83b3370c79
Use a bitmap for indicating which subchannels require evaluation instead of allocating memory for each evaluation request. This approach reduces memory consumption during recovery in case of massive evaluation request occurrence and removes the need for memory allocation failure handling. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
/*
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* drivers/s390/cio/chp.h
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*
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* Copyright IBM Corp. 2007
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* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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*/
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#ifndef S390_CHP_H
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#define S390_CHP_H S390_CHP_H
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#include <linux/types.h>
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#include <linux/device.h>
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#include <asm/chpid.h>
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#include "chsc.h"
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#define CHP_STATUS_STANDBY 0
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#define CHP_STATUS_CONFIGURED 1
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#define CHP_STATUS_RESERVED 2
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#define CHP_STATUS_NOT_RECOGNIZED 3
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static inline int chp_test_bit(u8 *bitmap, int num)
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{
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int byte = num >> 3;
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int mask = 128 >> (num & 7);
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return (bitmap[byte] & mask) ? 1 : 0;
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}
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struct channel_path {
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struct chp_id chpid;
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int state;
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struct channel_path_desc desc;
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/* Channel-measurement related stuff: */
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int cmg;
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int shared;
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void *cmg_chars;
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struct device dev;
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};
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int chp_get_status(struct chp_id chpid);
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u8 chp_get_sch_opm(struct subchannel *sch);
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int chp_is_registered(struct chp_id chpid);
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void *chp_get_chp_desc(struct chp_id chpid);
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void chp_process_crw(int id, int available);
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void chp_remove_cmg_attr(struct channel_path *chp);
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int chp_add_cmg_attr(struct channel_path *chp);
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int chp_new(struct chp_id chpid);
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void chp_cfg_schedule(struct chp_id chpid, int configure);
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void chp_cfg_cancel_deconfigure(struct chp_id chpid);
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int chp_info_get_status(struct chp_id chpid);
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#endif /* S390_CHP_H */
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