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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [in2000.c] - Rev 1626
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/* * in2000.c - Linux device driver for the * Always IN2000 ISA SCSI card. * * Copyright (c) 1996 John Shifflett, GeoLog Consulting * john@geolog.com * jshiffle@netcom.com * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * * Drew Eckhardt's excellent 'Generic NCR5380' sources provided * much of the inspiration and some of the code for this driver. * The Linux IN2000 driver distributed in the Linux kernels through * version 1.2.13 was an extremely valuable reference on the arcane * (and still mysterious) workings of the IN2000's fifo. It also * is where I lifted in2000_biosparam(), the gist of the card * detection scheme, and other bits of code. Many thanks to the * talented and courageous people who wrote, contributed to, and * maintained that driver (including Brad McLean, Shaun Savage, * Bill Earnest, Larry Doolittle, Roger Sunshine, John Luckey, * Matt Postiff, Peter Lu, zerucha@shell.portal.com, and Eric * Youngdale). I should also mention the driver written by * Hamish Macdonald for the (GASP!) Amiga A2091 card, included * in the Linux-m68k distribution; it gave me a good initial * understanding of the proper way to run a WD33c93 chip, and I * ended up stealing lots of code from it. * * _This_ driver is (I feel) an improvement over the old one in * several respects: * - All problems relating to the data size of a SCSI request are * gone (as far as I know). The old driver couldn't handle * swapping to partitions because that involved 4k blocks, nor * could it deal with the st.c tape driver unmodified, because * that usually involved 4k - 32k blocks. The old driver never * quite got away from a morbid dependence on 2k block sizes - * which of course is the size of the card's fifo. * * - Target Disconnection/Reconnection is now supported. Any * system with more than one device active on the SCSI bus * will benefit from this. The driver defaults to what I'm * calling 'adaptive disconnect' - meaning that each command * is evaluated individually as to whether or not it should * be run with the option to disconnect/reselect (if the * device chooses), or as a "SCSI-bus-hog". * * - Synchronous data transfers are now supported. Because there * are a few devices (and many improperly terminated systems) * that choke when doing sync, the default is sync DISABLED * for all devices. This faster protocol can (and should!) * be enabled on selected devices via the command-line. * * - Runtime operating parameters can now be specified through * either the LILO or the 'insmod' command line. For LILO do: * "in2000=blah,blah,blah" * and with insmod go like: * "insmod /usr/src/linux/modules/in2000.o setup_strings=blah,blah" * The defaults should be good for most people. See the comment * for 'setup_strings' below for more details. * * - The old driver relied exclusively on what the Western Digital * docs call "Combination Level 2 Commands", which are a great * idea in that the CPU is relieved of a lot of interrupt * overhead. However, by accepting a certain (user-settable) * amount of additional interrupts, this driver achieves * better control over the SCSI bus, and data transfers are * almost as fast while being much easier to define, track, * and debug. * * - You can force detection of a card whose BIOS has been disabled. * * - Multiple IN2000 cards might almost be supported. I've tried to * keep it in mind, but have no way to test... * * * TODO: * tagged queuing. multiple cards. * * * NOTE: * When using this or any other SCSI driver as a module, you'll * find that with the stock kernel, at most _two_ SCSI hard * drives will be linked into the device list (ie, usable). * If your IN2000 card has more than 2 disks on its bus, you * might want to change the define of 'SD_EXTRA_DEVS' in the * 'hosts.h' file from 2 to whatever is appropriate. It took * me a while to track down this surprisingly obscure and * undocumented little "feature". * * * People with bug reports, wish-lists, complaints, comments, * or improvements are asked to pah-leeez email me (John Shifflett) * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get * this thing into as good a shape as possible, and I'm positive * there are lots of lurking bugs and "Stupid Places". * */ #include <linux/module.h> #include <asm/system.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/delay.h> #include <linux/proc_fs.h> #include <asm/io.h> #include <linux/ioport.h> #include <linux/blkdev.h> #include <linux/blk.h> #include <linux/stat.h> #include "scsi.h" #include "sd.h" #include "hosts.h" #define IN2000_VERSION "1.33" #define IN2000_DATE "26/August/1998" #include "in2000.h" /* * 'setup_strings' is a single string used to pass operating parameters and * settings from the kernel/module command-line to the driver. 'setup_args[]' * is an array of strings that define the compile-time default values for * these settings. If Linux boots with a LILO or insmod command-line, those * settings are combined with 'setup_args[]'. Note that LILO command-lines * are prefixed with "in2000=" while insmod uses a "setup_strings=" prefix. * The driver recognizes the following keywords (lower case required) and * arguments: * * - ioport:addr -Where addr is IO address of a (usually ROM-less) card. * - noreset -No optional args. Prevents SCSI bus reset at boot time. * - nosync:x -x is a bitmask where the 1st 7 bits correspond with * the 7 possible SCSI devices (bit 0 for device #0, etc). * Set a bit to PREVENT sync negotiation on that device. * The driver default is sync DISABLED on all devices. * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer * period. Default is 500; acceptable values are 250 - 1000. * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. * x = 1 does 'adaptive' disconnects, which is the default * and generally the best choice. * - debug:x -If 'DEBUGGING_ON' is defined, x is a bitmask that causes * various types of debug output to printed - see the DB_xxx * defines in in2000.h * - proc:x -If 'PROC_INTERFACE' is defined, x is a bitmask that * determines how the /proc interface works and what it * does - see the PR_xxx defines in in2000.h * * Syntax Notes: * - Numeric arguments can be decimal or the '0x' form of hex notation. There * _must_ be a colon between a keyword and its numeric argument, with no * spaces. * - Keywords are separated by commas, no spaces, in the standard kernel * command-line manner. * - A keyword in the 'nth' comma-separated command-line member will overwrite * the 'nth' element of setup_args[]. A blank command-line member (in * other words, a comma with no preceding keyword) will _not_ overwrite * the corresponding setup_args[] element. * * A few LILO examples (for insmod, use 'setup_strings' instead of 'in2000'): * - in2000=ioport:0x220,noreset * - in2000=period:250,disconnect:2,nosync:0x03 * - in2000=debug:0x1e * - in2000=proc:3 */ /* Normally, no defaults are specified... */ static char *setup_args[] = {"","","","","","","","",""}; /* filled in by 'insmod' */ static char *setup_strings = 0; #ifdef MODULE_PARM MODULE_PARM(setup_strings, "s"); #endif static struct Scsi_Host *instance_list = 0; static inline uchar read_3393(struct IN2000_hostdata *hostdata, uchar reg_num) { write1_io(reg_num,IO_WD_ADDR); return read1_io(IO_WD_DATA); } #define READ_AUX_STAT() read1_io(IO_WD_ASR) static inline void write_3393(struct IN2000_hostdata *hostdata, uchar reg_num, uchar value) { write1_io(reg_num,IO_WD_ADDR); write1_io(value,IO_WD_DATA); } static inline void write_3393_cmd(struct IN2000_hostdata *hostdata, uchar cmd) { /* while (READ_AUX_STAT() & ASR_CIP) printk("|");*/ write1_io(WD_COMMAND,IO_WD_ADDR); write1_io(cmd,IO_WD_DATA); } static uchar read_1_byte(struct IN2000_hostdata *hostdata) { uchar asr, x = 0; write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write_3393_cmd(hostdata,WD_CMD_TRANS_INFO|0x80); do { asr = READ_AUX_STAT(); if (asr & ASR_DBR) x = read_3393(hostdata,WD_DATA); } while (!(asr & ASR_INT)); return x; } static void write_3393_count(struct IN2000_hostdata *hostdata, unsigned long value) { write1_io(WD_TRANSFER_COUNT_MSB,IO_WD_ADDR); write1_io((value >> 16),IO_WD_DATA); write1_io((value >> 8),IO_WD_DATA); write1_io(value,IO_WD_DATA); } static unsigned long read_3393_count(struct IN2000_hostdata *hostdata) { unsigned long value; write1_io(WD_TRANSFER_COUNT_MSB,IO_WD_ADDR); value = read1_io(IO_WD_DATA) << 16; value |= read1_io(IO_WD_DATA) << 8; value |= read1_io(IO_WD_DATA); return value; } /* The 33c93 needs to be told which direction a command transfers its * data; we use this function to figure it out. Returns true if there * will be a DATA_OUT phase with this command, false otherwise. * (Thanks to Joerg Dorchain for the research and suggestion.) */ static int is_dir_out(Scsi_Cmnd *cmd) { switch (cmd->cmnd[0]) { case WRITE_6: case WRITE_10: case WRITE_12: case WRITE_LONG: case WRITE_SAME: case WRITE_BUFFER: case WRITE_VERIFY: case WRITE_VERIFY_12: case COMPARE: case COPY: case COPY_VERIFY: case SEARCH_EQUAL: case SEARCH_HIGH: case SEARCH_LOW: case SEARCH_EQUAL_12: case SEARCH_HIGH_12: case SEARCH_LOW_12: case FORMAT_UNIT: case REASSIGN_BLOCKS: case RESERVE: case MODE_SELECT: case MODE_SELECT_10: case LOG_SELECT: case SEND_DIAGNOSTIC: case CHANGE_DEFINITION: case UPDATE_BLOCK: case SET_WINDOW: case MEDIUM_SCAN: case SEND_VOLUME_TAG: case 0xea: return 1; default: return 0; } } static struct sx_period sx_table[] = { { 1, 0x20}, {252, 0x20}, {376, 0x30}, {500, 0x40}, {624, 0x50}, {752, 0x60}, {876, 0x70}, {1000,0x00}, {0, 0} }; static int round_period(unsigned int period) { int x; for (x=1; sx_table[x].period_ns; x++) { if ((period <= sx_table[x-0].period_ns) && (period > sx_table[x-1].period_ns)) { return x; } } return 7; } static uchar calc_sync_xfer(unsigned int period, unsigned int offset) { uchar result; period *= 4; /* convert SDTR code to ns */ result = sx_table[round_period(period)].reg_value; result |= (offset < OPTIMUM_SX_OFF)?offset:OPTIMUM_SX_OFF; return result; } static void in2000_execute(struct Scsi_Host *instance); int in2000_queuecommand (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) { struct IN2000_hostdata *hostdata; Scsi_Cmnd *tmp; unsigned long flags; hostdata = (struct IN2000_hostdata *)cmd->host->hostdata; DB(DB_QUEUE_COMMAND,printk("Q-%d-%02x-%ld(",cmd->target,cmd->cmnd[0],cmd->pid)) /* Set up a few fields in the Scsi_Cmnd structure for our own use: * - host_scribble is the pointer to the next cmd in the input queue * - scsi_done points to the routine we call when a cmd is finished * - result is what you'd expect */ cmd->host_scribble = NULL; cmd->scsi_done = done; cmd->result = 0; /* We use the Scsi_Pointer structure that's included with each command * as a scratchpad (as it's intended to be used!). The handy thing about * the SCp.xxx fields is that they're always associated with a given * cmd, and are preserved across disconnect-reselect. This means we * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages * if we keep all the critical pointers and counters in SCp: * - SCp.ptr is the pointer into the RAM buffer * - SCp.this_residual is the size of that buffer * - SCp.buffer points to the current scatter-gather buffer * - SCp.buffers_residual tells us how many S.G. buffers there are * - SCp.have_data_in helps keep track of >2048 byte transfers * - SCp.sent_command is not used * - SCp.phase records this command's SRCID_ER bit setting */ if (cmd->use_sg) { cmd->SCp.buffer = (struct scatterlist *)cmd->buffer; cmd->SCp.buffers_residual = cmd->use_sg - 1; cmd->SCp.ptr = (char *)cmd->SCp.buffer->address; cmd->SCp.this_residual = cmd->SCp.buffer->length; } else { cmd->SCp.buffer = NULL; cmd->SCp.buffers_residual = 0; cmd->SCp.ptr = (char *)cmd->request_buffer; cmd->SCp.this_residual = cmd->request_bufflen; } cmd->SCp.have_data_in = 0; /* We don't set SCp.phase here - that's done in in2000_execute() */ /* WD docs state that at the conclusion of a "LEVEL2" command, the * status byte can be retrieved from the LUN register. Apparently, * this is the case only for *uninterrupted* LEVEL2 commands! If * there are any unexpected phases entered, even if they are 100% * legal (different devices may choose to do things differently), * the LEVEL2 command sequence is exited. This often occurs prior * to receiving the status byte, in which case the driver does a * status phase interrupt and gets the status byte on its own. * While such a command can then be "resumed" (ie restarted to * finish up as a LEVEL2 command), the LUN register will NOT be * a valid status byte at the command's conclusion, and we must * use the byte obtained during the earlier interrupt. Here, we * preset SCp.Status to an illegal value (0xff) so that when * this command finally completes, we can tell where the actual * status byte is stored. */ cmd->SCp.Status = ILLEGAL_STATUS_BYTE; /* We need to disable interrupts before messing with the input * queue and calling in2000_execute(). */ save_flags(flags); cli(); /* * Add the cmd to the end of 'input_Q'. Note that REQUEST_SENSE * commands are added to the head of the queue so that the desired * sense data is not lost before REQUEST_SENSE executes. */ if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { cmd->host_scribble = (uchar *)hostdata->input_Q; hostdata->input_Q = cmd; } else { /* find the end of the queue */ for (tmp=(Scsi_Cmnd *)hostdata->input_Q; tmp->host_scribble; tmp=(Scsi_Cmnd *)tmp->host_scribble) ; tmp->host_scribble = (uchar *)cmd; } /* We know that there's at least one command in 'input_Q' now. * Go see if any of them are runnable! */ in2000_execute(cmd->host); DB(DB_QUEUE_COMMAND,printk(")Q-%ld ",cmd->pid)) restore_flags(flags); return 0; } /* * This routine attempts to start a scsi command. If the host_card is * already connected, we give up immediately. Otherwise, look through * the input_Q, using the first command we find that's intended * for a currently non-busy target/lun. * Note that this function is always called with interrupts already * disabled (either from in2000_queuecommand() or in2000_intr()). */ static void in2000_execute (struct Scsi_Host *instance) { struct IN2000_hostdata *hostdata; Scsi_Cmnd *cmd, *prev; int i; unsigned short *sp; unsigned short f; unsigned short flushbuf[16]; hostdata = (struct IN2000_hostdata *)instance->hostdata; DB(DB_EXECUTE,printk("EX(")) if (hostdata->selecting || hostdata->connected) { DB(DB_EXECUTE,printk(")EX-0 ")) return; } /* * Search through the input_Q for a command destined * for an idle target/lun. */ cmd = (Scsi_Cmnd *)hostdata->input_Q; prev = 0; while (cmd) { if (!(hostdata->busy[cmd->target] & (1 << cmd->lun))) break; prev = cmd; cmd = (Scsi_Cmnd *)cmd->host_scribble; } /* quit if queue empty or all possible targets are busy */ if (!cmd) { DB(DB_EXECUTE,printk(")EX-1 ")) return; } /* remove command from queue */ if (prev) prev->host_scribble = cmd->host_scribble; else hostdata->input_Q = (Scsi_Cmnd *)cmd->host_scribble; #ifdef PROC_STATISTICS hostdata->cmd_cnt[cmd->target]++; #endif /* * Start the selection process */ if (is_dir_out(cmd)) write_3393(hostdata,WD_DESTINATION_ID, cmd->target); else write_3393(hostdata,WD_DESTINATION_ID, cmd->target | DSTID_DPD); /* Now we need to figure out whether or not this command is a good * candidate for disconnect/reselect. We guess to the best of our * ability, based on a set of hierarchical rules. When several * devices are operating simultaneously, disconnects are usually * an advantage. In a single device system, or if only 1 device * is being accessed, transfers usually go faster if disconnects * are not allowed: * * + Commands should NEVER disconnect if hostdata->disconnect = * DIS_NEVER (this holds for tape drives also), and ALWAYS * disconnect if hostdata->disconnect = DIS_ALWAYS. * + Tape drive commands should always be allowed to disconnect. * + Disconnect should be allowed if disconnected_Q isn't empty. * + Commands should NOT disconnect if input_Q is empty. * + Disconnect should be allowed if there are commands in input_Q * for a different target/lun. In this case, the other commands * should be made disconnect-able, if not already. * * I know, I know - this code would flunk me out of any * "C Programming 101" class ever offered. But it's easy * to change around and experiment with for now. */ cmd->SCp.phase = 0; /* assume no disconnect */ if (hostdata->disconnect == DIS_NEVER) goto no; if (hostdata->disconnect == DIS_ALWAYS) goto yes; if (cmd->device->type == 1) /* tape drive? */ goto yes; if (hostdata->disconnected_Q) /* other commands disconnected? */ goto yes; if (!(hostdata->input_Q)) /* input_Q empty? */ goto no; for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev; prev=(Scsi_Cmnd *)prev->host_scribble) { if ((prev->target != cmd->target) || (prev->lun != cmd->lun)) { for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev; prev=(Scsi_Cmnd *)prev->host_scribble) prev->SCp.phase = 1; goto yes; } } goto no; yes: cmd->SCp.phase = 1; #ifdef PROC_STATISTICS hostdata->disc_allowed_cnt[cmd->target]++; #endif no: write_3393(hostdata,WD_SOURCE_ID,((cmd->SCp.phase)?SRCID_ER:0)); write_3393(hostdata,WD_TARGET_LUN, cmd->lun); write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]); hostdata->busy[cmd->target] |= (1 << cmd->lun); if ((hostdata->level2 <= L2_NONE) || (hostdata->sync_stat[cmd->target] == SS_UNSET)) { /* * Do a 'Select-With-ATN' command. This will end with * one of the following interrupts: * CSR_RESEL_AM: failure - can try again later. * CSR_TIMEOUT: failure - give up. * CSR_SELECT: success - proceed. */ hostdata->selecting = cmd; /* Every target has its own synchronous transfer setting, kept in * the sync_xfer array, and a corresponding status byte in sync_stat[]. * Each target's sync_stat[] entry is initialized to SS_UNSET, and its * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET * means that the parameters are undetermined as yet, and that we * need to send an SDTR message to this device after selection is * complete. We set SS_FIRST to tell the interrupt routine to do so, * unless we don't want to even _try_ synchronous transfers: In this * case we set SS_SET to make the defaults final. */ if (hostdata->sync_stat[cmd->target] == SS_UNSET) { if (hostdata->sync_off & (1 << cmd->target)) hostdata->sync_stat[cmd->target] = SS_SET; else hostdata->sync_stat[cmd->target] = SS_FIRST; } hostdata->state = S_SELECTING; write_3393_count(hostdata,0); /* this guarantees a DATA_PHASE interrupt */ write_3393_cmd(hostdata,WD_CMD_SEL_ATN); } else { /* * Do a 'Select-With-ATN-Xfer' command. This will end with * one of the following interrupts: * CSR_RESEL_AM: failure - can try again later. * CSR_TIMEOUT: failure - give up. * anything else: success - proceed. */ hostdata->connected = cmd; write_3393(hostdata,WD_COMMAND_PHASE, 0); /* copy command_descriptor_block into WD chip * (take advantage of auto-incrementing) */ write1_io(WD_CDB_1, IO_WD_ADDR); for (i=0; i<cmd->cmd_len; i++) write1_io(cmd->cmnd[i], IO_WD_DATA); /* The wd33c93 only knows about Group 0, 1, and 5 commands when * it's doing a 'select-and-transfer'. To be safe, we write the * size of the CDB into the OWN_ID register for every case. This * way there won't be problems with vendor-unique, audio, etc. */ write_3393(hostdata, WD_OWN_ID, cmd->cmd_len); /* When doing a non-disconnect command, we can save ourselves a DATA * phase interrupt later by setting everything up now. With writes we * need to pre-fill the fifo; if there's room for the 32 flush bytes, * put them in there too - that'll avoid a fifo interrupt. Reads are * somewhat simpler. * KLUDGE NOTE: It seems that you can't completely fill the fifo here: * This results in the IO_FIFO_COUNT register rolling over to zero, * and apparently the gate array logic sees this as empty, not full, * so the 3393 chip is never signalled to start reading from the * fifo. Or maybe it's seen as a permanent fifo interrupt condition. * Regardless, we fix this by temporarily pretending that the fifo * is 16 bytes smaller. (I see now that the old driver has a comment * about "don't fill completely" in an analogous place - must be the * same deal.) This results in CDROM, swap partitions, and tape drives * needing an extra interrupt per write command - I think we can live * with that! */ if (!(cmd->SCp.phase)) { write_3393_count(hostdata, cmd->SCp.this_residual); write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS); write1_io(0, IO_FIFO_WRITE); /* clear fifo counter, write mode */ if (is_dir_out(cmd)) { hostdata->fifo = FI_FIFO_WRITING; if ((i = cmd->SCp.this_residual) > (IN2000_FIFO_SIZE - 16) ) i = IN2000_FIFO_SIZE - 16; cmd->SCp.have_data_in = i; /* this much data in fifo */ i >>= 1; /* Gulp. Assuming modulo 2. */ sp = (unsigned short *)cmd->SCp.ptr; f = hostdata->io_base + IO_FIFO; #ifdef FAST_WRITE_IO FAST_WRITE2_IO(); #else while (i--) write2_io(*sp++,IO_FIFO); #endif /* Is there room for the flush bytes? */ if (cmd->SCp.have_data_in <= ((IN2000_FIFO_SIZE - 16) - 32)) { sp = flushbuf; i = 16; #ifdef FAST_WRITE_IO FAST_WRITE2_IO(); #else while (i--) write2_io(0,IO_FIFO); #endif } } else { write1_io(0, IO_FIFO_READ); /* put fifo in read mode */ hostdata->fifo = FI_FIFO_READING; cmd->SCp.have_data_in = 0; /* nothing transfered yet */ } } else { write_3393_count(hostdata,0); /* this guarantees a DATA_PHASE interrupt */ } hostdata->state = S_RUNNING_LEVEL2; write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); } /* * Since the SCSI bus can handle only 1 connection at a time, * we get out of here now. If the selection fails, or when * the command disconnects, we'll come back to this routine * to search the input_Q again... */ DB(DB_EXECUTE,printk("%s%ld)EX-2 ",(cmd->SCp.phase)?"d:":"",cmd->pid)) } static void transfer_pio(uchar *buf, int cnt, int data_in_dir, struct IN2000_hostdata *hostdata) { uchar asr; DB(DB_TRANSFER,printk("(%p,%d,%s)",buf,cnt,data_in_dir?"in":"out")) write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write_3393_count(hostdata,cnt); write_3393_cmd(hostdata,WD_CMD_TRANS_INFO); if (data_in_dir) { do { asr = READ_AUX_STAT(); if (asr & ASR_DBR) *buf++ = read_3393(hostdata,WD_DATA); } while (!(asr & ASR_INT)); } else { do { asr = READ_AUX_STAT(); if (asr & ASR_DBR) write_3393(hostdata,WD_DATA, *buf++); } while (!(asr & ASR_INT)); } /* Note: we are returning with the interrupt UN-cleared. * Since (presumably) an entire I/O operation has * completed, the bus phase is probably different, and * the interrupt routine will discover this when it * responds to the uncleared int. */ } static void transfer_bytes(Scsi_Cmnd *cmd, int data_in_dir) { struct IN2000_hostdata *hostdata; unsigned short *sp; unsigned short f; int i; hostdata = (struct IN2000_hostdata *)cmd->host->hostdata; /* Normally, you'd expect 'this_residual' to be non-zero here. * In a series of scatter-gather transfers, however, this * routine will usually be called with 'this_residual' equal * to 0 and 'buffers_residual' non-zero. This means that a * previous transfer completed, clearing 'this_residual', and * now we need to setup the next scatter-gather buffer as the * source or destination for THIS transfer. */ if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { ++cmd->SCp.buffer; --cmd->SCp.buffers_residual; cmd->SCp.this_residual = cmd->SCp.buffer->length; cmd->SCp.ptr = cmd->SCp.buffer->address; } /* Set up hardware registers */ write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]); write_3393_count(hostdata,cmd->SCp.this_residual); write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS); write1_io(0,IO_FIFO_WRITE); /* zero counter, assume write */ /* Reading is easy. Just issue the command and return - we'll * get an interrupt later when we have actual data to worry about. */ if (data_in_dir) { write1_io(0,IO_FIFO_READ); if ((hostdata->level2 >= L2_DATA) || (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { write_3393(hostdata,WD_COMMAND_PHASE,0x45); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); hostdata->state = S_RUNNING_LEVEL2; } else write_3393_cmd(hostdata,WD_CMD_TRANS_INFO); hostdata->fifo = FI_FIFO_READING; cmd->SCp.have_data_in = 0; return; } /* Writing is more involved - we'll start the WD chip and write as * much data to the fifo as we can right now. Later interrupts will * write any bytes that don't make it at this stage. */ if ((hostdata->level2 >= L2_DATA) || (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { write_3393(hostdata,WD_COMMAND_PHASE,0x45); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); hostdata->state = S_RUNNING_LEVEL2; } else write_3393_cmd(hostdata,WD_CMD_TRANS_INFO); hostdata->fifo = FI_FIFO_WRITING; sp = (unsigned short *)cmd->SCp.ptr; if ((i = cmd->SCp.this_residual) > IN2000_FIFO_SIZE) i = IN2000_FIFO_SIZE; cmd->SCp.have_data_in = i; i >>= 1; /* Gulp. We assume this_residual is modulo 2 */ f = hostdata->io_base + IO_FIFO; #ifdef FAST_WRITE_IO FAST_WRITE2_IO(); #else while (i--) write2_io(*sp++,IO_FIFO); #endif } /* We need to use spin_lock_irqsave() & spin_unlock_irqrestore() in this * function in order to work in an SMP environment. (I'd be surprised * if the driver is ever used by anyone on a real multi-CPU motherboard, * but it _does_ need to be able to compile and run in an SMP kernel.) */ static void in2000_intr (int irqnum, void * dev_id, struct pt_regs *ptregs) { struct Scsi_Host *instance; struct IN2000_hostdata *hostdata; Scsi_Cmnd *patch, *cmd; uchar asr, sr, phs, id, lun, *ucp, msg; int i,j; unsigned long length; unsigned short *sp; unsigned short f; unsigned long flags; for (instance = instance_list; instance; instance = instance->next) { if (instance->irq == irqnum) break; } if (!instance) { printk("*** Hmm... interrupts are screwed up! ***\n"); return; } hostdata = (struct IN2000_hostdata *)instance->hostdata; /* Get the spin_lock and disable further ints, for SMP */ CLISPIN_LOCK(flags); #ifdef PROC_STATISTICS hostdata->int_cnt++; #endif /* The IN2000 card has 2 interrupt sources OR'ed onto its IRQ line - the * WD3393 chip and the 2k fifo (which is actually a dual-port RAM combined * with a big logic array, so it's a little different than what you might * expect). As far as I know, there's no reason that BOTH can't be active * at the same time, but there's a problem: while we can read the 3393 * to tell if _it_ wants an interrupt, I don't know of a way to ask the * fifo the same question. The best we can do is check the 3393 and if * it _isn't_ the source of the interrupt, then we can be pretty sure * that the fifo is the culprit. * UPDATE: I have it on good authority (Bill Earnest) that bit 0 of the * IO_FIFO_COUNT register mirrors the fifo interrupt state. I * assume that bit clear means interrupt active. As it turns * out, the driver really doesn't need to check for this after * all, so my remarks above about a 'problem' can safely be * ignored. The way the logic is set up, there's no advantage * (that I can see) to worrying about it. * * It seems that the fifo interrupt signal is negated when we extract * bytes during read or write bytes during write. * - fifo will interrupt when data is moving from it to the 3393, and * there are 31 (or less?) bytes left to go. This is sort of short- * sighted: what if you don't WANT to do more? In any case, our * response is to push more into the fifo - either actual data or * dummy bytes if need be. Note that we apparently have to write at * least 32 additional bytes to the fifo after an interrupt in order * to get it to release the ones it was holding on to - writing fewer * than 32 will result in another fifo int. * UPDATE: Again, info from Bill Earnest makes this more understandable: * 32 bytes = two counts of the fifo counter register. He tells * me that the fifo interrupt is a non-latching signal derived * from a straightforward boolean interpretation of the 7 * highest bits of the fifo counter and the fifo-read/fifo-write * state. Who'd a thought? */ write1_io(0, IO_LED_ON); asr = READ_AUX_STAT(); if (!(asr & ASR_INT)) { /* no WD33c93 interrupt? */ /* Ok. This is definitely a FIFO-only interrupt. * * If FI_FIFO_READING is set, there are up to 2048 bytes waiting to be read, * maybe more to come from the SCSI bus. Read as many as we can out of the * fifo and into memory at the location of SCp.ptr[SCp.have_data_in], and * update have_data_in afterwards. * * If we have FI_FIFO_WRITING, the FIFO has almost run out of bytes to move * into the WD3393 chip (I think the interrupt happens when there are 31 * bytes left, but it may be fewer...). The 3393 is still waiting, so we * shove some more into the fifo, which gets things moving again. If the * original SCSI command specified more than 2048 bytes, there may still * be some of that data left: fine - use it (from SCp.ptr[SCp.have_data_in]). * Don't forget to update have_data_in. If we've already written out the * entire buffer, feed 32 dummy bytes to the fifo - they're needed to * push out the remaining real data. * (Big thanks to Bill Earnest for getting me out of the mud in here.) */ cmd = (Scsi_Cmnd *)hostdata->connected; /* assume we're connected */ CHECK_NULL(cmd,"fifo_int") if (hostdata->fifo == FI_FIFO_READING) { DB(DB_FIFO,printk("{R:%02x} ",read1_io(IO_FIFO_COUNT))) sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in); i = read1_io(IO_FIFO_COUNT) & 0xfe; i <<= 2; /* # of words waiting in the fifo */ f = hostdata->io_base + IO_FIFO; #ifdef FAST_READ_IO FAST_READ2_IO(); #else while (i--) *sp++ = read2_io(IO_FIFO); #endif i = sp - (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in); i <<= 1; cmd->SCp.have_data_in += i; } else if (hostdata->fifo == FI_FIFO_WRITING) { DB(DB_FIFO,printk("{W:%02x} ",read1_io(IO_FIFO_COUNT))) /* If all bytes have been written to the fifo, flush out the stragglers. * Note that while writing 16 dummy words seems arbitrary, we don't * have another choice that I can see. What we really want is to read * the 3393 transfer count register (that would tell us how many bytes * needed flushing), but the TRANSFER_INFO command hasn't completed * yet (not enough bytes!) and that register won't be accessible. So, * we use 16 words - a number obtained through trial and error. * UPDATE: Bill says this is exactly what Always does, so there. * More thanks due him for help in this section. */ if (cmd->SCp.this_residual == cmd->SCp.have_data_in) { i = 16; while (i--) /* write 32 dummy bytes */ write2_io(0,IO_FIFO); } /* If there are still bytes left in the SCSI buffer, write as many as we * can out to the fifo. */ else { sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in); i = cmd->SCp.this_residual - cmd->SCp.have_data_in; /* bytes yet to go */ j = read1_io(IO_FIFO_COUNT) & 0xfe; j <<= 2; /* how many words the fifo has room for */ if ((j << 1) > i) j = (i >> 1); while (j--) write2_io(*sp++,IO_FIFO); i = sp - (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in); i <<= 1; cmd->SCp.have_data_in += i; } } else { printk("*** Spurious FIFO interrupt ***"); } write1_io(0, IO_LED_OFF); /* release the SMP spin_lock and restore irq state */ CLISPIN_UNLOCK(flags); return; } /* This interrupt was triggered by the WD33c93 chip. The fifo interrupt * may also be asserted, but we don't bother to check it: we get more * detailed info from FIFO_READING and FIFO_WRITING (see below). */ cmd = (Scsi_Cmnd *)hostdata->connected; /* assume we're connected */ sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear the interrupt */ phs = read_3393(hostdata,WD_COMMAND_PHASE); if (!cmd && (sr != CSR_RESEL_AM && sr != CSR_TIMEOUT && sr != CSR_SELECT)) { printk("\nNR:wd-intr-1\n"); write1_io(0, IO_LED_OFF); /* release the SMP spin_lock and restore irq state */ CLISPIN_UNLOCK(flags); return; } DB(DB_INTR,printk("{%02x:%02x-",asr,sr)) /* After starting a FIFO-based transfer, the next _WD3393_ interrupt is * guaranteed to be in response to the completion of the transfer. * If we were reading, there's probably data in the fifo that needs * to be copied into RAM - do that here. Also, we have to update * 'this_residual' and 'ptr' based on the contents of the * TRANSFER_COUNT register, in case the device decided to do an * intermediate disconnect (a device may do this if it has to * do a seek, or just to be nice and let other devices have * some bus time during long transfers). * After doing whatever is necessary with the fifo, we go on and * service the WD3393 interrupt normally. */ if (hostdata->fifo == FI_FIFO_READING) { /* buffer index = start-of-buffer + #-of-bytes-already-read */ sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in); /* bytes remaining in fifo = (total-wanted - #-not-got) - #-already-read */ i = (cmd->SCp.this_residual - read_3393_count(hostdata)) - cmd->SCp.have_data_in; i >>= 1; /* Gulp. We assume this will always be modulo 2 */ f = hostdata->io_base + IO_FIFO; #ifdef FAST_READ_IO FAST_READ2_IO(); #else while (i--) *sp++ = read2_io(IO_FIFO); #endif hostdata->fifo = FI_FIFO_UNUSED; length = cmd->SCp.this_residual; cmd->SCp.this_residual = read_3393_count(hostdata); cmd->SCp.ptr += (length - cmd->SCp.this_residual); DB(DB_TRANSFER,printk("(%p,%d)",cmd->SCp.ptr,cmd->SCp.this_residual)) } else if (hostdata->fifo == FI_FIFO_WRITING) { hostdata->fifo = FI_FIFO_UNUSED; length = cmd->SCp.this_residual; cmd->SCp.this_residual = read_3393_count(hostdata); cmd->SCp.ptr += (length - cmd->SCp.this_residual); DB(DB_TRANSFER,printk("(%p,%d)",cmd->SCp.ptr,cmd->SCp.this_residual)) } /* Respond to the specific WD3393 interrupt - there are quite a few! */ switch (sr) { case CSR_TIMEOUT: DB(DB_INTR,printk("TIMEOUT")) if (hostdata->state == S_RUNNING_LEVEL2) hostdata->connected = NULL; else { cmd = (Scsi_Cmnd *)hostdata->selecting; /* get a valid cmd */ CHECK_NULL(cmd,"csr_timeout") hostdata->selecting = NULL; } cmd->result = DID_NO_CONNECT << 16; hostdata->busy[cmd->target] &= ~(1 << cmd->lun); hostdata->state = S_UNCONNECTED; cmd->scsi_done(cmd); /* We are not connected to a target - check to see if there * are commands waiting to be executed. */ in2000_execute(instance); break; /* Note: this interrupt should not occur in a LEVEL2 command */ case CSR_SELECT: DB(DB_INTR,printk("SELECT")) hostdata->connected = cmd = (Scsi_Cmnd *)hostdata->selecting; CHECK_NULL(cmd,"csr_select") hostdata->selecting = NULL; /* construct an IDENTIFY message with correct disconnect bit */ hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->lun); if (cmd->SCp.phase) hostdata->outgoing_msg[0] |= 0x40; if (hostdata->sync_stat[cmd->target] == SS_FIRST) { #ifdef SYNC_DEBUG printk(" sending SDTR "); #endif hostdata->sync_stat[cmd->target] = SS_WAITING; /* tack on a 2nd message to ask about synchronous transfers */ hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; hostdata->outgoing_msg[2] = 3; hostdata->outgoing_msg[3] = EXTENDED_SDTR; hostdata->outgoing_msg[4] = OPTIMUM_SX_PER/4; hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF; hostdata->outgoing_len = 6; } else hostdata->outgoing_len = 1; hostdata->state = S_CONNECTED; break; case CSR_XFER_DONE|PHS_DATA_IN: case CSR_UNEXP |PHS_DATA_IN: case CSR_SRV_REQ |PHS_DATA_IN: DB(DB_INTR,printk("IN-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual)) transfer_bytes(cmd, DATA_IN_DIR); if (hostdata->state != S_RUNNING_LEVEL2) hostdata->state = S_CONNECTED; break; case CSR_XFER_DONE|PHS_DATA_OUT: case CSR_UNEXP |PHS_DATA_OUT: case CSR_SRV_REQ |PHS_DATA_OUT: DB(DB_INTR,printk("OUT-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual)) transfer_bytes(cmd, DATA_OUT_DIR); if (hostdata->state != S_RUNNING_LEVEL2) hostdata->state = S_CONNECTED; break; /* Note: this interrupt should not occur in a LEVEL2 command */ case CSR_XFER_DONE|PHS_COMMAND: case CSR_UNEXP |PHS_COMMAND: case CSR_SRV_REQ |PHS_COMMAND: DB(DB_INTR,printk("CMND-%02x,%ld",cmd->cmnd[0],cmd->pid)) transfer_pio(cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, hostdata); hostdata->state = S_CONNECTED; break; case CSR_XFER_DONE|PHS_STATUS: case CSR_UNEXP |PHS_STATUS: case CSR_SRV_REQ |PHS_STATUS: DB(DB_INTR,printk("STATUS=")) cmd->SCp.Status = read_1_byte(hostdata); DB(DB_INTR,printk("%02x",cmd->SCp.Status)) if (hostdata->level2 >= L2_BASIC) { sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */ hostdata->state = S_RUNNING_LEVEL2; write_3393(hostdata,WD_COMMAND_PHASE, 0x50); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); } else { hostdata->state = S_CONNECTED; } break; case CSR_XFER_DONE|PHS_MESS_IN: case CSR_UNEXP |PHS_MESS_IN: case CSR_SRV_REQ |PHS_MESS_IN: DB(DB_INTR,printk("MSG_IN=")) msg = read_1_byte(hostdata); sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */ hostdata->incoming_msg[hostdata->incoming_ptr] = msg; if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) msg = EXTENDED_MESSAGE; else hostdata->incoming_ptr = 0; cmd->SCp.Message = msg; switch (msg) { case COMMAND_COMPLETE: DB(DB_INTR,printk("CCMP-%ld",cmd->pid)) write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_PRE_CMP_DISC; break; case SAVE_POINTERS: DB(DB_INTR,printk("SDP")) write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; case RESTORE_POINTERS: DB(DB_INTR,printk("RDP")) if (hostdata->level2 >= L2_BASIC) { write_3393(hostdata,WD_COMMAND_PHASE, 0x45); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); hostdata->state = S_RUNNING_LEVEL2; } else { write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; } break; case DISCONNECT: DB(DB_INTR,printk("DIS")) cmd->device->disconnect = 1; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_PRE_TMP_DISC; break; case MESSAGE_REJECT: DB(DB_INTR,printk("REJ")) #ifdef SYNC_DEBUG printk("-REJ-"); #endif if (hostdata->sync_stat[cmd->target] == SS_WAITING) hostdata->sync_stat[cmd->target] = SS_SET; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; case EXTENDED_MESSAGE: DB(DB_INTR,printk("EXT")) ucp = hostdata->incoming_msg; #ifdef SYNC_DEBUG printk("%02x",ucp[hostdata->incoming_ptr]); #endif /* Is this the last byte of the extended message? */ if ((hostdata->incoming_ptr >= 2) && (hostdata->incoming_ptr == (ucp[1] + 1))) { switch (ucp[2]) { /* what's the EXTENDED code? */ case EXTENDED_SDTR: id = calc_sync_xfer(ucp[3],ucp[4]); if (hostdata->sync_stat[cmd->target] != SS_WAITING) { /* A device has sent an unsolicited SDTR message; rather than go * through the effort of decoding it and then figuring out what * our reply should be, we're just gonna say that we have a * synchronous fifo depth of 0. This will result in asynchronous * transfers - not ideal but so much easier. * Actually, this is OK because it assures us that if we don't * specifically ask for sync transfers, we won't do any. */ write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */ hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; hostdata->outgoing_msg[1] = 3; hostdata->outgoing_msg[2] = EXTENDED_SDTR; hostdata->outgoing_msg[3] = hostdata->default_sx_per/4; hostdata->outgoing_msg[4] = 0; hostdata->outgoing_len = 5; hostdata->sync_xfer[cmd->target] = calc_sync_xfer(hostdata->default_sx_per/4,0); } else { hostdata->sync_xfer[cmd->target] = id; } #ifdef SYNC_DEBUG printk("sync_xfer=%02x",hostdata->sync_xfer[cmd->target]); #endif hostdata->sync_stat[cmd->target] = SS_SET; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; case EXTENDED_WDTR: write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */ printk("sending WDTR "); hostdata->outgoing_msg[0] = EXTENDED_MESSAGE; hostdata->outgoing_msg[1] = 2; hostdata->outgoing_msg[2] = EXTENDED_WDTR; hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ hostdata->outgoing_len = 4; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; default: write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */ printk("Rejecting Unknown Extended Message(%02x). ",ucp[2]); hostdata->outgoing_msg[0] = MESSAGE_REJECT; hostdata->outgoing_len = 1; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; break; } hostdata->incoming_ptr = 0; } /* We need to read more MESS_IN bytes for the extended message */ else { hostdata->incoming_ptr++; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; } break; default: printk("Rejecting Unknown Message(%02x) ",msg); write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */ hostdata->outgoing_msg[0] = MESSAGE_REJECT; hostdata->outgoing_len = 1; write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); hostdata->state = S_CONNECTED; } break; /* Note: this interrupt will occur only after a LEVEL2 command */ case CSR_SEL_XFER_DONE: /* Make sure that reselection is enabled at this point - it may * have been turned off for the command that just completed. */ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER); if (phs == 0x60) { DB(DB_INTR,printk("SX-DONE-%ld",cmd->pid)) cmd->SCp.Message = COMMAND_COMPLETE; lun = read_3393(hostdata,WD_TARGET_LUN); DB(DB_INTR,printk(":%d.%d",cmd->SCp.Status,lun)) hostdata->connected = NULL; hostdata->busy[cmd->target] &= ~(1 << cmd->lun); hostdata->state = S_UNCONNECTED; if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) cmd->SCp.Status = lun; if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); else cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); cmd->scsi_done(cmd); /* We are no longer connected to a target - check to see if * there are commands waiting to be executed. */ in2000_execute(instance); } else { printk("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",asr,sr,phs,cmd->pid); } break; /* Note: this interrupt will occur only after a LEVEL2 command */ case CSR_SDP: DB(DB_INTR,printk("SDP")) hostdata->state = S_RUNNING_LEVEL2; write_3393(hostdata,WD_COMMAND_PHASE, 0x41); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); break; case CSR_XFER_DONE|PHS_MESS_OUT: case CSR_UNEXP |PHS_MESS_OUT: case CSR_SRV_REQ |PHS_MESS_OUT: DB(DB_INTR,printk("MSG_OUT=")) /* To get here, we've probably requested MESSAGE_OUT and have * already put the correct bytes in outgoing_msg[] and filled * in outgoing_len. We simply send them out to the SCSI bus. * Sometimes we get MESSAGE_OUT phase when we're not expecting * it - like when our SDTR message is rejected by a target. Some * targets send the REJECT before receiving all of the extended * message, and then seem to go back to MESSAGE_OUT for a byte * or two. Not sure why, or if I'm doing something wrong to * cause this to happen. Regardless, it seems that sending * NOP messages in these situations results in no harm and * makes everyone happy. */ if (hostdata->outgoing_len == 0) { hostdata->outgoing_len = 1; hostdata->outgoing_msg[0] = NOP; } transfer_pio(hostdata->outgoing_msg, hostdata->outgoing_len, DATA_OUT_DIR, hostdata); DB(DB_INTR,printk("%02x",hostdata->outgoing_msg[0])) hostdata->outgoing_len = 0; hostdata->state = S_CONNECTED; break; case CSR_UNEXP_DISC: /* I think I've seen this after a request-sense that was in response * to an error condition, but not sure. We certainly need to do * something when we get this interrupt - the question is 'what?'. * Let's think positively, and assume some command has finished * in a legal manner (like a command that provokes a request-sense), * so we treat it as a normal command-complete-disconnect. */ /* Make sure that reselection is enabled at this point - it may * have been turned off for the command that just completed. */ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER); if (cmd == NULL) { printk(" - Already disconnected! "); hostdata->state = S_UNCONNECTED; /* release the SMP spin_lock and restore irq state */ CLISPIN_UNLOCK(flags); return; } DB(DB_INTR,printk("UNEXP_DISC-%ld",cmd->pid)) hostdata->connected = NULL; hostdata->busy[cmd->target] &= ~(1 << cmd->lun); hostdata->state = S_UNCONNECTED; if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); else cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); cmd->scsi_done(cmd); /* We are no longer connected to a target - check to see if * there are commands waiting to be executed. */ in2000_execute(instance); break; case CSR_DISC: /* Make sure that reselection is enabled at this point - it may * have been turned off for the command that just completed. */ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER); DB(DB_INTR,printk("DISC-%ld",cmd->pid)) if (cmd == NULL) { printk(" - Already disconnected! "); hostdata->state = S_UNCONNECTED; } switch (hostdata->state) { case S_PRE_CMP_DISC: hostdata->connected = NULL; hostdata->busy[cmd->target] &= ~(1 << cmd->lun); hostdata->state = S_UNCONNECTED; DB(DB_INTR,printk(":%d",cmd->SCp.Status)) if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD) cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16); else cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8); cmd->scsi_done(cmd); break; case S_PRE_TMP_DISC: case S_RUNNING_LEVEL2: cmd->host_scribble = (uchar *)hostdata->disconnected_Q; hostdata->disconnected_Q = cmd; hostdata->connected = NULL; hostdata->state = S_UNCONNECTED; #ifdef PROC_STATISTICS hostdata->disc_done_cnt[cmd->target]++; #endif break; default: printk("*** Unexpected DISCONNECT interrupt! ***"); hostdata->state = S_UNCONNECTED; } /* We are no longer connected to a target - check to see if * there are commands waiting to be executed. */ in2000_execute(instance); break; case CSR_RESEL_AM: DB(DB_INTR,printk("RESEL")) /* First we have to make sure this reselection didn't */ /* happen during Arbitration/Selection of some other device. */ /* If yes, put losing command back on top of input_Q. */ if (hostdata->level2 <= L2_NONE) { if (hostdata->selecting) { cmd = (Scsi_Cmnd *)hostdata->selecting; hostdata->selecting = NULL; hostdata->busy[cmd->target] &= ~(1 << cmd->lun); cmd->host_scribble = (uchar *)hostdata->input_Q; hostdata->input_Q = cmd; } } else { if (cmd) { if (phs == 0x00) { hostdata->busy[cmd->target] &= ~(1 << cmd->lun); cmd->host_scribble = (uchar *)hostdata->input_Q; hostdata->input_Q = cmd; } else { printk("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",asr,sr,phs); while (1) printk("\r"); } } } /* OK - find out which device reselected us. */ id = read_3393(hostdata,WD_SOURCE_ID); id &= SRCID_MASK; /* and extract the lun from the ID message. (Note that we don't * bother to check for a valid message here - I guess this is * not the right way to go, but....) */ lun = read_3393(hostdata,WD_DATA); if (hostdata->level2 < L2_RESELECT) write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK); lun &= 7; /* Now we look for the command that's reconnecting. */ cmd = (Scsi_Cmnd *)hostdata->disconnected_Q; patch = NULL; while (cmd) { if (id == cmd->target && lun == cmd->lun) break; patch = cmd; cmd = (Scsi_Cmnd *)cmd->host_scribble; } /* Hmm. Couldn't find a valid command.... What to do? */ if (!cmd) { printk("---TROUBLE: target %d.%d not in disconnect queue---",id,lun); break; } /* Ok, found the command - now start it up again. */ if (patch) patch->host_scribble = cmd->host_scribble; else hostdata->disconnected_Q = (Scsi_Cmnd *)cmd->host_scribble; hostdata->connected = cmd; /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' * because these things are preserved over a disconnect. * But we DO need to fix the DPD bit so it's correct for this command. */ if (is_dir_out(cmd)) write_3393(hostdata,WD_DESTINATION_ID,cmd->target); else write_3393(hostdata,WD_DESTINATION_ID,cmd->target | DSTID_DPD); if (hostdata->level2 >= L2_RESELECT) { write_3393_count(hostdata,0); /* we want a DATA_PHASE interrupt */ write_3393(hostdata,WD_COMMAND_PHASE, 0x45); write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER); hostdata->state = S_RUNNING_LEVEL2; } else hostdata->state = S_CONNECTED; DB(DB_INTR,printk("-%ld",cmd->pid)) break; default: printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--",asr,sr,phs); } write1_io(0, IO_LED_OFF); DB(DB_INTR,printk("} ")) /* release the SMP spin_lock and restore irq state */ CLISPIN_UNLOCK(flags); } #define RESET_CARD 0 #define RESET_CARD_AND_BUS 1 #define B_FLAG 0x80 static int reset_hardware(struct Scsi_Host *instance, int type) { struct IN2000_hostdata *hostdata; int qt,x; unsigned long flags; hostdata = (struct IN2000_hostdata *)instance->hostdata; write1_io(0, IO_LED_ON); if (type == RESET_CARD_AND_BUS) { write1_io(0,IO_CARD_RESET); x = read1_io(IO_HARDWARE); } x = read_3393(hostdata,WD_SCSI_STATUS); /* clear any WD intrpt */ write_3393(hostdata,WD_OWN_ID, instance->this_id | OWNID_EAF | OWNID_RAF | OWNID_FS_8); write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER, calc_sync_xfer(hostdata->default_sx_per/4,DEFAULT_SX_OFF)); save_flags(flags); cli(); write1_io(0,IO_FIFO_WRITE); /* clear fifo counter */ write1_io(0,IO_FIFO_READ); /* start fifo out in read mode */ write_3393(hostdata,WD_COMMAND, WD_CMD_RESET); while (!(READ_AUX_STAT() & ASR_INT)) ; /* wait for RESET to complete */ x = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */ restore_flags(flags); write_3393(hostdata,WD_QUEUE_TAG,0xa5); /* any random number */ qt = read_3393(hostdata,WD_QUEUE_TAG); if (qt == 0xa5) { x |= B_FLAG; write_3393(hostdata,WD_QUEUE_TAG,0); } write_3393(hostdata,WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write1_io(0, IO_LED_OFF); return x; } int in2000_reset(Scsi_Cmnd *cmd, unsigned int reset_flags) { unsigned long flags; struct Scsi_Host *instance; struct IN2000_hostdata *hostdata; int x; instance = cmd->host; hostdata = (struct IN2000_hostdata *)instance->hostdata; printk("scsi%d: Reset. ", instance->host_no); save_flags(flags); cli(); /* do scsi-reset here */ reset_hardware(instance, RESET_CARD_AND_BUS); for (x = 0; x < 8; x++) { hostdata->busy[x] = 0; hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF); hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */ } hostdata->input_Q = NULL; hostdata->selecting = NULL; hostdata->connected = NULL; hostdata->disconnected_Q = NULL; hostdata->state = S_UNCONNECTED; hostdata->fifo = FI_FIFO_UNUSED; hostdata->incoming_ptr = 0; hostdata->outgoing_len = 0; cmd->result = DID_RESET << 16; restore_flags(flags); return 0; } int in2000_abort (Scsi_Cmnd *cmd) { struct Scsi_Host *instance; struct IN2000_hostdata *hostdata; Scsi_Cmnd *tmp, *prev; unsigned long flags; uchar sr, asr; unsigned long timeout; save_flags (flags); cli(); instance = cmd->host; hostdata = (struct IN2000_hostdata *)instance->hostdata; printk ("scsi%d: Abort-", instance->host_no); printk("(asr=%02x,count=%ld,resid=%d,buf_resid=%d,have_data=%d,FC=%02x)- ", READ_AUX_STAT(),read_3393_count(hostdata),cmd->SCp.this_residual,cmd->SCp.buffers_residual, cmd->SCp.have_data_in,read1_io(IO_FIFO_COUNT)); /* * Case 1 : If the command hasn't been issued yet, we simply remove it * from the inout_Q. */ tmp = (Scsi_Cmnd *)hostdata->input_Q; prev = 0; while (tmp) { if (tmp == cmd) { if (prev) prev->host_scribble = cmd->host_scribble; cmd->host_scribble = NULL; cmd->result = DID_ABORT << 16; printk("scsi%d: Abort - removing command %ld from input_Q. ", instance->host_no, cmd->pid); cmd->scsi_done(cmd); restore_flags(flags); return SCSI_ABORT_SUCCESS; } prev = tmp; tmp = (Scsi_Cmnd *)tmp->host_scribble; } /* * Case 2 : If the command is connected, we're going to fail the abort * and let the high level SCSI driver retry at a later time or * issue a reset. * * Timeouts, and therefore aborted commands, will be highly unlikely * and handling them cleanly in this situation would make the common * case of noresets less efficient, and would pollute our code. So, * we fail. */ if (hostdata->connected == cmd) { printk("scsi%d: Aborting connected command %ld - ", instance->host_no, cmd->pid); printk("sending wd33c93 ABORT command - "); write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); write_3393_cmd(hostdata, WD_CMD_ABORT); /* Now we have to attempt to flush out the FIFO... */ printk("flushing fifo - "); timeout = 1000000; do { asr = READ_AUX_STAT(); if (asr & ASR_DBR) read_3393(hostdata, WD_DATA); } while (!(asr & ASR_INT) && timeout-- > 0); sr = read_3393(hostdata, WD_SCSI_STATUS); printk("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", asr, sr, read_3393_count(hostdata), timeout); /* * Abort command processed. * Still connected. * We must disconnect. */ printk("sending wd33c93 DISCONNECT command - "); write_3393_cmd(hostdata, WD_CMD_DISCONNECT); timeout = 1000000; asr = READ_AUX_STAT(); while ((asr & ASR_CIP) && timeout-- > 0) asr = READ_AUX_STAT(); sr = read_3393(hostdata, WD_SCSI_STATUS); printk("asr=%02x, sr=%02x.",asr,sr); hostdata->busy[cmd->target] &= ~(1 << cmd->lun); hostdata->connected = NULL; hostdata->state = S_UNCONNECTED; cmd->result = DID_ABORT << 16; cmd->scsi_done(cmd); in2000_execute (instance); restore_flags(flags); return SCSI_ABORT_SUCCESS; } /* * Case 3: If the command is currently disconnected from the bus, * we're not going to expend much effort here: Let's just return * an ABORT_SNOOZE and hope for the best... */ for (tmp=(Scsi_Cmnd *)hostdata->disconnected_Q; tmp; tmp=(Scsi_Cmnd *)tmp->host_scribble) if (cmd == tmp) { restore_flags(flags); printk("Sending ABORT_SNOOZE. "); return SCSI_ABORT_SNOOZE; } /* * Case 4 : If we reached this point, the command was not found in any of * the queues. * * We probably reached this point because of an unlikely race condition * between the command completing successfully and the abortion code, * so we won't panic, but we will notify the user in case something really * broke. */ in2000_execute (instance); restore_flags(flags); printk("scsi%d: warning : SCSI command probably completed successfully" " before abortion. ", instance->host_no); return SCSI_ABORT_NOT_RUNNING; } #define MAX_IN2000_HOSTS 3 #define MAX_SETUP_ARGS (sizeof(setup_args) / sizeof(char *)) #define SETUP_BUFFER_SIZE 200 static char setup_buffer[SETUP_BUFFER_SIZE]; static char setup_used[MAX_SETUP_ARGS]; static int done_setup = 0; in2000__INITFUNC( void in2000_setup (char *str, int *ints) ) { int i; char *p1,*p2; strncpy(setup_buffer,str,SETUP_BUFFER_SIZE); setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; p1 = setup_buffer; i = 0; while (*p1 && (i < MAX_SETUP_ARGS)) { p2 = strchr(p1, ','); if (p2) { *p2 = '\0'; if (p1 != p2) setup_args[i] = p1; p1 = p2 + 1; i++; } else { setup_args[i] = p1; break; } } for (i=0; i<MAX_SETUP_ARGS; i++) setup_used[i] = 0; done_setup = 1; } /* check_setup_args() returns index if key found, 0 if not */ in2000__INITFUNC( static int check_setup_args(char *key, int *flags, int *val, char *buf) ) { int x; char *cp; for (x=0; x<MAX_SETUP_ARGS; x++) { if (setup_used[x]) continue; if (!strncmp(setup_args[x], key, strlen(key))) break; } if (x == MAX_SETUP_ARGS) return 0; setup_used[x] = 1; cp = setup_args[x] + strlen(key); *val = -1; if (*cp != ':') return ++x; cp++; if ((*cp >= '0') && (*cp <= '9')) { *val = simple_strtoul(cp,NULL,0); } return ++x; } /* The "correct" (ie portable) way to access memory-mapped hardware * such as the IN2000 EPROM and dip switch is through the use of * special macros declared in 'asm/io.h'. We use readb() and readl() * when reading from the card's BIOS area in in2000_detect(). */ static const unsigned int *bios_tab[] in2000__INITDATA = { (unsigned int *)0xc8000, (unsigned int *)0xd0000, (unsigned int *)0xd8000, 0 }; static const unsigned short base_tab[] in2000__INITDATA = { 0x220, 0x200, 0x110, 0x100, }; static const int int_tab[] in2000__INITDATA = { 15, 14, 11, 10 }; in2000__INITFUNC( int in2000_detect(Scsi_Host_Template * tpnt) ) { struct Scsi_Host *instance; struct IN2000_hostdata *hostdata; int detect_count; int bios; int x; unsigned short base; uchar switches; uchar hrev; int flags; int val; char buf[32]; /* Thanks to help from Bill Earnest, probing for IN2000 cards is a * pretty straightforward and fool-proof operation. There are 3 * possible locations for the IN2000 EPROM in memory space - if we * find a BIOS signature, we can read the dip switch settings from * the byte at BIOS+32 (shadowed in by logic on the card). From 2 * of the switch bits we get the card's address in IO space. There's * an image of the dip switch there, also, so we have a way to back- * check that this really is an IN2000 card. Very nifty. Use the * 'ioport:xx' command-line parameter if your BIOS EPROM is absent * or disabled. */ if (!done_setup && setup_strings) in2000_setup(setup_strings,0); detect_count = 0; for (bios = 0; bios_tab[bios]; bios++) { if (check_setup_args("ioport",&flags,&val,buf)) { base = val; switches = ~inb(base + IO_SWITCHES) & 0xff; printk("Forcing IN2000 detection at IOport 0x%x ",base); bios = 2; } /* * There have been a couple of BIOS versions with different layouts * for the obvious ID strings. We look for the 2 most common ones and * hope that they cover all the cases... */ else if (readl(bios_tab[bios]+0x04) == 0x41564f4e || readl(bios_tab[bios]+0x0c) == 0x61776c41) { printk("Found IN2000 BIOS at 0x%x ",(unsigned int)bios_tab[bios]); /* Read the switch image that's mapped into EPROM space */ switches = ~((readb(bios_tab[bios]+0x08) & 0xff)); /* Find out where the IO space is */ x = switches & (SW_ADDR0 | SW_ADDR1); base = base_tab[x]; /* Check for the IN2000 signature in IO space. */ x = ~inb(base + IO_SWITCHES) & 0xff; if (x != switches) { printk("Bad IO signature: %02x vs %02x.\n",x,switches); continue; } } else continue; /* OK. We have a base address for the IO ports - run a few safety checks */ if (!(switches & SW_BIT7)) { /* I _think_ all cards do this */ printk("There is no IN-2000 SCSI card at IOport 0x%03x!\n",base); continue; } /* Let's assume any hardware version will work, although the driver * has only been tested on 0x21, 0x22, 0x25, 0x26, and 0x27. We'll * print out the rev number for reference later, but accept them all. */ hrev = inb(base + IO_HARDWARE); /* Bit 2 tells us if interrupts are disabled */ if (switches & SW_DISINT) { printk("The IN-2000 SCSI card at IOport 0x%03x ",base); printk("is not configured for interrupt operation!\n"); printk("This driver requires an interrupt: cancelling detection.\n"); continue; } /* Ok. We accept that there's an IN2000 at ioaddr 'base'. Now * initialize it. */ tpnt->proc_dir = &proc_scsi_in2000; /* done more than once? harmless. */ detect_count++; instance = scsi_register(tpnt, sizeof(struct IN2000_hostdata)); if (!instance_list) instance_list = instance; hostdata = (struct IN2000_hostdata *)instance->hostdata; instance->io_port = hostdata->io_base = base; hostdata->dip_switch = switches; hostdata->hrev = hrev; write1_io(0,IO_FIFO_WRITE); /* clear fifo counter */ write1_io(0,IO_FIFO_READ); /* start fifo out in read mode */ write1_io(0,IO_INTR_MASK); /* allow all ints */ x = int_tab[(switches & (SW_INT0 | SW_INT1)) >> SW_INT_SHIFT]; if (request_irq(x, in2000_intr, SA_INTERRUPT, "in2000", NULL)) { printk("in2000_detect: Unable to allocate IRQ.\n"); detect_count--; continue; } instance->irq = x; instance->n_io_port = 13; request_region(base, 13, "in2000"); /* lock in this IO space for our use */ for (x = 0; x < 8; x++) { hostdata->busy[x] = 0; hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF); hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */ #ifdef PROC_STATISTICS hostdata->cmd_cnt[x] = 0; hostdata->disc_allowed_cnt[x] = 0; hostdata->disc_done_cnt[x] = 0; #endif } hostdata->input_Q = NULL; hostdata->selecting = NULL; hostdata->connected = NULL; hostdata->disconnected_Q = NULL; hostdata->state = S_UNCONNECTED; hostdata->fifo = FI_FIFO_UNUSED; hostdata->level2 = L2_BASIC; hostdata->disconnect = DIS_ADAPTIVE; hostdata->args = DEBUG_DEFAULTS; hostdata->incoming_ptr = 0; hostdata->outgoing_len = 0; hostdata->default_sx_per = DEFAULT_SX_PER; /* Older BIOS's had a 'sync on/off' switch - use its setting */ if (readl(bios_tab[bios]+0x04) == 0x41564f4e && (switches & SW_SYNC_DOS5)) hostdata->sync_off = 0x00; /* sync defaults to on */ else hostdata->sync_off = 0xff; /* sync defaults to off */ #ifdef PROC_INTERFACE hostdata->proc = PR_VERSION|PR_INFO|PR_STATISTICS| PR_CONNECTED|PR_INPUTQ|PR_DISCQ| PR_STOP; #ifdef PROC_STATISTICS hostdata->int_cnt = 0; #endif #endif if (check_setup_args("nosync",&flags,&val,buf)) hostdata->sync_off = val; if (check_setup_args("period",&flags,&val,buf)) hostdata->default_sx_per = sx_table[round_period((unsigned int)val)].period_ns; if (check_setup_args("disconnect",&flags,&val,buf)) { if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) hostdata->disconnect = val; else hostdata->disconnect = DIS_ADAPTIVE; } if (check_setup_args("noreset",&flags,&val,buf)) hostdata->args ^= A_NO_SCSI_RESET; if (check_setup_args("level2",&flags,&val,buf)) hostdata->level2 = val; if (check_setup_args("debug",&flags,&val,buf)) hostdata->args = (val & DB_MASK); #ifdef PROC_INTERFACE if (check_setup_args("proc",&flags,&val,buf)) hostdata->proc = val; #endif x = reset_hardware(instance,(hostdata->args & A_NO_SCSI_RESET)?RESET_CARD:RESET_CARD_AND_BUS); hostdata->microcode = read_3393(hostdata,WD_CDB_1); if (x & 0x01) { if (x & B_FLAG) hostdata->chip = C_WD33C93B; else hostdata->chip = C_WD33C93A; } else hostdata->chip = C_WD33C93; printk("dip_switch=%02x irq=%d ioport=%02x floppy=%s sync/DOS5=%s ", (switches & 0x7f), instance->irq,hostdata->io_base, (switches & SW_FLOPPY)?"Yes":"No", (switches & SW_SYNC_DOS5)?"Yes":"No"); printk("hardware_ver=%02x chip=%s microcode=%02x\n", hrev, (hostdata->chip==C_WD33C93)?"WD33c93": (hostdata->chip==C_WD33C93A)?"WD33c93A": (hostdata->chip==C_WD33C93B)?"WD33c93B":"unknown", hostdata->microcode); #ifdef DEBUGGING_ON printk("setup_args = "); for (x=0; x<MAX_SETUP_ARGS; x++) printk("%s,",setup_args[x]); printk("\n"); #endif if (hostdata->sync_off == 0xff) printk("Sync-transfer DISABLED on all devices: ENABLE from command-line\n"); printk("IN2000 driver version %s - %s\n",IN2000_VERSION,IN2000_DATE); } return detect_count; } /* NOTE: I lifted this function straight out of the old driver, * and have not tested it. Presumably it does what it's * supposed to do... */ int in2000_biosparam(Disk *disk, kdev_t dev, int *iinfo) { int size; size = disk->capacity; iinfo[0] = 64; iinfo[1] = 32; iinfo[2] = size >> 11; /* This should approximate the large drive handling that the DOS ASPI manager uses. Drives very near the boundaries may not be handled correctly (i.e. near 2.0 Gb and 4.0 Gb) */ if (iinfo[2] > 1024) { iinfo[0] = 64; iinfo[1] = 63; iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]); } if (iinfo[2] > 1024) { iinfo[0] = 128; iinfo[1] = 63; iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]); } if (iinfo[2] > 1024) { iinfo[0] = 255; iinfo[1] = 63; iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]); } return 0; } struct proc_dir_entry proc_scsi_in2000 = { PROC_SCSI_IN2000, 6, "in2000", S_IFDIR | S_IRUGO | S_IXUGO, 2 }; int in2000_proc_info(char *buf, char **start, off_t off, int len, int hn, int in) { #ifdef PROC_INTERFACE char *bp; char tbuf[128]; unsigned long flags; struct Scsi_Host *instance; struct IN2000_hostdata *hd; Scsi_Cmnd *cmd; int x,i; static int stop = 0; for (instance=instance_list; instance; instance=instance->next) { if (instance->host_no == hn) break; } if (!instance) { printk("*** Hmm... Can't find host #%d!\n",hn); return (-ESRCH); } hd = (struct IN2000_hostdata *)instance->hostdata; /* If 'in' is TRUE we need to _read_ the proc file. We accept the following * keywords (same format as command-line, but only ONE per read): * debug * disconnect * period * resync * proc */ if (in) { buf[len] = '\0'; bp = buf; if (!strncmp(bp,"debug:",6)) { bp += 6; hd->args = simple_strtoul(bp,NULL,0) & DB_MASK; } else if (!strncmp(bp,"disconnect:",11)) { bp += 11; x = simple_strtoul(bp,NULL,0); if (x < DIS_NEVER || x > DIS_ALWAYS) x = DIS_ADAPTIVE; hd->disconnect = x; } else if (!strncmp(bp,"period:",7)) { bp += 7; x = simple_strtoul(bp,NULL,0); hd->default_sx_per = sx_table[round_period((unsigned int)x)].period_ns; } else if (!strncmp(bp,"resync:",7)) { bp += 7; x = simple_strtoul(bp,NULL,0); for (i=0; i<7; i++) if (x & (1<<i)) hd->sync_stat[i] = SS_UNSET; } else if (!strncmp(bp,"proc:",5)) { bp += 5; hd->proc = simple_strtoul(bp,NULL,0); } else if (!strncmp(bp,"level2:",7)) { bp += 7; hd->level2 = simple_strtoul(bp,NULL,0); } return len; } save_flags(flags); cli(); bp = buf; *bp = '\0'; if (hd->proc & PR_VERSION) { sprintf(tbuf,"\nVersion %s - %s. Compiled %s %s", IN2000_VERSION,IN2000_DATE,__DATE__,__TIME__); strcat(bp,tbuf); } if (hd->proc & PR_INFO) { sprintf(tbuf,"\ndip_switch=%02x: irq=%d io=%02x floppy=%s sync/DOS5=%s", (hd->dip_switch & 0x7f), instance->irq, hd->io_base, (hd->dip_switch & 0x40)?"Yes":"No", (hd->dip_switch & 0x20)?"Yes":"No"); strcat(bp,tbuf); strcat(bp,"\nsync_xfer[] = "); for (x=0; x<7; x++) { sprintf(tbuf,"\t%02x",hd->sync_xfer[x]); strcat(bp,tbuf); } strcat(bp,"\nsync_stat[] = "); for (x=0; x<7; x++) { sprintf(tbuf,"\t%02x",hd->sync_stat[x]); strcat(bp,tbuf); } } #ifdef PROC_STATISTICS if (hd->proc & PR_STATISTICS) { strcat(bp,"\ncommands issued: "); for (x=0; x<7; x++) { sprintf(tbuf,"\t%ld",hd->cmd_cnt[x]); strcat(bp,tbuf); } strcat(bp,"\ndisconnects allowed:"); for (x=0; x<7; x++) { sprintf(tbuf,"\t%ld",hd->disc_allowed_cnt[x]); strcat(bp,tbuf); } strcat(bp,"\ndisconnects done: "); for (x=0; x<7; x++) { sprintf(tbuf,"\t%ld",hd->disc_done_cnt[x]); strcat(bp,tbuf); } sprintf(tbuf,"\ninterrupts: \t%ld",hd->int_cnt); strcat(bp,tbuf); } #endif if (hd->proc & PR_CONNECTED) { strcat(bp,"\nconnected: "); if (hd->connected) { cmd = (Scsi_Cmnd *)hd->connected; sprintf(tbuf," %ld-%d:%d(%02x)", cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); strcat(bp,tbuf); } } if (hd->proc & PR_INPUTQ) { strcat(bp,"\ninput_Q: "); cmd = (Scsi_Cmnd *)hd->input_Q; while (cmd) { sprintf(tbuf," %ld-%d:%d(%02x)", cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); strcat(bp,tbuf); cmd = (Scsi_Cmnd *)cmd->host_scribble; } } if (hd->proc & PR_DISCQ) { strcat(bp,"\ndisconnected_Q:"); cmd = (Scsi_Cmnd *)hd->disconnected_Q; while (cmd) { sprintf(tbuf," %ld-%d:%d(%02x)", cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]); strcat(bp,tbuf); cmd = (Scsi_Cmnd *)cmd->host_scribble; } } if (hd->proc & PR_TEST) { ; /* insert your own custom function here */ } strcat(bp,"\n"); restore_flags(flags); *start = buf; if (stop) { stop = 0; return 0; /* return 0 to signal end-of-file */ } if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */ stop = 1;; if (hd->proc & PR_STOP) /* stop every other time */ stop = 1; return strlen(bp); #else /* PROC_INTERFACE */ return 0; #endif /* PROC_INTERFACE */ } #ifdef MODULE Scsi_Host_Template driver_template = IN2000; #include "scsi_module.c" #endif
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