/* * Written By Julian ELischer * Copyright julian Elischer 1993. * Permission is granted to use or redistribute this file in any way as long * as this notice remains. Julian Elischer does not guarantee that this file * is totally correct for any given task and users of this file must * accept responsibility for any damage that occurs from the application of this * file. * * Written by Julian Elischer (julian@dialix.oz.au) * $Id: scsi_base.c,v 1.52 1997/10/12 08:54:46 joerg Exp $ */ #include "opt_bounce.h" #include "opt_scsi.h" #define SPLSD splbio #define ESUCCESS 0 #include #include #include #include #include #include #include #include #include #include #include static errval sc_err1(struct scsi_xfer *); static errval scsi_interpret_sense(struct scsi_xfer *); static struct scsi_xfer *get_xs( struct scsi_link *sc_link, u_int32_t flags); static void free_xs(struct scsi_xfer *xs, struct scsi_link *sc_link, u_int32_t flags); #ifdef SCSIDEBUG static void show_mem(unsigned char *address, u_int32_t num); static void show_scsi_xs (struct scsi_xfer *); #endif #ifdef notyet static int scsi_sense_qualifiers (struct scsi_xfer *, int *, int *); #endif static struct scsi_xfer *next_free_xs; /* * Get a scsi transfer structure for the caller. Charge the structure * to the device that is referenced by the sc_link structure. If the * sc_link structure has no 'credits' then the device already has the * maximum number or outstanding operations under way. In this stage, * wait on the structure so that when one is freed, we are awoken again * If the SCSI_NOSLEEP flag is set, then do not wait, but rather, return * a NULL pointer, signifying that no slots were available * Note in the link structure, that we are waiting on it. */ static struct scsi_xfer * get_xs(sc_link, flags) struct scsi_link *sc_link; /* who to charge the xs to */ u_int32_t flags; /* if this call can sleep */ { struct scsi_xfer *xs; u_int32_t s; SC_DEBUG(sc_link, SDEV_DB3, ("get_xs\n")); s = splbio(); while (!sc_link->opennings) { SC_DEBUG(sc_link, SDEV_DB3, ("sleeping\n")); if (flags & SCSI_NOSLEEP) { splx(s); return 0; } sc_link->flags |= SDEV_WAITING; tsleep((caddr_t)sc_link, PRIBIO, "scsiget", 0); } sc_link->active++; sc_link->opennings--; if ( (xs = next_free_xs) ) { next_free_xs = xs->next; splx(s); } else { splx(s); SC_DEBUG(sc_link, SDEV_DB3, ("making\n")); xs = malloc(sizeof(*xs), M_TEMP, ((flags & SCSI_NOSLEEP) ? M_NOWAIT : M_WAITOK)); if (xs == NULL) { sc_print_addr(sc_link); printf("cannot allocate scsi xs\n"); return (NULL); } callout_handle_init(&xs->timeout_ch); } SC_DEBUG(sc_link, SDEV_DB3, ("returning\n")); xs->sc_link = sc_link; return (xs); } /* * Given a scsi_xfer struct, and a device (referenced through sc_link) * return the struct to the free pool and credit the device with it * If another process is waiting for an xs, do a wakeup, let it proceed */ static void free_xs(xs, sc_link, flags) struct scsi_xfer *xs; struct scsi_link *sc_link; /* who to credit for returning it */ u_int32_t flags; { xs->next = next_free_xs; next_free_xs = xs; SC_DEBUG(sc_link, SDEV_DB3, ("free_xs\n")); /* if was 0 and someone waits, wake them up */ sc_link->active--; if ((!sc_link->opennings++) && (sc_link->flags & SDEV_WAITING)) { sc_link->flags &= ~SDEV_WAITING; wakeup((caddr_t)sc_link); /* remember, it wakes them ALL up */ } else { if (sc_link->device->start) { SC_DEBUG(sc_link, SDEV_DB2, ("calling private start()\n")); (*(sc_link->device->start)) (sc_link->dev_unit, flags); } } } /* XXX dufault: Replace "sd_size" with "scsi_read_capacity" * when bde is done with sd.c */ /* * Find out from the device what its capacity is. */ u_int32_t scsi_read_capacity(sc_link, blk_size, flags) struct scsi_link *sc_link; u_int32_t *blk_size; u_int32_t flags; { struct scsi_read_cap_data rdcap; struct scsi_read_capacity scsi_cmd; u_int32_t size; /* * make up a scsi command and ask the scsi driver to do * it for you. */ bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = READ_CAPACITY; /* * If the command works, interpret the result as a 4 byte * number of blocks */ if (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) & rdcap, sizeof(rdcap), 4, 5000000, /* WORMs tend to take a HUGE amount of time */ NULL, flags | SCSI_DATA_IN) != 0) { sc_print_addr(sc_link); printf("could not get size\n"); return (0); } else { size = scsi_4btou(&rdcap.addr_3) + 1; if (blk_size) *blk_size = scsi_4btou(&rdcap.length_3); } return (size); } errval scsi_reset_target(sc_link) struct scsi_link *sc_link; { return (scsi_scsi_cmd(sc_link, 0, 0, 0, 0, 1, 2000, NULL, SCSI_RESET)); } errval scsi_target_mode(sc_link, on_off) struct scsi_link *sc_link; int on_off; { struct scsi_generic scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.opcode = SCSI_OP_TARGET; scsi_cmd.bytes[0] = (on_off) ? 1 : 0; return (scsi_scsi_cmd(sc_link, &scsi_cmd, sizeof(scsi_cmd), 0, 0, 1, 2000, NULL, SCSI_ESCAPE)); } /* * Get scsi driver to send a "are you ready?" command */ errval scsi_test_unit_ready(sc_link, flags) struct scsi_link *sc_link; u_int32_t flags; { struct scsi_test_unit_ready scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = TEST_UNIT_READY; return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2, 100000, NULL, flags)); } #ifdef SCSI_2_DEF /* * Do a scsi operation, asking a device to run as SCSI-II if it can. */ errval scsi_change_def(sc_link, flags) struct scsi_link *sc_link; u_int32_t flags; { struct scsi_changedef scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = CHANGE_DEFINITION; scsi_cmd.how = SC_SCSI_2; return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2, 100000, NULL, flags)); } #endif /* SCSI_2_DEF */ /* * Do a scsi operation asking a device what it is * Use the scsi_cmd routine in the switch table. */ errval scsi_inquire(sc_link, inqbuf, flags) struct scsi_link *sc_link; struct scsi_inquiry_data *inqbuf; u_int32_t flags; { struct scsi_inquiry scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = INQUIRY; scsi_cmd.length = sizeof(struct scsi_inquiry_data); return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), (u_char *) inqbuf, sizeof(struct scsi_inquiry_data), 2, 100000, NULL, SCSI_DATA_IN | flags)); } /* * Prevent or allow the user to remove the media */ errval scsi_prevent(sc_link, type, flags) struct scsi_link *sc_link; u_int32_t type, flags; { struct scsi_prevent scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = PREVENT_ALLOW; scsi_cmd.how = type; return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2, 5000, NULL, flags)); } /* * Get scsi driver to send a "start up" command */ errval scsi_start_unit(sc_link, flags) struct scsi_link *sc_link; u_int32_t flags; { struct scsi_start_stop scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = START_STOP; scsi_cmd.how = SSS_START; return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2, 30000, NULL, flags)); } /* * Get scsi driver to send a "stop" command */ errval scsi_stop_unit(sc_link, eject, flags) struct scsi_link *sc_link; u_int32_t eject; u_int32_t flags; { struct scsi_start_stop scsi_cmd; bzero(&scsi_cmd, sizeof(scsi_cmd)); scsi_cmd.op_code = START_STOP; if (eject) { scsi_cmd.how = SSS_LOEJ; } return (scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, sizeof(scsi_cmd), 0, 0, 2, 10000, NULL, flags)); } /* * This routine is called by the scsi interrupt when the transfer is complete. */ void scsi_done(xs) struct scsi_xfer *xs; { struct scsi_link *sc_link = xs->sc_link; struct buf *bp = xs->bp; errval retval; SC_DEBUG(sc_link, SDEV_DB2, ("scsi_done\n")); #ifdef SCSIDEBUG if (sc_link->flags & SDEV_DB1) { show_scsi_cmd(xs); } #endif /*SCSIDEBUG */ /* * If it's a user level request, bypass all usual completion processing, * let the user work it out.. We take reponsibility for freeing the * xs when the user returns. (and restarting the device's queue). */ if (xs->flags & SCSI_USER) { SC_DEBUG(sc_link, SDEV_DB3, ("calling user done()\n")); scsi_user_done(xs); /* to take a copy of the sense etc. */ SC_DEBUG(sc_link, SDEV_DB3, ("returned from user done()\n ")); free_xs(xs, sc_link, SCSI_NOSLEEP); /* restarts queue too */ SC_DEBUG(sc_link, SDEV_DB3, ("returning to adapter\n")); return; } /* * If the device has it's own done routine, call it first. * If it returns a legit error value, return that, otherwise * it wants us to continue with normal processing. */ if (sc_link->device->done) { SC_DEBUG(sc_link, SDEV_DB2, ("calling private done()\n")); retval = (*sc_link->device->done) (xs); if (retval == -1) { free_xs(xs, sc_link, SCSI_NOSLEEP); /*XXX */ return; /* it did it all, finish up */ } /* XXX: This isn't used anywhere. Do you have plans for it, * Julian? (dufault@hda.com). * This allows a private 'done' handler to * resubmit the command if it wants to retry, * In this case the xs must NOT be freed. (julian) */ if (retval == -2) { return; /* it did it all, finish up */ } SC_DEBUG(sc_link, SDEV_DB3, ("continuing with generic done()\n")); } if ((bp = xs->bp) == NULL) { /* * if it's a normal upper level request, then ask * the upper level code to handle error checking * rather than doing it here at interrupt time */ wakeup((caddr_t)xs); return; } /* * Go and handle errors now. * If it returns SCSIRET_DO_RETRY then we should RETRY */ if ((retval = sc_err1(xs)) == SCSIRET_DO_RETRY) { if ((*(sc_link->adapter->scsi_cmd)) (xs) == SUCCESSFULLY_QUEUED) { /* don't wake the job, ok? */ return; } xs->flags |= ITSDONE; } free_xs(xs, sc_link, SCSI_NOSLEEP); /* does a start if needed */ biodone(bp); } /* * ask the scsi driver to perform a command for us. * tell it where to read/write the data, and how * long the data is supposed to be. If we have a buf * to associate with the transfer, we need that too. */ errval scsi_scsi_cmd(sc_link, scsi_cmd, cmdlen, data_addr, datalen, retries, timeout, bp, flags) struct scsi_link *sc_link; struct scsi_generic *scsi_cmd; u_int32_t cmdlen; u_char *data_addr; u_int32_t datalen; u_int32_t retries; u_int32_t timeout; struct buf *bp; u_int32_t flags; { struct scsi_xfer *xs; errval retval; u_int32_t s; /* * Illegal command lengths will wedge host adapter software. * Reject zero length commands and assert all defined commands * are the correct length. */ if ((flags & (SCSI_RESET | SCSI_ESCAPE)) == 0) { if (cmdlen == 0) return EFAULT; else { static u_int8_t sizes[] = {6, 10, 10, 0, 0, 12, 0, 0 }; u_int8_t size = sizes[((scsi_cmd->opcode) >> 5)]; if (size && (size != cmdlen)) return EIO; } } SC_DEBUG(sc_link, SDEV_DB2, ("scsi_cmd\n")); xs = get_xs(sc_link, flags); if (!xs) return (ENOMEM); /* * Fill out the scsi_xfer structure. We don't know whose context * the cmd is in, so copy it. */ bcopy(scsi_cmd, &(xs->cmdstore), cmdlen); xs->flags = INUSE | flags; xs->sc_link = sc_link; xs->retries = retries; xs->timeout = timeout; xs->cmd = &xs->cmdstore; xs->cmdlen = cmdlen; xs->data = data_addr; xs->datalen = datalen; xs->resid = 0; xs->bp = bp; /*XXX*/ /*use constant not magic number */ if (datalen && ((caddr_t) data_addr < (caddr_t) KERNBASE)) { if (bp) { printf("Data buffered space not in kernel context\n"); #ifdef SCSIDEBUG show_scsi_cmd(xs); #endif /* SCSIDEBUG */ retval = EFAULT; goto bad; } #ifdef BOUNCE_BUFFERS xs->data = (caddr_t) vm_bounce_kva_alloc(btoc(datalen)); #else xs->data = malloc(datalen, M_TEMP, M_WAITOK); #endif /* I think waiting is ok *//*XXX */ switch ((int)(flags & (SCSI_DATA_IN | SCSI_DATA_OUT))) { case 0: printf("No direction flags, assuming both\n"); #ifdef SCSIDEBUG show_scsi_cmd(xs); #endif /* SCSIDEBUG */ case SCSI_DATA_IN | SCSI_DATA_OUT: /* weird */ case SCSI_DATA_OUT: bcopy(data_addr, xs->data, datalen); break; case SCSI_DATA_IN: bzero(xs->data, datalen); } } retry: xs->error = XS_NOERROR; #ifdef PARANOID if (datalen && ((caddr_t) xs->data < (caddr_t) KERNBASE)) { printf("It's still wrong!\n"); } #endif /*PARANOID*/ #ifdef SCSIDEBUG if (sc_link->flags & SDEV_DB3) show_scsi_xs(xs); #endif /* SCSIDEBUG */ /* * Do the transfer. If we are polling we will return: * COMPLETE, Was poll, and scsi_done has been called * TRY_AGAIN_LATER, Adapter short resources, try again * * if under full steam (interrupts) it will return: * SUCCESSFULLY_QUEUED, will do a wakeup when complete * TRY_AGAIN_LATER, (as for polling) * After the wakeup, we must still check if it succeeded * * If we have a bp however, all the error proccessing * and the buffer code both expect us to return straight * to them, so as soon as the command is queued, return */ retval = (*(sc_link->adapter->scsi_cmd)) (xs); switch (retval) { case SUCCESSFULLY_QUEUED: if (bp) { return 0; /* will sleep (or not) elsewhere */ } s = splbio(); while (!(xs->flags & ITSDONE)) { tsleep((caddr_t)xs, PRIBIO + 1, "scsicmd", 0); } splx(s); /* fall through to check success of completed command */ case COMPLETE: /* Polling command completed ok */ /*XXX*/ case HAD_ERROR: /* Polling command completed with error */ SC_DEBUG(sc_link, SDEV_DB3, ("back in cmd()\n")); if ((retval = sc_err1(xs)) == SCSIRET_DO_RETRY) goto retry; break; case TRY_AGAIN_LATER: /* adapter resource shortage */ SC_DEBUG(sc_link, SDEV_DB3, ("will try again \n")); /* should sleep 1 sec here */ if (xs->retries--) { xs->flags &= ~ITSDONE; goto retry; } default: retval = EIO; } /* * If we had to copy the data out of the user's context, * then do the other half (copy it back or whatever) * and free the memory buffer */ if (datalen && (xs->data != data_addr)) { switch ((int)(flags & (SCSI_DATA_IN | SCSI_DATA_OUT))) { case 0: case SCSI_DATA_IN | SCSI_DATA_OUT: /* weird */ case SCSI_DATA_IN: bcopy(xs->data, data_addr, datalen); break; } #ifdef BOUNCE_BUFFERS vm_bounce_kva_alloc_free((vm_offset_t) xs->data, btoc(datalen)); #else free(xs->data, M_TEMP); #endif } /* * we have finished with the xfer stuct, free it and * check if anyone else needs to be started up. */ bad: s = splbio(); free_xs(xs, sc_link, flags); /* includes the 'start' op */ splx(s); if (bp && retval) { bp->b_error = retval; bp->b_flags |= B_ERROR; biodone(bp); } return (retval); } static errval sc_done(struct scsi_xfer *xs, int code) { /* * If it has a buf, we might be working with * a request from the buffer cache or some other * piece of code that requires us to process * errors at interrupt time. We have probably * been called by scsi_done() */ struct buf *bp; if (code == SCSIRET_DO_RETRY) { if (xs->retries--) { xs->error = XS_NOERROR; xs->flags &= ~ITSDONE; return SCSIRET_DO_RETRY; } code = EIO; /* Too many retries */ } /* * an EOF condition results in a VALID resid.. */ if(xs->flags & SCSI_EOF) { xs->resid = xs->datalen; xs->flags |= SCSI_RESID_VALID; } bp = xs->bp; if (code != ESUCCESS) { if (bp) { bp->b_error = 0; bp->b_flags |= B_ERROR; bp->b_error = code; bp->b_resid = bp->b_bcount; SC_DEBUG(xs->sc_link, SDEV_DB3, ("scsi_interpret_sense (bp) returned %d\n", code)); } else { SC_DEBUG(xs->sc_link, SDEV_DB3, ("scsi_interpret_sense (no bp) returned %d\n", code)); } } else { if (bp) { bp->b_error = 0; /* XXX: We really shouldn't need this SCSI_RESID_VALID flag. * If we initialize it to 0 and only touch it if we have * a value then we can leave out the test. */ if (xs->flags & SCSI_RESID_VALID) { bp->b_resid = xs->resid; bp->b_flags |= B_ERROR; } else { bp->b_resid = 0; } } } return code; } /* * submit a scsi command, given the command.. used for retries * and callable from timeout() */ #ifdef NOTYET errval scsi_submit(xs) struct scsi_xfer *xs; { struct scsi_link *sc_link = xs->sc_link; int retval; retval = (*(sc_link->adapter->scsi_cmd)) (xs); return retval; } /* * Retry a scsi command, given the command, and a delay. */ errval scsi_retry(xs,delay) struct scsi_xfer *xs; int delay; { if(delay) { timeout(((void())*)scsi_submit,xs,hz*delay); return(0); } else { return(scsi_submit(xs)); } } #endif /* * handle checking for errors.. * called at interrupt time from scsi_done() and * at user time from scsi_scsi_cmd(), depending on whether * there was a bp (basically, if there is a bp, there may be no * associated process at the time. (it could be an async operation)) * lower level routines shouldn't know about xs->bp.. we are the lowest. */ static errval sc_err1(xs) struct scsi_xfer *xs; { SC_DEBUG(xs->sc_link, SDEV_DB3, ("sc_err1,err = 0x%lx \n", xs->error)); switch ((int)xs->error) { case XS_SENSE: return sc_done(xs, scsi_interpret_sense(xs)); case XS_NOERROR: return sc_done(xs, ESUCCESS); case XS_BUSY: /* should somehow arange for a 1 sec delay here (how?)[jre] * tsleep(&localvar, priority, "foo", hz); * that's how! [unknown] * no, we could be at interrupt context.. use * timeout(scsi_resubmit,xs,hz); [jre] (not implimenteed yet) */ DELAY(1000); case XS_TIMEOUT: return sc_done(xs, SCSIRET_DO_RETRY); /* fall through */ case XS_SELTIMEOUT: case XS_DRIVER_STUFFUP: return sc_done(xs, EIO); default: sc_print_addr(xs->sc_link); printf("unknown error category from scsi driver\n"); return sc_done(xs, EIO); } } #ifdef notyet static int scsi_sense_qualifiers(xs, asc, ascq) struct scsi_xfer *xs; int *asc; int *ascq; { struct scsi_sense_data_new *sense; struct scsi_sense_extended *ext; sense = (struct scsi_sense_data_new *)&(xs->sense); ext = &(sense->ext.extended); if (ext->extra_len < 5) return 0; *asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0; *ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0; return 1; } #endif /* * scsi_sense_print will decode the sense data into human * readable form. Sense handlers can use this to generate * a report. This NOW DOES send the closing "\n". */ void scsi_sense_print(xs) struct scsi_xfer *xs; { struct scsi_sense_data_new *sense; struct scsi_sense_extended *ext; u_int32_t key; u_int32_t info; int asc, ascq; /* This sense key text now matches what is in the SCSI spec * (Yes, even the capitals) * so that it is easier to look through the spec to find the * appropriate place. */ static char *sense_key_text[] = { "NO SENSE", "RECOVERED ERROR", "NOT READY", "MEDIUM ERROR", "HARDWARE FAILURE", "ILLEGAL REQUEST", "UNIT ATTENTION", "DATA PROTECT", "BLANK CHECK", "Vendor Specific", "COPY ABORTED", "ABORTED COMMAND", "EQUAL", "VOLUME OVERFLOW", "MISCOMPARE", "RESERVED" }; sc_print_start(xs->sc_link); sense = (struct scsi_sense_data_new *)&(xs->sense); ext = &(sense->ext.extended); key = ext->flags & SSD_KEY; switch (sense->error_code & SSD_ERRCODE) { case 0x71: /* deferred error */ printf("Deferred Error: "); /* DROP THROUGH */ case 0x70: printf("%s", sense_key_text[key]); info = ntohl(*((long *) ext->info)); if (sense->error_code & SSD_ERRCODE_VALID) { switch ((int)key) { case 0x2: /* NOT READY */ case 0x5: /* ILLEGAL REQUEST */ case 0x6: /* UNIT ATTENTION */ case 0x7: /* DATA PROTECT */ break; case 0x8: /* BLANK CHECK */ printf(" req sz: %ld (decimal)", info); break; default: if (info) { if (sense->ext.extended.flags & SSD_ILI) { printf(" ILI (length mismatch): %ld", info); } else { printf(" info:%#lx", info); } } } } else if (info) printf(" info?:%#lx", info); if (ext->extra_len >= 4) { if (bcmp(ext->cmd_spec_info, "\0\0\0\0", 4)) { printf(" csi:%x,%x,%x,%x", ext->cmd_spec_info[0], ext->cmd_spec_info[1], ext->cmd_spec_info[2], ext->cmd_spec_info[3]); } } asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0; ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0; if (asc || ascq) { char *desc = scsi_sense_desc(asc, ascq); printf(" asc:%x,%x", asc, ascq); if (strlen(desc) > 40) sc_print_addr(xs->sc_link);; printf(" %s", desc); } if (ext->extra_len >= 7 && ext->fru) { printf(" field replaceable unit: %x", ext->fru); } if (ext->extra_len >= 10 && (ext->sense_key_spec_1 & SSD_SCS_VALID)) { printf(" sks:%x,%x", ext->sense_key_spec_1, (ext->sense_key_spec_2 | ext->sense_key_spec_3)); } break; /* * Not code 70, just report it */ default: printf("error code %d", sense->error_code & SSD_ERRCODE); if (sense->error_code & SSD_ERRCODE_VALID) { printf(" at block no. %ld (decimal)", (((unsigned long)sense->ext.unextended.blockhi) << 16) + (((unsigned long)sense->ext.unextended.blockmed) << 8) + ((unsigned long)sense->ext.unextended.blocklow)); } } printf("\n"); sc_print_finish(); } /* * Look at the returned sense and act on the error, determining * the unix error number to pass back. (0 = report no error) * * THIS IS THE DEFAULT SENSE HANDLER */ static errval scsi_interpret_sense(xs) struct scsi_xfer *xs; { struct scsi_sense_data_new *sense; struct scsi_sense_extended *ext; struct scsi_link *sc_link = xs->sc_link; u_int32_t key; u_int32_t silent; errval errcode; int error_code, asc, ascq; /* * If the flags say errs are ok, then always return ok. * XXX: What if it is a deferred error? */ if (xs->flags & SCSI_ERR_OK) return (ESUCCESS); sense = (struct scsi_sense_data_new *)&(xs->sense); ext = &(sense->ext.extended); #ifdef SCSIDEBUG if (sc_link->flags & SDEV_DB1) { u_int32_t count = 0; printf("code%x valid%x ", sense->error_code & SSD_ERRCODE, sense->error_code & SSD_ERRCODE_VALID ? 1 : 0); printf("seg%x key%x ili%x eom%x fmark%x\n", ext->segment, ext->flags & SSD_KEY, ext->flags & SSD_ILI ? 1 : 0, ext->flags & SSD_EOM ? 1 : 0, ext->flags & SSD_FILEMARK ? 1 : 0); printf("info: %x %x %x %x followed by %d extra bytes\n", ext->info[0], ext->info[1], ext->info[2], ext->info[3], ext->extra_len); printf("extra: "); while (count < ext->extra_len) { printf("%x ", ext->extra_bytes[count++]); } printf("\n"); } #endif /*SCSIDEBUG */ /* * If the device has it's own sense handler, call it first. * If it returns a legit errno value, return that, otherwise * it should return either DO_RETRY or CONTINUE to either * request a retry or continue with default sense handling. */ if (sc_link->device->err_handler) { SC_DEBUG(sc_link, SDEV_DB2, ("calling private err_handler()\n")); errcode = (*sc_link->device->err_handler) (xs); SC_DEBUG(sc_link, SDEV_DB2, ("private err_handler() returned %d\n",errcode)); if (errcode >= 0) { SC_DEBUG(sc_link, SDEV_DB2, ("SCSI_EOF = %d\n",(xs->flags & SCSI_EOF)?1:0)); SC_DEBUG(sc_link, SDEV_DB2, ("SCSI_RESID_VALID = %d\n", (xs->flags & SCSI_RESID_VALID)?1:0)); if(xs->flags & SCSI_EOF) { xs->resid = xs->datalen; xs->flags |= SCSI_RESID_VALID; } return errcode; /* valid errno value */ } switch(errcode) { case SCSIRET_DO_RETRY: /* Requested a retry */ return errcode; case SCSIRET_CONTINUE: /* Continue with default sense processing */ break; default: sc_print_addr(xs->sc_link); printf("unknown return code %d from sense handler.\n", errcode); return errcode; } } /* otherwise use the default */ silent = xs->flags & SCSI_SILENT; key = ext->flags & SSD_KEY; error_code = sense->error_code & SSD_ERRCODE; asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0; ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0; /* * Retry while the device is returning a ``Logical unit * is in the process of becoming ready.'' (until it either * eventually yields an error, or finally succeeds). */ if (error_code == 0x70 /* current error */ && (int)key == 0x2 /* not ready */ && asc == 4 && ascq == 1 /* logical unit i i t p o b r */) return (SCSIRET_DO_RETRY); if (!silent) { scsi_sense_print(xs); } switch (error_code) { case 0x71: /* deferred error */ /* Print even if silent (not silent was already done) */ if (silent) { scsi_sense_print(xs); } /* XXX: * This error doesn't relate to the command associated * with this request sense. A deferred error is an error * for a command that has already returned GOOD status (see 7.2.14.2). * * By my reading of that section, it looks like the current command * has been cancelled, we should now clean things up (hopefully * recovering any lost data) and then * retry the current command. There are two easy choices, both * wrong: * 1. Drop through (like we had been doing), thus treating this as * if the error were for the current command and return and stop * the current command. * 2. Issue a retry (like I made it do) thus hopefully recovering * the current transfer, and ignoring the fact that we've dropped * a command. * * These should probably be handled in a device specific * sense handler or punted back up to a user mode daemon */ return SCSIRET_DO_RETRY; /* * If it's code 70, use the extended stuff and interpret the key */ case 0x70: switch ((int)key) { case 0x0: /* NO SENSE */ case 0x1: /* RECOVERED ERROR */ case 0xc: /* EQUAL */ if(xs->flags & SCSI_EOF) { xs->resid = xs->datalen; xs->flags |= SCSI_RESID_VALID; } return (ESUCCESS); case 0x2: /* NOT READY */ sc_link->flags &= ~SDEV_MEDIA_LOADED; return (EBUSY); case 0x5: /* ILLEGAL REQUEST */ return (EINVAL); case 0x6: /* UNIT ATTENTION */ sc_link->flags &= ~SDEV_MEDIA_LOADED; if (sc_link->flags & SDEV_OPEN) { return (EIO); } else { return 0; } case 0x7: /* DATA PROTECT */ return (EACCES); case 0xd: /* VOLUME OVERFLOW */ return (ENOSPC); case 0x8: /* BLANK CHECK */ xs->flags |= SCSI_EOF; /* force EOF on tape read */ return (ESUCCESS); default: return (EIO); } /* * Not code 70, return EIO */ default: return (EIO); } } /* * Utility routines often used in SCSI stuff */ /* * convert a physical address to 3 bytes, * MSB at the lowest address, * LSB at the highest. */ void scsi_uto3b(val, bytes) u_int32_t val; u_char *bytes; { *bytes++ = (val & 0xff0000) >> 16; *bytes++ = (val & 0xff00) >> 8; *bytes = val & 0xff; } u_int32_t scsi_3btou(bytes) u_char *bytes; { u_int32_t rc; rc = (*bytes++ << 16); rc += (*bytes++ << 8); rc += *bytes; return rc; } int32_t scsi_3btoi(bytes) u_char *bytes; { u_int32_t rc = scsi_3btou(bytes); if (rc & 0x00800000) rc |= 0xff000000; return (int32_t) rc; } void scsi_uto2b(val, bytes) u_int32_t val; u_char *bytes; { *bytes++ = (val & 0xff00) >> 8; *bytes = val & 0xff; } u_int32_t scsi_2btou(bytes) u_char *bytes; { u_int32_t rc; rc = (*bytes++ << 8); rc += *bytes; return rc; } void scsi_uto4b(val, bytes) u_int32_t val; u_char *bytes; { *bytes++ = (val & 0xff000000) >> 24; *bytes++ = (val & 0xff0000) >> 16; *bytes++ = (val & 0xff00) >> 8; *bytes = val & 0xff; } u_int32_t scsi_4btou(bytes) u_char *bytes; { u_int32_t rc; rc = (*bytes++ << 24); rc += (*bytes++ << 16); rc += (*bytes++ << 8); rc += *bytes; return rc; } static sc_printing; void sc_print_init() { sc_printing++; } void sc_print_start(sc_link) struct scsi_link *sc_link; { sc_print_addr(sc_link); sc_printing++; } void sc_print_finish() { sc_printing--; } static void id_put(int id, char *after) { switch(id) { case SCCONF_UNSPEC: break; case SCCONF_ANY: printf("?"); break; default: printf("%d", id); break; } printf("%s", after); } /* * sc_print_addr: Print out the scsi_link structure's address info. * This should handle any circumstance, even the transitory ones * during system configuration. */ void sc_print_addr(sc_link) struct scsi_link *sc_link; { if (sc_printing) printf("\n"); if (sc_link->device == 0) { printf("nodevice at "); } else if (strcmp(sc_link->device->name, "probe") != 0) { printf("%s", sc_link->device->name); id_put(sc_link->dev_unit, ": "); return; } printf("scbus"); id_put(sc_link->scsibus, " "); printf("target "); id_put(sc_link->target, " "); printf("lun "); id_put(sc_link->lun, ": "); } #ifdef SCSIDEBUG /* * Given a scsi_xfer, dump the request, in all it's glory */ static void show_scsi_xs(xs) struct scsi_xfer *xs; { printf("xs(%p): ", xs); printf("flg(0x%lx)", xs->flags); printf("sc_link(%p)", xs->sc_link); printf("retr(0x%x)", xs->retries); printf("timo(0x%lx)", xs->timeout); printf("cmd(%p)", xs->cmd); printf("len(0x%lx)", xs->cmdlen); printf("data(%p)", xs->data); printf("len(0x%lx)", xs->datalen); printf("res(0x%lx)", xs->resid); printf("err(0x%lx)", xs->error); printf("bp(%p)", xs->bp); show_scsi_cmd(xs); } void show_scsi_cmd(struct scsi_xfer *xs) { u_char *b = (u_char *) xs->cmd; int i = 0; sc_print_addr(xs->sc_link); printf("command: "); if (!(xs->flags & SCSI_RESET)) { while (i < xs->cmdlen) { if (i) printf(","); printf("%x", b[i++]); } printf("-[%ld bytes]\n", xs->datalen); if (xs->datalen) show_mem(xs->data, min(64, xs->datalen)); } else { printf("-RESET-\n"); } } static void show_mem(address, num) unsigned char *address; u_int32_t num; { u_int32_t y; printf("------------------------------"); for (y = 0; y < num; y += 1) { if (!(y % 16)) printf("\n%03ld: ", y); printf("%02x ", *address++); } printf("\n------------------------------\n"); } #endif /*SCSIDEBUG */