From 10bfdf2baea89fcdacdaa2fbc6707dbee8e834fa Mon Sep 17 00:00:00 2001 From: "Jordan K. Hubbard" Date: Sat, 31 Dec 1994 05:31:48 +0000 Subject: [PATCH] From: "Serge V.Vakulenko" This is new version of Seagate ST01/02, Future Domain TMC-885, TMC-950 SCSI driver for FreeBSD. I started from the 2.0R version and mostly rewrote it. New features are: 1) New probe algorithm. Old driver read the BIOS region of the adapter memory and find the copyright string. The problem was in the BIOS itself: it conflicted with IDE disks. The solution was to unplug it and make the probe algorithm to work without it. 2) Proper timeout handling in numerous places where the driver polls waiting for some event. 3) Assembler flagments added in critical places, mostly for data transfer to of from the target. It was possible to make it faster, but at the price of decreasing reliability. 4) Target-dependent delays when waiting for REQ deassert event. Some devices seem to be slower (CD-ROMS, some tape drives), and some seem to be too fast (disks). The driver tests the REQ deassert timeout for each target and then uses it for polling. 5) Device flags added for SCSI parity control and sense request priority control. 6) Generic cleanup, after which the driver became much more readable (at least by me:). 7) Target data parity error logging is limited to avoid log file overflow. 8) Manual page added. Submitted by: serge --- sys/i386/isa/seagate.c | 3081 +++++++++++++++++----------------------- 1 file changed, 1267 insertions(+), 1814 deletions(-) diff --git a/sys/i386/isa/seagate.c b/sys/i386/isa/seagate.c index cc497478f87..1017ce56bce 100644 --- a/sys/i386/isa/seagate.c +++ b/sys/i386/isa/seagate.c @@ -3,9 +3,10 @@ * Julians SCSI-code * * Copyright 1994, Kent Palmkvist (kentp@isy.liu.se) - * Copyright 1994, Robert Knier (rknier@qgraph.com) + * Copyright 1994, Robert Knier (rknier@qgraph.com) * Copyright 1992, 1994 Drew Eckhardt (drew@colorado.edu) * Copyright 1994, Julian Elischer (julian@tfs.com) + * Copyright 1994, Serge Vakulenko (vak@cronyx.ru) * * Others that has contributed by example code is * Glen Overby (overby@cray.com) @@ -35,23 +36,24 @@ */ /* - * * kentp 940307 alpha version based on newscsi-03 version of Julians SCSI-code * kentp 940314 Added possibility to not use messages - * rknier 940331 Added fast transfer code - * rknier 940407 Added assembler coded data transfers + * rknier 940331 Added fast transfer code + * rknier 940407 Added assembler coded data transfers + * vak 941226 New probe algorithm, based on expected behaviour + * instead of BIOS signatures analysis, better timeout handling, + * new asm fragments for data input/output, target-dependent + * delays, device flags, polling mode, generic cleanup * - * $Id: seagate.c,v 1.2 1994/10/27 05:23:09 phk Exp $ + * $Id: seagate.c,v 1.3 1994/06/16 13:26:14 sean Exp $ */ /* * What should really be done: - * - * Add missing tests for timeouts - * Restructure interrupt enable/disable code (runs to long with int disabled) + * + * Restructure interrupt enable/disable code (runs too long with int disabled) * Find bug? giving problem with tape status * Add code to handle Future Domain 840, 841, 880 and 881 - * adjust timeouts (startup is very slow) * add code to use tagged commands in SCSI2 * Add code to handle slow devices better (sleep if device not disconnecting) * Fix unnecessary interrupts @@ -62,91 +64,76 @@ * the same number of heads/tracks/sectors as specified by the disk. * It is therefore important to look at what numbers DOS thinks the * disk has. Use these to disklabel your disk in an appropriate manner + * + * About ST02+IDE coexistence: the original Seagate ST02 + * BIOS cannot coexist with IDE or any other disk controller + * because it does not share BIOS disk drive numbers (80h, 81h) + * with others. New probing code allows using ST02 controller + * without BIOS: just unplug the ST02 BIOS chip from the board. + * + * Another problem is the floppy adapter on ST02 which could not be + * disabled by jumpers. I commonly use ST02 adapter as a cheap solution + * for atttaching the tape and CD-ROM drives, and an extra floppy controller + * is just a headache. I found a simple workaround: cutting off + * the AEN signal (A11 contact on ISA connector). AEN then goes high and + * disables the floppy adapter port address decoder. + * + * I also had a problem with ST02 conflicting with IDE during + * IDE data write phase. It seems than ST02 makes some noise + * on /IOW line. The /IOW line is used only for floppy controller + * part of ST02, and because I don't need it, I cut off the /IOW (contact B13) + * and it helped. (vak) + * + * Tested on the following hardware: + * Adapter: Seagate ST02 + * Disk: HP D1686 + * Streamers: Archive Viper 150, Wangtek 5525 + * CD-ROMs: Toshiba XM-3401, NEC CDR-25 + * + * Maximum data rate is about 270-280 kbytes/sec (on 386DX/40). + * (vak) */ - -#include -#ifdef KERNEL /* don't laugh.. look for main() */ +#undef DEBUG + #include "sea.h" +#if NSEA > 0 + +#include #include #include +#include #include #include #include #include #include #include -#include #include #include -#endif /* KERNEL */ + #include #include -#ifndef KERNEL -#define NSEA 1 -#endif /* !KERNEL */ +#ifdef DEBUG +# define PRINT(s) printf s +#else +# define PRINT(s) /*void*/ +#endif #define SEA_SCB_MAX 8 /* allow maximally 8 scsi control blocks */ #define SCB_TABLE_SIZE 8 /* start with 8 scb entries in table */ #define BLOCK_SIZE 512 /* size of READ/WRITE areas on SCSI card */ +#define SEA_SCSI_ADDR 7 /* address of the adapter on the SCSI bus */ /* - * defining PARITY causes parity data to be checked + * Defice config flags */ -#define PARITY 1 +#define FLAG_NOPARITY 0x01 /* disable SCSI bus parity check */ +#define FLAG_SENSEFIRST 0x02 /* place REQUEST_SENSE ops ahead of queue */ /* - * defining SEA_BLINDTRANSFER will make DATA IN and DATA OUT to be done with - * blind transfers, i.e. no check is done for scsi phase changes. This will - * result in data loss if the scsi device does not send its data using - * BLOCK_SIZE bytes at a time. - * If SEA_BLINDTRANSFER defined and SEA_ASSEMBLER also defined will result in - * the use of blind transfers coded in assembler. SEA_ASSEMBLER is no good - * without SEA_BLINDTRANSFER defined. + * Board CONTROL register */ -#define SEA_BLINDTRANSFER 1 /* do blind transfers */ -#define SEA_ASSEMBLER 1 /* Use assembly code for fast transfers */ - -/* - * defining SEANOMSGS causes messages not to be used (thereby disabling - * disconnects) - */ -/* #define SEANOMSGS 1 */ - -/* - * defining SEA_NODATAOUT makes dataout phase being aborted - */ -/* #define SEA_NODATAOUT 1 */ - -/* - * defining SEA_SENSEFIRST make REQUEST_SENSE opcode to be placed first - */ -/* #define SEA_SENSEFIRST 1 */ - -/* Debugging definitions. Should not be used unless you want a lot of - printouts even under normal conditions */ - -/* #define SEADEBUG 1 */ /* General info about errors */ -/* #define SEADEBUG1 1 */ /* Info about internal results and errors */ -/* #define SEADEBUG2 1 */ /* Display a lot about timeouts etc */ -/* #define SEADEBUG3 1 */ -/* #define SEADEBUG4 1 */ -/* #define SEADEBUG5 1 */ -/* #define SEADEBUG6 1 */ /* Display info about queue-lengths */ -/* #define SEADEBUG7 1 */ /* Extra check on STATUS before phase check */ -/* #define SEADEBUG8 1 */ /* Disregard non-BSY state in - sea_information_transfer */ -/* #define SEADEBUG9 1 */ /* Enable printouts */ -/* #define SEADEBUG11 1 */ /* stop everything except access to scsi id 1 */ -/* #define SEADEBUG15 1 */ /* Display every byte sent/received */ - -#define NUM_CONCURRENT 1 /* number of concurrent ops per board */ - -/******************************* board definitions **************************/ -/* - * CONTROL defines - */ - #define CMD_RST 0x01 /* scsi reset */ #define CMD_SEL 0x02 /* scsi select */ #define CMD_BSY 0x04 /* scsi busy */ @@ -157,9 +144,8 @@ #define CMD_DRVR_ENABLE 0x80 /* scsi enable */ /* - * STATUS + * Board STATUS register */ - #define STAT_BSY 0x01 /* scsi busy */ #define STAT_MSG 0x02 /* scsi msg */ #define STAT_IO 0x04 /* scsi I/O */ @@ -168,54 +154,47 @@ #define STAT_SEL 0x20 /* scsi select */ #define STAT_PARITY 0x40 /* parity error bit */ #define STAT_ARB_CMPL 0x80 /* arbitration complete bit */ +#define STAT_BITS "\20\1bsy\2msg\3i/o\4c/d\5req\6sel\7parity\10arb" /* - * REQUESTS + * SCSI bus requests */ - -#define REQ_MASK (STAT_CD | STAT_IO | STAT_MSG) -#define REQ_DATAOUT 0 -#define REQ_DATAIN STAT_IO -#define REQ_CMDOUT STAT_CD -#define REQ_STATIN (STAT_CD | STAT_IO) -#define REQ_MSGOUT (STAT_MSG | STAT_CD) -#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO) +#define REQ_MASK (STAT_MSG | STAT_CD | STAT_IO) +#define REQ_DATAOUT 0 +#define REQ_DATAIN STAT_IO +#define REQ_CMDOUT STAT_CD +#define REQ_STATIN (STAT_CD | STAT_IO) +#define REQ_MSGOUT (STAT_MSG | STAT_CD) +#define REQ_MSGIN (STAT_MSG | STAT_CD | STAT_IO) #define REQ_UNKNOWN 0xff -#define SEAGATERAMOFFSET 0x00001800 +static char *sea_phase_name[] = { + "DATAOUT", "Phase1?", "Phase2?", "Phase3?", + "DATAIN", "Phase5?", "Phase6?", "Phase7?", + "CMDOUT", "Phase9?", "MSGOUT", "Phase11?", + "STATIN", "Phase13?", "MSGIN", "Phase15?", +}; -#ifdef PARITY - #define BASE_CMD (CMD_EN_PARITY | CMD_INTR) -#else - #define BASE_CMD (CMD_INTR) -#endif - -#define SEAGATE 1 -#define FD 2 - -/****************************************************************************** - * This should be placed in a more generic file (presume in /sys/scsi) - * Message codes: +/* + * SCSI message codes */ -#define MSG_ABORT 0x06 -#define MSG_NOP 0x08 #define MSG_COMMAND_COMPLETE 0x00 -#define MSG_DISCONNECT 0x04 -#define MSG_IDENTIFY 0x80 -#define MSG_BUS_DEV_RESET 0x0c -#define MSG_MESSAGE_REJECT 0x07 #define MSG_SAVE_POINTERS 0x02 #define MSG_RESTORE_POINTERS 0x03 -/******************************************************************************/ +#define MSG_DISCONNECT 0x04 +#define MSG_ABORT 0x06 +#define MSG_MESSAGE_REJECT 0x07 +#define MSG_NOP 0x08 +#define MSG_BUS_DEV_RESET 0x0c +#define MSG_IDENTIFY(lun) (0xc0 | ((lun) & 0x7)) +#define MSG_ISIDENT(m) ((m) & 0x80) -#define IDENTIFY(can_disconnect,lun) (MSG_IDENTIFY | ((can_disconnect) ? \ - 0x40 : 0) | ((lun) & 0x07)) - -/* scsi control block used to keep info about a scsi command */ -struct sea_scb -{ - int flags; /* status of the instruction */ +/* + * SCSI control block used to keep info about a scsi command + */ +struct sea_scb { + int flags; /* status of the instruction */ #define SCB_FREE 0 #define SCB_ACTIVE 1 #define SCB_ABORTED 2 @@ -224,1791 +203,1265 @@ struct sea_scb #define SCB_TIMECHK 16 /* We have set a timeout on this one */ struct sea_scb *next; /* in free list */ struct scsi_xfer *xfer; /* the scsi_xfer for this cmd */ - u_char * data; /* position in data buffer so far */ + u_char *data; /* position in data buffer so far */ int32 datalen; /* bytes remaining to transfer */; }; +typedef enum { + CTLR_NONE, + CTLR_SEAGATE, + CTLR_FUTURE_DOMAIN, +} ctlr_t; + +char *sea_name[] = { + "Unknown", + "Seagate ST01/ST02", + "Future Domain TMC-885/TMC-950", +}; + /* - * data structure describing current status of the scsi bus. One for each + * Flags for waiting for REQ deassert during some SCSI bus phases. + */ +struct sea_phase { + unsigned cmdout1 : 1; /* after CMDOUT[0] byte */ + unsigned cmdout : 1; /* after CMDOUT[1..N] bytes */ + unsigned msgout : 1; /* after MSGOUT byte */ + unsigned statin : 1; /* after STATIN byte */ +}; + +/* + * Data structure describing the target state. + */ +struct sea_target { + struct sea_data *adapter; /* pointer to the adapter structure */ + volatile u_char busy; /* mask of busy luns at device target */ + u_long perrcnt; /* counter of target parity errors */ + struct sea_phase ndelay; /* "don't delay" flags */ + struct sea_phase init; /* "initialized" flags */ +}; + +/* + * Data structure describing current status of the scsi bus. One for each * controller card. */ -struct sea_data -{ - caddr_t basemaddr; /* Base address for card */ - char ctrl_type; /* FD or SEAGATE */ - caddr_t st0x_cr_sr; /* Address of control and status register */ - caddr_t st0x_dr; /* Address of data register */ - u_short vect; /* interrupt vector for this card */ - int our_id; /* our scsi id */ - int numscb; /* number of scsi control blocks */ +struct sea_data { + ctlr_t type; /* Seagate or Future Domain */ + volatile u_char *addr; /* base address for card */ + volatile u_char *CONTROL; /* address of control register */ + volatile u_char *STATUS; /* address of status register */ + volatile u_char *DATA; /* address of data register */ + + u_char scsi_addr; /* our scsi address, 0..7 */ + u_char scsi_id; /* our scsi id mask */ + u_char parity; /* parity flag: CMD_EN_PARITY or 0 */ + u_char irq; /* IRQ number used or 0 if no IRQ */ + unsigned sensefirst : 1; /* place REQUEST_SENSE ops ahead */ + unsigned timeout_active : 1; /* sea_timeout active (requested) */ + struct scsi_link sc_link; /* struct connecting different data */ struct sea_scb *connected; /* currently connected command */ struct sea_scb *issue_queue; /* waiting to be issued */ - struct sea_scb *disconnected_queue; /* waiting to reconnect */ + struct sea_scb *disconnected_queue; /* waiting to reconnect */ + + int numscb; /* number of scsi control blocks */ struct sea_scb scbs[SCB_TABLE_SIZE]; struct sea_scb *free_scb; /* free scb list */ - volatile unsigned char busy[8]; /* index=target, bit=lun, Keep track of - busy luns at device target */ -} *seadata[NSEA]; + struct sea_target target[8]; /* target state data */ +} seadata[NSEA]; -/* flag showing if main routine is running. */ -static volatile int main_running = 0; - -#define STATUS (*(volatile unsigned char *) sea->st0x_cr_sr) -#define CONTROL STATUS -#define DATA (*(volatile unsigned char *) sea->st0x_dr) +#define IS_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &\ + (1 << (b)->xfer->sc_link->lun)) +#define SET_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy |=\ + (1 << (b)->xfer->sc_link->lun)) +#define CLEAR_BUSY(a,b) ((a)->target[(b)->xfer->sc_link->target].busy &=\ + ~(1 << (b)->xfer->sc_link->lun)) /* - * These are "special" values for the tag parameter passed to sea_select - * Not implemented right now. + * Wait for condition, given as an boolean expression. + * Print the message on timeout (approx 10 msec). */ - -#define TAG_NEXT -1 /* Use next free tag */ -#define TAG_NONE -2 /* - * Establish I_T_L nexus instead of I_T_L_Q - * even on SCSI-II devices. - */ - -typedef struct { - char *signature ; - unsigned offset; - unsigned length; - unsigned char type; -} BiosSignature; +#define WAITFOR(condition,message) {\ + register long cnt = 100000; char *msg = message;\ + while (cnt-- && ! (condition)) continue;\ + if (cnt == -1 && msg)\ + printf ("sea: timeout waiting for %s\n", msg); } /* - * Signatures for automatic recognition of board type + * Seagate adapter does not support in hardware + * waiting for REQ deassert after transferring each data byte. + * We must do it in software. + * The problem is that some SCSI devices deassert REQ so fast that + * we can miss it. We the flag for each target sayind if we should (not) + * wait for REQ deassert. This flag is initialized when the first + * operation on the target is done. + * 1) Test if we don't need to wait for REQ deassert (`nodelay' flag). + * Initially the flag is off, i.e. wait. If the flag is set, + * go to the step 4. + * 2) Wait for REQ deassert (call sea_wait_for_req_deassert function). + * If REQ deassert got, go to the step 4. If REQ did not cleared + * during timeout period, go to the next step. + * 3) If `nodelay' flag did not initialized yet (`init' flag), + * then set `ndelay' flag. + * 4) Set `init' flag. Done. */ +#define WAITREQ(t,op,cnt) {\ + if (! t->ndelay.op &&\ + ! sea_wait_for_req_deassert (t->adapter, cnt, #op) &&\ + ! t->init.op)\ + t->ndelay.op = 1;\ + t->init.op = 1; } -static const BiosSignature signatures[] = { -{"ST01 v1.7 (C) Copyright 1987 Seagate", 15, 37, SEAGATE}, -{"SCSI BIOS 2.00 (C) Copyright 1987 Seagate", 15, 40, SEAGATE}, +int sea_probe (struct isa_device *dev); +int sea_detect (struct sea_data *sea, struct isa_device *dev); +int sea_attach (struct isa_device *dev); +int seaintr (int unit); +int32 sea_scsi_cmd (struct scsi_xfer *xs); +u_int32 sea_adapter_info (int unit); +void sea_timeout (void *scb); +void seaminphys (struct buf *bp); +void sea_done (int unit, struct sea_scb *scb); +struct sea_scb *sea_get_scb (int unit, int flags); +void sea_free_scb (int unit, struct sea_scb *scb, int flags); +static void sea_start (void); +static void sea_information_transfer (struct sea_data *sea); +int sea_poll (struct scsi_xfer *xs); +int sea_init (struct sea_data *sea, struct isa_device *dev); +int sea_send_scb (struct sea_data *sea, struct sea_scb *scb); +int sea_reselect (struct sea_data *sea); +int sea_select (struct sea_data *sea, struct sea_scb *scb); +int sea_abort (int unit, struct sea_scb *scb); +void sea_msg_output (struct sea_data *sea, u_char msg); +u_char sea_msg_input (struct sea_data *sea); -/* - * The following two lines are NOT mistakes. One detects ROM revision - * 3.0.0, the other 3.2. Since seagate has only one type of SCSI adapter, - * and this is not going to change, the "SEAGATE" and "SCSI" together - * are probably "good enough" - */ - -{"SEAGATE SCSI BIOS ", 16, 17, SEAGATE}, -{"SEAGATE SCSI BIOS ", 17, 17, SEAGATE}, - - /* - * However, future domain makes several incompatible SCSI boards, so specific - * signatures must be used. - */ - - {"FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89", 5, 45, FD}, - {"FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89", 5, 46, FD}, - {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90",5, 47, FD}, - {"FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90",5, 47, FD}, - {"FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90", 5, 46, FD}, - {"FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92", 5, 44, FD}, - {"FUTURE DOMAIN TMC-950", 5, 21, FD}, - }; - -#define NUM_SIGNATURES (sizeof(signatures) / sizeof(BiosSignature)) - -static const char * seagate_bases[] = { - (char *) 0xc8000, (char *) 0xca000, (char *) 0xcc000, - (char *) 0xce000, (char *) 0xdc000, (char *) 0xde000 -}; - -#define NUM_BASES (sizeof(seagate_bases)/sizeof(char *)) - -int sea_probe(struct isa_device *dev); -int sea_attach(struct isa_device *dev); -int seaintr(int unit); -int32 sea_scsi_cmd(struct scsi_xfer *xs); -void sea_timeout(caddr_t, int); -void seaminphys(struct buf *bp); -void sea_done(int unit, struct sea_scb *scb); -u_int32 sea_adapter_info(int unit); -struct sea_scb *sea_get_scb(int unit, int flags); -void sea_free_scb(int unit, struct sea_scb *scb, int flags); -static void sea_main(void); -static void sea_information_transfer(struct sea_data *sea); -int sea_poll(int unit, struct scsi_xfer *xs, struct sea_scb *scb); -int sea_init(int unit); -int sea_send_scb(struct sea_data *sea, struct sea_scb *scb); -int sea_reselect(struct sea_data *sea); -int sea_select(struct sea_data *sea, struct sea_scb *scb); -int sea_transfer_pio(struct sea_data *sea, u_char *phase, int32 *count, - u_char **data); -int sea_abort(int unit, struct sea_scb *scb); - -static sea_unit = 0; -static sea_slot = -1; /* last found board seagate_bases address index */ -#define FAIL 1 -#define SUCCESS 0 - -#ifdef KERNEL -struct scsi_adapter sea_switch = -{ - sea_scsi_cmd, - seaminphys, - 0, - 0, - sea_adapter_info, - "sea", - 0,0 +struct scsi_adapter sea_switch = { + sea_scsi_cmd, seaminphys, 0, 0, + sea_adapter_info, "sea", {0}, }; /* the below structure is so we have a default dev struct for our link struct */ -struct scsi_device sea_dev = -{ +struct scsi_device sea_dev = { NULL, /* use default error handler */ NULL, /* have a queue, served by this */ NULL, /* have no async handler */ NULL, /* Use default 'done' routine */ - "sea", - 0, - 0,0 + "sea", 0, {0}, }; -struct isa_driver seadriver = -{ - sea_probe, - sea_attach, - "sea" -}; +struct isa_driver seadriver = { sea_probe, sea_attach, "sea" }; -#endif /* KERNEL */ - -#ifdef SEADEBUG6 -void sea_queue_length() -{ - struct sea_scb *tmp; - int length = 0; - - if(seadata[0]->connected) - length = 1; - for(tmp = seadata[0]->issue_queue; tmp != NULL; tmp = tmp->next, length++); - for(tmp = seadata[0]->disconnected_queue ; tmp != NULL; tmp->next, length++); - printf("length:%d ",length); -} -#endif - -/***********************************************************************\ -* Check if the device can be found at the port given and if so, detect * -* the type of board. Set it up ready for further work. Takes the * -* isa_dev structure from autoconf as an argument. * -* Returns 1 if card recognized, 0 if errors * -\***********************************************************************/ -int -sea_probe(dev) -struct isa_device *dev; -{ - int j; - int unit = sea_unit; - struct sea_data *sea; - dev->id_unit = unit; - -#ifdef SEADEBUG2 - printf("sea_probe "); -#endif - - /* find unit and check we have that many defined */ - if(unit >= NSEA) { - printf("sea%d: unit number too high\n",unit); - return(0); - } - dev->id_unit = unit; -#ifdef SEADEBUG2 - printf("unit: %d\n",unit); - printf("dev_addr: 0x%lx\n",dev->id_maddr); -#endif - /* allocate a storage area for us */ - - if (seadata[unit]) { - printf("sea%d: memory already allocated\n", unit); - return(0); - } -#ifdef SEADEBUG2 - printf("Before malloc\n"); -#endif - sea = malloc(sizeof(struct sea_data), M_TEMP, M_NOWAIT); - if (!sea) { - printf("sea%d: cannot malloc!\n", unit); - return(0); - } - -#ifdef SEADEBUG2 - printf("after malloc\n"); - for(j=0;j<32767;j++); -#endif - bzero(sea,sizeof(struct sea_data)); - seadata[unit] = sea; - - /* check for address if no one specified */ - sea->basemaddr = NULL; - - /* Could try to find a board by looking through all possible addresses */ - /* This is not done the right way now, because I have not found a way */ - /* to get a boards virtual memory address given its physical. There is */ - /* a function that returns the physical address for a given virtual */ - /* address, but not the other way around */ - - if(dev->id_maddr == 0) { /* - for(sea_slot++;sea_slotbasemaddr && j < NUM_SIGNATURES; ++j) - if(!memcmp((void *)(seagate_bases[sea_slot]+signatures[j].offset), - (void *) signatures[j].signature, signatures[j].length)) { - sea->basemaddr = (void *)seagate_bases[sea_slot]; - break; + * Check if the device can be found at the port given and if so, + * detect the type of board. Set it up ready for further work. + * Takes the isa_dev structure from autoconf as an argument. + * Returns 1 if card recognized, 0 if errors. + */ +int sea_probe (struct isa_device *dev) +{ + struct sea_data *sea = &seadata[dev->id_unit]; + static const addrtab[] = { + 0xc8000, 0xca000, 0xcc000, 0xce000, 0xdc000, 0xde000, 0, + }; + int i; + + dev->id_msize = 0x4000; + if (! dev->id_maddr) + for (i=0; addrtab[i]; ++i) { + dev->id_maddr = (u_char*) KERNBASE + addrtab[i]; + if (sea_detect (sea, dev)) + return (1); + } + else if (sea_detect (sea, dev)) + return (1); + sea->type = CTLR_NONE; + return (0); +} + +int sea_detect (struct sea_data *sea, struct isa_device *dev) +{ + sea->addr = dev->id_maddr; + + /* Try Seagate. */ + sea->type = CTLR_SEAGATE; + sea->CONTROL = sea->addr + 0x1a00; /* ST01/ST02 register offsets */ + sea->STATUS = sea->addr + 0x1a00; + sea->DATA = sea->addr + 0x1c00; + if (sea_init (sea, dev) == 0) + return (1); + + /* Try Future Domain. */ + sea->type = CTLR_FUTURE_DOMAIN; + sea->CONTROL = sea->addr + 0x1c00; /* TMC-885/TMC-950 reg. offsets */ + sea->STATUS = sea->addr + 0x1c00; + sea->DATA = sea->addr + 0x1e00; + if (sea_init (sea, dev) == 0) + return (1); + + return (0); +} + +/* + * Probe the adapter, and if found, + * reset the board and the scsi bus. + */ +int sea_init (struct sea_data *sea, struct isa_device *dev) +{ + volatile u_char *p; + u_char c; + int i; + + /* Check that STATUS..STATUS+200h are equal. */ + p = sea->STATUS; + c = *p; + if (c == 0xff) + return (2); + while (++p < sea->STATUS+0x200) + if (*p != c) + return (3); + + /* Check that DATA..DATA+200h are equal. */ + for (p=sea->DATA, c= *p++; pDATA+0x200; ++p) + if (*p != c) + return (4); + + /* Check that addr..addr+1800h are not writable. */ + for (p=sea->addr; paddr+0x1800; ++p) { + c = *p; + *p = ~c; + if (*p == ~c) { + *p = c; + return (5); + } } -*/ - } else { -#ifdef SEADEBUG2 - printf("id_maddr != 0\n"); - for(j = 0; j < 32767 ; j++); - for(j = 0; j < 32767 ; j++); -#endif - /* find sea_slot position for overridden memory address */ - for(j = 0; ((char *)vtophys(dev->id_maddr) != seagate_bases[j]) && - jid_maddr); - seadata[unit]=NULL; - free(sea, M_TEMP); - return(0); - } else if(sea_slot > j) { - printf("sea%d: board address 0x%lx already probed!\n", - unit, dev->id_maddr); - seadata[unit]=NULL; - free(sea, M_TEMP); - return(0); - } else { - sea->basemaddr = dev->id_maddr; - } + /* Check that addr+1800h..addr+1880h are writable. */ + for (p=sea->addr+0x1800; paddr+0x1880; ++p) { + c = *p; + *p = 0x55; + if (*p != 0x55) { + *p = c; + return (6); + } + *p = 0xaa; + if (*p != 0xaa) { + *p = c; + return (7); + } + } - } -#ifdef SEADEBUG2 - printf("sea->basemaddr = %lx\n", sea->basemaddr); -#endif - - /* check board type */ /* No way to define this through config */ - for(j = 0; j < NUM_SIGNATURES; j++) - if(!memcmp((void *) (sea->basemaddr + signatures[j].offset), - (void *) signatures[j].signature, signatures[j].length)) { - sea->ctrl_type = signatures[j].type; - break; - } - if(j == NUM_SIGNATURES) { -#ifdef SEADEBUG - printf("sea: Board type unknown at address 0x%lx\n", - sea->basemaddr); -#endif - seadata[unit]=NULL; - free(sea, M_TEMP); - return(0); - } + /* Parse device flags. */ + sea->parity = (dev->id_flags & FLAG_NOPARITY) ? 0 : CMD_EN_PARITY; - /* Find controller and data memory addresses */ - sea->st0x_cr_sr = (void *) (((unsigned char *) sea->basemaddr) + - ((sea->ctrl_type == SEAGATE) ? 0x1a00 : 0x1c00)); - sea->st0x_dr = (void *) (((unsigned char *) sea->basemaddr) + - ((sea->ctrl_type == SEAGATE) ? 0x1c00 : 0x1e00)); + /* Reset the scsi bus (I don't know if this is needed). */ + *sea->CONTROL = CMD_RST | CMD_DRVR_ENABLE; + /* Hold reset for at least 25 microseconds. */ + DELAY (25); + /* Check that status cleared. */ + if (*sea->STATUS != 0) { + *sea->CONTROL = 0; + return (8); + } - /* Test controller RAM (works the same way on future domain cards?) */ - *(sea->basemaddr + SEAGATERAMOFFSET) = 0xa5; - *(sea->basemaddr + SEAGATERAMOFFSET + 1) = 0x5a; + /* Check that DATA register is writable. */ + for (i=0; i<256; ++i) { + *sea->DATA = i; + if (*sea->DATA != i) { + *sea->CONTROL = 0; + return (9); + } + } - if((*(sea->basemaddr + SEAGATERAMOFFSET) != (char) 0xa5) || - (*(sea->basemaddr + SEAGATERAMOFFSET + 1) != (char) 0x5a)) { - printf("sea%d: Board RAM failure\n",unit); - } - - if(sea_init(unit) != 0) { - seadata[unit] = NULL; - free(sea,M_TEMP); - return(0); - } - - /* if its there put in it's interrupt vector */ - /* (Doesn't use dma, so no drq is set) */ - sea->vect = dev->id_irq; + /* Enable the adapter. */ + *sea->CONTROL = CMD_INTR | sea->parity; + /* Wait a Bus Clear Delay (800 ns + bus free delay 800 ns). */ + DELAY (10); - sea_unit++; - return(1); + /* Check that DATA register is NOT writable. */ + c = *sea->DATA; + for (i=0; i<256; ++i) { + *sea->DATA = i; + if (*sea->DATA != c) { + *sea->CONTROL = 0; + return (10); + } + } + + /* Init fields used by our routines */ + sea->sensefirst = (dev->id_flags & FLAG_SENSEFIRST) ? 1 : 0; + sea->scsi_addr = SEA_SCSI_ADDR; + sea->scsi_id = 1 << sea->scsi_addr; + sea->irq = dev->id_irq ? ffs (dev->id_irq) - 1 : 0; + sea->connected = 0; + sea->issue_queue = 0; + sea->disconnected_queue = 0; + for (i=0; i<8; i++) { + sea->target[i].adapter = sea; + sea->target[i].busy = 0; + } + + /* Link up the free list of scbs */ + sea->numscb = SCB_TABLE_SIZE; + sea->free_scb = sea->scbs; + for (i=1; iscbs[i-1].next = sea->scbs + i; + sea->scbs[SCB_TABLE_SIZE-1].next = 0; + + return (0); } -static struct kern_devconf kdc_sea[NSEA] = { { - 0, 0, 0, /* filled in by dev_attach */ - "sea", 0, { MDDT_ISA, 0, "bio" }, - isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, - &kdc_isa0, /* parent */ - 0, /* parentdata */ - DC_BUSY, /* host adaptors are always busy */ - "Seagate ST01/02 SCSI controller" -} }; +static char sea_description [80]; +static struct kern_devconf sea_kdc[NSEA] = {{ + 0, 0, 0, "sea", 0, { MDDT_ISA, 0, "bio" }, + isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, 0, + DC_BUSY, sea_description, +}}; -static inline void -sea_registerdev(struct isa_device *id) +/* + * Attach all sub-devices we can find. + */ +int sea_attach (struct isa_device *dev) { - if(id->id_unit) - kdc_sea[id->id_unit] = kdc_sea[0]; - kdc_sea[id->id_unit].kdc_unit = id->id_unit; - kdc_sea[id->id_unit].kdc_isa = id; - dev_attach(&kdc_sea[id->id_unit]); + int unit = dev->id_unit; + struct sea_data *sea = &seadata[unit]; + + sprintf (sea_description, "%s SCSI controller", sea_name[sea->type]); + printf ("\n"); + printf ("sea%d: type %s%s%s\n", unit, sea_name[sea->type], + (dev->id_flags & FLAG_NOPARITY) ? ", no parity" : "", + (dev->id_flags & FLAG_SENSEFIRST) ? ", sense ahead" : ""); + + /* fill in the prototype scsi_link */ + sea->sc_link.adapter_unit = unit; + sea->sc_link.adapter_targ = sea->scsi_addr; + sea->sc_link.adapter = &sea_switch; + sea->sc_link.device = &sea_dev; + + /* ask the adapter what subunits are present */ + scsi_attachdevs (&(sea->sc_link)); + + if (dev->id_unit) + sea_kdc[dev->id_unit] = sea_kdc[0]; + sea_kdc[dev->id_unit].kdc_unit = dev->id_unit; + sea_kdc[dev->id_unit].kdc_isa = dev; + dev_attach (&sea_kdc[dev->id_unit]); + return (1); } -/***********************************************\ -* Attach all sub-devices we can find * -\***********************************************/ -int -sea_attach(dev) - struct isa_device *dev; +/* + * Return some information to the caller about + * the adapter and its capabilities. + */ +u_int32 sea_adapter_info (int unit) { - int unit = dev->id_unit; - struct sea_data *sea = seadata[unit]; - -#ifdef SEADEBUG2 - printf("sea_attach called\n"); -#endif - - /* fill in the prototype scsi_link */ - sea->sc_link.adapter_unit = unit; - sea->sc_link.adapter_targ = sea->our_id; - sea->sc_link.adapter = &sea_switch; - sea->sc_link.device = &sea_dev; - printf("\n"); - /*****************************************************\ - * ask the adapter what subunits are present * - \*****************************************************/ - scsi_attachdevs(&(sea->sc_link)); - sea_registerdev(dev); - return 1; + return (1); } -/***********************************************\ -* Return some information to the caller about * -* the adapter and its capabilities * -\***********************************************/ -u_int32 -sea_adapter_info(unit) - int unit; +void seaminphys (struct buf *bp) { -#ifdef SEADEBUG2 - printf("sea_adapter_info called\n"); -#endif - return 1; } -/***********************************************\ -* Catch an interrupt from the adaptor * -\***********************************************/ -int -seaintr(unit) - int unit; +/* + * Catch an interrupt from the adaptor. + */ +int seaintr (int unit) { - int done; - struct sea_data *sea = seadata[unit]; - int oldpri; + struct sea_data *sea = &seadata[unit]; -#if SEADEBUG2 - printf(";"); -#endif - - do { - done = 1; - /* dispatch to appropriate routine if found and done=0 */ - /* should check to see that this card really caused the interrupt */ - if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { - /* Reselect interrupt */ -#ifdef SEADEBUG2 - printf(";2"); -#endif - done = 0; -/* enable_intr(); */ /* ?? How should this be done ?? */ - sea_reselect(sea); - } else if (STATUS & STAT_PARITY) { - /* Parity error interrupt */ -#ifdef SEADEBUG2 - printf(";3"); -#endif - printf("sea%d: PARITY interrupt\n", unit); - } else { -#ifdef SEADEBUG2 -/* printf("sea%d: unknown interrupt\n",unit); */ - printf(";4%x", STATUS); -#endif - } - if (!done) { - oldpri = splbio(); /* disable_intr(); */ - if (!main_running) { -#ifdef SEADEBUG2 - printf(";5"); -#endif - main_running = 1; - sea_main(); - /* main_running is cleared in sea_main once it can't - * do more work, and sea_main exits with interrupts - * disabled - */ - splx(oldpri); /* enable_intr(); */ - } else { - splx(oldpri); /* enable_intr(); */ - } - } - } while (!done); - return 1; -} - -/***********************************************\ -* Setup data structures, and reset the board * -* and the scsi bus * -\***********************************************/ -int -sea_init(unit) - int unit; -{ - long l; - int i; - struct sea_data *sea = seadata[unit]; - -#ifdef SEADEBUG2 - printf("sea_init called\n"); -#endif -/* Reset the scsi bus (I don't know if this is needed */ - CONTROL = BASE_CMD | CMD_DRVR_ENABLE | CMD_RST; - DELAY(25); /* hold reset for at least 25 microseconds */ - CONTROL = BASE_CMD; - DELAY(10); /* wait a Bus Clear Delay (800 ns + bus free delay (800 ns) */ - /* Set our id (don't know anything about this) */ - if(sea->ctrl_type == SEAGATE) - sea->our_id = 7; - else - sea->our_id = 6; - /* init fields used by our routines */ - sea->connected = NULL; - sea->issue_queue = NULL; - sea->disconnected_queue = NULL; - for (i=0; i<8 ; i++) - sea->busy[i] = 0; - - /* link up the free list of scbs */ - sea->numscb = SCB_TABLE_SIZE; - sea->free_scb = (struct sea_scb *) & (sea->scbs[0]); - for(i=1;i< SCB_TABLE_SIZE ; i++) { - sea->scbs[i-1].next = &(sea->scbs[i]); - } - sea->scbs[SCB_TABLE_SIZE - 1].next = NULL; - - return(0); -} - -/***********************************************\ -* * -\***********************************************/ -void seaminphys(bp) - struct buf *bp; -{ -#ifdef SEADEBUG2 -/* printf("seaminphys called\n"); */ - printf(","); -#endif -} - -/***********************************************\ -* start a scsi operation given the command and * -* the data address. Also needs the unit, target * -* and lu * -* get a free scb and set it up * -* call send_scb * -* either start timer or wait until done * -\***********************************************/ -int32 sea_scsi_cmd(xs) -struct scsi_xfer *xs; -{ - struct scsi_sense_data *s1, *s2; - struct sea_scb *scb; - int i = 0; - int flags; - int unit = xs->sc_link->adapter_unit; - struct sea_data *sea = seadata[unit]; - int s; - unsigned int stat; - int32 result; - -#ifdef SEADEBUG2 - /* printf("scsi_cmd\n"); */ - printf("="); -#endif - -#ifdef SEADEBUG11 - if(xs->sc_link->target != 1) { - xs->flags |= ITSDONE; - xs->error = XS_TIMEOUT; - return(HAD_ERROR); - } -#endif - - flags = xs->flags; - if(xs->bp) flags |= (SCSI_NOSLEEP); - if(flags & ITSDONE) { - printf("sea%d: Already done?", unit); - xs->flags &= ~ITSDONE; - } - if(!(flags & INUSE)) { - printf("sea%d: Not in use?", unit); - xs->flags |= INUSE; - } - if (!(scb = sea_get_scb(unit, flags))) { -#ifdef SEADEBUG2 - printf("=2"); -#endif - xs->error = XS_DRIVER_STUFFUP; - return(TRY_AGAIN_LATER); - } - - /* - * Put all the arguments for the xfer in the scb - */ - scb->xfer = xs; - scb->datalen = xs->datalen; - scb->data = xs->data; - - if(flags & SCSI_RESET) { - /* Try to send a reset command to the card. This is done by calling the - * Reset function. Should then return COMPLETE. Need to take care of the - * possible current connected command. - * Not implemented right now. - */ - printf("sea%d: Got a SCSI_RESET!\n",unit); - } - - /* setup the scb to contain necessary values */ - /* The interresting values can be read from the xs that is saved */ - /* I therefore think that the structure can be kept very small */ - /* the driver doesn't use DMA so the scatter/gather is not needed ? */ -#ifdef SEADEBUG6 - sea_queue_length(); -#endif - if (sea_send_scb(sea, scb) == 0) { -#ifdef SEADEBUG2 - printf("=3"); -#endif - xs->error = XS_DRIVER_STUFFUP; - sea_free_scb(unit, scb, flags); - return (TRY_AGAIN_LATER); - } - - /* - * Usually return SUCCESSFULLY QUEUED - */ - if (!(flags & SCSI_NOMASK)) { - if(xs->flags & ITSDONE) { /* timout timer not started, already finished */ - /* Tried to return COMPLETE but the machine hanged with this */ -#ifdef SEADEBUG2 - printf("=6"); -#endif - return(SUCCESSFULLY_QUEUED); - } - timeout((timeout_func_t)sea_timeout, (caddr_t)scb, (xs->timeout * hz)/1000); - scb->flags |= SCB_TIMECHK; -#ifdef SEADEBUG2 - printf("=4"); -#endif - return(SUCCESSFULLY_QUEUED); - } - - /* - * If we can't use interrupts, poll on completion - */ - - result = sea_poll(unit, xs, scb); -#ifdef SEADEBUG2 - printf("=5 %lx", result); -#endif - return result; + PRINT (("sea%d: interrupt status=%b\n", unit, *sea->STATUS, STAT_BITS)); + while ((*sea->STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { + /* Reselect interrupt */ + sea_reselect (sea); + sea_start (); + } + return (1); } /* * Get a free scb. If there are none, see if we can allocate a new one. If so, * put it in the hash table too, otherwise return an error or sleep. */ - -struct sea_scb * -sea_get_scb(unit, flags) - int unit; - int flags; +struct sea_scb *sea_get_scb (int unit, int flags) { - struct sea_data *sea = seadata[unit]; - unsigned opri = 0; - struct sea_scb * scbp; - int hashnum; + struct sea_data *sea = &seadata[unit]; + struct sea_scb *scbp; + int x = 0; -#ifdef SEADEBUG2 -/* printf("get_scb\n"); */ - printf("("); -#endif + if (! (flags & SCSI_NOMASK)) + x = splbio (); - if (!(flags & SCSI_NOMASK)) - opri = splbio(); - -#ifdef SEADEBUG3 - printf("(2 %lx ", sea->free_scb); -#endif - - /* - * If we can and have to, sleep waiting for one to come free - * but only if we canīt allocate a new one. - */ - while (!(scbp = sea->free_scb)) { -#ifdef SEADEBUG12 - printf("(3"); -#endif - if (sea->numscb < SEA_SCB_MAX) { - printf("malloced new scbs\n"); - if (scbp = (struct sea_scb *) malloc(sizeof(struct sea_scb), - M_TEMP, M_NOWAIT)) { - bzero(scbp, sizeof(struct sea_scb)); - sea->numscb++; - scbp->flags = SCB_ACTIVE; - scbp->next = NULL; - } else { - printf("sea%d: Can't malloc SCB\n",unit); - } - goto gottit; - } else { -#ifdef SEADEBUG12 - printf("(4"); -#endif - if(!(flags & SCSI_NOSLEEP)) { -#ifdef SEADEBUG2 - printf("(5"); -#endif - tsleep(&sea->free_scb, PRIBIO, "seascb", 0); - } - } - } - if (scbp) { -#ifdef SEADEBUG2 - printf("(6"); -#endif - /* Get SCB from free list */ - sea->free_scb = scbp->next; - scbp->next = NULL; - scbp->flags = SCB_ACTIVE; - } - gottit: - if (!(flags & SCSI_NOMASK)) - splx(opri); - - return(scbp); -} - -/* - * sea_send_scb - * - * Try to send this command to the board. Because this board does not use any - * mailboxes, this routine simply adds the command to the queue held by the - * sea_data structure. - * A check is done to see if the command contains a REQUEST_SENSE command, and - * if so the command is put first in the queue, otherwise the command is added - * to the end of the queue. ?? Not correct ?? - */ -int -sea_send_scb(struct sea_data *sea, struct sea_scb *scb) -{ - struct sea_scb *tmp; - int oldpri = 0; - -#ifdef SEADEBUG2 - printf("+"); -#endif - - if(!(scb->xfer->flags & SCSI_NOSLEEP)) { - oldpri = splbio(); - } - - /* add to head of queue if queue empty or command is REQUEST_SENSE */ - - if (!(sea->issue_queue) -#ifdef SEA_SENSEFIRST - || (scb->xfer->cmd->opcode == (u_char) REQUEST_SENSE) -#endif - ) { -#ifdef SEADEBUG2 - printf("+2"); -#endif - scb->next = sea->issue_queue; - sea->issue_queue = scb; - } else { -#ifdef SEADEBUG2 - printf("+3"); -#endif - for (tmp = sea->issue_queue; tmp->next; tmp = tmp->next); - tmp->next = scb; - scb->next = NULL; /* placed at the end of the queue */ - } - /* Try to do some work on the card */ - if (!main_running) { - main_running = 1; - sea_main(); - /* main running is cleared in sea_main once it can't - * do more work, and sea_main exits with interrupts - * disabled - */ - } - if(!(scb->xfer->flags & SCSI_NOSLEEP)) { - splx(oldpri); - } - return (1); /* No possible errors right now */ -} - -/* - * sea_main(void) - * - * corroutine that runs as long as more work can be done on the seagate host - * adapter in a system. Both sea_scsi_cmd and sea_intr will try to start it in - * case it is not running. - */ - -static void sea_main(void) -{ - struct sea_data *sea; /* This time we look at all cards */ - struct sea_scb *tmp, *prev; - int done; - int unit; - int oldpri; - -#ifdef SEADEBUG2 - printf("."); -#endif - - /* - * This should not be run with interrupts disabled, but use the splx code - * instead - */ - do { - done = 1; - for (sea=seadata[unit=0]; (unit < NSEA) && seadata[unit] ; - sea=seadata[++unit]) { - oldpri = splbio(); - if (!sea->connected) { -#ifdef SEADEBUG2 - printf(".2"); -#endif /* - * Search through the issue_queue for a command destined for a - * target that's not busy. + * If we can and have to, sleep waiting for one to come free + * but only if we can't allocate a new one. */ - for (tmp = sea->issue_queue, prev = NULL; tmp ; - prev = tmp, tmp = tmp->next) - /* When we find one, remove it from the issue queue. */ - if (!(sea->busy[tmp->xfer->sc_link->target] & - (1 << tmp->xfer->sc_link->lun))) { - if (prev) - prev->next = tmp->next; - else - sea->issue_queue = tmp->next; - tmp->next = NULL; - - /* re-enable interrupts after finding one */ - splx(oldpri); - - /* - * Attempt to establish an I_T_L nexus here. - * On success, sea->connected is set. - * On failure, we must add the command back to - * the issue queue so we can keep trying. - */ -#ifdef SEADEBUG2 - printf(".3"); -#endif - - /* REQUEST_SENSE commands are issued without tagged - * queueing, even on SCSI-II devices because the - * contingent alligence condition exists for the - * entire unit. - */ - - /* First check that if any device has tried a reconnect while - * we have done other things with interrupts disabled - */ - - if ((STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { -#ifdef SEADEBUG2 - printf(".7"); -#endif - sea_reselect(sea); - break; - } - if (!sea_select(sea, tmp)) { -#ifdef SEADEBUG2 - /* printf("Select returned ok\n"); */ - printf(".4"); -#endif - break; - } else { - oldpri = splbio(); - tmp->next = sea->issue_queue; - sea->issue_queue = tmp; - splx(oldpri); - printf("sea_main: select failed\n"); - } - } /* if target/lun is not busy */ - } /* if (!sea->connected) */ - - if (sea->connected) { /* we are connected. Do the task */ - splx(oldpri); -#ifdef SEADEBUG2 -/* printf("sea_main: starting information transfer!\n"); */ - printf(".5"); -#endif - sea_information_transfer(sea); -#ifdef SEADEBUG2 -/* printf("sea_main: sea->connected:%lx\n", sea->connected); */ - printf(".6%lx ", sea->connected); -#endif - done = 0; - } else - break; - } /* for instance */ - } while (!done); - main_running = 0; -} - -void -sea_free_scb(unit, scb, flags) - int unit; - struct sea_scb *scb; - int flags; -{ - struct sea_data *sea = seadata[unit]; - unsigned int opri = 0; - -#ifdef SEADEBUG2 -/* printf("free_scb\n"); */ - printf(")"); -#endif - - if(!(flags & SCSI_NOMASK)) - opri = splbio(); - - scb->next = sea->free_scb; - sea->free_scb = scb; - scb->flags = SCB_FREE; - /* - * If there were none, wake anybody waiting for one to come free, - * starting with queued entries. - */ - if(!scb->next) { -#ifdef SEADEBUG2 -/* printf("free_scb waking up sleep\n"); */ - printf(")2"); -#endif - wakeup((caddr_t)&sea->free_scb); - } - - if (!(flags & SCSI_NOMASK)) - splx(opri); -} - -void -sea_timeout(caddr_t arg1, int arg2) -{ - struct sea_scb *scb = (struct sea_scb *)arg1; - int unit; - struct sea_data *sea; - int s=splbio(); - -#ifdef SEADEBUG2 -/* printf("sea_timeout called\n"); */ - printf(":"); -#endif - - unit = scb->xfer->sc_link->adapter_unit; - sea = seadata[unit]; -#ifndef SEADEBUG /* print message only if not waiting unless debug */ - if(!(scb->xfer->flags & SCSI_NOMASK)) -#endif - printf("sea%d:%d:%d (%s%d) timed out ", unit, - scb->xfer->sc_link->target, - scb->xfer->sc_link->lun, - scb->xfer->sc_link->device->name, - scb->xfer->sc_link->dev_unit); - - /* - * If it has been through before, then - * a previous abort has failed, don't - * try abort again - */ - if (/* (sea_abort(unit, scb) != 1) ||*/ (scb->flags & SCB_ABORTED)) { - /* - * abort timed out - */ -#ifdef SEADEBUG2 -/* printf("sea%d: Abort Operation has timed out\n", unit); */ - printf(":2"); -#endif - scb->xfer->retries = 0; - scb->flags |= SCB_ABORTED; - sea_done(unit, scb); - } else { - #ifdef SEADEBUG2 - /* printf("sea%d: Try to abort\n", unit); */ - printf(":3"); - #endif - sea_abort(unit, scb); - /* sea_send_scb(sea, ~SCSI_NOMASK, SEA_SCB_ABORT, scb); */ - /* 2 seconds for the abort */ - timeout((timeout_func_t)sea_timeout, (caddr_t)scb, 2*hz); - scb->flags |= (SCB_ABORTED | SCB_TIMECHK); - } - splx(s); -} - -int -sea_reselect(sea) - struct sea_data *sea; -{ - unsigned char target_mask; - long l; - unsigned char lun, phase; - unsigned char msg[3]; - int32 len; - u_char *data; - struct sea_scb *tmp = 0, *prev = 0; - int abort = 0; - -#if SEADEBUG2 -/* printf("sea_reselect called\n"); */ - printf("}"); -#endif - - if (!((target_mask = STATUS) & STAT_SEL)) { - printf("sea: wrong state 0x%x\n", target_mask); - return(0); - } - /* wait for a device to win the reselection phase */ - /* signals this by asserting the I/O signal */ - for(l=10; l && (STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) - != (STAT_SEL | STAT_IO | 0);l--); - /* !! Check for timeout here */ - /* the data bus contains original initiator id ORed with target id */ - target_mask = DATA; - /* see that we really are the initiator */ - if (!(target_mask & ((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40))) { - printf("sea: polled reselection was not for me: %x\n",target_mask); - return(0); - } - /* find target who won */ - target_mask &= ((sea->ctrl_type == SEAGATE) ? ~0x80 : ~0x40); - /* host responds by asserting the BSY signal */ - CONTROL = (BASE_CMD | CMD_DRVR_ENABLE | CMD_BSY); - /* target should respond by deasserting the SEL signal */ - for(l=50000;l && (STATUS & STAT_SEL);l++); - /* remove the busy status */ - CONTROL = (BASE_CMD | CMD_DRVR_ENABLE); - /* we are connected. Now we wait for the MSGIN condition */ - for(l=50000; l && !(STATUS & STAT_REQ);l--); - /* !! Add timeout check here */ - /* hope we get an IDENTIFY message */ - len = 3; - data = msg; - phase = REQ_MSGIN; - sea_transfer_pio(sea, &phase, &len, &data); - - if (!(msg[0] & 0x80)) { - printf("sea: Expecting IDENTIFY message, got 0x%x\n", msg[0]); - abort = 1; - } else { - lun = (msg[0] & 0x07); - - /* - * Find the command corresponding to the I_T_L or I_T_L_Q nexus we - * just restablished, and remove it from the disconnected queue. - */ - - for(tmp = sea->disconnected_queue, prev = NULL; - tmp; prev=tmp, tmp = tmp->next) - if((target_mask == (1 << tmp->xfer->sc_link->target)) && - (lun == tmp->xfer->sc_link->lun)) { - if(prev) { -#ifdef SEADEBUG2 - printf("}2"); -#endif - prev->next = tmp->next; - } else { -#ifdef SEADEBUG2 - printf("}3"); -#endif - sea->disconnected_queue = tmp->next; + while (! (scbp = sea->free_scb)) + if (sea->numscb < SEA_SCB_MAX) { + PRINT (("malloced new scb\n")); + scbp = (struct sea_scb*) malloc (sizeof (struct sea_scb), + M_TEMP, M_NOWAIT); + if (scbp) { + bzero (scbp, sizeof (struct sea_scb)); + sea->numscb++; + scbp->flags = SCB_ACTIVE; + scbp->next = 0; + } else + printf ("sea%d: can't malloc scb\n",unit); + goto ret; + } else if (! (flags & SCSI_NOSLEEP)) + tsleep ((caddr_t)&sea->free_scb, PRIBIO, "seascb", 0); + if (scbp) { + /* Get SCB from free list */ + sea->free_scb = scbp->next; + scbp->next = 0; + scbp->flags = SCB_ACTIVE; } - tmp->next = NULL; - break; - } - if (!tmp) { - printf("sea: warning : target %02x lun %d not in disconnect_queue\n", - target_mask, lun); - /* - * Since we have an established nexus that we can't do anything with, - * we must abort it. - */ - abort = 1; - } - } - - if(abort) { -#ifdef SEADEBUG2 - printf("}4"); -#endif - msg[0] = MSG_ABORT; - len = 1; - data = msg; - phase = REQ_MSGOUT; - CONTROL = (BASE_CMD | CMD_ATTN); - sea_transfer_pio(sea, &phase, &len, &data); - } else { -#ifdef SEADEBUG2 - printf("}5"); -#endif - sea->connected = tmp; - } - /* return value not used yet */ - return 0; +ret: if (! (flags & SCSI_NOMASK)) + splx (x); + return (scbp); } -/* Transfer data in given phase using polled I/O -*/ - -int sea_transfer_pio(struct sea_data *sea, u_char *phase, int32 *count, - u_char **data) +void sea_free_scb (int unit, struct sea_scb *scb, int flags) { - register unsigned char p = *phase, tmp; - register int c = *count; - register unsigned char *d = *data; - unsigned long int timeout; + struct sea_data *sea = &seadata[unit]; + int x = 0; -#if SEADEBUG2 -/* printf("sea_transfer_pio called: len:%x\n",c); */ - printf("-1 %x %x", c, p); -#endif + if (! (flags & SCSI_NOMASK)) + x = splbio (); - do { - /* wait for assertion of REQ, after which the phase bits will be valid */ - for(timeout = 0; timeout < 5000000L ; timeout++) - if ((tmp = STATUS) & STAT_REQ) - break; - if (!(tmp & STAT_REQ)) { - printf("sea_transfer_pio: timeout waiting for STAT_REQ\n"); - break; - } + scb->next = sea->free_scb; + sea->free_scb = scb; + scb->flags = SCB_FREE; - /* check for phase mismatch */ - /* Reached if the target decides that it has finished the transfer */ - if ((tmp & REQ_MASK) != p) { -#ifdef SEADEBUG1 -/* printf("-2 %x", tmp); */ - printf("sea:pio phase mismatch:%x, want:%x, len:%x\n",tmp,p,c); -#endif - break; - } - - /* Do actual transfer from SCSI bus to/from memory */ - if (!(p & STAT_IO)) - DATA = *d; - else - *d = DATA; -#ifdef SEADEBUG15 - printf("-7%x", *d); -#endif - ++d; - - /* The SCSI standard suggests that in MSGOUT phase, the initiator - * should drop ATN on the last byte of the message phase - * after REQ has been asserted for the handshake but before - * the initiator raises ACK. - * Don't know how to accomplish this on the ST01/02 - */ - /* We don't mind right now. */ - - /* The st01 code doesn't wait for STAT_REQ to be deasserted. Is this ok? */ -/* for(timeout=0;timeout<200000L;timeout++) - if(!(STATUS & STAT_REQ)) - break; - if(STATUS & STAT_REQ) - printf("timeout on wait for !STAT_REQ"); */ -/* printf("*"); */ - } while (--c); - - *count = c; - *data = d; - tmp = STATUS; - if (tmp & STAT_REQ) { -#if SEADEBUG2 - printf("-3%x", tmp); -#endif - *phase = tmp & REQ_MASK; - } else { -#if SEADEBUG2 - printf("-4%x", tmp); -#endif - *phase = REQ_UNKNOWN; - } - if (!c || (*phase == p)) { -#if SEADEBUG2 - printf("-5%x %x", c, *phase); -#endif - return 0; - } else { -#if SEADEBUG2 - printf("-6"); -#endif - return -1; - } -} - -/* sea_select - * establish I_T_L or I_T_L_Q nexus for new or existing command - * including ARBITRATION, SELECTION, and initial message out for IDENTIFY and - * queue messages. - * return -1 if selection could not execute for some reason, 0 if selection - * succeded or failed because the taget did not respond - */ -int sea_select(struct sea_data *sea, struct sea_scb *scb) -{ - unsigned char tmp[3], phase; - u_char *data; - int32 len; - unsigned long timeout; - -#ifdef SEADEBUG2 -/* printf("sea_select called\n"); */ - printf("{"); -#endif - - CONTROL = BASE_CMD; - DATA = ((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40); - CONTROL = (BASE_CMD & ~CMD_INTR) | CMD_START_ARB; - /* wait for arbitration to complete */ - for (timeout = 0; timeout < 3000000L ; timeout++) { - if (STATUS & STAT_ARB_CMPL) - break; - } - if (!(STATUS & STAT_ARB_CMPL)) { - if (STATUS & STAT_SEL) { - printf("sea: arbitration lost\n"); - scb->flags |= SCB_ERROR; - } else { - printf("sea: arbitration timeout.\n"); - scb->flags |=SCB_TIMEOUT; - } - CONTROL = BASE_CMD; - return(-1); - } - DELAY(2); - -#if SEADEBUG2 -/* printf("after arbitration: STATUS=%x\n", STATUS); */ - printf("{2 %x", STATUS); -#endif - - DATA = (unsigned char)((1 << scb->xfer->sc_link->target) | - ((sea->ctrl_type == SEAGATE) ? 0x80 : 0x40)); -#ifdef SEANOMSGS - CONTROL = (BASE_CMD & (~CMD_INTR))| CMD_DRVR_ENABLE | CMD_SEL; -#else - CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN; -#endif - DELAY(1); - /* wait for a bsy from target */ - for (timeout = 0; timeout < 2000000L; timeout++) { - if (STATUS & STAT_BSY) - break; - } - -#if SEADEBUG2 -/* printf("after wait for BSY: STATUS=%x,count=%lx\n", STATUS, timeout); */ - printf("{3 %x %x", STATUS, timeout); -#endif - - if (!(STATUS & STAT_BSY)) { - /* should return some error to the higher level driver */ - CONTROL = BASE_CMD; -#if SEADEBUG2 -/* printf("sea: target did not respond\n"); */ - printf("{4"); -#endif - scb->flags |= SCB_TIMEOUT; - return 0; - } - - /* Try to make the target to take a message from us */ -#ifdef SEANOMSGS - CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE; -#else - CONTROL = (BASE_CMD & (~CMD_INTR)) | CMD_DRVR_ENABLE | CMD_ATTN; -#endif - - DELAY(1); - - /* should start a msg_out phase */ - for (timeout = 0; timeout < 2000000L ; timeout++) { - if (STATUS & STAT_REQ) - break; - } - - CONTROL = BASE_CMD | CMD_DRVR_ENABLE; - -#if SEADEBUG2 || SEADEBUG9 -/* printf("after wait for STAT_REQ: STATUS=%x,count=%lx\n", STATUS, timeout); - printf("2:nd try after wait for STAT_REQ: STATUS=%x\n", STATUS); */ - printf("{5%x", timeout); -#endif - - if (!(STATUS & STAT_REQ)) { - /* This should not be taken as an error, but more like an unsupported - * feature! - * Should set a flag indicating that the target don't support messages, and - * continue without failure. (THIS IS NOT AN ERROR!) - */ -#if SEADEBUG -/* printf("{6"); */ - printf("sea: WARNING: target %x don't support messages?\n", - scb->xfer->sc_link->target); -#endif - } else { - tmp[0] = IDENTIFY(1, scb->xfer->sc_link->lun); /* allow disconnects */ - len = 1; - data = tmp; - phase = REQ_MSGOUT; - /* Should do test on result of sea_transfer_pio */ -#if SEADEBUG2 -/* printf("Trying a msg out phase\n"); */ - printf("{7"); -#endif - sea_transfer_pio(sea, &phase, &len, &data); - } - if (!(STATUS & STAT_BSY)) { - printf("sea: after successful arbitrate: No STAT_BSY!\n"); - } - -#if SEADEBUG2 - printf("{8"); -#endif - sea->connected = scb; - sea->busy[scb->xfer->sc_link->target] |= (1 << scb->xfer->sc_link->lun); - /* this assignment should depend on possibility to send a message to target */ - CONTROL = BASE_CMD | CMD_DRVR_ENABLE; - /* reset pointer in command ??? */ - return 0; -} - -/* sea_abort - send an abort to the target - return 1 success, 0 on failure - */ -int sea_abort(int unit, struct sea_scb *scb) -{ - struct sea_data *sea = seadata[unit]; - struct sea_scb *tmp, **prev; - unsigned char msg, phase, *msgptr; - int32 len; - int oldpri; - -#ifdef SEADEBUG2 -/* printf("sea_abort called\n"); */ - printf("\\"); -#endif - - oldpri = splbio(); - - /* If the command hasn't been issued yet, we simply remove it from the - * issue queue - */ - for (prev = (struct sea_scb **) &(sea->issue_queue), - tmp = sea->issue_queue; tmp; - prev = (struct sea_scb **) &(tmp->next), tmp = tmp->next) - if (scb == tmp) { - (*prev) = tmp->next; - tmp->next = NULL; - /* set some type of error result for this operation */ - splx(oldpri); -#ifdef SEADEBUG2 - printf("\\2"); -#endif - return 1; - } - - /* If any commands are connected, we're going to fail the abort - * and let the high level SCSI driver retry at a later time or issue a - * reset - */ - - if(sea->connected) { - splx(oldpri); -#ifdef SEADEBUG2 -/* printf("sea:abort error connected\n"); */ - printf("\\3"); -#endif - return 0; - } - - /* If the command is currently disconnected from the bus, and there are - * no connected commands, we reconnect the I_T_L or I_T_L_Q nexus - * associated with it, go into message out, and send an abort message. - */ - - for (tmp = sea->disconnected_queue; tmp; tmp = tmp->next) - if (scb == tmp) { - splx(oldpri); -#ifdef SEADEBUG2 - printf("\\4"); -#endif - if (sea_select(sea,scb)) { -#ifdef SEADEBUG2 - printf("\\5"); -#endif - return 0; - } - msg = MSG_ABORT; - msgptr = &msg; - len = 1; - phase = REQ_MSGOUT; - CONTROL = BASE_CMD | CMD_ATTN; - sea_transfer_pio(sea, &phase, &len, &msgptr); - - oldpri = splbio(); - for (prev = (struct sea_scb **) &(sea->disconnected_queue), - tmp = sea->disconnected_queue; tmp ; - prev = (struct sea_scb **) &(tmp->next), tmp = tmp->next) - if (scb == tmp) { - *prev = tmp->next; - tmp->next = NULL; - /* set some type of error result for the operation */ -#ifdef SEADEBUG2 - printf("\\6"); -#endif - splx(oldpri); - return 1; - } - } - - /* command not found in any queue, race condition in the code ? */ - - splx(oldpri); -#ifdef SEADEBUG2 -/* printf("sea: WARNING: SCSI command probably completed successfully\n" - " before abortion\n"); */ - printf("\\7"); -#endif - return 1; - -} - -void sea_done(int unit, struct sea_scb *scb) -{ - struct sea_data *sea = seadata[unit]; - struct scsi_xfer *xs = scb->xfer; - - -#ifdef SEADEBUG2 -/* printf("sea_done called\n"); */ - printf("&"); -#endif - - if (scb->flags & SCB_TIMECHK) { -#ifdef SEADEBUG2 - printf("&2"); -#endif - untimeout((timeout_func_t)sea_timeout, (caddr_t)scb); - } - - xs->resid = scb->datalen; /* How much of the buffer was not touched */ - - if ((scb->flags == SCB_ACTIVE) || (xs->flags & SCSI_ERR_OK)) { -#ifdef SEADEBUG2 -/* printf("sea_done:Report no err in xs\n"); */ - printf("&3"); -#endif -/* xs->resid = 0; */ -/* xs->error = 0; */ - } else { - - if (!(scb->flags == SCB_ACTIVE)) { - if ((scb->flags & SCB_TIMEOUT) || (scb->flags & SCB_ABORTED)) { -#ifdef SEADEBUG2 - printf("&6"); -#endif - xs->error = XS_TIMEOUT; - } - if (scb->flags & SCB_ERROR) { -#ifdef SEADEBUG2 - printf("&7"); -#endif - xs->error = XS_DRIVER_STUFFUP; - } - } else { - - /* !!! Add code to check for target status */ - /* say all error now */ - xs->error = XS_DRIVER_STUFFUP; -#ifdef SEADEBUG2 - printf("&4"); -#endif - } - } - xs->flags |= ITSDONE; - sea_free_scb(unit, scb, xs->flags); - scsi_done(xs); -#ifdef SEADEBUG2 -/* printf("Leaving sea_done\n"); */ - printf("&5"); -#endif -} - -/* wait for completion of command in polled mode */ - -int sea_poll(int unit, struct scsi_xfer *xs, struct sea_scb *scb) -{ - int count = 500; /* xs->timeout; */ - int oldpri; - -#ifdef SEADEBUG2 -/* printf("sea_poll called\n"); */ - printf("?"); -#endif - - while (count) { - /* try to do something */ - oldpri = splbio(); - if (!main_running) { - main_running = 1; - sea_main(); - /* main_running is cleared in sea_main once it can't - * do more work, and sea_main exits with interrupts - * disabled - */ - splx(oldpri); - } else { - splx(oldpri); - } - if (xs->flags & ITSDONE) { - break; - } - DELAY(10); - count--; - } -#ifdef SEADEBUG2 - printf("?2 %x ", count); -/* printf("sea_poll: count:%x\n",count); */ -#endif - if (count == 0) { - /* 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. - */ -#ifdef SEADEBUG2 - printf("?3"); -#endif - sea_timeout((caddr_t)scb, 0); - - /* because we are polling, take out the timeout entry - * sea_timeout made - */ -#ifdef SEADEBUG2 - printf("?4"); -#endif - untimeout((timeout_func_t)sea_timeout, (caddr_t) scb); - count = 50; - while (count) { - /* once again, wait for the int bit */ - oldpri = splbio(); - if (!main_running) { - main_running = 1; - sea_main(); - /* main_running is cleared by sea_main once it can't - * do more work, and sea_main exits with interrupts - * disabled + /* + * If there were none, wake anybody waiting for one to come free, + * starting with queued entries. */ - splx(oldpri); - } else { - splx(oldpri); - } - if (xs->flags & ITSDONE) { - break; - } - DELAY(10); - count--; - } - if (count == 0) { - /* we timed out again... This is bad. Notice that - * this time there is no clock queue entry to remove - */ -#ifdef SEADEBUG2 - printf("?5"); -#endif - sea_timeout((caddr_t)scb, 0); - } - } -#ifdef SEADEBUG2 -/* printf("sea_poll: xs->error:%x\n",xs->error); */ - printf("?6%x",xs->error); -#endif - if (xs->error) { -#ifdef SEADEBUG2 -/* printf("done return error\n"); */ - printf("?7"); -#endif - return (HAD_ERROR); - } -#ifdef SEADEBUG2 -/* printf("done return complete\n"); */ - printf("?8"); -#endif - return (COMPLETE); + if (! scb->next) + wakeup ((caddr_t) &sea->free_scb); + + if (! (flags & SCSI_NOMASK)) + splx (x); } /* - * sea_information_transfer - * Do the transfer. We know we are connected. Update the flags, - * call sea_done when task accomplished. Dialog controlled by the - * target + * Start a scsi operation given the command and the data address. + * Also needs the unit, target and lu. Get a free scb and set it up. + * Call send_scb. Either start timer or wait until done. */ -static void sea_information_transfer (struct sea_data *sea) +int32 sea_scsi_cmd (struct scsi_xfer *xs) { - long int timeout; - int unit = sea->sc_link.adapter_unit; - unsigned char msgout = MSG_NOP; - int32 len; - int oldpri; - u_char *data; - unsigned char phase, tmp, old_phase=REQ_UNKNOWN; - struct sea_scb *scb = sea->connected; - int loop; + int unit = xs->sc_link->adapter_unit, flags = xs->flags, x = 0; + struct sea_data *sea = &seadata[unit]; + struct sea_scb *scb; -#if SEADEBUG2 -/* printf("sea_information_transfer called\n"); */ - printf("!"); -#endif - - for(timeout = 0; timeout < 10000000L ; timeout++) { - tmp = STATUS; - if (!(tmp & STAT_BSY)) { -/* for(loop=0;loop < 20 ; loop++) { - if((tmp=STATUS) & STAT_BSY) - break; - } */ -#ifndef SEADEBUG8 - if(!(tmp & STAT_BSY)) { - printf("sea: !STAT_BSY unit in data transfer!\n"); - oldpri = splbio(); - sea->connected = NULL; - scb->flags = SCB_ERROR; - splx(oldpri); - sea_done(unit, scb); - return; - } -#endif - } - - /* we only have a valid SCSI phase when REQ is asserted */ - if (tmp & STAT_REQ) { - phase = (tmp & REQ_MASK); - if (phase != old_phase) { - old_phase = phase; - } - -#ifdef SEADEBUG7 - printf("!2%x", phase); - for(loop=0;loop < 20; loop++) { - phase = STATUS; - printf("!6%x",phase); - phase = phase & REQ_MASK; - } -#endif - - switch (phase) { - case REQ_DATAOUT: -#ifdef SEA_NODATAOUT - printf("sea: SEA_NODATAOUT set, attempted DATAOUT aborted\n"); - msgout = MSG_ABORT; - CONTROL = BASE_CMD | CMD_ATTN; - break; -#endif - case REQ_DATAIN: -/* data = scb->xfer->data; - len = scb->xfer->datalen; -*/ if(!(scb->data)) { - printf("no data address!\n"); - } -#ifdef SEA_BLINDTRANSFER - if (scb->datalen && !(scb->datalen % BLOCK_SIZE)) { - while (scb->datalen) { - for(timeout = 0; timeout < 5000000L ; timeout++) - if((tmp = STATUS) & STAT_REQ) - break; - if(!(tmp & STAT_REQ)) { - printf("sea_transfer_pio: timeout waiting for STAT_REQ\n"); - /* getchar(); */ - } - if((tmp & REQ_MASK) != phase) { -#ifdef SEADEBUG1 - printf("sea:infotransfer phase mismatch:%x, want:%x, len:%x\n", - tmp,phase,scb->datalen); - /* getchar(); */ -#endif - break; - } - if(!(phase & STAT_IO)) { -#ifdef SEA_ASSEMBLER - asm(" - shr $2, %%ecx; - cld; - rep; - movsl; " : : - "D" (sea->st0x_dr), "S" (scb->data), "c" (BLOCK_SIZE) : - "cx", "si", "di" ); - scb->data += BLOCK_SIZE; -#else - for(count=0; count < BLOCK_SIZE; count++) { - DATA = *(scb->data); - scb->data++; - } -#endif - } else { -#ifdef SEA_ASSEMBLER - asm(" - shr $2, %%ecx; - cld; - rep; - movsl; " : : - "S" (sea->st0x_dr), "D" (scb->data), "c" (BLOCK_SIZE) : - "cx", "si", "di" ); - scb->data += BLOCK_SIZE; -#else - for(count=0; count < BLOCK_SIZE; count++) { - *scb->data = DATA; - scb->data++; - } -#endif - } - scb->datalen -= BLOCK_SIZE; - } - } - - /* save current position into the command structure */ -/* scb->xfer->data = data; - scb->xfer->datalen = len; */ -#endif - - sea_transfer_pio(sea, &phase, &(scb->datalen), &(scb->data)); -/* scb->xfer->data = data; - scb->xfer->datalen = len; -*/ break; - - case REQ_MSGIN: - /* don't handle multi-byte messages here, because they - * should not be present here - */ - len = 1; - data = &tmp; - sea_transfer_pio(sea, &phase, &len, &data); - /* scb->MessageIn = tmp; */ - - switch (tmp) { - - case MSG_ABORT: - scb->flags = SCB_ABORTED; - printf("sea:Command aborted by target\n"); - CONTROL = BASE_CMD; - sea_done(unit, scb); - return; - - case MSG_COMMAND_COMPLETE: - oldpri = splbio(); - sea->connected = NULL; - splx(oldpri); -#ifdef SEADEBUG2 - printf("!3"); -#endif - sea->busy[scb->xfer->sc_link->target] &= - ~(1 << scb->xfer->sc_link->lun); - - CONTROL = BASE_CMD; - sea_done(unit, scb); - return; - case MSG_MESSAGE_REJECT: - /* printf("sea: message_reject recieved\n"); */ - printf("!4"); - break; - case MSG_DISCONNECT: - oldpri = splbio(); - scb->next = sea->disconnected_queue; - sea->disconnected_queue = scb; - sea->connected = NULL; - CONTROL = BASE_CMD; - splx(oldpri); -#ifdef SEADEBUG2 -/* printf("msg_disconnect\n"); */ - printf("!5"); -#endif - return; - /* save/restore of pointers are ignored */ - case MSG_SAVE_POINTERS: - case MSG_RESTORE_POINTERS: -#if SEADEBUG2 - printf("sea: rec save/restore ptrs\n"); -#endif - break; - default: - /* this should be handled in the pio data transfer phase, as the - * ATN should be raised before ACK goes false when rejecting a message - */ -#ifdef SEADEBUG - printf("sea: Unknown message in:%x\n", tmp); -#endif - break; - } /* switch (tmp) */ - break; - case REQ_MSGOUT: - len = 1; - data = &msgout; - /* sea->last_message = msgout; */ - sea_transfer_pio(sea, &phase, &len, &data); - if (msgout == MSG_ABORT) { - printf("sea: sent message abort to target\n"); - oldpri = splbio(); - sea->busy[scb->xfer->sc_link->target] &= - ~(1 << scb->xfer->sc_link->lun); - sea->connected = NULL; - scb->flags = SCB_ABORTED; - splx(oldpri); - /* enable interrupt from scsi */ - sea_done(unit, scb); - return; + PRINT (("sea%d:%d:%d command 0x%x\n", unit, xs->sc_link->target, + xs->sc_link->lun, xs->cmd->opcode)); + if (xs->bp) + flags |= SCSI_NOSLEEP; + if (flags & ITSDONE) { + printf ("sea%d: already done?", unit); + xs->flags &= ~ITSDONE; } - msgout = MSG_NOP; - break; - case REQ_CMDOUT: - len = scb->xfer->cmdlen; - data = (char *) scb->xfer->cmd; - sea_transfer_pio(sea, &phase, &len, &data); - break; - case REQ_STATIN: - len = 1; - data = &tmp; - sea_transfer_pio(sea, &phase, &len, &data); - scb->xfer->status = tmp; - break; - default: - printf("sea: unknown phase\n"); - } /* switch (phase) */ - } /* if (tmp & STAT_REQ) */ - } /* for (...) */ - /* if we get here we have got a timeout! */ - printf("sea: Timeout in data transfer\n"); - scb->flags = SCB_TIMEOUT; - /* should I clear scsi-bus state? */ - sea_done(unit, scb); + if (! (flags & INUSE)) { + printf ("sea%d: not in use?", unit); + xs->flags |= INUSE; + } + scb = sea_get_scb (unit, flags); + if (! scb) { + xs->error = XS_DRIVER_STUFFUP; + return (TRY_AGAIN_LATER); + } + + /* Put all the arguments for the xfer in the scb */ + scb->xfer = xs; + scb->datalen = xs->datalen; + scb->data = xs->data; + + if (flags & SCSI_RESET) + /* Try to send a reset command to the card. This is done + * by calling the Reset function. Should then return COMPLETE. + * Need to take care of the possible current connected command. + * Not implemented right now. */ + printf ("sea%d: got a SCSI_RESET!\n", unit); + + if (! (flags & SCSI_NOMASK)) + x = splbio (); + + /* Setup the scb to contain necessary values. + * The interesting values can be read from the xs that is saved. + * I therefore think that the structure can be kept very small. + * The driver doesn't use DMA so the scatter/gather is not needed? */ + /* A check is done to see if the command contains + * a REQUEST_SENSE command, and if so the command is put first + * in the queue, otherwise the command is added to the end + * of the queue. ?? Not correct ?? */ + if (! sea->issue_queue || + (sea->sensefirst && xs->cmd->opcode == REQUEST_SENSE)) { + scb->next = sea->issue_queue; + sea->issue_queue = scb; + } else { + struct sea_scb *q; + + for (q=sea->issue_queue; q->next; q=q->next) + continue; + q->next = scb; + scb->next = 0; /* placed at the end of the queue */ + } + + /* Try to send this command to the board. Because this board + * does not use any mailboxes, this routine simply adds the command + * to the queue held by the sea_data structure. */ + sea_start (); + + /* Usually return SUCCESSFULLY QUEUED. */ + if (! (flags & SCSI_NOMASK)) { + splx (x); + if (xs->flags & ITSDONE) + /* Timeout timer not started, already finished. + * Tried to return COMPLETE but the machine hanged + * with this. */ + return (SUCCESSFULLY_QUEUED); + timeout (sea_timeout, (caddr_t) scb, (xs->timeout * hz) / 1000); + scb->flags |= SCB_TIMECHK; + PRINT (("sea%d:%d:%d command queued\n", unit, + xs->sc_link->target, xs->sc_link->lun)); + return (SUCCESSFULLY_QUEUED); + } + + /* If we can't use interrupts, poll on completion. */ + if (! sea_poll (xs)) { + /* 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. */ + sea_timeout ((void*) scb); + + /* Because we are polling, take out the timeout entry + * sea_timeout made. */ + untimeout (sea_timeout, (void*) scb); + + if (! sea_poll (xs)) + /* We timed out again... This is bad. Notice that + * this time there is no clock queue entry to remove. */ + sea_timeout ((void*) scb); + } + PRINT (("sea%d:%d:%d command %s\n", unit, + xs->sc_link->target, xs->sc_link->lun, + xs->error ? "failed" : "done")); + return (xs->error ? HAD_ERROR : COMPLETE); } +/* + * Coroutine that runs as long as more work can be done. + * Both sea_scsi_cmd and sea_intr will try to start it in + * case it is not running. + * Always called with interrupts disabled. + */ +static void sea_start (void) +{ + int unit, done; +again: done = 1; + for (unit=0; unitconnected) { + /* Search through the issue_queue for a command + * destined for a target that's not busy. */ + struct sea_scb *q, *prev = 0; + + for (q=sea->issue_queue; q; prev=q, q=q->next) { + if (IS_BUSY (sea, q)) + continue; + + /* First check that if any device has tried + * a reconnect while we have done other things + * with interrupts disabled. */ + if ((*sea->STATUS & (STAT_SEL | STAT_IO)) == + (STAT_SEL | STAT_IO)) { + sea_reselect (sea); + break; + } + + /* When we find the command, remove it + * from the issue queue. */ + if (prev) + prev->next = q->next; + else + sea->issue_queue = q->next; + q->next = 0; + + /* Attempt to establish an I_T_L nexus here. + * On success, sea->connected is set. + * On failure, we must add the command back to + * the issue queue so we can keep trying. */ + if (sea_select (sea, q)) + break; + q->next = sea->issue_queue; + sea->issue_queue = q; + printf ("sea_start: select failed\n"); + } + } + + if (sea->connected) { + /* We are connected. Do the task. */ + sea_information_transfer (sea); + done = 0; + } + } + if (! done) + goto again; +} + +void sea_timeout (void *arg) +{ + struct sea_scb *scb = (struct sea_scb*) arg; + int unit = scb->xfer->sc_link->adapter_unit; + int x = splbio (); + + if (! (scb->xfer->flags & SCSI_NOMASK)) + printf ("sea%d:%d:%d (%s%d) timed out\n", unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, + scb->xfer->sc_link->device->name, + scb->xfer->sc_link->dev_unit); + + /* + * If it has been through before, then a previous abort has failed, + * don't try abort again. + */ + if (! (scb->flags & SCB_ABORTED) /*&& sea_abort (unit, scb)*/) { + sea_abort (unit, scb); + /* 2 seconds for the abort */ + timeout (sea_timeout, (caddr_t)scb, 2*hz); + scb->flags |= (SCB_ABORTED | SCB_TIMECHK); + } else { + /* abort timed out */ + scb->flags |= SCB_ABORTED; + scb->xfer->retries = 0; + sea_done (unit, scb); + } + splx (x); +} + +/* + * Establish I_T_L or I_T_L_Q nexus for new or existing command + * including ARBITRATION, SELECTION, and initial message out + * for IDENTIFY and queue messages. + * Return 0 if selection could not execute for some reason, 1 if selection + * succeded or failed because the target did not respond. + */ +int sea_select (struct sea_data *sea, struct sea_scb *scb) +{ + PRINT (("sea%d:%d:%d select\n", sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, scb->xfer->sc_link->lun)); + *sea->CONTROL = sea->parity; + *sea->DATA = sea->scsi_id; + *sea->CONTROL = CMD_START_ARB | sea->parity; + + /* Wait for arbitration to complete. */ + WAITFOR (*sea->STATUS & STAT_ARB_CMPL, "arbitration"); + + if (! (*sea->STATUS & STAT_ARB_CMPL)) { + if (*sea->STATUS & STAT_SEL) { + printf ("sea: arbitration lost\n"); + scb->flags |= SCB_ERROR; + } else { + printf ("sea: arbitration timeout\n"); + scb->flags |= SCB_TIMEOUT; + } + *sea->CONTROL = CMD_INTR | sea->parity; + return (0); + } + DELAY (2); + + *sea->DATA = (1 << scb->xfer->sc_link->target) | sea->scsi_id; + *sea->CONTROL = CMD_DRVR_ENABLE | CMD_SEL | CMD_ATTN | sea->parity; + DELAY (1); + + /* Wait for a bsy from target. + * If the target is not present on the bus, we get + * the timeout. Don't PRINT any message -- it's not an error. */ + WAITFOR (*sea->STATUS & STAT_BSY, 0); + + if (! (*sea->STATUS & STAT_BSY)) { + /* The target does not respond. Not an error, though. + * Should return some error to the higher level driver? */ + *sea->CONTROL = CMD_INTR | sea->parity; + scb->flags |= SCB_TIMEOUT; + return (1); + } + + /* Try to make the target to take a message from us. */ + *sea->CONTROL = CMD_DRVR_ENABLE | CMD_ATTN | sea->parity; + DELAY (1); + + /* Should start a msg_out phase. */ + WAITFOR (*sea->STATUS & STAT_REQ, 0); + + if (! (*sea->STATUS & STAT_REQ)) { + /* This should not be taken as an error, but more like + * an unsupported feature! + * Should set a flag indicating that the target don't support + * messages, and continue without failure. + * (THIS IS NOT AN ERROR!) + */ + printf ("sea: target does not support messages, canceled\n"); + scb->flags |= SCB_ERROR; + *sea->CONTROL = CMD_INTR | sea->parity; + return (0); + } + + sea->connected = scb; + SET_BUSY (sea, scb); + *sea->CONTROL = CMD_DRVR_ENABLE | sea->parity; + + /* Allow disconnects. */ + sea_msg_output (sea, MSG_IDENTIFY (scb->xfer->sc_link->lun)); + + if (! (*sea->STATUS & STAT_BSY)) + printf ("sea: target disconnected after successful arbitrate\n"); + + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | sea->parity; + return (1); +} + +int sea_reselect (struct sea_data *sea) +{ + struct sea_scb *q = 0, *prev = 0; + u_char msg, target_mask; + + PRINT (("sea%d reselect: ", sea->sc_link.adapter_unit)); + + if (! (*sea->STATUS & STAT_SEL)) { + printf ("sea: wrong state 0x%x\n", *sea->STATUS); + return (0); + } + + /* Wait for a device to win the reselection phase. */ + /* Signals this by asserting the I/O signal. */ + WAITFOR ((*sea->STATUS & (STAT_SEL | STAT_IO | STAT_BSY)) == + (STAT_SEL | STAT_IO), "reselection phase"); + + /* The data bus contains original initiator id ORed with target id. */ + /* See that we really are the initiator. */ + target_mask = *sea->DATA; + if (! (target_mask & sea->scsi_id)) { + printf ("sea: polled reselection was not for me: %x\n", + target_mask); + return (0); + } + + /* Find target who won. */ + /* Host responds by asserting the BSY signal. */ + /* Target should respond by deasserting the SEL signal. */ + target_mask &= ~sea->scsi_id; + *sea->CONTROL = CMD_DRVR_ENABLE | CMD_BSY | sea->parity; + WAITFOR (! (*sea->STATUS & STAT_SEL), "reselection acknowledge"); + + /* Remove the busy status. */ + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | sea->parity; + + /* We are connected. Now we wait for the MSGIN condition. */ + WAITFOR (*sea->STATUS & STAT_REQ, "identify message"); + + /* Hope we get an IDENTIFY message. */ + msg = sea_msg_input (sea); + if (! MSG_ISIDENT (msg)) + printf ("sea: expecting IDENTIFY message, got 0x%x\n", msg); + else { + /* Find the command corresponding to the I_T_L or I_T_L_Q + * nexus we just restablished, and remove it from + * the disconnected queue. */ + unsigned char lun = (msg & 7); + + for (q=sea->disconnected_queue; q; prev=q, q=q->next) { + if (target_mask != (1 << q->xfer->sc_link->target)) + continue; + if (lun != q->xfer->sc_link->lun) + continue; + if (prev) + prev->next = q->next; + else + sea->disconnected_queue = q->next; + q->next = 0; + sea->connected = q; + PRINT (("lun %d done\n", lun)); + return (1); + } + /* Since we have an established nexus that we can't + * do anything with, we must abort it. */ + PRINT (("lun %d aborted\n", lun)); + } + + /* Abort the connection. */ + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | CMD_ATTN | sea->parity; + sea_msg_output (sea, MSG_ABORT); + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | sea->parity; + return (0); +} + +/* + * Send an abort to the target. + * Return 1 success, 0 on failure. + * Called on splbio level. + */ +int sea_abort (int unit, struct sea_scb *scb) +{ + struct sea_data *sea = &seadata[unit]; + struct sea_scb *q, **prev; + + /* If the command hasn't been issued yet, we simply remove it + * from the issue queue. */ + prev = &sea->issue_queue; + for (q=sea->issue_queue; q; q=q->next) { + if (scb == q) { + (*prev) = q->next; + q->next = 0; + return (1); + } + prev = &q->next; + } + + /* If any commands are connected, we're going to fail the abort + * and let the high level SCSI driver retry at a later time + * or issue a reset. */ + if (sea->connected) + return (0); + + /* If the command is currently disconnected from the bus, + * and there are no connected commands, we reconnect + * the I_T_L or I_T_L_Q nexus associated with it, + * go into message out, and send an abort message. */ + for (q=sea->disconnected_queue; q; q=q->next) { + if (scb != q) + continue; + + if (! sea_select (sea, scb)) + return (0); + + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | CMD_ATTN | sea->parity; + sea_msg_output (sea, MSG_ABORT); + *sea->CONTROL = CMD_INTR | CMD_DRVR_ENABLE | sea->parity; + + prev = &sea->disconnected_queue; + for (q=sea->disconnected_queue; q; q=q->next) { + if (scb == q) { + *prev = q->next; + q->next = 0; + /* Set some type of error result + * for the operation. */ + return (1); + } + prev = &q->next; + } + } + + /* Command not found in any queue, race condition in the code? */ + return (1); +} + +void sea_done (int unit, struct sea_scb *scb) +{ + struct scsi_xfer *xs = scb->xfer; + + if (scb->flags & SCB_TIMECHK) + untimeout (sea_timeout, (caddr_t) scb); + + /* How much of the buffer was not touched. */ + xs->resid = scb->datalen; + + if (scb->flags != SCB_ACTIVE && ! (xs->flags & SCSI_ERR_OK)) + if (scb->flags & (SCB_TIMEOUT | SCB_ABORTED)) + xs->error = XS_TIMEOUT; + else if (scb->flags & SCB_ERROR) + xs->error = XS_DRIVER_STUFFUP; + + xs->flags |= ITSDONE; + sea_free_scb (unit, scb, xs->flags); + scsi_done (xs); +} + +/* + * Wait for completion of command in polled mode. + * Always called with interrupts masked out. + */ +int sea_poll (struct scsi_xfer *xs) +{ + int count; + + for (count=0; count<1000; ++count) { + if (xs->flags & ITSDONE) + return (1); + /* Try to do something. */ + DELAY (30); + sea_start (); + } + return (0); +} + +/* + * Wait until REQ goes down. This is needed for some devices (CDROMs) + * after every MSGOUT, MSGIN, CMDOUT, STATIN request. + * Return true if REQ deassert found. + */ +static inline int sea_wait_for_req_deassert (struct sea_data *sea, + int cnt, char *msg) +{ + asm (" + 1: testb $0x10, %2 + jz 2f + loop 1b + 2:" + : "=c" (cnt) /* output */ + : "0" (cnt), "m" (*sea->STATUS)); /* input */ + if (! cnt) { + PRINT (("sea%d:%d:%d (%s) timeout waiting for !REQ\n", + sea->sc_link.adapter_unit, + sea->connected->xfer->sc_link->target, + sea->connected->xfer->sc_link->lun, msg)); + return (0); + } + /* PRINT (("sea_wait_for_req_deassert %s count=%d\n", msg, cnt)); */ + return (1); +} + +/* + * Send the command to the target. + */ +void sea_cmd_output (struct sea_data *sea, u_char *cmd, int cmdlen) +{ + struct sea_target *t = &sea->target[sea->connected->xfer->sc_link->target]; + + if (! cmdlen || ! cmd) { + printf ("sea%d:%d:%d no command\n", + sea->sc_link.adapter_unit, + sea->connected->xfer->sc_link->target, + sea->connected->xfer->sc_link->lun); + *sea->DATA = 0; + sea_wait_for_req_deassert (sea, 1000, "ZCMDOUT"); + return; + } + PRINT (("sea%d:%d:%d (CMDOUT) send %d bytes ", + sea->sc_link.adapter_unit, + sea->connected->xfer->sc_link->target, + sea->connected->xfer->sc_link->lun, cmdlen)); + + PRINT (("%x", *cmd)); + *sea->DATA = *cmd++; + WAITREQ (t, cmdout1, 10000); + --cmdlen; + + while (cmdlen) { + /* Check for target disconnect. */ + u_char sts = *sea->STATUS; + if (! (sts & STAT_BSY)) + break; + + /* Check for phase mismatch. */ + if ((sts & REQ_MASK) != REQ_CMDOUT) { + printf ("sea: sending command: invalid phase %s\n", + sea_phase_name[sts & REQ_MASK]); + return; + } + + /* Wait for REQ. */ + if (! (sts & STAT_REQ)) + continue; + + PRINT (("-%x", *cmd)); + *sea->DATA = *cmd++; + WAITREQ (t, cmdout, 1000); + --cmdlen; + } + PRINT (("\n")); +} + +/* + * Send the message to the target. + */ +void sea_msg_output (struct sea_data *sea, u_char msg) +{ + struct sea_target *t = sea->connected ? + &sea->target[sea->connected->xfer->sc_link->target] : 0; + register u_long cnt = 0; + register u_char sts; + + /* Wait for REQ, after which the phase bits will be valid. */ +again: sts = *sea->STATUS; + if (! (sts & STAT_REQ)) { + if (++cnt > 1000000L) { + printf ("sea: sending message: no REQ\n"); + return; + } + goto again; + } + + /* Check for phase mismatch. */ + if ((sts & REQ_MASK) != REQ_MSGOUT) { + printf ("sea: sending message: invalid phase %s\n", + sea_phase_name[sts & REQ_MASK]); + return; + } + + *sea->DATA = msg; + if (! t) + sea_wait_for_req_deassert (sea, 1000, "MSG_OUTPUT"); + else + WAITREQ (t, msgout, 1000); + PRINT (("sea%d:%d:%d (MSGOUT) send 0x%x\n", + sea->sc_link.adapter_unit, + sea->connected ? sea->connected->xfer->sc_link->target : 9, + sea->connected ? sea->connected->xfer->sc_link->lun : 9, + msg)); +} + +/* + * Get the message from the target. + * Return the length of the received message. + */ +u_char sea_msg_input (struct sea_data *sea) +{ + register u_long cnt = 0; + register u_char sts, msg; + + /* Wait for REQ, after which the phase bits will be valid. */ +again: sts = *sea->STATUS; + if (! (sts & STAT_REQ)) { + if (++cnt > 1000000L) { + printf ("sea: receiving message: no REQ\n"); + return (MSG_ABORT); + } + goto again; + } + + /* Check for phase mismatch. + * Reached if the target decides that it has finished + * the transfer. */ + if ((sts & REQ_MASK) != REQ_MSGIN) { + printf ("sea: sending message: invalid phase %s\n", + sea_phase_name[sts & REQ_MASK]); + return (MSG_ABORT); + } + + /* Do actual transfer from SCSI bus to/from memory. */ + msg = *sea->DATA; + sea_wait_for_req_deassert (sea, 1000, "MSG_INPUT"); + PRINT (("sea%d:%d:%d (MSG_INPUT) got 0x%x\n", + sea->sc_link.adapter_unit, + sea->connected ? sea->connected->xfer->sc_link->target : 9, + sea->connected ? sea->connected->xfer->sc_link->lun : 9, msg)); + return (msg); +} + +/* + * This routine is used in the case when we have no IRQ line (sea->irq == 0). + * It is called every timer tick and polls for reconnect from target. + */ +void sea_tick (void *arg) +{ + struct sea_data *sea = arg; + int x = splbio (); + + sea->timeout_active = 0; + while ((*sea->STATUS & (STAT_SEL | STAT_IO)) == (STAT_SEL | STAT_IO)) { + /* Reselect interrupt */ + sea_reselect (sea); + sea_start (); + } + if (sea->disconnected_queue && ! sea->timeout_active) { + timeout (sea_tick, sea, 1); + sea->timeout_active = 1; + } + splx (x); +} + +/* + * Do the transfer. We know we are connected. Update the flags, + * call sea_done when task accomplished. Dialog controlled by the target. + * Always called with interrupts disabled. + */ +static void sea_information_transfer (register struct sea_data *sea) +{ + struct sea_scb *scb = sea->connected; /* current control block */ + u_char *data = scb->data; /* current data buffer */ + u_long datalen = scb->datalen; /* current data transfer size */ + struct sea_target *t = &sea->target[scb->xfer->sc_link->target]; + register u_char sts; + u_char msg; + + while ((sts = *sea->STATUS) & STAT_BSY) { + /* We only have a valid SCSI phase when REQ is asserted. */ + if (! (sts & STAT_REQ)) + continue; + if (sts & STAT_PARITY) { + int target = scb->xfer->sc_link->target; + if (++sea->target[target].perrcnt < 8) + printf ("sea%d:%d:%d parity error\n", + sea->sc_link.adapter_unit, target, + scb->xfer->sc_link->lun); + else if (sea->target[target].perrcnt == 8) + printf ("sea%d:%d:%d too many parity errors, not logging any more\n", + sea->sc_link.adapter_unit, target, + scb->xfer->sc_link->lun); + } + switch (sts & REQ_MASK) { + case REQ_DATAOUT: + if (datalen <= 0) { + printf ("sea%d:%d:%d data length underflow\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun); + *sea->DATA = 0; + break; + } + asm ("cld + 1: movb (%%ebx), %%al + xorb $1, %%al + testb $0xf, %%al + jnz 2f + testb $0x10, %%al + jz 1b + lodsb + movb %%al, (%%edi) + loop 1b + 2:" + : "=S" (data), "=c" (datalen) /* output */ + : "D" (sea->DATA), "b" (sea->STATUS), /* input */ + "0" (data), "1" (datalen) + : "eax", "ebx", "edi"); /* clobbered */ + PRINT (("sea%d:%d:%d (DATAOUT) send %ld bytes\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, + scb->datalen - datalen)); + break; + case REQ_DATAIN: + if (datalen <= 0) { + PRINT (("@")); + sts = *sea->DATA; + break; + } + if (datalen >= 512) { + asm (" cld + 1: movb (%%esi), %%al + xorb $5, %%al + testb $0xf, %%al + jnz 2f + testb $0x10, %%al + jz 1b + movb (%%ebx), %%al + stosb + loop 1b + 2:" + : "=D" (data), "=c" (datalen) /* output */ + : "b" (sea->DATA), "S" (sea->STATUS), + "0" (data), "1" (datalen) /* input */ + : "eax", "ebx", "esi"); /* clobbered */ + } else { + asm (" cld + 1: movb (%%esi), %%al + xorb $5, %%al + testb $0xf, %%al + jnz 2f + testb $0x10, %%al + jz 1b + movb (%%ebx), %%al + stosb + movb $1000, %%al + 3: testb $0x10, (%%esi) + jz 4f + dec %%al + jnz 3b + 4: loop 1b + 2:" + : "=D" (data), "=c" (datalen) /* output */ + : "b" (sea->DATA), "S" (sea->STATUS), + "0" (data), "1" (datalen) /* input */ + : "eax", "ebx", "esi"); /* clobbered */ + } + PRINT (("sea%d:%d:%d (DATAIN) got %ld bytes\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, + scb->datalen - datalen)); + break; + case REQ_CMDOUT: + sea_cmd_output (sea, (u_char*) scb->xfer->cmd, + scb->xfer->cmdlen); + break; + case REQ_STATIN: + scb->xfer->status = *sea->DATA; + WAITREQ (t, statin, 2000); + PRINT (("sea%d:%d:%d (STATIN) got 0x%x\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, + (u_char) scb->xfer->status)); + break; + case REQ_MSGOUT: + *sea->DATA = MSG_NOP; + sea_wait_for_req_deassert (sea, 1000, "MSGOUT"); + PRINT (("sea%d:%d:%d (MSGOUT) send NOP\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun)); + break; + case REQ_MSGIN: + /* Don't handle multi-byte messages here, because they + * should not be present here. */ + msg = *sea->DATA; + sea_wait_for_req_deassert (sea, 2000, "MSGIN"); + PRINT (("sea%d:%d:%d (MSGIN) got 0x%x\n", + sea->sc_link.adapter_unit, + scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, msg)); + switch (msg) { + case MSG_COMMAND_COMPLETE: + scb->data = data; + scb->datalen = datalen; + goto done; + case MSG_ABORT: + printf ("sea: command aborted by target\n"); + scb->flags = SCB_ABORTED; + goto done; + case MSG_DISCONNECT: + scb->next = sea->disconnected_queue; + sea->disconnected_queue = scb; + sea->connected = 0; + *sea->CONTROL = CMD_INTR | sea->parity; + if (! sea->irq && ! sea->timeout_active) { + timeout (sea_tick, sea, 1); + sea->timeout_active = 1; + } + return; + case MSG_SAVE_POINTERS: + scb->data = data; + scb->datalen = datalen; + break; + case MSG_RESTORE_POINTERS: + data = scb->data; + datalen = scb->datalen; + break; + case MSG_MESSAGE_REJECT: + PRINT (("sea: message_reject received\n")); + break; + default: + printf ("sea%d:%d:%d unknown message: 0x%x\n", + sea->sc_link.adapter_unit, scb->xfer->sc_link->target, + scb->xfer->sc_link->lun, msg); + break; + } + break; + default: + printf ("sea: unknown phase: %b\n", + sts & REQ_MASK, STAT_BITS); + } + } + printf ("sea%d:%d:%d unexpected target disconnect\n", + sea->sc_link.adapter_unit, scb->xfer->sc_link->target, + scb->xfer->sc_link->lun); + scb->flags = SCB_ERROR; +done: sea->connected = 0; + CLEAR_BUSY (sea, scb); + *sea->CONTROL = CMD_INTR | sea->parity; + sea_done (sea->sc_link.adapter_unit, scb); +} +#endif /* NSEA */