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linux/drivers/scsi/ibmmca.c
Adrian Bunk a6becb084d [SCSI] ibmmca: fix a NULL pointer dereference 
The variable was dereferenced only if it was NULL (sic)...

Spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2006-03-12 09:46:11 -06:00

2513 lines
95 KiB
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/*
Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
Linux Kernel >= 2.4.0.
Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
General Public License. Written by Martin Kolinek, December 1995.
Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
See the file Documentation/scsi/ibmmca.txt for a detailed description
of this driver, the commandline arguments and the history of its
development.
See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
updates, info and ADF-files for adapters supported by this driver.
Alan Cox <alan@redhat.com>
Updated for Linux 2.5.45 to use the new error handler, cleaned up the
lock macros and did a few unavoidable locking tweaks, plus one locking
fix in the irq and completion path.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/mca.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/mca-legacy.h>
#include <asm/system.h>
#include <asm/io.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "ibmmca.h"
/* current version of this driver-source: */
#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
/* driver configuration */
#define IM_MAX_HOSTS 8 /* maximum number of host adapters */
#define IM_RESET_DELAY 60 /* seconds allowed for a reset */
/* driver debugging - #undef all for normal operation */
/* if defined: count interrupts and ignore this special one: */
#undef IM_DEBUG_TIMEOUT //50
#define TIMEOUT_PUN 0
#define TIMEOUT_LUN 0
/* verbose interrupt: */
#undef IM_DEBUG_INT
/* verbose queuecommand: */
#undef IM_DEBUG_CMD
/* verbose queucommand for specific SCSI-device type: */
#undef IM_DEBUG_CMD_SPEC_DEV
/* verbose device probing */
#undef IM_DEBUG_PROBE
/* device type that shall be displayed on syslog (only during debugging): */
#define IM_DEBUG_CMD_DEVICE TYPE_TAPE
/* relative addresses of hardware registers on a subsystem */
#define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
#define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
#define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
#define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
#define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
/* basic I/O-port of first adapter */
#define IM_IO_PORT 0x3540
/* maximum number of hosts that can be found */
#define IM_N_IO_PORT 8
/*requests going into the upper nibble of the Attention register */
/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
#define IM_IMM_CMD 0x10 /*immediate command */
#define IM_SCB 0x30 /*Subsystem Control Block command */
#define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
#define IM_EOI 0xe0 /*end-of-interrupt request */
/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
#define IM_HW_RESET 0x80 /*hardware reset */
#define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
#define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
/*to interpret the upper nibble of Interrupt Status register */
/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
#define IM_SCB_CMD_COMPLETED 0x10
#define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
#define IM_LOOP_SCATTER_BUFFER_FULL 0x60
#define IM_ADAPTER_HW_FAILURE 0x70
#define IM_IMMEDIATE_CMD_COMPLETED 0xa0
#define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
#define IM_CMD_ERROR 0xe0
#define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
#define IM_CMD_REG_FULL 0x08
#define IM_CMD_REG_EMPTY 0x04
#define IM_INTR_REQUEST 0x02
#define IM_BUSY 0x01
/*immediate commands (word written into low 2 bytes of command reg) */
#define IM_RESET_IMM_CMD 0x0400
#define IM_FEATURE_CTR_IMM_CMD 0x040c
#define IM_DMA_PACING_IMM_CMD 0x040d
#define IM_ASSIGN_IMM_CMD 0x040e
#define IM_ABORT_IMM_CMD 0x040f
#define IM_FORMAT_PREP_IMM_CMD 0x0417
/*SCB (Subsystem Control Block) structure */
struct im_scb {
unsigned short command; /*command word (read, etc.) */
unsigned short enable; /*enable word, modifies cmd */
union {
unsigned long log_blk_adr; /*block address on SCSI device */
unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
} u1;
unsigned long sys_buf_adr; /*physical system memory adr */
unsigned long sys_buf_length; /*size of sys mem buffer */
unsigned long tsb_adr; /*Termination Status Block adr */
unsigned long scb_chain_adr; /*optional SCB chain address */
union {
struct {
unsigned short count; /*block count, on SCSI device */
unsigned short length; /*block length, on SCSI device */
} blk;
unsigned char scsi_command[12]; /*other scsi command */
} u2;
};
/*structure scatter-gather element (for list of system memory areas) */
struct im_sge {
void *address;
unsigned long byte_length;
};
/*structure returned by a get_pos_info command: */
struct im_pos_info {
unsigned short pos_id; /* adapter id */
unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
unsigned char pos_2; /* pos 2 */
unsigned char int_level; /* interrupt level IRQ 11 or 14 */
unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
unsigned char num_luns; /* number of supported luns per device */
unsigned char num_puns; /* number of supported puns */
unsigned char pacing_factor; /* pacing factor */
unsigned char num_ldns; /* number of ldns available */
unsigned char eoi_off; /* time EOI and interrupt inactive */
unsigned char max_busy; /* time between reset and busy on */
unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
unsigned char pos_6; /* pos 6 */
unsigned char pos_5; /* pos 5 */
unsigned short max_overlap; /* maximum overlapping requests */
unsigned short num_bus; /* number of SCSI-busses */
};
/*values for SCB command word */
#define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
#define IM_NO_DISCONNECT 0x0080 /*flag for any command */
#define IM_READ_DATA_CMD 0x1c01
#define IM_WRITE_DATA_CMD 0x1c02
#define IM_READ_VERIFY_CMD 0x1c03
#define IM_WRITE_VERIFY_CMD 0x1c04
#define IM_REQUEST_SENSE_CMD 0x1c08
#define IM_READ_CAPACITY_CMD 0x1c09
#define IM_DEVICE_INQUIRY_CMD 0x1c0b
#define IM_READ_LOGICAL_CMD 0x1c2a
#define IM_OTHER_SCSI_CMD_CMD 0x241f
/* unused, but supported, SCB commands */
#define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
#define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
#define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
#define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
#define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
/*values to set bits in the enable word of SCB */
#define IM_READ_CONTROL 0x8000
#define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
#define IM_RETRY_ENABLE 0x2000
#define IM_POINTER_TO_LIST 0x1000
#define IM_SUPRESS_EXCEPTION_SHORT 0x0400
#define IM_BYPASS_BUFFER 0x0200
#define IM_CHAIN_ON_NO_ERROR 0x0001
/*TSB (Termination Status Block) structure */
struct im_tsb {
unsigned short end_status;
unsigned short reserved1;
unsigned long residual_byte_count;
unsigned long sg_list_element_adr;
unsigned short status_length;
unsigned char dev_status;
unsigned char cmd_status;
unsigned char dev_error;
unsigned char cmd_error;
unsigned short reserved2;
unsigned short reserved3;
unsigned short low_of_last_scb_adr;
unsigned short high_of_last_scb_adr;
};
/*subsystem uses interrupt request level 14 */
#define IM_IRQ 14
/*SCSI-2 F/W may evade to interrupt 11 */
#define IM_IRQ_FW 11
/* Model 95 has an additional alphanumeric display, which can be used
to display SCSI-activities. 8595 models do not have any disk led, which
makes this feature quite useful.
The regular PS/2 disk led is turned on/off by bits 6,7 of system
control port. */
/* LED display-port (actually, last LED on display) */
#define MOD95_LED_PORT 0x108
/* system-control-register of PS/2s with diskindicator */
#define PS2_SYS_CTR 0x92
/* activity displaying methods */
#define LED_DISP 1
#define LED_ADISP 2
#define LED_ACTIVITY 4
/* failed intr */
#define CMD_FAIL 255
/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
displays. ldn is no longer displayed here, because the ldn mapping is now
done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
interest, debugging or just for having fun. The left number gives the
host-adapter number and the right shows the accessed SCSI-ID. */
/* display_mode is set by the ibmmcascsi= command line arg */
static int display_mode = 0;
/* set default adapter timeout */
static unsigned int adapter_timeout = 45;
/* for probing on feature-command: */
static unsigned int global_command_error_excuse = 0;
/* global setting by command line for adapter_speed */
static int global_adapter_speed = 0; /* full speed by default */
/* Panel / LED on, do it right for F/W addressin, too. adisplay will
* just ignore ids>7, as the panel has only 7 digits available */
#define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
outb((char)(ad+48), MOD95_LED_PORT); } \
if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
/* Panel / LED off */
/* bug fixed, Dec 15, 1997, where | was replaced by & here */
#define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
/*list of supported subsystems */
struct subsys_list_struct {
unsigned short mca_id;
char *description;
};
/* types of different supported hardware that goes to hostdata special */
#define IBM_SCSI2_FW 0
#define IBM_7568_WCACHE 1
#define IBM_EXP_UNIT 2
#define IBM_SCSI_WCACHE 3
#define IBM_SCSI 4
/* other special flags for hostdata structure */
#define FORCED_DETECTION 100
#define INTEGRATED_SCSI 101
/* List of possible IBM-SCSI-adapters */
static struct subsys_list_struct subsys_list[] = {
{0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */
{0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
{0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */
{0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */
{0x8efe, "IBM SCSI Adapter"}, /* special = 4 */
};
/* Max number of logical devices (can be up from 0 to 14). 15 is the address
of the adapter itself. */
#define MAX_LOG_DEV 15
/*local data for a logical device */
struct logical_device {
struct im_scb scb; /* SCSI-subsystem-control-block structure */
struct im_tsb tsb; /* SCSI command complete status block structure */
struct im_sge sge[16]; /* scatter gather list structure */
unsigned char buf[256]; /* SCSI command return data buffer */
Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
for interpretation of the possible values */
int block_length; /* blocksize of a particular logical SCSI-device */
int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
};
/* statistics of the driver during operations (for proc_info) */
struct Driver_Statistics {
/* SCSI statistics on the adapter */
int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */
int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */
int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */
int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */
int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */
int scbs; /* short SCBs queued */
int long_scbs; /* long SCBs queued */
int total_accesses; /* total accesses on all ldns */
int total_interrupts; /* total interrupts (should be
same as total_accesses) */
int total_errors; /* command completed with error */
/* dynamical assignment statistics */
int total_scsi_devices; /* number of physical pun,lun */
int dyn_flag; /* flag showing dynamical mode */
int dynamical_assignments; /* number of remappings of ldns */
int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each
ldn */
};
/* data structure for each host adapter */
struct ibmmca_hostdata {
/* array of logical devices: */
struct logical_device _ld[MAX_LOG_DEV + 1];
/* array to convert (pun, lun) into logical device number: */
unsigned char _get_ldn[16][8];
/*array that contains the information about the physical SCSI-devices
attached to this host adapter: */
unsigned char _get_scsi[16][8];
/* used only when checking logical devices: */
int _local_checking_phase_flag;
/* report received interrupt: */
int _got_interrupt;
/* report termination-status of SCSI-command: */
int _stat_result;
/* reset status (used only when doing reset): */
int _reset_status;
/* code of the last SCSI command (needed for panic info): */
int _last_scsi_command[MAX_LOG_DEV + 1];
/* identifier of the last SCSI-command type */
int _last_scsi_type[MAX_LOG_DEV + 1];
/* last blockcount */
int _last_scsi_blockcount[MAX_LOG_DEV + 1];
/* last locgical block address */
unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
/* Counter that points on the next reassignable ldn for dynamical
remapping. The default value is 7, that is the first reassignable
number in the list at boottime: */
int _next_ldn;
/* Statistics-structure for this IBM-SCSI-host: */
struct Driver_Statistics _IBM_DS;
/* This hostadapters pos-registers pos2 until pos6 */
unsigned int _pos[8];
/* assign a special variable, that contains dedicated info about the
adaptertype */
int _special;
/* connector size on the MCA bus */
int _connector_size;
/* synchronous SCSI transfer rate bitpattern */
int _adapter_speed;
};
/* macros to access host data structure */
#define subsystem_pun(hi) (hosts[(hi)]->this_id)
#define subsystem_maxid(hi) (hosts[(hi)]->max_id)
#define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
#define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
#define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
#define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
#define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
#define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
#define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
#define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
#define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
#define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
#define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
#define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
#define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
#define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
#define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
#define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2])
#define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3])
#define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4])
#define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5])
#define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6])
/* Define a arbitrary number as subsystem-marker-type. This number is, as
described in the ANSI-SCSI-standard, not occupied by other device-types. */
#define TYPE_IBM_SCSI_ADAPTER 0x2F
/* Define 0xFF for no device type, because this type is not defined within
the ANSI-SCSI-standard, therefore, it can be used and should not cause any
harm. */
#define TYPE_NO_DEVICE 0xFF
/* define medium-changer. If this is not defined previously, e.g. Linux
2.0.x, define this type here. */
#ifndef TYPE_MEDIUM_CHANGER
#define TYPE_MEDIUM_CHANGER 0x08
#endif
/* define possible operations for the immediate_assign command */
#define SET_LDN 0
#define REMOVE_LDN 1
/* ldn which is used to probe the SCSI devices */
#define PROBE_LDN 0
/* reset status flag contents */
#define IM_RESET_NOT_IN_PROGRESS 0
#define IM_RESET_IN_PROGRESS 1
#define IM_RESET_FINISHED_OK 2
#define IM_RESET_FINISHED_FAIL 3
#define IM_RESET_NOT_IN_PROGRESS_NO_INT 4
#define IM_RESET_FINISHED_OK_NO_INT 5
/* define undefined SCSI-command */
#define NO_SCSI 0xffff
/*-----------------------------------------------------------------------*/
/* if this is nonzero, ibmmcascsi option has been passed to the kernel */
static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 };
static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 };
/* fill module-parameters only, when this define is present.
(that is kernel version 2.1.x) */
#if defined(MODULE)
static char *boot_options = NULL;
module_param(boot_options, charp, 0);
module_param_array(io_port, int, NULL, 0);
module_param_array(scsi_id, int, NULL, 0);
#if 0 /* FIXME: No longer exist? --RR */
MODULE_PARM(display, "1i");
MODULE_PARM(adisplay, "1i");
MODULE_PARM(normal, "1i");
MODULE_PARM(ansi, "1i");
#endif
MODULE_LICENSE("GPL");
#endif
/*counter of concurrent disk read/writes, to turn on/off disk led */
static int disk_rw_in_progress = 0;
/* host information */
static int found = 0;
static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
static unsigned int pos[8]; /* whole pos register-line for diagnosis */
/* Taking into account the additions, made by ZP Gu.
* This selects now the preset value from the configfile and
* offers the 'normal' commandline option to be accepted */
#ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD
static char ibm_ansi_order = 1;
#else
static char ibm_ansi_order = 0;
#endif
static void issue_cmd(int, unsigned long, unsigned char);
static void internal_done(Scsi_Cmnd * cmd);
static void check_devices(int, int);
static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int);
static int immediate_feature(int, unsigned int, unsigned int);
#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
static int immediate_reset(int, unsigned int);
#endif
static int device_inquiry(int, int);
static int read_capacity(int, int);
static int get_pos_info(int);
static char *ti_p(int);
static char *ti_l(int);
static char *ibmrate(unsigned int, int);
static int probe_display(int);
static int probe_bus_mode(int);
static int device_exists(int, int, int *, int *);
static struct Scsi_Host *ibmmca_register(struct scsi_host_template *, int, int, int, char *);
static int option_setup(char *);
/* local functions needed for proc_info */
static int ldn_access_load(int, int);
static int ldn_access_total_read_write(int);
static irqreturn_t interrupt_handler(int irq, void *dev_id,
struct pt_regs *regs)
{
int host_index, ihost_index;
unsigned int intr_reg;
unsigned int cmd_result;
unsigned int ldn;
Scsi_Cmnd *cmd;
int lastSCSI;
struct Scsi_Host *dev = dev_id;
spin_lock(dev->host_lock);
/* search for one adapter-response on shared interrupt */
for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++);
/* return if some other device on this IRQ caused the interrupt */
if (!hosts[host_index]) {
spin_unlock(dev->host_lock);
return IRQ_NONE;
}
/* the reset-function already did all the job, even ints got
renabled on the subsystem, so just return */
if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) {
reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS;
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
}
/*must wait for attention reg not busy, then send EOI to subsystem */
while (1) {
if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
break;
cpu_relax();
}
ihost_index = host_index;
/*get command result and logical device */
intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index)));
cmd_result = intr_reg & 0xf0;
ldn = intr_reg & 0x0f;
/* get the last_scsi_command here */
lastSCSI = last_scsi_command(ihost_index)[ldn];
outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index));
/*these should never happen (hw fails, or a local programming bug) */
if (!global_command_error_excuse) {
switch (cmd_result) {
/* Prevent from Ooopsing on error to show the real reason */
case IM_ADAPTER_HW_FAILURE:
case IM_SOFTWARE_SEQUENCING_ERROR:
case IM_CMD_ERROR:
printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n");
printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable);
if (ld(ihost_index)[ldn].cmd)
printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length));
else
printk("none,");
if (ld(ihost_index)[ldn].cmd)
printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length);
else
printk("Blocksize=none");
printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn);
if (ld(ihost_index)[ldn].cmd) {
printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count);
printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr);
}
printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN");
/* if errors appear, enter this section to give detailed info */
printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n");
printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]);
printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index)));
printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index)));
printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg);
printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index)));
if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) {
printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command);
printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable);
printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr);
printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr);
printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length);
printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr);
printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr);
printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count);
printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length);
}
printk(KERN_ERR " Send this report to the maintainer.\n");
panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result);
break;
}
} else {
/* The command error handling is made silent, but we tell the
* calling function, that there is a reported error from the
* adapter. */
switch (cmd_result) {
case IM_ADAPTER_HW_FAILURE:
case IM_SOFTWARE_SEQUENCING_ERROR:
case IM_CMD_ERROR:
global_command_error_excuse = CMD_FAIL;
break;
default:
global_command_error_excuse = 0;
break;
}
}
/* if no panic appeared, increase the interrupt-counter */
IBM_DS(ihost_index).total_interrupts++;
/*only for local checking phase */
if (local_checking_phase_flag(ihost_index)) {
stat_result(ihost_index) = cmd_result;
got_interrupt(ihost_index) = 1;
reset_status(ihost_index) = IM_RESET_FINISHED_OK;
last_scsi_command(ihost_index)[ldn] = NO_SCSI;
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
}
/* handling of commands coming from upper level of scsi driver */
if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) {
/* verify ldn, and may handle rare reset immediate command */
if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) {
if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
disk_rw_in_progress = 0;
PS2_DISK_LED_OFF();
reset_status(ihost_index) = IM_RESET_FINISHED_FAIL;
} else {
/*reset disk led counter, turn off disk led */
disk_rw_in_progress = 0;
PS2_DISK_LED_OFF();
reset_status(ihost_index) = IM_RESET_FINISHED_OK;
}
stat_result(ihost_index) = cmd_result;
last_scsi_command(ihost_index)[ldn] = NO_SCSI;
last_scsi_type(ihost_index)[ldn] = 0;
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
} else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) {
/* react on SCSI abort command */
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n");
#endif
disk_rw_in_progress = 0;
PS2_DISK_LED_OFF();
cmd = ld(ihost_index)[ldn].cmd;
ld(ihost_index)[ldn].cmd = NULL;
if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE)
cmd->result = DID_NO_CONNECT << 16;
else
cmd->result = DID_ABORT << 16;
stat_result(ihost_index) = cmd_result;
last_scsi_command(ihost_index)[ldn] = NO_SCSI;
last_scsi_type(ihost_index)[ldn] = 0;
if (cmd->scsi_done)
(cmd->scsi_done) (cmd); /* should be the internal_done */
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
} else {
disk_rw_in_progress = 0;
PS2_DISK_LED_OFF();
reset_status(ihost_index) = IM_RESET_FINISHED_OK;
stat_result(ihost_index) = cmd_result;
last_scsi_command(ihost_index)[ldn] = NO_SCSI;
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
}
}
last_scsi_command(ihost_index)[ldn] = NO_SCSI;
last_scsi_type(ihost_index)[ldn] = 0;
cmd = ld(ihost_index)[ldn].cmd;
ld(ihost_index)[ldn].cmd = NULL;
#ifdef IM_DEBUG_TIMEOUT
if (cmd) {
if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) {
printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun);
return IRQ_HANDLED;
}
}
#endif
/*if no command structure, just return, else clear cmd */
if (!cmd)
{
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
}
#ifdef IM_DEBUG_INT
printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error);
#endif
/*if this is end of media read/write, may turn off PS/2 disk led */
if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) {
/* only access this, if there was a valid device addressed */
if (--disk_rw_in_progress == 0)
PS2_DISK_LED_OFF();
}
/* IBM describes the status-mask to be 0x1e, but this is not conform
* with SCSI-definition, I suppose, the reason for it is that IBM
* adapters do not support CMD_TERMINATED, TASK_SET_FULL and
* ACA_ACTIVE as returning statusbyte information. (ML) */
if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) {
cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e);
IBM_DS(ihost_index).total_errors++;
} else
cmd->result = 0;
/* write device status into cmd->result, and call done function */
if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */
cmd->result |= DID_BAD_INTR << 16;
printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n");
} else /* things went right :-) */
cmd->result |= DID_OK << 16;
if (cmd->scsi_done)
(cmd->scsi_done) (cmd);
spin_unlock(dev->host_lock);
return IRQ_HANDLED;
}
static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg)
{
unsigned long flags;
/* must wait for attention reg not busy */
while (1) {
spin_lock_irqsave(hosts[host_index]->host_lock, flags);
if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
break;
spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
}
/* write registers and enable system interrupts */
outl(cmd_reg, IM_CMD_REG(host_index));
outb(attn_reg, IM_ATTN_REG(host_index));
spin_unlock_irqrestore(hosts[host_index]->host_lock, flags);
}
static void internal_done(Scsi_Cmnd * cmd)
{
cmd->SCp.Status++;
return;
}
/* SCSI-SCB-command for device_inquiry */
static int device_inquiry(int host_index, int ldn)
{
int retr;
struct im_scb *scb;
struct im_tsb *tsb;
unsigned char *buf;
scb = &(ld(host_index)[ldn].scb);
tsb = &(ld(host_index)[ldn].tsb);
buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */
for (retr = 0; retr < 3; retr++) {
/* fill scb with inquiry command */
scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT;
scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD;
last_scsi_type(host_index)[ldn] = IM_SCB;
scb->sys_buf_adr = isa_virt_to_bus(buf);
scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
scb->tsb_adr = isa_virt_to_bus(tsb);
/* issue scb to passed ldn, and busy wait for interrupt */
got_interrupt(host_index) = 0;
issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
while (!got_interrupt(host_index))
barrier();
/*if command succesful, break */
if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
return 1;
}
/*if all three retries failed, return "no device at this ldn" */
if (retr >= 3)
return 0;
else
return 1;
}
static int read_capacity(int host_index, int ldn)
{
int retr;
struct im_scb *scb;
struct im_tsb *tsb;
unsigned char *buf;
scb = &(ld(host_index)[ldn].scb);
tsb = &(ld(host_index)[ldn].tsb);
buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
ld(host_index)[ldn].tsb.dev_status = 0;
for (retr = 0; retr < 3; retr++) {
/*fill scb with read capacity command */
scb->command = IM_READ_CAPACITY_CMD;
scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD;
last_scsi_type(host_index)[ldn] = IM_SCB;
scb->sys_buf_adr = isa_virt_to_bus(buf);
scb->sys_buf_length = 8;
scb->tsb_adr = isa_virt_to_bus(tsb);
/*issue scb to passed ldn, and busy wait for interrupt */
got_interrupt(host_index) = 0;
issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
while (!got_interrupt(host_index))
barrier();
/*if got capacity, get block length and return one device found */
if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
return 1;
}
/*if all three retries failed, return "no device at this ldn" */
if (retr >= 3)
return 0;
else
return 1;
}
static int get_pos_info(int host_index)
{
int retr;
struct im_scb *scb;
struct im_tsb *tsb;
unsigned char *buf;
scb = &(ld(host_index)[MAX_LOG_DEV].scb);
tsb = &(ld(host_index)[MAX_LOG_DEV].tsb);
buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf));
ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0;
for (retr = 0; retr < 3; retr++) {
/*fill scb with get_pos_info command */
scb->command = IM_GET_POS_INFO_CMD;
scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER;
last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD;
last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB;
scb->sys_buf_adr = isa_virt_to_bus(buf);
if (special(host_index) == IBM_SCSI2_FW)
scb->sys_buf_length = 256; /* get all info from F/W adapter */
else
scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */
scb->tsb_adr = isa_virt_to_bus(tsb);
/*issue scb to ldn=15, and busy wait for interrupt */
got_interrupt(host_index) = 0;
issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
/* FIXME: timeout */
while (!got_interrupt(host_index))
barrier();
/*if got POS-stuff, get block length and return one device found */
if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES))
return 1;
}
/* if all three retries failed, return "no device at this ldn" */
if (retr >= 3)
return 0;
else
return 1;
}
/* SCSI-immediate-command for assign. This functions maps/unmaps specific
ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the
subsystem and for dynamical remapping od ldns. */
static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation)
{
int retr;
unsigned long imm_cmd;
for (retr = 0; retr < 3; retr++) {
/* select mutation level of the SCSI-adapter */
switch (special(host_index)) {
case IBM_SCSI2_FW:
imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD);
imm_cmd |= (unsigned long) ((lun & 7) << 24);
imm_cmd |= (unsigned long) ((operation & 1) << 23);
imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24);
imm_cmd |= (unsigned long) ((ldn & 15) << 16);
break;
default:
imm_cmd = inl(IM_CMD_REG(host_index));
imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */
imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD);
imm_cmd |= (unsigned long) ((lun & 7) << 24);
imm_cmd |= (unsigned long) ((operation & 1) << 23);
imm_cmd |= (unsigned long) ((pun & 7) << 20);
imm_cmd |= (unsigned long) ((ldn & 15) << 16);
break;
}
last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD;
last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
got_interrupt(host_index) = 0;
issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
while (!got_interrupt(host_index))
barrier();
/*if command succesful, break */
if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
return 1;
}
if (retr >= 3)
return 0;
else
return 1;
}
static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout)
{
int retr;
unsigned long imm_cmd;
for (retr = 0; retr < 3; retr++) {
/* select mutation level of the SCSI-adapter */
imm_cmd = IM_FEATURE_CTR_IMM_CMD;
imm_cmd |= (unsigned long) ((speed & 0x7) << 29);
imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16);
last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD;
last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD;
got_interrupt(host_index) = 0;
/* we need to run into command errors in order to probe for the
* right speed! */
global_command_error_excuse = 1;
issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV);
/* FIXME: timeout */
while (!got_interrupt(host_index))
barrier();
if (global_command_error_excuse == CMD_FAIL) {
global_command_error_excuse = 0;
return 2;
} else
global_command_error_excuse = 0;
/*if command succesful, break */
if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
return 1;
}
if (retr >= 3)
return 0;
else
return 1;
}
#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
static int immediate_reset(int host_index, unsigned int ldn)
{
int retries;
int ticks;
unsigned long imm_command;
for (retries = 0; retries < 3; retries++) {
imm_command = inl(IM_CMD_REG(host_index));
imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */
imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD;
last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
got_interrupt(host_index) = 0;
reset_status(host_index) = IM_RESET_IN_PROGRESS;
issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn);
ticks = IM_RESET_DELAY * HZ;
while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) {
udelay((1 + 999 / HZ) * 1000);
barrier();
}
/* if reset did not complete, just complain */
if (!ticks) {
printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
reset_status(host_index) = IM_RESET_FINISHED_OK;
/* did not work, finish */
return 1;
}
/*if command succesful, break */
if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED)
return 1;
}
if (retries >= 3)
return 0;
else
return 1;
}
#endif
/* type-interpreter for physical device numbers */
static char *ti_p(int dev)
{
switch (dev) {
case TYPE_IBM_SCSI_ADAPTER:
return ("A");
case TYPE_DISK:
return ("D");
case TYPE_TAPE:
return ("T");
case TYPE_PROCESSOR:
return ("P");
case TYPE_WORM:
return ("W");
case TYPE_ROM:
return ("R");
case TYPE_SCANNER:
return ("S");
case TYPE_MOD:
return ("M");
case TYPE_MEDIUM_CHANGER:
return ("C");
case TYPE_NO_LUN:
return ("+"); /* show NO_LUN */
}
return ("-"); /* TYPE_NO_DEVICE and others */
}
/* interpreter for logical device numbers (ldn) */
static char *ti_l(int val)
{
const char hex[16] = "0123456789abcdef";
static char answer[2];
answer[1] = (char) (0x0);
if (val <= MAX_LOG_DEV)
answer[0] = hex[val];
else
answer[0] = '-';
return (char *) &answer;
}
/* transfers bitpattern of the feature command to values in MHz */
static char *ibmrate(unsigned int speed, int i)
{
switch (speed) {
case 0:
return i ? "5.00" : "10.00";
case 1:
return i ? "4.00" : "8.00";
case 2:
return i ? "3.33" : "6.66";
case 3:
return i ? "2.86" : "5.00";
case 4:
return i ? "2.50" : "4.00";
case 5:
return i ? "2.22" : "3.10";
case 6:
return i ? "2.00" : "2.50";
case 7:
return i ? "1.82" : "2.00";
}
return "---";
}
static int probe_display(int what)
{
static int rotator = 0;
const char rotor[] = "|/-\\";
if (!(display_mode & LED_DISP))
return 0;
if (!what) {
outl(0x20202020, MOD95_LED_PORT);
outl(0x20202020, MOD95_LED_PORT + 4);
} else {
outb('S', MOD95_LED_PORT + 7);
outb('C', MOD95_LED_PORT + 6);
outb('S', MOD95_LED_PORT + 5);
outb('I', MOD95_LED_PORT + 4);
outb('i', MOD95_LED_PORT + 3);
outb('n', MOD95_LED_PORT + 2);
outb('i', MOD95_LED_PORT + 1);
outb((char) (rotor[rotator]), MOD95_LED_PORT);
rotator++;
if (rotator > 3)
rotator = 0;
}
return 0;
}
static int probe_bus_mode(int host_index)
{
struct im_pos_info *info;
int num_bus = 0;
int ldn;
info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf));
if (get_pos_info(host_index)) {
if (info->connector_size & 0xf000)
subsystem_connector_size(host_index) = 16;
else
subsystem_connector_size(host_index) = 32;
num_bus |= (info->pos_4b & 8) >> 3;
for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) {
if (!((info->cache_stat >> ldn) & 1))
ld(host_index)[ldn].cache_flag = 0;
}
if (!((info->retry_stat >> ldn) & 1))
ld(host_index)[ldn].retry_flag = 0;
}
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: SCSI-Cache bits: ");
for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
printk("%d", ld(host_index)[ldn].cache_flag);
}
printk("\nIBM MCA SCSI: SCSI-Retry bits: ");
for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
printk("%d", ld(host_index)[ldn].retry_flag);
}
printk("\n");
#endif
}
return num_bus;
}
/* probing scsi devices */
static void check_devices(int host_index, int adaptertype)
{
int id, lun, ldn, ticks;
int count_devices; /* local counter for connected device */
int max_pun;
int num_bus;
int speedrun; /* local adapter_speed check variable */
/* assign default values to certain variables */
ticks = 0;
count_devices = 0;
IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */
IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */
next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */
/* initialize the very important driver-informational arrays/structs */
memset(ld(host_index), 0, sizeof(ld(host_index)));
for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) {
last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */
last_scsi_type(host_index)[ldn] = 0;
ld(host_index)[ldn].cache_flag = 1;
ld(host_index)[ldn].retry_flag = 1;
}
memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */
memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */
for (lun = 0; lun < 8; lun++) {
/* mark the adapter at its pun on all luns */
get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER;
get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem
ldn is active for all
luns. */
}
probe_display(0); /* Supercool display usage during SCSI-probing. */
/* This makes sense, when booting without any */
/* monitor connected on model XX95. */
/* STEP 1: */
adapter_speed(host_index) = global_adapter_speed;
speedrun = adapter_speed(host_index);
while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) {
probe_display(1);
if (speedrun == 7)
panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n");
speedrun++;
if (speedrun > 7)
speedrun = 7;
}
adapter_speed(host_index) = speedrun;
/* Get detailed information about the current adapter, necessary for
* device operations: */
num_bus = probe_bus_mode(host_index);
/* num_bus contains only valid data for the F/W adapter! */
if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */
/* F/W adapter PUN-space extension evaluation: */
if (num_bus) {
printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n");
subsystem_maxid(host_index) = 16;
} else {
printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n");
subsystem_maxid(host_index) = 8;
}
printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype));
} else /* all other IBM SCSI adapters: */
printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype));
/* assign correct PUN device space */
max_pun = subsystem_maxid(host_index);
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index);
printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
#else
printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New");
#endif
for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) {
probe_display(1);
#ifdef IM_DEBUG_PROBE
printk(".");
#endif
immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */
}
lun = 0; /* default lun is 0 */
#ifndef IM_DEBUG_PROBE
printk("cleared,");
#endif
/* STEP 2: */
#ifdef IM_DEBUG_PROBE
printk("\nIBM MCA SCSI: Scanning SCSI-devices.");
#endif
for (id = 0; id < max_pun; id++)
#ifdef CONFIG_SCSI_MULTI_LUN
for (lun = 0; lun < 8; lun++)
#endif
{
probe_display(1);
#ifdef IM_DEBUG_PROBE
printk(".");
#endif
if (id != subsystem_pun(host_index)) {
/* if pun is not the adapter: */
/* set ldn=0 to pun,lun */
immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN);
if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */
get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]);
/* entry, even for NO_LUN */
if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN)
count_devices++; /* a existing device is found */
}
/* remove ldn */
immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN);
}
}
#ifndef IM_DEBUG_PROBE
printk("scanned,");
#endif
/* STEP 3: */
#ifdef IM_DEBUG_PROBE
printk("\nIBM MCA SCSI: Mapping SCSI-devices.");
#endif
ldn = 0;
lun = 0;
#ifdef CONFIG_SCSI_MULTI_LUN
for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++)
#endif
for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
probe_display(1);
#ifdef IM_DEBUG_PROBE
printk(".");
#endif
if (id != subsystem_pun(host_index)) {
if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) {
/* Only map if accepted type. Always enter for
lun == 0 to get no gaps into ldn-mapping for ldn<7. */
immediate_assign(host_index, id, lun, ldn, SET_LDN);
get_ldn(host_index)[id][lun] = ldn; /* map ldn */
if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET
printk("resetting device at ldn=%x ... ", ldn);
immediate_reset(host_index, ldn);
#endif
ldn++;
} else {
/* device vanished, probably because we don't know how to
* handle it or because it has problems */
if (lun > 0) {
/* remove mapping */
get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN);
} else
ldn++;
}
} else if (lun == 0) {
/* map lun == 0, even if no device exists */
immediate_assign(host_index, id, lun, ldn, SET_LDN);
get_ldn(host_index)[id][lun] = ldn; /* map ldn */
ldn++;
}
}
}
/* STEP 4: */
/* map remaining ldns to non-existing devices */
for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++)
for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) {
if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) {
probe_display(1);
/* Map remaining ldns only to NON-existing pun,lun
combinations to make sure an inquiry will fail.
For MULTI_LUN, it is needed to avoid adapter autonome
SCSI-remapping. */
immediate_assign(host_index, id, lun, ldn, SET_LDN);
get_ldn(host_index)[id][lun] = ldn;
ldn++;
}
}
#ifndef IM_DEBUG_PROBE
printk("mapped.");
#endif
printk("\n");
#ifdef IM_DEBUG_PROBE
if (ibm_ansi_order)
printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n");
else
printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n");
#endif
#ifdef IM_DEBUG_PROBE
/* Show the physical and logical mapping during boot. */
printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n");
printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n");
printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
for (id = 0; id < max_pun; id++) {
printk("%2d ", id);
for (lun = 0; lun < 8; lun++)
printk("%2s ", ti_p(get_scsi(host_index)[id][lun]));
printk(" %2d ", id);
for (lun = 0; lun < 8; lun++)
printk("%2s ", ti_l(get_ldn(host_index)[id][lun]));
printk("\n");
}
#endif
/* assign total number of found SCSI-devices to the statistics struct */
IBM_DS(host_index).total_scsi_devices = count_devices;
/* decide for output in /proc-filesystem, if the configuration of
SCSI-devices makes dynamical reassignment of devices necessary */
if (count_devices >= MAX_LOG_DEV)
IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */
else
IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */
/* If no SCSI-devices are assigned, return 1 in order to cause message. */
if (ldn == 0)
printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n");
/* reset the counters for statistics on the current adapter */
IBM_DS(host_index).scbs = 0;
IBM_DS(host_index).long_scbs = 0;
IBM_DS(host_index).total_accesses = 0;
IBM_DS(host_index).total_interrupts = 0;
IBM_DS(host_index).dynamical_assignments = 0;
memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access));
memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access));
memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access));
memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access));
memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access));
memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments));
probe_display(0);
return;
}
static int device_exists(int host_index, int ldn, int *block_length, int *device_type)
{
unsigned char *buf;
/* if no valid device found, return immediately with 0 */
if (!(device_inquiry(host_index, ldn)))
return 0;
buf = (unsigned char *) (&(ld(host_index)[ldn].buf));
if (*buf == TYPE_ROM) {
*device_type = TYPE_ROM;
*block_length = 2048; /* (standard blocksize for yellow-/red-book) */
return 1;
}
if (*buf == TYPE_WORM) {
*device_type = TYPE_WORM;
*block_length = 2048;
return 1;
}
if (*buf == TYPE_DISK) {
*device_type = TYPE_DISK;
if (read_capacity(host_index, ldn)) {
*block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
return 1;
} else
return 0;
}
if (*buf == TYPE_MOD) {
*device_type = TYPE_MOD;
if (read_capacity(host_index, ldn)) {
*block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24);
return 1;
} else
return 0;
}
if (*buf == TYPE_TAPE) {
*device_type = TYPE_TAPE;
*block_length = 0; /* not in use (setting by mt and mtst in op.) */
return 1;
}
if (*buf == TYPE_PROCESSOR) {
*device_type = TYPE_PROCESSOR;
*block_length = 0; /* they set their stuff on drivers */
return 1;
}
if (*buf == TYPE_SCANNER) {
*device_type = TYPE_SCANNER;
*block_length = 0; /* they set their stuff on drivers */
return 1;
}
if (*buf == TYPE_MEDIUM_CHANGER) {
*device_type = TYPE_MEDIUM_CHANGER;
*block_length = 0; /* One never knows, what to expect on a medium
changer device. */
return 1;
}
return 0;
}
static void internal_ibmmca_scsi_setup(char *str, int *ints)
{
int i, j, io_base, id_base;
char *token;
io_base = 0;
id_base = 0;
if (str) {
j = 0;
while ((token = strsep(&str, ",")) != NULL) {
if (!strcmp(token, "activity"))
display_mode |= LED_ACTIVITY;
if (!strcmp(token, "display"))
display_mode |= LED_DISP;
if (!strcmp(token, "adisplay"))
display_mode |= LED_ADISP;
if (!strcmp(token, "normal"))
ibm_ansi_order = 0;
if (!strcmp(token, "ansi"))
ibm_ansi_order = 1;
if (!strcmp(token, "fast"))
global_adapter_speed = 0;
if (!strcmp(token, "medium"))
global_adapter_speed = 4;
if (!strcmp(token, "slow"))
global_adapter_speed = 7;
if ((*token == '-') || (isdigit(*token))) {
if (!(j % 2) && (io_base < IM_MAX_HOSTS))
io_port[io_base++] = simple_strtoul(token, NULL, 0);
if ((j % 2) && (id_base < IM_MAX_HOSTS))
scsi_id[id_base++] = simple_strtoul(token, NULL, 0);
j++;
}
}
} else if (ints) {
for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) {
io_port[i] = ints[2 * i + 2];
scsi_id[i] = ints[2 * i + 2];
}
}
return;
}
static int ibmmca_getinfo(char *buf, int slot, void *dev_id)
{
struct Scsi_Host *shpnt;
int len, speciale, connectore, k;
unsigned int pos[8];
unsigned long flags;
struct Scsi_Host *dev = dev_id;
spin_lock_irqsave(dev->host_lock, flags);
shpnt = dev; /* assign host-structure to local pointer */
len = 0; /* set filled text-buffer index to 0 */
/* get the _special contents of the hostdata structure */
speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special;
connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size;
for (k = 2; k < 4; k++)
pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k];
if (speciale == FORCED_DETECTION) { /* forced detection */
len += sprintf(buf + len,
"Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n");
} else if (speciale == INTEGRATED_SCSI) {
/* if the integrated subsystem has been found automatically: */
len += sprintf(buf + len,
"Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible");
} else if ((speciale >= 0) && (speciale < (sizeof(subsys_list) / sizeof(struct subsys_list_struct)))) {
/* if the subsystem is a slot adapter */
len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: ");
if ((pos[2] & 0xf0) == 0xf0)
len += sprintf(buf + len, "off\n");
else
len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000);
len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled");
len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2));
} else {
len += sprintf(buf + len, "Adapter category: unknown\n");
}
/* common subsystem information to write to the slotn file */
len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id);
len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7));
len += sprintf(buf + len, "MCA-slot size: %d bits", connectore);
/* Now make sure, the bufferlength is devidable by 4 to avoid
* paging problems of the buffer. */
while (len % sizeof(int) != (sizeof(int) - 1))
len += sprintf(buf + len, " ");
len += sprintf(buf + len, "\n");
spin_unlock_irqrestore(shpnt->host_lock, flags);
return len;
}
int ibmmca_detect(struct scsi_host_template * scsi_template)
{
struct Scsi_Host *shpnt;
int port, id, i, j, k, list_size, slot;
int devices_on_irq_11 = 0;
int devices_on_irq_14 = 0;
int IRQ14_registered = 0;
int IRQ11_registered = 0;
found = 0; /* make absolutely sure, that found is set to 0 */
/* First of all, print the version number of the driver. This is
* important to allow better user bugreports in case of already
* having problems with the MCA_bus probing. */
printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION);
/* if this is not MCA machine, return "nothing found" */
if (!MCA_bus) {
printk(KERN_INFO "IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n" " This machine does not have any IBM MCA-bus\n" " or the MCA-Kernel-support is not enabled!\n");
return 0;
}
#ifdef MODULE
/* If the driver is run as module, read from conf.modules or cmd-line */
if (boot_options)
option_setup(boot_options);
#endif
/* get interrupt request level */
if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ);
return 0;
} else
IRQ14_registered++;
/* if ibmmcascsi setup option was passed to kernel, return "found" */
for (i = 0; i < IM_MAX_HOSTS; i++)
if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) {
printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]);
if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) {
for (k = 2; k < 7; k++)
((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0;
((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION;
mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter");
mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
mca_mark_as_used(MCA_INTEGSCSI);
devices_on_irq_14++;
}
}
if (found)
return found;
/* The POS2-register of all PS/2 model SCSI-subsystems has the following
* interpretation of bits:
* Bit 7 - 4 : Chip Revision ID (Release)
* Bit 3 - 2 : Reserved
* Bit 1 : 8k NVRAM Disabled
* Bit 0 : Chip Enable (EN-Signal)
* The POS3-register is interpreted as follows:
* Bit 7 - 5 : SCSI ID
* Bit 4 : Reserved = 0
* Bit 3 - 0 : Reserved = 0
* (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common
* Interfaces (1991)").
* In short words, this means, that IBM PS/2 machines only support
* 1 single subsystem by default. The slot-adapters must have another
* configuration on pos2. Here, one has to assume the following
* things for POS2-register:
* Bit 7 - 4 : Chip Revision ID (Release)
* Bit 3 - 1 : port offset factor
* Bit 0 : Chip Enable (EN-Signal)
* As I found a patch here, setting the IO-registers to 0x3540 forced,
* as there was a 0x05 in POS2 on a model 56, I assume, that the
* port 0x3540 must be fix for integrated SCSI-controllers.
* Ok, this discovery leads to the following implementation: (M.Lang) */
/* first look for the IBM SCSI integrated subsystem on the motherboard */
for (j = 0; j < 8; j++) /* read the pos-information */
pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j);
/* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but
* if we ignore the settings of all surrounding pos registers, it is not
* completely sufficient to only check pos2 and pos3. */
/* Therefore, now the following if statement is used to
* make sure, we see a real integrated onboard SCSI-interface and no
* internal system information, which gets mapped to some pos registers
* on models 95xx. */
if ((!pos[0] && !pos[1] && pos[2] > 0 && pos[3] > 0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) || (pos[0] == 0xff && pos[1] == 0xff && pos[2] < 0xff && pos[3] < 0xff && pos[4] == 0xff && pos[5] == 0xff && pos[6] == 0xff && pos[7] == 0xff)) {
if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */
port = IM_IO_PORT;
else { /* if disabled, no IRQs will be generated, as the chip won't
* listen to the incoming commands and will do really nothing,
* except for listening to the pos-register settings. If this
* happens, I need to hugely think about it, as one has to
* write something to the MCA-Bus pos register in order to
* enable the chip. Normally, IBM-SCSI won't pass the POST,
* when the chip is disabled (see IBM tech. ref.). */
port = IM_IO_PORT; /* anyway, set the portnumber and warn */
printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n");
}
id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */
/* give detailed information on the subsystem. This helps me
* additionally during debugging and analyzing bug-reports. */
printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id);
printk(KERN_INFO " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled.");
/* register the found integrated SCSI-subsystem */
if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller")))
{
for (k = 2; k < 7; k++)
((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI;
mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller");
mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt);
mca_mark_as_used(MCA_INTEGSCSI);
devices_on_irq_14++;
}
}
/* now look for other adapters in MCA slots, */
/* determine the number of known IBM-SCSI-subsystem types */
/* see the pos[2] dependence to get the adapter port-offset. */
list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
for (i = 0; i < list_size; i++) {
/* scan each slot for a fitting adapter id */
slot = 0; /* start at slot 0 */
while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot))
!= MCA_NOTFOUND) { /* scan through all slots */
for (j = 0; j < 8; j++) /* read the pos-information */
pos[j] = mca_read_stored_pos(slot, j);
if ((pos[2] & 1) == 1)
/* is the subsystem chip enabled ? */
/* (explanations see above) */
port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
else {
/* anyway, set the portnumber and warn */
port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
printk(KERN_WARNING " SCSI-operations may not work.\n");
}
if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
printk(KERN_ERR " Impossible to determine adapter PUN!\n");
printk(KERN_ERR " Guessing adapter PUN = 7.\n");
id = 7;
} else {
id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
if (i == IBM_SCSI2_FW) {
id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
* for F/W adapters */
}
}
if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
/* IRQ11 is used by SCSI-2 F/W Adapter/A */
printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
/* get interrupt request level */
if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) {
printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
} else
IRQ11_registered++;
}
printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
if ((pos[2] & 0xf0) == 0xf0)
printk(KERN_DEBUG" ROM Addr.=off,");
else
printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
/* register the hostadapter */
if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
for (k = 2; k < 8; k++)
((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
mca_set_adapter_name(slot, subsys_list[i].description);
mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
mca_mark_as_used(slot);
if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
devices_on_irq_11++;
else
devices_on_irq_14++;
}
slot++; /* advance to next slot */
} /* advance to next adapter id in the list of IBM-SCSI-subsystems */
}
/* now check for SCSI-adapters, mapped to the integrated SCSI
* area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here,
* as this is a known effect on some models 95xx. */
list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct);
for (i = 0; i < list_size; i++) {
/* scan each slot for a fitting adapter id */
slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI);
if (slot != MCA_NOTFOUND) { /* scan through all slots */
for (j = 0; j < 8; j++) /* read the pos-information */
pos[j] = mca_read_stored_pos(slot, j);
if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */
/* (explanations see above) */
port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
} else { /* anyway, set the portnumber and warn */
port = IM_IO_PORT + ((pos[2] & 0x0e) << 2);
printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n");
printk(KERN_WARNING " SCSI-operations may not work.\n");
}
if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) {
printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n");
printk(KERN_ERR " Impossible to determine adapter PUN!\n");
printk(KERN_ERR " Guessing adapter PUN = 7.\n");
id = 7;
} else {
id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */
if (i == IBM_SCSI2_FW)
id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit
* for F/W adapters */
}
if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) {
/* IRQ11 is used by SCSI-2 F/W Adapter/A */
printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n");
/* get interrupt request level */
if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts))
printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW);
else
IRQ11_registered++;
}
printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id);
if ((pos[2] & 0xf0) == 0xf0)
printk(KERN_DEBUG " ROM Addr.=off,");
else
printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000);
printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled.");
/* register the hostadapter */
if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) {
for (k = 2; k < 7; k++)
((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k];
((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i;
mca_set_adapter_name(slot, subsys_list[i].description);
mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt);
mca_mark_as_used(slot);
if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0))
devices_on_irq_11++;
else
devices_on_irq_14++;
}
slot++; /* advance to next slot */
} /* advance to next adapter id in the list of IBM-SCSI-subsystems */
}
if (IRQ11_registered && !devices_on_irq_11)
free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */
if (IRQ14_registered && !devices_on_irq_14)
free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */
if (!devices_on_irq_11 && !devices_on_irq_14)
printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n");
return found; /* return the number of found SCSI hosts. Should be 1 or 0. */
}
static struct Scsi_Host *ibmmca_register(struct scsi_host_template * scsi_template, int port, int id, int adaptertype, char *hostname)
{
struct Scsi_Host *shpnt;
int i, j;
unsigned int ctrl;
/* check I/O region */
if (!request_region(port, IM_N_IO_PORT, hostname)) {
printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT);
return NULL;
}
/* register host */
shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata));
if (!shpnt) {
printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n");
release_region(port, IM_N_IO_PORT);
return NULL;
}
/* request I/O region */
hosts[found] = shpnt; /* add new found hostadapter to the list */
special(found) = adaptertype; /* important assignment or else crash! */
subsystem_connector_size(found) = 0; /* preset slot-size */
shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */
shpnt->io_port = port;
shpnt->n_io_port = IM_N_IO_PORT;
shpnt->this_id = id;
shpnt->max_id = 8; /* 8 PUNs are default */
/* now, the SCSI-subsystem is connected to Linux */
ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found)));
printk("IBM MCA SCSI: This adapters' POS-registers: ");
for (i = 0; i < 8; i++)
printk("%x ", pos[i]);
printk("\n");
#endif
reset_status(found) = IM_RESET_NOT_IN_PROGRESS;
for (i = 0; i < 16; i++) /* reset the tables */
for (j = 0; j < 8; j++)
get_ldn(found)[i][j] = MAX_LOG_DEV;
/* check which logical devices exist */
/* after this line, local interrupting is possible: */
local_checking_phase_flag(found) = 1;
check_devices(found, adaptertype); /* call by value, using the global variable hosts */
local_checking_phase_flag(found) = 0;
found++; /* now increase index to be prepared for next found subsystem */
/* an ibm mca subsystem has been detected */
return shpnt;
}
static int ibmmca_release(struct Scsi_Host *shpnt)
{
release_region(shpnt->io_port, shpnt->n_io_port);
if (!(--found))
free_irq(shpnt->irq, hosts);
return 0;
}
/* The following routine is the SCSI command queue for the midlevel driver */
static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
{
unsigned int ldn;
unsigned int scsi_cmd;
struct im_scb *scb;
struct Scsi_Host *shpnt;
int current_ldn;
int id, lun;
int target;
int host_index;
int max_pun;
int i;
struct scatterlist *sl;
shpnt = cmd->device->host;
/* search for the right hostadapter */
for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
cmd->result = DID_NO_CONNECT << 16;
if (done)
done(cmd);
return 0;
}
max_pun = subsystem_maxid(host_index);
if (ibm_ansi_order) {
target = max_pun - 1 - cmd->device->id;
if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
target--;
else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
target++;
} else
target = cmd->device->id;
/* if (target,lun) is NO LUN or not existing at all, return error */
if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) {
cmd->result = DID_NO_CONNECT << 16;
if (done)
done(cmd);
return 0;
}
/*if (target,lun) unassigned, do further checks... */
ldn = get_ldn(host_index)[target][cmd->device->lun];
if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */
if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */
current_ldn = next_ldn(host_index); /* stop-value for one circle */
while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */
/* command-processing ldn. */
next_ldn(host_index)++;
if (next_ldn(host_index) >= MAX_LOG_DEV)
next_ldn(host_index) = 7;
if (current_ldn == next_ldn(host_index)) { /* One circle done ? */
/* no non-processing ldn found */
scmd_printk(KERN_WARNING, cmd,
"IBM MCA SCSI: Cannot assign SCSI-device dynamically!\n"
" On ldn 7-14 SCSI-commands everywhere in progress.\n"
" Reporting DID_NO_CONNECT for device.\n");
cmd->result = DID_NO_CONNECT << 16; /* return no connect */
if (done)
done(cmd);
return 0;
}
}
/* unmap non-processing ldn */
for (id = 0; id < max_pun; id++)
for (lun = 0; lun < 8; lun++) {
if (get_ldn(host_index)[id][lun] == next_ldn(host_index)) {
get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE;
get_scsi(host_index)[id][lun] = TYPE_NO_DEVICE;
/* unmap entry */
}
}
/* set reduced interrupt_handler-mode for checking */
local_checking_phase_flag(host_index) = 1;
/* map found ldn to pun,lun */
get_ldn(host_index)[target][cmd->device->lun] = next_ldn(host_index);
/* change ldn to the right value, that is now next_ldn */
ldn = next_ldn(host_index);
/* unassign all ldns (pun,lun,ldn does not matter for remove) */
immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
/* set only LDN for remapped device */
immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN);
/* get device information for ld[ldn] */
if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) {
ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because
devices that were not assigned,
should have nothing in progress. */
get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type;
/* increase assignment counters for statistics in /proc */
IBM_DS(host_index).dynamical_assignments++;
IBM_DS(host_index).ldn_assignments[ldn]++;
} else
/* panic here, because a device, found at boottime has
vanished */
panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun);
/* unassign again all ldns (pun,lun,ldn does not matter for remove) */
immediate_assign(host_index, 0, 0, 0, REMOVE_LDN);
/* remap all ldns, as written in the pun/lun table */
lun = 0;
#ifdef CONFIG_SCSI_MULTI_LUN
for (lun = 0; lun < 8; lun++)
#endif
for (id = 0; id < max_pun; id++) {
if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV)
immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN);
}
/* set back to normal interrupt_handling */
local_checking_phase_flag(host_index) = 0;
#ifdef IM_DEBUG_PROBE
/* Information on syslog terminal */
printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun);
#endif
/* increase next_ldn for next dynamical assignment */
next_ldn(host_index)++;
if (next_ldn(host_index) >= MAX_LOG_DEV)
next_ldn(host_index) = 7;
} else { /* wall against Linux accesses to the subsystem adapter */
cmd->result = DID_BAD_TARGET << 16;
if (done)
done(cmd);
return 0;
}
}
/*verify there is no command already in progress for this log dev */
if (ld(host_index)[ldn].cmd)
panic("IBM MCA SCSI: cmd already in progress for this ldn.\n");
/*save done in cmd, and save cmd for the interrupt handler */
cmd->scsi_done = done;
ld(host_index)[ldn].cmd = cmd;
/*fill scb information independent of the scsi command */
scb = &(ld(host_index)[ldn].scb);
ld(host_index)[ldn].tsb.dev_status = 0;
scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE;
scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb));
scsi_cmd = cmd->cmnd[0];
if (cmd->use_sg) {
i = cmd->use_sg;
sl = (struct scatterlist *) (cmd->request_buffer);
if (i > 16)
panic("IBM MCA SCSI: scatter-gather list too long.\n");
while (--i >= 0) {
ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset);
ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
}
scb->enable |= IM_POINTER_TO_LIST;
scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0]));
scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge);
} else {
scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer);
/* recent Linux midlevel SCSI places 1024 byte for inquiry
* command. Far too much for old PS/2 hardware. */
switch (scsi_cmd) {
/* avoid command errors by setting bufferlengths to
* ANSI-standard. Beware of forcing it to 255,
* this could SEGV the kernel!!! */
case INQUIRY:
case REQUEST_SENSE:
case MODE_SENSE:
case MODE_SELECT:
if (cmd->request_bufflen > 255)
scb->sys_buf_length = 255;
else
scb->sys_buf_length = cmd->request_bufflen;
break;
case TEST_UNIT_READY:
scb->sys_buf_length = 0;
break;
default:
scb->sys_buf_length = cmd->request_bufflen;
break;
}
}
/*fill scb information dependent on scsi command */
#ifdef IM_DEBUG_CMD
printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn);
#endif
/* for specific device-type debugging: */
#ifdef IM_DEBUG_CMD_SPEC_DEV
if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE)
printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn);
#endif
/* for possible panics store current command */
last_scsi_command(host_index)[ldn] = scsi_cmd;
last_scsi_type(host_index)[ldn] = IM_SCB;
/* update statistical info */
IBM_DS(host_index).total_accesses++;
IBM_DS(host_index).ldn_access[ldn]++;
switch (scsi_cmd) {
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
case READ_12:
case WRITE_12:
/* Distinguish between disk and other devices. Only disks (that are the
most frequently accessed devices) should be supported by the
IBM-SCSI-Subsystem commands. */
switch (ld(host_index)[ldn].device_type) {
case TYPE_DISK: /* for harddisks enter here ... */
case TYPE_MOD: /* ... try it also for MO-drives (send flames as */
/* you like, if this won't work.) */
if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) {
/* read command preparations */
scb->enable |= IM_READ_CONTROL;
IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */
scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT;
} else { /* write command preparations */
IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */
scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT;
}
if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) {
scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16);
scb->u2.blk.count = (unsigned) cmd->cmnd[4];
} else {
scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24);
scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8);
}
last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr;
last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count;
scb->u2.blk.length = ld(host_index)[ldn].block_length;
break;
/* for other devices, enter here. Other types are not known by
Linux! TYPE_NO_LUN is forbidden as valid device. */
case TYPE_ROM:
case TYPE_TAPE:
case TYPE_PROCESSOR:
case TYPE_WORM:
case TYPE_SCANNER:
case TYPE_MEDIUM_CHANGER:
/* If there is a sequential-device, IBM recommends to use
IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE.
This includes CD-ROM devices, too, due to the partial sequential
read capabilities. */
scb->command = IM_OTHER_SCSI_CMD_CMD;
if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12)
/* enable READ */
scb->enable |= IM_READ_CONTROL;
scb->enable |= IM_BYPASS_BUFFER;
scb->u1.scsi_cmd_length = cmd->cmd_len;
memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
/* Read/write on this non-disk devices is also displayworthy,
so flash-up the LED/display. */
break;
}
break;
case INQUIRY:
IBM_DS(host_index).ldn_inquiry_access[ldn]++;
scb->command = IM_DEVICE_INQUIRY_CMD;
scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
scb->u1.log_blk_adr = 0;
break;
case TEST_UNIT_READY:
scb->command = IM_OTHER_SCSI_CMD_CMD;
scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
scb->u1.log_blk_adr = 0;
scb->u1.scsi_cmd_length = 6;
memcpy(scb->u2.scsi_command, cmd->cmnd, 6);
last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
break;
case READ_CAPACITY:
/* the length of system memory buffer must be exactly 8 bytes */
scb->command = IM_READ_CAPACITY_CMD;
scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER;
if (scb->sys_buf_length > 8)
scb->sys_buf_length = 8;
break;
/* Commands that need read-only-mode (system <- device): */
case REQUEST_SENSE:
scb->command = IM_REQUEST_SENSE_CMD;
scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
break;
/* Commands that need write-only-mode (system -> device): */
case MODE_SELECT:
case MODE_SELECT_10:
IBM_DS(host_index).ldn_modeselect_access[ldn]++;
scb->command = IM_OTHER_SCSI_CMD_CMD;
scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */
scb->u1.scsi_cmd_length = cmd->cmd_len;
memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
break;
/* For other commands, read-only is useful. Most other commands are
running without an input-data-block. */
default:
scb->command = IM_OTHER_SCSI_CMD_CMD;
scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER;
scb->u1.scsi_cmd_length = cmd->cmd_len;
memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len);
last_scsi_type(host_index)[ldn] = IM_LONG_SCB;
break;
}
/*issue scb command, and return */
if (++disk_rw_in_progress == 1)
PS2_DISK_LED_ON(shpnt->host_no, target);
if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) {
issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn);
IBM_DS(host_index).long_scbs++;
} else {
issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn);
IBM_DS(host_index).scbs++;
}
return 0;
}
static int __ibmmca_abort(Scsi_Cmnd * cmd)
{
/* Abort does not work, as the adapter never generates an interrupt on
* whatever situation is simulated, even when really pending commands
* are running on the adapters' hardware ! */
struct Scsi_Host *shpnt;
unsigned int ldn;
void (*saved_done) (Scsi_Cmnd *);
int target;
int host_index;
int max_pun;
unsigned long imm_command;
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Abort subroutine called...\n");
#endif
shpnt = cmd->device->host;
/* search for the right hostadapter */
for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
if (!hosts[host_index]) { /* invalid hostadapter descriptor address */
cmd->result = DID_NO_CONNECT << 16;
if (cmd->scsi_done)
(cmd->scsi_done) (cmd);
shpnt = cmd->device->host;
#ifdef IM_DEBUG_PROBE
printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n");
#endif
return SUCCESS;
}
max_pun = subsystem_maxid(host_index);
if (ibm_ansi_order) {
target = max_pun - 1 - cmd->device->id;
if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index)))
target--;
else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index)))
target++;
} else
target = cmd->device->id;
/* get logical device number, and disable system interrupts */
printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun);
ldn = get_ldn(host_index)[target][cmd->device->lun];
/*if cmd for this ldn has already finished, no need to abort */
if (!ld(host_index)[ldn].cmd) {
return SUCCESS;
}
/* Clear ld.cmd, save done function, install internal done,
* send abort immediate command (this enables sys. interrupts),
* and wait until the interrupt arrives.
*/
saved_done = cmd->scsi_done;
cmd->scsi_done = internal_done;
cmd->SCp.Status = 0;
last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD;
last_scsi_type(host_index)[ldn] = IM_IMM_CMD;
imm_command = inl(IM_CMD_REG(host_index));
imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
imm_command |= (unsigned long) (IM_ABORT_IMM_CMD);
/* must wait for attention reg not busy */
/* FIXME - timeout, politeness */
while (1) {
if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
break;
}
/* write registers and enable system interrupts */
outl(imm_command, IM_CMD_REG(host_index));
outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Abort queued to adapter...\n");
#endif
spin_unlock_irq(shpnt->host_lock);
while (!cmd->SCp.Status)
yield();
spin_lock_irq(shpnt->host_lock);
cmd->scsi_done = saved_done;
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Abort returned with adapter response...\n");
#endif
/*if abort went well, call saved done, then return success or error */
if (cmd->result == (DID_ABORT << 16))
{
cmd->result |= DID_ABORT << 16;
if (cmd->scsi_done)
(cmd->scsi_done) (cmd);
ld(host_index)[ldn].cmd = NULL;
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Abort finished with success.\n");
#endif
return SUCCESS;
} else {
cmd->result |= DID_NO_CONNECT << 16;
if (cmd->scsi_done)
(cmd->scsi_done) (cmd);
ld(host_index)[ldn].cmd = NULL;
#ifdef IM_DEBUG_PROBE
printk("IBM MCA SCSI: Abort failed.\n");
#endif
return FAILED;
}
}
static int ibmmca_abort(Scsi_Cmnd * cmd)
{
struct Scsi_Host *shpnt = cmd->device->host;
int rc;
spin_lock_irq(shpnt->host_lock);
rc = __ibmmca_abort(cmd);
spin_unlock_irq(shpnt->host_lock);
return rc;
}
static int __ibmmca_host_reset(Scsi_Cmnd * cmd)
{
struct Scsi_Host *shpnt;
Scsi_Cmnd *cmd_aid;
int ticks, i;
int host_index;
unsigned long imm_command;
if (cmd == NULL)
BUG();
ticks = IM_RESET_DELAY * HZ;
shpnt = cmd->device->host;
/* search for the right hostadapter */
for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++);
if (!hosts[host_index]) /* invalid hostadapter descriptor address */
return FAILED;
if (local_checking_phase_flag(host_index)) {
printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n");
return FAILED;
}
/* issue reset immediate command to subsystem, and wait for interrupt */
printk("IBM MCA SCSI: resetting all devices.\n");
reset_status(host_index) = IM_RESET_IN_PROGRESS;
last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD;
last_scsi_type(host_index)[0xf] = IM_IMM_CMD;
imm_command = inl(IM_CMD_REG(host_index));
imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */
imm_command |= (unsigned long) (IM_RESET_IMM_CMD);
/* must wait for attention reg not busy */
while (1) {
if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY))
break;
spin_unlock_irq(shpnt->host_lock);
yield();
spin_lock_irq(shpnt->host_lock);
}
/*write registers and enable system interrupts */
outl(imm_command, IM_CMD_REG(host_index));
outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index));
/* wait for interrupt finished or intr_stat register to be set, as the
* interrupt will not be executed, while we are in here! */
/* FIXME: This is really really icky we so want a sleeping version of this ! */
while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) {
udelay((1 + 999 / HZ) * 1000);
barrier();
}
/* if reset did not complete, just return an error */
if (!ticks) {
printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY);
reset_status(host_index) = IM_RESET_FINISHED_FAIL;
return FAILED;
}
if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) {
/* analysis done by this routine and not by the intr-routine */
if (inb(IM_INTR_REG(host_index)) == 0xaf)
reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT;
else if (inb(IM_INTR_REG(host_index)) == 0xcf)
reset_status(host_index) = IM_RESET_FINISHED_FAIL;
else /* failed, 4get it */
reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT;
outb(IM_EOI | 0xf, IM_ATTN_REG(host_index));
}
/* if reset failed, just return an error */
if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) {
printk(KERN_ERR "IBM MCA SCSI: reset failed.\n");
return FAILED;
}
/* so reset finished ok - call outstanding done's, and return success */
printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n");
for (i = 0; i < MAX_LOG_DEV; i++) {
cmd_aid = ld(host_index)[i].cmd;
if (cmd_aid && cmd_aid->scsi_done) {
ld(host_index)[i].cmd = NULL;
cmd_aid->result = DID_RESET << 16;
}
}
return SUCCESS;
}
static int ibmmca_host_reset(Scsi_Cmnd * cmd)
{
struct Scsi_Host *shpnt = cmd->device->host;
int rc;
spin_lock_irq(shpnt->host_lock);
rc = __ibmmca_host_reset(cmd);
spin_unlock_irq(shpnt->host_lock);
return rc;
}
static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info)
{
int size = capacity;
info[0] = 64;
info[1] = 32;
info[2] = size / (info[0] * info[1]);
if (info[2] >= 1024) {
info[0] = 128;
info[1] = 63;
info[2] = size / (info[0] * info[1]);
if (info[2] >= 1024) {
info[0] = 255;
info[1] = 63;
info[2] = size / (info[0] * info[1]);
if (info[2] >= 1024)
info[2] = 1023;
}
}
return 0;
}
/* calculate percentage of total accesses on a ldn */
static int ldn_access_load(int host_index, int ldn)
{
if (IBM_DS(host_index).total_accesses == 0)
return (0);
if (IBM_DS(host_index).ldn_access[ldn] == 0)
return (0);
return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses;
}
/* calculate total amount of r/w-accesses */
static int ldn_access_total_read_write(int host_index)
{
int a;
int i;
a = 0;
for (i = 0; i <= MAX_LOG_DEV; i++)
a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i];
return (a);
}
static int ldn_access_total_inquiry(int host_index)
{
int a;
int i;
a = 0;
for (i = 0; i <= MAX_LOG_DEV; i++)
a += IBM_DS(host_index).ldn_inquiry_access[i];
return (a);
}
static int ldn_access_total_modeselect(int host_index)
{
int a;
int i;
a = 0;
for (i = 0; i <= MAX_LOG_DEV; i++)
a += IBM_DS(host_index).ldn_modeselect_access[i];
return (a);
}
/* routine to display info in the proc-fs-structure (a deluxe feature) */
static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
{
int len = 0;
int i, id, lun, host_index;
unsigned long flags;
int max_pun;
for (i = 0; hosts[i] && hosts[i] != shpnt; i++);
spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */
host_index = i;
if (!shpnt) {
len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter");
return len;
}
max_pun = subsystem_maxid(host_index);
len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION);
len += sprintf(buffer + len, " SCSI Access-Statistics:\n");
len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
#ifdef CONFIG_SCSI_MULTI_LUN
len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n");
#else
len += sprintf(buffer + len, " Multiple LUN probing.....: No\n");
#endif
len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no);
len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index)));
len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ);
len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts);
len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses);
len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs);
len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs);
len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index));
len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index));
len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index));
len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index)
- ldn_access_total_modeselect(host_index)
- ldn_access_total_inquiry(host_index));
len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors);
len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n");
len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n");
len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n");
for (i = 0; i <= MAX_LOG_DEV; i++)
len += sprintf(buffer + len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]);
len += sprintf(buffer + len, " -----------------------------------------------------------\n\n");
len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n");
len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices);
len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index));
len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments);
len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n");
len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n");
len += sprintf(buffer + len, " ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n");
for (id = 0; id < max_pun; id++) {
len += sprintf(buffer + len, " %2d ", id);
for (lun = 0; lun < 8; lun++)
len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun]));
len += sprintf(buffer + len, " %2d ", id);
for (lun = 0; lun < 8; lun++)
len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun]));
len += sprintf(buffer + len, "\n");
}
len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n");
len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n");
len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n");
*start = buffer + offset;
len -= offset;
if (len > length)
len = length;
spin_unlock_irqrestore(shpnt->host_lock, flags);
return len;
}
static int option_setup(char *str)
{
int ints[IM_MAX_HOSTS];
char *cur = str;
int i = 1;
while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) {
ints[i++] = simple_strtoul(cur, NULL, 0);
if ((cur = strchr(cur, ',')) != NULL)
cur++;
}
ints[0] = i - 1;
internal_ibmmca_scsi_setup(cur, ints);
return 0;
}
__setup("ibmmcascsi=", option_setup);
static struct scsi_host_template driver_template = {
.proc_name = "ibmmca",
.proc_info = ibmmca_proc_info,
.name = "IBM SCSI-Subsystem",
.detect = ibmmca_detect,
.release = ibmmca_release,
.queuecommand = ibmmca_queuecommand,
.eh_abort_handler = ibmmca_abort,
.eh_host_reset_handler = ibmmca_host_reset,
.bios_param = ibmmca_biosparam,
.can_queue = 16,
.this_id = 7,
.sg_tablesize = 16,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"
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