LXR linux/drivers/s390/cio/io

   1#ifndef S390_IO_SCH_H
   2#define S390_IO_SCH_H
   3
   4#include <asm/schid.h>
   5
   6/*
   7 * command-mode operation request block
   8 */
   9struct cmd_orb {
  10        u32 intparm;    /* interruption parameter */
  11        u32 key  : 4;   /* flags, like key, suspend control, etc. */
  12        u32 spnd : 1;   /* suspend control */
  13        u32 res1 : 1;   /* reserved */
  14        u32 mod  : 1;   /* modification control */
  15        u32 sync : 1;   /* synchronize control */
  16        u32 fmt  : 1;   /* format control */
  17        u32 pfch : 1;   /* prefetch control */
  18        u32 isic : 1;   /* initial-status-interruption control */
  19        u32 alcc : 1;   /* address-limit-checking control */
  20        u32 ssic : 1;   /* suppress-suspended-interr. control */
  21        u32 res2 : 1;   /* reserved */
  22        u32 c64  : 1;   /* IDAW/QDIO 64 bit control  */
  23        u32 i2k  : 1;   /* IDAW 2/4kB block size control */
  24        u32 lpm  : 8;   /* logical path mask */
  25        u32 ils  : 1;   /* incorrect length */
  26        u32 zero : 6;   /* reserved zeros */
  27        u32 orbx : 1;   /* ORB extension control */
  28        u32 cpa;        /* channel program address */
  29}  __attribute__ ((packed, aligned(4)));
  30
  31/*
  32 * transport-mode operation request block
  33 */
  34struct tm_orb {
  35        u32 intparm;
  36        u32 key:4;
  37        u32 :9;
  38        u32 b:1;
  39        u32 :2;
  40        u32 lpm:8;
  41        u32 :7;
  42        u32 x:1;
  43        u32 tcw;
  44        u32 prio:8;
  45        u32 :8;
  46        u32 rsvpgm:8;
  47        u32 :8;
  48        u32 :32;
  49        u32 :32;
  50        u32 :32;
  51        u32 :32;
  52}  __attribute__ ((packed, aligned(4)));
  53
  54union orb {
  55        struct cmd_orb cmd;
  56        struct tm_orb tm;
  57}  __attribute__ ((packed, aligned(4)));
  58
  59struct io_subchannel_private {
  60        union orb orb;          /* operation request block */
  61        struct ccw1 sense_ccw;  /* static ccw for sense command */
  62} __attribute__ ((aligned(8)));
  63
  64#define to_io_private(n) ((struct io_subchannel_private *)n->private)
  65#define sch_get_cdev(n) (dev_get_drvdata(&n->dev))
  66#define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c))
  67
  68#define MAX_CIWS 8
  69
  70/*
  71 * sense-id response buffer layout
  72 */
  73struct senseid {
  74        /* common part */
  75        u8  reserved;   /* always 0x'FF' */
  76        u16 cu_type;    /* control unit type */
  77        u8  cu_model;   /* control unit model */
  78        u16 dev_type;   /* device type */
  79        u8  dev_model;  /* device model */
  80        u8  unused;     /* padding byte */
  81        /* extended part */
  82        struct ciw ciw[MAX_CIWS];       /* variable # of CIWs */
  83}  __attribute__ ((packed, aligned(4)));
  84
  85struct ccw_device_private {
  86        struct ccw_device *cdev;
  87        struct subchannel *sch;
  88        int state;              /* device state */
  89        atomic_t onoff;
  90        unsigned long registered;
  91        struct ccw_dev_id dev_id;       /* device id */
  92        struct subchannel_id schid;     /* subchannel number */
  93        u8 imask;               /* lpm mask for SNID/SID/SPGID */
  94        int iretry;             /* retry counter SNID/SID/SPGID */
  95        struct {
  96                unsigned int fast:1;    /* post with "channel end" */
  97                unsigned int repall:1;  /* report every interrupt status */
  98                unsigned int pgroup:1;  /* do path grouping */
  99                unsigned int force:1;   /* allow forced online */
 100        } __attribute__ ((packed)) options;
 101        struct {
 102                unsigned int pgid_single:1; /* use single path for Set PGID */
 103                unsigned int esid:1;        /* Ext. SenseID supported by HW */
 104                unsigned int dosense:1;     /* delayed SENSE required */
 105                unsigned int doverify:1;    /* delayed path verification */
 106                unsigned int donotify:1;    /* call notify function */
 107                unsigned int recog_done:1;  /* dev. recog. complete */
 108                unsigned int fake_irb:1;    /* deliver faked irb */
 109                unsigned int intretry:1;    /* retry internal operation */
 110                unsigned int resuming:1;    /* recognition while resume */
 111        } __attribute__((packed)) flags;
 112        unsigned long intparm;  /* user interruption parameter */
 113        struct qdio_irq *qdio_data;
 114        struct irb irb;         /* device status */
 115        struct senseid senseid; /* SenseID info */
 116        struct pgid pgid[8];    /* path group IDs per chpid*/
 117        struct ccw1 iccws[2];   /* ccws for SNID/SID/SPGID commands */
 118        struct work_struct kick_work;
 119        wait_queue_head_t wait_q;
 120        struct timer_list timer;
 121        void *cmb;                      /* measurement information */
 122        struct list_head cmb_list;      /* list of measured devices */
 123        u64 cmb_start_time;             /* clock value of cmb reset */
 124        void *cmb_wait;                 /* deferred cmb enable/disable */
 125};
 126
 127static inline int ssch(struct subchannel_id schid, union orb *addr)
 128{
 129        register struct subchannel_id reg1 asm("1") = schid;
 130        int ccode = -EIO;
 131
 132        asm volatile(
 133                "       ssch    0(%2)\n"
 134                "0:     ipm     %0\n"
 135                "       srl     %0,28\n"
 136                "1:\n"
 137                EX_TABLE(0b, 1b)
 138                : "+d" (ccode)
 139                : "d" (reg1), "a" (addr), "m" (*addr)
 140                : "cc", "memory");
 141        return ccode;
 142}
 143
 144static inline int rsch(struct subchannel_id schid)
 145{
 146        register struct subchannel_id reg1 asm("1") = schid;
 147        int ccode;
 148
 149        asm volatile(
 150                "       rsch\n"
 151                "       ipm     %0\n"
 152                "       srl     %0,28"
 153                : "=d" (ccode)
 154                : "d" (reg1)
 155                : "cc", "memory");
 156        return ccode;
 157}
 158
 159static inline int csch(struct subchannel_id schid)
 160{
 161        register struct subchannel_id reg1 asm("1") = schid;
 162        int ccode;
 163
 164        asm volatile(
 165                "       csch\n"
 166                "       ipm     %0\n"
 167                "       srl     %0,28"
 168                : "=d" (ccode)
 169                : "d" (reg1)
 170                : "cc");
 171        return ccode;
 172}
 173
 174static inline int hsch(struct subchannel_id schid)
 175{
 176        register struct subchannel_id reg1 asm("1") = schid;
 177        int ccode;
 178
 179        asm volatile(
 180                "       hsch\n"
 181                "       ipm     %0\n"
 182                "       srl     %0,28"
 183                : "=d" (ccode)
 184                : "d" (reg1)
 185                : "cc");
 186        return ccode;
 187}
 188
 189static inline int xsch(struct subchannel_id schid)
 190{
 191        register struct subchannel_id reg1 asm("1") = schid;
 192        int ccode;
 193
 194        asm volatile(
 195                "       .insn   rre,0xb2760000,%1,0\n"
 196                "       ipm     %0\n"
 197                "       srl     %0,28"
 198                : "=d" (ccode)
 199                : "d" (reg1)
 200                : "cc");
 201        return ccode;
 202}
 203
 204#endif
 205