diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/s390/cio/chp.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/s390/cio/chp.h b/drivers/s390/cio/chp.h new file mode 100644 index 000000000..20259f3fb --- /dev/null +++ b/drivers/s390/cio/chp.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 2007, 2010 + * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> + */ + +#ifndef S390_CHP_H +#define S390_CHP_H + +#include <linux/types.h> +#include <linux/device.h> +#include <linux/mutex.h> +#include <asm/chpid.h> +#include "chsc.h" +#include "css.h" + +#define CHP_STATUS_STANDBY 0 +#define CHP_STATUS_CONFIGURED 1 +#define CHP_STATUS_RESERVED 2 +#define CHP_STATUS_NOT_RECOGNIZED 3 + +#define CHP_ONLINE 0 +#define CHP_OFFLINE 1 +#define CHP_VARY_ON 2 +#define CHP_VARY_OFF 3 + +struct chp_link { + struct chp_id chpid; + u32 fla_mask; + u16 fla; +}; + +static inline int chp_test_bit(u8 *bitmap, int num) +{ + int byte = num >> 3; + int mask = 128 >> (num & 7); + + return (bitmap[byte] & mask) ? 1 : 0; +} + + +struct channel_path { + struct device dev; + struct chp_id chpid; + struct mutex lock; /* Serialize access to below members. */ + int state; + struct channel_path_desc_fmt0 desc; + struct channel_path_desc_fmt1 desc_fmt1; + struct channel_path_desc_fmt3 desc_fmt3; + /* Channel-measurement related stuff: */ + int cmg; + int shared; + struct cmg_chars cmg_chars; +}; + +/* Return channel_path struct for given chpid. */ +static inline struct channel_path *chpid_to_chp(struct chp_id chpid) +{ + return css_by_id(chpid.cssid)->chps[chpid.id]; +} + +int chp_get_status(struct chp_id chpid); +u8 chp_get_sch_opm(struct subchannel *sch); +int chp_is_registered(struct chp_id chpid); +struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid); +void chp_remove_cmg_attr(struct channel_path *chp); +int chp_add_cmg_attr(struct channel_path *chp); +int chp_update_desc(struct channel_path *chp); +int chp_new(struct chp_id chpid); +void chp_cfg_schedule(struct chp_id chpid, int configure); +void chp_cfg_cancel_deconfigure(struct chp_id chpid); +int chp_info_get_status(struct chp_id chpid); +int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); +#endif /* S390_CHP_H */ |