // Q Type
+ fchs );
+ }
+ }
+ break;
+
+
+
+
+ // FABRIC only case
+ case 0x0461: // ELS RSCN (Registered State Change Notification)?
+ {
+ int Ports;
+ int i;
+ __u32 Buff;
+ // Typically, one or more devices have been added to or dropped
+ // from the Fabric.
+ // The format of this frame is defined in FC-FLA (Rev 2.7, Aug 1997)
+ // The first 32-bit word has a 2-byte Payload Length, which
+ // includes the 4 bytes of the first word. Consequently,
+ // this PL len must never be less than 4, must be a multiple of 4,
+ // and has a specified max value 256.
+ // (Endianess!)
+ Ports = ((fchs->pl[0] >>24) - 4) / 4;
+ Ports = Ports > 63 ? 63 : Ports;
+
+ printk(" RSCN ports: %d\n", Ports);
+ if( Ports <= 0 ) // huh?
+ {
+ // ReJecT the command
+ fchs->reserved = LS_RJT_REASON( UNABLE_TO_PERFORM, 0);
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_RJT, // Q Type
+ fchs );
+
+ break;
+ }
+ else // Accept the command
+ {
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_ACC, // Q Type
+ fchs );
+ }
+
+ // Check the "address format" to determine action.
+ // We have 3 cases:
+ // 0 = Port Address; 24-bit address of affected device
+ // 1 = Area Address; MS 16 bits valid
+ // 2 = Domain Address; MS 8 bits valid
+ for( i=0; i<Ports; i++)
+ {
+ BigEndianSwap( (UCHAR*)&fchs->pl[i+1],(UCHAR*)&Buff, 4);
+ switch( Buff & 0xFF000000)
+ {
+
+ case 0: // Port Address?
+
+ case 0x01000000: // Area Domain?
+ case 0x02000000: // Domain Address
+ // For example, "port_id" 0x201300
+ // OK, let's try a Name Service Request (Query)
+ fchs->s_id = 0xFFFFFC; // Name Server Address
+ cpqfcTSPutLinkQue( cpqfcHBAdata, FCS_NSR, fchs);
+
+ break;
+
+
+ default: // huh? new value on version change?
+ break;
+ }
+ }
+ }
+ break;
+
+
+
+
+ default: // don't support this request (yet)
+ // set reject reason code
+ fchs->reserved = LS_RJT_REASON( UNABLE_TO_PERFORM,
+ REQUEST_NOT_SUPPORTED);
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_RJT, // Q Type
+ fchs );
+ break;
+ }
+}
+
+
+static void ProcessELS_Reply(
+ CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG ox_id = (fchs->ox_rx_id >>16);
+ ULONG ls_reject_code;
+ PFC_LOGGEDIN_PORT pLoggedInPort, pLastLoggedInPort;
+
+ // If this is a valid reply, then we MUST have sent a request.
+ // Verify that we can find a valid request OX_ID corresponding to
+ // this reply
+
+
+ if( Exchanges->fcExchange[(fchs->ox_rx_id >>16)].type == 0)
+ {
+ printk(" *Discarding ACC/RJT frame, xID %04X/%04X* ",
+ ox_id, fchs->ox_rx_id & 0xffff);
+ goto Quit; // exit this routine
+ }
+
+
+ // Is the reply a RJT (reject)?
+ if( (fchs->pl[0] & 0xFFFFL) == 0x01) // Reject reply?
+ {
+// ****** REJECT REPLY ********
+ switch( Exchanges->fcExchange[ox_id].type )
+ {
+
+ case ELS_FDISC: // we sent out Fabric Discovery
+ case ELS_FLOGI: // we sent out FLOGI
+
+ printk("RJT received on Fabric Login from %Xh, reason %Xh\n",
+ fchs->s_id, fchs->pl[1]);
+
+ break;
+
+ default:
+ break;
+ }
+
+ goto Done;
+ }
+
+ // OK, we have an ACCept...
+ // What's the ACC type? (according to what we sent)
+ switch( Exchanges->fcExchange[ox_id].type )
+ {
+
+ case ELS_PLOGI: // we sent out PLOGI
+ if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) )
+ {
+ LOGIN_PAYLOAD logi; // FC-PH Port Login
+
+ // login ACC payload acceptable; search for WWN in our list
+ // of fcPorts
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi));
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ 0, // don't search linked list for port_id
+ &logi.port_name[0], // search linked list for WWN
+ &pLastLoggedInPort); // must return non-NULL; when a port_id
+ // is not found, this pointer marks the
+ // end of the singly linked list
+
+ if( pLoggedInPort == NULL) // WWN not found - new port
+ {
+
+ pLoggedInPort = CreateFcPort(
+ cpqfcHBAdata,
+ pLastLoggedInPort,
+ fchs,
+ &logi);
+
+ if( pLoggedInPort == NULL )
+ {
+ printk(" cpqfcTS: New port allocation failed - lost FC device!\n");
+ // Now Q a LOGOut Request, since we won't be talking to that device
+
+ goto Done; // exit with error! dropped login frame
+ }
+ }
+ else // WWN was already known. Ensure that any open
+ // exchanges for this WWN are terminated.
+ // NOTE: It's possible that a device can change its
+ // 24-bit port_id after a Link init or Fabric change
+ // (e.g. LIP or Fabric RSCN). In that case, the old
+ // 24-bit port_id may be duplicated, or no longer exist.
+ {
+
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus, PORTID_CHANGED);
+ }
+
+ // We have an fcPort struct - set fields accordingly
+ // not PDISC, originator
+ SetLoginFields( pLoggedInPort, fchs, FALSE, TRUE);
+
+ // We just set a "port_id"; is it duplicated?
+ TestDuplicatePortId( cpqfcHBAdata, pLoggedInPort);
+
+ // For Fabric operation, we issued PLOGI to 0xFFFFFC
+ // so we can send SCR (State Change Registration)
+ // Check for this special case...
+ if( fchs->s_id == 0xFFFFFC )
+ {
+ // PLOGI ACC was a Fabric response... issue SCR
+ fchs->s_id = 0xFFFFFD; // address for SCR
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_SCR, fchs);
+ }
+
+ else
+ {
+ // Now we need a PRLI to enable FCP-SCSI operation
+ // set flags and Q up a ELS_PRLI
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PRLI, fchs);
+ }
+ }
+ else
+ {
+ // login payload unacceptable - reason in ls_reject_code
+ // Q up a Logout Request
+ printk("Login Payload unacceptable\n");
+
+ }
+ break;
+
+
+ // PDISC logic very similar to PLOGI, except we never want
+ // to allocate mem for "new" port, and we set flags differently
+ // (might combine later with PLOGI logic for efficiency)
+ case ELS_PDISC: // we sent out PDISC
+ if( !verify_PLOGI( fcChip, fchs, &ls_reject_code) )
+ {
+ LOGIN_PAYLOAD logi; // FC-PH Port Login
+ BOOLEAN NeedLogin = FALSE;
+
+ // login payload acceptable; search for WWN in our list
+ // of (previously seen) fcPorts
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi));
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ 0, // don't search linked list for port_id
+ &logi.port_name[0], // search linked list for WWN
+ &pLastLoggedInPort); // must return non-NULL; when a port_id
+ // is not found, this pointer marks the
+ // end of the singly linked list
+
+ if( pLoggedInPort != NULL) // WWN found?
+ {
+ // WWN has same port_id as last login? (Of course, a properly
+ // working FC device should NEVER ACCept a PDISC if it's
+ // port_id changed, but check just in case...)
+ if( (fchs->s_id & 0xFFFFFF) == pLoggedInPort->port_id)
+ {
+ // Yes. We were expecting PDISC?
+ if( pLoggedInPort->pdisc )
+ {
+ int i;
+
+
+ // PDISC expected -- set fields. (PDISC, Originator)
+ SetLoginFields( pLoggedInPort, fchs, TRUE, TRUE);
+
+ // We are ready to resume FCP-SCSI to this device...
+ // Do we need to start anything that was Queued?
+
+ for( i=0; i< TACH_SEST_LEN; i++)
+ {
+ // see if any exchange for this PDISC'd port was queued
+ if( ((fchs->s_id &0xFFFFFF) ==
+ (Exchanges->fcExchange[i].fchs.d_id & 0xFFFFFF))
+ &&
+ (Exchanges->fcExchange[i].status & EXCHANGE_QUEUED))
+ {
+ fchs->reserved = i; // copy ExchangeID
+// printk(" *Q x_ID %Xh after PDISC* ",i);
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata, EXCHANGE_QUEUED, fchs );
+ }
+ }
+
+ // Complete commands Q'd while we were waiting for Login
+
+ UnblockScsiDevice( cpqfcHBAdata->HostAdapter, pLoggedInPort);
+ }
+ else
+ {
+ printk("Not expecting PDISC (pdisc=FALSE)\n");
+ NeedLogin = TRUE;
+ }
+ }
+ else
+ {
+ printk("PDISC PortID change: old %Xh, new %Xh\n",
+ pLoggedInPort->port_id, fchs->s_id &0xFFFFFF);
+ NeedLogin = TRUE;
+
+ }
+ }
+ else
+ {
+ printk("PDISC ACC from unknown WWN\n");
+ NeedLogin = TRUE;
+ }
+
+ if( NeedLogin)
+ {
+
+ // The PDISC failed. Set login struct flags accordingly,
+ // terminate any I/O to this port, and Q a PLOGI
+ if( pLoggedInPort ) // FC device previously known?
+ {
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ ELS_LOGO, // Q Type
+ fchs ); // has port_id to send to
+
+ // There are a variety of error scenarios which can result
+ // in PDISC failure, so as a catchall, add the check for
+ // duplicate port_id.
+ TestDuplicatePortId( cpqfcHBAdata, pLoggedInPort);
+
+// TriggerHBA( fcChip->Registers.ReMapMemBase, 0);
+ pLoggedInPort->pdisc = FALSE;
+ pLoggedInPort->prli = FALSE;
+ pLoggedInPort->plogi = FALSE;
+
+ cpqfcTSTerminateExchange( cpqfcHBAdata,
+ &pLoggedInPort->ScsiNexus, PORTID_CHANGED);
+ }
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PLOGI, fchs );
+ }
+ }
+ else
+ {
+ // login payload unacceptable - reason in ls_reject_code
+ // Q up a Logout Request
+ printk("ERROR: Login Payload unacceptable!\n");
+
+ }
+
+ break;
+
+
+
+ case ELS_PRLI: // we sent out PRLI
+
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search Scsi Nexus
+ (fchs->s_id & 0xFFFFFF), // search linked list for port_id
+ NULL, // DON'T search linked list for WWN
+ NULL); // don't care
+
+ if( pLoggedInPort == NULL )
+ {
+ // huh?
+ printk(" Unexpected PRLI ACCept frame!\n");
+
+ // Q a LOGOut here?
+
+ goto Done;
+ }
+
+ // verify the PRLI ACC payload
+ if( !verify_PRLI( fchs, &ls_reject_code) )
+ {
+ // PRLI Reply is acceptable; were we expecting it?
+ if( pLoggedInPort->plogi )
+ {
+ // yes, we expected the PRLI ACC (not PDISC; Originator)
+ SetLoginFields( pLoggedInPort, fchs, FALSE, TRUE);
+
+ // OK, let's send a REPORT_LUNS command to determine
+ // whether VSA or PDA FCP-LUN addressing is used.
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata, SCSI_REPORT_LUNS, fchs );
+
+ // It's possible that a device we were talking to changed
+ // port_id, and has logged back in. This function ensures
+ // that I/O will resume.
+ UnblockScsiDevice( cpqfcHBAdata->HostAdapter, pLoggedInPort);
+
+ }
+ else
+ {
+ // huh?
+ printk(" (unexpected) PRLI ACCept with plogi FALSE\n");
+
+ // Q a LOGOut here?
+ goto Done;
+ }
+ }
+ else
+ {
+ printk(" PRLI ACCept payload failed verify\n");
+
+ // Q a LOGOut here?
+ }
+
+ break;
+
+ case ELS_FLOGI: // we sent out FLOGI (Fabric Login)
+
+ // update the upper 16 bits of our port_id in Tachyon
+ // the switch adds those upper 16 bits when responding
+ // to us (i.e. we are the destination_id)
+ fcChip->Registers.my_al_pa = (fchs->d_id & 0xFFFFFF);
+ writel( fcChip->Registers.my_al_pa,
+ fcChip->Registers.ReMapMemBase + TL_MEM_TACH_My_ID);
+
+ // now send out a PLOGI to the well known port_id 0xFFFFFC
+ fchs->s_id = 0xFFFFFC;
+ cpqfcTSPutLinkQue( cpqfcHBAdata, ELS_PLOGI, fchs);
+
+ break;
+
+
+ case ELS_FDISC: // we sent out FDISC (Fabric Discovery (Login))
+
+ printk( " ELS_FDISC success ");
+ break;
+
+
+ case ELS_SCR: // we sent out State Change Registration
+ // now we can issue Name Service Request to find any
+ // Fabric-connected devices we might want to login to.
+
+
+ fchs->s_id = 0xFFFFFC; // Name Server Address
+ cpqfcTSPutLinkQue( cpqfcHBAdata, FCS_NSR, fchs);
+
+
+ break;
+
+
+ default:
+ printk(" *Discarding unknown ACC frame, xID %04X/%04X* ",
+ ox_id, fchs->ox_rx_id & 0xffff);
+ break;
+ }
+
+
+Done:
+ // Regardless of whether the Reply is valid or not, the
+ // the exchange is done - complete
+ cpqfcTSCompleteExchange( fcChip, (fchs->ox_rx_id >>16)); // complete
+
+Quit:
+ return;
+}
+
+
+
+
+
+
+// **************** Fibre Channel Services **************
+// This is where we process the Directory (Name) Service Reply
+// to know which devices are on the Fabric
+
+static void ProcessFCS_Reply(
+ CPQFCHBA* cpqfcHBAdata, TachFCHDR_GCMND* fchs)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG ox_id = (fchs->ox_rx_id >>16);
+// ULONG ls_reject_code;
+// PFC_LOGGEDIN_PORT pLoggedInPort, pLastLoggedInPort;
+
+ // If this is a valid reply, then we MUST have sent a request.
+ // Verify that we can find a valid request OX_ID corresponding to
+ // this reply
+
+ if( Exchanges->fcExchange[(fchs->ox_rx_id >>16)].type == 0)
+ {
+ printk(" *Discarding Reply frame, xID %04X/%04X* ",
+ ox_id, fchs->ox_rx_id & 0xffff);
+ goto Quit; // exit this routine
+ }
+
+
+ // OK, we were expecting it. Now check to see if it's a
+ // "Name Service" Reply, and if so force a re-validation of
+ // Fabric device logins (i.e. Start the login timeout and
+ // send PDISC or PLOGI)
+ // (Endianess Byte Swap?)
+ if( fchs->pl[1] == 0x02FC ) // Name Service
+ {
+ // got a new (or NULL) list of Fabric attach devices...
+ // Invalidate current logins
+
+ PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts;
+ while( pLoggedInPort ) // for all ports which are expecting
+ // PDISC after the next LIP, set the
+ // logoutTimer
+ {
+
+ if( (pLoggedInPort->port_id & 0xFFFF00) // Fabric device?
+ &&
+ (pLoggedInPort->port_id != 0xFFFFFC) ) // NOT the F_Port
+ {
+ pLoggedInPort->LOGO_timer = 6; // what's the Fabric timeout??
+ // suspend any I/O in progress until
+ // PDISC received...
+ pLoggedInPort->prli = FALSE; // block FCP-SCSI commands
+ }
+
+ pLoggedInPort = pLoggedInPort->pNextPort;
+ }
+
+ if( fchs->pl[2] == 0x0280) // ACCept?
+ {
+ // Send PLOGI or PDISC to these Fabric devices
+ SendLogins( cpqfcHBAdata, &fchs->pl[4] );
+ }
+
+
+ // As of this writing, the only reason to reject is because NO
+ // devices are left on the Fabric. We already started
+ // "logged out" timers; if the device(s) don't come
+ // back, we'll do the implicit logout in the heart beat
+ // timer routine
+ else // ReJecT
+ {
+ // this just means no Fabric device is visible at this instant
+ }
+ }
+
+ // Regardless of whether the Reply is valid or not, the
+ // the exchange is done - complete
+ cpqfcTSCompleteExchange( fcChip, (fchs->ox_rx_id >>16)); // complete
+
+Quit:
+ return;
+}
+
+
+
+
+
+
+
+static void AnalyzeIncomingFrame(
+ CPQFCHBA *cpqfcHBAdata,
+ ULONG QNdx )
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ PFC_LINK_QUE fcLQ = cpqfcHBAdata->fcLQ;
+ TachFCHDR_GCMND* fchs =
+ (TachFCHDR_GCMND*)fcLQ->Qitem[QNdx].ulBuff;
+// ULONG ls_reject_code; // reason for rejecting login
+ LONG ExchangeID;
+// FC_LOGGEDIN_PORT *pLoggedInPort;
+ BOOLEAN AbortAccept;
+
+ ENTER("AnalyzeIncomingFrame");
+
+
+
+ switch( fcLQ->Qitem[QNdx].Type) // FCP or Unknown
+ {
+
+ case SFQ_UNKNOWN: // unknown frame (e.g. LIP position frame, NOP, etc.)
+
+
+ // ********* FC-4 Device Data/ Fibre Channel Service *************
+ if( ((fchs->d_id &0xF0000000) == 0) // R_CTL (upper nibble) 0x0?
+ &&
+ (fchs->f_ctl & 0x20000000) ) // TYPE 20h is Fibre Channel Service
+ {
+
+ // ************** FCS Reply **********************
+
+ if( (fchs->d_id & 0xff000000L) == 0x03000000L) // (31:23 R_CTL)
+ {
+ ProcessFCS_Reply( cpqfcHBAdata, fchs );
+
+ } // end of FCS logic
+
+ }
+
+
+ // *********** Extended Link Service **************
+
+ else if( fchs->d_id & 0x20000000 // R_CTL 0x2?
+ &&
+ (fchs->f_ctl & 0x01000000) ) // TYPE = 1
+ {
+
+ // these frames are either a response to
+ // something we sent (0x23) or "unsolicited"
+ // frames (0x22).
+
+
+ // **************Extended Link REPLY **********************
+ // R_CTL Solicited Control Reply
+
+ if( (fchs->d_id & 0xff000000L) == 0x23000000L) // (31:23 R_CTL)
+ {
+
+ ProcessELS_Reply( cpqfcHBAdata, fchs );
+
+ } // end of "R_CTL Solicited Control Reply"
+
+
+
+
+ // **************Extended Link REQUEST **********************
+ // (unsolicited commands from another port or task...)
+
+ // R_CTL Ext Link REQUEST
+ else if( (fchs->d_id & 0xff000000L) == 0x22000000L &&
+ (fchs->ox_rx_id != 0xFFFFFFFFL) ) // (ignore LIP frame)
+ {
+
+
+
+ ProcessELS_Request( cpqfcHBAdata, fchs );
+
+ }
+
+
+
+ // ************** LILP **********************
+ else if( (fchs->d_id & 0xff000000L) == 0x22000000L &&
+ (fchs->ox_rx_id == 0xFFFFFFFFL)) // (e.g., LIP frames)
+
+ {
+ // SANMark specifies that when available, we must use
+ // the LILP frame to determine which ALPAs to send Port Discovery
+ // to...
+
+ if( fchs->pl[0] == 0x0711L) // ELS_PLOGI?
+ {
+// UCHAR *ptr = (UCHAR*)&fchs->pl[1];
+// printk(" %d ALPAs found\n", *ptr);
+ memcpy( fcChip->LILPmap, &fchs->pl[1], 32*4); // 32 DWORDs
+ fcChip->Options.LILPin = 1; // our LILPmap is valid!
+ // now post to make Port Discovery happen...
+ cpqfcTSPutLinkQue( cpqfcHBAdata, LINKACTIVE, fchs);
+ }
+ }
+ }
+
+
+ // ***************** BASIC LINK SERVICE *****************
+
+ else if( fchs->d_id & 0x80000000 // R_CTL:
+ && // Basic Link Service Request
+ !(fchs->f_ctl & 0xFF000000) ) // type=0 for BLS
+ {
+
+ // Check for ABTS (Abort Sequence)
+ if( (fchs->d_id & 0x8F000000) == 0x81000000)
+ {
+ // look for OX_ID, S_ID pair that matches in our
+ // fcExchanges table; if found, reply with ACCept and complete
+ // the exchange
+
+ // Per PLDA, an ABTS is sent by an initiator; therefore
+ // assume that if we have an exhange open to the port who
+ // sent ABTS, it will be the d_id of what we sent.
+ for( ExchangeID = 0, AbortAccept=FALSE;
+ ExchangeID < TACH_SEST_LEN; ExchangeID++)
+ {
+ // Valid "target" exchange 24-bit port_id matches?
+ // NOTE: For the case of handling Intiator AND Target
+ // functions on the same chip, we can have TWO Exchanges
+ // with the same OX_ID -- OX_ID/FFFF for the CMND, and
+ // OX_ID/RX_ID for the XRDY or DATA frame(s). Ideally,
+ // we would like to support ABTS from Initiators or Targets,
+ // but it's not clear that can be supported on Tachyon for
+ // all cases (requires more investigation).
+
+ if( (Exchanges->fcExchange[ ExchangeID].type == SCSI_TWE ||
+ Exchanges->fcExchange[ ExchangeID].type == SCSI_TRE)
+ &&
+ ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) ==
+ (fchs->s_id & 0xFFFFFF)) )
+ {
+
+ // target xchnge port_id matches -- how about OX_ID?
+ if( (Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id &0xFFFF0000)
+ == (fchs->ox_rx_id & 0xFFFF0000) )
+ // yes! post ACCept response; will be completed by fcStart
+ {
+ Exchanges->fcExchange[ ExchangeID].status = TARGET_ABORT;
+
+ // copy (add) rx_id field for simplified ACCept reply
+ fchs->ox_rx_id =
+ Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id;
+
+ cpqfcTSPutLinkQue( cpqfcHBAdata,
+ BLS_ABTS_ACC, // Q Type
+ fchs ); // void QueContent
+ AbortAccept = TRUE;
+ printk("ACCepting ABTS for x_ID %8.8Xh, SEST pair %8.8Xh\n",
+ fchs->ox_rx_id, Exchanges->fcExchange[ ExchangeID].fchs.ox_rx_id);
+ break; // ABTS can affect only ONE exchange -exit loop
+ }
+ }
+ } // end of FOR loop
+ if( !AbortAccept ) // can't ACCept ABTS - send Reject
+ {
+ printk("ReJecTing: can't find ExchangeID %8.8Xh for ABTS command\n",
+ fchs->ox_rx_id);
+ if( Exchanges->fcExchange[ ExchangeID].type
+ &&
+ !(fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len
+ & 0x80000000))
+ {
+ cpqfcTSCompleteExchange( fcChip, ExchangeID);
+ }
+ else
+ {
+ printk("Unexpected ABTS ReJecT! SEST[%X] Dword 0: %Xh\n",
+ ExchangeID, fcChip->SEST->u[ ExchangeID].IWE.Hdr_Len);
+ }
+ }
+ }
+
+ // Check for BLS {ABTS? (Abort Sequence)} ACCept
+ else if( (fchs->d_id & 0x8F000000) == 0x84000000)
+ {
+ // target has responded with ACC for our ABTS;
+ // complete the indicated exchange with ABORTED status
+ // Make no checks for correct RX_ID, since
+ // all we need to conform ABTS ACC is the OX_ID.
+ // Verify that the d_id matches!
+
+ ExchangeID = (fchs->ox_rx_id >> 16) & 0x7FFF; // x_id from ACC
+// printk("ABTS ACC x_ID 0x%04X 0x%04X, status %Xh\n",
+// fchs->ox_rx_id >> 16, fchs->ox_rx_id & 0xffff,
+// Exchanges->fcExchange[ExchangeID].status);
+
+
+
+ if( ExchangeID < TACH_SEST_LEN ) // x_ID makes sense
+ {
+ // Does "target" exchange 24-bit port_id match?
+ // (See "NOTE" above for handling Intiator AND Target in
+ // the same device driver)
+ // First, if this is a target response, then we originated
+ // (initiated) it with BLS_ABTS:
+
+ if( (Exchanges->fcExchange[ ExchangeID].type == BLS_ABTS)
+
+ &&
+ // Second, does the source of this ACC match the destination
+ // of who we originally sent it to?
+ ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) ==
+ (fchs->s_id & 0xFFFFFF)) )
+ {
+ cpqfcTSCompleteExchange( fcChip, ExchangeID );
+ }
+ }
+ }
+ // Check for BLS {ABTS? (Abort Sequence)} ReJecT
+ else if( (fchs->d_id & 0x8F000000) == 0x85000000)
+ {
+ // target has responded with RJT for our ABTS;
+ // complete the indicated exchange with ABORTED status
+ // Make no checks for correct RX_ID, since
+ // all we need to conform ABTS ACC is the OX_ID.
+ // Verify that the d_id matches!
+
+ ExchangeID = (fchs->ox_rx_id >> 16) & 0x7FFF; // x_id from ACC
+// printk("BLS_ABTS RJT on Exchange 0x%04X 0x%04X\n",
+// fchs->ox_rx_id >> 16, fchs->ox_rx_id & 0xffff);
+
+ if( ExchangeID < TACH_SEST_LEN ) // x_ID makes sense
+ {
+ // Does "target" exchange 24-bit port_id match?
+ // (See "NOTE" above for handling Intiator AND Target in
+ // the same device driver)
+ // First, if this is a target response, then we originated
+ // (initiated) it with BLS_ABTS:
+
+ if( (Exchanges->fcExchange[ ExchangeID].type == BLS_ABTS)
+
+ &&
+ // Second, does the source of this ACC match the destination
+ // of who we originally sent it to?
+ ((Exchanges->fcExchange[ ExchangeID].fchs.d_id & 0xFFFFFF) ==
+ (fchs->s_id & 0xFFFFFF)) )
+ {
+ // YES! NOTE: There is a bug in CPQ's RA-4000 box
+ // where the "reason code" isn't returned in the payload
+ // For now, simply presume the reject is because the target
+ // already completed the exchange...
+
+// printk("complete x_ID %Xh on ABTS RJT\n", ExchangeID);
+ cpqfcTSCompleteExchange( fcChip, ExchangeID );
+ }
+ }
+ } // end of ABTS check
+ } // end of Basic Link Service Request
+ break;
+
+ default:
+ printk("AnalyzeIncomingFrame: unknown type: %Xh(%d)\n",
+ fcLQ->Qitem[QNdx].Type,
+ fcLQ->Qitem[QNdx].Type);
+ break;
+ }
+}
+
+
+// Function for Port Discovery necessary after every FC
+// initialization (e.g. LIP).
+// Also may be called if from Fabric Name Service logic.
+
+static void SendLogins( CPQFCHBA *cpqfcHBAdata, __u32 *FabricPortIds )
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG ulStatus=0;
+ TachFCHDR_GCMND fchs; // copy fields for transmission
+ int i;
+ ULONG loginType;
+ LONG ExchangeID;
+ PFC_LOGGEDIN_PORT pLoggedInPort;
+ __u32 PortIds[ number_of_al_pa];
+ int NumberOfPorts=0;
+
+ // We're going to presume (for now) that our limit of Fabric devices
+ // is the same as the number of alpa on a private loop (126 devices).
+ // (Of course this could be changed to support however many we have
+ // memory for).
+ memset( &PortIds[0], 0, sizeof(PortIds));
+
+ // First, check if this login is for our own Link Initialization
+ // (e.g. LIP on FC-AL), or if we have knowledge of Fabric devices
+ // from a switch. If we are logging into Fabric devices, we'll
+ // have a non-NULL FabricPortId pointer
+
+ if( FabricPortIds != NULL) // may need logins
+ {
+ int LastPort=FALSE;
+ i = 0;
+ while( !LastPort)
+ {
+ // port IDs From NSR payload; byte swap needed?
+ BigEndianSwap( (UCHAR*)FabricPortIds, (UCHAR*)&PortIds[i], 4);
+
+// printk("FPortId[%d] %Xh ", i, PortIds[i]);
+ if( PortIds[i] & 0x80000000)
+ LastPort = TRUE;
+
+ PortIds[i] &= 0xFFFFFF; // get 24-bit port_id
+ // some non-Fabric devices (like the Crossroads Fibre/Scsi bridge)
+ // erroneously use ALPA 0.
+ if( PortIds[i] ) // need non-zero port_id...
+ i++;
+
+ if( i >= number_of_al_pa ) // (in)sanity check
+ break;
+ FabricPortIds++; // next...
+ }
+
+ NumberOfPorts = i;
+// printk("NumberOf Fabric ports %d", NumberOfPorts);
+ }
+
+ else // need to send logins on our "local" link
+ {
+
+ // are we a loop port? If so, check for reception of LILP frame,
+ // and if received use it (SANMark requirement)
+ if( fcChip->Options.LILPin )
+ {
+ int j=0;
+ // sanity check on number of ALPAs from LILP frame...
+ // For format of LILP frame, see FC-AL specs or
+ // "Fibre Channel Bench Reference", J. Stai, 1995 (ISBN 1-879936-17-8)
+ // First byte is number of ALPAs
+ i = fcChip->LILPmap[0] >= (32*4) ? 32*4 : fcChip->LILPmap[0];
+ NumberOfPorts = i;
+// printk(" LILP alpa count %d ", i);
+ while( i > 0)
+ {
+ PortIds[j] = fcChip->LILPmap[1+ j];
+ j++; i--;
+ }
+ }
+ else // have to send login to everybody
+ {
+ int j=0;
+ i = number_of_al_pa;
+ NumberOfPorts = i;
+ while( i > 0)
+ {
+ PortIds[j] = valid_al_pa[j]; // all legal ALPAs
+ j++; i--;
+ }
+ }
+ }
+
+
+ // Now we have a copy of the port_ids (and how many)...
+ for( i = 0; i < NumberOfPorts; i++)
+ {
+ // 24-bit FC Port ID
+ fchs.s_id = PortIds[i]; // note: only 8-bits used for ALPA
+
+
+ // don't log into ourselves (Linux Scsi disk scan will stop on
+ // no TARGET support error on us, and quit trying for rest of devices)
+ if( (fchs.s_id & 0xFF ) == (fcChip->Registers.my_al_pa & 0xFF) )
+ continue;
+
+ // fabric login needed?
+ if( (fchs.s_id == 0) ||
+ (fcChip->Options.fabric == 1) )
+ {
+ fcChip->Options.flogi = 1; // fabric needs longer for login
+ // Do we need FLOGI or FDISC?
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search SCSI Nexus
+ 0xFFFFFC, // search linked list for Fabric port_id
+ NULL, // don't search WWN
+ NULL); // (don't care about end of list)
+
+ if( pLoggedInPort ) // If found, we have prior experience with
+ // this port -- check whether PDISC is needed
+ {
+ if( pLoggedInPort->flogi )
+ {
+ // does the switch support FDISC?? (FLOGI for now...)
+ loginType = ELS_FLOGI; // prior FLOGI still valid
+ }
+ else
+ loginType = ELS_FLOGI; // expired FLOGI
+ }
+ else // first FLOGI?
+ loginType = ELS_FLOGI;
+
+
+ fchs.s_id = 0xFFFFFE; // well known F_Port address
+
+ // Fabrics are not required to support FDISC, and
+ // it's not clear if that helps us anyway, since
+ // we'll want a Name Service Request to re-verify
+ // visible devices...
+ // Consequently, we always want our upper 16 bit
+ // port_id to be zero (we'll be rejected if we
+ // use our prior port_id if we've been plugged into
+ // a different switch port).
+ // Trick Tachyon to send to ALPA 0 (see TL/TS UG, pg 87)
+ // If our ALPA is 55h for instance, we want the FC frame
+ // s_id to be 0x000055, while Tach's my_al_pa register
+ // must be 0x000155, to force an OPN at ALPA 0
+ // (the Fabric port)
+ fcChip->Registers.my_al_pa &= 0xFF; // only use ALPA for FLOGI
+ writel( fcChip->Registers.my_al_pa | 0x0100,
+ fcChip->Registers.ReMapMemBase + TL_MEM_TACH_My_ID);
+ }
+
+ else // not FLOGI...
+ {
+ // should we send PLOGI or PDISC? Check if any prior port_id
+ // (e.g. alpa) completed a PLOGI/PRLI exchange by checking
+ // the pdisc flag.
+
+ pLoggedInPort = fcFindLoggedInPort(
+ fcChip,
+ NULL, // don't search SCSI Nexus
+ fchs.s_id, // search linked list for al_pa
+ NULL, // don't search WWN
+ NULL); // (don't care about end of list)
+
+
+
+ if( pLoggedInPort ) // If found, we have prior experience with
+ // this port -- check whether PDISC is needed
+ {
+ if( pLoggedInPort->pdisc )
+ {
+ loginType = ELS_PDISC; // prior PLOGI and PRLI maybe still valid
+
+ }
+ else
+ loginType = ELS_PLOGI; // prior knowledge, but can't use PDISC
+ }
+ else // never talked to this port_id before
+ loginType = ELS_PLOGI; // prior knowledge, but can't use PDISC
+ }
+
+
+
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ loginType, // e.g. PLOGI
+ &fchs, // no incoming frame (we are originator)
+ NULL, // no data (no scatter/gather list)
+ &ExchangeID );// fcController->fcExchanges index, -1 if failed
+
+ if( !ulStatus ) // Exchange setup OK?
+ {
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, ExchangeID );
+ if( !ulStatus )
+ {
+ // submitted to Tach's Outbound Que (ERQ PI incremented)
+ // waited for completion for ELS type (Login frames issued
+ // synchronously)
+
+ if( loginType == ELS_PDISC )
+ {
+ // now, we really shouldn't Revalidate SEST exchanges until
+ // we get an ACC reply from our target and verify that
+ // the target address/WWN is unchanged. However, when a fast
+ // target gets the PDISC, they can send SEST Exchange data
+ // before we even get around to processing the PDISC ACC.
+ // Consequently, we lose the I/O.
+ // To avoid this, go ahead and Revalidate when the PDISC goes
+ // out, anticipating that the ACC will be truly acceptable
+ // (this happens 99.9999....% of the time).
+ // If we revalidate a SEST write, and write data goes to a
+ // target that is NOT the one we originated the WRITE to,
+ // that target is required (FCP-SCSI specs, etc) to discard
+ // our WRITE data.
+
+ // Re-validate SEST entries (Tachyon hardware assists)
+ RevalidateSEST( cpqfcHBAdata->HostAdapter, pLoggedInPort);
+ //TriggerHBA( fcChip->Registers.ReMapMemBase, 1);
+ }
+ }
+ else // give up immediately on error
+ {
+#ifdef LOGIN_DBG
+ printk("SendLogins: fcStartExchange failed: %Xh\n", ulStatus );
+#endif
+ break;
+ }
+
+
+ if( fcChip->Registers.FMstatus.value & 0x080 ) // LDn during Port Disc.
+ {
+ ulStatus = LNKDWN_OSLS;
+#ifdef LOGIN_DBG
+ printk("SendLogins: PortDisc aborted (LDn) @alpa %Xh\n", fchs.s_id);
+#endif
+ break;
+ }
+ // Check the exchange for bad status (i.e. FrameTimeOut),
+ // and complete on bad status (most likely due to BAD_ALPA)
+ // on LDn, DPC function may already complete (ABORT) a started
+ // exchange, so check type first (type = 0 on complete).
+ if( Exchanges->fcExchange[ExchangeID].status )
+ {
+#ifdef LOGIN_DBG
+ printk("completing x_ID %X on status %Xh\n",
+ ExchangeID, Exchanges->fcExchange[ExchangeID].status);
+#endif
+ cpqfcTSCompleteExchange( fcChip, ExchangeID);
+ }
+ }
+ else // Xchange setup failed...
+ {
+#ifdef LOGIN_DBG
+ printk("FC: cpqfcTSBuildExchange failed: %Xh\n", ulStatus );
+#endif
+ break;
+ }
+ }
+ if( !ulStatus )
+ {
+ // set the event signifying that all ALPAs were sent out.
+#ifdef LOGIN_DBG
+ printk("SendLogins: PortDiscDone\n");
+#endif
+ cpqfcHBAdata->PortDiscDone = 1;
+
+
+ // TL/TS UG, pg. 184
+ // 0x0065 = 100ms for RT_TOV
+ // 0x01f5 = 500ms for ED_TOV
+ fcChip->Registers.ed_tov.value = 0x006501f5L;
+ writel( fcChip->Registers.ed_tov.value,
+ (fcChip->Registers.ed_tov.address));
+
+ // set the LP_TOV back to ED_TOV (i.e. 500 ms)
+ writel( 0x00000010, fcChip->Registers.ReMapMemBase +TL_MEM_FM_TIMEOUT2);
+ }
+ else
+ {
+ printk("SendLogins: failed at xchng %Xh, alpa %Xh, status %Xh\n",
+ ExchangeID, fchs.s_id, ulStatus);
+ }
+ LEAVE("SendLogins");
+
+}
+
+
+// for REPORT_LUNS documentation, see "In-Depth Exploration of Scsi",
+// D. Deming, 1994, pg 7-19 (ISBN 1-879936-08-9)
+static void ScsiReportLunsDone(Scsi_Cmnd *Cmnd)
+{
+ struct Scsi_Host *HostAdapter = Cmnd->host;
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ PFC_LOGGEDIN_PORT pLoggedInPort;
+ int LunListLen=0;
+ int i;
+ ULONG x_ID = 0xFFFFFFFF;
+ UCHAR *ucBuff = Cmnd->request_buffer;
+
+// printk("cpqfcTS: ReportLunsDone \n");
+ // first, we need to find the Exchange for this command,
+ // so we can find the fcPort struct to make the indicated
+ // changes.
+ for( i=0; i< TACH_SEST_LEN; i++)
+ {
+ if( Exchanges->fcExchange[i].type // exchange defined?
+ &&
+ (Exchanges->fcExchange[i].Cmnd == Cmnd) ) // matches?
+
+ {
+ x_ID = i; // found exchange!
+ break;
+ }
+ }
+ if( x_ID == 0xFFFFFFFF)
+ {
+// printk("cpqfcTS: ReportLuns failed - no FC Exchange\n");
+ goto Done; // Report Luns FC Exchange gone;
+ // exchange probably Terminated by Implicit logout
+ }
+
+
+ // search linked list for the port_id we sent INQUIRY to
+ pLoggedInPort = fcFindLoggedInPort( fcChip,
+ NULL, // DON'T search Scsi Nexus (we will set it)
+ Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF,
+ NULL, // DON'T search linked list for FC WWN
+ NULL); // DON'T care about end of list
+
+ if( !pLoggedInPort )
+ {
+// printk("cpqfcTS: ReportLuns failed - device gone\n");
+ goto Done; // error! can't find logged in Port
+ }
+ LunListLen = ucBuff[3];
+ LunListLen += ucBuff[2]>>8;
+
+ if( !LunListLen ) // failed
+ {
+ // generically speaking, a soft error means we should retry...
+ if( (Cmnd->result >> 16) == DID_SOFT_ERROR )
+ {
+ if( ((Cmnd->sense_buffer[2] & 0xF) == 0x6) &&
+ (Cmnd->sense_buffer[12] == 0x29) ) // Sense Code "reset"
+ {
+ TachFCHDR_GCMND *fchs = &Exchanges->fcExchange[ x_ID].fchs;
+ // did we fail because of "check condition, device reset?"
+ // e.g. the device was reset (i.e., at every power up)
+ // retry the Report Luns
+
+ // who are we sending it to?
+ // we know this because we have a copy of the command
+ // frame from the original Report Lun command -
+ // switch the d_id/s_id fields, because the Exchange Build
+ // context is "reply to source".
+
+ fchs->s_id = fchs->d_id; // (temporarily re-use the struct)
+ cpqfcTSPutLinkQue( cpqfcHBAdata, SCSI_REPORT_LUNS, fchs );
+ }
+ }
+ else // probably, the device doesn't support Report Luns
+ pLoggedInPort->ScsiNexus.VolumeSetAddressing = 0;
+ }
+ else // we have LUN info - check VSA mode
+ {
+ // for now, assume all LUNs will have same addr mode
+ // for VSA, payload byte 8 will be 0x40; otherwise, 0
+ pLoggedInPort->ScsiNexus.VolumeSetAddressing = ucBuff[8];
+
+ // Since we got a Report Luns answer, set lun masking flag
+ pLoggedInPort->ScsiNexus.LunMasking = 1;
+
+ if( LunListLen > 8*CPQFCTS_MAX_LUN) // We expect CPQFCTS_MAX_LUN max
+ LunListLen = 8*CPQFCTS_MAX_LUN;
+
+/*
+ printk("Device WWN %08X%08X Reports Luns @: ",
+ (ULONG)(pLoggedInPort->u.liWWN &0xFFFFFFFF),
+ (ULONG)(pLoggedInPort->u.liWWN>>32));
+
+ for( i=8; i<LunListLen+8; i+=8)
+ {
+ printk("%02X%02X ", ucBuff[i], ucBuff[i+1] );
+ }
+ printk("\n");
+*/
+
+ // Since the device was kind enough to tell us where the
+ // LUNs are, lets ensure they are contiguous for Linux's
+ // SCSI driver scan, which expects them to start at 0.
+ // Since Linux only supports 8 LUNs, only copy the first
+ // eight from the report luns command
+
+ // e.g., the Compaq RA4x00 f/w Rev 2.54 and above may report
+ // LUNs 4001, 4004, etc., because other LUNs are masked from
+ // this HBA (owned by someone else). We'll make those appear as
+ // LUN 0, 1... to Linux
+ {
+ int j;
+ int AppendLunList = 0;
+ // Walk through the LUN list. The 'j' array number is
+ // Linux's lun #, while the value of .lun[j] is the target's
+ // lun #.
+ // Once we build a LUN list, it's possible for a known device
+ // to go offline while volumes (LUNs) are added. Later,
+ // the device will do another PLOGI ... Report Luns command,
+ // and we must not alter the existing Linux Lun map.
+ // (This will be very rare).
+ for( j=0; j < CPQFCTS_MAX_LUN; j++)
+ {
+ if( pLoggedInPort->ScsiNexus.lun[j] != 0xFF )
+ {
+ AppendLunList = 1;
+ break;
+ }
+ }
+ if( AppendLunList )
+ {
+ int k;
+ int FreeLunIndex;
+// printk("cpqfcTS: AppendLunList\n");
+
+ // If we get a new Report Luns, we cannot change
+ // any existing LUN mapping! (Only additive entry)
+ // For all LUNs in ReportLun list
+ // if RL lun != ScsiNexus lun
+ // if RL lun present in ScsiNexus lun[], continue
+ // else find ScsiNexus lun[]==FF and add, continue
+
+ for( i=8, j=0; i<LunListLen+8 && j< CPQFCTS_MAX_LUN; i+=8, j++)
+ {
+ if( pLoggedInPort->ScsiNexus.lun[j] != ucBuff[i+1] )
+ {
+ // something changed from the last Report Luns
+ printk(" cpqfcTS: Report Lun change!\n");
+ for( k=0, FreeLunIndex=CPQFCTS_MAX_LUN;
+ k < CPQFCTS_MAX_LUN; k++)
+ {
+ if( pLoggedInPort->ScsiNexus.lun[k] == 0xFF)
+ {
+ FreeLunIndex = k;
+ break;
+ }
+ if( pLoggedInPort->ScsiNexus.lun[k] == ucBuff[i+1] )
+ break; // we already masked this lun
+ }
+ if( k >= CPQFCTS_MAX_LUN )
+ {
+ printk(" no room for new LUN %d\n", ucBuff[i+1]);
+ }
+ else if( k == FreeLunIndex ) // need to add LUN
+ {
+ pLoggedInPort->ScsiNexus.lun[k] = ucBuff[i+1];
+// printk("add [%d]->%02d\n", k, pLoggedInPort->ScsiNexus.lun[k]);
+
+ }
+ else
+ {
+ // lun already known
+ }
+ break;
+ }
+ }
+ // print out the new list...
+ for( j=0; j< CPQFCTS_MAX_LUN; j++)
+ {
+ if( pLoggedInPort->ScsiNexus.lun[j] == 0xFF)
+ break; // done
+// printk("[%d]->%02d ", j, pLoggedInPort->ScsiNexus.lun[j]);
+ }
+ }
+ else
+ {
+// printk("Linux SCSI LUNs[] -> Device LUNs: ");
+ // first time - this is easy
+ for( i=8, j=0; i<LunListLen+8 && j< CPQFCTS_MAX_LUN; i+=8, j++)
+ {
+ pLoggedInPort->ScsiNexus.lun[j] = ucBuff[i+1];
+// printk("[%d]->%02d ", j, pLoggedInPort->ScsiNexus.lun[j]);
+ }
+// printk("\n");
+ }
+ }
+ }
+
+Done:
+}
+
+// After successfully getting a "Process Login" (PRLI) from an
+// FC port, we want to Discover the LUNs so that we know the
+// addressing type (e.g., FCP-SCSI Volume Set Address, Peripheral
+// Unit Device), and whether SSP (Selective Storage Presentation or
+// Lun Masking) has made the LUN numbers non-zero based or
+// non-contiguous. To remain backward compatible with the SCSI-2
+// driver model, which expects a contiguous LUNs starting at 0,
+// will use the ReportLuns info to map from "device" to "Linux"
+// LUNs.
+static void IssueReportLunsCommand(
+ CPQFCHBA* cpqfcHBAdata,
+ TachFCHDR_GCMND* fchs)
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ PFC_LOGGEDIN_PORT pLoggedInPort;
+ Scsi_Cmnd *Cmnd;
+ LONG x_ID;
+ ULONG ulStatus;
+ UCHAR *ucBuff;
+
+
+ if( !cpqfcHBAdata->PortDiscDone) // cleared by LDn
+ {
+ printk("Discard Q'd ReportLun command\n");
+ goto Done;
+ }
+
+ // find the device (from port_id) we're talking to
+ pLoggedInPort = fcFindLoggedInPort( fcChip,
+ NULL, // DON'T search Scsi Nexus
+ fchs->s_id & 0xFFFFFF,
+ NULL, // DON'T search linked list for FC WWN
+ NULL); // DON'T care about end of list
+ if( pLoggedInPort ) // we'd BETTER find it!
+ {
+
+
+ if( !(pLoggedInPort->fcp_info & TARGET_FUNCTION) )
+ goto Done; // forget it - FC device not a "target"
+
+ // now use the port's Scsi Command buffer for the
+ // Report Luns Command
+
+ Cmnd = &pLoggedInPort->ScsiCmnd;
+ ucBuff = pLoggedInPort->ReportLunsPayload;
+
+ memset( Cmnd, 0, sizeof(Scsi_Cmnd));
+ memset( ucBuff, 0, REPORT_LUNS_PL);
+
+ Cmnd->scsi_done = ScsiReportLunsDone;
+ Cmnd->host = cpqfcHBAdata->HostAdapter;
+
+ Cmnd->request_buffer = pLoggedInPort->ReportLunsPayload;
+ Cmnd->request_bufflen = REPORT_LUNS_PL;
+
+ Cmnd->cmnd[0] = 0xA0;
+ Cmnd->cmnd[8] = REPORT_LUNS_PL >> 8;
+ Cmnd->cmnd[9] = (UCHAR)REPORT_LUNS_PL;
+ Cmnd->cmd_len = 12;
+
+ Cmnd->channel = pLoggedInPort->ScsiNexus.channel;
+ Cmnd->target = pLoggedInPort->ScsiNexus.target;
+
+
+ ulStatus = cpqfcTSBuildExchange(
+ cpqfcHBAdata,
+ SCSI_IRE,
+ fchs,
+ Cmnd, // buffer for Report Lun data
+ &x_ID );// fcController->fcExchanges index, -1 if failed
+
+ if( !ulStatus ) // Exchange setup?
+ {
+ ulStatus = cpqfcTSStartExchange( cpqfcHBAdata, x_ID );
+ if( !ulStatus )
+ {
+ // submitted to Tach's Outbound Que (ERQ PI incremented)
+ // waited for completion for ELS type (Login frames issued
+ // synchronously)
+ }
+ else
+ // check reason for Exchange not being started - we might
+ // want to Queue and start later, or fail with error
+ {
+
+ }
+ }
+
+ else // Xchange setup failed...
+ printk(" cpqfcTSBuildExchange failed: %Xh\n", ulStatus );
+ }
+ else // like, we just got a PRLI ACC, and now the port is gone?
+ {
+ printk(" can't send ReportLuns - no login for port_id %Xh\n",
+ fchs->s_id & 0xFFFFFF);
+ }
+
+
+
+Done:
+
+}
+
+
+
+
+
+
+
+static void CompleteBoardLockCmnd( CPQFCHBA *cpqfcHBAdata)
+{
+ int i;
+ for( i = CPQFCTS_REQ_QUEUE_LEN-1; i>= 0; i--)
+ {
+ if( cpqfcHBAdata->BoardLockCmnd[i] != NULL )
+ {
+ Scsi_Cmnd *Cmnd = cpqfcHBAdata->BoardLockCmnd[i];
+ cpqfcHBAdata->BoardLockCmnd[i] = NULL;
+ Cmnd->result = (DID_SOFT_ERROR << 16); // ask for retry
+// printk(" BoardLockCmnd[%d] %p Complete, chnl/target/lun %d/%d/%d\n",
+// i,Cmnd, Cmnd->channel, Cmnd->target, Cmnd->lun);
+ if( Cmnd->scsi_done != NULL)
+ (*Cmnd->scsi_done)(Cmnd);
+ }
+ }
+}
+
+
+
+
+
+
+// runs every 1 second for FC exchange timeouts and implicit FC device logouts
+
+void cpqfcTSheartbeat( unsigned long ptr )
+{
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)ptr;
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts;
+ ULONG i;
+ unsigned long flags;
+ DECLARE_MUTEX_LOCKED(BoardLock);
+
+ PCI_TRACE( 0xA8)
+
+ if( cpqfcHBAdata->BoardLock) // Worker Task Running?
+ goto Skip;
+
+ spin_lock_irqsave( &io_request_lock, flags); // STOP _que function
+
+ PCI_TRACE( 0xA8)
+
+
+ cpqfcHBAdata->BoardLock = &BoardLock; // stop Linux SCSI command queuing
+
+ // release the IO lock (and re-enable interrupts)
+ spin_unlock_irqrestore( &io_request_lock, flags);
+
+ // Ensure no contention from _quecommand or Worker process
+ CPQ_SPINLOCK_HBA( cpqfcHBAdata)
+
+ PCI_TRACE( 0xA8)
+
+
+ disable_irq( cpqfcHBAdata->HostAdapter->irq); // our IRQ
+
+ // Complete the "bad target" commands (normally only used during
+ // initialization, since we aren't supposed to call "scsi_done"
+ // inside the queuecommand() function).
+
+ for( i=0; i< CPQFCTS_MAX_TARGET_ID; i++)
+ {
+ if( cpqfcHBAdata->BadTargetCmnd[i] )
+ {
+ Scsi_Cmnd *Cmnd = cpqfcHBAdata->BadTargetCmnd[i];
+ cpqfcHBAdata->BadTargetCmnd[i] = NULL;
+ Cmnd->result = (DID_BAD_TARGET << 16);
+ if( Cmnd->scsi_done != NULL)
+ (*Cmnd->scsi_done)(Cmnd);
+ }
+ else
+ break;
+ }
+
+
+ // logged in ports -- re-login check (ports required to verify login with
+ // PDISC after LIP within 2 secs)
+
+ // prevent contention
+ while( pLoggedInPort ) // for all ports which are expecting
+ // PDISC after the next LIP, check to see if
+ // time is up!
+ {
+ // Important: we only detect "timeout" condition on TRANSITION
+ // from non-zero to zero
+ if( pLoggedInPort->LOGO_timer ) // time-out "armed"?
+ {
+ if( !(--pLoggedInPort->LOGO_timer) ) // DEC from 1 to 0?
+ {
+ // LOGOUT time! Per PLDA, PDISC hasn't complete in 2 secs, so
+ // issue LOGO request and destroy all I/O with other FC port(s).
+
+/*
+ printk(" ~cpqfcTS heartbeat: LOGOut!~ ");
+ printk("Linux SCSI Chanl/Target %d/%d (port_id %06Xh) WWN %08X%08X\n",
+ pLoggedInPort->ScsiNexus.channel,
+ pLoggedInPort->ScsiNexus.target,
+ pLoggedInPort->port_id,
+ (ULONG)(pLoggedInPort->u.liWWN &0xFFFFFFFF),
+ (ULONG)(pLoggedInPort->u.liWWN>>32));
+
+*/
+ cpqfcTSImplicitLogout( cpqfcHBAdata, pLoggedInPort);
+
+ }
+ // else simply decremented - maybe next time...
+ }
+ pLoggedInPort = pLoggedInPort->pNextPort;
+ }
+
+
+
+
+
+ // ************ FC EXCHANGE TIMEOUT CHECK **************
+
+ for( i=0; i< TACH_MAX_XID; i++)
+ {
+ if( Exchanges->fcExchange[i].type ) // exchange defined?
+ {
+
+ if( !Exchanges->fcExchange[i].timeOut ) // time expired
+ {
+ // Set Exchange timeout status
+ Exchanges->fcExchange[i].status |= FC2_TIMEOUT;
+
+ if( i >= TACH_SEST_LEN ) // Link Service Exchange
+ {
+ cpqfcTSCompleteExchange( fcChip, i); // Don't "abort" LinkService
+ }
+
+ else // SEST Exchange TO -- may post ABTS to Worker Thread Que
+ {
+ // (Make sure we don't keep timing it out; let other functions
+ // complete it or set the timeOut as needed)
+ Exchanges->fcExchange[i].timeOut = 30000; // seconds default
+
+ if( Exchanges->fcExchange[i].type
+ &
+ (BLS_ABTS | BLS_ABTS_ACC ) )
+ {
+ // For BLS_ABTS*, an upper level might still have
+ // an outstanding command waiting for low-level completion.
+ // Also, in the case of a WRITE, we MUST get confirmation
+ // of either ABTS ACC or RJT before re-using the Exchange.
+ // It's possible that the RAID cache algorithm can hang
+ // if we fail to complete a WRITE to a LBA, when a READ
+ // comes later to that same LBA. Therefore, we must
+ // ensure that the target verifies receipt of ABTS for
+ // the exchange
+
+ printk("~TO Q'd ABTS (x_ID %Xh)~ ", i);
+// TriggerHBA( fcChip->Registers.ReMapMemBase);
+
+ // On timeout of a ABTS exchange, check to
+ // see if the FC device has a current valid login.
+ // If so, restart it.
+ pLoggedInPort = fcFindLoggedInPort( fcChip,
+ Exchanges->fcExchange[i].Cmnd, // find Scsi Nexus
+ 0, // DON'T search linked list for FC port id
+ NULL, // DON'T search linked list for FC WWN
+ NULL); // DON'T care about end of list
+
+ // device exists?
+ if( pLoggedInPort ) // device exists?
+ {
+ if( pLoggedInPort->prli ) // logged in for FCP-SCSI?
+ {
+ // attempt to restart the ABTS
+ printk(" ~restarting ABTS~ ");
+ cpqfcTSStartExchange( cpqfcHBAdata, i );
+
+ }
+ }
+ }
+ else // not an ABTS
+ {
+
+ // We expect the WorkerThread to change the xchng type to
+ // abort and set appropriate timeout.
+ cpqfcTSPutLinkQue( cpqfcHBAdata, BLS_ABTS, &i ); // timed-out
+ }
+ }
+ }
+ else // time not expired...
+ {
+ // decrement timeout: 1 or more seconds left
+ --Exchanges->fcExchange[i].timeOut;
+ }
+ }
+ }
+
+
+ enable_irq( cpqfcHBAdata->HostAdapter->irq);
+
+
+ CPQ_SPINUNLOCK_HBA( cpqfcHBAdata)
+
+ cpqfcHBAdata->BoardLock = NULL; // Linux SCSI commands may be queued
+
+ // Now, complete any Cmnd we Q'd up while BoardLock was held
+
+ CompleteBoardLockCmnd( cpqfcHBAdata);
+
+
+ // restart the timer to run again (1 sec later)
+Skip:
+ mod_timer( &cpqfcHBAdata->cpqfcTStimer, jiffies + HZ);
+
+ PCI_TRACEO( i, 0xA8)
+ return;
+}
+
+
+// put valid FC-AL physical address in spec order
+static const UCHAR valid_al_pa[]={
+ 0xef, 0xe8, 0xe4, 0xe2,
+ 0xe1, 0xE0, 0xDC, 0xDA,
+ 0xD9, 0xD6, 0xD5, 0xD4,
+ 0xD3, 0xD2, 0xD1, 0xCe,
+ 0xCd, 0xCc, 0xCb, 0xCa,
+ 0xC9, 0xC7, 0xC6, 0xC5,
+ 0xC3, 0xBc, 0xBa, 0xB9,
+ 0xB6, 0xB5, 0xB4, 0xB3,
+ 0xB2, 0xB1, 0xae, 0xad,
+ 0xAc, 0xAb, 0xAa, 0xA9,
+
+ 0xA7, 0xA6, 0xA5, 0xA3,
+ 0x9f, 0x9e, 0x9d, 0x9b,
+ 0x98, 0x97, 0x90, 0x8f,
+ 0x88, 0x84, 0x82, 0x81,
+ 0x80, 0x7c, 0x7a, 0x79,
+ 0x76, 0x75, 0x74, 0x73,
+ 0x72, 0x71, 0x6e, 0x6d,
+ 0x6c, 0x6b, 0x6a, 0x69,
+ 0x67, 0x66, 0x65, 0x63,
+ 0x5c, 0x5a, 0x59, 0x56,
+
+ 0x55, 0x54, 0x53, 0x52,
+ 0x51, 0x4e, 0x4d, 0x4c,
+ 0x4b, 0x4a, 0x49, 0x47,
+ 0x46, 0x45, 0x43, 0x3c,
+ 0x3a, 0x39, 0x36, 0x35,
+ 0x34, 0x33, 0x32, 0x31,
+ 0x2e, 0x2d, 0x2c, 0x2b,
+ 0x2a, 0x29, 0x27, 0x26,
+ 0x25, 0x23, 0x1f, 0x1E,
+ 0x1d, 0x1b, 0x18, 0x17,
+
+ 0x10, 0x0f, 8, 4, 2, 1 }; // ALPA 0 (Fabric) is special case
+
+const int number_of_al_pa = (sizeof(valid_al_pa) );
+
+
+
+// this function looks up an al_pa from the table of valid al_pa's
+// we decrement from the last decimal loop ID, because soft al_pa
+// (our typical case) are assigned with highest priority (and high al_pa)
+// first. See "In-Depth FC-AL", R. Kembel pg. 38
+// INPUTS:
+// al_pa - 24 bit port identifier (8 bit al_pa on private loop)
+// RETURN:
+// Loop ID - serves are index to array of logged in ports
+// -1 - invalid al_pa (not all 8 bit values are legal)
+
+#if (0)
+static int GetLoopID( ULONG al_pa )
+{
+ int i;
+
+ for( i = number_of_al_pa -1; i >= 0; i--) // dec.
+ {
+ if( valid_al_pa[i] == (UCHAR)al_pa ) // take lowest 8 bits
+ return i; // success - found valid al_pa; return decimal LoopID
+ }
+ return -1; // failed - not found
+}
+#endif
+
+
+// Search the singly (forward) linked list "fcPorts" looking for
+// either the SCSI target (if != -1), port_id (if not NULL),
+// or WWN (if not null), in that specific order.
+// If we find a SCSI nexus (from Cmnd arg), set the SCp.phase
+// field according to VSA or PDU
+// RETURNS:
+// Ptr to logged in port struct if found
+// (NULL if not found)
+// pLastLoggedInPort - ptr to last struct (for adding new ones)
+//
+PFC_LOGGEDIN_PORT fcFindLoggedInPort(
+ PTACHYON fcChip,
+ Scsi_Cmnd *Cmnd, // search linked list for Scsi Nexus (channel/target/lun)
+ ULONG port_id, // search linked list for al_pa, or
+ UCHAR wwn[8], // search linked list for WWN, or...
+ PFC_LOGGEDIN_PORT *pLastLoggedInPort )
+
+{
+ PFC_LOGGEDIN_PORT pLoggedInPort = &fcChip->fcPorts;
+ BOOLEAN target_id_valid=FALSE;
+ BOOLEAN port_id_valid=FALSE;
+ BOOLEAN wwn_valid=FALSE;
+ int i;
+
+
+ if( Cmnd != NULL )
+ target_id_valid = TRUE;
+
+ else if( port_id ) // note! 24-bit NULL address is illegal
+ port_id_valid = TRUE;
+
+ else
+ {
+ for( i=0; i<8; i++) // valid WWN passed? NULL WWN invalid
+ {
+ if( wwn ) // non-null arg? (OK to pass NULL when not searching WWN)
+ {
+ if( wwn[i] != 0 )
+ wwn_valid = TRUE; // any non-zero byte makes (presumably) valid
+ }
+ }
+ }
+ // check other options ...
+
+
+ // In case multiple search options are given, we use a priority
+ // scheme:
+ // While valid pLoggedIn Ptr
+ // If port_id is valid
+ // if port_id matches, return Ptr
+ // If wwn is valid
+ // if wwn matches, return Ptr
+ // Next Ptr in list
+ //
+ // Return NULL (not found)
+
+
+ while( pLoggedInPort ) // NULL marks end of list (1st ptr always valid)
+ {
+ if( pLastLoggedInPort ) // caller's pointer valid?
+ *pLastLoggedInPort = pLoggedInPort; // end of linked list
+
+ if( target_id_valid )
+ {
+ // check Linux Scsi Cmnd for channel/target Nexus match
+ // (all luns are accessed through matching "pLoggedInPort")
+ if( (pLoggedInPort->ScsiNexus.target == Cmnd->target)
+ &&
+ (pLoggedInPort->ScsiNexus.channel == Cmnd->channel))
+ {
+ // For "passthru" modes, the IOCTL caller is responsible
+ // for setting the FCP-LUN addressing
+ if( !Cmnd->SCp.sent_command ) // NOT passthru?
+ {
+
+ // set the FCP-LUN addressing type
+ Cmnd->SCp.phase = pLoggedInPort->ScsiNexus.VolumeSetAddressing;
+
+ // set the Device Type we got from the snooped INQUIRY string
+ Cmnd->SCp.Message = pLoggedInPort->ScsiNexus.InqDeviceType;
+
+ // handle LUN masking; if not "default" (illegal) lun value,
+ // the use it. These lun values are set by a successful
+ // Report Luns command
+ if( pLoggedInPort->ScsiNexus.LunMasking == 1)
+ {
+ // we KNOW all the valid LUNs... 0xFF is invalid!
+ Cmnd->SCp.have_data_in = pLoggedInPort->ScsiNexus.lun[Cmnd->lun];
+ }
+ else
+ Cmnd->SCp.have_data_in = Cmnd->lun; // Linux & target luns match
+ }
+ break; // found it!
+ }
+ }
+
+ if( port_id_valid ) // look for alpa first
+ {
+ if( pLoggedInPort->port_id == port_id )
+ break; // found it!
+ }
+ if( wwn_valid ) // look for wwn second
+ {
+
+ if( !memcmp( &pLoggedInPort->u.ucWWN[0], &wwn[0], 8))
+ {
+ // all 8 bytes of WWN match
+ break; // found it!
+ }
+ }
+
+ pLoggedInPort = pLoggedInPort->pNextPort; // try next port
+ }
+
+ return pLoggedInPort;
+}
+
+
+
+
+//
+// We need to examine the SEST table and re-validate
+// any open Exchanges for this LoggedInPort
+// To make Tachyon pay attention, Freeze FCP assists,
+// set VAL bits, Unfreeze FCP assists
+static void RevalidateSEST( struct Scsi_Host *HostAdapter,
+ PFC_LOGGEDIN_PORT pLoggedInPort)
+{
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG x_ID;
+ BOOLEAN TachFroze = FALSE;
+
+
+ // re-validate any SEST exchanges that are permitted
+ // to survive the link down (e.g., good PDISC performed)
+ for( x_ID = 0; x_ID < TACH_SEST_LEN; x_ID++)
+ {
+
+ // If the SEST entry port_id matches the pLoggedInPort,
+ // we need to re-validate
+ if( (Exchanges->fcExchange[ x_ID].type == SCSI_IRE)
+ ||
+ (Exchanges->fcExchange[ x_ID].type == SCSI_IWE))
+ {
+
+ if( (Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF) // (24-bit port ID)
+ == pLoggedInPort->port_id)
+ {
+// printk(" re-val xID %Xh ", x_ID);
+ if( !TachFroze ) // freeze if not already frozen
+ TachFroze |= FreezeTach( cpqfcHBAdata);
+ fcChip->SEST->u[ x_ID].IWE.Hdr_Len |= 0x80000000; // set VAL bit
+ }
+ }
+ }
+
+ if( TachFroze)
+ {
+ fcChip->UnFreezeTachyon( fcChip, 2); // both ERQ and FCP assists
+ }
+}
+
+
+// Complete an Linux Cmnds that we Queued because
+// our FC link was down (cause immediate retry)
+
+static void UnblockScsiDevice( struct Scsi_Host *HostAdapter,
+ PFC_LOGGEDIN_PORT pLoggedInPort)
+{
+// Scsi_Device *sdev = HostAdapter->host_queue;
+ CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
+ Scsi_Cmnd* *SCptr = &cpqfcHBAdata->LinkDnCmnd[0];
+ Scsi_Cmnd *Cmnd;
+ int indx;
+
+
+
+ // if the device was previously "blocked", make sure
+ // we unblock it so Linux SCSI will resume
+
+ pLoggedInPort->device_blocked = FALSE; // clear our flag
+
+ // check the Link Down command ptr buffer;
+ // we can complete now causing immediate retry
+ for( indx=0; indx < CPQFCTS_REQ_QUEUE_LEN; indx++, SCptr++)
+ {
+ if( *SCptr != NULL ) // scsi command to complete?
+ {
+#ifdef DUMMYCMND_DBG
+ printk("complete Cmnd %p in LinkDnCmnd[%d]\n", *SCptr,indx);
+#endif
+ Cmnd = *SCptr;
+
+
+ // Are there any Q'd commands for this target?
+ if( (Cmnd->target == pLoggedInPort->ScsiNexus.target)
+ &&
+ (Cmnd->channel == pLoggedInPort->ScsiNexus.channel) )
+ {
+ Cmnd->result = (DID_SOFT_ERROR <<16); // force retry
+ if( Cmnd->scsi_done != NULL)
+ (*Cmnd->scsi_done)(Cmnd);
+ else
+ printk("LinkDnCmnd scsi_done ptr null, port_id %Xh\n",
+ pLoggedInPort->port_id);
+ *SCptr = NULL; // free this slot for next use
+ }
+ }
+ }
+}
+
+
+//#define WWN_DBG 1
+
+static void SetLoginFields(
+ PFC_LOGGEDIN_PORT pLoggedInPort,
+ TachFCHDR_GCMND* fchs,
+ BOOLEAN PDisc,
+ BOOLEAN Originator)
+{
+ LOGIN_PAYLOAD logi; // FC-PH Port Login
+ PRLI_REQUEST prli; // copy for BIG ENDIAN switch
+ int i;
+#ifdef WWN_DBG
+ ULONG ulBuff;
+#endif
+
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&logi, sizeof(logi));
+
+ pLoggedInPort->Originator = Originator;
+ pLoggedInPort->port_id = fchs->s_id & 0xFFFFFF;
+
+ switch( fchs->pl[0] & 0xffff )
+ {
+ case 0x00000002: // PLOGI or PDISC ACCept?
+ if( PDisc ) // PDISC accept
+ goto PDISC_case;
+
+ case 0x00000003: // ELS_PLOGI or ELS_PLOGI_ACC
+
+ // Login BB_credit typically 0 for Tachyons
+ pLoggedInPort->BB_credit = logi.cmn_services.bb_credit;
+
+ // e.g. 128, 256, 1024, 2048 per FC-PH spec
+ // We have to use this when setting up SEST Writes,
+ // since that determines frame size we send.
+ pLoggedInPort->rx_data_size = logi.class3.rx_data_size;
+ pLoggedInPort->plogi = TRUE;
+ pLoggedInPort->pdisc = FALSE;
+ pLoggedInPort->prli = FALSE; // ELS_PLOGI resets
+ pLoggedInPort->flogi = FALSE; // ELS_PLOGI resets
+ pLoggedInPort->logo = FALSE; // ELS_PLOGI resets
+ pLoggedInPort->LOGO_counter = 0;// ELS_PLOGI resets
+ pLoggedInPort->LOGO_timer = 0;// ELS_PLOGI resets
+
+ // was this PLOGI to a Fabric?
+ if( pLoggedInPort->port_id == 0xFFFFFC ) // well know address
+ pLoggedInPort->flogi = TRUE;
+
+
+ for( i=0; i<8; i++) // copy the LOGIN port's WWN
+ pLoggedInPort->u.ucWWN[i] = logi.port_name[i];
+
+#ifdef WWN_DBG
+ ulBuff = (ULONG)pLoggedInPort->u.liWWN;
+ if( pLoggedInPort->Originator)
+ printk("o");
+ else
+ printk("r");
+ printk("PLOGI port_id %Xh, WWN %08X",
+ pLoggedInPort->port_id, ulBuff);
+
+ ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32);
+ printk("%08Xh fcPort %p\n", ulBuff, pLoggedInPort);
+#endif
+ break;
+
+
+
+
+ case 0x00000005: // ELS_LOGO (logout)
+
+
+ pLoggedInPort->plogi = FALSE;
+ pLoggedInPort->pdisc = FALSE;
+ pLoggedInPort->prli = FALSE; // ELS_PLOGI resets
+ pLoggedInPort->flogi = FALSE; // ELS_PLOGI resets
+ pLoggedInPort->logo = TRUE; // ELS_PLOGI resets
+ pLoggedInPort->LOGO_counter++; // ELS_PLOGI resets
+ pLoggedInPort->LOGO_timer = 0;
+#ifdef WWN_DBG
+ ulBuff = (ULONG)pLoggedInPort->u.liWWN;
+ if( pLoggedInPort->Originator)
+ printk("o");
+ else
+ printk("r");
+ printk("LOGO port_id %Xh, WWN %08X",
+ pLoggedInPort->port_id, ulBuff);
+
+ ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32);
+ printk("%08Xh\n", ulBuff);
+#endif
+ break;
+
+
+
+PDISC_case:
+ case 0x00000050: // ELS_PDISC or ELS_PDISC_ACC
+ pLoggedInPort->LOGO_timer = 0; // stop the time-out
+
+ pLoggedInPort->prli = TRUE; // ready to accept FCP-SCSI I/O
+
+
+
+#ifdef WWN_DBG
+ ulBuff = (ULONG)pLoggedInPort->u.liWWN;
+ if( pLoggedInPort->Originator)
+ printk("o");
+ else
+ printk("r");
+ printk("PDISC port_id %Xh, WWN %08X",
+ pLoggedInPort->port_id, ulBuff);
+
+ ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32);
+ printk("%08Xh\n", ulBuff);
+#endif
+
+
+
+ break;
+
+
+
+ case 0x1020L: // PRLI?
+ case 0x1002L: // PRLI ACCept?
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&prli, sizeof(prli));
+
+ pLoggedInPort->fcp_info = prli.fcp_info; // target/initiator flags
+ pLoggedInPort->prli = TRUE; // PLOGI resets, PDISC doesn't
+
+ pLoggedInPort->pdisc = TRUE; // expect to send (or receive) PDISC
+ // next time
+ pLoggedInPort->LOGO_timer = 0; // will be set next LinkDown
+#ifdef WWN_DBG
+ ulBuff = (ULONG)pLoggedInPort->u.liWWN;
+ if( pLoggedInPort->Originator)
+ printk("o");
+ else
+ printk("r");
+ printk("PRLI port_id %Xh, WWN %08X",
+ pLoggedInPort->port_id, ulBuff);
+
+ ulBuff = (ULONG)(pLoggedInPort->u.liWWN >> 32);
+ printk("%08Xh\n", ulBuff);
+#endif
+
+ break;
+
+ }
+
+ return;
+}
+
+
+
+
+
+
+static void BuildLinkServicePayload( PTACHYON fcChip, ULONG type, void* payload)
+{
+ LOGIN_PAYLOAD *plogi; // FC-PH Port Login
+ LOGIN_PAYLOAD PlogiPayload; // copy for BIG ENDIAN switch
+ PRLI_REQUEST *prli; // FCP-SCSI Process Login
+ PRLI_REQUEST PrliPayload; // copy for BIG ENDIAN switch
+ LOGOUT_PAYLOAD *logo;
+ LOGOUT_PAYLOAD LogoutPayload;
+// PRLO_REQUEST *prlo;
+// PRLO_REQUEST PrloPayload;
+ REJECT_MESSAGE rjt, *prjt;
+
+ memset( &PlogiPayload, 0, sizeof( PlogiPayload));
+ plogi = &PlogiPayload; // load into stack buffer,
+ // then BIG-ENDIAN switch a copy to caller
+
+
+ switch( type ) // payload type can be ELS_PLOGI, ELS_PRLI, ADISC, ...
+ {
+ case ELS_FDISC:
+ case ELS_FLOGI:
+ case ELS_PLOGI_ACC: // FC-PH PORT Login Accept
+ case ELS_PLOGI: // FC-PH PORT Login
+ case ELS_PDISC: // FC-PH2 Port Discovery - same payload as ELS_PLOGI
+ plogi->login_cmd = LS_PLOGI;
+ if( type == ELS_PDISC)
+ plogi->login_cmd = LS_PDISC;
+ else if( type == ELS_PLOGI_ACC )
+ plogi->login_cmd = LS_ACC;
+
+ plogi->cmn_services.bb_credit = 0x00;
+ plogi->cmn_services.lowest_ver = fcChip->lowest_FCPH_ver;
+ plogi->cmn_services.highest_ver = fcChip->highest_FCPH_ver;
+ plogi->cmn_services.bb_rx_size = TACHLITE_TS_RX_SIZE;
+ plogi->cmn_services.common_features = CONTINUOSLY_INCREASING |
+ RANDOM_RELATIVE_OFFSET;
+
+ // fill in with World Wide Name based Port Name - 8 UCHARs
+ // get from Tach registers WWN hi & lo
+ LoadWWN( fcChip, plogi->port_name, 0);
+ // fill in with World Wide Name based Node/Fabric Name - 8 UCHARs
+ // get from Tach registers WWN hi & lo
+ LoadWWN( fcChip, plogi->node_name, 1);
+
+ // For Seagate Drives.
+ //
+ plogi->cmn_services.common_features |= 0x800;
+ plogi->cmn_services.rel_offset = 0xFE;
+ plogi->cmn_services.concurrent_seq = 1;
+ plogi->class1.service_options = 0x00;
+ plogi->class2.service_options = 0x00;
+ plogi->class3.service_options = CLASS_VALID;
+ plogi->class3.initiator_control = 0x00;
+ plogi->class3.rx_data_size = MAX_RX_PAYLOAD;
+ plogi->class3.recipient_control =
+ ERROR_DISCARD | ONE_CATEGORY_SEQUENCE;
+ plogi->class3.concurrent_sequences = 1;
+ plogi->class3.open_sequences = 1;
+ plogi->vendor_id[0] = 'C'; plogi->vendor_id[1] = 'Q';
+ plogi->vendor_version[0] = 'C'; plogi->vendor_version[1] = 'Q';
+ plogi->vendor_version[2] = ' '; plogi->vendor_version[3] = '0';
+ plogi->vendor_version[4] = '0'; plogi->vendor_version[5] = '0';
+
+
+ // FLOGI specific fields... (see FC-FLA, Rev 2.7, Aug 1999, sec 5.1)
+ if( (type == ELS_FLOGI) || (type == ELS_FDISC) )
+ {
+ if( type == ELS_FLOGI )
+ plogi->login_cmd = LS_FLOGI;
+ else
+ plogi->login_cmd = LS_FDISC;
+
+ plogi->cmn_services.lowest_ver = 0x20;
+ plogi->cmn_services.common_features = 0x0800;
+ plogi->cmn_services.rel_offset = 0;
+ plogi->cmn_services.concurrent_seq = 0;
+
+ plogi->class3.service_options = 0x8800;
+ plogi->class3.rx_data_size = 0;
+ plogi->class3.recipient_control = 0;
+ plogi->class3.concurrent_sequences = 0;
+ plogi->class3.open_sequences = 0;
+ }
+
+ // copy back to caller's buff, w/ BIG ENDIAN swap
+ BigEndianSwap( (UCHAR*)&PlogiPayload, payload, sizeof(PlogiPayload));
+ break;
+
+
+ case ELS_ACC: // generic Extended Link Service ACCept
+ plogi->login_cmd = LS_ACC;
+ // copy back to caller's buff, w/ BIG ENDIAN swap
+ BigEndianSwap( (UCHAR*)&PlogiPayload, payload, 4);
+ break;
+
+
+
+ case ELS_SCR: // Fabric State Change Registration
+ {
+ SCR_PL scr; // state change registration
+
+ memset( &scr, 0, sizeof(scr));
+
+ scr.command = LS_SCR; // 0x62000000
+ // see FC-FLA, Rev 2.7, Table A.22 (pg 82)
+ scr.function = 3; // 1 = Events detected by Fabric
+ // 2 = N_Port detected registration
+ // 3 = Full registration
+
+ // copy back to caller's buff, w/ BIG ENDIAN swap
+ BigEndianSwap( (UCHAR*)&scr, payload, sizeof(SCR_PL));
+ }
+
+ break;
+
+
+ case FCS_NSR: // Fabric Name Service Request
+ {
+ NSR_PL nsr; // Name Server Req. payload
+
+ memset( &nsr, 0, sizeof(NSR_PL));
+
+ // see Brocade Fabric Programming Guide,
+ // Rev 1.3, pg 4-44
+ nsr.CT_Rev = 0x01000000;
+ nsr.FCS_Type = 0xFC020000;
+ nsr.Command_code = 0x01710000;
+ nsr.FCP = 8;
+
+ // copy back to caller's buff, w/ BIG ENDIAN swap
+ BigEndianSwap( (UCHAR*)&nsr, payload, sizeof(NSR_PL));
+ }
+
+ break;
+
+
+
+
+ case ELS_LOGO: // FC-PH PORT LogOut
+ logo = &LogoutPayload; // load into stack buffer,
+ // then BIG-ENDIAN switch a copy to caller
+ logo->cmd = LS_LOGO;
+ // load the 3 UCHARs of the node name
+ // (if private loop, upper two UCHARs 0)
+ logo->reserved = 0;
+
+ logo->n_port_identifier[0] = (UCHAR)(fcChip->Registers.my_al_pa);
+ logo->n_port_identifier[1] =
+ (UCHAR)(fcChip->Registers.my_al_pa>>8);
+ logo->n_port_identifier[2] =
+ (UCHAR)(fcChip->Registers.my_al_pa>>16);
+ // fill in with World Wide Name based Port Name - 8 UCHARs
+ // get from Tach registers WWN hi & lo
+ LoadWWN( fcChip, logo->port_name, 0);
+
+ BigEndianSwap( (UCHAR*)&LogoutPayload,
+ payload, sizeof(LogoutPayload) ); // 16 UCHAR struct
+ break;
+
+
+ case ELS_LOGO_ACC: // Logout Accept (FH-PH pg 149, table 74)
+ logo = &LogoutPayload; // load into stack buffer,
+ // then BIG-ENDIAN switch a copy to caller
+ logo->cmd = LS_ACC;
+ BigEndianSwap( (UCHAR*)&LogoutPayload, payload, 4 ); // 4 UCHAR cmnd
+ break;
+
+
+ case ELS_RJT: // ELS_RJT link service reject (FH-PH pg 155)
+
+ prjt = (REJECT_MESSAGE*)payload; // pick up passed data
+ rjt.command_code = ELS_RJT;
+ // reverse fields, because of Swap that follows...
+ rjt.vendor = prjt->reserved; // vendor specific
+ rjt.explain = prjt->reason; //
+ rjt.reason = prjt->explain; //
+ rjt.reserved = prjt->vendor; //
+ // BIG-ENDIAN switch a copy to caller
+ BigEndianSwap( (UCHAR*)&rjt, payload, 8 ); // 8 UCHAR cmnd
+ break;
+
+
+
+
+
+ case ELS_PRLI_ACC: // Process Login ACCept
+ case ELS_PRLI: // Process Login
+ case ELS_PRLO: // Process Logout
+ memset( &PrliPayload, 0, sizeof( PrliPayload));
+ prli = &PrliPayload; // load into stack buffer,
+
+ if( type == ELS_PRLI )
+ prli->cmd = 0x20; // Login
+ else if( type == ELS_PRLO )
+ prli->cmd = 0x21; // Logout
+ else if( type == ELS_PRLI_ACC )
+ {
+ prli->cmd = 0x02; // Login ACCept
+ prli->valid = REQUEST_EXECUTED;
+ }
+
+
+ prli->valid |= SCSI_FCP | ESTABLISH_PAIR;
+ prli->fcp_info = READ_XFER_RDY;
+ prli->page_length = 0x10;
+ prli->payload_length = 20;
+ // Can be initiator AND target
+
+ if( fcChip->Options.initiator )
+ prli->fcp_info |= INITIATOR_FUNCTION;
+ if( fcChip->Options.target )
+ prli->fcp_info |= TARGET_FUNCTION;
+
+ BigEndianSwap( (UCHAR*)&PrliPayload, payload, prli->payload_length);
+ break;
+
+
+
+ default: // no can do - programming error
+ printk(" BuildLinkServicePayload unknown!\n");
+ break;
+ }
+}
+
+// loads 8 UCHARs for PORT name or NODE name base on
+// controller's WWN.
+void LoadWWN( PTACHYON fcChip, UCHAR* dest, UCHAR type)
+{
+ UCHAR* bPtr, i;
+
+ switch( type )
+ {
+ case 0: // Port_Name
+ bPtr = (UCHAR*)&fcChip->Registers.wwn_hi;
+ for( i =0; i<4; i++)
+ dest[i] = *bPtr++;
+ bPtr = (UCHAR*)&fcChip->Registers.wwn_lo;
+ for( i =4; i<8; i++)
+ dest[i] = *bPtr++;
+ break;
+ case 1: // Node/Fabric _Name
+ bPtr = (UCHAR*)&fcChip->Registers.wwn_hi;
+ for( i =0; i<4; i++)
+ dest[i] = *bPtr++;
+ bPtr = (UCHAR*)&fcChip->Registers.wwn_lo;
+ for( i =4; i<8; i++)
+ dest[i] = *bPtr++;
+ break;
+ }
+
+}
+
+
+
+// We check the Port Login payload for required values. Note that
+// ELS_PLOGI and ELS_PDISC (Port DISCover) use the same payload.
+
+
+int verify_PLOGI( PTACHYON fcChip,
+ TachFCHDR_GCMND* fchs,
+ ULONG* reject_explain)
+{
+ LOGIN_PAYLOAD login;
+
+ // source, dest, len (should be mult. of 4)
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&login, sizeof(login));
+
+ // check FC version
+ // if other port's highest supported version
+ // is less than our lowest, and
+ // if other port's lowest
+ if( login.cmn_services.highest_ver < fcChip->lowest_FCPH_ver ||
+ login.cmn_services.lowest_ver > fcChip->highest_FCPH_ver )
+ {
+ *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, OPTIONS_ERROR);
+ return LOGICAL_ERROR;
+ }
+
+ // Receive Data Field Size must be >=128
+ // per FC-PH
+ if (login.cmn_services.bb_rx_size < 128)
+ {
+ *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, DATA_FIELD_SIZE_ERROR);
+ return LOGICAL_ERROR;
+ }
+
+ // Only check Class 3 params
+ if( login.class3.service_options & CLASS_VALID)
+ {
+ if (login.class3.rx_data_size < 128)
+ {
+ *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, INVALID_CSP);
+ return LOGICAL_ERROR;
+ }
+ if( login.class3.initiator_control & XID_REQUIRED)
+ {
+ *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, INITIATOR_CTL_ERROR);
+ return LOGICAL_ERROR;
+ }
+ }
+ return 0; // success
+}
+
+
+
+
+int verify_PRLI( TachFCHDR_GCMND* fchs, ULONG* reject_explain)
+{
+ PRLI_REQUEST prli; // buffer for BIG ENDIAN
+
+ // source, dest, len (should be mult. of 4)
+ BigEndianSwap( (UCHAR*)&fchs->pl[0], (UCHAR*)&prli, sizeof(prli));
+
+ if( prli.fcp_info == 0 ) // i.e., not target or initiator?
+ {
+ *reject_explain = LS_RJT_REASON( LOGICAL_ERROR, OPTIONS_ERROR);
+ return LOGICAL_ERROR;
+ }
+
+ return 0; // success
+}
+
+
+// SWAP UCHARs as required by Fibre Channel (i.e. BIG ENDIAN)
+// INPUTS:
+// source - ptr to LITTLE ENDIAN ULONGS
+// cnt - number of UCHARs to switch (should be mult. of ULONG)
+// OUTPUTS:
+// dest - ptr to BIG ENDIAN copy
+// RETURN:
+// none
+//
+void BigEndianSwap( UCHAR *source, UCHAR *dest, USHORT cnt)
+{
+ int i,j;
+
+ source+=3; // start at MSB of 1st ULONG
+ for( j=0; j < cnt; j+=4, source+=4, dest+=4) // every ULONG
+ {
+ for( i=0; i<4; i++) // every UCHAR in ULONG
+ *(dest+i) = *(source-i);
+ }
+}
+
+
+
+
+// Build FC Exchanges............
+
+static void buildFCPstatus(
+ PTACHYON fcChip,
+ ULONG ExchangeID);
+
+static LONG FindFreeExchange( PTACHYON fcChip, ULONG type );
+
+static ULONG build_SEST_sgList(
+ ULONG *SESTalPairStart,
+ Scsi_Cmnd *Cmnd,
+ ULONG *sgPairs,
+ PSGPAGES sgPages // link list of TL Ext. S/G pages from O/S Pool
+);
+
+static int build_FCP_payload( Scsi_Cmnd *Cmnd,
+ UCHAR* payload, ULONG type, ULONG fcp_dl );
+
+
+/*
+ IRB
+ ERQ __________________
+ | | / | Req_A_SFS_Len | ____________________
+ |----------| / | Req_A_SFS_Addr |------->| Reserved |
+ | IRB | / | Req_A_D_ID | | SOF EOF TimeStamp |
+ |-----------/ | Req_A_SEST_Index |-+ | R_CTL | D_ID |
+ | IRB | | Req_B... | | | CS_CTL| S_ID |
+ |-----------\ | | | | TYPE | F_CTL |
+ | IRB | \ | | | | SEQ_ID | SEQ_CNT |
+ |----------- \ | | +-->+--| OX_ID | RX_ID |
+ | | \ |__________________| | | RO |
+ | | pl (payload/cmnd) |
+ | | ..... |
+ | |___________________|
+ |
+ |
++-------------------------------------------+
+|
+|
+| e.g. IWE
+| SEST __________________ for FCP_DATA
+| | | / | | Hdr_Len | ____________________
+| |----------| / | Hdr_Addr_Addr |------->| Reserved |
+| | [0] | / |Remote_ID| RSP_Len| | SOF EOF TimeStamp |
+| |-----------/ | RSP_Addr |---+ | R_CTL | D_ID |
++-> [1] | | | Buff_Off | | | CS_CTL| S_ID |
+ |-----------\ |BuffIndex| Link | | | TYPE | F_CTL |
+ | [2] | \ | Rsvd | RX_ID | | | SEQ_ID | SEQ_CNT |
+ |----------- \ | Data_Len | | | OX_ID | RX_ID |
+ | ... | \ | Exp_RO | | | RO |
+ |----------| | Exp_Byte_Cnt | | |___________________|
+ | SEST_LEN | +--| Len | |
+ |__________| | | Address | |
+ | | ... | | for FCP_RSP
+ | |__________________| | ____________________
+ | +----| Reserved |
+ | | SOF EOF TimeStamp |
+ | | R_CTL | D_ID |
+ | | CS_CTL| S_ID |
+ +--- local or extended | .... |
+ scatter/gather lists
+ defining upper-layer
+ data (e.g. from user's App)
+
+
+*/
+// All TachLite commands must start with a SFS (Single Frame Sequence)
+// command. In the simplest case (a NOP Basic Link command),
+// only one frame header and ERQ entry is required. The most complex
+// case is the SCSI assisted command, which requires an ERQ entry,
+// SEST entry, and several frame headers and data buffers all
+// logically linked together.
+// Inputs:
+// cpqfcHBAdata - controller struct
+// type - PLOGI, SCSI_IWE, etc.
+// InFCHS - Incoming Tachlite FCHS which prompted this exchange
+// (only s_id set if we are originating)
+// Data - PVOID to data struct consistent with "type"
+// fcExchangeIndex - pointer to OX/RD ID value of built exchange
+// Return:
+// fcExchangeIndex - OX/RD ID value if successful
+// 0 - success
+// INVALID_ARGS - NULL/ invalid passed args
+// BAD_ALPA - Bad source al_pa address
+// LNKDWN_OSLS - Link Down (according to this controller)
+// OUTQUE_FULL - Outbound Que full
+// DRIVERQ_FULL - controller's Exchange array full
+// SEST_FULL - SEST table full
+//
+// Remarks:
+// Psuedo code:
+// Check for NULL pointers / bad args
+// Build outgoing FCHS - the header/payload struct
+// Build IRB (for ERQ entry)
+// if SCSI command, build SEST entry (e.g. IWE, TRE,...)
+// return success
+
+//sbuildex
+ULONG cpqfcTSBuildExchange(
+ CPQFCHBA *cpqfcHBAdata,
+ ULONG type, // e.g. PLOGI
+ TachFCHDR_GCMND* InFCHS, // incoming FCHS
+ void *Data, // the CDB, scatter/gather, etc.
+ LONG *fcExchangeIndex ) // points to allocated exchange,
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG ulStatus = 0; // assume OK
+ USHORT ox_ID, rx_ID=0xFFFF;
+ ULONG SfsLen=0L;
+ TachLiteIRB* pIRB;
+ IRBflags IRB_flags;
+ UCHAR *pIRB_flags = (UCHAR*)&IRB_flags;
+ TachFCHDR_GCMND* CMDfchs;
+ TachFCHDR* dataHDR; // 32 byte HEADER ONLY FCP-DATA buffer
+ TachFCHDR_RSP* rspHDR; // 32 byte header + RSP payload
+ Scsi_Cmnd *Cmnd = (Scsi_Cmnd*)Data; // Linux Scsi CDB, S/G, ...
+ TachLiteIWE* pIWE;
+ TachLiteIRE* pIRE;
+ TachLiteTWE* pTWE;
+ TachLiteTRE* pTRE;
+ ULONG fcp_dl; // total byte length of DATA transfered
+ ULONG fl; // frame length (FC frame size, 128, 256, 512, 1024)
+ ULONG sgPairs; // number of valid scatter/gather pairs
+ int FCP_SCSI_command;
+ BA_ACC_PAYLOAD *ba_acc;
+ BA_RJT_PAYLOAD *ba_rjt;
+
+ // check passed ARGS
+ if( !fcChip->ERQ ) // NULL ptr means uninitialized Tachlite chip
+ return INVALID_ARGS;
+
+
+ if( type == SCSI_IRE ||
+ type == SCSI_TRE ||
+ type == SCSI_IWE ||
+ type == SCSI_TWE)
+ FCP_SCSI_command = 1;
+
+ else
+ FCP_SCSI_command = 0;
+
+
+ // for commands that pass payload data (e.g. SCSI write)
+ // examine command struct - verify that the
+ // length of s/g buffers is adequate for total payload
+ // length (end of list is NULL address)
+
+ if( FCP_SCSI_command )
+ {
+ if( Data ) // must have data descriptor (S/G list -- at least
+ // one address with at least 1 byte of data)
+ {
+ // something to do (later)?
+ }
+
+ else
+ return INVALID_ARGS; // invalid DATA ptr
+ }
+
+
+
+ // we can build an Exchange for later Queuing (on the TL chip)
+ // if an empty slot is available in the DevExt for this controller
+ // look for available Exchange slot...
+
+ if( type != FCP_RESPONSE &&
+ type != BLS_ABTS &&
+ type != BLS_ABTS_ACC ) // already have Exchange slot!
+ *fcExchangeIndex = FindFreeExchange( fcChip, type );
+
+ if( *fcExchangeIndex != -1 ) // Exchange is available?
+ {
+ // assign tmp ptr (shorthand)
+ CMDfchs = &Exchanges->fcExchange[ *fcExchangeIndex].fchs;
+
+
+ if( Cmnd != NULL ) // (necessary for ABTS cases)
+ {
+ Exchanges->fcExchange[ *fcExchangeIndex].Cmnd = Cmnd; // Linux Scsi
+ Exchanges->fcExchange[ *fcExchangeIndex].pLoggedInPort =
+ fcFindLoggedInPort( fcChip,
+ Exchanges->fcExchange[ *fcExchangeIndex].Cmnd, // find Scsi Nexus
+ 0, // DON'T search linked list for FC port id
+ NULL, // DON'T search linked list for FC WWN
+ NULL); // DON'T care about end of list
+
+ }
+
+
+ // Build the command frame header (& data) according
+ // to command type
+
+ // fields common for all SFS frame types
+ CMDfchs->reserved = 0L; // must clear
+ CMDfchs->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; LCr=0, no TS
+
+ // get the destination port_id from incoming FCHS
+ // (initialized before calling if we're Originator)
+ // Frame goes to port it was from - the source_id
+
+ CMDfchs->d_id = InFCHS->s_id &0xFFFFFF; // destination (add R_CTL later)
+ CMDfchs->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0
+
+
+ // now enter command-specific fields
+ switch( type )
+ {
+
+ case BLS_NOP: // FC defined basic link service command NO-OP
+ // ensure unique X_IDs! (use tracking function)
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 32L; // add len to LSB (header only - no payload)
+
+ // TYPE[31-24] 00 Basic Link Service
+ // f_ctl[23:0] exchg originator, 1st seq, xfer S.I.
+ CMDfchs->d_id |= 0x80000000L; // R_CTL = 80 for NOP (Basic Link Ser.)
+ CMDfchs->f_ctl = 0x00310000L; // xchng originator, 1st seq,....
+ CMDfchs->seq_cnt = 0x0L;
+ CMDfchs->ox_rx_id = 0xFFFF; // RX_ID for now; OX_ID on start
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+ CMDfchs->pl[0] = 0xaabbccddL; // words 8-15 frame data payload (n/a)
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 1; // seconds
+ // (NOP should complete ~instantly)
+ break;
+
+
+
+
+ case BLS_ABTS_ACC: // Abort Sequence ACCept
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 32 + 12; // add len to LSB (header + 3 DWORD payload)
+
+ CMDfchs->d_id |= 0x84000000L; // R_CTL = 84 for BASIC ACCept
+ // TYPE[31-24] 00 Basic Link Service
+ // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I.
+ CMDfchs->f_ctl = 0x00910000L; // xchnge responder, last seq, xfer SI
+ // CMDfchs->seq_id & count might be set from DataHdr?
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 5; // seconds
+ // (Timeout in case of weird error)
+
+ // now set the ACCept payload...
+ ba_acc = (BA_ACC_PAYLOAD*)&CMDfchs->pl[0];
+ memset( ba_acc, 0, sizeof( BA_ACC_PAYLOAD));
+ // Since PLDA requires (only) entire Exchange aborts, we don't need
+ // to worry about what the last sequence was.
+
+ // We expect that a "target" task is accepting the abort, so we
+ // can use the OX/RX ID pair
+ ba_acc->ox_rx_id = CMDfchs->ox_rx_id;
+
+ // source, dest, #bytes
+ BigEndianSwap((UCHAR *)&CMDfchs->ox_rx_id, (UCHAR *)&ba_acc->ox_rx_id, 4);
+
+ ba_acc->low_seq_cnt = 0;
+ ba_acc->high_seq_cnt = 0xFFFF;
+
+
+ break;
+
+
+ case BLS_ABTS_RJT: // Abort Sequence ACCept
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 32 + 12; // add len to LSB (header + 3 DWORD payload)
+
+ CMDfchs->d_id |= 0x85000000L; // R_CTL = 85 for BASIC ReJecT
+ // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I.
+ // TYPE[31-24] 00 Basic Link Service
+ CMDfchs->f_ctl = 0x00910000L; // xchnge responder, last seq, xfer SI
+ // CMDfchs->seq_id & count might be set from DataHdr?
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 5; // seconds
+ // (Timeout in case of weird error)
+
+ CMDfchs->ox_rx_id = InFCHS->ox_rx_id; // copy from sender!
+
+ // now set the ReJecT payload...
+ ba_rjt = (BA_RJT_PAYLOAD*)&CMDfchs->pl[0];
+ memset( ba_rjt, 0, sizeof( BA_RJT_PAYLOAD));
+
+ // We expect that a "target" task couldn't find the Exhange in the
+ // array of active exchanges, so we use a new LinkService X_ID.
+ // See Reject payload description in FC-PH (Rev 4.3), pg. 140
+ ba_rjt->reason_code = 0x09; // "unable to perform command request"
+ ba_rjt->reason_explain = 0x03; // invalid OX/RX ID pair
+
+
+ break;
+
+
+
+ case BLS_ABTS: // FC defined basic link service command ABTS
+ // Abort Sequence
+
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 32L; // add len to LSB (header only - no payload)
+
+ // TYPE[31-24] 00 Basic Link Service
+ // f_ctl[23:0] exchg originator, not 1st seq, xfer S.I.
+ CMDfchs->d_id |= 0x81000000L; // R_CTL = 81 for ABTS
+ CMDfchs->f_ctl = 0x00110000L; // xchnge originator, last seq, xfer SI
+ // CMDfchs->seq_id & count might be set from DataHdr?
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds
+ // (ABTS must timeout when responder is gone)
+ break;
+
+
+
+ case FCS_NSR: // Fabric Name Service Request
+ Exchanges->fcExchange[ *fcExchangeIndex].reTries = 2;
+
+
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds
+ // OX_ID, linked to Driver Transaction ID
+ // (fix-up at Queing time)
+ CMDfchs->ox_rx_id = 0xFFFF; // RX_ID - Responder (target) to modify
+ // OX_ID set at ERQueing time
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += (32L + sizeof(NSR_PL)); // add len (header & NSR payload)
+
+ CMDfchs->d_id |= 0x02000000L; // R_CTL = 02 for -
+ // Name Service Request: Unsolicited
+ // TYPE[31-24] 01 Extended Link Service
+ // f_ctl[23:0] exchg originator, 1st seq, xfer S.I.
+ CMDfchs->f_ctl = 0x20210000L;
+ // OX_ID will be fixed-up at Tachyon enqueing time
+ CMDfchs->seq_cnt = 0; // seq ID, DF_ctl, seq cnt
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+ BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]);
+
+
+
+
+
+
+ break;
+
+
+
+
+ case ELS_PLOGI: // FC-PH extended link service command Port Login
+ // (May, 2000)
+ // NOTE! This special case facilitates SANMark testing. The SANMark
+ // test script for initialization-timeout.fcal.SANMark-1.fc
+ // "eats" the OPN() primitive without issuing an R_RDY, causing
+ // Tachyon to report LST (loop state timeout), which causes a
+ // LIP. To avoid this, simply send out the frame (i.e. assuming a
+ // buffer credit of 1) without waiting for R_RDY. Many FC devices
+ // (other than Tachyon) have been doing this for years. We don't
+ // ever want to do this for non-Link Service frames unless the
+ // other device really did report non-zero login BB credit (i.e.
+ // in the PLOGI ACCept frame).
+// CMDfchs->sof_eof |= 0x00000400L; // LCr=1
+
+ case ELS_FDISC: // Fabric Discovery (Login)
+ case ELS_FLOGI: // Fabric Login
+ case ELS_SCR: // Fabric State Change Registration
+ case ELS_LOGO: // FC-PH extended link service command Port Logout
+ case ELS_PDISC: // FC-PH extended link service cmnd Port Discovery
+ case ELS_PRLI: // FC-PH extended link service cmnd Process Login
+
+ Exchanges->fcExchange[ *fcExchangeIndex].reTries = 2;
+
+
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 2; // seconds
+ // OX_ID, linked to Driver Transaction ID
+ // (fix-up at Queing time)
+ CMDfchs->ox_rx_id = 0xFFFF; // RX_ID - Responder (target) to modify
+ // OX_ID set at ERQueing time
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ if( type == ELS_LOGO )
+ SfsLen += (32L + 16L); // add len (header & PLOGI payload)
+ else if( type == ELS_PRLI )
+ SfsLen += (32L + 20L); // add len (header & PRLI payload)
+ else if( type == ELS_SCR )
+ SfsLen += (32L + sizeof(SCR_PL)); // add len (header & SCR payload)
+ else
+ SfsLen += (32L + 116L); // add len (header & PLOGI payload)
+
+ CMDfchs->d_id |= 0x22000000L; // R_CTL = 22 for -
+ // Extended Link_Data: Unsolicited Control
+ // TYPE[31-24] 01 Extended Link Service
+ // f_ctl[23:0] exchg originator, 1st seq, xfer S.I.
+ CMDfchs->f_ctl = 0x01210000L;
+ // OX_ID will be fixed-up at Tachyon enqueing time
+ CMDfchs->seq_cnt = 0; // seq ID, DF_ctl, seq cnt
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+ BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]);
+
+ break;
+
+
+
+ case ELS_LOGO_ACC: // FC-PH extended link service logout accept
+ case ELS_RJT: // extended link service reject (add reason)
+ case ELS_ACC: // ext. link service generic accept
+ case ELS_PLOGI_ACC:// ext. link service login accept (PLOGI or PDISC)
+ case ELS_PRLI_ACC: // ext. link service process login accept
+
+
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 1; // assume done
+ // ensure unique X_IDs! (use tracking function)
+ // OX_ID from initiator cmd
+ ox_ID = (USHORT)(InFCHS->ox_rx_id >> 16);
+ rx_ID = 0xFFFF; // RX_ID, linked to Driver Exchange ID
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (not SEST index)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ if( type == ELS_RJT )
+ {
+ SfsLen += (32L + 8L); // add len (header + payload)
+
+ // ELS_RJT reason codes (utilize unused "reserved" field)
+ CMDfchs->pl[0] = 1;
+ CMDfchs->pl[1] = InFCHS->reserved;
+
+ }
+ else if( (type == ELS_LOGO_ACC) || (type == ELS_ACC) )
+ SfsLen += (32L + 4L); // add len (header + payload)
+ else if( type == ELS_PLOGI_ACC )
+ SfsLen += (32L + 116L); // add len (header + payload)
+ else if( type == ELS_PRLI_ACC )
+ SfsLen += (32L + 20L); // add len (header + payload)
+
+ CMDfchs->d_id |= 0x23000000L; // R_CTL = 23 for -
+ // Extended Link_Data: Control Reply
+ // TYPE[31-24] 01 Extended Link Service
+ // f_ctl[23:0] exchg responder, last seq, e_s, tsi
+ CMDfchs->f_ctl = 0x01990000L;
+ CMDfchs->seq_cnt = 0x0L;
+ CMDfchs->ox_rx_id = 0L; // clear
+ CMDfchs->ox_rx_id = ox_ID; // load upper 16 bits
+ CMDfchs->ox_rx_id <<= 16; // shift them
+
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+ BuildLinkServicePayload( fcChip, type, &CMDfchs->pl[0]);
+
+ break;
+
+
+ // Fibre Channel SCSI 'originator' sequences...
+ // (originator means 'initiator' in FCP-SCSI)
+ case SCSI_IWE: // TachLite Initiator Write Entry
+ {
+ PFC_LOGGEDIN_PORT pLoggedInPort =
+ Exchanges->fcExchange[ *fcExchangeIndex].pLoggedInPort;
+
+ Exchanges->fcExchange[ *fcExchangeIndex].reTries = 1;
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 7; // FC2 timeout
+
+ // first, build FCP_CMND
+ // unique X_ID fix-ups in StartExchange
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS FCP-CMND (not SEST index)
+
+ // NOTE: unlike FC LinkService login frames, normal
+ // SCSI commands are sent without outgoing verification
+ IRB_flags.DCM = 1; // Disable completion message for Cmnd frame
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 64L; // add len to LSB (header & CMND payload)
+
+ CMDfchs->d_id |= (0x06000000L); // R_CTL = 6 for command
+
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] exchg originator, 1st seq, xfer S.I.
+ // valid RO
+ CMDfchs->f_ctl = 0x08210008L;
+ CMDfchs->seq_cnt = 0x0L;
+ CMDfchs->ox_rx_id = 0L; // clear for now (-or- in later)
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+ // now, fill out FCP-DATA header
+ // (use buffer inside SEST object)
+ dataHDR = &fcChip->SEST->DataHDR[ *fcExchangeIndex ];
+ dataHDR->reserved = 0L; // must clear
+ dataHDR->sof_eof = 0x75002000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS
+ dataHDR->d_id = (InFCHS->s_id | 0x01000000L); // R_CTL= FCP_DATA
+ dataHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] xfer S.I.| valid RO
+ dataHDR->f_ctl = 0x08010008L;
+ dataHDR->seq_cnt = 0x02000000L; // sequence ID: df_ctl : seqence count
+ dataHDR->ox_rx_id = 0L; // clear; fix-up dataHDR fields later
+ dataHDR->ro = 0x0L; // relative offset (n/a)
+
+ // Now setup the SEST entry
+ pIWE = &fcChip->SEST->u[ *fcExchangeIndex ].IWE;
+
+ // fill out the IWE:
+
+ // VALid entry:Dir outbound:DCM:enable CM:enal INT: FC frame len
+ pIWE->Hdr_Len = 0x8e000020L; // data frame Len always 32 bytes
+
+
+ // from login parameters with other port, what's the largest frame
+ // we can send?
+ if( pLoggedInPort == NULL)
+ {
+ ulStatus = INVALID_ARGS; // failed! give up
+ break;
+ }
+ if( pLoggedInPort->rx_data_size >= 2048)
+ fl = 0x00020000; // 2048 code (only support 1024!)
+ else if( pLoggedInPort->rx_data_size >= 1024)
+ fl = 0x00020000; // 1024 code
+ else if( pLoggedInPort->rx_data_size >= 512)
+ fl = 0x00010000; // 512 code
+ else
+ fl = 0; // 128 bytes -- should never happen
+
+
+ pIWE->Hdr_Len |= fl; // add xmit FC frame len for data phase
+ pIWE->Hdr_Addr = virt_to_bus( dataHDR );
+ pIWE->RSP_Len = sizeof(TachFCHDR_RSP) ; // hdr+data (recv'd RSP frame)
+ pIWE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID
+
+ memset( &fcChip->SEST->RspHDR[ *fcExchangeIndex].pl, 0,
+ sizeof( FCP_STATUS_RESPONSE) ); // clear out previous status
+
+ pIWE->RSP_Addr = virt_to_bus(
+ &fcChip->SEST->RspHDR[ *fcExchangeIndex ]);
+
+ // Do we need local or extended gather list?
+ // depends on size - we can handle 3 len/addr pairs
+ // locally.
+
+ fcp_dl = build_SEST_sgList(
+ &pIWE->GLen1,
+ Cmnd, // S/G list
+ &sgPairs, // return # of pairs in S/G list (from "Data" descriptor)
+ &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later)
+
+ if( !fcp_dl ) // error building S/G list?
+ {
+ ulStatus = MEMPOOL_FAIL;
+ break; // give up
+ }
+
+ // Now that we know total data length in
+ // the passed S/G buffer, set FCP CMND frame
+ build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl );
+
+
+
+ if( sgPairs > 3 ) // need extended s/g list
+ pIWE->Buff_Off = 0x78000000L; // extended data | (no offset)
+ else // local data pointers (in SEST)
+ pIWE->Buff_Off = 0xf8000000L; // local data | (no offset)
+
+ // ULONG 5
+ pIWE->Link = 0x0000ffffL; // Buff_Index | Link
+
+ pIWE->RX_ID = 0x0L; // DWord 6: RX_ID set by target XFER_RDY
+
+ // DWord 7
+ pIWE->Data_Len = 0L; // TL enters rcv'd XFER_RDY BURST_LEN
+ pIWE->Exp_RO = 0L; // DWord 8
+ // DWord 9
+ pIWE->Exp_Byte_Cnt = fcp_dl; // sum of gather buffers
+ }
+ break;
+
+
+
+
+
+ case SCSI_IRE: // TachLite Initiator Read Entry
+
+ if( Cmnd->timeout != 0)
+ {
+// printk("Cmnd->timeout %d\n", Cmnd->timeout);
+ // per Linux Scsi
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = Cmnd->timeout;
+ }
+ else // use our best guess, based on FC & device
+ {
+
+ if( Cmnd->SCp.Message == 1 ) // Tape device? (from INQUIRY)
+ {
+ // turn off our timeouts (for now...)
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 0xFFFFFFFF;
+ }
+ else
+ {
+ Exchanges->fcExchange[ *fcExchangeIndex].reTries = 1;
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 7; // per SCSI req.
+ }
+ }
+
+
+ // first, build FCP_CMND
+
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS FCP-CMND (not SEST index)
+ // NOTE: unlike FC LinkService login frames,
+ // normal SCSI commands are sent "open loop"
+ IRB_flags.DCM = 1; // Disable completion message for Cmnd frame
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += 64L; // add len to LSB (header & CMND payload)
+
+ CMDfchs->d_id |= (0x06000000L); // R_CTL = 6 for command
+
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] exchg originator, 1st seq, xfer S.I.
+ // valid RO
+ CMDfchs->f_ctl = 0x08210008L;
+ CMDfchs->seq_cnt = 0x0L;
+ // x_ID & data direction bit set later
+ CMDfchs->ox_rx_id = 0xFFFF; // clear
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+
+
+ // Now setup the SEST entry
+ pIRE = &fcChip->SEST->u[ *fcExchangeIndex ].IRE;
+
+ // fill out the IRE:
+ // VALid entry:Dir outbound:enable CM:enal INT:
+ pIRE->Seq_Accum = 0xCE000000L; // VAL,DIR inbound,DCM| INI,DAT,RSP
+
+ pIRE->reserved = 0L;
+ pIRE->RSP_Len = sizeof(TachFCHDR_RSP) ; // hdr+data (recv'd RSP frame)
+ pIRE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID
+
+
+ pIRE->RSP_Addr = virt_to_bus(
+ &fcChip->SEST->RspHDR[ *fcExchangeIndex ]);
+
+
+ // Do we need local or extended gather list?
+ // depends on size - we can handle 3 len/addr pairs
+ // locally.
+
+ fcp_dl = build_SEST_sgList(
+ &pIRE->SLen1,
+ Cmnd, // SCSI command Data desc. with S/G list
+ &sgPairs, // return # of pairs in S/G list (from "Data" descriptor)
+ &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later)
+
+
+ if( !fcp_dl ) // error building S/G list?
+ {
+ // It is permissible to have a ZERO LENGTH Read command.
+ // If there is the case, simply set fcp_dl (and Exp_Byte_Cnt)
+ // to 0 and continue.
+ if( Cmnd->request_bufflen == 0 )
+ {
+ fcp_dl = 0; // no FC DATA frames expected
+
+ }
+ else
+ {
+ ulStatus = MEMPOOL_FAIL;
+ break; // give up
+ }
+ }
+
+ // now that we know the S/G length, build CMND payload
+ build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl );
+
+
+ if( sgPairs > 3 ) // need extended s/g list
+ pIRE->Buff_Off = 0x00000000; // DWord 4: extended s/g list, no offset
+ else
+ pIRE->Buff_Off = 0x80000000; // local data, no offset
+
+ pIRE->Buff_Index = 0x0L; // DWord 5: Buff_Index | Reserved
+
+ pIRE->Exp_RO = 0x0L; // DWord 6: Expected Rel. Offset
+
+ pIRE->Byte_Count = 0; // DWord 7: filled in by TL on err
+ pIRE->reserved_ = 0; // DWord 8: reserved
+ // NOTE: 0 length READ is OK.
+ pIRE->Exp_Byte_Cnt = fcp_dl;// DWord 9: sum of scatter buffers
+
+ break;
+
+
+
+
+ // Fibre Channel SCSI 'responder' sequences...
+ // (originator means 'target' in FCP-SCSI)
+ case SCSI_TWE: // TachLite Target Write Entry
+
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 10; // per SCSI req.
+
+ // first, build FCP_CMND
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (XFER_RDY)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += (32L + 12L);// add SFS len (header & XFER_RDY payload)
+
+ CMDfchs->d_id |= (0x05000000L); // R_CTL = 5 for XFER_RDY
+
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] exchg responder, 1st seq, xfer S.I.
+ // valid RO
+ CMDfchs->f_ctl = 0x08810008L;
+ CMDfchs->seq_cnt = 0x01000000; // sequence ID: df_ctl: sequence count
+ // use originator (other port's) OX_ID
+ CMDfchs->ox_rx_id = InFCHS->ox_rx_id; // we want upper 16 bits
+ CMDfchs->ro = 0x0L; // relative offset (n/a)
+
+ // now, fill out FCP-RSP header
+ // (use buffer inside SEST object)
+
+ rspHDR = &fcChip->SEST->RspHDR[ *fcExchangeIndex ];
+ rspHDR->reserved = 0L; // must clear
+ rspHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS
+ rspHDR->d_id = (InFCHS->s_id | 0x07000000L); // R_CTL= FCP_RSP
+ rspHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] responder|last seq| xfer S.I.
+ rspHDR->f_ctl = 0x08910000L;
+ rspHDR->seq_cnt = 0x03000000; // sequence ID
+ rspHDR->ox_rx_id = InFCHS->ox_rx_id; // gives us OX_ID
+ rspHDR->ro = 0x0L; // relative offset (n/a)
+
+
+ // Now setup the SEST entry
+
+ pTWE = &fcChip->SEST->u[ *fcExchangeIndex ].TWE;
+
+ // fill out the TWE:
+
+ // VALid entry:Dir outbound:enable CM:enal INT:
+ pTWE->Seq_Accum = 0xC4000000L; // upper word flags
+ pTWE->reserved = 0L;
+ pTWE->Remote_Node_ID = 0L; // no more auto RSP frame! (TL/TS change)
+ pTWE->Remote_Node_ID |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID
+
+
+ // Do we need local or extended gather list?
+ // depends on size - we can handle 3 len/addr pairs
+ // locally.
+
+ fcp_dl = build_SEST_sgList(
+ &pTWE->SLen1,
+ Cmnd, // S/G list
+ &sgPairs, // return # of pairs in S/G list (from "Data" descriptor)
+ &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later)
+
+
+ if( !fcp_dl ) // error building S/G list?
+ {
+ ulStatus = MEMPOOL_FAIL;
+ break; // give up
+ }
+
+ // now that we know the S/G length, build CMND payload
+ build_FCP_payload( Cmnd, (UCHAR*)&CMDfchs->pl[0], type, fcp_dl );
+
+
+ if( sgPairs > 3 ) // need extended s/g list
+ pTWE->Buff_Off = 0x00000000; // extended s/g list, no offset
+ else
+ pTWE->Buff_Off = 0x80000000; // local data, no offset
+
+ pTWE->Buff_Index = 0; // Buff_Index | Link
+ pTWE->Exp_RO = 0;
+ pTWE->Byte_Count = 0; // filled in by TL on err
+ pTWE->reserved_ = 0;
+ pTWE->Exp_Byte_Cnt = fcp_dl;// sum of scatter buffers
+
+ break;
+
+
+
+
+
+
+ case SCSI_TRE: // TachLite Target Read Entry
+
+ // It doesn't make much sense for us to "time-out" a READ,
+ // but we'll use it for design consistency and internal error recovery.
+ Exchanges->fcExchange[ *fcExchangeIndex].timeOut = 10; // per SCSI req.
+
+ // I/O request block settings...
+ *pIRB_flags = 0; // clear IRB flags
+ // check PRLI (process login) info
+ // to see if Initiator Requires XFER_RDY
+ // if not, don't send one!
+ // { PRLI check...}
+ IRB_flags.SFA = 0; // don't send XFER_RDY - start data
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += (32L + 12L);// add SFS len (header & XFER_RDY payload)
+
+
+
+ // now, fill out FCP-DATA header
+ // (use buffer inside SEST object)
+ dataHDR = &fcChip->SEST->DataHDR[ *fcExchangeIndex ];
+
+ dataHDR->reserved = 0L; // must clear
+ dataHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS,noLCr,no TS
+ dataHDR->d_id = (InFCHS->s_id | 0x01000000L); // R_CTL= FCP_DATA
+ dataHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0
+
+
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] exchg responder, not 1st seq, xfer S.I.
+ // valid RO
+ dataHDR->f_ctl = 0x08810008L;
+ dataHDR->seq_cnt = 0x01000000; // sequence ID (no XRDY)
+ dataHDR->ox_rx_id = InFCHS->ox_rx_id & 0xFFFF0000; // we want upper 16 bits
+ dataHDR->ro = 0x0L; // relative offset (n/a)
+
+ // now, fill out FCP-RSP header
+ // (use buffer inside SEST object)
+ rspHDR = &fcChip->SEST->RspHDR[ *fcExchangeIndex ];
+
+ rspHDR->reserved = 0L; // must clear
+ rspHDR->sof_eof = 0x75000000L; // SOFi3:EOFn no UAM; no CLS, noLCr, no TS
+ rspHDR->d_id = (InFCHS->s_id | 0x07000000L); // R_CTL= FCP_RSP
+ rspHDR->s_id = fcChip->Registers.my_al_pa; // CS_CTL = 0
+ // TYPE[31-24] 8 for FCP SCSI
+ // f_ctl[23:0] responder|last seq| xfer S.I.
+ rspHDR->f_ctl = 0x08910000L;
+ rspHDR->seq_cnt = 0x02000000; // sequence ID: df_ctl: sequence count
+
+ rspHDR->ro = 0x0L; // relative offset (n/a)
+
+
+ // Now setup the SEST entry
+ pTRE = &fcChip->SEST->u[ *fcExchangeIndex ].TRE;
+
+
+ // VALid entry:Dir outbound:enable CM:enal INT:
+ pTRE->Hdr_Len = 0x86010020L; // data frame Len always 32 bytes
+ pTRE->Hdr_Addr = virt_to_bus( dataHDR );
+ pTRE->RSP_Len = 64L; // hdr+data (TL assisted RSP frame)
+ pTRE->RSP_Len |= (InFCHS->s_id << 8); // MS 24 bits Remote_ID
+ pTRE->RSP_Addr = virt_to_bus( rspHDR );
+
+
+ // Do we need local or extended gather list?
+ // depends on size - we can handle 3 len/addr pairs
+ // locally.
+
+ fcp_dl = build_SEST_sgList(
+ &pTRE->GLen1,
+ Cmnd, // S/G list
+ &sgPairs, // return # of pairs in S/G list (from "Data" descriptor)
+ &fcChip->SEST->sgPages[ *fcExchangeIndex ]);// (for Freeing later)
+
+
+ if( !fcp_dl ) // error building S/G list?
+ {
+ ulStatus = MEMPOOL_FAIL;
+ break; // give up
+ }
+
+ // no payload or command to build -- READ doesn't need XRDY
+
+
+ if( sgPairs > 3 ) // need extended s/g list
+ pTRE->Buff_Off = 0x78000000L; // extended data | (no offset)
+ else // local data pointers (in SEST)
+ pTRE->Buff_Off = 0xf8000000L; // local data | (no offset)
+
+ // ULONG 5
+ pTRE->Buff_Index = 0L; // Buff_Index | reserved
+ pTRE->reserved = 0x0L; // DWord 6
+
+ // DWord 7: NOTE: zero length will
+ // hang TachLite!
+ pTRE->Data_Len = fcp_dl; // e.g. sum of scatter buffers
+
+ pTRE->reserved_ = 0L; // DWord 8
+ pTRE->reserved__ = 0L; // DWord 9
+
+ break;
+
+
+
+
+
+
+
+ case FCP_RESPONSE:
+ // Target response frame: this sequence uses an OX/RX ID
+ // pair from a completed SEST exchange. We built most
+ // of the response frame when we created the TWE/TRE.
+
+ *pIRB_flags = 0; // clear IRB flags
+ IRB_flags.SFA = 1; // send SFS (RSP)
+ SfsLen = *pIRB_flags;
+
+ SfsLen <<= 24; // shift flags to MSB
+ SfsLen += sizeof(TachFCHDR_RSP);// add SFS len (header & RSP payload)
+
+
+ Exchanges->fcExchange[ *fcExchangeIndex].type =
+ FCP_RESPONSE; // change Exchange type to "response" phase
+
+ // take advantage of prior knowledge of OX/RX_ID pair from
+ // previous XFER outbound frame (still in fchs of exchange)
+ fcChip->SEST->RspHDR[ *fcExchangeIndex ].ox_rx_id =
+ CMDfchs->ox_rx_id;
+
+ // Check the status of the DATA phase of the exchange so we can report
+ // status to the initiator
+ buildFCPstatus( fcChip, *fcExchangeIndex); // set RSP payload fields
+
+ memcpy(
+ CMDfchs, // re-use same XFER fchs for Response frame
+ &fcChip->SEST->RspHDR[ *fcExchangeIndex ],
+ sizeof( TachFCHDR_RSP ));
+
+
+ break;
+
+ default:
+ printk("cpqfcTS: don't know how to build FC type: %Xh(%d)\n", type,type);
+ break;
+
+ }
+
+
+
+ if( !ulStatus) // no errors above?
+ {
+ // FCHS is built; now build IRB
+
+ // link the just built FCHS (the "command") to the IRB entry
+ // for this Exchange.
+ pIRB = &Exchanges->fcExchange[ *fcExchangeIndex].IRB;
+
+ // len & flags according to command type above
+ pIRB->Req_A_SFS_Len = SfsLen; // includes IRB flags & len
+ pIRB->Req_A_SFS_Addr = virt_to_bus(CMDfchs); // TL needs physical addr
+ // of frame to send
+ pIRB->Req_A_SFS_D_ID = CMDfchs->d_id << 8; // Dest_ID must be consistent!
+
+ // Exchange is complete except for "fix-up" fields to be set
+ // at Tachyon Queuing time:
+ // IRB->Req_A_Trans_ID (OX_ID/ RX_ID):
+ // for SEST entry, lower bits correspond to actual FC Exchange ID
+ // fchs->OX_ID or RX_ID
+ }
+ else
+ {
+#ifdef DBG
+ printk( "FC Error: SEST build Pool Allocation failed\n");
+#endif
+ // return resources...
+ cpqfcTSCompleteExchange( fcChip, *fcExchangeIndex); // SEST build failed
+ }
+ }
+ else // no Exchanges available
+ {
+ ulStatus = SEST_FULL;
+ printk( "FC Error: no fcExchanges available\n");
+ }
+ return ulStatus;
+}
+
+
+
+
+
+
+// set RSP payload fields
+static void buildFCPstatus( PTACHYON fcChip, ULONG ExchangeID)
+{
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ FC_EXCHANGE *pExchange = &Exchanges->fcExchange[ExchangeID]; // shorthand
+ PFCP_STATUS_RESPONSE pFcpStatus;
+
+ memset( &fcChip->SEST->RspHDR[ ExchangeID ].pl, 0,
+ sizeof( FCP_STATUS_RESPONSE) );
+ if( pExchange->status ) // something wrong?
+ {
+ pFcpStatus = (PFCP_STATUS_RESPONSE) // cast RSP buffer for this xchng
+ &fcChip->SEST->RspHDR[ ExchangeID ].pl;
+ if( pExchange->status & COUNT_ERROR )
+ {
+
+ // set FCP response len valid (so we can report count error)
+ pFcpStatus->fcp_status |= FCP_RSP_LEN_VALID;
+ pFcpStatus->fcp_rsp_len = 0x04000000; // 4 byte len (BIG Endian)
+
+ pFcpStatus->fcp_rsp_info = FCP_DATA_LEN_NOT_BURST_LEN; // RSP_CODE
+ }
+ }
+}
+
+
+
+
+// This routine builds scatter/gather lists into SEST entries
+// INPUTS:
+// SESTalPair - SEST address @DWordA "Local Buffer Length"
+// sgList - Scatter/Gather linked list of Len/Address data buffers
+// OUTPUT:
+// sgPairs - number of valid address/length pairs
+// Remarks:
+// The SEST data buffer pointers only depend on number of
+// length/ address pairs, NOT on the type (IWE, TRE,...)
+// Up to 3 pairs can be referenced in the SEST - more than 3
+// require this Extended S/G list page. The page holds 4, 8, 16...
+// len/addr pairs, per Scatter/Gather List Page Length Reg.
+// TachLite allows pages to be linked to any depth.
+
+//#define DBG_SEST_SGLIST 1 // for printing out S/G pairs with Ext. pages
+
+static ULONG build_SEST_sgList(
+ ULONG *SESTalPairStart, // the 3 len/address buffers in SEST
+ Scsi_Cmnd *Cmnd,
+ ULONG *sgPairs,
+ PSGPAGES sgPages) // link list of TL Ext. S/G pages from O/S Pool
+
+{
+ ULONG i, AllocatedPages=0; // Tach Ext. S/G page allocations
+ ULONG* alPair = SESTalPairStart;
+ ULONG alignedPageAddress; // TL hardware alignment requirement
+ int PairCount;
+ unsigned long ulBuff;
+ ULONG total_data_len=0; // (in bytes)
+ ULONG bytes_to_go = Cmnd->request_bufflen; // total xfer (S/G sum)
+ ULONG thisMappingLen;
+ struct scatterlist *sgl; // S/G list (Linux format)
+
+
+
+ if( !Cmnd->use_sg ) // no S/G list?
+ {
+ *sgPairs = 1; // use "local" S/G pair in SEST entry
+ // (for now, ignore address bits above #31)
+ *alPair++ = bytes_to_go & 0x7ffff; // bits 18-0, length
+ ulBuff = virt_to_bus( Cmnd->request_buffer);
+#if BITS_PER_LONG > 32
+ if( ulBuff >>32 )
+ {
+ printk("FATAL! Tachyon DMA address %p exceeds 32 bits\n", (void*)ulBuff );
+ return 0;
+ }
+#endif
+ *alPair = (ULONG)ulBuff;
+ return bytes_to_go;
+ }
+
+
+ // [TBD - update for Linux to support > 32 bits addressing]
+ // since the format for local & extended S/G lists is different,
+ // check if S/G pairs exceeds 3.
+ *sgPairs = Cmnd->use_sg;
+ sgl = (struct scatterlist*)Cmnd->request_buffer;
+
+ if( *sgPairs <= 3 ) // need "local" SEST list
+ {
+ while( bytes_to_go)
+ {
+ thisMappingLen = sgl->length; // we want them ALL on every pass
+ bytes_to_go = bytes_to_go - thisMappingLen;
+
+ // we have L/A pair; L = thisMappingLen, A = physicalAddress
+ // load into SEST...
+ total_data_len += thisMappingLen & 0x7ffff; // mask in valid bits
+ // per SEST format
+ *alPair = thisMappingLen & 0x7ffff; // bits 18-0, length
+// physicalAddress.HighPart <= 19; // shift to bit 19
+
+ // pick up bits 44-32 of upper 64-bit address
+ // and load into 31-19 LBAU (upper addr) of SEST entry
+// *alPair++ |=(ULONG)((physicalAddress.HighPart & 0xFFF8));
+ // on Tachlite TS's local S/G, we can handle 13 extra address bits
+ // i.e., bits 31-19 are actually bits 44-32 of physicalAddress
+
+ alPair++;
+
+ ulBuff = virt_to_bus( sgl->address);
+#if BITS_PER_LONG > 32
+ if( ulBuff >>32 )
+ {
+ printk("cqpfcTS: Tach DMA address %p > 32 bits\n", (void*)ulBuff );
+ return 0;
+ }
+#endif
+ *alPair++ = (ULONG)ulBuff; // lower 32 bits (31-0)
+
+ ++sgl; // next S/G pair
+#ifdef DBG_SEST_SGLIST
+ printk(" thisLen %d ", thisMappingLen);
+ printk(" remain %d\n", bytes_to_go);
+#endif
+
+ }
+ }
+
+
+
+
+ else // more than 3 pairs requires Extended S/G page (Pool Allocation)
+ {
+ // clear out SEST DWORDs (local S/G addr) C-F (A-B set in following logic)
+
+
+
+ for( i=2; i<6; i++)
+ alPair[i] = 0;
+
+ PairCount = TL_EXT_SG_PAGE_COUNT; // forces initial page allocation
+
+ while( bytes_to_go )
+ {
+
+
+ // Per SEST format, we can support 524287 byte lenghts per
+ // S/G pair. Typical user buffers are 4k, and very rarely
+ // exceed 12k due to fragmentation of physical memory pages.
+ // However, on certain O/S system (not "user") buffers (on platforms
+ // with huge memories like 256Meg), it's possible to exceed this
+ // length in a single S/G address/len mapping.
+ //
+ // Check for Tachyon length boundary
+ //
+ if( sgl->length > 0x7ffff )
+ {
+ // never ask for more than we can handle
+ thisMappingLen = sgl->length & 0x7ffff;
+ }
+ else
+ thisMappingLen = sgl->length;
+
+
+
+ // should we load into "this" extended S/G page, or allocate
+ // new page?
+
+ if( PairCount >= TL_EXT_SG_PAGE_COUNT )
+ {
+ // have we exceeded the max possible extended pages?
+ if( AllocatedPages >= TL_MAX_SGPAGES)
+ {
+ printk("Error: aborted loop on %d Ext. S/G page allocations\n",
+ AllocatedPages);
+
+ total_data_len = 0; // failure!! Ext. S/G is All-or-none affair
+ break; // failed
+ }
+
+ // Allocate the TL Extended S/G list page from O/S pool. We have
+ // to allocated twice what we want to ensure required TL alignment
+ // (Tachlite TL/TS User Man. Rev 6.0, p 168)
+ // We store the original allocated PVOID so we can free later
+
+ sgPages->PoolPage[ AllocatedPages] =
+ kmalloc( TL_EXT_SG_PAGE_BYTELEN*2,GFP_ATOMIC); // double for alignment
+
+
+ if( !sgPages->PoolPage[ AllocatedPages] ) // Allocation failed?
+ {
+
+ printk("Error: Allocation failed @ %d S/G page allocations\n",
+ AllocatedPages);
+
+ total_data_len = 0; // failure!! Ext. S/G is All-or-none affair
+ break; // give up
+ }
+ // clear out memory we just allocated
+ memset( sgPages->PoolPage[AllocatedPages], 0,
+ TL_EXT_SG_PAGE_BYTELEN*2);
+
+
+ // align the memory - TL requires sizeof() Ext. S/G page alignment.
+ // We doubled the actual required size so we could mask off LSBs
+ // to get desired offset
+
+ ulBuff = virt_to_bus( sgPages->PoolPage[AllocatedPages]);
+
+#if BITS_PER_LONG > 32
+ if( ulBuff >>32 )
+ {
+ printk("cqpfcTS: Tach ext. S/G DMA address %p > 32 bits\n",
+ (void*)ulBuff );
+ return 0;
+ }
+#endif
+
+ ulBuff += TL_EXT_SG_PAGE_BYTELEN; // ensures we pass align. boundary
+ ulBuff &= (0xFFFFFFFF - (TL_EXT_SG_PAGE_BYTELEN -1) );// mask off LSBs
+
+ alignedPageAddress = (ULONG)ulBuff;
+#ifdef DBG_SEST_SGLIST
+ printk("new PoolPage: %p, alignedPageAddress %lXh\n",
+ sgPages->PoolPage[AllocatedPages], ulBuff);
+#endif
+
+
+ // set pointer, in SEST if first Ext. S/G page, or in last pair
+ // of linked Ext. S/G pages...
+ // (Only 32-bit PVOIDs, so just load lower 32 bits)
+ // NOTE: the Len field must be '0' if this is the first Ext. S/G
+ // pointer in SEST, and not 0 otherwise.
+ if( alPair == SESTalPairStart) // initial Ext. S/G list?
+ *alPair = 0;
+ else // not the SEST entry... Len must be non-0, so
+ // arbitrarily set it to number bytes remaining
+ *alPair = ( bytes_to_go & 0x7ffff);
+
+#ifdef DBG_SEST_SGLIST
+ printk("PairCount %d @%p even %Xh, ",
+ PairCount, alPair, *alPair);
+#endif
+ alPair++; // next DWORD
+
+ *alPair = alignedPageAddress; // TL needs 32-bit physical
+#ifdef DBG_SEST_SGLIST
+ printk("odd %Xh\n", *alPair);
+#endif
+
+ // now reset the pointer to the ACTUAL (Extended) S/G page
+ // which will accept the Len/ PhysicalAddress pairs
+ alPair = bus_to_virt(alignedPageAddress);
+
+ AllocatedPages++;
+ PairCount = 1; // starting new Ext. S/G page
+ } // end of new TL Ext. S/G page allocation
+
+
+ *alPair = thisMappingLen; // bits 18-0, length (range check above)
+
+
+// physicalAddress.HighPart <= 19; // shift to bit 19
+
+ // pick up bits 44-32 of upper 64-bit address
+ // and load into 31-19 LBAU (upper addr) of SEST entry
+// *alPair |=(ULONG)((physicalAddress.HighPart & 0xFFF8));
+
+
+#ifdef DBG_SEST_SGLIST
+ printk("PairCount %d @%p, even %Xh, ",
+ PairCount, alPair, *alPair);
+#endif
+
+ alPair++; // next DWORD
+ // on Tachlite TS's local S/G, we can handle 13 extra address bits
+ // i.e., bits 31-19 are actually bits 44-32 of physicalAddress
+
+
+ ulBuff = virt_to_bus( sgl->address);
+#if BITS_PER_LONG > 32
+ if( ulBuff >>32 )
+ {
+ printk("cqpfcTS: Tach DMA address %p > 32 bits\n", (void*)ulBuff );
+ return 0;
+ }
+#endif
+ *alPair = (ULONG)ulBuff; // lower 32 bits (31-0)
+
+
+#ifdef DBG_SEST_SGLIST
+ printk("odd %Xh\n", *alPair);
+#endif
+ alPair++; // next DWORD
+
+
+ PairCount++; // next Length/Address pair
+ bytes_to_go -= thisMappingLen;
+ total_data_len += thisMappingLen;
+ sgl++; // next S/G pair
+ }
+ }
+ return total_data_len;
+}
+
+
+
+// The Tachlite SEST table is referenced to OX_ID (or RX_ID). To optimize
+// performance and debuggability, we index the Exchange structure to FC X_ID
+// This enables us to build exchanges for later en-queing to Tachyon,
+// provided we have an open X_ID slot. At Tachyon queing time, we only
+// need an ERQ slot; then "fix-up" references in the
+// IRB, FCHS, etc. as needed.
+// RETURNS:
+// 0 if successful
+// non-zero on error
+//sstartex
+ULONG cpqfcTSStartExchange(
+ CPQFCHBA *cpqfcHBAdata,
+ LONG ExchangeID )
+{
+ PTACHYON fcChip = &cpqfcHBAdata->fcChip;
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ FC_EXCHANGE *pExchange = &Exchanges->fcExchange[ ExchangeID ]; // shorthand
+ USHORT producer, consumer;
+ ULONG ulStatus=0;
+ short int ErqIndex;
+ BOOLEAN CompleteExchange = FALSE; // e.g. ACC replies are complete
+ BOOLEAN SestType=FALSE;
+ ULONG InboundData=0;
+
+ // We will manipulate Tachlite chip registers here to successfully
+ // start exchanges.
+
+ // Check that link is not down -- we can't start an exchange on a
+ // down link!
+
+ if( fcChip->Registers.FMstatus.value & 0x80) // LPSM offline?
+ {
+printk("fcStartExchange: PSM offline (%Xh), x_ID %Xh, type %Xh, port_id %Xh\n",
+ fcChip->Registers.FMstatus.value & 0xFF,
+ ExchangeID,
+ pExchange->type,
+ pExchange->fchs.d_id);
+
+ if( ExchangeID >= TACH_SEST_LEN ) // Link Service Outbound frame?
+ {
+ // Our most popular LinkService commands are port discovery types
+ // (PLOGI/ PDISC...), which are implicitly nullified by Link Down
+ // events, so it makes no sense to Que them. However, ABTS should
+ // be queued, since exchange sequences are likely destroyed by
+ // Link Down events, and we want to notify other ports of broken
+ // sequences by aborting the corresponding exchanges.
+ if( pExchange->type != BLS_ABTS )
+ {
+ ulStatus = LNKDWN_OSLS;
+ goto Done;
+ // don't Que most LinkServ exchanges on LINK DOWN
+ }
+ }
+
+ printk("fcStartExchange: Que x_ID %Xh, type %Xh\n",
+ ExchangeID, pExchange->type);
+ pExchange->status |= EXCHANGE_QUEUED;
+ ulStatus = EXCHANGE_QUEUED;
+ goto Done;
+ }
+
+ // Make sure ERQ has available space.
+
+ producer = (USHORT)fcChip->ERQ->producerIndex; // copies for logical arith.
+ consumer = (USHORT)fcChip->ERQ->consumerIndex;
+ producer++; // We are testing for full que by incrementing
+
+ if( producer >= ERQ_LEN ) // rollover condition?
+ producer = 0;
+ if( consumer != producer ) // ERQ not full?
+ {
+ // ****************** Need Atomic access to chip registers!!********
+
+ // remember ERQ PI for copying IRB
+ ErqIndex = (USHORT)fcChip->ERQ->producerIndex;
+ fcChip->ERQ->producerIndex = producer; // this is written to Tachyon
+ // we have an ERQ slot! If SCSI command, need SEST slot
+ // otherwise we are done.
+
+ // Note that Tachyon requires that bit 15 of the OX_ID or RX_ID be
+ // set according to direction of data to/from Tachyon for SEST assists.
+ // For consistency, enforce this rule for Link Service (non-SEST)
+ // exchanges as well.
+
+ // fix-up the X_ID field in IRB
+ pExchange->IRB.Req_A_Trans_ID = ExchangeID & 0x7FFF; // 15-bit field
+
+ // fix-up the X_ID field in fchs -- depends on Originator or Responder,
+ // outgoing or incoming data?
+ switch( pExchange->type )
+ {
+ // ORIGINATOR types... we're setting our OX_ID and
+ // defaulting the responder's RX_ID to 0xFFFF
+
+ case SCSI_IRE:
+ // Requirement: set MSB of x_ID for Incoming TL data
+ // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50)
+ InboundData = 0x8000;
+
+ case SCSI_IWE:
+ SestType = TRUE;
+ pExchange->fchs.ox_rx_id = (ExchangeID | InboundData);
+ pExchange->fchs.ox_rx_id <<= 16; // MSW shift
+ pExchange->fchs.ox_rx_id |= 0xffff; // add default RX_ID
+
+ // now fix-up the Data HDR OX_ID (TL automatically does rx_id)
+ // (not necessary for IRE -- data buffer unused)
+ if( pExchange->type == SCSI_IWE)
+ {
+ fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id =
+ pExchange->fchs.ox_rx_id;
+
+ }
+
+ break;
+
+
+ case FCS_NSR: // ext. link service Name Service Request
+ case ELS_SCR: // ext. link service State Change Registration
+ case ELS_FDISC:// ext. link service login
+ case ELS_FLOGI:// ext. link service login
+ case ELS_LOGO: // FC-PH extended link service logout
+ case BLS_NOP: // Basic link service No OPeration
+ case ELS_PLOGI:// ext. link service login (PLOGI)
+ case ELS_PDISC:// ext. link service login (PDISC)
+ case ELS_PRLI: // ext. link service process login
+
+ pExchange->fchs.ox_rx_id = ExchangeID;
+ pExchange->fchs.ox_rx_id <<= 16; // MSW shift
+ pExchange->fchs.ox_rx_id |= 0xffff; // and RX_ID
+
+ break;
+
+
+
+
+ // RESPONDER types... we must set our RX_ID while preserving
+ // sender's OX_ID
+ // outgoing (or no) data
+ case ELS_RJT: // extended link service reject
+ case ELS_LOGO_ACC: // FC-PH extended link service logout accept
+ case ELS_ACC: // ext. generic link service accept
+ case ELS_PLOGI_ACC:// ext. link service login accept (PLOGI or PDISC)
+ case ELS_PRLI_ACC: // ext. link service process login accept
+
+ CompleteExchange = TRUE; // Reply (ACC or RJT) is end of exchange
+ pExchange->fchs.ox_rx_id |= (ExchangeID & 0xFFFF);
+
+ break;
+
+
+ // since we are a Responder, OX_ID should already be set by
+ // cpqfcTSBuildExchange(). We need to -OR- in RX_ID
+ case SCSI_TWE:
+ SestType = TRUE;
+ // Requirement: set MSB of x_ID for Incoming TL data
+ // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50)
+
+ pExchange->fchs.ox_rx_id &= 0xFFFF0000; // clear RX_ID
+ // Requirement: set MSB of RX_ID for Incoming TL data
+ // (see "Tachyon TL/TS User's Manual", Rev 6.0, Sept.'98, pg. 50)
+ pExchange->fchs.ox_rx_id |= (ExchangeID | 0x8000);
+ break;
+
+
+ case SCSI_TRE:
+ SestType = TRUE;
+
+ // there is no XRDY for SEST target read; the data
+ // header needs to be updated. Also update the RSP
+ // exchange IDs for the status frame, in case it is sent automatically
+ fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id |= ExchangeID;
+ fcChip->SEST->RspHDR[ ExchangeID ].ox_rx_id =
+ fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id;
+
+ // for easier FCP response logic (works for TWE and TRE),
+ // copy exchange IDs. (Not needed if TRE 'RSP' bit set)
+ pExchange->fchs.ox_rx_id =
+ fcChip->SEST->DataHDR[ ExchangeID ].ox_rx_id;
+
+ break;
+
+
+ case FCP_RESPONSE: // using existing OX_ID/ RX_ID pair,
+ // start SFS FCP-RESPONSE frame
+ // OX/RX_ID should already be set! (See "fcBuild" above)
+ CompleteExchange = TRUE; // RSP is end of FCP-SCSI exchange
+
+
+ break;
+
+
+ case BLS_ABTS_RJT: // uses new RX_ID, since SEST x_ID non-existent
+ case BLS_ABTS_ACC: // using existing OX_ID/ RX_ID pair from SEST entry
+ CompleteExchange = TRUE; // ACC or RJT marks end of FCP-SCSI exchange
+ case BLS_ABTS: // using existing OX_ID/ RX_ID pair from SEST entry
+
+
+ break;
+
+
+ default:
+ printk("Error on fcStartExchange: undefined type %Xh(%d)\n",
+ pExchange->type, pExchange->type);
+ return INVALID_ARGS;
+ }
+
+
+ // X_ID fields are entered -- copy IRB to Tachyon's ERQ
+
+
+ memcpy(
+ &fcChip->ERQ->QEntry[ ErqIndex ], // dest.
+ &pExchange->IRB,
+ 32); // fixed (hardware) length!
+
+ PCI_TRACEO( ExchangeID, 0xA0)
+
+ // ACTION! May generate INT and IMQ entry
+ writel( fcChip->ERQ->producerIndex,
+ fcChip->Registers.ERQproducerIndex.address);
+
+
+ if( ExchangeID >= TACH_SEST_LEN ) // Link Service Outbound frame?
+ {
+
+ // wait for completion! (TDB -- timeout and chip reset)
+
+
+ PCI_TRACEO( ExchangeID, 0xA4)
+
+ enable_irq( cpqfcHBAdata->HostAdapter->irq); // only way to get Sem.
+
+ down_interruptible( cpqfcHBAdata->TYOBcomplete);
+
+ disable_irq( cpqfcHBAdata->HostAdapter->irq);
+ PCI_TRACE( 0xA4)
+
+ // On login exchanges, BAD_ALPA (non-existent port_id) results in
+ // FTO (Frame Time Out) on the Outbound Completion message.
+ // If we got an FTO status, complete the exchange (free up slot)
+ if( CompleteExchange || // flag from Reply frames
+ pExchange->status ) // typically, can get FRAME_TO
+ {
+ cpqfcTSCompleteExchange( fcChip, ExchangeID);
+ }
+ }
+
+ else // SEST Exchange
+ {
+ ulStatus = 0; // ship & pray success (e.g. FCP-SCSI)
+
+ if( CompleteExchange ) // by Type of exchange (e.g. end-of-xchng)
+ {
+ cpqfcTSCompleteExchange( fcChip, ExchangeID);
+ }
+
+ else
+ pExchange->status &= ~EXCHANGE_QUEUED; // clear ExchangeQueued flag
+
+ }
+ }
+
+
+ else // ERQ 'producer' = 'consumer' and QUE is full
+ {
+ ulStatus = OUTQUE_FULL; // Outbound (ERQ) Que full
+ }
+
+Done:
+ PCI_TRACE( 0xA0)
+ return ulStatus;
+}
+
+
+
+
+
+// Scan fcController->fcExchanges array for a usuable index (a "free"
+// exchange).
+// Inputs:
+// fcChip - pointer to TachLite chip structure
+// Return:
+// index - exchange array element where exchange can be built
+// -1 - exchange array is full
+// REMARKS:
+// Although this is a (yuk!) linear search, we presume
+// that the system will complete exchanges about as quickly as
+// they are submitted. A full Exchange array (and hence, max linear
+// search time for free exchange slot) almost guarantees a Fibre problem
+// of some sort.
+// In the interest of making exchanges easier to debug, we want a LRU
+// (Least Recently Used) scheme.
+
+
+static LONG FindFreeExchange( PTACHYON fcChip, ULONG type )
+{
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ ULONG i;
+ ULONG ulStatus=-1; // assume failure
+
+
+ if( type == SCSI_IRE ||
+ type == SCSI_TRE ||
+ type == SCSI_IWE ||
+ type == SCSI_TWE)
+ {
+ // SCSI type - X_IDs should be from 0 to TACH_SEST_LEN-1
+ if( fcChip->fcSestExchangeLRU >= TACH_SEST_LEN) // rollover?
+ fcChip->fcSestExchangeLRU = 0;
+ i = fcChip->fcSestExchangeLRU; // typically it's already free!
+
+ if( Exchanges->fcExchange[i].type == 0 ) // check for "free" element
+ {
+ ulStatus = 0; // success!
+ }
+
+ else
+ { // YUK! we need to do a linear search for free element.
+ // Fragmentation of the fcExchange array is due to excessively
+ // long completions or timeouts.
+
+ while( TRUE )
+ {
+ if( ++i >= TACH_SEST_LEN ) // rollover check
+ i = 0; // beginning of SEST X_IDs
+
+// printk( "looping for SCSI xchng ID: i=%d, type=%Xh\n",
+// i, Exchanges->fcExchange[i].type);
+
+ if( Exchanges->fcExchange[i].type == 0 ) // "free"?
+ {
+ ulStatus = 0; // success!
+ break;
+ }
+ if( i == fcChip->fcSestExchangeLRU ) // wrapped-around array?
+ {
+ printk( "SEST X_ID space full\n");
+ break; // failed - prevent inf. loop
+ }
+ }
+ }
+ fcChip->fcSestExchangeLRU = i + 1; // next! (rollover check next pass)
+ }
+
+
+
+ else // Link Service type - X_IDs should be from TACH_SEST_LEN
+ // to TACH_MAX_XID
+ {
+ if( fcChip->fcLsExchangeLRU >= TACH_MAX_XID || // range check
+ fcChip->fcLsExchangeLRU < TACH_SEST_LEN ) // (e.g. startup)
+ fcChip->fcLsExchangeLRU = TACH_SEST_LEN;
+
+ i = fcChip->fcLsExchangeLRU; // typically it's already free!
+ if( Exchanges->fcExchange[i].type == 0 ) // check for "free" element
+ {
+ ulStatus = 0; // success!
+ }
+
+ else
+ { // YUK! we need to do a linear search for free element
+ // Fragmentation of the fcExchange array is due to excessively
+ // long completions or timeouts.
+
+ while( TRUE )
+ {
+ if( ++i >= TACH_MAX_XID ) // rollover check
+ i = TACH_SEST_LEN;// beginning of Link Service X_IDs
+
+// printk( "looping for xchng ID: i=%d, type=%Xh\n",
+// i, Exchanges->fcExchange[i].type);
+
+ if( Exchanges->fcExchange[i].type == 0 ) // "free"?
+ {
+ ulStatus = 0; // success!
+ break;
+ }
+ if( i == fcChip->fcLsExchangeLRU ) // wrapped-around array?
+ {
+ printk( "LinkService X_ID space full\n");
+ break; // failed - prevent inf. loop
+ }
+ }
+ }
+ fcChip->fcLsExchangeLRU = i + 1; // next! (rollover check next pass)
+
+ }
+
+ if( !ulStatus ) // success?
+ Exchanges->fcExchange[i].type = type; // allocate it.
+
+ else
+ i = -1; // error - all exchanges "open"
+
+ return i;
+}
+
+
+
+
+
+// We call this routine to free an Exchange for any reason:
+// completed successfully, completed with error, aborted, etc.
+
+// returns FALSE if Exchange failed and "retry" is acceptable
+// returns TRUE if Exchange was successful, or retry is impossible
+// (e.g. port/device gone).
+//scompleteexchange
+
+void cpqfcTSCompleteExchange(
+ PTACHYON fcChip,
+ ULONG x_ID)
+{
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+
+ if( x_ID < TACH_SEST_LEN ) // SEST-based (or LinkServ for FCP exchange)
+ {
+ if( Exchanges->fcExchange[ x_ID ].Cmnd == NULL ) // what#@!
+ {
+// TriggerHBA( fcChip->Registers.ReMapMemBase, 0);
+ printk(" x_ID %Xh, type %Xh, NULL ptr!\n", x_ID,
+ Exchanges->fcExchange[ x_ID ].type);
+
+ goto CleanUpSestResources; // this path should be very rare.
+ }
+
+ // we have Linux Scsi Cmnd ptr..., now check our Exchange status
+ // to decide how to complete this SEST FCP exchange
+
+ if( Exchanges->fcExchange[ x_ID ].status ) // perhaps a Tach indicated problem,
+ // or abnormal exchange completion
+ {
+ // set FCP Link statistics
+
+ if( Exchanges->fcExchange[ x_ID ].status & FC2_TIMEOUT)
+ fcChip->fcStats.timeouts++;
+ if( Exchanges->fcExchange[ x_ID ].status & INITIATOR_ABORT)
+ fcChip->fcStats.FC4aborted++;
+ if( Exchanges->fcExchange[ x_ID ].status & COUNT_ERROR)
+ fcChip->fcStats.CntErrors++;
+ if( Exchanges->fcExchange[ x_ID ].status & LINKFAIL_TX)
+ fcChip->fcStats.linkFailTX++;
+ if( Exchanges->fcExchange[ x_ID ].status & LINKFAIL_RX)
+ fcChip->fcStats.linkFailRX++;
+ if( Exchanges->fcExchange[ x_ID ].status & OVERFLOW)
+ fcChip->fcStats.CntErrors++;
+
+ // First, see if the Scsi upper level initiated an ABORT on this
+ // exchange...
+ if( Exchanges->fcExchange[ x_ID ].status == INITIATOR_ABORT )
+ {
+ printk(" DID_ABORT, x_ID %Xh, Cmnd %p ",
+ x_ID, Exchanges->fcExchange[ x_ID ].Cmnd);
+ goto CleanUpSestResources; // (we don't expect Linux _aborts)
+ }
+
+ // Did our driver timeout the Exchange, or did Tachyon indicate
+ // a failure during transmission? Ask for retry with "SOFT_ERROR"
+ else if( Exchanges->fcExchange[ x_ID ].status & FC2_TIMEOUT)
+ {
+// printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n",
+// x_ID, Exchanges->fcExchange[ x_ID ].Cmnd);
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16);
+ }
+
+ // Did frame(s) for an open exchange arrive in the SFQ,
+ // meaning the SEST was unable to process them?
+ else if( Exchanges->fcExchange[ x_ID ].status & SFQ_FRAME)
+ {
+// printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n",
+// x_ID, Exchanges->fcExchange[ x_ID ].Cmnd);
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16);
+ }
+
+ // Did our driver timeout the Exchange, or did Tachyon indicate
+ // a failure during transmission? Ask for retry with "SOFT_ERROR"
+ else if(
+ (Exchanges->fcExchange[ x_ID ].status & LINKFAIL_TX) ||
+ (Exchanges->fcExchange[ x_ID ].status & PORTID_CHANGED) ||
+ (Exchanges->fcExchange[ x_ID ].status & FRAME_TO) ||
+ (Exchanges->fcExchange[ x_ID ].status & INV_ENTRY) ||
+ (Exchanges->fcExchange[ x_ID ].status & ABORTSEQ_NOTIFY) )
+
+
+ {
+// printk("result DID_SOFT_ERROR, x_ID %Xh, Cmnd %p\n",
+// x_ID, Exchanges->fcExchange[ x_ID ].Cmnd);
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16);
+
+
+ }
+
+ // e.g., a LOGOut happened, or device never logged back in.
+ else if( Exchanges->fcExchange[ x_ID ].status & DEVICE_REMOVED)
+ {
+// printk(" *LOGOut or timeout on login!* ");
+ // trigger?
+// TriggerHBA( fcChip->Registers.ReMapMemBase, 0);
+
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_BAD_TARGET <<16);
+ }
+
+
+ // Did Tachyon indicate a CNT error? We need further analysis
+ // to determine if the exchange is acceptable
+ else if( Exchanges->fcExchange[ x_ID ].status == COUNT_ERROR)
+ {
+ UCHAR ScsiStatus;
+ FCP_STATUS_RESPONSE *pFcpStatus =
+ (PFCP_STATUS_RESPONSE)&fcChip->SEST->RspHDR[ x_ID ].pl;
+
+ ScsiStatus = pFcpStatus->fcp_status >>24;
+
+ // If the command is a SCSI Read/Write type, we don't tolerate
+ // count errors of any kind; assume the count error is due to
+ // a dropped frame and ask for retry...
+
+ if(( (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x8) ||
+ (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x28) ||
+ (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0xA) ||
+ (Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0] == 0x2A) )
+ &&
+ ScsiStatus == 0 )
+ {
+ // ask for retry
+/* printk("COUNT_ERROR retry, x_ID %Xh, status %Xh, Cmnd %p\n",
+ x_ID, Exchanges->fcExchange[ x_ID ].status,
+ Exchanges->fcExchange[ x_ID ].Cmnd);*/
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_SOFT_ERROR <<16);
+ }
+
+ else // need more analysis
+ {
+ cpqfcTSCheckandSnoopFCP(fcChip, x_ID); // (will set ->result)
+ }
+ }
+
+ // default: NOTE! We don't ever want to get here. Getting here
+ // implies something new is happening that we've never had a test
+ // case for. Need code maintenance! Return "ERROR"
+ else
+ {
+ printk("DEFAULT result %Xh, x_ID %Xh, Cmnd %p\n",
+ Exchanges->fcExchange[ x_ID ].status, x_ID,
+ Exchanges->fcExchange[ x_ID ].Cmnd);
+ Exchanges->fcExchange[ x_ID ].Cmnd->result = (DID_ERROR <<16);
+ }
+ }
+ else // definitely no Tach problem, but perhaps an FCP problem
+ {
+ // set FCP Link statistic
+ fcChip->fcStats.ok++;
+ cpqfcTSCheckandSnoopFCP( fcChip, x_ID); // (will set ->result)
+ }
+
+ // OK, we've set the Scsi "->result" field, so proceed with calling
+ // Linux Scsi "done" (if not NULL), and free any kernel memory we
+ // may have allocated for the exchange.
+
+ PCI_TRACEO( (ULONG)Exchanges->fcExchange[x_ID].Cmnd, 0xAC);
+ // complete the command back to upper Scsi drivers
+ if( Exchanges->fcExchange[ x_ID ].Cmnd->scsi_done != NULL)
+ {
+ // Calling "done" on an Linux _abort() aborted
+ // Cmnd causes a kernel panic trying to re-free mem.
+ // Actually, we shouldn't do anything with an _abort CMND
+ if( Exchanges->fcExchange[ x_ID ].Cmnd->result != (DID_ABORT<<16) )
+ {
+ PCI_TRACE(0xAC)
+ (*Exchanges->fcExchange[ x_ID ].Cmnd->scsi_done)
+ (Exchanges->fcExchange[ x_ID ].Cmnd);
+ }
+ else
+ {
+
+// printk(" not calling scsi_done on x_ID %Xh, Cmnd %p\n",
+// x_ID, Exchanges->fcExchange[ x_ID ].Cmnd);
+ }
+ }
+ else{
+ printk(" x_ID %Xh, type %Xh, Cdb0 %Xh\n", x_ID,
+ Exchanges->fcExchange[ x_ID ].type,
+ Exchanges->fcExchange[ x_ID ].Cmnd->cmnd[0]);
+ printk(" cpqfcTS: Null scsi_done function pointer!\n");
+ }
+
+
+ // Now, clean up non-Scsi_Cmnd items...
+CleanUpSestResources:
+
+ // Was an Extended Scatter/Gather page allocated? We know
+ // this by checking DWORD 4, bit 31 ("LOC") of SEST entry
+ if( !(fcChip->SEST->u[ x_ID ].IWE.Buff_Off & 0x80000000))
+ {
+ int i = 0;
+
+ // extended S/G list was used -- Free the allocated ext. S/G pages
+
+ while( fcChip->SEST->sgPages[x_ID].PoolPage[i] &&
+ (i < TL_MAX_SGPAGES) )
+ {
+ kfree( fcChip->SEST->sgPages[x_ID].PoolPage[i]);
+ fcChip->SEST->sgPages[x_ID].PoolPage[i] = NULL;
+ i++;
+ }
+ }
+
+ Exchanges->fcExchange[ x_ID ].Cmnd = NULL;
+ } // Done with FCP (SEST) exchanges
+
+
+ // the remaining logic is common to ALL Exchanges:
+ // FCP(SEST) and LinkServ.
+
+ Exchanges->fcExchange[ x_ID ].type = 0; // there -- FREE!
+ Exchanges->fcExchange[ x_ID ].status = 0;
+
+ PCI_TRACEO( x_ID, 0xAC)
+
+
+ return;
+} // (END of CompleteExchange function)
+
+
+
+
+// Unfortunately, we must snoop all command completions in
+// order to manipulate certain return fields, and take note of
+// device types, etc., to facilitate the Fibre-Channel to SCSI
+// "mapping".
+// (Watch for BIG Endian confusion on some payload fields)
+void cpqfcTSCheckandSnoopFCP( PTACHYON fcChip, ULONG x_ID)
+{
+ FC_EXCHANGES *Exchanges = fcChip->Exchanges;
+ Scsi_Cmnd *Cmnd = Exchanges->fcExchange[ x_ID].Cmnd;
+ FCP_STATUS_RESPONSE *pFcpStatus =
+ (PFCP_STATUS_RESPONSE)&fcChip->SEST->RspHDR[ x_ID ].pl;
+ UCHAR ScsiStatus;
+
+ ScsiStatus = pFcpStatus->fcp_status >>24;
+
+#ifdef FCP_COMPLETION_DBG
+ printk("ScsiStatus = 0x%X\n", ScsiStatus);
+#endif
+
+ // First, check FCP status
+ if( pFcpStatus->fcp_status & FCP_RSP_LEN_VALID )
+ {
+ // check response code (RSP_CODE) -- most popular is bad len
+ // 1st 4 bytes of rsp info -- only byte 3 interesting
+ if( pFcpStatus->fcp_rsp_info & FCP_DATA_LEN_NOT_BURST_LEN )
+ {
+
+ // do we EVER get here?
+ printk("cpqfcTS: FCP data len not burst len, x_ID %Xh\n", x_ID);
+ }
+ }
+
+ // for now, go by the ScsiStatus, and manipulate certain
+ // commands when necessary...
+ if( ScsiStatus == 0) // SCSI status byte "good"?
+ {
+ Cmnd->result = 0; // everything's OK
+
+ if( (Cmnd->cmnd[0] == INQUIRY))
+ {
+ UCHAR *InquiryData = Cmnd->request_buffer;
+ PFC_LOGGEDIN_PORT pLoggedInPort;
+
+ // We need to manipulate INQUIRY
+ // strings for COMPAQ RAID controllers to force
+ // Linux to scan additional LUNs. Namely, set
+ // the Inquiry string byte 2 (ANSI-approved version)
+ // to 2.
+
+ if( !memcmp( &InquiryData[8], "COMPAQ", 6 ))
+ {
+ InquiryData[2] = 0x2; // claim SCSI-2 compliance,
+ // so multiple LUNs may be scanned.
+ // (no SCSI-2 problems known in CPQ)
+ }
+
+ // snoop the Inquiry to detect Disk, Tape, etc. type
+ // (search linked list for the port_id we sent INQUIRY to)
+ pLoggedInPort = fcFindLoggedInPort( fcChip,
+ NULL, // DON'T search Scsi Nexus (we will set it)
+ Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF,
+ NULL, // DON'T search linked list for FC WWN
+ NULL); // DON'T care about end of list
+
+ if( pLoggedInPort )
+ {
+ pLoggedInPort->ScsiNexus.InqDeviceType = InquiryData[0];
+ }
+ else
+ {
+ printk("cpqfcTS: can't find LoggedIn FC port %06X for INQUIRY\n",
+ Exchanges->fcExchange[ x_ID].fchs.d_id & 0xFFFFFF);
+ }
+ }
+ }
+
+
+ // Scsi Status not good -- pass it back to caller
+
+ else
+ {
+ Cmnd->result = ScsiStatus; // SCSI status byte is 1st
+
+ // check for valid "sense" data
+
+ if( pFcpStatus->fcp_status & FCP_SNS_LEN_VALID )
+ { // limit Scsi Sense field length!
+ int SenseLen = pFcpStatus->fcp_sns_len >>24; // (BigEndian) lower byte
+
+ SenseLen = SenseLen > sizeof( Cmnd->sense_buffer) ?
+ sizeof( Cmnd->sense_buffer) : SenseLen;
+
+
+#ifdef FCP_COMPLETION_DBG
+ printk("copy sense_buffer %p, len %d, result %Xh\n",
+ Cmnd->sense_buffer, SenseLen, Cmnd->result);
+#endif
+
+ // NOTE: There is some dispute over the FCP response
+ // format. Most FC devices assume that FCP_RSP_INFO
+ // is 8 bytes long, in spite of the fact that FCP_RSP_LEN
+ // is (virtually) always 0 and the field is "invalid".
+ // Some other devices assume that
+ // the FCP_SNS_INFO begins after FCP_RSP_LEN bytes (i.e. 0)
+ // when the FCP_RSP is invalid (this almost appears to be
+ // one of those "religious" issues).
+ // Consequently, we test the usual position of FCP_SNS_INFO
+ // for 7Xh, since the SCSI sense format says the first
+ // byte ("error code") should be 0x70 or 0x71. In practice,
+ // we find that every device does in fact have 0x70 or 0x71
+ // in the first byte position, so this test works for all
+ // FC devices.
+ // (This logic is especially effective for the CPQ/DEC HSG80
+ // & HSG60 controllers).
+
+ if( (pFcpStatus->fcp_sns_info[0] & 0x70) == 0x70 )
+ memcpy( Cmnd->sense_buffer,
+ &pFcpStatus->fcp_sns_info[0], SenseLen);
+ else
+ {
+ unsigned char *sbPtr =
+ (unsigned char *)&pFcpStatus->fcp_sns_info[0];
+ sbPtr -= 8; // back up 8 bytes hoping to find the
+ // start of the sense buffer
+ memcpy( Cmnd->sense_buffer, sbPtr, SenseLen);
+ }
+
+ // in the special case of Device Reset, tell upper layer
+ // to immediately retry (with SOFT_ERROR status)
+ // look for Sense Key Unit Attention (0x6) with ASC Device
+ // Reset (0x29)
+ // printk("SenseLen %d, Key = 0x%X, ASC = 0x%X\n",
+ // SenseLen, Cmnd->sense_buffer[2],
+ // Cmnd->sense_buffer[12]);
+ if( ((Cmnd->sense_buffer[2] & 0xF) == 0x6) &&
+ (Cmnd->sense_buffer[12] == 0x29) ) // Sense Code "reset"
+ {
+ Cmnd->result |= (DID_SOFT_ERROR << 16); // "Host" status byte 3rd
+ }
+
+ // check for SenseKey "HARDWARE ERROR", ASC InternalTargetFailure
+ else if( ((Cmnd->sense_buffer[2] & 0xF) == 0x4) && // "hardware error"
+ (Cmnd->sense_buffer[12] == 0x44) ) // Addtl. Sense Code
+ {
+// printk("HARDWARE_ERROR, Channel/Target/Lun %d/%d/%d\n",
+// Cmnd->channel, Cmnd->target, Cmnd->lun);
+ Cmnd->result |= (DID_ERROR << 16); // "Host" status byte 3rd
+ }
+
+ } // (end of sense len valid)
+
+ // there is no sense data to help out Linux's Scsi layers...
+ // We'll just return the Scsi status and hope he will "do the
+ // right thing"
+ else
+ {
+ // as far as we know, the Scsi status is sufficient
+ Cmnd->result |= (DID_OK << 16); // "Host" status byte 3rd
+ }
+ }
+}
+
+
+
+//PPPPPPPPPPPPPPPPPPPPPPPPP PAYLOAD PPPPPPPPP
+// build data PAYLOAD; SCSI FCP_CMND I.U.
+// remember BIG ENDIAN payload - DWord values must be byte-reversed
+// (hence the affinity for byte pointer building).
+
+static int build_FCP_payload( Scsi_Cmnd *Cmnd,
+ UCHAR* payload, ULONG type, ULONG fcp_dl )
+{
+ int i;
+
+
+ switch( type)
+ {
+
+ case SCSI_IWE:
+ case SCSI_IRE:
+ // 8 bytes FCP_LUN
+ // Peripheral Device or Volume Set addressing, and LUN mapping
+ // When the FC port was looked up, we copied address mode
+ // and any LUN mask to the scratch pad SCp.phase & .mode
+
+ *payload++ = (UCHAR)Cmnd->SCp.phase;
+
+ // Now, because of "lun masking"
+ // (aka selective storage presentation),
+ // the contiguous Linux Scsi lun number may not match the
+ // device's lun number, so we may have to "map".
+
+ *payload++ = (UCHAR)Cmnd->SCp.have_data_in;
+
+ // We don't know of anyone in the FC business using these
+ // extra "levels" of addressing. In fact, confusion still exists
+ // just using the FIRST level... ;-)
+
+ *payload++ = 0; // 2nd level addressing
+ *payload++ = 0;
+ *payload++ = 0; // 3rd level addressing
+ *payload++ = 0;
+ *payload++ = 0; // 4th level addressing
+ *payload++ = 0;
+
+ // 4 bytes Control Field FCP_CNTL
+ *payload++ = 0; // byte 0: (MSB) reserved
+ *payload++ = 0; // byte 1: task codes
+ *payload++ = 0; // byte 2: task management flags
+ // byte 3: (LSB) execution management codes
+ // bit 0 write, bit 1 read (don't set together)
+
+ if( fcp_dl != 0 )
+ {
+ if( type == SCSI_IWE ) // WRITE
+ *payload++ = 1;
+ else // READ
+ *payload++ = 2;
+ }
+ else
+ {
+ // On some devices, if RD or WR bits are set,
+ // and fcp_dl is 0, they will generate an error on the command.
+ // (i.e., if direction is specified, they insist on a length).
+ *payload++ = 0; // no data (necessary for CPQ)
+ }
+
+
+ // NOTE: clean this up if/when MAX_COMMAND_SIZE is increased to 16
+ // FCP_CDB allows 16 byte SCSI command descriptor blk;
+ // Linux SCSI CDB array is MAX_COMMAND_SIZE (12 at this time...)
+ for( i=0; (i < Cmnd->cmd_len) && i < MAX_COMMAND_SIZE; i++)
+ *payload++ = Cmnd->cmnd[i];
+
+ if( Cmnd->cmd_len == 16 )
+ {
+ memcpy( payload, &Cmnd->SCp.buffers_residual, 4);
+ }
+ payload+= (16 - i);
+
+ // FCP_DL is largest number of expected data bytes
+ // per CDB (i.e. read/write command)
+ *payload++ = (UCHAR)(fcp_dl >>24); // (MSB) 8 bytes data len FCP_DL
+ *payload++ = (UCHAR)(fcp_dl >>16);
+ *payload++ = (UCHAR)(fcp_dl >>8);
+ *payload++ = (UCHAR)fcp_dl; // (LSB)
+ break;
+
+ case SCSI_TWE: // need FCP_XFER_RDY
+ *payload++ = 0; // (4 bytes) DATA_RO (MSB byte 0)
+ *payload++ = 0;
+ *payload++ = 0;
+ *payload++ = 0; // LSB (byte 3)
+ // (4 bytes) BURST_LEN
+ // size of following FCP_DATA payload
+ *payload++ = (UCHAR)(fcp_dl >>24); // (MSB) 8 bytes data len FCP_DL
+ *payload++ = (UCHAR)(fcp_dl >>16);
+ *payload++ = (UCHAR)(fcp_dl >>8);
+ *payload++ = (UCHAR)fcp_dl; // (LSB)
+ // 4 bytes RESERVED
+ *payload++ = 0;
+ *payload++ = 0;
+ *payload++ = 0;
+ *payload++ = 0;
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)