fas216.c
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上传日期:2013-02-24
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- /*
- * linux/arch/arm/drivers/scsi/fas216.c
- *
- * Copyright (C) 1997-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and
- * other sources, including:
- * the AMD Am53CF94 data sheet
- * the AMD Am53C94 data sheet
- *
- * This is a generic driver. To use it, have a look at cumana_2.c. You
- * should define your own structure that overlays FAS216_Info, eg:
- * struct my_host_data {
- * FAS216_Info info;
- * ... my host specific data ...
- * };
- *
- * Changelog:
- * 30-08-1997 RMK Created
- * 14-09-1997 RMK Started disconnect support
- * 08-02-1998 RMK Corrected real DMA support
- * 15-02-1998 RMK Started sync xfer support
- * 06-04-1998 RMK Tightened conditions for printing incomplete
- * transfers
- * 02-05-1998 RMK Added extra checks in fas216_reset
- * 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns
- * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
- * 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT
- * 02-04-2000 RMK Converted to use the new error handling, and
- * automatically request sense data upon check
- * condition status from targets.
- *
- * Todo:
- * - allow individual devices to enable sync xfers.
- */
- #include <linux/module.h>
- #include <linux/blk.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/ioport.h>
- #include <linux/sched.h>
- #include <linux/proc_fs.h>
- #include <linux/unistd.h>
- #include <linux/stat.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <asm/dma.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/ecard.h>
- #define FAS216_C
- #include "../../scsi/scsi.h"
- #include "../../scsi/hosts.h"
- #include "fas216.h"
- #define VER_MAJOR 0
- #define VER_MINOR 0
- #define VER_PATCH 5
- /* NOTE: SCSI2 Synchronous transfers *require* DMA according to
- * the data sheet. This restriction is crazy, especially when
- * you only want to send 16 bytes! What were the guys who
- * designed this chip on at that time? Did they read the SCSI2
- * spec at all? The following sections are taken from the SCSI2
- * standard (s2r10) concerning this:
- *
- * > IMPLEMENTORS NOTES:
- * > (1) Re-negotiation at every selection is not recommended, since a
- * > significant performance impact is likely.
- *
- * > The implied synchronous agreement shall remain in effect until a BUS DEVICE
- * > RESET message is received, until a hard reset condition occurs, or until one
- * > of the two SCSI devices elects to modify the agreement. The default data
- * > transfer mode is asynchronous data transfer mode. The default data transfer
- * > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard
- * > reset condition.
- *
- * In total, this means that once you have elected to use synchronous
- * transfers, you must always use DMA.
- *
- * I was thinking that this was a good chip until I found this restriction ;(
- */
- #define SCSI2_SYNC
- #undef SCSI2_WIDE
- #undef SCSI2_TAG
- #undef DEBUG_CONNECT
- #undef DEBUG_BUSSERVICE
- #undef DEBUG_FUNCTIONDONE
- #undef DEBUG_MESSAGES
- #undef CHECK_STRUCTURE
- static struct { int stat, ssr, isr, ph; } list[8];
- static int ptr;
- static void fas216_dumpstate(FAS216_Info *info)
- {
- unsigned char is, stat, inst;
- is = inb(REG_IS(info));
- stat = inb(REG_STAT(info));
- inst = inb(REG_INST(info));
-
- printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X"
- " INST=%02X IS=%02X CFIS=%02X",
- inb(REG_CTCL(info)), inb(REG_CTCM(info)),
- inb(REG_CMD(info)), stat, inst, is,
- inb(REG_CFIS(info)));
- printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02Xn",
- inb(REG_CNTL1(info)), inb(REG_CNTL2(info)),
- inb(REG_CNTL3(info)), inb(REG_CTCH(info)));
- }
- static void fas216_dumpinfo(FAS216_Info *info)
- {
- static int used = 0;
- int i;
- if (used++)
- return;
- printk("FAS216_Info=n");
- printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%pn",
- info->magic_start, info->host, info->SCpnt,
- info->origSCpnt);
- printk(" scsi={ io_port=%X io_shift=%X irq=%X cfg={ %X %X %X %X }n",
- info->scsi.io_port, info->scsi.io_shift, info->scsi.irq,
- info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2],
- info->scsi.cfg[3]);
- printk(" type=%p phase=%X reconnected={ target=%d lun=%d tag=%d }n",
- info->scsi.type, info->scsi.phase,
- info->scsi.reconnected.target,
- info->scsi.reconnected.lun, info->scsi.reconnected.tag);
- printk(" SCp={ ptr=%p this_residual=%X buffer=%p buffers_residual=%X }n",
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual,
- info->scsi.SCp.buffer, info->scsi.SCp.buffers_residual);
- printk(" msgs async_stp=%X disconnectable=%d aborting=%d }n",
- info->scsi.async_stp,
- info->scsi.disconnectable, info->scsi.aborting);
- printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%Xn"
- " disconnects=%X aborts=%X bus_resets=%X host_resets=%X}n",
- info->stats.queues, info->stats.removes, info->stats.fins,
- info->stats.reads, info->stats.writes, info->stats.miscs,
- info->stats.disconnects, info->stats.aborts, info->stats.bus_resets,
- info->stats.host_resets);
- printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }n",
- info->ifcfg.clockrate, info->ifcfg.select_timeout,
- info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth);
- for (i = 0; i < 8; i++) {
- printk(" busyluns[%d]=%X dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }n",
- i, info->busyluns[i], i,
- info->device[i].disconnect_ok, info->device[i].stp,
- info->device[i].sof, info->device[i].sync_state);
- }
- printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }n",
- info->dma.transfer_type, info->dma.setup,
- info->dma.pseudo, info->dma.stop);
- printk(" internal_done=%X magic_end=%lX }n",
- info->internal_done, info->magic_end);
- }
- #ifdef CHECK_STRUCTURE
- static void __fas216_checkmagic(FAS216_Info *info, const char *func)
- {
- int corruption = 0;
- if (info->magic_start != MAGIC) {
- printk(KERN_CRIT "FAS216 Error: magic at start corruptedn");
- corruption++;
- }
- if (info->magic_end != MAGIC) {
- printk(KERN_CRIT "FAS216 Error: magic at end corruptedn");
- corruption++;
- }
- if (corruption) {
- fas216_dumpinfo(info);
- panic("scsi memory space corrupted in %s", func);
- }
- }
- #define fas216_checkmagic(info) __fas216_checkmagic((info), __FUNCTION__)
- #else
- #define fas216_checkmagic(info)
- #endif
- static const char *fas216_bus_phase(int stat)
- {
- static const char *phases[] = {
- "DATA OUT", "DATA IN",
- "COMMAND", "STATUS",
- "MISC OUT", "MISC IN",
- "MESG OUT", "MESG IN"
- };
- return phases[stat & STAT_BUSMASK];
- }
- static const char *fas216_drv_phase(FAS216_Info *info)
- {
- switch (info->scsi.phase) {
- case PHASE_IDLE: return "idle";
- case PHASE_SELECTION: return "selection";
- case PHASE_COMMAND: return "command";
- case PHASE_RECONNECTED: return "reconnected";
- case PHASE_DATAOUT: return "data out";
- case PHASE_DATAIN: return "data in";
- case PHASE_MSGIN: return "message in";
- case PHASE_MSGIN_DISCONNECT: return "disconnect";
- case PHASE_MSGOUT_EXPECT: return "expect message out";
- case PHASE_MSGOUT: return "message out";
- case PHASE_STATUS: return "status";
- case PHASE_DONE: return "done";
- default: return "???";
- }
- }
- static char fas216_target(FAS216_Info *info)
- {
- if (info->SCpnt)
- return '0' + info->SCpnt->target;
- else
- return 'H';
- }
- static void add_debug_list(int stat, int ssr, int isr, int ph)
- {
- list[ptr].stat = stat;
- list[ptr].ssr = ssr;
- list[ptr].isr = isr;
- list[ptr].ph = ph;
- ptr = (ptr + 1) & 7;
- }
- static void print_debug_list(void)
- {
- int i;
- i = ptr;
- printk(KERN_ERR "SCSI IRQ trail: ");
- do {
- printk("%02X:%02X:%02X:%1X ",
- list[i].stat, list[i].ssr,
- list[i].isr, list[i].ph);
- i = (i + 1) & 7;
- } while (i != ptr);
- printk("n");
- }
- static void fas216_done(FAS216_Info *info, unsigned int result);
- /* Function: int fas216_clockrate(unsigned int clock)
- * Purpose : calculate correct value to be written into clock conversion
- * factor register.
- * Params : clock - clock speed in MHz
- * Returns : CLKF_ value
- */
- static int fas216_clockrate(int clock)
- {
- if (clock <= 10 || clock > 40) {
- printk(KERN_CRIT
- "fas216: invalid clock rate: check your driver!n");
- clock = -1;
- } else
- clock = ((clock - 1) / 5 + 1) & 7;
- return clock;
- }
- /* Function: unsigned short fas216_get_last_msg(FAS216_Info *info, int pos)
- * Purpose : retrieve a last message from the list, using position in fifo
- * Params : info - interface to search
- * : pos - current fifo position
- */
- static inline unsigned short
- fas216_get_last_msg(FAS216_Info *info, int pos)
- {
- unsigned short packed_msg = NOP;
- struct message *msg;
- int msgnr = 0;
- while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
- if (pos >= msg->fifo)
- break;
- }
- if (msg) {
- if (msg->msg[0] == EXTENDED_MESSAGE)
- packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8;
- else
- packed_msg = msg->msg[0];
- }
- #ifdef DEBUG_MESSAGES
- printk("Message: %04X found at position %02Xn",
- packed_msg, pos);
- #endif
- return packed_msg;
- }
- /* Function: int fas216_syncperiod(FAS216_Info *info, int ns)
- * Purpose : Calculate value to be loaded into the STP register
- * for a given period in ns
- * Params : info - state structure for interface connected to device
- * : ns - period in ns (between subsequent bytes)
- * Returns : Value suitable for REG_STP
- */
- static int
- fas216_syncperiod(FAS216_Info *info, int ns)
- {
- int value = (info->ifcfg.clockrate * ns) / 1000;
- fas216_checkmagic(info);
- if (value < 4)
- value = 4;
- else if (value > 35)
- value = 35;
- return value & 31;
- }
- /* Function: void fas216_set_sync(FAS216_Info *info, int target)
- * Purpose : Correctly setup FAS216 chip for specified transfer period.
- * Params : info - state structure for interface
- * : target - target
- * Notes : we need to switch the chip out of FASTSCSI mode if we have
- * a transfer period >= 200ns - otherwise the chip will violate
- * the SCSI timings.
- */
- static void
- fas216_set_sync(FAS216_Info *info, int target)
- {
- outb(info->device[target].sof, REG_SOF(info));
- outb(info->device[target].stp, REG_STP(info));
- if (info->device[target].period >= (200 / 4))
- outb(info->scsi.cfg[2] & ~CNTL3_FASTSCSI, REG_CNTL3(info));
- else
- outb(info->scsi.cfg[2], REG_CNTL3(info));
- }
- /* Synchronous transfer support
- *
- * Note: The SCSI II r10 spec says (5.6.12):
- *
- * (2) Due to historical problems with early host adapters that could
- * not accept an SDTR message, some targets may not initiate synchronous
- * negotiation after a power cycle as required by this standard. Host
- * adapters that support synchronous mode may avoid the ensuing failure
- * modes when the target is independently power cycled by initiating a
- * synchronous negotiation on each REQUEST SENSE and INQUIRY command.
- * This approach increases the SCSI bus overhead and is not recommended
- * for new implementations. The correct method is to respond to an
- * SDTR message with a MESSAGE REJECT message if the either the
- * initiator or target devices does not support synchronous transfers
- * or does not want to negotiate for synchronous transfers at the time.
- * Using the correct method assures compatibility with wide data
- * transfers and future enhancements.
- *
- * We will always initiate a synchronous transfer negociation request on
- * every INQUIRY or REQUEST SENSE message, unless the target itself has
- * at some point performed a synchronous transfer negociation request, or
- * we have synchronous transfers disabled for this device.
- */
- /* Function: void fas216_handlesync(FAS216_Info *info, char *msg)
- * Purpose : Handle a synchronous transfer message from the target
- * Params : info - state structure for interface
- * : msg - message from target
- */
- static void
- fas216_handlesync(FAS216_Info *info, char *msg)
- {
- struct fas216_device *dev = &info->device[info->SCpnt->target];
- enum { sync, async, none, reject } res = none;
- #ifdef SCSI2_SYNC
- switch (msg[0]) {
- case MESSAGE_REJECT:
- /* Synchronous transfer request failed.
- * Note: SCSI II r10:
- *
- * SCSI devices that are capable of synchronous
- * data transfers shall not respond to an SDTR
- * message with a MESSAGE REJECT message.
- *
- * Hence, if we get this condition, we disable
- * negociation for this device.
- */
- if (dev->sync_state == neg_inprogress) {
- dev->sync_state = neg_invalid;
- res = async;
- }
- break;
- case EXTENDED_MESSAGE:
- switch (dev->sync_state) {
- /* We don't accept synchronous transfer requests.
- * Respond with a MESSAGE_REJECT to prevent a
- * synchronous transfer agreement from being reached.
- */
- case neg_invalid:
- res = reject;
- break;
- /* We were not negociating a synchronous transfer,
- * but the device sent us a negociation request.
- * Honour the request by sending back a SDTR
- * message containing our capability, limited by
- * the targets capability.
- */
- default:
- outb(CMD_SETATN, REG_CMD(info));
- if (msg[4] > info->ifcfg.sync_max_depth)
- msg[4] = info->ifcfg.sync_max_depth;
- if (msg[3] < 1000 / info->ifcfg.clockrate)
- msg[3] = 1000 / info->ifcfg.clockrate;
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 5,
- EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
- msg[3], msg[4]);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- /* This is wrong. The agreement is not in effect
- * until this message is accepted by the device
- */
- dev->sync_state = neg_targcomplete;
- res = sync;
- break;
- /* We initiated the synchronous transfer negociation,
- * and have successfully received a response from the
- * target. The synchronous transfer agreement has been
- * reached. Note: if the values returned are out of our
- * bounds, we must reject the message.
- */
- case neg_inprogress:
- res = reject;
- if (msg[4] <= info->ifcfg.sync_max_depth &&
- msg[3] >= 1000 / info->ifcfg.clockrate) {
- dev->sync_state = neg_complete;
- res = sync;
- }
- break;
- }
- }
- #else
- res = reject;
- #endif
- switch (res) {
- case sync:
- dev->period = msg[3];
- dev->sof = msg[4];
- dev->stp = fas216_syncperiod(info, msg[3] * 4);
- fas216_set_sync(info, info->SCpnt->target);
- break;
- case reject:
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- case async:
- dev->period = info->ifcfg.asyncperiod / 4;
- dev->sof = 0;
- dev->stp = info->scsi.async_stp;
- fas216_set_sync(info, info->SCpnt->target);
- break;
- case none:
- break;
- }
- }
- /* Function: void fas216_handlewide(FAS216_Info *info, char *msg)
- * Purpose : Handle a wide transfer message from the target
- * Params : info - state structure for interface
- * : msg - message from target
- */
- static void
- fas216_handlewide(FAS216_Info *info, char *msg)
- {
- struct fas216_device *dev = &info->device[info->SCpnt->target];
- enum { wide, bit8, none, reject } res = none;
- #ifdef SCSI2_WIDE
- switch (msg[0]) {
- case MESSAGE_REJECT:
- /* Wide transfer request failed.
- * Note: SCSI II r10:
- *
- * SCSI devices that are capable of wide
- * data transfers shall not respond to a
- * WDTR message with a MESSAGE REJECT message.
- *
- * Hence, if we get this condition, we never
- * reattempt negociation for this device.
- */
- if (dev->wide_state == neg_inprogress) {
- dev->wide_state = neg_invalid;
- res = bit8;
- }
- break;
- case EXTENDED_MESSAGE:
- switch (dev->wide_state) {
- /* We don't accept wide data transfer requests.
- * Respond with a MESSAGE REJECT to prevent a
- * wide data transfer agreement from being reached.
- */
- case neg_invalid:
- res = reject;
- break;
- /* We were not negociating a wide data transfer,
- * but the device sent is a negociation request.
- * Honour the request by sending back a WDTR
- * message containing our capability, limited by
- * the targets capability.
- */
- default:
- outb(CMD_SETATN, REG_CMD(info));
- if (msg[3] > info->ifcfg.wide_max_size)
- msg[3] = info->ifcfg.wide_max_size;
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 4,
- EXTENDED_MESSAGE, 2, EXTENDED_WDTR,
- msg[3]);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- res = wide;
- break;
- /* We initiated the wide data transfer negociation,
- * and have successfully received a response from the
- * target. The synchronous transfer agreement has been
- * reached. Note: if the values returned are out of our
- * bounds, we must reject the message.
- */
- case neg_inprogress:
- res = reject;
- if (msg[3] <= info->ifcfg.wide_max_size) {
- dev->wide_state = neg_complete;
- res = wide;
- }
- break;
- }
- }
- #else
- res = reject;
- #endif
- switch (res) {
- case wide:
- dev->wide_xfer = msg[3];
- break;
- case reject:
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- case bit8:
- dev->wide_xfer = 0;
- break;
- case none:
- break;
- }
- }
- /* Function: void fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
- * Purpose : update data pointers after transfer suspended/paused
- * Params : info - interface's local pointer to update
- * bytes_transferred - number of bytes transferred
- */
- static void
- fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
- {
- unsigned char *ptr;
- unsigned int residual;
- fas216_checkmagic(info);
- ptr = info->scsi.SCp.ptr;
- residual = info->scsi.SCp.this_residual;
- info->SCpnt->request_bufflen -= bytes_transferred;
- while (residual <= bytes_transferred && bytes_transferred) {
- /* We have used up this buffer */
- bytes_transferred -= residual;
- if (info->scsi.SCp.buffers_residual) {
- info->scsi.SCp.buffer++;
- info->scsi.SCp.buffers_residual--;
- ptr = (unsigned char *)info->scsi.SCp.buffer->address;
- residual = info->scsi.SCp.buffer->length;
- } else {
- ptr = NULL;
- residual = 0;
- }
- }
- residual -= bytes_transferred;
- ptr += bytes_transferred;
- if (residual == 0)
- ptr = NULL;
- info->scsi.SCp.ptr = ptr;
- info->scsi.SCp.this_residual = residual;
- }
- /* Function: void fas216_pio(FAS216_Info *info, fasdmadir_t direction)
- * Purpose : transfer data off of/on to card using programmed IO
- * Params : info - interface to transfer data to/from
- * direction - direction to transfer data (DMA_OUT/DMA_IN)
- * Notes : this is incredibly slow
- */
- static void
- fas216_pio(FAS216_Info *info, fasdmadir_t direction)
- {
- unsigned int residual;
- char *ptr;
- fas216_checkmagic(info);
- residual = info->scsi.SCp.this_residual;
- ptr = info->scsi.SCp.ptr;
- if (direction == DMA_OUT)
- outb(*ptr++, REG_FF(info));
- else
- *ptr++ = inb(REG_FF(info));
- residual -= 1;
- if (residual == 0) {
- if (info->scsi.SCp.buffers_residual) {
- info->scsi.SCp.buffer++;
- info->scsi.SCp.buffers_residual--;
- ptr = (unsigned char *)info->scsi.SCp.buffer->address;
- residual = info->scsi.SCp.buffer->length;
- } else {
- ptr = NULL;
- residual = 0;
- }
- }
- info->scsi.SCp.ptr = ptr;
- info->scsi.SCp.this_residual = residual;
- }
- /* Function: void fas216_starttransfer(FAS216_Info *info,
- * fasdmadir_t direction)
- * Purpose : Start a DMA/PIO transfer off of/on to card
- * Params : info - interface from which device disconnected from
- * direction - transfer direction (DMA_OUT/DMA_IN)
- */
- static void
- fas216_starttransfer(FAS216_Info *info, fasdmadir_t direction, int flush_fifo)
- {
- fasdmatype_t dmatype;
- fas216_checkmagic(info);
- info->scsi.phase = (direction == DMA_OUT) ?
- PHASE_DATAOUT : PHASE_DATAIN;
- if (info->dma.transfer_type != fasdma_none &&
- info->dma.transfer_type != fasdma_pio) {
- unsigned long total, residual;
- if (info->dma.transfer_type == fasdma_real_all)
- total = info->SCpnt->request_bufflen;
- else
- total = info->scsi.SCp.this_residual;
- residual = (inb(REG_CFIS(info)) & CFIS_CF) +
- inb(REG_CTCL(info)) +
- (inb(REG_CTCM(info)) << 8) +
- (inb(REG_CTCH(info)) << 16);
- fas216_updateptrs(info, total - residual);
- }
- info->dma.transfer_type = fasdma_none;
- if (!info->scsi.SCp.ptr) {
- printk("scsi%d.%c: null buffer passed to "
- "fas216_starttransfern", info->host->host_no,
- fas216_target(info));
- return;
- }
- /* flush FIFO */
- if (flush_fifo)
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- /*
- * Default to PIO mode or DMA mode if we have a synchronous
- * transfer agreement.
- */
- if (info->device[info->SCpnt->target].sof && info->dma.setup)
- dmatype = fasdma_real_all;
- else
- dmatype = fasdma_pio;
- if (info->dma.setup)
- dmatype = info->dma.setup(info->host, &info->scsi.SCp,
- direction, dmatype);
- info->dma.transfer_type = dmatype;
- switch (dmatype) {
- case fasdma_pio:
- outb(0, REG_SOF(info));
- outb(info->scsi.async_stp, REG_STP(info));
- outb(info->scsi.SCp.this_residual, REG_STCL(info));
- outb(info->scsi.SCp.this_residual >> 8, REG_STCM(info));
- outb(info->scsi.SCp.this_residual >> 16, REG_STCH(info));
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- fas216_pio(info, direction);
- break;
- case fasdma_pseudo:
- outb(info->scsi.SCp.this_residual, REG_STCL(info));
- outb(info->scsi.SCp.this_residual >> 8, REG_STCM(info));
- outb(info->scsi.SCp.this_residual >> 16, REG_STCH(info));
- outb(CMD_TRANSFERINFO | CMD_WITHDMA, REG_CMD(info));
- info->dma.pseudo(info->host, &info->scsi.SCp,
- direction, info->SCpnt->transfersize);
- break;
- case fasdma_real_block:
- outb(info->scsi.SCp.this_residual, REG_STCL(info));
- outb(info->scsi.SCp.this_residual >> 8, REG_STCM(info));
- outb(info->scsi.SCp.this_residual >> 16, REG_STCH(info));
- outb(CMD_TRANSFERINFO | CMD_WITHDMA, REG_CMD(info));
- break;
- case fasdma_real_all:
- outb(info->SCpnt->request_bufflen, REG_STCL(info));
- outb(info->SCpnt->request_bufflen >> 8, REG_STCM(info));
- outb(info->SCpnt->request_bufflen >> 16, REG_STCH(info));
- outb(CMD_TRANSFERINFO | CMD_WITHDMA, REG_CMD(info));
- break;
- default:
- printk(KERN_ERR "scsi%d.%d: invalid FAS216 DMA typen",
- info->host->host_no, fas216_target(info));
- break;
- }
- }
- /* Function: void fas216_stoptransfer(FAS216_Info *info)
- * Purpose : Stop a DMA transfer onto / off of the card
- * Params : info - interface from which device disconnected from
- */
- static void
- fas216_stoptransfer(FAS216_Info *info)
- {
- fas216_checkmagic(info);
- if (info->dma.transfer_type != fasdma_none &&
- info->dma.transfer_type != fasdma_pio) {
- unsigned long total, residual;
- if ((info->dma.transfer_type == fasdma_real_all ||
- info->dma.transfer_type == fasdma_real_block) &&
- info->dma.stop)
- info->dma.stop(info->host, &info->scsi.SCp);
- if (info->dma.transfer_type == fasdma_real_all)
- total = info->SCpnt->request_bufflen;
- else
- total = info->scsi.SCp.this_residual;
- residual = (inb(REG_CFIS(info)) & CFIS_CF) +
- inb(REG_CTCL(info)) +
- (inb(REG_CTCM(info)) << 8) +
- (inb(REG_CTCH(info)) << 16);
- fas216_updateptrs(info, total - residual);
- info->dma.transfer_type = fasdma_none;
- }
- if (info->scsi.phase == PHASE_DATAOUT)
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- }
- /* Function: void fas216_disconnected_intr(FAS216_Info *info)
- * Purpose : handle device disconnection
- * Params : info - interface from which device disconnected from
- */
- static void
- fas216_disconnect_intr(FAS216_Info *info)
- {
- fas216_checkmagic(info);
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: disconnect phase=%02Xn", info->host->host_no,
- fas216_target(info), info->scsi.phase);
- #endif
- msgqueue_flush(&info->scsi.msgs);
- switch (info->scsi.phase) {
- case PHASE_SELECTION: /* while selecting - no target */
- case PHASE_SELSTEPS:
- fas216_done(info, DID_NO_CONNECT);
- break;
- case PHASE_MSGIN_DISCONNECT: /* message in - disconnecting */
- outb(CMD_ENABLESEL, REG_CMD(info));
- info->scsi.disconnectable = 1;
- info->scsi.reconnected.tag = 0;
- info->scsi.phase = PHASE_IDLE;
- info->stats.disconnects += 1;
- break;
- case PHASE_DONE: /* at end of command - complete */
- fas216_done(info, DID_OK);
- break;
- case PHASE_MSGOUT: /* message out - possible ABORT message */
- if (fas216_get_last_msg(info, info->scsi.msgin_fifo) == ABORT) {
- info->scsi.aborting = 0;
- fas216_done(info, DID_ABORT);
- break;
- }
- default: /* huh? */
- printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %sn",
- info->host->host_no, fas216_target(info), fas216_drv_phase(info));
- print_debug_list();
- fas216_stoptransfer(info);
- fas216_done(info, DID_ERROR);
- break;
- }
- }
- /* Function: void fas216_reselected_intr(FAS216_Info *info)
- * Purpose : Start reconnection of a device
- * Params : info - interface which was reselected
- */
- static void
- fas216_reselected_intr(FAS216_Info *info)
- {
- unsigned char target, identify_msg, ok;
- fas216_checkmagic(info);
- if ((info->scsi.phase == PHASE_SELECTION ||
- info->scsi.phase == PHASE_SELSTEPS) && info->SCpnt) {
- Scsi_Cmnd *SCpnt = info->SCpnt;
- info->origSCpnt = SCpnt;
- info->SCpnt = NULL;
- if (info->device[SCpnt->target].wide_state == neg_inprogress)
- info->device[SCpnt->target].wide_state = neg_wait;
- if (info->device[SCpnt->target].sync_state == neg_inprogress)
- info->device[SCpnt->target].sync_state = neg_wait;
- }
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: reconnect phase=%02Xn", info->host->host_no,
- fas216_target(info), info->scsi.phase);
- #endif
- if ((inb(REG_CFIS(info)) & CFIS_CF) != 2) {
- printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselectn",
- info->host->host_no);
- outb(CMD_SETATN, REG_CMD(info));
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- return;
- }
- target = inb(REG_FF(info));
- identify_msg = inb(REG_FF(info));
- ok = 1;
- if (!(target & (1 << info->host->this_id))) {
- printk(KERN_ERR "scsi%d.H: invalid host id on reselectn", info->host->host_no);
- ok = 0;
- }
- if (!(identify_msg & 0x80)) {
- printk(KERN_ERR "scsi%d.H: no IDENTIFY message on reselect, got msg %02Xn",
- info->host->host_no, identify_msg);
- ok = 0;
- }
- if (!ok) {
- /*
- * Something went wrong - send an initiator error to
- * the target.
- */
- outb(CMD_SETATN, REG_CMD(info));
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- return;
- }
- target &= ~(1 << info->host->this_id);
- switch (target) {
- case 1: target = 0; break;
- case 2: target = 1; break;
- case 4: target = 2; break;
- case 8: target = 3; break;
- case 16: target = 4; break;
- case 32: target = 5; break;
- case 64: target = 6; break;
- case 128: target = 7; break;
- default: target = info->host->this_id; break;
- }
- identify_msg &= 7;
- info->scsi.reconnected.target = target;
- info->scsi.reconnected.lun = identify_msg;
- info->scsi.reconnected.tag = 0;
- ok = 0;
- if (info->scsi.disconnectable && info->SCpnt &&
- info->SCpnt->target == target && info->SCpnt->lun == identify_msg)
- ok = 1;
- if (!ok && queue_probetgtlun(&info->queues.disconnected, target, identify_msg))
- ok = 1;
- msgqueue_flush(&info->scsi.msgs);
- if (ok) {
- info->scsi.phase = PHASE_RECONNECTED;
- outb(target, REG_SDID(info));
- } else {
- /*
- * Our command structure not found - abort the
- * command on the target. Since we have no
- * record of this command, we can't send
- * an INITIATOR DETECTED ERROR message.
- */
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_addmsg(&info->scsi.msgs, 1, ABORT);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- }
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- }
- /* Function: void fas216_finish_reconnect(FAS216_Info *info)
- * Purpose : finish reconnection sequence for device
- * Params : info - interface which caused function done interrupt
- */
- static void
- fas216_finish_reconnect(FAS216_Info *info)
- {
- fas216_checkmagic(info);
- #ifdef DEBUG_CONNECT
- printk("Connected: %1X %1X %02X, reconnected: %1X %1X %02Xn",
- info->SCpnt->target, info->SCpnt->lun, info->SCpnt->tag,
- info->scsi.reconnected.target, info->scsi.reconnected.lun,
- info->scsi.reconnected.tag);
- #endif
- if (info->scsi.disconnectable && info->SCpnt) {
- info->scsi.disconnectable = 0;
- if (info->SCpnt->target == info->scsi.reconnected.target &&
- info->SCpnt->lun == info->scsi.reconnected.lun &&
- info->SCpnt->tag == info->scsi.reconnected.tag) {
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: reconnected",
- info->host->host_no, fas216_target(info));
- #endif
- } else {
- queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: had to move command to disconnected queuen",
- info->host->host_no, fas216_target(info));
- #endif
- info->SCpnt = NULL;
- }
- }
- if (!info->SCpnt) {
- info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected,
- info->scsi.reconnected.target,
- info->scsi.reconnected.lun,
- info->scsi.reconnected.tag);
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: had to get command",
- info->host->host_no, fas216_target(info));
- #endif
- }
- if (!info->SCpnt) {
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- #if 0
- if (info->scsi.reconnected.tag)
- msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, info->scsi.reconnected.tag);
- else
- #endif
- msgqueue_addmsg(&info->scsi.msgs, 1, ABORT);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- info->scsi.aborting = 1;
- } else {
- /*
- * Restore data pointer from SAVED data pointer
- */
- info->scsi.SCp = info->SCpnt->SCp;
- #ifdef DEBUG_CONNECT
- printk(", data pointers: [%p, %X]",
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
- #endif
- }
- #ifdef DEBUG_CONNECT
- printk("n");
- #endif
- }
- static int fas216_wait_cmd(FAS216_Info *info, int cmd)
- {
- int tout;
- int stat;
- outb(cmd, REG_CMD(info));
- for (tout = 1000; tout; tout -= 1) {
- stat = inb(REG_STAT(info));
- if (stat & STAT_INT)
- break;
- udelay(1);
- }
- return stat;
- }
- static int fas216_get_msg_byte(FAS216_Info *info)
- {
- int stat;
- stat = fas216_wait_cmd(info, CMD_MSGACCEPTED);
- if ((stat & STAT_INT) == 0)
- goto timedout;
- if ((stat & STAT_BUSMASK) != STAT_MESGIN)
- goto unexpected_phase_change;
- inb(REG_INST(info));
- stat = fas216_wait_cmd(info, CMD_TRANSFERINFO);
- if ((stat & STAT_INT) == 0)
- goto timedout;
- if ((stat & STAT_BUSMASK) != STAT_MESGIN)
- goto unexpected_phase_change;
- inb(REG_INST(info));
- return inb(REG_FF(info));
- timedout:
- printk("scsi%d.%c: timed out waiting for message byten",
- info->host->host_no, fas216_target(info));
- return -1;
- unexpected_phase_change:
- printk("scsi%d.%c: unexpected phase change: status = %02Xn",
- info->host->host_no, fas216_target(info), stat);
- return -2;
- }
- /* Function: void fas216_message(FAS216_Info *info)
- * Purpose : handle a function done interrupt from FAS216 chip
- * Params : info - interface which caused function done interrupt
- */
- static void fas216_message(FAS216_Info *info)
- {
- unsigned char *message = info->scsi.message;
- unsigned int msglen = 1, i;
- int msgbyte = 0;
- fas216_checkmagic(info);
- message[0] = inb(REG_FF(info));
- if (message[0] == EXTENDED_MESSAGE) {
- msgbyte = fas216_get_msg_byte(info);
- if (msgbyte >= 0) {
- message[1] = msgbyte;
- for (msglen = 2; msglen < message[1] + 2; msglen++) {
- msgbyte = fas216_get_msg_byte(info);
- if (msgbyte >= 0)
- message[msglen] = msgbyte;
- else
- break;
- }
- }
- }
- info->scsi.msglen = msglen;
- #ifdef DEBUG_MESSAGES
- {
- int i;
- printk("scsi%d.%c: message in: ",
- info->host->host_no, fas216_target(info));
- for (i = 0; i < msglen; i++)
- printk("%02X ", message[i]);
- printk("n");
- }
- #endif
- if (info->scsi.phase == PHASE_RECONNECTED) {
- if (message[0] == SIMPLE_QUEUE_TAG)
- info->scsi.reconnected.tag = message[1];
- fas216_finish_reconnect(info);
- info->scsi.phase = PHASE_MSGIN;
- }
- switch (message[0]) {
- case COMMAND_COMPLETE:
- if (msglen != 1)
- goto unrecognised;
- printk(KERN_ERR "scsi%d.%c: command complete with no "
- "status in MESSAGE_IN?n",
- info->host->host_no, fas216_target(info));
- break;
- case SAVE_POINTERS:
- if (msglen != 1)
- goto unrecognised;
- /*
- * Save current data pointer to SAVED data pointer
- * SCSI II standard says that we must not acknowledge
- * this until we have really saved pointers.
- * NOTE: we DO NOT save the command nor status pointers
- * as required by the SCSI II standard. These always
- * point to the start of their respective areas.
- */
- info->SCpnt->SCp = info->scsi.SCp;
- info->SCpnt->SCp.sent_command = 0;
- #if defined (DEBUG_MESSAGES) || defined (DEBUG_CONNECT)
- printk("scsi%d.%c: save data pointers: [%p, %X]n",
- info->host->host_no, fas216_target(info),
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
- #endif
- break;
- case RESTORE_POINTERS:
- if (msglen != 1)
- goto unrecognised;
- /*
- * Restore current data pointer from SAVED data pointer
- */
- info->scsi.SCp = info->SCpnt->SCp;
- #if defined (DEBUG_MESSAGES) || defined (DEBUG_CONNECT)
- printk("scsi%d.%c: restore data pointers: [%p, %X]n",
- info->host->host_no, fas216_target(info),
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
- #endif
- break;
- case DISCONNECT:
- if (msglen != 1)
- goto unrecognised;
- info->scsi.phase = PHASE_MSGIN_DISCONNECT;
- break;
- case MESSAGE_REJECT:
- if (msglen != 1)
- goto unrecognised;
- switch (fas216_get_last_msg(info, info->scsi.msgin_fifo)) {
- case EXTENDED_MESSAGE | EXTENDED_SDTR << 8:
- fas216_handlesync(info, message);
- break;
- case EXTENDED_MESSAGE | EXTENDED_WDTR << 8:
- fas216_handlewide(info, message);
- break;
- default:
- printk("scsi%d.%c: reject, last message %04Xn",
- info->host->host_no, fas216_target(info),
- fas216_get_last_msg(info, info->scsi.msgin_fifo));
- }
- break;
- case NOP:
- break;
- case SIMPLE_QUEUE_TAG:
- if (msglen < 2)
- goto unrecognised;
- /* handled above - print a warning since this is untested */
- printk("scsi%d.%c: reconnect queue tag %02Xn",
- info->host->host_no, fas216_target(info),
- message[1]);
- break;
- case EXTENDED_MESSAGE:
- if (msglen < 3)
- goto unrecognised;
- switch (message[2]) {
- case EXTENDED_SDTR: /* Sync transfer negociation request/reply */
- fas216_handlesync(info, message);
- break;
- case EXTENDED_WDTR: /* Wide transfer negociation request/reply */
- fas216_handlewide(info, message);
- break;
- default:
- goto unrecognised;
- }
- break;
- default:
- goto unrecognised;
- }
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- return;
- unrecognised:
- printk("scsi%d.%c: unrecognised message, rejectingn",
- info->host->host_no, fas216_target(info));
- printk("scsi%d.%c: message was", info->host->host_no, fas216_target(info));
- for (i = 0; i < msglen; i++)
- printk("%s%02X", i & 31 ? " " : "n ", message[i]);
- printk("n");
- /*
- * Something strange seems to be happening here -
- * I can't use SETATN since the chip gives me an
- * invalid command interrupt when I do. Weird.
- */
- outb(CMD_NOP, REG_CMD(info));
- fas216_dumpstate(info);
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- fas216_dumpstate(info);
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- }
- /* Function: void fas216_send_command(FAS216_Info *info)
- * Purpose : send a command to a target after all message bytes have been sent
- * Params : info - interface which caused bus service
- */
- static void fas216_send_command(FAS216_Info *info)
- {
- int i;
- fas216_checkmagic(info);
- outb(CMD_NOP|CMD_WITHDMA, REG_CMD(info));
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- /* load command */
- for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++)
- outb(info->SCpnt->cmnd[i], REG_FF(info));
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- info->scsi.phase = PHASE_COMMAND;
- }
- /* Function: void fas216_send_messageout(FAS216_Info *info, int start)
- * Purpose : handle bus service to send a message
- * Params : info - interface which caused bus service
- * Note : We do not allow the device to change the data direction!
- */
- static void fas216_send_messageout(FAS216_Info *info, int start)
- {
- unsigned int tot_msglen = msgqueue_msglength(&info->scsi.msgs);
- fas216_checkmagic(info);
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- if (tot_msglen) {
- struct message *msg;
- int msgnr = 0;
- while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
- int i;
- for (i = start; i < msg->length; i++)
- outb(msg->msg[i], REG_FF(info));
- msg->fifo = tot_msglen - (inb(REG_CFIS(info)) & CFIS_CF);
- start = 0;
- }
- } else
- outb(NOP, REG_FF(info));
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- info->scsi.phase = PHASE_MSGOUT;
- }
- /* Function: void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int ssr)
- * Purpose : handle a bus service interrupt from FAS216 chip
- * Params : info - interface which caused bus service interrupt
- * stat - Status register contents
- * ssr - SCSI Status register contents
- */
- static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int ssr)
- {
- fas216_checkmagic(info);
- #ifdef DEBUG_BUSSERVICE
- printk("scsi%d.%c: bus service: stat=%02X ssr=%02X phase=%02Xn",
- info->host->host_no, fas216_target(info), stat, ssr, info->scsi.phase);
- #endif
- switch (info->scsi.phase) {
- case PHASE_SELECTION:
- if ((ssr & IS_BITS) != 1)
- goto bad_is;
- break;
- case PHASE_SELSTEPS:
- switch (ssr & IS_BITS) {
- case IS_SELARB:
- case IS_MSGBYTESENT:
- goto bad_is;
- case IS_NOTCOMMAND:
- case IS_EARLYPHASE:
- if ((stat & STAT_BUSMASK) == STAT_MESGIN)
- break;
- goto bad_is;
- case IS_COMPLETE:
- break;
- }
- default:
- break;
- }
- outb(CMD_NOP, REG_CMD(info));
- #define STATE(st,ph) ((ph) << 3 | (st))
- /* This table describes the legal SCSI state transitions,
- * as described by the SCSI II spec.
- */
- switch (STATE(stat & STAT_BUSMASK, info->scsi.phase)) {
- /* Reselmsgin -> Data In */
- case STATE(STAT_DATAIN, PHASE_RECONNECTED):
- fas216_finish_reconnect(info);
- case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> Data In */
- case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */
- case STATE(STAT_DATAIN, PHASE_MSGOUT): /* Message Out -> Data In */
- case STATE(STAT_DATAIN, PHASE_COMMAND): /* Command -> Data In */
- case STATE(STAT_DATAIN, PHASE_MSGIN): /* Message In -> Data In */
- fas216_starttransfer(info, DMA_IN, 0);
- return;
- case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */
- fas216_starttransfer(info, DMA_OUT, 0);
- return;
- /* Reselmsgin -> Data Out */
- case STATE(STAT_DATAOUT, PHASE_RECONNECTED):
- fas216_finish_reconnect(info);
- case STATE(STAT_DATAOUT, PHASE_SELSTEPS):/* Sel w/ steps-> Data Out */
- case STATE(STAT_DATAOUT, PHASE_MSGOUT): /* Message Out -> Data Out */
- case STATE(STAT_DATAOUT, PHASE_COMMAND):/* Command -> Data Out */
- case STATE(STAT_DATAOUT, PHASE_MSGIN): /* Message In -> Data Out */
- fas216_starttransfer(info, DMA_OUT, 1);
- return;
- /* Reselmsgin -> Status */
- case STATE(STAT_STATUS, PHASE_RECONNECTED):
- fas216_finish_reconnect(info);
- goto status;
- case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out -> Status */
- case STATE(STAT_STATUS, PHASE_DATAIN): /* Data In -> Status */
- fas216_stoptransfer(info);
- case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status */
- case STATE(STAT_STATUS, PHASE_MSGOUT): /* Message Out -> Status */
- case STATE(STAT_STATUS, PHASE_COMMAND): /* Command -> Status */
- case STATE(STAT_STATUS, PHASE_MSGIN): /* Message In -> Status */
- status:
- outb(CMD_INITCMDCOMPLETE, REG_CMD(info));
- info->scsi.phase = PHASE_STATUS;
- return;
- case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out -> Message In */
- case STATE(STAT_MESGIN, PHASE_DATAIN): /* Data In -> Message In */
- fas216_stoptransfer(info);
- case STATE(STAT_MESGIN, PHASE_COMMAND): /* Command -> Message In */
- case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In */
- case STATE(STAT_MESGIN, PHASE_MSGOUT): /* Message Out -> Message In */
- info->scsi.msgin_fifo = inb(REG_CFIS(info)) & CFIS_CF;
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- info->scsi.phase = PHASE_MSGIN;
- return;
- /* Reselmsgin -> Message In */
- case STATE(STAT_MESGIN, PHASE_RECONNECTED):
- case STATE(STAT_MESGIN, PHASE_MSGIN):
- info->scsi.msgin_fifo = inb(REG_CFIS(info)) & CFIS_CF;
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- return;
- /* Reselmsgin -> Command */
- case STATE(STAT_COMMAND, PHASE_RECONNECTED):
- fas216_finish_reconnect(info);
- case STATE(STAT_COMMAND, PHASE_MSGOUT): /* Message Out -> Command */
- case STATE(STAT_COMMAND, PHASE_MSGIN): /* Message In -> Command */
- fas216_send_command(info);
- info->scsi.phase = PHASE_COMMAND;
- return;
- /* Selection -> Message Out */
- case STATE(STAT_MESGOUT, PHASE_SELECTION):
- fas216_send_messageout(info, 1);
- return;
- /* Any -> Message Out */
- case STATE(STAT_MESGOUT, PHASE_MSGOUT_EXPECT):
- fas216_send_messageout(info, 0);
- return;
- /* Error recovery rules.
- * These either attempt to abort or retry the operation.
- * TODO: we need more of these
- */
- case STATE(STAT_COMMAND, PHASE_COMMAND):/* Command -> Command */
- /* error - we've sent out all the command bytes
- * we have.
- * NOTE: we need SAVE DATA POINTERS/RESTORE DATA POINTERS
- * to include the command bytes sent for this to work
- * correctly.
- */
- printk(KERN_ERR "scsi%d.%c: "
- "target trying to receive more command bytesn",
- info->host->host_no, fas216_target(info));
- outb(CMD_SETATN, REG_CMD(info));
- outb(15, REG_STCL(info));
- outb(0, REG_STCM(info));
- outb(0, REG_STCH(info));
- outb(CMD_PADBYTES | CMD_WITHDMA, REG_CMD(info));
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- return;
- /* Selection -> Message Out */
- case STATE(STAT_MESGOUT, PHASE_SELSTEPS):
- case STATE(STAT_MESGOUT, PHASE_MSGOUT): /* Message Out -> Message Out */
- /* If we get another message out phase, this
- * usually means some parity error occurred.
- * Resend complete set of messages. If we have
- * more than 1 byte to send, we need to assert
- * ATN again.
- */
- if (msgqueue_msglength(&info->scsi.msgs) > 1)
- outb(CMD_SETATN, REG_CMD(info));
- fas216_send_messageout(info, 0);
- return;
- }
- if (info->scsi.phase == PHASE_MSGIN_DISCONNECT) {
- printk(KERN_ERR "scsi%d.%c: disconnect message received, but bus service %s?n",
- info->host->host_no, fas216_target(info),
- fas216_bus_phase(stat));
- msgqueue_flush(&info->scsi.msgs);
- outb(CMD_SETATN, REG_CMD(info));
- msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
- info->scsi.phase = PHASE_MSGOUT_EXPECT;
- info->scsi.aborting = 1;
- outb(CMD_TRANSFERINFO, REG_CMD(info));
- return;
- }
- printk(KERN_ERR "scsi%d.%c: bus phase %s after %s?n",
- info->host->host_no, fas216_target(info),
- fas216_bus_phase(stat),
- fas216_drv_phase(info));
- print_debug_list();
- return;
- bad_is:
- printk("scsi%d.%c: bus service at step %d?n",
- info->host->host_no, fas216_target(info),
- ssr & IS_BITS);
- print_debug_list();
- fas216_done(info, DID_ERROR);
- }
- /* Function: void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int ssr)
- * Purpose : handle a function done interrupt from FAS216 chip
- * Params : info - interface which caused function done interrupt
- * stat - Status register contents
- * ssr - SCSI Status register contents
- */
- static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int ssr)
- {
- int status, message;
- fas216_checkmagic(info);
- #ifdef DEBUG_FUNCTIONDONE
- printk("scsi%d.%c: function done: stat=%X ssr=%X phase=%02Xn",
- info->host->host_no, fas216_target(info), stat, ssr, info->scsi.phase);
- #endif
- switch (info->scsi.phase) {
- case PHASE_STATUS: /* status phase - read status and msg */
- status = inb(REG_FF(info));
- message = inb(REG_FF(info));
- info->scsi.SCp.Message = message;
- info->scsi.SCp.Status = status;
- info->scsi.phase = PHASE_DONE;
- outb(CMD_MSGACCEPTED, REG_CMD(info));
- break;
- case PHASE_IDLE: /* reselected? */
- case PHASE_MSGIN: /* message in phase */
- case PHASE_RECONNECTED: /* reconnected command */
- if ((stat & STAT_BUSMASK) == STAT_MESGIN) {
- info->scsi.msgin_fifo = inb(REG_CFIS(info)) & CFIS_CF;
- fas216_message(info);
- break;
- }
- default:
- printk("scsi%d.%c: internal phase %s for function done?"
- " What do I do with this?n",
- info->host->host_no, fas216_target(info),
- fas216_drv_phase(info));
- }
- }
- /* Function: void fas216_intr(struct Scsi_Host *instance)
- * Purpose : handle interrupts from the interface to progress a command
- * Params : instance - interface to service
- */
- void fas216_intr(struct Scsi_Host *instance)
- {
- FAS216_Info *info = (FAS216_Info *)instance->hostdata;
- unsigned char isr, ssr, stat;
- fas216_checkmagic(info);
- stat = inb(REG_STAT(info));
- ssr = inb(REG_IS(info));
- isr = inb(REG_INST(info));
- add_debug_list(stat, ssr, isr, info->scsi.phase);
- if (stat & STAT_INT) {
- if (isr & INST_BUSRESET) {
- printk(KERN_DEBUG "scsi%d.H: bus reset detectedn", instance->host_no);
- scsi_report_bus_reset(instance, 0);
- } else if (isr & INST_ILLEGALCMD) {
- printk(KERN_CRIT "scsi%d.H: illegal command givenn", instance->host_no);
- fas216_dumpstate(info);
- } else if (isr & INST_DISCONNECT)
- fas216_disconnect_intr(info);
- else if (isr & INST_RESELECTED) /* reselected */
- fas216_reselected_intr(info);
- else if (isr & INST_BUSSERVICE) /* bus service request */
- fas216_busservice_intr(info, stat, ssr);
- else if (isr & INST_FUNCDONE) /* function done */
- fas216_funcdone_intr(info, stat, ssr);
- else
- printk("scsi%d.%c: unknown interrupt received:"
- " phase %s isr %02X ssr %02X stat %02Xn",
- instance->host_no, fas216_target(info),
- fas216_drv_phase(info), isr, ssr, stat);
- }
- }
- /* Function: void fas216_kick(FAS216_Info *info)
- * Purpose : kick a command to the interface - interface should be idle
- * Params : info - our host interface to kick
- * Notes : Interrupts are always disabled!
- */
- static void fas216_kick(FAS216_Info *info)
- {
- Scsi_Cmnd *SCpnt = NULL;
- int tot_msglen, from_queue = 0, disconnect_ok;
- fas216_checkmagic(info);
- /*
- * Obtain the next command to process.
- */
- do {
- if (info->reqSCpnt) {
- SCpnt = info->reqSCpnt;
- info->reqSCpnt = NULL;
- break;
- }
- if (info->origSCpnt) {
- SCpnt = info->origSCpnt;
- info->origSCpnt = NULL;
- break;
- }
- /* retrieve next command */
- if (!SCpnt) {
- SCpnt = queue_remove_exclude(&info->queues.issue,
- info->busyluns);
- from_queue = 1;
- break;
- }
- } while (0);
- if (!SCpnt) /* no command pending - just exit */
- return;
- if (info->scsi.disconnectable && info->SCpnt) {
- queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
- info->scsi.disconnectable = 0;
- info->SCpnt = NULL;
- printk("scsi%d.%c: moved command to disconnected queuen",
- info->host->host_no, fas216_target(info));
- }
- /*
- * claim host busy
- */
- info->scsi.phase = PHASE_SELECTION;
- info->SCpnt = SCpnt;
- info->scsi.SCp = SCpnt->SCp;
- info->dma.transfer_type = fasdma_none;
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: starting cmd %02X",
- info->host->host_no, '0' + SCpnt->target,
- SCpnt->cmnd[0]);
- #endif
- if (from_queue) {
- #ifdef SCSI2_TAG
- /*
- * tagged queuing - allocate a new tag to this command
- */
- if (SCpnt->device->tagged_queue && SCpnt->cmnd[0] != REQUEST_SENSE &&
- SCpnt->cmnd[0] != INQUIRY) {
- SCpnt->device->current_tag += 1;
- if (SCpnt->device->current_tag == 0)
- SCpnt->device->current_tag = 1;
- SCpnt->tag = SCpnt->device->current_tag;
- } else
- #endif
- set_bit(SCpnt->target * 8 + SCpnt->lun, info->busyluns);
- info->stats.removes += 1;
- switch (SCpnt->cmnd[0]) {
- case WRITE_6:
- case WRITE_10:
- case WRITE_12:
- info->stats.writes += 1;
- break;
- case READ_6:
- case READ_10:
- case READ_12:
- info->stats.reads += 1;
- break;
- default:
- info->stats.miscs += 1;
- break;
- }
- }
- /*
- * Don't allow request sense commands to disconnect.
- */
- disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE &&
- info->device[SCpnt->target].disconnect_ok;
- /*
- * build outgoing message bytes
- */
- msgqueue_flush(&info->scsi.msgs);
- msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->lun));
- /*
- * add tag message if required
- */
- if (SCpnt->tag)
- msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag);
- do {
- #ifdef SCSI2_WIDE
- if (info->device[SCpnt->target].wide_state == neg_wait) {
- info->device[SCpnt->target].wide_state = neg_inprogress;
- msgqueue_addmsg(&info->scsi.msgs, 4,
- EXTENDED_MESSAGE, 2, EXTENDED_WDTR,
- info->ifcfg.wide_max_size);
- break;
- }
- #endif
- #ifdef SCSI2_SYNC
- if ((info->device[SCpnt->target].sync_state == neg_wait ||
- info->device[SCpnt->target].sync_state == neg_complete) &&
- (SCpnt->cmnd[0] == REQUEST_SENSE ||
- SCpnt->cmnd[0] == INQUIRY)) {
- info->device[SCpnt->target].sync_state = neg_inprogress;
- msgqueue_addmsg(&info->scsi.msgs, 5,
- EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
- 1000 / info->ifcfg.clockrate,
- info->ifcfg.sync_max_depth);
- break;
- }
- #endif
- } while (0);
- /* following what the ESP driver says */
- outb(0, REG_STCL(info));
- outb(0, REG_STCM(info));
- outb(0, REG_STCH(info));
- outb(CMD_NOP | CMD_WITHDMA, REG_CMD(info));
- /* flush FIFO */
- outb(CMD_FLUSHFIFO, REG_CMD(info));
- /* load bus-id and timeout */
- outb(BUSID(SCpnt->target), REG_SDID(info));
- outb(info->ifcfg.select_timeout, REG_STIM(info));
- /* synchronous transfers */
- fas216_set_sync(info, SCpnt->target);
- tot_msglen = msgqueue_msglength(&info->scsi.msgs);
- #ifdef DEBUG_MESSAGES
- {
- struct message *msg;
- int msgnr = 0, i;
- printk("scsi%d.%c: message out: ",
- info->host->host_no, '0' + SCpnt->target);
- while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
- printk("{ ");
- for (i = 0; i < msg->length; i++)
- printk("%02x ", msg->msg[i]);
- printk("} ");
- }
- printk("n");
- }
- #endif
- if (tot_msglen == 1 || tot_msglen == 3) {
- /*
- * We have an easy message length to send...
- */
- struct message *msg;
- int msgnr = 0, i;
- info->scsi.phase = PHASE_SELSTEPS;
- /* load message bytes */
- while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
- for (i = 0; i < msg->length; i++)
- outb(msg->msg[i], REG_FF(info));
- msg->fifo = tot_msglen - (inb(REG_CFIS(info)) & CFIS_CF);
- }
- /* load command */
- for (i = 0; i < SCpnt->cmd_len; i++)
- outb(SCpnt->cmnd[i], REG_FF(info));
- if (tot_msglen == 1)
- outb(CMD_SELECTATN, REG_CMD(info));
- else
- outb(CMD_SELECTATN3, REG_CMD(info));
- } else {
- /*
- * We have an unusual number of message bytes to send.
- * Load first byte into fifo, and issue SELECT with ATN and
- * stop steps.
- */
- struct message *msg = msgqueue_getmsg(&info->scsi.msgs, 0);
- outb(msg->msg[0], REG_FF(info));
- msg->fifo = 1;
- outb(CMD_SELECTATNSTOP, REG_CMD(info));
- }
- #ifdef DEBUG_CONNECT
- printk(", data pointers [%p, %X]n",
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
- #endif
- /* should now get either DISCONNECT or (FUNCTION DONE with BUS SERVICE) intr */
- }
- /* Function: void fas216_rq_sns_done(info, SCpnt, result)
- * Purpose : Finish processing automatic request sense command
- * Params : info - interface that completed
- * SCpnt - command that completed
- * result - driver byte of result
- */
- static void
- fas216_rq_sns_done(FAS216_Info *info, Scsi_Cmnd *SCpnt, unsigned int result)
- {
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: request sense complete, result=%04X%02X%02Xn",
- info->host->host_no, '0' + SCpnt->target, result,
- SCpnt->SCp.Message, SCpnt->SCp.Status);
- #endif
- if (result != DID_OK || SCpnt->SCp.Status != GOOD)
- /*
- * Something went wrong. Make sure that we don't
- * have valid data in the sense buffer that could
- * confuse the higher levels.
- */
- memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
- /*
- * Note that we don't set SCpnt->result, since that should
- * reflect the status of the command that we were asked by
- * the upper layers to process. This would have been set
- * correctly by fas216_std_done.
- */
- SCpnt->scsi_done(SCpnt);
- }
- /* Function: void fas216_std_done(info, SCpnt, result)
- * Purpose : Finish processing of standard command
- * Params : info - interface that completed
- * SCpnt - command that completed
- * result - driver byte of result
- */
- static void
- fas216_std_done(FAS216_Info *info, Scsi_Cmnd *SCpnt, unsigned int result)
- {
- info->stats.fins += 1;
- SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 |
- info->scsi.SCp.Status;
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: command complete, result=%08X, command=",
- info->host->host_no, '0' + SCpnt->target, SCpnt->result);
- print_command(SCpnt->cmnd);
- #endif
- /*
- * If the driver detected an error, or the command
- * was request sense, then we're all done.
- */
- if (result != DID_OK || SCpnt->cmnd[0] == REQUEST_SENSE)
- goto done;
- /*
- * If the command returned CHECK_CONDITION status,
- * request the sense information.
- */
- if (info->scsi.SCp.Status == CHECK_CONDITION)
- goto request_sense;
- /*
- * If the command did not complete with GOOD status,
- * we are all done here.
- */
- if (info->scsi.SCp.Status != GOOD)
- goto done;
- /*
- * We have successfully completed a command. Make sure that
- * we do not have any buffers left to transfer. The world
- * is not perfect, and we seem to occasionally hit this.
- * It can be indicative of a buggy driver, target or the upper
- * levels of the SCSI code.
- */
- if (info->scsi.SCp.ptr) {
- switch (SCpnt->cmnd[0]) {
- case INQUIRY:
- case START_STOP:
- // case READ_CAPACITY:
- case MODE_SENSE:
- break;
- default:
- printk(KERN_ERR "scsi%d.%c: incomplete data transfer "
- "detected: res=%08X ptr=%p len=%X command=",
- info->host->host_no, '0' + SCpnt->target,
- SCpnt->result, info->scsi.SCp.ptr,
- info->scsi.SCp.this_residual);
- print_command(SCpnt->cmnd);
- }
- }
- done: SCpnt->scsi_done(SCpnt);
- return;
- request_sense:
- memset(SCpnt->cmnd, 0, sizeof (SCpnt->cmnd));
- SCpnt->cmnd[0] = REQUEST_SENSE;
- SCpnt->cmnd[1] = SCpnt->lun << 5;
- SCpnt->cmnd[4] = sizeof(SCpnt->sense_buffer);
- SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
- SCpnt->SCp.buffer = NULL;
- SCpnt->SCp.buffers_residual = 0;
- SCpnt->SCp.ptr = (char *)SCpnt->sense_buffer;
- SCpnt->SCp.this_residual = sizeof(SCpnt->sense_buffer);
- SCpnt->SCp.Message = 0;
- SCpnt->SCp.Status = 0;
- SCpnt->sc_data_direction = SCSI_DATA_READ;
- SCpnt->use_sg = 0;
- SCpnt->tag = 0;
- SCpnt->host_scribble = (void *)fas216_rq_sns_done;
- /*
- * Place this command into the high priority "request
- * sense" slot. This will be the very next command
- * executed, unless a target connects to us.
- */
- if (info->reqSCpnt)
- printk(KERN_WARNING "scsi%d.%c: loosing request commandn",
- info->host->host_no, '0' + SCpnt->target);
- info->reqSCpnt = SCpnt;
- }
- /* Function: void fas216_done(FAS216_Info *info, unsigned int result)
- * Purpose : complete processing for current command
- * Params : info - interface that completed
- * result - driver byte of result
- */
- static void fas216_done(FAS216_Info *info, unsigned int result)
- {
- void (*fn)(FAS216_Info *, Scsi_Cmnd *, unsigned int);
- Scsi_Cmnd *SCpnt;
- fas216_checkmagic(info);
- if (!info->SCpnt)
- goto no_command;
- SCpnt = info->SCpnt;
- info->SCpnt = NULL;
- info->scsi.phase = PHASE_IDLE;
- if (!SCpnt->scsi_done)
- goto no_done;
- if (info->scsi.aborting) {
- printk("scsi%d.%c: uncaught abort - returning DID_ABORTn",
- info->host->host_no, fas216_target(info));
- result = DID_ABORT;
- info->scsi.aborting = 0;
- }
- /*
- * Sanity check the completion - if we have zero bytes left
- * to transfer, we should not have a valid pointer.
- */
- if (info->scsi.SCp.ptr && info->scsi.SCp.this_residual == 0) {
- printk("scsi%d.%c: zero bytes left to transfer, but "
- "buffer pointer still valid: ptr=%p len=%08x command=",
- info->host->host_no, '0' + SCpnt->target,
- info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
- info->scsi.SCp.ptr = NULL;
- print_command(SCpnt->cmnd);
- }
- /*
- * Clear down this command as completed. If we need to request
- * the sense information, fas216_kick will re-assert the busy
- * status.
- */
- clear_bit(SCpnt->target * 8 + SCpnt->lun, info->busyluns);
- fn = (void (*)(FAS216_Info *, Scsi_Cmnd *, unsigned int))SCpnt->host_scribble;
- fn(info, SCpnt, result);
- if (info->scsi.irq != NO_IRQ)
- fas216_kick(info);
- return;
- no_command:
- panic("scsi%d.H: null command in fas216_done",
- info->host->host_no);
- no_done:
- panic("scsi%d.H: null scsi_done function in fas216_done",
- info->host->host_no);
- }
- /* Function: int fas216_queue_command(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- * Purpose : queue a command for adapter to process.
- * Params : SCpnt - Command to queue
- * done - done function to call once command is complete
- * Returns : 0 - success, else error
- * Notes : io_request_lock is held, interrupts are disabled.
- */
- int fas216_queue_command(Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- int result;
- fas216_checkmagic(info);
- #ifdef DEBUG_CONNECT
- printk("scsi%d.%c: received queuable command (%p) %02Xn",
- SCpnt->host->host_no, '0' + SCpnt->target,
- SCpnt, SCpnt->cmnd[0]);
- #endif
- SCpnt->scsi_done = done;
- SCpnt->host_scribble = (void *)fas216_std_done;
- SCpnt->result = 0;
- SCpnt->SCp.Message = 0;
- SCpnt->SCp.Status = 0;
- if (SCpnt->use_sg) {
- unsigned long len = 0;
- int buf;
- SCpnt->SCp.buffer = (struct scatterlist *) SCpnt->buffer;
- SCpnt->SCp.buffers_residual = SCpnt->use_sg - 1;
- SCpnt->SCp.ptr = (char *) SCpnt->SCp.buffer->address;
- SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
- /*
- * Calculate correct buffer length. Some commands
- * come in with the wrong request_bufflen.
- */
- for (buf = 0; buf <= SCpnt->SCp.buffers_residual; buf++)
- len += SCpnt->SCp.buffer[buf].length;
- if (SCpnt->request_bufflen != len)
- printk(KERN_WARNING "scsi%d.%c: bad request buffer "
- "length %d, should be %ldn", info->host->host_no,
- '0' + SCpnt->target, SCpnt->request_bufflen, len);
- SCpnt->request_bufflen = len;
- } else {
- SCpnt->SCp.buffer = NULL;
- SCpnt->SCp.buffers_residual = 0;
- SCpnt->SCp.ptr = (unsigned char *)SCpnt->request_buffer;
- SCpnt->SCp.this_residual = SCpnt->request_bufflen;
- }
- /*
- * If the upper SCSI layers pass a buffer, but zero length,
- * we aren't interested in the buffer pointer.
- */
- if (SCpnt->SCp.this_residual == 0 && SCpnt->SCp.ptr) {
- #if 0
- printk(KERN_WARNING "scsi%d.%c: zero length buffer passed for "
- "command ", info->host->host_no, '0' + SCpnt->target);
- print_command(SCpnt->cmnd);
- #endif
- SCpnt->SCp.ptr = NULL;
- }
- info->stats.queues += 1;
- SCpnt->tag = 0;
- /*
- * Add command into execute queue and let it complete under
- * whatever scheme we're using.
- */
- result = !queue_add_cmd_ordered(&info->queues.issue, SCpnt);
- /*
- * If we successfully added the command,
- * kick the interface to get it moving.
- */
- if (result == 0 && (!info->SCpnt || info->scsi.disconnectable))
- fas216_kick(info);
- return result;
- }
- /* Function: void fas216_internal_done(Scsi_Cmnd *SCpnt)
- * Purpose : trigger restart of a waiting thread in fas216_command
- * Params : SCpnt - Command to wake
- */
- static void fas216_internal_done(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- fas216_checkmagic(info);
- info->internal_done = 1;
- }
- /* Function: int fas216_command(Scsi_Cmnd *SCpnt)
- * Purpose : queue a command for adapter to process.
- * Params : SCpnt - Command to queue
- * Returns : scsi result code
- * Notes : io_request_lock is held, interrupts are disabled.
- */
- int fas216_command(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- fas216_checkmagic(info);
- /*
- * We should only be using this if we don't have an interrupt.
- * Provide some "incentive" to use the queueing code.
- */
- if (info->scsi.irq != NO_IRQ)
- BUG();
- info->internal_done = 0;
- fas216_queue_command(SCpnt, fas216_internal_done);
- /*
- * This wastes time, since we can't return until the command is
- * complete. We can't sleep either since we may get re-entered!
- * However, we must re-enable interrupts, or else we'll be
- * waiting forever.
- */
- spin_unlock_irq(&io_request_lock);
- while (!info->internal_done) {
- /*
- * If we don't have an IRQ, then we must poll the card for
- * it's interrupt, and use that to call this driver's
- * interrupt routine. That way, we keep the command
- * progressing. Maybe we can add some inteligence here
- * and go to sleep if we know that the device is going
- * to be some time (eg, disconnected).
- */
- if (inb(REG_STAT(info)) & STAT_INT) {
- spin_lock_irq(&io_request_lock);
- fas216_intr(info->host);
- spin_unlock_irq(&io_request_lock);
- }
- }
- spin_lock_irq(&io_request_lock);
- return SCpnt->result;
- }
- enum res_abort {
- res_failed, /* unable to abort */
- res_success, /* command on issue queue */
- res_success_clear, /* command marked tgt/lun busy */
- res_hw_abort /* command on disconnected dev */
- };
- /*
- * Prototype: enum res_abort fas216_do_abort(FAS216_Info *info, Scsi_Cmnd *SCpnt)
- * Purpose : decide how to abort a command
- * Params : SCpnt - command to abort
- * Returns : abort status
- */
- static enum res_abort
- fas216_do_abort(FAS216_Info *info, Scsi_Cmnd *SCpnt)
- {
- enum res_abort res = res_failed;
- if (queue_remove_cmd(&info->queues.issue, SCpnt)) {
- /*
- * The command was on the issue queue, and has not been
- * issued yet. We can remove the command from the queue,
- * and acknowledge the abort. Neither the device nor the
- * interface know about the command.
- */
- printk("on issue queue ");
- res = res_success;
- } else if (queue_remove_cmd(&info->queues.disconnected, SCpnt)) {
- /*
- * The command was on the disconnected queue. We must
- * reconnect with the device if possible, and send it
- * an abort message.
- */
- printk("on disconnected queue ");
- res = res_hw_abort;
- } else if (info->SCpnt == SCpnt) {
- printk("executing ");
- switch (info->scsi.phase) {
- /*
- * If the interface is idle, and the command is 'disconnectable',
- * then it is the same as on the disconnected queue.
- */
- case PHASE_IDLE:
- if (info->scsi.disconnectable) {
- info->scsi.disconnectable = 0;
- info->SCpnt = NULL;
- res = res_hw_abort;
- }
- break;
- default:
- break;
- }
- } else if (info->origSCpnt == SCpnt) {
- /*
- * The command will be executed next, but a command
- * is currently using the interface. This is similar to
- * being on the issue queue, except the busylun bit has
- * been set.
- */
- info->origSCpnt = NULL;
- printk("waiting for execution ");
- res = res_success_clear;
- } else
- printk("unknown ");
- return res;
- }
- /* Function: int fas216_eh_abort(Scsi_Cmnd *SCpnt)
- * Purpose : abort this command
- * Params : SCpnt - command to abort
- * Returns : FAILED if unable to abort
- * Notes : io_request_lock is taken, and irqs are disabled
- */
- int fas216_eh_abort(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- int result = FAILED;
- fas216_checkmagic(info);
- info->stats.aborts += 1;
- print_debug_list();
- fas216_dumpstate(info);
- fas216_dumpinfo(info);
- printk(KERN_WARNING "scsi%d: abort ", info->host->host_no);
- switch (fas216_do_abort(info, SCpnt)) {
- /*
- * We managed to find the command and cleared it out.
- * We do not expect the command to be executing on the
- * target, but we have set the busylun bit.
- */
- case res_success_clear:
- printk("clear ");
- clear_bit(SCpnt->target * 8 + SCpnt->lun, info->busyluns);
- /*
- * We found the command, and cleared it out. Either
- * the command is still known to be executing on the
- * target, or the busylun bit is not set.
- */
- case res_success:
- printk("successn");
- result = SUCCESS;
- break;
- /*
- * We need to reconnect to the target and send it an
- * ABORT or ABORT_TAG message. We can only do this
- * if the bus is free.
- */
- case res_hw_abort:
-
- /*
- * We are unable to abort the command for some reason.
- */
- default:
- case res_failed:
- printk("failedn");
- break;
- }
- return result;
- }
- /* Function: void fas216_reset_state(FAS216_Info *info)
- * Purpose : Initialise driver internal state
- * Params : info - state to initialise
- */
- static void fas216_reset_state(FAS216_Info *info)
- {
- neg_t sync_state, wide_state;
- int i;
- fas216_checkmagic(info);
- /*
- * Clear out all stale info in our state structure
- */
- memset(info->busyluns, 0, sizeof(info->busyluns));
- msgqueue_flush(&info->scsi.msgs);
- info->scsi.reconnected.target = 0;
- info->scsi.reconnected.lun = 0;
- info->scsi.reconnected.tag = 0;
- info->scsi.disconnectable = 0;
- info->scsi.aborting = 0;
- info->scsi.phase = PHASE_IDLE;
- info->scsi.async_stp =
- fas216_syncperiod(info, info->ifcfg.asyncperiod);
- if (info->ifcfg.wide_max_size == 0)
- wide_state = neg_invalid;
- else
- #ifdef SCSI2_WIDE
- wide_state = neg_wait;
- #else
- wide_state = neg_invalid;
- #endif
- if (info->host->dma_channel == NO_DMA || !info->dma.setup)
- sync_state = neg_invalid;
- else
- #ifdef SCSI2_SYNC
- sync_state = neg_wait;
- #else
- sync_state = neg_invalid;
- #endif
- for (i = 0; i < 8; i++) {
- info->device[i].disconnect_ok = info->ifcfg.disconnect_ok;
- info->device[i].sync_state = sync_state;
- info->device[i].wide_state = wide_state;
- info->device[i].period = info->ifcfg.asyncperiod / 4;
- info->device[i].stp = info->scsi.async_stp;
- info->device[i].sof = 0;
- info->device[i].wide_xfer = 0;
- }
- /*
- * Drain all commands on disconnected queue
- */
- while (queue_remove(&info->queues.disconnected) != NULL);
- /*
- * Remove executing commands.
- */
- info->SCpnt = NULL;
- info->reqSCpnt = NULL;
- info->origSCpnt = NULL;
- }
- /* Function: int fas216_eh_device_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the device associated with this command
- * Params : SCpnt - command specifing device to reset
- * Returns : FAILED if unable to reset
- */
- int fas216_eh_device_reset(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- printk("scsi%d.%c: "__FUNCTION__": calledn",
- info->host->host_no, '0' + SCpnt->target);
- return FAILED;
- }
- /* Function: int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the bus associated with the command
- * Params : SCpnt - command specifing bus to reset
- * Returns : FAILED if unable to reset
- * Notes : io_request_lock is taken, and irqs are disabled
- */
- int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- int result = FAILED;
- fas216_checkmagic(info);
- info->stats.bus_resets += 1;
- printk("scsi%d.%c: "__FUNCTION__": resetting busn",
- info->host->host_no, '0' + SCpnt->target);
- /*
- * Attempt to stop all activity on this interface.
- */
- outb(info->scsi.cfg[2], REG_CNTL3(info));
- fas216_stoptransfer(info);
- /*
- * Clear any pending interrupts
- */
- while (inb(REG_STAT(info)) & STAT_INT)
- inb(REG_INST(info));
- /*
- * Reset the SCSI bus
- */
- outb(CMD_RESETSCSI, REG_CMD(info));
- udelay(5);
- /*
- * Clear reset interrupt
- */
- if (inb(REG_STAT(info)) & STAT_INT &&
- inb(REG_INST(info)) & INST_BUSRESET)
- result = SUCCESS;
- fas216_reset_state(info);
- return result;
- }
- /* Function: void fas216_init_chip(FAS216_Info *info)
- * Purpose : Initialise FAS216 state after reset
- * Params : info - state structure for interface
- */
- static void fas216_init_chip(FAS216_Info *info)
- {
- outb(fas216_clockrate(info->ifcfg.clockrate), REG_CLKF(info));
- outb(info->scsi.cfg[0], REG_CNTL1(info));
- outb(info->scsi.cfg[1], REG_CNTL2(info));
- outb(info->scsi.cfg[2], REG_CNTL3(info));
- outb(info->ifcfg.select_timeout, REG_STIM(info));
- outb(0, REG_SOF(info));
- outb(info->scsi.async_stp, REG_STP(info));
- outb(info->scsi.cfg[0], REG_CNTL1(info));
- }
- /* Function: int fas216_eh_host_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the host associated with this command
- * Params : SCpnt - command specifing host to reset
- * Returns : FAILED if unable to reset
- * Notes : io_request_lock is taken, and irqs are disabled
- */
- int fas216_eh_host_reset(Scsi_Cmnd *SCpnt)
- {
- FAS216_Info *info = (FAS216_Info *)SCpnt->host->hostdata;
- fas216_checkmagic(info);
- printk("scsi%d.%c: "__FUNCTION__": resetting hostn",
- info->host->host_no, '0' + SCpnt->target);
- /*
- * Reset the SCSI chip.
- */
- outb(CMD_RESETCHIP, REG_CMD(info));
- /*
- * Ugly ugly ugly!
- * We need to release the io_request_lock and enable
- * IRQs if we sleep, but we must relock and disable
- * IRQs after the sleep.
- */
- spin_unlock_irq(&io_request_lock);
- scsi_sleep(25*HZ/100);
- spin_lock_irq(&io_request_lock);
- /*
- * Release the SCSI reset.
- */
- outb(CMD_NOP, REG_CMD(info));
- fas216_init_chip(info);
- return SUCCESS;
- }
- #define TYPE_UNKNOWN 0
- #define TYPE_NCR53C90 1
- #define TYPE_NCR53C90A 2
- #define TYPE_NCR53C9x 3
- #define TYPE_Am53CF94 4
- #define TYPE_EmFAS216 5
- #define TYPE_QLFAS216 6
- static char *chip_types[] = {
- "unknown",
- "NS NCR53C90",
- "NS NCR53C90A",
- "NS NCR53C9x",
- "AMD Am53CF94",
- "Emulex FAS216",
- "QLogic FAS216"
- };
- static int fas216_detect_type(FAS216_Info *info)
- {
- int family, rev;
- /*
- * Reset the chip.
- */
- outb(CMD_RESETCHIP, REG_CMD(info));
- udelay(50);
- outb(CMD_NOP, REG_CMD(info));
- /*
- * Check to see if control reg 2 is present.
- */
- outb(0, REG_CNTL3(info));
- outb(CNTL2_S2FE, REG_CNTL2(info));
- /*
- * If we are unable to read back control reg 2
- * correctly, it is not present, and we have a
- * NCR53C90.
- */
- if ((inb(REG_CNTL2(info)) & (~0xe0)) != CNTL2_S2FE)
- return TYPE_NCR53C90;
- /*
- * Now, check control register 3
- */
- outb(0, REG_CNTL2(info));
- outb(0, REG_CNTL3(info));
- outb(5, REG_CNTL3(info));
- /*
- * If we are unable to read the register back
- * correctly, we have a NCR53C90A
- */
- if (inb(REG_CNTL3(info)) != 5)
- return TYPE_NCR53C90A;
- /*
- * Now read the ID from the chip.
- */
- outb(0, REG_CNTL3(info));
- outb(CNTL3_ADIDCHK, REG_CNTL3(info));
- outb(0, REG_CNTL3(info));
- outb(CMD_RESETCHIP, REG_CMD(info));
- udelay(5);
- outb(CMD_WITHDMA | CMD_NOP, REG_CMD(info));
- outb(CNTL2_ENF, REG_CNTL2(info));
- outb(CMD_RESETCHIP, REG_CMD(info));
- udelay(5);
- outb(CMD_NOP, REG_CMD(info));
- rev = inb(REG1_ID(info));
- family = rev >> 3;
- rev &= 7;
- switch (family) {
- case 0x01:
- if (rev == 4)
- return TYPE_Am53CF94;
- break;
- case 0x02:
- switch (rev) {
- case 2:
- return TYPE_EmFAS216;
- case 3:
- return TYPE_QLFAS216;
- }
- break;
- default:
- break;
- }
- printk("family %x rev %xn", family, rev);
- return TYPE_NCR53C9x;
- }
- /* Function: int fas216_init(struct Scsi_Host *instance)
- * Purpose : initialise FAS/NCR/AMD SCSI ic.
- * Params : instance - a driver-specific filled-out structure
- * Returns : 0 on success
- */
- int fas216_init(struct Scsi_Host *instance)
- {
- FAS216_Info *info = (FAS216_Info *)instance->hostdata;
- int type;
- info->magic_start = MAGIC;
- info->magic_end = MAGIC;
- info->host = instance;
- info->scsi.cfg[0] = instance->this_id;
- info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE;
- info->scsi.cfg[2] = info->ifcfg.cntl3 | CNTL3_ADIDCHK | CNTL3_G2CB;
- memset(&info->stats, 0, sizeof(info->stats));
- msgqueue_initialise(&info->scsi.msgs);
- if (!queue_initialise(&info->queues.issue))
- return 1;
- if (!queue_initialise(&info->queues.disconnected)) {
- queue_free(&info->queues.issue);
- return 1;
- }
- fas216_reset_state(info);
- type = fas216_detect_type(info);
- info->scsi.type = chip_types[type];
- udelay(300);
- /*
- * Initialise the chip correctly.
- */
- fas216_init_chip(info);
- /*
- * Reset the SCSI bus. We don't want to see
- * the resulting reset interrupt, so mask it
- * out.
- */
- outb(info->scsi.cfg[0] | CNTL1_DISR, REG_CNTL1(info));
- outb(CMD_RESETSCSI, REG_CMD(info));
- /*
- * scsi standard says wait 250ms
- */
- spin_unlock_irq(&io_request_lock);
- scsi_sleep(25*HZ/100);
- spin_lock_irq(&io_request_lock);
- outb(info->scsi.cfg[0], REG_CNTL1(info));
- inb(REG_INST(info));
- fas216_checkmagic(info);
- return 0;
- }
- /* Function: int fas216_release(struct Scsi_Host *instance)
- * Purpose : release all resources and put everything to bed for
- * FAS/NCR/AMD SCSI ic.
- * Params : instance - a driver-specific filled-out structure
- * Returns : 0 on success
- */
- int fas216_release(struct Scsi_Host *instance)
- {
- FAS216_Info *info = (FAS216_Info *)instance->hostdata;
- fas216_checkmagic(info);
- outb(CMD_RESETCHIP, REG_CMD(info));
- queue_free(&info->queues.disconnected);
- queue_free(&info->queues.issue);
- return 0;
- }
- /*
- * Function: int fas216_info(FAS216_Info *info, char *buffer)
- * Purpose : generate a string containing information about this
- * host.
- * Params : info - FAS216 host information
- * buffer - string buffer to build string
- * Returns : size of built string
- */
- int fas216_info(FAS216_Info *info, char *buffer)
- {
- char *p = buffer;
- p += sprintf(p, "(%s) at port 0x%08lX ",
- info->scsi.type, info->host->io_port);
- if (info->host->irq != NO_IRQ)
- p += sprintf(p, "irq %d ", info->host->irq);
- else
- p += sprintf(p, "no irq ");
- if (info->host->dma_channel != NO_DMA)
- p += sprintf(p, "dma %d ", info->host->dma_channel);
- else
- p += sprintf(p, "no dma ");
- return p - buffer;
- }
- int fas216_print_host(FAS216_Info *info, char *buffer)
- {
-
- return sprintf(buffer,
- "n"
- "Chip : %sn"
- " Address: 0x%08lXn"
- " IRQ : %dn"
- " DMA : %dn",
- info->scsi.type, info->host->io_port,
- info->host->irq, info->host->dma_channel);
- }
- int fas216_print_stats(FAS216_Info *info, char *buffer)
- {
- return sprintf(buffer,
- "n"
- "Command Statistics:n"
- " Queued : %un"
- " Issued : %un"
- " Completed : %un"
- " Reads : %un"
- " Writes : %un"
- " Others : %un"
- " Disconnects: %un"
- " Aborts : %un"
- " Bus resets : %un"
- " Host resets: %un",
- info->stats.queues, info->stats.removes,
- info->stats.fins, info->stats.reads,
- info->stats.writes, info->stats.miscs,
- info->stats.disconnects, info->stats.aborts,
- info->stats.bus_resets, info->stats.host_resets);
- }
- int fas216_print_device(FAS216_Info *info, Scsi_Device *scd, char *buffer)
- {
- struct fas216_device *dev = &info->device[scd->id];
- int len = 0;
- char *p;
- proc_print_scsidevice(scd, buffer, &len, 0);
- p = buffer + len;
- p += sprintf(p, " Extensions: ");
- if (scd->tagged_supported)
- p += sprintf(p, "TAG %sabled [%d] ",
- scd->tagged_queue ? "en" : "dis",
- scd->current_tag);
- p += sprintf(p, "n Transfers : %d-bit ",
- 8 << dev->wide_xfer);
- if (dev->sof)
- p += sprintf(p, "sync offset %d, %d nsn",
- dev->sof, dev->period * 4);
- else
- p += sprintf(p, "asyncn");
- return p - buffer;
- }
- EXPORT_SYMBOL(fas216_info);
- EXPORT_SYMBOL(fas216_init);
- EXPORT_SYMBOL(fas216_queue_command);
- EXPORT_SYMBOL(fas216_command);
- EXPORT_SYMBOL(fas216_intr);
- EXPORT_SYMBOL(fas216_release);
- EXPORT_SYMBOL(fas216_eh_abort);
- EXPORT_SYMBOL(fas216_eh_device_reset);
- EXPORT_SYMBOL(fas216_eh_bus_reset);
- EXPORT_SYMBOL(fas216_eh_host_reset);
- EXPORT_SYMBOL(fas216_print_host);
- EXPORT_SYMBOL(fas216_print_stats);
- EXPORT_SYMBOL(fas216_print_device);
- MODULE_AUTHOR("Russell King");
- MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core");
- MODULE_LICENSE("GPL");