/
initio.c
3011 lines (2623 loc) · 81.3 KB
/
initio.c
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/**************************************************************************
* Initio 9100 device driver for Linux.
*
* Copyright (c) 1994-1998 Initio Corporation
* Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
* Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
* Copyright (c) 2007 Red Hat
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*************************************************************************
*
* DESCRIPTION:
*
* This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
* adapters
*
* 08/06/97 hc - v1.01h
* - Support inic-940 and inic-935
* 09/26/97 hc - v1.01i
* - Make correction from J.W. Schultz suggestion
* 10/13/97 hc - Support reset function
* 10/21/97 hc - v1.01j
* - Support 32 LUN (SCSI 3)
* 01/14/98 hc - v1.01k
* - Fix memory allocation problem
* 03/04/98 hc - v1.01l
* - Fix tape rewind which will hang the system problem
* - Set can_queue to initio_num_scb
* 06/25/98 hc - v1.01m
* - Get it work for kernel version >= 2.1.75
* - Dynamic assign SCSI bus reset holding time in initio_init()
* 07/02/98 hc - v1.01n
* - Support 0002134A
* 08/07/98 hc - v1.01o
* - Change the initio_abort_srb routine to use scsi_done. <01>
* 09/07/98 hl - v1.02
* - Change the INI9100U define and proc_dir_entry to
* reflect the newer Kernel 2.1.118, but the v1.o1o
* should work with Kernel 2.1.118.
* 09/20/98 wh - v1.02a
* - Support Abort command.
* - Handle reset routine.
* 09/21/98 hl - v1.03
* - remove comments.
* 12/09/98 bv - v1.03a
* - Removed unused code
* 12/13/98 bv - v1.03b
* - Remove cli() locking for kernels >= 2.1.95. This uses
* spinlocks to serialize access to the pSRB_head and
* pSRB_tail members of the HCS structure.
* 09/01/99 bv - v1.03d
* - Fixed a deadlock problem in SMP.
* 21/01/99 bv - v1.03e
* - Add support for the Domex 3192U PCI SCSI
* This is a slightly modified patch by
* Brian Macy <bmacy@sunshinecomputing.com>
* 22/02/99 bv - v1.03f
* - Didn't detect the INIC-950 in 2.0.x correctly.
* Now fixed.
* 05/07/99 bv - v1.03g
* - Changed the assumption that HZ = 100
* 10/17/03 mc - v1.04
* - added new DMA API support
* 06/01/04 jmd - v1.04a
* - Re-add reset_bus support
**************************************************************************/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "initio.h"
#define SENSE_SIZE 14
#define i91u_MAXQUEUE 2
#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
#define I950_DEVICE_ID 0x9500 /* Initio's inic-950 product ID */
#define I940_DEVICE_ID 0x9400 /* Initio's inic-940 product ID */
#define I935_DEVICE_ID 0x9401 /* Initio's inic-935 product ID */
#define I920_DEVICE_ID 0x0002 /* Initio's other product ID */
#ifdef DEBUG_i91u
static unsigned int i91u_debug = DEBUG_DEFAULT;
#endif
static int initio_tag_enable = 1;
#ifdef DEBUG_i91u
static int setup_debug = 0;
#endif
static void i91uSCBPost(u8 * pHcb, u8 * pScb);
/* PCI Devices supported by this driver */
static struct pci_device_id i91u_pci_devices[] = {
{ PCI_VENDOR_ID_INIT, I950_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_INIT, I940_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_INIT, I935_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_INIT, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_DOMEX, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ }
};
MODULE_DEVICE_TABLE(pci, i91u_pci_devices);
#define DEBUG_INTERRUPT 0
#define DEBUG_QUEUE 0
#define DEBUG_STATE 0
#define INT_DISC 0
/*--- forward references ---*/
static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
static int tulip_main(struct initio_host * host);
static int initio_next_state(struct initio_host * host);
static int initio_state_1(struct initio_host * host);
static int initio_state_2(struct initio_host * host);
static int initio_state_3(struct initio_host * host);
static int initio_state_4(struct initio_host * host);
static int initio_state_5(struct initio_host * host);
static int initio_state_6(struct initio_host * host);
static int initio_state_7(struct initio_host * host);
static int initio_xfer_data_in(struct initio_host * host);
static int initio_xfer_data_out(struct initio_host * host);
static int initio_xpad_in(struct initio_host * host);
static int initio_xpad_out(struct initio_host * host);
static int initio_status_msg(struct initio_host * host);
static int initio_msgin(struct initio_host * host);
static int initio_msgin_sync(struct initio_host * host);
static int initio_msgin_accept(struct initio_host * host);
static int initio_msgout_reject(struct initio_host * host);
static int initio_msgin_extend(struct initio_host * host);
static int initio_msgout_ide(struct initio_host * host);
static int initio_msgout_abort_targ(struct initio_host * host);
static int initio_msgout_abort_tag(struct initio_host * host);
static int initio_bus_device_reset(struct initio_host * host);
static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
static int int_initio_busfree(struct initio_host * host);
static int int_initio_scsi_rst(struct initio_host * host);
static int int_initio_bad_seq(struct initio_host * host);
static int int_initio_resel(struct initio_host * host);
static int initio_sync_done(struct initio_host * host);
static int wdtr_done(struct initio_host * host);
static int wait_tulip(struct initio_host * host);
static int initio_wait_done_disc(struct initio_host * host);
static int initio_wait_disc(struct initio_host * host);
static void tulip_scsi(struct initio_host * host);
static int initio_post_scsi_rst(struct initio_host * host);
static void initio_se2_ew_en(unsigned long base);
static void initio_se2_ew_ds(unsigned long base);
static int initio_se2_rd_all(unsigned long base);
static void initio_se2_update_all(unsigned long base); /* setup default pattern */
static void initio_read_eeprom(unsigned long base);
/* ---- INTERNAL VARIABLES ---- */
static NVRAM i91unvram;
static NVRAM *i91unvramp;
static u8 i91udftNvRam[64] =
{
/*----------- header -----------*/
0x25, 0xc9, /* Signature */
0x40, /* Size */
0x01, /* Revision */
/* -- Host Adapter Structure -- */
0x95, /* ModelByte0 */
0x00, /* ModelByte1 */
0x00, /* ModelInfo */
0x01, /* NumOfCh */
NBC1_DEFAULT, /* BIOSConfig1 */
0, /* BIOSConfig2 */
0, /* HAConfig1 */
0, /* HAConfig2 */
/* SCSI channel 0 and target Structure */
7, /* SCSIid */
NCC1_DEFAULT, /* SCSIconfig1 */
0, /* SCSIconfig2 */
0x10, /* NumSCSItarget */
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
/* SCSI channel 1 and target Structure */
7, /* SCSIid */
NCC1_DEFAULT, /* SCSIconfig1 */
0, /* SCSIconfig2 */
0x10, /* NumSCSItarget */
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0}; /* - CheckSum - */
static u8 initio_rate_tbl[8] = /* fast 20 */
{
/* nanosecond devide by 4 */
12, /* 50ns, 20M */
18, /* 75ns, 13.3M */
25, /* 100ns, 10M */
31, /* 125ns, 8M */
37, /* 150ns, 6.6M */
43, /* 175ns, 5.7M */
50, /* 200ns, 5M */
62 /* 250ns, 4M */
};
static void initio_do_pause(unsigned amount)
{
/* Pause for amount jiffies */
unsigned long the_time = jiffies + amount;
while (time_before_eq(jiffies, the_time))
cpu_relax();
}
/*-- forward reference --*/
/******************************************************************
Input: instruction for Serial E2PROM
EX: se2_rd(0 call se2_instr() to send address and read command
StartBit OP_Code Address Data
--------- -------- ------------------ -------
1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
+-----------------------------------------------------
|
CS -----+
+--+ +--+ +--+ +--+ +--+
^ | ^ | ^ | ^ | ^ |
| | | | | | | | | |
CLK -------+ +--+ +--+ +--+ +--+ +--
(leading edge trigger)
+--1-----1--+
| SB OP | OP A5 A4
DI ----+ +--0------------------
(address and cmd sent to nvram)
-------------------------------------------+
|
DO +---
(data sent from nvram)
******************************************************************/
/**
* initio_se2_instr - bitbang an instruction
* @base: Base of InitIO controller
* @instr: Instruction for serial E2PROM
*
* Bitbang an instruction out to the serial E2Prom
*/
static void initio_se2_instr(unsigned long base, u8 instr)
{
int i;
u8 b;
outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
udelay(30);
outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
udelay(30);
for (i = 0; i < 8; i++) {
if (instr & 0x80)
b = SE2CS | SE2DO; /* -CLK+dataBit */
else
b = SE2CS; /* -CLK */
outb(b, base + TUL_NVRAM);
udelay(30);
outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
udelay(30);
instr <<= 1;
}
outb(SE2CS, base + TUL_NVRAM); /* -CLK */
udelay(30);
}
/**
* initio_se2_ew_en - Enable erase/write
* @base: Base address of InitIO controller
*
* Enable erase/write state of serial EEPROM
*/
void initio_se2_ew_en(unsigned long base)
{
initio_se2_instr(base, 0x30); /* EWEN */
outb(0, base + TUL_NVRAM); /* -CS */
udelay(30);
}
/**
* initio_se2_ew_ds - Disable erase/write
* @base: Base address of InitIO controller
*
* Disable erase/write state of serial EEPROM
*/
void initio_se2_ew_ds(unsigned long base)
{
initio_se2_instr(base, 0); /* EWDS */
outb(0, base + TUL_NVRAM); /* -CS */
udelay(30);
}
/**
* initio_se2_rd - read E2PROM word
* @base: Base of InitIO controller
* @addr: Address of word in E2PROM
*
* Read a word from the NV E2PROM device
*/
static u16 initio_se2_rd(unsigned long base, u8 addr)
{
u8 instr, rb;
u16 val = 0;
int i;
instr = (u8) (addr | 0x80);
initio_se2_instr(base, instr); /* READ INSTR */
for (i = 15; i >= 0; i--) {
outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
udelay(30);
outb(SE2CS, base + TUL_NVRAM); /* -CLK */
/* sample data after the following edge of clock */
rb = inb(base + TUL_NVRAM);
rb &= SE2DI;
val += (rb << i);
udelay(30); /* 6/20/95 */
}
outb(0, base + TUL_NVRAM); /* no chip select */
udelay(30);
return val;
}
/**
* initio_se2_wr - read E2PROM word
* @base: Base of InitIO controller
* @addr: Address of word in E2PROM
* @val: Value to write
*
* Write a word to the NV E2PROM device. Used when recovering from
* a problem with the NV.
*/
static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
{
u8 rb;
u8 instr;
int i;
instr = (u8) (addr | 0x40);
initio_se2_instr(base, instr); /* WRITE INSTR */
for (i = 15; i >= 0; i--) {
if (val & 0x8000)
outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
else
outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
udelay(30);
outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
udelay(30);
val <<= 1;
}
outb(SE2CS, base + TUL_NVRAM); /* -CLK */
udelay(30);
outb(0, base + TUL_NVRAM); /* -CS */
udelay(30);
outb(SE2CS, base + TUL_NVRAM); /* +CS */
udelay(30);
for (;;) {
outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
udelay(30);
outb(SE2CS, base + TUL_NVRAM); /* -CLK */
udelay(30);
if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
break; /* write complete */
}
outb(0, base + TUL_NVRAM); /* -CS */
}
/**
* initio_se2_rd_all - read hostadapter NV configuration
* @base: Base address of InitIO controller
*
* Reads the E2PROM data into main memory. Ensures that the checksum
* and header marker are valid. Returns 1 on success -1 on error.
*/
static int initio_se2_rd_all(unsigned long base)
{
int i;
u16 chksum = 0;
u16 *np;
i91unvramp = &i91unvram;
np = (u16 *) i91unvramp;
for (i = 0; i < 32; i++)
*np++ = initio_se2_rd(base, i);
/* Is signature "ini" ok ? */
if (i91unvramp->NVM_Signature != INI_SIGNATURE)
return -1;
/* Is ckecksum ok ? */
np = (u16 *) i91unvramp;
for (i = 0; i < 31; i++)
chksum += *np++;
if (i91unvramp->NVM_CheckSum != chksum)
return -1;
return 1;
}
/**
* initio_se2_update_all - Update E2PROM
* @base: Base of InitIO controller
*
* Update the E2PROM by wrting any changes into the E2PROM
* chip, rewriting the checksum.
*/
static void initio_se2_update_all(unsigned long base)
{ /* setup default pattern */
int i;
u16 chksum = 0;
u16 *np, *np1;
i91unvramp = &i91unvram;
/* Calculate checksum first */
np = (u16 *) i91udftNvRam;
for (i = 0; i < 31; i++)
chksum += *np++;
*np = chksum;
initio_se2_ew_en(base); /* Enable write */
np = (u16 *) i91udftNvRam;
np1 = (u16 *) i91unvramp;
for (i = 0; i < 32; i++, np++, np1++) {
if (*np != *np1)
initio_se2_wr(base, i, *np);
}
initio_se2_ew_ds(base); /* Disable write */
}
/**
* initio_read_eeprom - Retrieve configuration
* @base: Base of InitIO Host Adapter
*
* Retrieve the host adapter configuration data from E2Prom. If the
* data is invalid then the defaults are used and are also restored
* into the E2PROM. This forms the access point for the SCSI driver
* into the E2PROM layer, the other functions for the E2PROM are all
* internal use.
*
* Must be called single threaded, uses a shared global area.
*/
static void initio_read_eeprom(unsigned long base)
{
u8 gctrl;
i91unvramp = &i91unvram;
/* Enable EEProm programming */
gctrl = inb(base + TUL_GCTRL);
outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
if (initio_se2_rd_all(base) != 1) {
initio_se2_update_all(base); /* setup default pattern */
initio_se2_rd_all(base); /* load again */
}
/* Disable EEProm programming */
gctrl = inb(base + TUL_GCTRL);
outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
}
/**
* initio_stop_bm - stop bus master
* @host: InitIO we are stopping
*
* Stop any pending DMA operation, aborting the DMA if necessary
*/
static void initio_stop_bm(struct initio_host * host)
{
if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
/* wait Abort DMA xfer done */
while ((inb(host->addr + TUL_Int) & XABT) == 0)
cpu_relax();
}
outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
}
/**
* initio_reset_scsi - Reset SCSI host controller
* @host: InitIO host to reset
* @seconds: Recovery time
*
* Perform a full reset of the SCSI subsystem.
*/
static int initio_reset_scsi(struct initio_host * host, int seconds)
{
outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
cpu_relax();
/* reset tulip chip */
outb(0, host->addr + TUL_SSignal);
/* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
/* SONY 5200 tape drive won't work if only stall for 1 sec */
/* FIXME: this is a very long busy wait right now */
initio_do_pause(seconds * HZ);
inb(host->addr + TUL_SInt);
return SCSI_RESET_SUCCESS;
}
/**
* initio_init - set up an InitIO host adapter
* @host: InitIO host adapter
* @num_scbs: Number of SCBS
* @bios_addr: BIOS address
*
* Set up the host adapter and devices according to the configuration
* retrieved from the E2PROM.
*
* Locking: Calls E2PROM layer code which is not re-enterable so must
* run single threaded for now.
*/
static void initio_init(struct initio_host * host, u8 *bios_addr)
{
int i;
u8 *flags;
u8 *heads;
/* Get E2Prom configuration */
initio_read_eeprom(host->addr);
if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
host->max_tar = 8;
else
host->max_tar = 16;
host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
host->idmask = ~(1 << host->scsi_id);
#ifdef CHK_PARITY
/* Enable parity error response */
outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
#endif
/* Mask all the interrupt */
outb(0x1F, host->addr + TUL_Mask);
initio_stop_bm(host);
/* --- Initialize the tulip --- */
outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
/* program HBA's SCSI ID */
outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
/* Enable Initiator Mode ,phase latch,alternate sync period mode,
disable SCSI reset */
if (host->config & HCC_EN_PAR)
host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
else
host->sconf1 = (TSC_INITDEFAULT);
outb(host->sconf1, host->addr + TUL_SConfig);
/* Enable HW reselect */
outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
outb(0, host->addr + TUL_SPeriod);
/* selection time out = 250 ms */
outb(153, host->addr + TUL_STimeOut);
/* Enable SCSI terminator */
outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
host->addr + TUL_XCtrl);
outb(((host->config & HCC_AUTO_TERM) >> 4) |
(inb(host->addr + TUL_GCTRL1) & 0xFE),
host->addr + TUL_GCTRL1);
for (i = 0,
flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
heads = bios_addr + 0x180;
i < host->max_tar;
i++, flags++) {
host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
if (host->targets[i].flags & TCF_EN_255)
host->targets[i].drv_flags = TCF_DRV_255_63;
else
host->targets[i].drv_flags = 0;
host->targets[i].js_period = 0;
host->targets[i].sconfig0 = host->sconf1;
host->targets[i].heads = *heads++;
if (host->targets[i].heads == 255)
host->targets[i].drv_flags = TCF_DRV_255_63;
else
host->targets[i].drv_flags = 0;
host->targets[i].sectors = *heads++;
host->targets[i].flags &= ~TCF_BUSY;
host->act_tags[i] = 0;
host->max_tags[i] = 0xFF;
} /* for */
printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
host->addr, host->pci_dev->irq,
host->bios_addr, host->scsi_id);
/* Reset SCSI Bus */
if (host->config & HCC_SCSI_RESET) {
printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
initio_reset_scsi(host, 10);
}
outb(0x17, host->addr + TUL_SCFG1);
outb(0xE9, host->addr + TUL_SIntEnable);
}
/**
* initio_alloc_scb - Allocate an SCB
* @host: InitIO host we are allocating for
*
* Walk the SCB list for the controller and allocate a free SCB if
* one exists.
*/
static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
{
struct scsi_ctrl_blk *scb;
unsigned long flags;
spin_lock_irqsave(&host->avail_lock, flags);
if ((scb = host->first_avail) != NULL) {
#if DEBUG_QUEUE
printk("find scb at %p\n", scb);
#endif
if ((host->first_avail = scb->next) == NULL)
host->last_avail = NULL;
scb->next = NULL;
scb->status = SCB_RENT;
}
spin_unlock_irqrestore(&host->avail_lock, flags);
return scb;
}
/**
* initio_release_scb - Release an SCB
* @host: InitIO host that owns the SCB
* @cmnd: SCB command block being returned
*
* Return an allocated SCB to the host free list
*/
static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
{
unsigned long flags;
#if DEBUG_QUEUE
printk("Release SCB %p; ", cmnd);
#endif
spin_lock_irqsave(&(host->avail_lock), flags);
cmnd->srb = NULL;
cmnd->status = 0;
cmnd->next = NULL;
if (host->last_avail != NULL) {
host->last_avail->next = cmnd;
host->last_avail = cmnd;
} else {
host->first_avail = cmnd;
host->last_avail = cmnd;
}
spin_unlock_irqrestore(&(host->avail_lock), flags);
}
/***************************************************************************/
static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
{
#if DEBUG_QUEUE
printk("Append pend SCB %p; ", scbp);
#endif
scbp->status = SCB_PEND;
scbp->next = NULL;
if (host->last_pending != NULL) {
host->last_pending->next = scbp;
host->last_pending = scbp;
} else {
host->first_pending = scbp;
host->last_pending = scbp;
}
}
/***************************************************************************/
static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
{
#if DEBUG_QUEUE
printk("Push pend SCB %p; ", scbp);
#endif
scbp->status = SCB_PEND;
if ((scbp->next = host->first_pending) != NULL) {
host->first_pending = scbp;
} else {
host->first_pending = scbp;
host->last_pending = scbp;
}
}
static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
{
struct scsi_ctrl_blk *first;
first = host->first_pending;
while (first != NULL) {
if (first->opcode != ExecSCSI)
return first;
if (first->tagmsg == 0) {
if ((host->act_tags[first->target] == 0) &&
!(host->targets[first->target].flags & TCF_BUSY))
return first;
} else {
if ((host->act_tags[first->target] >=
host->max_tags[first->target]) |
(host->targets[first->target].flags & TCF_BUSY)) {
first = first->next;
continue;
}
return first;
}
first = first->next;
}
return first;
}
static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
{
struct scsi_ctrl_blk *tmp, *prev;
#if DEBUG_QUEUE
printk("unlink pend SCB %p; ", scb);
#endif
prev = tmp = host->first_pending;
while (tmp != NULL) {
if (scb == tmp) { /* Unlink this SCB */
if (tmp == host->first_pending) {
if ((host->first_pending = tmp->next) == NULL)
host->last_pending = NULL;
} else {
prev->next = tmp->next;
if (tmp == host->last_pending)
host->last_pending = prev;
}
tmp->next = NULL;
break;
}
prev = tmp;
tmp = tmp->next;
}
}
static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
{
#if DEBUG_QUEUE
printk("append busy SCB %p; ", scbp);
#endif
if (scbp->tagmsg)
host->act_tags[scbp->target]++;
else
host->targets[scbp->target].flags |= TCF_BUSY;
scbp->status = SCB_BUSY;
scbp->next = NULL;
if (host->last_busy != NULL) {
host->last_busy->next = scbp;
host->last_busy = scbp;
} else {
host->first_busy = scbp;
host->last_busy = scbp;
}
}
/***************************************************************************/
static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
{
struct scsi_ctrl_blk *tmp;
if ((tmp = host->first_busy) != NULL) {
if ((host->first_busy = tmp->next) == NULL)
host->last_busy = NULL;
tmp->next = NULL;
if (tmp->tagmsg)
host->act_tags[tmp->target]--;
else
host->targets[tmp->target].flags &= ~TCF_BUSY;
}
#if DEBUG_QUEUE
printk("Pop busy SCB %p; ", tmp);
#endif
return tmp;
}
/***************************************************************************/
static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
{
struct scsi_ctrl_blk *tmp, *prev;
#if DEBUG_QUEUE
printk("unlink busy SCB %p; ", scb);
#endif
prev = tmp = host->first_busy;
while (tmp != NULL) {
if (scb == tmp) { /* Unlink this SCB */
if (tmp == host->first_busy) {
if ((host->first_busy = tmp->next) == NULL)
host->last_busy = NULL;
} else {
prev->next = tmp->next;
if (tmp == host->last_busy)
host->last_busy = prev;
}
tmp->next = NULL;
if (tmp->tagmsg)
host->act_tags[tmp->target]--;
else
host->targets[tmp->target].flags &= ~TCF_BUSY;
break;
}
prev = tmp;
tmp = tmp->next;
}
return;
}
struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
{
struct scsi_ctrl_blk *tmp, *prev;
u16 scbp_tarlun;
prev = tmp = host->first_busy;
while (tmp != NULL) {
scbp_tarlun = (tmp->lun << 8) | (tmp->target);
if (scbp_tarlun == tarlun) { /* Unlink this SCB */
break;
}
prev = tmp;
tmp = tmp->next;
}
#if DEBUG_QUEUE
printk("find busy SCB %p; ", tmp);
#endif
return tmp;
}
static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
{
#if DEBUG_QUEUE
printk("append done SCB %p; ", scbp);
#endif
scbp->status = SCB_DONE;
scbp->next = NULL;
if (host->last_done != NULL) {
host->last_done->next = scbp;
host->last_done = scbp;
} else {
host->first_done = scbp;
host->last_done = scbp;
}
}
struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
{
struct scsi_ctrl_blk *tmp;
if ((tmp = host->first_done) != NULL) {
if ((host->first_done = tmp->next) == NULL)
host->last_done = NULL;
tmp->next = NULL;
}
#if DEBUG_QUEUE
printk("find done SCB %p; ",tmp);
#endif
return tmp;
}
static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
{
unsigned long flags;
struct scsi_ctrl_blk *tmp, *prev;
spin_lock_irqsave(&host->semaph_lock, flags);
if ((host->semaph == 0) && (host->active == NULL)) {
/* disable Jasmin SCSI Int */
outb(0x1F, host->addr + TUL_Mask);
spin_unlock_irqrestore(&host->semaph_lock, flags);
/* FIXME: synchronize_irq needed ? */
tulip_main(host);
spin_lock_irqsave(&host->semaph_lock, flags);
host->semaph = 1;
outb(0x0F, host->addr + TUL_Mask);
spin_unlock_irqrestore(&host->semaph_lock, flags);
return SCSI_ABORT_SNOOZE;
}
prev = tmp = host->first_pending; /* Check Pend queue */
while (tmp != NULL) {
/* 07/27/98 */
if (tmp->srb == srbp) {
if (tmp == host->active) {
spin_unlock_irqrestore(&host->semaph_lock, flags);
return SCSI_ABORT_BUSY;
} else if (tmp == host->first_pending) {
if ((host->first_pending = tmp->next) == NULL)
host->last_pending = NULL;
} else {
prev->next = tmp->next;
if (tmp == host->last_pending)
host->last_pending = prev;
}
tmp->hastat = HOST_ABORTED;
tmp->flags |= SCF_DONE;
if (tmp->flags & SCF_POST)
(*tmp->post) ((u8 *) host, (u8 *) tmp);
spin_unlock_irqrestore(&host->semaph_lock, flags);
return SCSI_ABORT_SUCCESS;
}
prev = tmp;
tmp = tmp->next;
}
prev = tmp = host->first_busy; /* Check Busy queue */
while (tmp != NULL) {
if (tmp->srb == srbp) {
if (tmp == host->active) {
spin_unlock_irqrestore(&host->semaph_lock, flags);
return SCSI_ABORT_BUSY;