4 #include <linux/types.h>
6 #include <asm/ccwdev.h>
11 struct io_subchannel_private {
12 union orb orb; /* operation request block */
13 struct ccw1 sense_ccw; /* static ccw for sense command */
14 struct ccw_device *cdev;/* pointer to the child ccw device */
16 unsigned int suspend:1; /* allow suspend */
17 unsigned int prefetch:1;/* deny prefetch */
18 unsigned int inter:1; /* suppress intermediate interrupts */
22 #define to_io_private(n) ((struct io_subchannel_private *) \
23 dev_get_drvdata(&(n)->dev))
24 #define set_io_private(n, p) (dev_set_drvdata(&(n)->dev, p))
26 static inline struct ccw_device *sch_get_cdev(struct subchannel *sch)
28 struct io_subchannel_private *priv = to_io_private(sch);
29 return priv ? priv->cdev : NULL;
32 static inline void sch_set_cdev(struct subchannel *sch,
33 struct ccw_device *cdev)
35 struct io_subchannel_private *priv = to_io_private(sch);
43 * Possible status values for a CCW request's I/O.
55 * ccw_request - Internal CCW request.
56 * @cp: channel program to start
57 * @timeout: maximum allowable time in jiffies between start I/O and interrupt
58 * @maxretries: number of retries per I/O operation and path
59 * @lpm: mask of paths to use
60 * @check: optional callback that determines if results are final
61 * @filter: optional callback to adjust request status based on IRB data
62 * @callback: final callback
63 * @data: user-defined pointer passed to all callbacks
64 * @singlepath: if set, use only one path from @lpm per start I/O
65 * @cancel: non-zero if request was cancelled
66 * @done: non-zero if request was finished
67 * @mask: current path mask
68 * @retries: current number of retries
69 * @drc: delayed return code
73 unsigned long timeout;
76 int (*check)(struct ccw_device *, void *);
77 enum io_status (*filter)(struct ccw_device *, void *, struct irb *,
79 void (*callback)(struct ccw_device *, void *, int);
81 unsigned int singlepath:1;
82 /* These fields are used internally. */
83 unsigned int cancel:1;
88 } __attribute__((packed));
91 * sense-id response buffer layout
95 u8 reserved; /* always 0x'FF' */
96 u16 cu_type; /* control unit type */
97 u8 cu_model; /* control unit model */
98 u16 dev_type; /* device type */
99 u8 dev_model; /* device model */
100 u8 unused; /* padding byte */
102 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
103 } __attribute__ ((packed, aligned(4)));
107 CDEV_TODO_ENABLE_CMF,
111 CDEV_TODO_UNREG_EVAL,
114 #define FAKE_CMD_IRB 1
115 #define FAKE_TM_IRB 2
117 struct ccw_device_private {
118 struct ccw_device *cdev;
119 struct subchannel *sch;
120 int state; /* device state */
122 struct ccw_dev_id dev_id; /* device id */
123 struct ccw_request req; /* internal I/O request */
125 u8 pgid_valid_mask; /* mask of valid PGIDs */
126 u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */
127 u8 pgid_reset_mask; /* mask of PGIDs which were reset */
128 u8 path_noirq_mask; /* mask of paths for which no irq was
130 u8 path_notoper_mask; /* mask of paths which were found
132 u8 path_gone_mask; /* mask of paths, that became unavailable */
133 u8 path_new_mask; /* mask of paths, that became available */
135 unsigned int fast:1; /* post with "channel end" */
136 unsigned int repall:1; /* report every interrupt status */
137 unsigned int pgroup:1; /* do path grouping */
138 unsigned int force:1; /* allow forced online */
139 unsigned int mpath:1; /* do multipathing */
140 } __attribute__ ((packed)) options;
142 unsigned int esid:1; /* Ext. SenseID supported by HW */
143 unsigned int dosense:1; /* delayed SENSE required */
144 unsigned int doverify:1; /* delayed path verification */
145 unsigned int donotify:1; /* call notify function */
146 unsigned int recog_done:1; /* dev. recog. complete */
147 unsigned int fake_irb:2; /* deliver faked irb */
148 unsigned int resuming:1; /* recognition while resume */
149 unsigned int pgroup:1; /* pathgroup is set up */
150 unsigned int mpath:1; /* multipathing is set up */
151 unsigned int pgid_unknown:1;/* unknown pgid state */
152 unsigned int initialized:1; /* set if initial reference held */
153 } __attribute__((packed)) flags;
154 unsigned long intparm; /* user interruption parameter */
155 struct qdio_irq *qdio_data;
156 struct irb irb; /* device status */
157 struct senseid senseid; /* SenseID info */
158 struct pgid pgid[8]; /* path group IDs per chpid*/
159 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
160 struct work_struct todo_work;
162 wait_queue_head_t wait_q;
163 struct timer_list timer;
164 void *cmb; /* measurement information */
165 struct list_head cmb_list; /* list of measured devices */
166 u64 cmb_start_time; /* clock value of cmb reset */
167 void *cmb_wait; /* deferred cmb enable/disable */
168 enum interruption_class int_class;