18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Copyright IBM Corp. 2007, 2012 48c2ecf20Sopenharmony_ci * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> 58c2ecf20Sopenharmony_ci */ 68c2ecf20Sopenharmony_ci#ifndef _ASM_S390_CHPID_H 78c2ecf20Sopenharmony_ci#define _ASM_S390_CHPID_H 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#include <uapi/asm/chpid.h> 108c2ecf20Sopenharmony_ci#include <asm/cio.h> 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_cistruct channel_path_desc_fmt0 { 138c2ecf20Sopenharmony_ci u8 flags; 148c2ecf20Sopenharmony_ci u8 lsn; 158c2ecf20Sopenharmony_ci u8 desc; 168c2ecf20Sopenharmony_ci u8 chpid; 178c2ecf20Sopenharmony_ci u8 swla; 188c2ecf20Sopenharmony_ci u8 zeroes; 198c2ecf20Sopenharmony_ci u8 chla; 208c2ecf20Sopenharmony_ci u8 chpp; 218c2ecf20Sopenharmony_ci} __packed; 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_cistatic inline void chp_id_init(struct chp_id *chpid) 248c2ecf20Sopenharmony_ci{ 258c2ecf20Sopenharmony_ci memset(chpid, 0, sizeof(struct chp_id)); 268c2ecf20Sopenharmony_ci} 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_cistatic inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b) 298c2ecf20Sopenharmony_ci{ 308c2ecf20Sopenharmony_ci return (a->id == b->id) && (a->cssid == b->cssid); 318c2ecf20Sopenharmony_ci} 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_cistatic inline void chp_id_next(struct chp_id *chpid) 348c2ecf20Sopenharmony_ci{ 358c2ecf20Sopenharmony_ci if (chpid->id < __MAX_CHPID) 368c2ecf20Sopenharmony_ci chpid->id++; 378c2ecf20Sopenharmony_ci else { 388c2ecf20Sopenharmony_ci chpid->id = 0; 398c2ecf20Sopenharmony_ci chpid->cssid++; 408c2ecf20Sopenharmony_ci } 418c2ecf20Sopenharmony_ci} 428c2ecf20Sopenharmony_ci 438c2ecf20Sopenharmony_cistatic inline int chp_id_is_valid(struct chp_id *chpid) 448c2ecf20Sopenharmony_ci{ 458c2ecf20Sopenharmony_ci return (chpid->cssid <= __MAX_CSSID); 468c2ecf20Sopenharmony_ci} 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ci#define chp_id_for_each(c) \ 508c2ecf20Sopenharmony_ci for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c)) 518c2ecf20Sopenharmony_ci#endif /* _ASM_S390_CHPID_H */ 52