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cd6b4f27 CH |
1 | #ifndef S390_IO_SCH_H |
2 | #define S390_IO_SCH_H | |
3 | ||
e1f0fbd6 | 4 | #include <linux/types.h> |
9d92a7e1 | 5 | #include <asm/schid.h> |
e1f0fbd6 | 6 | #include <asm/ccwdev.h> |
de400d6b | 7 | #include <asm/irq.h> |
e1f0fbd6 | 8 | #include "css.h" |
9e6f9f85 | 9 | #include "orb.h" |
83262d63 | 10 | |
cd6b4f27 | 11 | struct io_subchannel_private { |
83262d63 | 12 | union orb orb; /* operation request block */ |
cd6b4f27 | 13 | struct ccw1 sense_ccw; /* static ccw for sense command */ |
97eb6bfc | 14 | struct ccw_device *cdev;/* pointer to the child ccw device */ |
c513d07a SO |
15 | struct { |
16 | unsigned int suspend:1; /* allow suspend */ | |
17 | unsigned int prefetch:1;/* deny prefetch */ | |
18 | unsigned int inter:1; /* suppress intermediate interrupts */ | |
19 | } __packed options; | |
20 | } __aligned(8); | |
cd6b4f27 | 21 | |
f92519e8 SO |
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)) | |
97eb6bfc SO |
25 | |
26 | static inline struct ccw_device *sch_get_cdev(struct subchannel *sch) | |
27 | { | |
28 | struct io_subchannel_private *priv = to_io_private(sch); | |
29 | return priv ? priv->cdev : NULL; | |
30 | } | |
31 | ||
32 | static inline void sch_set_cdev(struct subchannel *sch, | |
33 | struct ccw_device *cdev) | |
34 | { | |
35 | struct io_subchannel_private *priv = to_io_private(sch); | |
36 | if (priv) | |
37 | priv->cdev = cdev; | |
38 | } | |
cd6b4f27 CH |
39 | |
40 | #define MAX_CIWS 8 | |
41 | ||
e1f0fbd6 PO |
42 | /* |
43 | * Possible status values for a CCW request's I/O. | |
44 | */ | |
45 | enum io_status { | |
46 | IO_DONE, | |
47 | IO_RUNNING, | |
48 | IO_STATUS_ERROR, | |
49 | IO_PATH_ERROR, | |
50 | IO_REJECTED, | |
51 | IO_KILLED | |
52 | }; | |
53 | ||
54 | /** | |
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 | |
982bdf81 SO |
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 | |
e1f0fbd6 PO |
67 | * @mask: current path mask |
68 | * @retries: current number of retries | |
69 | * @drc: delayed return code | |
e1f0fbd6 PO |
70 | */ |
71 | struct ccw_request { | |
72 | struct ccw1 *cp; | |
73 | unsigned long timeout; | |
74 | u16 maxretries; | |
75 | u8 lpm; | |
76 | int (*check)(struct ccw_device *, void *); | |
77 | enum io_status (*filter)(struct ccw_device *, void *, struct irb *, | |
78 | enum io_status); | |
79 | void (*callback)(struct ccw_device *, void *, int); | |
80 | void *data; | |
982bdf81 | 81 | unsigned int singlepath:1; |
e1f0fbd6 | 82 | /* These fields are used internally. */ |
982bdf81 SO |
83 | unsigned int cancel:1; |
84 | unsigned int done:1; | |
de1b0438 | 85 | u16 mask; |
e1f0fbd6 PO |
86 | u16 retries; |
87 | int drc; | |
e1f0fbd6 PO |
88 | } __attribute__((packed)); |
89 | ||
cd6b4f27 CH |
90 | /* |
91 | * sense-id response buffer layout | |
92 | */ | |
93 | struct senseid { | |
94 | /* common part */ | |
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 */ | |
101 | /* extended part */ | |
102 | struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ | |
103 | } __attribute__ ((packed, aligned(4))); | |
104 | ||
37de53bb PO |
105 | enum cdev_todo { |
106 | CDEV_TODO_NOTHING, | |
107 | CDEV_TODO_ENABLE_CMF, | |
108 | CDEV_TODO_REBIND, | |
109 | CDEV_TODO_REGISTER, | |
110 | CDEV_TODO_UNREG, | |
111 | CDEV_TODO_UNREG_EVAL, | |
112 | }; | |
113 | ||
50c8e31f SO |
114 | #define FAKE_CMD_IRB 1 |
115 | #define FAKE_TM_IRB 2 | |
116 | ||
cd6b4f27 CH |
117 | struct ccw_device_private { |
118 | struct ccw_device *cdev; | |
119 | struct subchannel *sch; | |
120 | int state; /* device state */ | |
121 | atomic_t onoff; | |
cd6b4f27 CH |
122 | struct ccw_dev_id dev_id; /* device id */ |
123 | struct subchannel_id schid; /* subchannel number */ | |
e1f0fbd6 | 124 | struct ccw_request req; /* internal I/O request */ |
9679baaf | 125 | int iretry; |
585b954e SO |
126 | u8 pgid_valid_mask; /* mask of valid PGIDs */ |
127 | u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */ | |
128 | u8 pgid_reset_mask; /* mask of PGIDs which were reset */ | |
69f5576f SO |
129 | u8 path_noirq_mask; /* mask of paths for which no irq was |
130 | received */ | |
131 | u8 path_notoper_mask; /* mask of paths which were found | |
132 | not operable */ | |
585b954e SO |
133 | u8 path_gone_mask; /* mask of paths, that became unavailable */ |
134 | u8 path_new_mask; /* mask of paths, that became available */ | |
cd6b4f27 CH |
135 | struct { |
136 | unsigned int fast:1; /* post with "channel end" */ | |
137 | unsigned int repall:1; /* report every interrupt status */ | |
138 | unsigned int pgroup:1; /* do path grouping */ | |
139 | unsigned int force:1; /* allow forced online */ | |
454e1fa1 | 140 | unsigned int mpath:1; /* do multipathing */ |
cd6b4f27 CH |
141 | } __attribute__ ((packed)) options; |
142 | struct { | |
cd6b4f27 CH |
143 | unsigned int esid:1; /* Ext. SenseID supported by HW */ |
144 | unsigned int dosense:1; /* delayed SENSE required */ | |
145 | unsigned int doverify:1; /* delayed path verification */ | |
146 | unsigned int donotify:1; /* call notify function */ | |
147 | unsigned int recog_done:1; /* dev. recog. complete */ | |
50c8e31f | 148 | unsigned int fake_irb:2; /* deliver faked irb */ |
823d494a | 149 | unsigned int resuming:1; /* recognition while resume */ |
454e1fa1 PO |
150 | unsigned int pgroup:1; /* pathgroup is set up */ |
151 | unsigned int mpath:1; /* multipathing is set up */ | |
69f5576f | 152 | unsigned int pgid_unknown:1;/* unknown pgid state */ |
24a1872d | 153 | unsigned int initialized:1; /* set if initial reference held */ |
cd6b4f27 CH |
154 | } __attribute__((packed)) flags; |
155 | unsigned long intparm; /* user interruption parameter */ | |
156 | struct qdio_irq *qdio_data; | |
157 | struct irb irb; /* device status */ | |
158 | struct senseid senseid; /* SenseID info */ | |
159 | struct pgid pgid[8]; /* path group IDs per chpid*/ | |
160 | struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ | |
37de53bb PO |
161 | struct work_struct todo_work; |
162 | enum cdev_todo todo; | |
cd6b4f27 CH |
163 | wait_queue_head_t wait_q; |
164 | struct timer_list timer; | |
165 | void *cmb; /* measurement information */ | |
166 | struct list_head cmb_list; /* list of measured devices */ | |
167 | u64 cmb_start_time; /* clock value of cmb reset */ | |
168 | void *cmb_wait; /* deferred cmb enable/disable */ | |
de400d6b | 169 | enum interruption_class int_class; |
cd6b4f27 CH |
170 | }; |
171 | ||
cd6b4f27 CH |
172 | static inline int rsch(struct subchannel_id schid) |
173 | { | |
174 | register struct subchannel_id reg1 asm("1") = schid; | |
175 | int ccode; | |
176 | ||
177 | asm volatile( | |
178 | " rsch\n" | |
179 | " ipm %0\n" | |
180 | " srl %0,28" | |
f9c9fe3e PO |
181 | : "=d" (ccode) |
182 | : "d" (reg1) | |
183 | : "cc", "memory"); | |
cd6b4f27 CH |
184 | return ccode; |
185 | } | |
186 | ||
cd6b4f27 CH |
187 | static inline int hsch(struct subchannel_id schid) |
188 | { | |
189 | register struct subchannel_id reg1 asm("1") = schid; | |
190 | int ccode; | |
191 | ||
192 | asm volatile( | |
193 | " hsch\n" | |
194 | " ipm %0\n" | |
195 | " srl %0,28" | |
f9c9fe3e PO |
196 | : "=d" (ccode) |
197 | : "d" (reg1) | |
198 | : "cc"); | |
cd6b4f27 CH |
199 | return ccode; |
200 | } | |
201 | ||
202 | static inline int xsch(struct subchannel_id schid) | |
203 | { | |
204 | register struct subchannel_id reg1 asm("1") = schid; | |
205 | int ccode; | |
206 | ||
207 | asm volatile( | |
208 | " .insn rre,0xb2760000,%1,0\n" | |
209 | " ipm %0\n" | |
210 | " srl %0,28" | |
f9c9fe3e PO |
211 | : "=d" (ccode) |
212 | : "d" (reg1) | |
213 | : "cc"); | |
cd6b4f27 CH |
214 | return ccode; |
215 | } | |
216 | ||
217 | #endif |