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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
cd6b4f27 CH |
2 | #ifndef S390_IO_SCH_H |
3 | #define S390_IO_SCH_H | |
4 | ||
e1f0fbd6 | 5 | #include <linux/types.h> |
9d92a7e1 | 6 | #include <asm/schid.h> |
e1f0fbd6 | 7 | #include <asm/ccwdev.h> |
de400d6b | 8 | #include <asm/irq.h> |
e1f0fbd6 | 9 | #include "css.h" |
9e6f9f85 | 10 | #include "orb.h" |
83262d63 | 11 | |
37db8985 HP |
12 | struct io_subchannel_dma_area { |
13 | struct ccw1 sense_ccw; /* static ccw for sense command */ | |
14 | }; | |
15 | ||
cd6b4f27 | 16 | struct io_subchannel_private { |
83262d63 | 17 | union orb orb; /* operation request block */ |
97eb6bfc | 18 | struct ccw_device *cdev;/* pointer to the child ccw device */ |
c513d07a SO |
19 | struct { |
20 | unsigned int suspend:1; /* allow suspend */ | |
21 | unsigned int prefetch:1;/* deny prefetch */ | |
22 | unsigned int inter:1; /* suppress intermediate interrupts */ | |
23 | } __packed options; | |
37db8985 HP |
24 | struct io_subchannel_dma_area *dma_area; |
25 | dma_addr_t dma_area_dma; | |
c513d07a | 26 | } __aligned(8); |
cd6b4f27 | 27 | |
f92519e8 SO |
28 | #define to_io_private(n) ((struct io_subchannel_private *) \ |
29 | dev_get_drvdata(&(n)->dev)) | |
30 | #define set_io_private(n, p) (dev_set_drvdata(&(n)->dev, p)) | |
97eb6bfc SO |
31 | |
32 | static inline struct ccw_device *sch_get_cdev(struct subchannel *sch) | |
33 | { | |
34 | struct io_subchannel_private *priv = to_io_private(sch); | |
35 | return priv ? priv->cdev : NULL; | |
36 | } | |
37 | ||
38 | static inline void sch_set_cdev(struct subchannel *sch, | |
39 | struct ccw_device *cdev) | |
40 | { | |
41 | struct io_subchannel_private *priv = to_io_private(sch); | |
42 | if (priv) | |
43 | priv->cdev = cdev; | |
44 | } | |
cd6b4f27 CH |
45 | |
46 | #define MAX_CIWS 8 | |
47 | ||
e1f0fbd6 PO |
48 | /* |
49 | * Possible status values for a CCW request's I/O. | |
50 | */ | |
51 | enum io_status { | |
52 | IO_DONE, | |
53 | IO_RUNNING, | |
54 | IO_STATUS_ERROR, | |
55 | IO_PATH_ERROR, | |
56 | IO_REJECTED, | |
57 | IO_KILLED | |
58 | }; | |
59 | ||
60 | /** | |
61 | * ccw_request - Internal CCW request. | |
62 | * @cp: channel program to start | |
63 | * @timeout: maximum allowable time in jiffies between start I/O and interrupt | |
64 | * @maxretries: number of retries per I/O operation and path | |
65 | * @lpm: mask of paths to use | |
66 | * @check: optional callback that determines if results are final | |
67 | * @filter: optional callback to adjust request status based on IRB data | |
68 | * @callback: final callback | |
69 | * @data: user-defined pointer passed to all callbacks | |
982bdf81 SO |
70 | * @singlepath: if set, use only one path from @lpm per start I/O |
71 | * @cancel: non-zero if request was cancelled | |
72 | * @done: non-zero if request was finished | |
e1f0fbd6 PO |
73 | * @mask: current path mask |
74 | * @retries: current number of retries | |
75 | * @drc: delayed return code | |
e1f0fbd6 PO |
76 | */ |
77 | struct ccw_request { | |
78 | struct ccw1 *cp; | |
79 | unsigned long timeout; | |
80 | u16 maxretries; | |
81 | u8 lpm; | |
82 | int (*check)(struct ccw_device *, void *); | |
83 | enum io_status (*filter)(struct ccw_device *, void *, struct irb *, | |
84 | enum io_status); | |
85 | void (*callback)(struct ccw_device *, void *, int); | |
86 | void *data; | |
982bdf81 | 87 | unsigned int singlepath:1; |
e1f0fbd6 | 88 | /* These fields are used internally. */ |
982bdf81 SO |
89 | unsigned int cancel:1; |
90 | unsigned int done:1; | |
de1b0438 | 91 | u16 mask; |
e1f0fbd6 PO |
92 | u16 retries; |
93 | int drc; | |
e1f0fbd6 PO |
94 | } __attribute__((packed)); |
95 | ||
cd6b4f27 CH |
96 | /* |
97 | * sense-id response buffer layout | |
98 | */ | |
99 | struct senseid { | |
100 | /* common part */ | |
101 | u8 reserved; /* always 0x'FF' */ | |
102 | u16 cu_type; /* control unit type */ | |
103 | u8 cu_model; /* control unit model */ | |
104 | u16 dev_type; /* device type */ | |
105 | u8 dev_model; /* device model */ | |
106 | u8 unused; /* padding byte */ | |
107 | /* extended part */ | |
108 | struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ | |
109 | } __attribute__ ((packed, aligned(4))); | |
110 | ||
37de53bb PO |
111 | enum cdev_todo { |
112 | CDEV_TODO_NOTHING, | |
113 | CDEV_TODO_ENABLE_CMF, | |
114 | CDEV_TODO_REBIND, | |
115 | CDEV_TODO_REGISTER, | |
116 | CDEV_TODO_UNREG, | |
117 | CDEV_TODO_UNREG_EVAL, | |
118 | }; | |
119 | ||
50c8e31f SO |
120 | #define FAKE_CMD_IRB 1 |
121 | #define FAKE_TM_IRB 2 | |
122 | ||
37db8985 HP |
123 | struct ccw_device_dma_area { |
124 | struct senseid senseid; /* SenseID info */ | |
125 | struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ | |
126 | struct irb irb; /* device status */ | |
127 | struct pgid pgid[8]; /* path group IDs per chpid*/ | |
128 | }; | |
129 | ||
cd6b4f27 CH |
130 | struct ccw_device_private { |
131 | struct ccw_device *cdev; | |
132 | struct subchannel *sch; | |
133 | int state; /* device state */ | |
134 | atomic_t onoff; | |
cd6b4f27 | 135 | struct ccw_dev_id dev_id; /* device id */ |
e1f0fbd6 | 136 | struct ccw_request req; /* internal I/O request */ |
9679baaf | 137 | int iretry; |
585b954e SO |
138 | u8 pgid_valid_mask; /* mask of valid PGIDs */ |
139 | u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */ | |
140 | u8 pgid_reset_mask; /* mask of PGIDs which were reset */ | |
69f5576f SO |
141 | u8 path_noirq_mask; /* mask of paths for which no irq was |
142 | received */ | |
143 | u8 path_notoper_mask; /* mask of paths which were found | |
144 | not operable */ | |
585b954e SO |
145 | u8 path_gone_mask; /* mask of paths, that became unavailable */ |
146 | u8 path_new_mask; /* mask of paths, that became available */ | |
55fb7347 SO |
147 | u8 path_broken_mask; /* mask of paths, which were found to be |
148 | unusable */ | |
cd6b4f27 CH |
149 | struct { |
150 | unsigned int fast:1; /* post with "channel end" */ | |
151 | unsigned int repall:1; /* report every interrupt status */ | |
152 | unsigned int pgroup:1; /* do path grouping */ | |
153 | unsigned int force:1; /* allow forced online */ | |
454e1fa1 | 154 | unsigned int mpath:1; /* do multipathing */ |
cd6b4f27 CH |
155 | } __attribute__ ((packed)) options; |
156 | struct { | |
cd6b4f27 CH |
157 | unsigned int esid:1; /* Ext. SenseID supported by HW */ |
158 | unsigned int dosense:1; /* delayed SENSE required */ | |
159 | unsigned int doverify:1; /* delayed path verification */ | |
160 | unsigned int donotify:1; /* call notify function */ | |
161 | unsigned int recog_done:1; /* dev. recog. complete */ | |
50c8e31f | 162 | unsigned int fake_irb:2; /* deliver faked irb */ |
454e1fa1 PO |
163 | unsigned int pgroup:1; /* pathgroup is set up */ |
164 | unsigned int mpath:1; /* multipathing is set up */ | |
69f5576f | 165 | unsigned int pgid_unknown:1;/* unknown pgid state */ |
24a1872d | 166 | unsigned int initialized:1; /* set if initial reference held */ |
cd6b4f27 CH |
167 | } __attribute__((packed)) flags; |
168 | unsigned long intparm; /* user interruption parameter */ | |
169 | struct qdio_irq *qdio_data; | |
770b55c9 | 170 | int async_kill_io_rc; |
37de53bb PO |
171 | struct work_struct todo_work; |
172 | enum cdev_todo todo; | |
cd6b4f27 CH |
173 | wait_queue_head_t wait_q; |
174 | struct timer_list timer; | |
175 | void *cmb; /* measurement information */ | |
176 | struct list_head cmb_list; /* list of measured devices */ | |
177 | u64 cmb_start_time; /* clock value of cmb reset */ | |
178 | void *cmb_wait; /* deferred cmb enable/disable */ | |
37db8985 HP |
179 | struct gen_pool *dma_pool; |
180 | struct ccw_device_dma_area *dma_area; | |
de400d6b | 181 | enum interruption_class int_class; |
cd6b4f27 CH |
182 | }; |
183 | ||
cd6b4f27 | 184 | #endif |