| #ifndef _CSS_H |
| #define _CSS_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]; |
| struct device device; |
| struct pgid global_pgid; |
| }; |
| #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 |