mirror of https://gitee.com/openkylin/linux.git
2509 lines
95 KiB
C
2509 lines
95 KiB
C
/*
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Low Level Linux Driver for the IBM Microchannel SCSI Subsystem for
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Linux Kernel >= 2.4.0.
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Copyright (c) 1995 Strom Systems, Inc. under the terms of the GNU
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General Public License. Written by Martin Kolinek, December 1995.
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Further development by: Chris Beauregard, Klaus Kudielka, Michael Lang
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See the file Documentation/scsi/ibmmca.txt for a detailed description
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of this driver, the commandline arguments and the history of its
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development.
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See the WWW-page: http://www.uni-mainz.de/~langm000/linux.html for latest
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updates, info and ADF-files for adapters supported by this driver.
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Alan Cox <alan@redhat.com>
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Updated for Linux 2.5.45 to use the new error handler, cleaned up the
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lock macros and did a few unavoidable locking tweaks, plus one locking
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fix in the irq and completion path.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/ctype.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/blkdev.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <linux/mca.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <linux/mca-legacy.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include "ibmmca.h"
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/* current version of this driver-source: */
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#define IBMMCA_SCSI_DRIVER_VERSION "4.0b-ac"
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/* driver configuration */
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#define IM_MAX_HOSTS 8 /* maximum number of host adapters */
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#define IM_RESET_DELAY 60 /* seconds allowed for a reset */
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/* driver debugging - #undef all for normal operation */
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/* if defined: count interrupts and ignore this special one: */
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#undef IM_DEBUG_TIMEOUT //50
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#define TIMEOUT_PUN 0
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#define TIMEOUT_LUN 0
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/* verbose interrupt: */
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#undef IM_DEBUG_INT
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/* verbose queuecommand: */
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#undef IM_DEBUG_CMD
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/* verbose queucommand for specific SCSI-device type: */
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#undef IM_DEBUG_CMD_SPEC_DEV
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/* verbose device probing */
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#undef IM_DEBUG_PROBE
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/* device type that shall be displayed on syslog (only during debugging): */
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#define IM_DEBUG_CMD_DEVICE TYPE_TAPE
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/* relative addresses of hardware registers on a subsystem */
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#define IM_CMD_REG(hi) (hosts[(hi)]->io_port) /*Command Interface, (4 bytes long) */
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#define IM_ATTN_REG(hi) (hosts[(hi)]->io_port+4) /*Attention (1 byte) */
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#define IM_CTR_REG(hi) (hosts[(hi)]->io_port+5) /*Basic Control (1 byte) */
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#define IM_INTR_REG(hi) (hosts[(hi)]->io_port+6) /*Interrupt Status (1 byte, r/o) */
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#define IM_STAT_REG(hi) (hosts[(hi)]->io_port+7) /*Basic Status (1 byte, read only) */
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/* basic I/O-port of first adapter */
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#define IM_IO_PORT 0x3540
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/* maximum number of hosts that can be found */
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#define IM_N_IO_PORT 8
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/*requests going into the upper nibble of the Attention register */
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/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
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#define IM_IMM_CMD 0x10 /*immediate command */
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#define IM_SCB 0x30 /*Subsystem Control Block command */
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#define IM_LONG_SCB 0x40 /*long Subsystem Control Block command */
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#define IM_EOI 0xe0 /*end-of-interrupt request */
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/*values for bits 7,1,0 of Basic Control reg. (bits 6-2 reserved) */
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#define IM_HW_RESET 0x80 /*hardware reset */
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#define IM_ENABLE_DMA 0x02 /*enable subsystem's busmaster DMA */
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#define IM_ENABLE_INTR 0x01 /*enable interrupts to the system */
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/*to interpret the upper nibble of Interrupt Status register */
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/*note: the lower nibble specifies the device(0-14), or subsystem(15) */
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#define IM_SCB_CMD_COMPLETED 0x10
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#define IM_SCB_CMD_COMPLETED_WITH_RETRIES 0x50
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#define IM_LOOP_SCATTER_BUFFER_FULL 0x60
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#define IM_ADAPTER_HW_FAILURE 0x70
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#define IM_IMMEDIATE_CMD_COMPLETED 0xa0
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#define IM_CMD_COMPLETED_WITH_FAILURE 0xc0
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#define IM_CMD_ERROR 0xe0
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#define IM_SOFTWARE_SEQUENCING_ERROR 0xf0
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/*to interpret bits 3-0 of Basic Status register (bits 7-4 reserved) */
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#define IM_CMD_REG_FULL 0x08
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#define IM_CMD_REG_EMPTY 0x04
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#define IM_INTR_REQUEST 0x02
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#define IM_BUSY 0x01
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/*immediate commands (word written into low 2 bytes of command reg) */
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#define IM_RESET_IMM_CMD 0x0400
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#define IM_FEATURE_CTR_IMM_CMD 0x040c
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#define IM_DMA_PACING_IMM_CMD 0x040d
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#define IM_ASSIGN_IMM_CMD 0x040e
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#define IM_ABORT_IMM_CMD 0x040f
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#define IM_FORMAT_PREP_IMM_CMD 0x0417
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/*SCB (Subsystem Control Block) structure */
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struct im_scb {
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unsigned short command; /*command word (read, etc.) */
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unsigned short enable; /*enable word, modifies cmd */
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union {
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unsigned long log_blk_adr; /*block address on SCSI device */
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unsigned char scsi_cmd_length; /*6,10,12, for other scsi cmd */
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} u1;
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unsigned long sys_buf_adr; /*physical system memory adr */
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unsigned long sys_buf_length; /*size of sys mem buffer */
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unsigned long tsb_adr; /*Termination Status Block adr */
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unsigned long scb_chain_adr; /*optional SCB chain address */
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union {
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struct {
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unsigned short count; /*block count, on SCSI device */
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unsigned short length; /*block length, on SCSI device */
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} blk;
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unsigned char scsi_command[12]; /*other scsi command */
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} u2;
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};
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/*structure scatter-gather element (for list of system memory areas) */
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struct im_sge {
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void *address;
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unsigned long byte_length;
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};
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/*structure returned by a get_pos_info command: */
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struct im_pos_info {
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unsigned short pos_id; /* adapter id */
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unsigned char pos_3a; /* pos 3 (if pos 6 = 0) */
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unsigned char pos_2; /* pos 2 */
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unsigned char int_level; /* interrupt level IRQ 11 or 14 */
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unsigned char pos_4a; /* pos 4 (if pos 6 = 0) */
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unsigned short connector_size; /* MCA connector size: 16 or 32 Bit */
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unsigned char num_luns; /* number of supported luns per device */
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unsigned char num_puns; /* number of supported puns */
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unsigned char pacing_factor; /* pacing factor */
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unsigned char num_ldns; /* number of ldns available */
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unsigned char eoi_off; /* time EOI and interrupt inactive */
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unsigned char max_busy; /* time between reset and busy on */
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unsigned short cache_stat; /* ldn cachestat. Bit=1 = not cached */
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unsigned short retry_stat; /* retry status of ldns. Bit=1=disabled */
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unsigned char pos_4b; /* pos 4 (if pos 6 = 1) */
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unsigned char pos_3b; /* pos 3 (if pos 6 = 1) */
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unsigned char pos_6; /* pos 6 */
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unsigned char pos_5; /* pos 5 */
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unsigned short max_overlap; /* maximum overlapping requests */
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unsigned short num_bus; /* number of SCSI-busses */
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};
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/*values for SCB command word */
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#define IM_NO_SYNCHRONOUS 0x0040 /*flag for any command */
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#define IM_NO_DISCONNECT 0x0080 /*flag for any command */
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#define IM_READ_DATA_CMD 0x1c01
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#define IM_WRITE_DATA_CMD 0x1c02
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#define IM_READ_VERIFY_CMD 0x1c03
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#define IM_WRITE_VERIFY_CMD 0x1c04
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#define IM_REQUEST_SENSE_CMD 0x1c08
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#define IM_READ_CAPACITY_CMD 0x1c09
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#define IM_DEVICE_INQUIRY_CMD 0x1c0b
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#define IM_READ_LOGICAL_CMD 0x1c2a
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#define IM_OTHER_SCSI_CMD_CMD 0x241f
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/* unused, but supported, SCB commands */
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#define IM_GET_COMMAND_COMPLETE_STATUS_CMD 0x1c07 /* command status */
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#define IM_GET_POS_INFO_CMD 0x1c0a /* returns neat stuff */
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#define IM_READ_PREFETCH_CMD 0x1c31 /* caching controller only */
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#define IM_FOMAT_UNIT_CMD 0x1c16 /* format unit */
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#define IM_REASSIGN_BLOCK_CMD 0x1c18 /* in case of error */
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/*values to set bits in the enable word of SCB */
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#define IM_READ_CONTROL 0x8000
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#define IM_REPORT_TSB_ONLY_ON_ERROR 0x4000
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#define IM_RETRY_ENABLE 0x2000
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#define IM_POINTER_TO_LIST 0x1000
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#define IM_SUPRESS_EXCEPTION_SHORT 0x0400
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#define IM_BYPASS_BUFFER 0x0200
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#define IM_CHAIN_ON_NO_ERROR 0x0001
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/*TSB (Termination Status Block) structure */
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struct im_tsb {
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unsigned short end_status;
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unsigned short reserved1;
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unsigned long residual_byte_count;
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unsigned long sg_list_element_adr;
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unsigned short status_length;
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unsigned char dev_status;
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unsigned char cmd_status;
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unsigned char dev_error;
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unsigned char cmd_error;
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unsigned short reserved2;
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unsigned short reserved3;
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unsigned short low_of_last_scb_adr;
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unsigned short high_of_last_scb_adr;
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};
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/*subsystem uses interrupt request level 14 */
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#define IM_IRQ 14
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/*SCSI-2 F/W may evade to interrupt 11 */
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#define IM_IRQ_FW 11
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/* Model 95 has an additional alphanumeric display, which can be used
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to display SCSI-activities. 8595 models do not have any disk led, which
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makes this feature quite useful.
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The regular PS/2 disk led is turned on/off by bits 6,7 of system
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control port. */
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/* LED display-port (actually, last LED on display) */
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#define MOD95_LED_PORT 0x108
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/* system-control-register of PS/2s with diskindicator */
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#define PS2_SYS_CTR 0x92
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/* activity displaying methods */
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#define LED_DISP 1
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#define LED_ADISP 2
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#define LED_ACTIVITY 4
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/* failed intr */
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#define CMD_FAIL 255
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/* The SCSI-ID(!) of the accessed SCSI-device is shown on PS/2-95 machines' LED
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displays. ldn is no longer displayed here, because the ldn mapping is now
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done dynamically and the ldn <-> pun,lun maps can be looked-up at boottime
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or during uptime in /proc/scsi/ibmmca/<host_no> in case of trouble,
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interest, debugging or just for having fun. The left number gives the
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host-adapter number and the right shows the accessed SCSI-ID. */
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/* display_mode is set by the ibmmcascsi= command line arg */
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static int display_mode = 0;
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/* set default adapter timeout */
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static unsigned int adapter_timeout = 45;
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/* for probing on feature-command: */
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static unsigned int global_command_error_excuse = 0;
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/* global setting by command line for adapter_speed */
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static int global_adapter_speed = 0; /* full speed by default */
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/* Panel / LED on, do it right for F/W addressin, too. adisplay will
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* just ignore ids>7, as the panel has only 7 digits available */
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#define PS2_DISK_LED_ON(ad,id) { if (display_mode & LED_DISP) { if (id>9) \
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outw((ad+48)|((id+55)<<8), MOD95_LED_PORT ); else \
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outw((ad+48)|((id+48)<<8), MOD95_LED_PORT ); } else \
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if (display_mode & LED_ADISP) { if (id<7) outb((char)(id+48),MOD95_LED_PORT+1+id); \
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outb((char)(ad+48), MOD95_LED_PORT); } \
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if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
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outb(inb(PS2_SYS_CTR) | 0xc0, PS2_SYS_CTR); }
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/* Panel / LED off */
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/* bug fixed, Dec 15, 1997, where | was replaced by & here */
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#define PS2_DISK_LED_OFF() { if (display_mode & LED_DISP) \
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outw(0x2020, MOD95_LED_PORT ); else if (display_mode & LED_ADISP) { \
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outl(0x20202020,MOD95_LED_PORT); outl(0x20202020,MOD95_LED_PORT+4); } \
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if ((display_mode & LED_ACTIVITY)||(!display_mode)) \
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outb(inb(PS2_SYS_CTR) & 0x3f, PS2_SYS_CTR); }
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/*list of supported subsystems */
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struct subsys_list_struct {
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unsigned short mca_id;
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char *description;
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};
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/* types of different supported hardware that goes to hostdata special */
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#define IBM_SCSI2_FW 0
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#define IBM_7568_WCACHE 1
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#define IBM_EXP_UNIT 2
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#define IBM_SCSI_WCACHE 3
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#define IBM_SCSI 4
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/* other special flags for hostdata structure */
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#define FORCED_DETECTION 100
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#define INTEGRATED_SCSI 101
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/* List of possible IBM-SCSI-adapters */
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static struct subsys_list_struct subsys_list[] = {
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{0x8efc, "IBM SCSI-2 F/W Adapter"}, /* special = 0 */
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{0x8efd, "IBM 7568 Industrial Computer SCSI Adapter w/Cache"}, /* special = 1 */
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{0x8ef8, "IBM Expansion Unit SCSI Controller"}, /* special = 2 */
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{0x8eff, "IBM SCSI Adapter w/Cache"}, /* special = 3 */
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{0x8efe, "IBM SCSI Adapter"}, /* special = 4 */
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};
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/* Max number of logical devices (can be up from 0 to 14). 15 is the address
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of the adapter itself. */
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#define MAX_LOG_DEV 15
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/*local data for a logical device */
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struct logical_device {
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struct im_scb scb; /* SCSI-subsystem-control-block structure */
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struct im_tsb tsb; /* SCSI command complete status block structure */
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struct im_sge sge[16]; /* scatter gather list structure */
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unsigned char buf[256]; /* SCSI command return data buffer */
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Scsi_Cmnd *cmd; /* SCSI-command that is currently in progress */
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int device_type; /* type of the SCSI-device. See include/scsi/scsi.h
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for interpretation of the possible values */
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int block_length; /* blocksize of a particular logical SCSI-device */
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int cache_flag; /* 1 if this is uncached, 0 if cache is present for ldn */
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int retry_flag; /* 1 if adapter retry is disabled, 0 if enabled */
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};
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/* statistics of the driver during operations (for proc_info) */
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struct Driver_Statistics {
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/* SCSI statistics on the adapter */
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int ldn_access[MAX_LOG_DEV + 1]; /* total accesses on a ldn */
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int ldn_read_access[MAX_LOG_DEV + 1]; /* total read-access on a ldn */
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int ldn_write_access[MAX_LOG_DEV + 1]; /* total write-access on a ldn */
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int ldn_inquiry_access[MAX_LOG_DEV + 1]; /* total inquiries on a ldn */
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int ldn_modeselect_access[MAX_LOG_DEV + 1]; /* total mode selects on ldn */
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int scbs; /* short SCBs queued */
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int long_scbs; /* long SCBs queued */
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int total_accesses; /* total accesses on all ldns */
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int total_interrupts; /* total interrupts (should be
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same as total_accesses) */
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int total_errors; /* command completed with error */
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/* dynamical assignment statistics */
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int total_scsi_devices; /* number of physical pun,lun */
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int dyn_flag; /* flag showing dynamical mode */
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int dynamical_assignments; /* number of remappings of ldns */
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int ldn_assignments[MAX_LOG_DEV + 1]; /* number of remappings of each
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ldn */
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};
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/* data structure for each host adapter */
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struct ibmmca_hostdata {
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/* array of logical devices: */
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struct logical_device _ld[MAX_LOG_DEV + 1];
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/* array to convert (pun, lun) into logical device number: */
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unsigned char _get_ldn[16][8];
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/*array that contains the information about the physical SCSI-devices
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attached to this host adapter: */
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unsigned char _get_scsi[16][8];
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/* used only when checking logical devices: */
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int _local_checking_phase_flag;
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/* report received interrupt: */
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int _got_interrupt;
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/* report termination-status of SCSI-command: */
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int _stat_result;
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/* reset status (used only when doing reset): */
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int _reset_status;
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/* code of the last SCSI command (needed for panic info): */
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int _last_scsi_command[MAX_LOG_DEV + 1];
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/* identifier of the last SCSI-command type */
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int _last_scsi_type[MAX_LOG_DEV + 1];
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/* last blockcount */
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int _last_scsi_blockcount[MAX_LOG_DEV + 1];
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/* last locgical block address */
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unsigned long _last_scsi_logical_block[MAX_LOG_DEV + 1];
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/* Counter that points on the next reassignable ldn for dynamical
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remapping. The default value is 7, that is the first reassignable
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number in the list at boottime: */
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int _next_ldn;
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/* Statistics-structure for this IBM-SCSI-host: */
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struct Driver_Statistics _IBM_DS;
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/* This hostadapters pos-registers pos2 until pos6 */
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unsigned int _pos[8];
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/* assign a special variable, that contains dedicated info about the
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adaptertype */
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int _special;
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/* connector size on the MCA bus */
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int _connector_size;
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/* synchronous SCSI transfer rate bitpattern */
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int _adapter_speed;
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};
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/* macros to access host data structure */
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#define subsystem_pun(hi) (hosts[(hi)]->this_id)
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#define subsystem_maxid(hi) (hosts[(hi)]->max_id)
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#define ld(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_ld)
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#define get_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_ldn)
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#define get_scsi(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_get_scsi)
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#define local_checking_phase_flag(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_local_checking_phase_flag)
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#define got_interrupt(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_got_interrupt)
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#define stat_result(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_stat_result)
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#define reset_status(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_reset_status)
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#define last_scsi_command(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_command)
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#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
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#define last_scsi_blockcount(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_blockcount)
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#define last_scsi_logical_block(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_logical_block)
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#define last_scsi_type(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_last_scsi_type)
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#define next_ldn(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_next_ldn)
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#define IBM_DS(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_IBM_DS)
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#define special(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_special)
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#define subsystem_connector_size(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_connector_size)
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#define adapter_speed(hi) (((struct ibmmca_hostdata *) hosts[(hi)]->hostdata)->_adapter_speed)
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#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
|
|
|
|
MODULE_LICENSE("GPL");
|
|
#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(struct 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 successful, 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 successful, 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 successful, 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 successful, 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 < ARRAY_SIZE(subsys_list))) {
|
|
/* 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(struct scsi_host_template * scsi_template)
|
|
{
|
|
struct Scsi_Host *shpnt;
|
|
int port, id, i, j, k, 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, IRQF_SHARED, "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. */
|
|
for (i = 0; i < ARRAY_SIZE(subsys_list); 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, IRQF_SHARED, "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. */
|
|
for (i = 0; i < ARRAY_SIZE(subsys_list); 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, IRQF_SHARED, "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(struct 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 */
|
|
scmd_printk(KERN_WARNING, cmd,
|
|
"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.\n");
|
|
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_abort(Scsi_Cmnd * cmd)
|
|
{
|
|
struct Scsi_Host *shpnt = cmd->device->host;
|
|
int rc;
|
|
|
|
spin_lock_irq(shpnt->host_lock);
|
|
rc = __ibmmca_abort(cmd);
|
|
spin_unlock_irq(shpnt->host_lock);
|
|
|
|
return rc;
|
|
}
|
|
|
|
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;
|
|
|
|
BUG_ON(cmd == NULL);
|
|
|
|
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_host_reset(Scsi_Cmnd * cmd)
|
|
{
|
|
struct Scsi_Host *shpnt = cmd->device->host;
|
|
int rc;
|
|
|
|
spin_lock_irq(shpnt->host_lock);
|
|
rc = __ibmmca_host_reset(cmd);
|
|
spin_unlock_irq(shpnt->host_lock);
|
|
|
|
return rc;
|
|
}
|
|
|
|
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");
|
|
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 1;
|
|
}
|
|
|
|
__setup("ibmmcascsi=", option_setup);
|
|
|
|
static struct 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"
|