| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Copyright IBM Corp. 2007, 2010 |
| 4 | * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef S390_CHP_H |
| 8 | #define S390_CHP_H |
| 9 | |
| 10 | #include <linux/types.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include <asm/chpid.h> |
| 14 | #include "chsc.h" |
| 15 | #include "css.h" |
| 16 | |
| 17 | #define CHP_STATUS_STANDBY 0 |
| 18 | #define CHP_STATUS_CONFIGURED 1 |
| 19 | #define CHP_STATUS_RESERVED 2 |
| 20 | #define CHP_STATUS_NOT_RECOGNIZED 3 |
| 21 | |
| 22 | #define CHP_ONLINE 0 |
| 23 | #define CHP_OFFLINE 1 |
| 24 | #define CHP_VARY_ON 2 |
| 25 | #define CHP_VARY_OFF 3 |
| 26 | |
| 27 | struct chp_link { |
| 28 | struct chp_id chpid; |
| 29 | u32 fla_mask; |
| 30 | u16 fla; |
| 31 | }; |
| 32 | |
| 33 | static inline int chp_test_bit(u8 *bitmap, int num) |
| 34 | { |
| 35 | int byte = num >> 3; |
| 36 | int mask = 128 >> (num & 7); |
| 37 | |
| 38 | return (bitmap[byte] & mask) ? 1 : 0; |
| 39 | } |
| 40 | |
| 41 | |
| 42 | struct channel_path { |
| 43 | struct device dev; |
| 44 | struct chp_id chpid; |
| 45 | struct mutex lock; /* Serialize access to below members. */ |
| 46 | int state; |
| 47 | struct channel_path_desc desc; |
| 48 | struct channel_path_desc_fmt1 desc_fmt1; |
| 49 | /* Channel-measurement related stuff: */ |
| 50 | int cmg; |
| 51 | int shared; |
| 52 | struct cmg_chars cmg_chars; |
| 53 | }; |
| 54 | |
| 55 | /* Return channel_path struct for given chpid. */ |
| 56 | static inline struct channel_path *chpid_to_chp(struct chp_id chpid) |
| 57 | { |
| 58 | return css_by_id(chpid.cssid)->chps[chpid.id]; |
| 59 | } |
| 60 | |
| 61 | int chp_get_status(struct chp_id chpid); |
| 62 | u8 chp_get_sch_opm(struct subchannel *sch); |
| 63 | int chp_is_registered(struct chp_id chpid); |
| 64 | struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid); |
| 65 | void chp_remove_cmg_attr(struct channel_path *chp); |
| 66 | int chp_add_cmg_attr(struct channel_path *chp); |
| 67 | int chp_update_desc(struct channel_path *chp); |
| 68 | int chp_new(struct chp_id chpid); |
| 69 | void chp_cfg_schedule(struct chp_id chpid, int configure); |
| 70 | void chp_cfg_cancel_deconfigure(struct chp_id chpid); |
| 71 | int chp_info_get_status(struct chp_id chpid); |
| 72 | int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *); |
| 73 | #endif /* S390_CHP_H */ |