187 lines
5.5 KiB
C
187 lines
5.5 KiB
C
#ifndef _CSS_H
|
|
#define _CSS_H
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <asm/cio.h>
|
|
|
|
#include "schid.h"
|
|
|
|
/*
|
|
* path grouping stuff
|
|
*/
|
|
#define SPID_FUNC_SINGLE_PATH 0x00
|
|
#define SPID_FUNC_MULTI_PATH 0x80
|
|
#define SPID_FUNC_ESTABLISH 0x00
|
|
#define SPID_FUNC_RESIGN 0x40
|
|
#define SPID_FUNC_DISBAND 0x20
|
|
|
|
#define SNID_STATE1_RESET 0
|
|
#define SNID_STATE1_UNGROUPED 2
|
|
#define SNID_STATE1_GROUPED 3
|
|
|
|
#define SNID_STATE2_NOT_RESVD 0
|
|
#define SNID_STATE2_RESVD_ELSE 2
|
|
#define SNID_STATE2_RESVD_SELF 3
|
|
|
|
#define SNID_STATE3_MULTI_PATH 1
|
|
#define SNID_STATE3_SINGLE_PATH 0
|
|
|
|
struct path_state {
|
|
__u8 state1 : 2; /* path state value 1 */
|
|
__u8 state2 : 2; /* path state value 2 */
|
|
__u8 state3 : 1; /* path state value 3 */
|
|
__u8 resvd : 3; /* reserved */
|
|
} __attribute__ ((packed));
|
|
|
|
struct extended_cssid {
|
|
u8 version;
|
|
u8 cssid;
|
|
} __attribute__ ((packed));
|
|
|
|
struct pgid {
|
|
union {
|
|
__u8 fc; /* SPID function code */
|
|
struct path_state ps; /* SNID path state */
|
|
} inf;
|
|
union {
|
|
__u32 cpu_addr : 16; /* CPU address */
|
|
struct extended_cssid ext_cssid;
|
|
} pgid_high;
|
|
__u32 cpu_id : 24; /* CPU identification */
|
|
__u32 cpu_model : 16; /* CPU model */
|
|
__u32 tod_high; /* high word TOD clock */
|
|
} __attribute__ ((packed));
|
|
|
|
#define MAX_CIWS 8
|
|
|
|
/*
|
|
* sense-id response buffer layout
|
|
*/
|
|
struct senseid {
|
|
/* common part */
|
|
__u8 reserved; /* always 0x'FF' */
|
|
__u16 cu_type; /* control unit type */
|
|
__u8 cu_model; /* control unit model */
|
|
__u16 dev_type; /* device type */
|
|
__u8 dev_model; /* device model */
|
|
__u8 unused; /* padding byte */
|
|
/* extended part */
|
|
struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
|
|
} __attribute__ ((packed,aligned(4)));
|
|
|
|
struct ccw_device_private {
|
|
int state; /* device state */
|
|
atomic_t onoff;
|
|
unsigned long registered;
|
|
__u16 devno; /* device number */
|
|
__u16 sch_no; /* subchannel number */
|
|
__u8 ssid; /* subchannel set id */
|
|
__u8 imask; /* lpm mask for SNID/SID/SPGID */
|
|
int iretry; /* retry counter SNID/SID/SPGID */
|
|
struct {
|
|
unsigned int fast:1; /* post with "channel end" */
|
|
unsigned int repall:1; /* report every interrupt status */
|
|
unsigned int pgroup:1; /* do path grouping */
|
|
unsigned int force:1; /* allow forced online */
|
|
} __attribute__ ((packed)) options;
|
|
struct {
|
|
unsigned int pgid_single:1; /* use single path for Set PGID */
|
|
unsigned int esid:1; /* Ext. SenseID supported by HW */
|
|
unsigned int dosense:1; /* delayed SENSE required */
|
|
unsigned int doverify:1; /* delayed path verification */
|
|
unsigned int donotify:1; /* call notify function */
|
|
unsigned int recog_done:1; /* dev. recog. complete */
|
|
unsigned int fake_irb:1; /* deliver faked irb */
|
|
} __attribute__((packed)) flags;
|
|
unsigned long intparm; /* user interruption parameter */
|
|
struct qdio_irq *qdio_data;
|
|
struct irb irb; /* device status */
|
|
struct senseid senseid; /* SenseID info */
|
|
struct pgid pgid; /* path group ID */
|
|
struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
|
|
struct work_struct kick_work;
|
|
wait_queue_head_t wait_q;
|
|
struct timer_list timer;
|
|
void *cmb; /* measurement information */
|
|
struct list_head cmb_list; /* list of measured devices */
|
|
u64 cmb_start_time; /* clock value of cmb reset */
|
|
void *cmb_wait; /* deferred cmb enable/disable */
|
|
};
|
|
|
|
/*
|
|
* A css driver handles all subchannels of one type.
|
|
* Currently, we only care about I/O subchannels (type 0), these
|
|
* have a ccw_device connected to them.
|
|
*/
|
|
struct subchannel;
|
|
struct css_driver {
|
|
unsigned int subchannel_type;
|
|
struct device_driver drv;
|
|
void (*irq)(struct device *);
|
|
int (*notify)(struct device *, int);
|
|
void (*verify)(struct device *);
|
|
void (*termination)(struct device *);
|
|
int (*probe)(struct subchannel *);
|
|
int (*remove)(struct subchannel *);
|
|
void (*shutdown)(struct subchannel *);
|
|
};
|
|
|
|
/*
|
|
* all css_drivers have the css_bus_type
|
|
*/
|
|
extern struct bus_type css_bus_type;
|
|
extern struct css_driver io_subchannel_driver;
|
|
|
|
extern int css_probe_device(struct subchannel_id);
|
|
extern struct subchannel * get_subchannel_by_schid(struct subchannel_id);
|
|
extern int css_init_done;
|
|
extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
|
|
|
|
#define __MAX_SUBCHANNEL 65535
|
|
#define __MAX_SSID 3
|
|
#define __MAX_CHPID 255
|
|
#define __MAX_CSSID 0
|
|
|
|
struct channel_subsystem {
|
|
u8 cssid;
|
|
int valid;
|
|
struct channel_path *chps[__MAX_CHPID + 1];
|
|
struct device device;
|
|
struct pgid global_pgid;
|
|
struct mutex mutex;
|
|
/* channel measurement related */
|
|
int cm_enabled;
|
|
void *cub_addr1;
|
|
void *cub_addr2;
|
|
};
|
|
#define to_css(dev) container_of(dev, struct channel_subsystem, device)
|
|
|
|
extern struct bus_type css_bus_type;
|
|
extern struct channel_subsystem *css[];
|
|
|
|
/* Some helper functions for disconnected state. */
|
|
int device_is_disconnected(struct subchannel *);
|
|
void device_set_disconnected(struct subchannel *);
|
|
void device_trigger_reprobe(struct subchannel *);
|
|
|
|
/* Helper functions for vary on/off. */
|
|
int device_is_online(struct subchannel *);
|
|
void device_set_waiting(struct subchannel *);
|
|
|
|
/* Machine check helper function. */
|
|
void device_kill_pending_timer(struct subchannel *);
|
|
|
|
/* Helper functions to build lists for the slow path. */
|
|
extern int css_enqueue_subchannel_slow(struct subchannel_id schid);
|
|
void css_walk_subchannel_slow_list(void (*fn)(unsigned long));
|
|
void css_clear_subchannel_slow_list(void);
|
|
int css_slow_subchannels_exist(void);
|
|
extern int need_rescan;
|
|
|
|
extern struct workqueue_struct *slow_path_wq;
|
|
extern struct work_struct slow_path_work;
|
|
#endif
|