1 #ifndef S390_IO_SCH_H 2 #define S390_IO_SCH_H 3 4 #include <linux/types.h> 5 #include <asm/schid.h> 6 #include <asm/ccwdev.h> 7 #include "css.h" 8 9 /* 10 * command-mode operation request block 11 */ 12 struct cmd_orb { 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))); 33 34 /* 35 * transport-mode operation request block 36 */ 37 struct tm_orb { 38 u32 intparm; 39 u32 key:4; 40 u32 :9; 41 u32 b:1; 42 u32 :2; 43 u32 lpm:8; 44 u32 :7; 45 u32 x:1; 46 u32 tcw; 47 u32 prio:8; 48 u32 :8; 49 u32 rsvpgm:8; 50 u32 :8; 51 u32 :32; 52 u32 :32; 53 u32 :32; 54 u32 :32; 55 } __attribute__ ((packed, aligned(4))); 56 57 union orb { 58 struct cmd_orb cmd; 59 struct tm_orb tm; 60 } __attribute__ ((packed, aligned(4))); 61 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))); 66 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)) 70 71 #define MAX_CIWS 8 72 73 /* 74 * Possible status values for a CCW request's I/O. 75 */ 76 enum io_status { 77 IO_DONE, 78 IO_RUNNING, 79 IO_STATUS_ERROR, 80 IO_PATH_ERROR, 81 IO_REJECTED, 82 IO_KILLED 83 }; 84 85 /** 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 101 */ 102 struct ccw_request { 103 struct ccw1 *cp; 104 unsigned long timeout; 105 u16 maxretries; 106 u8 lpm; 107 int (*check)(struct ccw_device *, void *); 108 enum io_status (*filter)(struct ccw_device *, void *, struct irb *, 109 enum io_status); 110 void (*callback)(struct ccw_device *, void *, int); 111 void *data; 112 unsigned int singlepath:1; 113 /* These fields are used internally. */ 114 unsigned int cancel:1; 115 unsigned int done:1; 116 u16 mask; 117 u16 retries; 118 int drc; 119 } __attribute__((packed)); 120 121 /* 122 * sense-id response buffer layout 123 */ 124 struct senseid { 125 /* common part */ 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 */ 132 /* extended part */ 133 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ 134 } __attribute__ ((packed, aligned(4))); 135 136 enum cdev_todo { 137 CDEV_TODO_NOTHING, 138 CDEV_TODO_ENABLE_CMF, 139 CDEV_TODO_REBIND, 140 CDEV_TODO_REGISTER, 141 CDEV_TODO_UNREG, 142 CDEV_TODO_UNREG_EVAL, 143 }; 144 145 struct ccw_device_private { 146 struct ccw_device *cdev; 147 struct subchannel *sch; 148 int state; /* device state */ 149 atomic_t onoff; 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 */ 153 int iretry; 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 */ 159 struct { 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; 166 struct { 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; 185 enum cdev_todo todo; 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 */ 192 }; 193 194 static inline int ssch(struct subchannel_id schid, union orb *addr) 195 { 196 register struct subchannel_id reg1 asm("1") = schid; 197 int ccode = -EIO; 198 199 asm volatile( 200 " ssch 0(%2)\n" 201 "0: ipm %0\n" 202 " srl %0,28\n" 203 "1:\n" 204 EX_TABLE(0b, 1b) 205 : "+d" (ccode) 206 : "d" (reg1), "a" (addr), "m" (*addr) 207 : "cc", "memory"); 208 return ccode; 209 } 210 211 static inline int rsch(struct subchannel_id schid) 212 { 213 register struct subchannel_id reg1 asm("1") = schid; 214 int ccode; 215 216 asm volatile( 217 " rsch\n" 218 " ipm %0\n" 219 " srl %0,28" 220 : "=d" (ccode) 221 : "d" (reg1) 222 : "cc", "memory"); 223 return ccode; 224 } 225 226 static inline int csch(struct subchannel_id schid) 227 { 228 register struct subchannel_id reg1 asm("1") = schid; 229 int ccode; 230 231 asm volatile( 232 " csch\n" 233 " ipm %0\n" 234 " srl %0,28" 235 : "=d" (ccode) 236 : "d" (reg1) 237 : "cc"); 238 return ccode; 239 } 240 241 static inline int hsch(struct subchannel_id schid) 242 { 243 register struct subchannel_id reg1 asm("1") = schid; 244 int ccode; 245 246 asm volatile( 247 " hsch\n" 248 " ipm %0\n" 249 " srl %0,28" 250 : "=d" (ccode) 251 : "d" (reg1) 252 : "cc"); 253 return ccode; 254 } 255 256 static inline int xsch(struct subchannel_id schid) 257 { 258 register struct subchannel_id reg1 asm("1") = schid; 259 int ccode; 260 261 asm volatile( 262 " .insn rre,0xb2760000,%1,0\n" 263 " ipm %0\n" 264 " srl %0,28" 265 : "=d" (ccode) 266 : "d" (reg1) 267 : "cc"); 268 return ccode; 269 } 270 271 #endif 272