1 /* 2 * Copyright IBM Corp. 2007, 2010 3 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 4 */ 5 6 #ifndef S390_CHP_H 7 #define S390_CHP_H 8 9 #include <linux/types.h> 10 #include <linux/device.h> 11 #include <linux/mutex.h> 12 #include <asm/chpid.h> 13 #include "chsc.h" 14 #include "css.h" 15 16 #define CHP_STATUS_STANDBY 0 17 #define CHP_STATUS_CONFIGURED 1 18 #define CHP_STATUS_RESERVED 2 19 #define CHP_STATUS_NOT_RECOGNIZED 3 20 21 #define CHP_ONLINE 0 22 #define CHP_OFFLINE 1 23 #define CHP_VARY_ON 2 24 #define CHP_VARY_OFF 3 25 26 struct chp_link { 27 struct chp_id chpid; 28 u32 fla_mask; 29 u16 fla; 30 }; 31 32 static inline int chp_test_bit(u8 *bitmap, int num) 33 { 34 int byte = num >> 3; 35 int mask = 128 >> (num & 7); 36 37 return (bitmap[byte] & mask) ? 1 : 0; 38 } 39 40 41 struct channel_path { 42 struct device dev; 43 struct chp_id chpid; 44 struct mutex lock; /* Serialize access to below members. */ 45 int state; 46 struct channel_path_desc desc; 47 struct channel_path_desc_fmt1 desc_fmt1; 48 /* Channel-measurement related stuff: */ 49 int cmg; 50 int shared; 51 struct cmg_chars cmg_chars; 52 }; 53 54 /* Return channel_path struct for given chpid. */ 55 static inline struct channel_path *chpid_to_chp(struct chp_id chpid) 56 { 57 return channel_subsystems[chpid.cssid]->chps[chpid.id]; 58 } 59 60 int chp_get_status(struct chp_id chpid); 61 u8 chp_get_sch_opm(struct subchannel *sch); 62 int chp_is_registered(struct chp_id chpid); 63 struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid); 64 void chp_remove_cmg_attr(struct channel_path *chp); 65 int chp_add_cmg_attr(struct channel_path *chp); 66 int chp_update_desc(struct channel_path *chp); 67 int chp_new(struct chp_id chpid); 68 void chp_cfg_schedule(struct chp_id chpid, int configure); 69 void chp_cfg_cancel_deconfigure(struct chp_id chpid); 70 int chp_info_get_status(struct chp_id chpid); 71 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); 72 #endif /* S390_CHP_H */ 73