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cpqfcTSinit.c
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cpqfcTSinit.c
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/* 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
* IOCTL and procfs added by Jouke Numan
* SMP testing by Chel Van Gennip
*
* portions copied from:
* QLogic CPQFCTS SCSI-FCP
* Written by Erik H. Moe, [email protected]
* Copyright 1995, Erik H. Moe
* Renamed and updated to 1.3.x by Michael Griffith <[email protected]>
* Chris Loveland <[email protected]> to support the isp2100 and isp2200
*/
#define LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s))
#include <linux/config.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/blkdev.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/ioport.h> // request_region() prototype
#include <linux/completion.h>
#include <asm/io.h>
#include <asm/uaccess.h> // ioctl related
#include <asm/irq.h>
#include <linux/spinlock.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include "cpqfcTSchip.h"
#include "cpqfcTSstructs.h"
#include "cpqfcTStrigger.h"
#include "cpqfcTS.h"
/* Embedded module documentation macros - see module.h */
MODULE_AUTHOR("Compaq Computer Corporation");
MODULE_DESCRIPTION("Driver for Compaq 64-bit/66Mhz PCI Fibre Channel HBA v. 2.5.4");
MODULE_LICENSE("GPL");
int cpqfcTS_TargetDeviceReset( Scsi_Device *ScsiDev, unsigned int reset_flags);
// This struct was originally defined in
// /usr/src/linux/include/linux/proc_fs.h
// since it's only partially implemented, we only use first
// few fields...
// NOTE: proc_fs changes in 2.4 kernel
#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
static struct proc_dir_entry proc_scsi_cpqfcTS =
{
PROC_SCSI_CPQFCTS, // ushort low_ino (enumerated list)
7, // ushort namelen
DEV_NAME, // const char* name
S_IFDIR | S_IRUGO | S_IXUGO, // mode_t mode
2 // nlink_t nlink
// etc. ...
};
#endif
#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,7)
# define CPQFC_DECLARE_COMPLETION(x) DECLARE_COMPLETION(x)
# define CPQFC_WAITING waiting
# define CPQFC_COMPLETE(x) complete(x)
# define CPQFC_WAIT_FOR_COMPLETION(x) wait_for_completion(x);
#else
# define CPQFC_DECLARE_COMPLETION(x) DECLARE_MUTEX_LOCKED(x)
# define CPQFC_WAITING sem
# define CPQFC_COMPLETE(x) up(x)
# define CPQFC_WAIT_FOR_COMPLETION(x) down(x)
#endif
static int cpqfc_alloc_private_data_pool(CPQFCHBA *hba);
/* local function to load our per-HBA (local) data for chip
registers, FC link state, all FC exchanges, etc.
We allocate space and compute address offsets for the
most frequently accessed addresses; others (like World Wide
Name) are not necessary.
*/
static void Cpqfc_initHBAdata(CPQFCHBA *cpqfcHBAdata, struct pci_dev *PciDev )
{
cpqfcHBAdata->PciDev = PciDev; // copy PCI info ptr
// since x86 port space is 64k, we only need the lower 16 bits
cpqfcHBAdata->fcChip.Registers.IOBaseL =
PciDev->resource[1].start & PCI_BASE_ADDRESS_IO_MASK;
cpqfcHBAdata->fcChip.Registers.IOBaseU =
PciDev->resource[2].start & PCI_BASE_ADDRESS_IO_MASK;
// 32-bit memory addresses
cpqfcHBAdata->fcChip.Registers.MemBase =
PciDev->resource[3].start & PCI_BASE_ADDRESS_MEM_MASK;
cpqfcHBAdata->fcChip.Registers.ReMapMemBase =
ioremap( PciDev->resource[3].start & PCI_BASE_ADDRESS_MEM_MASK,
0x200);
cpqfcHBAdata->fcChip.Registers.RAMBase =
PciDev->resource[4].start;
cpqfcHBAdata->fcChip.Registers.SROMBase = // NULL for HP TS adapter
PciDev->resource[5].start;
// now the Tachlite chip registers
// the REGISTER struct holds both the physical address & last
// written value (some TL registers are WRITE ONLY)
cpqfcHBAdata->fcChip.Registers.SFQconsumerIndex.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_SFQ_CONSUMER_INDEX;
cpqfcHBAdata->fcChip.Registers.ERQproducerIndex.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_ERQ_PRODUCER_INDEX;
// TL Frame Manager
cpqfcHBAdata->fcChip.Registers.FMconfig.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_CONFIG;
cpqfcHBAdata->fcChip.Registers.FMcontrol.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_CONTROL;
cpqfcHBAdata->fcChip.Registers.FMstatus.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_STATUS;
cpqfcHBAdata->fcChip.Registers.FMLinkStatus1.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_LINK_STAT1;
cpqfcHBAdata->fcChip.Registers.FMLinkStatus2.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_LINK_STAT2;
cpqfcHBAdata->fcChip.Registers.FMBB_CreditZero.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_BB_CREDIT0;
// TL Control Regs
cpqfcHBAdata->fcChip.Registers.TYconfig.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_TACH_CONFIG;
cpqfcHBAdata->fcChip.Registers.TYcontrol.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_TACH_CONTROL;
cpqfcHBAdata->fcChip.Registers.TYstatus.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_TACH_STATUS;
cpqfcHBAdata->fcChip.Registers.rcv_al_pa.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_RCV_AL_PA;
cpqfcHBAdata->fcChip.Registers.ed_tov.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + TL_MEM_FM_ED_TOV;
cpqfcHBAdata->fcChip.Registers.INTEN.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + IINTEN;
cpqfcHBAdata->fcChip.Registers.INTPEND.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + IINTPEND;
cpqfcHBAdata->fcChip.Registers.INTSTAT.address =
cpqfcHBAdata->fcChip.Registers.ReMapMemBase + IINTSTAT;
DEBUG_PCI(printk(" cpqfcHBAdata->fcChip.Registers. :\n"));
DEBUG_PCI(printk(" IOBaseL = %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseL));
DEBUG_PCI(printk(" IOBaseU = %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseU));
/* printk(" ioremap'd Membase: %p\n", cpqfcHBAdata->fcChip.Registers.ReMapMemBase); */
DEBUG_PCI(printk(" SFQconsumerIndex.address = %p\n",
cpqfcHBAdata->fcChip.Registers.SFQconsumerIndex.address));
DEBUG_PCI(printk(" ERQproducerIndex.address = %p\n",
cpqfcHBAdata->fcChip.Registers.ERQproducerIndex.address));
DEBUG_PCI(printk(" TYconfig.address = %p\n",
cpqfcHBAdata->fcChip.Registers.TYconfig.address));
DEBUG_PCI(printk(" FMconfig.address = %p\n",
cpqfcHBAdata->fcChip.Registers.FMconfig.address));
DEBUG_PCI(printk(" FMcontrol.address = %p\n",
cpqfcHBAdata->fcChip.Registers.FMcontrol.address));
// set default options for FC controller (chip)
cpqfcHBAdata->fcChip.Options.initiator = 1; // default: SCSI initiator
cpqfcHBAdata->fcChip.Options.target = 0; // default: SCSI target
cpqfcHBAdata->fcChip.Options.extLoopback = 0;// default: no loopback @GBIC
cpqfcHBAdata->fcChip.Options.intLoopback = 0;// default: no loopback inside chip
// set highest and lowest FC-PH version the adapter/driver supports
// (NOT strict compliance)
cpqfcHBAdata->fcChip.highest_FCPH_ver = FC_PH3;
cpqfcHBAdata->fcChip.lowest_FCPH_ver = FC_PH43;
// set function points for this controller / adapter
cpqfcHBAdata->fcChip.ResetTachyon = CpqTsResetTachLite;
cpqfcHBAdata->fcChip.FreezeTachyon = CpqTsFreezeTachlite;
cpqfcHBAdata->fcChip.UnFreezeTachyon = CpqTsUnFreezeTachlite;
cpqfcHBAdata->fcChip.CreateTachyonQues = CpqTsCreateTachLiteQues;
cpqfcHBAdata->fcChip.DestroyTachyonQues = CpqTsDestroyTachLiteQues;
cpqfcHBAdata->fcChip.InitializeTachyon = CpqTsInitializeTachLite;
cpqfcHBAdata->fcChip.LaserControl = CpqTsLaserControl;
cpqfcHBAdata->fcChip.ProcessIMQEntry = CpqTsProcessIMQEntry;
cpqfcHBAdata->fcChip.InitializeFrameManager = CpqTsInitializeFrameManager;
cpqfcHBAdata->fcChip.ReadWriteWWN = CpqTsReadWriteWWN;
cpqfcHBAdata->fcChip.ReadWriteNVRAM = CpqTsReadWriteNVRAM;
if (cpqfc_alloc_private_data_pool(cpqfcHBAdata) != 0) {
printk(KERN_WARNING
"cpqfc: unable to allocate pool for passthru ioctls. "
"Passthru ioctls disabled.\n");
}
}
/* (borrowed from linux/drivers/scsi/hosts.c) */
static void launch_FCworker_thread(struct Scsi_Host *HostAdapter)
{
DECLARE_MUTEX_LOCKED(sem);
CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
ENTER("launch_FC_worker_thread");
cpqfcHBAdata->notify_wt = &sem;
/* must unlock before kernel_thread(), for it may cause a reschedule. */
spin_unlock_irq(HostAdapter->host_lock);
kernel_thread((int (*)(void *))cpqfcTSWorkerThread,
(void *) HostAdapter, 0);
/*
* Now wait for the kernel error thread to initialize itself
*/
down (&sem);
spin_lock_irq(HostAdapter->host_lock);
cpqfcHBAdata->notify_wt = NULL;
LEAVE("launch_FC_worker_thread");
}
/* "Entry" point to discover if any supported PCI
bus adapter can be found
*/
/* We're supporting:
* Compaq 64-bit, 66MHz HBA with Tachyon TS
* Agilent XL2
* HP Tachyon
*/
#define HBA_TYPES 3
#ifndef PCI_DEVICE_ID_COMPAQ_
#define PCI_DEVICE_ID_COMPAQ_TACHYON 0xa0fc
#endif
static struct SupportedPCIcards cpqfc_boards[] __initdata = {
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TACHYON},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_TACHLITE},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_TACHYON},
};
int cpqfcTS_detect(Scsi_Host_Template *ScsiHostTemplate)
{
int NumberOfAdapters=0; // how many of our PCI adapters are found?
struct pci_dev *PciDev = NULL;
struct Scsi_Host *HostAdapter = NULL;
CPQFCHBA *cpqfcHBAdata = NULL;
struct timer_list *cpqfcTStimer = NULL;
int i;
ENTER("cpqfcTS_detect");
#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
ScsiHostTemplate->proc_dir = &proc_scsi_cpqfcTS;
#else
ScsiHostTemplate->proc_name = "cpqfcTS";
#endif
for( i=0; i < HBA_TYPES; i++)
{
// look for all HBAs of each type
while((PciDev = pci_find_device(cpqfc_boards[i].vendor_id,
cpqfc_boards[i].device_id, PciDev)))
{
if (pci_enable_device(PciDev)) {
printk(KERN_ERR
"cpqfc: can't enable PCI device at %s\n", pci_name(PciDev));
goto err_continue;
}
if (pci_set_dma_mask(PciDev, CPQFCTS_DMA_MASK) != 0) {
printk(KERN_WARNING
"cpqfc: HBA cannot support required DMA mask, skipping.\n");
goto err_disable_dev;
}
// NOTE: (kernel 2.2.12-32) limits allocation to 128k bytes...
/* printk(" scsi_register allocating %d bytes for FC HBA\n",
(ULONG)sizeof(CPQFCHBA)); */
HostAdapter = scsi_register( ScsiHostTemplate, sizeof( CPQFCHBA ) );
if(HostAdapter == NULL) {
printk(KERN_WARNING
"cpqfc: can't register SCSI HBA, skipping.\n");
goto err_disable_dev;
}
DEBUG_PCI( printk(" HBA found!\n"));
DEBUG_PCI( printk(" HostAdapter->PciDev->irq = %u\n", PciDev->irq) );
DEBUG_PCI(printk(" PciDev->baseaddress[0]= %lx\n",
PciDev->resource[0].start));
DEBUG_PCI(printk(" PciDev->baseaddress[1]= %lx\n",
PciDev->resource[1].start));
DEBUG_PCI(printk(" PciDev->baseaddress[2]= %lx\n",
PciDev->resource[2].start));
DEBUG_PCI(printk(" PciDev->baseaddress[3]= %lx\n",
PciDev->resource[3].start));
HostAdapter->irq = PciDev->irq; // copy for Scsi layers
// HP Tachlite uses two (255-byte) ranges of Port I/O (lower & upper),
// for a total I/O port address space of 512 bytes.
// mask out the I/O port address (lower) & record
HostAdapter->io_port = (unsigned int)
PciDev->resource[1].start & PCI_BASE_ADDRESS_IO_MASK;
HostAdapter->n_io_port = 0xff;
// i.e., expect 128 targets (arbitrary number), while the
// RA-4000 supports 32 LUNs
HostAdapter->max_id = 0; // incremented as devices log in
HostAdapter->max_lun = CPQFCTS_MAX_LUN; // LUNs per FC device
HostAdapter->max_channel = CPQFCTS_MAX_CHANNEL; // multiple busses?
// get the pointer to our HBA specific data... (one for
// each HBA on the PCI bus(ses)).
cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
// make certain our data struct is clear
memset( cpqfcHBAdata, 0, sizeof( CPQFCHBA ) );
// initialize our HBA info
cpqfcHBAdata->HBAnum = NumberOfAdapters;
cpqfcHBAdata->HostAdapter = HostAdapter; // back ptr
Cpqfc_initHBAdata( cpqfcHBAdata, PciDev ); // fill MOST fields
cpqfcHBAdata->HBAnum = NumberOfAdapters;
spin_lock_init(&cpqfcHBAdata->hba_spinlock);
// request necessary resources and check for conflicts
if( request_irq( HostAdapter->irq,
cpqfcTS_intr_handler,
SA_INTERRUPT | SA_SHIRQ,
DEV_NAME,
HostAdapter) )
{
printk(KERN_WARNING "cpqfc: IRQ %u already used\n", HostAdapter->irq);
goto err_unregister;
}
// Since we have two 256-byte I/O port ranges (upper
// and lower), check them both
if( !request_region( cpqfcHBAdata->fcChip.Registers.IOBaseU,
0xff, DEV_NAME ) )
{
printk(KERN_WARNING "cpqfc: address in use: %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseU);
goto err_free_irq;
}
if( !request_region( cpqfcHBAdata->fcChip.Registers.IOBaseL,
0xff, DEV_NAME ) )
{
printk(KERN_WARNING "cpqfc: address in use: %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseL);
goto err_release_region_U;
}
// OK, we have grabbed everything we need now.
DEBUG_PCI(printk(" Reserved 255 I/O addresses @ %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseL ));
DEBUG_PCI(printk(" Reserved 255 I/O addresses @ %x\n",
cpqfcHBAdata->fcChip.Registers.IOBaseU ));
// start our kernel worker thread
spin_lock_irq(HostAdapter->host_lock);
launch_FCworker_thread(HostAdapter);
// start our TimerTask...
cpqfcTStimer = &cpqfcHBAdata->cpqfcTStimer;
init_timer( cpqfcTStimer); // Linux clears next/prev values
cpqfcTStimer->expires = jiffies + HZ; // one second
cpqfcTStimer->data = (unsigned long)cpqfcHBAdata; // this adapter
cpqfcTStimer->function = cpqfcTSheartbeat; // handles timeouts, housekeeping
add_timer( cpqfcTStimer); // give it to Linux
// now initialize our hardware...
if (cpqfcHBAdata->fcChip.InitializeTachyon( cpqfcHBAdata, 1,1)) {
printk(KERN_WARNING "cpqfc: initialization of HBA hardware failed.\n");
goto err_release_region_L;
}
cpqfcHBAdata->fcStatsTime = jiffies; // (for FC Statistics delta)
// give our HBA time to initialize and login current devices...
{
// The Brocade switch (e.g. 2400, 2010, etc.) as of March 2000,
// has the following algorithm for FL_Port startup:
// Time(sec) Action
// 0: Device Plugin and LIP(F7,F7) transmission
// 1.0 LIP incoming
// 1.027 LISA incoming, no CLS! (link not up)
// 1.028 NOS incoming (switch test for N_Port)
// 1.577 ED_TOV expired, transmit LIPs again
// 3.0 LIP(F8,F7) incoming (switch passes Tach Prim.Sig)
// 3.028 LILP received, link up, FLOGI starts
// slowest(worst) case, measured on 1Gb Finisar GT analyzer
unsigned long stop_time;
spin_unlock_irq(HostAdapter->host_lock);
stop_time = jiffies + 4*HZ;
while ( time_before(jiffies, stop_time) )
schedule(); // (our worker task needs to run)
}
spin_lock_irq(HostAdapter->host_lock);
NumberOfAdapters++;
spin_unlock_irq(HostAdapter->host_lock);
continue;
err_release_region_L:
release_region( cpqfcHBAdata->fcChip.Registers.IOBaseL, 0xff );
err_release_region_U:
release_region( cpqfcHBAdata->fcChip.Registers.IOBaseU, 0xff );
err_free_irq:
free_irq( HostAdapter->irq, HostAdapter);
err_unregister:
scsi_unregister( HostAdapter);
err_disable_dev:
pci_disable_device( PciDev );
err_continue:
continue;
} // end of while()
}
LEAVE("cpqfcTS_detect");
return NumberOfAdapters;
}
#ifdef SUPPORT_RESET
static void my_ioctl_done (Scsi_Cmnd * SCpnt)
{
struct request * req;
req = SCpnt->request;
req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
if (req->CPQFC_WAITING != NULL)
CPQFC_COMPLETE(req->CPQFC_WAITING);
}
#endif
static int cpqfc_alloc_private_data_pool(CPQFCHBA *hba)
{
hba->private_data_bits = NULL;
hba->private_data_pool = NULL;
hba->private_data_bits =
kmalloc(((CPQFC_MAX_PASSTHRU_CMDS+BITS_PER_LONG-1) /
BITS_PER_LONG)*sizeof(unsigned long),
GFP_KERNEL);
if (hba->private_data_bits == NULL)
return -1;
memset(hba->private_data_bits, 0,
((CPQFC_MAX_PASSTHRU_CMDS+BITS_PER_LONG-1) /
BITS_PER_LONG)*sizeof(unsigned long));
hba->private_data_pool = kmalloc(sizeof(cpqfc_passthru_private_t) *
CPQFC_MAX_PASSTHRU_CMDS, GFP_KERNEL);
if (hba->private_data_pool == NULL) {
kfree(hba->private_data_bits);
hba->private_data_bits = NULL;
return -1;
}
return 0;
}
static void cpqfc_free_private_data_pool(CPQFCHBA *hba)
{
kfree(hba->private_data_bits);
kfree(hba->private_data_pool);
}
int is_private_data_of_cpqfc(CPQFCHBA *hba, void *pointer)
{
/* Is pointer within our private data pool?
We use Scsi_Request->upper_private_data (normally
reserved for upper layer drivers, e.g. the sg driver)
We check to see if the pointer is ours by looking at
its address. Is this ok? Hmm, it occurs to me that
a user app might do something bad by using sg to send
a cpqfc passthrough ioctl with upper_data_private
forged to be somewhere in our pool..., though they'd
normally have to be root already to do this. */
return (pointer != NULL &&
pointer >= (void *) hba->private_data_pool &&
pointer < (void *) hba->private_data_pool +
sizeof(*hba->private_data_pool) *
CPQFC_MAX_PASSTHRU_CMDS);
}
cpqfc_passthru_private_t *cpqfc_alloc_private_data(CPQFCHBA *hba)
{
int i;
do {
i = find_first_zero_bit(hba->private_data_bits,
CPQFC_MAX_PASSTHRU_CMDS);
if (i == CPQFC_MAX_PASSTHRU_CMDS)
return NULL;
} while ( test_and_set_bit(i & (BITS_PER_LONG - 1),
hba->private_data_bits+(i/BITS_PER_LONG)) != 0);
return &hba->private_data_pool[i];
}
void cpqfc_free_private_data(CPQFCHBA *hba, cpqfc_passthru_private_t *data)
{
int i;
i = data - hba->private_data_pool;
clear_bit(i&(BITS_PER_LONG-1),
hba->private_data_bits+(i/BITS_PER_LONG));
}
int cpqfcTS_ioctl( struct scsi_device *ScsiDev, int Cmnd, void *arg)
{
int result = 0;
struct Scsi_Host *HostAdapter = ScsiDev->host;
CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
PTACHYON fcChip = &cpqfcHBAdata->fcChip;
PFC_LOGGEDIN_PORT pLoggedInPort = NULL;
struct scsi_cmnd *DumCmnd;
int i, j;
VENDOR_IOCTL_REQ ioc;
cpqfc_passthru_t *vendor_cmd;
Scsi_Device *SDpnt;
Scsi_Request *ScsiPassThruReq;
cpqfc_passthru_private_t *privatedata;
ENTER("cpqfcTS_ioctl ");
// printk("ioctl CMND %d", Cmnd);
switch (Cmnd) {
// Passthrough provides a mechanism to bypass the RAID
// or other controller and talk directly to the devices
// (e.g. physical disk drive)
// Passthrough commands, unfortunately, tend to be vendor
// specific; this is tailored to COMPAQ's RAID (RA4x00)
case CPQFCTS_SCSI_PASSTHRU:
{
void *buf = NULL; // for kernel space buffer for user data
/* Check that our pool got allocated ok. */
if (cpqfcHBAdata->private_data_pool == NULL)
return -ENOMEM;
if( !arg)
return -EINVAL;
// must be super user to send stuff directly to the
// controller and/or physical drives...
if( !capable(CAP_SYS_RAWIO) )
return -EPERM;
// copy the caller's struct to our space.
if( copy_from_user( &ioc, arg, sizeof( VENDOR_IOCTL_REQ)))
return( -EFAULT);
vendor_cmd = ioc.argp; // i.e., CPQ specific command struct
// If necessary, grab a kernel/DMA buffer
if( vendor_cmd->len)
{
buf = kmalloc( vendor_cmd->len, GFP_KERNEL);
if( !buf)
return -ENOMEM;
}
// Now build a Scsi_Request to pass down...
ScsiPassThruReq = scsi_allocate_request(ScsiDev, GFP_KERNEL);
if (ScsiPassThruReq == NULL) {
kfree(buf);
return -ENOMEM;
}
ScsiPassThruReq->upper_private_data =
cpqfc_alloc_private_data(cpqfcHBAdata);
if (ScsiPassThruReq->upper_private_data == NULL) {
kfree(buf);
scsi_release_request(ScsiPassThruReq); // "de-allocate"
return -ENOMEM;
}
if (vendor_cmd->rw_flag == VENDOR_WRITE_OPCODE) {
if (vendor_cmd->len) { // Need data from user?
if (copy_from_user(buf, vendor_cmd->bufp,
vendor_cmd->len)) {
kfree(buf);
cpqfc_free_private_data(cpqfcHBAdata,
ScsiPassThruReq->upper_private_data);
scsi_release_request(ScsiPassThruReq);
return( -EFAULT);
}
}
ScsiPassThruReq->sr_data_direction = DMA_TO_DEVICE;
} else if (vendor_cmd->rw_flag == VENDOR_READ_OPCODE) {
ScsiPassThruReq->sr_data_direction = DMA_FROM_DEVICE;
} else
// maybe this means a bug in the user app
ScsiPassThruReq->sr_data_direction = DMA_BIDIRECTIONAL;
ScsiPassThruReq->sr_cmd_len = 0; // set correctly by scsi_do_req()
ScsiPassThruReq->sr_sense_buffer[0] = 0;
ScsiPassThruReq->sr_sense_buffer[2] = 0;
// We copy the scheme used by sd.c:spinup_disk() to submit commands
// to our own HBA. We do this in order to stall the
// thread calling the IOCTL until it completes, and use
// the same "_quecommand" function for synchronizing
// FC Link events with our "worker thread".
privatedata = ScsiPassThruReq->upper_private_data;
privatedata->bus = vendor_cmd->bus;
privatedata->pdrive = vendor_cmd->pdrive;
// eventually gets us to our own _quecommand routine
scsi_wait_req(ScsiPassThruReq,
&vendor_cmd->cdb[0], buf, vendor_cmd->len,
10*HZ, // timeout
1); // retries
result = ScsiPassThruReq->sr_result;
// copy any sense data back to caller
if( result != 0 )
{
memcpy( vendor_cmd->sense_data, // see struct def - size=40
ScsiPassThruReq->sr_sense_buffer,
sizeof(ScsiPassThruReq->sr_sense_buffer) <
sizeof(vendor_cmd->sense_data) ?
sizeof(ScsiPassThruReq->sr_sense_buffer) :
sizeof(vendor_cmd->sense_data)
);
}
SDpnt = ScsiPassThruReq->sr_device;
/* upper_private_data is already freed in call_scsi_done() */
scsi_release_request(ScsiPassThruReq); // "de-allocate"
ScsiPassThruReq = NULL;
// need to pass data back to user (space)?
if( (vendor_cmd->rw_flag == VENDOR_READ_OPCODE) &&
vendor_cmd->len )
if( copy_to_user( vendor_cmd->bufp, buf, vendor_cmd->len))
result = -EFAULT;
kfree(buf);
return result;
}
case CPQFCTS_GETPCIINFO:
{
cpqfc_pci_info_struct pciinfo;
if( !arg)
return -EINVAL;
pciinfo.bus = cpqfcHBAdata->PciDev->bus->number;
pciinfo.dev_fn = cpqfcHBAdata->PciDev->devfn;
pciinfo.board_id = cpqfcHBAdata->PciDev->device |
(cpqfcHBAdata->PciDev->vendor <<16);
if(copy_to_user( arg, &pciinfo, sizeof(cpqfc_pci_info_struct)))
return( -EFAULT);
return 0;
}
case CPQFCTS_GETDRIVVER:
{
DriverVer_type DriverVer =
CPQFCTS_DRIVER_VER( VER_MAJOR,VER_MINOR,VER_SUBMINOR);
if( !arg)
return -EINVAL;
if(copy_to_user( arg, &DriverVer, sizeof(DriverVer)))
return( -EFAULT);
return 0;
}
case CPQFC_IOCTL_FC_TARGET_ADDRESS:
// can we find an FC device mapping to this SCSI target?
/* DumCmnd.channel = ScsiDev->channel; */ // For searching
/* DumCmnd.target = ScsiDev->id; */
/* DumCmnd.lun = ScsiDev->lun; */
DumCmnd = scsi_get_command (ScsiDev, GFP_KERNEL);
if (!DumCmnd)
return -ENOMEM;
pLoggedInPort = fcFindLoggedInPort( fcChip,
DumCmnd, // search 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
scsi_put_command (DumCmnd);
if (pLoggedInPort == NULL) {
result = -ENXIO;
break;
}
result = access_ok(VERIFY_WRITE, arg, sizeof(Scsi_FCTargAddress)) ? 0 : -EFAULT;
if (result) break;
put_user(pLoggedInPort->port_id,
&((Scsi_FCTargAddress *) arg)->host_port_id);
for( i=3,j=0; i>=0; i--) // copy the LOGIN port's WWN
put_user(pLoggedInPort->u.ucWWN[i],
&((Scsi_FCTargAddress *) arg)->host_wwn[j++]);
for( i=7; i>3; i--) // copy the LOGIN port's WWN
put_user(pLoggedInPort->u.ucWWN[i],
&((Scsi_FCTargAddress *) arg)->host_wwn[j++]);
break;
case CPQFC_IOCTL_FC_TDR:
result = cpqfcTS_TargetDeviceReset( ScsiDev, 0);
break;
default:
result = -EINVAL;
break;
}
LEAVE("cpqfcTS_ioctl");
return result;
}
/* "Release" the Host Bus Adapter...
disable interrupts, stop the HBA, release the interrupt,
and free all resources */
int cpqfcTS_release(struct Scsi_Host *HostAdapter)
{
CPQFCHBA *cpqfcHBAdata = (CPQFCHBA *)HostAdapter->hostdata;
ENTER("cpqfcTS_release");
DEBUG_PCI( printk(" cpqfcTS: delete timer...\n"));
del_timer( &cpqfcHBAdata->cpqfcTStimer);
// disable the hardware...
DEBUG_PCI( printk(" disable hardware, destroy queues, free mem\n"));
cpqfcHBAdata->fcChip.ResetTachyon( cpqfcHBAdata, CLEAR_FCPORTS);
// kill kernel thread
if( cpqfcHBAdata->worker_thread ) // (only if exists)
{
DECLARE_MUTEX_LOCKED(sem); // synchronize thread kill
cpqfcHBAdata->notify_wt = &sem;
DEBUG_PCI( printk(" killing kernel thread\n"));
send_sig( SIGKILL, cpqfcHBAdata->worker_thread, 1);
down( &sem);
cpqfcHBAdata->notify_wt = NULL;
}
cpqfc_free_private_data_pool(cpqfcHBAdata);
// free Linux resources
DEBUG_PCI( printk(" cpqfcTS: freeing resources...\n"));
free_irq( HostAdapter->irq, HostAdapter);
scsi_unregister( HostAdapter);
release_region( cpqfcHBAdata->fcChip.Registers.IOBaseL, 0xff);
release_region( cpqfcHBAdata->fcChip.Registers.IOBaseU, 0xff);
/* we get "vfree: bad address" executing this - need to investigate...
if( (void*)((unsigned long)cpqfcHBAdata->fcChip.Registers.MemBase) !=
cpqfcHBAdata->fcChip.Registers.ReMapMemBase)
vfree( cpqfcHBAdata->fcChip.Registers.ReMapMemBase);
*/
pci_disable_device( cpqfcHBAdata->PciDev);
LEAVE("cpqfcTS_release");
return 0;
}
const char * cpqfcTS_info(struct Scsi_Host *HostAdapter)
{
static char buf[300];
CPQFCHBA *cpqfcHBA;
int BusSpeed, BusWidth;
// get the pointer to our Scsi layer HBA buffer
cpqfcHBA = (CPQFCHBA *)HostAdapter->hostdata;
BusWidth = (cpqfcHBA->fcChip.Registers.PCIMCTR &0x4) > 0 ?
64 : 32;
if( cpqfcHBA->fcChip.Registers.TYconfig.value & 0x80000000)
BusSpeed = 66;
else
BusSpeed = 33;
sprintf(buf,
"%s: WWN %08X%08X\n on PCI bus %d device 0x%02x irq %d IObaseL 0x%x, MEMBASE 0x%x\nPCI bus width %d bits, bus speed %d MHz\nFCP-SCSI Driver v%d.%d.%d",
cpqfcHBA->fcChip.Name,
cpqfcHBA->fcChip.Registers.wwn_hi,
cpqfcHBA->fcChip.Registers.wwn_lo,
cpqfcHBA->PciDev->bus->number,
cpqfcHBA->PciDev->device,
HostAdapter->irq,
cpqfcHBA->fcChip.Registers.IOBaseL,
cpqfcHBA->fcChip.Registers.MemBase,
BusWidth,
BusSpeed,
VER_MAJOR, VER_MINOR, VER_SUBMINOR
);
cpqfcTSDecodeGBICtype( &cpqfcHBA->fcChip, &buf[ strlen(buf)]);
cpqfcTSGetLPSM( &cpqfcHBA->fcChip, &buf[ strlen(buf)]);
return buf;
}
//
// /proc/scsi support. The following routines allow us to do 'normal'
// sprintf like calls to return the currently requested piece (buflenght
// chars, starting at bufoffset) of the file. Although procfs allows for
// a 1 Kb bytes overflow after te supplied buffer, I consider it bad
// programming to use it to make programming a little simpler. This piece
// of coding is borrowed from ncr53c8xx.c with some modifications
//
struct info_str
{
char *buffer; // Pointer to output buffer
int buflength; // It's length
int bufoffset; // File offset corresponding with buf[0]
int buffillen; // Current filled length
int filpos; // Current file offset
};
static void copy_mem_info(struct info_str *info, char *data, int datalen)
{
if (info->filpos < info->bufoffset) { // Current offset before buffer offset
if (info->filpos + datalen <= info->bufoffset) {
info->filpos += datalen; // Discard if completely before buffer
return;
} else { // Partial copy, set to begin
data += (info->bufoffset - info->filpos);
datalen -= (info->bufoffset - info->filpos);
info->filpos = info->bufoffset;
}
}
info->filpos += datalen; // Update current offset
if (info->buffillen == info->buflength) // Buffer full, discard
return;
if (info->buflength - info->buffillen < datalen) // Overflows buffer ?
datalen = info->buflength - info->buffillen;
memcpy(info->buffer + info->buffillen, data, datalen);
info->buffillen += datalen;
}
static int copy_info(struct info_str *info, char *fmt, ...)
{
va_list args;
char buf[400];
int len;
va_start(args, fmt);
len = vsprintf(buf, fmt, args);
va_end(args);
copy_mem_info(info, buf, len);
return len;
}
// Routine to get data for /proc RAM filesystem
//
int cpqfcTS_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length,
int inout)
{
struct scsi_cmnd *DumCmnd;
struct scsi_device *ScsiDev;
int Chan, Targ, i;
struct info_str info;
CPQFCHBA *cpqfcHBA;
PTACHYON fcChip;
PFC_LOGGEDIN_PORT pLoggedInPort;
char buf[81];
if (inout) return -EINVAL;
// get the pointer to our Scsi layer HBA buffer
cpqfcHBA = (CPQFCHBA *)host->hostdata;
fcChip = &cpqfcHBA->fcChip;
*start = buffer;
info.buffer = buffer;
info.buflength = length;
info.bufoffset = offset;
info.filpos = 0;
info.buffillen = 0;
copy_info(&info, "Driver version = %d.%d.%d", VER_MAJOR, VER_MINOR, VER_SUBMINOR);
cpqfcTSDecodeGBICtype( &cpqfcHBA->fcChip, &buf[0]);
cpqfcTSGetLPSM( &cpqfcHBA->fcChip, &buf[ strlen(buf)]);
copy_info(&info, "%s\n", buf);
#define DISPLAY_WWN_INFO
#ifdef DISPLAY_WWN_INFO
ScsiDev = scsi_get_host_dev (host);
if (!ScsiDev)
return -ENOMEM;
DumCmnd = scsi_get_command (ScsiDev, GFP_KERNEL);
if (!DumCmnd) {
scsi_free_host_dev (ScsiDev);
return -ENOMEM;
}
copy_info(&info, "WWN database: (\"port_id: 000000\" means disconnected)\n");
for ( Chan=0; Chan <= host->max_channel; Chan++) {
DumCmnd->device->channel = Chan;
for (Targ=0; Targ <= host->max_id; Targ++) {
DumCmnd->device->id = Targ;
if ((pLoggedInPort = fcFindLoggedInPort( fcChip,
DumCmnd, // search Scsi Nexus
0, // DON'T search list for FC port id
NULL, // DON'T search list for FC WWN
NULL))){ // DON'T care about end of list
copy_info(&info, "Host: scsi%d Channel: %02d TargetId: %02d -> WWN: ",
host->host_no, Chan, Targ);
for( i=3; i>=0; i--) // copy the LOGIN port's WWN
copy_info(&info, "%02X", pLoggedInPort->u.ucWWN[i]);
for( i=7; i>3; i--) // copy the LOGIN port's WWN
copy_info(&info, "%02X", pLoggedInPort->u.ucWWN[i]);
copy_info(&info, " port_id: %06X\n", pLoggedInPort->port_id);
}
}
}
scsi_put_command (DumCmnd);
scsi_free_host_dev (ScsiDev);
#endif