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| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/ibmmca.c | |
| download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/scsi/ibmmca.c')
| -rw-r--r-- | drivers/scsi/ibmmca.c | 2491 |
1 files changed, 2491 insertions, 0 deletions
diff --git a/drivers/scsi/ibmmca.c b/drivers/scsi/ibmmca.c new file mode 100644 index 000000000000..a3fdead9bce9 --- /dev/null +++ b/drivers/scsi/ibmmca.c @@ -0,0 +1,2491 @@ +/* + Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for + Linux Kernel >= 2.4.0. + Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU + General Public License. Written by Martin Kolinek, December 1995. + Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang + See the file Documentation/scsi/ibmmca.txt for a detailed description + of this driver, the commandline arguments and the history of its + development. + See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest + updates, info and ADF-files for adapters supported by this driver. + + Alan Cox <alan@redhat.com> + Updated for Linux 2.5.45 to use the new error handler, cleaned up the + lock macros and did a few unavoidable locking tweaks, plus one locking + fix in the irq and completion path. + + */ + +#include <linux/config.h> +#ifndef LINUX_VERSION_CODE +#include <linux/version.h> +#endif +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,45) +#error "This driver works only with kernel 2.5.45 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/interrupt.h> +#include <linux/ioport.h> +#include <linux/delay.h> +#include <linux/blkdev.h> +#include <linux/proc_fs.h> +#include <linux/stat.h> +#include <linux/mca.h> +#include <linux/string.h> +#include <linux/spinlock.h> +#include <linux/init.h> +#include <linux/mca-legacy.h> + +#include <asm/system.h> +#include <asm/io.h> + +#include "scsi.h" +#include <scsi/scsi_host.h> +#include "ibmmca.h" + +/* current version of this driver-source: */ +#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac" + +/* driver configuration */ +#define IM_MAX_HOSTS 8 /* maximum number of host adapters */ +#define IM_RESET_DELAY 60 /* seconds allowed for a reset */ + +/* driver debugging - #undef all for normal operation */ +/* if defined: count interrupts and ignore this special one: */ +#undef IM_DEBUG_TIMEOUT //50 +#define TIMEOUT_PUN 0 +#define TIMEOUT_LUN 0 +/* verbose interrupt: */ +#undef IM_DEBUG_INT +/* verbose queuecommand: */ +#undef IM_DEBUG_CMD +/* verbose queucommand for specific SCSI-device type: */ +#undef IM_DEBUG_CMD_SPEC_DEV +/* verbose device probing */ +#undef IM_DEBUG_PROBE + +/* device type that shall be displayed on syslog (only during debugging): */ +#define IM_DEBUG_CMD_DEVICE TYPE_TAPE + +/* relative addresses of hardware registers on a subsystem */ +#define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */ +#define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */ +#define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */ +#define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */ +#define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */ + +/* basic I/O-port of first adapter */ +#define IM_IO_PORT 0x3540 +/* maximum number of hosts that can be found */ +#define IM_N_IO_PORT 8 + +/*requests going into the upper nibble of the Attention register */ +/*note: the lower nibble specifies the device(0-14), or subsystem(15) */ +#define IM_IMM_CMD 0x10 /*immediate command */ +#define IM_SCB 0x30 /*Subsystem Control Block command */ +#define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */ +#define IM_EOI 0xe0 /*end-of-interrupt request */ + +/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */ +#define IM_HW_RESET 0x80 /*hardware reset */ +#define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */ +#define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */ + +/*to interpret the upper nibble of Interrupt Status register */ +/*note: the lower nibble specifies the device(0-14), or subsystem(15) */ +#define IM_SCB_CMD_COMPLETED 0x10 +#define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50 +#define IM_LOOP_SCATTER_BUFFER_FULL 0x60 +#define IM_ADAPTER_HW_FAILURE 0x70 +#define IM_IMMEDIATE_CMD_COMPLETED 0xa0 +#define IM_CMD_COMPLETED_WITH_FAILURE 0xc0 +#define IM_CMD_ERROR 0xe0 +#define IM_SOFTWARE_SEQUENCING_ERROR 0xf0 + +/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */ +#define IM_CMD_REG_FULL 0x08 +#define IM_CMD_REG_EMPTY 0x04 +#define IM_INTR_REQUEST 0x02 +#define IM_BUSY 0x01 + +/*immediate commands (word written into low 2 bytes of command reg) */ +#define IM_RESET_IMM_CMD 0x0400 +#define IM_FEATURE_CTR_IMM_CMD 0x040c +#define IM_DMA_PACING_IMM_CMD 0x040d +#define IM_ASSIGN_IMM_CMD 0x040e +#define IM_ABORT_IMM_CMD 0x040f +#define IM_FORMAT_PREP_IMM_CMD 0x0417 + +/*SCB (Subsystem Control Block) structure */ +struct im_scb { + unsigned short command; /*command word (read, etc.) */ + unsigned short enable; /*enable word, modifies cmd */ + union { + unsigned long log_blk_adr; /*block address on SCSI device */ + unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */ + } u1; + unsigned long sys_buf_adr; /*physical system memory adr */ + unsigned long sys_buf_length; /*size of sys mem buffer */ + unsigned long tsb_adr; /*Termination Status Block adr */ + unsigned long scb_chain_adr; /*optional SCB chain address */ + union { + struct { + unsigned short count; /*block count, on SCSI device */ + unsigned short length; /*block length, on SCSI device */ + } blk; + unsigned char scsi_command[12]; /*other scsi command */ + } u2; +}; + +/*structure scatter-gather element (for list of system memory areas) */ +struct im_sge { + void *address; + unsigned long byte_length; +}; + +/*structure returned by a get_pos_info command: */ +struct im_pos_info { + unsigned short pos_id; /* adapter id */ + unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */ + unsigned char pos_2; /* pos 2 */ + unsigned char int_level; /* interrupt level IRQ 11 or 14 */ + unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */ + unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */ + unsigned char num_luns; /* number of supported luns per device */ + unsigned char num_puns; /* number of supported puns */ + unsigned char pacing_factor; /* pacing factor */ + unsigned char num_ldns; /* number of ldns available */ + unsigned char eoi_off; /* time EOI and interrupt inactive */ + unsigned char max_busy; /* time between reset and busy on */ + unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */ + unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */ + unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */ + unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */ + unsigned char pos_6; /* pos 6 */ + unsigned char pos_5; /* pos 5 */ + unsigned short max_overlap; /* maximum overlapping requests */ + unsigned short num_bus; /* number of SCSI-busses */ +}; + +/*values for SCB command word */ +#define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */ +#define IM_NO_DISCONNECT 0x0080 /*flag for any command */ +#define IM_READ_DATA_CMD 0x1c01 +#define IM_WRITE_DATA_CMD 0x1c02 +#define IM_READ_VERIFY_CMD 0x1c03 +#define IM_WRITE_VERIFY_CMD 0x1c04 +#define IM_REQUEST_SENSE_CMD 0x1c08 +#define IM_READ_CAPACITY_CMD 0x1c09 +#define IM_DEVICE_INQUIRY_CMD 0x1c0b +#define IM_READ_LOGICAL_CMD 0x1c2a +#define IM_OTHER_SCSI_CMD_CMD 0x241f + +/* unused, but supported, SCB commands */ +#define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */ +#define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */ +#define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */ +#define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */ +#define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */ + +/*values to set bits in the enable word of SCB */ +#define IM_READ_CONTROL 0x8000 +#define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000 +#define IM_RETRY_ENABLE 0x2000 +#define IM_POINTER_TO_LIST 0x1000 +#define IM_SUPRESS_EXCEPTION_SHORT 0x0400 +#define IM_BYPASS_BUFFER 0x0200 +#define IM_CHAIN_ON_NO_ERROR 0x0001 + +/*TSB (Termination Status Block) structure */ +struct im_tsb { + unsigned short end_status; + unsigned short reserved1; + unsigned long residual_byte_count; + unsigned long sg_list_element_adr; + unsigned short status_length; + unsigned char dev_status; + unsigned char cmd_status; + unsigned char dev_error; + unsigned char cmd_error; + unsigned short reserved2; + unsigned short reserved3; + unsigned short low_of_last_scb_adr; + unsigned short high_of_last_scb_adr; +}; + +/*subsystem uses interrupt request level 14 */ +#define IM_IRQ 14 +/*SCSI-2 F/W may evade to interrupt 11 */ +#define IM_IRQ_FW 11 + +/* Model 95 has an additional alphanumeric display, which can be used + to display SCSI-activities. 8595 models do not have any disk led, which + makes this feature quite useful. + The regular PS/2 disk led is turned on/off by bits 6,7 of system + control port. */ + +/* LED display-port (actually, last LED on display) */ +#define MOD95_LED_PORT 0x108 +/* system-control-register of PS/2s with diskindicator */ +#define PS2_SYS_CTR 0x92 +/* activity displaying methods */ +#define LED_DISP 1 +#define LED_ADISP 2 +#define LED_ACTIVITY 4 +/* failed intr */ +#define CMD_FAIL 255 + +/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED + displays. ldn is no longer displayed here, because the ldn mapping is now + done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime + or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble, + interest, debugging or just for having fun. The left number gives the + host-adapter number and the right shows the accessed SCSI-ID. */ + +/* display_mode is set by the ibmmcascsi= command line arg */ +static int display_mode = 0; +/* set default adapter timeout */ +static unsigned int adapter_timeout = 45; +/* for probing on feature-command: */ +static unsigned int global_command_error_excuse = 0; +/* global setting by command line for adapter_speed */ +static int global_adapter_speed = 0; /* full speed by default */ + +/* Panel / LED on, do it right for F/W addressin, too. adisplay will + * just ignore ids>7, as the panel has only 7 digits available */ +#define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \ + outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \ + outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \ + if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \ + outb((char)(ad+48), MOD95_LED_PORT); } \ + if ((display_mode & LED_ACTIVITY)||(!display_mode)) \ + outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); } + +/* Panel / LED off */ +/* bug fixed, Dec 15, 1997, where | was replaced by & here */ +#define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \ + outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \ + outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \ + if ((display_mode & LED_ACTIVITY)||(!display_mode)) \ + outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); } + +/*list of supported subsystems */ +struct subsys_list_struct { + unsigned short mca_id; + char *description; +}; + +/* types of different supported hardware that goes to hostdata special */ +#define IBM_SCSI2_FW 0 +#define IBM_7568_WCACHE 1 +#define IBM_EXP_UNIT 2 +#define IBM_SCSI_WCACHE 3 +#define IBM_SCSI 4 + +/* other special flags for hostdata structure */ +#define FORCED_DETECTION 100 +#define INTEGRATED_SCSI 101 + +/* List of possible IBM-SCSI-adapters */ +static struct subsys_list_struct subsys_list[] = { + {0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */ + {0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */ + {0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */ + {0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */ + {0x8efe, "IBM SCSI Adapter"}, /* special = 4 */ +}; + +/* Max number of logical devices (can be up from 0 to 14). 15 is the address +of the adapter itself. */ +#define MAX_LOG_DEV 15 + +/*local data for a logical device */ +struct logical_device { + struct im_scb scb; /* SCSI-subsystem-control-block structure */ + struct im_tsb tsb; /* SCSI command complete status block structure */ + struct im_sge sge[16]; /* scatter gather list structure */ + unsigned char buf[256]; /* SCSI command return data buffer */ + Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */ + int device_type; /* type of the SCSI-device. See include/scsi/scsi.h + for interpretation of the possible values */ + int block_length; /* blocksize of a particular logical SCSI-device */ + int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */ + int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */ +}; + +/* statistics of the driver during operations (for proc_info) */ +struct Driver_Statistics { + /* SCSI statistics on the adapter */ + int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */ + int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */ + int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */ + int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */ + int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */ + int scbs; /* short SCBs queued */ + int long_scbs; /* long SCBs queued */ + int total_accesses; /* total accesses on all ldns */ + int total_interrupts; /* total interrupts (should be + same as total_accesses) */ + int total_errors; /* command completed with error */ + /* dynamical assignment statistics */ + int total_scsi_devices; /* number of physical pun,lun */ + int dyn_flag; /* flag showing dynamical mode */ + int dynamical_assignments; /* number of remappings of ldns */ + int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each + ldn */ +}; + +/* data structure for each host adapter */ +struct ibmmca_hostdata { + /* array of logical devices: */ + struct logical_device _ld[MAX_LOG_DEV + 1]; + /* array to convert (pun, lun) into logical device number: */ + unsigned char _get_ldn[16][8]; + /*array that contains the information about the physical SCSI-devices + attached to this host adapter: */ + unsigned char _get_scsi[16][8]; + /* used only when checking logical devices: */ + int _local_checking_phase_flag; + /* report received interrupt: */ + int _got_interrupt; + /* report termination-status of SCSI-command: */ + int _stat_result; + /* reset status (used only when doing reset): */ + int _reset_status; + /* code of the last SCSI command (needed for panic info): */ + int _last_scsi_command[MAX_LOG_DEV + 1]; + /* identifier of the last SCSI-command type */ + int _last_scsi_type[MAX_LOG_DEV + 1]; + /* last blockcount */ + int _last_scsi_blockcount[MAX_LOG_DEV + 1]; + /* last locgical block address */ + unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1]; + /* Counter that points on the next reassignable ldn for dynamical + remapping. The default value is 7, that is the first reassignable + number in the list at boottime: */ + int _next_ldn; + /* Statistics-structure for this IBM-SCSI-host: */ + struct Driver_Statistics _IBM_DS; + /* This hostadapters pos-registers pos2 until pos6 */ + unsigned int _pos[8]; + /* assign a special variable, that contains dedicated info about the + adaptertype */ + int _special; + /* connector size on the MCA bus */ + int _connector_size; + /* synchronous SCSI transfer rate bitpattern */ + int _adapter_speed; +}; + +/* macros to access host data structure */ +#define subsystem_pun(hi) (hosts[(hi)]->this_id) +#define subsystem_maxid(hi) (hosts[(hi)]->max_id) +#define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld) +#define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn) +#define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi) +#define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag) +#define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt) +#define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result) +#define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status) +#define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command) +#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type) +#define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount) +#define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block) +#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type) +#define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn) +#define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS) +#define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special) +#define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size) +#define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed) +#define pos2(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[2]) +#define pos3(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[3]) +#define pos4(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[4]) +#define pos5(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[5]) +#define pos6(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_pos[6]) + +/* Define a arbitrary number as subsystem-marker-type. This number is, as + described in the ANSI-SCSI-standard, not occupied by other device-types. */ +#define TYPE_IBM_SCSI_ADAPTER 0x2F + +/* Define 0xFF for no device type, because this type is not defined within + the ANSI-SCSI-standard, therefore, it can be used and should not cause any + harm. */ +#define TYPE_NO_DEVICE 0xFF + +/* define medium-changer. If this is not defined previously, e.g. Linux + 2.0.x, define this type here. */ +#ifndef TYPE_MEDIUM_CHANGER +#define TYPE_MEDIUM_CHANGER 0x08 +#endif + +/* define possible operations for the immediate_assign command */ +#define SET_LDN 0 +#define REMOVE_LDN 1 + +/* ldn which is used to probe the SCSI devices */ +#define PROBE_LDN 0 + +/* reset status flag contents */ +#define IM_RESET_NOT_IN_PROGRESS 0 +#define IM_RESET_IN_PROGRESS 1 +#define IM_RESET_FINISHED_OK 2 +#define IM_RESET_FINISHED_FAIL 3 +#define IM_RESET_NOT_IN_PROGRESS_NO_INT 4 +#define IM_RESET_FINISHED_OK_NO_INT 5 + +/* define undefined SCSI-command */ +#define NO_SCSI 0xffff + +/*-----------------------------------------------------------------------*/ + +/* if this is nonzero, ibmmcascsi option has been passed to the kernel */ +static int io_port[IM_MAX_HOSTS] = { 0, 0, 0, 0, 0, 0, 0, 0 }; +static int scsi_id[IM_MAX_HOSTS] = { 7, 7, 7, 7, 7, 7, 7, 7 }; + +/* fill module-parameters only, when this define is present. + (that is kernel version 2.1.x) */ +#if defined(MODULE) +static char *boot_options = NULL; +module_param(boot_options, charp, 0); +module_param_array(io_port, int, NULL, 0); +module_param_array(scsi_id, int, NULL, 0); + +#if 0 /* FIXME: No longer exist? --RR */ +MODULE_PARM(display, "1i"); +MODULE_PARM(adisplay, "1i"); +MODULE_PARM(normal, "1i"); +MODULE_PARM(ansi, "1i"); +#endif +#endif +/*counter of concurrent disk read/writes, to turn on/off disk led */ +static int disk_rw_in_progress = 0; + +/* host information */ +static int found = 0; +static struct Scsi_Host *hosts[IM_MAX_HOSTS + 1] = { + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL +}; +static unsigned int pos[8]; /* whole pos register-line for diagnosis */ +/* Taking into account the additions, made by ZP Gu. + * This selects now the preset value from the configfile and + * offers the 'normal' commandline option to be accepted */ +#ifdef CONFIG_IBMMCA_SCSI_ORDER_STANDARD +static char ibm_ansi_order = 1; +#else +static char ibm_ansi_order = 0; +#endif + +static void issue_cmd(int, unsigned long, unsigned char); +static void internal_done(Scsi_Cmnd * cmd); +static void check_devices(int, int); +static int immediate_assign(int, unsigned int, unsigned int, unsigned int, unsigned int); +static int immediate_feature(int, unsigned int, unsigned int); +#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET +static int immediate_reset(int, unsigned int); +#endif +static int device_inquiry(int, int); +static int read_capacity(int, int); +static int get_pos_info(int); +static char *ti_p(int); +static char *ti_l(int); +static char *ibmrate(unsigned int, int); +static int probe_display(int); +static int probe_bus_mode(int); +static int device_exists(int, int, int *, int *); +static struct Scsi_Host *ibmmca_register(Scsi_Host_Template *, int, int, int, char *); +static int option_setup(char *); +/* local functions needed for proc_info */ +static int ldn_access_load(int, int); +static int ldn_access_total_read_write(int); + +static irqreturn_t interrupt_handler(int irq, void *dev_id, + struct pt_regs *regs) +{ + int host_index, ihost_index; + unsigned int intr_reg; + unsigned int cmd_result; + unsigned int ldn; + Scsi_Cmnd *cmd; + int lastSCSI; + struct Scsi_Host *dev = dev_id; + + spin_lock(dev->host_lock); + /* search for one adapter-response on shared interrupt */ + for (host_index = 0; hosts[host_index] && !(inb(IM_STAT_REG(host_index)) & IM_INTR_REQUEST); host_index++); + /* return if some other device on this IRQ caused the interrupt */ + if (!hosts[host_index]) { + spin_unlock(dev->host_lock); + return IRQ_NONE; + } + + /* the reset-function already did all the job, even ints got + renabled on the subsystem, so just return */ + if ((reset_status(host_index) == IM_RESET_NOT_IN_PROGRESS_NO_INT) || (reset_status(host_index) == IM_RESET_FINISHED_OK_NO_INT)) { + reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS; + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } + + /*must wait for attention reg not busy, then send EOI to subsystem */ + while (1) { + if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) + break; + cpu_relax(); + } + ihost_index = host_index; + /*get command result and logical device */ + intr_reg = (unsigned char) (inb(IM_INTR_REG(ihost_index))); + cmd_result = intr_reg & 0xf0; + ldn = intr_reg & 0x0f; + /* get the last_scsi_command here */ + lastSCSI = last_scsi_command(ihost_index)[ldn]; + outb(IM_EOI | ldn, IM_ATTN_REG(ihost_index)); + + /*these should never happen (hw fails, or a local programming bug) */ + if (!global_command_error_excuse) { + switch (cmd_result) { + /* Prevent from Ooopsing on error to show the real reason */ + case IM_ADAPTER_HW_FAILURE: + case IM_SOFTWARE_SEQUENCING_ERROR: + case IM_CMD_ERROR: + printk(KERN_ERR "IBM MCA SCSI: Fatal Subsystem ERROR!\n"); + printk(KERN_ERR " Last cmd=0x%x, ena=%x, len=", lastSCSI, ld(ihost_index)[ldn].scb.enable); + if (ld(ihost_index)[ldn].cmd) + printk("%ld/%ld,", (long) (ld(ihost_index)[ldn].cmd->request_bufflen), (long) (ld(ihost_index)[ldn].scb.sys_buf_length)); + else + printk("none,"); + if (ld(ihost_index)[ldn].cmd) + printk("Blocksize=%d", ld(ihost_index)[ldn].scb.u2.blk.length); + else + printk("Blocksize=none"); + printk(", host=0x%x, ldn=0x%x\n", ihost_index, ldn); + if (ld(ihost_index)[ldn].cmd) { + printk(KERN_ERR "Blockcount=%d/%d\n", last_scsi_blockcount(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u2.blk.count); + printk(KERN_ERR "Logical block=%lx/%lx\n", last_scsi_logical_block(ihost_index)[ldn], ld(ihost_index)[ldn].scb.u1.log_blk_adr); + } + printk(KERN_ERR "Reason given: %s\n", (cmd_result == IM_ADAPTER_HW_FAILURE) ? "HARDWARE FAILURE" : (cmd_result == IM_SOFTWARE_SEQUENCING_ERROR) ? "SOFTWARE SEQUENCING ERROR" : (cmd_result == IM_CMD_ERROR) ? "COMMAND ERROR" : "UNKNOWN"); + /* if errors appear, enter this section to give detailed info */ + printk(KERN_ERR "IBM MCA SCSI: Subsystem Error-Status follows:\n"); + printk(KERN_ERR " Command Type................: %x\n", last_scsi_type(ihost_index)[ldn]); + printk(KERN_ERR " Attention Register..........: %x\n", inb(IM_ATTN_REG(ihost_index))); + printk(KERN_ERR " Basic Control Register......: %x\n", inb(IM_CTR_REG(ihost_index))); + printk(KERN_ERR " Interrupt Status Register...: %x\n", intr_reg); + printk(KERN_ERR " Basic Status Register.......: %x\n", inb(IM_STAT_REG(ihost_index))); + if ((last_scsi_type(ihost_index)[ldn] == IM_SCB) || (last_scsi_type(ihost_index)[ldn] == IM_LONG_SCB)) { + printk(KERN_ERR " SCB-Command.................: %x\n", ld(ihost_index)[ldn].scb.command); + printk(KERN_ERR " SCB-Enable..................: %x\n", ld(ihost_index)[ldn].scb.enable); + printk(KERN_ERR " SCB-logical block address...: %lx\n", ld(ihost_index)[ldn].scb.u1.log_blk_adr); + printk(KERN_ERR " SCB-system buffer address...: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_adr); + printk(KERN_ERR " SCB-system buffer length....: %lx\n", ld(ihost_index)[ldn].scb.sys_buf_length); + printk(KERN_ERR " SCB-tsb address.............: %lx\n", ld(ihost_index)[ldn].scb.tsb_adr); + printk(KERN_ERR " SCB-Chain address...........: %lx\n", ld(ihost_index)[ldn].scb.scb_chain_adr); + printk(KERN_ERR " SCB-block count.............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.count); + printk(KERN_ERR " SCB-block length............: %x\n", ld(ihost_index)[ldn].scb.u2.blk.length); + } + printk(KERN_ERR " Send this report to the maintainer.\n"); + panic("IBM MCA SCSI: Fatal error message from the subsystem (0x%X,0x%X)!\n", lastSCSI, cmd_result); + break; + } + } else { + /* The command error handling is made silent, but we tell the + * calling function, that there is a reported error from the + * adapter. */ + switch (cmd_result) { + case IM_ADAPTER_HW_FAILURE: + case IM_SOFTWARE_SEQUENCING_ERROR: + case IM_CMD_ERROR: + global_command_error_excuse = CMD_FAIL; + break; + default: + global_command_error_excuse = 0; + break; + } + } + /* if no panic appeared, increase the interrupt-counter */ + IBM_DS(ihost_index).total_interrupts++; + /*only for local checking phase */ + if (local_checking_phase_flag(ihost_index)) { + stat_result(ihost_index) = cmd_result; + got_interrupt(ihost_index) = 1; + reset_status(ihost_index) = IM_RESET_FINISHED_OK; + last_scsi_command(ihost_index)[ldn] = NO_SCSI; + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } + /* handling of commands coming from upper level of scsi driver */ + if (last_scsi_type(ihost_index)[ldn] == IM_IMM_CMD) { + /* verify ldn, and may handle rare reset immediate command */ + if ((reset_status(ihost_index) == IM_RESET_IN_PROGRESS) && (last_scsi_command(ihost_index)[ldn] == IM_RESET_IMM_CMD)) { + if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) { + disk_rw_in_progress = 0; + PS2_DISK_LED_OFF(); + reset_status(ihost_index) = IM_RESET_FINISHED_FAIL; + } else { + /*reset disk led counter, turn off disk led */ + disk_rw_in_progress = 0; + PS2_DISK_LED_OFF(); + reset_status(ihost_index) = IM_RESET_FINISHED_OK; + } + stat_result(ihost_index) = cmd_result; + last_scsi_command(ihost_index)[ldn] = NO_SCSI; + last_scsi_type(ihost_index)[ldn] = 0; + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } else if (last_scsi_command(ihost_index)[ldn] == IM_ABORT_IMM_CMD) { + /* react on SCSI abort command */ +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Interrupt from SCSI-abort.\n"); +#endif + disk_rw_in_progress = 0; + PS2_DISK_LED_OFF(); + cmd = ld(ihost_index)[ldn].cmd; + ld(ihost_index)[ldn].cmd = NULL; + if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) + cmd->result = DID_NO_CONNECT << 16; + else + cmd->result = DID_ABORT << 16; + stat_result(ihost_index) = cmd_result; + last_scsi_command(ihost_index)[ldn] = NO_SCSI; + last_scsi_type(ihost_index)[ldn] = 0; + if (cmd->scsi_done) + (cmd->scsi_done) (cmd); /* should be the internal_done */ + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } else { + disk_rw_in_progress = 0; + PS2_DISK_LED_OFF(); + reset_status(ihost_index) = IM_RESET_FINISHED_OK; + stat_result(ihost_index) = cmd_result; + last_scsi_command(ihost_index)[ldn] = NO_SCSI; + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } + } + last_scsi_command(ihost_index)[ldn] = NO_SCSI; + last_scsi_type(ihost_index)[ldn] = 0; + cmd = ld(ihost_index)[ldn].cmd; + ld(ihost_index)[ldn].cmd = NULL; +#ifdef IM_DEBUG_TIMEOUT + if (cmd) { + if ((cmd->target == TIMEOUT_PUN) && (cmd->device->lun == TIMEOUT_LUN)) { + printk("IBM MCA SCSI: Ignoring interrupt from pun=%x, lun=%x.\n", cmd->target, cmd->device->lun); + return IRQ_HANDLED; + } + } +#endif + /*if no command structure, just return, else clear cmd */ + if (!cmd) + { + spin_unlock(dev->host_lock); + return IRQ_HANDLED; + } + +#ifdef IM_DEBUG_INT + printk("cmd=%02x ireg=%02x ds=%02x cs=%02x de=%02x ce=%02x\n", cmd->cmnd[0], intr_reg, ld(ihost_index)[ldn].tsb.dev_status, ld(ihost_index)[ldn].tsb.cmd_status, ld(ihost_index)[ldn].tsb.dev_error, ld(ihost_index)[ldn].tsb.cmd_error); +#endif + /*if this is end of media read/write, may turn off PS/2 disk led */ + if ((ld(ihost_index)[ldn].device_type != TYPE_NO_LUN) && (ld(ihost_index)[ldn].device_type != TYPE_NO_DEVICE)) { + /* only access this, if there was a valid device addressed */ + if (--disk_rw_in_progress == 0) + PS2_DISK_LED_OFF(); + } + + /* IBM describes the status-mask to be 0x1e, but this is not conform + * with SCSI-definition, I suppose, the reason for it is that IBM + * adapters do not support CMD_TERMINATED, TASK_SET_FULL and + * ACA_ACTIVE as returning statusbyte information. (ML) */ + if (cmd_result == IM_CMD_COMPLETED_WITH_FAILURE) { + cmd->result = (unsigned char) (ld(ihost_index)[ldn].tsb.dev_status & 0x1e); + IBM_DS(ihost_index).total_errors++; + } else + cmd->result = 0; + /* write device status into cmd->result, and call done function */ + if (lastSCSI == NO_SCSI) { /* unexpected interrupt :-( */ + cmd->result |= DID_BAD_INTR << 16; + printk("IBM MCA SCSI: WARNING - Interrupt from non-pending SCSI-command!\n"); + } else /* things went right :-) */ + cmd->result |= DID_OK << 16; + if (cmd->scsi_done) + (cmd->scsi_done) (cmd); + spin_unlock(dev->host_lock); + return IRQ_HANDLED; +} + +static void issue_cmd(int host_index, unsigned long cmd_reg, unsigned char attn_reg) +{ + unsigned long flags; + /* must wait for attention reg not busy */ + while (1) { + spin_lock_irqsave(hosts[host_index]->host_lock, flags); + if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) + break; + spin_unlock_irqrestore(hosts[host_index]->host_lock, flags); + } + /* write registers and enable system interrupts */ + outl(cmd_reg, IM_CMD_REG(host_index)); + outb(attn_reg, IM_ATTN_REG(host_index)); + spin_unlock_irqrestore(hosts[host_index]->host_lock, flags); +} + +static void internal_done(Scsi_Cmnd * cmd) +{ + cmd->SCp.Status++; + return; +} + +/* SCSI-SCB-command for device_inquiry */ +static int device_inquiry(int host_index, int ldn) +{ + int retr; + struct im_scb *scb; + struct im_tsb *tsb; + unsigned char *buf; + + scb = &(ld(host_index)[ldn].scb); + tsb = &(ld(host_index)[ldn].tsb); + buf = (unsigned char *) (&(ld(host_index)[ldn].buf)); + ld(host_index)[ldn].tsb.dev_status = 0; /* prepare statusblock */ + for (retr = 0; retr < 3; retr++) { + /* fill scb with inquiry command */ + scb->command = IM_DEVICE_INQUIRY_CMD | IM_NO_DISCONNECT; + scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_RETRY_ENABLE | IM_BYPASS_BUFFER; + last_scsi_command(host_index)[ldn] = IM_DEVICE_INQUIRY_CMD; + last_scsi_type(host_index)[ldn] = IM_SCB; + scb->sys_buf_adr = isa_virt_to_bus(buf); + scb->sys_buf_length = 255; /* maximum bufferlength gives max info */ + scb->tsb_adr = isa_virt_to_bus(tsb); + /* issue scb to passed ldn, and busy wait for interrupt */ + got_interrupt(host_index) = 0; + issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn); + while (!got_interrupt(host_index)) + barrier(); + + /*if command succesful, break */ + if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES)) + return 1; + } + /*if all three retries failed, return "no device at this ldn" */ + if (retr >= 3) + return 0; + else + return 1; +} + +static int read_capacity(int host_index, int ldn) +{ + int retr; + struct im_scb *scb; + struct im_tsb *tsb; + unsigned char *buf; + + scb = &(ld(host_index)[ldn].scb); + tsb = &(ld(host_index)[ldn].tsb); + buf = (unsigned char *) (&(ld(host_index)[ldn].buf)); + ld(host_index)[ldn].tsb.dev_status = 0; + for (retr = 0; retr < 3; retr++) { + /*fill scb with read capacity command */ + scb->command = IM_READ_CAPACITY_CMD; + scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_READ_CONTROL | IM_RETRY_ENABLE | IM_BYPASS_BUFFER; + last_scsi_command(host_index)[ldn] = IM_READ_CAPACITY_CMD; + last_scsi_type(host_index)[ldn] = IM_SCB; + scb->sys_buf_adr = isa_virt_to_bus(buf); + scb->sys_buf_length = 8; + scb->tsb_adr = isa_virt_to_bus(tsb); + /*issue scb to passed ldn, and busy wait for interrupt */ + got_interrupt(host_index) = 0; + issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn); + while (!got_interrupt(host_index)) + barrier(); + + /*if got capacity, get block length and return one device found */ + if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES)) + return 1; + } + /*if all three retries failed, return "no device at this ldn" */ + if (retr >= 3) + return 0; + else + return 1; +} + +static int get_pos_info(int host_index) +{ + int retr; + struct im_scb *scb; + struct im_tsb *tsb; + unsigned char *buf; + + scb = &(ld(host_index)[MAX_LOG_DEV].scb); + tsb = &(ld(host_index)[MAX_LOG_DEV].tsb); + buf = (unsigned char *) (&(ld(host_index)[MAX_LOG_DEV].buf)); + ld(host_index)[MAX_LOG_DEV].tsb.dev_status = 0; + for (retr = 0; retr < 3; retr++) { + /*fill scb with get_pos_info command */ + scb->command = IM_GET_POS_INFO_CMD; + scb->enable = IM_READ_CONTROL | IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE | IM_BYPASS_BUFFER; + last_scsi_command(host_index)[MAX_LOG_DEV] = IM_GET_POS_INFO_CMD; + last_scsi_type(host_index)[MAX_LOG_DEV] = IM_SCB; + scb->sys_buf_adr = isa_virt_to_bus(buf); + if (special(host_index) == IBM_SCSI2_FW) + scb->sys_buf_length = 256; /* get all info from F/W adapter */ + else + scb->sys_buf_length = 18; /* get exactly 18 bytes for other SCSI */ + scb->tsb_adr = isa_virt_to_bus(tsb); + /*issue scb to ldn=15, and busy wait for interrupt */ + got_interrupt(host_index) = 0; + issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | MAX_LOG_DEV); + + /* FIXME: timeout */ + while (!got_interrupt(host_index)) + barrier(); + + /*if got POS-stuff, get block length and return one device found */ + if ((stat_result(host_index) == IM_SCB_CMD_COMPLETED) || (stat_result(host_index) == IM_SCB_CMD_COMPLETED_WITH_RETRIES)) + return 1; + } + /* if all three retries failed, return "no device at this ldn" */ + if (retr >= 3) + return 0; + else + return 1; +} + +/* SCSI-immediate-command for assign. This functions maps/unmaps specific + ldn-numbers on SCSI (PUN,LUN). It is needed for presetting of the + subsystem and for dynamical remapping od ldns. */ +static int immediate_assign(int host_index, unsigned int pun, unsigned int lun, unsigned int ldn, unsigned int operation) +{ + int retr; + unsigned long imm_cmd; + + for (retr = 0; retr < 3; retr++) { + /* select mutation level of the SCSI-adapter */ + switch (special(host_index)) { + case IBM_SCSI2_FW: + imm_cmd = (unsigned long) (IM_ASSIGN_IMM_CMD); + imm_cmd |= (unsigned long) ((lun & 7) << 24); + imm_cmd |= (unsigned long) ((operation & 1) << 23); + imm_cmd |= (unsigned long) ((pun & 7) << 20) | ((pun & 8) << 24); + imm_cmd |= (unsigned long) ((ldn & 15) << 16); + break; + default: + imm_cmd = inl(IM_CMD_REG(host_index)); + imm_cmd &= (unsigned long) (0xF8000000); /* keep reserved bits */ + imm_cmd |= (unsigned long) (IM_ASSIGN_IMM_CMD); + imm_cmd |= (unsigned long) ((lun & 7) << 24); + imm_cmd |= (unsigned long) ((operation & 1) << 23); + imm_cmd |= (unsigned long) ((pun & 7) << 20); + imm_cmd |= (unsigned long) ((ldn & 15) << 16); + break; + } + last_scsi_command(host_index)[MAX_LOG_DEV] = IM_ASSIGN_IMM_CMD; + last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD; + got_interrupt(host_index) = 0; + issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV); + while (!got_interrupt(host_index)) + barrier(); + + /*if command succesful, break */ + if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED) + return 1; + } + if (retr >= 3) + return 0; + else + return 1; +} + +static int immediate_feature(int host_index, unsigned int speed, unsigned int timeout) +{ + int retr; + unsigned long imm_cmd; + + for (retr = 0; retr < 3; retr++) { + /* select mutation level of the SCSI-adapter */ + imm_cmd = IM_FEATURE_CTR_IMM_CMD; + imm_cmd |= (unsigned long) ((speed & 0x7) << 29); + imm_cmd |= (unsigned long) ((timeout & 0x1fff) << 16); + last_scsi_command(host_index)[MAX_LOG_DEV] = IM_FEATURE_CTR_IMM_CMD; + last_scsi_type(host_index)[MAX_LOG_DEV] = IM_IMM_CMD; + got_interrupt(host_index) = 0; + /* we need to run into command errors in order to probe for the + * right speed! */ + global_command_error_excuse = 1; + issue_cmd(host_index, (unsigned long) (imm_cmd), IM_IMM_CMD | MAX_LOG_DEV); + + /* FIXME: timeout */ + while (!got_interrupt(host_index)) + barrier(); + if (global_command_error_excuse == CMD_FAIL) { + global_command_error_excuse = 0; + return 2; + } else + global_command_error_excuse = 0; + /*if command succesful, break */ + if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED) + return 1; + } + if (retr >= 3) + return 0; + else + return 1; +} + +#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET +static int immediate_reset(int host_index, unsigned int ldn) +{ + int retries; + int ticks; + unsigned long imm_command; + + for (retries = 0; retries < 3; retries++) { + imm_command = inl(IM_CMD_REG(host_index)); + imm_command &= (unsigned long) (0xFFFF0000); /* keep reserved bits */ + imm_command |= (unsigned long) (IM_RESET_IMM_CMD); + last_scsi_command(host_index)[ldn] = IM_RESET_IMM_CMD; + last_scsi_type(host_index)[ldn] = IM_IMM_CMD; + got_interrupt(host_index) = 0; + reset_status(host_index) = IM_RESET_IN_PROGRESS; + issue_cmd(host_index, (unsigned long) (imm_command), IM_IMM_CMD | ldn); + ticks = IM_RESET_DELAY * HZ; + while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks) { + udelay((1 + 999 / HZ) * 1000); + barrier(); + } + /* if reset did not complete, just complain */ + if (!ticks) { + printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY); + reset_status(host_index) = IM_RESET_FINISHED_OK; + /* did not work, finish */ + return 1; + } + /*if command succesful, break */ + if (stat_result(host_index) == IM_IMMEDIATE_CMD_COMPLETED) + return 1; + } + if (retries >= 3) + return 0; + else + return 1; +} +#endif + +/* type-interpreter for physical device numbers */ +static char *ti_p(int dev) +{ + switch (dev) { + case TYPE_IBM_SCSI_ADAPTER: + return ("A"); + case TYPE_DISK: + return ("D"); + case TYPE_TAPE: + return ("T"); + case TYPE_PROCESSOR: + return ("P"); + case TYPE_WORM: + return ("W"); + case TYPE_ROM: + return ("R"); + case TYPE_SCANNER: + return ("S"); + case TYPE_MOD: + return ("M"); + case TYPE_MEDIUM_CHANGER: + return ("C"); + case TYPE_NO_LUN: + return ("+"); /* show NO_LUN */ + } + return ("-"); /* TYPE_NO_DEVICE and others */ +} + +/* interpreter for logical device numbers (ldn) */ +static char *ti_l(int val) +{ + const char hex[16] = "0123456789abcdef"; + static char answer[2]; + + answer[1] = (char) (0x0); + if (val <= MAX_LOG_DEV) + answer[0] = hex[val]; + else + answer[0] = '-'; + return (char *) &answer; +} + +/* transfers bitpattern of the feature command to values in MHz */ +static char *ibmrate(unsigned int speed, int i) +{ + switch (speed) { + case 0: + return i ? "5.00" : "10.00"; + case 1: + return i ? "4.00" : "8.00"; + case 2: + return i ? "3.33" : "6.66"; + case 3: + return i ? "2.86" : "5.00"; + case 4: + return i ? "2.50" : "4.00"; + case 5: + return i ? "2.22" : "3.10"; + case 6: + return i ? "2.00" : "2.50"; + case 7: + return i ? "1.82" : "2.00"; + } + return "---"; +} + +static int probe_display(int what) +{ + static int rotator = 0; + const char rotor[] = "|/-\\"; + + if (!(display_mode & LED_DISP)) + return 0; + if (!what) { + outl(0x20202020, MOD95_LED_PORT); + outl(0x20202020, MOD95_LED_PORT + 4); + } else { + outb('S', MOD95_LED_PORT + 7); + outb('C', MOD95_LED_PORT + 6); + outb('S', MOD95_LED_PORT + 5); + outb('I', MOD95_LED_PORT + 4); + outb('i', MOD95_LED_PORT + 3); + outb('n', MOD95_LED_PORT + 2); + outb('i', MOD95_LED_PORT + 1); + outb((char) (rotor[rotator]), MOD95_LED_PORT); + rotator++; + if (rotator > 3) + rotator = 0; + } + return 0; +} + +static int probe_bus_mode(int host_index) +{ + struct im_pos_info *info; + int num_bus = 0; + int ldn; + + info = (struct im_pos_info *) (&(ld(host_index)[MAX_LOG_DEV].buf)); + if (get_pos_info(host_index)) { + if (info->connector_size & 0xf000) + subsystem_connector_size(host_index) = 16; + else + subsystem_connector_size(host_index) = 32; + num_bus |= (info->pos_4b & 8) >> 3; + for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { + if ((special(host_index) == IBM_SCSI_WCACHE) || (special(host_index) == IBM_7568_WCACHE)) { + if (!((info->cache_stat >> ldn) & 1)) + ld(host_index)[ldn].cache_flag = 0; + } + if (!((info->retry_stat >> ldn) & 1)) + ld(host_index)[ldn].retry_flag = 0; + } +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: SCSI-Cache bits: "); + for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { + printk("%d", ld(host_index)[ldn].cache_flag); + } + printk("\nIBM MCA SCSI: SCSI-Retry bits: "); + for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { + printk("%d", ld(host_index)[ldn].retry_flag); + } + printk("\n"); +#endif + } + return num_bus; +} + +/* probing scsi devices */ +static void check_devices(int host_index, int adaptertype) +{ + int id, lun, ldn, ticks; + int count_devices; /* local counter for connected device */ + int max_pun; + int num_bus; + int speedrun; /* local adapter_speed check variable */ + + /* assign default values to certain variables */ + ticks = 0; + count_devices = 0; + IBM_DS(host_index).dyn_flag = 0; /* normally no need for dynamical ldn management */ + IBM_DS(host_index).total_errors = 0; /* set errorcounter to 0 */ + next_ldn(host_index) = 7; /* next ldn to be assigned is 7, because 0-6 is 'hardwired' */ + + /* initialize the very important driver-informational arrays/structs */ + memset(ld(host_index), 0, sizeof(ld(host_index))); + for (ldn = 0; ldn <= MAX_LOG_DEV; ldn++) { + last_scsi_command(host_index)[ldn] = NO_SCSI; /* emptify last SCSI-command storage */ + last_scsi_type(host_index)[ldn] = 0; + ld(host_index)[ldn].cache_flag = 1; + ld(host_index)[ldn].retry_flag = 1; + } + memset(get_ldn(host_index), TYPE_NO_DEVICE, sizeof(get_ldn(host_index))); /* this is essential ! */ + memset(get_scsi(host_index), TYPE_NO_DEVICE, sizeof(get_scsi(host_index))); /* this is essential ! */ + for (lun = 0; lun < 8; lun++) { + /* mark the adapter at its pun on all luns */ + get_scsi(host_index)[subsystem_pun(host_index)][lun] = TYPE_IBM_SCSI_ADAPTER; + get_ldn(host_index)[subsystem_pun(host_index)][lun] = MAX_LOG_DEV; /* make sure, the subsystem + ldn is active for all + luns. */ + } + probe_display(0); /* Supercool display usage during SCSI-probing. */ + /* This makes sense, when booting without any */ + /* monitor connected on model XX95. */ + + /* STEP 1: */ + adapter_speed(host_index) = global_adapter_speed; + speedrun = adapter_speed(host_index); + while (immediate_feature(host_index, speedrun, adapter_timeout) == 2) { + probe_display(1); + if (speedrun == 7) + panic("IBM MCA SCSI: Cannot set Synchronous-Transfer-Rate!\n"); + speedrun++; + if (speedrun > 7) + speedrun = 7; + } + adapter_speed(host_index) = speedrun; + /* Get detailed information about the current adapter, necessary for + * device operations: */ + num_bus = probe_bus_mode(host_index); + + /* num_bus contains only valid data for the F/W adapter! */ + if (adaptertype == IBM_SCSI2_FW) { /* F/W SCSI adapter: */ + /* F/W adapter PUN-space extension evaluation: */ + if (num_bus) { + printk(KERN_INFO "IBM MCA SCSI: Separate bus mode (wide-addressing enabled)\n"); + subsystem_maxid(host_index) = 16; + } else { + printk(KERN_INFO "IBM MCA SCSI: Combined bus mode (wide-addressing disabled)\n"); + subsystem_maxid(host_index) = 8; + } + printk(KERN_INFO "IBM MCA SCSI: Sync.-Rate (F/W: 20, Int.: 10, Ext.: %s) MBytes/s\n", ibmrate(speedrun, adaptertype)); + } else /* all other IBM SCSI adapters: */ + printk(KERN_INFO "IBM MCA SCSI: Synchronous-SCSI-Transfer-Rate: %s MBytes/s\n", ibmrate(speedrun, adaptertype)); + + /* assign correct PUN device space */ + max_pun = subsystem_maxid(host_index); + +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Current SCSI-host index: %d\n", host_index); + printk("IBM MCA SCSI: Removing default logical SCSI-device mapping."); +#else + printk(KERN_INFO "IBM MCA SCSI: Dev. Order: %s, Mapping (takes <2min): ", (ibm_ansi_order) ? "ANSI" : "New"); +#endif + for (ldn = 0; ldn < MAX_LOG_DEV; ldn++) { + probe_display(1); +#ifdef IM_DEBUG_PROBE + printk("."); +#endif + immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); /* remove ldn (wherever) */ + } + lun = 0; /* default lun is 0 */ +#ifndef IM_DEBUG_PROBE + printk("cleared,"); +#endif + /* STEP 2: */ +#ifdef IM_DEBUG_PROBE + printk("\nIBM MCA SCSI: Scanning SCSI-devices."); +#endif + for (id = 0; id < max_pun; id++) +#ifdef CONFIG_SCSI_MULTI_LUN + for (lun = 0; lun < 8; lun++) +#endif + { + probe_display(1); +#ifdef IM_DEBUG_PROBE + printk("."); +#endif + if (id != subsystem_pun(host_index)) { + /* if pun is not the adapter: */ + /* set ldn=0 to pun,lun */ + immediate_assign(host_index, id, lun, PROBE_LDN, SET_LDN); + if (device_inquiry(host_index, PROBE_LDN)) { /* probe device */ + get_scsi(host_index)[id][lun] = (unsigned char) (ld(host_index)[PROBE_LDN].buf[0]); + /* entry, even for NO_LUN */ + if (ld(host_index)[PROBE_LDN].buf[0] != TYPE_NO_LUN) + count_devices++; /* a existing device is found */ + } + /* remove ldn */ + immediate_assign(host_index, id, lun, PROBE_LDN, REMOVE_LDN); + } + } +#ifndef IM_DEBUG_PROBE + printk("scanned,"); +#endif + /* STEP 3: */ +#ifdef IM_DEBUG_PROBE + printk("\nIBM MCA SCSI: Mapping SCSI-devices."); +#endif + ldn = 0; + lun = 0; +#ifdef CONFIG_SCSI_MULTI_LUN + for (lun = 0; lun < 8 && ldn < MAX_LOG_DEV; lun++) +#endif + for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) { + probe_display(1); +#ifdef IM_DEBUG_PROBE + printk("."); +#endif + if (id != subsystem_pun(host_index)) { + if (get_scsi(host_index)[id][lun] != TYPE_NO_LUN && get_scsi(host_index)[id][lun] != TYPE_NO_DEVICE) { + /* Only map if accepted type. Always enter for + lun == 0 to get no gaps into ldn-mapping for ldn<7. */ + immediate_assign(host_index, id, lun, ldn, SET_LDN); + get_ldn(host_index)[id][lun] = ldn; /* map ldn */ + if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) { +#ifdef CONFIG_IBMMCA_SCSI_DEV_RESET + printk("resetting device at ldn=%x ... ", ldn); + immediate_reset(host_index, ldn); +#endif + ldn++; + } else { + /* device vanished, probably because we don't know how to + * handle it or because it has problems */ + if (lun > 0) { + /* remove mapping */ + get_ldn(host_index)[id][lun] = TYPE_NO_DEVICE; + immediate_assign(host_index, 0, 0, ldn, REMOVE_LDN); + } else + ldn++; + } + } else if (lun == 0) { + /* map lun == 0, even if no device exists */ + immediate_assign(host_index, id, lun, ldn, SET_LDN); + get_ldn(host_index)[id][lun] = ldn; /* map ldn */ + ldn++; + } + } + } + /* STEP 4: */ + + /* map remaining ldns to non-existing devices */ + for (lun = 1; lun < 8 && ldn < MAX_LOG_DEV; lun++) + for (id = 0; id < max_pun && ldn < MAX_LOG_DEV; id++) { + if (get_scsi(host_index)[id][lun] == TYPE_NO_LUN || get_scsi(host_index)[id][lun] == TYPE_NO_DEVICE) { + probe_display(1); + /* Map remaining ldns only to NON-existing pun,lun + combinations to make sure an inquiry will fail. + For MULTI_LUN, it is needed to avoid adapter autonome + SCSI-remapping. */ + immediate_assign(host_index, id, lun, ldn, SET_LDN); + get_ldn(host_index)[id][lun] = ldn; + ldn++; + } + } +#ifndef IM_DEBUG_PROBE + printk("mapped."); +#endif + printk("\n"); +#ifdef IM_DEBUG_PROBE + if (ibm_ansi_order) + printk("IBM MCA SCSI: Device order: IBM/ANSI (pun=7 is first).\n"); + else + printk("IBM MCA SCSI: Device order: New Industry Standard (pun=0 is first).\n"); +#endif + +#ifdef IM_DEBUG_PROBE + /* Show the physical and logical mapping during boot. */ + printk("IBM MCA SCSI: Determined SCSI-device-mapping:\n"); + printk(" Physical SCSI-Device Map Logical SCSI-Device Map\n"); + printk("ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n"); + for (id = 0; id < max_pun; id++) { + printk("%2d ", id); + for (lun = 0; lun < 8; lun++) + printk("%2s ", ti_p(get_scsi(host_index)[id][lun])); + printk(" %2d ", id); + for (lun = 0; lun < 8; lun++) + printk("%2s ", ti_l(get_ldn(host_index)[id][lun])); + printk("\n"); + } +#endif + + /* assign total number of found SCSI-devices to the statistics struct */ + IBM_DS(host_index).total_scsi_devices = count_devices; + + /* decide for output in /proc-filesystem, if the configuration of + SCSI-devices makes dynamical reassignment of devices necessary */ + if (count_devices >= MAX_LOG_DEV) + IBM_DS(host_index).dyn_flag = 1; /* dynamical assignment is necessary */ + else + IBM_DS(host_index).dyn_flag = 0; /* dynamical assignment is not necessary */ + + /* If no SCSI-devices are assigned, return 1 in order to cause message. */ + if (ldn == 0) + printk("IBM MCA SCSI: Warning: No SCSI-devices found/assigned!\n"); + + /* reset the counters for statistics on the current adapter */ + IBM_DS(host_index).scbs = 0; + IBM_DS(host_index).long_scbs = 0; + IBM_DS(host_index).total_accesses = 0; + IBM_DS(host_index).total_interrupts = 0; + IBM_DS(host_index).dynamical_assignments = 0; + memset(IBM_DS(host_index).ldn_access, 0x0, sizeof(IBM_DS(host_index).ldn_access)); + memset(IBM_DS(host_index).ldn_read_access, 0x0, sizeof(IBM_DS(host_index).ldn_read_access)); + memset(IBM_DS(host_index).ldn_write_access, 0x0, sizeof(IBM_DS(host_index).ldn_write_access)); + memset(IBM_DS(host_index).ldn_inquiry_access, 0x0, sizeof(IBM_DS(host_index).ldn_inquiry_access)); + memset(IBM_DS(host_index).ldn_modeselect_access, 0x0, sizeof(IBM_DS(host_index).ldn_modeselect_access)); + memset(IBM_DS(host_index).ldn_assignments, 0x0, sizeof(IBM_DS(host_index).ldn_assignments)); + probe_display(0); + return; +} + +static int device_exists(int host_index, int ldn, int *block_length, int *device_type) +{ + unsigned char *buf; + /* if no valid device found, return immediately with 0 */ + if (!(device_inquiry(host_index, ldn))) + return 0; + buf = (unsigned char *) (&(ld(host_index)[ldn].buf)); + if (*buf == TYPE_ROM) { + *device_type = TYPE_ROM; + *block_length = 2048; /* (standard blocksize for yellow-/red-book) */ + return 1; + } + if (*buf == TYPE_WORM) { + *device_type = TYPE_WORM; + *block_length = 2048; + return 1; + } + if (*buf == TYPE_DISK) { + *device_type = TYPE_DISK; + if (read_capacity(host_index, ldn)) { + *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24); + return 1; + } else + return 0; + } + if (*buf == TYPE_MOD) { + *device_type = TYPE_MOD; + if (read_capacity(host_index, ldn)) { + *block_length = *(buf + 7) + (*(buf + 6) << 8) + (*(buf + 5) << 16) + (*(buf + 4) << 24); + return 1; + } else + return 0; + } + if (*buf == TYPE_TAPE) { + *device_type = TYPE_TAPE; + *block_length = 0; /* not in use (setting by mt and mtst in op.) */ + return 1; + } + if (*buf == TYPE_PROCESSOR) { + *device_type = TYPE_PROCESSOR; + *block_length = 0; /* they set their stuff on drivers */ + return 1; + } + if (*buf == TYPE_SCANNER) { + *device_type = TYPE_SCANNER; + *block_length = 0; /* they set their stuff on drivers */ + return 1; + } + if (*buf == TYPE_MEDIUM_CHANGER) { + *device_type = TYPE_MEDIUM_CHANGER; + *block_length = 0; /* One never knows, what to expect on a medium + changer device. */ + return 1; + } + return 0; +} + +static void internal_ibmmca_scsi_setup(char *str, int *ints) +{ + int i, j, io_base, id_base; + char *token; + + io_base = 0; + id_base = 0; + if (str) { + j = 0; + while ((token = strsep(&str, ",")) != NULL) { + if (!strcmp(token, "activity")) + display_mode |= LED_ACTIVITY; + if (!strcmp(token, "display")) + display_mode |= LED_DISP; + if (!strcmp(token, "adisplay")) + display_mode |= LED_ADISP; + if (!strcmp(token, "normal")) + ibm_ansi_order = 0; + if (!strcmp(token, "ansi")) + ibm_ansi_order = 1; + if (!strcmp(token, "fast")) + global_adapter_speed = 0; + if (!strcmp(token, "medium")) + global_adapter_speed = 4; + if (!strcmp(token, "slow")) + global_adapter_speed = 7; + if ((*token == '-') || (isdigit(*token))) { + if (!(j % 2) && (io_base < IM_MAX_HOSTS)) + io_port[io_base++] = simple_strtoul(token, NULL, 0); + if ((j % 2) && (id_base < IM_MAX_HOSTS)) + scsi_id[id_base++] = simple_strtoul(token, NULL, 0); + j++; + } + } + } else if (ints) { + for (i = 0; i < IM_MAX_HOSTS && 2 * i + 2 < ints[0]; i++) { + io_port[i] = ints[2 * i + 2]; + scsi_id[i] = ints[2 * i + 2]; + } + } + return; +} + +static int ibmmca_getinfo(char *buf, int slot, void *dev_id) +{ + struct Scsi_Host *shpnt; + int len, speciale, connectore, k; + unsigned int pos[8]; + unsigned long flags; + struct Scsi_Host *dev = dev_id; + + spin_lock_irqsave(dev->host_lock, flags); + + shpnt = dev; /* assign host-structure to local pointer */ + len = 0; /* set filled text-buffer index to 0 */ + /* get the _special contents of the hostdata structure */ + speciale = ((struct ibmmca_hostdata *) shpnt->hostdata)->_special; + connectore = ((struct ibmmca_hostdata *) shpnt->hostdata)->_connector_size; + for (k = 2; k < 4; k++) + pos[k] = ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k]; + if (speciale == FORCED_DETECTION) { /* forced detection */ + len += sprintf(buf + len, + "Adapter category: forced detected\n" "***************************************\n" "*** Forced detected SCSI Adapter ***\n" "*** No chip-information available ***\n" "***************************************\n"); + } else if (speciale == INTEGRATED_SCSI) { + /* if the integrated subsystem has been found automatically: */ + len += sprintf(buf + len, + "Adapter category: integrated\n" "Chip revision level: %d\n" "Chip status: %s\n" "8 kByte NVRAM status: %s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 1) ? "enabled" : "disabled", (pos[2] & 2) ? "locked" : "accessible"); + } else if ((speciale >= 0) && (speciale < (sizeof(subsys_list) / sizeof(struct subsys_list_struct)))) { + /* if the subsystem is a slot adapter */ + len += sprintf(buf + len, "Adapter category: slot-card\n" "ROM Segment Address: "); + if ((pos[2] & 0xf0) == 0xf0) + len += sprintf(buf + len, "off\n"); + else + len += sprintf(buf + len, "0x%x\n", ((pos[2] & 0xf0) << 13) + 0xc0000); + len += sprintf(buf + len, "Chip status: %s\n", (pos[2] & 1) ? "enabled" : "disabled"); + len += sprintf(buf + len, "Adapter I/O Offset: 0x%x\n", ((pos[2] & 0x0e) << 2)); + } else { + len += sprintf(buf + len, "Adapter category: unknown\n"); + } + /* common subsystem information to write to the slotn file */ + len += sprintf(buf + len, "Subsystem PUN: %d\n", shpnt->this_id); + len += sprintf(buf + len, "I/O base address range: 0x%x-0x%x\n", (unsigned int) (shpnt->io_port), (unsigned int) (shpnt->io_port + 7)); + len += sprintf(buf + len, "MCA-slot size: %d bits", connectore); + /* Now make sure, the bufferlength is devidable by 4 to avoid + * paging problems of the buffer. */ + while (len % sizeof(int) != (sizeof(int) - 1)) + len += sprintf(buf + len, " "); + len += sprintf(buf + len, "\n"); + + spin_unlock_irqrestore(shpnt->host_lock, flags); + + return len; +} + +int ibmmca_detect(Scsi_Host_Template * scsi_template) +{ + struct Scsi_Host *shpnt; + int port, id, i, j, k, list_size, slot; + int devices_on_irq_11 = 0; + int devices_on_irq_14 = 0; + int IRQ14_registered = 0; + int IRQ11_registered = 0; + + found = 0; /* make absolutely sure, that found is set to 0 */ + + /* First of all, print the version number of the driver. This is + * important to allow better user bugreports in case of already + * having problems with the MCA_bus probing. */ + printk(KERN_INFO "IBM MCA SCSI: Version %s\n", IBMMCA_SCSI_DRIVER_VERSION); + /* if this is not MCA machine, return "nothing found" */ + if (!MCA_bus) { + printk(KERN_INFO "IBM MCA SCSI: No Microchannel-bus present --> Aborting.\n" " This machine does not have any IBM MCA-bus\n" " or the MCA-Kernel-support is not enabled!\n"); + return 0; + } + +#ifdef MODULE + /* If the driver is run as module, read from conf.modules or cmd-line */ + if (boot_options) + option_setup(boot_options); +#endif + + /* get interrupt request level */ + if (request_irq(IM_IRQ, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) { + printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ); + return 0; + } else + IRQ14_registered++; + + /* if ibmmcascsi setup option was passed to kernel, return "found" */ + for (i = 0; i < IM_MAX_HOSTS; i++) + if (io_port[i] > 0 && scsi_id[i] >= 0 && scsi_id[i] < 8) { + printk("IBM MCA SCSI: forced detected SCSI Adapter, io=0x%x, scsi id=%d.\n", io_port[i], scsi_id[i]); + if ((shpnt = ibmmca_register(scsi_template, io_port[i], scsi_id[i], FORCED_DETECTION, "forced detected SCSI Adapter"))) { + for (k = 2; k < 7; k++) + ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = 0; + ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = FORCED_DETECTION; + mca_set_adapter_name(MCA_INTEGSCSI, "forced detected SCSI Adapter"); + mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt); + mca_mark_as_used(MCA_INTEGSCSI); + devices_on_irq_14++; + } + } + if (found) + return found; + + /* The POS2-register of all PS/2 model SCSI-subsystems has the following + * interpretation of bits: + * Bit 7 - 4 : Chip Revision ID (Release) + * Bit 3 - 2 : Reserved + * Bit 1 : 8k NVRAM Disabled + * Bit 0 : Chip Enable (EN-Signal) + * The POS3-register is interpreted as follows: + * Bit 7 - 5 : SCSI ID + * Bit 4 : Reserved = 0 + * Bit 3 - 0 : Reserved = 0 + * (taken from "IBM, PS/2 Hardware Interface Technical Reference, Common + * Interfaces (1991)"). + * In short words, this means, that IBM PS/2 machines only support + * 1 single subsystem by default. The slot-adapters must have another + * configuration on pos2. Here, one has to assume the following + * things for POS2-register: + * Bit 7 - 4 : Chip Revision ID (Release) + * Bit 3 - 1 : port offset factor + * Bit 0 : Chip Enable (EN-Signal) + * As I found a patch here, setting the IO-registers to 0x3540 forced, + * as there was a 0x05 in POS2 on a model 56, I assume, that the + * port 0x3540 must be fix for integrated SCSI-controllers. + * Ok, this discovery leads to the following implementation: (M.Lang) */ + + /* first look for the IBM SCSI integrated subsystem on the motherboard */ + for (j = 0; j < 8; j++) /* read the pos-information */ + pos[j] = mca_read_stored_pos(MCA_INTEGSCSI, j); + /* pos2 = pos3 = 0xff if there is no integrated SCSI-subsystem present, but + * if we ignore the settings of all surrounding pos registers, it is not + * completely sufficient to only check pos2 and pos3. */ + /* Therefore, now the following if statement is used to + * make sure, we see a real integrated onboard SCSI-interface and no + * internal system information, which gets mapped to some pos registers + * on models 95xx. */ + if ((!pos[0] && !pos[1] && pos[2] > 0 && pos[3] > 0 && !pos[4] && !pos[5] && !pos[6] && !pos[7]) || (pos[0] == 0xff && pos[1] == 0xff && pos[2] < 0xff && pos[3] < 0xff && pos[4] == 0xff && pos[5] == 0xff && pos[6] == 0xff && pos[7] == 0xff)) { + if ((pos[2] & 1) == 1) /* is the subsystem chip enabled ? */ + port = IM_IO_PORT; + else { /* if disabled, no IRQs will be generated, as the chip won't + * listen to the incoming commands and will do really nothing, + * except for listening to the pos-register settings. If this + * happens, I need to hugely think about it, as one has to + * write something to the MCA-Bus pos register in order to + * enable the chip. Normally, IBM-SCSI won't pass the POST, + * when the chip is disabled (see IBM tech. ref.). */ + port = IM_IO_PORT; /* anyway, set the portnumber and warn */ + printk("IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n" " SCSI-operations may not work.\n"); + } + id = (pos[3] & 0xe0) >> 5; /* this is correct and represents the PUN */ + /* give detailed information on the subsystem. This helps me + * additionally during debugging and analyzing bug-reports. */ + printk(KERN_INFO "IBM MCA SCSI: IBM Integrated SCSI Controller ffound, io=0x%x, scsi id=%d,\n", port, id); + printk(KERN_INFO " chip rev.=%d, 8K NVRAM=%s, subsystem=%s\n", ((pos[2] & 0xf0) >> 4), (pos[2] & 2) ? "locked" : "accessible", (pos[2] & 1) ? "enabled." : "disabled."); + + /* register the found integrated SCSI-subsystem */ + if ((shpnt = ibmmca_register(scsi_template, port, id, INTEGRATED_SCSI, "IBM Integrated SCSI Controller"))) + { + for (k = 2; k < 7; k++) + ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k]; + ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = INTEGRATED_SCSI; + mca_set_adapter_name(MCA_INTEGSCSI, "IBM Integrated SCSI Controller"); + mca_set_adapter_procfn(MCA_INTEGSCSI, (MCA_ProcFn) ibmmca_getinfo, shpnt); + mca_mark_as_used(MCA_INTEGSCSI); + devices_on_irq_14++; + } + } + + /* now look for other adapters in MCA slots, */ + /* determine the number of known IBM-SCSI-subsystem types */ + /* see the pos[2] dependence to get the adapter port-offset. */ + list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct); + for (i = 0; i < list_size; i++) { + /* scan each slot for a fitting adapter id */ + slot = 0; /* start at slot 0 */ + while ((slot = mca_find_adapter(subsys_list[i].mca_id, slot)) + != MCA_NOTFOUND) { /* scan through all slots */ + for (j = 0; j < 8; j++) /* read the pos-information */ + pos[j] = mca_read_stored_pos(slot, j); + if ((pos[2] & 1) == 1) + /* is the subsystem chip enabled ? */ + /* (explanations see above) */ + port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); + else { + /* anyway, set the portnumber and warn */ + port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); + printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n"); + printk(KERN_WARNING " SCSI-operations may not work.\n"); + } + if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) { + printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n"); + printk(KERN_ERR " Impossible to determine adapter PUN!\n"); + printk(KERN_ERR " Guessing adapter PUN = 7.\n"); + id = 7; + } else { + id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */ + if (i == IBM_SCSI2_FW) { + id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit + * for F/W adapters */ + } + } + if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) { + /* IRQ11 is used by SCSI-2 F/W Adapter/A */ + printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n"); + /* get interrupt request level */ + if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) { + printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW); + } else + IRQ11_registered++; + } + printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id); + if ((pos[2] & 0xf0) == 0xf0) + printk(KERN_DEBUG" ROM Addr.=off,"); + else + printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000); + printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled."); + + /* register the hostadapter */ + if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) { + for (k = 2; k < 8; k++) + ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k]; + ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i; + mca_set_adapter_name(slot, subsys_list[i].description); + mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt); + mca_mark_as_used(slot); + if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) + devices_on_irq_11++; + else + devices_on_irq_14++; + } + slot++; /* advance to next slot */ + } /* advance to next adapter id in the list of IBM-SCSI-subsystems */ + } + + /* now check for SCSI-adapters, mapped to the integrated SCSI + * area. E.g. a W/Cache in MCA-slot 9(!). Do the check correct here, + * as this is a known effect on some models 95xx. */ + list_size = sizeof(subsys_list) / sizeof(struct subsys_list_struct); + for (i = 0; i < list_size; i++) { + /* scan each slot for a fitting adapter id */ + slot = mca_find_adapter(subsys_list[i].mca_id, MCA_INTEGSCSI); + if (slot != MCA_NOTFOUND) { /* scan through all slots */ + for (j = 0; j < 8; j++) /* read the pos-information */ + pos[j] = mca_read_stored_pos(slot, j); + if ((pos[2] & 1) == 1) { /* is the subsystem chip enabled ? */ + /* (explanations see above) */ + port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); + } else { /* anyway, set the portnumber and warn */ + port = IM_IO_PORT + ((pos[2] & 0x0e) << 2); + printk(KERN_WARNING "IBM MCA SCSI: WARNING - Your SCSI-subsystem is disabled!\n"); + printk(KERN_WARNING " SCSI-operations may not work.\n"); + } + if ((i == IBM_SCSI2_FW) && (pos[6] != 0)) { + printk(KERN_ERR "IBM MCA SCSI: ERROR - Wrong POS(6)-register setting!\n"); + printk(KERN_ERR " Impossible to determine adapter PUN!\n"); + printk(KERN_ERR " Guessing adapter PUN = 7.\n"); + id = 7; + } else { + id = (pos[3] & 0xe0) >> 5; /* get subsystem PUN */ + if (i == IBM_SCSI2_FW) + id |= (pos[3] & 0x10) >> 1; /* get subsystem PUN high-bit + * for F/W adapters */ + } + if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) { + /* IRQ11 is used by SCSI-2 F/W Adapter/A */ + printk(KERN_DEBUG "IBM MCA SCSI: SCSI-2 F/W adapter needs IRQ 11.\n"); + /* get interrupt request level */ + if (request_irq(IM_IRQ_FW, interrupt_handler, SA_SHIRQ, "ibmmcascsi", hosts)) + printk(KERN_ERR "IBM MCA SCSI: Unable to get shared IRQ %d.\n", IM_IRQ_FW); + else + IRQ11_registered++; + } + printk(KERN_INFO "IBM MCA SCSI: %s found in slot %d, io=0x%x, scsi id=%d,\n", subsys_list[i].description, slot + 1, port, id); + if ((pos[2] & 0xf0) == 0xf0) + printk(KERN_DEBUG " ROM Addr.=off,"); + else + printk(KERN_DEBUG " ROM Addr.=0x%x,", ((pos[2] & 0xf0) << 13) + 0xc0000); + printk(KERN_DEBUG " port-offset=0x%x, subsystem=%s\n", ((pos[2] & 0x0e) << 2), (pos[2] & 1) ? "enabled." : "disabled."); + + /* register the hostadapter */ + if ((shpnt = ibmmca_register(scsi_template, port, id, i, subsys_list[i].description))) { + for (k = 2; k < 7; k++) + ((struct ibmmca_hostdata *) shpnt->hostdata)->_pos[k] = pos[k]; + ((struct ibmmca_hostdata *) shpnt->hostdata)->_special = i; + mca_set_adapter_name(slot, subsys_list[i].description); + mca_set_adapter_procfn(slot, (MCA_ProcFn) ibmmca_getinfo, shpnt); + mca_mark_as_used(slot); + if ((i == IBM_SCSI2_FW) && (pos[4] & 0x01) && (pos[6] == 0)) + devices_on_irq_11++; + else + devices_on_irq_14++; + } + slot++; /* advance to next slot */ + } /* advance to next adapter id in the list of IBM-SCSI-subsystems */ + } + if (IRQ11_registered && !devices_on_irq_11) + free_irq(IM_IRQ_FW, hosts); /* no devices on IRQ 11 */ + if (IRQ14_registered && !devices_on_irq_14) + free_irq(IM_IRQ, hosts); /* no devices on IRQ 14 */ + if (!devices_on_irq_11 && !devices_on_irq_14) + printk(KERN_WARNING "IBM MCA SCSI: No IBM SCSI-subsystem adapter attached.\n"); + return found; /* return the number of found SCSI hosts. Should be 1 or 0. */ +} + +static struct Scsi_Host *ibmmca_register(Scsi_Host_Template * scsi_template, int port, int id, int adaptertype, char *hostname) +{ + struct Scsi_Host *shpnt; + int i, j; + unsigned int ctrl; + + /* check I/O region */ + if (!request_region(port, IM_N_IO_PORT, hostname)) { + printk(KERN_ERR "IBM MCA SCSI: Unable to get I/O region 0x%x-0x%x (%d ports).\n", port, port + IM_N_IO_PORT - 1, IM_N_IO_PORT); + return NULL; + } + + /* register host */ + shpnt = scsi_register(scsi_template, sizeof(struct ibmmca_hostdata)); + if (!shpnt) { + printk(KERN_ERR "IBM MCA SCSI: Unable to register host.\n"); + release_region(port, IM_N_IO_PORT); + return NULL; + } + + /* request I/O region */ + hosts[found] = shpnt; /* add new found hostadapter to the list */ + special(found) = adaptertype; /* important assignment or else crash! */ + subsystem_connector_size(found) = 0; /* preset slot-size */ + shpnt->irq = IM_IRQ; /* assign necessary stuff for the adapter */ + shpnt->io_port = port; + shpnt->n_io_port = IM_N_IO_PORT; + shpnt->this_id = id; + shpnt->max_id = 8; /* 8 PUNs are default */ + /* now, the SCSI-subsystem is connected to Linux */ + + ctrl = (unsigned int) (inb(IM_CTR_REG(found))); /* get control-register status */ +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Control Register contents: %x, status: %x\n", ctrl, inb(IM_STAT_REG(found))); + printk("IBM MCA SCSI: This adapters' POS-registers: "); + for (i = 0; i < 8; i++) + printk("%x ", pos[i]); + printk("\n"); +#endif + reset_status(found) = IM_RESET_NOT_IN_PROGRESS; + + for (i = 0; i < 16; i++) /* reset the tables */ + for (j = 0; j < 8; j++) + get_ldn(found)[i][j] = MAX_LOG_DEV; + + /* check which logical devices exist */ + /* after this line, local interrupting is possible: */ + local_checking_phase_flag(found) = 1; + check_devices(found, adaptertype); /* call by value, using the global variable hosts */ + local_checking_phase_flag(found) = 0; + found++; /* now increase index to be prepared for next found subsystem */ + /* an ibm mca subsystem has been detected */ + return shpnt; +} + +static int ibmmca_release(struct Scsi_Host *shpnt) +{ + release_region(shpnt->io_port, shpnt->n_io_port); + if (!(--found)) + free_irq(shpnt->irq, hosts); + return 0; +} + +/* The following routine is the SCSI command queue for the midlevel driver */ +static int ibmmca_queuecommand(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *)) +{ + unsigned int ldn; + unsigned int scsi_cmd; + struct im_scb *scb; + struct Scsi_Host *shpnt; + int current_ldn; + int id, lun; + int target; + int host_index; + int max_pun; + int i; + struct scatterlist *sl; + + shpnt = cmd->device->host; + /* search for the right hostadapter */ + for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++); + + if (!hosts[host_index]) { /* invalid hostadapter descriptor address */ + cmd->result = DID_NO_CONNECT << 16; + if (done) + done(cmd); + return 0; + } + max_pun = subsystem_maxid(host_index); + if (ibm_ansi_order) { + target = max_pun - 1 - cmd->device->id; + if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index))) + target--; + else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index))) + target++; + } else + target = cmd->device->id; + + /* if (target,lun) is NO LUN or not existing at all, return error */ + if ((get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_LUN) || (get_scsi(host_index)[target][cmd->device->lun] == TYPE_NO_DEVICE)) { + cmd->result = DID_NO_CONNECT << 16; + if (done) + done(cmd); + return 0; + } + + /*if (target,lun) unassigned, do further checks... */ + ldn = get_ldn(host_index)[target][cmd->device->lun]; + if (ldn >= MAX_LOG_DEV) { /* on invalid ldn do special stuff */ + if (ldn > MAX_LOG_DEV) { /* dynamical remapping if ldn unassigned */ + current_ldn = next_ldn(host_index); /* stop-value for one circle */ + while (ld(host_index)[next_ldn(host_index)].cmd) { /* search for a occupied, but not in */ + /* command-processing ldn. */ + next_ldn(host_index)++; + if (next_ldn(host_index) >= MAX_LOG_DEV) + next_ldn(host_index) = 7; + if (current_ldn == next_ldn(host_index)) { /* One circle done ? */ + /* no non-processing ldn found */ + 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->device->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->device->lun] = next_ldn(host_index); + /* change ldn to the right value, that is now next_ldn */ + ldn = next_ldn(host_index); + /* unassign all ldns (pun,lun,ldn does not matter for remove) */ + immediate_assign(host_index, 0, 0, 0, REMOVE_LDN); + /* set only LDN for remapped device */ + immediate_assign(host_index, target, cmd->device->lun, ldn, SET_LDN); + /* get device information for ld[ldn] */ + if (device_exists(host_index, ldn, &ld(host_index)[ldn].block_length, &ld(host_index)[ldn].device_type)) { + ld(host_index)[ldn].cmd = NULL; /* To prevent panic set 0, because + devices that were not assigned, + should have nothing in progress. */ + get_scsi(host_index)[target][cmd->device->lun] = ld(host_index)[ldn].device_type; + /* increase assignment counters for statistics in /proc */ + IBM_DS(host_index).dynamical_assignments++; + IBM_DS(host_index).ldn_assignments[ldn]++; + } else + /* panic here, because a device, found at boottime has + vanished */ + panic("IBM MCA SCSI: ldn=0x%x, SCSI-device on (%d,%d) vanished!\n", ldn, target, cmd->device->lun); + /* unassign again all ldns (pun,lun,ldn does not matter for remove) */ + immediate_assign(host_index, 0, 0, 0, REMOVE_LDN); + /* remap all ldns, as written in the pun/lun table */ + lun = 0; +#ifdef CONFIG_SCSI_MULTI_LUN + for (lun = 0; lun < 8; lun++) +#endif + for (id = 0; id < max_pun; id++) { + if (get_ldn(host_index)[id][lun] <= MAX_LOG_DEV) + immediate_assign(host_index, id, lun, get_ldn(host_index)[id][lun], SET_LDN); + } + /* set back to normal interrupt_handling */ + local_checking_phase_flag(host_index) = 0; +#ifdef IM_DEBUG_PROBE + /* Information on syslog terminal */ + printk("IBM MCA SCSI: ldn=0x%x dynamically reassigned to (%d,%d).\n", ldn, target, cmd->device->lun); +#endif + /* increase next_ldn for next dynamical assignment */ + next_ldn(host_index)++; + if (next_ldn(host_index) >= MAX_LOG_DEV) + next_ldn(host_index) = 7; + } else { /* wall against Linux accesses to the subsystem adapter */ + cmd->result = DID_BAD_TARGET << 16; + if (done) + done(cmd); + return 0; + } + } + + /*verify there is no command already in progress for this log dev */ + if (ld(host_index)[ldn].cmd) + panic("IBM MCA SCSI: cmd already in progress for this ldn.\n"); + + /*save done in cmd, and save cmd for the interrupt handler */ + cmd->scsi_done = done; + ld(host_index)[ldn].cmd = cmd; + + /*fill scb information independent of the scsi command */ + scb = &(ld(host_index)[ldn].scb); + ld(host_index)[ldn].tsb.dev_status = 0; + scb->enable = IM_REPORT_TSB_ONLY_ON_ERROR | IM_RETRY_ENABLE; + scb->tsb_adr = isa_virt_to_bus(&(ld(host_index)[ldn].tsb)); + scsi_cmd = cmd->cmnd[0]; + + if (cmd->use_sg) { + i = cmd->use_sg; + sl = (struct scatterlist *) (cmd->request_buffer); + if (i > 16) + panic("IBM MCA SCSI: scatter-gather list too long.\n"); + while (--i >= 0) { + ld(host_index)[ldn].sge[i].address = (void *) (isa_page_to_bus(sl[i].page) + sl[i].offset); + ld(host_index)[ldn].sge[i].byte_length = sl[i].length; + } + scb->enable |= IM_POINTER_TO_LIST; + scb->sys_buf_adr = isa_virt_to_bus(&(ld(host_index)[ldn].sge[0])); + scb->sys_buf_length = cmd->use_sg * sizeof(struct im_sge); + } else { + scb->sys_buf_adr = isa_virt_to_bus(cmd->request_buffer); + /* recent Linux midlevel SCSI places 1024 byte for inquiry + * command. Far too much for old PS/2 hardware. */ + switch (scsi_cmd) { + /* avoid command errors by setting bufferlengths to + * ANSI-standard. Beware of forcing it to 255, + * this could SEGV the kernel!!! */ + case INQUIRY: + case REQUEST_SENSE: + case MODE_SENSE: + case MODE_SELECT: + if (cmd->request_bufflen > 255) + scb->sys_buf_length = 255; + else + scb->sys_buf_length = cmd->request_bufflen; + break; + case TEST_UNIT_READY: + scb->sys_buf_length = 0; + break; + default: + scb->sys_buf_length = cmd->request_bufflen; + break; + } + } + /*fill scb information dependent on scsi command */ + +#ifdef IM_DEBUG_CMD + printk("issue scsi cmd=%02x to ldn=%d\n", scsi_cmd, ldn); +#endif + + /* for specific device-type debugging: */ +#ifdef IM_DEBUG_CMD_SPEC_DEV + if (ld(host_index)[ldn].device_type == IM_DEBUG_CMD_DEVICE) + printk("(SCSI-device-type=0x%x) issue scsi cmd=%02x to ldn=%d\n", ld(host_index)[ldn].device_type, scsi_cmd, ldn); +#endif + + /* for possible panics store current command */ + last_scsi_command(host_index)[ldn] = scsi_cmd; + last_scsi_type(host_index)[ldn] = IM_SCB; + /* update statistical info */ + IBM_DS(host_index).total_accesses++; + IBM_DS(host_index).ldn_access[ldn]++; + + switch (scsi_cmd) { + case READ_6: + case WRITE_6: + case READ_10: + case WRITE_10: + case READ_12: + case WRITE_12: + /* Distinguish between disk and other devices. Only disks (that are the + most frequently accessed devices) should be supported by the + IBM-SCSI-Subsystem commands. */ + switch (ld(host_index)[ldn].device_type) { + case TYPE_DISK: /* for harddisks enter here ... */ + case TYPE_MOD: /* ... try it also for MO-drives (send flames as */ + /* you like, if this won't work.) */ + if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) { + /* read command preparations */ + scb->enable |= IM_READ_CONTROL; + IBM_DS(host_index).ldn_read_access[ldn]++; /* increase READ-access on ldn stat. */ + scb->command = IM_READ_DATA_CMD | IM_NO_DISCONNECT; + } else { /* write command preparations */ + IBM_DS(host_index).ldn_write_access[ldn]++; /* increase write-count on ldn stat. */ + scb->command = IM_WRITE_DATA_CMD | IM_NO_DISCONNECT; + } + if (scsi_cmd == READ_6 || scsi_cmd == WRITE_6) { + scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[3]) << 0) | (((unsigned) cmd->cmnd[2]) << 8) | ((((unsigned) cmd->cmnd[1]) & 0x1f) << 16); + scb->u2.blk.count = (unsigned) cmd->cmnd[4]; + } else { + scb->u1.log_blk_adr = (((unsigned) cmd->cmnd[5]) << 0) | (((unsigned) cmd->cmnd[4]) << 8) | (((unsigned) cmd->cmnd[3]) << 16) | (((unsigned) cmd->cmnd[2]) << 24); + scb->u2.blk.count = (((unsigned) cmd->cmnd[8]) << 0) | (((unsigned) cmd->cmnd[7]) << 8); + } + last_scsi_logical_block(host_index)[ldn] = scb->u1.log_blk_adr; + last_scsi_blockcount(host_index)[ldn] = scb->u2.blk.count; + scb->u2.blk.length = ld(host_index)[ldn].block_length; + break; + /* for other devices, enter here. Other types are not known by + Linux! TYPE_NO_LUN is forbidden as valid device. */ + case TYPE_ROM: + case TYPE_TAPE: + case TYPE_PROCESSOR: + case TYPE_WORM: + case TYPE_SCANNER: + case TYPE_MEDIUM_CHANGER: + /* If there is a sequential-device, IBM recommends to use + IM_OTHER_SCSI_CMD_CMD instead of subsystem READ/WRITE. + This includes CD-ROM devices, too, due to the partial sequential + read capabilities. */ + scb->command = IM_OTHER_SCSI_CMD_CMD; + if (scsi_cmd == READ_6 || scsi_cmd == READ_10 || scsi_cmd == READ_12) + /* enable READ */ + scb->enable |= IM_READ_CONTROL; + scb->enable |= IM_BYPASS_BUFFER; + scb->u1.scsi_cmd_length = cmd->cmd_len; + memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); + last_scsi_type(host_index)[ldn] = IM_LONG_SCB; + /* Read/write on this non-disk devices is also displayworthy, + so flash-up the LED/display. */ + break; + } + break; + case INQUIRY: + IBM_DS(host_index).ldn_inquiry_access[ldn]++; + scb->command = IM_DEVICE_INQUIRY_CMD; + scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; + scb->u1.log_blk_adr = 0; + break; + case TEST_UNIT_READY: + scb->command = IM_OTHER_SCSI_CMD_CMD; + scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; + scb->u1.log_blk_adr = 0; + scb->u1.scsi_cmd_length = 6; + memcpy(scb->u2.scsi_command, cmd->cmnd, 6); + last_scsi_type(host_index)[ldn] = IM_LONG_SCB; + break; + case READ_CAPACITY: + /* the length of system memory buffer must be exactly 8 bytes */ + scb->command = IM_READ_CAPACITY_CMD; + scb->enable |= IM_READ_CONTROL | IM_BYPASS_BUFFER; + if (scb->sys_buf_length > 8) + scb->sys_buf_length = 8; + break; + /* Commands that need read-only-mode (system <- device): */ + case REQUEST_SENSE: + scb->command = IM_REQUEST_SENSE_CMD; + scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; + break; + /* Commands that need write-only-mode (system -> device): */ + case MODE_SELECT: + case MODE_SELECT_10: + IBM_DS(host_index).ldn_modeselect_access[ldn]++; + scb->command = IM_OTHER_SCSI_CMD_CMD; + scb->enable |= IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; /*Select needs WRITE-enabled */ + scb->u1.scsi_cmd_length = cmd->cmd_len; + memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); + last_scsi_type(host_index)[ldn] = IM_LONG_SCB; + break; + /* For other commands, read-only is useful. Most other commands are + running without an input-data-block. */ + default: + scb->command = IM_OTHER_SCSI_CMD_CMD; + scb->enable |= IM_READ_CONTROL | IM_SUPRESS_EXCEPTION_SHORT | IM_BYPASS_BUFFER; + scb->u1.scsi_cmd_length = cmd->cmd_len; + memcpy(scb->u2.scsi_command, cmd->cmnd, cmd->cmd_len); + last_scsi_type(host_index)[ldn] = IM_LONG_SCB; + break; + } + /*issue scb command, and return */ + if (++disk_rw_in_progress == 1) + PS2_DISK_LED_ON(shpnt->host_no, target); + + if (last_scsi_type(host_index)[ldn] == IM_LONG_SCB) { + issue_cmd(host_index, isa_virt_to_bus(scb), IM_LONG_SCB | ldn); + IBM_DS(host_index).long_scbs++; + } else { + issue_cmd(host_index, isa_virt_to_bus(scb), IM_SCB | ldn); + IBM_DS(host_index).scbs++; + } + return 0; +} + +static int ibmmca_abort(Scsi_Cmnd * cmd) +{ + /* Abort does not work, as the adapter never generates an interrupt on + * whatever situation is simulated, even when really pending commands + * are running on the adapters' hardware ! */ + + struct Scsi_Host *shpnt; + unsigned int ldn; + void (*saved_done) (Scsi_Cmnd *); + int target; + int host_index; + int max_pun; + unsigned long imm_command; + +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Abort subroutine called...\n"); +#endif + + shpnt = cmd->device->host; + /* search for the right hostadapter */ + for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++); + + if (!hosts[host_index]) { /* invalid hostadapter descriptor address */ + cmd->result = DID_NO_CONNECT << 16; + if (cmd->scsi_done) + (cmd->scsi_done) (cmd); + shpnt = cmd->device->host; +#ifdef IM_DEBUG_PROBE + printk(KERN_DEBUG "IBM MCA SCSI: Abort adapter selection failed!\n"); +#endif + return SUCCESS; + } + max_pun = subsystem_maxid(host_index); + if (ibm_ansi_order) { + target = max_pun - 1 - cmd->device->id; + if ((target <= subsystem_pun(host_index)) && (cmd->device->id <= subsystem_pun(host_index))) + target--; + else if ((target >= subsystem_pun(host_index)) && (cmd->device->id >= subsystem_pun(host_index))) + target++; + } else + target = cmd->device->id; + + /* get logical device number, and disable system interrupts */ + printk(KERN_WARNING "IBM MCA SCSI: Sending abort to device pun=%d, lun=%d.\n", target, cmd->device->lun); + ldn = get_ldn(host_index)[target][cmd->device->lun]; + + /*if cmd for this ldn has already finished, no need to abort */ + if (!ld(host_index)[ldn].cmd) { + return SUCCESS; + } + + /* Clear ld.cmd, save done function, install internal done, + * send abort immediate command (this enables sys. interrupts), + * and wait until the interrupt arrives. + */ + saved_done = cmd->scsi_done; + cmd->scsi_done = internal_done; + cmd->SCp.Status = 0; + last_scsi_command(host_index)[ldn] = IM_ABORT_IMM_CMD; + last_scsi_type(host_index)[ldn] = IM_IMM_CMD; + imm_command = inl(IM_CMD_REG(host_index)); + imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */ + imm_command |= (unsigned long) (IM_ABORT_IMM_CMD); + /* must wait for attention reg not busy */ + /* FIXME - timeout, politeness */ + while (1) { + if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) + break; + } + /* write registers and enable system interrupts */ + outl(imm_command, IM_CMD_REG(host_index)); + outb(IM_IMM_CMD | ldn, IM_ATTN_REG(host_index)); +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Abort queued to adapter...\n"); +#endif + spin_unlock_irq(shpnt->host_lock); + while (!cmd->SCp.Status) + yield(); + spin_lock_irq(shpnt->host_lock); + cmd->scsi_done = saved_done; +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Abort returned with adapter response...\n"); +#endif + + /*if abort went well, call saved done, then return success or error */ + if (cmd->result == (DID_ABORT << 16)) + { + cmd->result |= DID_ABORT << 16; + if (cmd->scsi_done) + (cmd->scsi_done) (cmd); + ld(host_index)[ldn].cmd = NULL; +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Abort finished with success.\n"); +#endif + return SUCCESS; + } else { + cmd->result |= DID_NO_CONNECT << 16; + if (cmd->scsi_done) + (cmd->scsi_done) (cmd); + ld(host_index)[ldn].cmd = NULL; +#ifdef IM_DEBUG_PROBE + printk("IBM MCA SCSI: Abort failed.\n"); +#endif + return FAILED; + } +} + +static int ibmmca_host_reset(Scsi_Cmnd * cmd) +{ + struct Scsi_Host *shpnt; + Scsi_Cmnd *cmd_aid; + int ticks, i; + int host_index; + unsigned long imm_command; + + if (cmd == NULL) + BUG(); + + ticks = IM_RESET_DELAY * HZ; + shpnt = cmd->device->host; + /* search for the right hostadapter */ + for (host_index = 0; hosts[host_index] && hosts[host_index]->host_no != shpnt->host_no; host_index++); + + if (!hosts[host_index]) /* invalid hostadapter descriptor address */ + return FAILED; + + if (local_checking_phase_flag(host_index)) { + printk(KERN_WARNING "IBM MCA SCSI: unable to reset while checking devices.\n"); + return FAILED; + } + + /* issue reset immediate command to subsystem, and wait for interrupt */ + printk("IBM MCA SCSI: resetting all devices.\n"); + reset_status(host_index) = IM_RESET_IN_PROGRESS; + last_scsi_command(host_index)[0xf] = IM_RESET_IMM_CMD; + last_scsi_type(host_index)[0xf] = IM_IMM_CMD; + imm_command = inl(IM_CMD_REG(host_index)); + imm_command &= (unsigned long) (0xffff0000); /* mask reserved stuff */ + imm_command |= (unsigned long) (IM_RESET_IMM_CMD); + /* must wait for attention reg not busy */ + while (1) { + if (!(inb(IM_STAT_REG(host_index)) & IM_BUSY)) + break; + spin_unlock_irq(shpnt->host_lock); + yield(); + spin_lock_irq(shpnt->host_lock); + } + /*write registers and enable system interrupts */ + outl(imm_command, IM_CMD_REG(host_index)); + outb(IM_IMM_CMD | 0xf, IM_ATTN_REG(host_index)); + /* wait for interrupt finished or intr_stat register to be set, as the + * interrupt will not be executed, while we are in here! */ + + /* FIXME: This is really really icky we so want a sleeping version of this ! */ + while (reset_status(host_index) == IM_RESET_IN_PROGRESS && --ticks && ((inb(IM_INTR_REG(host_index)) & 0x8f) != 0x8f)) { + udelay((1 + 999 / HZ) * 1000); + barrier(); + } + /* if reset did not complete, just return an error */ + if (!ticks) { + printk(KERN_ERR "IBM MCA SCSI: reset did not complete within %d seconds.\n", IM_RESET_DELAY); + reset_status(host_index) = IM_RESET_FINISHED_FAIL; + return FAILED; + } + + if ((inb(IM_INTR_REG(host_index)) & 0x8f) == 0x8f) { + /* analysis done by this routine and not by the intr-routine */ + if (inb(IM_INTR_REG(host_index)) == 0xaf) + reset_status(host_index) = IM_RESET_FINISHED_OK_NO_INT; + else if (inb(IM_INTR_REG(host_index)) == 0xcf) + reset_status(host_index) = IM_RESET_FINISHED_FAIL; + else /* failed, 4get it */ + reset_status(host_index) = IM_RESET_NOT_IN_PROGRESS_NO_INT; + outb(IM_EOI | 0xf, IM_ATTN_REG(host_index)); + } + + /* if reset failed, just return an error */ + if (reset_status(host_index) == IM_RESET_FINISHED_FAIL) { + printk(KERN_ERR "IBM MCA SCSI: reset failed.\n"); + return FAILED; + } + + /* so reset finished ok - call outstanding done's, and return success */ + printk(KERN_INFO "IBM MCA SCSI: Reset successfully completed.\n"); + for (i = 0; i < MAX_LOG_DEV; i++) { + cmd_aid = ld(host_index)[i].cmd; + if (cmd_aid && cmd_aid->scsi_done) { + ld(host_index)[i].cmd = NULL; + cmd_aid->result = DID_RESET << 16; + } + } + return SUCCESS; +} + +static int ibmmca_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int *info) +{ + int size = capacity; + info[0] = 64; + info[1] = 32; + info[2] = size / (info[0] * info[1]); + if (info[2] >= 1024) { + info[0] = 128; + info[1] = 63; + info[2] = size / (info[0] * info[1]); + if (info[2] >= 1024) { + info[0] = 255; + info[1] = 63; + info[2] = size / (info[0] * info[1]); + if (info[2] >= 1024) + info[2] = 1023; + } + } + return 0; +} + +/* calculate percentage of total accesses on a ldn */ +static int ldn_access_load(int host_index, int ldn) +{ + if (IBM_DS(host_index).total_accesses == 0) + return (0); + if (IBM_DS(host_index).ldn_access[ldn] == 0) + return (0); + return (IBM_DS(host_index).ldn_access[ldn] * 100) / IBM_DS(host_index).total_accesses; +} + +/* calculate total amount of r/w-accesses */ +static int ldn_access_total_read_write(int host_index) +{ + int a; + int i; + + a = 0; + for (i = 0; i <= MAX_LOG_DEV; i++) + a += IBM_DS(host_index).ldn_read_access[i] + IBM_DS(host_index).ldn_write_access[i]; + return (a); +} + +static int ldn_access_total_inquiry(int host_index) +{ + int a; + int i; + + a = 0; + for (i = 0; i <= MAX_LOG_DEV; i++) + a += IBM_DS(host_index).ldn_inquiry_access[i]; + return (a); +} + +static int ldn_access_total_modeselect(int host_index) +{ + int a; + int i; + + a = 0; + for (i = 0; i <= MAX_LOG_DEV; i++) + a += IBM_DS(host_index).ldn_modeselect_access[i]; + return (a); +} + +/* routine to display info in the proc-fs-structure (a deluxe feature) */ +static int ibmmca_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout) +{ + int len = 0; + int i, id, lun, host_index; + unsigned long flags; + int max_pun; + + for (i = 0; hosts[i] && hosts[i] != shpnt; i++); + + spin_lock_irqsave(hosts[i]->host_lock, flags); /* Check it */ + host_index = i; + if (!shpnt) { + len += sprintf(buffer + len, "\nIBM MCA SCSI: Can't find adapter for host number %d\n", + shpnt->host_no); + return len; + } + max_pun = subsystem_maxid(host_index); + + len += sprintf(buffer + len, "\n IBM-SCSI-Subsystem-Linux-Driver, Version %s\n\n\n", IBMMCA_SCSI_DRIVER_VERSION); + len += sprintf(buffer + len, " SCSI Access-Statistics:\n"); + len += sprintf(buffer + len, " Device Scanning Order....: %s\n", (ibm_ansi_order) ? "IBM/ANSI" : "New Industry Standard"); +#ifdef CONFIG_SCSI_MULTI_LUN + len += sprintf(buffer + len, " Multiple LUN probing.....: Yes\n"); +#else + len += sprintf(buffer + len, " Multiple LUN probing.....: No\n"); +#endif + len += sprintf(buffer + len, " This Hostnumber..........: %d\n", shpnt->host_no); + len += sprintf(buffer + len, " Base I/O-Port............: 0x%x\n", (unsigned int) (IM_CMD_REG(host_index))); + len += sprintf(buffer + len, " (Shared) IRQ.............: %d\n", IM_IRQ); + len += sprintf(buffer + len, " Total Interrupts.........: %d\n", IBM_DS(host_index).total_interrupts); + len += sprintf(buffer + len, " Total SCSI Accesses......: %d\n", IBM_DS(host_index).total_accesses); + len += sprintf(buffer + len, " Total short SCBs.........: %d\n", IBM_DS(host_index).scbs); + len += sprintf(buffer + len, " Total long SCBs..........: %d\n", IBM_DS(host_index).long_scbs); + len += sprintf(buffer + len, " Total SCSI READ/WRITE..: %d\n", ldn_access_total_read_write(host_index)); + len += sprintf(buffer + len, " Total SCSI Inquiries...: %d\n", ldn_access_total_inquiry(host_index)); + len += sprintf(buffer + len, " Total SCSI Modeselects.: %d\n", ldn_access_total_modeselect(host_index)); + len += sprintf(buffer + len, " Total SCSI other cmds..: %d\n", IBM_DS(host_index).total_accesses - ldn_access_total_read_write(host_index) + - ldn_access_total_modeselect(host_index) + - ldn_access_total_inquiry(host_index)); + len += sprintf(buffer + len, " Total SCSI command fails.: %d\n\n", IBM_DS(host_index).total_errors); + len += sprintf(buffer + len, " Logical-Device-Number (LDN) Access-Statistics:\n"); + len += sprintf(buffer + len, " LDN | Accesses [%%] | READ | WRITE | ASSIGNMENTS\n"); + len += sprintf(buffer + len, " -----|--------------|-----------|-----------|--------------\n"); + for (i = 0; i <= MAX_LOG_DEV; i++) + len += sprintf(buffer + len, " %2X | %3d | %8d | %8d | %8d\n", i, ldn_access_load(host_index, i), IBM_DS(host_index).ldn_read_access[i], IBM_DS(host_index).ldn_write_access[i], IBM_DS(host_index).ldn_assignments[i]); + len += sprintf(buffer + len, " -----------------------------------------------------------\n\n"); + len += sprintf(buffer + len, " Dynamical-LDN-Assignment-Statistics:\n"); + len += sprintf(buffer + len, " Number of physical SCSI-devices..: %d (+ Adapter)\n", IBM_DS(host_index).total_scsi_devices); + len += sprintf(buffer + len, " Dynamical Assignment necessary...: %s\n", IBM_DS(host_index).dyn_flag ? "Yes" : "No "); + len += sprintf(buffer + len, " Next LDN to be assigned..........: 0x%x\n", next_ldn(host_index)); + len += sprintf(buffer + len, " Dynamical assignments done yet...: %d\n", IBM_DS(host_index).dynamical_assignments); + len += sprintf(buffer + len, "\n Current SCSI-Device-Mapping:\n"); + len += sprintf(buffer + len, " Physical SCSI-Device Map Logical SCSI-Device Map\n"); + len += sprintf(buffer + len, " ID\\LUN 0 1 2 3 4 5 6 7 ID\\LUN 0 1 2 3 4 5 6 7\n"); + for (id = 0; id < max_pun; id++) { + len += sprintf(buffer + len, " %2d ", id); + for (lun = 0; lun < 8; lun++) + len += sprintf(buffer + len, "%2s ", ti_p(get_scsi(host_index)[id][lun])); + len += sprintf(buffer + len, " %2d ", id); + for (lun = 0; lun < 8; lun++) + len += sprintf(buffer + len, "%2s ", ti_l(get_ldn(host_index)[id][lun])); + len += sprintf(buffer + len, "\n"); + } + + len += sprintf(buffer + len, "(A = IBM-Subsystem, D = Harddisk, T = Tapedrive, P = Processor, W = WORM,\n"); + len += sprintf(buffer + len, " R = CD-ROM, S = Scanner, M = MO-Drive, C = Medium-Changer, + = unprovided LUN,\n"); + len += sprintf(buffer + len, " - = nothing found, nothing assigned or unprobed LUN)\n\n"); + + *start = buffer + offset; + len -= offset; + if (len > length) + len = length; + spin_unlock_irqrestore(shpnt->host_lock, flags); + return len; +} + +static int option_setup(char *str) +{ + int ints[IM_MAX_HOSTS]; + char *cur = str; + int i = 1; + + while (cur && isdigit(*cur) && i <= IM_MAX_HOSTS) { + ints[i++] = simple_strtoul(cur, NULL, 0); + if ((cur = strchr(cur, ',')) != NULL) + cur++; + } + ints[0] = i - 1; + internal_ibmmca_scsi_setup(cur, ints); + return 0; +} + +__setup("ibmmcascsi=", option_setup); + +static Scsi_Host_Template driver_template = { + .proc_name = "ibmmca", + .proc_info = ibmmca_proc_info, + .name = "IBM SCSI-Subsystem", + .detect = ibmmca_detect, + .release = ibmmca_release, + .queuecommand = ibmmca_queuecommand, + .eh_abort_handler = ibmmca_abort, + .eh_host_reset_handler = ibmmca_host_reset, + .bios_param = ibmmca_biosparam, + .can_queue = 16, + .this_id = 7, + .sg_tablesize = 16, + .cmd_per_lun = 1, + .use_clustering = ENABLE_CLUSTERING, +}; +#include "scsi_module.c" |