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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [scsi/] [ibmmca.c] - Rev 1765
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/* Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for Linux Kernel >= 2.4.0. Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU General Public License. Written by Martin Kolinek, December 1995. Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang See the file 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%x\n",ihost_index, ldn); if (ld(ihost_index)[ldn].cmd) { printk("Blockcount=%d/%d\n",last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count); printk("Logical block=%lx/%lx\n",last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr); } printk("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("IBM MCA SCSI: Subsystem Error-Status follows:\n"); printk(" Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]); printk(" Attention Register..........: %x\n", inb (IM_ATTN_REG(ihost_index))); printk(" Basic Control Register......: %x\n", inb (IM_CTR_REG(ihost_index))); printk(" Interrupt Status Register...: %x\n", intr_reg); printk(" Basic Status Register.......: %x\n", inb (IM_STAT_REG(ihost_index))); if ((last_scsi_type(ihost_index)[ldn]==IM_SCB)|| (last_scsi_type(ihost_index)[ldn]==IM_LONG_SCB)) { printk(" SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command); printk(" SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable); printk(" SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr); printk(" SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr); printk(" SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length); printk(" SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr); printk(" SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr); printk(" SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count); printk(" SCB-block length............: %x\n", 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=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error); #endif /*if this is end of media read/write, may turn off PS/2 disk led */ if ((ld(ihost_index)[ldn].device_type!=TYPE_NO_LUN)&& (ld(ihost_index)[ldn].device_type!=TYPE_NO_DEVICE)) { /* only access this, if there was a valid device addressed */ if (--disk_rw_in_progress == 0) PS2_DISK_LED_OFF (); } /* IBM describes the status-mask to be 0x1e, but this is not conform * with SCSI-definition, I suppose, the reason for it is that IBM * adapters do not support CMD_TERMINATED, TASK_SET_FULL and * ACA_ACTIVE as returning statusbyte information. (ML) */ if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) { cmd->result = (unsigned char)(ld(ihost_index)[ldn].tsb.dev_status & 0x1e); IBM_DS(ihost_index).total_errors++; } else cmd->result = 0; /* write device status into cmd->result, and call done function */ if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */ cmd->result |= DID_BAD_INTR << 16; printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n"); } else /* things went right :-) */ cmd->result |= DID_OK << 16; if (cmd->scsi_done) (cmd->scsi_done)(cmd); 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/s\n", ibmrate(speedrun,adaptertype)); } else /* all other IBM SCSI adapters: */ printk("IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun,adaptertype)); /* assign correct PUN device space */ max_pun = subsystem_maxid(host_index); #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Current SCSI-host index: %d\n",host_index); printk("IBM MCA SCSI: Removing default logical SCSI-device mapping."); #else printk("IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New"); #endif for (ldn=0; ldn<MAX_LOG_DEV; ldn++) { probe_display(1); #ifdef IM_DEBUG_PROBE printk("."); #endif immediate_assign(host_index,0,0,ldn,REMOVE_LDN); /* remove ldn (wherever)*/ } lun = 0; /* default lun is 0 */ #ifndef IM_DEBUG_PROBE printk("cleared,"); #endif /* STEP 2: */ #ifdef IM_DEBUG_PROBE printk("\nIBM MCA SCSI: Scanning SCSI-devices."); #endif for (id=0; id<max_pun ; id++) #ifdef CONFIG_SCSI_MULTI_LUN for (lun=0; lun<8; lun++) #endif { probe_display(1); #ifdef IM_DEBUG_PROBE printk("."); #endif if (id != subsystem_pun(host_index)) { /* if pun is not the adapter: */ /* set ldn=0 to pun,lun*/ immediate_assign(host_index,id,lun,PROBE_LDN,SET_LDN); if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */ get_scsi(host_index)[id][lun]= (unsigned char)(ld(host_index)[PROBE_LDN].buf[0]); /* entry, even for NO_LUN */ if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN) count_devices++; /* a existing device is found */ } /* remove ldn */ immediate_assign(host_index,id,lun,PROBE_LDN,REMOVE_LDN); } } #ifndef IM_DEBUG_PROBE printk("scanned,"); #endif /* STEP 3: */ #ifdef IM_DEBUG_PROBE printk("\nIBM MCA SCSI: Mapping SCSI-devices."); #endif ldn = 0; lun = 0; #ifdef CONFIG_SCSI_MULTI_LUN for (lun=0; lun<8 && ldn<MAX_LOG_DEV; lun++) #endif for (id=0; id<max_pun && ldn<MAX_LOG_DEV; id++) { probe_display(1); #ifdef IM_DEBUG_PROBE printk("."); #endif if (id != subsystem_pun(host_index)) { if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) { /* Only map if accepted type. Always enter for lun == 0 to get no gaps into ldn-mapping for ldn<7. */ immediate_assign(host_index,id,lun,ldn,SET_LDN); get_ldn(host_index)[id][lun]=ldn; /* map ldn */ if (device_exists (host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) { #ifdef CONFIG_IBMMCA_SCSI_DEV_RESET printk("resetting device at ldn=%x ... ",ldn); immediate_reset(host_index,ldn); #endif ldn++; } else { /* device vanished, probably because we don't know how to * handle it or because it has problems */ if (lun > 0) { /* remove mapping */ get_ldn(host_index)[id][lun]=TYPE_NO_DEVICE; immediate_assign(host_index,0,0,ldn,REMOVE_LDN); } else ldn++; } } else if (lun == 0) { /* map lun == 0, even if no device exists */ immediate_assign(host_index,id,lun,ldn,SET_LDN); get_ldn(host_index)[id][lun]=ldn; /* map ldn */ ldn++; } } } /* STEP 4: */ /* map remaining ldns to non-existing devices */ for (lun=1; lun<8 && ldn<MAX_LOG_DEV; lun++) for (id=0; id<max_pun && ldn<MAX_LOG_DEV; id++) { if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) { probe_display(1); /* Map remaining ldns only to NON-existing pun,lun combinations to make sure an inquiry will fail. For MULTI_LUN, it is needed to avoid adapter autonome SCSI-remapping. */ immediate_assign(host_index,id,lun,ldn,SET_LDN); get_ldn(host_index)[id][lun]=ldn; ldn++; } } #ifndef IM_DEBUG_PROBE printk("mapped."); #endif printk("\n"); #ifdef IM_DEBUG_PROBE if (ibm_ansi_order) printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n"); else printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n"); #endif #ifdef IM_DEBUG_PROBE /* Show the physical and logical mapping during boot. */ printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n"); printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n"); printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n"); for (id=0; id<max_pun; id++) { printk("%2d ",id); for (lun=0; lun<8; lun++) printk("%2s ",ti_p(get_scsi(host_index)[id][lun])); printk(" %2d ",id); for (lun=0; lun<8; lun++) printk("%2s ",ti_l(get_ldn(host_index)[id][lun])); printk("\n"); } #endif /* assign total number of found SCSI-devices to the statistics struct */ IBM_DS(host_index).total_scsi_devices = count_devices; /* decide for output in /proc-filesystem, if the configuration of SCSI-devices makes dynamical reassignment of devices necessary */ if (count_devices>=MAX_LOG_DEV) IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */ else IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */ /* If no SCSI-devices are assigned, return 1 in order to cause message. */ if (ldn == 0) printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n"); /* reset the counters for statistics on the current adapter */ IBM_DS(host_index).scbs = 0; IBM_DS(host_index).long_scbs = 0; IBM_DS(host_index).total_accesses = 0; IBM_DS(host_index).total_interrupts = 0; IBM_DS(host_index).dynamical_assignments = 0; memset (IBM_DS(host_index).ldn_access, 0x0, sizeof (IBM_DS(host_index).ldn_access)); memset (IBM_DS(host_index).ldn_read_access, 0x0, sizeof (IBM_DS(host_index).ldn_read_access)); memset (IBM_DS(host_index).ldn_write_access, 0x0, sizeof (IBM_DS(host_index).ldn_write_access)); memset (IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof (IBM_DS(host_index).ldn_inquiry_access)); memset (IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof (IBM_DS(host_index).ldn_modeselect_access)); memset (IBM_DS(host_index).ldn_assignments, 0x0, sizeof (IBM_DS(host_index).ldn_assignments)); probe_display(0); return; } static int device_exists (int host_index, int ldn, int *block_length, int *device_type) { unsigned char *buf; /* if no valid device found, return immediately with 0 */ if (!(device_inquiry(host_index, ldn))) return 0; buf = (unsigned char *)(&(ld(host_index)[ldn].buf)); if (*buf == TYPE_ROM) { *device_type = TYPE_ROM; *block_length = 2048; /* (standard blocksize for yellow-/red-book) */ return 1; } if (*buf == TYPE_WORM) { *device_type = TYPE_WORM; *block_length = 2048; return 1; } if (*buf == TYPE_DISK) { *device_type = TYPE_DISK; if (read_capacity( host_index, ldn)) { *block_length = *(buf+7) + (*(buf+6) << 8) + (*(buf+5) << 16) + (*(buf+4) << 24); return 1; } else return 0; } if (*buf == TYPE_MOD) { *device_type = TYPE_MOD; if (read_capacity( host_index, ldn)) { *block_length = *(buf+7) + (*(buf+6) << 8) + (*(buf+5) << 16) + (*(buf+4) << 24); return 1; } else return 0; } if (*buf == TYPE_TAPE) { *device_type = TYPE_TAPE; *block_length = 0; /* not in use (setting by mt and mtst in op.) */ return 1; } if (*buf == TYPE_PROCESSOR) { *device_type = TYPE_PROCESSOR; *block_length = 0; /* they set their stuff on drivers */ return 1; } if (*buf == TYPE_SCANNER) { *device_type = TYPE_SCANNER; *block_length = 0; /* they set their stuff on drivers */ return 1; } if (*buf == TYPE_MEDIUM_CHANGER) { *device_type = TYPE_MEDIUM_CHANGER; *block_length = 0; /* One never knows, what to expect on a medium changer device. */ return 1; } return 0; } 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 detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n"); } else if (speciale == INTEGRATED_SCSI) { /* if the integrated subsystem has been found automatically: */ len += sprintf (buf+len, "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible"); } else if ((speciale>=0)&& (speciale<(sizeof(subsys_list)/sizeof(struct subsys_list_struct)))) { /* if the subsystem is a slot adapter */ len += sprintf (buf+len, "Adapter category: slot-card\n" "ROM Segment Address: "); if ((pos[2] & 0xf0) == 0xf0) len += sprintf (buf+len, "off\n"); else len += sprintf (buf+len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000); len += sprintf (buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled"); len += sprintf (buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2)); } else { len += sprintf (buf + len, "Adapter category: unknown\n"); } /* common subsystem information to write to the slotn file */ len += sprintf (buf + len, "Subsystem PUN: %d\n", shpnt->this_id); len += sprintf (buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int)(shpnt->io_port), (unsigned int)(shpnt->io_port+7)); len += sprintf (buf + len, "MCA-slot size: %d bits",connectore); /* Now make sure, the bufferlength is devidable by 4 to avoid * paging problems of the buffer. */ while ( len % sizeof( int ) != ( sizeof ( int ) - 1 ) ) len += sprintf (buf+len, " "); len += sprintf (buf+len, "\n"); 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 %s\n",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-bus\n" " or the MCA-Kernel-support is not enabled!\n"); return 0; } #ifdef MODULE /* If the driver is run as module, read from conf.modules or cmd-line */ if (boot_options) option_setup(boot_options); #endif /* get interrupt request level */ if (request_irq (IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) { printk("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=%s\n", 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=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled."); /* register the hostadapter */ if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) { for (k=2;k<8;k++) ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = pos[k]; ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = i; mca_set_adapter_name (slot, subsys_list[i].description); mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo, shpnt); mca_mark_as_used(slot); if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0)) devices_on_irq_11++; else devices_on_irq_14++; } slot++; /* advance to next slot */ } /* advance to next adapter id in the list of IBM-SCSI-subsystems*/ } /* now check for SCSI-adapters, mapped to the integrated SCSI * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here, * as this is a known effect on some models 95xx. */ list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct); for (i = 0; i < list_size; i++) { /* scan each slot for a fitting adapter id */ slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI); if (slot != MCA_NOTFOUND) { /* scan through all slots */ for (j=0;j<8;j++) /* read the pos-information */ pos[j] = mca_read_stored_pos(slot, j); if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */ /* (explanations see above) */ port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); } else { /* anyway, set the portnumber and warn */ port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); printk("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=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled."); /* register the hostadapter */ if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) { for (k=2;k<7;k++) ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos[k] = pos[k]; ((struct ibmmca_hostdata *)shpnt->hostdata)->_special = i; mca_set_adapter_name (slot, subsys_list[i].description); mca_set_adapter_procfn (slot, (MCA_ProcFn) ibmmca_getinfo, shpnt); mca_mark_as_used(slot); if ((i==IBM_SCSI2_FW)&&(pos[4] & 0x01)&&(pos[6]==0)) devices_on_irq_11++; else devices_on_irq_14++; } slot++; /* advance to next slot */ } /* advance to next adapter id in the list of IBM-SCSI-subsystems*/ } if ( IRQ11_registered && !devices_on_irq_11 ) free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */ if ( IRQ14_registered && !devices_on_irq_14 ) free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */ if ( !devices_on_irq_11 && !devices_on_irq_14 ) printk("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: %x\n", ctrl,inb(IM_STAT_REG(found))); printk("IBM MCA SCSI: This adapters' POS-registers: "); for (i=0;i<8;i++) printk("%x ",pos[i]); printk("\n"); #endif reset_status(found) = IM_RESET_NOT_IN_PROGRESS; for (i = 0; i < 16; i++) /* reset the tables */ for (j = 0; j < 8; j++) get_ldn(found)[i][j] = MAX_LOG_DEV; /* check which logical devices exist */ /* after this line, local interrupting is possible: */ local_checking_phase_flag(found) = 1; check_devices(found,adaptertype); /* call by value, using the global variable hosts*/ local_checking_phase_flag(found) = 0; found++; /* now increase index to be prepared for next found subsystem */ /* an ibm mca subsystem has been detected */ return shpnt; } 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=%d\n", scsi_cmd, ldn); #endif /* for specific device-type debugging: */ #ifdef IM_DEBUG_CMD_SPEC_DEV if (ld(host_index)[ldn].device_type==IM_DEBUG_CMD_DEVICE) printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn); #endif /* for possible panics store current command */ last_scsi_command(host_index)[ldn] = scsi_cmd; last_scsi_type(host_index)[ldn] = IM_SCB; /* update statistical info */ IBM_DS(host_index).total_accesses++; IBM_DS(host_index).ldn_access[ldn]++; switch (scsi_cmd) { case READ_6: case WRITE_6: case READ_10: case WRITE_10: case READ_12: case WRITE_12: /* Distinguish between disk and other devices. Only disks (that are the most frequently accessed devices) should be supported by the IBM-SCSI-Subsystem commands. */ switch (ld(host_index)[ldn].device_type) { case TYPE_DISK: /* for harddisks enter here ... */ case TYPE_MOD: /* ... try it also for MO-drives (send flames as */ /* you like, if this won't work.) */ if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) { /* read command preparations */ scb->enable |= IM_READ_CONTROL; IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */ scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT; } else { /* write command preparations */ IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat.*/ scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT; } if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) { scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16); scb->u2.blk.count = (unsigned) cmd->cmnd[4]; } else { scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24); scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8); } last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr; last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count; scb->u2.blk.length = ld(host_index)[ldn].block_length; break; /* for other devices, enter here. Other types are not known by Linux! TYPE_NO_LUN is forbidden as valid device. */ case TYPE_ROM: case TYPE_TAPE: case TYPE_PROCESSOR: case TYPE_WORM: case TYPE_SCANNER: case TYPE_MEDIUM_CHANGER: /* If there is a sequential-device, IBM recommends to use IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE. This includes CD-ROM devices, too, due to the partial sequential read capabilities. */ scb->command = IM_OTHER_SCSI_CMD_CMD; if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) /* enable READ */ scb->enable |= IM_READ_CONTROL; scb->enable |= IM_BYPASS_BUFFER; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); last_scsi_type(host_index)[ldn] = IM_LONG_SCB; /* Read/write on this non-disk devices is also displayworthy, so flash-up the LED/display. */ break; } break; case INQUIRY: IBM_DS(host_index).ldn_inquiry_access[ldn]++; scb->command = IM_DEVICE_INQUIRY_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; scb->u1.log_blk_adr = 0; break; case TEST_UNIT_READY: scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; scb->u1.log_blk_adr = 0; scb->u1.scsi_cmd_length = 6; memcpy (scb->u2.scsi_command, cmd->cmnd, 6); last_scsi_type(host_index)[ldn] = IM_LONG_SCB; break; case READ_CAPACITY: /* the length of system memory buffer must be exactly 8 bytes */ scb->command = IM_READ_CAPACITY_CMD; scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER; if (scb->sys_buf_length > 8) scb->sys_buf_length = 8; break; /* Commands that need read-only-mode (system <- device): */ case REQUEST_SENSE: scb->command = IM_REQUEST_SENSE_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; break; /* Commands that need write-only-mode (system -> device): */ case MODE_SELECT: case MODE_SELECT_10: IBM_DS(host_index).ldn_modeselect_access[ldn]++; scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled*/ scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); last_scsi_type(host_index)[ldn] = IM_LONG_SCB; break; /* For other commands, read-only is useful. Most other commands are running without an input-data-block. */ default: scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); last_scsi_type(host_index)[ldn] = IM_LONG_SCB; break; } /*issue scb command, and return */ if (++disk_rw_in_progress == 1) PS2_DISK_LED_ON (shpnt->host_no, target); if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) { issue_cmd (host_index, 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 %d\n", hostno); return len; } max_pun = subsystem_maxid(host_index); len += sprintf(buffer+len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION); len += sprintf(buffer+len, " SCSI Access-Statistics:\n"); len += sprintf(buffer+len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard"); #ifdef CONFIG_SCSI_MULTI_LUN len += sprintf(buffer+len, " Multiple LUN probing.....: Yes\n"); #else len += sprintf(buffer+len, " Multiple LUN probing.....: No\n"); #endif len += sprintf(buffer+len, " This Hostnumber..........: %d\n", hostno); len += sprintf(buffer+len, " Base I/O-Port............: 0x%x\n", (unsigned int)(IM_CMD_REG(host_index))); len += sprintf(buffer+len, " (Shared) IRQ.............: %d\n", IM_IRQ); len += sprintf(buffer+len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts); len += sprintf(buffer+len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses); len += sprintf(buffer+len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs); len += sprintf(buffer+len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs); len += sprintf(buffer+len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index)); len += sprintf(buffer+len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index)); len += sprintf(buffer+len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index)); len += sprintf(buffer+len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index) - ldn_access_total_modeselect(host_index) - ldn_access_total_inquiry(host_index)); len += sprintf(buffer+len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors); len += sprintf(buffer+len, " Logical-Device-Number (LDN) Access-Statistics:\n"); len += sprintf(buffer+len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n"); len += sprintf(buffer+len, " -----|--------------|-----------|-----------|--------------\n"); for (i=0; i<=MAX_LOG_DEV; i++) len += sprintf(buffer+len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]); len += sprintf(buffer+len, " -----------------------------------------------------------\n\n"); len += sprintf(buffer+len, " Dynamical-LDN-Assignment-Statistics:\n"); len += sprintf(buffer+len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices); len += sprintf(buffer+len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No "); len += sprintf(buffer+len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index)); len += sprintf(buffer+len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments); len += sprintf(buffer+len, "\n Current SCSI-Device-Mapping:\n"); len += sprintf(buffer+len, " Physical SCSI-Device Map Logical SCSI-Device Map\n"); len += sprintf(buffer+len, " ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n"); for (id=0; id<max_pun; id++) { len += sprintf(buffer+len, " %2d ",id); for (lun=0; lun<8; lun++) len += sprintf(buffer+len,"%2s ",ti_p(get_scsi(host_index)[id][lun])); len += sprintf(buffer+len, " %2d ",id); for (lun=0; lun<8; lun++) len += sprintf(buffer+len,"%2s ",ti_l(get_ldn(host_index)[id][lun])); len += sprintf(buffer+len,"\n"); } len += sprintf(buffer+len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n"); len += sprintf(buffer+len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n"); len += sprintf(buffer+len, " - = nothing found, nothing assigned or unprobed LUN)\n\n"); *start = buffer + offset; len -= offset; if (len > length) len = length; 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"