1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright IBM Corp. 2007, 2010 4 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 5 */ 6 7 #ifndef S390_CHP_H 8 #define S390_CHP_H 9 10 #include <linux/types.h> 11 #include <linux/device.h> 12 #include <linux/mutex.h> 13 #include <asm/chpid.h> 14 #include "chsc.h" 15 #include "css.h" 16 17 #define CHP_STATUS_STANDBY 0 18 #define CHP_STATUS_CONFIGURED 1 19 #define CHP_STATUS_RESERVED 2 20 #define CHP_STATUS_NOT_RECOGNIZED 3 21 22 #define CHP_ONLINE 0 23 #define CHP_OFFLINE 1 24 #define CHP_VARY_ON 2 25 #define CHP_VARY_OFF 3 26 #define CHP_FCES_EVENT 4 27 28 struct chp_link { 29 struct chp_id chpid; 30 u32 fla_mask; 31 u16 fla; 32 }; 33 34 static inline int chp_test_bit(u8 *bitmap, int num) 35 { 36 int byte = num >> 3; 37 int mask = 128 >> (num & 7); 38 39 return (bitmap[byte] & mask) ? 1 : 0; 40 } 41 42 43 struct channel_path { 44 struct device dev; 45 struct chp_id chpid; 46 struct mutex lock; /* Serialize access to below members. */ 47 int state; 48 struct channel_path_desc_fmt0 desc; 49 struct channel_path_desc_fmt1 desc_fmt1; 50 struct channel_path_desc_fmt3 desc_fmt3; 51 /* Channel-measurement related stuff: */ 52 int cmg; 53 int shared; 54 int extended; 55 unsigned long speed; 56 struct cmg_chars cmg_chars; 57 }; 58 59 /* Return channel_path struct for given chpid. */ 60 static inline struct channel_path *chpid_to_chp(struct chp_id chpid) 61 { 62 return css_by_id(chpid.cssid)->chps[chpid.id]; 63 } 64 65 int chp_get_status(struct chp_id chpid); 66 u8 chp_get_sch_opm(struct subchannel *sch); 67 int chp_is_registered(struct chp_id chpid); 68 struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid); 69 void chp_remove_cmg_attr(struct channel_path *chp); 70 int chp_add_cmg_attr(struct channel_path *chp); 71 int chp_update_desc(struct channel_path *chp); 72 int chp_new(struct chp_id chpid); 73 void chp_cfg_schedule(struct chp_id chpid, int configure); 74 void chp_cfg_cancel_deconfigure(struct chp_id chpid); 75 int chp_info_get_status(struct chp_id chpid); 76 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); 77 #endif /* S390_CHP_H */ 78