/* * Generic driver for the aic7xxx based adaptec SCSI controllers * Copyright (c) 1994, 1995 Justin T. Gibbs. * All rights reserved. * * Product specific probe and attach routines can be found in: * i386/isa/aic7770.c 27/284X and aic7770 motherboard controllers * /pci/aic7870.c 3940, 2940, aic7870 and aic7850 controllers * * Portions of this driver are based on the FreeBSD 1742 Driver: * * 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: aic7xxx.c,v 1.46 1995/11/07 05:32:47 gibbs Exp $ */ /* * TODO: * Implement Target Mode * */ #include #include #include #include #include #include #include #include #include #include #include #include #define PAGESIZ 4096 #define MAX_TAGS 4; #include #define KVTOPHYS(x) vtophys(x) #define MIN(a,b) ((a < b) ? a : b) #define ALL_TARGETS -1 struct ahc_data *ahcdata[NAHC]; static void ahc_loadseq __P((u_long iobase)); static int32 ahc_scsi_cmd(); static timeout_t ahc_timeout; static void ahc_done __P((int unit, struct scb *scbp)); static struct scb *ahc_get_scb __P((int unit, int flags)); static void ahc_free_scb(); static void ahc_scb_timeout __P((int unit, struct ahc_data *ahc, struct scb *scb)); static u_char ahc_abort_wscb __P((int unit, struct scb *scbp, u_char prev, u_long iobase, u_char timedout_scb, u_int32 xs_error)); static int ahc_match_scb __P((struct scb *scb, int target, char channel)); static int ahc_reset_device __P((int unit, struct ahc_data *ahc, int target, char channel, u_char timedout_scb, u_int32 xs_error)); static void ahc_reset_current_bus __P((u_long iobase)); static int ahc_reset_channel __P((int unit, struct ahc_data *ahc, char channel, u_char timedout_scb, u_int32 xs_error)); static void ahcminphys(); static void ahc_unbusy_target __P((int target, char channel, u_long iobase)); struct scb *ahc_scb_phys_kv(); static int ahc_poll __P((int unit, int wait)); static u_int32 ahc_adapter_info(); u_long ahc_unit = 0; static int ahc_debug = AHC_SHOWABORTS; /**** bit definitions for SCSIDEF ****/ #define HSCSIID 0x07 /* our SCSI ID */ #define HWSCSIID 0x0f /* our SCSI ID if Wide Bus */ typedef enum { list_head, list_second, list_tail }insert_t; static struct scsi_adapter ahc_switch = { ahc_scsi_cmd, ahcminphys, 0, 0, ahc_adapter_info, "ahc", { 0, 0 } }; /* the below structure is so we have a default dev struct for our link struct */ static struct scsi_device ahc_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "ahc", 0, { 0, 0 } }; /* * Define the format of the SEEPROM registers (16 bits). * */ struct seeprom_config { /* * SCSI ID Configuration Flags */ #define CFXFER 0x0007 /* synchronous transfer rate */ #define CFSYNCH 0x0008 /* enable synchronous transfer */ #define CFDISC 0x0010 /* enable disconnection */ #define CFWIDEB 0x0020 /* wide bus device */ /* UNUSED 0x00C0 */ #define CFSTART 0x0100 /* send start unit SCSI command */ #define CFINCBIOS 0x0200 /* include in BIOS scan */ #define CFRNFOUND 0x0400 /* report even if not found */ /* UNUSED 0xf800 */ unsigned short device_flags[16]; /* words 0-15 */ /* * BIOS Control Bits */ #define CFSUPREM 0x0001 /* support all removeable drives */ #define CFSUPREMB 0x0002 /* support removeable drives for boot only */ #define CFBIOSEN 0x0004 /* BIOS enabled */ /* UNUSED 0x0008 */ #define CFSM2DRV 0x0010 /* support more than two drives */ /* UNUSED 0x0060 */ #define CFEXTEND 0x0080 /* extended translation enabled */ /* UNUSED 0xff00 */ unsigned short bios_control; /* word 16 */ /* * Host Adapter Control Bits */ /* UNUSED 0x0001 */ #define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */ #define CFSTERM 0x0004 /* SCSI low byte termination (non-wide cards) */ #define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */ #define CFSPARITY 0x0010 /* SCSI parity */ /* UNUSED 0x0020 */ #define CFRESETB 0x0040 /* reset SCSI bus at IC initialization */ /* UNUSED 0xff80 */ unsigned short adapter_control; /* word 17 */ /* * Bus Release, Host Adapter ID */ #define CFSCSIID 0x000f /* host adapter SCSI ID */ /* UNUSED 0x00f0 */ #define CFBRTIME 0xff00 /* bus release time */ unsigned short brtime_id; /* word 18 */ /* * Maximum targets */ #define CFMAXTARG 0x00ff /* maximum targets */ /* UNUSED 0xff00 */ unsigned short max_targets; /* word 19 */ unsigned short res_1[11]; /* words 20-30 */ unsigned short checksum; /* word 31 */ }; /* * Since the sequencer can disable pausing in a critical section, we * must loop until it actually stops. * XXX Should add a timeout in here?? */ #define PAUSE_SEQUENCER(ahc) \ outb(HCNTRL + ahc->baseport, ahc->pause); \ \ while ((inb(HCNTRL + ahc->baseport) & PAUSE) == 0) \ ; #define UNPAUSE_SEQUENCER(ahc) \ outb( HCNTRL + ahc->baseport, ahc->unpause ) /* * Restart the sequencer program from address zero */ #define RESTART_SEQUENCER(ahc) \ do { \ outb( SEQCTL + ahc->baseport, SEQRESET|FASTMODE ); \ } while (inb(SEQADDR0 + ahc->baseport) != 0 && \ inb(SEQADDR1 + ahc->baseport != 0)); \ \ UNPAUSE_SEQUENCER(ahc); #ifdef AHC_DEBUG static void ahc_print_scb(scb) struct scb *scb; { printf("scb:%p control:0x%x tcl:0x%x cmdlen:%d cmdpointer:0x%lx\n" ,scb ,scb->control ,scb->target_channel_lun ,scb->cmdlen ,scb->cmdpointer ); printf(" datlen:%d data:0x%lx res:0x%x segs:0x%x segp:0x%lx\n" ,scb->datalen[2] << 16 | scb->datalen[1] << 8 | scb->datalen[0] ,scb->data ,scb->RESERVED[1] << 8 | scb->RESERVED[0] ,scb->SG_segment_count ,scb->SG_list_pointer); printf(" sg_addr:%lx sg_len:%ld\n" ,scb->ahc_dma[0].addr ,scb->ahc_dma[0].len); printf(" size:%d\n" ,(int)&(scb->next) - (int)scb); } static void ahc_print_active_scb(ahc) struct ahc_data *ahc; { int cur_scb_offset; u_long iobase = ahc->baseport; PAUSE_SEQUENCER(ahc); cur_scb_offset = inb(SCBPTR + iobase); UNPAUSE_SEQUENCER(ahc); ahc_print_scb(ahc->scbarray[cur_scb_offset]); } #endif #define PARERR 0x08 #define ILLOPCODE 0x04 #define ILLSADDR 0x02 #define ILLHADDR 0x01 static struct { u_char errno; char *errmesg; } hard_error[] = { { ILLHADDR, "Illegal Host Access" }, { ILLSADDR, "Illegal Sequencer Address referrenced" }, { ILLOPCODE, "Illegal Opcode in sequencer program" }, { PARERR, "Sequencer Ram Parity Error" } }; /* * Valid SCSIRATE values. (p. 3-17) * Provides a mapping of tranfer periods in ns to the proper value to * stick in the scsiscfr reg to use that transfer rate. */ static struct { short sxfr; /* Rates in Ultra mode have bit 8 of sxfr set */ #define ULTRA_SXFR 0x100 short period; /* in ns */ char *rate; } ahc_syncrates[] = { { 0x100, 50, "20.0" }, { 0x110, 62, "16.0" }, { 0x120, 75, "13.4" }, { 0x140, 100, "10.0" }, { 0x000, 100, "10.0" }, { 0x010, 125, "8.0" }, { 0x020, 150, "6.67" }, { 0x030, 175, "5.7" }, { 0x040, 200, "5.0" }, { 0x050, 225, "4.4" }, { 0x060, 250, "4.0" }, { 0x070, 275, "3.6" } }; static int ahc_num_syncrates = sizeof(ahc_syncrates) / sizeof(ahc_syncrates[0]); /* * Allocate a controller structures for a new device and initialize it. * ahc_reset should be called before now since we assume that the card * is paused. * * Sticking the ahc structure into the ahcdata array is an artifact of the * need to index by unit. As soon as the upper level scsi code passes * pointers instead of units down to us, this will go away. */ struct ahc_data * ahc_alloc(unit, iobase, type, flags) int unit; u_long iobase; ahc_type type; ahc_flag flags; { /* * find unit and check we have that many defined */ struct ahc_data *ahc; if (unit >= NAHC) { printf("ahc: unit number (%d) too high\n", unit); return 0; } /* * Allocate a storage area for us */ if (ahcdata[unit]) { printf("ahc%d: memory already allocated\n", unit); return NULL; } ahc = malloc(sizeof(struct ahc_data), M_TEMP, M_NOWAIT); if (!ahc) { printf("ahc%d: cannot malloc!\n", unit); return NULL; } bzero(ahc, sizeof(struct ahc_data)); ahcdata[unit] = ahc; ahc->unit = unit; ahc->baseport = iobase; ahc->type = type; ahc->flags = flags; ahc->unpause = (inb(HCNTRL + iobase) & IRQMS) | INTEN; ahc->pause = ahc->unpause | PAUSE; return (ahc); } void ahc_free(ahc) struct ahc_data *ahc; { ahcdata[ahc->unit] = NULL; free(ahc, M_DEVBUF); return; } void ahc_reset(iobase) u_long iobase; { u_char hcntrl; int wait; /* Retain the IRQ type accross the chip reset */ hcntrl = (inb(HCNTRL + iobase) & IRQMS) | INTEN; outb(HCNTRL + iobase, CHIPRST | PAUSE); /* * Ensure that the reset has finished */ wait = 1000; while (wait--) { DELAY(1000); if(!(inb(HCNTRL + iobase) & CHIPRST)) break; } if(wait == 0) { printf("ahc at 0x%lx: WARNING - Failed chip reset! " "Trying to initialize anyway.\n", iobase); } outb(HCNTRL + iobase, hcntrl | PAUSE); } /* * Look up the valid period to SCSIRATE conversion in our table. */ static void ahc_scsirate(scsirate, period, offset, unit, target ) u_char *scsirate; u_char period, offset; int unit, target; { int i; struct ahc_data *ahc = ahcdata[unit]; for (i = 0; i < ahc_num_syncrates; i++) { if ((ahc_syncrates[i].period - period) >= 0) { /* * Watch out for Ultra speeds when ultra is not * enabled and vice-versa. */ if (ahc->type & AHC_ULTRA) { if (!(ahc_syncrates[i].sxfr & ULTRA_SXFR)) { printf("ahc%d: target %d requests " "%sMHz transfers, but adapter " "in Ultra mode can only sync at " "10MHz or above\n", unit, target, ahc_syncrates[i].rate); break; /* Use Async */ } } else { if (ahc_syncrates[i].sxfr & ULTRA_SXFR) { /* * This should only happen if the * drive is the first to negotiate * and chooses a high rate. We'll * just move down the table util * we hit a non ultra speed. */ continue; } } *scsirate = (ahc_syncrates[i].sxfr) | (offset & 0x0f); if(bootverbose) { printf("ahc%d: target %d synchronous at %sMHz," " offset = 0x%x\n", unit, target, ahc_syncrates[i].rate, offset ); } return; } } /* Default to asyncronous transfers. Also reject this SDTR request. */ *scsirate = 0; if(bootverbose) { printf("ahc%d: target %d using asyncronous transfers\n", unit, target ); } } /* * Attach all the sub-devices we can find */ int ahc_attach(unit) int unit; { struct ahc_data *ahc = ahcdata[unit]; struct scsibus_data *scbus; /* * fill in the prototype scsi_link. */ ahc->sc_link.adapter_unit = unit; ahc->sc_link.adapter_targ = ahc->our_id; ahc->sc_link.adapter = &ahc_switch; ahc->sc_link.opennings = 2; ahc->sc_link.device = &ahc_dev; ahc->sc_link.flags = DEBUGLEVEL; ahc->sc_link.fordriver = 0; /* * Prepare the scsibus_data area for the upperlevel * scsi code. */ scbus = scsi_alloc_bus(); if(!scbus) return 0; scbus->adapter_link = &ahc->sc_link; if(ahc->type & AHC_WIDE) scbus->maxtarg = 15; /* * ask the adapter what subunits are present */ if(bootverbose) printf("ahc%d: Probing channel A\n", unit); scsi_attachdevs(scbus); scbus = NULL; /* Upper-level SCSI code owns this now */ if(ahc->type & AHC_TWIN) { /* Configure the second scsi bus */ ahc->sc_link_b = ahc->sc_link; ahc->sc_link_b.adapter_targ = ahc->our_id_b; ahc->sc_link_b.adapter_bus = 1; ahc->sc_link_b.fordriver = (void *)SELBUSB; scbus = scsi_alloc_bus(); if(!scbus) return 0; scbus->adapter_link = &ahc->sc_link_b; if(ahc->type & AHC_WIDE) scbus->maxtarg = 15; if(bootverbose) printf("ahc%d: Probing Channel B\n", unit); scsi_attachdevs(scbus); scbus = NULL; /* Upper-level SCSI code owns this now */ } return 1; } static void ahc_send_scb( ahc, scb ) struct ahc_data *ahc; struct scb *scb; { u_long iobase = ahc->baseport; PAUSE_SEQUENCER(ahc); outb(QINFIFO + iobase, scb->position); UNPAUSE_SEQUENCER(ahc); } static void ahc_getscb(iobase, scb) u_long iobase; struct scb *scb; { outb(SCBCNT + iobase, 0x80); /* SCBAUTO */ insb(SCBARRAY + iobase, scb, SCB_UP_SIZE); outb(SCBCNT + iobase, 0); } /* * Add this SCB to the "waiting for selection" list. */ static void ahc_add_waiting_scb (iobase, scb, where) u_long iobase; struct scb *scb; insert_t where; { u_char head, tail; u_char curscb; curscb = inb(SCBPTR + iobase); head = inb(WAITING_SCBH + iobase); tail = inb(WAITING_SCBT + iobase); if(head == SCB_LIST_NULL) { /* List was empty */ head = scb->position; tail = SCB_LIST_NULL; } else if (where == list_head) { outb(SCBPTR+iobase, scb->position); outb(SCBARRAY+iobase+30, head); head = scb->position; } else if(tail == SCB_LIST_NULL) { /* List had one element */ tail = scb->position; outb(SCBPTR+iobase,head); outb(SCBARRAY+iobase+30, tail); } else if(where == list_second) { u_char third_scb; outb(SCBPTR+iobase, head); third_scb = inb(SCBARRAY+iobase+30); outb(SCBARRAY+iobase+30,scb->position); outb(SCBPTR+iobase, scb->position); outb(SCBARRAY+iobase+30,third_scb); } else { outb(SCBPTR+iobase,tail); tail = scb->position; outb(SCBARRAY+iobase+30, tail); } outb(WAITING_SCBH + iobase, head); outb(WAITING_SCBT + iobase, tail); outb(SCBPTR + iobase, curscb); } /* * Catch an interrupt from the adaptor */ int ahcintr(arg) void *arg; { int intstat; int unit; u_char status; u_long iobase; struct scb *scb = NULL; struct scsi_xfer *xs = NULL; struct ahc_data *ahc = (struct ahc_data *)arg; unit = ahc->unit; iobase = ahc->baseport; intstat = inb(INTSTAT + iobase); /* * Is this interrupt for me? or for * someone who is sharing my interrupt */ if (!(intstat & INT_PEND)) return 0; if (intstat & BRKADRINT) { /* We upset the sequencer :-( */ /* Lookup the error message */ int i, error = inb(ERROR + iobase); int num_errors = sizeof(hard_error)/sizeof(hard_error[0]); for(i = 0; error != 1 && i < num_errors; i++) error >>= 1; panic("ahc%d: brkadrint, %s at seqaddr = 0x%x\n", unit, hard_error[i].errmesg, (inb(SEQADDR1 + iobase) << 8) | inb(SEQADDR0 + iobase)); } if (intstat & SEQINT) { u_short targ_mask; u_char target = (inb(SCSIID + iobase) >> 4) & 0x0f; u_char scratch_offset = target; char channel = inb(SBLKCTL + iobase) & SELBUSB ? 'B': 'A'; if (channel == 'B') scratch_offset += 8; targ_mask = (0x01 << scratch_offset); switch (intstat & SEQINT_MASK) { case BAD_PHASE: panic("ahc%d:%c:%d: unknown scsi bus phase. " "Attempting to continue\n", unit, channel, target); break; case SEND_REJECT: { u_char rejbyte = inb(HA_REJBYTE + iobase); if(( rejbyte & 0xf0) == 0x20) { /* Tagged Message */ printf("\nahc%d:%c:%d: Tagged message " "rejected. Disabling tagged " "commands for this target.\n", unit, channel, target); ahc->tagenable &= ~targ_mask; } else printf("ahc%d:%c:%d: Warning - message " "rejected by target: 0x%x\n", unit, channel, target, rejbyte); break; } case NO_IDENT: panic("ahc%d:%c:%d: Target did not send an IDENTIFY " "message. SAVED_TCL == 0x%x\n", unit, channel, target, inb(SAVED_TCL + iobase)); break; case NO_MATCH: { printf("ahc%d:%c:%d: no active SCB for " "reconnecting target - " "issuing ABORT\n", unit, channel, target); printf("SAVED_TCL == 0x%x\n", inb(SAVED_TCL + iobase)); ahc_unbusy_target(target, channel, iobase); outb(SCBARRAY + iobase, SCB_NEEDDMA); outb(CLRSINT1 + iobase, CLRSELTIMEO); RESTART_SEQUENCER(ahc); break; } case MSG_SDTR: { u_char period, offset, rate; u_char targ_scratch; u_char maxoffset; /* * Help the sequencer to translate the * negotiated transfer rate. Transfer is * 1/4 the period in ns as is returned by * the sync negotiation message. So, we must * multiply by four */ period = inb(HA_ARG_1 + iobase) << 2; offset = inb(ACCUM + iobase); targ_scratch = inb(HA_TARG_SCRATCH + iobase + scratch_offset); if(targ_scratch & WIDEXFER) maxoffset = 0x08; else maxoffset = 0x0f; ahc_scsirate(&rate, period, MIN(offset,maxoffset), unit, target); /* Preserve the WideXfer flag */ targ_scratch = rate | (targ_scratch & WIDEXFER); outb(HA_TARG_SCRATCH + iobase + scratch_offset, targ_scratch); outb(SCSIRATE + iobase, targ_scratch); if( (targ_scratch & 0x0f) == 0 ) { /* * The requested rate was so low * that asyncronous transfers are * faster (not to mention the * controller won't support them), * so we issue a message reject to * ensure we go to asyncronous * transfers. */ outb(HA_RETURN_1 + iobase, SEND_REJ); } /* See if we initiated Sync Negotiation */ else if(ahc->sdtrpending & targ_mask) { /* * Don't send an SDTR back to * the target */ outb(HA_RETURN_1 + iobase, 0); } else{ /* * Send our own SDTR in reply */ #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWMISC) printf("Sending SDTR!!\n"); #endif outb(HA_RETURN_1 + iobase, SEND_SDTR); } /* * Negate the flags */ ahc->needsdtr &= ~targ_mask; ahc->sdtrpending &= ~targ_mask; break; } case MSG_WDTR: { u_char scratch, bus_width; bus_width = inb(ACCUM + iobase); scratch = inb(HA_TARG_SCRATCH + iobase + scratch_offset); if(ahc->wdtrpending & targ_mask) { /* * Don't send a WDTR back to the * target, since we asked first. */ outb(HA_RETURN_1 + iobase, 0); switch(bus_width) { case BUS_8_BIT: scratch &= 0x7f; break; case BUS_16_BIT: if(bootverbose) printf("ahc%d: target " "%d using 16Bit " "transfers\n", unit, target); scratch |= 0x80; break; default: break; } } else { /* * Send our own WDTR in reply */ switch(bus_width) { case BUS_8_BIT: scratch &= 0x7f; break; case BUS_32_BIT: /* Negotiate 16_BITS */ bus_width = BUS_16_BIT; case BUS_16_BIT: if(bootverbose) printf("ahc%d: target " "%d using 16Bit " "transfers\n", unit, target); scratch |= 0x80; break; default: break; } outb(HA_RETURN_1 + iobase, bus_width | SEND_WDTR); } ahc->needwdtr &= ~targ_mask; ahc->wdtrpending &= ~targ_mask; outb(HA_TARG_SCRATCH + iobase + scratch_offset, scratch); outb(SCSIRATE + iobase, scratch); break; } case MSG_REJECT: { /* * What we care about here is if we had an * outstanding SDTR or WDTR message for this * target. If we did, this is a signal that * the target is refusing negotiation. */ u_char targ_scratch; targ_scratch = inb(HA_TARG_SCRATCH + iobase + scratch_offset); if(ahc->wdtrpending & targ_mask){ /* note 8bit xfers and clear flag */ targ_scratch &= 0x7f; ahc->needwdtr &= ~targ_mask; ahc->wdtrpending &= ~targ_mask; printf("ahc%d:%c:%d: refuses " "WIDE negotiation. Using " "8bit transfers\n", unit, channel, target); } else if(ahc->sdtrpending & targ_mask){ /* note asynch xfers and clear flag */ targ_scratch &= 0xf0; ahc->needsdtr &= ~targ_mask; ahc->sdtrpending &= ~targ_mask; printf("ahc%d:%c:%d: refuses " "syncronous negotiation. Using " "asyncronous transfers\n", unit, channel, target); } else { /* * Otherwise, we ignore it. */ #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWMISC) printf("ahc%d:%c:%d: Message reject -- ignored\n", unit, channel, target); #endif break; } outb(HA_TARG_SCRATCH + iobase + scratch_offset, targ_scratch); outb(SCSIRATE + iobase, targ_scratch); break; } case BAD_STATUS: { int scb_index; /* The sequencer will notify us when a command * has an error that would be of interest to * the kernel. This allows us to leave the sequencer * running in the common case of command completes * without error. */ scb_index = inb(SCBPTR + iobase); scb = ahc->scbarray[scb_index]; /* * Set the default return value to 0 (don't * send sense). The sense code with change * this if needed and this reduces code * duplication. */ outb(HA_RETURN_1 + iobase, 0); if (!scb || !(scb->flags & SCB_ACTIVE)) { printf("ahc%d:%c:%d: ahcintr - referenced scb " "not valid during seqint 0x%x scb(%d)\n", unit, channel, target, intstat, scb_index); goto clear; } xs = scb->xs; ahc_getscb(iobase, scb); #ifdef AHC_DEBUG if((ahc_debug & AHC_SHOWSCBS) && xs->sc_link->target == DEBUGTARG) ahc_print_scb(scb); #endif xs->status = scb->target_status; switch(scb->target_status){ case SCSI_OK: printf("ahc%d: Interrupted for staus of" " 0???\n", unit); break; case SCSI_CHECK: #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWSENSE) { sc_print_addr(xs->sc_link); printf("requests Check Status\n"); } #endif if((xs->error == XS_NOERROR) && !(scb->flags & SCB_SENSE)) { u_char control = scb->control; u_short active; struct ahc_dma_seg *sg = scb->ahc_dma; struct scsi_sense *sc = &(scb->sense_cmd); u_char tcl = scb->target_channel_lun; #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWSENSE) { sc_print_addr(xs->sc_link); printf("Sending Sense\n"); } #endif bzero(scb, SCB_DOWN_SIZE); scb->control |= control & SCB_DISCENB; scb->flags |= SCB_SENSE; sc->op_code = REQUEST_SENSE; sc->byte2 = xs->sc_link->lun << 5; sc->length = sizeof(struct scsi_sense_data); sc->control = 0; sg->addr = KVTOPHYS(&xs->sense); sg->len = sizeof(struct scsi_sense_data); scb->target_channel_lun = tcl; scb->SG_segment_count = 1; scb->SG_list_pointer = KVTOPHYS(sg); scb->cmdpointer = KVTOPHYS(sc); scb->cmdlen = sizeof(*sc); scb->data = sg->addr; scb->datalen[0] = sg->len & 0xff; scb->datalen[1] = (sg->len >> 8) & 0xff; scb->datalen[2] = (sg->len >> 16) & 0xff; outb(SCBCNT + iobase, 0x80); outsb(SCBARRAY+iobase,scb,SCB_DOWN_SIZE); outb(SCBCNT + iobase, 0); outb(SCBARRAY+iobase+30,SCB_LIST_NULL); /* * Ensure that the target is "BUSY" * so we don't get overlapping * commands if we happen to be doing * tagged I/O. */ active = inb(HA_ACTIVE0 + iobase) | (inb(HA_ACTIVE1 + iobase) << 8); active |= targ_mask; outb(HA_ACTIVE0 + iobase,active & 0xff); outb(HA_ACTIVE1 + iobase, (active >> 8) & 0xff); ahc_add_waiting_scb(iobase, scb, list_head); outb(HA_RETURN_1 + iobase, SEND_SENSE); break; } /* * Clear the SCB_SENSE Flag and have * the sequencer do a normal command * complete with either a "DRIVER_STUFFUP" * error or whatever other error condition * we already had. */ scb->flags &= ~SCB_SENSE; if(xs->error == XS_NOERROR) xs->error = XS_DRIVER_STUFFUP; break; case SCSI_BUSY: xs->error = XS_BUSY; sc_print_addr(xs->sc_link); printf("Target Busy\n"); break; case SCSI_QUEUE_FULL: /* * The upper level SCSI code will eventually * handle this properly. */ sc_print_addr(xs->sc_link); printf("Queue Full\n"); xs->error = XS_BUSY; break; default: sc_print_addr(xs->sc_link); printf("unexpected targ_status: %x\n", scb->target_status); xs->error = XS_DRIVER_STUFFUP; break; } break; } case RESIDUAL: { int scb_index; scb_index = inb(SCBPTR + iobase); scb = ahc->scbarray[scb_index]; xs = scb->xs; /* * Don't clobber valid resid info with * a resid coming from a check sense * operation. */ if(!(scb->flags & SCB_SENSE)) { scb->xs->resid = (inb(iobase+SCBARRAY+17) << 16) | (inb(iobase+SCBARRAY+16) << 8) | inb(iobase+SCBARRAY+15); xs->flags |= SCSI_RESID_VALID; #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWMISC) { sc_print_addr(xs->sc_link); printf("Handled Residual of %ld bytes\n" "SG_COUNT == %d\n", scb->xs->resid, inb(SCBARRAY+18 + iobase)); } #endif } break; } case ABORT_TAG: { int scb_index; scb_index = inb(SCBPTR + iobase); scb = ahc->scbarray[scb_index]; xs = scb->xs; /* * We didn't recieve a valid tag back from * the target on a reconnect. */ sc_print_addr(xs->sc_link); printf("invalid tag recieved -- sending ABORT_TAG\n"); scb->xs->error = XS_DRIVER_STUFFUP; untimeout(ahc_timeout, (caddr_t)scb); ahc_done(unit, scb); break; } case AWAITING_MSG: { int scb_index; scb_index = inb(SCBPTR + iobase); scb = ahc->scbarray[scb_index]; /* * This SCB had a zero length command, informing * the sequencer that we wanted to send a special * message to this target. We only do this for * BUS_DEVICE_RESET messages currently. */ if(scb->flags & SCB_DEVICE_RESET) { outb(HA_MSG_START + iobase, MSG_BUS_DEVICE_RESET); outb(HA_MSG_LEN + iobase, 1); } else panic("ahcintr: AWAITING_MSG for an SCB that" "does not have a waiting message"); break; } case IMMEDDONE: { /* * Take care of device reset messages */ u_char scbindex = inb(SCBPTR + iobase); scb = ahc->scbarray[scbindex]; if(scb->flags & SCB_DEVICE_RESET) { u_char targ_scratch; int found; /* * Go back to async/narrow transfers and * renegotiate. */ ahc_unbusy_target(target, channel, iobase); ahc->needsdtr |= ahc->needsdtr_orig & targ_mask; ahc->needwdtr |= ahc->needwdtr_orig & targ_mask; ahc->sdtrpending &= ~targ_mask; ahc->wdtrpending &= ~targ_mask; targ_scratch = inb(HA_TARG_SCRATCH + iobase + scratch_offset); targ_scratch &= SXFR; outb(HA_TARG_SCRATCH + iobase + scratch_offset, targ_scratch); found = ahc_reset_device(unit, ahc, target, channel, SCB_LIST_NULL, XS_NOERROR); #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) { sc_print_addr(scb->xs->sc_link); printf("Bus Device Reset delivered. " "%d SCBs aborted\n", found); } #endif } else panic("ahcintr: Immediate complete for " "unknown operation."); break; } default: printf("ahc: seqint, " "intstat == 0x%x, scsisigi = 0x%x\n", intstat, inb(SCSISIGI + iobase)); break; } clear: /* * Clear the upper byte that holds SEQINT status * codes and clear the SEQINT bit. */ outb(CLRINT + iobase, CLRSEQINT); /* * The sequencer is paused immediately on * a SEQINT, so we should restart it when * we leave this section. */ UNPAUSE_SEQUENCER(ahc); } if (intstat & SCSIINT) { int scb_index = inb(SCBPTR + iobase); status = inb(SSTAT1 + iobase); scb = ahc->scbarray[scb_index]; if (!scb || !(scb->flags & SCB_ACTIVE)) { printf("ahc%d: ahcintr - referenced scb not " "valid during scsiint 0x%x scb(%d)\n", unit, status, scb_index); outb(CLRSINT1 + iobase, status); UNPAUSE_SEQUENCER(ahc); outb(CLRINT + iobase, CLRSCSIINT); scb = NULL; goto cmdcomplete; } xs = scb->xs; if (status & SELTO) { u_char waiting; u_char flags; outb(SCSISEQ + iobase, ENRSELI); xs->error = XS_TIMEOUT; /* * Clear any pending messages for the timed out * target, and mark the target as free */ flags = inb( HA_FLAGS + iobase ); outb(HA_FLAGS + iobase, flags & ~ACTIVE_MSG); ahc_unbusy_target(xs->sc_link->target, ((long)xs->sc_link->fordriver & SELBUSB) ? 'B' : 'A', iobase); outb(SCBARRAY + iobase, SCB_NEEDDMA); outb(CLRSINT1 + iobase, CLRSELTIMEO); outb(CLRINT + iobase, CLRSCSIINT); /* Shift the waiting for selection queue forward */ waiting = inb(WAITING_SCBH + iobase); outb(SCBPTR + iobase, waiting); waiting = inb(SCBARRAY + iobase + 30); outb(WAITING_SCBH + iobase, waiting); RESTART_SEQUENCER(ahc); } else if (status & SCSIPERR) { sc_print_addr(xs->sc_link); printf("parity error\n"); xs->error = XS_DRIVER_STUFFUP; outb(CLRSINT1 + iobase, CLRSCSIPERR); UNPAUSE_SEQUENCER(ahc); outb(CLRINT + iobase, CLRSCSIINT); scb = NULL; } else if (!(status & BUSFREE)) { sc_print_addr(xs->sc_link); printf("Unknown SCSIINT. Status = 0x%x\n", status); outb(CLRSINT1 + iobase, status); UNPAUSE_SEQUENCER(ahc); outb(CLRINT + iobase, CLRSCSIINT); scb = NULL; } if(scb != NULL) { /* We want to process the command */ untimeout(ahc_timeout, (caddr_t)scb); ahc_done(unit, scb); } } cmdcomplete: if (intstat & CMDCMPLT) { int scb_index; do { scb_index = inb(QOUTFIFO + iobase); scb = ahc->scbarray[scb_index]; if (!scb || !(scb->flags & SCB_ACTIVE)) { printf("ahc%d: WARNING " "no command for scb %d (cmdcmplt)\n" "QOUTCNT == %d\n", unit, scb_index, inb(QOUTCNT + iobase)); outb(CLRINT + iobase, CLRCMDINT); continue; } outb(CLRINT + iobase, CLRCMDINT); untimeout(ahc_timeout, (caddr_t)scb); ahc_done(unit, scb); } while (inb(QOUTCNT + iobase)); } return 1; } void ahc_eisa_intr(arg) void *arg; { /* printf("Foo\n"); DELAY(10000000);*/ ahcintr(arg); } static int enable_seeprom(u_long offset, u_short CS, /* chip select */ u_short CK, /* clock */ u_short DO, /* data out */ u_short DI, /* data in */ u_short RDY, /* ready */ u_short MS /* mode select */) { int wait; /* * Request access of the memory port. When access is * granted, SEERDY will go high. We use a 1 second * timeout which should be near 1 second more than * is needed. Reason: after the chip reset, there * should be no contention. */ outb(offset, MS); wait = 1000; /* 1 second timeout in msec */ while (--wait && ((inb(offset) & RDY) == 0)) { DELAY (1000); /* delay 1 msec */ } if ((inb(offset) & RDY) == 0) { outb (offset, 0); return (0); } return(1); } static void release_seeprom(u_long offset, u_short CS, /* chip select */ u_short CK, /* clock */ u_short DO, /* data out */ u_short DI, /* data in */ u_short RDY, /* ready */ u_short MS /* mode select */) { /* Release access to the memory port and the serial EEPROM. */ outb(offset, 0); } /* * We have a scb which has been processed by the * adaptor, now we look to see how the operation * went. */ static void ahc_done(unit, scb) int unit; struct scb *scb; { struct scsi_xfer *xs = scb->xs; SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_done\n")); /* * Put the results of the operation * into the xfer and call whoever started it */ if(scb->flags & SCB_SENSE) xs->error = XS_SENSE; if ((xs->flags & SCSI_ERR_OK) && !(xs->error == XS_SENSE)) { /* All went correctly OR errors expected */ xs->error = XS_NOERROR; } xs->flags |= ITSDONE; #ifdef AHC_TAGENABLE if(xs->cmd->opcode == 0x12 && xs->error == XS_NOERROR) { struct ahc_data *ahc = ahcdata[unit]; struct scsi_inquiry_data *inq_data; u_short mask = 0x01 << (xs->sc_link->target | (scb->target_channel_lun & 0x08)); /* * Sneak a look at the results of the SCSI Inquiry * command and see if we can do Tagged queing. This * should really be done by the higher level drivers. */ inq_data = (struct scsi_inquiry_data *)xs->data; if(((inq_data->device & SID_TYPE) == 0) && (inq_data->flags & SID_CmdQue) && !(ahc->tagenable & mask)) { /* * Disk type device and can tag */ printf("ahc%d: target %d Tagged Queuing Device\n", unit, xs->sc_link->target); ahc->tagenable |= mask; #ifdef QUEUE_FULL_SUPPORTED xs->sc_link->opennings += 2; #endif } } #endif ahc_free_scb(unit, scb, xs->flags); scsi_done(xs); } /* * Start the board, ready for normal operation */ int ahc_init(unit) int unit; { struct ahc_data *ahc = ahcdata[unit]; u_long iobase = ahc->baseport; u_char scsi_conf, sblkctl, i, host_id; int max_targ = 15, have_seeprom = 0; int bios_disabled = 0; struct seeprom_config sc; /* * Assume we have a board at this stage and it has been reset. */ #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWMISC) printf("ahc%d: scb %d bytes; ahc_dma %d bytes\n", unit, sizeof(struct scb), sizeof(struct ahc_dma_seg)); #endif /* AHC_DEBUG */ if(bootverbose) printf("ahc%d: reading board settings\n", unit); switch( ahc->type ) { case AHC_AIC7770: case AHC_274: case AHC_284: { u_char hostconf; if(ahc->type == AHC_274) { printf("ahc%d: 274x ", unit); if((inb(HA_274_BIOSCTRL + iobase) & BIOSMODE) == BIOSDISABLED) bios_disabled = 1; } else if(ahc->type == AHC_284) printf("ahc%d: 284x ", unit); else printf("ahc%d: Motherboard ", unit); ahc->maxscbs = 0x4; /* Should we only do this for the 27/284x? */ /* Setup the FIFO threshold and the bus off time */ hostconf = inb(HA_HOSTCONF + iobase); outb(BUSSPD + iobase, hostconf & DFTHRSH); outb(BUSTIME + iobase, (hostconf << 2) & BOFF); break; } case AHC_AIC7850: case AHC_AIC7870: case AHC_AIC7880: case AHC_394U: case AHC_394: case AHC_294U: case AHC_294: host_id = 0x07; /* defat to SCSI ID 7 for 7850 */ if (ahc->type & AHC_AIC7870) { unsigned short *scarray = (u_short *)≻ unsigned short checksum = 0; if(bootverbose) printf("ahc%d: Reading SEEPROM...", unit); have_seeprom = enable_seeprom (iobase + SEECTL, SEECS, SEECK, SEEDO, SEEDI, SEERDY, SEEMS); if (have_seeprom) { have_seeprom = read_seeprom (iobase + SEECTL, (u_short *)&sc, ahc->flags & AHC_CHNLB, sizeof(sc)/2, SEECS, SEECK, SEEDO, SEEDI, SEERDY, SEEMS); release_seeprom (iobase + SEECTL, SEECS, SEECK, SEEDO, SEEDI, SEERDY, SEEMS); if (have_seeprom) { /* Check checksum */ for (i = 0;i < (sizeof(sc)/2 - 1);i = i + 1) checksum = checksum + scarray[i]; if (checksum != sc.checksum) { printf ("checksum error"); have_seeprom = 0; } else { if(bootverbose) printf("done.\n"); host_id = (sc.brtime_id & CFSCSIID); } } } if (!have_seeprom) { printf("\nahc%d: SEEPROM read failed, " "using leftover BIOS values\n", unit); host_id = 0x7; } } ahc->maxscbs = 0x10; if(ahc->type == AHC_394) printf("ahc%d: 3940 ", unit); else if(ahc->type == AHC_294) printf("ahc%d: 2940 ", unit); else if(ahc->type == AHC_AIC7850){ printf("ahc%d: aic7850 ", unit); ahc->maxscbs = 0x03; } else printf("ahc%d: aic7870 ", unit); outb(DSPCISTATUS + iobase, 0xc0 /* DFTHRSH == 100% */); /* * XXX Use SCSI ID from SEEPROM if we have it; otherwise * its hardcoded to 7 until we can read it from NVRAM. */ outb(HA_SCSICONF + iobase, host_id | 0xc0 /* DFTHRSH = 100% */); /* In case we are a wide card */ outb(HA_SCSICONF + 1 + iobase, host_id); break; default: }; if(ahc->type & AHC_ULTRA) { printf("Ultra "); if(have_seeprom) { /* Should we enable Ultra mode? */ if(!(sc.adapter_control & CFULTRAEN)) /* Treat it like a normal card */ ahc->type &= ~AHC_ULTRA; } } /* Determine channel configuration and who we are on the scsi bus. */ switch ( (sblkctl = inb(SBLKCTL + iobase) & 0x0a) ) { case 0: ahc->our_id = (inb(HA_SCSICONF + iobase) & HSCSIID); if(ahc->type == AHC_394) printf("Channel %c, SCSI Id=%d, ", ahc->flags & AHC_CHNLB ? 'B' : 'A', ahc->our_id); else printf("Single Channel, SCSI Id=%d, ", ahc->our_id); outb(HA_FLAGS + iobase, SINGLE_BUS); break; case 2: ahc->our_id = (inb(HA_SCSICONF + 1 + iobase) & HWSCSIID); if(ahc->type == AHC_394) printf("Wide Channel %c, SCSI Id=%d, ", ahc->flags & AHC_CHNLB ? 'B' : 'A', ahc->our_id); else printf("Wide Channel, SCSI Id=%d, ", ahc->our_id); ahc->type |= AHC_WIDE; outb(HA_FLAGS + iobase, WIDE_BUS); break; case 8: ahc->our_id = (inb(HA_SCSICONF + iobase) & HSCSIID); ahc->our_id_b = (inb(HA_SCSICONF + 1 + iobase) & HSCSIID); printf("Twin Channel, A SCSI Id=%d, B SCSI Id=%d, ", ahc->our_id, ahc->our_id_b); ahc->type |= AHC_TWIN; outb(HA_FLAGS + iobase, TWIN_BUS); break; default: printf(" Unsupported adapter type. Ignoring\n"); return(-1); } /* * Take the bus led out of diagnostic mode */ outb(SBLKCTL + iobase, sblkctl); /* * Number of SCBs that will be used. Rev E aic7770s supposedly * can do 255 concurrent commands. Right now, we just ID the * card until we can find out how this is done. */ switch(ahc->type & ~(AHC_TWIN | AHC_WIDE)) { case AHC_AIC7770: { /* * See if we have a Rev E or higher * aic7770. Anything below a Rev E will * have a R/O autoflush disable configuration * bit. */ u_char sblkctl_orig; sblkctl_orig = inb(SBLKCTL + iobase); sblkctl = sblkctl_orig ^ AUTOFLUSHDIS; outb(SBLKCTL + iobase, sblkctl); sblkctl = inb(SBLKCTL + iobase); if(sblkctl != sblkctl_orig) { printf("aic7770 >= Rev E, "); /* * Ensure autoflush is enabled */ sblkctl &= ~AUTOFLUSHDIS; outb(SBLKCTL + iobase, sblkctl); } else printf("aic7770 <= Rev C, "); break; } case AHC_394U: case AHC_294U: case AHC_AIC7880: printf("aic7880, "); break; case AHC_AIC7850: printf("aic7850, "); break; case AHC_394: case AHC_294: case AHC_AIC7870: printf("aic7870, "); break; default: break; } if(ahc->flags & AHC_EXTSCB) { /* * This adapter has external SCB memory. * Walk the SCBs to determine how many there are. */ for(i = 0; i < AHC_SCB_MAX; i++) { outb(SCBPTR + iobase, i); outb(SCBARRAY + iobase, 0xaa); if(inb(SCBARRAY + iobase) == 0xaa){ outb(SCBARRAY + iobase, 0x55); if(inb(SCBARRAY + iobase) == 0x55) { continue; } } break; } ahc->maxscbs = i; } printf("%d SCBs\n", ahc->maxscbs); if(!(ahc->type & AHC_AIC78X0) && bootverbose) { if(ahc->pause & IRQMS) printf("ahc%d: Using Level Sensitive Interrupts\n", unit); else printf("ahc%d: Using Edge Triggered Interrupts\n", unit); } /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ if( ahc->type & AHC_TWIN) { /* * The device is gated to channel B after a chip reset, * so set those values first */ outb(SCSIID + iobase, ahc->our_id_b); scsi_conf = inb(HA_SCSICONF + 1 + iobase) & (ENSPCHK|STIMESEL); outb(SXFRCTL1 + iobase, scsi_conf|ENSTIMER|ACTNEGEN|STPWEN); outb(SIMODE1 + iobase, ENSELTIMO|ENSCSIPERR); if(ahc->type & AHC_ULTRA) outb(SXFRCTL0 + iobase, DFON|SPIOEN|ULTRAEN); else outb(SXFRCTL0 + iobase, DFON|SPIOEN); /* Reset the bus */ outb(SCSISEQ + iobase, SCSIRSTO); DELAY(1000); outb(SCSISEQ + iobase, 0); /* Select Channel A */ outb(SBLKCTL + iobase, 0); } outb(SCSIID + iobase, ahc->our_id); scsi_conf = inb(HA_SCSICONF + iobase) & (ENSPCHK|STIMESEL); outb(SXFRCTL1 + iobase, scsi_conf|ENSTIMER|ACTNEGEN|STPWEN); outb(SIMODE1 + iobase, ENSELTIMO|ENSCSIPERR); if(ahc->type & AHC_ULTRA) outb(SXFRCTL0 + iobase, DFON|SPIOEN|ULTRAEN); else outb(SXFRCTL0 + iobase, DFON|SPIOEN); /* Reset the bus */ outb(SCSISEQ + iobase, SCSIRSTO); DELAY(1000); outb(SCSISEQ + iobase, 0); /* * Look at the information that board initialization or * the board bios has left us. In the lower four bits of each * target's scratch space any value other than 0 indicates * that we should initiate syncronous transfers. If it's zero, * the user or the BIOS has decided to disable syncronous * negotiation to that target so we don't activate the needsdr * flag. */ ahc->needsdtr_orig = 0; ahc->needwdtr_orig = 0; /* Grab the disconnection disable table and invert it for our needs */ if(have_seeprom) ahc->discenable = 0; else if(bios_disabled){ printf("ahc%d: Host Adapter Bios disabled. Using default SCSI " "device parameters\n", unit); ahc->discenable = 0xff; } else ahc->discenable = ~(inw(HA_DISC_DSB + iobase)); if(!(ahc->type & AHC_WIDE)) max_targ = 7; for(i = 0; i <= max_targ; i++){ u_char target_settings; if (have_seeprom) { target_settings = (sc.device_flags[i] & CFXFER) << 4; if (sc.device_flags[i] & CFSYNCH) ahc->needsdtr_orig |= (0x01 << i); if (sc.device_flags[i] & CFWIDEB) ahc->needwdtr_orig |= (0x01 << i); if (sc.device_flags[i] & CFDISC) ahc->discenable |= (0x01 << i); } else if (bios_disabled) { target_settings = 0; /* 10MHz */ ahc->needsdtr_orig |= (0x01 << i); ahc->needwdtr_orig |= (0x01 << i); } else { /* Take the settings leftover in scratch RAM. */ target_settings = inb(HA_TARG_SCRATCH + i + iobase); if(target_settings & 0x0f){ ahc->needsdtr_orig |= (0x01 << i); /*Default to a asyncronous transfers(0 offset)*/ target_settings &= 0xf0; } if(target_settings & 0x80){ ahc->needwdtr_orig |= (0x01 << i); /* * We'll set the Wide flag when we * are successful with Wide negotiation, * so turn it off for now so we aren't * confused. */ target_settings &= 0x7f; } } outb(HA_TARG_SCRATCH+i+iobase,target_settings); } /* * If we are not a WIDE device, forget WDTR. This * makes the driver work on some cards that don't * leave these fields cleared when the BIOS is not * installed. */ if(!(ahc->type & AHC_WIDE)) ahc->needwdtr_orig = 0; ahc->needsdtr = ahc->needsdtr_orig; ahc->needwdtr = ahc->needwdtr_orig; ahc->sdtrpending = 0; ahc->wdtrpending = 0; ahc->tagenable = 0; /* * Clear the control byte for every SCB so that the sequencer * doesn't get confused and think that one of them is valid */ for(i = 0; i < ahc->maxscbs; i++) { outb(SCBPTR + iobase, i); outb(SCBARRAY + iobase, 0); } #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWMISC) printf("NEEDSDTR == 0x%x\nNEEDWDTR == 0x%x\n" "DISCENABLE == 0x%x\n", ahc->needsdtr, ahc->needwdtr, ahc->discenable); #endif /* * Set the number of availible SCBs */ outb(HA_SCBCOUNT + iobase, ahc->maxscbs); /* We don't have any busy targets right now */ outb( HA_ACTIVE0 + iobase, 0 ); outb( HA_ACTIVE1 + iobase, 0 ); /* We don't have any waiting selections */ outb( WAITING_SCBH + iobase, SCB_LIST_NULL ); outb( WAITING_SCBT + iobase, SCB_LIST_NULL ); /* * Load the Sequencer program and Enable the adapter. * Place the aic7xxx in fastmode which makes a big * difference when doing many small block transfers. */ if(bootverbose) printf("ahc%d: Downloading Sequencer Program...", unit); ahc_loadseq(iobase); if(bootverbose) printf("Done\n"); outb(SEQCTL + iobase, FASTMODE); if (!(ahc->type & AHC_AIC78X0)) outb(BCTL + iobase, ENABLE); UNPAUSE_SEQUENCER(ahc); /* * Note that we are going and return (to probe) */ ahc->flags = AHC_INIT; return (0); } static void ahcminphys(bp) struct buf *bp; { /* * Even though the card can transfer up to 16megs per command * we are limited by the number of segments in the dma segment * list that we can hold. The worst case is that all pages are * discontinuous physically, hense the "page per segment" limit * enforced here. */ if (bp->b_bcount > ((AHC_NSEG - 1) * PAGESIZ)) { bp->b_bcount = ((AHC_NSEG - 1) * PAGESIZ); } } /* * start a scsi operation given the command and * the data address, target, and lun all of which * are stored in the scsi_xfer struct */ static int32 ahc_scsi_cmd(xs) struct scsi_xfer *xs; { struct scb *scb = NULL; struct ahc_dma_seg *sg; int seg; /* scatter gather seg being worked on */ int thiskv; physaddr thisphys, nextphys; int unit = xs->sc_link->adapter_unit; u_short mask = (0x01 << (xs->sc_link->target | ((u_long)xs->sc_link->fordriver & 0x08))); int bytes_this_seg, bytes_this_page, datalen, flags; struct ahc_data *ahc = ahcdata[unit]; int s; SC_DEBUG(xs->sc_link, SDEV_DB2, ("ahc_scsi_cmd\n")); /* * get an scb 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 (flags & ITSDONE) { printf("ahc%d: Already done?", unit); xs->flags &= ~ITSDONE; } if (!(flags & INUSE)) { printf("ahc%d: Not in use?", unit); xs->flags |= INUSE; } if (!(scb = ahc_get_scb(unit, flags))) { xs->error = XS_DRIVER_STUFFUP; return (TRY_AGAIN_LATER); } SC_DEBUG(xs->sc_link, SDEV_DB3, ("start scb(%p)\n", scb)); scb->xs = xs; if (flags & SCSI_RESET) scb->flags |= SCB_DEVICE_RESET|SCB_IMMED; /* * Put all the arguments for the xfer in the scb */ if(ahc->tagenable & mask) scb->control |= SCB_TE; if(ahc->discenable & mask) scb->control |= SCB_DISCENB; if((ahc->needwdtr & mask) && !(ahc->wdtrpending & mask)) { scb->control |= SCB_NEEDWDTR; ahc->wdtrpending |= mask; } else if((ahc->needsdtr & mask) && !(ahc->sdtrpending & mask)) { scb->control |= SCB_NEEDSDTR; ahc->sdtrpending |= mask; } scb->target_channel_lun = ((xs->sc_link->target << 4) & 0xF0) | ((u_long)xs->sc_link->fordriver & 0x08) | (xs->sc_link->lun & 0x07); scb->cmdlen = xs->cmdlen; scb->cmdpointer = KVTOPHYS(xs->cmd); xs->resid = 0; xs->status = 0; if (xs->datalen) { /* should use S/G only if not zero length */ scb->SG_list_pointer = KVTOPHYS(scb->ahc_dma); sg = scb->ahc_dma; seg = 0; { /* * Set up the scatter gather block */ SC_DEBUG(xs->sc_link, SDEV_DB4, ("%ld @%p:- ", xs->datalen, xs->data)); datalen = xs->datalen; thiskv = (int) xs->data; thisphys = KVTOPHYS(thiskv); while ((datalen) && (seg < AHC_NSEG)) { bytes_this_seg = 0; /* put in the base address */ sg->addr = thisphys; SC_DEBUGN(xs->sc_link, SDEV_DB4, ("0x%lx", 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 */ scb->SG_segment_count = seg; /* Copy the first SG into the data pointer area */ scb->data = scb->ahc_dma->addr; scb->datalen[0] = scb->ahc_dma->len & 0xff; scb->datalen[1] = (scb->ahc_dma->len >> 8) & 0xff; scb->datalen[2] = (scb->ahc_dma->len >> 16) & 0xff; SC_DEBUGN(xs->sc_link, SDEV_DB4, ("\n")); if (datalen) { /* there's still data, must have run out of segs! */ printf("ahc_scsi_cmd%d: more than %d DMA segs\n", unit, AHC_NSEG); xs->error = XS_DRIVER_STUFFUP; ahc_free_scb(unit, scb, flags); return (HAD_ERROR); } } else { /* * No data xfer, use non S/G values */ scb->SG_segment_count = 0; scb->SG_list_pointer = 0; scb->data = 0; scb->datalen[0] = 0; scb->datalen[1] = 0; scb->datalen[2] = 0; } /* * Usually return SUCCESSFULLY QUEUED */ #ifdef AHC_DEBUG if((ahc_debug & AHC_SHOWSCBS) && (xs->sc_link->target == DEBUGTARG)) ahc_print_scb(scb); #endif if (!(flags & SCSI_NOMASK)) { s = splbio(); ahc_send_scb(ahc, scb); timeout(ahc_timeout, (caddr_t)scb, (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 */ ahc_send_scb(ahc, scb); SC_DEBUG(xs->sc_link, SDEV_DB3, ("cmd_wait\n")); do { if (ahc_poll(unit, xs->timeout)) { if (!(xs->flags & SCSI_SILENT)) printf("cmd fail\n"); printf("cmd fail\n"); ahc_scb_timeout(unit,ahc,scb); return (HAD_ERROR); } } while (!(xs->flags & ITSDONE)); /* a non command complete intr */ if (xs->error) { return (HAD_ERROR); } return (COMPLETE); } /* * Return some information to the caller about * the adapter and it's capabilities. */ static u_int32 ahc_adapter_info(unit) int unit; { return (2); /* 2 outstanding requests at a time per device */ } /* * A scb (and hence an scb entry on the board is put onto the * free list. */ static void ahc_free_scb(unit, scb, flags) int unit, flags; struct scb *scb; { unsigned int opri; struct ahc_data *ahc = ahcdata[unit]; opri = splbio(); scb->flags = SCB_FREE; scb->next = ahc->free_scb; ahc->free_scb = scb; #ifdef AHC_DEBUG ahc->activescbs--; #endif /* * If there were none, wake abybody waiting for * one to come free, starting with queued entries */ if (!scb->next) { wakeup((caddr_t)&ahc->free_scb); } splx(opri); } /* * Get a free scb * If there are none, see if we can allocate a * new one. Otherwise either return an error or sleep */ static struct scb * ahc_get_scb(unit, flags) int unit, flags; { struct ahc_data *ahc = ahcdata[unit]; unsigned opri; struct scb *scbp; 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 (!(scbp = ahc->free_scb)) { if (ahc->numscbs < ahc->maxscbs) { scbp = (struct scb *) malloc(sizeof(struct scb), M_TEMP, M_NOWAIT); if (scbp) { physaddr scbaddr = KVTOPHYS(scbp); u_long iobase = ahc->baseport; u_char curscb; bzero(scbp, sizeof(struct scb)); scbp->position = ahc->numscbs; ahc->numscbs++; scbp->flags = SCB_ACTIVE; /* * Place in the scbarray * Never is removed. Position * in ahc->scbarray is the scbarray * position on the board we will * load it into. */ ahc->scbarray[scbp->position] = scbp; /* * Initialize the host memory location * of this SCB down on the board and * flag that it should be DMA's before * reference. Also set its psuedo * next pointer (for use in the psuedo * list of SCBs waiting for selection) * to SCB_LIST_NULL. */ scbp->control = SCB_NEEDDMA; scbp->host_scb = scbaddr; scbp->next_waiting = SCB_LIST_NULL; PAUSE_SEQUENCER(ahc); curscb = inb(SCBPTR + iobase); outb(SCBPTR + iobase, scbp->position); outb(SCBCNT + iobase, 0x80); outsb(SCBARRAY+iobase,scbp,31); outb(SCBCNT + iobase, 0); outb(SCBPTR + iobase, curscb); UNPAUSE_SEQUENCER(ahc); scbp->control = 0; } else { printf("ahc%d: Can't malloc SCB\n", unit); } break; } else { if (!(flags & SCSI_NOSLEEP)) { tsleep((caddr_t)&ahc->free_scb, PRIBIO, "ahcscb", 0); continue; } break; } } if (scbp) { /* Get SCB from from free list */ ahc->free_scb = scbp->next; scbp->control = 0; scbp->flags = SCB_ACTIVE; #ifdef AHC_DEBUG ahc->activescbs++; if((ahc_debug & AHC_SHOWMISC) && (ahc->activescbs == ahc->maxscbs)) printf("ahc%d: Max SCBs active\n", unit); #endif } splx(opri); return (scbp); } static void ahc_loadseq(iobase) u_long iobase; { static unsigned char seqprog[] = { # include "aic7xxx_seq.h" }; outb(SEQCTL + iobase, PERRORDIS|SEQRESET|LOADRAM); outsb(SEQRAM + iobase, seqprog, sizeof(seqprog)); outb(SEQCTL + iobase, FASTMODE|SEQRESET); do { outb(SEQCTL + iobase, SEQRESET|FASTMODE); } while (inb(SEQADDR0 + iobase) != 0 && inb(SEQADDR1 + iobase != 0)); } /* * Function to poll for command completion when in poll mode */ static int ahc_poll(int unit, int wait) { /* in msec */ struct ahc_data *ahc = ahcdata[unit]; u_long iobase = ahc->baseport; u_long stport = INTSTAT + iobase; while (--wait) { DELAY(1000); if (inb(stport) & INT_PEND) break; } if (wait == 0) { printf("ahc%d: board not responding\n", unit); return (EIO); } ahcintr((void *)ahc); return (0); } static void ahc_scb_timeout(unit, ahc, scb) int unit; struct ahc_data *ahc; struct scb *scb; { u_long iobase = ahc->baseport; int found = 0; char channel = scb->target_channel_lun & SELBUSB ? 'B': 'A'; /* * Ensure that the card doesn't do anything * behind our back. */ PAUSE_SEQUENCER(ahc); /* * First, determine if we want to do a bus * reset or simply a bus device reset. * If this is the first time that a transaction * has timed out, just schedule a bus device * reset. Otherwise, we reset the bus and * abort all pending I/Os on that bus. */ if(scb->flags & SCB_ABORTED) { /* * Been down this road before. * Do a full bus reset. */ found = ahc_reset_channel(unit, ahc, channel, scb->position, XS_TIMEOUT); #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) printf("ahc%d: Issued Channel %c Bus Reset #1. " "%d SCBs aborted\n", unit, channel, found); #endif } else { /* * Send a Bus Device Reset Message: * The target we select to send the message to may * be entirely different than the target pointed to * by the scb that timed out. If the command is * in the QINFIFO or the waiting for selection list, * its not tying up the bus and isn't responsible * for the delay so we pick off the active command * which should be the SCB selected by SCBPTR. If * its disconnected or active, we device reset the * target scbp points to. Although it may be that * this target is not responsible for the delay, it * may also be that we're timing out on a command that * just takes too much time, so we try the bus device * reset there first. */ u_char active_scb, control; struct scb *active_scbp; active_scb = inb(SCBPTR + iobase); active_scbp = ahc->scbarray[active_scb]; control = inb(SCBARRAY + iobase); /* Test to see if scbp is disconnected */ outb(SCBPTR + iobase, scb->position); if(inb(SCBARRAY + iobase) & SCB_DIS) { scb->flags |= SCB_DEVICE_RESET|SCB_ABORTED; scb->SG_segment_count = 0; scb->SG_list_pointer = 0; scb->data = 0; scb->datalen[0] = 0; scb->datalen[1] = 0; scb->datalen[2] = 0; outb(SCBCNT + iobase, 0x80); outsb(SCBARRAY+iobase,scb,SCB_DOWN_SIZE); outb(SCBCNT + iobase, 0); ahc_add_waiting_scb(iobase, scb, list_second); timeout(ahc_timeout, (caddr_t)scb, (2 * hz)); #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) { sc_print_addr(scb->xs->sc_link); printf("BUS DEVICE RESET message queued.\n"); } #endif UNPAUSE_SEQUENCER(ahc); } /* Is the active SCB really active? */ else if((active_scbp->flags & SCB_ACTIVE) && (control & SCB_NEEDDMA) == SCB_NEEDDMA) { u_char flags = inb(HA_FLAGS + iobase); if(flags & ACTIVE_MSG) { /* * If we're in a message phase, tacking on * another message may confuse the target totally. * The bus is probably wedged, so reset the * channel. */ channel = (active_scbp->target_channel_lun & SELBUSB) ? 'B': 'A'; ahc_reset_channel(unit, ahc, channel, scb->position, XS_TIMEOUT); #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) printf("ahc%d: Issued Channel %c Bus Reset #2. " "%d SCBs aborted\n", unit, channel, found); #endif } else { /* * Load the message buffer and assert attention. */ active_scbp->flags |= SCB_DEVICE_RESET|SCB_ABORTED; if(active_scbp != scb) untimeout(ahc_timeout, (caddr_t)active_scbp); timeout(ahc_timeout, (caddr_t)active_scbp, (2 * hz)); outb(HA_FLAGS + iobase, flags | ACTIVE_MSG); outb(HA_MSG_LEN + iobase, 1); outb(HA_MSG_START + iobase, MSG_BUS_DEVICE_RESET); if(active_scbp->target_channel_lun != scb->target_channel_lun) { /* Give scb a new lease on life */ timeout(ahc_timeout, (caddr_t)scb, (scb->xs->timeout * hz) / 1000); } #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) { sc_print_addr(active_scbp->xs->sc_link); printf("BUS DEVICE RESET message queued.\n"); } #endif UNPAUSE_SEQUENCER(ahc); } } else { /* * No active command to single out, so reset * the bus for the timed out target. */ ahc_reset_channel(unit, ahc, channel, scb->position, XS_TIMEOUT); #ifdef AHC_DEBUG if(ahc_debug & AHC_SHOWABORTS) printf("ahc%d: Issued Channel %c Bus Reset #3. " "%d SCBs aborted\n", unit, channel, found); #endif } } } static void ahc_timeout(void *arg1) { struct scb *scb = (struct scb *)arg1; int unit; struct ahc_data *ahc; int s; s = splhigh(); if (!(scb->flags & SCB_ACTIVE)) { /* Previous timeout took care of me already */ splx(s); return; } unit = scb->xs->sc_link->adapter_unit; ahc = ahcdata[unit]; printf("ahc%d: target %d, lun %d (%s%d) timed out\n", unit ,scb->xs->sc_link->target ,scb->xs->sc_link->lun ,scb->xs->sc_link->device->name ,scb->xs->sc_link->dev_unit); #ifdef SCSIDEBUG show_scsi_cmd(scb->xs); #endif #ifdef AHC_DEBUG if (ahc_debug & AHC_SHOWSCBS) ahc_print_active_scb(ahc); #endif /*AHC_DEBUG */ /* * If it's immediate, don't try to abort it */ if (scb->flags & SCB_IMMED) { scb->xs->retries = 0; /* I MEAN IT ! */ ahc_done(unit, scb); } else { /* abort the operation that has timed out */ ahc_scb_timeout( unit, ahc, scb ); } splx(s); } /* * The device at the given target/channel has been reset. Abort * all active and queued scbs for that target/channel. */ static int ahc_reset_device(unit, ahc, target, channel, timedout_scb, xs_error) int unit; struct ahc_data *ahc; int target; char channel; u_char timedout_scb; u_int32 xs_error; { u_long iobase = ahc->baseport; struct scb *scbp; u_char active_scb; int i = 0; int found = 0; /* restore this when we're done */ active_scb = inb(SCBPTR + iobase); /* * Search the QINFIFO. */ { int saved_queue[AHC_SCB_MAX]; int queued = inb(QINCNT + iobase); for (i = 0; i < (queued - found); i++) { saved_queue[i] = inb(QINFIFO + iobase); scbp = ahc->scbarray[saved_queue[i]]; if (ahc_match_scb (scbp, target, channel)){ /* * We found an scb that needs to be aborted. */ scbp->flags |= SCB_ABORTED; scbp->xs->error |= xs_error; if(scbp->position != timedout_scb) untimeout(ahc_timeout, (caddr_t)scbp); ahc_done (unit, scbp); outb(SCBPTR + iobase, scbp->position); outb(SCBARRAY + iobase, SCB_NEEDDMA); i--; found++; } } /* Now put the saved scbs back. */ for (queued = 0; queued < i; queued++) { outb (QINFIFO + iobase, saved_queue[queued]); } } /* * Search waiting for selection list. */ { u_char next, prev; next = inb(WAITING_SCBH + iobase); /* Start at head of list. */ prev = SCB_LIST_NULL; while (next != SCB_LIST_NULL) { scbp = ahc->scbarray[next]; /* * Select the SCB. */ if (ahc_match_scb(scbp, target, channel)) { next = ahc_abort_wscb(unit, scbp, prev, iobase, timedout_scb, xs_error); found++; } else { outb(SCBPTR + iobase, scbp->position); prev = next; next = inb(SCBARRAY + iobase + 30); } } } /* * Go through the entire SCB array now and look for * commands for this target that are active. These * are other (most likely tagged) commands that * were disconnected when the reset occured. */ for(i = 0; i < ahc->numscbs; i++) { scbp = ahc->scbarray[i]; if((scbp->flags & SCB_ACTIVE) && ahc_match_scb(scbp, target, channel)) { /* Ensure the target is "free" */ ahc_unbusy_target(target, channel, iobase); outb(SCBPTR + iobase, scbp->position); outb(SCBARRAY + iobase, SCB_NEEDDMA); scbp->flags |= SCB_ABORTED; scbp->xs->error |= xs_error; if(scbp->position != timedout_scb) untimeout(ahc_timeout, (caddr_t)scbp); ahc_done (unit, scbp); found++; } } outb(SCBPTR + iobase, active_scb); return found; } /* * Manipulate the waiting for selection list and return the * scb that follows the one that we remove. */ static u_char ahc_abort_wscb (unit, scbp, prev, iobase, timedout_scb, xs_error) int unit; struct scb *scbp; u_char prev; u_long iobase; u_char timedout_scb; u_int32 xs_error; { u_char curscbp, next; int target = ((scbp->target_channel_lun >> 4) & 0x0f); char channel = (scbp->target_channel_lun & SELBUSB) ? 'B' : 'A'; /* * Select the SCB we want to abort and * pull the next pointer out of it. */ curscbp = inb(SCBPTR + iobase); outb(SCBPTR + iobase, scbp->position); next = inb(SCBARRAY + iobase + 30); /* Clear the necessary fields */ outb(SCBARRAY + iobase, SCB_NEEDDMA); outb(SCBARRAY + iobase + 30, SCB_LIST_NULL); ahc_unbusy_target(target, channel, iobase); /* update the waiting list */ if( prev == SCB_LIST_NULL ) /* First in the list */ outb(WAITING_SCBH + iobase, next); else { /* * Select the scb that pointed to us * and update its next pointer. */ outb(SCBPTR + iobase, prev); outb(SCBARRAY + iobase + 30, next); } /* Update the tale pointer */ if(inb(WAITING_SCBT + iobase) == scbp->position) outb(WAITING_SCBT + iobase, prev); /* * Point us back at the original scb position * and inform the SCSI system that the command * has been aborted. */ outb(SCBPTR + iobase, curscbp); scbp->flags |= SCB_ABORTED; scbp->xs->error |= xs_error; if(scbp->position != timedout_scb) untimeout(ahc_timeout, (caddr_t)scbp); ahc_done (unit, scbp); return next; } static void ahc_unbusy_target(target, channel, iobase) u_char target; char channel; u_long iobase; { u_char active; u_long active_port = HA_ACTIVE0 + iobase; if(target > 0x07 || channel == 'B') { /* * targets on the Second channel or * above id 7 store info in byte two * of HA_ACTIVE */ active_port++; } active = inb(active_port); active &= ~(0x01 << (target & 0x07)); outb(active_port, active); } static void ahc_reset_current_bus(iobase) u_long iobase; { outb(SCSISEQ + iobase, SCSIRSTO); DELAY(1000); outb(SCSISEQ + iobase, 0); } static int ahc_reset_channel(unit, ahc, channel, timedout_scb, xs_error) int unit; struct ahc_data *ahc; char channel; u_char timedout_scb; u_int32 xs_error; { u_long iobase = ahc->baseport; u_char sblkctl; char cur_channel; u_long offset, offset_max; int found; /* * Clean up all the state information for the * pending transactions on this bus. */ found = ahc_reset_device(unit, ahc, ALL_TARGETS, channel, timedout_scb, xs_error); if(channel == 'B'){ ahc->needsdtr |= (ahc->needsdtr_orig & 0xff00); ahc->sdtrpending &= 0x00ff; outb(HA_ACTIVE1 + iobase, 0); offset = HA_TARG_SCRATCH + iobase + 8; offset_max = HA_TARG_SCRATCH + iobase + 16; } else if (ahc->type & AHC_WIDE){ ahc->needsdtr = ahc->needsdtr_orig; ahc->needwdtr = ahc->needwdtr_orig; ahc->sdtrpending = 0; ahc->wdtrpending = 0; outb(HA_ACTIVE0 + iobase, 0); outb(HA_ACTIVE1 + iobase, 0); offset = HA_TARG_SCRATCH + iobase; offset_max = HA_TARG_SCRATCH + iobase + 16; } else{ ahc->needsdtr |= (ahc->needsdtr_orig & 0x00ff); ahc->sdtrpending &= 0xff00; outb(HA_ACTIVE0 + iobase, 0); offset = HA_TARG_SCRATCH + iobase; offset_max = HA_TARG_SCRATCH + iobase + 8; } for(;offset < offset_max;offset++) { /* * Revert to async/narrow transfers * until we renegotiate. */ u_char targ_scratch; targ_scratch = inb(offset); targ_scratch &= SXFR; outb(offset, targ_scratch); } /* * Reset the bus and unpause/restart the controller */ /* Case 1: Command for another bus is active */ sblkctl = inb(SBLKCTL + iobase); cur_channel = (sblkctl & SELBUSB) ? 'B' : 'A'; if(cur_channel != channel) { /* * Stealthily reset the other bus * without upsetting the current bus */ outb(SBLKCTL + iobase, sblkctl ^ SELBUSB); ahc_reset_current_bus(iobase); outb(SBLKCTL + iobase, sblkctl); UNPAUSE_SEQUENCER(ahc); } /* Case 2: A command from this bus is active or we're idle */ else { ahc_reset_current_bus(iobase); RESTART_SEQUENCER(ahc); } return found; } static int ahc_match_scb (scb, target, channel) struct scb *scb; int target; char channel; { int targ = (scb->target_channel_lun >> 4) & 0x0f; char chan = (scb->target_channel_lun & SELBUSB) ? 'B' : 'A'; if (target == ALL_TARGETS) return (chan == channel); else return ((chan == channel) && (targ == target)); }