![Harvey Harrison](/assets/img/avatar_default.png)
[jejb: fixed up a ton of missed conversions. All of you are on notice this has happened, driver trees will now need to be rebased] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: SCSI List <linux-scsi@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
3042 lines
77 KiB
C
3042 lines
77 KiB
C
/*
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* linux/drivers/acorn/scsi/fas216.c
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*
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* Copyright (C) 1997-2003 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and
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* other sources, including:
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* the AMD Am53CF94 data sheet
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* the AMD Am53C94 data sheet
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*
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* This is a generic driver. To use it, have a look at cumana_2.c. You
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* should define your own structure that overlays FAS216_Info, eg:
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* struct my_host_data {
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* FAS216_Info info;
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* ... my host specific data ...
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* };
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*
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* Changelog:
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* 30-08-1997 RMK Created
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* 14-09-1997 RMK Started disconnect support
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* 08-02-1998 RMK Corrected real DMA support
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* 15-02-1998 RMK Started sync xfer support
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* 06-04-1998 RMK Tightened conditions for printing incomplete
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* transfers
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* 02-05-1998 RMK Added extra checks in fas216_reset
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* 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns
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* 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
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* 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT
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* 02-04-2000 RMK Converted to use the new error handling, and
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* automatically request sense data upon check
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* condition status from targets.
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*/
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#include <linux/module.h>
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#include <linux/blkdev.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/ioport.h>
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#include <linux/proc_fs.h>
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#include <linux/delay.h>
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#include <linux/bitops.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <asm/dma.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/ecard.h>
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#include "../scsi.h"
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_host.h>
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#include "fas216.h"
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#include "scsi.h"
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/* NOTE: SCSI2 Synchronous transfers *require* DMA according to
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* the data sheet. This restriction is crazy, especially when
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* you only want to send 16 bytes! What were the guys who
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* designed this chip on at that time? Did they read the SCSI2
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* spec at all? The following sections are taken from the SCSI2
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* standard (s2r10) concerning this:
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*
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* > IMPLEMENTORS NOTES:
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* > (1) Re-negotiation at every selection is not recommended, since a
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* > significant performance impact is likely.
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*
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* > The implied synchronous agreement shall remain in effect until a BUS DEVICE
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* > RESET message is received, until a hard reset condition occurs, or until one
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* > of the two SCSI devices elects to modify the agreement. The default data
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* > transfer mode is asynchronous data transfer mode. The default data transfer
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* > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard
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* > reset condition.
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*
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* In total, this means that once you have elected to use synchronous
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* transfers, you must always use DMA.
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*
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* I was thinking that this was a good chip until I found this restriction ;(
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*/
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#define SCSI2_SYNC
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#undef SCSI2_TAG
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#undef DEBUG_CONNECT
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#undef DEBUG_MESSAGES
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#undef CHECK_STRUCTURE
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#define LOG_CONNECT (1 << 0)
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#define LOG_BUSSERVICE (1 << 1)
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#define LOG_FUNCTIONDONE (1 << 2)
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#define LOG_MESSAGES (1 << 3)
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#define LOG_BUFFER (1 << 4)
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#define LOG_ERROR (1 << 8)
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static int level_mask = LOG_ERROR;
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module_param(level_mask, int, 0644);
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static int __init fas216_log_setup(char *str)
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{
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char *s;
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level_mask = 0;
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while ((s = strsep(&str, ",")) != NULL) {
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switch (s[0]) {
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case 'a':
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if (strcmp(s, "all") == 0)
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level_mask |= -1;
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break;
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case 'b':
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if (strncmp(s, "bus", 3) == 0)
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level_mask |= LOG_BUSSERVICE;
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if (strncmp(s, "buf", 3) == 0)
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level_mask |= LOG_BUFFER;
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break;
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case 'c':
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level_mask |= LOG_CONNECT;
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break;
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case 'e':
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level_mask |= LOG_ERROR;
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break;
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case 'm':
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level_mask |= LOG_MESSAGES;
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break;
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case 'n':
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if (strcmp(s, "none") == 0)
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level_mask = 0;
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break;
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case 's':
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level_mask |= LOG_FUNCTIONDONE;
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break;
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}
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}
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return 1;
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}
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__setup("fas216_logging=", fas216_log_setup);
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static inline unsigned char fas216_readb(FAS216_Info *info, unsigned int reg)
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{
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unsigned int off = reg << info->scsi.io_shift;
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return readb(info->scsi.io_base + off);
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}
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static inline void fas216_writeb(FAS216_Info *info, unsigned int reg, unsigned int val)
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{
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unsigned int off = reg << info->scsi.io_shift;
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writeb(val, info->scsi.io_base + off);
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}
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static void fas216_dumpstate(FAS216_Info *info)
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{
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unsigned char is, stat, inst;
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is = fas216_readb(info, REG_IS);
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stat = fas216_readb(info, REG_STAT);
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inst = fas216_readb(info, REG_INST);
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printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X"
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" INST=%02X IS=%02X CFIS=%02X",
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fas216_readb(info, REG_CTCL),
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fas216_readb(info, REG_CTCM),
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fas216_readb(info, REG_CMD), stat, inst, is,
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fas216_readb(info, REG_CFIS));
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printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02X\n",
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fas216_readb(info, REG_CNTL1),
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fas216_readb(info, REG_CNTL2),
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fas216_readb(info, REG_CNTL3),
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fas216_readb(info, REG_CTCH));
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}
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static void print_SCp(struct scsi_pointer *SCp, const char *prefix, const char *suffix)
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{
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printk("%sptr %p this_residual 0x%x buffer %p buffers_residual 0x%x%s",
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prefix, SCp->ptr, SCp->this_residual, SCp->buffer,
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SCp->buffers_residual, suffix);
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}
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static void fas216_dumpinfo(FAS216_Info *info)
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{
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static int used = 0;
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int i;
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if (used++)
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return;
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printk("FAS216_Info=\n");
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printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%p\n",
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info->magic_start, info->host, info->SCpnt,
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info->origSCpnt);
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printk(" scsi={ io_shift=%X irq=%X cfg={ %X %X %X %X }\n",
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info->scsi.io_shift, info->scsi.irq,
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info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2],
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info->scsi.cfg[3]);
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printk(" type=%p phase=%X\n",
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info->scsi.type, info->scsi.phase);
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print_SCp(&info->scsi.SCp, " SCp={ ", " }\n");
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printk(" msgs async_stp=%X disconnectable=%d aborting=%d }\n",
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info->scsi.async_stp,
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info->scsi.disconnectable, info->scsi.aborting);
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printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%X\n"
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" disconnects=%X aborts=%X bus_resets=%X host_resets=%X}\n",
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info->stats.queues, info->stats.removes, info->stats.fins,
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info->stats.reads, info->stats.writes, info->stats.miscs,
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info->stats.disconnects, info->stats.aborts, info->stats.bus_resets,
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info->stats.host_resets);
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printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }\n",
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info->ifcfg.clockrate, info->ifcfg.select_timeout,
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info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth);
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for (i = 0; i < 8; i++) {
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printk(" busyluns[%d]=%08lx dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }\n",
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i, info->busyluns[i], i,
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info->device[i].disconnect_ok, info->device[i].stp,
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info->device[i].sof, info->device[i].sync_state);
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}
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printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }\n",
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info->dma.transfer_type, info->dma.setup,
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info->dma.pseudo, info->dma.stop);
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printk(" internal_done=%X magic_end=%lX }\n",
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info->internal_done, info->magic_end);
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}
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#ifdef CHECK_STRUCTURE
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static void __fas216_checkmagic(FAS216_Info *info, const char *func)
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{
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int corruption = 0;
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if (info->magic_start != MAGIC) {
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printk(KERN_CRIT "FAS216 Error: magic at start corrupted\n");
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corruption++;
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}
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if (info->magic_end != MAGIC) {
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printk(KERN_CRIT "FAS216 Error: magic at end corrupted\n");
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corruption++;
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}
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if (corruption) {
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fas216_dumpinfo(info);
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panic("scsi memory space corrupted in %s", func);
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}
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}
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#define fas216_checkmagic(info) __fas216_checkmagic((info), __func__)
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#else
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#define fas216_checkmagic(info)
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#endif
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static const char *fas216_bus_phase(int stat)
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{
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static const char *phases[] = {
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"DATA OUT", "DATA IN",
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"COMMAND", "STATUS",
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"MISC OUT", "MISC IN",
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"MESG OUT", "MESG IN"
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};
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return phases[stat & STAT_BUSMASK];
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}
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static const char *fas216_drv_phase(FAS216_Info *info)
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{
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static const char *phases[] = {
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[PHASE_IDLE] = "idle",
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[PHASE_SELECTION] = "selection",
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[PHASE_COMMAND] = "command",
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[PHASE_DATAOUT] = "data out",
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[PHASE_DATAIN] = "data in",
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[PHASE_MSGIN] = "message in",
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[PHASE_MSGIN_DISCONNECT]= "disconnect",
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[PHASE_MSGOUT_EXPECT] = "expect message out",
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[PHASE_MSGOUT] = "message out",
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[PHASE_STATUS] = "status",
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[PHASE_DONE] = "done",
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};
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if (info->scsi.phase < ARRAY_SIZE(phases) &&
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phases[info->scsi.phase])
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return phases[info->scsi.phase];
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return "???";
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}
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static char fas216_target(FAS216_Info *info)
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{
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if (info->SCpnt)
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return '0' + info->SCpnt->device->id;
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else
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return 'H';
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}
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static void
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fas216_do_log(FAS216_Info *info, char target, char *fmt, va_list ap)
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{
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static char buf[1024];
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vsnprintf(buf, sizeof(buf), fmt, ap);
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printk("scsi%d.%c: %s", info->host->host_no, target, buf);
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}
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static void fas216_log_command(FAS216_Info *info, int level,
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struct scsi_cmnd *SCpnt, char *fmt, ...)
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{
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va_list args;
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if (level != 0 && !(level & level_mask))
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return;
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va_start(args, fmt);
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fas216_do_log(info, '0' + SCpnt->device->id, fmt, args);
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va_end(args);
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printk(" CDB: ");
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__scsi_print_command(SCpnt->cmnd);
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}
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static void
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fas216_log_target(FAS216_Info *info, int level, int target, char *fmt, ...)
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{
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va_list args;
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if (level != 0 && !(level & level_mask))
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return;
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if (target < 0)
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target = 'H';
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else
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target += '0';
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va_start(args, fmt);
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fas216_do_log(info, target, fmt, args);
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va_end(args);
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printk("\n");
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}
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static void fas216_log(FAS216_Info *info, int level, char *fmt, ...)
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{
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va_list args;
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if (level != 0 && !(level & level_mask))
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return;
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va_start(args, fmt);
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fas216_do_log(info, fas216_target(info), fmt, args);
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va_end(args);
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printk("\n");
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}
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#define PH_SIZE 32
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static struct { int stat, ssr, isr, ph; } ph_list[PH_SIZE];
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static int ph_ptr;
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static void add_debug_list(int stat, int ssr, int isr, int ph)
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{
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ph_list[ph_ptr].stat = stat;
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ph_list[ph_ptr].ssr = ssr;
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ph_list[ph_ptr].isr = isr;
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ph_list[ph_ptr].ph = ph;
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ph_ptr = (ph_ptr + 1) & (PH_SIZE-1);
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}
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static struct { int command; void *from; } cmd_list[8];
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static int cmd_ptr;
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static void fas216_cmd(FAS216_Info *info, unsigned int command)
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{
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cmd_list[cmd_ptr].command = command;
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cmd_list[cmd_ptr].from = __builtin_return_address(0);
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cmd_ptr = (cmd_ptr + 1) & 7;
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fas216_writeb(info, REG_CMD, command);
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}
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static void print_debug_list(void)
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{
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int i;
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i = ph_ptr;
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printk(KERN_ERR "SCSI IRQ trail\n");
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do {
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printk(" %02x:%02x:%02x:%1x",
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ph_list[i].stat, ph_list[i].ssr,
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ph_list[i].isr, ph_list[i].ph);
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i = (i + 1) & (PH_SIZE - 1);
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if (((i ^ ph_ptr) & 7) == 0)
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printk("\n");
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} while (i != ph_ptr);
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if ((i ^ ph_ptr) & 7)
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printk("\n");
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i = cmd_ptr;
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printk(KERN_ERR "FAS216 commands: ");
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do {
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printk("%02x:%p ", cmd_list[i].command, cmd_list[i].from);
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i = (i + 1) & 7;
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} while (i != cmd_ptr);
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printk("\n");
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}
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static void fas216_done(FAS216_Info *info, unsigned int result);
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/**
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* fas216_get_last_msg - retrive last message from the list
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* @info: interface to search
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* @pos: current fifo position
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*
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* Retrieve a last message from the list, using position in fifo.
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*/
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static inline unsigned short
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fas216_get_last_msg(FAS216_Info *info, int pos)
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{
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unsigned short packed_msg = NOP;
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struct message *msg;
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int msgnr = 0;
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while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
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if (pos >= msg->fifo)
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break;
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}
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if (msg) {
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if (msg->msg[0] == EXTENDED_MESSAGE)
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packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8;
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else
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packed_msg = msg->msg[0];
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}
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fas216_log(info, LOG_MESSAGES,
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"Message: %04x found at position %02x\n", packed_msg, pos);
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return packed_msg;
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}
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/**
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* fas216_syncperiod - calculate STP register value
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* @info: state structure for interface connected to device
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* @ns: period in ns (between subsequent bytes)
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*
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* Calculate value to be loaded into the STP register for a given period
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* in ns. Returns a value suitable for REG_STP.
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*/
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static int fas216_syncperiod(FAS216_Info *info, int ns)
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{
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int value = (info->ifcfg.clockrate * ns) / 1000;
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fas216_checkmagic(info);
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if (value < 4)
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value = 4;
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else if (value > 35)
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value = 35;
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return value & 31;
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}
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/**
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* fas216_set_sync - setup FAS216 chip for specified transfer period.
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* @info: state structure for interface connected to device
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* @target: target
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*
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* Correctly setup FAS216 chip for specified transfer period.
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* Notes : we need to switch the chip out of FASTSCSI mode if we have
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* a transfer period >= 200ns - otherwise the chip will violate
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* the SCSI timings.
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*/
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static void fas216_set_sync(FAS216_Info *info, int target)
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{
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unsigned int cntl3;
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fas216_writeb(info, REG_SOF, info->device[target].sof);
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fas216_writeb(info, REG_STP, info->device[target].stp);
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cntl3 = info->scsi.cfg[2];
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if (info->device[target].period >= (200 / 4))
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cntl3 = cntl3 & ~CNTL3_FASTSCSI;
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fas216_writeb(info, REG_CNTL3, cntl3);
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}
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/* Synchronous transfer support
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*
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* Note: The SCSI II r10 spec says (5.6.12):
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*
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* (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 negotiation request on
|
|
* every INQUIRY or REQUEST SENSE message, unless the target itself has
|
|
* at some point performed a synchronous transfer negotiation request, or
|
|
* we have synchronous transfers disabled for this device.
|
|
*/
|
|
|
|
/**
|
|
* fas216_handlesync - Handle a synchronous transfer message
|
|
* @info: state structure for interface
|
|
* @msg: message from target
|
|
*
|
|
* Handle a synchronous transfer message from the target
|
|
*/
|
|
static void fas216_handlesync(FAS216_Info *info, char *msg)
|
|
{
|
|
struct fas216_device *dev = &info->device[info->SCpnt->device->id];
|
|
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
|
|
* negotiation 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 negotiating a synchronous transfer,
|
|
* but the device sent us a negotiation request.
|
|
* Honour the request by sending back a SDTR
|
|
* message containing our capability, limited by
|
|
* the targets capability.
|
|
*/
|
|
default:
|
|
fas216_cmd(info, CMD_SETATN);
|
|
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 negotiation,
|
|
* 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->device->id);
|
|
break;
|
|
|
|
case reject:
|
|
fas216_cmd(info, CMD_SETATN);
|
|
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->device->id);
|
|
break;
|
|
|
|
case none:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fas216_updateptrs - update data pointers after transfer suspended/paused
|
|
* @info: interface's local pointer to update
|
|
* @bytes_transferred: number of bytes transferred
|
|
*
|
|
* Update data pointers after transfer suspended/paused
|
|
*/
|
|
static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
|
|
{
|
|
struct scsi_pointer *SCp = &info->scsi.SCp;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
BUG_ON(bytes_transferred < 0);
|
|
|
|
SCp->phase -= bytes_transferred;
|
|
|
|
while (bytes_transferred != 0) {
|
|
if (SCp->this_residual > bytes_transferred)
|
|
break;
|
|
/*
|
|
* We have used up this buffer. Move on to the
|
|
* next buffer.
|
|
*/
|
|
bytes_transferred -= SCp->this_residual;
|
|
if (!next_SCp(SCp) && bytes_transferred) {
|
|
printk(KERN_WARNING "scsi%d.%c: out of buffers\n",
|
|
info->host->host_no, '0' + info->SCpnt->device->id);
|
|
return;
|
|
}
|
|
}
|
|
|
|
SCp->this_residual -= bytes_transferred;
|
|
if (SCp->this_residual)
|
|
SCp->ptr += bytes_transferred;
|
|
else
|
|
SCp->ptr = NULL;
|
|
}
|
|
|
|
/**
|
|
* fas216_pio - transfer data off of/on to card using programmed IO
|
|
* @info: interface to transfer data to/from
|
|
* @direction: direction to transfer data (DMA_OUT/DMA_IN)
|
|
*
|
|
* Transfer data off of/on to card using programmed IO.
|
|
* Notes: this is incredibly slow.
|
|
*/
|
|
static void fas216_pio(FAS216_Info *info, fasdmadir_t direction)
|
|
{
|
|
struct scsi_pointer *SCp = &info->scsi.SCp;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
if (direction == DMA_OUT)
|
|
fas216_writeb(info, REG_FF, get_next_SCp_byte(SCp));
|
|
else
|
|
put_next_SCp_byte(SCp, fas216_readb(info, REG_FF));
|
|
|
|
if (SCp->this_residual == 0)
|
|
next_SCp(SCp);
|
|
}
|
|
|
|
static void fas216_set_stc(FAS216_Info *info, unsigned int length)
|
|
{
|
|
fas216_writeb(info, REG_STCL, length);
|
|
fas216_writeb(info, REG_STCM, length >> 8);
|
|
fas216_writeb(info, REG_STCH, length >> 16);
|
|
}
|
|
|
|
static unsigned int fas216_get_ctc(FAS216_Info *info)
|
|
{
|
|
return fas216_readb(info, REG_CTCL) +
|
|
(fas216_readb(info, REG_CTCM) << 8) +
|
|
(fas216_readb(info, REG_CTCH) << 16);
|
|
}
|
|
|
|
/**
|
|
* fas216_cleanuptransfer - clean up after a transfer has completed.
|
|
* @info: interface to clean up
|
|
*
|
|
* Update the data pointers according to the number of bytes transferred
|
|
* on the SCSI bus.
|
|
*/
|
|
static void fas216_cleanuptransfer(FAS216_Info *info)
|
|
{
|
|
unsigned long total, residual, fifo;
|
|
fasdmatype_t dmatype = info->dma.transfer_type;
|
|
|
|
info->dma.transfer_type = fasdma_none;
|
|
|
|
/*
|
|
* PIO transfers do not need to be cleaned up.
|
|
*/
|
|
if (dmatype == fasdma_pio || dmatype == fasdma_none)
|
|
return;
|
|
|
|
if (dmatype == fasdma_real_all)
|
|
total = info->scsi.SCp.phase;
|
|
else
|
|
total = info->scsi.SCp.this_residual;
|
|
|
|
residual = fas216_get_ctc(info);
|
|
|
|
fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
|
|
|
|
fas216_log(info, LOG_BUFFER, "cleaning up from previous "
|
|
"transfer: length 0x%06x, residual 0x%x, fifo %d",
|
|
total, residual, fifo);
|
|
|
|
/*
|
|
* If we were performing Data-Out, the transfer counter
|
|
* counts down each time a byte is transferred by the
|
|
* host to the FIFO. This means we must include the
|
|
* bytes left in the FIFO from the transfer counter.
|
|
*/
|
|
if (info->scsi.phase == PHASE_DATAOUT)
|
|
residual += fifo;
|
|
|
|
fas216_updateptrs(info, total - residual);
|
|
}
|
|
|
|
/**
|
|
* fas216_transfer - Perform a DMA/PIO transfer off of/on to card
|
|
* @info: interface from which device disconnected from
|
|
*
|
|
* Start a DMA/PIO transfer off of/on to card
|
|
*/
|
|
static void fas216_transfer(FAS216_Info *info)
|
|
{
|
|
fasdmadir_t direction;
|
|
fasdmatype_t dmatype;
|
|
|
|
fas216_log(info, LOG_BUFFER,
|
|
"starttransfer: buffer %p length 0x%06x reqlen 0x%06x",
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual,
|
|
info->scsi.SCp.phase);
|
|
|
|
if (!info->scsi.SCp.ptr) {
|
|
fas216_log(info, LOG_ERROR, "null buffer passed to "
|
|
"fas216_starttransfer");
|
|
print_SCp(&info->scsi.SCp, "SCp: ", "\n");
|
|
print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If we have a synchronous transfer agreement in effect, we must
|
|
* use DMA mode. If we are using asynchronous transfers, we may
|
|
* use DMA mode or PIO mode.
|
|
*/
|
|
if (info->device[info->SCpnt->device->id].sof)
|
|
dmatype = fasdma_real_all;
|
|
else
|
|
dmatype = fasdma_pio;
|
|
|
|
if (info->scsi.phase == PHASE_DATAOUT)
|
|
direction = DMA_OUT;
|
|
else
|
|
direction = DMA_IN;
|
|
|
|
if (info->dma.setup)
|
|
dmatype = info->dma.setup(info->host, &info->scsi.SCp,
|
|
direction, dmatype);
|
|
info->dma.transfer_type = dmatype;
|
|
|
|
if (dmatype == fasdma_real_all)
|
|
fas216_set_stc(info, info->scsi.SCp.phase);
|
|
else
|
|
fas216_set_stc(info, info->scsi.SCp.this_residual);
|
|
|
|
switch (dmatype) {
|
|
case fasdma_pio:
|
|
fas216_log(info, LOG_BUFFER, "PIO transfer");
|
|
fas216_writeb(info, REG_SOF, 0);
|
|
fas216_writeb(info, REG_STP, info->scsi.async_stp);
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
fas216_pio(info, direction);
|
|
break;
|
|
|
|
case fasdma_pseudo:
|
|
fas216_log(info, LOG_BUFFER, "pseudo transfer");
|
|
fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
|
|
info->dma.pseudo(info->host, &info->scsi.SCp,
|
|
direction, info->SCpnt->transfersize);
|
|
break;
|
|
|
|
case fasdma_real_block:
|
|
fas216_log(info, LOG_BUFFER, "block dma transfer");
|
|
fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
|
|
break;
|
|
|
|
case fasdma_real_all:
|
|
fas216_log(info, LOG_BUFFER, "total dma transfer");
|
|
fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
|
|
break;
|
|
|
|
default:
|
|
fas216_log(info, LOG_BUFFER | LOG_ERROR,
|
|
"invalid FAS216 DMA type");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fas216_stoptransfer - Stop a DMA transfer onto / off of the card
|
|
* @info: interface from which device disconnected from
|
|
*
|
|
* Called when we switch away from DATA IN or DATA OUT phases.
|
|
*/
|
|
static void fas216_stoptransfer(FAS216_Info *info)
|
|
{
|
|
fas216_checkmagic(info);
|
|
|
|
if (info->dma.transfer_type == fasdma_real_all ||
|
|
info->dma.transfer_type == fasdma_real_block)
|
|
info->dma.stop(info->host, &info->scsi.SCp);
|
|
|
|
fas216_cleanuptransfer(info);
|
|
|
|
if (info->scsi.phase == PHASE_DATAIN) {
|
|
unsigned int fifo;
|
|
|
|
/*
|
|
* If we were performing Data-In, then the FIFO counter
|
|
* contains the number of bytes not transferred via DMA
|
|
* from the on-board FIFO. Read them manually.
|
|
*/
|
|
fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
|
|
while (fifo && info->scsi.SCp.ptr) {
|
|
*info->scsi.SCp.ptr = fas216_readb(info, REG_FF);
|
|
fas216_updateptrs(info, 1);
|
|
fifo--;
|
|
}
|
|
} else {
|
|
/*
|
|
* After a Data-Out phase, there may be unsent
|
|
* bytes left in the FIFO. Flush them out.
|
|
*/
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
}
|
|
}
|
|
|
|
static void fas216_aborttransfer(FAS216_Info *info)
|
|
{
|
|
fas216_checkmagic(info);
|
|
|
|
if (info->dma.transfer_type == fasdma_real_all ||
|
|
info->dma.transfer_type == fasdma_real_block)
|
|
info->dma.stop(info->host, &info->scsi.SCp);
|
|
|
|
info->dma.transfer_type = fasdma_none;
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
}
|
|
|
|
static void fas216_kick(FAS216_Info *info);
|
|
|
|
/**
|
|
* fas216_disconnected_intr - handle device disconnection
|
|
* @info: interface from which device disconnected from
|
|
*
|
|
* Handle device disconnection
|
|
*/
|
|
static void fas216_disconnect_intr(FAS216_Info *info)
|
|
{
|
|
unsigned long flags;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_log(info, LOG_CONNECT, "disconnect phase=%02x",
|
|
info->scsi.phase);
|
|
|
|
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 */
|
|
info->scsi.disconnectable = 1;
|
|
info->scsi.phase = PHASE_IDLE;
|
|
info->stats.disconnects += 1;
|
|
spin_lock_irqsave(&info->host_lock, flags);
|
|
if (info->scsi.phase == PHASE_IDLE)
|
|
fas216_kick(info);
|
|
spin_unlock_irqrestore(&info->host_lock, flags);
|
|
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 %s\n",
|
|
info->host->host_no, fas216_target(info), fas216_drv_phase(info));
|
|
print_debug_list();
|
|
fas216_stoptransfer(info);
|
|
fas216_done(info, DID_ERROR);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fas216_reselected_intr - start reconnection of a device
|
|
* @info: interface which was reselected
|
|
*
|
|
* Start reconnection of a device
|
|
*/
|
|
static void
|
|
fas216_reselected_intr(FAS216_Info *info)
|
|
{
|
|
unsigned int cfis, i;
|
|
unsigned char msg[4];
|
|
unsigned char target, lun, tag;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
WARN_ON(info->scsi.phase == PHASE_SELECTION ||
|
|
info->scsi.phase == PHASE_SELSTEPS);
|
|
|
|
cfis = fas216_readb(info, REG_CFIS);
|
|
|
|
fas216_log(info, LOG_CONNECT, "reconnect phase=%02x cfis=%02x",
|
|
info->scsi.phase, cfis);
|
|
|
|
cfis &= CFIS_CF;
|
|
|
|
if (cfis < 2 || cfis > 4) {
|
|
printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselect\n",
|
|
info->host->host_no);
|
|
goto bad_message;
|
|
}
|
|
|
|
for (i = 0; i < cfis; i++)
|
|
msg[i] = fas216_readb(info, REG_FF);
|
|
|
|
if (!(msg[0] & (1 << info->host->this_id)) ||
|
|
!(msg[1] & 0x80))
|
|
goto initiator_error;
|
|
|
|
target = msg[0] & ~(1 << info->host->this_id);
|
|
target = ffs(target) - 1;
|
|
lun = msg[1] & 7;
|
|
tag = 0;
|
|
|
|
if (cfis >= 3) {
|
|
if (msg[2] != SIMPLE_QUEUE_TAG)
|
|
goto initiator_error;
|
|
|
|
tag = msg[3];
|
|
}
|
|
|
|
/* set up for synchronous transfers */
|
|
fas216_writeb(info, REG_SDID, target);
|
|
fas216_set_sync(info, target);
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
|
|
fas216_log(info, LOG_CONNECT, "Reconnected: target %1x lun %1x tag %02x",
|
|
target, lun, tag);
|
|
|
|
if (info->scsi.disconnectable && info->SCpnt) {
|
|
info->scsi.disconnectable = 0;
|
|
if (info->SCpnt->device->id == target &&
|
|
info->SCpnt->device->lun == lun &&
|
|
info->SCpnt->tag == tag) {
|
|
fas216_log(info, LOG_CONNECT, "reconnected previously executing command");
|
|
} else {
|
|
queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
|
|
fas216_log(info, LOG_CONNECT, "had to move command to disconnected queue");
|
|
info->SCpnt = NULL;
|
|
}
|
|
}
|
|
if (!info->SCpnt) {
|
|
info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected,
|
|
target, lun, tag);
|
|
fas216_log(info, LOG_CONNECT, "had to get command");
|
|
}
|
|
|
|
if (info->SCpnt) {
|
|
/*
|
|
* Restore data pointer from SAVED data pointer
|
|
*/
|
|
info->scsi.SCp = info->SCpnt->SCp;
|
|
|
|
fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]",
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
|
|
info->scsi.phase = PHASE_MSGIN;
|
|
} 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.
|
|
*/
|
|
fas216_cmd(info, CMD_SETATN);
|
|
|
|
#if 0
|
|
if (tag)
|
|
msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, tag);
|
|
else
|
|
#endif
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, ABORT);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
info->scsi.aborting = 1;
|
|
}
|
|
|
|
fas216_cmd(info, CMD_MSGACCEPTED);
|
|
return;
|
|
|
|
initiator_error:
|
|
printk(KERN_ERR "scsi%d.H: error during reselection: bytes",
|
|
info->host->host_no);
|
|
for (i = 0; i < cfis; i++)
|
|
printk(" %02x", msg[i]);
|
|
printk("\n");
|
|
bad_message:
|
|
fas216_cmd(info, CMD_SETATN);
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
fas216_cmd(info, CMD_MSGACCEPTED);
|
|
}
|
|
|
|
static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen)
|
|
{
|
|
int i;
|
|
|
|
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;
|
|
fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
|
|
"save data pointers: [%p, %X]",
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
|
|
break;
|
|
|
|
case RESTORE_POINTERS:
|
|
if (msglen != 1)
|
|
goto unrecognised;
|
|
|
|
/*
|
|
* Restore current data pointer from SAVED data pointer
|
|
*/
|
|
info->scsi.SCp = info->SCpnt->SCp;
|
|
fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
|
|
"restore data pointers: [%p, 0x%x]",
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
|
|
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;
|
|
|
|
default:
|
|
fas216_log(info, 0, "reject, last message 0x%04x",
|
|
fas216_get_last_msg(info, info->scsi.msgin_fifo));
|
|
}
|
|
break;
|
|
|
|
case NOP:
|
|
break;
|
|
|
|
case EXTENDED_MESSAGE:
|
|
if (msglen < 3)
|
|
goto unrecognised;
|
|
|
|
switch (message[2]) {
|
|
case EXTENDED_SDTR: /* Sync transfer negotiation request/reply */
|
|
fas216_handlesync(info, message);
|
|
break;
|
|
|
|
default:
|
|
goto unrecognised;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
goto unrecognised;
|
|
}
|
|
return;
|
|
|
|
unrecognised:
|
|
fas216_log(info, 0, "unrecognised message, rejecting");
|
|
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.
|
|
*/
|
|
fas216_cmd(info, CMD_NOP);
|
|
fas216_dumpstate(info);
|
|
fas216_cmd(info, CMD_SETATN);
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
fas216_dumpstate(info);
|
|
}
|
|
|
|
static int fas216_wait_cmd(FAS216_Info *info, int cmd)
|
|
{
|
|
int tout;
|
|
int stat;
|
|
|
|
fas216_cmd(info, cmd);
|
|
|
|
for (tout = 1000; tout; tout -= 1) {
|
|
stat = fas216_readb(info, REG_STAT);
|
|
if (stat & (STAT_INT|STAT_PARITYERROR))
|
|
break;
|
|
udelay(1);
|
|
}
|
|
|
|
return stat;
|
|
}
|
|
|
|
static int fas216_get_msg_byte(FAS216_Info *info)
|
|
{
|
|
unsigned int stat = fas216_wait_cmd(info, CMD_MSGACCEPTED);
|
|
|
|
if ((stat & STAT_INT) == 0)
|
|
goto timedout;
|
|
|
|
if ((stat & STAT_BUSMASK) != STAT_MESGIN)
|
|
goto unexpected_phase_change;
|
|
|
|
fas216_readb(info, REG_INST);
|
|
|
|
stat = fas216_wait_cmd(info, CMD_TRANSFERINFO);
|
|
|
|
if ((stat & STAT_INT) == 0)
|
|
goto timedout;
|
|
|
|
if (stat & STAT_PARITYERROR)
|
|
goto parity_error;
|
|
|
|
if ((stat & STAT_BUSMASK) != STAT_MESGIN)
|
|
goto unexpected_phase_change;
|
|
|
|
fas216_readb(info, REG_INST);
|
|
|
|
return fas216_readb(info, REG_FF);
|
|
|
|
timedout:
|
|
fas216_log(info, LOG_ERROR, "timed out waiting for message byte");
|
|
return -1;
|
|
|
|
unexpected_phase_change:
|
|
fas216_log(info, LOG_ERROR, "unexpected phase change: status = %02x", stat);
|
|
return -2;
|
|
|
|
parity_error:
|
|
fas216_log(info, LOG_ERROR, "parity error during message in phase");
|
|
return -3;
|
|
}
|
|
|
|
/**
|
|
* fas216_message - handle a function done interrupt from FAS216 chip
|
|
* @info: interface which caused function done interrupt
|
|
*
|
|
* Handle a function done interrupt from FAS216 chip
|
|
*/
|
|
static void fas216_message(FAS216_Info *info)
|
|
{
|
|
unsigned char *message = info->scsi.message;
|
|
unsigned int msglen = 1;
|
|
int msgbyte = 0;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
message[0] = fas216_readb(info, REG_FF);
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (msgbyte == -3)
|
|
goto parity_error;
|
|
|
|
#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
|
|
|
|
fas216_parse_message(info, message, msglen);
|
|
fas216_cmd(info, CMD_MSGACCEPTED);
|
|
return;
|
|
|
|
parity_error:
|
|
fas216_cmd(info, CMD_SETATN);
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, MSG_PARITY_ERROR);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
fas216_cmd(info, CMD_MSGACCEPTED);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* fas216_send_command - send command after all message bytes have been sent
|
|
* @info: interface which caused bus service
|
|
*
|
|
* Send a command to a target after all message bytes have been sent
|
|
*/
|
|
static void fas216_send_command(FAS216_Info *info)
|
|
{
|
|
int i;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_cmd(info, CMD_NOP|CMD_WITHDMA);
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
|
|
/* load command */
|
|
for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++)
|
|
fas216_writeb(info, REG_FF, info->SCpnt->cmnd[i]);
|
|
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
|
|
info->scsi.phase = PHASE_COMMAND;
|
|
}
|
|
|
|
/**
|
|
* fas216_send_messageout - handle bus service to send a message
|
|
* @info: interface which caused bus service
|
|
*
|
|
* Handle bus service to send a message.
|
|
* 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);
|
|
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
|
|
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++)
|
|
fas216_writeb(info, REG_FF, msg->msg[i]);
|
|
|
|
msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
|
|
start = 0;
|
|
}
|
|
} else
|
|
fas216_writeb(info, REG_FF, NOP);
|
|
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
|
|
info->scsi.phase = PHASE_MSGOUT;
|
|
}
|
|
|
|
/**
|
|
* fas216_busservice_intr - handle bus service interrupt from FAS216 chip
|
|
* @info: interface which caused bus service interrupt
|
|
* @stat: Status register contents
|
|
* @is: SCSI Status register contents
|
|
*
|
|
* Handle a bus service interrupt from FAS216 chip
|
|
*/
|
|
static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
|
|
{
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_log(info, LOG_BUSSERVICE,
|
|
"bus service: stat=%02x is=%02x phase=%02x",
|
|
stat, is, info->scsi.phase);
|
|
|
|
switch (info->scsi.phase) {
|
|
case PHASE_SELECTION:
|
|
if ((is & IS_BITS) != IS_MSGBYTESENT)
|
|
goto bad_is;
|
|
break;
|
|
|
|
case PHASE_SELSTEPS:
|
|
switch (is & 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;
|
|
}
|
|
|
|
fas216_cmd(info, CMD_NOP);
|
|
|
|
#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)) {
|
|
case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> 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 */
|
|
info->scsi.phase = PHASE_DATAIN;
|
|
fas216_transfer(info);
|
|
return;
|
|
|
|
case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */
|
|
case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */
|
|
fas216_cleanuptransfer(info);
|
|
fas216_transfer(info);
|
|
return;
|
|
|
|
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_cmd(info, CMD_FLUSHFIFO);
|
|
info->scsi.phase = PHASE_DATAOUT;
|
|
fas216_transfer(info);
|
|
return;
|
|
|
|
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 */
|
|
fas216_cmd(info, CMD_INITCMDCOMPLETE);
|
|
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 = fas216_readb(info, REG_CFIS) & CFIS_CF;
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
info->scsi.phase = PHASE_MSGIN;
|
|
return;
|
|
|
|
case STATE(STAT_MESGIN, PHASE_MSGIN):
|
|
info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
return;
|
|
|
|
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;
|
|
|
|
/*
|
|
* Message Out -> Message Out
|
|
*/
|
|
case STATE(STAT_MESGOUT, PHASE_SELSTEPS):
|
|
case STATE(STAT_MESGOUT, PHASE_MSGOUT):
|
|
/*
|
|
* If we get another message out phase, this usually
|
|
* means some parity error occurred. Resend complete
|
|
* set of messages. If we have more than one byte to
|
|
* send, we need to assert ATN again.
|
|
*/
|
|
if (info->device[info->SCpnt->device->id].parity_check) {
|
|
/*
|
|
* We were testing... good, the device
|
|
* supports parity checking.
|
|
*/
|
|
info->device[info->SCpnt->device->id].parity_check = 0;
|
|
info->device[info->SCpnt->device->id].parity_enabled = 1;
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
|
|
}
|
|
|
|
if (msgqueue_msglength(&info->scsi.msgs) > 1)
|
|
fas216_cmd(info, CMD_SETATN);
|
|
/*FALLTHROUGH*/
|
|
|
|
/*
|
|
* 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 bytes\n",
|
|
info->host->host_no, fas216_target(info));
|
|
fas216_cmd(info, CMD_SETATN);
|
|
fas216_set_stc(info, 15);
|
|
fas216_cmd(info, CMD_PADBYTES | CMD_WITHDMA);
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
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);
|
|
fas216_cmd(info, CMD_SETATN);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
|
|
info->scsi.phase = PHASE_MSGOUT_EXPECT;
|
|
info->scsi.aborting = 1;
|
|
fas216_cmd(info, CMD_TRANSFERINFO);
|
|
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:
|
|
fas216_log(info, 0, "bus service at step %d?", is & IS_BITS);
|
|
fas216_dumpstate(info);
|
|
print_debug_list();
|
|
|
|
fas216_done(info, DID_ERROR);
|
|
}
|
|
|
|
/**
|
|
* fas216_funcdone_intr - handle a function done interrupt from FAS216 chip
|
|
* @info: interface which caused function done interrupt
|
|
* @stat: Status register contents
|
|
* @is: SCSI Status register contents
|
|
*
|
|
* Handle a function done interrupt from FAS216 chip
|
|
*/
|
|
static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
|
|
{
|
|
unsigned int fifo_len = fas216_readb(info, REG_CFIS) & CFIS_CF;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_log(info, LOG_FUNCTIONDONE,
|
|
"function done: stat=%02x is=%02x phase=%02x",
|
|
stat, is, info->scsi.phase);
|
|
|
|
switch (info->scsi.phase) {
|
|
case PHASE_STATUS: /* status phase - read status and msg */
|
|
if (fifo_len != 2) {
|
|
fas216_log(info, 0, "odd number of bytes in FIFO: %d", fifo_len);
|
|
}
|
|
/*
|
|
* Read status then message byte.
|
|
*/
|
|
info->scsi.SCp.Status = fas216_readb(info, REG_FF);
|
|
info->scsi.SCp.Message = fas216_readb(info, REG_FF);
|
|
info->scsi.phase = PHASE_DONE;
|
|
fas216_cmd(info, CMD_MSGACCEPTED);
|
|
break;
|
|
|
|
case PHASE_IDLE:
|
|
case PHASE_SELECTION:
|
|
case PHASE_SELSTEPS:
|
|
break;
|
|
|
|
case PHASE_MSGIN: /* message in phase */
|
|
if ((stat & STAT_BUSMASK) == STAT_MESGIN) {
|
|
info->scsi.msgin_fifo = fifo_len;
|
|
fas216_message(info);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
fas216_log(info, 0, "internal phase %s for function done?"
|
|
" What do I do with this?",
|
|
fas216_target(info), fas216_drv_phase(info));
|
|
}
|
|
}
|
|
|
|
static void fas216_bus_reset(FAS216_Info *info)
|
|
{
|
|
neg_t sync_state;
|
|
int i;
|
|
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
|
|
sync_state = neg_invalid;
|
|
|
|
#ifdef SCSI2_SYNC
|
|
if (info->ifcfg.capabilities & (FASCAP_DMA|FASCAP_PSEUDODMA))
|
|
sync_state = neg_wait;
|
|
#endif
|
|
|
|
info->scsi.phase = PHASE_IDLE;
|
|
info->SCpnt = NULL; /* bug! */
|
|
memset(&info->scsi.SCp, 0, sizeof(info->scsi.SCp));
|
|
|
|
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].period = info->ifcfg.asyncperiod / 4;
|
|
info->device[i].stp = info->scsi.async_stp;
|
|
info->device[i].sof = 0;
|
|
info->device[i].wide_xfer = 0;
|
|
}
|
|
|
|
info->rst_bus_status = 1;
|
|
wake_up(&info->eh_wait);
|
|
}
|
|
|
|
/**
|
|
* fas216_intr - handle interrupts to progress a command
|
|
* @info: interface to service
|
|
*
|
|
* Handle interrupts from the interface to progress a command
|
|
*/
|
|
irqreturn_t fas216_intr(FAS216_Info *info)
|
|
{
|
|
unsigned char inst, is, stat;
|
|
int handled = IRQ_NONE;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
stat = fas216_readb(info, REG_STAT);
|
|
is = fas216_readb(info, REG_IS);
|
|
inst = fas216_readb(info, REG_INST);
|
|
|
|
add_debug_list(stat, is, inst, info->scsi.phase);
|
|
|
|
if (stat & STAT_INT) {
|
|
if (inst & INST_BUSRESET) {
|
|
fas216_log(info, 0, "bus reset detected");
|
|
fas216_bus_reset(info);
|
|
scsi_report_bus_reset(info->host, 0);
|
|
} else if (inst & INST_ILLEGALCMD) {
|
|
fas216_log(info, LOG_ERROR, "illegal command given\n");
|
|
fas216_dumpstate(info);
|
|
print_debug_list();
|
|
} else if (inst & INST_DISCONNECT)
|
|
fas216_disconnect_intr(info);
|
|
else if (inst & INST_RESELECTED) /* reselected */
|
|
fas216_reselected_intr(info);
|
|
else if (inst & INST_BUSSERVICE) /* bus service request */
|
|
fas216_busservice_intr(info, stat, is);
|
|
else if (inst & INST_FUNCDONE) /* function done */
|
|
fas216_funcdone_intr(info, stat, is);
|
|
else
|
|
fas216_log(info, 0, "unknown interrupt received:"
|
|
" phase %s inst %02X is %02X stat %02X",
|
|
fas216_drv_phase(info), inst, is, stat);
|
|
handled = IRQ_HANDLED;
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
static void __fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
|
|
{
|
|
int tot_msglen;
|
|
|
|
/* following what the ESP driver says */
|
|
fas216_set_stc(info, 0);
|
|
fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
|
|
|
|
/* flush FIFO */
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
|
|
/* load bus-id and timeout */
|
|
fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
|
|
fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
|
|
|
|
/* synchronous transfers */
|
|
fas216_set_sync(info, SCpnt->device->id);
|
|
|
|
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->device->id);
|
|
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++)
|
|
fas216_writeb(info, REG_FF, msg->msg[i]);
|
|
msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
|
|
}
|
|
|
|
/* load command */
|
|
for (i = 0; i < SCpnt->cmd_len; i++)
|
|
fas216_writeb(info, REG_FF, SCpnt->cmnd[i]);
|
|
|
|
if (tot_msglen == 1)
|
|
fas216_cmd(info, CMD_SELECTATN);
|
|
else
|
|
fas216_cmd(info, CMD_SELECTATN3);
|
|
} 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);
|
|
|
|
fas216_writeb(info, REG_FF, msg->msg[0]);
|
|
msg->fifo = 1;
|
|
|
|
fas216_cmd(info, CMD_SELECTATNSTOP);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Decide whether we need to perform a parity test on this device.
|
|
* Can also be used to force parity error conditions during initial
|
|
* information transfer phase (message out) for test purposes.
|
|
*/
|
|
static int parity_test(FAS216_Info *info, int target)
|
|
{
|
|
#if 0
|
|
if (target == 3) {
|
|
info->device[target].parity_check = 0;
|
|
return 1;
|
|
}
|
|
#endif
|
|
return info->device[target].parity_check;
|
|
}
|
|
|
|
static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
|
|
{
|
|
int disconnect_ok;
|
|
|
|
/*
|
|
* claim host busy
|
|
*/
|
|
info->scsi.phase = PHASE_SELECTION;
|
|
info->scsi.SCp = SCpnt->SCp;
|
|
info->SCpnt = SCpnt;
|
|
info->dma.transfer_type = fasdma_none;
|
|
|
|
if (parity_test(info, SCpnt->device->id))
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_PTE);
|
|
else
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
|
|
|
|
/*
|
|
* Don't allow request sense commands to disconnect.
|
|
*/
|
|
disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE &&
|
|
info->device[SCpnt->device->id].disconnect_ok;
|
|
|
|
/*
|
|
* build outgoing message bytes
|
|
*/
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->device->lun));
|
|
|
|
/*
|
|
* add tag message if required
|
|
*/
|
|
if (SCpnt->tag)
|
|
msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag);
|
|
|
|
do {
|
|
#ifdef SCSI2_SYNC
|
|
if ((info->device[SCpnt->device->id].sync_state == neg_wait ||
|
|
info->device[SCpnt->device->id].sync_state == neg_complete) &&
|
|
(SCpnt->cmnd[0] == REQUEST_SENSE ||
|
|
SCpnt->cmnd[0] == INQUIRY)) {
|
|
info->device[SCpnt->device->id].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);
|
|
|
|
__fas216_start_command(info, SCpnt);
|
|
}
|
|
|
|
static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt)
|
|
{
|
|
#ifdef SCSI2_TAG
|
|
/*
|
|
* tagged queuing - allocate a new tag to this command
|
|
*/
|
|
if (SCpnt->device->simple_tags && 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->device->id * 8 + SCpnt->device->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;
|
|
}
|
|
}
|
|
|
|
static void fas216_do_bus_device_reset(FAS216_Info *info,
|
|
struct scsi_cmnd *SCpnt)
|
|
{
|
|
struct message *msg;
|
|
|
|
/*
|
|
* claim host busy
|
|
*/
|
|
info->scsi.phase = PHASE_SELECTION;
|
|
info->scsi.SCp = SCpnt->SCp;
|
|
info->SCpnt = SCpnt;
|
|
info->dma.transfer_type = fasdma_none;
|
|
|
|
fas216_log(info, LOG_ERROR, "sending bus device reset");
|
|
|
|
msgqueue_flush(&info->scsi.msgs);
|
|
msgqueue_addmsg(&info->scsi.msgs, 1, BUS_DEVICE_RESET);
|
|
|
|
/* following what the ESP driver says */
|
|
fas216_set_stc(info, 0);
|
|
fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
|
|
|
|
/* flush FIFO */
|
|
fas216_cmd(info, CMD_FLUSHFIFO);
|
|
|
|
/* load bus-id and timeout */
|
|
fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
|
|
fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
|
|
|
|
/* synchronous transfers */
|
|
fas216_set_sync(info, SCpnt->device->id);
|
|
|
|
msg = msgqueue_getmsg(&info->scsi.msgs, 0);
|
|
|
|
fas216_writeb(info, REG_FF, BUS_DEVICE_RESET);
|
|
msg->fifo = 1;
|
|
|
|
fas216_cmd(info, CMD_SELECTATNSTOP);
|
|
}
|
|
|
|
/**
|
|
* fas216_kick - kick a command to the interface
|
|
* @info: our host interface to kick
|
|
*
|
|
* Kick a command to the interface, interface should be idle.
|
|
* Notes: Interrupts are always disabled!
|
|
*/
|
|
static void fas216_kick(FAS216_Info *info)
|
|
{
|
|
struct scsi_cmnd *SCpnt = NULL;
|
|
#define TYPE_OTHER 0
|
|
#define TYPE_RESET 1
|
|
#define TYPE_QUEUE 2
|
|
int where_from = TYPE_OTHER;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
/*
|
|
* Obtain the next command to process.
|
|
*/
|
|
do {
|
|
if (info->rstSCpnt) {
|
|
SCpnt = info->rstSCpnt;
|
|
/* don't remove it */
|
|
where_from = TYPE_RESET;
|
|
break;
|
|
}
|
|
|
|
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);
|
|
where_from = TYPE_QUEUE;
|
|
break;
|
|
}
|
|
} while (0);
|
|
|
|
if (!SCpnt) {
|
|
/*
|
|
* no command pending, so enable reselection.
|
|
*/
|
|
fas216_cmd(info, CMD_ENABLESEL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We're going to start a command, so disable reselection
|
|
*/
|
|
fas216_cmd(info, CMD_DISABLESEL);
|
|
|
|
if (info->scsi.disconnectable && info->SCpnt) {
|
|
fas216_log(info, LOG_CONNECT,
|
|
"moved command for %d to disconnected queue",
|
|
info->SCpnt->device->id);
|
|
queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
|
|
info->scsi.disconnectable = 0;
|
|
info->SCpnt = NULL;
|
|
}
|
|
|
|
fas216_log_command(info, LOG_CONNECT | LOG_MESSAGES, SCpnt,
|
|
"starting");
|
|
|
|
switch (where_from) {
|
|
case TYPE_QUEUE:
|
|
fas216_allocate_tag(info, SCpnt);
|
|
case TYPE_OTHER:
|
|
fas216_start_command(info, SCpnt);
|
|
break;
|
|
case TYPE_RESET:
|
|
fas216_do_bus_device_reset(info, SCpnt);
|
|
break;
|
|
}
|
|
|
|
fas216_log(info, LOG_CONNECT, "select: data pointers [%p, %X]",
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
|
|
|
|
/*
|
|
* should now get either DISCONNECT or
|
|
* (FUNCTION DONE with BUS SERVICE) interrupt
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Clean up from issuing a BUS DEVICE RESET message to a device.
|
|
*/
|
|
static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
|
|
unsigned int result)
|
|
{
|
|
fas216_log(info, LOG_ERROR, "fas216 device reset complete");
|
|
|
|
info->rstSCpnt = NULL;
|
|
info->rst_dev_status = 1;
|
|
wake_up(&info->eh_wait);
|
|
}
|
|
|
|
/**
|
|
* fas216_rq_sns_done - Finish processing automatic request sense command
|
|
* @info: interface that completed
|
|
* @SCpnt: command that completed
|
|
* @result: driver byte of result
|
|
*
|
|
* Finish processing automatic request sense command
|
|
*/
|
|
static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
|
|
unsigned int result)
|
|
{
|
|
fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
|
|
"request sense complete, result=0x%04x%02x%02x",
|
|
result, SCpnt->SCp.Message, SCpnt->SCp.Status);
|
|
|
|
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));
|
|
//printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id);
|
|
//{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); }
|
|
/*
|
|
* 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.
|
|
*/
|
|
scsi_eh_restore_cmnd(SCpnt, &info->ses);
|
|
SCpnt->scsi_done(SCpnt);
|
|
}
|
|
|
|
/**
|
|
* fas216_std_done - finish processing of standard command
|
|
* @info: interface that completed
|
|
* @SCpnt: command that completed
|
|
* @result: driver byte of result
|
|
*
|
|
* Finish processing of standard command
|
|
*/
|
|
static void
|
|
fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result)
|
|
{
|
|
info->stats.fins += 1;
|
|
|
|
SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 |
|
|
info->scsi.SCp.Status;
|
|
|
|
fas216_log_command(info, LOG_CONNECT, SCpnt,
|
|
"command complete, result=0x%08x", SCpnt->result);
|
|
|
|
/*
|
|
* If the driver detected an error, we're all done.
|
|
*/
|
|
if (host_byte(SCpnt->result) != DID_OK ||
|
|
msg_byte(SCpnt->result) != COMMAND_COMPLETE)
|
|
goto done;
|
|
|
|
/*
|
|
* If the command returned CHECK_CONDITION or COMMAND_TERMINATED
|
|
* status, request the sense information.
|
|
*/
|
|
if (status_byte(SCpnt->result) == CHECK_CONDITION ||
|
|
status_byte(SCpnt->result) == COMMAND_TERMINATED)
|
|
goto request_sense;
|
|
|
|
/*
|
|
* If the command did not complete with GOOD status,
|
|
* we are all done here.
|
|
*/
|
|
if (status_byte(SCpnt->result) != 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 MODE_SENSE:
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "scsi%d.%c: incomplete data transfer "
|
|
"detected: res=%08X ptr=%p len=%X CDB: ",
|
|
info->host->host_no, '0' + SCpnt->device->id,
|
|
SCpnt->result, info->scsi.SCp.ptr,
|
|
info->scsi.SCp.this_residual);
|
|
__scsi_print_command(SCpnt->cmnd);
|
|
SCpnt->result &= ~(255 << 16);
|
|
SCpnt->result |= DID_BAD_TARGET << 16;
|
|
goto request_sense;
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (SCpnt->scsi_done) {
|
|
SCpnt->scsi_done(SCpnt);
|
|
return;
|
|
}
|
|
|
|
panic("scsi%d.H: null scsi_done function in fas216_done",
|
|
info->host->host_no);
|
|
|
|
|
|
request_sense:
|
|
if (SCpnt->cmnd[0] == REQUEST_SENSE)
|
|
goto done;
|
|
|
|
scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0);
|
|
fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
|
|
"requesting sense");
|
|
init_SCp(SCpnt);
|
|
SCpnt->SCp.Message = 0;
|
|
SCpnt->SCp.Status = 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 command\n",
|
|
info->host->host_no, '0' + SCpnt->device->id);
|
|
info->reqSCpnt = SCpnt;
|
|
}
|
|
|
|
/**
|
|
* fas216_done - complete processing for current command
|
|
* @info: interface that completed
|
|
* @result: driver byte of result
|
|
*
|
|
* Complete processing for current command
|
|
*/
|
|
static void fas216_done(FAS216_Info *info, unsigned int result)
|
|
{
|
|
void (*fn)(FAS216_Info *, struct scsi_cmnd *, unsigned int);
|
|
struct scsi_cmnd *SCpnt;
|
|
unsigned long flags;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
if (!info->SCpnt)
|
|
goto no_command;
|
|
|
|
SCpnt = info->SCpnt;
|
|
info->SCpnt = NULL;
|
|
info->scsi.phase = PHASE_IDLE;
|
|
|
|
if (info->scsi.aborting) {
|
|
fas216_log(info, 0, "uncaught abort - returning DID_ABORT");
|
|
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 CDB: ",
|
|
info->host->host_no, '0' + SCpnt->device->id,
|
|
info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
|
|
info->scsi.SCp.ptr = NULL;
|
|
__scsi_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.
|
|
*/
|
|
info->device[SCpnt->device->id].parity_check = 0;
|
|
clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, info->busyluns);
|
|
|
|
fn = (void (*)(FAS216_Info *, struct scsi_cmnd *, unsigned int))SCpnt->host_scribble;
|
|
fn(info, SCpnt, result);
|
|
|
|
if (info->scsi.irq != NO_IRQ) {
|
|
spin_lock_irqsave(&info->host_lock, flags);
|
|
if (info->scsi.phase == PHASE_IDLE)
|
|
fas216_kick(info);
|
|
spin_unlock_irqrestore(&info->host_lock, flags);
|
|
}
|
|
return;
|
|
|
|
no_command:
|
|
panic("scsi%d.H: null command in fas216_done",
|
|
info->host->host_no);
|
|
}
|
|
|
|
/**
|
|
* fas216_queue_command - queue a command for adapter to process.
|
|
* @SCpnt: Command to queue
|
|
* @done: done function to call once command is complete
|
|
*
|
|
* Queue a command for adapter to process.
|
|
* Returns: 0 on success, else error.
|
|
* Notes: io_request_lock is held, interrupts are disabled.
|
|
*/
|
|
int fas216_queue_command(struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
int result;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_log_command(info, LOG_CONNECT, SCpnt,
|
|
"received command (%p)", SCpnt);
|
|
|
|
SCpnt->scsi_done = done;
|
|
SCpnt->host_scribble = (void *)fas216_std_done;
|
|
SCpnt->result = 0;
|
|
|
|
init_SCp(SCpnt);
|
|
|
|
info->stats.queues += 1;
|
|
SCpnt->tag = 0;
|
|
|
|
spin_lock(&info->host_lock);
|
|
|
|
/*
|
|
* 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->scsi.phase == PHASE_IDLE)
|
|
fas216_kick(info);
|
|
spin_unlock(&info->host_lock);
|
|
|
|
fas216_log_target(info, LOG_CONNECT, -1, "queue %s",
|
|
result ? "failure" : "success");
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* fas216_internal_done - trigger restart of a waiting thread in fas216_noqueue_command
|
|
* @SCpnt: Command to wake
|
|
*
|
|
* Trigger restart of a waiting thread in fas216_command
|
|
*/
|
|
static void fas216_internal_done(struct scsi_cmnd *SCpnt)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
info->internal_done = 1;
|
|
}
|
|
|
|
/**
|
|
* fas216_noqueue_command - process a command for the adapter.
|
|
* @SCpnt: Command to queue
|
|
*
|
|
* Queue a command for adapter to process.
|
|
* Returns: scsi result code.
|
|
* Notes: io_request_lock is held, interrupts are disabled.
|
|
*/
|
|
int fas216_noqueue_command(struct scsi_cmnd *SCpnt,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->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.
|
|
*/
|
|
BUG_ON(info->scsi.irq != NO_IRQ);
|
|
|
|
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(info->host->host_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 (fas216_readb(info, REG_STAT) & STAT_INT) {
|
|
spin_lock_irq(info->host->host_lock);
|
|
fas216_intr(info);
|
|
spin_unlock_irq(info->host->host_lock);
|
|
}
|
|
}
|
|
|
|
spin_lock_irq(info->host->host_lock);
|
|
|
|
done(SCpnt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Error handler timeout function. Indicate that we timed out,
|
|
* and wake up any error handler process so it can continue.
|
|
*/
|
|
static void fas216_eh_timer(unsigned long data)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)data;
|
|
|
|
fas216_log(info, LOG_ERROR, "error handling timed out\n");
|
|
|
|
del_timer(&info->eh_timer);
|
|
|
|
if (info->rst_bus_status == 0)
|
|
info->rst_bus_status = -1;
|
|
if (info->rst_dev_status == 0)
|
|
info->rst_dev_status = -1;
|
|
|
|
wake_up(&info->eh_wait);
|
|
}
|
|
|
|
enum res_find {
|
|
res_failed, /* not found */
|
|
res_success, /* command on issue queue */
|
|
res_hw_abort /* command on disconnected dev */
|
|
};
|
|
|
|
/**
|
|
* fas216_do_abort - decide how to abort a command
|
|
* @SCpnt: command to abort
|
|
*
|
|
* Decide how to abort a command.
|
|
* Returns: abort status
|
|
*/
|
|
static enum res_find fas216_find_command(FAS216_Info *info,
|
|
struct scsi_cmnd *SCpnt)
|
|
{
|
|
enum res_find 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;
|
|
clear_bit(SCpnt->device->id * 8 + SCpnt->device->lun, info->busyluns);
|
|
printk("waiting for execution ");
|
|
res = res_success;
|
|
} else
|
|
printk("unknown ");
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* fas216_eh_abort - abort this command
|
|
* @SCpnt: command to abort
|
|
*
|
|
* Abort this command.
|
|
* Returns: FAILED if unable to abort
|
|
* Notes: io_request_lock is taken, and irqs are disabled
|
|
*/
|
|
int fas216_eh_abort(struct scsi_cmnd *SCpnt)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
int result = FAILED;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
info->stats.aborts += 1;
|
|
|
|
printk(KERN_WARNING "scsi%d: abort command ", info->host->host_no);
|
|
__scsi_print_command(SCpnt->cmnd);
|
|
|
|
print_debug_list();
|
|
fas216_dumpstate(info);
|
|
|
|
printk(KERN_WARNING "scsi%d: abort %p ", info->host->host_no, SCpnt);
|
|
|
|
switch (fas216_find_command(info, SCpnt)) {
|
|
/*
|
|
* 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("success\n");
|
|
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("failed\n");
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* fas216_eh_device_reset - Reset the device associated with this command
|
|
* @SCpnt: command specifing device to reset
|
|
*
|
|
* Reset the device associated with this command.
|
|
* Returns: FAILED if unable to reset.
|
|
* Notes: We won't be re-entered, so we'll only have one device
|
|
* reset on the go at one time.
|
|
*/
|
|
int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
unsigned long flags;
|
|
int i, res = FAILED, target = SCpnt->device->id;
|
|
|
|
fas216_log(info, LOG_ERROR, "device reset for target %d", target);
|
|
|
|
spin_lock_irqsave(&info->host_lock, flags);
|
|
|
|
do {
|
|
/*
|
|
* If we are currently connected to a device, and
|
|
* it is the device we want to reset, there is
|
|
* nothing we can do here. Chances are it is stuck,
|
|
* and we need a bus reset.
|
|
*/
|
|
if (info->SCpnt && !info->scsi.disconnectable &&
|
|
info->SCpnt->device->id == SCpnt->device->id)
|
|
break;
|
|
|
|
/*
|
|
* We're going to be resetting this device. Remove
|
|
* all pending commands from the driver. By doing
|
|
* so, we guarantee that we won't touch the command
|
|
* structures except to process the reset request.
|
|
*/
|
|
queue_remove_all_target(&info->queues.issue, target);
|
|
queue_remove_all_target(&info->queues.disconnected, target);
|
|
if (info->origSCpnt && info->origSCpnt->device->id == target)
|
|
info->origSCpnt = NULL;
|
|
if (info->reqSCpnt && info->reqSCpnt->device->id == target)
|
|
info->reqSCpnt = NULL;
|
|
for (i = 0; i < 8; i++)
|
|
clear_bit(target * 8 + i, info->busyluns);
|
|
|
|
/*
|
|
* Hijack this SCSI command structure to send
|
|
* a bus device reset message to this device.
|
|
*/
|
|
SCpnt->host_scribble = (void *)fas216_devicereset_done;
|
|
|
|
info->rst_dev_status = 0;
|
|
info->rstSCpnt = SCpnt;
|
|
|
|
if (info->scsi.phase == PHASE_IDLE)
|
|
fas216_kick(info);
|
|
|
|
mod_timer(&info->eh_timer, 30 * HZ);
|
|
spin_unlock_irqrestore(&info->host_lock, flags);
|
|
|
|
/*
|
|
* Wait up to 30 seconds for the reset to complete.
|
|
*/
|
|
wait_event(info->eh_wait, info->rst_dev_status);
|
|
|
|
del_timer_sync(&info->eh_timer);
|
|
spin_lock_irqsave(&info->host_lock, flags);
|
|
info->rstSCpnt = NULL;
|
|
|
|
if (info->rst_dev_status == 1)
|
|
res = SUCCESS;
|
|
} while (0);
|
|
|
|
SCpnt->host_scribble = NULL;
|
|
spin_unlock_irqrestore(&info->host_lock, flags);
|
|
|
|
fas216_log(info, LOG_ERROR, "device reset complete: %s\n",
|
|
res == SUCCESS ? "success" : "failed");
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* fas216_eh_bus_reset - Reset the bus associated with the command
|
|
* @SCpnt: command specifing bus to reset
|
|
*
|
|
* Reset the bus associated with the command.
|
|
* Returns: FAILED if unable to reset.
|
|
* Notes: Further commands are blocked.
|
|
*/
|
|
int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
unsigned long flags;
|
|
struct scsi_device *SDpnt;
|
|
|
|
fas216_checkmagic(info);
|
|
fas216_log(info, LOG_ERROR, "resetting bus");
|
|
|
|
info->stats.bus_resets += 1;
|
|
|
|
spin_lock_irqsave(&info->host_lock, flags);
|
|
|
|
/*
|
|
* Stop all activity on this interface.
|
|
*/
|
|
fas216_aborttransfer(info);
|
|
fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
|
|
|
|
/*
|
|
* Clear any pending interrupts.
|
|
*/
|
|
while (fas216_readb(info, REG_STAT) & STAT_INT)
|
|
fas216_readb(info, REG_INST);
|
|
|
|
info->rst_bus_status = 0;
|
|
|
|
/*
|
|
* For each attached hard-reset device, clear out
|
|
* all command structures. Leave the running
|
|
* command in place.
|
|
*/
|
|
shost_for_each_device(SDpnt, info->host) {
|
|
int i;
|
|
|
|
if (SDpnt->soft_reset)
|
|
continue;
|
|
|
|
queue_remove_all_target(&info->queues.issue, SDpnt->id);
|
|
queue_remove_all_target(&info->queues.disconnected, SDpnt->id);
|
|
if (info->origSCpnt && info->origSCpnt->device->id == SDpnt->id)
|
|
info->origSCpnt = NULL;
|
|
if (info->reqSCpnt && info->reqSCpnt->device->id == SDpnt->id)
|
|
info->reqSCpnt = NULL;
|
|
info->SCpnt = NULL;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
clear_bit(SDpnt->id * 8 + i, info->busyluns);
|
|
}
|
|
|
|
info->scsi.phase = PHASE_IDLE;
|
|
|
|
/*
|
|
* Reset the SCSI bus. Device cleanup happens in
|
|
* the interrupt handler.
|
|
*/
|
|
fas216_cmd(info, CMD_RESETSCSI);
|
|
|
|
mod_timer(&info->eh_timer, jiffies + HZ);
|
|
spin_unlock_irqrestore(&info->host_lock, flags);
|
|
|
|
/*
|
|
* Wait one second for the interrupt.
|
|
*/
|
|
wait_event(info->eh_wait, info->rst_bus_status);
|
|
del_timer_sync(&info->eh_timer);
|
|
|
|
fas216_log(info, LOG_ERROR, "bus reset complete: %s\n",
|
|
info->rst_bus_status == 1 ? "success" : "failed");
|
|
|
|
return info->rst_bus_status == 1 ? SUCCESS : FAILED;
|
|
}
|
|
|
|
/**
|
|
* fas216_init_chip - Initialise FAS216 state after reset
|
|
* @info: state structure for interface
|
|
*
|
|
* Initialise FAS216 state after reset
|
|
*/
|
|
static void fas216_init_chip(FAS216_Info *info)
|
|
{
|
|
unsigned int clock = ((info->ifcfg.clockrate - 1) / 5 + 1) & 7;
|
|
fas216_writeb(info, REG_CLKF, clock);
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
|
|
fas216_writeb(info, REG_CNTL2, info->scsi.cfg[1]);
|
|
fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
|
|
fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
|
|
fas216_writeb(info, REG_SOF, 0);
|
|
fas216_writeb(info, REG_STP, info->scsi.async_stp);
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
|
|
}
|
|
|
|
/**
|
|
* fas216_eh_host_reset - Reset the host associated with this command
|
|
* @SCpnt: command specifing host to reset
|
|
*
|
|
* Reset the host associated with this command.
|
|
* Returns: FAILED if unable to reset.
|
|
* Notes: io_request_lock is taken, and irqs are disabled
|
|
*/
|
|
int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
|
|
|
|
spin_lock_irq(info->host->host_lock);
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
printk("scsi%d.%c: %s: resetting host\n",
|
|
info->host->host_no, '0' + SCpnt->device->id, __func__);
|
|
|
|
/*
|
|
* Reset the SCSI chip.
|
|
*/
|
|
fas216_cmd(info, CMD_RESETCHIP);
|
|
|
|
/*
|
|
* Ugly ugly ugly!
|
|
* We need to release the host_lock and enable
|
|
* IRQs if we sleep, but we must relock and disable
|
|
* IRQs after the sleep.
|
|
*/
|
|
spin_unlock_irq(info->host->host_lock);
|
|
msleep(50 * 1000/100);
|
|
spin_lock_irq(info->host->host_lock);
|
|
|
|
/*
|
|
* Release the SCSI reset.
|
|
*/
|
|
fas216_cmd(info, CMD_NOP);
|
|
|
|
fas216_init_chip(info);
|
|
|
|
spin_unlock_irq(info->host->host_lock);
|
|
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.
|
|
*/
|
|
fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
|
|
udelay(50);
|
|
fas216_writeb(info, REG_CMD, CMD_NOP);
|
|
|
|
/*
|
|
* Check to see if control reg 2 is present.
|
|
*/
|
|
fas216_writeb(info, REG_CNTL3, 0);
|
|
fas216_writeb(info, REG_CNTL2, CNTL2_S2FE);
|
|
|
|
/*
|
|
* If we are unable to read back control reg 2
|
|
* correctly, it is not present, and we have a
|
|
* NCR53C90.
|
|
*/
|
|
if ((fas216_readb(info, REG_CNTL2) & (~0xe0)) != CNTL2_S2FE)
|
|
return TYPE_NCR53C90;
|
|
|
|
/*
|
|
* Now, check control register 3
|
|
*/
|
|
fas216_writeb(info, REG_CNTL2, 0);
|
|
fas216_writeb(info, REG_CNTL3, 0);
|
|
fas216_writeb(info, REG_CNTL3, 5);
|
|
|
|
/*
|
|
* If we are unable to read the register back
|
|
* correctly, we have a NCR53C90A
|
|
*/
|
|
if (fas216_readb(info, REG_CNTL3) != 5)
|
|
return TYPE_NCR53C90A;
|
|
|
|
/*
|
|
* Now read the ID from the chip.
|
|
*/
|
|
fas216_writeb(info, REG_CNTL3, 0);
|
|
|
|
fas216_writeb(info, REG_CNTL3, CNTL3_ADIDCHK);
|
|
fas216_writeb(info, REG_CNTL3, 0);
|
|
|
|
fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
|
|
udelay(50);
|
|
fas216_writeb(info, REG_CMD, CMD_WITHDMA | CMD_NOP);
|
|
|
|
fas216_writeb(info, REG_CNTL2, CNTL2_ENF);
|
|
fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
|
|
udelay(50);
|
|
fas216_writeb(info, REG_CMD, CMD_NOP);
|
|
|
|
rev = fas216_readb(info, REG_ID);
|
|
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 %x\n", family, rev);
|
|
return TYPE_NCR53C9x;
|
|
}
|
|
|
|
/**
|
|
* fas216_reset_state - Initialise driver internal state
|
|
* @info: state to initialise
|
|
*
|
|
* Initialise driver internal state
|
|
*/
|
|
static void fas216_reset_state(FAS216_Info *info)
|
|
{
|
|
int i;
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
fas216_bus_reset(info);
|
|
|
|
/*
|
|
* Clear out all stale info in our state structure
|
|
*/
|
|
memset(info->busyluns, 0, sizeof(info->busyluns));
|
|
info->scsi.disconnectable = 0;
|
|
info->scsi.aborting = 0;
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
info->device[i].parity_enabled = 0;
|
|
info->device[i].parity_check = 1;
|
|
}
|
|
|
|
/*
|
|
* Drain all commands on disconnected queue
|
|
*/
|
|
while (queue_remove(&info->queues.disconnected) != NULL);
|
|
|
|
/*
|
|
* Remove executing commands.
|
|
*/
|
|
info->SCpnt = NULL;
|
|
info->reqSCpnt = NULL;
|
|
info->rstSCpnt = NULL;
|
|
info->origSCpnt = NULL;
|
|
}
|
|
|
|
/**
|
|
* fas216_init - initialise FAS/NCR/AMD SCSI structures.
|
|
* @host: a driver-specific filled-out structure
|
|
*
|
|
* Initialise FAS/NCR/AMD SCSI structures.
|
|
* Returns: 0 on success
|
|
*/
|
|
int fas216_init(struct Scsi_Host *host)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)host->hostdata;
|
|
|
|
info->magic_start = MAGIC;
|
|
info->magic_end = MAGIC;
|
|
info->host = host;
|
|
info->scsi.cfg[0] = host->this_id | CNTL1_PERE;
|
|
info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE;
|
|
info->scsi.cfg[2] = info->ifcfg.cntl3 |
|
|
CNTL3_ADIDCHK | CNTL3_QTAG | CNTL3_G2CB | CNTL3_LBTM;
|
|
info->scsi.async_stp = fas216_syncperiod(info, info->ifcfg.asyncperiod);
|
|
|
|
info->rst_dev_status = -1;
|
|
info->rst_bus_status = -1;
|
|
init_waitqueue_head(&info->eh_wait);
|
|
init_timer(&info->eh_timer);
|
|
info->eh_timer.data = (unsigned long)info;
|
|
info->eh_timer.function = fas216_eh_timer;
|
|
|
|
spin_lock_init(&info->host_lock);
|
|
|
|
memset(&info->stats, 0, sizeof(info->stats));
|
|
|
|
msgqueue_initialise(&info->scsi.msgs);
|
|
|
|
if (!queue_initialise(&info->queues.issue))
|
|
return -ENOMEM;
|
|
|
|
if (!queue_initialise(&info->queues.disconnected)) {
|
|
queue_free(&info->queues.issue);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fas216_add - initialise FAS/NCR/AMD SCSI ic.
|
|
* @host: a driver-specific filled-out structure
|
|
* @dev: parent device
|
|
*
|
|
* Initialise FAS/NCR/AMD SCSI ic.
|
|
* Returns: 0 on success
|
|
*/
|
|
int fas216_add(struct Scsi_Host *host, struct device *dev)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)host->hostdata;
|
|
int type, ret;
|
|
|
|
if (info->ifcfg.clockrate <= 10 || info->ifcfg.clockrate > 40) {
|
|
printk(KERN_CRIT "fas216: invalid clock rate %u MHz\n",
|
|
info->ifcfg.clockrate);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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.
|
|
*/
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_DISR);
|
|
fas216_writeb(info, REG_CMD, CMD_RESETSCSI);
|
|
|
|
/*
|
|
* scsi standard says wait 250ms
|
|
*/
|
|
spin_unlock_irq(info->host->host_lock);
|
|
msleep(100*1000/100);
|
|
spin_lock_irq(info->host->host_lock);
|
|
|
|
fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
|
|
fas216_readb(info, REG_INST);
|
|
|
|
fas216_checkmagic(info);
|
|
|
|
ret = scsi_add_host(host, dev);
|
|
if (ret)
|
|
fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
|
|
else
|
|
scsi_scan_host(host);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void fas216_remove(struct Scsi_Host *host)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)host->hostdata;
|
|
|
|
fas216_checkmagic(info);
|
|
scsi_remove_host(host);
|
|
|
|
fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
|
|
scsi_host_put(host);
|
|
}
|
|
|
|
/**
|
|
* fas216_release - release all resources for FAS/NCR/AMD SCSI ic.
|
|
* @host: a driver-specific filled-out structure
|
|
*
|
|
* release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
|
|
*/
|
|
void fas216_release(struct Scsi_Host *host)
|
|
{
|
|
FAS216_Info *info = (FAS216_Info *)host->hostdata;
|
|
|
|
queue_free(&info->queues.disconnected);
|
|
queue_free(&info->queues.issue);
|
|
}
|
|
|
|
int fas216_print_host(FAS216_Info *info, char *buffer)
|
|
{
|
|
return sprintf(buffer,
|
|
"\n"
|
|
"Chip : %s\n"
|
|
" Address: 0x%p\n"
|
|
" IRQ : %d\n"
|
|
" DMA : %d\n",
|
|
info->scsi.type, info->scsi.io_base,
|
|
info->scsi.irq, info->scsi.dma);
|
|
}
|
|
|
|
int fas216_print_stats(FAS216_Info *info, char *buffer)
|
|
{
|
|
char *p = buffer;
|
|
|
|
p += sprintf(p, "\n"
|
|
"Command Statistics:\n"
|
|
" Queued : %u\n"
|
|
" Issued : %u\n"
|
|
" Completed : %u\n"
|
|
" Reads : %u\n"
|
|
" Writes : %u\n"
|
|
" Others : %u\n"
|
|
" Disconnects: %u\n"
|
|
" Aborts : %u\n"
|
|
" Bus resets : %u\n"
|
|
" Host resets: %u\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);
|
|
|
|
return p - buffer;
|
|
}
|
|
|
|
int fas216_print_devices(FAS216_Info *info, char *buffer)
|
|
{
|
|
struct fas216_device *dev;
|
|
struct scsi_device *scd;
|
|
char *p = buffer;
|
|
|
|
p += sprintf(p, "Device/Lun TaggedQ Parity Sync\n");
|
|
|
|
shost_for_each_device(scd, info->host) {
|
|
dev = &info->device[scd->id];
|
|
p += sprintf(p, " %d/%d ", scd->id, scd->lun);
|
|
if (scd->tagged_supported)
|
|
p += sprintf(p, "%3sabled(%3d) ",
|
|
scd->simple_tags ? "en" : "dis",
|
|
scd->current_tag);
|
|
else
|
|
p += sprintf(p, "unsupported ");
|
|
|
|
p += sprintf(p, "%3sabled ", dev->parity_enabled ? "en" : "dis");
|
|
|
|
if (dev->sof)
|
|
p += sprintf(p, "offset %d, %d ns\n",
|
|
dev->sof, dev->period * 4);
|
|
else
|
|
p += sprintf(p, "async\n");
|
|
}
|
|
|
|
return p - buffer;
|
|
}
|
|
|
|
EXPORT_SYMBOL(fas216_init);
|
|
EXPORT_SYMBOL(fas216_add);
|
|
EXPORT_SYMBOL(fas216_queue_command);
|
|
EXPORT_SYMBOL(fas216_noqueue_command);
|
|
EXPORT_SYMBOL(fas216_intr);
|
|
EXPORT_SYMBOL(fas216_remove);
|
|
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_devices);
|
|
|
|
MODULE_AUTHOR("Russell King");
|
|
MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core");
|
|
MODULE_LICENSE("GPL");
|