include/asm-s390/ccwdev.h

   1 /*
   2  *  include/asm-s390/ccwdev.h
   3  *  include/asm-s390x/ccwdev.h
   4  *
   5  *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
   6  *    Author(s): Arnd Bergmann <arndb@de.ibm.com>
   7  *
   8  *  Interface for CCW device drivers
   9  */
  10 #ifndef _S390_CCWDEV_H_
  11 #define _S390_CCWDEV_H_
  12
  13 #include <linux/device.h>
  14 #include <linux/mod_devicetable.h>
  15
  16 /* structs from asm/cio.h */
  17 struct irb;
  18 struct ccw1;
  19 struct ccw_dev_id;
  20
  21 /* simplified initializers for struct ccw_device:
  22  * CCW_DEVICE and CCW_DEVICE_DEVTYPE initialize one
  23  * entry in your MODULE_DEVICE_TABLE and set the match_flag correctly */
  24 #define CCW_DEVICE(cu, cum)                                             \
  25         .cu_type=(cu), .cu_model=(cum),                                 \
  26         .match_flags=(CCW_DEVICE_ID_MATCH_CU_TYPE                       \
  27                    | (cum ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0))
  28
  29 #define CCW_DEVICE_DEVTYPE(cu, cum, dev, devm)                          \
  30         .cu_type=(cu), .cu_model=(cum), .dev_type=(dev), .dev_model=(devm),\
  31         .match_flags=CCW_DEVICE_ID_MATCH_CU_TYPE                        \
  32                    | ((cum) ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0)         \
  33                    | CCW_DEVICE_ID_MATCH_DEVICE_TYPE                    \
  34                    | ((devm) ? CCW_DEVICE_ID_MATCH_DEVICE_MODEL : 0)
  35
  36 /* scan through an array of device ids and return the first
  37  * entry that matches the device.
  38  *
  39  * the array must end with an entry containing zero match_flags
  40  */
  41 static inline const struct ccw_device_id *
  42 ccw_device_id_match(const struct ccw_device_id *array,
  43                         const struct ccw_device_id *match)
  44 {
  45         const struct ccw_device_id *id = array;
  46
  47         for (id = array; id->match_flags; id++) {
  48                 if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_TYPE)
  49                     && (id->cu_type != match->cu_type))
  50                         continue;
  51
  52                 if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_MODEL)
  53                     && (id->cu_model != match->cu_model))
  54                         continue;
  55
  56                 if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_TYPE)
  57                     && (id->dev_type != match->dev_type))
  58                         continue;
  59
  60                 if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_MODEL)
  61                     && (id->dev_model != match->dev_model))
  62                         continue;
  63
  64                 return id;
  65         }
  66
  67         return NULL;
  68 }
  69
  70 /**
  71  * struct ccw_device - channel attached device
  72  * @ccwlock: pointer to device lock
  73  * @id: id of this device
  74  * @drv: ccw driver for this device
  75  * @dev: embedded device structure
  76  * @online: online status of device
  77  * @handler: interrupt handler
  78  *
  79  * @handler is a member of the device rather than the driver since a driver
  80  * can have different interrupt handlers for different ccw devices
  81  * (multi-subchannel drivers).
  82  */
  83 struct ccw_device {
  84         spinlock_t *ccwlock;
  85 /* private: */
  86         struct ccw_device_private *private;     /* cio private information */
  87 /* public: */
  88         struct ccw_device_id id;
  89         struct ccw_driver *drv;
  90         struct device dev;
  91         int online;
  92         void (*handler) (struct ccw_device *, unsigned long, struct irb *);
  93 };
  94
  95
  96 /**
  97  * struct ccw driver - device driver for channel attached devices
  98  * @owner: owning module
  99  * @ids: ids supported by this driver
 100  * @probe: function called on probe
 101  * @remove: function called on remove
 102  * @set_online: called when setting device online
 103  * @set_offline: called when setting device offline
 104  * @notify: notify driver of device state changes
 105  * @shutdown: called at device shutdown
 106  * @driver: embedded device driver structure
 107  * @name: device driver name
 108  */
 109 struct ccw_driver {
 110         struct module *owner;
 111         struct ccw_device_id *ids;
 112         int (*probe) (struct ccw_device *);
 113         void (*remove) (struct ccw_device *);
 114         int (*set_online) (struct ccw_device *);
 115         int (*set_offline) (struct ccw_device *);
 116         int (*notify) (struct ccw_device *, int);
 117         void (*shutdown) (struct ccw_device *);
 118         struct device_driver driver;
 119         char *name;
 120 };
 121
 122 extern struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv,
 123                                               const char *bus_id);
 124
 125 /* devices drivers call these during module load and unload.
 126  * When a driver is registered, its probe method is called
 127  * when new devices for its type pop up */
 128 extern int  ccw_driver_register   (struct ccw_driver *driver);
 129 extern void ccw_driver_unregister (struct ccw_driver *driver);
 130
 131 struct ccw1;
 132
 133 extern int ccw_device_set_options_mask(struct ccw_device *, unsigned long);
 134 extern int ccw_device_set_options(struct ccw_device *, unsigned long);
 135 extern void ccw_device_clear_options(struct ccw_device *, unsigned long);
 136
 137 /* Allow for i/o completion notification after primary interrupt status. */
 138 #define CCWDEV_EARLY_NOTIFICATION       0x0001
 139 /* Report all interrupt conditions. */
 140 #define CCWDEV_REPORT_ALL               0x0002
 141 /* Try to perform path grouping. */
 142 #define CCWDEV_DO_PATHGROUP             0x0004
 143 /* Allow forced onlining of boxed devices. */
 144 #define CCWDEV_ALLOW_FORCE              0x0008
 145
 146 extern int ccw_device_start(struct ccw_device *, struct ccw1 *,
 147                             unsigned long, __u8, unsigned long);
 148 extern int ccw_device_start_timeout(struct ccw_device *, struct ccw1 *,
 149                                     unsigned long, __u8, unsigned long, int);
 150 extern int ccw_device_start_key(struct ccw_device *, struct ccw1 *,
 151                                 unsigned long, __u8, __u8, unsigned long);
 152 extern int ccw_device_start_timeout_key(struct ccw_device *, struct ccw1 *,
 153                                         unsigned long, __u8, __u8,
 154                                         unsigned long, int);
 155
 156
 157 extern int ccw_device_resume(struct ccw_device *);
 158 extern int ccw_device_halt(struct ccw_device *, unsigned long);
 159 extern int ccw_device_clear(struct ccw_device *, unsigned long);
 160
 161 extern int ccw_device_set_online(struct ccw_device *cdev);
 162 extern int ccw_device_set_offline(struct ccw_device *cdev);
 163
 164
 165 extern struct ciw *ccw_device_get_ciw(struct ccw_device *, __u32 cmd);
 166 extern __u8 ccw_device_get_path_mask(struct ccw_device *);
 167 extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *);
 168
 169 #define get_ccwdev_lock(x) (x)->ccwlock
 170
 171 #define to_ccwdev(n) container_of(n, struct ccw_device, dev)
 172 #define to_ccwdrv(n) container_of(n, struct ccw_driver, driver)
 173
 174 extern struct ccw_device *ccw_device_probe_console(void);
 175
 176 // FIXME: these have to go
 177 extern int _ccw_device_get_subchannel_number(struct ccw_device *);
 178
 179 extern void *ccw_device_get_chp_desc(struct ccw_device *, int);
 180 #endif /* _S390_CCWDEV_H_ */