arch/sparc/include/asm/vio.h

   1 #ifndef _SPARC64_VIO_H
   2 #define _SPARC64_VIO_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/device.h>
   6 #include <linux/mod_devicetable.h>
   7 #include <linux/timer.h>
   8 #include <linux/spinlock.h>
   9 #include <linux/completion.h>
  10 #include <linux/list.h>
  11 #include <linux/log2.h>
  12
  13 #include <asm/ldc.h>
  14 #include <asm/mdesc.h>
  15
  16 struct vio_msg_tag {
  17         u8                      type;
  18 #define VIO_TYPE_CTRL           0x01
  19 #define VIO_TYPE_DATA           0x02
  20 #define VIO_TYPE_ERR            0x04
  21
  22         u8                      stype;
  23 #define VIO_SUBTYPE_INFO        0x01
  24 #define VIO_SUBTYPE_ACK         0x02
  25 #define VIO_SUBTYPE_NACK        0x04
  26
  27         u16                     stype_env;
  28 #define VIO_VER_INFO            0x0001
  29 #define VIO_ATTR_INFO           0x0002
  30 #define VIO_DRING_REG           0x0003
  31 #define VIO_DRING_UNREG         0x0004
  32 #define VIO_RDX                 0x0005
  33 #define VIO_PKT_DATA            0x0040
  34 #define VIO_DESC_DATA           0x0041
  35 #define VIO_DRING_DATA          0x0042
  36 #define VNET_MCAST_INFO         0x0101
  37
  38         u32             sid;
  39 };
  40
  41 struct vio_rdx {
  42         struct vio_msg_tag      tag;
  43         u64                     resv[6];
  44 };
  45
  46 struct vio_ver_info {
  47         struct vio_msg_tag      tag;
  48         u16                     major;
  49         u16                     minor;
  50         u8                      dev_class;
  51 #define VDEV_NETWORK            0x01
  52 #define VDEV_NETWORK_SWITCH     0x02
  53 #define VDEV_DISK               0x03
  54 #define VDEV_DISK_SERVER        0x04
  55
  56         u8                      resv1[3];
  57         u64                     resv2[5];
  58 };
  59
  60 struct vio_dring_register {
  61         struct vio_msg_tag      tag;
  62         u64                     dring_ident;
  63         u32                     num_descr;
  64         u32                     descr_size;
  65         u16                     options;
  66 #define VIO_TX_DRING            0x0001
  67 #define VIO_RX_DRING            0x0002
  68         u16                     resv;
  69         u32                     num_cookies;
  70         struct ldc_trans_cookie cookies[0];
  71 };
  72
  73 struct vio_dring_unregister {
  74         struct vio_msg_tag      tag;
  75         u64                     dring_ident;
  76         u64                     resv[5];
  77 };
  78
  79 /* Data transfer modes */
  80 #define VIO_PKT_MODE            0x01 /* Packet based transfer   */
  81 #define VIO_DESC_MODE           0x02 /* In-band descriptors     */
  82 #define VIO_DRING_MODE          0x03 /* Descriptor rings        */
  83
  84 struct vio_dring_data {
  85         struct vio_msg_tag      tag;
  86         u64                     seq;
  87         u64                     dring_ident;
  88         u32                     start_idx;
  89         u32                     end_idx;
  90         u8                      state;
  91 #define VIO_DRING_ACTIVE        0x01
  92 #define VIO_DRING_STOPPED       0x02
  93
  94         u8                      __pad1;
  95         u16                     __pad2;
  96         u32                     __pad3;
  97         u64                     __par4[2];
  98 };
  99
 100 struct vio_dring_hdr {
 101         u8                      state;
 102 #define VIO_DESC_FREE           0x01
 103 #define VIO_DESC_READY          0x02
 104 #define VIO_DESC_ACCEPTED       0x03
 105 #define VIO_DESC_DONE           0x04
 106         u8                      ack;
 107 #define VIO_ACK_ENABLE          0x01
 108 #define VIO_ACK_DISABLE         0x00
 109
 110         u16                     __pad1;
 111         u32                     __pad2;
 112 };
 113
 114 /* VIO disk specific structures and defines */
 115 struct vio_disk_attr_info {
 116         struct vio_msg_tag      tag;
 117         u8                      xfer_mode;
 118         u8                      vdisk_type;
 119 #define VD_DISK_TYPE_SLICE      0x01 /* Slice in block device   */
 120 #define VD_DISK_TYPE_DISK       0x02 /* Entire block device     */
 121         u16                     resv1;
 122         u32                     vdisk_block_size;
 123         u64                     operations;
 124         u64                     vdisk_size;
 125         u64                     max_xfer_size;
 126         u64                     resv2[2];
 127 };
 128
 129 struct vio_disk_desc {
 130         struct vio_dring_hdr    hdr;
 131         u64                     req_id;
 132         u8                      operation;
 133 #define VD_OP_BREAD             0x01 /* Block read                      */
 134 #define VD_OP_BWRITE            0x02 /* Block write                     */
 135 #define VD_OP_FLUSH             0x03 /* Flush disk contents             */
 136 #define VD_OP_GET_WCE           0x04 /* Get write-cache status          */
 137 #define VD_OP_SET_WCE           0x05 /* Enable/disable write-cache      */
 138 #define VD_OP_GET_VTOC          0x06 /* Get VTOC                        */
 139 #define VD_OP_SET_VTOC          0x07 /* Set VTOC                        */
 140 #define VD_OP_GET_DISKGEOM      0x08 /* Get disk geometry               */
 141 #define VD_OP_SET_DISKGEOM      0x09 /* Set disk geometry               */
 142 #define VD_OP_SCSICMD           0x0a /* SCSI control command            */
 143 #define VD_OP_GET_DEVID         0x0b /* Get device ID                   */
 144 #define VD_OP_GET_EFI           0x0c /* Get EFI                         */
 145 #define VD_OP_SET_EFI           0x0d /* Set EFI                         */
 146         u8                      slice;
 147         u16                     resv1;
 148         u32                     status;
 149         u64                     offset;
 150         u64                     size;
 151         u32                     ncookies;
 152         u32                     resv2;
 153         struct ldc_trans_cookie cookies[0];
 154 };
 155
 156 #define VIO_DISK_VNAME_LEN      8
 157 #define VIO_DISK_ALABEL_LEN     128
 158 #define VIO_DISK_NUM_PART       8
 159
 160 struct vio_disk_vtoc {
 161         u8                      volume_name[VIO_DISK_VNAME_LEN];
 162         u16                     sector_size;
 163         u16                     num_partitions;
 164         u8                      ascii_label[VIO_DISK_ALABEL_LEN];
 165         struct {
 166                 u16             id;
 167                 u16             perm_flags;
 168                 u32             resv;
 169                 u64             start_block;
 170                 u64             num_blocks;
 171         } partitions[VIO_DISK_NUM_PART];
 172 };
 173
 174 struct vio_disk_geom {
 175         u16                     num_cyl; /* Num data cylinders          */
 176         u16                     alt_cyl; /* Num alternate cylinders     */
 177         u16                     beg_cyl; /* Cyl off of fixed head area  */
 178         u16                     num_hd;  /* Num heads                   */
 179         u16                     num_sec; /* Num sectors                 */
 180         u16                     ifact;   /* Interleave factor           */
 181         u16                     apc;     /* Alts per cylinder (SCSI)    */
 182         u16                     rpm;     /* Revolutions per minute      */
 183         u16                     phy_cyl; /* Num physical cylinders      */
 184         u16                     wr_skip; /* Num sects to skip, writes   */
 185         u16                     rd_skip; /* Num sects to skip, writes   */
 186 };
 187
 188 struct vio_disk_devid {
 189         u16                     resv;
 190         u16                     type;
 191         u32                     len;
 192         char                    id[0];
 193 };
 194
 195 struct vio_disk_efi {
 196         u64                     lba;
 197         u64                     len;
 198         char                    data[0];
 199 };
 200
 201 /* VIO net specific structures and defines */
 202 struct vio_net_attr_info {
 203         struct vio_msg_tag      tag;
 204         u8                      xfer_mode;
 205         u8                      addr_type;
 206 #define VNET_ADDR_ETHERMAC      0x01
 207         u16                     ack_freq;
 208         u32                     resv1;
 209         u64                     addr;
 210         u64                     mtu;
 211         u64                     resv2[3];
 212 };
 213
 214 #define VNET_NUM_MCAST          7
 215
 216 struct vio_net_mcast_info {
 217         struct vio_msg_tag      tag;
 218         u8                      set;
 219         u8                      count;
 220         u8                      mcast_addr[VNET_NUM_MCAST * 6];
 221         u32                     resv;
 222 };
 223
 224 struct vio_net_desc {
 225         struct vio_dring_hdr    hdr;
 226         u32                     size;
 227         u32                     ncookies;
 228         struct ldc_trans_cookie cookies[0];
 229 };
 230
 231 #define VIO_MAX_RING_COOKIES    24
 232
 233 struct vio_dring_state {
 234         u64                     ident;
 235         void                    *base;
 236         u64                     snd_nxt;
 237         u64                     rcv_nxt;
 238         u32                     entry_size;
 239         u32                     num_entries;
 240         u32                     prod;
 241         u32                     cons;
 242         u32                     pending;
 243         int                     ncookies;
 244         struct ldc_trans_cookie cookies[VIO_MAX_RING_COOKIES];
 245 };
 246
 247 static inline void *vio_dring_cur(struct vio_dring_state *dr)
 248 {
 249         return dr->base + (dr->entry_size * dr->prod);
 250 }
 251
 252 static inline void *vio_dring_entry(struct vio_dring_state *dr,
 253                                     unsigned int index)
 254 {
 255         return dr->base + (dr->entry_size * index);
 256 }
 257
 258 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
 259                                   unsigned int ring_size)
 260 {
 261         return (dr->pending -
 262                 ((dr->prod - dr->cons) & (ring_size - 1)));
 263 }
 264
 265 #define VIO_MAX_TYPE_LEN        32
 266 #define VIO_MAX_COMPAT_LEN      64
 267
 268 struct vio_dev {
 269         u64                     mp;
 270         struct device_node      *dp;
 271
 272         char                    type[VIO_MAX_TYPE_LEN];
 273         char                    compat[VIO_MAX_COMPAT_LEN];
 274         int                     compat_len;
 275
 276         u64                     dev_no;
 277
 278         unsigned long           channel_id;
 279
 280         unsigned int            tx_irq;
 281         unsigned int            rx_irq;
 282
 283         struct device           dev;
 284 };
 285
 286 struct vio_driver {
 287         const char                      *name;
 288         struct list_head                node;
 289         const struct vio_device_id      *id_table;
 290         int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
 291         int (*remove)(struct vio_dev *dev);
 292         void (*shutdown)(struct vio_dev *dev);
 293         unsigned long                   driver_data;
 294         struct device_driver            driver;
 295 };
 296
 297 struct vio_version {
 298         u16             major;
 299         u16             minor;
 300 };
 301
 302 struct vio_driver_state;
 303 struct vio_driver_ops {
 304         int     (*send_attr)(struct vio_driver_state *vio);
 305         int     (*handle_attr)(struct vio_driver_state *vio, void *pkt);
 306         void    (*handshake_complete)(struct vio_driver_state *vio);
 307 };
 308
 309 struct vio_completion {
 310         struct completion       com;
 311         int                     err;
 312         int                     waiting_for;
 313 };
 314
 315 struct vio_driver_state {
 316         /* Protects VIO handshake and, optionally, driver private state.  */
 317         spinlock_t              lock;
 318
 319         struct ldc_channel      *lp;
 320
 321         u32                     _peer_sid;
 322         u32                     _local_sid;
 323         struct vio_dring_state  drings[2];
 324 #define VIO_DRIVER_TX_RING      0
 325 #define VIO_DRIVER_RX_RING      1
 326
 327         u8                      hs_state;
 328 #define VIO_HS_INVALID          0x00
 329 #define VIO_HS_GOTVERS          0x01
 330 #define VIO_HS_GOT_ATTR         0x04
 331 #define VIO_HS_SENT_DREG        0x08
 332 #define VIO_HS_SENT_RDX         0x10
 333 #define VIO_HS_GOT_RDX_ACK      0x20
 334 #define VIO_HS_GOT_RDX          0x40
 335 #define VIO_HS_SENT_RDX_ACK     0x80
 336 #define VIO_HS_COMPLETE         (VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)
 337
 338         u8                      dev_class;
 339
 340         u8                      dr_state;
 341 #define VIO_DR_STATE_TXREG      0x01
 342 #define VIO_DR_STATE_RXREG      0x02
 343 #define VIO_DR_STATE_TXREQ      0x10
 344 #define VIO_DR_STATE_RXREQ      0x20
 345
 346         u8                      debug;
 347 #define VIO_DEBUG_HS            0x01
 348 #define VIO_DEBUG_DATA          0x02
 349
 350         void                    *desc_buf;
 351         unsigned int            desc_buf_len;
 352
 353         struct vio_completion   *cmp;
 354
 355         struct vio_dev          *vdev;
 356
 357         struct timer_list       timer;
 358
 359         struct vio_version      ver;
 360
 361         struct vio_version      *ver_table;
 362         int                     ver_table_entries;
 363
 364         char                    *name;
 365
 366         struct vio_driver_ops   *ops;
 367 };
 368
 369 #define viodbg(TYPE, f, a...) \
 370 do {    if (vio->debug & VIO_DEBUG_##TYPE) \
 371                 printk(KERN_INFO "vio: ID[%lu] " f, \
 372                        vio->vdev->channel_id, ## a); \
 373 } while (0)
 374
 375 extern int __vio_register_driver(struct vio_driver *drv, struct module *owner,
 376                                  const char *mod_name);
 377 /*
 378  * vio_register_driver must be a macro so that KBUILD_MODNAME can be expanded
 379  */
 380 #define vio_register_driver(driver)             \
 381         __vio_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 382 extern void vio_unregister_driver(struct vio_driver *drv);
 383
 384 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
 385 {
 386         return container_of(drv, struct vio_driver, driver);
 387 }
 388
 389 static inline struct vio_dev *to_vio_dev(struct device *dev)
 390 {
 391         return container_of(dev, struct vio_dev, dev);
 392 }
 393
 394 extern int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
 395 extern void vio_link_state_change(struct vio_driver_state *vio, int event);
 396 extern void vio_conn_reset(struct vio_driver_state *vio);
 397 extern int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
 398 extern int vio_validate_sid(struct vio_driver_state *vio,
 399                             struct vio_msg_tag *tp);
 400 extern u32 vio_send_sid(struct vio_driver_state *vio);
 401 extern int vio_ldc_alloc(struct vio_driver_state *vio,
 402                          struct ldc_channel_config *base_cfg, void *event_arg);
 403 extern void vio_ldc_free(struct vio_driver_state *vio);
 404 extern int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
 405                            u8 dev_class, struct vio_version *ver_table,
 406                            int ver_table_size, struct vio_driver_ops *ops,
 407                            char *name);
 408
 409 extern void vio_port_up(struct vio_driver_state *vio);
 410
 411 #endif /* _SPARC64_VIO_H */