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 struct { 157 unsigned int fast:1; /* post with "channel end" */ 158 unsigned int repall:1; /* report every interrupt status */ 159 unsigned int pgroup:1; /* do path grouping */ 160 unsigned int force:1; /* allow forced online */ 161 unsigned int mpath:1; /* do multipathing */ 162 } __attribute__ ((packed)) options; 163 struct { 164 unsigned int esid:1; /* Ext. SenseID supported by HW */ 165 unsigned int dosense:1; /* delayed SENSE required */ 166 unsigned int doverify:1; /* delayed path verification */ 167 unsigned int donotify:1; /* call notify function */ 168 unsigned int recog_done:1; /* dev. recog. complete */ 169 unsigned int fake_irb:1; /* deliver faked irb */ 170 unsigned int resuming:1; /* recognition while resume */ 171 unsigned int pgroup:1; /* pathgroup is set up */ 172 unsigned int mpath:1; /* multipathing is set up */ 173 unsigned int initialized:1; /* set if initial reference held */ 174 } __attribute__((packed)) flags; 175 unsigned long intparm; /* user interruption parameter */ 176 struct qdio_irq *qdio_data; 177 struct irb irb; /* device status */ 178 struct senseid senseid; /* SenseID info */ 179 struct pgid pgid[8]; /* path group IDs per chpid*/ 180 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ 181 struct work_struct todo_work; 182 enum cdev_todo todo; 183 wait_queue_head_t wait_q; 184 struct timer_list timer; 185 void *cmb; /* measurement information */ 186 struct list_head cmb_list; /* list of measured devices */ 187 u64 cmb_start_time; /* clock value of cmb reset */ 188 void *cmb_wait; /* deferred cmb enable/disable */ 189 }; 190 191 static inline int ssch(struct subchannel_id schid, union orb *addr) 192 { 193 register struct subchannel_id reg1 asm("1") = schid; 194 int ccode = -EIO; 195 196 asm volatile( 197 " ssch 0(%2)\n" 198 "0: ipm %0\n" 199 " srl %0,28\n" 200 "1:\n" 201 EX_TABLE(0b, 1b) 202 : "+d" (ccode) 203 : "d" (reg1), "a" (addr), "m" (*addr) 204 : "cc", "memory"); 205 return ccode; 206 } 207 208 static inline int rsch(struct subchannel_id schid) 209 { 210 register struct subchannel_id reg1 asm("1") = schid; 211 int ccode; 212 213 asm volatile( 214 " rsch\n" 215 " ipm %0\n" 216 " srl %0,28" 217 : "=d" (ccode) 218 : "d" (reg1) 219 : "cc", "memory"); 220 return ccode; 221 } 222 223 static inline int csch(struct subchannel_id schid) 224 { 225 register struct subchannel_id reg1 asm("1") = schid; 226 int ccode; 227 228 asm volatile( 229 " csch\n" 230 " ipm %0\n" 231 " srl %0,28" 232 : "=d" (ccode) 233 : "d" (reg1) 234 : "cc"); 235 return ccode; 236 } 237 238 static inline int hsch(struct subchannel_id schid) 239 { 240 register struct subchannel_id reg1 asm("1") = schid; 241 int ccode; 242 243 asm volatile( 244 " hsch\n" 245 " ipm %0\n" 246 " srl %0,28" 247 : "=d" (ccode) 248 : "d" (reg1) 249 : "cc"); 250 return ccode; 251 } 252 253 static inline int xsch(struct subchannel_id schid) 254 { 255 register struct subchannel_id reg1 asm("1") = schid; 256 int ccode; 257 258 asm volatile( 259 " .insn rre,0xb2760000,%1,0\n" 260 " ipm %0\n" 261 " srl %0,28" 262 : "=d" (ccode) 263 : "d" (reg1) 264 : "cc"); 265 return ccode; 266 } 267 268 #endif 269