ibmmca.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:96k
- /*
- 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 README.ibmmca 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.
- */
- #ifndef LINUX_VERSION_CODE
- #include <linux/version.h>
- #endif
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
- #error "This driver works only with kernel 2.4.0 or higher!"
- #endif
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/ctype.h>
- #include <linux/string.h>
- #include <linux/ioport.h>
- #include <linux/delay.h>
- #include <linux/sched.h>
- #include <linux/blk.h>
- #include <linux/proc_fs.h>
- #include <linux/stat.h>
- #include <linux/mca.h>
- #include <asm/system.h>
- #include <linux/spinlock.h>
- #include <asm/io.h>
- #include <linux/init.h>
- #include "sd.h"
- #include "scsi.h"
- #include "hosts.h"
- #include "ibmmca.h"
- #include <linux/config.h>
- /* current version of this driver-source: */
- #define IBMMCA_SCSI_DRIVER_VERSION "4.0b"
- #define IBMLOCK spin_lock_irqsave(&io_request_lock, flags);
- #define IBMUNLOCK spin_unlock_irqrestore(&io_request_lock, flags);
- /* 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 */
- 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_PARM(boot_options, "s");
- MODULE_PARM(io_port, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
- MODULE_PARM(scsi_id, "1-" __MODULE_STRING(IM_MAX_HOSTS) "i");
- MODULE_PARM(display, "1i");
- MODULE_PARM(adisplay, "1i");
- MODULE_PARM(normal, "1i");
- MODULE_PARM(ansi, "1i");
- #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 interrupt_handler (int, void *, struct pt_regs *);
- 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(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 void 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;
- unsigned long flags;
- Scsi_Cmnd *cmd;
- int lastSCSI;
- IBMLOCK
- /* 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]) {
- IBMUNLOCK
- return;
- }
- /* 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;
- IBMUNLOCK
- return;
- }
- /*must wait for attention reg not busy, then send EOI to subsystem */
- while (1) {
- if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY)) break;
- IBMUNLOCK /* cycle interrupt */
- IBMLOCK
- }
- 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));
- IBMUNLOCK
- /*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("nIBM MCA SCSI: Fatal Subsystem ERROR!n");
- printk(" 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%xn",ihost_index, ldn);
- if (ld(ihost_index)[ldn].cmd) {
- printk("Blockcount=%d/%dn",last_scsi_blockcount(ihost_index)[ldn],
- ld(ihost_index)[ldn].scb.u2.blk.count);
- printk("Logical block=%lx/%lxn",last_scsi_logical_block(ihost_index)[ldn],
- ld(ihost_index)[ldn].scb.u1.log_blk_adr);
- }
- printk("Reason given: %sn",
- (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("IBM MCA SCSI: Subsystem Error-Status follows:n");
- printk(" Command Type................: %xn",
- last_scsi_type(ihost_index)[ldn]);
- printk(" Attention Register..........: %xn",
- inb (IM_ATTN_REG(ihost_index)));
- printk(" Basic Control Register......: %xn",
- inb (IM_CTR_REG(ihost_index)));
- printk(" Interrupt Status Register...: %xn",
- intr_reg);
- printk(" Basic Status Register.......: %xn",
- 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(" SCB-Command.................: %xn",
- ld(ihost_index)[ldn].scb.command);
- printk(" SCB-Enable..................: %xn",
- ld(ihost_index)[ldn].scb.enable);
- printk(" SCB-logical block address...: %lxn",
- ld(ihost_index)[ldn].scb.u1.log_blk_adr);
- printk(" SCB-system buffer address...: %lxn",
- ld(ihost_index)[ldn].scb.sys_buf_adr);
- printk(" SCB-system buffer length....: %lxn",
- ld(ihost_index)[ldn].scb.sys_buf_length);
- printk(" SCB-tsb address.............: %lxn",
- ld(ihost_index)[ldn].scb.tsb_adr);
- printk(" SCB-Chain address...........: %lxn",
- ld(ihost_index)[ldn].scb.scb_chain_adr);
- printk(" SCB-block count.............: %xn",
- ld(ihost_index)[ldn].scb.u2.blk.count);
- printk(" SCB-block length............: %xn",
- ld(ihost_index)[ldn].scb.u2.blk.length);
- }
- printk(" Send this report to the maintainer.n");
- panic("IBM MCA SCSI: Fatal errormessage 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;
- return;
- }
- /* 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;
- return;
- } 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 */
- return;
- } 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;
- return;
- }
- }
- 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->lun == TIMEOUT_LUN)) {
- printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.n",
- cmd->target, cmd->lun);
- return;
- }
- }
- #endif
- /*if no command structure, just return, else clear cmd */
- if (!cmd) return;
- #ifdef IM_DEBUG_INT
- printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02xn",
- 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);
- return;
- }
- 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) {
- IBMLOCK
- if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) break;
- IBMUNLOCK
- }
- /* write registers and enable system interrupts */
- outl (cmd_reg, IM_CMD_REG(host_index));
- outb (attn_reg, IM_ATTN_REG(host_index));
- IBMUNLOCK
- return;
- }
- 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 = virt_to_bus(buf);
- scb->sys_buf_length = 255; /* maximum bufferlength gives max info */
- scb->tsb_adr = virt_to_bus(tsb);
- /* issue scb to passed ldn, and busy wait for interrupt */
- got_interrupt(host_index) = 0;
- issue_cmd (host_index, 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 = virt_to_bus(buf);
- scb->sys_buf_length = 8;
- scb->tsb_adr = virt_to_bus(tsb);
- /*issue scb to passed ldn, and busy wait for interrupt */
- got_interrupt(host_index) = 0;
- issue_cmd (host_index, 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 = 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 = virt_to_bus(tsb);
- /*issue scb to ldn=15, and busy wait for interrupt */
- got_interrupt(host_index) = 0;
- issue_cmd (host_index, virt_to_bus(scb), IM_SCB | MAX_LOG_DEV);
- 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);
- 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("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("IBM MCA SCSI: Seperate bus mode (wide-addressing enabled)n");
- subsystem_maxid(host_index) = 16;
- } else {
- printk("IBM MCA SCSI: Combined bus mode (wide-addressing disabled)n");
- subsystem_maxid(host_index) = 8;
- }
- printk("IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/sn",
- ibmrate(speedrun,adaptertype));
- } else /* all other IBM SCSI adapters: */
- printk("IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/sn",
- 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: %dn",host_index);
- printk("IBM MCA SCSI: Removing default logical SCSI-device mapping.");
- #else
- printk("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 Mapn");
- printk("ID\LUN 0 1 2 3 4 5 6 7 ID\LUN 0 1 2 3 4 5 6 7n");
- 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;
- }
- 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) {
- token = strtok(str,",");
- j = 0;
- while (token) {
- 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++;
- }
- token = strtok(NULL,",");
- }
- } 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)
- {
- struct Scsi_Host *shpnt;
- int len, speciale, connectore, k;
- unsigned int pos[8];
- unsigned long flags;
- IBMLOCK
- 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 detectedn"
- "***************************************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: integratedn"
- "Chip revision level: %dn"
- "Chip status: %sn"
- "8 kByte NVRAM status: %sn",
- ((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-cardn"
- "ROM Segment Address: ");
- if ((pos[2] & 0xf0) == 0xf0)
- len += sprintf (buf+len, "offn");
- else
- len += sprintf (buf+len, "0x%xn",
- ((pos[2] & 0xf0) << 13) + 0xc0000);
- len += sprintf (buf + len, "Chip status: %sn",
- (pos[2] & 1) ? "enabled" : "disabled");
- len += sprintf (buf + len, "Adapter I/O Offset: 0x%xn",
- ((pos[2] & 0x0e) << 2));
- } else {
- len += sprintf (buf + len, "Adapter category: unknownn");
- }
- /* common subsystem information to write to the slotn file */
- len += sprintf (buf + len, "Subsystem PUN: %dn", shpnt->this_id);
- len += sprintf (buf + len, "I/O base address range: 0x%x-0x%xn",
- (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");
- IBMUNLOCK
- return len;
- }
- int ibmmca_detect (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("IBM MCA SCSI: Version %sn",IBMMCA_SCSI_DRIVER_VERSION);
- /* if this is not MCA machine, return "nothing found" */
- if (!MCA_bus) {
- printk("IBM MCA SCSI: No Microchannel-bus present --> Aborting.n"
- " This machine does not have any IBM MCA-busn"
- " 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("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("IBM MCA SCSI: IBM Integrated SCSI Controller found, io=0x%x, scsi id=%d,n"
- " chip rev.=%d, 8K NVRAM=%s, subsystem=%sn",
- port, id,
- ((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("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!n"
- " SCSI-operations may not work.n");
- }
- if ((i==IBM_SCSI2_FW)&&(pos[6]!=0)) {
- printk("IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!n"
- " Impossible to determine adapter PUN!n"
- " 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("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("IBM MCA SCSI: Unable to get shared IRQ %d.n",
- IM_IRQ_FW);
- } else
- IRQ11_registered++;
- }
- printk("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(" ROM Addr.=off,");
- else
- printk(" ROM Addr.=0x%x,",
- ((pos[2] & 0xf0) << 13) + 0xc0000);
- printk(" port-offset=0x%x, subsystem=%sn",
- ((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("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!n"
- " SCSI-operations may not work.n");
- }
- if ((i==IBM_SCSI2_FW)&&(pos[6]!=0)) {
- printk("IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!n"
- " Impossible to determine adapter PUN!n"
- " 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("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("IBM MCA SCSI: Unable to get shared IRQ %d.n",
- IM_IRQ_FW);
- else
- IRQ11_registered++;
- }
- printk("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(" ROM Addr.=off,");
- else
- printk(" ROM Addr.=0x%x,",
- ((pos[2] & 0xf0) << 13) + 0xc0000);
- printk(" port-offset=0x%x, subsystem=%sn",
- ((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("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(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 (check_region(port, IM_N_IO_PORT)) {
- printk("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("IBM MCA SCSI: Unable to register host.n");
- return NULL;
- }
- /* request I/O region */
- request_region(port, IM_N_IO_PORT, hostname);
- 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: %xn",
- 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;
- }
- int ibmmca_command (Scsi_Cmnd * cmd)
- {
- ibmmca_queuecommand (cmd, internal_done);
- cmd->SCp.Status = 0;
- while (!cmd->SCp.Status) barrier ();
- return cmd->result;
- }
- 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 */
- 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->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->target;
- if ((target <= subsystem_pun(host_index))&&(cmd->target <= subsystem_pun(host_index)))
- target--;
- else if ((target >= subsystem_pun(host_index))&&(cmd->target >= subsystem_pun(host_index)))
- target++;
- } else
- target = cmd->target;
- /* if (target,lun) is NO LUN or not existing at all, return error */
- if ((get_scsi(host_index)[target][cmd->lun] == TYPE_NO_LUN)||
- (get_scsi(host_index)[target][cmd->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->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 */
- printk("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 (%d,%d).n",
- target, cmd->lun);
- 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->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->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->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->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->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 = 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 *)(virt_to_bus(sl[i].address));
- ld(host_index)[ldn].sge[i].byte_length = sl[i].length;
- }
- scb->enable |= IM_POINTER_TO_LIST;
- scb->sys_buf_adr = 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 = 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=%dn", 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=%dn",
- 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, virt_to_bus(scb), IM_LONG_SCB | ldn);
- IBM_DS(host_index).long_scbs++;
- } else {
- issue_cmd (host_index, virt_to_bus(scb), IM_SCB | ldn);
- IBM_DS(host_index).scbs++;
- }
- return 0;
- }
- 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;
- static unsigned long flags;
- unsigned long imm_command;
- #ifdef IM_DEBUG_PROBE
- printk("IBM MCA SCSI: Abort subroutine called...n");
- #endif
- IBMLOCK
- shpnt = cmd->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->host;
- IBMUNLOCK
- #ifdef IM_DEBUG_PROBE
- printk("IBM MCA SCSI: Abort adapter selection failed!n");
- #endif
- return SCSI_ABORT_SNOOZE;
- }
- max_pun = subsystem_maxid(host_index);
- if (ibm_ansi_order) {
- target = max_pun - 1 - cmd->target;
- if ((target <= subsystem_pun(host_index))&&(cmd->target <= subsystem_pun(host_index)))
- target--;
- else if ((target >= subsystem_pun(host_index))&&(cmd->target >= subsystem_pun(host_index)))
- target++;
- } else
- target = cmd->target;
- /* get logical device number, and disable system interrupts */
- printk ("IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.n",
- target, cmd->lun);
- ldn = get_ldn(host_index)[target][cmd->lun];
- /*if cmd for this ldn has already finished, no need to abort */
- if (!ld(host_index)[ldn].cmd) {
- IBMUNLOCK
- return SCSI_ABORT_NOT_RUNNING;
- }
- /* 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 */
- while (1) {
- if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY))
- break;
- IBMUNLOCK
- IBMLOCK
- }
- /* write registers and enable system interrupts */
- outl (imm_command, IM_CMD_REG(host_index));
- outb (IM_IMM_CMD | ldn, IM_ATTN_REG(host_index));
- IBMUNLOCK
- #ifdef IM_DEBUG_PROBE
- printk("IBM MCA SCSI: Abort queued to adapter...n");
- #endif
- while (!cmd->SCp.Status) barrier ();
- 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)) {
- IBMLOCK
- cmd->result |= DID_ABORT << 16;
- if (cmd->scsi_done) (cmd->scsi_done) (cmd);
- ld(host_index)[ldn].cmd = NULL;
- IBMUNLOCK
- #ifdef IM_DEBUG_PROBE
- printk("IBM MCA SCSI: Abort finished with success.n");
- #endif
- return SCSI_ABORT_SUCCESS;
- } else {
- IBMLOCK
- cmd->result |= DID_NO_CONNECT << 16;
- if (cmd->scsi_done) (cmd->scsi_done) (cmd);
- ld(host_index)[ldn].cmd = NULL;
- IBMUNLOCK
- #ifdef IM_DEBUG_PROBE
- printk("IBM MCA SCSI: Abort failed.n");
- #endif
- return SCSI_ABORT_ERROR;
- }
- }
- int ibmmca_reset (Scsi_Cmnd * cmd, unsigned int reset_flags)
- {
- struct Scsi_Host *shpnt;
- Scsi_Cmnd *cmd_aid;
- int ticks,i;
- int host_index;
- static unsigned long flags;
- unsigned long imm_command;
- if (cmd == NULL) {
- printk("IBM MCA SCSI: Reset called with NULL-command!n");
- return(SCSI_RESET_SNOOZE);
- }
- IBMLOCK
- ticks = IM_RESET_DELAY*HZ;
- shpnt = cmd->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 SCSI_ABORT_SNOOZE;
- if (local_checking_phase_flag(host_index)) {
- printk("IBM MCA SCSI: unable to reset while checking devices.n");
- IBMUNLOCK
- return SCSI_RESET_SNOOZE;
- }
- /* 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;
- IBMUNLOCK
- IBMLOCK
- }
- /*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! */
- 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("IBM MCA SCSI: reset did not complete within %d seconds.n",
- IM_RESET_DELAY);
- reset_status(host_index) = IM_RESET_FINISHED_FAIL;
- IBMUNLOCK
- return SCSI_RESET_ERROR;
- }
- 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("IBM MCA SCSI: reset failed.n");
- IBMUNLOCK
- return SCSI_RESET_ERROR;
- }
- /* so reset finished ok - call outstanding done's, and return success */
- printk ("IBM MCA SCSI: Reset successfully completed.n");
- IBMUNLOCK
- 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;
- }
- }
- if (reset_flags & SCSI_RESET_SUGGEST_HOST_RESET)
- return (SCSI_RESET_SUCCESS | SCSI_RESET_HOST_RESET);
- else if (reset_flags & SCSI_RESET_SUGGEST_BUS_RESET)
- return (SCSI_RESET_SUCCESS | SCSI_RESET_BUS_RESET);
- else
- return SCSI_RESET_SUCCESS;
- }
- int ibmmca_biosparam (Disk * disk, kdev_t dev, int *info)
- {
- info[0] = 64;
- info[1] = 32;
- info[2] = disk->capacity / (info[0] * info[1]);
- if (info[2] >= 1024) {
- info[0] = 128;
- info[1] = 63;
- info[2] = disk->capacity / (info[0] * info[1]);
- if (info[2] >= 1024) {
- info[0] = 255;
- info[1] = 63;
- info[2] = disk->capacity / (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) */
- int ibmmca_proc_info (char *buffer, char **start, off_t offset, int length,
- int hostno, int inout)
- {
- int len=0;
- int i,id,lun,host_index;
- struct Scsi_Host *shpnt;
- unsigned long flags;
- int max_pun;
- IBMLOCK
- for (i = 0; hosts[i] && hosts[i]->host_no != hostno; i++);
- shpnt = hosts[i];
- host_index = i;
- if (!shpnt) {
- len += sprintf(buffer+len, "nIBM MCA SCSI: Can't find adapter for host number %dn", hostno);
- return len;
- }
- max_pun = subsystem_maxid(host_index);
- len += sprintf(buffer+len, "n IBM-SCSI-Subsystem-Linux-Driver, Version %snnn",
- IBMMCA_SCSI_DRIVER_VERSION);
- len += sprintf(buffer+len, " SCSI Access-Statistics:n");
- len += sprintf(buffer+len, " Device Scanning Order....: %sn",
- (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard");
- #ifdef CONFIG_SCSI_MULTI_LUN
- len += sprintf(buffer+len, " Multiple LUN probing.....: Yesn");
- #else
- len += sprintf(buffer+len, " Multiple LUN probing.....: Non");
- #endif
- len += sprintf(buffer+len, " This Hostnumber..........: %dn",
- hostno);
- len += sprintf(buffer+len, " Base I/O-Port............: 0x%xn",
- (unsigned int)(IM_CMD_REG(host_index)));
- len += sprintf(buffer+len, " (Shared) IRQ.............: %dn",
- IM_IRQ);
- len += sprintf(buffer+len, " Total Interrupts.........: %dn",
- IBM_DS(host_index).total_interrupts);
- len += sprintf(buffer+len, " Total SCSI Accesses......: %dn",
- IBM_DS(host_index).total_accesses);
- len += sprintf(buffer+len, " Total short SCBs.........: %dn",
- IBM_DS(host_index).scbs);
- len += sprintf(buffer+len, " Total long SCBs..........: %dn",
- IBM_DS(host_index).long_scbs);
- len += sprintf(buffer+len, " Total SCSI READ/WRITE..: %dn",
- ldn_access_total_read_write(host_index));
- len += sprintf(buffer+len, " Total SCSI Inquiries...: %dn",
- ldn_access_total_inquiry(host_index));
- len += sprintf(buffer+len, " Total SCSI Modeselects.: %dn",
- ldn_access_total_modeselect(host_index));
- len += sprintf(buffer+len, " Total SCSI other cmds..: %dn",
- 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.: %dnn",
- 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 | ASSIGNMENTSn");
- len += sprintf(buffer+len, " -----|--------------|-----------|-----------|--------------n");
- for (i=0; i<=MAX_LOG_DEV; i++)
- len += sprintf(buffer+len, " %2X | %3d | %8d | %8d | %8dn",
- 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, " -----------------------------------------------------------nn");
- 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...: %sn",
- IBM_DS(host_index).dyn_flag ? "Yes" : "No ");
- len += sprintf(buffer+len, " Next LDN to be assigned..........: 0x%xn",
- next_ldn(host_index));
- len += sprintf(buffer+len, " Dynamical assignments done yet...: %dn",
- 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 Mapn");
- len += sprintf(buffer+len, " ID\LUN 0 1 2 3 4 5 6 7 ID\LUN 0 1 2 3 4 5 6 7n");
- 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)nn");
- *start = buffer + offset;
- len -= offset;
- if (len > length) len = length;
- IBMUNLOCK
- return len;
- }
- void ibmmca_scsi_setup (char *str, int *ints)
- {
- internal_ibmmca_scsi_setup (str, ints);
- }
- 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 Scsi_Host_Template driver_template = IBMMCA;
- #include "scsi_module.c"