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2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 | /* * Low Level Driver for the IBM Microchannel SCSI Subsystem * * 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 and info. */ /******************* HEADER FILE INCLUDES ************************************/ #ifndef LINUX_VERSION_CODE #include <linux/version.h> #endif /* choose adaption for Kernellevel */ #define local_LinuxVersionCode(v, p, s) (((v)<<16)+((p)<<8)+(s)) #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 "sd.h" #include "scsi.h" #include "hosts.h" #include "ibmmca.h" #include <linux/config.h> /* for CONFIG_SCSI_IBMMCA etc. */ /******************* LOCAL DEFINES *******************************************/ #ifndef mdelay #define mdelay(a) udelay((a) * 1000) #endif /*--------------------------------------------------------------------*/ /* current version of this driver-source: */ #define IBMMCA_SCSI_DRIVER_VERSION "3.1e" /*--------------------------------------------------------------------*/ /* 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_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; }; /*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_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_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 /*--------------------------------------------------------------------*/ /* The model 95 doesn't have a standard activity light. Instead it has a row of LEDs on the front. We use the last one as the activity indicator if we think we're on a model 95. I suspect the model id check will be either too narrow or too general, and some machines won't have an activity indicator. Oh well... 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 /* 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. */ /* use_display is set by the ibmmcascsi=display command line arg */ static int use_display = 0; /* use_adisplay is set by ibmmcascsi=adisplay, which offers a higher * level of displayed luxus on PS/2 95 (really fancy! :-))) */ static int use_adisplay = 0; #define PS2_DISK_LED_ON(ad,id) {\ if( use_display ) { outb((char)(id+48), MOD95_LED_PORT ); \ outb((char)(ad+48), MOD95_LED_PORT+1); } \ else if( use_adisplay ) { if (id<7) outb((char)(id+48), \ MOD95_LED_PORT+1+id); outb((char)(ad+48), MOD95_LED_PORT); } \ else outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); \ } /* bug fixed, Dec 15, 1997, where | was replaced by & here */ #define PS2_DISK_LED_OFF() {\ if( use_display ) { outb( ' ', MOD95_LED_PORT ); \ outb(' ', MOD95_LED_PORT+1); } \ if ( use_adisplay ) { outb(' ',MOD95_LED_PORT ); \ outb(' ',MOD95_LED_PORT+1); outb(' ',MOD95_LED_PORT+2); \ outb(' ',MOD95_LED_PORT+3); outb(' ',MOD95_LED_PORT+4); \ outb(' ',MOD95_LED_PORT+5); outb(' ',MOD95_LED_PORT+6); \ outb(' ',MOD95_LED_PORT+7); } \ else outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); \ } /*--------------------------------------------------------------------*/ /*list of supported subsystems */ struct subsys_list_struct { unsigned short mca_id; char *description; }; /* List of possible IBM-SCSI-adapters */ struct subsys_list_struct subsys_list[] = { {0x8efc, "IBM Fast SCSI-2 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 */ }; /*for /proc filesystem */ struct proc_dir_entry proc_scsi_ibmmca = { PROC_SCSI_IBMMCA, 6, "ibmmca", S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; /* 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 */ }; /* 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 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[8][8]; /*array that contains the information about the physical SCSI-devices attached to this host adapter: */ unsigned char _get_scsi[8][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]; /* 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 and pos3 */ unsigned _pos2, _pos3; /* assign a special variable, that contains dedicated info about the adaptertype */ int _special; }; /* macros to access host data structure */ #define subsystem_pun(hi) (hosts[(hi)]->this_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 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 pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos2) #define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos3) /* 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 /* special flags for hostdata structure */ #define FORCED_DETECTION 100 #define INTEGRATED_SCSI 101 /* 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 }; /*counter of concurrent disk read/writes, to turn on/off disk led */ static int disk_rw_in_progress = 0; /* spinlock handling to avoid command clash while in operation */ spinlock_t info_lock = SPIN_LOCK_UNLOCKED; spinlock_t proc_lock = SPIN_LOCK_UNLOCKED; spinlock_t abort_lock = SPIN_LOCK_UNLOCKED; spinlock_t reset_lock = SPIN_LOCK_UNLOCKED; spinlock_t issue_lock = SPIN_LOCK_UNLOCKED; spinlock_t intr_lock = SPIN_LOCK_UNLOCKED; /* host information */ static int found = 0; static struct Scsi_Host *hosts[IM_MAX_HOSTS+1] = { NULL }; static unsigned int pos[8]; /* whole pos register-line */ /* 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 /*-----------------------------------------------------------------------*/ /******************* FUNCTIONS IN FORWARD DECLARATION ************************/ static void interrupt_handler (int, void *, struct pt_regs *); static void do_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); static int immediate_assign(int, unsigned int, unsigned 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 char *ti_p(int); static char *ti_l(int); static int device_exists (int, int, int *, int *); static struct Scsi_Host *ibmmca_register(Scsi_Host_Template *, int, int, char *); /* local functions needed for proc_info */ static int ldn_access_load(int, int); static int ldn_access_total_read_write(int); static int bypass_controller = 0; /* bypass integrated SCSI-cmd set flag */ /*--------------------------------------------------------------------*/ /******************* LOCAL FUNCTIONS IMPLEMENTATION *************************/ /* newer Kernels need the spinlock interrupt handler */ static void do_interrupt_handler (int irq, void *dev_id, struct pt_regs *regs) { unsigned long flags; spin_lock_irqsave(&io_request_lock, flags); interrupt_handler(irq, dev_id, regs); spin_unlock_irqrestore(&io_request_lock, flags); return; } static void interrupt_handler (int irq, void *dev_id, struct pt_regs *regs) { int host_index; unsigned int intr_reg; unsigned int cmd_result; unsigned int ldn; static unsigned long flags; Scsi_Cmnd *cmd; int errorflag; int interror; host_index=0; /* make sure, host_index is 0, else this won't work and never dare to ask, what happens, if an interrupt-handler does not work :-((( .... */ /* search for one adapter-response on shared interrupt */ while (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]) 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; return; } /*get command result and logical device */ intr_reg = inb (IM_INTR_REG(host_index)); cmd_result = intr_reg & 0xf0; ldn = intr_reg & 0x0f; /*must wait for attention reg not busy, then send EOI to subsystem */ while (1) { spin_lock_irqsave(&intr_lock, flags); if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY)) break; spin_unlock_irqrestore(&intr_lock, flags); } outb (IM_EOI | ldn, IM_ATTN_REG(host_index)); /* get the last_scsi_command here */ interror = last_scsi_command(host_index)[ldn]; spin_unlock_irqrestore(&intr_lock, flags); errorflag = 0; /* no errors by default */ /*these should never happen (hw fails, or a local programming bug) */ if (cmd_result == IM_ADAPTER_HW_FAILURE) { printk("\n"); printk("IBM MCA SCSI: ERROR - subsystem hardware failure!\n"); printk(" Last SCSI-command=0x%X, ldn=%d, host=%d.\n", last_scsi_command(host_index)[ldn],ldn,host_index); errorflag = 1; } if (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) { printk("\n"); printk("IBM MCA SCSI: ERROR - software sequencing error!\n"); printk(" Last SCSI-command=0x%X, ldn=%d, host=%d.\n", last_scsi_command(host_index)[ldn],ldn,host_index); errorflag = 1; } if (cmd_result == IM_CMD_ERROR) { printk("\n"); printk("IBM MCA SCSI: ERROR - command error!\n"); printk(" Last SCSI-command=0x%X, ldn=%d, host=%d.\n", last_scsi_command(host_index)[ldn],ldn,host_index); errorflag = 1; } if (errorflag) { /* 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(host_index)[ldn]); printk(" Attention Register..........: %x\n", inb (IM_ATTN_REG(host_index))); printk(" Basic Control Register......: %x\n", inb (IM_CTR_REG(host_index))); printk(" Interrupt Status Register...: %x\n", intr_reg); printk(" Basic Status Register.......: %x\n", inb (IM_STAT_REG(host_index))); if ((last_scsi_type(host_index)[ldn]==IM_SCB)|| (last_scsi_type(host_index)[ldn]==IM_LONG_SCB)) { printk(" SCB End Status Word.........: %x\n", ld(host_index)[ldn].tsb.end_status); printk(" Command Status..............: %x\n", ld(host_index)[ldn].tsb.cmd_status); printk(" Device Status...............: %x\n", ld(host_index)[ldn].tsb.dev_status); printk(" Command Error...............: %x\n", ld(host_index)[ldn].tsb.cmd_error); printk(" Device Error................: %x\n", ld(host_index)[ldn].tsb.dev_error); printk(" Last SCB Address (LSW)......: %x\n", ld(host_index)[ldn].tsb.low_of_last_scb_adr); printk(" Last SCB Address (MSW)......: %x\n", ld(host_index)[ldn].tsb.high_of_last_scb_adr); } printk(" Send report to the maintainer.\n"); panic("IBM MCA SCSI: Fatal errormessage from the subsystem!\n"); } /* if no panic appeared, increase the interrupt-counter */ IBM_DS(host_index).total_interrupts++; /*only for local checking phase */ if (local_checking_phase_flag(host_index)) { stat_result(host_index) = cmd_result; got_interrupt(host_index) = 1; reset_status(host_index) = IM_RESET_FINISHED_OK; last_scsi_command(host_index)[ldn] = NO_SCSI; return; } /*handling of commands coming from upper level of scsi driver */ else { if (last_scsi_type(host_index)[ldn] == IM_IMM_CMD) { /*verify ldn, and may handle rare reset immediate command */ if ((reset_status(host_index) == IM_RESET_IN_PROGRESS)&& (last_scsi_command(host_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(host_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(host_index) = IM_RESET_FINISHED_OK; } stat_result(host_index) = cmd_result; last_scsi_command(host_index)[ldn] = NO_SCSI; return; } else if (last_scsi_command(host_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(host_index)[ldn].cmd; if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) cmd->result = DID_NO_CONNECT << 16; else cmd->result = DID_ABORT << 16; stat_result(host_index) = cmd_result; last_scsi_command(host_index)[ldn] = NO_SCSI; 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(host_index) = IM_RESET_FINISHED_OK; stat_result(host_index) = cmd_result; last_scsi_command(host_index)[ldn] = NO_SCSI; return; } } last_scsi_command(host_index)[ldn] = NO_SCSI; cmd = ld(host_index)[ldn].cmd; #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; ld(host_index)[ldn].cmd = NULL; #ifdef IM_DEBUG_INT printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(host_index)[ldn].tsb.dev_status, ld(host_index)[ldn].tsb.cmd_status, ld(host_index)[ldn].tsb.dev_error, ld(host_index)[ldn].tsb.cmd_error); #endif /*if this is end of media read/write, may turn off PS/2 disk led */ if ((ld(host_index)[ldn].device_type!=TYPE_NO_LUN)&& (ld(host_index)[ldn].device_type!=TYPE_NO_DEVICE)) { /* only access this, if there was a valid device addressed */ switch (cmd->cmnd[0]) { case READ_6: case WRITE_6: case READ_10: case WRITE_10: case READ_12: case WRITE_12: 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-defintion, I suppose, it is a printing error in the * technical reference and assume as mask 0x3e. (ML) */ cmd->result = (ld(host_index)[ldn].tsb.dev_status & 0x3e); /* write device status into cmd->result, and call done function */ if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) IBM_DS(host_index).total_errors++; if (interror == NO_SCSI) /* unexpected interrupt :-( */ cmd->result |= DID_BAD_INTR << 16; else cmd->result |= DID_OK << 16; (cmd->scsi_done) (cmd); } if (interror == NO_SCSI) printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n"); return; } /*--------------------------------------------------------------------*/ static void issue_cmd (int host_index, unsigned long cmd_reg, unsigned char attn_reg) { static unsigned long flags; /* must wait for attention reg not busy */ while (1) { spin_lock_irqsave(&issue_lock, flags); if (!(inb (IM_STAT_REG(host_index)) & IM_BUSY)) break; spin_unlock_irqrestore(&issue_lock, flags); } /*write registers and enable system interrupts */ outl (cmd_reg, IM_CMD_REG(host_index)); outb (attn_reg, IM_ATTN_REG(host_index)); spin_unlock_irqrestore(&issue_lock, flags); } /*--------------------------------------------------------------------*/ static void internal_done (Scsi_Cmnd * cmd) { cmd->SCp.Status++; } /*--------------------------------------------------------------------*/ /* SCSI-SCB-command for device_inquiry */ static int device_inquiry(int host_index, int ldn) { int retries; Scsi_Cmnd cmd; 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 stusblock */ if (bypass_controller) { /* fill the commonly known field for device-inquiry SCSI cmnd */ cmd.cmd_len = 6; memset (&(cmd.cmnd), 0x0, sizeof(char) * cmd.cmd_len); cmd.cmnd[0] = INQUIRY; /* device inquiry */ cmd.cmnd[4] = 0xff; /* return buffer size = 255 */ } for (retries = 0; retries < 3; retries++) { if (bypass_controller) { /* bypass the hardware integrated command set */ scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT; scb->u1.scsi_cmd_length = cmd.cmd_len; memcpy (scb->u2.scsi_command, &(cmd.cmnd), cmd.cmd_len); last_scsi_command(host_index)[ldn] = INQUIRY; last_scsi_type(host_index)[ldn] = IM_SCB; } else { /*fill scb with inquiry command */ scb->command = IM_DEVICE_INQUIRY_CMD; scb->enable = IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT; 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 = 0xff; /* 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 (retries >= 3) return 0; else return 1; } static int read_capacity(int host_index, int ldn) { int retries; Scsi_Cmnd cmd; 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; if (bypass_controller) { /* read capacity in commonly known default SCSI-format */ cmd.cmd_len = 10; memset (&(cmd.cmnd), 0x0, sizeof(char) * cmd.cmd_len); cmd.cmnd[0] = READ_CAPACITY; /* read capacity */ } for (retries = 0; retries < 3; retries++) { /*fill scb with read capacity command */ if (bypass_controller) { /* bypass the SCSI-command */ scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL; scb->u1.scsi_cmd_length = cmd.cmd_len; memcpy (scb->u2.scsi_command, &(cmd.cmnd), cmd.cmd_len); last_scsi_command(host_index)[ldn] = READ_CAPACITY; last_scsi_type(host_index)[ldn] = IM_SCB; } else { scb->command = IM_READ_CAPACITY_CMD; scb->enable = IM_READ_CONTROL; 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 (retries >= 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 retries; unsigned long imm_command; for (retries=0; retries<3; retries ++) { imm_command = inl(IM_CMD_REG(host_index)); imm_command &= (unsigned long)(0xF8000000); /* keep reserved bits */ imm_command |= (unsigned long)(IM_ASSIGN_IMM_CMD); imm_command |= (unsigned long)((lun & 7) << 24); imm_command |= (unsigned long)((operation & 1) << 23); imm_command |= (unsigned long)((pun & 7) << 20); imm_command |= (unsigned long)((ldn & 15) << 16); last_scsi_command(host_index)[0xf] = IM_ASSIGN_IMM_CMD; last_scsi_type(host_index)[0xf] = IM_IMM_CMD; got_interrupt(host_index) = 0; issue_cmd (host_index, (unsigned long)(imm_command), IM_IMM_CMD | 0xf); while (!got_interrupt(host_index)) barrier (); /*if command succesful, break */ if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED) { return 1; } } if (retries >= 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) { mdelay(1+999/HZ); barrier(); } /* if reset did not complete, just claim */ 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 value) { switch (value) { case TYPE_IBM_SCSI_ADAPTER: return("A"); break; case TYPE_DISK: return("D"); break; case TYPE_TAPE: return("T"); break; case TYPE_PROCESSOR: return("P"); break; case TYPE_WORM: return("W"); break; case TYPE_ROM: return("R"); break; case TYPE_SCANNER: return("S"); break; case TYPE_MOD: return("M"); break; case TYPE_MEDIUM_CHANGER: return("C"); break; case TYPE_NO_LUN: return("+"); break; /* show NO_LUN */ case TYPE_NO_DEVICE: default: return("-"); break; } return("-"); } /* interpreter for logical device numbers (ldn) */ static char *ti_l(int value) { const char hex[16] = "0123456789abcdef"; static char answer[2]; answer[1] = (char)(0x0); if (value<=MAX_LOG_DEV) answer[0] = hex[value]; else answer[0] = '-'; return (char *)&answer; } /* The following routine probes the SCSI-devices in four steps: 1. The current ldn -> pun,lun mapping is removed on the SCSI-adapter. 2. ldn 0 is used to go through all possible combinations of pun,lun and a device_inquiry is done to fiddle out whether there is a device responding or not. This physical map is stored in get_scsi[][]. 3. The 15 available ldns (0-14) are mapped to existing pun,lun. If there are more devices than ldns, it stops at 14 for the boot time. Dynamical remapping will be done in ibmmca_queuecommand. 4. If there are less than 15 valid pun,lun, the remaining ldns are mapped to NON-existing pun,lun to satisfy the adapter. Information about pun,lun -> ldn is stored as before in get_ldn[][]. This method leads to the result, that the SCSI-pun,lun shown to Linux mid-level- and higher-level-drivers is exactly corresponding to the physical reality on the SCSI-bus. Therefore, it is possible that users of older releases of this driver have to rewrite their fstab-file, because the /dev/sdXXX could have changed due to the right pun,lun report, now. The assignment of ALL ldns avoids dynamical remapping by the adapter itself. */ static void check_devices (int host_index) { int id, lun, ldn, ticks; int count_devices; /* local counter for connected device */ /* 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'*/ 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; } /* initialize the very important driver-informational arrays/structs */ memset (ld(host_index), 0, sizeof(ld(host_index))); 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. */ } /* STEP 1: */ #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Current SCSI-host index: %d\n",host_index); #endif printk("IBM MCA SCSI: Removing default logical SCSI-device mapping."); for (ldn=0; ldn<MAX_LOG_DEV; ldn++) { #ifdef IM_DEBUG_PROBE printk("."); #endif immediate_assign(host_index,0,0,ldn,REMOVE_LDN); /* remove ldn (wherever)*/ } lun = 0; /* default lun is 0 */ /* STEP 2: */ printk("\nIBM MCA SCSI: Probing SCSI-devices."); for (id=0; id<8; id++) #ifdef CONFIG_SCSI_MULTI_LUN for (lun=0; lun<8; lun++) #endif { #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); } } /* STEP 3: */ printk("\nIBM MCA SCSI: Mapping SCSI-devices."); ldn = 0; lun = 0; #ifdef CONFIG_SCSI_MULTI_LUN for (lun=0; lun<8 && ldn<MAX_LOG_DEV; lun++) #endif for (id=0; id<8 && ldn<MAX_LOG_DEV; id++) { #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<8 && ldn<MAX_LOG_DEV; id++) { if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) { /* 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++; } } printk("\n"); 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"); #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<8; 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).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)); 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 device is CD_ROM, assume block size 2048 and return */ if (*buf == TYPE_ROM) { *device_type = TYPE_ROM; *block_length = 2048; /* (standard blocksize for yellow-/red-book) */ return 1; } if (*buf == TYPE_WORM) /* CD-burner, WORM, Linux handles this as CD-ROM therefore, the block_length is also 2048. */ { *device_type = TYPE_WORM; *block_length = 2048; return 1; } /* if device is disk, use "read capacity" to find its block size */ 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 this is a magneto-optical drive, treat it like a harddisk */ 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) /* TAPE-device found */ { *device_type = TYPE_TAPE; *block_length = 0; /* not in use (setting by mt and mtst in op.) */ return 1; } if (*buf == TYPE_PROCESSOR) /* HP-Scanners, diverse SCSI-processing units*/ { *device_type = TYPE_PROCESSOR; *block_length = 0; /* they set their stuff on drivers */ return 1; } if (*buf == TYPE_SCANNER) /* other SCSI-scanners */ { *device_type = TYPE_SCANNER; *block_length = 0; /* they set their stuff on drivers */ return 1; } if (*buf == TYPE_MEDIUM_CHANGER) /* Medium-Changer */ { *device_type = TYPE_MEDIUM_CHANGER; *block_length = 0; /* One never knows, what to expect on a medium changer device. */ return 1; } /* Up to now, no SCSI-devices that are known up to kernel 2.1.31 are ignored! MO-drives are now supported and treated as harddisk. */ return 0; } /*--------------------------------------------------------------------*/ #ifdef CONFIG_SCSI_IBMMCA void 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,"display")) { use_display = 1; } if (!strcmp(token,"adisplay")) { use_adisplay = 1; } if (!strcmp(token,"bypass")) { bypass_controller = 1; } if (!strcmp(token,"normal")) { ibm_ansi_order = 0; } if (!strcmp(token,"ansi")) { ibm_ansi_order = 1; } 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; } #endif /*--------------------------------------------------------------------*/ static int ibmmca_getinfo (char *buf, int slot, void *dev) { struct Scsi_Host *shpnt; int len, special; unsigned int pos2, pos3; static unsigned long flags; spin_lock_irqsave(&info_lock, flags); shpnt = dev; /* assign host-structure to local pointer */ len = 0; /* set filled text-buffer index to 0 */ /* get the _special contents of the hostdata structure */ special = ((struct ibmmca_hostdata *)shpnt->hostdata)->_special; pos2 = ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos2; pos3 = ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos3; if (special == FORCED_DETECTION) /* forced detection */ { len += sprintf (buf + len, "Adapter cathegory: forced detected\n"); len += sprintf(buf + len, "***************************************\n"); len += sprintf(buf + len, "*** Forced detected SCSI Adapter ***\n"); len += sprintf(buf + len, "*** No chip-information available ***\n"); len += sprintf(buf + len, "***************************************\n"); } else if (special == INTEGRATED_SCSI) { /* if the integrated subsystem has been found automatically: */ len += sprintf (buf + len, "Adapter cathegory: integrated\n"); len += sprintf (buf + len, "Chip revision level: %d\n", ((pos2 & 0xf0) >> 4)); len += sprintf (buf + len, "Chip status: %s\n", (pos2 & 1) ? "enabled" : "disabled"); len += sprintf (buf + len, "8 kByte NVRAM status: %s\n", (pos2 & 2) ? "locked" : "accessible"); } else if ((special>=0)&& (special<(sizeof(subsys_list)/sizeof(struct subsys_list_struct)))) { /* if the subsystem is a slot adapter */ len += sprintf (buf + len, "Adapter cathegory: slot-card\n"); len += sprintf (buf + len, "Chip revision level: %d\n", ((pos2 & 0xf0) >> 4)); len += sprintf (buf + len, "Chip status: %s\n", (pos2 & 1) ? "enabled" : "disabled"); len += sprintf (buf + len, "Port offset: 0x%x\n", ((pos2 & 0x0e) << 2)); } else { len += sprintf (buf + len, "Adapter cathegory: 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", (unsigned int)(shpnt->io_port), (unsigned int)(shpnt->io_port+7)); /* Now make sure, the bufferlength is devideable by 4 to avoid * paging problems of the buffer. */ while ( len % sizeof( int ) != ( sizeof ( int ) - 1 ) ) { len += sprintf (buf + len, " "); } len += sprintf (buf + len, "\n"); spin_unlock_irqrestore(&info_lock, flags); return len; } int ibmmca_detect (Scsi_Host_Template * scsi_template) { struct Scsi_Host *shpnt; int port, id, i, j, list_size, slot; found = 0; /* make absolutely sure, that found is set to 0 */ /* if this is not MCA machine, return "nothing found" */ if (!MCA_bus) { printk("IBM MCA SCSI: No Microchannel-bus support present -> Aborting.\n"); return 0; } else printk("IBM MCA SCSI: Version %s\n",IBMMCA_SCSI_DRIVER_VERSION); /* get interrupt request level */ if (request_irq (IM_IRQ, do_interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) { printk("IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ); return 0; } /* 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 detected SCSI Adapter"))) { ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos2 = 0; ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos3 = 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); } } 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 */ if (( pos[2] != 0xff) || (pos[3] != 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 incomming 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"); printk(" 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", port, id); printk(" chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled."); /* register the found integrated SCSI-subsystem */ if ((shpnt = ibmmca_register(scsi_template, port, id, "IBM Integrated SCSI Controller"))) { ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos2 = pos[2]; ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos3 = pos[3]; ((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); } } /* 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"); printk(" SCSI-operations may not work.\n"); } id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */ printk("IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id); printk(" chip rev.=%d, port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled."); /* register the hostadapter */ if ((shpnt = ibmmca_register(scsi_template, port, id, subsys_list[i].description))) { ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos2 = pos[2]; ((struct ibmmca_hostdata *)shpnt->hostdata)->_pos3 = pos[3]; ((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); } slot++; /* advance to next slot */ } /* advance to next adapter id in the list of IBM-SCSI-subsystems*/ } if (!found) { /* maybe ESDI, or other producers' SCSI-hosts */ free_irq (IM_IRQ, hosts); 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, 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 */ 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; /* 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"); if (bypass_controller) printk("IBM MCA SCSI: Subsystem SCSI-commands get bypassed.\n"); #endif reset_status(found) = IM_RESET_NOT_IN_PROGRESS; for (i = 0; i < 8; i++) /* reset the tables */ for (j = 0; j < 8; j++) get_ldn(found)[i][j] = MAX_LOG_DEV; /* check which logical devices exist */ local_checking_phase_flag(found) = 1; check_devices(found); /* 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. The old edition is now improved by dynamical reassignment of ldn numbers that are currently not assigned. The mechanism works in a way, that first the physical structure is checked. If at a certain pun,lun a device should be present, the routine proceeds to the ldn check from get_ldn. An answer of 0xff would show-up, that the aimed device is currently not assigned any ldn. At this point, the dynamical remapping algorithm is called. It works in a way, that it goes in cyclic order through the ldns from 7 to 14. If a ldn is assigned, it takes 8 dynamical reassignment calls, until a device looses its ldn again. With this method it is assured, that while doing intense I/O between up to eight devices, no dynamical remapping is done there. ldns 0 through 6(!) are left untouched, which means, that puns 0 through 7(!) on lun=0 are always accessible without remapping. These ldns are statically assigned by this driver. The subsystem always occupies at least one pun, therefore 7 ldns (at lun=0) for other devices are sufficient. (The adapter uses always ldn=15, at whatever pun it is.) */ 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; if (ibm_ansi_order) target = 6 - cmd->target; else target = cmd->target; 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; done (cmd); return 0; } /*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; 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"); printk(" On ldn 7-14 SCSI-commands everywhere in progress.\n"); printk(" Reporting DID_NO_CONNECT for device (%d,%d).\n", target, cmd->lun); cmd->result = DID_NO_CONNECT << 16;/* return no connect*/ done (cmd); return 0; } } /* unmap non-processing ldn */ for (id=0; id<8; 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; /* unmap entry */ } } /* set reduced interrupt_handler-mode for checking */ local_checking_phase_flag(host_index) = 1; /* unassign found ldn (pun,lun does not matter for remove) */ immediate_assign(host_index,0,0,next_ldn(host_index),REMOVE_LDN); /* assign found ldn to aimed pun,lun */ immediate_assign(host_index,target,cmd->lun,next_ldn(host_index),SET_LDN); /* 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); /* 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 = 0; /* To prevent panic set 0, because devices that were not assigned, should have nothing in progress. */ /* 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); /* set back to normal interrupt_handling */ local_checking_phase_flag(host_index) = 0; /* Information on syslog terminal */ printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->lun); /* 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; 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; scb->tsb_adr = virt_to_bus(&(ld(host_index)[ldn].tsb)); if (cmd->use_sg) { int i = cmd->use_sg; struct scatterlist *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); scb->sys_buf_length = cmd->request_bufflen; } /*fill scb information dependent on scsi command */ scsi_cmd = cmd->cmnd[0]; #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: /* statistics for proc_info */ if ((scsi_cmd == READ_6)||(scsi_cmd == READ_10)||(scsi_cmd == READ_12)) IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */ else if ((scsi_cmd == WRITE_6)||(scsi_cmd == WRITE_10)|| (scsi_cmd == WRITE_12)) IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat.*/ /* 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 */ if (bypass_controller) { scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy(scb->u2.scsi_command,cmd->cmnd,cmd->cmd_len); } else { scb->command = IM_READ_DATA_CMD; scb->enable |= IM_READ_CONTROL; } } else { /* write command preparations */ if (bypass_controller) { scb->command = IM_OTHER_SCSI_CMD_CMD; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy(scb->u2.scsi_command,cmd->cmnd,cmd->cmd_len); } else { scb->command = IM_WRITE_DATA_CMD; } } if (!bypass_controller) { 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); } scb->u2.blk.length = ld(host_index)[ldn].block_length; } if (++disk_rw_in_progress == 1) PS2_DISK_LED_ON (shpnt->host_no, target); 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. Good/modern CD-ROM-drives are capable of reading sequential AND random-access. This leads to the problem, that random-accesses are covered by the subsystem, but sequentials are not, as like for tape-drives. Therefore, it is the easiest way to use IM_OTHER_SCSI_CMD_CMD for all read-ops on CD-ROM-drives in order not to run into timing problems and to have a stable state. In addition, data-access on CD-ROMs works faster like that. Strange, but obvious. */ 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->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); /* Read/write on this non-disk devices is also displayworthy, so flash-up the LED/display. */ if (++disk_rw_in_progress == 1) PS2_DISK_LED_ON (shpnt->host_no, target); break; } break; case INQUIRY: IBM_DS(host_index).ldn_inquiry_access[ldn]++; if (bypass_controller) { scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); } else { scb->command = IM_DEVICE_INQUIRY_CMD; scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT; } break; case READ_CAPACITY: /* the length of system memory buffer must be exactly 8 bytes */ if (scb->sys_buf_length > 8) scb->sys_buf_length = 8; if (bypass_controller) { scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); } else { scb->command = IM_READ_CAPACITY_CMD; scb->enable |= IM_READ_CONTROL; } break; /* Commands that need read-only-mode (system <- device): */ case REQUEST_SENSE: if (bypass_controller) { scb->command = IM_OTHER_SCSI_CMD_CMD; scb->enable |= IM_READ_CONTROL; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); } else { scb->command = IM_REQUEST_SENSE_CMD; scb->enable |= IM_READ_CONTROL; } 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; /*Select needs WRITE-enabled*/ scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); 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; scb->u1.scsi_cmd_length = cmd->cmd_len; memcpy (scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); break; } /*issue scb command, and return */ issue_cmd (host_index, virt_to_bus(scb), IM_SCB | ldn); 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; static unsigned long flags; unsigned long imm_command; /* return SCSI_ABORT_SNOOZE ; */ spin_lock_irqsave(&abort_lock, flags); if (ibm_ansi_order) target = 6 - cmd->target; else target = cmd->target; 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->done) (cmd); return SCSI_ABORT_SNOOZE; } /*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) { spin_unlock_irqrestore(&abort_lock, flags); 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; spin_unlock_irqrestore(&abort_lock, flags); spin_lock_irqsave(&abort_lock, flags); } /*write registers and enable system interrupts */ outl (imm_command, IM_CMD_REG(host_index)); outb (IM_IMM_CMD | ldn, IM_ATTN_REG(host_index)); spin_unlock_irqrestore(&abort_lock, flags); #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Abort submitted, waiting for adapter response...\n"); #endif while (!cmd->SCp.Status) barrier (); cmd->scsi_done = saved_done; /*if abort went well, call saved done, then return success or error */ if (cmd->result == (DID_ABORT << 16)) { cmd->result |= DID_ABORT << 16; if (cmd->scsi_done) (cmd->scsi_done) (cmd); ld(host_index)[ldn].cmd = NULL; #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Abort finished with success.\n"); #endif return SCSI_ABORT_SUCCESS; } else { cmd->result |= DID_NO_CONNECT << 16; if (cmd->scsi_done) (cmd->scsi_done) (cmd); ld(host_index)[ldn].cmd = NULL; #ifdef IM_DEBUG_PROBE printk("IBM MCA SCSI: Abort failed.\n"); #endif return 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; spin_lock_irqsave(&reset_lock, flags); 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 */ if (!local_checking_phase_flag(host_index)) { cmd->result = DID_NO_CONNECT << 16; if (cmd->scsi_done) (cmd->done) (cmd); } return SCSI_ABORT_SNOOZE; } if (local_checking_phase_flag(host_index)) { printk("IBM MCA SCSI: unable to reset while checking devices.\n"); spin_unlock_irqrestore(&reset_lock, flags); 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; spin_unlock_irqrestore(&reset_lock, flags); spin_lock_irqsave(&reset_lock, flags); } /*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)) { mdelay(1+999/HZ); 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; spin_unlock_irqrestore(&reset_lock, flags); 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"); spin_unlock_irqrestore(&reset_lock, flags); return SCSI_RESET_ERROR; } /* so reset finished ok - call outstanding done's, and return success */ printk ("IBM MCA SCSI: Reset completed without known error.\n"); spin_unlock_irqrestore(&reset_lock, flags); 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; (cmd_aid->scsi_done) (cmd_aid); } } 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; spin_lock_irqsave(&proc_lock, flags); for (i = 0; hosts[i] && hosts[i]->host_no != hostno; i++); shpnt = hosts[i]; host_index = i; if (!shpnt) { len += sprintf(buffer+len, "\nCan't find adapter for host number %d\n", hostno); return len; } 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, " SCSI-command set used....: %s\n", (bypass_controller) ? "software" : "hardware integrated"); 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 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 necessaray..: %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<=7; id++) { len += sprintf(buffer+len, " %2d ",id); for (lun=0; lun<8; lun++) len += sprintf(buffer+len,"%2s ",ti_p(get_scsi(host_index)[id][lun])); len += sprintf(buffer+len, " %2d ",id); for (lun=0; lun<8; lun++) len += sprintf(buffer+len,"%2s ",ti_l(get_ldn(host_index)[id][lun])); len += sprintf(buffer+len,"\n"); } len += sprintf(buffer+len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n"); len += sprintf(buffer+len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n"); len += sprintf(buffer+len, " - = nothing found, nothing assigned or unprobed LUN)\n\n"); *start = buffer + offset; len -= offset; if (len > length) len = length; spin_unlock_irqrestore(&proc_lock, flags); return len; } #ifdef MODULE /* Eventually this will go into an include file, but this will be later */ Scsi_Host_Template driver_template = IBMMCA; #include "scsi_module.c" /* * Module parameters */ 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(bypass, "1i"); MODULE_PARM(normal, "1i"); MODULE_PARM(ansi, "1i"); #endif /*--------------------------------------------------------------------*/ |