/drivers/scsi/ibmmca.c
C | 2378 lines | 2108 code | 87 blank | 183 comment | 118 complexity | 84aad5e25bd1634263792bd628c59890 MD5 | raw file
Possible License(s): CC-BY-SA-3.0, GPL-2.0, LGPL-2.0, AGPL-1.0
Large files files are truncated, but you can click here to view the full file
/* Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for Linux Kernel >= 2.4.0. Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU General Public License. Written by Martin Kolinek, December 1995. Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang See the file Documentation/scsi/ibmmca.txt for a detailed description of this driver, the commandline arguments and the history of its development. See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest updates, info and ADF-files for adapters supported by this driver. Alan Cox <alan@lxorguk.ukuu.org.uk> Updated for Linux 2.5.45 to use the new error handler, cleaned up the lock macros and did a few unavoidable locking tweaks, plus one locking fix in the irq and completion path. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/ctype.h> #include <linux/string.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/blkdev.h> #include <linux/proc_fs.h> #include <linux/stat.h> #include <linux/mca.h> #include <linux/spinlock.h> #include <linux/init.h> #include <asm/system.h> #include <asm/io.h> #include "scsi.h" #include <scsi/scsi_host.h> /* Common forward declarations for all Linux-versions: */ static int ibmmca_queuecommand (Scsi_Cmnd *, void (*done) (Scsi_Cmnd *)); static int ibmmca_abort (Scsi_Cmnd *); static int ibmmca_host_reset (Scsi_Cmnd *); static int ibmmca_biosparam (struct scsi_device *, struct block_device *, sector_t, int *); static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout); /* current version of this driver-source: */ #define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac" /* driver configuration */ #define IM_MAX_HOSTS 8 /* maximum number of host adapters */ #define IM_RESET_DELAY 60 /* seconds allowed for a reset */ /* driver debugging - #undef all for normal operation */ /* if defined: count interrupts and ignore this special one: */ #undef IM_DEBUG_TIMEOUT //50 #define TIMEOUT_PUN 0 #define TIMEOUT_LUN 0 /* verbose interrupt: */ #undef IM_DEBUG_INT /* verbose queuecommand: */ #undef IM_DEBUG_CMD /* verbose queucommand for specific SCSI-device type: */ #undef IM_DEBUG_CMD_SPEC_DEV /* verbose device probing */ #undef IM_DEBUG_PROBE /* device type that shall be displayed on syslog (only during debugging): */ #define IM_DEBUG_CMD_DEVICE TYPE_TAPE /* relative addresses of hardware registers on a subsystem */ #define IM_CMD_REG(h) ((h)->io_port) /*Command Interface, (4 bytes long) */ #define IM_ATTN_REG(h) ((h)->io_port+4) /*Attention (1 byte) */ #define IM_CTR_REG(h) ((h)->io_port+5) /*Basic Control (1 byte) */ #define IM_INTR_REG(h) ((h)->io_port+6) /*Interrupt Status (1 byte, r/o) */ #define IM_STAT_REG(h) ((h)->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); } /* 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 #define IBM_INTEGSCSI 5 /* other special flags for hostdata structure */ #define FORCED_DETECTION 100 #define INTEGRATED_SCSI 101 /* List of possible IBM-SCSI-adapters */ static short ibmmca_id_table[] = { 0x8efc, 0x8efd, 0x8ef8, 0x8eff, 0x8efe, /* No entry for integrated SCSI, that's part of the register */ 0 }; static const char *ibmmca_description[] = { "IBM SCSI-2 F/W Adapter", /* special = 0 */ "IBM 7568 Industrial Computer SCSI Adapter w/Cache", /* special = 1 */ "IBM Expansion Unit SCSI Controller", /* special = 2 */ "IBM SCSI Adapter w/Cache", /* special = 3 */ "IBM SCSI Adapter", /* special = 4 */ "IBM Integrated SCSI Controller", /* special = 5 */ }; /* 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(h) ((h)->this_id) #define subsystem_maxid(h) ((h)->max_id) #define ld(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_ld) #define get_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_ldn) #define get_scsi(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_get_scsi) #define local_checking_phase_flag(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_local_checking_phase_flag) #define got_interrupt(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_got_interrupt) #define stat_result(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_stat_result) #define reset_status(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_reset_status) #define last_scsi_command(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_command) #define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type) #define last_scsi_blockcount(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_blockcount) #define last_scsi_logical_block(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_logical_block) #define last_scsi_type(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_last_scsi_type) #define next_ldn(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_next_ldn) #define IBM_DS(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_IBM_DS) #define special(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_special) #define subsystem_connector_size(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_connector_size) #define adapter_speed(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_adapter_speed) #define pos2(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[2]) #define pos3(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[3]) #define pos4(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[4]) #define pos5(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[5]) #define pos6(h) (((struct ibmmca_hostdata *) (h)->hostdata)->_pos[6]) /* Define a arbitrary number as subsystem-marker-type. This number is, as described in the ANSI-SCSI-standard, not occupied by other device-types. */ #define TYPE_IBM_SCSI_ADAPTER 0x2F /* Define 0xFF for no device type, because this type is not defined within the ANSI-SCSI-standard, therefore, it can be used and should not cause any harm. */ #define TYPE_NO_DEVICE 0xFF /* define medium-changer. If this is not defined previously, e.g. Linux 2.0.x, define this type here. */ #ifndef TYPE_MEDIUM_CHANGER #define TYPE_MEDIUM_CHANGER 0x08 #endif /* define possible operations for the immediate_assign command */ #define SET_LDN 0 #define REMOVE_LDN 1 /* ldn which is used to probe the SCSI devices */ #define PROBE_LDN 0 /* reset status flag contents */ #define IM_RESET_NOT_IN_PROGRESS 0 #define IM_RESET_IN_PROGRESS 1 #define IM_RESET_FINISHED_OK 2 #define IM_RESET_FINISHED_FAIL 3 #define IM_RESET_NOT_IN_PROGRESS_NO_INT 4 #define IM_RESET_FINISHED_OK_NO_INT 5 /* define undefined SCSI-command */ #define NO_SCSI 0xffff /*-----------------------------------------------------------------------*/ /* if this is nonzero, ibmmcascsi option has been passed to the kernel */ static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 }; static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 }; /* fill module-parameters only, when this define is present. (that is kernel version 2.1.x) */ #if defined(MODULE) static char *boot_options = NULL; module_param(boot_options, charp, 0); module_param_array(io_port, int, NULL, 0); module_param_array(scsi_id, int, NULL, 0); MODULE_LICENSE("GPL"); #endif /*counter of concurrent disk read/writes, to turn on/off disk led */ static int disk_rw_in_progress = 0; static unsigned int pos[8]; /* whole pos register-line for diagnosis */ /* Taking into account the additions, made by ZP Gu. * This selects now the preset value from the configfile and * offers the 'normal' commandline option to be accepted */ #ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD static char ibm_ansi_order = 1; #else static char ibm_ansi_order = 0; #endif static void issue_cmd(struct Scsi_Host *, unsigned long, unsigned char); static void internal_done(Scsi_Cmnd * cmd); static void check_devices(struct Scsi_Host *, int); static int immediate_assign(struct Scsi_Host *, unsigned int, unsigned int, unsigned int, unsigned int); static int immediate_feature(struct Scsi_Host *, unsigned int, unsigned int); #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET static int immediate_reset(struct Scsi_Host *, unsigned int); #endif static int device_inquiry(struct Scsi_Host *, int); static int read_capacity(struct Scsi_Host *, int); static int get_pos_info(struct Scsi_Host *); 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(struct Scsi_Host *); static int device_exists(struct Scsi_Host *, int, int *, int *); static int option_setup(char *); /* local functions needed for proc_info */ static int ldn_access_load(struct Scsi_Host *, int); static int ldn_access_total_read_write(struct Scsi_Host *); static irqreturn_t interrupt_handler(int irq, void *dev_id) { unsigned int intr_reg; unsigned int cmd_result; unsigned int ldn; unsigned long flags; Scsi_Cmnd *cmd; int lastSCSI; struct device *dev = dev_id; struct Scsi_Host *shpnt = dev_get_drvdata(dev); spin_lock_irqsave(shpnt->host_lock, flags); if(!(inb(IM_STAT_REG(shpnt)) & IM_INTR_REQUEST)) { spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_NONE; } /* the reset-function already did all the job, even ints got renabled on the subsystem, so just return */ if ((reset_status(shpnt) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(shpnt) == IM_RESET_FINISHED_OK_NO_INT)) { reset_status(shpnt) = IM_RESET_NOT_IN_PROGRESS; spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } /*must wait for attention reg not busy, then send EOI to subsystem */ while (1) { if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY)) break; cpu_relax(); } /*get command result and logical device */ intr_reg = (unsigned char) (inb(IM_INTR_REG(shpnt))); cmd_result = intr_reg & 0xf0; ldn = intr_reg & 0x0f; /* get the last_scsi_command here */ lastSCSI = last_scsi_command(shpnt)[ldn]; outb(IM_EOI | ldn, IM_ATTN_REG(shpnt)); /*these should never happen (hw fails, or a local programming bug) */ if (!global_command_error_excuse) { switch (cmd_result) { /* Prevent from Ooopsing on error to show the real reason */ case IM_ADAPTER_HW_FAILURE: case IM_SOFTWARE_SEQUENCING_ERROR: case IM_CMD_ERROR: printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n"); printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(shpnt)[ldn].scb.enable); if (ld(shpnt)[ldn].cmd) printk("%ld/%ld,", (long) (scsi_bufflen(ld(shpnt)[ldn].cmd)), (long) (ld(shpnt)[ldn].scb.sys_buf_length)); else printk("none,"); if (ld(shpnt)[ldn].cmd) printk("Blocksize=%d", ld(shpnt)[ldn].scb.u2.blk.length); else printk("Blocksize=none"); printk(", host=%p, ldn=0x%x\n", shpnt, ldn); if (ld(shpnt)[ldn].cmd) { printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(shpnt)[ldn], ld(shpnt)[ldn].scb.u2.blk.count); printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(shpnt)[ldn], ld(shpnt)[ldn].scb.u1.log_blk_adr); } printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN"); /* if errors appear, enter this section to give detailed info */ printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n"); printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(shpnt)[ldn]); printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(shpnt))); printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(shpnt))); printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg); printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(shpnt))); if ((last_scsi_type(shpnt)[ldn] == IM_SCB) || (last_scsi_type(shpnt)[ldn] == IM_LONG_SCB)) { printk(KERN_ERR " SCB-Command.................: %x\n", ld(shpnt)[ldn].scb.command); printk(KERN_ERR " SCB-Enable..................: %x\n", ld(shpnt)[ldn].scb.enable); printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(shpnt)[ldn].scb.u1.log_blk_adr); printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(shpnt)[ldn].scb.sys_buf_adr); printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(shpnt)[ldn].scb.sys_buf_length); printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(shpnt)[ldn].scb.tsb_adr); printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(shpnt)[ldn].scb.scb_chain_adr); printk(KERN_ERR " SCB-block count.............: %x\n", ld(shpnt)[ldn].scb.u2.blk.count); printk(KERN_ERR " SCB-block length............: %x\n", ld(shpnt)[ldn].scb.u2.blk.length); } printk(KERN_ERR " Send this report to the maintainer.\n"); panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result); break; } } else { /* The command error handling is made silent, but we tell the * calling function, that there is a reported error from the * adapter. */ switch (cmd_result) { case IM_ADAPTER_HW_FAILURE: case IM_SOFTWARE_SEQUENCING_ERROR: case IM_CMD_ERROR: global_command_error_excuse = CMD_FAIL; break; default: global_command_error_excuse = 0; break; } } /* if no panic appeared, increase the interrupt-counter */ IBM_DS(shpnt).total_interrupts++; /*only for local checking phase */ if (local_checking_phase_flag(shpnt)) { stat_result(shpnt) = cmd_result; got_interrupt(shpnt) = 1; reset_status(shpnt) = IM_RESET_FINISHED_OK; last_scsi_command(shpnt)[ldn] = NO_SCSI; spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } /* handling of commands coming from upper level of scsi driver */ if (last_scsi_type(shpnt)[ldn] == IM_IMM_CMD) { /* verify ldn, and may handle rare reset immediate command */ if ((reset_status(shpnt) == IM_RESET_IN_PROGRESS) && (last_scsi_command(shpnt)[ldn] == IM_RESET_IMM_CMD)) { if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) { disk_rw_in_progress = 0; PS2_DISK_LED_OFF(); reset_status(shpnt) = IM_RESET_FINISHED_FAIL; } else { /*reset disk led counter, turn off disk led */ disk_rw_in_progress = 0; PS2_DISK_LED_OFF(); reset_status(shpnt) = IM_RESET_FINISHED_OK; } stat_result(shpnt) = cmd_result; last_scsi_command(shpnt)[ldn] = NO_SCSI; last_scsi_type(shpnt)[ldn] = 0; spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } else if (last_scsi_command(shpnt)[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(shpnt)[ldn].cmd; ld(shpnt)[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(shpnt) = cmd_result; last_scsi_command(shpnt)[ldn] = NO_SCSI; last_scsi_type(shpnt)[ldn] = 0; if (cmd->scsi_done) (cmd->scsi_done) (cmd); /* should be the internal_done */ spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } else { disk_rw_in_progress = 0; PS2_DISK_LED_OFF(); reset_status(shpnt) = IM_RESET_FINISHED_OK; stat_result(shpnt) = cmd_result; last_scsi_command(shpnt)[ldn] = NO_SCSI; spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } } last_scsi_command(shpnt)[ldn] = NO_SCSI; last_scsi_type(shpnt)[ldn] = 0; cmd = ld(shpnt)[ldn].cmd; ld(shpnt)[ldn].cmd = NULL; #ifdef IM_DEBUG_TIMEOUT if (cmd) { if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) { spin_unlock_irqsave(shpnt->host_lock, flags); printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun); return IRQ_HANDLED; } } #endif /*if no command structure, just return, else clear cmd */ if (!cmd) { spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } #ifdef IM_DEBUG_INT printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(shpnt)[ldn].tsb.dev_status, ld(shpnt)[ldn].tsb.cmd_status, ld(shpnt)[ldn].tsb.dev_error, ld(shpnt)[ldn].tsb.cmd_error); #endif /*if this is end of media read/write, may turn off PS/2 disk led */ if ((ld(shpnt)[ldn].device_type != TYPE_NO_LUN) && (ld(shpnt)[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(shpnt)[ldn].tsb.dev_status & 0x1e); IBM_DS(shpnt).total_errors++; } else cmd->result = 0; /* write device status into cmd->result, and call done function */ if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */ cmd->result |= DID_BAD_INTR << 16; printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n"); } else /* things went right :-) */ cmd->result |= DID_OK << 16; if (cmd->scsi_done) (cmd->scsi_done) (cmd); spin_unlock_irqrestore(shpnt->host_lock, flags); return IRQ_HANDLED; } static void issue_cmd(struct Scsi_Host *shpnt, unsigned long cmd_reg, unsigned char attn_reg) { unsigned long flags; /* must wait for attention reg not busy */ while (1) { spin_lock_irqsave(shpnt->host_lock, flags); if (!(inb(IM_STAT_REG(shpnt)) & IM_BUSY)) break; spin_unlock_irqrestore(shpnt->host_lock, flags); } /* write registers and enable system interrupts */ outl(cmd_reg, IM_CMD_REG(shpnt)); outb(attn_reg, IM_ATTN_REG(shpnt)); spin_unlock_irqrestore(shpnt->host_lock, flags); } static void internal_done(Scsi_Cmnd * cmd) { cmd->SCp.Status++; return; } /* SCSI-SCB-command for device_inquiry */ static int device_inquiry(struct Scsi_Host *shpnt, int ldn) { int retr; struct im_scb *scb; struct im_tsb *tsb; unsigned char *buf; scb = &(ld(shpnt)[ldn].scb); tsb = &(ld(shpnt)[ldn].tsb); buf = (unsigned char *) (&(ld(shpnt)[ldn].buf)); ld(shpnt)[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(shpnt)[ldn] = IM_DEVICE_INQUIRY_CMD; last_scsi_type(shpnt)[ldn] = IM_SCB; scb->sys_buf_adr = isa_virt_to_bus(buf); scb->sys_buf_length = 255; /* maximum bufferlength gives max info */ scb->tsb_adr = isa_virt_to_bus(tsb); /* issue scb to passed ldn, and busy wait for interrupt */ got_interrupt(shpnt) = 0; issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn); while (!got_interrupt(shpnt)) barrier(); /*if command successful, break */ if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == 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(struct Scsi_Host *shpnt, int ldn) { int retr; struct im_scb *scb; struct im_tsb *tsb; unsigned char *buf; scb = &(ld(shpnt)[ldn].scb); tsb = &(ld(shpnt)[ldn].tsb); buf = (unsigned char *) (&(ld(shpnt)[ldn].buf)); ld(shpnt)[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(shpnt)[ldn] = IM_READ_CAPACITY_CMD; last_scsi_type(shpnt)[ldn] = IM_SCB; scb->sys_buf_adr = isa_virt_to_bus(buf); scb->sys_buf_length = 8; scb->tsb_adr = isa_virt_to_bus(tsb); /*issue scb to passed ldn, and busy wait for interrupt */ got_interrupt(shpnt) = 0; issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | ldn); while (!got_interrupt(shpnt)) barrier(); /*if got capacity, get block length and return one device found */ if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == 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(struct Scsi_Host *shpnt) { int retr; struct im_scb *scb; struct im_tsb *tsb; unsigned char *buf; scb = &(ld(shpnt)[MAX_LOG_DEV].scb); tsb = &(ld(shpnt)[MAX_LOG_DEV].tsb); buf = (unsigned char *) (&(ld(shpnt)[MAX_LOG_DEV].buf)); ld(shpnt)[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(shpnt)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD; last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_SCB; scb->sys_buf_adr = isa_virt_to_bus(buf); if (special(shpnt) == IBM_SCSI2_FW) scb->sys_buf_length = 256; /* get all info from F/W adapter */ else scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */ scb->tsb_adr = isa_virt_to_bus(tsb); /*issue scb to ldn=15, and busy wait for interrupt */ got_interrupt(shpnt) = 0; issue_cmd(shpnt, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV); /* FIXME: timeout */ while (!got_interrupt(shpnt)) barrier(); /*if got POS-stuff, get block length and return one device found */ if ((stat_result(shpnt) == IM_SCB_CMD_COMPLETED) || (stat_result(shpnt) == 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(struct Scsi_Host *shpnt, 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(shpnt)) { 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(shpnt)); 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(shpnt)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD; last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD; got_interrupt(shpnt) = 0; issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV); while (!got_interrupt(shpnt)) barrier(); /*if command successful, break */ if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED) return 1; } if (retr >= 3) return 0; else return 1; } static int immediate_feature(struct Scsi_Host *shpnt, 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(shpnt)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD; last_scsi_type(shpnt)[MAX_LOG_DEV] = IM_IMM_CMD; got_interrupt(shpnt) = 0; /* we need to run into command errors in order to probe for the * right speed! */ global_command_error_excuse = 1; issue_cmd(shpnt, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV); /* FIXME: timeout */ while (!got_interrupt(shpnt)) barrier(); if (global_command_error_excuse == CMD_FAIL) { global_command_error_excuse = 0; return 2; } else global_command_error_excuse = 0; /*if command successful, break */ if (stat_result(shpnt) == IM_IMMEDIATE_CMD_COMPLETED) return 1; } if (retr >= 3) return 0; else return 1; } #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET static int immediate_reset(struct Scsi_Host *shpnt, unsigned int ldn) { int retries; int ticks; unsigned long imm_command; for (retries = 0; retries < 3; retries++) { imm_command = inl(IM_CMD_REG(shpnt)); imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */ imm_command |= (unsigned long) (IM_RESET_IMM_CMD); last_scsi_command(shpnt)[ldn] = IM_RESET_IMM_CMD; last_scsi_type(shpnt)[ldn] = IM_IMM_CMD; got_interrupt(shpnt) = 0; reset_status(shpnt) = IM_RESET_IN_PROGRESS; issue_cmd(shpnt, (unsigned long) (imm_command), IM_IMM_CMD | ldn); ticks = IM_RESET_DELAY * HZ; while (reset_status(shpnt) == IM_RESET_IN_PROGRESS && --ticks) { udelay((1 + 999 / HZ) * 1000); barrier(); } /* if reset did not complete, just complain */ if (!ticks) { printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY); reset_status(shpnt) = IM_RESET_FINISHED_OK; /* did not work, finish */ return 1; } /*if command successful, break */ if (stat_result(shpnt) == 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(struct Scsi_Host *shpnt) { struct im_pos_info *info; int num_bus = 0; int ldn; info = (struct im_pos_info *) (&(ld(shpnt)[MAX_LOG_DEV].buf)); if (get_pos_info(shpnt)) { if (info->connector_size & 0xf000) subsystem_connector_size(shpnt) = 16; else subsystem_connector_size(shpnt) = 32; num_bus |= (info->pos_4b & 8) >> 3; for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { if ((special(shpnt) == IBM_SCSI_WCACHE) || (special(shpnt) == IBM_7568_WCACHE)) { if (!((info->cache_stat >> ldn) & 1)) ld(shpnt)[ldn].cache_flag = 0; } if (!((info->retry_stat >> ldn) & 1)) ld(shpnt)[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(shpnt)[ldn].cache_flag); } printk("\nIBM MCA SCSI: SCSI-Retry bits: "); for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { printk("%d", ld(shpnt)[ldn].retry_flag); } printk("\n"); #endif } return num_bus; } /* probing scsi devices */ static void check_devices(struct Scsi_Host *shpnt, 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(shpnt).dyn_flag = 0; /* normally no need for dynamical ldn management */ IBM_DS(shpnt).total_errors = 0; /* set errorcounter to 0 */ next_ldn(shpnt) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */ /* initialize the very important driver-informational arrays/structs */ memset(ld(shpnt), 0, sizeof(ld(shpnt))); for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { last_scsi_command(shpnt)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */ last_scsi_type(shpnt)[ldn] = 0; ld(shpnt)[ldn].cache_flag = 1; ld(shpnt)[ldn].retry_flag = 1; } memset(get_ldn(shpnt), TYPE_NO_DEVICE, sizeof(get_ldn(shpnt))); /* this is essential ! */ memset(get_scsi(shpnt), TYPE_NO_DEVICE, sizeof(get_scsi(shpnt))); /* this is essential ! */ for (lun = 0; lun < 8; lun++) { /* mark the adapter at its pun on all luns */ get_scsi(shpnt)[subsystem_pun(shpnt)][lun] = TYPE_IBM_SCSI_ADAPTER; get_ldn(shpnt)[subsystem_pun(shpnt)][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(shpnt) = global_adapter_speed; speedrun = adapter_speed(shpnt); while (immediate_feature(shpnt, 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(shpnt) = speedrun; /* Get detailed information about the current adapter, necessary for * device operations: */ num_bus = probe_bus_mode(shpnt); /* num_bus contains only valid data for the F/W adapter! */ if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */ /* F/W adapter PUN-space extension evaluation: */ if (num_bus) { printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n"); subsystem_maxid(shpnt) = 16; } else { printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n"); subsystem_maxid(shpnt) = 8; } printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype)); } else /* all other IBM SCSI adapters: */ printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype)); /* assign correct PUN device space */ max_pun = subsystem_maxid(shpnt); #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Current SCSI-host index: %d\n", shpnt); printk("IBM MCA SCSI: Removing default logical SCSI-device mapping."); #else printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New"); #endif for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) { probe_display(1); #ifdef IM_DEBUG_PROBE printk("."); #endif immediate_assign(shpnt, 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(shpnt)) { /* if pun is not the adapter: */ /* set ldn=0 to pun,lun */ immediate_assign(shpnt, id, lun, PROBE_LDN, SET_LDN); if (device_inquiry(shpnt, PROBE_LDN)) { /* probe device */ get_scsi(shpnt)[id][lun] = (unsigned char) (ld(shpnt)[PROBE_LDN].buf[0]); /* entry, even for NO_LUN */ if (ld(shpnt)[PROBE_LDN].buf[0] != TYPE_NO_LUN) count_devices++; /* a existing device is found */ } /* remove ldn */ immediate_assign(shpnt, 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(shpnt)) { if (get_scsi(shpnt)[id][lun] != TYPE_NO_LUN && get_scsi(shpnt)[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(shpnt, id, lun, ldn, SET_LDN); get_ldn(shpnt)[id][lun] = ldn; /* map ldn */ if (device_exists(shpnt, ldn, &ld(shpnt)[ldn].block_length, &ld(shpnt)[ldn].device_type)) { #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET printk("resetting device at ldn=%x ... ", ldn); immediate_reset(shpnt, 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(shpnt)[id][lun] = TYPE_NO_DEVICE; immediate_assign(shpnt, 0, 0, ldn, REMOVE_LDN); } else ldn++; } } else if (lun == 0) { /* map lun == 0, even if no device exists */ immediate_assign(shpnt, id, lun, ldn, SET_LDN); get_ldn(shpnt)[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(shpnt)[id][lun] == TYPE_NO_LUN || get_scsi(shpnt)[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(shpnt, id, lun, ldn, SET_LDN); get_ldn(shpnt)[id][lun] = ldn; ldn++; } } #ifndef IM_DEBUG_PROBE printk("mapped."); #endif printk("\n"); #ifdef IM_DEBUG_PROBE if (ibm_ansi_order) printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n"); else printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n"); #endif #ifdef IM_DEBUG_PROBE /* Show the physical and logical mapping during boot. */ printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n"); printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n"); printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n"); for (id = 0; id < max_pun; id++) { printk("%2d ", id); for (lun = 0; lun < 8; lun++) printk("%2s ", ti_p(get_scsi(shpnt)[id][lun])); printk(" %2d ", id); for (lun = 0; lun < 8; lun++) printk("%2s ", ti_l(get_ldn(shpnt)[id][lun])); printk("\n"); } #endif /* assign total number of found SCSI-devices to the statistics struct */ IBM_DS(shpnt).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(shpnt).dyn_flag = 1; /* dynamical assignment is necessary */ else IBM_DS(shpnt).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(shpnt).scbs = 0; IBM_DS(shpnt).long_scbs = 0; IBM_DS(shpnt).total_accesses = 0; IBM_DS(shpnt).total_interrupts = 0; IBM_DS(shpnt).dynamical_assignments = 0; memset(IBM_DS(shpnt).ldn_access, 0x0, sizeof(IBM_DS(shpnt).ldn_access)); memset(IBM_DS(shpnt).ldn_read_access, 0x0, sizeof(IBM_DS(shpnt).ldn_read_access)); memset(IBM_DS(shpnt).ldn_write_access, 0x0, sizeof(IBM_DS(shpnt).ldn_write_access)); memset(IBM_DS(shpnt).ldn_inquiry_access, 0x0, sizeof(IBM_DS(shpnt).ldn_inquiry_access)); memset(IBM_DS(shpnt).ldn_modeselect_access, 0x0, sizeof(IBM_DS(shpnt).ldn_modeselect_access)); memset(IBM_DS(shpnt).ldn_assignments, 0x0, sizeof(IBM_DS(shpnt).ldn_assignments)); probe_display(0); return; } static int device_exists(struct Scsi_Host *shpnt, int ldn, int *block_length, int *device_type) { unsigned char *buf; /* if no valid device found, return immediately with 0 */ if (!(device_inquiry(shpnt, ldn))) return 0; buf = (unsigned char *) (&(ld(shpnt)[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(shpnt, ldn)) { *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) <…
Large files files are truncated, but you can click here to view the full file