1397 строки
41 KiB
C
1397 строки
41 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Horst Hummel <Horst.Hummel@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* Copyright IBM Corp. 1999, 2009
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*/
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#ifndef DASD_INT_H
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#define DASD_INT_H
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/* we keep old device allocation scheme; IOW, minors are still in 0..255 */
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#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
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#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
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/*
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* States a dasd device can have:
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* new: the dasd_device structure is allocated.
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* known: the discipline for the device is identified.
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* basic: the device can do basic i/o.
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* unfmt: the device could not be analyzed (format is unknown).
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* ready: partition detection is done and the device is can do block io.
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* online: the device accepts requests from the block device queue.
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*
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* Things to do for startup state transitions:
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* new -> known: find discipline for the device and create devfs entries.
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* known -> basic: request irq line for the device.
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* basic -> ready: do the initial analysis, e.g. format detection,
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* do block device setup and detect partitions.
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* ready -> online: schedule the device tasklet.
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* Things to do for shutdown state transitions:
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* online -> ready: just set the new device state.
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* ready -> basic: flush requests from the block device layer, clear
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* partition information and reset format information.
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* basic -> known: terminate all requests and free irq.
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* known -> new: remove devfs entries and forget discipline.
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*/
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#define DASD_STATE_NEW 0
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#define DASD_STATE_KNOWN 1
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#define DASD_STATE_BASIC 2
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#define DASD_STATE_UNFMT 3
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#define DASD_STATE_READY 4
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#define DASD_STATE_ONLINE 5
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#include <linux/module.h>
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#include <linux/wait.h>
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#include <linux/blkdev.h>
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#include <linux/genhd.h>
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#include <linux/hdreg.h>
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#include <linux/interrupt.h>
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#include <linux/log2.h>
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#include <asm/ccwdev.h>
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#include <linux/workqueue.h>
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#include <asm/debug.h>
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#include <asm/dasd.h>
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#include <asm/idals.h>
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#include <linux/bitops.h>
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#include <linux/blk-mq.h>
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/* DASD discipline magic */
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#define DASD_ECKD_MAGIC 0xC5C3D2C4
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#define DASD_DIAG_MAGIC 0xC4C9C1C7
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#define DASD_FBA_MAGIC 0xC6C2C140
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/*
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* SECTION: Type definitions
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*/
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struct dasd_device;
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struct dasd_block;
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/* BIT DEFINITIONS FOR SENSE DATA */
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#define DASD_SENSE_BIT_0 0x80
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#define DASD_SENSE_BIT_1 0x40
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#define DASD_SENSE_BIT_2 0x20
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#define DASD_SENSE_BIT_3 0x10
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/* BIT DEFINITIONS FOR SIM SENSE */
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#define DASD_SIM_SENSE 0x0F
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#define DASD_SIM_MSG_TO_OP 0x03
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#define DASD_SIM_LOG 0x0C
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/* lock class for nested cdev lock */
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#define CDEV_NESTED_FIRST 1
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#define CDEV_NESTED_SECOND 2
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/*
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* SECTION: MACROs for klogd and s390 debug feature (dbf)
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*/
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#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
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do { \
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debug_sprintf_event(d_device->debug_area, \
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d_level, \
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d_str "\n", \
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d_data); \
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} while(0)
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#define DBF_EVENT(d_level, d_str, d_data...)\
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do { \
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debug_sprintf_event(dasd_debug_area, \
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d_level,\
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d_str "\n", \
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d_data); \
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} while(0)
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#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
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do { \
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struct ccw_dev_id __dev_id; \
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ccw_device_get_id(d_cdev, &__dev_id); \
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debug_sprintf_event(dasd_debug_area, \
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d_level, \
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"0.%x.%04x " d_str "\n", \
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__dev_id.ssid, __dev_id.devno, d_data); \
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} while (0)
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/* limit size for an errorstring */
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#define ERRORLENGTH 30
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/* definition of dbf debug levels */
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#define DBF_EMERG 0 /* system is unusable */
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#define DBF_ALERT 1 /* action must be taken immediately */
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#define DBF_CRIT 2 /* critical conditions */
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#define DBF_ERR 3 /* error conditions */
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#define DBF_WARNING 4 /* warning conditions */
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#define DBF_NOTICE 5 /* normal but significant condition */
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#define DBF_INFO 6 /* informational */
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#define DBF_DEBUG 6 /* debug-level messages */
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/* messages to be written via klogd and dbf */
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#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
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do { \
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printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
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dev_name(&d_device->cdev->dev), d_args); \
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DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
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} while(0)
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#define MESSAGE(d_loglevel,d_string,d_args...)\
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do { \
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printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
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DBF_EVENT(DBF_ALERT, d_string, d_args); \
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} while(0)
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/* messages to be written via klogd only */
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#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
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do { \
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printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
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dev_name(&d_device->cdev->dev), d_args); \
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} while(0)
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#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
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do { \
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printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
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} while(0)
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/* Macro to calculate number of blocks per page */
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#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
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struct dasd_ccw_req {
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unsigned int magic; /* Eye catcher */
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int intrc; /* internal error, e.g. from start_IO */
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struct list_head devlist; /* for dasd_device request queue */
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struct list_head blocklist; /* for dasd_block request queue */
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struct dasd_block *block; /* the originating block device */
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struct dasd_device *memdev; /* the device used to allocate this */
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struct dasd_device *startdev; /* device the request is started on */
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struct dasd_device *basedev; /* base device if no block->base */
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void *cpaddr; /* address of ccw or tcw */
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short retries; /* A retry counter */
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unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
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char status; /* status of this request */
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char lpm; /* logical path mask */
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unsigned long flags; /* flags of this request */
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struct dasd_queue *dq;
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unsigned long starttime; /* jiffies time of request start */
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unsigned long expires; /* expiration period in jiffies */
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void *data; /* pointer to data area */
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struct irb irb; /* device status in case of an error */
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struct dasd_ccw_req *refers; /* ERP-chain queueing. */
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void *function; /* originating ERP action */
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void *mem_chunk;
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unsigned long buildclk; /* TOD-clock of request generation */
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unsigned long startclk; /* TOD-clock of request start */
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unsigned long stopclk; /* TOD-clock of request interrupt */
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unsigned long endclk; /* TOD-clock of request termination */
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void (*callback)(struct dasd_ccw_req *, void *data);
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void *callback_data;
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unsigned int proc_bytes; /* bytes for partial completion */
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};
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/*
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* dasd_ccw_req -> status can be:
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*/
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#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
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#define DASD_CQR_DONE 0x01 /* request is completed successfully */
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#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
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#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
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#define DASD_CQR_FAILED 0x04 /* request is finally failed */
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#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
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#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
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#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
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#define DASD_CQR_ERROR 0x82 /* request is completed with error */
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#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
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#define DASD_CQR_CLEARED 0x84 /* request was cleared */
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#define DASD_CQR_SUCCESS 0x85 /* request was successful */
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/* default expiration time*/
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#define DASD_EXPIRES 300
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#define DASD_EXPIRES_MAX 40000000
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#define DASD_RETRIES 256
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#define DASD_RETRIES_MAX 32768
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/* per dasd_ccw_req flags */
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#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
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#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
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#define DASD_CQR_VERIFY_PATH 2 /* path verification request */
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#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
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* stolen. Should not be combined with
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* DASD_CQR_FLAGS_USE_ERP
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*/
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/*
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* The following flags are used to suppress output of certain errors.
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*/
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#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */
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#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/
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#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */
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#define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */
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#define DASD_REQ_PER_DEV 4
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/* Signature for error recovery functions. */
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typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
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/*
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* A single CQR can only contain a maximum of 255 CCWs. It is limited by
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* the locate record and locate record extended count value which can only hold
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* 1 Byte max.
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*/
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#define DASD_CQR_MAX_CCW 255
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/*
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* Unique identifier for dasd device.
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*/
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#define UA_NOT_CONFIGURED 0x00
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#define UA_BASE_DEVICE 0x01
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#define UA_BASE_PAV_ALIAS 0x02
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#define UA_HYPER_PAV_ALIAS 0x03
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struct dasd_uid {
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__u8 type;
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char vendor[4];
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char serial[15];
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__u16 ssid;
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__u8 real_unit_addr;
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__u8 base_unit_addr;
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char vduit[33];
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};
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/*
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* the struct dasd_discipline is
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* sth like a table of virtual functions, if you think of dasd_eckd
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* inheriting dasd...
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* no, currently we are not planning to reimplement the driver in C++
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*/
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struct dasd_discipline {
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struct module *owner;
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char ebcname[8]; /* a name used for tagging and printks */
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char name[8]; /* a name used for tagging and printks */
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struct list_head list; /* used for list of disciplines */
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/*
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* Device recognition functions. check_device is used to verify
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* the sense data and the information returned by read device
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* characteristics. It returns 0 if the discipline can be used
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* for the device in question. uncheck_device is called during
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* device shutdown to deregister a device from its discipline.
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*/
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int (*check_device) (struct dasd_device *);
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void (*uncheck_device) (struct dasd_device *);
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/*
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* do_analysis is used in the step from device state "basic" to
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* state "accept". It returns 0 if the device can be made ready,
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* it returns -EMEDIUMTYPE if the device can't be made ready or
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* -EAGAIN if do_analysis started a ccw that needs to complete
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* before the analysis may be repeated.
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*/
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int (*do_analysis) (struct dasd_block *);
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/*
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* This function is called, when new paths become available.
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* Disciplins may use this callback to do necessary setup work,
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* e.g. verify that new path is compatible with the current
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* configuration.
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*/
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int (*verify_path)(struct dasd_device *, __u8);
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int (*pe_handler)(struct dasd_device *, __u8, __u8);
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/*
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* Last things to do when a device is set online, and first things
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* when it is set offline.
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*/
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int (*basic_to_ready) (struct dasd_device *);
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int (*online_to_ready) (struct dasd_device *);
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int (*basic_to_known)(struct dasd_device *);
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/*
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* Initialize block layer request queue.
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*/
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void (*setup_blk_queue)(struct dasd_block *);
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/* (struct dasd_device *);
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* Device operation functions. build_cp creates a ccw chain for
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* a block device request, start_io starts the request and
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* term_IO cancels it (e.g. in case of a timeout). format_device
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* formats the device and check_device_format compares the format of
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* a device with the expected format_data.
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* handle_terminated_request allows to examine a cqr and prepare
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* it for retry.
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*/
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struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
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struct dasd_block *,
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struct request *);
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int (*start_IO) (struct dasd_ccw_req *);
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int (*term_IO) (struct dasd_ccw_req *);
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void (*handle_terminated_request) (struct dasd_ccw_req *);
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int (*format_device) (struct dasd_device *,
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struct format_data_t *, int);
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int (*check_device_format)(struct dasd_device *,
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struct format_check_t *, int);
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int (*free_cp) (struct dasd_ccw_req *, struct request *);
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/*
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* Error recovery functions. examine_error() returns a value that
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* indicates what to do for an error condition. If examine_error()
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* returns 'dasd_era_recover' erp_action() is called to create a
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* special error recovery ccw. erp_postaction() is called after
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* an error recovery ccw has finished its execution. dump_sense
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* is called for every error condition to print the sense data
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* to the console.
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*/
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dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
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dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
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void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
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struct irb *);
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void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
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void (*check_for_device_change) (struct dasd_device *,
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struct dasd_ccw_req *,
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struct irb *);
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/* i/o control functions. */
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int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
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int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
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int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
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/* reload device after state change */
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int (*reload) (struct dasd_device *);
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int (*get_uid) (struct dasd_device *, struct dasd_uid *);
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void (*kick_validate) (struct dasd_device *);
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int (*check_attention)(struct dasd_device *, __u8);
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int (*host_access_count)(struct dasd_device *);
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int (*hosts_print)(struct dasd_device *, struct seq_file *);
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void (*handle_hpf_error)(struct dasd_device *, struct irb *);
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void (*disable_hpf)(struct dasd_device *);
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int (*hpf_enabled)(struct dasd_device *);
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void (*reset_path)(struct dasd_device *, __u8);
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/*
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* Extent Space Efficient (ESE) relevant functions
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*/
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int (*is_ese)(struct dasd_device *);
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/* Capacity */
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int (*space_allocated)(struct dasd_device *);
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int (*space_configured)(struct dasd_device *);
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int (*logical_capacity)(struct dasd_device *);
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int (*release_space)(struct dasd_device *, struct format_data_t *);
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/* Extent Pool */
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int (*ext_pool_id)(struct dasd_device *);
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int (*ext_size)(struct dasd_device *);
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int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
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int (*ext_pool_warn_thrshld)(struct dasd_device *);
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int (*ext_pool_oos)(struct dasd_device *);
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int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
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struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
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struct dasd_ccw_req *, struct irb *);
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int (*ese_read)(struct dasd_ccw_req *, struct irb *);
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};
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extern struct dasd_discipline *dasd_diag_discipline_pointer;
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/*
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* Notification numbers for extended error reporting notifications:
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* The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
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* eer pointer) is freed. The error reporting module needs to do all necessary
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* cleanup steps.
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* The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
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*/
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#define DASD_EER_DISABLE 0
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#define DASD_EER_TRIGGER 1
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/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
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#define DASD_EER_FATALERROR 1
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#define DASD_EER_NOPATH 2
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#define DASD_EER_STATECHANGE 3
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#define DASD_EER_PPRCSUSPEND 4
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#define DASD_EER_NOSPC 5
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/* DASD path handling */
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#define DASD_PATH_OPERATIONAL 1
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#define DASD_PATH_TBV 2
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#define DASD_PATH_PP 3
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#define DASD_PATH_NPP 4
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#define DASD_PATH_MISCABLED 5
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#define DASD_PATH_NOHPF 6
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#define DASD_PATH_CUIR 7
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#define DASD_PATH_IFCC 8
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#define DASD_PATH_FCSEC 9
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#define DASD_THRHLD_MAX 4294967295U
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#define DASD_INTERVAL_MAX 4294967295U
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/* FC Endpoint Security Capabilities */
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#define DASD_FC_SECURITY_UNSUP 0
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#define DASD_FC_SECURITY_AUTH 1
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#define DASD_FC_SECURITY_ENC_FCSP2 2
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#define DASD_FC_SECURITY_ENC_ERAS 3
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#define DASD_FC_SECURITY_ENC_STR "Encryption"
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static const struct {
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u8 value;
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char *name;
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} dasd_path_fcs_mnemonics[] = {
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{ DASD_FC_SECURITY_UNSUP, "Unsupported" },
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{ DASD_FC_SECURITY_AUTH, "Authentication" },
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{ DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR },
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|
{ DASD_FC_SECURITY_ENC_ERAS, DASD_FC_SECURITY_ENC_STR },
|
|
};
|
|
|
|
static inline char *dasd_path_get_fcs_str(int val)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dasd_path_fcs_mnemonics); i++) {
|
|
if (dasd_path_fcs_mnemonics[i].value == val)
|
|
return dasd_path_fcs_mnemonics[i].name;
|
|
}
|
|
|
|
return dasd_path_fcs_mnemonics[0].name;
|
|
}
|
|
|
|
struct dasd_path {
|
|
unsigned long flags;
|
|
u8 cssid;
|
|
u8 ssid;
|
|
u8 chpid;
|
|
struct dasd_conf_data *conf_data;
|
|
atomic_t error_count;
|
|
unsigned long errorclk;
|
|
u8 fc_security;
|
|
struct kobject kobj;
|
|
bool in_sysfs;
|
|
};
|
|
|
|
#define to_dasd_path(path) container_of(path, struct dasd_path, kobj)
|
|
|
|
static inline void dasd_path_release(struct kobject *kobj)
|
|
{
|
|
/* Memory for the dasd_path kobject is freed when dasd_free_device() is called */
|
|
}
|
|
|
|
|
|
struct dasd_profile_info {
|
|
/* legacy part of profile data, as in dasd_profile_info_t */
|
|
unsigned int dasd_io_reqs; /* number of requests processed */
|
|
unsigned int dasd_io_sects; /* number of sectors processed */
|
|
unsigned int dasd_io_secs[32]; /* histogram of request's sizes */
|
|
unsigned int dasd_io_times[32]; /* histogram of requests's times */
|
|
unsigned int dasd_io_timps[32]; /* h. of requests's times per sector */
|
|
unsigned int dasd_io_time1[32]; /* hist. of time from build to start */
|
|
unsigned int dasd_io_time2[32]; /* hist. of time from start to irq */
|
|
unsigned int dasd_io_time2ps[32]; /* hist. of time from start to irq */
|
|
unsigned int dasd_io_time3[32]; /* hist. of time from irq to end */
|
|
unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
|
|
|
|
/* new data */
|
|
struct timespec64 starttod; /* time of start or last reset */
|
|
unsigned int dasd_io_alias; /* requests using an alias */
|
|
unsigned int dasd_io_tpm; /* requests using transport mode */
|
|
unsigned int dasd_read_reqs; /* total number of read requests */
|
|
unsigned int dasd_read_sects; /* total number read sectors */
|
|
unsigned int dasd_read_alias; /* read request using an alias */
|
|
unsigned int dasd_read_tpm; /* read requests in transport mode */
|
|
unsigned int dasd_read_secs[32]; /* histogram of request's sizes */
|
|
unsigned int dasd_read_times[32]; /* histogram of requests's times */
|
|
unsigned int dasd_read_time1[32]; /* hist. time from build to start */
|
|
unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
|
|
unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
|
|
unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
|
|
unsigned long dasd_sum_times; /* sum of request times */
|
|
unsigned long dasd_sum_time_str; /* sum of time from build to start */
|
|
unsigned long dasd_sum_time_irq; /* sum of time from start to irq */
|
|
unsigned long dasd_sum_time_end; /* sum of time from irq to end */
|
|
};
|
|
|
|
struct dasd_profile {
|
|
struct dentry *dentry;
|
|
struct dasd_profile_info *data;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
struct dasd_format_entry {
|
|
struct list_head list;
|
|
sector_t track;
|
|
};
|
|
|
|
struct dasd_device {
|
|
/* Block device stuff. */
|
|
struct dasd_block *block;
|
|
|
|
unsigned int devindex;
|
|
unsigned long flags; /* per device flags */
|
|
unsigned short features; /* copy of devmap-features (read-only!) */
|
|
|
|
/* extended error reporting stuff (eer) */
|
|
struct dasd_ccw_req *eer_cqr;
|
|
|
|
/* Device discipline stuff. */
|
|
struct dasd_discipline *discipline;
|
|
struct dasd_discipline *base_discipline;
|
|
void *private;
|
|
struct dasd_path path[8];
|
|
__u8 opm;
|
|
|
|
/* Device state and target state. */
|
|
int state, target;
|
|
struct mutex state_mutex;
|
|
int stopped; /* device (ccw_device_start) was stopped */
|
|
|
|
/* reference count. */
|
|
atomic_t ref_count;
|
|
|
|
/* ccw queue and memory for static ccw/erp buffers. */
|
|
struct list_head ccw_queue;
|
|
spinlock_t mem_lock;
|
|
void *ccw_mem;
|
|
void *erp_mem;
|
|
void *ese_mem;
|
|
struct list_head ccw_chunks;
|
|
struct list_head erp_chunks;
|
|
struct list_head ese_chunks;
|
|
|
|
atomic_t tasklet_scheduled;
|
|
struct tasklet_struct tasklet;
|
|
struct work_struct kick_work;
|
|
struct work_struct reload_device;
|
|
struct work_struct kick_validate;
|
|
struct work_struct suc_work;
|
|
struct work_struct requeue_requests;
|
|
struct timer_list timer;
|
|
|
|
debug_info_t *debug_area;
|
|
|
|
struct ccw_device *cdev;
|
|
|
|
/* hook for alias management */
|
|
struct list_head alias_list;
|
|
|
|
/* default expiration time in s */
|
|
unsigned long default_expires;
|
|
unsigned long default_retries;
|
|
|
|
unsigned long blk_timeout;
|
|
|
|
unsigned long path_thrhld;
|
|
unsigned long path_interval;
|
|
|
|
struct dentry *debugfs_dentry;
|
|
struct dentry *hosts_dentry;
|
|
struct dasd_profile profile;
|
|
struct dasd_format_entry format_entry;
|
|
struct kset *paths_info;
|
|
};
|
|
|
|
struct dasd_block {
|
|
/* Block device stuff. */
|
|
struct gendisk *gdp;
|
|
struct request_queue *request_queue;
|
|
spinlock_t request_queue_lock;
|
|
struct blk_mq_tag_set tag_set;
|
|
struct block_device *bdev;
|
|
atomic_t open_count;
|
|
|
|
unsigned long blocks; /* size of volume in blocks */
|
|
unsigned int bp_block; /* bytes per block */
|
|
unsigned int s2b_shift; /* log2 (bp_block/512) */
|
|
|
|
struct dasd_device *base;
|
|
struct list_head ccw_queue;
|
|
spinlock_t queue_lock;
|
|
|
|
atomic_t tasklet_scheduled;
|
|
struct tasklet_struct tasklet;
|
|
struct timer_list timer;
|
|
|
|
struct dentry *debugfs_dentry;
|
|
struct dasd_profile profile;
|
|
|
|
struct list_head format_list;
|
|
spinlock_t format_lock;
|
|
};
|
|
|
|
struct dasd_attention_data {
|
|
struct dasd_device *device;
|
|
__u8 lpum;
|
|
};
|
|
|
|
struct dasd_queue {
|
|
spinlock_t lock;
|
|
};
|
|
|
|
/* reasons why device (ccw_device_start) was stopped */
|
|
#define DASD_STOPPED_NOT_ACC 1 /* not accessible */
|
|
#define DASD_STOPPED_QUIESCE 2 /* Quiesced */
|
|
#define DASD_STOPPED_PENDING 4 /* long busy */
|
|
#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
|
|
#define DASD_STOPPED_SU 16 /* summary unit check handling */
|
|
#define DASD_STOPPED_NOSPC 128 /* no space left */
|
|
|
|
/* per device flags */
|
|
#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
|
|
#define DASD_FLAG_EER_SNSS 4 /* A SNSS is required */
|
|
#define DASD_FLAG_EER_IN_USE 5 /* A SNSS request is running */
|
|
#define DASD_FLAG_DEVICE_RO 6 /* The device itself is read-only. Don't
|
|
* confuse this with the user specified
|
|
* read-only feature.
|
|
*/
|
|
#define DASD_FLAG_IS_RESERVED 7 /* The device is reserved */
|
|
#define DASD_FLAG_LOCK_STOLEN 8 /* The device lock was stolen */
|
|
#define DASD_FLAG_SUSPENDED 9 /* The device was suspended */
|
|
#define DASD_FLAG_SAFE_OFFLINE 10 /* safe offline processing requested*/
|
|
#define DASD_FLAG_SAFE_OFFLINE_RUNNING 11 /* safe offline running */
|
|
#define DASD_FLAG_ABORTALL 12 /* Abort all noretry requests */
|
|
#define DASD_FLAG_PATH_VERIFY 13 /* Path verification worker running */
|
|
#define DASD_FLAG_SUC 14 /* unhandled summary unit check */
|
|
|
|
#define DASD_SLEEPON_START_TAG ((void *) 1)
|
|
#define DASD_SLEEPON_END_TAG ((void *) 2)
|
|
|
|
void dasd_put_device_wake(struct dasd_device *);
|
|
|
|
/*
|
|
* Reference count inliners
|
|
*/
|
|
static inline void
|
|
dasd_get_device(struct dasd_device *device)
|
|
{
|
|
atomic_inc(&device->ref_count);
|
|
}
|
|
|
|
static inline void
|
|
dasd_put_device(struct dasd_device *device)
|
|
{
|
|
if (atomic_dec_return(&device->ref_count) == 0)
|
|
dasd_put_device_wake(device);
|
|
}
|
|
|
|
/*
|
|
* The static memory in ccw_mem and erp_mem is managed by a sorted
|
|
* list of free memory chunks.
|
|
*/
|
|
struct dasd_mchunk
|
|
{
|
|
struct list_head list;
|
|
unsigned long size;
|
|
} __attribute__ ((aligned(8)));
|
|
|
|
static inline void
|
|
dasd_init_chunklist(struct list_head *chunk_list, void *mem,
|
|
unsigned long size)
|
|
{
|
|
struct dasd_mchunk *chunk;
|
|
|
|
INIT_LIST_HEAD(chunk_list);
|
|
chunk = (struct dasd_mchunk *) mem;
|
|
chunk->size = size - sizeof(struct dasd_mchunk);
|
|
list_add(&chunk->list, chunk_list);
|
|
}
|
|
|
|
static inline void *
|
|
dasd_alloc_chunk(struct list_head *chunk_list, unsigned long size)
|
|
{
|
|
struct dasd_mchunk *chunk, *tmp;
|
|
|
|
size = (size + 7L) & -8L;
|
|
list_for_each_entry(chunk, chunk_list, list) {
|
|
if (chunk->size < size)
|
|
continue;
|
|
if (chunk->size > size + sizeof(struct dasd_mchunk)) {
|
|
char *endaddr = (char *) (chunk + 1) + chunk->size;
|
|
tmp = (struct dasd_mchunk *) (endaddr - size) - 1;
|
|
tmp->size = size;
|
|
chunk->size -= size + sizeof(struct dasd_mchunk);
|
|
chunk = tmp;
|
|
} else
|
|
list_del(&chunk->list);
|
|
return (void *) (chunk + 1);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static inline void
|
|
dasd_free_chunk(struct list_head *chunk_list, void *mem)
|
|
{
|
|
struct dasd_mchunk *chunk, *tmp;
|
|
struct list_head *p, *left;
|
|
|
|
chunk = (struct dasd_mchunk *)
|
|
((char *) mem - sizeof(struct dasd_mchunk));
|
|
/* Find out the left neighbour in chunk_list. */
|
|
left = chunk_list;
|
|
list_for_each(p, chunk_list) {
|
|
if (list_entry(p, struct dasd_mchunk, list) > chunk)
|
|
break;
|
|
left = p;
|
|
}
|
|
/* Try to merge with right neighbour = next element from left. */
|
|
if (left->next != chunk_list) {
|
|
tmp = list_entry(left->next, struct dasd_mchunk, list);
|
|
if ((char *) (chunk + 1) + chunk->size == (char *) tmp) {
|
|
list_del(&tmp->list);
|
|
chunk->size += tmp->size + sizeof(struct dasd_mchunk);
|
|
}
|
|
}
|
|
/* Try to merge with left neighbour. */
|
|
if (left != chunk_list) {
|
|
tmp = list_entry(left, struct dasd_mchunk, list);
|
|
if ((char *) (tmp + 1) + tmp->size == (char *) chunk) {
|
|
tmp->size += chunk->size + sizeof(struct dasd_mchunk);
|
|
return;
|
|
}
|
|
}
|
|
__list_add(&chunk->list, left, left->next);
|
|
}
|
|
|
|
/*
|
|
* Check if bsize is in { 512, 1024, 2048, 4096 }
|
|
*/
|
|
static inline int
|
|
dasd_check_blocksize(int bsize)
|
|
{
|
|
if (bsize < 512 || bsize > 4096 || !is_power_of_2(bsize))
|
|
return -EMEDIUMTYPE;
|
|
return 0;
|
|
}
|
|
|
|
/* externals in dasd.c */
|
|
#define DASD_PROFILE_OFF 0
|
|
#define DASD_PROFILE_ON 1
|
|
#define DASD_PROFILE_GLOBAL_ONLY 2
|
|
|
|
extern debug_info_t *dasd_debug_area;
|
|
extern struct dasd_profile dasd_global_profile;
|
|
extern unsigned int dasd_global_profile_level;
|
|
extern const struct block_device_operations dasd_device_operations;
|
|
|
|
extern struct kmem_cache *dasd_page_cache;
|
|
|
|
struct dasd_ccw_req *
|
|
dasd_smalloc_request(int, int, int, struct dasd_device *, struct dasd_ccw_req *);
|
|
struct dasd_ccw_req *dasd_fmalloc_request(int, int, int, struct dasd_device *);
|
|
void dasd_sfree_request(struct dasd_ccw_req *, struct dasd_device *);
|
|
void dasd_ffree_request(struct dasd_ccw_req *, struct dasd_device *);
|
|
void dasd_wakeup_cb(struct dasd_ccw_req *, void *);
|
|
|
|
struct dasd_device *dasd_alloc_device(void);
|
|
void dasd_free_device(struct dasd_device *);
|
|
|
|
struct dasd_block *dasd_alloc_block(void);
|
|
void dasd_free_block(struct dasd_block *);
|
|
|
|
enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
|
|
|
|
void dasd_enable_device(struct dasd_device *);
|
|
void dasd_set_target_state(struct dasd_device *, int);
|
|
void dasd_kick_device(struct dasd_device *);
|
|
void dasd_reload_device(struct dasd_device *);
|
|
void dasd_schedule_requeue(struct dasd_device *);
|
|
|
|
void dasd_add_request_head(struct dasd_ccw_req *);
|
|
void dasd_add_request_tail(struct dasd_ccw_req *);
|
|
int dasd_start_IO(struct dasd_ccw_req *);
|
|
int dasd_term_IO(struct dasd_ccw_req *);
|
|
void dasd_schedule_device_bh(struct dasd_device *);
|
|
void dasd_schedule_block_bh(struct dasd_block *);
|
|
int dasd_sleep_on(struct dasd_ccw_req *);
|
|
int dasd_sleep_on_queue(struct list_head *);
|
|
int dasd_sleep_on_immediatly(struct dasd_ccw_req *);
|
|
int dasd_sleep_on_queue_interruptible(struct list_head *);
|
|
int dasd_sleep_on_interruptible(struct dasd_ccw_req *);
|
|
void dasd_device_set_timer(struct dasd_device *, int);
|
|
void dasd_device_clear_timer(struct dasd_device *);
|
|
void dasd_block_set_timer(struct dasd_block *, int);
|
|
void dasd_block_clear_timer(struct dasd_block *);
|
|
int dasd_cancel_req(struct dasd_ccw_req *);
|
|
int dasd_flush_device_queue(struct dasd_device *);
|
|
int dasd_generic_probe(struct ccw_device *);
|
|
void dasd_generic_free_discipline(struct dasd_device *);
|
|
void dasd_generic_remove (struct ccw_device *cdev);
|
|
int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
|
|
int dasd_generic_set_offline (struct ccw_device *cdev);
|
|
int dasd_generic_notify(struct ccw_device *, int);
|
|
int dasd_generic_last_path_gone(struct dasd_device *);
|
|
int dasd_generic_path_operational(struct dasd_device *);
|
|
void dasd_generic_shutdown(struct ccw_device *);
|
|
|
|
void dasd_generic_handle_state_change(struct dasd_device *);
|
|
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
|
|
void dasd_generic_path_event(struct ccw_device *, int *);
|
|
int dasd_generic_verify_path(struct dasd_device *, __u8);
|
|
void dasd_generic_space_exhaust(struct dasd_device *, struct dasd_ccw_req *);
|
|
void dasd_generic_space_avail(struct dasd_device *);
|
|
|
|
int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
|
|
char *dasd_get_sense(struct irb *);
|
|
|
|
void dasd_device_set_stop_bits(struct dasd_device *, int);
|
|
void dasd_device_remove_stop_bits(struct dasd_device *, int);
|
|
|
|
int dasd_device_is_ro(struct dasd_device *);
|
|
|
|
void dasd_profile_reset(struct dasd_profile *);
|
|
int dasd_profile_on(struct dasd_profile *);
|
|
void dasd_profile_off(struct dasd_profile *);
|
|
char *dasd_get_user_string(const char __user *, size_t);
|
|
|
|
/* externals in dasd_devmap.c */
|
|
extern int dasd_max_devindex;
|
|
extern int dasd_probeonly;
|
|
extern int dasd_autodetect;
|
|
extern int dasd_nopav;
|
|
extern int dasd_nofcx;
|
|
|
|
int dasd_devmap_init(void);
|
|
void dasd_devmap_exit(void);
|
|
|
|
struct dasd_device *dasd_create_device(struct ccw_device *);
|
|
void dasd_delete_device(struct dasd_device *);
|
|
|
|
int dasd_get_feature(struct ccw_device *, int);
|
|
int dasd_set_feature(struct ccw_device *, int, int);
|
|
|
|
int dasd_add_sysfs_files(struct ccw_device *);
|
|
void dasd_remove_sysfs_files(struct ccw_device *);
|
|
void dasd_path_create_kobj(struct dasd_device *, int);
|
|
void dasd_path_create_kobjects(struct dasd_device *);
|
|
void dasd_path_remove_kobjects(struct dasd_device *);
|
|
|
|
struct dasd_device *dasd_device_from_cdev(struct ccw_device *);
|
|
struct dasd_device *dasd_device_from_cdev_locked(struct ccw_device *);
|
|
struct dasd_device *dasd_device_from_devindex(int);
|
|
|
|
void dasd_add_link_to_gendisk(struct gendisk *, struct dasd_device *);
|
|
struct dasd_device *dasd_device_from_gendisk(struct gendisk *);
|
|
|
|
int dasd_parse(void) __init;
|
|
int dasd_busid_known(const char *);
|
|
|
|
/* externals in dasd_gendisk.c */
|
|
int dasd_gendisk_init(void);
|
|
void dasd_gendisk_exit(void);
|
|
int dasd_gendisk_alloc(struct dasd_block *);
|
|
void dasd_gendisk_free(struct dasd_block *);
|
|
int dasd_scan_partitions(struct dasd_block *);
|
|
void dasd_destroy_partitions(struct dasd_block *);
|
|
|
|
/* externals in dasd_ioctl.c */
|
|
int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);
|
|
int dasd_set_read_only(struct block_device *bdev, bool ro);
|
|
|
|
/* externals in dasd_proc.c */
|
|
int dasd_proc_init(void);
|
|
void dasd_proc_exit(void);
|
|
|
|
/* externals in dasd_erp.c */
|
|
struct dasd_ccw_req *dasd_default_erp_action(struct dasd_ccw_req *);
|
|
struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *);
|
|
struct dasd_ccw_req *dasd_alloc_erp_request(char *, int, int,
|
|
struct dasd_device *);
|
|
void dasd_free_erp_request(struct dasd_ccw_req *, struct dasd_device *);
|
|
void dasd_log_sense(struct dasd_ccw_req *, struct irb *);
|
|
void dasd_log_sense_dbf(struct dasd_ccw_req *cqr, struct irb *irb);
|
|
|
|
/* externals in dasd_3990_erp.c */
|
|
struct dasd_ccw_req *dasd_3990_erp_action(struct dasd_ccw_req *);
|
|
void dasd_3990_erp_handle_sim(struct dasd_device *, char *);
|
|
|
|
/* externals in dasd_eer.c */
|
|
#ifdef CONFIG_DASD_EER
|
|
int dasd_eer_init(void);
|
|
void dasd_eer_exit(void);
|
|
int dasd_eer_enable(struct dasd_device *);
|
|
void dasd_eer_disable(struct dasd_device *);
|
|
void dasd_eer_write(struct dasd_device *, struct dasd_ccw_req *cqr,
|
|
unsigned int id);
|
|
void dasd_eer_snss(struct dasd_device *);
|
|
|
|
static inline int dasd_eer_enabled(struct dasd_device *device)
|
|
{
|
|
return device->eer_cqr != NULL;
|
|
}
|
|
#else
|
|
#define dasd_eer_init() (0)
|
|
#define dasd_eer_exit() do { } while (0)
|
|
#define dasd_eer_enable(d) (0)
|
|
#define dasd_eer_disable(d) do { } while (0)
|
|
#define dasd_eer_write(d,c,i) do { } while (0)
|
|
#define dasd_eer_snss(d) do { } while (0)
|
|
#define dasd_eer_enabled(d) (0)
|
|
#endif /* CONFIG_DASD_ERR */
|
|
|
|
|
|
/* DASD path handling functions */
|
|
|
|
/*
|
|
* helper functions to modify bit masks for a given channel path for a device
|
|
*/
|
|
static inline int dasd_path_is_operational(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_need_verify(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_TBV, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_verify(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_TBV, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_verify(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_TBV, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_all_verify(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
dasd_path_clear_verify(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_fcsec(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_fcsec(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_need_fcsec(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_FCSEC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_all_fcsec(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
dasd_path_clear_fcsec(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_operational(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
|
|
device->opm |= (0x80 >> chp);
|
|
}
|
|
|
|
static inline void dasd_path_nonpreferred(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_NPP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_nonpreferred(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_NPP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_nonpreferred(struct dasd_device *device,
|
|
int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_NPP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_preferred(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_PP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_preferred(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_PP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_preferred(struct dasd_device *device,
|
|
int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_PP, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_oper(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_OPERATIONAL, &device->path[chp].flags);
|
|
device->opm &= ~(0x80 >> chp);
|
|
}
|
|
|
|
static inline void dasd_path_clear_cable(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_cuir(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_CUIR, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_cuir(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_CUIR, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_cuir(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_CUIR, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_ifcc(struct dasd_device *device, int chp)
|
|
{
|
|
set_bit(DASD_PATH_IFCC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_ifcc(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_IFCC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_ifcc(struct dasd_device *device, int chp)
|
|
{
|
|
clear_bit(DASD_PATH_IFCC, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_clear_nohpf(struct dasd_device *device, int chp)
|
|
{
|
|
__clear_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_miscabled(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_miscabled(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_MISCABLED, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline void dasd_path_nohpf(struct dasd_device *device, int chp)
|
|
{
|
|
__set_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
|
|
}
|
|
|
|
static inline int dasd_path_is_nohpf(struct dasd_device *device, int chp)
|
|
{
|
|
return test_bit(DASD_PATH_NOHPF, &device->path[chp].flags);
|
|
}
|
|
|
|
/*
|
|
* get functions for path masks
|
|
* will return a path masks for the given device
|
|
*/
|
|
|
|
static inline __u8 dasd_path_get_opm(struct dasd_device *device)
|
|
{
|
|
return device->opm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_tbvpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 tbvpm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_need_verify(device, chp))
|
|
tbvpm |= 0x80 >> chp;
|
|
return tbvpm;
|
|
}
|
|
|
|
static inline int dasd_path_get_fcsecpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_need_fcsec(device, chp))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_nppm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 npm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++) {
|
|
if (dasd_path_is_nonpreferred(device, chp))
|
|
npm |= 0x80 >> chp;
|
|
}
|
|
return npm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_ppm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 ppm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_preferred(device, chp))
|
|
ppm |= 0x80 >> chp;
|
|
return ppm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_cablepm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 cablepm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_miscabled(device, chp))
|
|
cablepm |= 0x80 >> chp;
|
|
return cablepm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_cuirpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 cuirpm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_cuir(device, chp))
|
|
cuirpm |= 0x80 >> chp;
|
|
return cuirpm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_ifccpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 ifccpm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_ifcc(device, chp))
|
|
ifccpm |= 0x80 >> chp;
|
|
return ifccpm;
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_hpfpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 hpfpm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_nohpf(device, chp))
|
|
hpfpm |= 0x80 >> chp;
|
|
return hpfpm;
|
|
}
|
|
|
|
static inline u8 dasd_path_get_fcs_path(struct dasd_device *device, int chp)
|
|
{
|
|
return device->path[chp].fc_security;
|
|
}
|
|
|
|
static inline int dasd_path_get_fcs_device(struct dasd_device *device)
|
|
{
|
|
u8 fc_sec = 0;
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++) {
|
|
if (device->opm & (0x80 >> chp)) {
|
|
fc_sec = device->path[chp].fc_security;
|
|
break;
|
|
}
|
|
}
|
|
for (; chp < 8; chp++) {
|
|
if (device->opm & (0x80 >> chp))
|
|
if (device->path[chp].fc_security != fc_sec)
|
|
return -EINVAL;
|
|
}
|
|
|
|
return fc_sec;
|
|
}
|
|
|
|
/*
|
|
* add functions for path masks
|
|
* the existing path mask will be extended by the given path mask
|
|
*/
|
|
static inline void dasd_path_add_tbvpm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_verify(device, chp);
|
|
}
|
|
|
|
static inline __u8 dasd_path_get_notoperpm(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
__u8 nopm = 0x00;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (dasd_path_is_nohpf(device, chp) ||
|
|
dasd_path_is_ifcc(device, chp) ||
|
|
dasd_path_is_cuir(device, chp) ||
|
|
dasd_path_is_miscabled(device, chp))
|
|
nopm |= 0x80 >> chp;
|
|
return nopm;
|
|
}
|
|
|
|
static inline void dasd_path_add_opm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp)) {
|
|
dasd_path_operational(device, chp);
|
|
/*
|
|
* if the path is used
|
|
* it should not be in one of the negative lists
|
|
*/
|
|
dasd_path_clear_nohpf(device, chp);
|
|
dasd_path_clear_cuir(device, chp);
|
|
dasd_path_clear_cable(device, chp);
|
|
dasd_path_clear_ifcc(device, chp);
|
|
}
|
|
}
|
|
|
|
static inline void dasd_path_add_cablepm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_miscabled(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_add_cuirpm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_cuir(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_add_ifccpm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_ifcc(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_add_nppm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_nonpreferred(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_add_nohpfpm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_nohpf(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_add_ppm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_preferred(device, chp);
|
|
}
|
|
|
|
/*
|
|
* set functions for path masks
|
|
* the existing path mask will be replaced by the given path mask
|
|
*/
|
|
static inline void dasd_path_set_tbvpm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_verify(device, chp);
|
|
else
|
|
dasd_path_clear_verify(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_set_opm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++) {
|
|
dasd_path_clear_oper(device, chp);
|
|
if (pm & (0x80 >> chp)) {
|
|
dasd_path_operational(device, chp);
|
|
/*
|
|
* if the path is used
|
|
* it should not be in one of the negative lists
|
|
*/
|
|
dasd_path_clear_nohpf(device, chp);
|
|
dasd_path_clear_cuir(device, chp);
|
|
dasd_path_clear_cable(device, chp);
|
|
dasd_path_clear_ifcc(device, chp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* remove functions for path masks
|
|
* the existing path mask will be cleared with the given path mask
|
|
*/
|
|
static inline void dasd_path_remove_opm(struct dasd_device *device, __u8 pm)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++) {
|
|
if (pm & (0x80 >> chp))
|
|
dasd_path_clear_oper(device, chp);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* add the newly available path to the to be verified pm and remove it from
|
|
* normal operation until it is verified
|
|
*/
|
|
static inline void dasd_path_available(struct dasd_device *device, int chp)
|
|
{
|
|
dasd_path_clear_oper(device, chp);
|
|
dasd_path_verify(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_notoper(struct dasd_device *device, int chp)
|
|
{
|
|
dasd_path_clear_oper(device, chp);
|
|
dasd_path_clear_preferred(device, chp);
|
|
dasd_path_clear_nonpreferred(device, chp);
|
|
}
|
|
|
|
static inline void dasd_path_fcsec_update(struct dasd_device *device, int chp)
|
|
{
|
|
dasd_path_fcsec(device, chp);
|
|
}
|
|
|
|
/*
|
|
* remove all paths from normal operation
|
|
*/
|
|
static inline void dasd_path_no_path(struct dasd_device *device)
|
|
{
|
|
int chp;
|
|
|
|
for (chp = 0; chp < 8; chp++)
|
|
dasd_path_notoper(device, chp);
|
|
|
|
dasd_path_clear_all_verify(device);
|
|
}
|
|
|
|
/* end - path handling */
|
|
|
|
#endif /* DASD_H */
|