forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
4717 lines
136 KiB
4717 lines
136 KiB
/* |
|
* 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 <[email protected]> |
|
* Erich Chen <[email protected]> |
|
* (C) Copyright 1995-1999 Tekram Technology Co., Ltd. |
|
* |
|
* Kurt Garloff <[email protected]> |
|
* (C) 1999-2000 Kurt Garloff |
|
* |
|
* Oliver Neukum <[email protected]> |
|
* Ali Akcaagac <[email protected]> |
|
* Jamie Lenehan <[email protected]> |
|
* (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 <linux/slab.h> |
|
#include <asm/io.h> |
|
|
|
#include <scsi/scsi.h> |
|
#include <scsi/scsi_cmnd.h> |
|
#include <scsi/scsi_device.h> |
|
#include <scsi/scsi_host.h> |
|
#include <scsi/scsi_transport_spi.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 transferred */ |
|
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; |
|
|
|
unsigned long last_reset; |
|
|
|
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(struct timer_list *t); |
|
|
|
|
|
/*--------------------------------------------------------------------------- |
|
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 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, |
|
NAC_SCANLUN | |
|
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 BIOS/default values with |
|
* command line overrides will be used. If set to 1 then safe and |
|
* slow settings will be used. |
|
*/ |
|
static bool 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 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 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 number of actual seconds that the delay should be for. |
|
*/ |
|
static char 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 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 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 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; |
|
} |
|
|
|
/* 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; |
|
if (time_before(jiffies + to, acb->last_reset - HZ / 2)) |
|
acb->waiting_timer.expires = |
|
acb->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)) |
|
list_move(&srb->list, &pos->srb_going_list); |
|
else |
|
waiting_set_timer(acb, HZ/50); |
|
break; |
|
} |
|
} while (pos != start); |
|
} |
|
|
|
|
|
/* Wake up waiting queue */ |
|
static void waiting_timeout(struct timer_list *t) |
|
{ |
|
unsigned long flags; |
|
struct AdapterCtlBlk *acb = from_timer(acb, t, waiting_timer); |
|
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))) { |
|
list_add_tail(&srb->list, &dcb->srb_waiting_list); |
|
waiting_process_next(acb); |
|
return; |
|
} |
|
|
|
if (!start_scsi(acb, dcb, srb)) { |
|
list_add_tail(&srb->list, &dcb->srb_going_list); |
|
} else { |
|
list_add(&srb->list, &dcb->srb_waiting_list); |
|
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) |
|
{ |
|
int nseg; |
|
enum dma_data_direction dir = cmd->sc_data_direction; |
|
dprintkdbg(DBG_0, "build_srb: (0x%p) <%02i-%i>\n", |
|
cmd, 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; |
|
|
|
nseg = scsi_dma_map(cmd); |
|
BUG_ON(nseg < 0); |
|
|
|
if (dir == DMA_NONE || !nseg) { |
|
dprintkdbg(DBG_0, |
|
"build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", |
|
cmd->bufflen, scsi_sglist(cmd), scsi_sg_count(cmd), |
|
srb->segment_x[0].address); |
|
} else { |
|
int i; |
|
u32 reqlen = scsi_bufflen(cmd); |
|
struct scatterlist *sg; |
|
struct SGentry *sgp = srb->segment_x; |
|
|
|
srb->sg_count = nseg; |
|
|
|
dprintkdbg(DBG_0, |
|
"build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", |
|
reqlen, scsi_sglist(cmd), scsi_sg_count(cmd), |
|
srb->sg_count); |
|
|
|
scsi_for_each_sg(cmd, sg, srb->sg_count, i) { |
|
u32 busaddr = (u32)sg_dma_address(sg); |
|
u32 seglen = (u32)sg->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 = dma_map_single(&dcb->acb->dev->dev, |
|
srb->segment_x, SEGMENTX_LEN, DMA_TO_DEVICE); |
|
|
|
dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", |
|
srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); |
|
} |
|
|
|
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_lck(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: (0x%p) <%02i-%i> cmnd=0x%02x\n", |
|
cmd, cmd->device->id, (u8)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, (u8)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, (u8)cmd->device->lun); |
|
goto complete; |
|
} |
|
|
|
/* set callback and clear result in the command */ |
|
cmd->scsi_done = done; |
|
cmd->result = 0; |
|
|
|
srb = list_first_entry_or_null(&acb->srb_free_list, |
|
struct ScsiReqBlk, list); |
|
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; |
|
} |
|
list_del(&srb->list); |
|
|
|
build_srb(cmd, dcb, srb); |
|
|
|
if (!list_empty(&dcb->srb_waiting_list)) { |
|
/* append to waiting queue */ |
|
list_add_tail(&srb->list, &dcb->srb_waiting_list); |
|
waiting_process_next(acb); |
|
} else { |
|
/* process immediately */ |
|
send_srb(acb, srb); |
|
} |
|
dprintkdbg(DBG_1, "queue_command: (0x%p) done\n", cmd); |
|
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; |
|
} |
|
|
|
static DEF_SCSI_QCMD(dc395x_queue_command) |
|
|
|
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 " |
|
"cmnd=0x%02x <%02i-%i>\n", |
|
srb, srb->cmd, |
|
srb->cmd->cmnd[0], srb->cmd->device->id, |
|
(u8)srb->cmd->device->lun); |
|
printk(" sglist=%p cnt=%i idx=%i len=%zu\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: (0%p) target=<%02i-%i> cmd=%p\n", |
|
cmd, cmd->device->id, (u8)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->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: (0x%p) target=<%02i-%i> cmd=%p\n", |
|
cmd, cmd->device->id, (u8)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) { |
|
list_del(&srb->list); |
|
pci_unmap_srb_sense(acb, srb); |
|
pci_unmap_srb(acb, srb); |
|
free_tag(dcb, srb); |
|
list_add_tail(&srb->list, &acb->srb_free_list); |
|
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; |
|
|
|
srb->msg_count += spi_populate_sync_msg(ptr, dcb->min_nego_period, |
|
dcb->sync_offset); |
|
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; |
|
} |
|
srb->msg_count += spi_populate_width_msg(ptr, wide); |
|
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->last_reset + HZ / 2)) |
|
acb->selto_timer.expires = |
|
acb->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 __maybe_unused s_stat2, return_code; |
|
u8 s_stat, scsicommand, i, identify_message; |
|
u8 *ptr; |
|
dprintkdbg(DBG_0, "start_scsi: (0x%p) <%02i-%i> srb=%p\n", |
|
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: (0x%p) BUSY %02x %04x\n", |
|
s_stat, s_stat2); |
|
/* |
|
* Try anyway? |
|
* |
|
* We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection |
|
* Timeout, a Disconnect or a Reselection 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: (0x%p) Attempt to start a" |
|
"command while another command (0x%p) is active.", |
|
srb->cmd, |
|
acb->active_dcb->active_srb ? |
|
acb->active_dcb->active_srb->cmd : 0); |
|
return 1; |
|
} |
|
if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { |
|
dprintkdbg(DBG_KG, "start_scsi: (0x%p) Failed (busy)\n", srb->cmd); |
|
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->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: (0x%p) " |
|
"Out of tags target=<%02i-%i>)\n", |
|
srb->cmd, srb->cmd->device->id, |
|
(u8)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, SIMPLE_QUEUE_TAG); |
|
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: (0x%p) <%02i-%i> cmnd=0x%02x tag=%i\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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, SCSI_SENSE_BUFFERSIZE); |
|
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: (0x%p) <%02i-%i> Failed - busy\n", |
|
srb->cmd, 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 occurred 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 = dev_id; |
|
u16 scsi_status; |
|
u8 dma_status; |
|
irqreturn_t handled = IRQ_NONE; |
|
|
|
/* |
|
* Check for pending interrupt |
|
*/ |
|
scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); |
|
dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
|
if (scsi_status & SCSIINTERRUPT) { |
|
/* interrupt 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: (0x%p)\n", srb->cmd); |
|
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: (0x%p)\n", srb->cmd); |
|
|
|
clear_fifo(acb, "msgout_phase1"); |
|
if (!(srb->state & SRB_MSGOUT)) { |
|
srb->state |= SRB_MSGOUT; |
|
dprintkl(KERN_DEBUG, |
|
"msgout_phase1: (0x%p) Phase unexpected\n", |
|
srb->cmd); /* So what ? */ |
|
} |
|
if (!srb->msg_count) { |
|
dprintkdbg(DBG_0, "msgout_phase1: (0x%p) NOP msg\n", |
|
srb->cmd); |
|
DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 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] == ABORT_TASK_SET) |
|
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: (0x%p)\n", srb->cmd); |
|
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: (0x%p)\n", srb->cmd); |
|
|
|
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, SCSI_SENSE_BUFFERSIZE); |
|
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 transferred */ |
|
struct SGentry *psge = srb->segment_x + srb->sg_index; |
|
|
|
dprintkdbg(DBG_0, |
|
"sg_update_list: Transferred %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 */ |
|
dma_sync_single_for_cpu(&srb->dcb->acb->dev->dev, |
|
srb->sg_bus_addr, SEGMENTX_LEN, |
|
DMA_TO_DEVICE); |
|
psge->length -= xferred; |
|
psge->address += xferred; |
|
srb->sg_index = idx; |
|
dma_sync_single_for_device(&srb->dcb->acb->dev->dev, |
|
srb->sg_bus_addr, SEGMENTX_LEN, |
|
DMA_TO_DEVICE); |
|
break; |
|
} |
|
psge++; |
|
} |
|
sg_verify_length(srb); |
|
} |
|
|
|
|
|
/* |
|
* We have transferred 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 transferred 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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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 |
|
&& scsi_bufflen(srb->cmd) % 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 && scsi_sg_count(srb->cmd)) |
|
|| ((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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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: (0x%p) " |
|
"Parity Error\n", srb->cmd); |
|
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 transferred 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; |
|
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(scsi_sglist(srb->cmd), |
|
srb->sg_count, &offset, &len); |
|
virt = base + offset; |
|
|
|
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); |
|
} |
|
|
|
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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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: (0x%p) <%02i-%i> %c len=%i, sg=(%i/%i)\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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 (scsi_sg_count(srb->cmd)) { /* 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; |
|
size_t offset = srb->request_length - left_io; |
|
|
|
local_irq_save(flags); |
|
/* Again, max 4 bytes */ |
|
base = scsi_kmap_atomic_sg(scsi_sglist(srb->cmd), |
|
srb->sg_count, &offset, &len); |
|
virt = base + offset; |
|
|
|
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); |
|
} |
|
|
|
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 */ |
|
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) { |
|
DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
|
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) |
|
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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, srb->cmd->device->id, (u8)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: (0x%p) tag=%i srb=%p\n", |
|
srb->cmd, 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: (0x%p) <%02i-%i>\n", |
|
srb->cmd, 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] = ABORT_TASK; |
|
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: (0x%p)\n", srb->cmd); |
|
|
|
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 IGNORE_WIDE_RESIDUE: |
|
/* 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: (0x%p) " |
|
"SAVE POINTER rem=%i Ignore\n", |
|
srb->cmd, 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: (0x%p) " |
|
"<%02i-%i> ABORT msg\n", |
|
srb->cmd, 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: (0x%p)\n", srb->cmd); |
|
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->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: (0x%p)\n", srb->cmd); |
|
|
|
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->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: (0x%p) Unexpected\n", |
|
srb->cmd); |
|
srb->target_status = SCSI_STAT_SEL_TIMEOUT; |
|
goto disc1; |
|
} else { |
|
/* Normal selection timeout */ |
|
dprintkdbg(DBG_KG, "disconnect: (0x%p) " |
|
"<%02i-%i> SelTO\n", srb->cmd, |
|
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); |
|
list_move(&srb->list, &dcb->srb_waiting_list); |
|
dprintkdbg(DBG_KG, |
|
"disconnect: (0x%p) Retry\n", |
|
srb->cmd); |
|
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; |
|
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: (0x%p) <%02i-%i> " |
|
"Arb lost but Resel win rsel=%i stat=0x%04x\n", |
|
srb->cmd, dcb->target_id, |
|
dcb->target_lun, rsel_tar_lun_id, |
|
DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); |
|
/*srb->state |= SRB_DISCONNECT; */ |
|
|
|
srb->state = SRB_READY; |
|
free_tag(dcb, srb); |
|
list_move(&srb->list, &dcb->srb_waiting_list); |
|
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) { |
|
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 (scsi_sg_count(cmd) && dir != DMA_NONE) { |
|
/* unmap DC395x SG list */ |
|
dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", |
|
srb->sg_bus_addr, SEGMENTX_LEN); |
|
dma_unmap_single(&acb->dev->dev, srb->sg_bus_addr, SEGMENTX_LEN, |
|
DMA_TO_DEVICE); |
|
dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", |
|
scsi_sg_count(cmd), scsi_bufflen(cmd)); |
|
/* unmap the sg segments */ |
|
scsi_dma_unmap(cmd); |
|
} |
|
} |
|
|
|
|
|
/* 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); |
|
dma_unmap_single(&acb->dev->dev, srb->segment_x[0].address, |
|
srb->segment_x[0].length, DMA_FROM_DEVICE); |
|
/* 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: (0x%p) <%02i-%i>\n", srb->cmd, |
|
srb->cmd->device->id, (u8)srb->cmd->device->lun); |
|
dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n", |
|
srb, scsi_sg_count(cmd), srb->sg_index, srb->sg_count, |
|
scsi_sgtalbe(cmd)); |
|
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); |
|
list_move(&srb->list, &dcb->srb_waiting_list); |
|
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); |
|
} |
|
} |
|
|
|
ckc_only = 0; |
|
/* Check Error Conditions */ |
|
ckc_e: |
|
|
|
pci_unmap_srb(acb, srb); |
|
|
|
if (cmd->cmnd[0] == INQUIRY) { |
|
unsigned char *base = NULL; |
|
struct ScsiInqData *ptr; |
|
unsigned long flags = 0; |
|
struct scatterlist* sg = scsi_sglist(cmd); |
|
size_t offset = 0, len = sizeof(struct ScsiInqData); |
|
|
|
local_irq_save(flags); |
|
base = scsi_kmap_atomic_sg(sg, scsi_sg_count(cmd), &offset, &len); |
|
ptr = (struct ScsiInqData *)(base + offset); |
|
|
|
if (!ckc_only && (cmd->result & RES_DID) == 0 |
|
&& cmd->cmnd[2] == 0 && scsi_bufflen(cmd) >= 8 |
|
&& dir != 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; |
|
} |
|
} |
|
|
|
scsi_kunmap_atomic_sg(base); |
|
local_irq_restore(flags); |
|
} |
|
|
|
/* Here is the info for Doug Gilbert's sg3 ... */ |
|
scsi_set_resid(cmd, 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: (0x%p) <%02i-%i> " |
|
"cmnd=0x%02x Missed %i bytes\n", |
|
cmd, cmd->device->id, (u8)cmd->device->lun, |
|
cmd->cmnd[0], srb->total_xfer_length); |
|
} |
|
|
|
if (srb != acb->tmp_srb) { |
|
/* Add to free list */ |
|
dprintkdbg(DBG_0, "srb_done: (0x%p) done result=0x%08x\n", |
|
cmd, cmd->result); |
|
list_move_tail(&srb->list, &acb->srb_free_list); |
|
} else { |
|
dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); |
|
} |
|
|
|
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) { |
|
int result; |
|
|
|
p = srb->cmd; |
|
result = MK_RES(0, did_flag, 0, 0); |
|
printk("G:%p(%02i-%i) ", p, |
|
p->device->id, (u8)p->device->lun); |
|
list_del(&srb->list); |
|
free_tag(dcb, srb); |
|
list_add_tail(&srb->list, &acb->srb_free_list); |
|
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:%p<%02i-%i>", p, p->device->id, |
|
(u8)p->device->lun); |
|
list_move_tail(&srb->list, &acb->srb_free_list); |
|
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->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: (0x%p) <%02i-%i>\n", |
|
cmd, cmd->device->id, (u8)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, SCSI_SENSE_BUFFERSIZE); |
|
|
|
/* 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 = SCSI_SENSE_BUFFERSIZE; |
|
srb->segment_x[0].length = SCSI_SENSE_BUFFERSIZE; |
|
/* Map sense buffer */ |
|
srb->segment_x[0].address = dma_map_single(&acb->dev->dev, |
|
cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE, |
|
DMA_FROM_DEVICE); |
|
dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", |
|
cmd->sense_buffer, srb->segment_x[0].address, |
|
SCSI_SENSE_BUFFERSIZE); |
|
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: (0x%p) failed <%02i-%i>\n", |
|
srb->cmd, dcb->target_id, dcb->target_lun); |
|
list_move(&srb->list, &dcb->srb_waiting_list); |
|
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; |
|
dcb->dev_mode = eeprom->target[target].cfg0; |
|
#ifndef DC395x_NO_DISCONNECT |
|
dcb->identify_msg = |
|
IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); |
|
#else |
|
dcb->identify_msg = IDENTIFY(0, lun); |
|
#endif |
|
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 initialised 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 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 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 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 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 byte read. |
|
**/ |
|
static u8 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 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 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 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 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 = 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 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 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; |
|
timer_setup(&acb->waiting_timer, waiting_timeout, 0); |
|
timer_setup(&acb->selto_timer, NULL, 0); |
|
|
|
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++) |
|
list_add_tail(&acb->srb_array[i].list, &acb->srb_free_list); |
|
} |
|
|
|
|
|
/** |
|
* 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 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; |
|
acb->last_reset = jiffies; |
|
|
|
host->max_id = 16; |
|
if (host->max_id - 1 == eeprom->scsi_id) |
|
host->max_id--; |
|
|
|
if (eeprom->channel_cfg & NAC_SCANLUN) |
|
host->max_lun = 8; |
|
else |
|
host->max_lun = 1; |
|
} |
|
|
|
|
|
/** |
|
* 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 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->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, initialised 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 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 interrupt 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 YESNO |
|
#define YESNO(YN) \ |
|
if (YN) seq_printf(m, " Yes ");\ |
|
else seq_printf(m, " No ") |
|
|
|
static int dc395x_show_info(struct seq_file *m, struct Scsi_Host *host) |
|
{ |
|
struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; |
|
int spd, spd1; |
|
struct DeviceCtlBlk *dcb; |
|
unsigned long flags; |
|
int dev; |
|
|
|
seq_puts(m, DC395X_BANNER " PCI SCSI Host Adapter\n" |
|
" Driver Version " DC395X_VERSION "\n"); |
|
|
|
DC395x_LOCK_IO(acb->scsi_host, flags); |
|
|
|
seq_printf(m, "SCSI Host Nr %i, ", host->host_no); |
|
seq_printf(m, "DC395U/UW/F DC315/U %s\n", |
|
(acb->config & HCC_WIDE_CARD) ? "Wide" : ""); |
|
seq_printf(m, "io_port_base 0x%04lx, ", acb->io_port_base); |
|
seq_printf(m, "irq_level 0x%04x, ", acb->irq_level); |
|
seq_printf(m, " SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); |
|
|
|
seq_printf(m, "MaxID %i, MaxLUN %llu, ", host->max_id, host->max_lun); |
|
seq_printf(m, "AdapterID %i\n", host->this_id); |
|
|
|
seq_printf(m, "tag_max_num %i", acb->tag_max_num); |
|
/*seq_printf(m, ", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ |
|
seq_printf(m, ", FilterCfg 0x%02x", |
|
DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); |
|
seq_printf(m, ", DelayReset %is\n", acb->eeprom.delay_time); |
|
/*seq_printf(m, "\n"); */ |
|
|
|
seq_printf(m, "Nr of DCBs: %i\n", list_size(&acb->dcb_list)); |
|
seq_printf(m, "Map of attached LUNs: %8ph\n", &acb->dcb_map[0]); |
|
seq_printf(m, " %8ph\n", &acb->dcb_map[8]); |
|
|
|
seq_puts(m, |
|
"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; |
|
seq_printf(m, "%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) |
|
seq_printf(m, " %03i ns ", nego_period); |
|
else |
|
seq_printf(m, " (%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); |
|
seq_printf(m, " %2i.%1i M %02i ", spd, spd1, |
|
(dcb->sync_offset & 0x0f)); |
|
} else |
|
seq_puts(m, " "); |
|
|
|
/* Add more info ... */ |
|
seq_printf(m, " %02i\n", dcb->max_command); |
|
dev++; |
|
} |
|
|
|
if (timer_pending(&acb->waiting_timer)) |
|
seq_puts(m, "Waiting queue timer running\n"); |
|
else |
|
seq_putc(m, '\n'); |
|
|
|
list_for_each_entry(dcb, &acb->dcb_list, list) { |
|
struct ScsiReqBlk *srb; |
|
if (!list_empty(&dcb->srb_waiting_list)) |
|
seq_printf(m, "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) |
|
seq_printf(m, " %p", srb->cmd); |
|
if (!list_empty(&dcb->srb_going_list)) |
|
seq_printf(m, "\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) |
|
seq_printf(m, " %p", srb->cmd); |
|
if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) |
|
seq_putc(m, '\n'); |
|
} |
|
|
|
if (debug_enabled(DBG_1)) { |
|
seq_printf(m, "DCB list for ACB %p:\n", acb); |
|
list_for_each_entry(dcb, &acb->dcb_list, list) { |
|
seq_printf(m, "%p -> ", dcb); |
|
} |
|
seq_puts(m, "END\n"); |
|
} |
|
|
|
DC395x_UNLOCK_IO(acb->scsi_host, flags); |
|
return 0; |
|
} |
|
|
|
|
|
static struct scsi_host_template dc395x_driver_template = { |
|
.module = THIS_MODULE, |
|
.proc_name = DC395X_NAME, |
|
.show_info = dc395x_show_info, |
|
.name = DC395X_BANNER " " DC395X_VERSION, |
|
.queuecommand = dc395x_queue_command, |
|
.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, |
|
.dma_boundary = PAGE_SIZE - 1, |
|
}; |
|
|
|
|
|
/** |
|
* 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 initialize. |
|
* @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 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 initialize. |
|
**/ |
|
static void 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); |
|
} |
|
|
|
|
|
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 = dc395x_remove_one, |
|
}; |
|
module_pci_driver(dc395x_driver); |
|
|
|
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");
|
|
|