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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [eata_dma.c] - Blame information for rev 1626

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/************************************************************
 *                                                          *
 *                  Linux EATA SCSI driver                  *
 *                                                          *
 *  based on the CAM document CAM/89-004 rev. 2.0c,         *
 *  DPT's driver kit, some internal documents and source,   *
 *  and several other Linux scsi drivers and kernel docs.   *
 *                                                          *
 *  The driver currently:                                   *
 *      -supports all ISA based EATA-DMA boards             *
 *       like PM2011, PM2021, PM2041, PM3021                *
 *      -supports all EISA based EATA-DMA boards            *
 *       like PM2012B, PM2022, PM2122, PM2322, PM2042,      *
 *            PM3122, PM3222, PM3332                        *
 *      -supports all PCI based EATA-DMA boards             *
 *       like PM2024, PM2124, PM2044, PM2144, PM3224,       *
 *            PM3334                                        *
 *      -supports the Wide, Ultra Wide and Differential     *
 *       versions of the boards                             *
 *      -supports multiple HBAs with & without IRQ sharing  *
 *      -supports all SCSI channels on multi channel boards *
 *      -supports ix86 and MIPS, untested on ALPHA          *
 *      -needs identical IDs on all channels of a HBA       *
 *      -can be loaded as module                            *
 *      -displays statistical and hardware information      *
 *       in /proc/scsi/eata_dma                             *
 *      -provides rudimentary latency measurement           *
 *       possibilities via /proc/scsi/eata_dma/<hostnum>    *
 *                                                          *
 *  (c)1993-96 Michael Neuffer                              *
 *             mike@i-Connect.Net                           *
 *             neuffer@mail.uni-mainz.de                    *
 *                                                          *
 *  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 of the License, 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 kernel; if not, write to *
 *  the Free Software Foundation, Inc., 675 Mass Ave,       *
 *  Cambridge, MA 02139, USA.                               *
 *                                                          *
 * I have to thank DPT for their excellent support. I took  *
 * me almost a year and a stopover at their HQ, on my first *
 * trip to the USA, to get it, but since then they've been  *
 * very helpful and tried to give me all the infos and      *
 * support I need.                                          *
 *                                                          *
 * Thanks also to Simon Shapiro, Greg Hosler and Mike       *
 * Jagdis who did a lot of testing and found quite a number *
 * of bugs during the development.                          *
 ************************************************************
 *  last change: 96/10/21                 OS: Linux 2.0.23  *
 ************************************************************/
 
/* Look in eata_dma.h for configuration and revision information */
 
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/malloc.h>
#include <linux/in.h>
#include <linux/bios32.h>
#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <asm/byteorder.h>
#include <asm/types.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/pgtable.h>
#ifdef __mips__
#include <asm/cachectl.h>
#endif
#include <linux/blk.h>
#include "scsi.h"
#include "sd.h"
#include "hosts.h"
#include "eata_dma.h"
#include "eata_dma_proc.h" 
 
#include <linux/stat.h>
#include <linux/config.h>       /* for CONFIG_PCI */
 
struct proc_dir_entry proc_scsi_eata_dma = {
    PROC_SCSI_EATA, 8, "eata_dma",
    S_IFDIR | S_IRUGO | S_IXUGO, 2
};
 
static u32 ISAbases[] =
{0x1F0, 0x170, 0x330, 0x230};
static unchar EISAbases[] =
{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
static uint registered_HBAs = 0;
static struct Scsi_Host *last_HBA = NULL;
static struct Scsi_Host *first_HBA = NULL;
static unchar reg_IRQ[] =
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
static unchar reg_IRQL[] =
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
static struct eata_sp *status = 0;   /* Statuspacket array   */
static void *dma_scratch = 0;
 
static struct eata_register *fake_int_base;
static int fake_int_result;
static int fake_int_happened;
 
static ulong int_counter = 0;
static ulong queue_counter = 0;
 
void eata_scsi_done (Scsi_Cmnd * scmd)
{
    scmd->request.rq_status = RQ_SCSI_DONE;
 
    if (scmd->request.sem != NULL)
        up(scmd->request.sem);
 
    return;
}
 
void eata_fake_int_handler(s32 irq, void *dev_id, struct pt_regs * regs)
{
    fake_int_result = inb((ulong)fake_int_base + HA_RSTATUS);
    fake_int_happened = TRUE;
    DBG(DBG_INTR3, printk("eata_fake_int_handler called irq%d base %p"
                          " res %#x\n", irq, fake_int_base, fake_int_result));
    return;
}
 
#include "eata_dma_proc.c"
 
#ifdef MODULE
int eata_release(struct Scsi_Host *sh)
{
    uint i;
    if (sh->irq && reg_IRQ[sh->irq] == 1) free_irq(sh->irq, NULL);
    else reg_IRQ[sh->irq]--;
 
    scsi_init_free((void *)status, 512);
    scsi_init_free((void *)dma_scratch - 4, 1024);
    for (i = 0; i < sh->can_queue; i++){ /* Free all SG arrays */
        if(SD(sh)->ccb[i].sg_list != NULL)
            scsi_init_free((void *) SD(sh)->ccb[i].sg_list,
                           sh->sg_tablesize * sizeof(struct eata_sg_list));
    }
 
    if (SD(sh)->channel == 0) {
        if (sh->dma_channel != BUSMASTER) free_dma(sh->dma_channel);
        if (sh->io_port && sh->n_io_port)
            release_region(sh->io_port, sh->n_io_port);
    }
    return(TRUE);
}
#endif
 
 
inline void eata_latency_in(struct eata_ccb *cp, hostdata *hd)
{
    uint time;
    time = jiffies - cp->timestamp;
    if(hd->all_lat[1] > time)
        hd->all_lat[1] = time;
    if(hd->all_lat[2] < time)
        hd->all_lat[2] = time;
    hd->all_lat[3] += time;
    hd->all_lat[0]++;
    if((cp->rw_latency) == WRITE) { /* was WRITE */
        if(hd->writes_lat[cp->sizeindex][1] > time)
            hd->writes_lat[cp->sizeindex][1] = time;
        if(hd->writes_lat[cp->sizeindex][2] < time)
            hd->writes_lat[cp->sizeindex][2] = time;
        hd->writes_lat[cp->sizeindex][3] += time;
        hd->writes_lat[cp->sizeindex][0]++;
    } else if((cp->rw_latency) == READ) {
        if(hd->reads_lat[cp->sizeindex][1] > time)
            hd->reads_lat[cp->sizeindex][1] = time;
        if(hd->reads_lat[cp->sizeindex][2] < time)
            hd->reads_lat[cp->sizeindex][2] = time;
        hd->reads_lat[cp->sizeindex][3] += time;
        hd->reads_lat[cp->sizeindex][0]++;
    }
}
 
inline void eata_latency_out(struct eata_ccb *cp, Scsi_Cmnd *cmd)
{
    int x, z;
    short *sho;
    long *lon;
    x = 0;                               /* just to keep GCC quiet */
    cp->timestamp = jiffies;            /* For latency measurements */
    switch(cmd->cmnd[0]) {
    case WRITE_6:
        x = cmd->cmnd[4]/2;
        cp->rw_latency = WRITE;
        break;
    case READ_6:
        x = cmd->cmnd[4]/2;
        cp->rw_latency = READ;
        break;
    case WRITE_10:
        sho = (short *) &cmd->cmnd[7];
        x = ntohs(*sho)/2;
        cp->rw_latency = WRITE;
        break;
    case READ_10:
        sho = (short *) &cmd->cmnd[7];
        x = ntohs(*sho)/2;
        cp->rw_latency = READ;
        break;
    case WRITE_12:
        lon = (long *) &cmd->cmnd[6];
        x = ntohl(*lon)/2;
        cp->rw_latency = WRITE;
        break;
    case READ_12:
        lon = (long *) &cmd->cmnd[6];
        x = ntohl(*lon)/2;
        cp->rw_latency = READ;
        break;
    default:
        cp->rw_latency = OTHER;
        break;
    }
    if (cmd->cmnd[0] == WRITE_6 || cmd->cmnd[0] == WRITE_10 ||
        cmd->cmnd[0] == WRITE_12 || cmd->cmnd[0] == READ_6 ||
        cmd->cmnd[0] == READ_10 || cmd->cmnd[0] == READ_12) {
        for(z = 0; (x > (1 << z)) && (z <= 11); z++)
            /* nothing */;
        cp->sizeindex = z;
    }
}
 
 
void eata_int_handler(int irq, void *dev_id, struct pt_regs * regs)
{
    uint i, result = 0;
    uint hba_stat, scsi_stat, eata_stat;
    Scsi_Cmnd *cmd;
    struct eata_ccb *ccb;
    struct eata_sp *sp;
    uint base;
    uint x;
    struct Scsi_Host *sh;
 
    for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->next) {
        if (sh->irq != irq)
            continue;
 
        while(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ) {
 
            int_counter++;
 
            sp = &SD(sh)->sp;
#ifdef __mips__
            sys_cacheflush(sp, sizeof(struct eata_sp), 2);
#endif
            ccb = sp->ccb;
 
            if(ccb == NULL) {
                eata_stat = inb((uint)sh->base + HA_RSTATUS);
                printk("eata_dma: int_handler, Spurious IRQ %d "
                       "received. CCB pointer not set.\n", irq);
                break;
            }
 
            cmd = ccb->cmd;
            base = (uint) cmd->host->base;
            hba_stat = sp->hba_stat;
 
            scsi_stat = (sp->scsi_stat >> 1) & 0x1f;
 
            if (sp->EOC == FALSE) {
                eata_stat = inb(base + HA_RSTATUS);
                printk(KERN_WARNING "eata_dma: int_handler, board: %x cmd %lx "
                       "returned unfinished.\n"
                       "EATA: %x HBA: %x SCSI: %x spadr %lx spadrirq %lx, "
                       "irq%d\n", base, (long)ccb, eata_stat, hba_stat,
                       scsi_stat,(long)&status, (long)&status[irq], irq);
                cmd->result = DID_ERROR << 16;
                ccb->status = FREE;
                cmd->scsi_done(cmd);
                break;
            }
 
           sp->EOC = FALSE; /* Clean out this flag */
 
           if (ccb->status == LOCKED || ccb->status == RESET) {
               printk("eata_dma: int_handler, reseted command pid %ld returned"
                      "\n", cmd->pid);
               DBG(DBG_INTR && DBG_DELAY, DELAY(1));
            }
 
            eata_stat = inb(base + HA_RSTATUS);
            DBG(DBG_INTR, printk("IRQ %d received, base %#.4x, pid %ld, "
                                 "target: %x, lun: %x, ea_s: %#.2x, hba_s: "
                                 "%#.2x \n", irq, base, cmd->pid, cmd->target,
                                 cmd->lun, eata_stat, hba_stat));
 
            switch (hba_stat) {
            case HA_NO_ERROR:   /* NO Error */
                if(HD(cmd)->do_latency == TRUE && ccb->timestamp)
                    eata_latency_in(ccb, HD(cmd));
                result = DID_OK << 16;
                break;
            case HA_ERR_SEL_TO:         /* Selection Timeout */
            case HA_ERR_CMD_TO:         /* Command Timeout   */
                result = DID_TIME_OUT << 16;
                break;
            case HA_BUS_RESET:          /* SCSI Bus Reset Received */
                result = DID_RESET << 16;
                DBG(DBG_STATUS, printk(KERN_WARNING "scsi%d: BUS RESET "
                                       "received on cmd %ld\n",
                                       HD(cmd)->HBA_number, cmd->pid));
                break;
            case HA_INIT_POWERUP:       /* Initial Controller Power-up */
                if (cmd->device->type != TYPE_TAPE)
                    result = DID_BUS_BUSY << 16;
                else
                    result = DID_ERROR << 16;
 
                for (i = 0; i < MAXTARGET; i++)
                DBG(DBG_STATUS, printk(KERN_DEBUG "scsi%d: cmd pid %ld "
                                       "returned with INIT_POWERUP\n",
                                       HD(cmd)->HBA_number, cmd->pid));
                break;
            case HA_CP_ABORT_NA:
            case HA_CP_ABORTED:
                result = DID_ABORT << 16;
                DBG(DBG_STATUS, printk(KERN_WARNING "scsi%d: aborted cmd "
                                       "returned\n", HD(cmd)->HBA_number));
                break;
            case HA_CP_RESET_NA:
            case HA_CP_RESET:
                HD(cmd)->resetlevel[cmd->channel] = 0;
                result = DID_RESET << 16;
                DBG(DBG_STATUS, printk(KERN_WARNING "scsi%d: reseted cmd "
                                       "pid %ldreturned\n",
                                       HD(cmd)->HBA_number, cmd->pid));
            case HA_SCSI_HUNG:          /* SCSI Hung                 */
                printk(KERN_ERR "scsi%d: SCSI hung\n", HD(cmd)->HBA_number);
                result = DID_ERROR << 16;
                break;
            case HA_RSENSE_FAIL:        /* Auto Request-Sense Failed */
                DBG(DBG_STATUS, printk(KERN_ERR "scsi%d: Auto Request Sense "
                                       "Failed\n", HD(cmd)->HBA_number));
                result = DID_ERROR << 16;
                break;
            case HA_UNX_BUSPHASE:       /* Unexpected Bus Phase */
            case HA_UNX_BUS_FREE:       /* Unexpected Bus Free */
            case HA_BUS_PARITY:         /* Bus Parity Error */
            case HA_UNX_MSGRJCT:        /* Unexpected Message Reject */
            case HA_RESET_STUCK:        /* SCSI Bus Reset Stuck */
            case HA_PARITY_ERR:         /* Controller Ram Parity */
            default:
                result = DID_ERROR << 16;
                break;
            }
            cmd->result = result | (scsi_stat << 1);
 
#if DBG_INTR2
            if (scsi_stat || result || hba_stat || eata_stat != 0x50
                || cmd->scsi_done == NULL || cmd->device->id == 7)
                printk("HBA: %d, channel %d, id: %d, lun %d, pid %ld:\n"
                       "eata_stat %#x, hba_stat %#.2x, scsi_stat %#.2x, "
                       "sense_key: %#x, result: %#.8x\n", x,
                       cmd->device->channel, cmd->device->id, cmd->device->lun,
                       cmd->pid, eata_stat, hba_stat, scsi_stat,
                       cmd->sense_buffer[2] & 0xf, cmd->result);
            DBG(DBG_INTR&&DBG_DELAY,DELAY(1));
#endif
 
            ccb->status = FREE;     /* now we can release the slot  */
            cmd->scsi_done(cmd);
        }
    }
 
    return;
}
 
inline int eata_send_command(u32 addr, u32 base, u8 command)
{
    long loop = R_LIMIT;
 
    while (inb(base + HA_RAUXSTAT) & HA_ABUSY)
        if (--loop == 0)
            return(FALSE);
 
    if(addr != (u32) NULL)
        addr = virt_to_bus((void *)addr);
 
    /*
     * This is overkill.....but the MIPSen seem to need this
     * and it will be optimized away for i86 and ALPHA machines.
     */
    flush_cache_all();
 
    /* And now the address in nice little byte chunks */
#ifdef __LITTLE_ENDIAN
    outb(addr,       base + HA_WDMAADDR);
    outb(addr >> 8,  base + HA_WDMAADDR + 1);
    outb(addr >> 16, base + HA_WDMAADDR + 2);
    outb(addr >> 24, base + HA_WDMAADDR + 3);
#else
    outb(addr >> 24, base + HA_WDMAADDR);
    outb(addr >> 16, base + HA_WDMAADDR + 1);
    outb(addr >> 8,  base + HA_WDMAADDR + 2);
    outb(addr,       base + HA_WDMAADDR + 3);
#endif
    outb(command, base + HA_WCOMMAND);
    return(TRUE);
}
 
inline int eata_send_immediate(u32 base, u32 addr, u8 ifc, u8 code, u8 code2)
{
    if(addr != (u32) NULL)
        addr = virt_to_bus((void *)addr);
 
    /*
     * This is overkill.....but the MIPSen seem to need this
     * and it will be optimized away for i86 and ALPHA machines.
     */
    flush_cache_all();
 
    outb(0x0, base + HA_WDMAADDR - 1);
    if(addr){
#ifdef __LITTLE_ENDIAN
        outb(addr,       base + HA_WDMAADDR);
        outb(addr >> 8,  base + HA_WDMAADDR + 1);
        outb(addr >> 16, base + HA_WDMAADDR + 2);
        outb(addr >> 24, base + HA_WDMAADDR + 3);
#else
        outb(addr >> 24, base + HA_WDMAADDR);
        outb(addr >> 16, base + HA_WDMAADDR + 1);
        outb(addr >> 8,  base + HA_WDMAADDR + 2);
        outb(addr,       base + HA_WDMAADDR + 3);
#endif
    } else {
        outb(0x0, base + HA_WDMAADDR);
        outb(0x0, base + HA_WDMAADDR + 1);
        outb(code2, base + HA_WCODE2);
        outb(code,  base + HA_WCODE);
    }
 
    outb(ifc, base + HA_WIFC);
    outb(EATA_CMD_IMMEDIATE, base + HA_WCOMMAND);
    return(TRUE);
}
 
int eata_queue(Scsi_Cmnd * cmd, void (* done) (Scsi_Cmnd *))
{
    unsigned int i, x, y;
    ulong flags;
    hostdata *hd;
    struct Scsi_Host *sh;
    struct eata_ccb *ccb;
    struct scatterlist *sl;
 
 
    save_flags(flags);
    cli();
 
#if 0
    for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->next) {
      if(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ) {
            printk("eata_dma: scsi%d interrupt pending in eata_queue.\n"
                   "          Calling interrupt handler.\n", sh->host_no);
            eata_int_handler(sh->irq, 0, 0);
      }
    }
#endif
 
    queue_counter++;
 
    hd = HD(cmd);
    sh = cmd->host;
 
    if (cmd->cmnd[0] == REQUEST_SENSE && cmd->sense_buffer[0] != 0) {
        DBG(DBG_REQSENSE, printk(KERN_DEBUG "Tried to REQUEST SENSE\n"));
        cmd->result = DID_OK << 16;
        done(cmd);
 
        return(0);
    }
 
    /* check for free slot */
    for (y = hd->last_ccb + 1, x = 0; x < sh->can_queue; x++, y++) {
        if (y >= sh->can_queue)
            y = 0;
        if (hd->ccb[y].status == FREE)
            break;
    }
 
    hd->last_ccb = y;
 
    if (x >= sh->can_queue) {
        cmd->result = DID_BUS_BUSY << 16;
        DBG(DBG_QUEUE && DBG_ABNORM,
            printk(KERN_CRIT "eata_queue pid %ld, HBA QUEUE FULL..., "
                   "returning DID_BUS_BUSY\n", cmd->pid));
        done(cmd);
        restore_flags(flags);
        return(0);
    }
    ccb = &hd->ccb[y];
 
    memset(ccb, 0, sizeof(struct eata_ccb) - sizeof(struct eata_sg_list *));
 
    ccb->status = USED;                 /* claim free slot */
 
    restore_flags(flags);
 
    DBG(DBG_QUEUE, printk("eata_queue pid %ld, target: %x, lun: %x, y %d\n",
                          cmd->pid, cmd->target, cmd->lun, y));
    DBG(DBG_QUEUE && DBG_DELAY, DELAY(1));
 
    if(hd->do_latency == TRUE)
        eata_latency_out(ccb, cmd);
 
    cmd->scsi_done = (void *)done;
 
    switch (cmd->cmnd[0]) {
    case CHANGE_DEFINITION: case COMPARE:         case COPY:
    case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
    case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
    case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
    case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
    case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
    case UPDATE_BLOCK:      case WRITE_LONG:      case WRITE_SAME:
    case SEARCH_HIGH_12:    case SEARCH_EQUAL_12: case SEARCH_LOW_12:
    case WRITE_12:          case WRITE_VERIFY_12: case SET_WINDOW:
    case MEDIUM_SCAN:       case SEND_VOLUME_TAG:
    case 0xea:      /* alternate number for WRITE LONG */
        ccb->DataOut = TRUE;    /* Output mode */
        break;
    case TEST_UNIT_READY:
    default:
        ccb->DataIn = TRUE;     /* Input mode  */
    }
 
    /* FIXME: This will have to be changed once the midlevel driver
     *        allows different HBA IDs on every channel.
     */
    if (cmd->target == sh->this_id)
        ccb->Interpret = TRUE;  /* Interpret command */
 
    if (cmd->use_sg) {
        ccb->scatter = TRUE;    /* SG mode     */
        if (ccb->sg_list == NULL) {
            ccb->sg_list = kmalloc(sh->sg_tablesize * sizeof(struct eata_sg_list),
                                  GFP_ATOMIC | GFP_DMA);
        }
        if (ccb->sg_list == NULL)
            panic("eata_dma: Run out of DMA memory for SG lists !\n");
        ccb->cp_dataDMA = htonl(virt_to_bus(ccb->sg_list));
 
        ccb->cp_datalen = htonl(cmd->use_sg * sizeof(struct eata_sg_list));
        sl=(struct scatterlist *)cmd->request_buffer;
        for(i = 0; i < cmd->use_sg; i++, sl++){
            ccb->sg_list[i].data = htonl(virt_to_bus(sl->address));
            ccb->sg_list[i].len = htonl((u32) sl->length);
        }
    } else {
        ccb->scatter = FALSE;
        ccb->cp_datalen = htonl(cmd->request_bufflen);
        ccb->cp_dataDMA = htonl(virt_to_bus(cmd->request_buffer));
    }
 
    ccb->Auto_Req_Sen = TRUE;
    ccb->cp_reqDMA = htonl(virt_to_bus(cmd->sense_buffer));
    ccb->reqlen = sizeof(cmd->sense_buffer);
 
    ccb->cp_id = cmd->target;
    ccb->cp_channel = cmd->channel;
    ccb->cp_lun = cmd->lun;
    ccb->cp_dispri = TRUE;
    ccb->cp_identify = TRUE;
    memcpy(ccb->cp_cdb, cmd->cmnd, cmd->cmd_len);
 
    ccb->cp_statDMA = htonl(virt_to_bus(&(hd->sp)));
 
    ccb->cp_viraddr = ccb; /* This will be passed thru, so we don't need to
                            * convert it */
    ccb->cmd = cmd;
    cmd->host_scribble = (char *)&hd->ccb[y];
 
    if(eata_send_command((u32) ccb, (u32) sh->base, EATA_CMD_DMA_SEND_CP) == FALSE) {
        cmd->result = DID_BUS_BUSY << 16;
        DBG(DBG_QUEUE && DBG_ABNORM,
            printk("eata_queue target %d, pid %ld, HBA busy, "
                   "returning DID_BUS_BUSY\n",cmd->target, cmd->pid));
        ccb->status = FREE;
        done(cmd);
        return(0);
    }
    DBG(DBG_QUEUE, printk("Queued base %#.4x pid: %ld target: %x lun: %x "
                         "slot %d irq %d\n", (s32)sh->base, cmd->pid,
                         cmd->target, cmd->lun, y, sh->irq));
    DBG(DBG_QUEUE && DBG_DELAY, DELAY(1));
 
    return(0);
}
 
 
int eata_abort(Scsi_Cmnd * cmd)
{
    ulong loop = HZ / 2;
    ulong flags;
    int x;
    struct Scsi_Host *sh;
 
    save_flags(flags);
    cli();
 
    DBG(DBG_ABNORM, printk("eata_abort called pid: %ld target: %x lun: %x"
                           " reason %x\n", cmd->pid, cmd->target, cmd->lun,
                           cmd->abort_reason));
    DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
 
    /* Some interrupt controllers seem to loose interrupts */
    for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->next) {
        if(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ) {
            printk("eata_dma: scsi%d interrupt pending in eata_abort.\n"
                   "          Calling interrupt handler.\n", sh->host_no);
            eata_int_handler(sh->irq, 0, 0);
        }
    }
 
    while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY) {
        if (--loop == 0) {
            printk("eata_dma: abort, timeout error.\n");
            DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
            restore_flags(flags);
            return (SCSI_ABORT_ERROR);
        }
    }
    if (CD(cmd)->status == RESET) {
        printk("eata_dma: abort, command reset error.\n");
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
        restore_flags(flags);
        return (SCSI_ABORT_ERROR);
    }
    if (CD(cmd)->status == LOCKED) {
        DBG(DBG_ABNORM, printk("eata_dma: abort, queue slot locked.\n"));
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
        restore_flags(flags);
        return (SCSI_ABORT_NOT_RUNNING);
    }
    if (CD(cmd)->status == USED) {
        DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_BUSY\n"));
        restore_flags(flags);
        return (SCSI_ABORT_BUSY);  /* SNOOZE */
    }
    if (CD(cmd)->status == FREE) {
        DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_NOT_RUNNING\n"));
        restore_flags(flags);
        return (SCSI_ABORT_NOT_RUNNING);
    }
    restore_flags(flags);
    panic("eata_dma: abort: invalid slot status\n");
}
 
int eata_reset(Scsi_Cmnd * cmd, unsigned int resetflags)
{
    uint x;
    ulong loop = loops_per_sec / 3;
    ulong flags;
    unchar success = FALSE;
    Scsi_Cmnd *sp;
    struct Scsi_Host *sh;
 
    save_flags(flags);
    cli();
 
    DBG(DBG_ABNORM, printk("eata_reset called pid:%ld target: %x lun: %x"
                           " reason %x\n", cmd->pid, cmd->target, cmd->lun,
                           cmd->abort_reason));
 
    for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->next) {
        if(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ) {
            printk("eata_dma: scsi%d interrupt pending in eata_reset.\n"
                   "          Calling interrupt handler.\n", sh->host_no);
            eata_int_handler(sh->irq, 0, 0);
      }
    }
 
    if (HD(cmd)->state == RESET) {
        printk("eata_reset: exit, already in reset.\n");
        restore_flags(flags);
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
        return (SCSI_RESET_ERROR);
    }
 
    while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
        if (--loop == 0) {
            printk("eata_reset: exit, timeout error.\n");
            restore_flags(flags);
            DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
            return (SCSI_RESET_ERROR);
        }
 
    for (x = 0; x < cmd->host->can_queue; x++) {
        if (HD(cmd)->ccb[x].status == FREE)
            continue;
 
        if (HD(cmd)->ccb[x].status == LOCKED) {
            HD(cmd)->ccb[x].status = FREE;
            printk("eata_reset: locked slot %d forced free.\n", x);
            DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
            continue;
        }
 
 
        sp = HD(cmd)->ccb[x].cmd;
        HD(cmd)->ccb[x].status = RESET;
 
        if (sp == NULL)
            panic("eata_reset: slot %d, sp==NULL.\n", x);
 
        printk("eata_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
 
        if (sp == cmd)
            success = TRUE;
    }
 
    /* hard reset the HBA  */
    inb((u32) (cmd->host->base) + HA_RSTATUS);  /* This might cause trouble */
    eata_send_command(0, (u32) cmd->host->base, EATA_CMD_RESET);
 
    HD(cmd)->state = RESET;
 
    DBG(DBG_ABNORM, printk("eata_reset: board reset done, enabling "
                           "interrupts.\n"));
 
    DELAY(2); /* In theorie we should get interrupts and set free all
               * used queueslots */
 
    DBG(DBG_ABNORM, printk("eata_reset: interrupts disabled again.\n"));
    DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
 
    for (x = 0; x < cmd->host->can_queue; x++) {
 
        /* Skip slots already set free by interrupt and those that
         * are still LOCKED from the last reset */
        if (HD(cmd)->ccb[x].status != RESET)
            continue;
 
        sp = HD(cmd)->ccb[x].cmd;
        sp->result = DID_RESET << 16;
 
        /* This mailbox is still waiting for its interrupt */
        HD(cmd)->ccb[x].status = LOCKED;
 
        printk("eata_reset: slot %d locked, DID_RESET, pid %ld done.\n",
               x, sp->pid);
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
 
        sp->scsi_done(sp);
    }
 
    HD(cmd)->state = FALSE;
    restore_flags(flags);
 
    if (success) {
        DBG(DBG_ABNORM, printk("eata_reset: exit, pending.\n"));
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
        return (SCSI_RESET_PENDING);
    } else {
        DBG(DBG_ABNORM, printk("eata_reset: exit, wakeup.\n"));
        DBG(DBG_ABNORM && DBG_DELAY, DELAY(1));
        return (SCSI_RESET_PUNT);
    }
}
 
/* Here we try to determine the optimum queue depth for
 * each attached device.
 *
 * At the moment the algorithm is rather simple
 */
static void eata_select_queue_depths(struct Scsi_Host *host,
                                     Scsi_Device *devicelist)
{
    Scsi_Device *device;
    int devcount = 0;
    int factor = 0;
 
#if CRIPPLE_QUEUE    
    for(device = devicelist; device != NULL; device = device->next) {
        if(device->host == host)
            device->queue_depth = 2;
    }
#else
    /* First we do a sample run go find out what we have */
    for(device = devicelist; device != NULL; device = device->next) {
        if (device->host == host) {
            devcount++;
            switch(device->type) {
            case TYPE_DISK:
            case TYPE_MOD:
                factor += TYPE_DISK_QUEUE;
                break;
            case TYPE_TAPE:
                factor += TYPE_TAPE_QUEUE;
                break;
            case TYPE_WORM:
            case TYPE_ROM:
                factor += TYPE_ROM_QUEUE;
                break;
            case TYPE_PROCESSOR:
            case TYPE_SCANNER:
            default:
                factor += TYPE_OTHER_QUEUE;
                break;
            }
        }
    }
 
    DBG(DBG_REGISTER, printk(KERN_DEBUG "scsi%d: needed queueslots %d\n",
                             host->host_no, factor));
 
    if(factor == 0)    /* We don't want to get a DIV BY ZERO error */
        factor = 1;
 
    factor = (SD(host)->queuesize * 10) / factor;
 
    DBG(DBG_REGISTER, printk(KERN_DEBUG "scsi%d: using factor %dE-1\n",
                             host->host_no, factor));
 
    /* Now that have the factor we can set the individual queuesizes */
    for(device = devicelist; device != NULL; device = device->next) {
        if(device->host == host) {
            if(SD(device->host)->bustype != IS_ISA){
                switch(device->type) {
                case TYPE_DISK:
                case TYPE_MOD:
                    device->queue_depth = (TYPE_DISK_QUEUE * factor) / 10;
                    break;
                case TYPE_TAPE:
                    device->queue_depth = (TYPE_TAPE_QUEUE * factor) / 10;
                    break;
                case TYPE_WORM:
                case TYPE_ROM:
                    device->queue_depth = (TYPE_ROM_QUEUE * factor) / 10;
                    break;
                case TYPE_PROCESSOR:
                case TYPE_SCANNER:
                default:
                    device->queue_depth = (TYPE_OTHER_QUEUE * factor) / 10;
                    break;
                }
            } else /* ISA forces us to limit the queue depth because of the
                    * bounce buffer memory overhead. I know this is cruel */
                device->queue_depth = 2;
 
            /*
             * It showed that we need to set an upper limit of commands
             * we can allow to  queue for a single device on the bus.
             * If we get above that limit, the broken midlevel SCSI code
             * will produce bogus timeouts and aborts en masse. :-(
             */
            if(device->queue_depth > UPPER_DEVICE_QUEUE_LIMIT)
                device->queue_depth = UPPER_DEVICE_QUEUE_LIMIT;
            if(device->queue_depth == 0)
                device->queue_depth = 1;
 
            printk(KERN_INFO "scsi%d: queue depth for target %d on channel %d "
                   "set to %d\n", host->host_no, device->id, device->channel,
                   device->queue_depth);
        }
    }
#endif
}
 
#if CHECK_BLINK
int check_blink_state(long base)
{
    ushort loops = 10;
    u32 blinkindicator;
    u32 state = 0x12345678;
    u32 oldstate = 0;
 
    blinkindicator = htonl(0x54504442);
    while ((loops--) && (state != oldstate)) {
        oldstate = state;
        state = inl((uint) base + 1);
    }
 
    DBG(DBG_BLINK, printk("Did Blink check. Status: %d\n",
              (state == oldstate) && (state == blinkindicator)));
 
    if ((state == oldstate) && (state == blinkindicator))
        return(TRUE);
    else
        return (FALSE);
}
#endif
 
char * get_board_data(u32 base, u32 irq, u32 id)
{
    struct eata_ccb *cp;
    struct eata_sp  *sp;
    static char *buff;
    ulong i;
 
    cp = (struct eata_ccb *) scsi_init_malloc(sizeof(struct eata_ccb),
                                              GFP_ATOMIC | GFP_DMA);
    sp = (struct eata_sp *) scsi_init_malloc(sizeof(struct eata_sp),
                                             GFP_ATOMIC | GFP_DMA);
 
    buff = dma_scratch;
 
    memset(cp, 0, sizeof(struct eata_ccb));
    memset(sp, 0, sizeof(struct eata_sp));
    memset(buff, 0, 256);
 
    cp->DataIn = TRUE;
    cp->Interpret = TRUE;   /* Interpret command */
    cp->cp_dispri = TRUE;
    cp->cp_identify = TRUE;
 
    cp->cp_datalen = htonl(56);
    cp->cp_dataDMA = htonl(virt_to_bus(buff));
    cp->cp_statDMA = htonl(virt_to_bus(sp));
    cp->cp_viraddr = cp;
 
    cp->cp_id = id;
    cp->cp_lun = 0;
 
    cp->cp_cdb[0] = INQUIRY;
    cp->cp_cdb[1] = 0;
    cp->cp_cdb[2] = 0;
    cp->cp_cdb[3] = 0;
    cp->cp_cdb[4] = 56;
    cp->cp_cdb[5] = 0;
 
    fake_int_base = (struct eata_register *) base;
    fake_int_result = FALSE;
    fake_int_happened = FALSE;
 
    eata_send_command((u32) cp, (u32) base, EATA_CMD_DMA_SEND_CP);
 
    i = jiffies + (3 * HZ);
    while (fake_int_happened == FALSE && jiffies <= i)
        barrier();
 
    DBG(DBG_INTR3, printk(KERN_DEBUG "fake_int_result: %#x hbastat %#x "
                          "scsistat %#x, buff %p sp %p\n",
                          fake_int_result, (u32) (sp->hba_stat /*& 0x7f*/),
                          (u32) sp->scsi_stat, buff, sp));
 
    scsi_init_free((void *)cp, sizeof(struct eata_ccb));
    scsi_init_free((void *)sp, sizeof(struct eata_sp));
 
    if ((fake_int_result & HA_SERROR) || jiffies > i){
        printk(KERN_WARNING "eata_dma: trying to reset HBA at %x to clear "
               "possible blink state\n", base);
        /* hard reset the HBA  */
        inb((u32) (base) + HA_RSTATUS);
        eata_send_command(0, base, EATA_CMD_RESET);
        DELAY(1);
        return (NULL);
    } else
        return (buff);
}
 
 
int get_conf_PIO(u32 base, struct get_conf *buf)
{
    ulong loop = R_LIMIT;
    u16 *p;
 
    if(check_region(base, 9))
        return (FALSE);
 
    memset(buf, 0, sizeof(struct get_conf));
 
    while (inb(base + HA_RSTATUS) & HA_SBUSY)
        if (--loop == 0)
            return (FALSE);
 
    fake_int_base = (struct eata_register *) base;
    fake_int_result = FALSE;
    fake_int_happened = FALSE;
 
    DBG(DBG_PIO && DBG_PROBE,
        printk("Issuing PIO READ CONFIG to HBA at %#x\n", base));
    eata_send_command(0, base, EATA_CMD_PIO_READ_CONFIG);
 
    loop = R_LIMIT;
    for (p = (u16 *) buf;
         (long)p <= ((long)buf + (sizeof(struct get_conf) / 2)); p++) {
        while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
            if (--loop == 0)
                return (FALSE);
 
        loop = R_LIMIT;
        *p = inw(base + HA_RDATA);
    }
 
    if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {            /* Error ? */
        if (htonl(EATA_SIGNATURE) == buf->signature) {
            DBG(DBG_PIO&&DBG_PROBE, printk("EATA Controller found at %x "
                                           "EATA Level: %x\n", (uint) base,
                                           (uint) (buf->version)));
 
            while (inb(base + HA_RSTATUS) & HA_SDRQ)
                inw(base + HA_RDATA);
            return (TRUE);
        }
    } else {
        DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during transfer "
                  "for HBA at %lx\n", (long)base));
    }
    return (FALSE);
}
 
 
void print_config(struct get_conf *gc)
{
    printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d DMAS:%d\n",
           (u32) ntohl(gc->len), gc->version,
           gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support,
           gc->DMA_support);
    printk("DMAV:%d HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n",
           gc->DMA_valid, gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2],
           gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
    printk("IRQ:%d IRQT:%d DMAC:%d FORCADR:%d SG_64K:%d SG_UAE:%d MID:%d "
           "MCH:%d MLUN:%d\n",
           gc->IRQ, gc->IRQ_TR, (8 - gc->DMA_channel) & 7, gc->FORCADR,
           gc->SG_64K, gc->SG_UAE, gc->MAX_ID, gc->MAX_CHAN, gc->MAX_LUN);
    printk("RIDQ:%d PCI:%d EISA:%d\n",
           gc->ID_qest, gc->is_PCI, gc->is_EISA);
    DBG(DPT_DEBUG, DELAY(14));
}
 
short register_HBA(u32 base, struct get_conf *gc, Scsi_Host_Template * tpnt,
                   u8 bustype)
{
    ulong size = 0;
    unchar dma_channel = 0;
    char *buff = 0;
    unchar bugs = 0;
    struct Scsi_Host *sh;
    hostdata *hd;
    int x;
 
 
    DBG(DBG_REGISTER, print_config(gc));
 
    if (gc->DMA_support == FALSE) {
        printk("The EATA HBA at %#.4x does not support DMA.\n"
               "Please use the EATA-PIO driver.\n", base);
        return (FALSE);
    }
    if(gc->HAA_valid == FALSE || ntohl(gc->len) < 0x22)
        gc->MAX_CHAN = 0;
 
    if (reg_IRQ[gc->IRQ] == FALSE) {    /* Interrupt already registered ? */
        if (!request_irq(gc->IRQ, (void *) eata_fake_int_handler, SA_INTERRUPT,
                         "eata_dma", NULL)){
            reg_IRQ[gc->IRQ]++;
            if (!gc->IRQ_TR)
                reg_IRQL[gc->IRQ] = TRUE;   /* IRQ is edge triggered */
        } else {
            printk("Couldn't allocate IRQ %d, Sorry.", gc->IRQ);
            return (FALSE);
        }
    } else {            /* More than one HBA on this IRQ */
        if (reg_IRQL[gc->IRQ] == TRUE) {
            printk("Can't support more than one HBA on this IRQ,\n"
                   "  if the IRQ is edge triggered. Sorry.\n");
            return (FALSE);
        } else
            reg_IRQ[gc->IRQ]++;
    }
 
 
    /* If DMA is supported but DMA_valid isn't set to indicate that
     * the channel number is given we must have pre 2.0 firmware (1.7?)
     * which leaves us to guess since the "newer ones" also don't set the
     * DMA_valid bit.
     */
    if (gc->DMA_support && !gc->DMA_valid && gc->DMA_channel) {
      printk(KERN_WARNING "eata_dma: If you are using a pre 2.0 firmware "
             "please update it !\n"
             "          You can get new firmware releases from ftp.dpt.com\n");
        gc->DMA_channel = (base == 0x1f0 ? 3 /* DMA=5 */ : 2 /* DMA=6 */);
        gc->DMA_valid = TRUE;
    }
 
    /* if gc->DMA_valid it must be an ISA HBA and we have to register it */
    dma_channel = BUSMASTER;
    if (gc->DMA_valid) {
        if (request_dma(dma_channel = (8 - gc->DMA_channel) & 7, "eata_dma")) {
            printk(KERN_WARNING "Unable to allocate DMA channel %d for ISA HBA"
                   " at %#.4x.\n", dma_channel, base);
            reg_IRQ[gc->IRQ]--;
            if (reg_IRQ[gc->IRQ] == 0)
                free_irq(gc->IRQ, NULL);
            if (gc->IRQ_TR == FALSE)
                reg_IRQL[gc->IRQ] = FALSE;
            return (FALSE);
        }
    }
 
    if (dma_channel != BUSMASTER) {
        disable_dma(dma_channel);
        clear_dma_ff(dma_channel);
        set_dma_mode(dma_channel, DMA_MODE_CASCADE);
        enable_dma(dma_channel);
    }
 
    if (bustype != IS_EISA && bustype != IS_ISA)
        buff = get_board_data(base, gc->IRQ, gc->scsi_id[3]);
 
    if (buff == NULL) {
        if (bustype == IS_EISA || bustype == IS_ISA) {
            bugs = bugs || BROKEN_INQUIRY;
        } else {
            if (gc->DMA_support == FALSE)
                printk(KERN_WARNING "HBA at %#.4x doesn't support DMA. "
                       "Sorry\n", base);
            else
                printk(KERN_WARNING "HBA at %#.4x does not react on INQUIRY. "
                       "Sorry.\n", base);
            if (gc->DMA_valid)
                free_dma(dma_channel);
            reg_IRQ[gc->IRQ]--;
            if (reg_IRQ[gc->IRQ] == 0)
                free_irq(gc->IRQ, NULL);
            if (gc->IRQ_TR == FALSE)
                reg_IRQL[gc->IRQ] = FALSE;
            return (FALSE);
        }
    }
 
    if (gc->DMA_support == FALSE && buff != NULL)
        printk(KERN_WARNING "HBA %.12sat %#.4x doesn't set the DMA_support "
               "flag correctly.\n", &buff[16], base);
 
    request_region(base, 9, "eata_dma"); /* We already checked the
                                          * availability, so this
                                          * should not fail.
                                          */
 
    if(ntohs(gc->queuesiz) == 0) {
        gc->queuesiz = ntohs(64);
        printk(KERN_WARNING "Warning: Queue size has to be corrected. Assuming"
               " 64 queueslots\n"
               "         This might be a PM2012B with a defective Firmware\n"
               "         Contact DPT support@dpt.com for an upgrade\n");
    }
 
    size = sizeof(hostdata) + ((sizeof(struct eata_ccb) + sizeof(long))
                               * ntohs(gc->queuesiz));
 
    DBG(DBG_REGISTER, printk("scsi_register size: %ld\n", size));
 
    sh = scsi_register(tpnt, size);
 
    if(sh != NULL) {
 
        hd = SD(sh);
 
        memset(hd->reads, 0, sizeof(u32) * 26);
 
        sh->select_queue_depths = eata_select_queue_depths;
 
        hd->bustype = bustype;
 
        /*
         * If we are using a ISA board, we can't use extended SG,
         * because we would need excessive amounts of memory for
         * bounce buffers.
         */
        if (gc->SG_64K==TRUE && ntohs(gc->SGsiz)==64 && hd->bustype!=IS_ISA){
            sh->sg_tablesize = SG_SIZE_BIG;
        } else {
            sh->sg_tablesize = ntohs(gc->SGsiz);
            if (sh->sg_tablesize > SG_SIZE || sh->sg_tablesize == 0) {
                if (sh->sg_tablesize == 0)
                    printk(KERN_WARNING "Warning: SG size had to be fixed.\n"
                           "This might be a PM2012 with a defective Firmware"
                           "\nContact DPT support@dpt.com for an upgrade\n");
                sh->sg_tablesize = SG_SIZE;
            }
        }
        hd->sgsize = sh->sg_tablesize;
    }
 
    if(sh != NULL) {
        sh->can_queue = hd->queuesize = ntohs(gc->queuesiz);
        sh->cmd_per_lun = 0;
    }
 
    if(sh == NULL) {
        DBG(DBG_REGISTER, printk(KERN_NOTICE "eata_dma: couldn't register HBA"
                                 " at%x \n", base));
        scsi_unregister(sh);
        if (gc->DMA_valid)
            free_dma(dma_channel);
 
        reg_IRQ[gc->IRQ]--;
        if (reg_IRQ[gc->IRQ] == 0)
            free_irq(gc->IRQ, NULL);
        if (gc->IRQ_TR == FALSE)
            reg_IRQL[gc->IRQ] = FALSE;
        return (FALSE);
    }
 
 
    hd->broken_INQUIRY = (bugs & BROKEN_INQUIRY);
 
    if(hd->broken_INQUIRY == TRUE) {
        strcpy(hd->vendor, "DPT");
        strcpy(hd->name, "??????????");
        strcpy(hd->revision, "???.?");
        hd->firmware_revision = 0;
    } else {
        strncpy(hd->vendor, &buff[8], 8);
        hd->vendor[8] = 0;
        strncpy(hd->name, &buff[16], 17);
        hd->name[17] = 0;
        hd->revision[0] = buff[32];
        hd->revision[1] = buff[33];
        hd->revision[2] = buff[34];
        hd->revision[3] = '.';
        hd->revision[4] = buff[35];
        hd->revision[5] = 0;
        hd->firmware_revision = (buff[32] << 24) + (buff[33] << 16)
                                    + (buff[34] << 8) + buff[35];
    }
 
    if (hd->firmware_revision >= (('0'<<24) + ('7'<<16) + ('G'<< 8) + '0'))
        hd->immediate_support = 1;
    else
        hd->immediate_support = 0;
 
    switch (ntohl(gc->len)) {
    case 0x1c:
        hd->EATA_revision = 'a';
        break;
    case 0x1e:
        hd->EATA_revision = 'b';
        break;
    case 0x22:
        hd->EATA_revision = 'c';
        break;
    case 0x24:
        hd->EATA_revision = 'z';
    default:
        hd->EATA_revision = '?';
    }
 
 
    if(ntohl(gc->len) >= 0x22) {
        sh->max_id = gc->MAX_ID + 1;
        sh->max_lun = gc->MAX_LUN + 1;
    } else {
        sh->max_id = 8;
        sh->max_lun = 8;
    }
 
    hd->HBA_number = sh->host_no;
    hd->channel = gc->MAX_CHAN;
    sh->max_channel = gc->MAX_CHAN;
    sh->unique_id = base;
    sh->base = (char *) base;
    sh->io_port = base;
    sh->n_io_port = 9;
    sh->irq = gc->IRQ;
    sh->dma_channel = dma_channel;
 
    /* FIXME:
     * SCSI midlevel code should support different HBA ids on every channel
     */
    sh->this_id = gc->scsi_id[3];
 
    if (gc->SECOND)
        hd->primary = FALSE;
    else
        hd->primary = TRUE;
 
    sh->wish_block = FALSE;
 
    if (hd->bustype != IS_ISA) {
        sh->unchecked_isa_dma = FALSE;
    } else {
        sh->unchecked_isa_dma = TRUE;   /* We're doing ISA DMA */
    }
 
    for(x = 0; x <= 11; x++){             /* Initialize min. latency */
        hd->writes_lat[x][1] = 0xffffffff;
        hd->reads_lat[x][1] = 0xffffffff;
    }
    hd->all_lat[1] = 0xffffffff;
 
    hd->next = NULL;    /* build a linked list of all HBAs */
    hd->prev = last_HBA;
    if(hd->prev != NULL)
        SD(hd->prev)->next = sh;
    last_HBA = sh;
    if (first_HBA == NULL)
        first_HBA = sh;
    registered_HBAs++;
 
    return (TRUE);
}
 
 
 
void find_EISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
{
    u32 base;
    int i;
 
#if CHECKPAL
    u8 pal1, pal2, pal3;
#endif
 
    for (i = 0; i < MAXEISA; i++) {
        if (EISAbases[i] == TRUE) { /* Still a possibility ?          */
 
            base = 0x1c88 + (i * 0x1000);
#if CHECKPAL
            pal1 = inb((u16)base - 8);
            pal2 = inb((u16)base - 7);
            pal3 = inb((u16)base - 6);
 
            if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
                ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) && (pal3 == NEC_ID3))||
                ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) && (pal3 == ATT_ID3))){
                DBG(DBG_PROBE, printk("EISA EATA id tags found: %x %x %x \n",
                                      (int)pal1, (int)pal2, (int)pal3));
#endif
                if (get_conf_PIO(base, buf) == TRUE) {
                    if (buf->IRQ) {
                        DBG(DBG_EISA, printk("Registering EISA HBA\n"));
                        register_HBA(base, buf, tpnt, IS_EISA);
                    } else
                        printk("eata_dma: No valid IRQ. HBA removed from list\n");
                }
#if CHECK_BLINK
                else {
                    if (check_blink_state(base))
                        printk("HBA is in BLINK state. Consult your HBAs "
                               "Manual to correct this.\n");
                }
#endif
                /* Nothing found here so we take it from the list */
                EISAbases[i] = 0;
#if CHECKPAL
            }
#endif
        }
    }
    return;
}
 
void find_ISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
{
    int i;
 
    for (i = 0; i < MAXISA; i++) {
        if (ISAbases[i]) {
            if (get_conf_PIO(ISAbases[i],buf) == TRUE){
                DBG(DBG_ISA, printk("Registering ISA HBA\n"));
                register_HBA(ISAbases[i], buf, tpnt, IS_ISA);
            }
#if CHECK_BLINK
            else {
                if (check_blink_state(ISAbases[i]))
                    printk("HBA is in BLINK state. Consult your HBAs "
                           "Manual to correct this.\n");
            }
#endif
            ISAbases[i] = 0;
        }
    }
    return;
}
 
void find_PCI(struct get_conf *buf, Scsi_Host_Template * tpnt)
{
 
#ifndef CONFIG_PCI
    printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
#else
 
    u8 pci_bus, pci_device_fn;
    static s16 pci_index = 0;    /* Device index to PCI BIOS calls */
    u32 base = 0;
    u16 com_adr;
    u16 rev_device;
    u32 error, i, x;
    u8 pal1, pal2, pal3;
 
    if (pcibios_present()) {
        for (i = 0; i <= MAXPCI; ++i, ++pci_index) {
            if (pcibios_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT,
                                    pci_index, &pci_bus, &pci_device_fn))
                break;
            DBG(DBG_PROBE && DBG_PCI,
                printk("eata_dma: find_PCI, HBA at bus %d, device %d,"
                       " function %d, index %d\n", (s32)pci_bus,
                       (s32)((pci_device_fn & 0xf8) >> 3),
                       (s32)(pci_device_fn & 7), pci_index));
 
            if (!(error = pcibios_read_config_word(pci_bus, pci_device_fn,
                                       PCI_CLASS_DEVICE, &rev_device))) {
                if (rev_device == PCI_CLASS_STORAGE_SCSI) {
                    if (!(error = pcibios_read_config_word(pci_bus,
                                               pci_device_fn, PCI_COMMAND,
                                               (u16 *) & com_adr))) {
                        if (!((com_adr & PCI_COMMAND_IO) &&
                              (com_adr & PCI_COMMAND_MASTER))) {
                            printk("eata_dma: find_PCI, HBA has IO or"
                                   " BUSMASTER mode disabled\n");
                            continue;
                        }
                    } else
                        printk("eata_dma: find_PCI, error %x while reading "
                               "PCI_COMMAND\n", error);
                } else
                    printk("eata_dma: find_PCI, DEVICECLASSID %x didn't match\n",
                           rev_device);
            } else {
                printk("eata_dma: find_PCI, error %x while reading "
                       "PCI_CLASS_BASE\n",
                       error);
                continue;
            }
 
            if (!(error = pcibios_read_config_dword(pci_bus, pci_device_fn,
                                       PCI_BASE_ADDRESS_0, (int *) &base))){
 
                /* Check if the address is valid */
                if (base & 0x01) {
                    base &= 0xfffffffe;
                    /* EISA tag there ? */
                    pal1 = inb(base);
                    pal2 = inb(base + 1);
                    pal3 = inb(base + 2);
                    if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
                        ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) &&
                         (pal3 == NEC_ID3)) ||
                        ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) &&
                         (pal3 == ATT_ID3)))
                        base += 0x08;
                    else
                        base += 0x10;   /* Now, THIS is the real address */
 
                    if (base != 0x1f8) {
                        /* We didn't find it in the primary search */
                        if (get_conf_PIO(base, buf) == TRUE) {
 
                            /* OK. We made it till here, so we can go now
                             * and register it. We  only have to check and
                             * eventually remove it from the EISA and ISA list
                             */
                            DBG(DBG_PCI, printk("Registering PCI HBA\n"));
                            register_HBA(base, buf, tpnt, IS_PCI);
 
                            if (base < 0x1000) {
                                for (x = 0; x < MAXISA; ++x) {
                                    if (ISAbases[x] == base) {
                                        ISAbases[x] = 0;
                                        break;
                                    }
                                }
                            } else if ((base & 0x0fff) == 0x0c88)
                                EISAbases[(base >> 12) & 0x0f] = 0;
                            continue;  /* break; */
                        }
#if CHECK_BLINK
                        else if (check_blink_state(base) == TRUE) {
                            printk("eata_dma: HBA is in BLINK state.\n"
                                   "Consult your HBAs manual to correct this.\n");
                        }
#endif
                    }
                }
            } else {
                printk("eata_dma: error %x while reading "
                       "PCI_BASE_ADDRESS_0\n", error);
            }
        }
    } else {
        printk("eata_dma: No BIOS32 extensions present. This driver release "
               "still depends on it.\n"
               "          Skipping scan for PCI HBAs. \n");
    }
#endif /* #ifndef CONFIG_PCI */
    return;
}
 
int eata_detect(Scsi_Host_Template * tpnt)
{
    struct Scsi_Host *HBA_ptr;
    struct get_conf gc;
    int i;
 
    DBG((DBG_PROBE && DBG_DELAY) || DPT_DEBUG,
        printk("Using lots of delays to let you read the debugging output\n"));
 
    tpnt->proc_dir = &proc_scsi_eata_dma;
 
    status = scsi_init_malloc(512, GFP_ATOMIC | GFP_DMA);
    dma_scratch = scsi_init_malloc(1024, GFP_ATOMIC | GFP_DMA);
 
    if(status == NULL || dma_scratch == NULL) {
        printk("eata_dma: can't allocate enough memory to probe for hosts !\n");
        return(0);
    }
 
    dma_scratch += 4;
 
    find_PCI(&gc, tpnt);
 
    find_EISA(&gc, tpnt);
 
    find_ISA(&gc, tpnt);
 
    for (i = 0; i <= MAXIRQ; i++) { /* Now that we know what we have, we     */
        if (reg_IRQ[i] >= 1){       /* exchange the interrupt handler which  */
            free_irq(i, NULL);      /* we used for probing with the real one */
            request_irq(i, (void *)(eata_int_handler), SA_INTERRUPT|SA_SHIRQ,
                        "eata_dma", NULL);
        }
    }
 
    HBA_ptr = first_HBA;
 
    if (registered_HBAs != 0) {
        printk("EATA (Extended Attachment) driver version: %d.%d%s"
               "\ndeveloped in co-operation with DPT\n"
               "(c) 1993-96 Michael Neuffer, mike@i-Connect.Net\n",
               VER_MAJOR, VER_MINOR, VER_SUB);
        printk("Registered HBAs:");
        printk("\nHBA no. Boardtype    Revis  EATA Bus  BaseIO IRQ"
               " DMA Ch ID Pr QS  S/G IS\n");
        for (i = 1; i <= registered_HBAs; i++) {
            printk("scsi%-2d: %.12s v%s 2.0%c %s %#.4x  %2d",
                   HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
                   SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P')?
                   "PCI ":(SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ",
                   (u32) HBA_ptr->base, HBA_ptr->irq);
            if(HBA_ptr->dma_channel != BUSMASTER)
                printk("  %2x ", HBA_ptr->dma_channel);
            else
                printk(" %s", "BMST");
            printk(" %d  %d  %c %3d %3d %c\n",
                   SD(HBA_ptr)->channel+1, HBA_ptr->this_id,
                   (SD(HBA_ptr)->primary == TRUE)?'Y':'N',
                   HBA_ptr->can_queue, HBA_ptr->sg_tablesize,
                   (SD(HBA_ptr)->immediate_support == TRUE)?'Y':'N');
            HBA_ptr = SD(HBA_ptr)->next;
        }
    } else {
        scsi_init_free((void *)status, 512);
    }
 
    scsi_init_free((void *)dma_scratch - 4, 1024);
 
    DBG(DPT_DEBUG, DELAY(12));
 
    return(registered_HBAs);
}
 
#ifdef MODULE
/* Eventually this will go into an include file, but this will be later */
Scsi_Host_Template driver_template = EATA_DMA;
#include "scsi_module.c"
#endif
 
/*
 * Overrides for Emacs so that we almost follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-indent-level: 4
 * c-brace-imaginary-offset: 0
 * c-brace-offset: -4
 * c-argdecl-indent: 4
 * c-label-offset: -4
 * c-continued-statement-offset: 4
 * c-continued-brace-offset: 0
 * tab-width: 8
 * End:
 */
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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [eata_dma.c] - Blame information for rev 1626

Line No.	Rev	Author	Line
1	1626	jcastillo	`/************************************************************`
2			`* *`
3			`* Linux EATA SCSI driver *`
4			`* *`
5			`* based on the CAM document CAM/89-004 rev. 2.0c, *`
6			`* DPT's driver kit, some internal documents and source, *`
7			`* and several other Linux scsi drivers and kernel docs. *`
8			`* *`
9			`* The driver currently: *`
10			`* -supports all ISA based EATA-DMA boards *`
11			`* like PM2011, PM2021, PM2041, PM3021 *`
12			`* -supports all EISA based EATA-DMA boards *`
13			`* like PM2012B, PM2022, PM2122, PM2322, PM2042, *`
14			`* PM3122, PM3222, PM3332 *`
15			`* -supports all PCI based EATA-DMA boards *`
16			`* like PM2024, PM2124, PM2044, PM2144, PM3224, *`
17			`* PM3334 *`
18			`* -supports the Wide, Ultra Wide and Differential *`
19			`* versions of the boards *`
20			`* -supports multiple HBAs with & without IRQ sharing *`
21			`* -supports all SCSI channels on multi channel boards *`
22			`* -supports ix86 and MIPS, untested on ALPHA *`
23			`* -needs identical IDs on all channels of a HBA *`
24			`* -can be loaded as module *`
25			`* -displays statistical and hardware information *`
26			`* in /proc/scsi/eata_dma *`
27			`* -provides rudimentary latency measurement *`
28			`* possibilities via /proc/scsi/eata_dma/<hostnum> *`
29			`* *`
30			`* (c)1993-96 Michael Neuffer *`
31			`* mike@i-Connect.Net *`
32			`* neuffer@mail.uni-mainz.de *`
33			`* *`
34			`* This program is free software; you can redistribute it *`
35			`* and/or modify it under the terms of the GNU General *`
36			`* Public License as published by the Free Software *`
37			`* Foundation; either version 2 of the License, or *`
38			`* (at your option) any later version. *`
39			`* *`
40			`* This program is distributed in the hope that it will be *`