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1da177e4 LT |
1 | #ifndef _CSS_H |
2 | #define _CSS_H | |
3 | ||
495a5b45 | 4 | #include <linux/mutex.h> |
1da177e4 LT |
5 | #include <linux/wait.h> |
6 | #include <linux/workqueue.h> | |
e6b6e10a | 7 | #include <linux/device.h> |
e5854a58 | 8 | #include <linux/types.h> |
1da177e4 LT |
9 | |
10 | #include <asm/cio.h> | |
e5854a58 | 11 | #include <asm/chpid.h> |
1da177e4 | 12 | |
a8237fc4 CH |
13 | #include "schid.h" |
14 | ||
1da177e4 LT |
15 | /* |
16 | * path grouping stuff | |
17 | */ | |
18 | #define SPID_FUNC_SINGLE_PATH 0x00 | |
19 | #define SPID_FUNC_MULTI_PATH 0x80 | |
20 | #define SPID_FUNC_ESTABLISH 0x00 | |
21 | #define SPID_FUNC_RESIGN 0x40 | |
22 | #define SPID_FUNC_DISBAND 0x20 | |
23 | ||
24 | #define SNID_STATE1_RESET 0 | |
25 | #define SNID_STATE1_UNGROUPED 2 | |
26 | #define SNID_STATE1_GROUPED 3 | |
27 | ||
28 | #define SNID_STATE2_NOT_RESVD 0 | |
29 | #define SNID_STATE2_RESVD_ELSE 2 | |
30 | #define SNID_STATE2_RESVD_SELF 3 | |
31 | ||
32 | #define SNID_STATE3_MULTI_PATH 1 | |
33 | #define SNID_STATE3_SINGLE_PATH 0 | |
34 | ||
35 | struct path_state { | |
36 | __u8 state1 : 2; /* path state value 1 */ | |
37 | __u8 state2 : 2; /* path state value 2 */ | |
38 | __u8 state3 : 1; /* path state value 3 */ | |
39 | __u8 resvd : 3; /* reserved */ | |
40 | } __attribute__ ((packed)); | |
41 | ||
a28c6944 CH |
42 | struct extended_cssid { |
43 | u8 version; | |
44 | u8 cssid; | |
45 | } __attribute__ ((packed)); | |
46 | ||
1da177e4 LT |
47 | struct pgid { |
48 | union { | |
49 | __u8 fc; /* SPID function code */ | |
50 | struct path_state ps; /* SNID path state */ | |
4ae9538d | 51 | } __attribute__ ((packed)) inf; |
a28c6944 CH |
52 | union { |
53 | __u32 cpu_addr : 16; /* CPU address */ | |
54 | struct extended_cssid ext_cssid; | |
4ae9538d | 55 | } __attribute__ ((packed)) pgid_high; |
1da177e4 LT |
56 | __u32 cpu_id : 24; /* CPU identification */ |
57 | __u32 cpu_model : 16; /* CPU model */ | |
58 | __u32 tod_high; /* high word TOD clock */ | |
59 | } __attribute__ ((packed)); | |
60 | ||
1da177e4 LT |
61 | #define MAX_CIWS 8 |
62 | ||
63 | /* | |
64 | * sense-id response buffer layout | |
65 | */ | |
66 | struct senseid { | |
67 | /* common part */ | |
68 | __u8 reserved; /* always 0x'FF' */ | |
69 | __u16 cu_type; /* control unit type */ | |
70 | __u8 cu_model; /* control unit model */ | |
71 | __u16 dev_type; /* device type */ | |
72 | __u8 dev_model; /* device model */ | |
73 | __u8 unused; /* padding byte */ | |
74 | /* extended part */ | |
75 | struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ | |
76 | } __attribute__ ((packed,aligned(4))); | |
77 | ||
78 | struct ccw_device_private { | |
c1637532 MS |
79 | struct ccw_device *cdev; |
80 | struct subchannel *sch; | |
1da177e4 LT |
81 | int state; /* device state */ |
82 | atomic_t onoff; | |
83 | unsigned long registered; | |
78964268 CH |
84 | struct ccw_dev_id dev_id; /* device id */ |
85 | struct subchannel_id schid; /* subchannel number */ | |
1da177e4 LT |
86 | __u8 imask; /* lpm mask for SNID/SID/SPGID */ |
87 | int iretry; /* retry counter SNID/SID/SPGID */ | |
88 | struct { | |
89 | unsigned int fast:1; /* post with "channel end" */ | |
90 | unsigned int repall:1; /* report every interrupt status */ | |
91 | unsigned int pgroup:1; /* do path grouping */ | |
92 | unsigned int force:1; /* allow forced online */ | |
93 | } __attribute__ ((packed)) options; | |
94 | struct { | |
95 | unsigned int pgid_single:1; /* use single path for Set PGID */ | |
96 | unsigned int esid:1; /* Ext. SenseID supported by HW */ | |
97 | unsigned int dosense:1; /* delayed SENSE required */ | |
98 | unsigned int doverify:1; /* delayed path verification */ | |
99 | unsigned int donotify:1; /* call notify function */ | |
100 | unsigned int recog_done:1; /* dev. recog. complete */ | |
101 | unsigned int fake_irb:1; /* deliver faked irb */ | |
d23861ff | 102 | unsigned int intretry:1; /* retry internal operation */ |
1da177e4 LT |
103 | } __attribute__((packed)) flags; |
104 | unsigned long intparm; /* user interruption parameter */ | |
105 | struct qdio_irq *qdio_data; | |
106 | struct irb irb; /* device status */ | |
107 | struct senseid senseid; /* SenseID info */ | |
7e560814 | 108 | struct pgid pgid[8]; /* path group IDs per chpid*/ |
1da177e4 LT |
109 | struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ |
110 | struct work_struct kick_work; | |
111 | wait_queue_head_t wait_q; | |
112 | struct timer_list timer; | |
113 | void *cmb; /* measurement information */ | |
114 | struct list_head cmb_list; /* list of measured devices */ | |
115 | u64 cmb_start_time; /* clock value of cmb reset */ | |
116 | void *cmb_wait; /* deferred cmb enable/disable */ | |
117 | }; | |
118 | ||
119 | /* | |
120 | * A css driver handles all subchannels of one type. | |
121 | * Currently, we only care about I/O subchannels (type 0), these | |
122 | * have a ccw_device connected to them. | |
123 | */ | |
8bbace7e | 124 | struct subchannel; |
1da177e4 LT |
125 | struct css_driver { |
126 | unsigned int subchannel_type; | |
127 | struct device_driver drv; | |
128 | void (*irq)(struct device *); | |
129 | int (*notify)(struct device *, int); | |
130 | void (*verify)(struct device *); | |
131 | void (*termination)(struct device *); | |
8bbace7e CH |
132 | int (*probe)(struct subchannel *); |
133 | int (*remove)(struct subchannel *); | |
134 | void (*shutdown)(struct subchannel *); | |
1da177e4 LT |
135 | }; |
136 | ||
137 | /* | |
138 | * all css_drivers have the css_bus_type | |
139 | */ | |
140 | extern struct bus_type css_bus_type; | |
1da177e4 | 141 | |
6ab4879a | 142 | extern void css_sch_device_unregister(struct subchannel *); |
a8237fc4 | 143 | extern struct subchannel * get_subchannel_by_schid(struct subchannel_id); |
1da177e4 | 144 | extern int css_init_done; |
f97a56fb | 145 | extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *); |
83b3370c | 146 | extern void css_process_crw(int, int); |
2b67fc46 | 147 | extern void css_reiterate_subchannels(void); |
7ad6a249 | 148 | void css_update_ssd_info(struct subchannel *sch); |
1da177e4 | 149 | |
a8237fc4 | 150 | #define __MAX_SUBCHANNEL 65535 |
fb6958a5 | 151 | #define __MAX_SSID 3 |
a28c6944 CH |
152 | |
153 | struct channel_subsystem { | |
154 | u8 cssid; | |
155 | int valid; | |
871931c1 | 156 | struct channel_path *chps[__MAX_CHPID + 1]; |
a28c6944 CH |
157 | struct device device; |
158 | struct pgid global_pgid; | |
495a5b45 CH |
159 | struct mutex mutex; |
160 | /* channel measurement related */ | |
161 | int cm_enabled; | |
162 | void *cub_addr1; | |
163 | void *cub_addr2; | |
d7b5a4c9 CH |
164 | /* for orphaned ccw devices */ |
165 | struct subchannel *pseudo_subchannel; | |
a28c6944 CH |
166 | }; |
167 | #define to_css(dev) container_of(dev, struct channel_subsystem, device) | |
1da177e4 LT |
168 | |
169 | extern struct bus_type css_bus_type; | |
a28c6944 | 170 | extern struct channel_subsystem *css[]; |
1da177e4 LT |
171 | |
172 | /* Some helper functions for disconnected state. */ | |
173 | int device_is_disconnected(struct subchannel *); | |
174 | void device_set_disconnected(struct subchannel *); | |
175 | void device_trigger_reprobe(struct subchannel *); | |
176 | ||
177 | /* Helper functions for vary on/off. */ | |
178 | int device_is_online(struct subchannel *); | |
e7769b48 | 179 | void device_kill_io(struct subchannel *); |
d23861ff | 180 | void device_set_intretry(struct subchannel *sch); |
24cb5b48 | 181 | int device_trigger_verify(struct subchannel *sch); |
1da177e4 LT |
182 | |
183 | /* Machine check helper function. */ | |
184 | void device_kill_pending_timer(struct subchannel *); | |
185 | ||
186 | /* Helper functions to build lists for the slow path. */ | |
83b3370c PO |
187 | void css_schedule_eval(struct subchannel_id schid); |
188 | void css_schedule_eval_all(void); | |
1da177e4 | 189 | |
d7b5a4c9 CH |
190 | int sch_is_pseudo_sch(struct subchannel *); |
191 | ||
1da177e4 | 192 | extern struct workqueue_struct *slow_path_wq; |
7674da77 CH |
193 | |
194 | int subchannel_add_files (struct device *); | |
529192f3 | 195 | extern struct attribute_group *subch_attr_groups[]; |
1da177e4 | 196 | #endif |