4 #include <linux/types.h>
6 #include <asm/ccwdev.h>
10 * command-mode operation request block
13 u32 intparm
; /* interruption parameter */
14 u32 key
: 4; /* flags, like key, suspend control, etc. */
15 u32 spnd
: 1; /* suspend control */
16 u32 res1
: 1; /* reserved */
17 u32 mod
: 1; /* modification control */
18 u32 sync
: 1; /* synchronize control */
19 u32 fmt
: 1; /* format control */
20 u32 pfch
: 1; /* prefetch control */
21 u32 isic
: 1; /* initial-status-interruption control */
22 u32 alcc
: 1; /* address-limit-checking control */
23 u32 ssic
: 1; /* suppress-suspended-interr. control */
24 u32 res2
: 1; /* reserved */
25 u32 c64
: 1; /* IDAW/QDIO 64 bit control */
26 u32 i2k
: 1; /* IDAW 2/4kB block size control */
27 u32 lpm
: 8; /* logical path mask */
28 u32 ils
: 1; /* incorrect length */
29 u32 zero
: 6; /* reserved zeros */
30 u32 orbx
: 1; /* ORB extension control */
31 u32 cpa
; /* channel program address */
32 } __attribute__ ((packed
, aligned(4)));
35 * transport-mode operation request block
55 } __attribute__ ((packed
, aligned(4)));
60 } __attribute__ ((packed
, aligned(4)));
62 struct io_subchannel_private
{
63 union orb orb
; /* operation request block */
64 struct ccw1 sense_ccw
; /* static ccw for sense command */
65 } __attribute__ ((aligned(8)));
67 #define to_io_private(n) ((struct io_subchannel_private *)n->private)
68 #define sch_get_cdev(n) (dev_get_drvdata(&n->dev))
69 #define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c))
74 * Possible status values for a CCW request's I/O.
86 * ccw_request - Internal CCW request.
87 * @cp: channel program to start
88 * @timeout: maximum allowable time in jiffies between start I/O and interrupt
89 * @maxretries: number of retries per I/O operation and path
90 * @lpm: mask of paths to use
91 * @check: optional callback that determines if results are final
92 * @filter: optional callback to adjust request status based on IRB data
93 * @callback: final callback
94 * @data: user-defined pointer passed to all callbacks
95 * @singlepath: if set, use only one path from @lpm per start I/O
96 * @cancel: non-zero if request was cancelled
97 * @done: non-zero if request was finished
98 * @mask: current path mask
99 * @retries: current number of retries
100 * @drc: delayed return code
104 unsigned long timeout
;
107 int (*check
)(struct ccw_device
*, void *);
108 enum io_status (*filter
)(struct ccw_device
*, void *, struct irb
*,
110 void (*callback
)(struct ccw_device
*, void *, int);
112 unsigned int singlepath
:1;
113 /* These fields are used internally. */
114 unsigned int cancel
:1;
119 } __attribute__((packed
));
122 * sense-id response buffer layout
126 u8 reserved
; /* always 0x'FF' */
127 u16 cu_type
; /* control unit type */
128 u8 cu_model
; /* control unit model */
129 u16 dev_type
; /* device type */
130 u8 dev_model
; /* device model */
131 u8 unused
; /* padding byte */
133 struct ciw ciw
[MAX_CIWS
]; /* variable # of CIWs */
134 } __attribute__ ((packed
, aligned(4)));
138 CDEV_TODO_ENABLE_CMF
,
142 CDEV_TODO_UNREG_EVAL
,
145 struct ccw_device_private
{
146 struct ccw_device
*cdev
;
147 struct subchannel
*sch
;
148 int state
; /* device state */
150 struct ccw_dev_id dev_id
; /* device id */
151 struct subchannel_id schid
; /* subchannel number */
152 struct ccw_request req
; /* internal I/O request */
154 u8 pgid_valid_mask
; /* mask of valid PGIDs */
155 u8 pgid_todo_mask
; /* mask of PGIDs to be adjusted */
156 u8 pgid_reset_mask
; /* mask of PGIDs which were reset */
157 u8 path_gone_mask
; /* mask of paths, that became unavailable */
158 u8 path_new_mask
; /* mask of paths, that became available */
160 unsigned int fast
:1; /* post with "channel end" */
161 unsigned int repall
:1; /* report every interrupt status */
162 unsigned int pgroup
:1; /* do path grouping */
163 unsigned int force
:1; /* allow forced online */
164 unsigned int mpath
:1; /* do multipathing */
165 } __attribute__ ((packed
)) options
;
167 unsigned int esid
:1; /* Ext. SenseID supported by HW */
168 unsigned int dosense
:1; /* delayed SENSE required */
169 unsigned int doverify
:1; /* delayed path verification */
170 unsigned int donotify
:1; /* call notify function */
171 unsigned int recog_done
:1; /* dev. recog. complete */
172 unsigned int fake_irb
:1; /* deliver faked irb */
173 unsigned int resuming
:1; /* recognition while resume */
174 unsigned int pgroup
:1; /* pathgroup is set up */
175 unsigned int mpath
:1; /* multipathing is set up */
176 unsigned int initialized
:1; /* set if initial reference held */
177 } __attribute__((packed
)) flags
;
178 unsigned long intparm
; /* user interruption parameter */
179 struct qdio_irq
*qdio_data
;
180 struct irb irb
; /* device status */
181 struct senseid senseid
; /* SenseID info */
182 struct pgid pgid
[8]; /* path group IDs per chpid*/
183 struct ccw1 iccws
[2]; /* ccws for SNID/SID/SPGID commands */
184 struct work_struct todo_work
;
186 wait_queue_head_t wait_q
;
187 struct timer_list timer
;
188 void *cmb
; /* measurement information */
189 struct list_head cmb_list
; /* list of measured devices */
190 u64 cmb_start_time
; /* clock value of cmb reset */
191 void *cmb_wait
; /* deferred cmb enable/disable */
194 static inline int ssch(struct subchannel_id schid
, union orb
*addr
)
196 register struct subchannel_id reg1
asm("1") = schid
;
206 : "d" (reg1
), "a" (addr
), "m" (*addr
)
211 static inline int rsch(struct subchannel_id schid
)
213 register struct subchannel_id reg1
asm("1") = schid
;
226 static inline int csch(struct subchannel_id schid
)
228 register struct subchannel_id reg1
asm("1") = schid
;
241 static inline int hsch(struct subchannel_id schid
)
243 register struct subchannel_id reg1
asm("1") = schid
;
256 static inline int xsch(struct subchannel_id schid
)
258 register struct subchannel_id reg1
asm("1") = schid
;
262 " .insn rre,0xb2760000,%1,0\n"