4 #include <linux/wait.h>
5 #include <linux/workqueue.h>
14 #define SPID_FUNC_SINGLE_PATH 0x00
15 #define SPID_FUNC_MULTI_PATH 0x80
16 #define SPID_FUNC_ESTABLISH 0x00
17 #define SPID_FUNC_RESIGN 0x40
18 #define SPID_FUNC_DISBAND 0x20
20 #define SNID_STATE1_RESET 0
21 #define SNID_STATE1_UNGROUPED 2
22 #define SNID_STATE1_GROUPED 3
24 #define SNID_STATE2_NOT_RESVD 0
25 #define SNID_STATE2_RESVD_ELSE 2
26 #define SNID_STATE2_RESVD_SELF 3
28 #define SNID_STATE3_MULTI_PATH 1
29 #define SNID_STATE3_SINGLE_PATH 0
32 __u8 state1 : 2; /* path state value 1 */
33 __u8 state2 : 2; /* path state value 2 */
34 __u8 state3 : 1; /* path state value 3 */
35 __u8 resvd : 3; /* reserved */
36 } __attribute__ ((packed));
38 struct extended_cssid {
41 } __attribute__ ((packed));
45 __u8 fc; /* SPID function code */
46 struct path_state ps; /* SNID path state */
49 __u32 cpu_addr : 16; /* CPU address */
50 struct extended_cssid ext_cssid;
52 __u32 cpu_id : 24; /* CPU identification */
53 __u32 cpu_model : 16; /* CPU model */
54 __u32 tod_high; /* high word TOD clock */
55 } __attribute__ ((packed));
60 * sense-id response buffer layout
64 __u8 reserved; /* always 0x'FF' */
65 __u16 cu_type; /* control unit type */
66 __u8 cu_model; /* control unit model */
67 __u16 dev_type; /* device type */
68 __u8 dev_model; /* device model */
69 __u8 unused; /* padding byte */
71 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
72 } __attribute__ ((packed,aligned(4)));
74 struct ccw_device_private {
75 int state; /* device state */
77 unsigned long registered;
78 __u16 devno; /* device number */
79 __u16 sch_no; /* subchannel number */
80 __u8 ssid; /* subchannel set id */
81 __u8 imask; /* lpm mask for SNID/SID/SPGID */
82 int iretry; /* retry counter SNID/SID/SPGID */
84 unsigned int fast:1; /* post with "channel end" */
85 unsigned int repall:1; /* report every interrupt status */
86 unsigned int pgroup:1; /* do path grouping */
87 unsigned int force:1; /* allow forced online */
88 } __attribute__ ((packed)) options;
90 unsigned int pgid_single:1; /* use single path for Set PGID */
91 unsigned int esid:1; /* Ext. SenseID supported by HW */
92 unsigned int dosense:1; /* delayed SENSE required */
93 unsigned int doverify:1; /* delayed path verification */
94 unsigned int donotify:1; /* call notify function */
95 unsigned int recog_done:1; /* dev. recog. complete */
96 unsigned int fake_irb:1; /* deliver faked irb */
97 } __attribute__((packed)) flags;
98 unsigned long intparm; /* user interruption parameter */
99 struct qdio_irq *qdio_data;
100 struct irb irb; /* device status */
101 struct senseid senseid; /* SenseID info */
102 struct pgid pgid; /* path group ID */
103 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
104 struct work_struct kick_work;
105 wait_queue_head_t wait_q;
106 struct timer_list timer;
107 void *cmb; /* measurement information */
108 struct list_head cmb_list; /* list of measured devices */
109 u64 cmb_start_time; /* clock value of cmb reset */
110 void *cmb_wait; /* deferred cmb enable/disable */
114 * A css driver handles all subchannels of one type.
115 * Currently, we only care about I/O subchannels (type 0), these
116 * have a ccw_device connected to them.
120 unsigned int subchannel_type;
121 struct device_driver drv;
122 void (*irq)(struct device *);
123 int (*notify)(struct device *, int);
124 void (*verify)(struct device *);
125 void (*termination)(struct device *);
126 int (*probe)(struct subchannel *);
127 int (*remove)(struct subchannel *);
128 void (*shutdown)(struct subchannel *);
132 * all css_drivers have the css_bus_type
134 extern struct bus_type css_bus_type;
135 extern struct css_driver io_subchannel_driver;
137 extern int css_probe_device(struct subchannel_id);
138 extern struct subchannel * get_subchannel_by_schid(struct subchannel_id);
139 extern int css_init_done;
140 extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
142 #define __MAX_SUBCHANNEL 65535
144 #define __MAX_CHPID 255
145 #define __MAX_CSSID 0
147 struct channel_subsystem {
150 struct channel_path *chps[__MAX_CHPID];
151 struct device device;
152 struct pgid global_pgid;
154 #define to_css(dev) container_of(dev, struct channel_subsystem, device)
156 extern struct bus_type css_bus_type;
157 extern struct channel_subsystem *css[];
159 /* Some helper functions for disconnected state. */
160 int device_is_disconnected(struct subchannel *);
161 void device_set_disconnected(struct subchannel *);
162 void device_trigger_reprobe(struct subchannel *);
164 /* Helper functions for vary on/off. */
165 int device_is_online(struct subchannel *);
166 void device_set_waiting(struct subchannel *);
168 /* Machine check helper function. */
169 void device_kill_pending_timer(struct subchannel *);
171 /* Helper functions to build lists for the slow path. */
172 extern int css_enqueue_subchannel_slow(struct subchannel_id schid);
173 void css_walk_subchannel_slow_list(void (*fn)(unsigned long));
174 void css_clear_subchannel_slow_list(void);
175 int css_slow_subchannels_exist(void);
176 extern int need_rescan;
178 extern struct workqueue_struct *slow_path_wq;
179 extern struct work_struct slow_path_work;