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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/s390/block/dasd_int.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/s390/block/dasd_int.h')
-rw-r--r--drivers/s390/block/dasd_int.h1493
1 files changed, 1493 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
new file mode 100644
index 000000000..f50932518
--- /dev/null
+++ b/drivers/s390/block/dasd_int.h
@@ -0,0 +1,1493 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Horst Hummel <Horst.Hummel@de.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * Copyright IBM Corp. 1999, 2009
+ */
+
+#ifndef DASD_INT_H
+#define DASD_INT_H
+
+/* we keep old device allocation scheme; IOW, minors are still in 0..255 */
+#define DASD_PER_MAJOR (1U << (MINORBITS - DASD_PARTN_BITS))
+#define DASD_PARTN_MASK ((1 << DASD_PARTN_BITS) - 1)
+
+/*
+ * States a dasd device can have:
+ * new: the dasd_device structure is allocated.
+ * known: the discipline for the device is identified.
+ * basic: the device can do basic i/o.
+ * unfmt: the device could not be analyzed (format is unknown).
+ * ready: partition detection is done and the device is can do block io.
+ * online: the device accepts requests from the block device queue.
+ *
+ * Things to do for startup state transitions:
+ * new -> known: find discipline for the device and create devfs entries.
+ * known -> basic: request irq line for the device.
+ * basic -> ready: do the initial analysis, e.g. format detection,
+ * do block device setup and detect partitions.
+ * ready -> online: schedule the device tasklet.
+ * Things to do for shutdown state transitions:
+ * online -> ready: just set the new device state.
+ * ready -> basic: flush requests from the block device layer, clear
+ * partition information and reset format information.
+ * basic -> known: terminate all requests and free irq.
+ * known -> new: remove devfs entries and forget discipline.
+ */
+
+#define DASD_STATE_NEW 0
+#define DASD_STATE_KNOWN 1
+#define DASD_STATE_BASIC 2
+#define DASD_STATE_UNFMT 3
+#define DASD_STATE_READY 4
+#define DASD_STATE_ONLINE 5
+
+#include <linux/module.h>
+#include <linux/wait.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/interrupt.h>
+#include <linux/log2.h>
+#include <asm/ccwdev.h>
+#include <linux/workqueue.h>
+#include <asm/debug.h>
+#include <asm/dasd.h>
+#include <asm/idals.h>
+#include <linux/bitops.h>
+#include <linux/blk-mq.h>
+
+/* DASD discipline magic */
+#define DASD_ECKD_MAGIC 0xC5C3D2C4
+#define DASD_DIAG_MAGIC 0xC4C9C1C7
+#define DASD_FBA_MAGIC 0xC6C2C140
+
+/*
+ * SECTION: Type definitions
+ */
+struct dasd_device;
+struct dasd_block;
+
+/* BIT DEFINITIONS FOR SENSE DATA */
+#define DASD_SENSE_BIT_0 0x80
+#define DASD_SENSE_BIT_1 0x40
+#define DASD_SENSE_BIT_2 0x20
+#define DASD_SENSE_BIT_3 0x10
+
+/* BIT DEFINITIONS FOR SIM SENSE */
+#define DASD_SIM_SENSE 0x0F
+#define DASD_SIM_MSG_TO_OP 0x03
+#define DASD_SIM_LOG 0x0C
+
+/* lock class for nested cdev lock */
+#define CDEV_NESTED_FIRST 1
+#define CDEV_NESTED_SECOND 2
+
+/*
+ * SECTION: MACROs for klogd and s390 debug feature (dbf)
+ */
+#define DBF_DEV_EVENT(d_level, d_device, d_str, d_data...) \
+do { \
+ debug_sprintf_event(d_device->debug_area, \
+ d_level, \
+ d_str "\n", \
+ d_data); \
+} while(0)
+
+#define DBF_EVENT(d_level, d_str, d_data...)\
+do { \
+ debug_sprintf_event(dasd_debug_area, \
+ d_level,\
+ d_str "\n", \
+ d_data); \
+} while(0)
+
+#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...) \
+do { \
+ struct ccw_dev_id __dev_id; \
+ ccw_device_get_id(d_cdev, &__dev_id); \
+ debug_sprintf_event(dasd_debug_area, \
+ d_level, \
+ "0.%x.%04x " d_str "\n", \
+ __dev_id.ssid, __dev_id.devno, d_data); \
+} while (0)
+
+/* limit size for an errorstring */
+#define ERRORLENGTH 30
+
+/* definition of dbf debug levels */
+#define DBF_EMERG 0 /* system is unusable */
+#define DBF_ALERT 1 /* action must be taken immediately */
+#define DBF_CRIT 2 /* critical conditions */
+#define DBF_ERR 3 /* error conditions */
+#define DBF_WARNING 4 /* warning conditions */
+#define DBF_NOTICE 5 /* normal but significant condition */
+#define DBF_INFO 6 /* informational */
+#define DBF_DEBUG 6 /* debug-level messages */
+
+/* messages to be written via klogd and dbf */
+#define DEV_MESSAGE(d_loglevel,d_device,d_string,d_args...)\
+do { \
+ printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
+ dev_name(&d_device->cdev->dev), d_args); \
+ DBF_DEV_EVENT(DBF_ALERT, d_device, d_string, d_args); \
+} while(0)
+
+#define MESSAGE(d_loglevel,d_string,d_args...)\
+do { \
+ printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
+ DBF_EVENT(DBF_ALERT, d_string, d_args); \
+} while(0)
+
+/* messages to be written via klogd only */
+#define DEV_MESSAGE_LOG(d_loglevel,d_device,d_string,d_args...)\
+do { \
+ printk(d_loglevel PRINTK_HEADER " %s: " d_string "\n", \
+ dev_name(&d_device->cdev->dev), d_args); \
+} while(0)
+
+#define MESSAGE_LOG(d_loglevel,d_string,d_args...)\
+do { \
+ printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
+} while(0)
+
+/* Macro to calculate number of blocks per page */
+#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
+
+struct dasd_ccw_req {
+ unsigned int magic; /* Eye catcher */
+ int intrc; /* internal error, e.g. from start_IO */
+ struct list_head devlist; /* for dasd_device request queue */
+ struct list_head blocklist; /* for dasd_block request queue */
+ struct dasd_block *block; /* the originating block device */
+ struct dasd_device *memdev; /* the device used to allocate this */
+ struct dasd_device *startdev; /* device the request is started on */
+ struct dasd_device *basedev; /* base device if no block->base */
+ void *cpaddr; /* address of ccw or tcw */
+ short retries; /* A retry counter */
+ unsigned char cpmode; /* 0 = cmd mode, 1 = itcw */
+ char status; /* status of this request */
+ char lpm; /* logical path mask */
+ unsigned long flags; /* flags of this request */
+ struct dasd_queue *dq;
+ unsigned long starttime; /* jiffies time of request start */
+ unsigned long expires; /* expiration period in jiffies */
+ void *data; /* pointer to data area */
+ struct irb irb; /* device status in case of an error */
+ struct dasd_ccw_req *refers; /* ERP-chain queueing. */
+ void *function; /* originating ERP action */
+ void *mem_chunk;
+
+ unsigned long buildclk; /* TOD-clock of request generation */
+ unsigned long startclk; /* TOD-clock of request start */
+ unsigned long stopclk; /* TOD-clock of request interrupt */
+ unsigned long endclk; /* TOD-clock of request termination */
+
+ void (*callback)(struct dasd_ccw_req *, void *data);
+ void *callback_data;
+ unsigned int proc_bytes; /* bytes for partial completion */
+ unsigned int trkcount; /* count formatted tracks */
+};
+
+/*
+ * dasd_ccw_req -> status can be:
+ */
+#define DASD_CQR_FILLED 0x00 /* request is ready to be processed */
+#define DASD_CQR_DONE 0x01 /* request is completed successfully */
+#define DASD_CQR_NEED_ERP 0x02 /* request needs recovery action */
+#define DASD_CQR_IN_ERP 0x03 /* request is in recovery */
+#define DASD_CQR_FAILED 0x04 /* request is finally failed */
+#define DASD_CQR_TERMINATED 0x05 /* request was stopped by driver */
+
+#define DASD_CQR_QUEUED 0x80 /* request is queued to be processed */
+#define DASD_CQR_IN_IO 0x81 /* request is currently in IO */
+#define DASD_CQR_ERROR 0x82 /* request is completed with error */
+#define DASD_CQR_CLEAR_PENDING 0x83 /* request is clear pending */
+#define DASD_CQR_CLEARED 0x84 /* request was cleared */
+#define DASD_CQR_SUCCESS 0x85 /* request was successful */
+
+/* default expiration time*/
+#define DASD_EXPIRES 300
+#define DASD_EXPIRES_MAX 40000000
+#define DASD_RETRIES 256
+#define DASD_RETRIES_MAX 32768
+
+/* per dasd_ccw_req flags */
+#define DASD_CQR_FLAGS_USE_ERP 0 /* use ERP for this request */
+#define DASD_CQR_FLAGS_FAILFAST 1 /* FAILFAST */
+#define DASD_CQR_VERIFY_PATH 2 /* path verification request */
+#define DASD_CQR_ALLOW_SLOCK 3 /* Try this request even when lock was
+ * stolen. Should not be combined with
+ * DASD_CQR_FLAGS_USE_ERP
+ */
+/*
+ * The following flags are used to suppress output of certain errors.
+ */
+#define DASD_CQR_SUPPRESS_NRF 4 /* Suppress 'No Record Found' error */
+#define DASD_CQR_SUPPRESS_FP 5 /* Suppress 'File Protected' error*/
+#define DASD_CQR_SUPPRESS_IL 6 /* Suppress 'Incorrect Length' error */
+#define DASD_CQR_SUPPRESS_CR 7 /* Suppress 'Command Reject' error */
+
+#define DASD_REQ_PER_DEV 4
+
+/* Signature for error recovery functions. */
+typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
+
+/*
+ * A single CQR can only contain a maximum of 255 CCWs. It is limited by
+ * the locate record and locate record extended count value which can only hold
+ * 1 Byte max.
+ */
+#define DASD_CQR_MAX_CCW 255
+
+/*
+ * Unique identifier for dasd device.
+ */
+#define UA_NOT_CONFIGURED 0x00
+#define UA_BASE_DEVICE 0x01
+#define UA_BASE_PAV_ALIAS 0x02
+#define UA_HYPER_PAV_ALIAS 0x03
+
+struct dasd_uid {
+ __u8 type;
+ char vendor[4];
+ char serial[15];
+ __u16 ssid;
+ __u8 real_unit_addr;
+ __u8 base_unit_addr;
+ char vduit[33];
+};
+
+#define DASD_UID_STRLEN ( /* vendor */ 3 + 1 + /* serial */ 14 + 1 + \
+ /* SSID */ 4 + 1 + /* unit addr */ 2 + 1 + \
+ /* vduit */ 32 + 1)
+
+/*
+ * PPRC Status data
+ */
+struct dasd_pprc_header {
+ __u8 entries; /* 0 Number of device entries */
+ __u8 unused; /* 1 unused */
+ __u16 entry_length; /* 2-3 Length of device entry */
+ __u32 unused2; /* 4-7 unused */
+} __packed;
+
+struct dasd_pprc_dev_info {
+ __u8 state; /* 0 Copy State */
+ __u8 flags; /* 1 Flags */
+ __u8 reserved1[2]; /* 2-3 reserved */
+ __u8 prim_lss; /* 4 Primary device LSS */
+ __u8 primary; /* 5 Primary device address */
+ __u8 sec_lss; /* 6 Secondary device LSS */
+ __u8 secondary; /* 7 Secondary device address */
+ __u16 pprc_id; /* 8-9 Peer-to-Peer Remote Copy ID */
+ __u8 reserved2[12]; /* 10-21 reserved */
+ __u16 prim_cu_ssid; /* 22-23 Pimary Control Unit SSID */
+ __u8 reserved3[12]; /* 24-35 reserved */
+ __u16 sec_cu_ssid; /* 36-37 Secondary Control Unit SSID */
+ __u8 reserved4[90]; /* 38-127 reserved */
+} __packed;
+
+struct dasd_pprc_data_sc4 {
+ struct dasd_pprc_header header;
+ struct dasd_pprc_dev_info dev_info[5];
+} __packed;
+
+#define DASD_BUS_ID_SIZE 20
+#define DASD_CP_ENTRIES 5
+
+struct dasd_copy_entry {
+ char busid[DASD_BUS_ID_SIZE];
+ struct dasd_device *device;
+ bool primary;
+ bool configured;
+};
+
+struct dasd_copy_relation {
+ struct dasd_copy_entry entry[DASD_CP_ENTRIES];
+ struct dasd_copy_entry *active;
+};
+
+int dasd_devmap_set_device_copy_relation(struct ccw_device *,
+ bool pprc_enabled);
+
+/*
+ * the struct dasd_discipline is
+ * sth like a table of virtual functions, if you think of dasd_eckd
+ * inheriting dasd...
+ * no, currently we are not planning to reimplement the driver in C++
+ */
+struct dasd_discipline {
+ struct module *owner;
+ char ebcname[8]; /* a name used for tagging and printks */
+ char name[8]; /* a name used for tagging and printks */
+
+ struct list_head list; /* used for list of disciplines */
+
+ /*
+ * Device recognition functions. check_device is used to verify
+ * the sense data and the information returned by read device
+ * characteristics. It returns 0 if the discipline can be used
+ * for the device in question. uncheck_device is called during
+ * device shutdown to deregister a device from its discipline.
+ */
+ int (*check_device) (struct dasd_device *);
+ void (*uncheck_device) (struct dasd_device *);
+
+ /*
+ * do_analysis is used in the step from device state "basic" to
+ * state "accept". It returns 0 if the device can be made ready,
+ * it returns -EMEDIUMTYPE if the device can't be made ready or
+ * -EAGAIN if do_analysis started a ccw that needs to complete
+ * before the analysis may be repeated.
+ */
+ int (*do_analysis) (struct dasd_block *);
+
+ /*
+ * This function is called, when new paths become available.
+ * Disciplins may use this callback to do necessary setup work,
+ * e.g. verify that new path is compatible with the current
+ * configuration.
+ */
+ int (*pe_handler)(struct dasd_device *, __u8, __u8);
+
+ /*
+ * Last things to do when a device is set online, and first things
+ * when it is set offline.
+ */
+ int (*basic_to_ready) (struct dasd_device *);
+ int (*online_to_ready) (struct dasd_device *);
+ int (*basic_to_known)(struct dasd_device *);
+
+ /*
+ * Initialize block layer request queue.
+ */
+ void (*setup_blk_queue)(struct dasd_block *);
+ /* (struct dasd_device *);
+ * Device operation functions. build_cp creates a ccw chain for
+ * a block device request, start_io starts the request and
+ * term_IO cancels it (e.g. in case of a timeout). format_device
+ * formats the device and check_device_format compares the format of
+ * a device with the expected format_data.
+ * handle_terminated_request allows to examine a cqr and prepare
+ * it for retry.
+ */
+ struct dasd_ccw_req *(*build_cp) (struct dasd_device *,
+ struct dasd_block *,
+ struct request *);
+ int (*start_IO) (struct dasd_ccw_req *);
+ int (*term_IO) (struct dasd_ccw_req *);
+ void (*handle_terminated_request) (struct dasd_ccw_req *);
+ int (*format_device) (struct dasd_device *,
+ struct format_data_t *, int);
+ int (*check_device_format)(struct dasd_device *,
+ struct format_check_t *, int);
+ int (*free_cp) (struct dasd_ccw_req *, struct request *);
+
+ /*
+ * Error recovery functions. examine_error() returns a value that
+ * indicates what to do for an error condition. If examine_error()
+ * returns 'dasd_era_recover' erp_action() is called to create a
+ * special error recovery ccw. erp_postaction() is called after
+ * an error recovery ccw has finished its execution. dump_sense
+ * is called for every error condition to print the sense data
+ * to the console.
+ */
+ dasd_erp_fn_t(*erp_action) (struct dasd_ccw_req *);
+ dasd_erp_fn_t(*erp_postaction) (struct dasd_ccw_req *);
+ void (*dump_sense) (struct dasd_device *, struct dasd_ccw_req *,
+ struct irb *);
+ void (*dump_sense_dbf) (struct dasd_device *, struct irb *, char *);
+ void (*check_for_device_change) (struct dasd_device *,
+ struct dasd_ccw_req *,
+ struct irb *);
+
+ /* i/o control functions. */
+ int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
+ int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
+ int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
+
+ /* reload device after state change */
+ int (*reload) (struct dasd_device *);
+
+ int (*get_uid) (struct dasd_device *, struct dasd_uid *);
+ void (*kick_validate) (struct dasd_device *);
+ int (*check_attention)(struct dasd_device *, __u8);
+ int (*host_access_count)(struct dasd_device *);
+ int (*hosts_print)(struct dasd_device *, struct seq_file *);
+ void (*handle_hpf_error)(struct dasd_device *, struct irb *);
+ void (*disable_hpf)(struct dasd_device *);
+ int (*hpf_enabled)(struct dasd_device *);
+ void (*reset_path)(struct dasd_device *, __u8);
+
+ /*
+ * Extent Space Efficient (ESE) relevant functions
+ */
+ int (*is_ese)(struct dasd_device *);
+ /* Capacity */
+ int (*space_allocated)(struct dasd_device *);
+ int (*space_configured)(struct dasd_device *);
+ int (*logical_capacity)(struct dasd_device *);
+ int (*release_space)(struct dasd_device *, struct format_data_t *);
+ /* Extent Pool */
+ int (*ext_pool_id)(struct dasd_device *);
+ int (*ext_size)(struct dasd_device *);
+ int (*ext_pool_cap_at_warnlevel)(struct dasd_device *);
+ int (*ext_pool_warn_thrshld)(struct dasd_device *);
+ int (*ext_pool_oos)(struct dasd_device *);
+ int (*ext_pool_exhaust)(struct dasd_device *, struct dasd_ccw_req *);
+ struct dasd_ccw_req *(*ese_format)(struct dasd_device *,
+ struct dasd_ccw_req *, struct irb *);
+ int (*ese_read)(struct dasd_ccw_req *, struct irb *);
+ int (*pprc_status)(struct dasd_device *, struct dasd_pprc_data_sc4 *);
+ bool (*pprc_enabled)(struct dasd_device *);
+ int (*copy_pair_swap)(struct dasd_device *, char *, char *);
+ int (*device_ping)(struct dasd_device *);
+};
+
+extern struct dasd_discipline *dasd_diag_discipline_pointer;
+
+/*
+ * Notification numbers for extended error reporting notifications:
+ * The DASD_EER_DISABLE notification is sent before a dasd_device (and it's
+ * eer pointer) is freed. The error reporting module needs to do all necessary
+ * cleanup steps.
+ * The DASD_EER_TRIGGER notification sends the actual error reports (triggers).
+ */
+#define DASD_EER_DISABLE 0
+#define DASD_EER_TRIGGER 1
+
+/* Trigger IDs for extended error reporting DASD_EER_TRIGGER notification */
+#define DASD_EER_FATALERROR 1
+#define DASD_EER_NOPATH 2
+#define DASD_EER_STATECHANGE 3
+#define DASD_EER_PPRCSUSPEND 4
+#define DASD_EER_NOSPC 5
+
+/* DASD path handling */
+
+#define DASD_PATH_OPERATIONAL 1
+#define DASD_PATH_TBV 2
+#define DASD_PATH_PP 3
+#define DASD_PATH_NPP 4
+#define DASD_PATH_MISCABLED 5
+#define DASD_PATH_NOHPF 6
+#define DASD_PATH_CUIR 7
+#define DASD_PATH_IFCC 8
+#define DASD_PATH_FCSEC 9
+
+#define DASD_THRHLD_MAX 4294967295U
+#define DASD_INTERVAL_MAX 4294967295U
+
+/* FC Endpoint Security Capabilities */
+#define DASD_FC_SECURITY_UNSUP 0
+#define DASD_FC_SECURITY_AUTH 1
+#define DASD_FC_SECURITY_ENC_FCSP2 2
+#define DASD_FC_SECURITY_ENC_ERAS 3
+
+#define DASD_FC_SECURITY_ENC_STR "Encryption"
+static const struct {
+ u8 value;
+ char *name;
+} dasd_path_fcs_mnemonics[] = {
+ { DASD_FC_SECURITY_UNSUP, "Unsupported" },
+ { DASD_FC_SECURITY_AUTH, "Authentication" },
+ { DASD_FC_SECURITY_ENC_FCSP2, DASD_FC_SECURITY_ENC_STR },
+ { 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_copy_relation *copy;
+};
+
+struct dasd_block {
+ /* Block device stuff. */
+ struct gendisk *gdp;
+ 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;
+ atomic_t trkcount;
+};
+
+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_PPRC 32 /* PPRC swap */
+#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 *);
+
+/*
+ * return values to be returned from the copy pair swap function
+ * 0x00: swap successful
+ * 0x01: swap data invalid
+ * 0x02: no active device found
+ * 0x03: wrong primary specified
+ * 0x04: secondary device not found
+ * 0x05: swap already running
+ */
+#define DASD_COPYPAIRSWAP_SUCCESS 0
+#define DASD_COPYPAIRSWAP_INVALID 1
+#define DASD_COPYPAIRSWAP_NOACTIVE 2
+#define DASD_COPYPAIRSWAP_PRIMARY 3
+#define DASD_COPYPAIRSWAP_SECONDARY 4
+#define DASD_COPYPAIRSWAP_MULTIPLE 5
+
+/*
+ * 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;
+}
+
+/*
+ * return the callback data of the original request in case there are
+ * ERP requests build on top of it
+ */
+static inline void *dasd_get_callback_data(struct dasd_ccw_req *cqr)
+{
+ while (cqr->refers)
+ cqr = cqr->refers;
+
+ return cqr->callback_data;
+}
+
+/* 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 blk_mq_ops dasd_mq_ops;
+
+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);
+
+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_requeue_all_requests(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);
+
+extern const struct attribute_group *dasd_dev_groups[];
+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(unsigned int, 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);
+}
+
+static inline void dasd_path_add_fcsecpm(struct dasd_device *device, __u8 pm)
+{
+ int chp;
+
+ for (chp = 0; chp < 8; chp++)
+ if (pm & (0x80 >> chp))
+ dasd_path_fcsec(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 */