/* * Copyright (c) 1994 Charles Hannum. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $Id: bt742a.c,v 1.28.2.2 1994/08/01 17:13:34 cgd Exp $ */ /* * Originally 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. */ /* * bt742a SCSI driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB int Debugger(); #else /* DDB */ #define Debugger() #endif /* DDB */ typedef u_long physaddr; /* * I/O Port Interface */ #define BT_BASE bt->bt_base #define BT_CTRL_STAT_PORT (BT_BASE + 0x0) /* control & status */ #define BT_CMD_DATA_PORT (BT_BASE + 0x1) /* cmds and datas */ #define BT_INTR_PORT (BT_BASE + 0x2) /* Intr. stat */ /* * BT_CTRL_STAT bits (write) */ #define BT_HRST 0x80 /* Hardware reset */ #define BT_SRST 0x40 /* Software reset */ #define BT_IRST 0x20 /* Interrupt reset */ #define BT_SCRST 0x10 /* SCSI bus reset */ /* * BT_CTRL_STAT bits (read) */ #define BT_STST 0x80 /* Self test in Progress */ #define BT_DIAGF 0x40 /* Diagnostic Failure */ #define BT_INIT 0x20 /* Mbx Init required */ #define BT_IDLE 0x10 /* Host Adapter Idle */ #define BT_CDF 0x08 /* cmd/data out port full */ #define BT_DF 0x04 /* Data in port full */ #define BT_INVDCMD 0x01 /* Invalid command */ /* * BT_CMD_DATA bits (write) */ #define BT_NOP 0x00 /* No operation */ #define BT_MBX_INIT 0x01 /* Mbx initialization */ #define BT_START_SCSI 0x02 /* start scsi command */ #define BT_START_BIOS 0x03 /* start bios command */ #define BT_INQUIRE 0x04 /* Adapter Inquiry */ #define BT_MBO_INTR_EN 0x05 /* Enable MBO available interrupt */ #define BT_SEL_TIMEOUT_SET 0x06 /* set selection time-out */ #define BT_BUS_ON_TIME_SET 0x07 /* set bus-on time */ #define BT_BUS_OFF_TIME_SET 0x08 /* set bus-off time */ #define BT_SPEED_SET 0x09 /* set transfer speed */ #define BT_DEV_GET 0x0a /* return installed devices */ #define BT_CONF_GET 0x0b /* return configuration data */ #define BT_TARGET_EN 0x0c /* enable target mode */ #define BT_SETUP_GET 0x0d /* return setup data */ #define BT_WRITE_CH2 0x1a /* write channel 2 buffer */ #define BT_READ_CH2 0x1b /* read channel 2 buffer */ #define BT_WRITE_FIFO 0x1c /* write fifo buffer */ #define BT_READ_FIFO 0x1d /* read fifo buffer */ #define BT_ECHO 0x1e /* Echo command data */ #define BT_MBX_INIT_EXTENDED 0x81 /* Mbx initialization */ #define BT_INQUIRE_EXTENDED 0x8D /* Adapter Setup Inquiry */ /* Follows command appeared at FirmWare 3.31 */ #define BT_ROUND_ROBIN 0x8f /* Enable/Disable(default) round robin */ #define BT_DISABLE 0x00 /* Parameter value for Disable */ #define BT_ENABLE 0x01 /* Parameter value for Enable */ struct bt_cmd_buf { u_char byte[16]; }; /* * BT_INTR_PORT bits (read) */ #define BT_ANY_INTR 0x80 /* Any interrupt */ #define BT_SCRD 0x08 /* SCSI reset detected */ #define BT_HACC 0x04 /* Command complete */ #define BT_MBOA 0x02 /* MBX out empty */ #define BT_MBIF 0x01 /* MBX in full */ /* * Mail box defs etc. * these could be bigger but we need the bt_softc to fit on a single page.. */ #define BT_MBX_SIZE 32 /* mail box size (MAX 255 MBxs) */ /* don't need that many really */ #define BT_CCB_MAX 32 /* store up to 32CCBs at any one time */ /* in bt742a H/W ( Not MAX ? ) */ #define CCB_HASH_SIZE 32 /* when we have a physical addr. for */ /* a ccb and need to find the ccb in */ /* space, look it up in the hash table */ #define CCB_HASH_SHIFT 9 /* only hash on multiples of 512 */ #define CCB_HASH(x) ((((long int)(x))>>CCB_HASH_SHIFT) % CCB_HASH_SIZE) #define bt_nextmbx( wmb, mbx, mbio ) \ if ( (wmb) == &((mbx)->mbio[BT_MBX_SIZE - 1 ]) ) \ (wmb) = &((mbx)->mbio[0]); \ else \ (wmb)++; typedef struct bt_mbx_out { physaddr ccb_addr; u_char dummy[3]; u_char cmd; } BT_MBO; typedef struct bt_mbx_in { physaddr ccb_addr; u_char btstat; u_char sdstat; u_char dummy; u_char stat; } BT_MBI; struct bt_mbx { BT_MBO mbo[BT_MBX_SIZE]; BT_MBI mbi[BT_MBX_SIZE]; BT_MBO *tmbo; /* Target Mail Box out */ BT_MBI *tmbi; /* Target Mail Box in */ }; /* * mbo.cmd values */ #define BT_MBO_FREE 0x0 /* MBO entry is free */ #define BT_MBO_START 0x1 /* MBO activate entry */ #define BT_MBO_ABORT 0x2 /* MBO abort entry */ /* * mbi.stat values */ #define BT_MBI_FREE 0x0 /* MBI entry is free */ #define BT_MBI_OK 0x1 /* completed without error */ #define BT_MBI_ABORT 0x2 /* aborted ccb */ #define BT_MBI_UNKNOWN 0x3 /* Tried to abort invalid CCB */ #define BT_MBI_ERROR 0x4 /* Completed with error */ #if defined(BIG_DMA) WARNING...THIS WON'T WORK(won't fit on 1 page) /* #define BT_NSEG 2048 /* Number of scatter gather segments - to much vm */ #define BT_NSEG 128 #else #define BT_NSEG 33 #endif /* BIG_DMA */ struct bt_scat_gath { u_long seg_len; physaddr seg_addr; }; struct bt_ccb { u_char opcode; u_char:3, data_in:1, data_out:1,:3; u_char scsi_cmd_length; u_char req_sense_length; /*------------------------------------longword boundary */ u_long data_length; /*------------------------------------longword boundary */ physaddr data_addr; /*------------------------------------longword boundary */ u_char dummy[2]; u_char host_stat; u_char target_stat; /*------------------------------------longword boundary */ u_char target; u_char lun; u_char scsi_cmd[12]; /* 12 bytes (bytes only) */ u_char dummy2[1]; u_char link_id; /*------------------------------------4 longword boundary */ physaddr link_addr; /*------------------------------------longword boundary */ physaddr sense_ptr; /*-----end of HW fields-------------------------------longword boundary */ struct scsi_sense_data scsi_sense; /*------------------------------------longword boundary */ struct bt_scat_gath scat_gath[BT_NSEG]; /*------------------------------------longword boundary */ struct bt_ccb *next; /*------------------------------------longword boundary */ struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */ /*------------------------------------longword boundary */ struct bt_mbx_out *mbx; /* pointer to mail box */ /*------------------------------------longword boundary */ int flags; #define CCB_FREE 0 #define CCB_ACTIVE 1 #define CCB_ABORTED 2 /*------------------------------------longword boundary */ struct bt_ccb *nexthash; /* if two hash the same */ /*------------------------------------longword boundary */ physaddr hashkey; /*physaddr of this ccb */ /*------------------------------------longword boundary */ }; /* * opcode fields */ #define BT_INITIATOR_CCB 0x00 /* SCSI Initiator CCB */ #define BT_TARGET_CCB 0x01 /* SCSI Target CCB */ #define BT_INIT_SCAT_GATH_CCB 0x02 /* SCSI Initiator with scattter gather */ #define BT_RESET_CCB 0x81 /* SCSI Bus reset */ /* * bt_ccb.host_stat values */ #define BT_OK 0x00 /* cmd ok */ #define BT_LINK_OK 0x0a /* Link cmd ok */ #define BT_LINK_IT 0x0b /* Link cmd ok + int */ #define BT_SEL_TIMEOUT 0x11 /* Selection time out */ #define BT_OVER_UNDER 0x12 /* Data over/under run */ #define BT_BUS_FREE 0x13 /* Bus dropped at unexpected time */ #define BT_INV_BUS 0x14 /* Invalid bus phase/sequence */ #define BT_BAD_MBO 0x15 /* Incorrect MBO cmd */ #define BT_BAD_CCB 0x16 /* Incorrect ccb opcode */ #define BT_BAD_LINK 0x17 /* Not same values of LUN for links */ #define BT_INV_TARGET 0x18 /* Invalid target direction */ #define BT_CCB_DUP 0x19 /* Duplicate CCB received */ #define BT_INV_CCB 0x1a /* Invalid CCB or segment list */ #define BT_ABORTED 42 /* pseudo value from driver */ struct bt_extended_inquire { u_char bus_type; /* Type of bus connected to */ #define BT_BUS_TYPE_24BIT 'A' /* ISA bus */ #define BT_BUS_TYPE_32BIT 'E' /* EISA/VLB/PCI bus */ #define BT_BUS_TYPE_MCA 'M' /* MicroChannel bus */ u_char bios_address; /* Address of adapter BIOS */ u_short max_segment; /* ? */ }; struct bt_boardID { u_char board_type; u_char custom_feture; char firm_revision; u_char firm_version; }; struct bt_setup { u_char sync_neg:1; u_char parity:1; u_char :6; u_char speed; u_char bus_on; u_char bus_off; u_char num_mbx; u_char mbx[3]; /*XXX */ /* doesn't make sense with 32bit addresses */ struct { u_char offset:4; u_char period:3; u_char valid:1; } sync[8]; u_char disc_sts; }; struct bt_config { u_char chan; u_char intr; u_char scsi_dev:3; u_char :5; }; #define INT9 0x01 #define INT10 0x02 #define INT11 0x04 #define INT12 0x08 #define INT14 0x20 #define INT15 0x40 #define EISADMA 0x00 #define CHAN0 0x01 #define CHAN5 0x20 #define CHAN6 0x40 #define CHAN7 0x80 #define KVTOPHYS(x) vtophys(x) struct bt_softc { struct device sc_dev; struct isadev sc_id; struct intrhand sc_ih; u_short bt_base; /* base port for each board */ struct bt_mbx bt_mbx; /* all our mailboxes */ struct bt_ccb *bt_ccb_free; /* list of free CCBs */ struct bt_ccb *ccbhash[CCB_HASH_SIZE]; /* phys to kv hash */ u_short bt_int; /* int. read off board */ u_short bt_dma; /* DMA channel read of board */ int bt_scsi_dev; /* adapters scsi id */ int numccbs; /* how many we have malloc'd */ struct scsi_link sc_link; /* prototype for devs */ }; /***********debug values *************/ #define BT_SHOWCCBS 0x01 #define BT_SHOWINTS 0x02 #define BT_SHOWCMDS 0x04 #define BT_SHOWMISC 0x08 int bt_debug = 0; int bt_cmd(); /* XXX must be varargs to prototype */ u_int bt_adapter_info __P((struct bt_softc *)); int btintr __P((struct bt_softc *)); void bt_free_ccb __P((struct bt_softc *, struct bt_ccb *, int)); struct bt_ccb *bt_get_ccb __P((struct bt_softc *, int)); struct bt_ccb *bt_ccb_phys_kv __P((struct bt_softc *, physaddr)); BT_MBO *bt_send_mbo __P((struct bt_softc *, int, int, struct bt_ccb *)); void bt_done __P((struct bt_softc *, struct bt_ccb *)); int bt_find __P((struct bt_softc *)); void bt_init __P((struct bt_softc *)); void bt_inquire_setup_information __P((struct bt_softc *)); void btminphys __P((struct buf *)); int bt_scsi_cmd __P((struct scsi_xfer *)); int bt_poll __P((struct bt_softc *, struct scsi_xfer *, struct bt_ccb *)); void bt_timeout __P((void *arg)); #ifdef UTEST void bt_print_ccb __P((struct bt_ccb *)); void bt_print_active_ccbs __P((struct bt_softc *)); #endif struct scsi_adapter bt_switch = { bt_scsi_cmd, btminphys, 0, 0, bt_adapter_info, "bt" }; /* the below structure is so we have a default dev struct for out link struct */ struct scsi_device bt_dev = { NULL, /* Use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ "bt", 0 }; int btprobe(); void btattach(); struct cfdriver btcd = { NULL, "bt", btprobe, btattach, DV_DULL, sizeof(struct bt_softc) }; #define BT_RESET_TIMEOUT 1000 /* * bt_cmd(bt, icnt, ocnt,wait, retval, opcode, args) * * Activate Adapter command * icnt: number of args (outbound bytes written after opcode) * ocnt: number of expected returned bytes * wait: number of seconds to wait for response * retval: buffer where to place returned bytes * opcode: opcode BT_NOP, BT_MBX_INIT, BT_START_SCSI ... * args: parameters * * Performs an adapter command through the ports. Not to be confused with a * scsi command, which is read in via the dma; one of the adapter commands * tells it to read in a scsi command. */ int bt_cmd(bt, icnt, ocnt, wait, retval, opcode, args) struct bt_softc *bt; int icnt, ocnt, wait; u_char *retval; unsigned opcode; u_char args; { unsigned *ic = &opcode; u_char oc; register i; int sts; /* * multiply the wait argument by a big constant * zero defaults to 1 */ if (wait) wait *= 100000; else wait = 100000; /* * Wait for the adapter to go idle, unless it's one of * the commands which don't need this */ if (opcode != BT_MBX_INIT && opcode != BT_START_SCSI) { i = 100000; /* 1 sec? */ while (--i) { sts = inb(BT_CTRL_STAT_PORT); if (sts & BT_IDLE) { break; } delay(10); } if (!i) { printf("%s: bt_cmd, host not idle(0x%x)\n", bt->sc_dev.dv_xname, sts); return ENXIO; } } /* * Now that it is idle, if we expect output, preflush the * queue feeding to us. */ if (ocnt) { while ((inb(BT_CTRL_STAT_PORT)) & BT_DF) inb(BT_CMD_DATA_PORT); } /* * Output the command and the number of arguments given * for each byte, first check the port is empty. */ icnt++; /* include the command */ while (icnt--) { sts = inb(BT_CTRL_STAT_PORT); for (i = wait; i; i--) { sts = inb(BT_CTRL_STAT_PORT); if (!(sts & BT_CDF)) break; delay(10); } if (!i) { printf("%s: bt_cmd, cmd/data port full\n", bt->sc_dev.dv_xname); outb(BT_CTRL_STAT_PORT, BT_SRST); return ENXIO; } outb(BT_CMD_DATA_PORT, (u_char) (*ic++)); } /* * If we expect input, loop that many times, each time, * looking for the data register to have valid data */ while (ocnt--) { sts = inb(BT_CTRL_STAT_PORT); for (i = wait; i; i--) { sts = inb(BT_CTRL_STAT_PORT); if (sts & BT_DF) break; delay(10); } if (!i) { printf("bt%d: bt_cmd, cmd/data port empty %d\n", bt->sc_dev.dv_xname, ocnt); return ENXIO; } oc = inb(BT_CMD_DATA_PORT); if (retval) *retval++ = oc; } /* * Wait for the board to report a finised instruction */ i = 100000; /* 1 sec? */ while (--i) { sts = inb(BT_INTR_PORT); if (sts & BT_HACC) break; delay(10); } if (!i) { printf("%s: bt_cmd, host not finished(0x%x)\n", bt->sc_dev.dv_xname, sts); return ENXIO; } outb(BT_CTRL_STAT_PORT, BT_IRST); return 0; } /* * Check if the device can be found at the port given * and if so, set it up ready for further work * as an argument, takes the isa_device structure from * autoconf.c */ int btprobe(parent, self, aux) struct device *parent, *self; void *aux; { struct bt_softc *bt = (void *)self; register struct isa_attach_args *ia = aux; #ifdef NEWCONFIG if (ia->ia_iobase == IOBASEUNK) return 0; #endif bt->bt_base = ia->ia_iobase; /* * Try initialise a unit at this location * sets up dma and bus speed, loads bt->bt_int */ if (bt_find(bt) != 0) return 0; /* * If it's there, put in it's interrupt vectors and dma channel */ if (ia->ia_irq != IRQUNK) { if (ia->ia_irq != bt->bt_int) { printf("bt%d: irq mismatch; kernel configured %d != board configured %d\n", bt->sc_dev.dv_unit, ffs(ia->ia_irq) - 1, ffs(bt->bt_int) - 1); return 0; } } else ia->ia_irq = bt->bt_int; if (ia->ia_drq != DRQUNK) { if (ia->ia_drq != bt->bt_dma) { printf("bt%d: drq mismatch; kernel configured %d != board configured %d\n", bt->sc_dev.dv_unit, ia->ia_drq, bt->bt_dma); return 0; } } else ia->ia_drq = bt->bt_dma; ia->ia_msize = 0; ia->ia_iosize = 4; return 1; } btprint() { } /* * Attach all the sub-devices we can find */ void btattach(parent, self, aux) struct device *parent, *self; void *aux; { struct isa_attach_args *ia = aux; struct bt_softc *bt = (void *)self; if (ia->ia_drq != DRQUNK) isa_dmacascade(ia->ia_drq); bt_init(bt); /* * fill in the prototype scsi_link. */ bt->sc_link.adapter_softc = bt; bt->sc_link.adapter_targ = bt->bt_scsi_dev; bt->sc_link.adapter = &bt_switch; bt->sc_link.device = &bt_dev; printf("\n"); #ifdef NEWCONFIG isa_establish(&bt->sc_id, &bt->sc_dev); #endif bt->sc_ih.ih_fun = btintr; bt->sc_ih.ih_arg = bt; bt->sc_ih.ih_level = IPL_BIO; intr_establish(ia->ia_irq, &bt->sc_ih); /* * ask the adapter what subunits are present */ config_found(self, &bt->sc_link, btprint); } /* * Return some information to the caller about the adapter and its * capabilities. */ u_int bt_adapter_info(bt) struct bt_softc *bt; { return 2; /* 2 outstanding requests at a time per device */ } /* * Catch an interrupt from the adaptor */ int btintr(bt) struct bt_softc *bt; { BT_MBI *wmbi; struct bt_mbx *wmbx; struct bt_ccb *ccb; u_char stat; int i, wait; int found = 0; #ifdef UTEST printf("btintr "); #endif /* * First acknowlege the interrupt, Then if it's * not telling about a completed operation * just return. */ stat = inb(BT_INTR_PORT); /* Mail Box out empty ? */ if (stat & BT_MBOA) { printf("%s: Available Free mbo post\n", bt->sc_dev.dv_xname); /* Disable MBO available interrupt */ outb(BT_CMD_DATA_PORT, BT_MBO_INTR_EN); wait = 100000; /* 1 sec enough? */ for (i = wait; i; i--) { if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF)) break; delay(10); } if (!i) { printf("%s: btintr, cmd/data port full\n", bt->sc_dev.dv_xname); outb(BT_CTRL_STAT_PORT, BT_SRST); return 1; } outb(BT_CMD_DATA_PORT, 0x00); /* Disable */ wakeup((caddr_t)&bt->bt_mbx); outb(BT_CTRL_STAT_PORT, BT_IRST); return 1; } if (!(stat & BT_MBIF)) { outb(BT_CTRL_STAT_PORT, BT_IRST); return -1; /* XXX */ } /* * If it IS then process the competed operation */ wmbx = &bt->bt_mbx; wmbi = wmbx->tmbi; AGAIN: while (wmbi->stat != BT_MBI_FREE) { ccb = bt_ccb_phys_kv(bt, (wmbi->ccb_addr)); if (!ccb) { wmbi->stat = BT_MBI_FREE; printf("bt: BAD CCB ADDR!\n"); continue; } found++; if ((stat = wmbi->stat) != BT_MBI_OK) { switch (stat) { case BT_MBI_ABORT: #ifdef UTEST if (bt_debug & BT_SHOWMISC) printf("abort "); #endif ccb->host_stat = BT_ABORTED; break; case BT_MBI_UNKNOWN: ccb = (struct bt_ccb *) 0; #ifdef UTEST if (bt_debug & BT_SHOWMISC) printf("unknown ccb for abort"); #endif break; case BT_MBI_ERROR: break; default: panic("Impossible mbxi status"); } #ifdef UTEST if ((bt_debug & BT_SHOWCMDS) && ccb) { u_char *cp; cp = ccb->scsi_cmd; printf("op=%x %x %x %x %x %x\n", cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); printf("stat %x for mbi addr = 0x%08x\n" ,wmbi->stat, wmbi); printf("addr = 0x%x\n", ccb); } #endif } wmbi->stat = BT_MBI_FREE; if (ccb) { untimeout(bt_timeout, ccb); bt_done(bt, ccb); } /* Set the IN mail Box pointer for next */ bt_nextmbx(wmbi, wmbx, mbi); } if (!found) { for (i = 0; i < BT_MBX_SIZE; i++) { if (wmbi->stat != BT_MBI_FREE) { found++; break; } bt_nextmbx(wmbi, wmbx, mbi); } if (!found) { printf("%s: mbi at 0x%08x should be found, stat=%02x..resync\n", bt->sc_dev.dv_xname, wmbi, stat); } else { found = 0; goto AGAIN; } } wmbx->tmbi = wmbi; outb(BT_CTRL_STAT_PORT, BT_IRST); return 1; } /* * A ccb is put onto the free list. */ void bt_free_ccb(bt, ccb, flags) struct bt_softc *bt; struct bt_ccb *ccb; int flags; { int opri; if (!(flags & SCSI_NOMASK)) opri = splbio(); ccb->next = bt->bt_ccb_free; bt->bt_ccb_free = ccb; ccb->flags = CCB_FREE; /* * If there were none, wake anybody waiting for one to come free, * starting with queued entries. */ if (!ccb->next) wakeup((caddr_t)&bt->bt_ccb_free); if (!(flags & SCSI_NOMASK)) splx(opri); } /* * Get a free ccb * * 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 bt_ccb * bt_get_ccb(bt, flags) struct bt_softc *bt; int flags; { int opri; struct bt_ccb *ccbp; struct bt_mbx *wmbx; /* Mail Box pointer specified unit */ BT_MBO *wmbo; /* Out Mail Box pointer */ 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 (!(ccbp = bt->bt_ccb_free)) { if (bt->numccbs < BT_CCB_MAX) { if (ccbp = (struct bt_ccb *) malloc(sizeof(struct bt_ccb), M_TEMP, M_NOWAIT)) { bzero(ccbp, sizeof(struct bt_ccb)); bt->numccbs++; ccbp->flags = CCB_ACTIVE; /* * put in the phystokv hash table * Never gets taken out. */ ccbp->hashkey = KVTOPHYS(ccbp); hashnum = CCB_HASH(ccbp->hashkey); ccbp->nexthash = bt->ccbhash[hashnum]; bt->ccbhash[hashnum] = ccbp; } else { printf("%s: Can't malloc CCB\n", bt->sc_dev.dv_xname); } goto gottit; } else { if (!(flags & SCSI_NOSLEEP)) { tsleep((caddr_t)&bt->bt_ccb_free, PRIBIO, "btccb", 0); } } } if (ccbp) { /* Get CCB from from free list */ bt->bt_ccb_free = ccbp->next; ccbp->flags = CCB_ACTIVE; } gottit: if (!(flags & SCSI_NOMASK)) splx(opri); return ccbp; } /* * given a physical address, find the ccb that * it corresponds to: */ struct bt_ccb * bt_ccb_phys_kv(bt, ccb_phys) struct bt_softc *bt; physaddr ccb_phys; { int hashnum = CCB_HASH(ccb_phys); struct bt_ccb *ccbp = bt->ccbhash[hashnum]; while (ccbp) { if (ccbp->hashkey == ccb_phys) break; ccbp = ccbp->nexthash; } return ccbp; } /* * Get a MBO and then Send it */ BT_MBO * bt_send_mbo(bt, flags, cmd, ccb) struct bt_softc *bt; int flags, cmd; struct bt_ccb *ccb; { int opri; BT_MBO *wmbo; /* Mail Box Out pointer */ struct bt_mbx *wmbx; /* Mail Box pointer specified unit */ int i, wait; wmbx = &bt->bt_mbx; if (!(flags & SCSI_NOMASK)) opri = splbio(); /* Get the Target OUT mail Box pointer and move to Next */ wmbo = wmbx->tmbo; wmbx->tmbo = (wmbo == &(wmbx->mbo[BT_MBX_SIZE - 1]) ? &(wmbx->mbo[0]) : wmbo + 1); /* * Check the outmail box is free or not. * Note: Under the normal operation, it shuld NOT happen to wait. */ while (wmbo->cmd != BT_MBO_FREE) { wait = 100000; /* 1 sec enough? */ /* Enable MBO available interrupt */ outb(BT_CMD_DATA_PORT, BT_MBO_INTR_EN); for (i = wait; i; i--) { if (!(inb(BT_CTRL_STAT_PORT) & BT_CDF)) break; delay(10); } if (!i) { printf("%s: bt_send_mbo, cmd/data port full\n", bt->sc_dev.dv_xname); outb(BT_CTRL_STAT_PORT, BT_SRST); return NULL; } outb(BT_CMD_DATA_PORT, 0x01); /* Enable */ tsleep((caddr_t)wmbx, PRIBIO, "btsnd", 0);/*XXX can't do this */ /* May be servicing an int */ } /* Link CCB to the Mail Box */ wmbo->ccb_addr = KVTOPHYS(ccb); ccb->mbx = wmbo; wmbo->cmd = cmd; /* Send it! */ outb(BT_CMD_DATA_PORT, BT_START_SCSI); if (!(flags & SCSI_NOMASK)) splx(opri); return wmbo; } /* * We have a ccb which has been processed by the * adaptor, now we look to see how the operation * went. Wake up the owner if waiting */ void bt_done(bt, ccb) struct bt_softc *bt; struct bt_ccb *ccb; { struct scsi_sense_data *s1, *s2; struct scsi_xfer *xs = ccb->xfer; SC_DEBUG(xs->sc_link, SDEV_DB2, ("bt_done\n")); /* * Otherwise, put the results of the operation * into the xfer and call whoever started it */ if ((ccb->host_stat != BT_OK || ccb->target_stat != SCSI_OK) && (!(xs->flags & SCSI_ERR_OK))) { s1 = &(ccb->scsi_sense); s2 = &(xs->sense); if (ccb->host_stat) { switch (ccb->host_stat) { case BT_ABORTED: /* No response */ case BT_SEL_TIMEOUT: /* No response */ SC_DEBUG(xs->sc_link, SDEV_DB3, ("timeout reported back\n")); xs->error = XS_TIMEOUT; break; default: /* Other scsi protocol messes */ xs->error = XS_DRIVER_STUFFUP; SC_DEBUG(xs->sc_link, SDEV_DB3, ("unexpected host_stat: %x\n", ccb->host_stat)); } } else { switch (ccb->target_stat) { case 0x02: *s2 = *s1; xs->error = XS_SENSE; break; case 0x08: xs->error = XS_BUSY; break; default: SC_DEBUG(xs->sc_link, SDEV_DB3, ("unexpected target_stat: %x\n", ccb->target_stat)); xs->error = XS_DRIVER_STUFFUP; } } } else { /* All went correctly OR errors expected */ xs->resid = 0; } xs->flags |= ITSDONE; bt_free_ccb(bt, ccb, xs->flags); scsi_done(xs); } /* * Find the board and find it's irq/drq */ int bt_find(bt) struct bt_softc *bt; { u_char ad[4]; volatile int i, sts; struct bt_extended_inquire info; struct bt_config conf; /* * reset board, If it doesn't respond, assume * that it's not there.. good for the probe */ outb(BT_CTRL_STAT_PORT, BT_HRST | BT_SRST); for (i = BT_RESET_TIMEOUT; i; i--) { sts = inb(BT_CTRL_STAT_PORT); if (sts == (BT_IDLE | BT_INIT)) break; delay(1000); } if (!i) { #ifdef UTEST printf("bt_find: No answer from bt742a board\n"); #endif return ENXIO; } /* * Check that we actually know how to use this board. */ delay(1000); bt_cmd(bt, 1, sizeof(info), 0, &info, BT_INQUIRE_EXTENDED, sizeof(info)); switch (info.bus_type) { case BT_BUS_TYPE_24BIT: /* XXXX How do we avoid conflicting with the aha1542 probe? */ case BT_BUS_TYPE_32BIT: break; case BT_BUS_TYPE_MCA: /* We don't grok MicroChannel (yet). */ return EINVAL; default: printf("%s: illegal bus type %c\n", bt->sc_dev.dv_xname, info.bus_type); return EINVAL; } /* * Assume we have a board at this stage setup dma channel from * jumpers and save int level */ delay(1000); bt_cmd(bt, 0, sizeof(conf), 0, &conf, BT_CONF_GET); switch (conf.chan) { case EISADMA: bt->bt_dma = DRQUNK; break; case CHAN0: bt->bt_dma = 0; break; case CHAN5: bt->bt_dma = 5; break; case CHAN6: bt->bt_dma = 6; break; case CHAN7: bt->bt_dma = 7; break; default: printf("%s: illegal dma setting %x\n", bt->sc_dev.dv_xname, conf.chan); return EIO; } switch (conf.intr) { case INT9: bt->bt_int = IRQ9; break; case INT10: bt->bt_int = IRQ10; break; case INT11: bt->bt_int = IRQ11; break; case INT12: bt->bt_int = IRQ12; break; case INT14: bt->bt_int = IRQ14; break; case INT15: bt->bt_int = IRQ15; break; default: printf("%s: illegal int setting %x\n", bt->sc_dev.dv_xname, conf.intr); return EIO; } /* who are we on the scsi bus? */ bt->bt_scsi_dev = conf.scsi_dev; return 0; } /* * Start the board, ready for normal operation */ void bt_init(bt) struct bt_softc *bt; { u_char ad[4]; volatile int i; /* * Initialize mail box */ *((physaddr *)ad) = KVTOPHYS(&bt->bt_mbx); bt_cmd(bt, 5, 0, 0, 0, BT_MBX_INIT_EXTENDED, BT_MBX_SIZE, ad[0], ad[1], ad[2], ad[3]); /* * Set Pointer chain null for just in case * Link the ccb's into a free-list W/O mbox * Initialize mail box status to free */ if (bt->bt_ccb_free) { printf("%s: bt_ccb_free is NOT initialized but init here\n", bt->sc_dev.dv_xname); bt->bt_ccb_free = NULL; } for (i = 0; i < BT_MBX_SIZE; i++) { bt->bt_mbx.mbo[i].cmd = BT_MBO_FREE; bt->bt_mbx.mbi[i].stat = BT_MBI_FREE; } /* * Set up initial mail box for round-robin operation. */ bt->bt_mbx.tmbo = &bt->bt_mbx.mbo[0]; bt->bt_mbx.tmbi = &bt->bt_mbx.mbi[0]; bt_inquire_setup_information(bt); } void bt_inquire_setup_information(bt) struct bt_softc *bt; { struct bt_boardID bID; char dummy[8]; struct bt_setup setup; int i; /* Inquire Board ID to Bt742 for firmware version */ bt_cmd(bt, 0, sizeof(bID), 0, &bID, BT_INQUIRE); printf(": version %c.%c, ", bID.firm_revision, bID.firm_version); if (bID.firm_revision != '2') { /* XXXX */ /* Enable round-robin scheme - appeared at firmware rev. 3.31 */ bt_cmd(bt, 1, 0, 0, 0, BT_ROUND_ROBIN, BT_ENABLE); } /* Inquire Installed Devices (to force synchronous negotiation) */ bt_cmd(bt, 0, sizeof(dummy), 10, dummy, BT_DEV_GET); /* Obtain setup information from Bt742. */ bt_cmd(bt, 1, sizeof(setup), 0, &setup, BT_SETUP_GET, sizeof(setup)); printf("%s, %s, %d mbxs", setup.sync_neg ? "sync" : "async", setup.parity ? "parity" : "no parity", setup.num_mbx); for (i = 0; i < 8; i++) { if (!setup.sync[i].valid || (!setup.sync[i].offset && !setup.sync[i].period)) continue; printf("\n%s targ %d: sync, offset %d, period %dnsec", bt->sc_dev.dv_xname, i, setup.sync[i].offset, setup.sync[i].period * 50 + 200); } } void btminphys(bp) struct buf *bp; { if (bp->b_bcount > ((BT_NSEG - 1) << PGSHIFT)) bp->b_bcount = ((BT_NSEG - 1) << PGSHIFT); } /* * start a scsi operation given the command and the data address. Also needs * the unit, target and lu. */ int bt_scsi_cmd(xs) struct scsi_xfer *xs; { struct scsi_link *sc_link = xs->sc_link; struct bt_softc *bt = sc_link->adapter_softc; struct bt_ccb *ccb; struct bt_scat_gath *sg; int seg; /* scatter gather seg being worked on */ int thiskv; physaddr thisphys, nextphys; int bytes_this_seg, bytes_this_page, datalen, flags; struct iovec *iovp; BT_MBO *mbo; SC_DEBUG(sc_link, SDEV_DB2, ("bt_scsi_cmd\n")); /* * get a ccb (mbox-out) to use. If the transfer * is from a buf (possibly from interrupt time) * then we can't allow it to sleep */ flags = xs->flags; if (xs->bp) flags |= (SCSI_NOSLEEP); /* just to be sure */ if (flags & ITSDONE) { printf("%s: Already done?\n", bt->sc_dev.dv_xname); xs->flags &= ~ITSDONE; } if (!(flags & INUSE)) { printf("%s: Not in use?\n", bt->sc_dev.dv_xname); xs->flags |= INUSE; } if (!(ccb = bt_get_ccb(bt, flags))) { xs->error = XS_DRIVER_STUFFUP; return TRY_AGAIN_LATER; } SC_DEBUG(sc_link, SDEV_DB3, ("start ccb(%x)\n", ccb)); /* * Put all the arguments for the xfer in the ccb */ ccb->xfer = xs; if (flags & SCSI_RESET) { ccb->opcode = BT_RESET_CCB; } else { /* can't use S/G if zero length */ ccb->opcode = (xs->datalen ? BT_INIT_SCAT_GATH_CCB : BT_INITIATOR_CCB); } ccb->target = sc_link->target; ccb->data_out = 0; ccb->data_in = 0; ccb->lun = sc_link->lun; ccb->scsi_cmd_length = xs->cmdlen; ccb->sense_ptr = KVTOPHYS(&(ccb->scsi_sense)); ccb->req_sense_length = sizeof(ccb->scsi_sense); if ((xs->datalen) && (!(flags & SCSI_RESET))) { ccb->data_addr = KVTOPHYS(ccb->scat_gath); sg = ccb->scat_gath; 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 < BT_NSEG)) { sg->seg_addr = (physaddr) iovp->iov_base; xs->datalen += sg->seg_len = iovp->iov_len; SC_DEBUGN(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(sc_link, SDEV_DB4, ("%d @0x%x:- ", xs->datalen, xs->data)); datalen = xs->datalen; thiskv = (int) xs->data; thisphys = KVTOPHYS(thiskv); while ((datalen) && (seg < BT_NSEG)) { bytes_this_seg = 0; /* put in the base address */ sg->seg_addr = thisphys; SC_DEBUGN(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 & ~PGOFSET) + NBPG; 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 & ~PGOFSET) + NBPG; if (datalen) thisphys = KVTOPHYS(thiskv); } /* * next page isn't contiguous, finish the seg */ SC_DEBUGN(sc_link, SDEV_DB4, ("(0x%x)", bytes_this_seg)); sg->seg_len = bytes_this_seg; sg++; seg++; } } /* end of iov/kv decision */ ccb->data_length = seg * sizeof(struct bt_scat_gath); SC_DEBUGN(sc_link, SDEV_DB4, ("\n")); if (datalen) { /* * there's still data, must have run out of segs! */ printf("%s: bt_scsi_cmd, more than %d DMA segs\n", bt->sc_dev.dv_xname, BT_NSEG); xs->error = XS_DRIVER_STUFFUP; bt_free_ccb(bt, ccb, flags); return HAD_ERROR; } } else { /* No data xfer, use non S/G values */ ccb->data_addr = (physaddr) 0; ccb->data_length = 0; } ccb->link_id = 0; ccb->link_addr = (physaddr) 0; /* * Put the scsi command in the ccb and start it */ if (!(flags & SCSI_RESET)) bcopy(xs->cmd, ccb->scsi_cmd, ccb->scsi_cmd_length); if (bt_send_mbo(bt, flags, BT_MBO_START, ccb) == (BT_MBO *) 0) { xs->error = XS_DRIVER_STUFFUP; bt_free_ccb(bt, ccb, flags); return TRY_AGAIN_LATER; } /* * Usually return SUCCESSFULLY QUEUED */ SC_DEBUG(sc_link, SDEV_DB3, ("cmd_sent\n")); if (!(flags & SCSI_NOMASK)) { timeout(bt_timeout, ccb, (xs->timeout * hz) / 1000); return SUCCESSFULLY_QUEUED; } /* * If we can't use interrupts, poll on completion */ return bt_poll(bt, xs, ccb); } /* * Poll a particular unit, looking for a particular xs */ int bt_poll(bt, xs, ccb) struct bt_softc *bt; struct scsi_xfer *xs; struct bt_ccb *ccb; { int done = 0; int count = xs->timeout; u_char stat; /* timeouts are in msec, so we loop in 1000 usec cycles */ while (count) { /* * If we had interrupts enabled, would we * have got an interrupt? */ stat = inb(BT_INTR_PORT); if (stat & BT_ANY_INTR) btintr(bt); if (xs->flags & ITSDONE) break; delay(1000); /* only happens in boot so ok */ count--; } if (!count) { /* * We timed out, so call the timeout handler manually, * accounting for the fact that the clock is not running yet * by taking out the clock queue entry it makes. */ bt_timeout(ccb); /* * because we are polling, take out the timeout entry * bt_timeout made */ untimeout(bt_timeout, ccb); count = 2000; while (count) { /* * Once again, wait for the int bit */ stat = inb(BT_INTR_PORT); if (stat & BT_ANY_INTR) btintr(bt); if (xs->flags & ITSDONE) break; delay(1000); /* only happens in boot so ok */ count--; } if (!count) { /* * We timed out again... This is bad. Notice that * this time there is no clock queue entry to remove. */ bt_timeout(ccb); } } if (xs->error) return HAD_ERROR; return COMPLETE; } void bt_timeout(arg) void *arg; { int s = splbio(); struct bt_ccb *ccb = (struct bt_ccb *)arg; struct bt_softc *bt; bt = ccb->xfer->sc_link->adapter_softc; sc_print_addr(ccb->xfer->sc_link); printf("timed out "); #ifdef UTEST bt_print_active_ccbs(bt); #endif /* * If the ccb's mbx is not free, then the board has gone Far East? */ if (bt_ccb_phys_kv(bt, ccb->mbx->ccb_addr) == ccb && ccb->mbx->cmd != BT_MBO_FREE) { printf("%s: not taking commands!\n", bt->sc_dev.dv_xname); Debugger(); } /* * If it has been through before, then * a previous abort has failed, don't * try abort again */ if (ccb->flags == CCB_ABORTED) { /* abort timed out */ printf("AGAIN\n"); ccb->xfer->retries = 0; /* I MEAN IT ! */ ccb->host_stat = BT_ABORTED; bt_done(bt, ccb); } else { /* abort the operation that has timed out */ printf("\n"); bt_send_mbo(bt, ~SCSI_NOMASK, BT_MBO_ABORT, ccb); /* 2 secs for the abort */ ccb->flags = CCB_ABORTED; timeout(bt_timeout, ccb, 2 * hz); } splx(s); } #ifdef UTEST void bt_print_ccb(ccb) struct bt_ccb *ccb; { printf("ccb:%x op:%x cmdlen:%d senlen:%d\n", ccb, ccb->opcode, ccb->scsi_cmd_length, ccb->req_sense_length); printf(" datlen:%d hstat:%x tstat:%x flags:%x\n", ccb->data_length, ccb->host_stat, ccb->target_stat, ccb->flags); } void bt_print_active_ccbs(bt) struct bt_softc *bt; { struct bt_ccb *ccb; int i = 0; while (i < CCB_HASH_SIZE) { ccb = bt->ccbhash[i]; while (ccb) { if (ccb->flags != CCB_FREE) bt_print_ccb(ccb); ccb = ccb->nexthash; } i++; } } #endif /*UTEST */