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Currently the cssid in various structures is used as the id of the respective channel subsystem. Sometimes however we call the index in the channel_subsystems array cssid. In some places the id is even used as the index. Provide a new define MAX_CSS_IDX and use it where appropriate. In addition to that provide a dummy function to find a channel subsystem by its id and a macro to iterate over the channel subsystems. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* Copyright IBM Corp. 2007, 2010
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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
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#include <linux/types.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <asm/chpid.h>
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#include "chsc.h"
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#include "css.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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#define CHP_ONLINE 0
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#define CHP_OFFLINE 1
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#define CHP_VARY_ON 2
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#define CHP_VARY_OFF 3
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struct chp_link {
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struct chp_id chpid;
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u32 fla_mask;
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u16 fla;
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};
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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 device dev;
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struct chp_id chpid;
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struct mutex lock; /* Serialize access to below members. */
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int state;
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struct channel_path_desc desc;
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struct channel_path_desc_fmt1 desc_fmt1;
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/* Channel-measurement related stuff: */
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int cmg;
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int shared;
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struct cmg_chars cmg_chars;
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};
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/* Return channel_path struct for given chpid. */
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static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
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{
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return css_by_id(chpid.cssid)->chps[chpid.id];
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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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struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
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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_update_desc(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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int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
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#endif /* S390_CHP_H */
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