/* * Written by Julian Elischer (julian@tfs.com) * for TRW Financial Systems for use under the MACH(2.5) operating system. * * TRW Financial Systems, in accordance with their agreement with Carnegie * Mellon University, makes this software available to CMU to distribute * or use in any manner that they see fit as long as this message is kept with * the software. For this reason TFS also grants any other persons or * organisations permission to use or modify this software. * * TFS supplies this software to be publicly redistributed * on the understanding that TFS is not responsible for the correct * functioning of this software in any circumstances. * * $Id: bt742a.c,v 1.8 1993/10/12 07:15:35 rgrimes Exp $ */ /* * bt742a SCSI driver */ #include #include #include #include #include #include #include #include #include #ifdef MACH /* EITHER CMU OR OSF */ #include #include #include #ifdef OSF /* OSF ONLY */ #include #include #include #include #else OSF /* CMU ONLY */ #include #include #endif OSF #endif MACH /* end of MACH specific */ #ifdef __386BSD__ /* 386BSD specific */ #define isa_dev isa_device #define dev_unit id_unit #define dev_addr id_iobase #include #include #include #endif __386BSD__ #ifdef __386BSD__ #include "ddb.h" #if NDDB > 0 int Debugger(); #else NDDB #define Debugger() panic("should call debugger here (bt742a.c)") #endif NDDB #endif __386BSD__ #ifdef MACH int Debugger(); #endif MACH extern int hz; extern int delaycount; /* from clock setup code */ typedef unsigned long int physaddr; /* * I/O Port Interface */ #define BT_BASE bt_base[unit] #define BT_CTRL_STAT_PORT (BT_BASE + 0x0) /* control & status */ #define BT_CMD_DATA_PORT (BT_BASE + 0x1) /* cmds and datas */ #define BT_INTR_PORT (BT_BASE + 0x2) /* Intr. stat */ /* * BT_CTRL_STAT bits (write) */ #define BT_HRST 0x80 /* Hardware reset */ #define BT_SRST 0x40 /* Software reset */ #define BT_IRST 0x20 /* Interrupt reset */ #define BT_SCRST 0x10 /* SCSI bus reset */ /* * BT_CTRL_STAT bits (read) */ #define BT_STST 0x80 /* Self test in Progress */ #define BT_DIAGF 0x40 /* Diagnostic Failure */ #define BT_INIT 0x20 /* Mbx Init required */ #define BT_IDLE 0x10 /* Host Adapter Idle */ #define BT_CDF 0x08 /* cmd/data out port full */ #define BT_DF 0x04 /* Data in port full */ #define BT_INVDCMD 0x01 /* Invalid command */ /* * BT_CMD_DATA bits (write) */ #define BT_NOP 0x00 /* No operation */ #define BT_MBX_INIT 0x01 /* Mbx initialization */ #define BT_START_SCSI 0x02 /* start scsi command */ #define BT_START_BIOS 0x03 /* start bios command */ #define BT_INQUIRE 0x04 /* Adapter Inquiry */ #define BT_MBO_INTR_EN 0x05 /* Enable MBO available interrupt */ #define BT_SEL_TIMEOUT_SET 0x06 /* set selection time-out */ #define BT_BUS_ON_TIME_SET 0x07 /* set bus-on time */ #define BT_BUS_OFF_TIME_SET 0x08 /* set bus-off time */ #define BT_SPEED_SET 0x09 /* set transfer speed */ #define BT_DEV_GET 0x0a /* return installed devices */ #define BT_CONF_GET 0x0b /* return configuration data */ #define BT_TARGET_EN 0x0c /* enable target mode */ #define BT_SETUP_GET 0x0d /* return setup data */ #define BT_WRITE_CH2 0x1a /* write channel 2 buffer */ #define BT_READ_CH2 0x1b /* read channel 2 buffer */ #define BT_WRITE_FIFO 0x1c /* write fifo buffer */ #define BT_READ_FIFO 0x1d /* read fifo buffer */ #define BT_ECHO 0x1e /* Echo command data */ #define BT_MBX_INIT_EXTENDED 0x81 /* Mbx initialization */ #define BT_INQUIRE_EXTENDED 0x8D /* Adapter Setup Inquiry */ /* Follows command appeared at FirmWare 3.31 */ #define BT_ROUND_ROBIN 0x8f /* Enable/Disable(default) round robin */ #define BT_DISABLE 0x00 /* Parameter value for Disable */ #define BT_ENABLE 0x01 /* Parameter value for Enable */ struct bt_cmd_buf { u_char byte[16]; }; /* * BT_INTR_PORT bits (read) */ #define BT_ANY_INTR 0x80 /* Any interrupt */ #define BT_SCRD 0x08 /* SCSI reset detected */ #define BT_HACC 0x04 /* Command complete */ #define BT_MBOA 0x02 /* MBX out empty */ #define BT_MBIF 0x01 /* MBX in full */ /* * Mail box defs */ #define BT_MBX_SIZE 255 /* mail box size (MAX 255 MBxs) */ #define BT_CCB_SIZE 32 /* store up to 32CCBs at any one time */ /* in bt742a H/W ( Not MAX ? ) */ #define bt_nextmbx( wmb, mbx, mbio ) \ if ( (wmb) == &((mbx)->mbio[BT_MBX_SIZE - 1 ]) ) { \ (wmb) = &((mbx)->mbio[0]); \ } else { \ (wmb)++; \ } typedef struct bt_mbx_out { physaddr ccb_addr; unsigned char dummy[3]; unsigned char cmd; } BT_MBO; typedef struct bt_mbx_in{ physaddr ccb_addr; unsigned char btstat; unsigned char sdstat; unsigned char dummy; unsigned char stat; } BT_MBI; struct bt_mbx { BT_MBO mbo[BT_MBX_SIZE]; BT_MBI mbi[BT_MBX_SIZE]; BT_MBO *tmbo; /* Target Mail Box out */ BT_MBI *tmbi; /* Target Mail Box in */ }; /* * mbo.cmd values */ #define BT_MBO_FREE 0x0 /* MBO entry is free */ #define BT_MBO_START 0x1 /* MBO activate entry */ #define BT_MBO_ABORT 0x2 /* MBO abort entry */ #define BT_MBI_FREE 0x0 /* MBI entry is free */ #define BT_MBI_OK 0x1 /* completed without error */ #define BT_MBI_ABORT 0x2 /* aborted ccb */ #define BT_MBI_UNKNOWN 0x3 /* Tried to abort invalid CCB */ #define BT_MBI_ERROR 0x4 /* Completed with error */ extern struct bt_mbx bt_mbx[]; #if defined(BIG_DMA) /* #define BT_NSEG 8192 /* Number of scatter gather segments - to much vm */ #define BT_NSEG 512 #else #define BT_NSEG 33 #endif /* BIG_DMA */ struct bt_scat_gath { unsigned long seg_len; physaddr seg_addr; }; struct bt_ccb { unsigned char opcode; unsigned char :3,data_in:1,data_out:1,:3; unsigned char scsi_cmd_length; unsigned char req_sense_length; /*------------------------------------longword boundary */ unsigned long data_length; /*------------------------------------longword boundary */ physaddr data_addr; /*------------------------------------longword boundary */ unsigned char dummy[2]; unsigned char host_stat; unsigned char target_stat; /*------------------------------------longword boundary */ unsigned char target; unsigned char lun; unsigned char scsi_cmd[12]; /* 12 bytes (bytes only)*/ unsigned char dummy2[1]; unsigned char link_id; /*------------------------------------4 longword boundary */ physaddr link_addr; /*------------------------------------longword boundary */ physaddr sense_ptr; /*------------------------------------longword boundary */ struct scsi_sense_data scsi_sense; /*------------------------------------longword boundary */ struct bt_scat_gath scat_gath[BT_NSEG]; /*------------------------------------longword boundary */ struct bt_ccb *next; /*------------------------------------longword boundary */ struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */ /*------------------------------------longword boundary */ struct bt_mbx_out *mbx; /* pointer to mail box */ /*------------------------------------longword boundary */ int flags; #define CCB_FREE 0 #define CCB_ACTIVE 1 #define CCB_ABORTED 2 }; /* * opcode fields */ #define BT_INITIATOR_CCB 0x00 /* SCSI Initiator CCB */ #define BT_TARGET_CCB 0x01 /* SCSI Target CCB */ #define BT_INIT_SCAT_GATH_CCB 0x02 /* SCSI Initiator with scattter gather*/ #define BT_RESET_CCB 0x81 /* SCSI Bus reset */ /* * bt_ccb.host_stat values */ #define BT_OK 0x00 /* cmd ok */ #define BT_LINK_OK 0x0a /* Link cmd ok */ #define BT_LINK_IT 0x0b /* Link cmd ok + int */ #define BT_SEL_TIMEOUT 0x11 /* Selection time out */ #define BT_OVER_UNDER 0x12 /* Data over/under run */ #define BT_BUS_FREE 0x13 /* Bus dropped at unexpected time */ #define BT_INV_BUS 0x14 /* Invalid bus phase/sequence */ #define BT_BAD_MBO 0x15 /* Incorrect MBO cmd */ #define BT_BAD_CCB 0x16 /* Incorrect ccb opcode */ #define BT_BAD_LINK 0x17 /* Not same values of LUN for links */ #define BT_INV_TARGET 0x18 /* Invalid target direction */ #define BT_CCB_DUP 0x19 /* Duplicate CCB received */ #define BT_INV_CCB 0x1a /* Invalid CCB or segment list */ #define BT_ABORTED 42 /* pseudo value from driver */ struct bt_boardID { u_char board_type; u_char custom_feture; char firm_revision; u_char firm_version; }; struct bt_setup { u_char sync_neg:1; u_char parity:1; u_char :6; u_char speed; u_char bus_on; u_char bus_off; u_char num_mbx; u_char mbx[3]; struct { u_char offset:4; u_char period:3; u_char valid:1; }sync[8]; u_char disc_sts; }; struct bt_config { u_char chan; u_char intr; u_char scsi_dev:3; u_char :5; }; #define INT9 0x01 #define INT10 0x02 #define INT11 0x04 #define INT12 0x08 #define INT14 0x20 #define INT15 0x40 #define EISADMA 0x00 #define CHAN0 0x01 #define CHAN5 0x20 #define CHAN6 0x40 #define CHAN7 0x80 #ifdef MACH extern physaddr kvtophys(); #define PHYSTOKV(x) phystokv(x) #define KVTOPHYS(x) kvtophys(x) #endif MACH #ifdef __386BSD__ #define KVTOPHYS(x) vtophys(x) #endif __386BSD__ #define PAGESIZ 4096 #define INVALIDATE_CACHE {asm volatile( ".byte 0x0F ;.byte 0x08" ); } u_char bt_scratch_buf[256]; #ifdef MACH caddr_t bt_base[NBT]; /* base port for each board */ #else MACH short bt_base[NBT]; /* base port for each board */ #endif MACH struct bt_mbx bt_mbx[NBT]; struct bt_ccb *bt_ccb_free[NBT]; struct bt_ccb bt_ccb[NBT][BT_CCB_SIZE]; struct scsi_xfer bt_scsi_xfer[NBT]; struct isa_dev *btinfo[NBT]; struct bt_ccb *bt_get_ccb(); int bt_int[NBT]; int bt_dma[NBT]; int bt_scsi_dev[NBT]; int bt_initialized[NBT]; #if defined(OSF) int bt_attached[NBT]; #endif /* defined(OSF) */ /***********debug values *************/ #define BT_SHOWCCBS 0x01 #define BT_SHOWINTS 0x02 #define BT_SHOWCMDS 0x04 #define BT_SHOWMISC 0x08 int bt_debug = 0; int btprobe(), btattach(); int btintr(); #ifdef MACH struct isa_driver btdriver = { btprobe, 0, btattach, "bt", 0, 0, 0}; int (*btintrs[])() = {btintr, 0}; #endif MACH #ifdef __386BSD__ struct isa_driver btdriver = { btprobe, btattach, "bt"}; #endif __386BSD__ static int btunit = 0; int bt_scsi_cmd(); int bt_timeout(); void btminphys(); long int bt_adapter_info(); struct scsi_switch bt_switch = { bt_scsi_cmd, btminphys, 0, 0, bt_adapter_info, "bt", 0,0 }; #define BT_CMD_TIMEOUT_FUDGE 200 /* multiplied to get Secs */ #define BT_RESET_TIMEOUT 1000000 #define BT_SCSI_TIMEOUT_FUDGE 20 /* divided by for mSecs */ /***********************************************************************\ * bt_cmd(unit,icnt, ocnt,wait, retval, opcode, args) * * Activate Adapter command * * icnt: number of args (outbound bytes written after opcode) * * ocnt: number of expected returned bytes * * wait: number of seconds to wait for response * * retval: buffer where to place returned bytes * * opcode: opcode BT_NOP, BT_MBX_INIT, BT_START_SCSI ... * * args: parameters * * * * Performs an adapter command through the ports. Not to be confused * * with a scsi command, which is read in via the dma * * One of the adapter commands tells it to read in a scsi command * \***********************************************************************/ bt_cmd(unit,icnt, ocnt, wait,retval, opcode, args) u_char *retval; unsigned opcode; u_char args; { unsigned *ic = &opcode; u_char oc; register i; int sts; /*******************************************************\ * multiply the wait argument by a big constant * * zero defaults to 1 * \*******************************************************/ if(!wait) wait = BT_CMD_TIMEOUT_FUDGE * delaycount; else wait *= BT_CMD_TIMEOUT_FUDGE * delaycount; /*******************************************************\ * Wait for the adapter to go idle, unless it's one of * * the commands which don't need this * \*******************************************************/ if (opcode != BT_MBX_INIT && opcode != BT_START_SCSI) { i = BT_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec?*/ while (--i) { sts = inb(BT_CTRL_STAT_PORT); if (sts & BT_IDLE) { break; } } if (!i) { printf("bt%d: bt_cmd, host not idle(0x%x)\n",unit,sts); return(ENXIO); } } /*******************************************************\ * Now that it is idle, if we expect output, preflush the* * queue feeding to us. * \*******************************************************/ if (ocnt) { while((inb(BT_CTRL_STAT_PORT)) & BT_DF) inb(BT_CMD_DATA_PORT); } /*******************************************************\ * Output the command and the number of arguments given * * for each byte, first check the port is empty. * \*******************************************************/ icnt++; /* include the command */ while (icnt--) { sts = inb(BT_CTRL_STAT_PORT); for (i=0; i< wait; i++) { sts = inb(BT_CTRL_STAT_PORT); if (!(sts & BT_CDF)) break; } if (i >= wait) { printf("bt%d: bt_cmd, cmd/data port full\n",unit); outb(BT_CTRL_STAT_PORT, BT_SRST); return(ENXIO); } outb(BT_CMD_DATA_PORT, (u_char)(*ic++)); } /*******************************************************\ * If we expect input, loop that many times, each time, * * looking for the data register to have valid data * \*******************************************************/ while (ocnt--) { sts = inb(BT_CTRL_STAT_PORT); for (i=0; i< wait; i++) { sts = inb(BT_CTRL_STAT_PORT); if (sts & BT_DF) break; } if (i >= wait) { printf("bt%d: bt_cmd, cmd/data port empty %d\n", unit,ocnt); return(ENXIO); } oc = inb(BT_CMD_DATA_PORT); if (retval) *retval++ = oc; } /*******************************************************\ * Wait for the board to report a finised instruction * \*******************************************************/ i=BT_CMD_TIMEOUT_FUDGE * delaycount; /* 1 sec? */ while (--i) { sts = inb(BT_INTR_PORT); if (sts & BT_HACC) { break; } } if (!i) { printf("bt%d: bt_cmd, host not finished(0x%x)\n",unit,sts); return(ENXIO); } outb(BT_CTRL_STAT_PORT, BT_IRST); return(0); } /*******************************************************\ * Check if the device can be found at the port given * * and if so, set it up ready for further work * * as an argument, takes the isa_dev structure from * * autoconf.c * \*******************************************************/ btprobe(dev) struct isa_dev *dev; { /***********************************************\ * find unit and check we have that many defined * \***********************************************/ int unit = btunit; #if defined(OSF) static ihandler_t bt_handler[NBT]; static ihandler_id_t *bt_handler_id[NBT]; register ihandler_t *chp = &bt_handler[unit];; #endif /* defined(OSF) */ dev->dev_unit = unit; bt_base[unit] = dev->dev_addr; if(unit >= NBT) { printf("bt%d: unit number too high\n",unit); return(0); } /***********************************************\ * Try initialise a unit at this location * * sets up dma and bus speed, loads bt_int[unit]* \***********************************************/ if (bt_init(unit) != 0) { return(0); } /***********************************************\ * If it's there, put in it's interrupt vectors * \***********************************************/ #ifdef MACH dev->dev_pic = bt_int[unit]; #if defined(OSF) /* OSF */ chp->ih_level = dev->dev_pic; chp->ih_handler = dev->dev_intr[0]; chp->ih_resolver = i386_resolver; chp->ih_rdev = dev; chp->ih_stats.intr_type = INTR_DEVICE; chp->ih_stats.intr_cnt = 0; chp->ih_hparam[0].intparam = unit; if ((bt_handler_id[unit] = handler_add(chp)) != NULL) handler_enable(bt_handler_id[unit]); else panic("Unable to add bt interrupt handler"); #else /* CMU */ take_dev_irq(dev); #endif /* !defined(OSF) */ printf("port=%x spl=%d\n", dev->dev_addr, dev->dev_spl); #endif MACH #ifdef __386BSD__ /* 386BSD */ dev->id_irq = (1 << bt_int[unit]); dev->id_drq = bt_dma[unit]; #endif __386BSD__ btunit++; return(1); } /***********************************************\ * Attach all the sub-devices we can find * \***********************************************/ btattach(dev) struct isa_dev *dev; { int unit = dev->dev_unit; /***********************************************\ * ask the adapter what subunits are present * \***********************************************/ scsi_attachdevs( unit, bt_scsi_dev[unit], &bt_switch); #if defined(OSF) bt_attached[unit]=1; #endif /* defined(OSF) */ return; } /***********************************************\ * Return some information to the caller about * * the adapter and it's capabilities * \***********************************************/ long int bt_adapter_info(unit) int unit; { return(2); /* 2 outstanding requests at a time per device */ } /***********************************************\ * Catch an interrupt from the adaptor * \***********************************************/ btintr(unit) { BT_MBI *wmbi; struct bt_mbx *wmbx; struct bt_ccb *ccb; unsigned char stat; int i,wait; int found = 0; #ifdef UTEST if(scsi_debug & PRINTROUTINES) printf("btintr "); #endif /***********************************************\ * First acknowlege the interrupt, Then if it's * * not telling about a completed operation * * just return. * \***********************************************/ stat = inb(BT_INTR_PORT); /* Mail Box out empty ? */ if ( stat & BT_MBOA ) { printf("bt%d: Available Free mbo post\n",unit); /* Disable MBO available interrupt */ outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN); wait = BT_CMD_TIMEOUT_FUDGE * delaycount; for (i=0; i< wait; i++) { if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF)) break; } if (i >= wait) { printf("bt%d: bt_intr, cmd/data port full\n",unit); outb(BT_CTRL_STAT_PORT, BT_SRST); return 1; } outb(BT_CMD_DATA_PORT, 0x00); /* Disable */ wakeup(&bt_mbx[unit]); outb(BT_CTRL_STAT_PORT, BT_IRST); return 1; } if (! (stat & BT_MBIF)) { outb(BT_CTRL_STAT_PORT, BT_IRST); return 1; } #if defined(OSF) if (!bt_attached[unit]) { return(1); } #endif /* defined(OSF) */ /***********************************************\ * If it IS then process the competed operation * \***********************************************/ wmbx = &bt_mbx[unit]; wmbi = wmbx->tmbi; AGAIN: while ( wmbi->stat != BT_MBI_FREE ) { found++; ccb = (struct bt_ccb *)PHYSTOKV((wmbi->ccb_addr)); if((stat = wmbi->stat) != BT_MBI_OK) { switch(stat) { case BT_MBI_ABORT: #ifdef UTEST if(bt_debug & BT_SHOWMISC) printf("abort "); #endif ccb->host_stat = BT_ABORTED; break; case BT_MBI_UNKNOWN: ccb = (struct bt_ccb *)0; #ifdef UTEST if(bt_debug & BT_SHOWMISC) printf("unknown ccb for abort"); #endif break; case BT_MBI_ERROR: break; default: panic("Impossible mbxi status"); } #ifdef UTEST if((bt_debug & BT_SHOWCMDS ) && ccb) { u_char *cp; cp = ccb->scsi_cmd; printf("op=%x %x %x %x %x %x\n", cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); printf("stat %x for mbi addr = 0x%08x\n" , wmbi->stat, wmbi ); printf("addr = 0x%x\n", ccb); } #endif } wmbi->stat = BT_MBI_FREE; if(ccb) { untimeout(bt_timeout,ccb); bt_done(unit,ccb); } /* Set the IN mail Box pointer for next */ bt_nextmbx( wmbi, wmbx, mbi ); } if ( !found ) { for ( i = 0; i < BT_MBX_SIZE; i++) { if ( wmbi->stat != BT_MBI_FREE ) { found ++; break; } bt_nextmbx( wmbi, wmbx, mbi ); } if ( !found ) { printf("bt%d: mbi at 0x%08x should be found, stat=%02x..resync\n", unit, wmbi, stat ); } else { found = 0; goto AGAIN; } } wmbx->tmbi = wmbi; outb(BT_CTRL_STAT_PORT, BT_IRST); return(1); } /***********************************************\ * A ccb (and hence a mbx-out is put onto the * * free list. * \***********************************************/ bt_free_ccb(unit,ccb, flags) struct bt_ccb *ccb; { unsigned int opri; #ifdef UTEST if(scsi_debug & PRINTROUTINES) printf("ccb%d(0x%x)> ",unit,flags); #endif if (!(flags & SCSI_NOMASK)) opri = splbio(); ccb->next = bt_ccb_free[unit]; bt_ccb_free[unit] = ccb; ccb->flags = CCB_FREE; /***********************************************\ * If there were none, wake abybody waiting for * * one to come free, starting with queued entries* \***********************************************/ if (!ccb->next) { wakeup(&bt_ccb_free[unit]); } if (!(flags & SCSI_NOMASK)) splx(opri); } /***********************************************\ * Get a free ccb * \***********************************************/ struct bt_ccb * bt_get_ccb(unit,flags) { unsigned opri; struct bt_ccb *rc; struct bt_mbx *wmbx; /* Mail Box pointer specified unit */ BT_MBO *wmbo; /* Out Mail Box pointer */ #ifdef UTEST if(scsi_debug & PRINTROUTINES) printf("next; rc->flags = CCB_ACTIVE; #ifdef HE /* Get the Target OUT mail Box pointer */ wmbx = &bt_mbx[unit]; wmbo = wmbx->tmbo; while ( wmbo->cmd != BT_MBO_FREE ) { /* Enable MBO available interrupt */ outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN); printf("Wait free mbo.."); /* AMURAI */ sleep( wmbx, PRIBIO); printf("Got free mbo\n"); /* AMURAI */ } /* Link CCB to the Mail Box */ rc->mbx = wmbo; wmbo->ccb_addr = KVTOPHYS(rc); /* Set the OUT mail Box pointer for next */ bt_nextmbx( wmbo, wmbx, mbo ); wmbx->tmbo = wmbo; #endif } if (!(flags & SCSI_NOMASK)) splx(opri); return(rc); } /***********************************************\ * Get a MBO and then Send it * \***********************************************/ BT_MBO *bt_send_mbo( int unit, int flags, int cmd, struct bt_ccb *ccb ) { unsigned opri; BT_MBO *wmbo; /* Mail Box Out pointer */ struct bt_mbx *wmbx; /* Mail Box pointer specified unit */ int i, wait; wmbx = &bt_mbx[unit]; if (!(flags & SCSI_NOMASK)) opri = splbio(); /* Get the Target OUT mail Box pointer and move to Next */ wmbo = wmbx->tmbo; wmbx->tmbo = ( wmbo == &( wmbx->mbo[BT_MBX_SIZE - 1 ] ) ? &(wmbx->mbo[0]) : wmbo + 1 ); /* * Check the outmail box is free or not * Note: Under the normal operation, it shuld NOT happen to wait. */ while ( wmbo->cmd != BT_MBO_FREE ) { wait = BT_CMD_TIMEOUT_FUDGE * delaycount; /* Enable MBO available interrupt */ outb(BT_CMD_DATA_PORT,BT_MBO_INTR_EN); for (i=0; i< wait; i++) { if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF)) break; } if (i >= wait) { printf("bt%d: bt_send_mbo, cmd/data port full\n",unit); outb(BT_CTRL_STAT_PORT, BT_SRST); return( (BT_MBO *)0 ); } outb(BT_CMD_DATA_PORT, 0x01); /* Enable */ sleep( wmbx, PRIBIO); } /* Link CCB to the Mail Box */ wmbo->ccb_addr = KVTOPHYS(ccb); ccb->mbx = wmbo; wmbo->cmd = cmd; /* Send it ! */ outb(BT_CMD_DATA_PORT, BT_START_SCSI); if (!(flags & SCSI_NOMASK)) splx(opri); return(wmbo); } /***********************************************\ * We have a ccb which has been processed by the * * adaptor, now we look to see how the operation * * went. Wake up the owner if waiting * \***********************************************/ bt_done(unit,ccb) struct bt_ccb *ccb; { struct scsi_sense_data *s1,*s2; struct scsi_xfer *xs = ccb->xfer; #ifdef UTEST if(scsi_debug & (PRINTROUTINES | TRACEINTERRUPTS)) printf("bt_done "); #endif /***********************************************\ * Otherwise, put the results of the operation * * into the xfer and call whoever started it * \***********************************************/ if ( ( ccb->host_stat != BT_OK || ccb->target_stat != SCSI_OK) && (!(xs->flags & SCSI_ERR_OK))) { s1 = &(ccb->scsi_sense); s2 = &(xs->sense); if(ccb->host_stat) { switch(ccb->host_stat) { case BT_ABORTED: /* No response */ case BT_SEL_TIMEOUT: /* No response */ #ifdef UTEST if (bt_debug & BT_SHOWMISC) { printf("timeout reported back\n"); } #endif xs->error = XS_TIMEOUT; break; default: /* Other scsi protocol messes */ xs->error = XS_DRIVER_STUFFUP; #ifdef UTEST if (bt_debug & BT_SHOWMISC) { printf("unexpected host_stat: %x\n", ccb->host_stat); } #endif } } else { switch(ccb->target_stat) { case 0x02: /* structure copy!!!!!*/ *s2=*s1; xs->error = XS_SENSE; break; case 0x08: xs->error = XS_BUSY; break; default: #ifdef UTEST if (bt_debug & BT_SHOWMISC) { printf("unexpected target_stat: %x\n", ccb->target_stat); } #endif xs->error = XS_DRIVER_STUFFUP; } } } else /* All went correctly OR errors expected */ { xs->resid = 0; } xs->flags |= ITSDONE; bt_free_ccb(unit,ccb, xs->flags); if(xs->when_done) (*(xs->when_done))(xs->done_arg,xs->done_arg2); } /***********************************************\ * Start the board, ready for normal operation * \***********************************************/ bt_init(unit) int unit; { unsigned char ad[4]; volatile int i,sts; struct bt_config conf; /***********************************************\ * reset board, If it doesn't respond, assume * * that it's not there.. good for the probe * \***********************************************/ outb(BT_CTRL_STAT_PORT, BT_HRST|BT_SRST); for (i=0; i < BT_RESET_TIMEOUT; i++) { sts = inb(BT_CTRL_STAT_PORT) ; if ( sts == (BT_IDLE | BT_INIT)) break; } if (i >= BT_RESET_TIMEOUT) { #ifdef UTEST if (bt_debug & BT_SHOWMISC) printf("bt_init: No answer from bt742a board\n"); #endif return(ENXIO); } /***********************************************\ * Assume we have a board at this stage * * setup dma channel from jumpers and save int * * level * \***********************************************/ #ifdef __386BSD__ printf("bt%d: reading board settings, ",unit); #else __386BSD__ printf("bt%d:",unit); #endif __386BSD__ bt_cmd(unit,0, sizeof(conf), 0 ,&conf, BT_CONF_GET); switch(conf.chan) { case EISADMA: bt_dma[unit] = -1; break; case CHAN0: outb(0x0b, 0x0c); outb(0x0a, 0x00); bt_dma[unit] = 0; break; case CHAN5: outb(0xd6, 0xc1); outb(0xd4, 0x01); bt_dma[unit] = 5; break; case CHAN6: outb(0xd6, 0xc2); outb(0xd4, 0x02); bt_dma[unit] = 6; break; case CHAN7: outb(0xd6, 0xc3); outb(0xd4, 0x03); bt_dma[unit] = 7; break; default: printf("illegal dma setting %x\n",conf.chan); return(EIO); } if (bt_dma[unit] == -1) printf("eisa dma, "); else printf("dma=%d, ",bt_dma[unit]); switch(conf.intr) { case INT9: bt_int[unit] = 9; break; case INT10: bt_int[unit] = 10; break; case INT11: bt_int[unit] = 11; break; case INT12: bt_int[unit] = 12; break; case INT14: bt_int[unit] = 14; break; case INT15: bt_int[unit] = 15; break; default: printf("illegal int setting\n"); return(EIO); } #ifdef __386BSD__ printf("int=%d\n",bt_int[unit]); #else printf("int=%d ",bt_int[unit]); #endif __386BSD__ /* who are we on the scsi bus */ bt_scsi_dev[unit] = conf.scsi_dev; /***********************************************\ * Initialize mail box * \***********************************************/ *((physaddr *)ad) = KVTOPHYS(&bt_mbx[unit]); bt_cmd(unit,5, 0, 0, 0, BT_MBX_INIT_EXTENDED , BT_MBX_SIZE , ad[0] , ad[1] , ad[2] , ad[3]); /***********************************************\ * Set Pointer chain null for just in case * * Link the ccb's into a free-list W/O mbox * * Initilize Mail Box stat to Free * \***********************************************/ if ( bt_ccb_free[unit] != (struct bt_ccb *)0 ) { printf("bt%d: bt_ccb_free is NOT initialized but init here\n", unit); bt_ccb_free[unit] = (struct bt_ccb *)0; } for (i=0; i < BT_CCB_SIZE; i++) { bt_ccb[unit][i].next = bt_ccb_free[unit]; bt_ccb_free[unit] = &bt_ccb[unit][i]; bt_ccb_free[unit]->flags = CCB_FREE; } for (i=0; i < BT_MBX_SIZE; i++) { bt_mbx[unit].mbo[i].cmd = BT_MBO_FREE; bt_mbx[unit].mbi[i].stat = BT_MBI_FREE; } /***********************************************\ * Set up Initial mail box for round-robin * \***********************************************/ bt_mbx[unit].tmbo = &bt_mbx[unit].mbo[0]; bt_mbx[unit].tmbi = &bt_mbx[unit].mbi[0]; bt_inquire_setup_information( unit ); /* Enable round-robin scheme - appeared at FirmWare 3.31 */ bt_cmd(unit, 1, 0, 0, 0, BT_ROUND_ROBIN, BT_ENABLE ); /***********************************************\ * Note that we are going and return (to probe) * \***********************************************/ bt_initialized[unit]++; return( 0 ); } bt_inquire_setup_information( unit ) int unit; { struct bt_setup setup; struct bt_boardID bID; int i; /* Inquire Board ID to Bt742 for FirmWare Version */ bt_cmd(unit, 0, sizeof(bID), 0, &bID, BT_INQUIRE ); printf("bt%d: version %c.%c, ", unit, bID.firm_revision, bID.firm_version ); /* Ask setup information to Bt742 */ bt_cmd(unit, 1, sizeof(setup), 0, &setup, BT_SETUP_GET, sizeof(setup) ); if ( setup.sync_neg ) { printf("sync, "); } else { printf("async, "); } if ( setup.parity ) { printf("parity, "); } else { printf("no parity, "); } printf("%d mbxs, %d ccbs\n", setup.num_mbx, sizeof(bt_ccb)/(sizeof(struct bt_ccb) * NBT) ); for ( i = 0; i < 8; i++ ) { if( !setup.sync[i].offset && !setup.sync[i].period && !setup.sync[i].valid ) continue; printf("bt%d: dev%02d Offset=%d,Transfer period=%d, Synchronous? %s", unit, i, setup.sync[i].offset, setup.sync[i].period, setup.sync[i].valid ? "Yes" : "No" ); } } #ifndef min #define min(x,y) (x < y ? x : y) #endif min void btminphys(bp) struct buf *bp; { #ifdef MACH #if !defined(OSF) bp->b_flags |= B_NPAGES; /* can support scat/gather */ #endif /* defined(OSF) */ #endif MACH if(bp->b_bcount > ((BT_NSEG-1) * PAGESIZ)) { bp->b_bcount = ((BT_NSEG-1) * PAGESIZ); } } /***********************************************\ * start a scsi operation given the command and * * the data address. Also needs the unit, target * * and lu * \***********************************************/ int bt_scsi_cmd(xs) struct scsi_xfer *xs; { struct scsi_sense_data *s1,*s2; struct bt_ccb *ccb; struct bt_scat_gath *sg; int seg; /* scatter gather seg being worked on */ int i = 0; int rc = 0; int thiskv; physaddr thisphys,nextphys; int unit =xs->adapter; int bytes_this_seg,bytes_this_page,datalen,flags; struct iovec *iovp; BT_MBO *mbo; #ifdef UTEST if(scsi_debug & PRINTROUTINES) printf("bt_scsi_cmd "); #endif /***********************************************\ * get a ccb (mbox-out) to use. If the transfer * * is from a buf (possibly from interrupt time) * * then we can't allow it to sleep * \***********************************************/ flags = xs->flags; if(xs->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */ if(flags & ITSDONE) { printf("bt%d: Already done?\n",unit); xs->flags &= ~ITSDONE; } if(!(flags & INUSE)) { printf("bt%d: Not in use?\n",unit); xs->flags |= INUSE; } if (!(ccb = bt_get_ccb(unit,flags))) { xs->error = XS_DRIVER_STUFFUP; return(TRY_AGAIN_LATER); } #ifdef UTEST if(bt_debug & BT_SHOWCCBS) printf("",ccb); #endif /***********************************************\ * Put all the arguments for the xfer in the ccb * \***********************************************/ ccb->xfer = xs; if(flags & SCSI_RESET) { ccb->opcode = BT_RESET_CCB; } else { /* can't use S/G if zero length */ ccb->opcode = (xs->datalen? BT_INIT_SCAT_GATH_CCB :BT_INITIATOR_CCB); } ccb->target = xs->targ;; ccb->data_out = 0; ccb->data_in = 0; ccb->lun = xs->lu; ccb->scsi_cmd_length = xs->cmdlen; ccb->sense_ptr = KVTOPHYS(&(ccb->scsi_sense)); ccb->req_sense_length = sizeof(ccb->scsi_sense); if((xs->datalen) && (!(flags & SCSI_RESET))) { /* can use S/G only if not zero length */ ccb->data_addr = KVTOPHYS(ccb->scat_gath); sg = ccb->scat_gath ; seg = 0; if(flags & SCSI_DATA_UIO) { iovp = ((struct uio *)xs->data)->uio_iov; datalen = ((struct uio *)xs->data)->uio_iovcnt; xs->datalen = 0; while ((datalen) && (seg < BT_NSEG)) { sg->seg_addr = (physaddr)iovp->iov_base; xs->datalen += sg->seg_len = iovp->iov_len; #ifdef UTEST if(scsi_debug & SHOWSCATGATH) printf("(0x%x@0x%x)" ,iovp->iov_len ,iovp->iov_base); #endif sg++; iovp++; seg++; datalen--; } } else { /***********************************************\ * Set up the scatter gather block * \***********************************************/ #ifdef UTEST if(scsi_debug & SHOWSCATGATH) printf("%d @0x%x:- ",xs->datalen,xs->data); #endif datalen = xs->datalen; thiskv = (int)xs->data; thisphys = KVTOPHYS(thiskv); while ((datalen) && (seg < BT_NSEG)) { bytes_this_seg = 0; /* put in the base address */ sg->seg_addr = thisphys; #ifdef UTEST if(scsi_debug & SHOWSCATGATH) printf("0x%x",thisphys); #endif /* do it at least once */ nextphys = thisphys; while ((datalen) && (thisphys == nextphys)) /*********************************************\ * This page is contiguous (physically) with * * the the last, just extend the length * \*********************************************/ { /* how far to the end of the page */ nextphys= (thisphys & (~(PAGESIZ - 1))) + PAGESIZ; bytes_this_page = nextphys - thisphys; /**** or the data ****/ bytes_this_page = min(bytes_this_page ,datalen); bytes_this_seg += bytes_this_page; datalen -= bytes_this_page; /* get more ready for the next page */ thiskv = (thiskv & (~(PAGESIZ - 1))) + PAGESIZ; if(datalen) thisphys = KVTOPHYS(thiskv); } /********************************************\ * next page isn't contiguous, finish the seg * \********************************************/ #ifdef UTEST if(scsi_debug & SHOWSCATGATH) printf("(0x%x)",bytes_this_seg); #endif sg->seg_len = bytes_this_seg; sg++; seg++; } } /*end of iov/kv decision */ ccb->data_length = seg * sizeof(struct bt_scat_gath); #ifdef UTEST if(scsi_debug & SHOWSCATGATH) printf("\n"); #endif if (datalen) { /* there's still data, must have run out of segs! */ printf("bt%d: bt_scsi_cmd, more than %d DMA segs\n", unit,BT_NSEG); xs->error = XS_DRIVER_STUFFUP; bt_free_ccb(unit,ccb,flags); return(HAD_ERROR); } } else { /* No data xfer, use non S/G values */ ccb->data_addr = (physaddr)0; ccb->data_length = 0; } ccb->link_id = 0; ccb->link_addr = (physaddr)0; /***********************************************\ * Put the scsi command in the ccb and start it * \***********************************************/ if(!(flags & SCSI_RESET)) { bcopy(xs->cmd, ccb->scsi_cmd, ccb->scsi_cmd_length); } #ifdef UTEST if(scsi_debug & SHOWCOMMANDS) { u_char *b = ccb->scsi_cmd; if(!(flags & SCSI_RESET)) { int i = 0; printf("bt%d:%d:%d-" ,unit ,ccb->target ,ccb->lun); while(i < ccb->scsi_cmd_length ) { if(i) printf(","); printf("%x",b[i++]); } printf("-\n"); } else { printf("bt%d:%d:%d-RESET- " ,unit ,ccb->target ,ccb->lun ); } } #endif if ( bt_send_mbo( unit, flags, BT_MBO_START, ccb ) == (BT_MBO *)0 ) { xs->error = XS_DRIVER_STUFFUP; bt_free_ccb(unit,ccb,flags); return(TRY_AGAIN_LATER); } /***********************************************\ * Usually return SUCCESSFULLY QUEUED * \***********************************************/ #ifdef UTEST if(scsi_debug & TRACEINTERRUPTS) printf("cmd_sent "); #endif if (!(flags & SCSI_NOMASK)) { timeout(bt_timeout,ccb,(xs->timeout * hz) / 1000); return(SUCCESSFULLY_QUEUED); } else /***********************************************\ * If we can't use interrupts, poll on completion* \***********************************************/ { int done = 0; int count = delaycount * xs->timeout / BT_SCSI_TIMEOUT_FUDGE; struct bt_mbx *wmbx = &bt_mbx[unit]; BT_MBI *wmbi = wmbx->tmbi; unsigned char stat; #ifdef UTEST if(scsi_debug & TRACEINTERRUPTS) printf("wait "); #endif while((!done) && count) { stat = inb(BT_INTR_PORT) & (BT_ANY_INTR | BT_MBIF ); if ( !( stat & BT_ANY_INTR ) || ( wmbi->stat == BT_MBI_FREE )|| (PHYSTOKV(wmbi->ccb_addr) != (int)ccb ) ) { count--; continue; } wmbi->stat = BT_MBI_FREE; bt_done(unit,ccb); done ++; outb(BT_CTRL_STAT_PORT, BT_IRST); /* Set the IN mail Box pointer for next */ bt_nextmbx( wmbi, wmbx, mbi ); wmbx->tmbi = wmbi; } if (!count && !done) { #ifdef UTEST if (!(xs->flags & SCSI_SILENT)) printf("cmd fail\n"); #endif bt_send_mbo( unit, flags, BT_MBO_ABORT, ccb ); count = delaycount * 2000 / BT_SCSI_TIMEOUT_FUDGE; while((!done) && count) { if ( !( stat & BT_ANY_INTR ) || ( wmbi->stat == BT_MBI_FREE )|| ( PHYSTOKV(wmbi->ccb_addr ) != (int)ccb ) ) { count--; continue; } wmbi->stat = BT_MBI_FREE; bt_done(unit,ccb); done ++; outb(BT_CTRL_STAT_PORT, BT_IRST); /* Set the IN mail Box pointer for next */ bt_nextmbx( wmbi, wmbx, mbi ); wmbx->tmbi = wmbi; } if(!count && !done) { printf("bt%d: abort failed in wait\n", unit); ccb->mbx->cmd = BT_MBO_FREE; } bt_free_ccb(unit,ccb,flags); xs->error = XS_DRIVER_STUFFUP; return(HAD_ERROR); } if(xs->error) return(HAD_ERROR); return(COMPLETE); } } bt_timeout(struct bt_ccb *ccb) { int unit; int s = splbio(); unit = ccb->xfer->adapter; printf("bt%d: %d device timed out\n",unit ,ccb->xfer->targ); #ifdef UTEST if(bt_debug & BT_SHOWCCBS) bt_print_active_ccbs(unit); #endif /***************************************\ * If The ccb's mbx is not free, then * * the board has gone Far East ? * \***************************************/ if((struct bt_ccb *)PHYSTOKV(ccb->mbx->ccb_addr)==ccb && ccb->mbx->cmd != BT_MBO_FREE ) { printf("bt%d: not taking commands!\n" ,unit); Debugger(); } /***************************************\ * If it has been through before, then * * a previous abort has failed, don't * * try abort again * \***************************************/ if(ccb->flags == CCB_ABORTED) /* abort timed out */ { printf("bt%d: Abort Operation has timed out\n",unit); ccb->xfer->retries = 0; /* I MEAN IT ! */ ccb->host_stat = BT_ABORTED; bt_done(unit,ccb); } else /* abort the operation that has timed out */ { printf("bt%d: Try to abort\n",unit); bt_send_mbo( unit, ~SCSI_NOMASK, BT_MBO_ABORT, ccb ); /* 2 secs for the abort */ timeout(bt_timeout,ccb,2 * hz); ccb->flags = CCB_ABORTED; } splx(s); } #ifdef UTEST bt_print_ccb(ccb) struct bt_ccb *ccb; { printf("ccb:%x op:%x cmdlen:%d senlen:%d\n" ,ccb ,ccb->opcode ,ccb->scsi_cmd_length ,ccb->req_sense_length); printf(" datlen:%d hstat:%x tstat:%x flags:%x\n" ,ccb->data_length ,ccb->host_stat ,ccb->target_stat ,ccb->flags); } bt_print_active_ccbs(int unit) { struct bt_ccb *ccb; ccb = &(bt_ccb[unit][0]); int i = BT_CCB_SIZE; while(i--) { if(ccb->flags != CCB_FREE) bt_print_ccb(ccb); ccb++; } } #endif /*UTEST*/