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Diffstat (limited to 'sys/i386/eisa/aha1742.c')
| -rw-r--r-- | sys/i386/eisa/aha1742.c | 1240 |
1 files changed, 1240 insertions, 0 deletions
diff --git a/sys/i386/eisa/aha1742.c b/sys/i386/eisa/aha1742.c new file mode 100644 index 0000000..1f770e2 --- /dev/null +++ b/sys/i386/eisa/aha1742.c @@ -0,0 +1,1240 @@ +/* + * 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. + * + * commenced: Sun Sep 27 18:14:01 PDT 1992 + * + * $Id: aha1742.c,v 1.18 1994/08/20 03:48:38 davidg Exp $ + */ + +#include <sys/types.h> + +#ifdef KERNEL /* don't laugh, it compiles as a program too.. look */ +#include "ahb.h" +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/malloc.h> +#include <sys/buf.h> +#include <sys/proc.h> +#include <sys/user.h> +#include <i386/include/pio.h> +#include <i386/isa/isa_device.h> +#endif /*KERNEL */ +#include <scsi/scsi_all.h> +#include <scsi/scsiconf.h> + +/* */ + +#ifdef KERNEL +# ifdef NetBSD +# ifdef DDB +int Debugger(); +# else /* DDB */ +#define Debugger() panic("should call debugger here (adaptec.c)") +# endif /* DDB */ +# else +#include "ddb.h" +#endif /* netbsd */ +#else /* KERNEL */ +#define NAHB 1 +#endif /* kernel */ + +typedef unsigned long int physaddr; +#include <sys/kernel.h> + +#define KVTOPHYS(x) vtophys(x) + +#define AHB_ECB_MAX 32 /* store up to 32ECBs at any one time */ + /* in aha1742 H/W ( Not MAX ? ) */ +#define ECB_HASH_SIZE 32 /* when we have a physical addr. for */ + /* a ecb and need to find the ecb in */ + /* space, look it up in the hash table */ +#define ECB_HASH_SHIFT 9 /* only hash on multiples of 512 */ +#define ECB_HASH(x) ((((long int)(x))>>ECB_HASH_SHIFT) % ECB_HASH_SIZE) + +#define AHB_NSEG 33 /* number of dma segments supported */ + +/* + * 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 */ + 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 *nexthash; + physaddr hashkey; /* physaddr of this struct */ +}; + +struct ahb_data { + int flags; +#define AHB_INIT 0x01; + int baseport; + struct ecb *ecbhash[ECB_HASH_SIZE]; + struct ecb *free_ecb; + int our_id; /* our scsi id */ + int vect; + struct ecb *immed_ecb; /* an outstanding immediete command */ + struct scsi_link sc_link; + int numecbs; +} *ahbdata[NAHB]; + +int ahbprobe(); +int ahbprobe1 __P((struct isa_device *dev)); +int ahb_attach(); +int ahb_init __P((int unit)); +int ahbintr(); +int32 ahb_scsi_cmd(); +timeout_t ahb_timeout; +void ahb_done(); +struct ecb *cheat; +void ahb_free_ecb(); +void ahbminphys(); +struct ecb *ahb_ecb_phys_kv(); +u_int32 ahb_adapter_info(); + +#define MAX_SLOTS 8 /* XXX should this be 16?? Need EISA spec */ +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 + +#ifdef KERNEL +struct isa_driver ahbdriver = +{ + ahbprobe, + ahb_attach, + "ahb" +}; + +struct scsi_adapter ahb_switch = +{ + ahb_scsi_cmd, + ahbminphys, + 0, + 0, + ahb_adapter_info, + "ahb", + { 0, 0 } +}; + +/* the below structure is so we have a default dev struct for our link struct */ +struct scsi_device ahb_dev = +{ + NULL, /* Use default error handler */ + NULL, /* have a queue, served by this */ + NULL, /* have no async handler */ + NULL, /* Use default 'done' routine */ + "ahb", + 0, + { 0, 0 } +}; + +#endif /*KERNEL */ + +#ifndef KERNEL +main() +{ + printf("ahb_data size is %d\n", sizeof(struct ahb_data)); + printf("ecb size is %d\n", sizeof(struct ecb)); +} + +#else /*KERNEL */ + +/* + * Function to send a command out through a mailbox + */ +void +ahb_send_mbox(int unit, int opcode, int target, struct ecb *ecb) +{ + int port = ahbdata[unit]->baseport; + int wait = 300; /* 3ms should be enough */ + int stport = port + G2STAT; + int s = splbio(); + + while (--wait) { + if ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) + == (G2STAT_MBOX_EMPTY)) + break; + DELAY(10); + } + if (wait == 0) { + printf("ahb%d: board not responding\n", unit); + Debugger("aha1742"); + } + 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 + */ +int +ahb_poll(int unit, int wait) +{ /* in msec */ + struct ahb_data *ahb = ahbdata[unit]; + int port = ahb->baseport; + int stport = port + G2STAT; + + retry: + while (--wait) { + if (inb(stport) & G2STAT_INT_PEND) + break; + DELAY(1000); + } if (wait == 0) { + printf("ahb%d: board not responding\n", unit); + return (EIO); + } + if (cheat != ahb_ecb_phys_kv(ahb, inl(port + MBOXIN0))) { + printf("discarding %x ", inl(port + MBOXIN0)); + outb(port + G2CNTRL, G2CNTRL_CLEAR_EISA_INT); + DELAY(50000); + goto retry; + } + /* don't know this will work */ + ahbintr(unit); + return (0); +} + +/* + * Function to send an immediate type command to the adapter + */ +void +ahb_send_immed(int unit, int target, u_long cmd) +{ + int port = ahbdata[unit]->baseport; + int s = splbio(); + int stport = port + G2STAT; + int wait = 100; /* 1 ms enough? */ + + while (--wait) { + if ((inb(stport) & (G2STAT_BUSY | G2STAT_MBOX_EMPTY)) + == (G2STAT_MBOX_EMPTY)) + break; + DELAY(10); + } if (wait == 0) { + printf("ahb%d: board not responding\n", unit); + Debugger("aha1742"); + } + 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. + */ +int +ahbprobe(dev) + struct isa_device *dev; +{ + int port; + u_char byte1, byte2, byte3; + + ahb_slot++; + while (ahb_slot <= MAX_SLOTS) { + 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->id_iobase = 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_device structure from + * autoconf.c. + */ +int +ahbprobe1(dev) + struct isa_device *dev; +{ + /* + * find unit and check we have that many defined + */ + int unit = ahb_unit; + struct ahb_data *ahb; + + if (unit >= NAHB) { + printf("ahb: unit number (%d) too high\n", unit); + return 0; + } + dev->id_unit = unit; + + /* + * Allocate a storage area for us + */ + if (ahbdata[unit]) { + printf("ahb%d: memory already allocated\n", unit); + return 0; + } + ahb = malloc(sizeof(struct ahb_data), M_TEMP, M_NOWAIT); + if (!ahb) { + printf("ahb%d: cannot malloc!\n", unit); + return 0; + } + bzero(ahb, sizeof(struct ahb_data)); + ahbdata[unit] = ahb; + ahb->baseport = dev->id_iobase; + /* + * Try initialise a unit at this location + * sets up dma and bus speed, loads ahb->vect + */ + if (ahb_init(unit) != 0) { + ahbdata[unit] = NULL; + free(ahb, M_TEMP); + return (0); + } + /* + * If it's there, put in it's interrupt vectors + */ + dev->id_irq = (1 << ahb->vect); + dev->id_drq = -1; /* use EISA dma */ + + ahb_unit++; + return 0x1000; +} + +/* + * Attach all the sub-devices we can find + */ +int +ahb_attach(dev) + struct isa_device *dev; +{ +#ifdef NetBSD + int unit = dev->id_masunit; +#else + int unit = dev->id_unit; +#endif + struct ahb_data *ahb = ahbdata[unit]; + + /* + * fill in the prototype scsi_link. + */ + ahb->sc_link.adapter_unit = unit; + ahb->sc_link.adapter_targ = ahb->our_id; + ahb->sc_link.adapter = &ahb_switch; + ahb->sc_link.device = &ahb_dev; + + /* + * ask the adapter what subunits are present + */ + scsi_attachdevs(&(ahb->sc_link)); + + return 1; +} + +/* + * Return some information to the caller about + * the adapter and it's capabilities + */ +u_int32 +ahb_adapter_info(unit) + int unit; +{ + return (2); /* 2 outstanding requests at a time per device */ +} + +/* + * Catch an interrupt from the adaptor + */ +int +ahbintr(unit) + int unit; +{ + struct ecb *ecb; + unsigned char stat; + u_char ahbstat; + int target; + long int mboxval; + struct ahb_data *ahb = ahbdata[unit]; + + int port = ahb->baseport; + +#ifdef AHBDEBUG + printf("ahbintr "); +#endif /*AHBDEBUG */ + + 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); +#ifdef AHBDEBUG + printf("status = 0x%x ", stat); +#endif /*AHBDEBUG */ + /* + * Process the completed operation + */ + + if (stat == AHB_ECB_OK) { /* common case is fast */ + ecb = ahb_ecb_phys_kv(ahb, mboxval); + } else { + switch (stat) { + case AHB_IMMED_OK: + ecb = ahb->immed_ecb; + ahb->immed_ecb = 0; + break; + case AHB_IMMED_ERR: + ecb = ahb->immed_ecb; + ecb->flags |= ECB_IMMED_FAIL; + ahb->immed_ecb = 0; + break; + case AHB_ASN: /* for target mode */ + printf("ahb%d: Unexpected ASN interrupt(%x)\n", + unit, mboxval); + ecb = 0; + break; + case AHB_HW_ERR: + printf("ahb%d: Hardware error interrupt(%x)\n", + unit, mboxval); + ecb = 0; + break; + case AHB_ECB_RECOVERED: + ecb = ahb_ecb_phys_kv(ahb, mboxval); + break; + case AHB_ECB_ERR: + ecb = ahb_ecb_phys_kv(ahb, mboxval); + break; + default: + printf(" Unknown return from ahb%d(%x)\n", unit, ahbstat); + ecb = 0; + } + } if (ecb) { +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWCMDS) { + show_scsi_cmd(ecb->xs); + } + if ((ahb_debug & AHB_SHOWECBS) && ecb) + printf("<int ecb(%x)>", ecb); +#endif /*AHBDEBUG */ + untimeout(ahb_timeout, (caddr_t)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. + */ +void +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; + + SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_done\n")); + /* + * 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 */ +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWMISC) { + printf("timeout reported back\n"); + } +#endif /*AHBDEBUG */ + xs->error = XS_TIMEOUT; + break; + default: /* Other scsi protocol messes */ + xs->error = XS_DRIVER_STUFFUP; +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWMISC) { + printf("unexpected ha_status: %x\n", + stat->ha_status); + } +#endif /*AHBDEBUG */ + } + } 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: +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWMISC) { + printf("unexpected targ_status: %x\n", + stat->targ_status); + } +#endif /*AHBDEBUG */ + xs->error = XS_DRIVER_STUFFUP; + } + } + } +done: xs->flags |= ITSDONE; + ahb_free_ecb(unit, ecb, xs->flags); + scsi_done(xs); +} + +/* + * A ecb (and hence a mbx-out is put onto the + * free list. + */ +void +ahb_free_ecb(unit, ecb, flags) + int unit, flags; + struct ecb *ecb; +{ + unsigned int opri = 0; + struct ahb_data *ahb = ahbdata[unit]; + + if (!(flags & SCSI_NOMASK)) + opri = splbio(); + + ecb->next = ahb->free_ecb; + ahb->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((caddr_t)&ahb->free_ecb); + } + if (!(flags & SCSI_NOMASK)) + splx(opri); +} + +/* + * Get a free ecb + * If there are none, see if we can allocate a + * new one. If so, put it in the hash table too + * otherwise either return an error or sleep + */ +struct ecb * +ahb_get_ecb(unit, flags) + int unit, flags; +{ + struct ahb_data *ahb = ahbdata[unit]; + unsigned opri = 0; + struct ecb *ecbp; + int hashnum; + + if (!(flags & SCSI_NOMASK)) + opri = splbio(); + /* + * If we can and have to, sleep waiting for one to come free + * but only if we can't allocate a new one. + */ + while (!(ecbp = ahb->free_ecb)) { + if (ahb->numecbs < AHB_ECB_MAX) { + ecbp = (struct ecb *) malloc(sizeof(struct ecb), + M_TEMP, + M_NOWAIT); + if (ecbp) { + bzero(ecbp, sizeof(struct ecb)); + ahb->numecbs++; + ecbp->flags = ECB_ACTIVE; + /* + * put in the phystokv hash table + * Never gets taken out. + */ + ecbp->hashkey = KVTOPHYS(ecbp); + hashnum = ECB_HASH(ecbp->hashkey); + ecbp->nexthash = ahb->ecbhash[hashnum]; + ahb->ecbhash[hashnum] = ecbp; + } else { + printf("ahb%d: Can't malloc ECB\n", unit); + } goto gottit; + } else { + if (!(flags & SCSI_NOSLEEP)) { + tsleep((caddr_t)&ahb->free_ecb, PRIBIO, + "ahbecb", 0); + } + } + } if (ecbp) { + /* Get ECB from from free list */ + ahb->free_ecb = ecbp->next; + ecbp->flags = ECB_ACTIVE; + } +gottit: if (!(flags & SCSI_NOMASK)) + splx(opri); + + return (ecbp); +} + +/* + * given a physical address, find the ecb that + * it corresponds to: + */ +struct ecb * +ahb_ecb_phys_kv(ahb, ecb_phys) + struct ahb_data *ahb; + physaddr ecb_phys; +{ + int hashnum = ECB_HASH(ecb_phys); + struct ecb *ecbp = ahb->ecbhash[hashnum]; + + while (ecbp) { + if (ecbp->hashkey == ecb_phys) + break; + ecbp = ecbp->nexthash; + } + return ecbp; +} + +/* + * Start the board, ready for normal operation + */ +int +ahb_init(unit) + int unit; +{ + struct ahb_data *ahb = ahbdata[unit]; + int port = ahb->baseport; + int intdef; + int wait = 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); + DELAY(1000); + outb(port + G2CNTRL, 0); + DELAY(10000); + while (--wait) { + if ((inb(stport) & G2STAT_BUSY) == 0) + break; + DELAY(1000); + } if (wait == 0) { +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWMISC) + printf("ahb_init: No answer from aha1742 board\n"); +#endif /*AHBDEBUG */ + 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); + DELAY(10000); + } + 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 + */ + printf("ahb%d: reading board settings, ", unit); + + intdef = inb(port + INTDEF); + switch (intdef & 0x07) { + case INT9: + ahb->vect = 9; + break; + case INT10: + ahb->vect = 10; + break; + case INT11: + ahb->vect = 11; + break; + case INT12: + ahb->vect = 12; + break; + case INT14: + ahb->vect = 14; + break; + case INT15: + ahb->vect = 15; + break; + default: + printf("illegal int setting\n"); + return (EIO); + } + printf("int=%d\n", ahb->vect); + + outb(port + INTDEF, (intdef | INTEN)); /* make sure we can interrupt */ + + /* who are we on the scsi bus? */ + ahb->our_id = (inb(port + SCSIDEF) & HSCSIID); + + /* + * Note that we are going and return (to probe) + */ + ahb->flags |= AHB_INIT; + return (0); +} + +#ifndef min +#define min(x,y) (x < y ? x : y) +#endif /* min */ + +void +ahbminphys(bp) + struct buf *bp; +{ + 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 + */ +int32 +ahb_scsi_cmd(xs) + struct scsi_xfer *xs; +{ + struct ecb *ecb; + struct ahb_dma_seg *sg; + int seg; /* scatter gather seg being worked on */ + int thiskv; + physaddr thisphys, nextphys; + int unit = xs->sc_link->adapter_unit; + int bytes_this_seg, bytes_this_page, datalen, flags; + struct ahb_data *ahb = ahbdata[unit]; + int s; + + SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahb_scsi_cmd\n")); + /* + * 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("ahb%d: Already done?", unit); + xs->flags &= ~ITSDONE; + } + if (!(flags & INUSE)) { + printf("ahb%d: Not in use?", unit); + xs->flags |= INUSE; + } + if (!(ecb = ahb_get_ecb(unit, flags))) { + xs->error = XS_DRIVER_STUFFUP; + return (TRY_AGAIN_LATER); + } + cheat = ecb; + SC_DEBUG(xs->sc_link, SDEV_DB3, ("start ecb(%x)\n", ecb)); + ecb->xs = xs; + /* + * If it's a reset, we need to do an 'immediate' + * command, and store it's ecb for later + * if there is already an immediate waiting, + * then WE must wait + */ + if (flags & SCSI_RESET) { + ecb->flags |= ECB_IMMED; + if (ahb->immed_ecb) { + return (TRY_AGAIN_LATER); + } + ahb->immed_ecb = ecb; + if (!(flags & SCSI_NOMASK)) { + s = splbio(); + ahb_send_immed(unit, xs->sc_link->target, AHB_TARG_RESET); + timeout(ahb_timeout, (caddr_t)ecb, (xs->timeout * hz) / 1000); + splx(s); + return (SUCCESSFULLY_QUEUED); + } else { + ahb_send_immed(unit, xs->sc_link->target, AHB_TARG_RESET); + /* + * If we can't use interrupts, poll on completion + */ + SC_DEBUG(xs->sc_link, SDEV_DB3, ("wait\n")); + 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->sc_link->lun | 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; +#ifdef TFS + 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; + SC_DEBUGN(xs->sc_link, SDEV_DB4, + ("(0x%x@0x%x)", iovp->iov_len + ,iovp->iov_base)); + sg++; + iovp++; + seg++; + datalen--; + } + } + else +#endif /*TFS */ + { + /* + * Set up the scatter gather block + */ + + SC_DEBUG(xs->sc_link, SDEV_DB4, + ("%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; + + SC_DEBUGN(xs->sc_link, SDEV_DB4, ("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 + */ + SC_DEBUGN(xs->sc_link, SDEV_DB4, + ("(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); + SC_DEBUGN(xs->sc_link, SDEV_DB4, ("\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->sc_link->target, ecb); + timeout(ahb_timeout, (caddr_t)ecb, (xs->timeout * hz) / 1000); + splx(s); + SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_sent\n")); + return (SUCCESSFULLY_QUEUED); + } + /* + * If we can't use interrupts, poll on completion + */ + ahb_send_mbox(unit, OP_START_ECB, xs->sc_link->target, ecb); + SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_wait\n")); + do { + if (ahb_poll(unit, xs->timeout)) { + if (!(xs->flags & SCSI_SILENT)) + printf("cmd fail\n"); + ahb_send_mbox(unit, OP_ABORT_ECB, xs->sc_link->target, ecb); + if (ahb_poll(unit, 2000)) { + printf("abort failed in wait\n"); + ahb_free_ecb(unit, ecb, flags); + } + xs->error = XS_DRIVER_STUFFUP; + return (HAD_ERROR); + } + } while (!(xs->flags & ITSDONE)); /* something (?) else finished */ + if (xs->error) { + return (HAD_ERROR); + } + return (COMPLETE); +} + +void +ahb_timeout(void *arg1) +{ + struct ecb * ecb = (struct ecb *)arg1; + int unit; + struct ahb_data *ahb; + int s = splbio(); + + unit = ecb->xs->sc_link->adapter_unit; + ahb = ahbdata[unit]; + printf("ahb%d:%d:%d (%s%d) timed out ", unit + ,ecb->xs->sc_link->target + ,ecb->xs->sc_link->lun + ,ecb->xs->sc_link->device->name + ,ecb->xs->sc_link->dev_unit); + +#ifdef AHBDEBUG + if (ahb_debug & AHB_SHOWECBS) + ahb_print_active_ecb(unit); +#endif /*AHBDEBUG */ + + /* + * 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); + splx(s); + return; + } + /* + * 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->sc_link->target, ecb); + /* 2 secs for the abort */ + timeout(ahb_timeout, (caddr_t)ecb, 2 * hz); + ecb->flags = ECB_ABORTED; + } + splx(s); +} + +#ifdef AHBDEBUG +void +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 flags:%x\n" + ,ecb->datalen + ,ecb->ecb_status.ha_status + ,ecb->ecb_status.targ_status + ,ecb->flags); + show_scsi_cmd(ecb->xs); +} + +void +ahb_print_active_ecb(int unit) +{ + struct ahb_data *ahb = ahbdata[unit]; + struct ecb *ecb; + int i = 0; + + while (i < ECB_HASH_SIZE) { + ecb = ahb->ecbhash[i]; + while (ecb) { + if (ecb->flags != ECB_FREE) { + ahb_print_ecb(ecb); + } + ecb = ecb->nexthash; + } i++; + } +} +#endif /*AHBDEBUG */ +#endif /*KERNEL */ |
