Import of Linus's Linux 1.1.68

1 files changed, 864 insertions, 0 deletions

diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c
new file mode 100644
index 000000000..b6976e1bc
--- /dev/null
+++ b/drivers/scsi/eata.c
@@ -0,0 +1,864 @@
+/*
+ *      eata.c - Low-level SCSI driver for EISA EATA SCSI controllers.
+ *
+ *      18 Nov 1994 rev. 1.08 for linux 1.1.64
+ *                  Forces sg_tablesize = 64 and can_queue = 64 if these
+ *                  values are not correctly detected (DPT PM2012).
+ *
+ *      14 Nov 1994 rev. 1.07 for linux 1.1.63  Final BETA release.
+ *      04 Aug 1994 rev. 1.00 for linux 1.1.39  First BETA release.
+ *
+ *
+ *          This driver is based on the CAM (Common Access Method Committee)
+ *          EATA (Enhanced AT Bus Attachment) rev. 2.0A.
+ *
+ *      Released by Dario Ballabio (Dario_Ballabio@milano.europe.dg.com)
+ *
+ */
+
+/*
+ *
+ *  This code has been tested with up to 3 Distributed Processing Technology 
+ *  PM2122A/9X (DPT SCSI BIOS v002.D1, firmware v05E.0) eisa controllers,
+ *  no on board cache and no RAID option. 
+ *  BIOS must be enabled on the first board and must be disabled for all other 
+ *  boards. 
+ *  Support is provided for any number of DPT PM2122 eisa boards.
+ *  All boards should be configured at the same IRQ level.
+ *  Multiple IRQ configurations are supported too.
+ *  Boards can be located in any eisa slot (1-15) and are named EATA0, 
+ *  EATA1,... in increasing eisa slot number.
+ *  In order to detect the boards, the IRQ must be _level_ triggered 
+ *  (not _edge_ triggered).
+ *
+ *  Other eisa configuration parameters are:
+ *
+ *  COMMAND QUEUING   : ENABLED
+ *  COMMAND TIMEOUT   : ENABLED
+ *  CACHE             : DISABLED
+ *
+ */
+
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include "../block/blk.h"
+#include "scsi.h"
+#include "hosts.h"
+#include "sd.h"
+#include <asm/irq.h>
+#include "linux/in.h"
+#include "eata.h"
+
+#define NO_DEBUG_DETECT
+#define NO_DEBUG_INTERRUPT
+#define NO_DEBUG_STATISTICS
+
+#define MAX_TARGET 8
+#define MAX_IRQ 16
+#define MAX_BOARDS 15
+#define MAX_MAILBOXES 64
+#define MAX_SGLIST 64
+#define MAX_CMD_PER_LUN 2
+
+#define FALSE 0
+#define TRUE 1
+#define FREE 0
+#define IN_USE   1
+#define LOCKED   2
+#define IN_RESET 3
+#define NO_IRQ  0xff
+#define MAXLOOP 20000
+
+#define REG_CMD         7
+#define REG_STATUS      7
+#define REG_AUX_STATUS  8
+#define REG_DATA        0
+#define REG_DATA2       1
+#define REG_SEE         6
+#define REG_LOW         2
+#define REG_LM          3
+#define REG_MID         4
+#define REG_MSB         5
+#define BSY_ASSERTED      0x80
+#define DRQ_ASSERTED      0x08
+#define ABSY_ASSERTED     0x01
+#define IRQ_ASSERTED      0x02
+#define READ_CONFIG_PIO   0xF0
+#define SET_CONFIG_PIO    0xF1
+#define SEND_CP_PIO       0xF2
+#define RECEIVE_SP_PIO    0xF3
+#define TRUNCATE_XFR_PIO  0xF4
+#define RESET_PIO         0xF9
+#define READ_CONFIG_DMA   0xFD
+#define SET_CONFIG_DMA    0xFE
+#define SEND_CP_DMA       0xFF
+#define ASOK              0x00
+#define ASST              0x01
+
+/* "EATA", in Big Endian format */
+#define EATA_SIGNATURE 0x41544145
+
+/* Board info structure */
+struct eata_info {
+   ulong  data_len;     /* Number of valid bytes after this field (30) */
+   ulong  sign;         /* ASCII "EATA" signature */
+   unchar        :4,    /* unused low nibble */
+          version:4;    /* EATA version */
+   unchar  ocsena:1,    /* Overlap Command Support Enabled */
+           tarsup:1,    /* Target Mode Supported */
+                 :2,
+           dmasup:1,    /* DMA Supported */
+           drqvld:1,    /* DRQ Index (DRQX) is valid */
+              ata:1,    /* This is an ATA device */
+           haaval:1;    /* Host Adapter Address Valid */
+   ushort cp_pad_len;   /* Number of pad bytes after cp_len */
+   ulong  host_addr;    /* Host Adapter SCSI ID */
+   ulong  cp_len;       /* Number of valid bytes in cp */
+   ulong  sp_len;       /* Number of valid bytes in sp */
+   ushort queue_size;   /* Max number of cp that can be queued */
+   ushort unused;
+   ushort scatt_size;   /* Max number of entries in scatter/gather table */
+   unchar     irq:4,    /* Interrupt Request assigned to this controller */
+           irq_tr:1,    /* 0 for edge triggered, 1 for level triggered */
+           second:1,    /* 1 if this is a secondary (not primary) controller */
+             drqx:2;    /* DRQ Index (0=DRQ0, 1=DRQ7, 2=DRQ6, 3=DRQ5) */
+   unchar  sync;        /* 1 if scsi target id 7...0 is running sync scsi */
+   ushort ipad[250];
+   };
+
+/* Board config structure */
+struct eata_config {
+   ushort len;          /* Number of bytes following this field */
+   unchar edis:1,       /* Disable EATA interface after config command */
+         ocena:1,       /* Overlapped Commands Enabled */
+        mdpena:1,       /* Transfer all Modified Data Pointer Messages */
+        tarena:1,       /* Target Mode Enabled for this controller */
+              :4;
+   unchar cpad[511];
+   };
+
+/* Returned status packet structure */
+struct mssp {
+   unchar adapter_status:7,    /* State related to current command */
+                     eoc:1;    /* End Of Command (1 = command completed) */
+   unchar target_status;       /* SCSI status received after data transfer */
+   unchar unused[2];
+   ulong inv_res_len;          /* Number of bytes not transferred */
+   Scsi_Cmnd *SCpnt;           /* Address set in cp */
+   char mess[12];
+   };
+
+/* Command packet structure */
+struct mscp {
+   unchar  sreset:1,     /* SCSI Bus Reset Signal should be asserted */
+           interp:1,     /* The controller interprets cp, not the target */ 
+           reqsen:1,     /* Transfer Request Sense Data to addr using DMA */
+               sg:1,     /* Use Scatter/Gather */
+                 :1,
+             init:1,     /* Re-initialize controller and self test */
+             dout:1,     /* Direction of Transfer is Out (Host to Target) */
+              din:1;     /* Direction of Transfer is In (Target to Host) */
+   unchar sense_len;     /* Request Sense Length */
+   unchar unused[4];
+   unchar phsunit:1,     /* Send to Target Physical Unit (bypass RAID) */
+          notused:7;
+   unchar target;        /* SCSI Target ID */
+   unchar     lun:3,     /* LUN */
+                 :2,
+           luntar:1,     /* This cp is for Target (not LUN) */
+           dispri:1,     /* Disconnect Privilege granted */
+              one:1;     /* 1 */
+   unchar mess[3];       /* Massage to/from Target */
+   unchar cdb[12];       /* Command Descriptor Block */
+   ulong  data_len;      /* If sg=0 Data Length, if sg=1 sglist length */
+   Scsi_Cmnd *SCpnt;     /* Address to be returned is sp */
+   ulong  data_address;  /* If sg=0 Data Address, if sg=1 sglist address */
+   ulong  sp_addr;       /* Address where sp is DMA'ed when cp completes */
+   ulong  sense_addr;    /* Address where Sense Data is DMA'ed on error */
+
+   struct sg_list {
+      unsigned int address;     /* Segment Address */
+      unsigned int num_bytes;   /* Segment Length */
+      } sglist[MAX_SGLIST];
+
+   unsigned int index;   /* cp index */
+   };
+
+struct hostdata {
+   struct mscp cp[MAX_MAILBOXES];       /* Mailboxes for this board */
+   unsigned int cp_stat[MAX_MAILBOXES]; /* FREE, IN_USE, LOCKED, IN_RESET */
+   unsigned int last_cp_used;           /* Index of last mailbox used */
+   unsigned int iocount;                /* Total i/o done for this board */
+   unsigned int multicount;             /* Total ... in second ihdlr loop */
+   int board_number;                    /* Number of this board */
+   char board_name[16];                 /* Name of this board */
+   int in_reset;                        /* True if board is doing a reset */
+   int target_time_out[MAX_TARGET];     /* N. of timeout errors on target */
+   int target_reset[MAX_TARGET];        /* If TRUE redo operation on target */
+   struct mssp sp[MAX_MAILBOXES];       /* Returned status for this board */
+   };
+
+static struct Scsi_Host * sh[MAX_BOARDS + 1];
+static char* driver_name = "EATA";
+static unsigned int irqlist[MAX_IRQ], calls[MAX_IRQ];
+
+#define HD(board) ((struct hostdata *) &sh[board]->hostdata)
+#define BN(board) (HD(board)->board_name)
+
+static void eata_interrupt_handler(int);
+static int do_trace = FALSE;
+
+static inline unchar wait_on_busy(ushort iobase) {
+   unsigned int loop = MAXLOOP;
+
+   while (inb(iobase + REG_AUX_STATUS) & ABSY_ASSERTED)
+      if (--loop == 0) return TRUE;
+
+   return FALSE;
+}
+
+static inline unchar do_dma (ushort iobase, unsigned int addr, unchar cmd) {
+
+   if (wait_on_busy(iobase)) return TRUE;
+
+   if (addr) {
+      outb((char)  addr,        iobase + REG_LOW);
+      outb((char) (addr >> 8),  iobase + REG_LM);
+      outb((char) (addr >> 16), iobase + REG_MID);
+      outb((char) (addr >> 24), iobase + REG_MSB);
+      }
+
+   outb(cmd, iobase + REG_CMD);
+   return FALSE;
+}
+
+static inline unchar read_pio (ushort iobase, ushort *start, ushort *end) {
+   unsigned int loop = MAXLOOP;
+   ushort *p;
+
+   for (p = start; p <= end; p++) {
+
+      while (!(inb(iobase + REG_STATUS) & DRQ_ASSERTED)) 
+         if (--loop == 0) return TRUE;
+
+      loop = MAXLOOP;
+      *p = inw(iobase);
+      }
+
+   return FALSE;
+}
+
+static inline int port_detect (ushort *port_base, unsigned int j, 
+                               Scsi_Host_Template * tpnt) {
+   struct eata_info info;
+   struct eata_config config;
+   char name[16];
+
+   sprintf(name, "%s%d", driver_name, j);
+
+   if (do_dma(*port_base, 0, READ_CONFIG_PIO)) return FALSE;
+
+   /* Read the info structure */
+   if (read_pio(*port_base, (ushort *)&info, (ushort *)&info.ipad[0])) 
+      return FALSE;
+
+   /* check the controller "EATA" signature */
+   if (info.sign != EATA_SIGNATURE) return FALSE;
+
+   if (!info.haaval || info.ata || info.drqvld || !info.dmasup) {
+      printk("%s: unusable board found, detaching.\n", name);
+      return FALSE;
+      }
+
+   if (!info.irq_tr) {
+      printk("%s: IRQ must be level triggered, detaching.\n", name);
+      return FALSE;
+      }
+
+   /* EATA board detected, allocate its IRQ if not already done */
+   if ((info.irq >= MAX_IRQ) || ((irqlist[info.irq] == NO_IRQ) && request_irq
+       (info.irq, eata_interrupt_handler, SA_INTERRUPT, driver_name))) {
+      printk("%s: unable to allocate IRQ %u, detaching.\n", name, info.irq);
+      return FALSE;
+      }
+
+   /* Set board configuration */
+   memset((char *)&config, 0, sizeof(struct eata_config));
+   config.len = (ushort) htons((ushort)510);
+   config.ocena = TRUE;
+
+   if (do_dma(*port_base, (unsigned int)&config, SET_CONFIG_DMA)) {
+      printk("%s: busy timeout sending configuration, detaching.\n", name);
+      return FALSE;
+      }
+
+   sh[j] = scsi_register(tpnt, sizeof(struct hostdata));
+   sh[j]->io_port = *port_base;
+   sh[j]->dma_channel = 0;
+   sh[j]->irq = info.irq;
+   sh[j]->sg_tablesize = (ushort) ntohs(info.scatt_size);
+   sh[j]->this_id = (ushort) ntohl(info.host_addr);
+   sh[j]->can_queue = (ushort) ntohs(info.queue_size);
+   sh[j]->hostt->cmd_per_lun = MAX_CMD_PER_LUN;
+   sh[j]->unchecked_isa_dma = FALSE;
+   memset(HD(j), 0, sizeof(struct hostdata));
+   HD(j)->board_number = j;
+   irqlist[info.irq] = j;
+   strcpy(BN(j), name);
+
+   printk("%s: SCSI ID %d, PORT 0x%03x, IRQ %u, SG %d, "\
+          "Mbox %d, CmdLun %d.\n", BN(j), sh[j]->this_id, 
+           sh[j]->io_port, sh[j]->irq, sh[j]->sg_tablesize, 
+           sh[j]->can_queue, sh[j]->hostt->cmd_per_lun);
+
+   /* DPT PM2012 does not allow to detect sg_tablesize correctly */
+   if (sh[j]->sg_tablesize > MAX_SGLIST || sh[j]->sg_tablesize < 2) {
+      printk("%s: detect, forcing to use %d SG lists.\n", BN(j), MAX_SGLIST);
+      sh[j]->sg_tablesize = MAX_SGLIST;
+      }
+
+   /* DPT PM2012 does not allow to detect can_queue correctly */
+   if (sh[j]->can_queue > MAX_MAILBOXES || sh[j]->can_queue  < 2) {
+      printk("%s: detect, forcing to use %d Mbox.\n", BN(j), MAX_MAILBOXES);
+      sh[j]->can_queue = MAX_MAILBOXES;
+      }
+
+#if defined (DEBUG_DETECT)
+   printk("%s: Version 0x%x, SYNC 0x%x, infol %ld, cpl %ld spl %ld.\n", 
+          name, info.version, info.sync, ntohl(info.data_len), 
+          ntohl(info.cp_len), ntohl(info.sp_len));
+#endif
+
+   return TRUE;
+}
+
+int eata_detect (Scsi_Host_Template * tpnt) {
+   unsigned int j = 0, k, flags;
+
+   ushort eisa_io_port[] = { 
+      0x1c88, 0x2c88, 0x3c88, 0x4c88, 0x5c88, 0x6c88, 0x7c88, 0x8c88,
+      0x9c88, 0xac88, 0xbc88, 0xcc88, 0xdc88, 0xec88, 0xfc88, 0x0
+      };
+
+   ushort *port_base = eisa_io_port;
+
+   save_flags(flags);
+   cli();
+
+   for (k = 0; k < MAX_IRQ; k++) {
+      irqlist[k] = NO_IRQ;
+      calls[k] = 0;
+      }
+
+   for (k = 0; k < MAX_BOARDS + 1; k++) sh[k] = NULL;
+
+   while (*port_base) {
+
+      if(j < MAX_BOARDS && port_detect(port_base, j, tpnt)) j++;
+
+      port_base++;
+      }
+
+   restore_flags(flags);
+   return j;
+}
+
+static inline void build_sg_list(struct mscp *cpp, Scsi_Cmnd *SCpnt) {
+   unsigned int k;
+   struct scatterlist * sgpnt;
+
+   sgpnt = (struct scatterlist *) SCpnt->request_buffer;
+
+   for(k = 0; k < SCpnt->use_sg; k++) {
+      cpp->sglist[k].address = htonl((unsigned int) sgpnt[k].address);
+      cpp->sglist[k].num_bytes = htonl((unsigned int) sgpnt[k].length);
+      }
+
+   cpp->data_address = htonl((unsigned int) cpp->sglist);
+   cpp->data_len = htonl((SCpnt->use_sg * sizeof(struct sg_list)));
+}
+
+int eata_queuecommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *)) {
+   unsigned int i, j, k, flags;
+   struct mscp *cpp;
+   struct mssp *spp;
+
+   save_flags(flags);
+   cli();
+   /* j is the board number */
+   j = ((struct hostdata *) SCpnt->host->hostdata)->board_number;
+
+   if (!done) panic("%s: qcomm, pid %ld, null done.\n", BN(j), SCpnt->pid);
+
+   /* i is the mailbox number, look for the first free mailbox 
+      starting from last_cp_used */
+   i = HD(j)->last_cp_used + 1;
+
+   for(k = 0; k < sh[j]->can_queue; k++, i++) {
+
+      if (i >= sh[j]->can_queue) i = 0;
+
+      if (HD(j)->cp_stat[i] == FREE) {
+         HD(j)->last_cp_used = i;
+         break;
+         }
+      }
+
+   if (k == sh[j]->can_queue) {
+      printk("%s: qcomm, no free mailbox, resetting.\n", BN(j));
+
+      if (HD(j)->in_reset) 
+         printk("%s: qcomm, already in reset.\n", BN(j));
+      else if (eata_reset(SCpnt) == SCSI_RESET_SUCCESS) 
+         panic("%s: qcomm, SCSI_RESET_SUCCESS.\n", BN(j));
+
+      SCpnt->result = DID_BUS_BUSY << 16; 
+      SCpnt->host_scribble = NULL;
+      printk("%s: qcomm, pid %ld, DID_BUS_BUSY, done.\n", BN(j), SCpnt->pid);
+      restore_flags(flags);
+      done(SCpnt);    
+      return 0;
+      }
+
+   /* Set pointer to control packet structure */
+   cpp = &HD(j)->cp[i];
+
+   memset(cpp, 0, sizeof(struct mscp));
+
+   /* Set pointer to status packet structure */
+   spp = &HD(j)->sp[i];
+
+   memset(spp, 0, sizeof(struct mssp));
+
+   /* The EATA protocol uses Big Endian format, while Intel is Little Endian */
+   cpp->sp_addr = htonl((unsigned int) spp);
+
+   SCpnt->scsi_done = done;
+   cpp->index = i;
+   SCpnt->host_scribble = (unsigned char *) &cpp->index;
+
+   if (do_trace) printk("%s: qcomm, mbox %d, target %d, pid %ld.\n",
+                        BN(j), i, SCpnt->target, SCpnt->pid);
+
+   if (SCpnt->cmnd[0] == WRITE_10 || SCpnt->cmnd[0] == WRITE_6)
+      cpp->dout = TRUE;
+   else
+      cpp->din = TRUE;
+
+   cpp->reqsen = TRUE;
+   cpp->dispri = TRUE;
+   cpp->one = TRUE;
+   cpp->target = SCpnt->target;
+   cpp->lun = SCpnt->lun;  
+   cpp->SCpnt = SCpnt;
+   cpp->sense_addr = htonl((unsigned int) SCpnt->sense_buffer); 
+   cpp->sense_len = sizeof SCpnt->sense_buffer;
+
+   if (SCpnt->use_sg) {
+      cpp->sg = TRUE;
+      build_sg_list(cpp, SCpnt);
+      }
+   else {
+      cpp->data_address = htonl((unsigned int) SCpnt->request_buffer);
+      cpp->data_len = htonl(SCpnt->request_bufflen);
+      }
+
+   memcpy(cpp->cdb, SCpnt->cmnd, SCpnt->cmd_len);
+
+   /* Send control packet to the board */
+   if (do_dma(sh[j]->io_port, (unsigned int) cpp, SEND_CP_DMA)) {
+      SCpnt->result = DID_ERROR << 16; 
+      SCpnt->host_scribble = NULL;
+      printk("%s: qcomm, target %d, pid %ld, adapter busy, DID_ERROR, done.\n", 
+             BN(j), SCpnt->target, SCpnt->pid);
+      restore_flags(flags);
+      done(SCpnt);    
+      return 0;
+      }
+
+   HD(j)->cp_stat[i] = IN_USE;
+   restore_flags(flags);
+   return 0;
+}
+
+int eata_abort (Scsi_Cmnd *SCarg) {
+   unsigned int i, j, flags;
+
+   save_flags(flags);
+   cli();
+   j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+
+   if (SCarg->host_scribble == NULL) {
+      printk("%s: abort, target %d, pid %ld inactive.\n",
+             BN(j), SCarg->target, SCarg->pid);
+      return SCSI_ABORT_NOT_RUNNING;
+      }
+
+   i = *(unsigned int *)SCarg->host_scribble;
+   printk("%s: abort, mbox %d, target %d, pid %ld.\n", 
+          BN(j), i, SCarg->target, SCarg->pid);
+
+   if (i >= sh[j]->can_queue)
+      panic("%s: abort, invalid SCarg->host_scribble.\n", BN(j));
+
+   if (wait_on_busy(sh[j]->io_port)) {
+      printk("%s: abort, timeout error.\n", BN(j));
+      restore_flags(flags);
+      return SCSI_ABORT_ERROR;
+      }
+
+   if (HD(j)->cp_stat[i] == FREE) {
+      printk("%s: abort, mbox %d is free.\n", BN(j), i);
+      restore_flags(flags);
+      return SCSI_ABORT_NOT_RUNNING;
+      }
+
+   if (HD(j)->cp_stat[i] == IN_USE) {
+      printk("%s: abort, mbox %d is in use.\n", BN(j), i);
+
+      if (SCarg != HD(j)->cp[i].SCpnt)
+         panic("%s: abort, mbox %d, SCarg %p, cp SCpnt %p.\n",
+               BN(j), i, SCarg, HD(j)->cp[i].SCpnt);
+
+      restore_flags(flags);
+      return SCSI_ABORT_SNOOZE;
+      }
+
+   if (HD(j)->cp_stat[i] == IN_RESET) {
+      printk("%s: abort, mbox %d is in reset.\n", BN(j), i);
+      restore_flags(flags);
+      return SCSI_ABORT_ERROR;
+      }
+
+   if (HD(j)->cp_stat[i] == LOCKED) {
+      printk("%s: abort, mbox %d is locked.\n", BN(j), i);
+      restore_flags(flags);
+      return SCSI_ABORT_NOT_RUNNING;
+      }
+   else
+      panic("%s: abort, mbox %d, invalid cp_stat.\n", BN(j), i);
+}
+
+int eata_reset (Scsi_Cmnd *SCarg) {
+   unsigned int i, j, flags, time, k, limit = 0;
+   int arg_done = FALSE;
+   Scsi_Cmnd *SCpnt;
+
+   save_flags(flags);
+   cli();
+   j = ((struct hostdata *) SCarg->host->hostdata)->board_number;
+   printk("%s: reset, enter, target %d, pid %ld.\n", 
+          BN(j), SCarg->target, SCarg->pid);
+
+   if (SCarg->host_scribble == NULL)
+      printk("%s: reset, pid %ld inactive.\n", BN(j), SCarg->pid);
+
+   if (HD(j)->in_reset) {
+      printk("%s: reset, exit, already in reset.\n", BN(j));
+      restore_flags(flags);
+      return SCSI_RESET_ERROR;
+      }
+
+   if (wait_on_busy(sh[j]->io_port)) {
+      printk("%s: reset, exit, timeout error.\n", BN(j));
+      restore_flags(flags);
+      return SCSI_RESET_ERROR;
+      }
+
+   for (k = 0; k < MAX_TARGET; k++) HD(j)->target_reset[k] = TRUE;
+
+   for (i = 0; i < sh[j]->can_queue; i++) {
+
+      if (HD(j)->cp_stat[i] == FREE) continue;
+
+      if (HD(j)->cp_stat[i] == LOCKED) {
+         HD(j)->cp_stat[i] = FREE;
+         printk("%s: reset, locked mbox %d forced free.\n", BN(j), i);
+         continue;
+         }
+
+      SCpnt = HD(j)->cp[i].SCpnt;
+      HD(j)->cp_stat[i] = IN_RESET;
+      printk("%s: reset, mbox %d in reset, pid %ld.\n",
+             BN(j), i, SCpnt->pid);
+
+      if (SCpnt == NULL)
+         panic("%s: reset, mbox %d, SCpnt == NULL.\n", BN(j), i);
+
+      if (SCpnt->host_scribble == NULL)
+         panic("%s: reset, mbox %d, garbled SCpnt.\n", BN(j), i);
+
+      if (*(unsigned int *)SCpnt->host_scribble != i) 
+         panic("%s: reset, mbox %d, index mismatch.\n", BN(j), i);
+
+      if (SCpnt->scsi_done == NULL) 
+         panic("%s: reset, mbox %d, SCpnt->scsi_done == NULL.\n", BN(j), i);
+
+      if (SCpnt == SCarg) arg_done = TRUE;
+      }
+
+   if (do_dma(sh[j]->io_port, 0, RESET_PIO)) {
+      printk("%s: reset, cannot reset, timeout error.\n", BN(j));
+      restore_flags(flags);
+      return SCSI_RESET_ERROR;
+      }
+
+   printk("%s: reset, board reset done, enabling interrupts.\n", BN(j));
+   do_trace = TRUE;
+   HD(j)->in_reset = TRUE;
+   sti();
+   time = jiffies;
+   while (jiffies < (time + 200) && limit++ < 100000000) sti();
+   cli();
+   printk("%s: reset, interrupts disabled, loops %d.\n", BN(j), limit);
+
+   for (i = 0; i < sh[j]->can_queue; i++) {
+
+      /* Skip mailboxes already set free by interrupt */
+      if (HD(j)->cp_stat[i] != IN_RESET) continue;
+
+      SCpnt = HD(j)->cp[i].SCpnt;
+      SCpnt->result = DID_RESET << 16;
+      SCpnt->host_scribble = NULL;
+
+      /* This mailbox is still waiting for its interrupt */
+      HD(j)->cp_stat[i] = LOCKED;
+
+      printk("%s, reset, mbox %d locked, DID_RESET, pid %ld done.\n",
+             BN(j), i, SCpnt->pid);
+      restore_flags(flags);
+      SCpnt->scsi_done(SCpnt);
+      cli();
+      }
+
+   HD(j)->in_reset = FALSE;
+   do_trace = FALSE;
+   restore_flags(flags);
+
+   if (arg_done) {
+      printk("%s: reset, exit, success.\n", BN(j));
+      return SCSI_RESET_SUCCESS;
+      }
+   else {
+      printk("%s: reset, exit, wakeup.\n", BN(j));
+      return SCSI_RESET_PUNT;
+      }
+}
+
+int eata_bios_param (Disk * disk, int dev, int *ip) {
+   int size = disk->capacity;
+
+   if(size < 0x200000) {           /* < 1Gbyte */
+      ip[0]=64;
+      ip[1]=32;
+      }
+   else if (size < 0x400000) {     /* < 2Gbyte */
+      ip[0]=65;
+      ip[1]=63;
+      }
+   else if(size < 0x800000) {      /* < 4Gbyte */
+      ip[0]=128;
+      ip[1]=63;
+      }
+   else {                          /* ok up to 8Gbyte */
+      ip[0]=255;
+      ip[1]=63;
+      }    
+
+   ip[2] = size / (ip[0] * ip[1]);
+   return 0;
+}
+
+static void eata_interrupt_handler(int irq) {
+   Scsi_Cmnd *SCpnt;
+   unsigned int i, j, k, flags, status, loops, total_loops = 0;
+   struct mssp *spp;
+   struct mscp *cpp;
+
+   save_flags(flags);
+   cli();
+
+   if (irqlist[irq] == NO_IRQ) {
+      printk("%s, ihdlr, irq %d, unexpected interrupt.\n", driver_name, irq);
+      restore_flags(flags);
+      return;
+      }
+
+   if (do_trace) printk("%s: ihdlr, enter, irq %d, calls %d.\n", 
+                        driver_name, irq, calls[irq]);
+
+   /* Service all the boards configured on this irq */
+   for (j = 0; sh[j] != NULL; j++) {
+
+      if (sh[j]->irq != irq) continue;
+
+      loops = 0;
+
+      /* Loop until all interrupts for a board are serviced */
+      while (inb(sh[j]->io_port + REG_AUX_STATUS) & IRQ_ASSERTED) {
+         total_loops++;
+         loops++;
+
+         if (do_trace) printk("%s: ihdlr, start service, count %d.\n",
+                              BN(j), HD(j)->iocount);
+   
+         /* Read the status register to clear the interrupt indication */
+         inb(sh[j]->io_port + REG_STATUS);
+   
+         /* Service all mailboxes of this board */
+         for(i = 0; i < sh[j]->can_queue; i++) {
+            spp = &HD(j)->sp[i];
+   
+            /* Check if this mailbox has completed the operation */
+            if (spp->eoc == FALSE) continue;
+   
+            spp->eoc = FALSE;
+   
+            if (HD(j)->cp_stat[i] == LOCKED) {
+               HD(j)->cp_stat[i] = FREE;
+               printk("%s: ihdlr, mbox %d unlocked, count %d.\n",
+                      BN(j), i, HD(j)->iocount);
+               continue;
+               }
+            else if (HD(j)->cp_stat[i] == FREE) {
+               printk("%s: ihdlr, mbox %d is free, count %d.\n", 
+                      BN(j), i, HD(j)->iocount);
+               continue;
+               }
+            else if (HD(j)->cp_stat[i] == IN_RESET)
+               printk("%s: ihdlr, mbox %d is in reset.\n", BN(j), i);
+            else if (HD(j)->cp_stat[i] != IN_USE) 
+               panic("%s: ihdlr, mbox %d, invalid cp_stat.\n", BN(j), i);
+   
+            HD(j)->cp_stat[i] = FREE;
+            cpp = &HD(j)->cp[i];
+            SCpnt = spp->SCpnt;
+   
+            if (SCpnt == NULL)
+               panic("%s: ihdlr, mbox %d, SCpnt == NULL.\n", BN(j), i);
+   
+            if (SCpnt != cpp->SCpnt)
+               panic("%s: ihdlr, mbox %d, sp SCpnt %p, cp SCpnt %p.\n",
+                     BN(j), i, SCpnt, cpp->SCpnt);
+   
+            if (SCpnt->host_scribble == NULL)
+               panic("%s: ihdlr, mbox %d, pid %ld, SCpnt %p garbled.\n",
+                     BN(j), i, SCpnt->pid, SCpnt);
+   
+            if (*(unsigned int *)SCpnt->host_scribble != i) 
+               panic("%s: ihdlr, mbox %d, pid %ld, index mismatch %d,"\
+                     " irq %d.\n", BN(j), i, SCpnt->pid, 
+                     *(unsigned int *)SCpnt->host_scribble, irq);
+   
+            switch (spp->adapter_status) {
+               case ASOK:          /* status OK */
+   
+                  /* Fix a "READ CAPACITY failed" error on some disk drives */
+                  if (spp->target_status == INTERMEDIATE_GOOD
+                                        && SCpnt->device->type != TYPE_TAPE) 
+                     status = DID_ERROR << 16;
+   
+                  /* If there was a bus reset, redo operation on each target */
+                  else if (spp->target_status == CONDITION_GOOD
+                                        && SCpnt->device->type != TYPE_TAPE
+                                        && HD(j)->target_reset[SCpnt->target])
+                     status = DID_BUS_BUSY << 16;
+                  else
+                     status = DID_OK << 16;
+   
+                  if (spp->target_status == 0)
+                     HD(j)->target_reset[SCpnt->target] = FALSE;
+   
+                  HD(j)->target_time_out[SCpnt->target] = 0;
+   
+                  break;
+               case ASST:          /* Selection Time Out */
+               case 0x02:          /* Command Time Out   */
+   
+                  if (HD(j)->target_time_out[SCpnt->target] > 1)
+                     status = DID_ERROR << 16;
+                  else {
+                     status = DID_TIME_OUT << 16;
+                     HD(j)->target_time_out[SCpnt->target]++;
+                     }
+   
+                  break;
+               case 0x03:          /* SCSI Bus Reset Received */
+   
+                  if (SCpnt->device->type != TYPE_TAPE)
+                     status = DID_BUS_BUSY << 16;
+                  else
+                     status = DID_ERROR << 16;
+   
+                  for (k = 0; k < MAX_TARGET; k++) 
+                     HD(j)->target_reset[k] = TRUE;
+   
+                  break;
+               case 0x07:          /* Bus Parity Error */
+               case 0x0c:          /* Controller Ram Parity */
+               case 0x04:          /* Initial Controller Power-up */
+               case 0x05:          /* Unexpected Bus Phase */
+               case 0x06:          /* Unexpected Bus Free */
+               case 0x08:          /* SCSI Hung */
+               case 0x09:          /* Unexpected Message Reject */
+               case 0x0a:          /* SCSI Bus Reset Stuck */
+               case 0x0b:          /* Auto Request-Sense Failed */
+               default:
+                  status = DID_ERROR << 16;
+                  break;
+               }
+   
+            SCpnt->result = status | spp->target_status;
+            HD(j)->iocount++;
+
+            if (loops > 1) HD(j)->multicount++;
+
+#if defined (DEBUG_INTERRUPT)
+            if (SCpnt->result || do_trace)
+#else
+            if ((spp->adapter_status != ASOK && HD(j)->iocount >  1000) ||
+                (spp->adapter_status != ASOK && 
+                 spp->adapter_status != ASST && HD(j)->iocount <= 1000) ||
+                do_trace)
+#endif
+               printk("%s: ihdlr, mbox %d, err 0x%x:%x,"\
+                      " target %d:%d, pid %ld, count %d.\n",
+                      BN(j), i, spp->adapter_status, spp->target_status,
+                      SCpnt->target, SCpnt->lun, SCpnt->pid, HD(j)->iocount);
+   
+            /* Set the command state to inactive */
+            SCpnt->host_scribble = NULL;
+   
+            restore_flags(flags);
+            SCpnt->scsi_done(SCpnt);
+            cli();
+
+            }   /* Mailbox loop */
+
+         }   /* Multiple command loop */
+
+      }   /* Boards loop */
+
+   calls[irq]++;
+
+   if (total_loops == 0) 
+     printk("%s: ihdlr, irq %d, no command completed, calls %d.\n",
+            driver_name, irq, calls[irq]);
+
+   if (do_trace) printk("%s: ihdlr, exit, irq %d, calls %d.\n", 
+                        driver_name, irq, calls[irq]);
+
+#if defined (DEBUG_STATISTICS)
+   if ((calls[irq] % 100000) == 10000)
+      for (j = 0; sh[j] != NULL; j++)
+         printk("%s: ihdlr, calls %d, count %d, multi %d.\n", BN(j),
+                calls[(sh[j]->irq)], HD(j)->iocount, HD(j)->multicount);
+#endif
+
+   restore_flags(flags);
+   return;
+}