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 27struct chp_link { 28 struct chp_id chpid; 29 u32 fla_mask; 30 u16 fla; 31}; 32 33static inline int chp_test_bit(u8 *bitmap, int num) 34{ 35 int byte = num >> 3; 36 int mask = 128 >> (num & 7); 37 38 return (bitmap[byte] & mask) ? 1 : 0; 39} 40 41 42struct channel_path { 43 struct device dev; 44 struct chp_id chpid; 45 struct mutex lock; /* Serialize access to below members. */ 46 int state; 47 struct channel_path_desc_fmt0 desc; 48 struct channel_path_desc_fmt1 desc_fmt1; 49 struct channel_path_desc_fmt3 desc_fmt3; 50 /* Channel-measurement related stuff: */ 51 int cmg; 52 int shared; 53 struct cmg_chars cmg_chars; 54}; 55 56/* Return channel_path struct for given chpid. */ 57static inline struct channel_path *chpid_to_chp(struct chp_id chpid) 58{ 59 return css_by_id(chpid.cssid)->chps[chpid.id]; 60} 61 62int chp_get_status(struct chp_id chpid); 63u8 chp_get_sch_opm(struct subchannel *sch); 64int chp_is_registered(struct chp_id chpid); 65struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid); 66void chp_remove_cmg_attr(struct channel_path *chp); 67int chp_add_cmg_attr(struct channel_path *chp); 68int chp_update_desc(struct channel_path *chp); 69int chp_new(struct chp_id chpid); 70void chp_cfg_schedule(struct chp_id chpid, int configure); 71void chp_cfg_cancel_deconfigure(struct chp_id chpid); 72int chp_info_get_status(struct chp_id chpid); 73int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); 74#endif /* S390_CHP_H */ 75