1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright IBM Corp. 2007, 2010 4*4882a593Smuzhiyun * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef S390_CHP_H 8*4882a593Smuzhiyun #define S390_CHP_H 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/types.h> 11*4882a593Smuzhiyun #include <linux/device.h> 12*4882a593Smuzhiyun #include <linux/mutex.h> 13*4882a593Smuzhiyun #include <asm/chpid.h> 14*4882a593Smuzhiyun #include "chsc.h" 15*4882a593Smuzhiyun #include "css.h" 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #define CHP_STATUS_STANDBY 0 18*4882a593Smuzhiyun #define CHP_STATUS_CONFIGURED 1 19*4882a593Smuzhiyun #define CHP_STATUS_RESERVED 2 20*4882a593Smuzhiyun #define CHP_STATUS_NOT_RECOGNIZED 3 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define CHP_ONLINE 0 23*4882a593Smuzhiyun #define CHP_OFFLINE 1 24*4882a593Smuzhiyun #define CHP_VARY_ON 2 25*4882a593Smuzhiyun #define CHP_VARY_OFF 3 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun struct chp_link { 28*4882a593Smuzhiyun struct chp_id chpid; 29*4882a593Smuzhiyun u32 fla_mask; 30*4882a593Smuzhiyun u16 fla; 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun chp_test_bit(u8 * bitmap,int num)33*4882a593Smuzhiyunstatic inline int chp_test_bit(u8 *bitmap, int num) 34*4882a593Smuzhiyun { 35*4882a593Smuzhiyun int byte = num >> 3; 36*4882a593Smuzhiyun int mask = 128 >> (num & 7); 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun return (bitmap[byte] & mask) ? 1 : 0; 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun struct channel_path { 43*4882a593Smuzhiyun struct device dev; 44*4882a593Smuzhiyun struct chp_id chpid; 45*4882a593Smuzhiyun struct mutex lock; /* Serialize access to below members. */ 46*4882a593Smuzhiyun int state; 47*4882a593Smuzhiyun struct channel_path_desc_fmt0 desc; 48*4882a593Smuzhiyun struct channel_path_desc_fmt1 desc_fmt1; 49*4882a593Smuzhiyun struct channel_path_desc_fmt3 desc_fmt3; 50*4882a593Smuzhiyun /* Channel-measurement related stuff: */ 51*4882a593Smuzhiyun int cmg; 52*4882a593Smuzhiyun int shared; 53*4882a593Smuzhiyun struct cmg_chars cmg_chars; 54*4882a593Smuzhiyun }; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun /* Return channel_path struct for given chpid. */ chpid_to_chp(struct chp_id chpid)57*4882a593Smuzhiyunstatic inline struct channel_path *chpid_to_chp(struct chp_id chpid) 58*4882a593Smuzhiyun { 59*4882a593Smuzhiyun return css_by_id(chpid.cssid)->chps[chpid.id]; 60*4882a593Smuzhiyun } 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun int chp_get_status(struct chp_id chpid); 63*4882a593Smuzhiyun u8 chp_get_sch_opm(struct subchannel *sch); 64*4882a593Smuzhiyun int chp_is_registered(struct chp_id chpid); 65*4882a593Smuzhiyun struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid); 66*4882a593Smuzhiyun void chp_remove_cmg_attr(struct channel_path *chp); 67*4882a593Smuzhiyun int chp_add_cmg_attr(struct channel_path *chp); 68*4882a593Smuzhiyun int chp_update_desc(struct channel_path *chp); 69*4882a593Smuzhiyun int chp_new(struct chp_id chpid); 70*4882a593Smuzhiyun void chp_cfg_schedule(struct chp_id chpid, int configure); 71*4882a593Smuzhiyun void chp_cfg_cancel_deconfigure(struct chp_id chpid); 72*4882a593Smuzhiyun int chp_info_get_status(struct chp_id chpid); 73*4882a593Smuzhiyun int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); 74*4882a593Smuzhiyun #endif /* S390_CHP_H */ 75