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 * @mask: current path mask 96 * @retries: current number of retries 97 * @drc: delayed return code 98 * @cancel: non-zero if request was cancelled 99 * @done: non-zero if request was finished 100 */ 101 struct ccw_request { 102 struct ccw1 *cp; 103 unsigned long timeout; 104 u16 maxretries; 105 u8 lpm; 106 int (*check)(struct ccw_device *, void *); 107 enum io_status (*filter)(struct ccw_device *, void *, struct irb *, 108 enum io_status); 109 void (*callback)(struct ccw_device *, void *, int); 110 void *data; 111 /* These fields are used internally. */ 112 u16 mask; 113 u16 retries; 114 int drc; 115 int cancel:1; 116 int done:1; 117 } __attribute__((packed)); 118 119 /* 120 * sense-id response buffer layout 121 */ 122 struct senseid { 123 /* common part */ 124 u8 reserved; /* always 0x'FF' */ 125 u16 cu_type; /* control unit type */ 126 u8 cu_model; /* control unit model */ 127 u16 dev_type; /* device type */ 128 u8 dev_model; /* device model */ 129 u8 unused; /* padding byte */ 130 /* extended part */ 131 struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */ 132 } __attribute__ ((packed, aligned(4))); 133 134 enum cdev_todo { 135 CDEV_TODO_NOTHING, 136 CDEV_TODO_ENABLE_CMF, 137 CDEV_TODO_REBIND, 138 CDEV_TODO_REGISTER, 139 CDEV_TODO_UNREG, 140 CDEV_TODO_UNREG_EVAL, 141 }; 142 143 struct ccw_device_private { 144 struct ccw_device *cdev; 145 struct subchannel *sch; 146 int state; /* device state */ 147 atomic_t onoff; 148 struct ccw_dev_id dev_id; /* device id */ 149 struct subchannel_id schid; /* subchannel number */ 150 struct ccw_request req; /* internal I/O request */ 151 int iretry; 152 u8 pgid_valid_mask; /* mask of valid PGIDs */ 153 u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */ 154 struct { 155 unsigned int fast:1; /* post with "channel end" */ 156 unsigned int repall:1; /* report every interrupt status */ 157 unsigned int pgroup:1; /* do path grouping */ 158 unsigned int force:1; /* allow forced online */ 159 unsigned int mpath:1; /* do multipathing */ 160 } __attribute__ ((packed)) options; 161 struct { 162 unsigned int esid:1; /* Ext. SenseID supported by HW */ 163 unsigned int dosense:1; /* delayed SENSE required */ 164 unsigned int doverify:1; /* delayed path verification */ 165 unsigned int donotify:1; /* call notify function */ 166 unsigned int recog_done:1; /* dev. recog. complete */ 167 unsigned int fake_irb:1; /* deliver faked irb */ 168 unsigned int resuming:1; /* recognition while resume */ 169 unsigned int pgroup:1; /* pathgroup is set up */ 170 unsigned int mpath:1; /* multipathing is set up */ 171 unsigned int initialized:1; /* set if initial reference held */ 172 } __attribute__((packed)) flags; 173 unsigned long intparm; /* user interruption parameter */ 174 struct qdio_irq *qdio_data; 175 struct irb irb; /* device status */ 176 struct senseid senseid; /* SenseID info */ 177 struct pgid pgid[8]; /* path group IDs per chpid*/ 178 struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */ 179 struct work_struct todo_work; 180 enum cdev_todo todo; 181 wait_queue_head_t wait_q; 182 struct timer_list timer; 183 void *cmb; /* measurement information */ 184 struct list_head cmb_list; /* list of measured devices */ 185 u64 cmb_start_time; /* clock value of cmb reset */ 186 void *cmb_wait; /* deferred cmb enable/disable */ 187 }; 188 189 static inline int ssch(struct subchannel_id schid, union orb *addr) 190 { 191 register struct subchannel_id reg1 asm("1") = schid; 192 int ccode = -EIO; 193 194 asm volatile( 195 " ssch 0(%2)\n" 196 "0: ipm %0\n" 197 " srl %0,28\n" 198 "1:\n" 199 EX_TABLE(0b, 1b) 200 : "+d" (ccode) 201 : "d" (reg1), "a" (addr), "m" (*addr) 202 : "cc", "memory"); 203 return ccode; 204 } 205 206 static inline int rsch(struct subchannel_id schid) 207 { 208 register struct subchannel_id reg1 asm("1") = schid; 209 int ccode; 210 211 asm volatile( 212 " rsch\n" 213 " ipm %0\n" 214 " srl %0,28" 215 : "=d" (ccode) 216 : "d" (reg1) 217 : "cc", "memory"); 218 return ccode; 219 } 220 221 static inline int csch(struct subchannel_id schid) 222 { 223 register struct subchannel_id reg1 asm("1") = schid; 224 int ccode; 225 226 asm volatile( 227 " csch\n" 228 " ipm %0\n" 229 " srl %0,28" 230 : "=d" (ccode) 231 : "d" (reg1) 232 : "cc"); 233 return ccode; 234 } 235 236 static inline int hsch(struct subchannel_id schid) 237 { 238 register struct subchannel_id reg1 asm("1") = schid; 239 int ccode; 240 241 asm volatile( 242 " hsch\n" 243 " ipm %0\n" 244 " srl %0,28" 245 : "=d" (ccode) 246 : "d" (reg1) 247 : "cc"); 248 return ccode; 249 } 250 251 static inline int xsch(struct subchannel_id schid) 252 { 253 register struct subchannel_id reg1 asm("1") = schid; 254 int ccode; 255 256 asm volatile( 257 " .insn rre,0xb2760000,%1,0\n" 258 " ipm %0\n" 259 " srl %0,28" 260 : "=d" (ccode) 261 : "d" (reg1) 262 : "cc"); 263 return ccode; 264 } 265 266 #endif 267