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aha/drivers/scsi/dc395x.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

4969 lines
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/*
* dc395x.c
*
* Device Driver for Tekram DC395(U/UW/F), DC315(U)
* PCI SCSI Bus Master Host Adapter
* (SCSI chip set used Tekram ASIC TRM-S1040)
*
* Authors:
* C.L. Huang <ching@tekram.com.tw>
* Erich Chen <erich@tekram.com.tw>
* (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
*
* Kurt Garloff <garloff@suse.de>
* (C) 1999-2000 Kurt Garloff
*
* Oliver Neukum <oliver@neukum.name>
* Ali Akcaagac <aliakc@web.de>
* Jamie Lenehan <lenehan@twibble.org>
* (C) 2003
*
* License: GNU GPL
*
*************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/ctype.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsicam.h> /* needed for scsicam_bios_param */
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "dc395x.h"
#define DC395X_NAME "dc395x"
#define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
#define DC395X_VERSION "v2.05, 2004/03/08"
/*---------------------------------------------------------------------------
Features
---------------------------------------------------------------------------*/
/*
* Set to disable parts of the driver
*/
/*#define DC395x_NO_DISCONNECT*/
/*#define DC395x_NO_TAGQ*/
/*#define DC395x_NO_SYNC*/
/*#define DC395x_NO_WIDE*/
/*---------------------------------------------------------------------------
Debugging
---------------------------------------------------------------------------*/
/*
* Types of debugging that can be enabled and disabled
*/
#define DBG_KG 0x0001
#define DBG_0 0x0002
#define DBG_1 0x0004
#define DBG_SG 0x0020
#define DBG_FIFO 0x0040
#define DBG_PIO 0x0080
/*
* Set set of things to output debugging for.
* Undefine to remove all debugging
*/
/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
/*#define DEBUG_MASK DBG_0*/
/*
* Output a kernel mesage at the specified level and append the
* driver name and a ": " to the start of the message
*/
#define dprintkl(level, format, arg...) \
printk(level DC395X_NAME ": " format , ## arg)
#ifdef DEBUG_MASK
/*
* print a debug message - this is formated with KERN_DEBUG, then the
* driver name followed by a ": " and then the message is output.
* This also checks that the specified debug level is enabled before
* outputing the message
*/
#define dprintkdbg(type, format, arg...) \
do { \
if ((type) & (DEBUG_MASK)) \
dprintkl(KERN_DEBUG , format , ## arg); \
} while (0)
/*
* Check if the specified type of debugging is enabled
*/
#define debug_enabled(type) ((DEBUG_MASK) & (type))
#else
/*
* No debugging. Do nothing
*/
#define dprintkdbg(type, format, arg...) \
do {} while (0)
#define debug_enabled(type) (0)
#endif
#ifndef PCI_VENDOR_ID_TEKRAM
#define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */
#endif
#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
#define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */
#endif
#define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
#define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)
#define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address)))
#define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address)))
#define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address)))
#define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address))
#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))
/* cmd->result */
#define RES_TARGET 0x000000FF /* Target State */
#define RES_TARGET_LNX STATUS_MASK /* Only official ... */
#define RES_ENDMSG 0x0000FF00 /* End Message */
#define RES_DID 0x00FF0000 /* DID_ codes */
#define RES_DRV 0xFF000000 /* DRIVER_ codes */
#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)
#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }
#define TAG_NONE 255
/*
* srb->segement_x is the hw sg list. It is always allocated as a
* DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
* cross a page boundy.
*/
#define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)
struct SGentry {
u32 address; /* bus! address */
u32 length;
};
/* The SEEPROM structure for TRM_S1040 */
struct NVRamTarget {
u8 cfg0; /* Target configuration byte 0 */
u8 period; /* Target period */
u8 cfg2; /* Target configuration byte 2 */
u8 cfg3; /* Target configuration byte 3 */
};
struct NvRamType {
u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */
u8 sub_sys_id[2]; /* 2,3 Sub System ID */
u8 sub_class; /* 4 Sub Class */
u8 vendor_id[2]; /* 5,6 Vendor ID */
u8 device_id[2]; /* 7,8 Device ID */
u8 reserved; /* 9 Reserved */
struct NVRamTarget target[DC395x_MAX_SCSI_ID];
/** 10,11,12,13
** 14,15,16,17
** ....
** ....
** 70,71,72,73
*/
u8 scsi_id; /* 74 Host Adapter SCSI ID */
u8 channel_cfg; /* 75 Channel configuration */
u8 delay_time; /* 76 Power on delay time */
u8 max_tag; /* 77 Maximum tags */
u8 reserved0; /* 78 */
u8 boot_target; /* 79 */
u8 boot_lun; /* 80 */
u8 reserved1; /* 81 */
u16 reserved2[22]; /* 82,..125 */
u16 cksum; /* 126,127 */
};
struct ScsiReqBlk {
struct list_head list; /* next/prev ptrs for srb lists */
struct DeviceCtlBlk *dcb;
struct scsi_cmnd *cmd;
struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */
dma_addr_t sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */
u8 sg_count; /* No of HW sg entries for this request */
u8 sg_index; /* Index of HW sg entry for this request */
size_t total_xfer_length; /* Total number of bytes remaining to be transfered */
size_t request_length; /* Total number of bytes in this request */
/*
* The sense buffer handling function, request_sense, uses
* the first hw sg entry (segment_x[0]) and the transfer
* length (total_xfer_length). While doing this it stores the
* original values into the last sg hw list
* (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
* total_xfer_length in xferred. These values are restored in
* pci_unmap_srb_sense. This is the only place xferred is used.
*/
size_t xferred; /* Saved copy of total_xfer_length */
u16 state;
u8 msgin_buf[6];
u8 msgout_buf[6];
u8 adapter_status;
u8 target_status;
u8 msg_count;
u8 end_message;
u8 tag_number;
u8 status;
u8 retry_count;
u8 flag;
u8 scsi_phase;
};
struct DeviceCtlBlk {
struct list_head list; /* next/prev ptrs for the dcb list */
struct AdapterCtlBlk *acb;
struct list_head srb_going_list; /* head of going srb list */
struct list_head srb_waiting_list; /* head of waiting srb list */
struct ScsiReqBlk *active_srb;
u32 tag_mask;
u16 max_command;
u8 target_id; /* SCSI Target ID (SCSI Only) */
u8 target_lun; /* SCSI Log. Unit (SCSI Only) */
u8 identify_msg;
u8 dev_mode;
u8 inquiry7; /* To store Inquiry flags */
u8 sync_mode; /* 0:async mode */
u8 min_nego_period; /* for nego. */
u8 sync_period; /* for reg. */
u8 sync_offset; /* for reg. and nego.(low nibble) */
u8 flag;
u8 dev_type;
u8 init_tcq_flag;
};
struct AdapterCtlBlk {
struct Scsi_Host *scsi_host;
unsigned long io_port_base;
unsigned long io_port_len;
struct list_head dcb_list; /* head of going dcb list */
struct DeviceCtlBlk *dcb_run_robin;
struct DeviceCtlBlk *active_dcb;
struct list_head srb_free_list; /* head of free srb list */
struct ScsiReqBlk *tmp_srb;
struct timer_list waiting_timer;
struct timer_list selto_timer;
u16 srb_count;
u8 sel_timeout;
unsigned int irq_level;
u8 tag_max_num;
u8 acb_flag;
u8 gmode2;
u8 config;
u8 lun_chk;
u8 scan_devices;
u8 hostid_bit;
u8 dcb_map[DC395x_MAX_SCSI_ID];
struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];
struct pci_dev *dev;
u8 msg_len;
struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
struct ScsiReqBlk srb;
struct NvRamType eeprom; /* eeprom settings for this adapter */
};
/*---------------------------------------------------------------------------
Forward declarations
---------------------------------------------------------------------------*/
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status);
static void set_basic_config(struct AdapterCtlBlk *acb);
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb);
static void reset_scsi_bus(struct AdapterCtlBlk *acb);
static void data_io_transfer(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb, u16 io_dir);
static void disconnect(struct AdapterCtlBlk *acb);
static void reselect(struct AdapterCtlBlk *acb);
static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb);
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb);
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb);
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
struct scsi_cmnd *cmd, u8 force);
static void scsi_reset_detect(struct AdapterCtlBlk *acb);
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb);
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb);
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb);
static void set_xfer_rate(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb);
static void waiting_timeout(unsigned long ptr);
/*---------------------------------------------------------------------------
Static Data
---------------------------------------------------------------------------*/
static u16 current_sync_offset = 0;
static void *dc395x_scsi_phase0[] = {
data_out_phase0,/* phase:0 */
data_in_phase0, /* phase:1 */
command_phase0, /* phase:2 */
status_phase0, /* phase:3 */
nop0, /* phase:4 PH_BUS_FREE .. initial phase */
nop0, /* phase:5 PH_BUS_FREE .. initial phase */
msgout_phase0, /* phase:6 */
msgin_phase0, /* phase:7 */
};
static void *dc395x_scsi_phase1[] = {
data_out_phase1,/* phase:0 */
data_in_phase1, /* phase:1 */
command_phase1, /* phase:2 */
status_phase1, /* phase:3 */
nop1, /* phase:4 PH_BUS_FREE .. initial phase */
nop1, /* phase:5 PH_BUS_FREE .. initial phase */
msgout_phase1, /* phase:6 */
msgin_phase1, /* phase:7 */
};
/*
*Fast20: 000 50ns, 20.0 MHz
* 001 75ns, 13.3 MHz
* 010 100ns, 10.0 MHz
* 011 125ns, 8.0 MHz
* 100 150ns, 6.6 MHz
* 101 175ns, 5.7 MHz
* 110 200ns, 5.0 MHz
* 111 250ns, 4.0 MHz
*
*Fast40(LVDS): 000 25ns, 40.0 MHz
* 001 50ns, 20.0 MHz
* 010 75ns, 13.3 MHz
* 011 100ns, 10.0 MHz
* 100 125ns, 8.0 MHz
* 101 150ns, 6.6 MHz
* 110 175ns, 5.7 MHz
* 111 200ns, 5.0 MHz
*/
/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/
/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };
/*---------------------------------------------------------------------------
Configuration
---------------------------------------------------------------------------*/
/*
* Module/boot parameters currently effect *all* instances of the
* card in the system.
*/
/*
* Command line parameters are stored in a structure below.
* These are the index's into the structure for the various
* command line options.
*/
#define CFG_ADAPTER_ID 0
#define CFG_MAX_SPEED 1
#define CFG_DEV_MODE 2
#define CFG_ADAPTER_MODE 3
#define CFG_TAGS 4
#define CFG_RESET_DELAY 5
#define CFG_NUM 6 /* number of configuration items */
/*
* Value used to indicate that a command line override
* hasn't been used to modify the value.
*/
#define CFG_PARAM_UNSET -1
/*
* Hold command line parameters.
*/
struct ParameterData {
int value; /* value of this setting */
int min; /* minimum value */
int max; /* maximum value */
int def; /* default value */
int safe; /* safe value */
};
static struct ParameterData __devinitdata cfg_data[] = {
{ /* adapter id */
CFG_PARAM_UNSET,
0,
15,
7,
7
},
{ /* max speed */
CFG_PARAM_UNSET,
0,
7,
1, /* 13.3Mhz */
4, /* 6.7Hmz */
},
{ /* dev mode */
CFG_PARAM_UNSET,
0,
0x3f,
NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
NTC_DO_SEND_START,
NTC_DO_PARITY_CHK | NTC_DO_SEND_START
},
{ /* adapter mode */
CFG_PARAM_UNSET,
0,
0x2f,
#ifdef CONFIG_SCSI_MULTI_LUN
NAC_SCANLUN |
#endif
NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
/*| NAC_ACTIVE_NEG*/,
NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
},
{ /* tags */
CFG_PARAM_UNSET,
0,
5,
3, /* 16 tags (??) */
2,
},
{ /* reset delay */
CFG_PARAM_UNSET,
0,
180,
1, /* 1 second */
10, /* 10 seconds */
}
};
/*
* Safe settings. If set to zero the the BIOS/default values with
* command line overrides will be used. If set to 1 then safe and
* slow settings will be used.
*/
static int use_safe_settings = 0;
module_param_named(safe, use_safe_settings, bool, 0);
MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");
module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");
module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");
module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
MODULE_PARM_DESC(dev_mode, "Device mode.");
module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
MODULE_PARM_DESC(adapter_mode, "Adapter mode.");
module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");
module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");
/**
* set_safe_settings - if the use_safe_settings option is set then
* set all values to the safe and slow values.
**/
static void __devinit set_safe_settings(void)
{
if (use_safe_settings)
{
int i;
dprintkl(KERN_INFO, "Using safe settings.\n");
for (i = 0; i < CFG_NUM; i++)
{
cfg_data[i].value = cfg_data[i].safe;
}
}
}
/**
* fix_settings - reset any boot parameters which are out of range
* back to the default values.
**/
static void __devinit fix_settings(void)
{
int i;
dprintkdbg(DBG_1,
"setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
"AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
cfg_data[CFG_ADAPTER_ID].value,
cfg_data[CFG_MAX_SPEED].value,
cfg_data[CFG_DEV_MODE].value,
cfg_data[CFG_ADAPTER_MODE].value,
cfg_data[CFG_TAGS].value,
cfg_data[CFG_RESET_DELAY].value);
for (i = 0; i < CFG_NUM; i++)
{
if (cfg_data[i].value < cfg_data[i].min
|| cfg_data[i].value > cfg_data[i].max)
cfg_data[i].value = cfg_data[i].def;
}
}
/*
* Mapping from the eeprom delay index value (index into this array)
* to the the number of actual seconds that the delay should be for.
*/
static char __devinitdata eeprom_index_to_delay_map[] =
{ 1, 3, 5, 10, 16, 30, 60, 120 };
/**
* eeprom_index_to_delay - Take the eeprom delay setting and convert it
* into a number of seconds.
*
* @eeprom: The eeprom structure in which we find the delay index to map.
**/
static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
{
eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
}
/**
* delay_to_eeprom_index - Take a delay in seconds and return the
* closest eeprom index which will delay for at least that amount of
* seconds.
*
* @delay: The delay, in seconds, to find the eeprom index for.
**/
static int __devinit delay_to_eeprom_index(int delay)
{
u8 idx = 0;
while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
idx++;
return idx;
}
/**
* eeprom_override - Override the eeprom settings, in the provided
* eeprom structure, with values that have been set on the command
* line.
*
* @eeprom: The eeprom data to override with command line options.
**/
static void __devinit eeprom_override(struct NvRamType *eeprom)
{
u8 id;
/* Adapter Settings */
if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;
if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;
if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
eeprom->delay_time = delay_to_eeprom_index(
cfg_data[CFG_RESET_DELAY].value);
if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;
/* Device Settings */
for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
eeprom->target[id].cfg0 =
(u8)cfg_data[CFG_DEV_MODE].value;
if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
eeprom->target[id].period =
(u8)cfg_data[CFG_MAX_SPEED].value;
}
}
/*---------------------------------------------------------------------------
---------------------------------------------------------------------------*/
static unsigned int list_size(struct list_head *head)
{
unsigned int count = 0;
struct list_head *pos;
list_for_each(pos, head)
count++;
return count;
}
static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
struct DeviceCtlBlk *pos)
{
int use_next = 0;
struct DeviceCtlBlk* next = NULL;
struct DeviceCtlBlk* i;
if (list_empty(head))
return NULL;
/* find supplied dcb and then select the next one */
list_for_each_entry(i, head, list)
if (use_next) {
next = i;
break;
} else if (i == pos) {
use_next = 1;
}
/* if no next one take the head one (ie, wraparound) */
if (!next)
list_for_each_entry(i, head, list) {
next = i;
break;
}
return next;
}
static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
if (srb->tag_number < 255) {
dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
srb->tag_number = 255;
}
}
/* Find cmd in SRB list */
static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
struct list_head *head)
{
struct ScsiReqBlk *i;
list_for_each_entry(i, head, list)
if (i->cmd == cmd)
return i;
return NULL;
}
static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
{
struct list_head *head = &acb->srb_free_list;
struct ScsiReqBlk *srb = NULL;
if (!list_empty(head)) {
srb = list_entry(head->next, struct ScsiReqBlk, list);
list_del(head->next);
dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
}
return srb;
}
static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
list_add_tail(&srb->list, &acb->srb_free_list);
}
static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_add(&srb->list, &dcb->srb_waiting_list);
}
static void srb_waiting_append(struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_add_tail(&srb->list, &dcb->srb_waiting_list);
}
static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_add_tail(&srb->list, &dcb->srb_going_list);
}
static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
struct ScsiReqBlk *i;
struct ScsiReqBlk *tmp;
dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
if (i == srb) {
list_del(&srb->list);
break;
}
}
static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
struct ScsiReqBlk *i;
struct ScsiReqBlk *tmp;
dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
if (i == srb) {
list_del(&srb->list);
break;
}
}
static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0,
"srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_move(&srb->list, &dcb->srb_waiting_list);
}
static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
dprintkdbg(DBG_0,
"srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
list_move(&srb->list, &dcb->srb_going_list);
}
/* Sets the timer to wake us up */
static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
{
if (timer_pending(&acb->waiting_timer))
return;
init_timer(&acb->waiting_timer);
acb->waiting_timer.function = waiting_timeout;
acb->waiting_timer.data = (unsigned long) acb;
if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
acb->waiting_timer.expires =
acb->scsi_host->last_reset - HZ / 2 + 1;
else
acb->waiting_timer.expires = jiffies + to + 1;
add_timer(&acb->waiting_timer);
}
/* Send the next command from the waiting list to the bus */
static void waiting_process_next(struct AdapterCtlBlk *acb)
{
struct DeviceCtlBlk *start = NULL;
struct DeviceCtlBlk *pos;
struct DeviceCtlBlk *dcb;
struct ScsiReqBlk *srb;
struct list_head *dcb_list_head = &acb->dcb_list;
if (acb->active_dcb
|| (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
return;
if (timer_pending(&acb->waiting_timer))
del_timer(&acb->waiting_timer);
if (list_empty(dcb_list_head))
return;
/*
* Find the starting dcb. Need to find it again in the list
* since the list may have changed since we set the ptr to it
*/
list_for_each_entry(dcb, dcb_list_head, list)
if (dcb == acb->dcb_run_robin) {
start = dcb;
break;
}
if (!start) {
/* This can happen! */
start = list_entry(dcb_list_head->next, typeof(*start), list);
acb->dcb_run_robin = start;
}
/*
* Loop over the dcb, but we start somewhere (potentially) in
* the middle of the loop so we need to manully do this.
*/
pos = start;
do {
struct list_head *waiting_list_head = &pos->srb_waiting_list;
/* Make sure, the next another device gets scheduled ... */
acb->dcb_run_robin = dcb_get_next(dcb_list_head,
acb->dcb_run_robin);
if (list_empty(waiting_list_head) ||
pos->max_command <= list_size(&pos->srb_going_list)) {
/* move to next dcb */
pos = dcb_get_next(dcb_list_head, pos);
} else {
srb = list_entry(waiting_list_head->next,
struct ScsiReqBlk, list);
/* Try to send to the bus */
if (!start_scsi(acb, pos, srb))
srb_waiting_to_going_move(pos, srb);
else
waiting_set_timer(acb, HZ/50);
break;
}
} while (pos != start);
}
/* Wake up waiting queue */
static void waiting_timeout(unsigned long ptr)
{
unsigned long flags;
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
dprintkdbg(DBG_1,
"waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
DC395x_LOCK_IO(acb->scsi_host, flags);
waiting_process_next(acb);
DC395x_UNLOCK_IO(acb->scsi_host, flags);
}
/* Get the DCB for a given ID/LUN combination */
static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
{
return acb->children[id][lun];
}
/* Send SCSI Request Block (srb) to adapter (acb) */
static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
struct DeviceCtlBlk *dcb = srb->dcb;
if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
acb->active_dcb ||
(acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
srb_waiting_append(dcb, srb);
waiting_process_next(acb);
return;
}
if (!start_scsi(acb, dcb, srb))
srb_going_append(dcb, srb);
else {
srb_waiting_insert(dcb, srb);
waiting_set_timer(acb, HZ / 50);
}
}
/* Prepare SRB for being sent to Device DCB w/ command *cmd */
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
enum dma_data_direction dir = cmd->sc_data_direction;
dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
cmd->pid, dcb->target_id, dcb->target_lun);
srb->dcb = dcb;
srb->cmd = cmd;
srb->sg_count = 0;
srb->total_xfer_length = 0;
srb->sg_bus_addr = 0;
srb->sg_index = 0;
srb->adapter_status = 0;
srb->target_status = 0;
srb->msg_count = 0;
srb->status = 0;
srb->flag = 0;
srb->state = 0;
srb->retry_count = 0;
srb->tag_number = TAG_NONE;
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
srb->end_message = 0;
if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
dprintkdbg(DBG_0,
"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
cmd->bufflen, cmd->request_buffer,
cmd->use_sg, srb->segment_x[0].address);
} else if (cmd->use_sg) {
int i;
u32 reqlen = cmd->request_bufflen;
struct scatterlist *sl = (struct scatterlist *)
cmd->request_buffer;
struct SGentry *sgp = srb->segment_x;
srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
dir);
dprintkdbg(DBG_0,
"build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
reqlen, cmd->request_buffer, cmd->use_sg,
srb->sg_count);
for (i = 0; i < srb->sg_count; i++) {
u32 busaddr = (u32)sg_dma_address(&sl[i]);
u32 seglen = (u32)sl[i].length;
sgp[i].address = busaddr;
sgp[i].length = seglen;
srb->total_xfer_length += seglen;
}
sgp += srb->sg_count - 1;
/*
* adjust last page if too big as it is allocated
* on even page boundaries
*/
if (srb->total_xfer_length > reqlen) {
sgp->length -= (srb->total_xfer_length - reqlen);
srb->total_xfer_length = reqlen;
}
/* Fixup for WIDE padding - make sure length is even */
if (dcb->sync_period & WIDE_SYNC &&
srb->total_xfer_length % 2) {
srb->total_xfer_length++;
sgp->length++;
}
srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
srb->segment_x,
SEGMENTX_LEN,
PCI_DMA_TODEVICE);
dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
} else {
srb->total_xfer_length = cmd->request_bufflen;
srb->sg_count = 1;
srb->segment_x[0].address =
pci_map_single(dcb->acb->dev, cmd->request_buffer,
srb->total_xfer_length, dir);
/* Fixup for WIDE padding - make sure length is even */
if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
srb->total_xfer_length++;
srb->segment_x[0].length = srb->total_xfer_length;
dprintkdbg(DBG_0,
"build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
srb->total_xfer_length, cmd->request_buffer,
cmd->use_sg, srb->segment_x[0].address);
}
srb->request_length = srb->total_xfer_length;
}
/**
* dc395x_queue_command - queue scsi command passed from the mid
* layer, invoke 'done' on completion
*
* @cmd: pointer to scsi command object
* @done: function pointer to be invoked on completion
*
* Returns 1 if the adapter (host) is busy, else returns 0. One
* reason for an adapter to be busy is that the number
* of outstanding queued commands is already equal to
* struct Scsi_Host::can_queue .
*
* Required: if struct Scsi_Host::can_queue is ever non-zero
* then this function is required.
*
* Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
* and is expected to be held on return.
*
**/
static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
struct DeviceCtlBlk *dcb;
struct ScsiReqBlk *srb;
struct AdapterCtlBlk *acb =
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
/* Assume BAD_TARGET; will be cleared later */
cmd->result = DID_BAD_TARGET << 16;
/* ignore invalid targets */
if (cmd->device->id >= acb->scsi_host->max_id ||
cmd->device->lun >= acb->scsi_host->max_lun ||
cmd->device->lun >31) {
goto complete;
}
/* does the specified lun on the specified device exist */
if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
cmd->device->id, cmd->device->lun);
goto complete;
}
/* do we have a DCB for the device */
dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
if (!dcb) {
/* should never happen */
dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
cmd->device->id, cmd->device->lun);
goto complete;
}
/* set callback and clear result in the command */
cmd->scsi_done = done;
cmd->result = 0;
srb = srb_get_free(acb);
if (!srb)
{
/*
* Return 1 since we are unable to queue this command at this
* point in time.
*/
dprintkdbg(DBG_0, "queue_command: No free srb's\n");
return 1;
}
build_srb(cmd, dcb, srb);
if (!list_empty(&dcb->srb_waiting_list)) {
/* append to waiting queue */
srb_waiting_append(dcb, srb);
waiting_process_next(acb);
} else {
/* process immediately */
send_srb(acb, srb);
}
dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
return 0;
complete:
/*
* Complete the command immediatey, and then return 0 to
* indicate that we have handled the command. This is usually
* done when the commad is for things like non existent
* devices.
*/
done(cmd);
return 0;
}
/*
* Return the disk geometry for the given SCSI device.
*/
static int dc395x_bios_param(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity, int *info)
{
#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
int heads, sectors, cylinders;
struct AdapterCtlBlk *acb;
int size = capacity;
dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
heads = 64;
sectors = 32;
cylinders = size / (heads * sectors);
if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
heads = 255;
sectors = 63;
cylinders = size / (heads * sectors);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return 0;
#else
return scsicam_bios_param(bdev, capacity, info);
#endif
}
static void dump_register_info(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
u16 pstat;
struct pci_dev *dev = acb->dev;
pci_read_config_word(dev, PCI_STATUS, &pstat);
if (!dcb)
dcb = acb->active_dcb;
if (!srb && dcb)
srb = dcb->active_srb;
if (srb) {
if (!srb->cmd)
dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
srb, srb->cmd);
else
dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
"cmnd=0x%02x <%02i-%i>\n",
srb, srb->cmd, srb->cmd->pid,
srb->cmd->cmnd[0], srb->cmd->device->id,
srb->cmd->device->lun);
printk(" sglist=%p cnt=%i idx=%i len=%Zd\n",
srb->segment_x, srb->sg_count, srb->sg_index,
srb->total_xfer_length);
printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
srb->state, srb->status, srb->scsi_phase,
(acb->active_dcb) ? "" : "not");
}
dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
"signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
"rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
"config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
"irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
"ctctr=0x%08x addr=0x%08x:0x%08x}\n",
DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
DC395x_read8(acb, TRM_S1040_DMA_STATUS),
DC395x_read8(acb, TRM_S1040_DMA_INTEN),
DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
DC395x_read32(acb, TRM_S1040_DMA_XCNT),
DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
"pci{status=0x%04x}\n",
DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
DC395x_read8(acb, TRM_S1040_GEN_STATUS),
DC395x_read8(acb, TRM_S1040_GEN_TIMER),
pstat);
}
static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
{
#if debug_enabled(DBG_FIFO)
u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
if (!(fifocnt & 0x40))
dprintkdbg(DBG_FIFO,
"clear_fifo: (%i bytes) on phase %02x in %s\n",
fifocnt & 0x3f, lines, txt);
#endif
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
}
static void reset_dev_param(struct AdapterCtlBlk *acb)
{
struct DeviceCtlBlk *dcb;
struct NvRamType *eeprom = &acb->eeprom;
dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);
list_for_each_entry(dcb, &acb->dcb_list, list) {
u8 period_index;
dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
dcb->sync_period = 0;
dcb->sync_offset = 0;
dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
period_index = eeprom->target[dcb->target_id].period & 0x07;
dcb->min_nego_period = clock_period[period_index];
if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
|| !(acb->config & HCC_WIDE_CARD))
dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
}
}
/*
* perform a hard reset on the SCSI bus
* @cmd - some command for this host (for fetching hooks)
* Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
*/
static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
struct AdapterCtlBlk *acb =
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
dprintkl(KERN_INFO,
"eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
cmd->pid, cmd->device->id, cmd->device->lun, cmd);
if (timer_pending(&acb->waiting_timer))
del_timer(&acb->waiting_timer);
/*
* disable interrupt
*/
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
reset_scsi_bus(acb);
udelay(500);
/* We may be in serious trouble. Wait some seconds */
acb->scsi_host->last_reset =
jiffies + 3 * HZ / 2 +
HZ * acb->eeprom.delay_time;
/*
* re-enable interrupt
*/
/* Clear SCSI FIFO */
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
clear_fifo(acb, "eh_bus_reset");
/* Delete pending IRQ */
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
set_basic_config(acb);
reset_dev_param(acb);
doing_srb_done(acb, DID_RESET, cmd, 0);
acb->active_dcb = NULL;
acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */
waiting_process_next(acb);
return SUCCESS;
}
static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
int rc;
spin_lock_irq(cmd->device->host->host_lock);
rc = __dc395x_eh_bus_reset(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return rc;
}
/*
* abort an errant SCSI command
* @cmd - command to be aborted
* Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
*/
static int dc395x_eh_abort(struct scsi_cmnd *cmd)
{
/*
* Look into our command queues: If it has not been sent already,
* we remove it and return success. Otherwise fail.
*/
struct AdapterCtlBlk *acb =
(struct AdapterCtlBlk *)cmd->device->host->hostdata;
struct DeviceCtlBlk *dcb;
struct ScsiReqBlk *srb;
dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
cmd->pid, cmd->device->id, cmd->device->lun, cmd);
dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
if (!dcb) {
dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
return FAILED;
}
srb = find_cmd(cmd, &dcb->srb_waiting_list);
if (srb) {
srb_waiting_remove(dcb, srb);
pci_unmap_srb_sense(acb, srb);
pci_unmap_srb(acb, srb);
free_tag(dcb, srb);
srb_free_insert(acb, srb);
dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
cmd->result = DID_ABORT << 16;
return SUCCESS;
}
srb = find_cmd(cmd, &dcb->srb_going_list);
if (srb) {
dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
/* XXX: Should abort the command here */
} else {
dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
}
return FAILED;
}
/* SDTR */
static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
u8 *ptr = srb->msgout_buf + srb->msg_count;
if (srb->msg_count > 1) {
dprintkl(KERN_INFO,
"build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
srb->msg_count, srb->msgout_buf[0],
srb->msgout_buf[1]);
return;
}
if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
dcb->sync_offset = 0;
dcb->min_nego_period = 200 >> 2;
} else if (dcb->sync_offset == 0)
dcb->sync_offset = SYNC_NEGO_OFFSET;
*ptr++ = MSG_EXTENDED; /* (01h) */
*ptr++ = 3; /* length */
*ptr++ = EXTENDED_SDTR; /* (01h) */
*ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */
*ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */
srb->msg_count += 5;
srb->state |= SRB_DO_SYNC_NEGO;
}
/* WDTR */
static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
(acb->config & HCC_WIDE_CARD)) ? 1 : 0;
u8 *ptr = srb->msgout_buf + srb->msg_count;
if (srb->msg_count > 1) {
dprintkl(KERN_INFO,
"build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
srb->msg_count, srb->msgout_buf[0],
srb->msgout_buf[1]);
return;
}
*ptr++ = MSG_EXTENDED; /* (01h) */
*ptr++ = 2; /* length */
*ptr++ = EXTENDED_WDTR; /* (03h) */
*ptr++ = wide;
srb->msg_count += 4;
srb->state |= SRB_DO_WIDE_NEGO;
}
#if 0
/* Timer to work around chip flaw: When selecting and the bus is
* busy, we sometimes miss a Selection timeout IRQ */
void selection_timeout_missed(unsigned long ptr);
/* Sets the timer to wake us up */
static void selto_timer(struct AdapterCtlBlk *acb)
{
if (timer_pending(&acb->selto_timer))
return;
acb->selto_timer.function = selection_timeout_missed;
acb->selto_timer.data = (unsigned long) acb;
if (time_before
(jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
acb->selto_timer.expires =
acb->scsi_host->last_reset + HZ / 2 + 1;
else
acb->selto_timer.expires = jiffies + HZ + 1;
add_timer(&acb->selto_timer);
}
void selection_timeout_missed(unsigned long ptr)
{
unsigned long flags;
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
struct ScsiReqBlk *srb;
dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
if (!acb->active_dcb || !acb->active_dcb->active_srb) {
dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
return;
}
DC395x_LOCK_IO(acb->scsi_host, flags);
srb = acb->active_dcb->active_srb;
disconnect(acb);
DC395x_UNLOCK_IO(acb->scsi_host, flags);
}
#endif
static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
struct ScsiReqBlk* srb)
{
u16 s_stat2, return_code;
u8 s_stat, scsicommand, i, identify_message;
u8 *ptr;
dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */
s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
s_stat2 = 0;
s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
#if 1
if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
srb->cmd->pid, s_stat, s_stat2);
/*
* Try anyway?
*
* We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
* Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
* (This is likely to be a bug in the hardware. Obviously, most people
* only have one initiator per SCSI bus.)
* Instead let this fail and have the timer make sure the command is
* tried again after a short time
*/
/*selto_timer (acb); */
return 1;
}
#endif
if (acb->active_dcb) {
dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
"command while another command (pid#%li) is active.",
srb->cmd->pid,
acb->active_dcb->active_srb ?
acb->active_dcb->active_srb->cmd->pid : 0);
return 1;
}
if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
srb->cmd->pid);
return 1;
}
/* Allow starting of SCSI commands half a second before we allow the mid-level
* to queue them again after a reset */
if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
return 1;
}
/* Flush FIFO */
clear_fifo(acb, "start_scsi");
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
identify_message = dcb->identify_msg;
/*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
/* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
if (srb->flag & AUTO_REQSENSE)
identify_message &= 0xBF;
if (((srb->cmd->cmnd[0] == INQUIRY)
|| (srb->cmd->cmnd[0] == REQUEST_SENSE)
|| (srb->flag & AUTO_REQSENSE))
&& (((dcb->sync_mode & WIDE_NEGO_ENABLE)
&& !(dcb->sync_mode & WIDE_NEGO_DONE))
|| ((dcb->sync_mode & SYNC_NEGO_ENABLE)
&& !(dcb->sync_mode & SYNC_NEGO_DONE)))
&& (dcb->target_lun == 0)) {
srb->msgout_buf[0] = identify_message;
srb->msg_count = 1;
scsicommand = SCMD_SEL_ATNSTOP;
srb->state = SRB_MSGOUT;
#ifndef SYNC_FIRST
if (dcb->sync_mode & WIDE_NEGO_ENABLE
&& dcb->inquiry7 & SCSI_INQ_WBUS16) {
build_wdtr(acb, dcb, srb);
goto no_cmd;
}
#endif
if (dcb->sync_mode & SYNC_NEGO_ENABLE
&& dcb->inquiry7 & SCSI_INQ_SYNC) {
build_sdtr(acb, dcb, srb);
goto no_cmd;
}
if (dcb->sync_mode & WIDE_NEGO_ENABLE
&& dcb->inquiry7 & SCSI_INQ_WBUS16) {
build_wdtr(acb, dcb, srb);
goto no_cmd;
}
srb->msg_count = 0;
}
/* Send identify message */
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);
scsicommand = SCMD_SEL_ATN;
srb->state = SRB_START_;
#ifndef DC395x_NO_TAGQ
if ((dcb->sync_mode & EN_TAG_QUEUEING)
&& (identify_message & 0xC0)) {
/* Send Tag message */
u32 tag_mask = 1;
u8 tag_number = 0;
while (tag_mask & dcb->tag_mask
&& tag_number <= dcb->max_command) {
tag_mask = tag_mask << 1;
tag_number++;
}
if (tag_number >= dcb->max_command) {
dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
"Out of tags target=<%02i-%i>)\n",
srb->cmd->pid, srb->cmd->device->id,
srb->cmd->device->lun);
srb->state = SRB_READY;
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
DO_HWRESELECT);
return 1;
}
/* Send Tag id */
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
dcb->tag_mask |= tag_mask;
srb->tag_number = tag_number;
scsicommand = SCMD_SEL_ATN3;
srb->state = SRB_START_;
}
#endif
/*polling:*/
/* Send CDB ..command block ......... */
dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
srb->cmd->cmnd[0], srb->tag_number);
if (srb->flag & AUTO_REQSENSE) {
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
sizeof(srb->cmd->sense_buffer));
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
} else {
ptr = (u8 *)srb->cmd->cmnd;
for (i = 0; i < srb->cmd->cmd_len; i++)
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
}
no_cmd:
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
DO_HWRESELECT | DO_DATALATCH);
if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
/*
* If start_scsi return 1:
* we caught an interrupt (must be reset or reselection ... )
* : Let's process it first!
*/
dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun);
srb->state = SRB_READY;
free_tag(dcb, srb);
srb->msg_count = 0;
return_code = 1;
/* This IRQ should NOT get lost, as we did not acknowledge it */
} else {
/*
* If start_scsi returns 0:
* we know that the SCSI processor is free
*/
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
dcb->active_srb = srb;
acb->active_dcb = dcb;
return_code = 0;
/* it's important for atn stop */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
DO_DATALATCH | DO_HWRESELECT);
/* SCSI command */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
}
return return_code;
}
#define DC395x_ENABLE_MSGOUT \
DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
srb->state |= SRB_MSGOUT
/* abort command */
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb)
{
srb->msgout_buf[0] = ABORT;
srb->msg_count = 1;
DC395x_ENABLE_MSGOUT;
srb->state &= ~SRB_MSGIN;
srb->state |= SRB_MSGOUT;
}
/**
* dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
* have been triggered for this card.
*
* @acb: a pointer to the adpter control block
* @scsi_status: the status return when we checked the card
**/
static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
u16 scsi_status)
{
struct DeviceCtlBlk *dcb;
struct ScsiReqBlk *srb;
u16 phase;
u8 scsi_intstatus;
unsigned long flags;
void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *,
u16 *);
DC395x_LOCK_IO(acb->scsi_host, flags);
/* This acknowledges the IRQ */
scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
if ((scsi_status & 0x2007) == 0x2002)
dprintkl(KERN_DEBUG,
"COP after COP completed? %04x\n", scsi_status);
if (debug_enabled(DBG_KG)) {
if (scsi_intstatus & INT_SELTIMEOUT)
dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
}
/*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */
if (timer_pending(&acb->selto_timer))
del_timer(&acb->selto_timer);
if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
disconnect(acb); /* bus free interrupt */
goto out_unlock;
}
if (scsi_intstatus & INT_RESELECTED) {
reselect(acb);
goto out_unlock;
}
if (scsi_intstatus & INT_SELECT) {
dprintkl(KERN_INFO, "Host does not support target mode!\n");
goto out_unlock;
}
if (scsi_intstatus & INT_SCSIRESET) {
scsi_reset_detect(acb);
goto out_unlock;
}
if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
dcb = acb->active_dcb;
if (!dcb) {
dprintkl(KERN_DEBUG,
"Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
scsi_status, scsi_intstatus);
goto out_unlock;
}
srb = dcb->active_srb;
if (dcb->flag & ABORT_DEV_) {
dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
enable_msgout_abort(acb, srb);
}
/* software sequential machine */
phase = (u16)srb->scsi_phase;
/*
* 62037 or 62137
* call dc395x_scsi_phase0[]... "phase entry"
* handle every phase before start transfer
*/
/* data_out_phase0, phase:0 */
/* data_in_phase0, phase:1 */
/* command_phase0, phase:2 */
/* status_phase0, phase:3 */
/* nop0, phase:4 PH_BUS_FREE .. initial phase */
/* nop0, phase:5 PH_BUS_FREE .. initial phase */
/* msgout_phase0, phase:6 */
/* msgin_phase0, phase:7 */
dc395x_statev = dc395x_scsi_phase0[phase];
dc395x_statev(acb, srb, &scsi_status);
/*
* if there were any exception occured scsi_status
* will be modify to bus free phase new scsi_status
* transfer out from ... previous dc395x_statev
*/
srb->scsi_phase = scsi_status & PHASEMASK;
phase = (u16)scsi_status & PHASEMASK;
/*
* call dc395x_scsi_phase1[]... "phase entry" handle
* every phase to do transfer
*/
/* data_out_phase1, phase:0 */
/* data_in_phase1, phase:1 */
/* command_phase1, phase:2 */
/* status_phase1, phase:3 */
/* nop1, phase:4 PH_BUS_FREE .. initial phase */
/* nop1, phase:5 PH_BUS_FREE .. initial phase */
/* msgout_phase1, phase:6 */
/* msgin_phase1, phase:7 */
dc395x_statev = dc395x_scsi_phase1[phase];
dc395x_statev(acb, srb, &scsi_status);
}
out_unlock:
DC395x_UNLOCK_IO(acb->scsi_host, flags);
}
static irqreturn_t dc395x_interrupt(int irq, void *dev_id)
{
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id;
u16 scsi_status;
u8 dma_status;
irqreturn_t handled = IRQ_NONE;
/*
* Check for pending interupt
*/
scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
if (scsi_status & SCSIINTERRUPT) {
/* interupt pending - let's process it! */
dc395x_handle_interrupt(acb, scsi_status);
handled = IRQ_HANDLED;
}
else if (dma_status & 0x20) {
/* Error from the DMA engine */
dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
#if 0
dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
if (acb->active_dcb) {
acb->active_dcb-> flag |= ABORT_DEV_;
if (acb->active_dcb->active_srb)
enable_msgout_abort(acb, acb->active_dcb->active_srb);
}
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
#else
dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
acb = NULL;
#endif
handled = IRQ_HANDLED;
}
return handled;
}
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
*pscsi_status = PH_BUS_FREE; /*.. initial phase */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
srb->state &= ~SRB_MSGOUT;
}
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
u16 i;
u8 *ptr;
dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);
clear_fifo(acb, "msgout_phase1");
if (!(srb->state & SRB_MSGOUT)) {
srb->state |= SRB_MSGOUT;
dprintkl(KERN_DEBUG,
"msgout_phase1: (pid#%li) Phase unexpected\n",
srb->cmd->pid); /* So what ? */
}
if (!srb->msg_count) {
dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
srb->cmd->pid);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
return;
}
ptr = (u8 *)srb->msgout_buf;
for (i = 0; i < srb->msg_count; i++)
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
srb->msg_count = 0;
if (srb->msgout_buf[0] == MSG_ABORT)
srb->state = SRB_ABORT_SENT;
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
struct DeviceCtlBlk *dcb;
u8 *ptr;
u16 i;
dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);
clear_fifo(acb, "command_phase1");
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
if (!(srb->flag & AUTO_REQSENSE)) {
ptr = (u8 *)srb->cmd->cmnd;
for (i = 0; i < srb->cmd->cmd_len; i++) {
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
ptr++;
}
} else {
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
dcb = acb->active_dcb;
/* target id */
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
sizeof(srb->cmd->sense_buffer));
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
}
srb->state |= SRB_COMMAND;
/* it's important for atn stop */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
/* SCSI command */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}
/*
* Verify that the remaining space in the hw sg lists is the same as
* the count of remaining bytes in srb->total_xfer_length
*/
static void sg_verify_length(struct ScsiReqBlk *srb)
{
if (debug_enabled(DBG_SG)) {
unsigned len = 0;
unsigned idx = srb->sg_index;
struct SGentry *psge = srb->segment_x + idx;
for (; idx < srb->sg_count; psge++, idx++)
len += psge->length;
if (len != srb->total_xfer_length)
dprintkdbg(DBG_SG,
"Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
srb->total_xfer_length, len);
}
}
/*
* Compute the next Scatter Gather list index and adjust its length
* and address if necessary
*/
static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
{
u8 idx;
u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
struct SGentry *psge = srb->segment_x + srb->sg_index;
dprintkdbg(DBG_0,
"sg_update_list: Transfered %i of %i bytes, %i remain\n",
xferred, srb->total_xfer_length, left);
if (xferred == 0) {
/* nothing to update since we did not transfer any data */
return;
}
sg_verify_length(srb);
srb->total_xfer_length = left; /* update remaining count */
for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
if (xferred >= psge->length) {
/* Complete SG entries done */
xferred -= psge->length;
} else {
/* Partial SG entry done */
psge->length -= xferred;
psge->address += xferred;
srb->sg_index = idx;
pci_dma_sync_single_for_device(srb->dcb->
acb->dev,
srb->sg_bus_addr,
SEGMENTX_LEN,
PCI_DMA_TODEVICE);
break;
}
psge++;
}
sg_verify_length(srb);
}
/*
* We have transfered a single byte (PIO mode?) and need to update
* the count of bytes remaining (total_xfer_length) and update the sg
* entry to either point to next byte in the current sg entry, or of
* already at the end to point to the start of the next sg entry
*/
static void sg_subtract_one(struct ScsiReqBlk *srb)
{
sg_update_list(srb, srb->total_xfer_length - 1);
}
/*
* cleanup_after_transfer
*
* Makes sure, DMA and SCSI engine are empty, after the transfer has finished
* KG: Currently called from StatusPhase1 ()
* Should probably also be called from other places
* Best might be to call it in DataXXPhase0, if new phase will differ
*/
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb)
{
/*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */
if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
clear_fifo(acb, "cleanup/in");
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
} else { /* write */
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
clear_fifo(acb, "cleanup/out");
}
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}
/*
* Those no of bytes will be transfered w/ PIO through the SCSI FIFO
* Seems to be needed for unknown reasons; could be a hardware bug :-(
*/
#define DC395x_LASTPIO 4
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
struct DeviceCtlBlk *dcb = srb->dcb;
u16 scsi_status = *pscsi_status;
u32 d_left_counter = 0;
dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
/*
* KG: We need to drain the buffers before we draw any conclusions!
* This means telling the DMA to push the rest into SCSI, telling
* SCSI to push the rest to the bus.
* However, the device might have been the one to stop us (phase
* change), and the data in transit just needs to be accounted so
* it can be retransmitted.)
*/
/*
* KG: Stop DMA engine pushing more data into the SCSI FIFO
* If we need more data, the DMA SG list will be freshly set up, anyway
*/
dprintkdbg(DBG_PIO, "data_out_phase0: "
"DMA{fifocnt=0x%02x fifostat=0x%02x} "
"SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
srb->total_xfer_length);
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);
if (!(srb->state & SRB_XFERPAD)) {
if (scsi_status & PARITYERROR)
srb->status |= PARITY_ERROR;
/*
* KG: Right, we can't just rely on the SCSI_COUNTER, because this
* is the no of bytes it got from the DMA engine not the no it
* transferred successfully to the device. (And the difference could
* be as much as the FIFO size, I guess ...)
*/
if (!(scsi_status & SCSIXFERDONE)) {
/*
* when data transfer from DMA FIFO to SCSI FIFO
* if there was some data left in SCSI FIFO
*/
d_left_counter =
(u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
0x1F);
if (dcb->sync_period & WIDE_SYNC)
d_left_counter <<= 1;
dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
"SCSI{fifocnt=0x%02x cnt=0x%08x} "
"DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
(dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
}
/*
* calculate all the residue data that not yet tranfered
* SCSI transfer counter + left in SCSI FIFO data
*
* .....TRM_S1040_SCSI_COUNTER (24bits)
* The counter always decrement by one for every SCSI byte transfer.
* .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
* The counter is SCSI FIFO offset counter (in units of bytes or! words)
*/
if (srb->total_xfer_length > DC395x_LASTPIO)
d_left_counter +=
DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
/* Is this a good idea? */
/*clear_fifo(acb, "DOP1"); */
/* KG: What is this supposed to be useful for? WIDE padding stuff? */
if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
&& srb->cmd->request_bufflen % 2) {
d_left_counter = 0;
dprintkl(KERN_INFO,
"data_out_phase0: Discard 1 byte (0x%02x)\n",
scsi_status);
}
/*
* KG: Oops again. Same thinko as above: The SCSI might have been
* faster than the DMA engine, so that it ran out of data.
* In that case, we have to do just nothing!
* But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
*/
/*
* KG: This is nonsense: We have been WRITING data to the bus
* If the SCSI engine has no bytes left, how should the DMA engine?
*/
if (d_left_counter == 0) {
srb->total_xfer_length = 0;
} else {
/*
* if transfer not yet complete
* there were some data residue in SCSI FIFO or
* SCSI transfer counter not empty
*/
long oldxferred =
srb->total_xfer_length - d_left_counter;
const int diff =
(dcb->sync_period & WIDE_SYNC) ? 2 : 1;
sg_update_list(srb, d_left_counter);
/* KG: Most ugly hack! Apparently, this works around a chip bug */
if ((srb->segment_x[srb->sg_index].length ==
diff && srb->cmd->use_sg)
|| ((oldxferred & ~PAGE_MASK) ==
(PAGE_SIZE - diff))
) {
dprintkl(KERN_INFO, "data_out_phase0: "
"Work around chip bug (%i)?\n", diff);
d_left_counter =
srb->total_xfer_length - diff;
sg_update_list(srb, d_left_counter);
/*srb->total_xfer_length -= diff; */
/*srb->virt_addr += diff; */
/*if (srb->cmd->use_sg) */
/* srb->sg_index++; */
}
}
}
if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
cleanup_after_transfer(acb, srb);
}
}
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
clear_fifo(acb, "data_out_phase1");
/* do prepare before transfer when data out phase */
data_io_transfer(acb, srb, XFERDATAOUT);
}
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
u16 scsi_status = *pscsi_status;
dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
/*
* KG: DataIn is much more tricky than DataOut. When the device is finished
* and switches to another phase, the SCSI engine should be finished too.
* But: There might still be bytes left in its FIFO to be fetched by the DMA
* engine and transferred to memory.
* We should wait for the FIFOs to be emptied by that (is there any way to
* enforce this?) and then stop the DMA engine, because it might think, that
* there are more bytes to follow. Yes, the device might disconnect prior to
* having all bytes transferred!
* Also we should make sure that all data from the DMA engine buffer's really
* made its way to the system memory! Some documentation on this would not
* seem to be a bad idea, actually.
*/
if (!(srb->state & SRB_XFERPAD)) {
u32 d_left_counter;
unsigned int sc, fc;
if (scsi_status & PARITYERROR) {
dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
"Parity Error\n", srb->cmd->pid);
srb->status |= PARITY_ERROR;
}
/*
* KG: We should wait for the DMA FIFO to be empty ...
* but: it would be better to wait first for the SCSI FIFO and then the
* the DMA FIFO to become empty? How do we know, that the device not already
* sent data to the FIFO in a MsgIn phase, eg.?
*/
if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
#if 0
int ctr = 6000000;
dprintkl(KERN_DEBUG,
"DIP0: Wait for DMA FIFO to flush ...\n");
/*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
/*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
while (!
(DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
0x80) && --ctr);
if (ctr < 6000000 - 1)
dprintkl(KERN_DEBUG
"DIP0: Had to wait for DMA ...\n");
if (!ctr)
dprintkl(KERN_ERR,
"Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
/*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
#endif
dprintkdbg(DBG_KG, "data_in_phase0: "
"DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
}
/* Now: Check remainig data: The SCSI counters should tell us ... */
sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
d_left_counter = sc + ((fc & 0x1f)
<< ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
0));
dprintkdbg(DBG_KG, "data_in_phase0: "
"SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
"DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
"Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
fc,
(srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
sc,
fc,
DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
srb->total_xfer_length, d_left_counter);
#if DC395x_LASTPIO
/* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
if (d_left_counter
&& srb->total_xfer_length <= DC395x_LASTPIO) {
size_t left_io = srb->total_xfer_length;
/*u32 addr = (srb->segment_x[srb->sg_index].address); */
/*sg_update_list (srb, d_left_counter); */
dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
"for remaining %i bytes:",
fc & 0x1f,
(srb->dcb->sync_period & WIDE_SYNC) ?
"words" : "bytes",
srb->total_xfer_length);
if (srb->dcb->sync_period & WIDE_SYNC)
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
CFG2_WIDEFIFO);
while (left_io) {
unsigned char *virt, *base = NULL;
unsigned long flags = 0;
size_t len = left_io;
if (srb->cmd->use_sg) {
size_t offset = srb->request_length - left_io;
local_irq_save(flags);
/* Assumption: it's inside one page as it's at most 4 bytes and
I just assume it's on a 4-byte boundary */
base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
srb->sg_count, &offset, &len);
virt = base + offset;
} else {
virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
len = left_io;
}
left_io -= len;
while (len) {
u8 byte;
byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
*virt++ = byte;
if (debug_enabled(DBG_PIO))
printk(" %02x", byte);
d_left_counter--;
sg_subtract_one(srb);
len--;
fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
if (fc == 0x40) {
left_io = 0;
break;
}
}
WARN_ON((fc != 0x40) == !d_left_counter);
if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
/* Read the last byte ... */
if (srb->total_xfer_length > 0) {
u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
*virt++ = byte;
srb->total_xfer_length--;
if (debug_enabled(DBG_PIO))
printk(" %02x", byte);
}
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
}
if (srb->cmd->use_sg) {
scsi_kunmap_atomic_sg(base);
local_irq_restore(flags);
}
}
/*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
/*srb->total_xfer_length = 0; */
if (debug_enabled(DBG_PIO))
printk("\n");
}
#endif /* DC395x_LASTPIO */
#if 0
/*
* KG: This was in DATAOUT. Does it also belong here?
* Nobody seems to know what counter and fifo_cnt count exactly ...
*/
if (!(scsi_status & SCSIXFERDONE)) {
/*
* when data transfer from DMA FIFO to SCSI FIFO
* if there was some data left in SCSI FIFO
*/
d_left_counter =
(u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
0x1F);
if (srb->dcb->sync_period & WIDE_SYNC)
d_left_counter <<= 1;
/*
* if WIDE scsi SCSI FIFOCNT unit is word !!!
* so need to *= 2
* KG: Seems to be correct ...
*/
}
#endif
/* KG: This should not be needed any more! */
if (d_left_counter == 0
|| (scsi_status & SCSIXFERCNT_2_ZERO)) {
#if 0
int ctr = 6000000;
u8 TempDMAstatus;
do {
TempDMAstatus =
DC395x_read8(acb, TRM_S1040_DMA_STATUS);
} while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
if (!ctr)
dprintkl(KERN_ERR,
"Deadlock in DataInPhase0 waiting for DMA!!\n");
srb->total_xfer_length = 0;
#endif
srb->total_xfer_length = d_left_counter;
} else { /* phase changed */
/*
* parsing the case:
* when a transfer not yet complete
* but be disconnected by target
* if transfer not yet complete
* there were some data residue in SCSI FIFO or
* SCSI transfer counter not empty
*/
sg_update_list(srb, d_left_counter);
}
}
/* KG: The target may decide to disconnect: Empty FIFO before! */
if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
cleanup_after_transfer(acb, srb);
}
}
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
data_io_transfer(acb, srb, XFERDATAIN);
}
static void data_io_transfer(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb, u16 io_dir)
{
struct DeviceCtlBlk *dcb = srb->dcb;
u8 bval;
dprintkdbg(DBG_0,
"data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
((io_dir & DMACMD_DIR) ? 'r' : 'w'),
srb->total_xfer_length, srb->sg_index, srb->sg_count);
if (srb == acb->tmp_srb)
dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
if (srb->sg_index >= srb->sg_count) {
/* can't happen? out of bounds error */
return;
}
if (srb->total_xfer_length > DC395x_LASTPIO) {
u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
/*
* KG: What should we do: Use SCSI Cmd 0x90/0x92?
* Maybe, even ABORTXFER would be appropriate
*/
if (dma_status & XFERPENDING) {
dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
"Expect trouble!\n");
dump_register_info(acb, dcb, srb);
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
}
/* clear_fifo(acb, "IO"); */
/*
* load what physical address of Scatter/Gather list table
* want to be transfer
*/
srb->state |= SRB_DATA_XFER;
DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
if (srb->cmd->use_sg) { /* with S/G */
io_dir |= DMACMD_SG;
DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
srb->sg_bus_addr +
sizeof(struct SGentry) *
srb->sg_index);
/* load how many bytes in the sg list table */
DC395x_write32(acb, TRM_S1040_DMA_XCNT,
((u32)(srb->sg_count -
srb->sg_index) << 3));
} else { /* without S/G */
io_dir &= ~DMACMD_SG;
DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
srb->segment_x[0].address);
DC395x_write32(acb, TRM_S1040_DMA_XCNT,
srb->segment_x[0].length);
}
/* load total transfer length (24bits) max value 16Mbyte */
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
srb->total_xfer_length);
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
if (io_dir & DMACMD_DIR) { /* read */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
SCMD_DMA_IN);
DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
} else {
DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
SCMD_DMA_OUT);
}
}
#if DC395x_LASTPIO
else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */
/*
* load what physical address of Scatter/Gather list table
* want to be transfer
*/
srb->state |= SRB_DATA_XFER;
/* load total transfer length (24bits) max value 16Mbyte */
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
srb->total_xfer_length);
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
if (io_dir & DMACMD_DIR) { /* read */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
SCMD_FIFO_IN);
} else { /* write */
int ln = srb->total_xfer_length;
size_t left_io = srb->total_xfer_length;
if (srb->dcb->sync_period & WIDE_SYNC)
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
CFG2_WIDEFIFO);
while (left_io) {
unsigned char *virt, *base = NULL;
unsigned long flags = 0;
size_t len = left_io;
if (srb->cmd->use_sg) {
size_t offset = srb->request_length - left_io;
local_irq_save(flags);
/* Again, max 4 bytes */
base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
srb->sg_count, &offset, &len);
virt = base + offset;
} else {
virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
len = left_io;
}
left_io -= len;
while (len--) {
if (debug_enabled(DBG_PIO))
printk(" %02x", *virt);
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);
sg_subtract_one(srb);
}
if (srb->cmd->use_sg) {
scsi_kunmap_atomic_sg(base);
local_irq_restore(flags);
}
}
if (srb->dcb->sync_period & WIDE_SYNC) {
if (ln % 2) {
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
if (debug_enabled(DBG_PIO))
printk(" |00");
}
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
}
/*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
if (debug_enabled(DBG_PIO))
printk("\n");
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
SCMD_FIFO_OUT);
}
}
#endif /* DC395x_LASTPIO */
else { /* xfer pad */
u8 data = 0, data2 = 0;
if (srb->sg_count) {
srb->adapter_status = H_OVER_UNDER_RUN;
srb->status |= OVER_RUN;
}
/*
* KG: despite the fact that we are using 16 bits I/O ops
* the SCSI FIFO is only 8 bits according to the docs
* (we can set bit 1 in 0x8f to serialize FIFO access ...)
*/
if (dcb->sync_period & WIDE_SYNC) {
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
CFG2_WIDEFIFO);
if (io_dir & DMACMD_DIR) {
data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
} else {
/* Danger, Robinson: If you find KGs
* scattered over the wide disk, the driver
* or chip is to blame :-( */
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
}
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
} else {
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
/* Danger, Robinson: If you find a collection of Ks on your disk
* something broke :-( */
if (io_dir & DMACMD_DIR)
data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
else
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
}
srb->state |= SRB_XFERPAD;
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
/* SCSI command */
bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
}
}
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */
srb->state = SRB_COMPLETED;
*pscsi_status = PH_BUS_FREE; /*.. initial phase */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
srb->state = SRB_STATUS;
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
}
/* Check if the message is complete */
static inline u8 msgin_completed(u8 * msgbuf, u32 len)
{
if (*msgbuf == EXTENDED_MESSAGE) {
if (len < 2)
return 0;
if (len < msgbuf[1] + 2)
return 0;
} else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */
if (len < 2)
return 0;
return 1;
}
/* reject_msg */
static inline void msgin_reject(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb)
{
srb->msgout_buf[0] = MESSAGE_REJECT;
srb->msg_count = 1;
DC395x_ENABLE_MSGOUT;
srb->state &= ~SRB_MSGIN;
srb->state |= SRB_MSGOUT;
dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
srb->msgin_buf[0],
srb->dcb->target_id, srb->dcb->target_lun);
}
static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb, u8 tag)
{
struct ScsiReqBlk *srb = NULL;
struct ScsiReqBlk *i;
dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
srb->cmd->pid, tag, srb);
if (!(dcb->tag_mask & (1 << tag)))
dprintkl(KERN_DEBUG,
"msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
dcb->tag_mask, tag);
if (list_empty(&dcb->srb_going_list))
goto mingx0;
list_for_each_entry(i, &dcb->srb_going_list, list) {
if (i->tag_number == tag) {
srb = i;
break;
}
}
if (!srb)
goto mingx0;
dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
if (dcb->flag & ABORT_DEV_) {
/*srb->state = SRB_ABORT_SENT; */
enable_msgout_abort(acb, srb);
}
if (!(srb->state & SRB_DISCONNECT))
goto mingx0;
memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
srb->state |= dcb->active_srb->state;
srb->state |= SRB_DATA_XFER;
dcb->active_srb = srb;
/* How can we make the DORS happy? */
return srb;
mingx0:
srb = acb->tmp_srb;
srb->state = SRB_UNEXPECT_RESEL;
dcb->active_srb = srb;
srb->msgout_buf[0] = MSG_ABORT_TAG;
srb->msg_count = 1;
DC395x_ENABLE_MSGOUT;
dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
return srb;
}
static inline void reprogram_regs(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb)
{
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
set_xfer_rate(acb, dcb);
}
/* set async transfer mode */
static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
struct DeviceCtlBlk *dcb = srb->dcb;
dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
dcb->sync_mode |= SYNC_NEGO_DONE;
/*dcb->sync_period &= 0; */
dcb->sync_offset = 0;
dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */
srb->state &= ~SRB_DO_SYNC_NEGO;
reprogram_regs(acb, dcb);
if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
&& !(dcb->sync_mode & WIDE_NEGO_DONE)) {
build_wdtr(acb, dcb, srb);
DC395x_ENABLE_MSGOUT;
dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
}
}
/* set sync transfer mode */
static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
struct DeviceCtlBlk *dcb = srb->dcb;
u8 bval;
int fact;
dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
"(%02i.%01i MHz) Offset %i\n",
dcb->target_id, srb->msgin_buf[3] << 2,
(250 / srb->msgin_buf[3]),
((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
srb->msgin_buf[4]);
if (srb->msgin_buf[4] > 15)
srb->msgin_buf[4] = 15;
if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
dcb->sync_offset = 0;
else if (dcb->sync_offset == 0)
dcb->sync_offset = srb->msgin_buf[4];
if (srb->msgin_buf[4] > dcb->sync_offset)
srb->msgin_buf[4] = dcb->sync_offset;
else
dcb->sync_offset = srb->msgin_buf[4];
bval = 0;
while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
|| dcb->min_nego_period >
clock_period[bval]))
bval++;
if (srb->msgin_buf[3] < clock_period[bval])
dprintkl(KERN_INFO,
"msgin_set_sync: Increase sync nego period to %ins\n",
clock_period[bval] << 2);
srb->msgin_buf[3] = clock_period[bval];
dcb->sync_period &= 0xf0;
dcb->sync_period |= ALT_SYNC | bval;
dcb->min_nego_period = srb->msgin_buf[3];
if (dcb->sync_period & WIDE_SYNC)
fact = 500;
else
fact = 250;
dprintkl(KERN_INFO,
"Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
dcb->target_id, (fact == 500) ? "Wide16" : "",
dcb->min_nego_period << 2, dcb->sync_offset,
(fact / dcb->min_nego_period),
((fact % dcb->min_nego_period) * 10 +
dcb->min_nego_period / 2) / dcb->min_nego_period);
if (!(srb->state & SRB_DO_SYNC_NEGO)) {
/* Reply with corrected SDTR Message */
dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
srb->msgin_buf[3] << 2, srb->msgin_buf[4]);
memcpy(srb->msgout_buf, srb->msgin_buf, 5);
srb->msg_count = 5;
DC395x_ENABLE_MSGOUT;
dcb->sync_mode |= SYNC_NEGO_DONE;
} else {
if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
&& !(dcb->sync_mode & WIDE_NEGO_DONE)) {
build_wdtr(acb, dcb, srb);
DC395x_ENABLE_MSGOUT;
dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
}
}
srb->state &= ~SRB_DO_SYNC_NEGO;
dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;
reprogram_regs(acb, dcb);
}
static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb)
{
struct DeviceCtlBlk *dcb = srb->dcb;
dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);
dcb->sync_period &= ~WIDE_SYNC;
dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
dcb->sync_mode |= WIDE_NEGO_DONE;
srb->state &= ~SRB_DO_WIDE_NEGO;
reprogram_regs(acb, dcb);
if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
&& !(dcb->sync_mode & SYNC_NEGO_DONE)) {
build_sdtr(acb, dcb, srb);
DC395x_ENABLE_MSGOUT;
dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
}
}
static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
struct DeviceCtlBlk *dcb = srb->dcb;
u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
&& acb->config & HCC_WIDE_CARD) ? 1 : 0;
dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);
if (srb->msgin_buf[3] > wide)
srb->msgin_buf[3] = wide;
/* Completed */
if (!(srb->state & SRB_DO_WIDE_NEGO)) {
dprintkl(KERN_DEBUG,
"msgin_set_wide: Wide nego initiated <%02i>\n",
dcb->target_id);
memcpy(srb->msgout_buf, srb->msgin_buf, 4);
srb->msg_count = 4;
srb->state |= SRB_DO_WIDE_NEGO;
DC395x_ENABLE_MSGOUT;
}
dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
if (srb->msgin_buf[3] > 0)
dcb->sync_period |= WIDE_SYNC;
else
dcb->sync_period &= ~WIDE_SYNC;
srb->state &= ~SRB_DO_WIDE_NEGO;
/*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
dprintkdbg(DBG_1,
"msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
(8 << srb->msgin_buf[3]), dcb->target_id);
reprogram_regs(acb, dcb);
if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
&& !(dcb->sync_mode & SYNC_NEGO_DONE)) {
build_sdtr(acb, dcb, srb);
DC395x_ENABLE_MSGOUT;
dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
}
}
/*
* extended message codes:
*
* code description
*
* 02h Reserved
* 00h MODIFY DATA POINTER
* 01h SYNCHRONOUS DATA TRANSFER REQUEST
* 03h WIDE DATA TRANSFER REQUEST
* 04h - 7Fh Reserved
* 80h - FFh Vendor specific
*/
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
struct DeviceCtlBlk *dcb = acb->active_dcb;
dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);
srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
/* Now eval the msg */
switch (srb->msgin_buf[0]) {
case DISCONNECT:
srb->state = SRB_DISCONNECT;
break;
case SIMPLE_QUEUE_TAG:
case HEAD_OF_QUEUE_TAG:
case ORDERED_QUEUE_TAG:
srb =
msgin_qtag(acb, dcb,
srb->msgin_buf[1]);
break;
case MESSAGE_REJECT:
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
DO_CLRATN | DO_DATALATCH);
/* A sync nego message was rejected ! */
if (srb->state & SRB_DO_SYNC_NEGO) {
msgin_set_async(acb, srb);
break;
}
/* A wide nego message was rejected ! */
if (srb->state & SRB_DO_WIDE_NEGO) {
msgin_set_nowide(acb, srb);
break;
}
enable_msgout_abort(acb, srb);
/*srb->state |= SRB_ABORT_SENT */
break;
case EXTENDED_MESSAGE:
/* SDTR */
if (srb->msgin_buf[1] == 3
&& srb->msgin_buf[2] == EXTENDED_SDTR) {
msgin_set_sync(acb, srb);
break;
}
/* WDTR */
if (srb->msgin_buf[1] == 2
&& srb->msgin_buf[2] == EXTENDED_WDTR
&& srb->msgin_buf[3] <= 2) { /* sanity check ... */
msgin_set_wide(acb, srb);
break;
}
msgin_reject(acb, srb);
break;
case MSG_IGNOREWIDE:
/* Discard wide residual */
dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
break;
case COMMAND_COMPLETE:
/* nothing has to be done */
break;
case SAVE_POINTERS:
/*
* SAVE POINTER may be ignored as we have the struct
* ScsiReqBlk* associated with the scsi command.
*/
dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
"SAVE POINTER rem=%i Ignore\n",
srb->cmd->pid, srb->total_xfer_length);
break;
case RESTORE_POINTERS:
dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
break;
case ABORT:
dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
"<%02i-%i> ABORT msg\n",
srb->cmd->pid, dcb->target_id,
dcb->target_lun);
dcb->flag |= ABORT_DEV_;
enable_msgout_abort(acb, srb);
break;
default:
/* reject unknown messages */
if (srb->msgin_buf[0] & IDENTIFY_BASE) {
dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
srb->msg_count = 1;
srb->msgout_buf[0] = dcb->identify_msg;
DC395x_ENABLE_MSGOUT;
srb->state |= SRB_MSGOUT;
/*break; */
}
msgin_reject(acb, srb);
}
/* Clear counter and MsgIn state */
srb->state &= ~SRB_MSGIN;
acb->msg_len = 0;
}
*pscsi_status = PH_BUS_FREE;
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
clear_fifo(acb, "msgin_phase1");
DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
if (!(srb->state & SRB_MSGIN)) {
srb->state &= ~SRB_DISCONNECT;
srb->state |= SRB_MSGIN;
}
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
/* SCSI command */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
}
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
}
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
u16 *pscsi_status)
{
}
static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
{
struct DeviceCtlBlk *i;
/* set all lun device's period, offset */
if (dcb->identify_msg & 0x07)
return;
if (acb->scan_devices) {
current_sync_offset = dcb->sync_offset;
return;
}
list_for_each_entry(i, &acb->dcb_list, list)
if (i->target_id == dcb->target_id) {
i->sync_period = dcb->sync_period;
i->sync_offset = dcb->sync_offset;
i->sync_mode = dcb->sync_mode;
i->min_nego_period = dcb->min_nego_period;
}
}
static void disconnect(struct AdapterCtlBlk *acb)
{
struct DeviceCtlBlk *dcb = acb->active_dcb;
struct ScsiReqBlk *srb;
if (!dcb) {
dprintkl(KERN_ERR, "disconnect: No such device\n");
udelay(500);
/* Suspend queue for a while */
acb->scsi_host->last_reset =
jiffies + HZ / 2 +
HZ * acb->eeprom.delay_time;
clear_fifo(acb, "disconnectEx");
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
return;
}
srb = dcb->active_srb;
acb->active_dcb = NULL;
dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
clear_fifo(acb, "disconnect");
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
if (srb->state & SRB_UNEXPECT_RESEL) {
dprintkl(KERN_ERR,
"disconnect: Unexpected reselection <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
srb->state = 0;
waiting_process_next(acb);
} else if (srb->state & SRB_ABORT_SENT) {
dcb->flag &= ~ABORT_DEV_;
acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
waiting_process_next(acb);
} else {
if ((srb->state & (SRB_START_ + SRB_MSGOUT))
|| !(srb->
state & (SRB_DISCONNECT + SRB_COMPLETED))) {
/*
* Selection time out
* SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
*/
/* Unexp. Disc / Sel Timeout */
if (srb->state != SRB_START_
&& srb->state != SRB_MSGOUT) {
srb->state = SRB_READY;
dprintkl(KERN_DEBUG,
"disconnect: (pid#%li) Unexpected\n",
srb->cmd->pid);
srb->target_status = SCSI_STAT_SEL_TIMEOUT;
goto disc1;
} else {
/* Normal selection timeout */
dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
"<%02i-%i> SelTO\n", srb->cmd->pid,
dcb->target_id, dcb->target_lun);
if (srb->retry_count++ > DC395x_MAX_RETRIES
|| acb->scan_devices) {
srb->target_status =
SCSI_STAT_SEL_TIMEOUT;
goto disc1;
}
free_tag(dcb, srb);
srb_going_to_waiting_move(dcb, srb);
dprintkdbg(DBG_KG,
"disconnect: (pid#%li) Retry\n",
srb->cmd->pid);
waiting_set_timer(acb, HZ / 20);
}
} else if (srb->state & SRB_DISCONNECT) {
u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
/*
* SRB_DISCONNECT (This is what we expect!)
*/
if (bval & 0x40) {
dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
" 0x%02x: ACK set! Other controllers?\n",
bval);
/* It could come from another initiator, therefore don't do much ! */
} else
waiting_process_next(acb);
} else if (srb->state & SRB_COMPLETED) {
disc1:
/*
** SRB_COMPLETED
*/
free_tag(dcb, srb);
dcb->active_srb = NULL;
srb->state = SRB_FREE;
srb_done(acb, dcb, srb);
}
}
}
static void reselect(struct AdapterCtlBlk *acb)
{
struct DeviceCtlBlk *dcb = acb->active_dcb;
struct ScsiReqBlk *srb = NULL;
u16 rsel_tar_lun_id;
u8 id, lun;
u8 arblostflag = 0;
dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);
clear_fifo(acb, "reselect");
/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
/* Read Reselected Target ID and LUN */
rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
if (dcb) { /* Arbitration lost but Reselection win */
srb = dcb->active_srb;
if (!srb) {
dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
"but active_srb == NULL\n");
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
return;
}
/* Why the if ? */
if (!acb->scan_devices) {
dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
"Arb lost but Resel win rsel=%i stat=0x%04x\n",
srb->cmd->pid, dcb->target_id,
dcb->target_lun, rsel_tar_lun_id,
DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
arblostflag = 1;
/*srb->state |= SRB_DISCONNECT; */
srb->state = SRB_READY;
free_tag(dcb, srb);
srb_going_to_waiting_move(dcb, srb);
waiting_set_timer(acb, HZ / 20);
/* return; */
}
}
/* Read Reselected Target Id and LUN */
if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
"Got %i!\n", rsel_tar_lun_id);
id = rsel_tar_lun_id & 0xff;
lun = (rsel_tar_lun_id >> 8) & 7;
dcb = find_dcb(acb, id, lun);
if (!dcb) {
dprintkl(KERN_ERR, "reselect: From non existent device "
"<%02i-%i>\n", id, lun);
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
return;
}
acb->active_dcb = dcb;
if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
"disconnection? <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
srb = acb->tmp_srb;
dcb->active_srb = srb;
} else {
/* There can be only one! */
srb = dcb->active_srb;
if (!srb || !(srb->state & SRB_DISCONNECT)) {
/*
* abort command
*/
dprintkl(KERN_DEBUG,
"reselect: w/o disconnected cmds <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
srb = acb->tmp_srb;
srb->state = SRB_UNEXPECT_RESEL;
dcb->active_srb = srb;
enable_msgout_abort(acb, srb);
} else {
if (dcb->flag & ABORT_DEV_) {
/*srb->state = SRB_ABORT_SENT; */
enable_msgout_abort(acb, srb);
} else
srb->state = SRB_DATA_XFER;
}
}
srb->scsi_phase = PH_BUS_FREE; /* initial phase */
/* Program HA ID, target ID, period and offset */
dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */
DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */
DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */
/* SCSI command */
DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}
static inline u8 tagq_blacklist(char *name)
{
#ifndef DC395x_NO_TAGQ
#if 0
u8 i;
for (i = 0; i < BADDEVCNT; i++)
if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
return 1;
#endif
return 0;
#else
return 1;
#endif
}
static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
{
/* Check for SCSI format (ANSI and Response data format) */
if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
&& (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
/*(dcb->dev_mode & NTC_DO_DISCONNECT) */
/* ((dcb->dev_type == TYPE_DISK)
|| (dcb->dev_type == TYPE_MOD)) && */
!tagq_blacklist(((char *)ptr) + 8)) {
if (dcb->max_command == 1)
dcb->max_command =
dcb->acb->tag_max_num;
dcb->sync_mode |= EN_TAG_QUEUEING;
/*dcb->tag_mask = 0; */
} else
dcb->max_command = 1;
}
}
static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiInqData *ptr)
{
u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
dcb->dev_type = bval1;
/* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
disc_tagq_set(dcb, ptr);
}
/* unmap mapped pci regions from SRB */
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
struct scsi_cmnd *cmd = srb->cmd;
enum dma_data_direction dir = cmd->sc_data_direction;
if (cmd->use_sg && dir != PCI_DMA_NONE) {
/* unmap DC395x SG list */
dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
srb->sg_bus_addr, SEGMENTX_LEN);
pci_unmap_single(acb->dev, srb->sg_bus_addr,
SEGMENTX_LEN,
PCI_DMA_TODEVICE);
dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
cmd->use_sg, cmd->request_buffer);
/* unmap the sg segments */
pci_unmap_sg(acb->dev,
(struct scatterlist *)cmd->request_buffer,
cmd->use_sg, dir);
} else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
srb->segment_x[0].address, cmd->request_bufflen);
pci_unmap_single(acb->dev, srb->segment_x[0].address,
cmd->request_bufflen, dir);
}
}
/* unmap mapped pci sense buffer from SRB */
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
struct ScsiReqBlk *srb)
{
if (!(srb->flag & AUTO_REQSENSE))
return;
/* Unmap sense buffer */
dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
srb->segment_x[0].address);
pci_unmap_single(acb->dev, srb->segment_x[0].address,
srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
/* Restore SG stuff */
srb->total_xfer_length = srb->xferred;
srb->segment_x[0].address =
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
srb->segment_x[0].length =
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
}
/*
* Complete execution of a SCSI command
* Signal completion to the generic SCSI driver
*/
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
u8 tempcnt, status;
struct scsi_cmnd *cmd = srb->cmd;
enum dma_data_direction dir = cmd->sc_data_direction;
int ckc_only = 1;
dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
srb->cmd->device->id, srb->cmd->device->lun);
dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
srb, cmd->use_sg, srb->sg_index, srb->sg_count,
cmd->request_buffer);
status = srb->target_status;
if (srb->flag & AUTO_REQSENSE) {
dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
pci_unmap_srb_sense(acb, srb);
/*
** target status..........................
*/
srb->flag &= ~AUTO_REQSENSE;
srb->adapter_status = 0;
srb->target_status = CHECK_CONDITION << 1;
if (debug_enabled(DBG_1)) {
switch (cmd->sense_buffer[2] & 0x0f) {
case NOT_READY:
dprintkl(KERN_DEBUG,
"ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
cmd->cmnd[0], dcb->target_id,
dcb->target_lun, status, acb->scan_devices);
break;
case UNIT_ATTENTION:
dprintkl(KERN_DEBUG,
"ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
cmd->cmnd[0], dcb->target_id,
dcb->target_lun, status, acb->scan_devices);
break;
case ILLEGAL_REQUEST:
dprintkl(KERN_DEBUG,
"ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
cmd->cmnd[0], dcb->target_id,
dcb->target_lun, status, acb->scan_devices);
break;
case MEDIUM_ERROR:
dprintkl(KERN_DEBUG,
"ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
cmd->cmnd[0], dcb->target_id,
dcb->target_lun, status, acb->scan_devices);
break;
case HARDWARE_ERROR:
dprintkl(KERN_DEBUG,
"ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
cmd->cmnd[0], dcb->target_id,
dcb->target_lun, status, acb->scan_devices);
break;
}
if (cmd->sense_buffer[7] >= 6)
printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
"(0x%08x 0x%08x)\n",
cmd->sense_buffer[2], cmd->sense_buffer[12],
cmd->sense_buffer[13],
*((unsigned int *)(cmd->sense_buffer + 3)),
*((unsigned int *)(cmd->sense_buffer + 8)));
else
printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
cmd->sense_buffer[2],
*((unsigned int *)(cmd->sense_buffer + 3)));
}
if (status == (CHECK_CONDITION << 1)) {
cmd->result = DID_BAD_TARGET << 16;
goto ckc_e;
}
dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");
if (srb->total_xfer_length
&& srb->total_xfer_length >= cmd->underflow)
cmd->result =
MK_RES_LNX(DRIVER_SENSE, DID_OK,
srb->end_message, CHECK_CONDITION);
/*SET_RES_DID(cmd->result,DID_OK) */
else
cmd->result =
MK_RES_LNX(DRIVER_SENSE, DID_OK,
srb->end_message, CHECK_CONDITION);
goto ckc_e;
}
/*************************************************************/
if (status) {
/*
* target status..........................
*/
if (status_byte(status) == CHECK_CONDITION) {
request_sense(acb, dcb, srb);
return;
} else if (status_byte(status) == QUEUE_FULL) {
tempcnt = (u8)list_size(&dcb->srb_going_list);
dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
dcb->target_id, dcb->target_lun, tempcnt);
if (tempcnt > 1)
tempcnt--;
dcb->max_command = tempcnt;
free_tag(dcb, srb);
srb_going_to_waiting_move(dcb, srb);
waiting_set_timer(acb, HZ / 20);
srb->adapter_status = 0;
srb->target_status = 0;
return;
} else if (status == SCSI_STAT_SEL_TIMEOUT) {
srb->adapter_status = H_SEL_TIMEOUT;
srb->target_status = 0;
cmd->result = DID_NO_CONNECT << 16;
} else {
srb->adapter_status = 0;
SET_RES_DID(cmd->result, DID_ERROR);
SET_RES_MSG(cmd->result, srb->end_message);
SET_RES_TARGET(cmd->result, status);
}
} else {
/*
** process initiator status..........................
*/
status = srb->adapter_status;
if (status & H_OVER_UNDER_RUN) {
srb->target_status = 0;
SET_RES_DID(cmd->result, DID_OK);
SET_RES_MSG(cmd->result, srb->end_message);
} else if (srb->status & PARITY_ERROR) {
SET_RES_DID(cmd->result, DID_PARITY);
SET_RES_MSG(cmd->result, srb->end_message);
} else { /* No error */
srb->adapter_status = 0;
srb->target_status = 0;
SET_RES_DID(cmd->result, DID_OK);
}
}
if (dir != PCI_DMA_NONE) {
if (cmd->use_sg)
pci_dma_sync_sg_for_cpu(acb->dev,
(struct scatterlist *)cmd->
request_buffer, cmd->use_sg, dir);
else if (cmd->request_buffer)
pci_dma_sync_single_for_cpu(acb->dev,
srb->segment_x[0].address,
cmd->request_bufflen, dir);
}
ckc_only = 0;
/* Check Error Conditions */
ckc_e:
if (cmd->cmnd[0] == INQUIRY) {
unsigned char *base = NULL;
struct ScsiInqData *ptr;
unsigned long flags = 0;
if (cmd->use_sg) {
struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
size_t offset = 0, len = sizeof(struct ScsiInqData);
local_irq_save(flags);
base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len);
ptr = (struct ScsiInqData *)(base + offset);
} else
ptr = (struct ScsiInqData *)(cmd->request_buffer);
if (!ckc_only && (cmd->result & RES_DID) == 0
&& cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
&& dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
dcb->inquiry7 = ptr->Flags;
/*if( srb->cmd->cmnd[0] == INQUIRY && */
/* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
if ((cmd->result == (DID_OK << 16)
|| status_byte(cmd->result) &
CHECK_CONDITION)) {
if (!dcb->init_tcq_flag) {
add_dev(acb, dcb, ptr);
dcb->init_tcq_flag = 1;
}
}
if (cmd->use_sg) {
scsi_kunmap_atomic_sg(base);
local_irq_restore(flags);
}
}
/* Here is the info for Doug Gilbert's sg3 ... */
cmd->resid = srb->total_xfer_length;
/* This may be interpreted by sb. or not ... */
cmd->SCp.this_residual = srb->total_xfer_length;
cmd->SCp.buffers_residual = 0;
if (debug_enabled(DBG_KG)) {
if (srb->total_xfer_length)
dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
"cmnd=0x%02x Missed %i bytes\n",
cmd->pid, cmd->device->id, cmd->device->lun,
cmd->cmnd[0], srb->total_xfer_length);
}
srb_going_remove(dcb, srb);
/* Add to free list */
if (srb == acb->tmp_srb)
dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
else {
dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
cmd->pid, cmd->result);
srb_free_insert(acb, srb);
}
pci_unmap_srb(acb, srb);
cmd->scsi_done(cmd);
waiting_process_next(acb);
}
/* abort all cmds in our queues */
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
struct scsi_cmnd *cmd, u8 force)
{
struct DeviceCtlBlk *dcb;
dprintkl(KERN_INFO, "doing_srb_done: pids ");
list_for_each_entry(dcb, &acb->dcb_list, list) {
struct ScsiReqBlk *srb;
struct ScsiReqBlk *tmp;
struct scsi_cmnd *p;
list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
enum dma_data_direction dir;
int result;
p = srb->cmd;
dir = p->sc_data_direction;
result = MK_RES(0, did_flag, 0, 0);
printk("G:%li(%02i-%i) ", p->pid,
p->device->id, p->device->lun);
srb_going_remove(dcb, srb);
free_tag(dcb, srb);
srb_free_insert(acb, srb);
p->result = result;
pci_unmap_srb_sense(acb, srb);
pci_unmap_srb(acb, srb);
if (force) {
/* For new EH, we normally don't need to give commands back,
* as they all complete or all time out */
p->scsi_done(p);
}
}
if (!list_empty(&dcb->srb_going_list))
dprintkl(KERN_DEBUG,
"How could the ML send cmnds to the Going queue? <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
if (dcb->tag_mask)
dprintkl(KERN_DEBUG,
"tag_mask for <%02i-%i> should be empty, is %08x!\n",
dcb->target_id, dcb->target_lun,
dcb->tag_mask);
/* Waiting queue */
list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
int result;
p = srb->cmd;
result = MK_RES(0, did_flag, 0, 0);
printk("W:%li<%02i-%i>", p->pid, p->device->id,
p->device->lun);
srb_waiting_remove(dcb, srb);
srb_free_insert(acb, srb);
p->result = result;
pci_unmap_srb_sense(acb, srb);
pci_unmap_srb(acb, srb);
if (force) {
/* For new EH, we normally don't need to give commands back,
* as they all complete or all time out */
cmd->scsi_done(cmd);
}
}
if (!list_empty(&dcb->srb_waiting_list))
dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
list_size(&dcb->srb_waiting_list), dcb->target_id,
dcb->target_lun);
dcb->flag &= ~ABORT_DEV_;
}
printk("\n");
}
static void reset_scsi_bus(struct AdapterCtlBlk *acb)
{
dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
/* nothing */;
}
static void set_basic_config(struct AdapterCtlBlk *acb)
{
u8 bval;
u16 wval;
DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
if (acb->config & HCC_PARITY)
bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
else
bval = PHASELATCH | INITIATOR | BLOCKRST;
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);
/* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */
/* program Host ID */
DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
/* set ansynchronous transfer */
DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
/* Turn LED control off */
wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
/* DMA config */
wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
wval |=
DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
/* Clear pending interrupt status */
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
/* Enable SCSI interrupt */
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
/*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
);
}
static void scsi_reset_detect(struct AdapterCtlBlk *acb)
{
dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
/* delay half a second */
if (timer_pending(&acb->waiting_timer))
del_timer(&acb->waiting_timer);
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
/*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
udelay(500);
/* Maybe we locked up the bus? Then lets wait even longer ... */
acb->scsi_host->last_reset =
jiffies + 5 * HZ / 2 +
HZ * acb->eeprom.delay_time;
clear_fifo(acb, "scsi_reset_detect");
set_basic_config(acb);
/*1.25 */
/*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */
if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */
acb->acb_flag |= RESET_DONE;
} else {
acb->acb_flag |= RESET_DETECT;
reset_dev_param(acb);
doing_srb_done(acb, DID_RESET, NULL, 1);
/*DC395x_RecoverSRB( acb ); */
acb->active_dcb = NULL;
acb->acb_flag = 0;
waiting_process_next(acb);
}
}
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
struct ScsiReqBlk *srb)
{
struct scsi_cmnd *cmd = srb->cmd;
dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
cmd->pid, cmd->device->id, cmd->device->lun);
srb->flag |= AUTO_REQSENSE;
srb->adapter_status = 0;
srb->target_status = 0;
/* KG: Can this prevent crap sense data ? */
memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
/* Save some data */
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
srb->segment_x[0].address;
srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
srb->segment_x[0].length;
srb->xferred = srb->total_xfer_length;
/* srb->segment_x : a one entry of S/G list table */
srb->total_xfer_length = sizeof(cmd->sense_buffer);
srb->segment_x[0].length = sizeof(cmd->sense_buffer);
/* Map sense buffer */
srb->segment_x[0].address =
pci_map_single(acb->dev, cmd->sense_buffer,
sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
cmd->sense_buffer, srb->segment_x[0].address,
sizeof(cmd->sense_buffer));
srb->sg_count = 1;
srb->sg_index = 0;
if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */
dprintkl(KERN_DEBUG,
"request_sense: (pid#%li) failed <%02i-%i>\n",
srb->cmd->pid, dcb->target_id, dcb->target_lun);
srb_going_to_waiting_move(dcb, srb);
waiting_set_timer(acb, HZ / 100);
}
}
/**
* device_alloc - Allocate a new device instance. This create the
* devices instance and sets up all the data items. The adapter
* instance is required to obtain confiuration information for this
* device. This does *not* add this device to the adapters device
* list.
*
* @acb: The adapter to obtain configuration information from.
* @target: The target for the new device.
* @lun: The lun for the new device.
*
* Return the new device if successful or NULL on failure.
**/
static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
u8 target, u8 lun)
{
struct NvRamType *eeprom = &acb->eeprom;
u8 period_index = eeprom->target[target].period & 0x07;
struct DeviceCtlBlk *dcb;
dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
if (!dcb)
return NULL;
dcb->acb = NULL;
INIT_LIST_HEAD(&dcb->srb_going_list);
INIT_LIST_HEAD(&dcb->srb_waiting_list);
dcb->active_srb = NULL;
dcb->tag_mask = 0;
dcb->max_command = 1;
dcb->target_id = target;
dcb->target_lun = lun;
#ifndef DC395x_NO_DISCONNECT
dcb->identify_msg =
IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
#else
dcb->identify_msg = IDENTIFY(0, lun);
#endif
dcb->dev_mode = eeprom->target[target].cfg0;
dcb->inquiry7 = 0;
dcb->sync_mode = 0;
dcb->min_nego_period = clock_period[period_index];
dcb->sync_period = 0;
dcb->sync_offset = 0;
dcb->flag = 0;
#ifndef DC395x_NO_WIDE
if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
&& (acb->config & HCC_WIDE_CARD))
dcb->sync_mode |= WIDE_NEGO_ENABLE;
#endif
#ifndef DC395x_NO_SYNC
if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
if (!(lun) || current_sync_offset)
dcb->sync_mode |= SYNC_NEGO_ENABLE;
#endif
if (dcb->target_lun != 0) {
/* Copy settings */
struct DeviceCtlBlk *p;
list_for_each_entry(p, &acb->dcb_list, list)
if (p->target_id == dcb->target_id)
break;
dprintkdbg(DBG_1,
"device_alloc: <%02i-%i> copy from <%02i-%i>\n",
dcb->target_id, dcb->target_lun,
p->target_id, p->target_lun);
dcb->sync_mode = p->sync_mode;
dcb->sync_period = p->sync_period;
dcb->min_nego_period = p->min_nego_period;
dcb->sync_offset = p->sync_offset;
dcb->inquiry7 = p->inquiry7;
}
return dcb;
}
/**
* adapter_add_device - Adds the device instance to the adaptor instance.
*
* @acb: The adapter device to be updated
* @dcb: A newly created and intialised device instance to add.
**/
static void adapter_add_device(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb)
{
/* backpointer to adapter */
dcb->acb = acb;
/* set run_robin to this device if it is currently empty */
if (list_empty(&acb->dcb_list))
acb->dcb_run_robin = dcb;
/* add device to list */
list_add_tail(&dcb->list, &acb->dcb_list);
/* update device maps */
acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
acb->children[dcb->target_id][dcb->target_lun] = dcb;
}
/**
* adapter_remove_device - Removes the device instance from the adaptor
* instance. The device instance is not check in any way or freed by this.
* The caller is expected to take care of that. This will simply remove the
* device from the adapters data strcutures.
*
* @acb: The adapter device to be updated
* @dcb: A device that has previously been added to the adapter.
**/
static void adapter_remove_device(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb)
{
struct DeviceCtlBlk *i;
struct DeviceCtlBlk *tmp;
dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
dcb->target_id, dcb->target_lun);
/* fix up any pointers to this device that we have in the adapter */
if (acb->active_dcb == dcb)
acb->active_dcb = NULL;
if (acb->dcb_run_robin == dcb)
acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);
/* unlink from list */
list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
if (dcb == i) {
list_del(&i->list);
break;
}
/* clear map and children */
acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
acb->children[dcb->target_id][dcb->target_lun] = NULL;
dcb->acb = NULL;
}
/**
* adapter_remove_and_free_device - Removes a single device from the adapter
* and then frees the device information.
*
* @acb: The adapter device to be updated
* @dcb: A device that has previously been added to the adapter.
*/
static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
struct DeviceCtlBlk *dcb)
{
if (list_size(&dcb->srb_going_list) > 1) {
dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
"Won't remove because of %i active requests.\n",
dcb->target_id, dcb->target_lun,
list_size(&dcb->srb_going_list));
return;
}
adapter_remove_device(acb, dcb);
kfree(dcb);
}
/**
* adapter_remove_and_free_all_devices - Removes and frees all of the
* devices associated with the specified adapter.
*
* @acb: The adapter from which all devices should be removed.
**/
static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
{
struct DeviceCtlBlk *dcb;
struct DeviceCtlBlk *tmp;
dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
list_size(&acb->dcb_list));
list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
adapter_remove_and_free_device(acb, dcb);
}
/**
* dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
* scsi device that we need to deal with. We allocate a new device and then
* insert that device into the adapters device list.
*
* @scsi_device: The new scsi device that we need to handle.
**/
static int dc395x_slave_alloc(struct scsi_device *scsi_device)
{
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
struct DeviceCtlBlk *dcb;
dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
if (!dcb)
return -ENOMEM;
adapter_add_device(acb, dcb);
return 0;
}
/**
* dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
* device that is going away.
*
* @scsi_device: The new scsi device that we need to handle.
**/
static void dc395x_slave_destroy(struct scsi_device *scsi_device)
{
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
if (dcb)
adapter_remove_and_free_device(acb, dcb);
}
/**
* trms1040_wait_30us: wait for 30 us
*
* Waits for 30us (using the chip by the looks of it..)
*
* @io_port: base I/O address
**/
static void __devinit trms1040_wait_30us(unsigned long io_port)
{
/* ScsiPortStallExecution(30); wait 30 us */
outb(5, io_port + TRM_S1040_GEN_TIMER);
while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
/* nothing */ ;
}
/**
* trms1040_write_cmd - write the secified command and address to
* chip
*
* @io_port: base I/O address
* @cmd: SB + op code (command) to send
* @addr: address to send
**/
static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
{
int i;
u8 send_data;
/* program SB + OP code */
for (i = 0; i < 3; i++, cmd <<= 1) {
send_data = NVR_SELECT;
if (cmd & 0x04) /* Start from bit 2 */
send_data |= NVR_BITOUT;
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb((send_data | NVR_CLOCK),
io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
}
/* send address */
for (i = 0; i < 7; i++, addr <<= 1) {
send_data = NVR_SELECT;
if (addr & 0x40) /* Start from bit 6 */
send_data |= NVR_BITOUT;
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb((send_data | NVR_CLOCK),
io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
}
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
}
/**
* trms1040_set_data - store a single byte in the eeprom
*
* Called from write all to write a single byte into the SSEEPROM
* Which is done one bit at a time.
*
* @io_port: base I/O address
* @addr: offset into EEPROM
* @byte: bytes to write
**/
static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
{
int i;
u8 send_data;
/* Send write command & address */
trms1040_write_cmd(io_port, 0x05, addr);
/* Write data */
for (i = 0; i < 8; i++, byte <<= 1) {
send_data = NVR_SELECT;
if (byte & 0x80) /* Start from bit 7 */
send_data |= NVR_BITOUT;
outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
}
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
/* Disable chip select */
outb(0, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
/* Wait for write ready */
while (1) {
outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
break;
}
/* Disable chip select */
outb(0, io_port + TRM_S1040_GEN_NVRAM);
}
/**
* trms1040_write_all - write 128 bytes to the eeprom
*
* Write the supplied 128 bytes to the chips SEEPROM
*
* @eeprom: the data to write
* @io_port: the base io port
**/
static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
{
u8 *b_eeprom = (u8 *)eeprom;
u8 addr;
/* Enable SEEPROM */
outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
io_port + TRM_S1040_GEN_CONTROL);
/* write enable */
trms1040_write_cmd(io_port, 0x04, 0xFF);
outb(0, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
/* write */
for (addr = 0; addr < 128; addr++, b_eeprom++)
trms1040_set_data(io_port, addr, *b_eeprom);
/* write disable */
trms1040_write_cmd(io_port, 0x04, 0x00);
outb(0, io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
/* Disable SEEPROM */
outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
io_port + TRM_S1040_GEN_CONTROL);
}
/**
* trms1040_get_data - get a single byte from the eeprom
*
* Called from read all to read a single byte into the SSEEPROM
* Which is done one bit at a time.
*
* @io_port: base I/O address
* @addr: offset into SEEPROM
*
* Returns the the byte read.
**/
static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
{
int i;
u8 read_byte;
u8 result = 0;
/* Send read command & address */
trms1040_write_cmd(io_port, 0x06, addr);
/* read data */
for (i = 0; i < 8; i++) {
outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
trms1040_wait_30us(io_port);
outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
/* Get data bit while falling edge */
read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
result <<= 1;
if (read_byte & NVR_BITIN)
result |= 1;
trms1040_wait_30us(io_port);
}
/* Disable chip select */
outb(0, io_port + TRM_S1040_GEN_NVRAM);
return result;
}
/**
* trms1040_read_all - read all bytes from the eeprom
*
* Read the 128 bytes from the SEEPROM.
*
* @eeprom: where to store the data
* @io_port: the base io port
**/
static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
{
u8 *b_eeprom = (u8 *)eeprom;
u8 addr;
/* Enable SEEPROM */
outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
io_port + TRM_S1040_GEN_CONTROL);
/* read details */
for (addr = 0; addr < 128; addr++, b_eeprom++)
*b_eeprom = trms1040_get_data(io_port, addr);
/* Disable SEEPROM */
outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
io_port + TRM_S1040_GEN_CONTROL);
}
/**
* check_eeprom - get and check contents of the eeprom
*
* Read seeprom 128 bytes into the memory provider in eeprom.
* Checks the checksum and if it's not correct it uses a set of default
* values.
*
* @eeprom: caller allocated strcuture to read the eeprom data into
* @io_port: io port to read from
**/
static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
{
u16 *w_eeprom = (u16 *)eeprom;
u16 w_addr;
u16 cksum;
u32 d_addr;
u32 *d_eeprom;
trms1040_read_all(eeprom, io_port); /* read eeprom */
cksum = 0;
for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
w_addr++, w_eeprom++)
cksum += *w_eeprom;
if (cksum != 0x1234) {
/*
* Checksum is wrong.
* Load a set of defaults into the eeprom buffer
*/
dprintkl(KERN_WARNING,
"EEProm checksum error: using default values and options.\n");
eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
eeprom->sub_sys_id[1] =
(u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
eeprom->sub_class = 0x00;
eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
eeprom->device_id[1] =
(u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
eeprom->reserved = 0x00;
for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
d_addr < 16; d_addr++, d_eeprom++)
*d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */
*d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */
*d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */
for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
*d_eeprom = 0x00;
/* Now load defaults (maybe set by boot/module params) */
set_safe_settings();
fix_settings();
eeprom_override(eeprom);
eeprom->cksum = 0x00;
for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
w_addr < 63; w_addr++, w_eeprom++)
cksum += *w_eeprom;
*w_eeprom = 0x1234 - cksum;
trms1040_write_all(eeprom, io_port);
eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
} else {
set_safe_settings();
eeprom_index_to_delay(eeprom);
eeprom_override(eeprom);
}
}
/**
* print_eeprom_settings - output the eeprom settings
* to the kernel log so people can see what they were.
*
* @eeprom: The eeprom data strucutre to show details for.
**/
static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
{
dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
eeprom->scsi_id,
eeprom->target[0].period,
clock_speed[eeprom->target[0].period] / 10,
clock_speed[eeprom->target[0].period] % 10,
eeprom->target[0].cfg0);
dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
eeprom->channel_cfg, eeprom->max_tag,
1 << eeprom->max_tag, eeprom->delay_time);
}
/* Free SG tables */
static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
{
int i;
const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
kfree(acb->srb_array[i].segment_x);
}
/*
* Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
* should never cross a page boundary */
static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
{
const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
*SEGMENTX_LEN;
int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
int srb_idx = 0;
unsigned i = 0;
struct SGentry *ptr;
for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
acb->srb_array[i].segment_x = NULL;
dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
while (pages--) {
ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!ptr) {
adapter_sg_tables_free(acb);
return 1;
}
dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
PAGE_SIZE, ptr, srb_idx);
i = 0;
while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
acb->srb_array[srb_idx++].segment_x =
ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
}
if (i < srbs_per_page)
acb->srb.segment_x =
ptr + (i * DC395x_MAX_SG_LISTENTRY);
else
dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
return 0;
}
/**
* adapter_print_config - print adapter connection and termination
* config
*
* The io port in the adapter needs to have been set before calling
* this function.
*
* @acb: The adapter to print the information for.
**/
static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
{
u8 bval;
bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
dprintkl(KERN_INFO, "%sConnectors: ",
((bval & WIDESCSI) ? "(Wide) " : ""));
if (!(bval & CON5068))
printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
if (!(bval & CON68))
printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
if (!(bval & CON50))
printk("int50 ");
if ((bval & (CON5068 | CON50 | CON68)) ==
0 /*(CON5068 | CON50 | CON68) */ )
printk(" Oops! (All 3?) ");
bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
printk(" Termination: ");
if (bval & DIS_TERM)
printk("Disabled\n");
else {
if (bval & AUTOTERM)
printk("Auto ");
if (bval & LOW8TERM)
printk("Low ");
if (bval & UP8TERM)
printk("High ");
printk("\n");
}
}
/**
* adapter_init_params - Initialize the various parameters in the
* adapter structure. Note that the pointer to the scsi_host is set
* early (when this instance is created) and the io_port and irq
* values are set later after they have been reserved. This just gets
* everything set to a good starting position.
*
* The eeprom structure in the adapter needs to have been set before
* calling this function.
*
* @acb: The adapter to initialize.
**/
static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
{
struct NvRamType *eeprom = &acb->eeprom;
int i;
/* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
/* NOTE: acb->io_port_base is set at port registration time */
/* NOTE: acb->io_port_len is set at port registration time */
INIT_LIST_HEAD(&acb->dcb_list);
acb->dcb_run_robin = NULL;
acb->active_dcb = NULL;
INIT_LIST_HEAD(&acb->srb_free_list);
/* temp SRB for Q tag used or abort command used */
acb->tmp_srb = &acb->srb;
init_timer(&acb->waiting_timer);
init_timer(&acb->selto_timer);
acb->srb_count = DC395x_MAX_SRB_CNT;
acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */
/* NOTE: acb->irq_level is set at IRQ registration time */
acb->tag_max_num = 1 << eeprom->max_tag;
if (acb->tag_max_num > 30)
acb->tag_max_num = 30;
acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */
acb->gmode2 = eeprom->channel_cfg;
acb->config = 0; /* NOTE: actually set in adapter_init_chip */
if (eeprom->channel_cfg & NAC_SCANLUN)
acb->lun_chk = 1;
acb->scan_devices = 1;
acb->scsi_host->this_id = eeprom->scsi_id;
acb->hostid_bit = (1 << acb->scsi_host->this_id);
for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
acb->dcb_map[i] = 0;
acb->msg_len = 0;
/* link static array of srbs into the srb free list */
for (i = 0; i < acb->srb_count - 1; i++)
srb_free_insert(acb, &acb->srb_array[i]);
}
/**
* adapter_init_host - Initialize the scsi host instance based on
* values that we have already stored in the adapter instance. There's
* some mention that a lot of these are deprecated, so we won't use
* them (we'll use the ones in the adapter instance) but we'll fill
* them in in case something else needs them.
*
* The eeprom structure, irq and io ports in the adapter need to have
* been set before calling this function.
*
* @host: The scsi host instance to fill in the values for.
**/
static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
{
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
struct NvRamType *eeprom = &acb->eeprom;
host->max_cmd_len = 24;
host->can_queue = DC395x_MAX_CMD_QUEUE;
host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
host->this_id = (int)eeprom->scsi_id;
host->io_port = acb->io_port_base;
host->n_io_port = acb->io_port_len;
host->dma_channel = -1;
host->unique_id = acb->io_port_base;
host->irq = acb->irq_level;
host->last_reset = jiffies;
host->max_id = 16;
if (host->max_id - 1 == eeprom->scsi_id)
host->max_id--;
#ifdef CONFIG_SCSI_MULTI_LUN
if (eeprom->channel_cfg & NAC_SCANLUN)
host->max_lun = 8;
else
host->max_lun = 1;
#else
host->max_lun = 1;
#endif
}
/**
* adapter_init_chip - Get the chip into a know state and figure out
* some of the settings that apply to this adapter.
*
* The io port in the adapter needs to have been set before calling
* this function. The config will be configured correctly on return.
*
* @acb: The adapter which we are to init.
**/
static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
{
struct NvRamType *eeprom = &acb->eeprom;
/* Mask all the interrupt */
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
/* Reset SCSI module */
DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
/* Reset PCI/DMA module */
DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
udelay(20);
/* program configuration 0 */
acb->config = HCC_AUTOTERM | HCC_PARITY;
if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
acb->config |= HCC_WIDE_CARD;
if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
acb->config |= HCC_SCSI_RESET;
if (acb->config & HCC_SCSI_RESET) {
dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);
/*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
/*spin_unlock_irq (&io_request_lock); */
udelay(500);
acb->scsi_host->last_reset =
jiffies + HZ / 2 +
HZ * acb->eeprom.delay_time;
/*spin_lock_irq (&io_request_lock); */
}
}
/**
* init_adapter - Grab the resource for the card, setup the adapter
* information, set the card into a known state, create the various
* tables etc etc. This basically gets all adapter information all up
* to date, intialised and gets the chip in sync with it.
*
* @host: This hosts adapter structure
* @io_port: The base I/O port
* @irq: IRQ
*
* Returns 0 if the initialization succeeds, any other value on
* failure.
**/
static int __devinit adapter_init(struct AdapterCtlBlk *acb,
unsigned long io_port, u32 io_port_len, unsigned int irq)
{
if (!request_region(io_port, io_port_len, DC395X_NAME)) {
dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
goto failed;
}
/* store port base to indicate we have registered it */
acb->io_port_base = io_port;
acb->io_port_len = io_port_len;
if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
/* release the region we just claimed */
dprintkl(KERN_INFO, "Failed to register IRQ\n");
goto failed;
}
/* store irq to indicate we have registered it */
acb->irq_level = irq;
/* get eeprom configuration information and command line settings etc */
check_eeprom(&acb->eeprom, io_port);
print_eeprom_settings(&acb->eeprom);
/* setup adapter control block */
adapter_init_params(acb);
/* display card connectors/termination settings */
adapter_print_config(acb);
if (adapter_sg_tables_alloc(acb)) {
dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
goto failed;
}
adapter_init_scsi_host(acb->scsi_host);
adapter_init_chip(acb);
set_basic_config(acb);
dprintkdbg(DBG_0,
"adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
"size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
return 0;
failed:
if (acb->irq_level)
free_irq(acb->irq_level, acb);
if (acb->io_port_base)
release_region(acb->io_port_base, acb->io_port_len);
adapter_sg_tables_free(acb);
return 1;
}
/**
* adapter_uninit_chip - cleanly shut down the scsi controller chip,
* stopping all operations and disabling interrupt generation on the
* card.
*
* @acb: The adapter which we are to shutdown.
**/
static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
{
/* disable interrupts */
DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);
/* reset the scsi bus */
if (acb->config & HCC_SCSI_RESET)
reset_scsi_bus(acb);
/* clear any pending interupt state */
DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
}
/**
* adapter_uninit - Shut down the chip and release any resources that
* we had allocated. Once this returns the adapter should not be used
* anymore.
*
* @acb: The adapter which we are to un-initialize.
**/
static void adapter_uninit(struct AdapterCtlBlk *acb)
{
unsigned long flags;
DC395x_LOCK_IO(acb->scsi_host, flags);
/* remove timers */
if (timer_pending(&acb->waiting_timer))
del_timer(&acb->waiting_timer);
if (timer_pending(&acb->selto_timer))
del_timer(&acb->selto_timer);
adapter_uninit_chip(acb);
adapter_remove_and_free_all_devices(acb);
DC395x_UNLOCK_IO(acb->scsi_host, flags);
if (acb->irq_level)
free_irq(acb->irq_level, acb);
if (acb->io_port_base)
release_region(acb->io_port_base, acb->io_port_len);
adapter_sg_tables_free(acb);
}
#undef SPRINTF
#define SPRINTF(args...) pos += sprintf(pos, args)
#undef YESNO
#define YESNO(YN) \
if (YN) SPRINTF(" Yes ");\
else SPRINTF(" No ")
static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
char **start, off_t offset, int length, int inout)
{
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
int spd, spd1;
char *pos = buffer;
struct DeviceCtlBlk *dcb;
unsigned long flags;
int dev;
if (inout) /* Has data been written to the file ? */
return -EPERM;
SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
SPRINTF(" Driver Version " DC395X_VERSION "\n");
DC395x_LOCK_IO(acb->scsi_host, flags);
SPRINTF("SCSI Host Nr %i, ", host->host_no);
SPRINTF("DC395U/UW/F DC315/U %s\n",
(acb->config & HCC_WIDE_CARD) ? "Wide" : "");
SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
SPRINTF("irq_level 0x%04x, ", acb->irq_level);
SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);
SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
SPRINTF("AdapterID %i\n", host->this_id);
SPRINTF("tag_max_num %i", acb->tag_max_num);
/*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
SPRINTF(", FilterCfg 0x%02x",
DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
/*SPRINTF("\n"); */
SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
SPRINTF
("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
acb->dcb_map[6], acb->dcb_map[7]);
SPRINTF
(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
acb->dcb_map[14], acb->dcb_map[15]);
SPRINTF
("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");
dev = 0;
list_for_each_entry(dcb, &acb->dcb_list, list) {
int nego_period;
SPRINTF("%02i %02i %02i ", dev, dcb->target_id,
dcb->target_lun);
YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
YESNO(dcb->sync_offset);
YESNO(dcb->sync_period & WIDE_SYNC);
YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
YESNO(dcb->dev_mode & NTC_DO_SEND_START);
YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
nego_period = clock_period[dcb->sync_period & 0x07] << 2;
if (dcb->sync_offset)
SPRINTF(" %03i ns ", nego_period);
else
SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));
if (dcb->sync_offset & 0x0f) {
spd = 1000 / (nego_period);
spd1 = 1000 % (nego_period);
spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
SPRINTF(" %2i.%1i M %02i ", spd, spd1,
(dcb->sync_offset & 0x0f));
} else
SPRINTF(" ");
/* Add more info ... */
SPRINTF(" %02i\n", dcb->max_command);
dev++;
}
if (timer_pending(&acb->waiting_timer))
SPRINTF("Waiting queue timer running\n");
else
SPRINTF("\n");
list_for_each_entry(dcb, &acb->dcb_list, list) {
struct ScsiReqBlk *srb;
if (!list_empty(&dcb->srb_waiting_list))
SPRINTF("DCB (%02i-%i): Waiting: %i:",
dcb->target_id, dcb->target_lun,
list_size(&dcb->srb_waiting_list));
list_for_each_entry(srb, &dcb->srb_waiting_list, list)
SPRINTF(" %li", srb->cmd->pid);
if (!list_empty(&dcb->srb_going_list))
SPRINTF("\nDCB (%02i-%i): Going : %i:",
dcb->target_id, dcb->target_lun,
list_size(&dcb->srb_going_list));
list_for_each_entry(srb, &dcb->srb_going_list, list)
SPRINTF(" %li", srb->cmd->pid);
if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
SPRINTF("\n");
}
if (debug_enabled(DBG_1)) {
SPRINTF("DCB list for ACB %p:\n", acb);
list_for_each_entry(dcb, &acb->dcb_list, list) {
SPRINTF("%p -> ", dcb);
}
SPRINTF("END\n");
}
*start = buffer + offset;
DC395x_UNLOCK_IO(acb->scsi_host, flags);
if (pos - buffer < offset)
return 0;
else if (pos - buffer - offset < length)
return pos - buffer - offset;
else
return length;
}
static struct scsi_host_template dc395x_driver_template = {
.module = THIS_MODULE,
.proc_name = DC395X_NAME,
.proc_info = dc395x_proc_info,
.name = DC395X_BANNER " " DC395X_VERSION,
.queuecommand = dc395x_queue_command,
.bios_param = dc395x_bios_param,
.slave_alloc = dc395x_slave_alloc,
.slave_destroy = dc395x_slave_destroy,
.can_queue = DC395x_MAX_CAN_QUEUE,
.this_id = 7,
.sg_tablesize = DC395x_MAX_SG_TABLESIZE,
.cmd_per_lun = DC395x_MAX_CMD_PER_LUN,
.eh_abort_handler = dc395x_eh_abort,
.eh_bus_reset_handler = dc395x_eh_bus_reset,
.unchecked_isa_dma = 0,
.use_clustering = DISABLE_CLUSTERING,
};
/**
* banner_display - Display banner on first instance of driver
* initialized.
**/
static void banner_display(void)
{
static int banner_done = 0;
if (!banner_done)
{
dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
banner_done = 1;
}
}
/**
* dc395x_init_one - Initialise a single instance of the adapter.
*
* The PCI layer will call this once for each instance of the adapter
* that it finds in the system. The pci_dev strcuture indicates which
* instance we are being called from.
*
* @dev: The PCI device to intialize.
* @id: Looks like a pointer to the entry in our pci device table
* that was actually matched by the PCI subsystem.
*
* Returns 0 on success, or an error code (-ve) on failure.
**/
static int __devinit dc395x_init_one(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct Scsi_Host *scsi_host = NULL;
struct AdapterCtlBlk *acb = NULL;
unsigned long io_port_base;
unsigned int io_port_len;
unsigned int irq;
dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
banner_display();
if (pci_enable_device(dev))
{
dprintkl(KERN_INFO, "PCI Enable device failed.\n");
return -ENODEV;
}
io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
io_port_len = pci_resource_len(dev, 0);
irq = dev->irq;
dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);
/* allocate scsi host information (includes out adapter) */
scsi_host = scsi_host_alloc(&dc395x_driver_template,
sizeof(struct AdapterCtlBlk));
if (!scsi_host) {
dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
goto fail;
}
acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
acb->scsi_host = scsi_host;
acb->dev = dev;
/* initialise the adapter and everything we need */
if (adapter_init(acb, io_port_base, io_port_len, irq)) {
dprintkl(KERN_INFO, "adapter init failed\n");
goto fail;
}
pci_set_master(dev);
/* get the scsi mid level to scan for new devices on the bus */
if (scsi_add_host(scsi_host, &dev->dev)) {
dprintkl(KERN_ERR, "scsi_add_host failed\n");
goto fail;
}
pci_set_drvdata(dev, scsi_host);
scsi_scan_host(scsi_host);
return 0;
fail:
if (acb != NULL)
adapter_uninit(acb);
if (scsi_host != NULL)
scsi_host_put(scsi_host);
pci_disable_device(dev);
return -ENODEV;
}
/**
* dc395x_remove_one - Called to remove a single instance of the
* adapter.
*
* @dev: The PCI device to intialize.
**/
static void __devexit dc395x_remove_one(struct pci_dev *dev)
{
struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);
dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);
scsi_remove_host(scsi_host);
adapter_uninit(acb);
pci_disable_device(dev);
scsi_host_put(scsi_host);
pci_set_drvdata(dev, NULL);
}
static struct pci_device_id dc395x_pci_table[] = {
{
.vendor = PCI_VENDOR_ID_TEKRAM,
.device = PCI_DEVICE_ID_TEKRAM_TRMS1040,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, dc395x_pci_table);
static struct pci_driver dc395x_driver = {
.name = DC395X_NAME,
.id_table = dc395x_pci_table,
.probe = dc395x_init_one,
.remove = __devexit_p(dc395x_remove_one),
};
/**
* dc395x_module_init - Module initialization function
*
* Used by both module and built-in driver to initialise this driver.
**/
static int __init dc395x_module_init(void)
{
return pci_register_driver(&dc395x_driver);
}
/**
* dc395x_module_exit - Module cleanup function.
**/
static void __exit dc395x_module_exit(void)
{
pci_unregister_driver(&dc395x_driver);
}
module_init(dc395x_module_init);
module_exit(dc395x_module_exit);
MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
MODULE_LICENSE("GPL");
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