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Diffstat (limited to 'sys/i386/eisa/aha1742.c')
| -rw-r--r-- | sys/i386/eisa/aha1742.c | 1420 |
1 files changed, 1420 insertions, 0 deletions
diff --git a/sys/i386/eisa/aha1742.c b/sys/i386/eisa/aha1742.c new file mode 100644 index 0000000..721f6f7 --- /dev/null +++ b/sys/i386/eisa/aha1742.c @@ -0,0 +1,1420 @@ +/* + * 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. + * + * + * PATCHES MAGIC LEVEL PATCH THAT GOT US HERE + * -------------------- ----- ---------------------- + * CURRENT PATCH LEVEL: 1 00098 + * -------------------- ----- ---------------------- + * + * 16 Feb 93 Julian Elischer ADDED for SCSI system + * commenced: Sun Sep 27 18:14:01 PDT 1992 + */ + +#include <sys/types.h> +#include <ahb.h> + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/buf.h> +#include <sys/proc.h> +#include <sys/user.h> + +#ifdef MACH /* EITHER CMU OR OSF */ +#include <i386/ipl.h> +#include <i386at/scsi.h> +#include <i386at/scsiconf.h> + +#ifdef OSF /* OSF ONLY */ +#include <sys/table.h> +#include <i386/handler.h> +#include <i386/dispatcher.h> +#include <i386/AT386/atbus.h> + +#else OSF /* CMU ONLY */ +#include <i386at/atbus.h> +#include <i386/pio.h> +#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 <i386/include/pio.h> +#include <i386/isa/isa_device.h> +#include <scsi/scsi_all.h> +#include <scsi/scsiconf.h> +#endif __386BSD__ + +/* */ + +#ifdef __386BSD__ +#include "ddb.h" +#if NDDB > 0 +int Debugger(); +#else NDDB +#define Debugger() panic("should call debugger here (adaptec.c)") +#endif NDDB +#endif __386BSD__ + +#ifdef MACH +int Debugger(); +#endif MACH + +typedef unsigned long int physaddr; + +#ifdef MACH +extern physaddr kvtophys(); +#define PHYSTOKV(x) phystokv(x) +#define KVTOPHYS(x) kvtophys(x) +#endif MACH + +#ifdef __386BSD__ +#define PHYSTOKV(x) (x | 0xFE000000) +#define KVTOPHYS(x) vtophys(x) +#endif __386BSD__ + +extern int delaycount; /* from clock setup code */ +#define NUM_CONCURRENT 16 /* number of concurrent ops per board */ +#define AHB_NSEG 33 /* number of dma segments supported */ +#define FUDGE(X) (X>>1) /* our loops are slower than spinwait() */ +/* */ +/***********************************************************************\ +* AHA1740 standard EISA Host ID regs (Offset from slot base) * +\***********************************************************************/ +#define HID0 0xC80 /* 0,1: msb of ID2, 3-7: ID1 */ +#define HID1 0xC81 /* 0-4: ID3, 4-7: LSB ID2 */ +#define HID2 0xC82 /* product, 0=174[20] 1 = 1744 */ +#define HID3 0xC83 /* firmware revision */ + +#define CHAR1(B1,B2) (((B1>>2) & 0x1F) | '@') +#define CHAR2(B1,B2) (((B1<<3) & 0x18) | ((B2>>5) & 0x7)|'@') +#define CHAR3(B1,B2) ((B2 & 0x1F) | '@') + +/* AHA1740 EISA board control registers (Offset from slot base) */ +#define EBCTRL 0xC84 +#define CDEN 0x01 +/***********************************************************************\ +* AHA1740 EISA board mode registers (Offset from slot base) * +\***********************************************************************/ +#define PORTADDR 0xCC0 +#define PORTADDR_ENHANCED 0x80 +#define BIOSADDR 0xCC1 +#define INTDEF 0xCC2 +#define SCSIDEF 0xCC3 +#define BUSDEF 0xCC4 +#define RESV0 0xCC5 +#define RESV1 0xCC6 +#define RESV2 0xCC7 +/**** bit definitions for INTDEF ****/ +#define INT9 0x00 +#define INT10 0x01 +#define INT11 0x02 +#define INT12 0x03 +#define INT14 0x05 +#define INT15 0x06 +#define INTHIGH 0x08 /* int high=ACTIVE (else edge) */ +#define INTEN 0x10 +/**** bit definitions for SCSIDEF ****/ +#define HSCSIID 0x0F /* our SCSI ID */ +#define RSTPWR 0x10 /* reset scsi bus on power up or reset */ +/**** bit definitions for BUSDEF ****/ +#define B0uS 0x00 /* give up bus immediatly */ +#define B4uS 0x01 /* delay 4uSec. */ +#define B8uS 0x02 +/***********************************************************************\ +* AHA1740 ENHANCED mode mailbox control regs (Offset from slot base) * +\***********************************************************************/ +#define MBOXOUT0 0xCD0 +#define MBOXOUT1 0xCD1 +#define MBOXOUT2 0xCD2 +#define MBOXOUT3 0xCD3 + +#define ATTN 0xCD4 +#define G2CNTRL 0xCD5 +#define G2INTST 0xCD6 +#define G2STAT 0xCD7 + +#define MBOXIN0 0xCD8 +#define MBOXIN1 0xCD9 +#define MBOXIN2 0xCDA +#define MBOXIN3 0xCDB + +#define G2STAT2 0xCDC + +/*******************************************************\ +* Bit definitions for the 5 control/status registers * +\*******************************************************/ +#define ATTN_TARGET 0x0F +#define ATTN_OPCODE 0xF0 +#define OP_IMMED 0x10 +#define AHB_TARG_RESET 0x80 +#define OP_START_ECB 0x40 +#define OP_ABORT_ECB 0x50 + +#define G2CNTRL_SET_HOST_READY 0x20 +#define G2CNTRL_CLEAR_EISA_INT 0x40 +#define G2CNTRL_HARD_RESET 0x80 + +#define G2INTST_TARGET 0x0F +#define G2INTST_INT_STAT 0xF0 +#define AHB_ECB_OK 0x10 +#define AHB_ECB_RECOVERED 0x50 +#define AHB_HW_ERR 0x70 +#define AHB_IMMED_OK 0xA0 +#define AHB_ECB_ERR 0xC0 +#define AHB_ASN 0xD0 /* for target mode */ +#define AHB_IMMED_ERR 0xE0 + +#define G2STAT_BUSY 0x01 +#define G2STAT_INT_PEND 0x02 +#define G2STAT_MBOX_EMPTY 0x04 + +#define G2STAT2_HOST_READY 0x01 +/* */ + +struct ahb_dma_seg +{ + physaddr addr; + long len; +}; + +struct ahb_ecb_status +{ + u_short status; +# define ST_DON 0x0001 +# define ST_DU 0x0002 +# define ST_QF 0x0008 +# define ST_SC 0x0010 +# define ST_DO 0x0020 +# define ST_CH 0x0040 +# define ST_INT 0x0080 +# define ST_ASA 0x0100 +# define ST_SNS 0x0200 +# define ST_INI 0x0800 +# define ST_ME 0x1000 +# define ST_ECA 0x4000 + u_char ha_status; +# define HS_OK 0x00 +# define HS_CMD_ABORTED_HOST 0x04 +# define HS_CMD_ABORTED_ADAPTER 0x05 +# define HS_TIMED_OUT 0x11 +# define HS_HARDWARE_ERR 0x20 +# define HS_SCSI_RESET_ADAPTER 0x22 +# define HS_SCSI_RESET_INCOMING 0x23 + u_char targ_status; +# define TS_OK 0x00 +# define TS_CHECK_CONDITION 0x02 +# define TS_BUSY 0x08 + u_long resid_count; + u_long resid_addr; + u_short addit_status; + u_char sense_len; + u_char unused[9]; + u_char cdb[6]; +}; + +/* */ + +struct ecb +{ + u_char opcode; +# define ECB_SCSI_OP 0x01 + u_char :4; + u_char options:3; + u_char :1; + short opt1; +# define ECB_CNE 0x0001 +# define ECB_DI 0x0080 +# define ECB_SES 0x0400 +# define ECB_S_G 0x1000 +# define ECB_DSB 0x4000 +# define ECB_ARS 0x8000 + short opt2; +# define ECB_LUN 0x0007 +# define ECB_TAG 0x0008 +# define ECB_TT 0x0030 +# define ECB_ND 0x0040 +# define ECB_DAT 0x0100 +# define ECB_DIR 0x0200 +# define ECB_ST 0x0400 +# define ECB_CHK 0x0800 +# define ECB_REC 0x4000 +# define ECB_NRB 0x8000 + u_short unused1; + physaddr data; + u_long datalen; + physaddr status; + physaddr chain; + short unused2; + short unused3; + physaddr sense; + u_char senselen; + u_char cdblen; + short cksum; + u_char cdb[12]; + /*-----------------end of hardware supported fields----------------*/ + struct ecb *next; /* in free list */ + struct scsi_xfer *xs; /* the scsi_xfer for this cmd */ + long int delta; /* difference from previous*/ + struct ecb *later,*sooner; + int flags; +#define ECB_FREE 0 +#define ECB_ACTIVE 1 +#define ECB_ABORTED 2 +#define ECB_IMMED 4 +#define ECB_IMMED_FAIL 8 + struct ahb_dma_seg ahb_dma[AHB_NSEG]; + struct ahb_ecb_status ecb_status; + struct scsi_sense_data ecb_sense; +}; + +struct ecb *ahb_soonest = (struct ecb *)0; +struct ecb *ahb_latest = (struct ecb *)0; +long int ahb_furtherest = 0; /* longest time in the timeout queue */ +/* */ + +struct ahb_data +{ + int flags; +#define AHB_INIT 0x01; + int baseport; + struct ecb ecbs[NUM_CONCURRENT]; + struct ecb *free_ecb; + int our_id; /* our scsi id */ + int vect; + struct ecb *immed_ecb; /* an outstanding immediete command */ +} ahb_data[NAHB]; + +int ahbprobe(); +int ahb_attach(); +int ahbintr(); +int ahb_scsi_cmd(); +int ahb_timeout(); +struct ecb *cheat; +void ahbminphys(); +long int ahb_adapter_info(); + +#ifdef MACH +struct isa_driver ahbdriver = { ahbprobe, 0, ahb_attach, "ahb", 0, 0, 0}; +int (*ahbintrs[])() = {ahbintr, 0}; +#endif MACH + +#ifdef __386BSD__ +struct isa_driver ahbdriver = { ahbprobe, ahb_attach, "ahb"}; +#endif __386BSD__ + +#define MAX_SLOTS 8 +static ahb_slot = 0; /* slot last board was found in */ +static ahb_unit = 0; +int ahb_debug = 0; +#define AHB_SHOWECBS 0x01 +#define AHB_SHOWINTS 0x02 +#define AHB_SHOWCMDS 0x04 +#define AHB_SHOWMISC 0x08 +#define FAIL 1 +#define SUCCESS 0 +#define PAGESIZ 4096 + +struct scsi_switch ahb_switch = +{ + ahb_scsi_cmd, + ahbminphys, + 0, + 0, + ahb_adapter_info, + 0,0,0 +}; + +/* */ +/***********************************************************************\ +* Function to send a command out through a mailbox * +\***********************************************************************/ +ahb_send_mbox( int unit + ,int opcode + ,int target + ,struct ecb *ecb) +{ + int port = ahb_data[unit].baseport; + int spincount = FUDGE(delaycount) * 1; /* 1ms should be enough */ + int s = splbio(); + int stport = port + G2STAT; + + while( ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) + != (G2STAT_MBOX_EMPTY)) + && (spincount--)); + if(spincount == -1) + { + printf("ahb%d: board not responding\n",unit); + Debugger(); + } + + outl(port + MBOXOUT0,KVTOPHYS(ecb)); /* don't know this will work */ + outb(port + ATTN, opcode|target); + + splx(s); +} + +/***********************************************************************\ +* Function to poll for command completion when in poll mode * +\***********************************************************************/ +ahb_poll(int unit ,int wait) /* in msec */ +{ + int port = ahb_data[unit].baseport; + int spincount = FUDGE(delaycount) * wait; /* in msec */ + int stport = port + G2STAT; +int start = spincount; + +retry: + while( (spincount--) && (!(inb(stport) & G2STAT_INT_PEND))); + if(spincount == -1) + { + printf("ahb%d: board not responding\n",unit); + return(EIO); + } +if ((int)cheat != PHYSTOKV(inl(port + MBOXIN0))) +{ + printf("discarding %x ",inl(port + MBOXIN0)); + outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT); + spinwait(50); + goto retry; +}/* don't know this will work */ + ahbintr(unit); + return(0); +} +/***********************************************************************\ +* Function to send an immediate type command to the adapter * +\***********************************************************************/ +ahb_send_immed( int unit + ,int target + ,u_long cmd) +{ + int port = ahb_data[unit].baseport; + int spincount = FUDGE(delaycount) * 1; /* 1ms should be enough */ + int s = splbio(); + int stport = port + G2STAT; + + while( ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) + != (G2STAT_MBOX_EMPTY)) + && (spincount--)); + if(spincount == -1) + { + printf("ahb%d: board not responding\n",unit); + Debugger(); + } + + outl(port + MBOXOUT0,cmd); /* don't know this will work */ + outb(port + G2CNTRL, G2CNTRL_SET_HOST_READY); + outb(port + ATTN, OP_IMMED | target); + splx(s); +} + +/* */ + +/*******************************************************\ +* Check the slots looking for a board we recognise * +* If we find one, note it's address (slot) and call * +* the actual probe routine to check it out. * +\*******************************************************/ +ahbprobe(dev) +struct isa_dev *dev; +{ + int port; + u_char byte1,byte2,byte3; + ahb_slot++; + while (ahb_slot<8) + { + port = 0x1000 * ahb_slot; + byte1 = inb(port + HID0); + byte2 = inb(port + HID1); + byte3 = inb(port + HID2); + if(byte1 == 0xff) + { + ahb_slot++; + continue; + } + if ((CHAR1(byte1,byte2) == 'A') + && (CHAR2(byte1,byte2) == 'D') + && (CHAR3(byte1,byte2) == 'P') + && ((byte3 == 0 ) || (byte3 == 1))) + { + dev->dev_addr = port; + return(ahbprobe1(dev)); + } + ahb_slot++; + } + 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 * +\*******************************************************/ +ahbprobe1(dev) +struct isa_dev *dev; +{ + /***********************************************\ + * find unit and check we have that many defined * + \***********************************************/ + int unit = ahb_unit; +#if defined(OSF) + static ihandler_t ahb_handler[NAHB]; + static ihandler_id_t *ahb_handler_id[NAHB]; + register ihandler_t *chp = &ahb_handler[unit];; +#endif /* defined(OSF) */ + + dev->dev_unit = unit; + ahb_data[unit].baseport = dev->dev_addr; + if(unit >= NAHB) + { + printf("ahb: unit number (%d) too high\n",unit); + return(0); + } + /***********************************************\ + * Try initialise a unit at this location * + * sets up dma and bus speed, loads ahb_data[unit].vect* + \***********************************************/ + if (ahb_init(unit) != 0) + { + return(0); + } + + /***********************************************\ + * If it's there, put in it's interrupt vectors * + \***********************************************/ +#ifdef MACH +#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 ((ahb_handler_id[unit] = handler_add(chp)) != NULL) + handler_enable(ahb_handler_id[unit]); + else + panic("Unable to add ahb interrupt handler"); +#else /* CMU */ + dev->dev_pic = ahb_data[unit].vect; + 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 << ahb_data[unit].vect); + dev->id_drq = -1; /* use EISA dma */ + printf("\n **"); +#endif __386BSD__ + + ahb_unit++; + return(1); +} + +/***********************************************\ +* Attach all the sub-devices we can find * +\***********************************************/ +ahb_attach(dev) +struct isa_dev *dev; +{ + int unit = dev->dev_unit; + + +#ifdef __386BSD__ + printf(" probing for scsi devices**\n"); +#endif __386BSD__ + + /***********************************************\ + * ask the adapter what subunits are present * + \***********************************************/ + scsi_attachdevs( unit, ahb_data[unit].our_id, &ahb_switch); +#if defined(OSF) + ahb_attached[unit]=1; +#endif /* defined(OSF) */ + if(!unit) /* only one for all boards */ + { + ahb_timeout(0); + } +#ifdef __386BSD__ + printf("ahb%d",unit); +#endif __386BSD__ + return; +} + +/***********************************************\ +* Return some information to the caller about * +* the adapter and it's capabilities * +\***********************************************/ +long int ahb_adapter_info(unit) +int unit; +{ + return(2); /* 2 outstanding requests at a time per device */ +} + +/***********************************************\ +* Catch an interrupt from the adaptor * +\***********************************************/ +ahbintr(unit) +{ + struct ecb *ecb; + unsigned char stat; + register i; + u_char ahbstat; + int target; + long int mboxval; + + int port = ahb_data[unit].baseport; + + if(scsi_debug & PRINTROUTINES) + printf("ahbintr "); + +#if defined(OSF) + if (!ahb_attached[unit]) + { + return(1); + } +#endif /* defined(OSF) */ + while(inb(port + G2STAT) & G2STAT_INT_PEND) + { + /***********************************************\ + * First get all the information and then * + * acknowlege the interrupt * + \***********************************************/ + ahbstat = inb(port + G2INTST); + target = ahbstat & G2INTST_TARGET; + stat = ahbstat & G2INTST_INT_STAT; + mboxval = inl(port + MBOXIN0);/* don't know this will work */ + outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT); + if(scsi_debug & TRACEINTERRUPTS) + printf("status = 0x%x ",stat); + /***********************************************\ + * Process the completed operation * + \***********************************************/ + + if(stat == AHB_ECB_OK) /* common case is fast */ + { + ecb = (struct ecb *)PHYSTOKV(mboxval); + } + else + { + switch(stat) + { + case AHB_IMMED_OK: + ecb = ahb_data[unit].immed_ecb; + ahb_data[unit].immed_ecb = 0; + break; + case AHB_IMMED_ERR: + ecb = ahb_data[unit].immed_ecb; + ecb->flags |= ECB_IMMED_FAIL; + ahb_data[unit].immed_ecb = 0; + break; + case AHB_ASN: /* for target mode */ + ecb = 0; + break; + case AHB_HW_ERR: + ecb = 0; + break; + case AHB_ECB_RECOVERED: + ecb = (struct ecb *)PHYSTOKV(mboxval); + break; + case AHB_ECB_ERR: + ecb = (struct ecb *)PHYSTOKV(mboxval); + break; + default: + printf(" Unknown return from ahb%d(%x)\n",unit,ahbstat); + ecb=0; + } + } + if(ecb) + { + if(ahb_debug & AHB_SHOWCMDS ) + { + ahb_show_scsi_cmd(ecb->xs); + } + if((ahb_debug & AHB_SHOWECBS) && ecb) + printf("<int ecb(%x)>",ecb); + ahb_remove_timeout(ecb); + ahb_done(unit,ecb,((stat == AHB_ECB_OK)?SUCCESS:FAIL)); + } + } + return(1); +} + +/***********************************************\ +* We have a ecb which has been processed by the * +* adaptor, now we look to see how the operation * +* went. * +\***********************************************/ +ahb_done(unit,ecb,state) +int unit,state; +struct ecb *ecb; +{ + struct ahb_ecb_status *stat = &ecb->ecb_status; + struct scsi_sense_data *s1,*s2; + struct scsi_xfer *xs = ecb->xs; + + if(scsi_debug & (PRINTROUTINES | TRACEINTERRUPTS)) + printf("ahb_done "); + /***********************************************\ + * Otherwise, put the results of the operation * + * into the xfer and call whoever started it * + \***********************************************/ + if(ecb->flags & ECB_IMMED) + { + if(ecb->flags & ECB_IMMED_FAIL) + { + xs->error = XS_DRIVER_STUFFUP; + } + goto done; + } + if ( (state == SUCCESS) || (xs->flags & SCSI_ERR_OK)) + { /* All went correctly OR errors expected */ + xs->resid = 0; + xs->error = 0; + } + else + { + + s1 = &(ecb->ecb_sense); + s2 = &(xs->sense); + + if(stat->ha_status) + { + switch(stat->ha_status) + { + case HS_SCSI_RESET_ADAPTER: + break; + case HS_SCSI_RESET_INCOMING: + break; + case HS_CMD_ABORTED_HOST: /* No response */ + case HS_CMD_ABORTED_ADAPTER: /* No response */ + break; + case HS_TIMED_OUT: /* No response */ + if (ahb_debug & AHB_SHOWMISC) + { + printf("timeout reported back\n"); + } + xs->error = XS_TIMEOUT; + break; + default: /* Other scsi protocol messes */ + xs->error = XS_DRIVER_STUFFUP; + if (ahb_debug & AHB_SHOWMISC) + { + printf("unexpected ha_status: %x\n", + stat->ha_status); + } + } + + } + else + { + switch(stat->targ_status) + { + case TS_CHECK_CONDITION: + /* structure copy!!!!!*/ + *s2=*s1; + xs->error = XS_SENSE; + break; + case TS_BUSY: + xs->error = XS_BUSY; + break; + default: + if (ahb_debug & AHB_SHOWMISC) + { + printf("unexpected targ_status: %x\n", + stat->targ_status); + } + xs->error = XS_DRIVER_STUFFUP; + } + } + } +done: xs->flags |= ITSDONE; + ahb_free_ecb(unit,ecb, xs->flags); + if(xs->when_done) + (*(xs->when_done))(xs->done_arg,xs->done_arg2); +} + +/***********************************************\ +* A ecb (and hence a mbx-out is put onto the * +* free list. * +\***********************************************/ +ahb_free_ecb(unit,ecb, flags) +struct ecb *ecb; +{ + unsigned int opri; + + if(scsi_debug & PRINTROUTINES) + printf("ecb%d(0x%x)> ",unit,flags); + if (!(flags & SCSI_NOMASK)) + opri = splbio(); + + ecb->next = ahb_data[unit].free_ecb; + ahb_data[unit].free_ecb = ecb; + ecb->flags = ECB_FREE; + /***********************************************\ + * If there were none, wake abybody waiting for * + * one to come free, starting with queued entries* + \***********************************************/ + if (!ecb->next) { + wakeup(&ahb_data[unit].free_ecb); + } + if (!(flags & SCSI_NOMASK)) + splx(opri); +} + +/***********************************************\ +* Get a free ecb (and hence mbox-out entry) * +\***********************************************/ +struct ecb * +ahb_get_ecb(unit,flags) +{ + unsigned opri; + struct ecb *rc; + + if(scsi_debug & PRINTROUTINES) + printf("<ecb%d(0x%x) ",unit,flags); + if (!(flags & SCSI_NOMASK)) + opri = splbio(); + /***********************************************\ + * If we can and have to, sleep waiting for one * + * to come free * + \***********************************************/ + while ((!(rc = ahb_data[unit].free_ecb)) && (!(flags & SCSI_NOSLEEP))) + { + sleep(&ahb_data[unit].free_ecb, PRIBIO); + } + if (rc) + { + ahb_data[unit].free_ecb = rc->next; + rc->flags = ECB_ACTIVE; + } + if (!(flags & SCSI_NOMASK)) + splx(opri); + return(rc); +} + + + +/***********************************************\ +* Start the board, ready for normal operation * +\***********************************************/ +ahb_init(unit) +int unit; +{ + int port = ahb_data[unit].baseport; + int intdef; + int spincount = FUDGE(delaycount) * 1000; /* 1 sec enough? */ + int i; + int stport = port + G2STAT; +#define NO_NO 1 +#ifdef NO_NO + /***********************************************\ + * reset board, If it doesn't respond, assume * + * that it's not there.. good for the probe * + \***********************************************/ + outb(port + EBCTRL,CDEN); /* enable full card */ + outb(port + PORTADDR,PORTADDR_ENHANCED); + + outb(port + G2CNTRL,G2CNTRL_HARD_RESET); + spinwait(1); + outb(port + G2CNTRL,0); + spinwait(10); + while( ((inb(stport) & G2STAT_BUSY )) + && (spincount--)); + if(spincount == -1) + { + if (ahb_debug & AHB_SHOWMISC) + printf("ahb_init: No answer from bt742a board\n"); + return(ENXIO); + } + i = inb(port + MBOXIN0) & 0xff; + if(i) + { + printf("self test failed, val = 0x%x\n",i); + return(EIO); + } +#endif + while( inb(stport) & G2STAT_INT_PEND) + { + printf("."); + outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT); + spinwait(10); + } + outb(port + EBCTRL,CDEN); /* enable full card */ + outb(port + PORTADDR,PORTADDR_ENHANCED); + /***********************************************\ + * Assume we have a board at this stage * + * setup dma channel from jumpers and save int * + * level * + \***********************************************/ +#ifdef __386BSD__ + printf("ahb%d reading board settings, ",unit); +#define PRNT(x) +#else __386BSD__ + printf("ahb%d:",unit); +#define PRNT(x) printf(x) +#endif __386BSD__ + + intdef = inb(port + INTDEF); + switch(intdef & 0x07) + { + case INT9: + ahb_data[unit].vect = 9; + PRNT("int=9 "); + break; + case INT10: + ahb_data[unit].vect = 10; + PRNT("int=10 "); + break; + case INT11: + ahb_data[unit].vect = 11; + PRNT("int=11 "); + break; + case INT12: + ahb_data[unit].vect = 12; + PRNT("int=12 "); + break; + case INT14: + ahb_data[unit].vect = 14; + PRNT("int=14 "); + break; + case INT15: + ahb_data[unit].vect = 15; + PRNT("int=15 "); + break; + default: + printf("illegal int setting\n"); + return(EIO); + } + outb(port + INTDEF ,(intdef | INTEN)); /* make sure we can interrupt */ + /* who are we on the scsi bus */ + ahb_data[unit].our_id = (inb(port + SCSIDEF) & HSCSIID); + + /***********************************************\ + * link up all our ECBs into a free list * + \***********************************************/ + for (i=0; i < NUM_CONCURRENT; i++) + { + ahb_data[unit].ecbs[i].next = ahb_data[unit].free_ecb; + ahb_data[unit].free_ecb = &ahb_data[unit].ecbs[i]; + ahb_data[unit].free_ecb->flags = ECB_FREE; + } + + /***********************************************\ + * Note that we are going and return (to probe) * + \***********************************************/ + ahb_data[unit].flags |= AHB_INIT; + return( 0 ); +} + + +#ifndef min +#define min(x,y) (x < y ? x : y) +#endif min + + +void ahbminphys(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 > ((AHB_NSEG-1) * PAGESIZ)) + { + bp->b_bcount = ((AHB_NSEG-1) * PAGESIZ); + } +} + +/***********************************************\ +* start a scsi operation given the command and * +* the data address. Also needs the unit, target * +* and lu * +\***********************************************/ +int ahb_scsi_cmd(xs) +struct scsi_xfer *xs; +{ + struct scsi_sense_data *s1,*s2; + struct ecb *ecb; + struct ahb_dma_seg *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; + int s; + if(scsi_debug & PRINTROUTINES) + printf("ahb_scsi_cmd "); + /***********************************************\ + * get a ecb (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("Already done?"); + xs->flags &= ~ITSDONE; + } + if(!(flags & INUSE)) + { + printf("Not in use?"); + xs->flags |= INUSE; + } + if (!(ecb = ahb_get_ecb(unit,flags))) + { + xs->error = XS_DRIVER_STUFFUP; + return(TRY_AGAIN_LATER); + } + +cheat = ecb; + if(ahb_debug & AHB_SHOWECBS) + printf("<start ecb(%x)>",ecb); + if(scsi_debug & SHOWCOMMANDS) + { + ahb_show_scsi_cmd(xs); + } + ecb->xs = xs; + /***********************************************\ + * If it's a reset, we need to do an 'immediate' * + * command, and store it's ccb for later * + * if there is already an immediate waiting, * + * then WE must wait * + \***********************************************/ + if(flags & SCSI_RESET) + { + ecb->flags |= ECB_IMMED; + if(ahb_data[unit].immed_ecb) + { + return(TRY_AGAIN_LATER); + } + ahb_data[unit].immed_ecb = ecb; + if (!(flags & SCSI_NOMASK)) + { + s = splbio(); + ahb_send_immed(unit,xs->targ,AHB_TARG_RESET); + ahb_add_timeout(ecb,xs->timeout); + splx(s); + return(SUCCESSFULLY_QUEUED); + } + else + { + ahb_send_immed(unit,xs->targ,AHB_TARG_RESET); + /***********************************************\ + * If we can't use interrupts, poll on completion* + \***********************************************/ + if(scsi_debug & TRACEINTERRUPTS) + printf("wait "); + if( ahb_poll(unit,xs->timeout)) + { + ahb_free_ecb(unit,ecb,flags); + xs->error = XS_TIMEOUT; + return(HAD_ERROR); + } + return(COMPLETE); + } + } + /***********************************************\ + * Put all the arguments for the xfer in the ecb * + \***********************************************/ + ecb->opcode = ECB_SCSI_OP; + ecb->opt1 = ECB_SES|ECB_DSB|ECB_ARS; + if(xs->datalen) + { + ecb->opt1 |= ECB_S_G; + } + ecb->opt2 = xs->lu | ECB_NRB; + ecb->cdblen = xs->cmdlen; + ecb->sense = KVTOPHYS(&(ecb->ecb_sense)); + ecb->senselen = sizeof(ecb->ecb_sense); + ecb->status = KVTOPHYS(&(ecb->ecb_status)); + + if(xs->datalen) + { /* should use S/G only if not zero length */ + ecb->data = KVTOPHYS(ecb->ahb_dma); + sg = ecb->ahb_dma ; + 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 < AHB_NSEG)) + { + sg->addr = (physaddr)iovp->iov_base; + xs->datalen += sg->len = iovp->iov_len; + if(scsi_debug & SHOWSCATGATH) + printf("(0x%x@0x%x)" + ,iovp->iov_len + ,iovp->iov_base); + sg++; + iovp++; + seg++; + datalen--; + } + } + else + { + /***********************************************\ + * Set up the scatter gather block * + \***********************************************/ + + if(scsi_debug & SHOWSCATGATH) + printf("%d @0x%x:- ",xs->datalen,xs->data); + datalen = xs->datalen; + thiskv = (int)xs->data; + thisphys = KVTOPHYS(thiskv); + + while ((datalen) && (seg < AHB_NSEG)) + { + bytes_this_seg = 0; + + /* put in the base address */ + sg->addr = thisphys; + + if(scsi_debug & SHOWSCATGATH) + printf("0x%x",thisphys); + + /* 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 * + \********************************************/ + if(scsi_debug & SHOWSCATGATH) + printf("(0x%x)",bytes_this_seg); + sg->len = bytes_this_seg; + sg++; + seg++; + } + } /*end of iov/kv decision */ + ecb->datalen = seg * sizeof(struct ahb_dma_seg); + if(scsi_debug & SHOWSCATGATH) + printf("\n"); + if (datalen) + { /* there's still data, must have run out of segs! */ + printf("ahb_scsi_cmd%d: more than %d DMA segs\n", + unit,AHB_NSEG); + xs->error = XS_DRIVER_STUFFUP; + ahb_free_ecb(unit,ecb,flags); + return(HAD_ERROR); + } + + } + else + { /* No data xfer, use non S/G values */ + ecb->data = (physaddr)0; + ecb->datalen = 0; + } + ecb->chain = (physaddr)0; + /***********************************************\ + * Put the scsi command in the ecb and start it * + \***********************************************/ + bcopy(xs->cmd, ecb->cdb, xs->cmdlen); + /***********************************************\ + * Usually return SUCCESSFULLY QUEUED * + \***********************************************/ + if (!(flags & SCSI_NOMASK)) + { + s = splbio(); + ahb_send_mbox(unit,OP_START_ECB,xs->targ,ecb); + ahb_add_timeout(ecb,xs->timeout); + splx(s); + if(scsi_debug & TRACEINTERRUPTS) + printf("cmd_sent "); + return(SUCCESSFULLY_QUEUED); + } + /***********************************************\ + * If we can't use interrupts, poll on completion* + \***********************************************/ + ahb_send_mbox(unit,OP_START_ECB,xs->targ,ecb); + if(scsi_debug & TRACEINTERRUPTS) + printf("cmd_wait "); + do + { + if(ahb_poll(unit,xs->timeout)) + { + if (!(xs->flags & SCSI_SILENT)) printf("cmd fail\n"); + ahb_send_mbox(unit,OP_ABORT_ECB,xs->targ,ecb); + if(ahb_poll(unit,2000)) + { + printf("abort failed in wait\n"); + ahb_free_ecb(unit,ecb,flags); + } + xs->error = XS_DRIVER_STUFFUP; + splx(s); + return(HAD_ERROR); + } + } while (!(xs->flags & ITSDONE));/* something (?) else finished */ + splx(s); +scsi_debug = 0;ahb_debug = 0; + if(xs->error) + { + return(HAD_ERROR); + } + return(COMPLETE); +} + +/* + * +----------+ +----------+ +----------+ + * ahb_soonest--->| later |--->| later|--->| later|--->0 + * | [Delta] | | [Delta] | | [Delta] | + * 0<---|sooner |<---|sooner |<---|sooner |<---ahb_latest + * +----------+ +----------+ +----------+ + * + * ahb_furtherest = sum(Delta[1..n]) + */ +ahb_add_timeout(ecb,time) +struct ecb *ecb; +int time; +{ + int timeprev; + struct ecb *prev; + int s = splbio(); + + if(prev = ahb_latest) /* yes, an assign */ + { + timeprev = ahb_furtherest; + } + else + { + timeprev = 0; + } + while(prev && (timeprev > time)) + { + timeprev -= prev->delta; + prev = prev->sooner; + } + if(prev) + { + ecb->delta = time - timeprev; + if( ecb->later = prev->later) /* yes an assign */ + { + ecb->later->sooner = ecb; + ecb->later->delta -= ecb->delta; + } + else + { + ahb_furtherest = time; + ahb_latest = ecb; + } + ecb->sooner = prev; + prev->later = ecb; + } + else + { + if( ecb->later = ahb_soonest) /* yes, an assign*/ + { + ecb->later->sooner = ecb; + ecb->later->delta -= time; + } + else + { + ahb_furtherest = time; + ahb_latest = ecb; + } + ecb->delta = time; + ecb->sooner = (struct ecb *)0; + ahb_soonest = ecb; + } + splx(s); +} + +ahb_remove_timeout(ecb) +struct ecb *ecb; +{ + int s = splbio(); + + if(ecb->sooner) + { + ecb->sooner->later = ecb->later; + } + else + { + ahb_soonest = ecb->later; + } + if(ecb->later) + { + ecb->later->sooner = ecb->sooner; + ecb->later->delta += ecb->delta; + } + else + { + ahb_latest = ecb->sooner; + ahb_furtherest -= ecb->delta; + } + ecb->sooner = ecb->later = (struct ecb *)0; + splx(s); +} + + +extern int hz; +#define ONETICK 500 /* milliseconds */ +#define SLEEPTIME ((hz * 1000) / ONETICK) +ahb_timeout(arg) +int arg; +{ + struct ecb *ecb; + int unit; + int s = splbio(); + + while( ecb = ahb_soonest ) + { + if(ecb->delta <= ONETICK) + /***********************************************\ + * It has timed out, we need to do some work * + \***********************************************/ + { + unit = ecb->xs->adapter; + printf("ahb%d:%d device timed out\n",unit + ,ecb->xs->targ); + if(ahb_debug & AHB_SHOWECBS) + ahb_print_active_ecb(); + + /***************************************\ + * Unlink it from the queue * + \***************************************/ + ahb_remove_timeout(ecb); + + /***************************************\ + * If it's immediate, don't try abort it * + \***************************************/ + if(ecb->flags & ECB_IMMED) + { + ecb->xs->retries = 0; /* I MEAN IT ! */ + ecb->flags |= ECB_IMMED_FAIL; + ahb_done(unit,ecb,FAIL); + continue; + } + /***************************************\ + * If it has been through before, then * + * a previous abort has failed, don't * + * try abort again * + \***************************************/ + if(ecb->flags == ECB_ABORTED) /* abort timed out */ + { + printf("AGAIN"); + ecb->xs->retries = 0; /* I MEAN IT ! */ + ecb->ecb_status.ha_status = HS_CMD_ABORTED_HOST; + ahb_done(unit,ecb,FAIL); + } + else /* abort the operation that has timed out */ + { + printf("\n"); + ahb_send_mbox(unit,OP_ABORT_ECB,ecb->xs->targ,ecb); + /* 2 secs for the abort */ + ahb_add_timeout(ecb,2000 + ONETICK); + ecb->flags = ECB_ABORTED; + } + } + else + /***********************************************\ + * It has not timed out, adjust and leave * + \***********************************************/ + { + ecb->delta -= ONETICK; + ahb_furtherest -= ONETICK; + break; + } + } + splx(s); + timeout(ahb_timeout,arg,SLEEPTIME); +} + +ahb_show_scsi_cmd(struct scsi_xfer *xs) +{ + u_char *b = (u_char *)xs->cmd; + int i = 0; + if(!(xs->flags & SCSI_RESET)) + { + printf("ahb%d:%d:%d-" + ,xs->adapter + ,xs->targ + ,xs->lu); + while(i < xs->cmdlen ) + { + if(i) printf(","); + printf("%x",b[i++]); + } + printf("-\n"); + } + else + { + printf("ahb%d:%d:%d-RESET-\n" + ,xs->adapter + ,xs->targ + ,xs->lu + ); + } +} +ahb_print_ecb(ecb) +struct ecb *ecb; +{ + printf("ecb:%x op:%x cmdlen:%d senlen:%d\n" + ,ecb + ,ecb->opcode + ,ecb->cdblen + ,ecb->senselen); + printf(" datlen:%d hstat:%x tstat:%x delta:%d flags:%x\n" + ,ecb->datalen + ,ecb->ecb_status.ha_status + ,ecb->ecb_status.targ_status + ,ecb->delta + ,ecb->flags); + ahb_show_scsi_cmd(ecb->xs); +} + +ahb_print_active_ecb() +{ + struct ecb *ecb; + ecb = ahb_soonest; + + while(ecb) + { + ahb_print_ecb(ecb); + ecb = ecb->later; + } + printf("Furtherest = %d\n",ahb_furtherest); +} |
