include/asm-sparc64/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
  12 #include <asm/ldc.h>
  13 #include <asm/mdesc.h>
  14
  15 struct vio_msg_tag {
  16         u8                      type;
  17 #define VIO_TYPE_CTRL           0x01
  18 #define VIO_TYPE_DATA           0x02
  19 #define VIO_TYPE_ERR            0x04
  20
  21         u8                      stype;
  22 #define VIO_SUBTYPE_INFO        0x01
  23 #define VIO_SUBTYPE_ACK         0x02
  24 #define VIO_SUBTYPE_NACK        0x04
  25
  26         u16                     stype_env;
  27 #define VIO_VER_INFO            0x0001
  28 #define VIO_ATTR_INFO           0x0002
  29 #define VIO_DRING_REG           0x0003
  30 #define VIO_DRING_UNREG         0x0004
  31 #define VIO_RDX                 0x0005
  32 #define VIO_PKT_DATA            0x0040
  33 #define VIO_DESC_DATA           0x0041
  34 #define VIO_DRING_DATA          0x0042
  35 #define VNET_MCAST_INFO         0x0101
  36
  37         u32             sid;
  38 };
  39
  40 struct vio_rdx {
  41         struct vio_msg_tag      tag;
  42         u64                     resv[6];
  43 };
  44
  45 struct vio_ver_info {
  46         struct vio_msg_tag      tag;
  47         u16                     major;
  48         u16                     minor;
  49         u8                      dev_class;
  50 #define VDEV_NETWORK            0x01
  51 #define VDEV_NETWORK_SWITCH     0x02
  52 #define VDEV_DISK               0x03
  53 #define VDEV_DISK_SERVER        0x04
  54
  55         u8                      resv1[3];
  56         u64                     resv2[5];
  57 };
  58
  59 struct vio_dring_register {
  60         struct vio_msg_tag      tag;
  61         u64                     dring_ident;
  62         u32                     num_descr;
  63         u32                     descr_size;
  64         u16                     options;
  65 #define VIO_TX_DRING            0x0001
  66 #define VIO_RX_DRING            0x0002
  67         u16                     resv;
  68         u32                     num_cookies;
  69         struct ldc_trans_cookie cookies[0];
  70 };
  71
  72 struct vio_dring_unregister {
  73         struct vio_msg_tag      tag;
  74         u64                     dring_ident;
  75         u64                     resv[5];
  76 };
  77
  78 /* Data transfer modes */
  79 #define VIO_PKT_MODE            0x01 /* Packet based transfer   */
  80 #define VIO_DESC_MODE           0x02 /* In-band descriptors     */
  81 #define VIO_DRING_MODE          0x03 /* Descriptor rings        */
  82
  83 struct vio_dring_data {
  84         struct vio_msg_tag      tag;
  85         u64                     seq;
  86         u64                     dring_ident;
  87         u32                     start_idx;
  88         u32                     end_idx;
  89         u8                      state;
  90 #define VIO_DRING_ACTIVE        0x01
  91 #define VIO_DRING_STOPPED       0x02
  92
  93         u8                      __pad1;
  94         u16                     __pad2;
  95         u32                     __pad3;
  96         u64                     __par4[2];
  97 };
  98
  99 struct vio_dring_hdr {
 100         u8                      state;
 101 #define VIO_DESC_FREE           0x01
 102 #define VIO_DESC_READY          0x02
 103 #define VIO_DESC_ACCEPTED       0x03
 104 #define VIO_DESC_DONE           0x04
 105         u8                      ack;
 106 #define VIO_ACK_ENABLE          0x01
 107 #define VIO_ACK_DISABLE         0x00
 108
 109         u16                     __pad1;
 110         u32                     __pad2;
 111 };
 112
 113 /* VIO disk specific structures and defines */
 114 struct vio_disk_attr_info {
 115         struct vio_msg_tag      tag;
 116         u8                      xfer_mode;
 117         u8                      vdisk_type;
 118 #define VD_DISK_TYPE_SLICE      0x01 /* Slice in block device   */
 119 #define VD_DISK_TYPE_DISK       0x02 /* Entire block device     */
 120         u16                     resv1;
 121         u32                     vdisk_block_size;
 122         u64                     operations;
 123         u64                     vdisk_size;
 124         u64                     max_xfer_size;
 125         u64                     resv2[2];
 126 };
 127
 128 struct vio_disk_desc {
 129         struct vio_dring_hdr    hdr;
 130         u64                     req_id;
 131         u8                      operation;
 132 #define VD_OP_BREAD             0x01 /* Block read                      */
 133 #define VD_OP_BWRITE            0x02 /* Block write                     */
 134 #define VD_OP_FLUSH             0x03 /* Flush disk contents             */
 135 #define VD_OP_GET_WCE           0x04 /* Get write-cache status          */
 136 #define VD_OP_SET_WCE           0x05 /* Enable/disable write-cache      */
 137 #define VD_OP_GET_VTOC          0x06 /* Get VTOC                        */
 138 #define VD_OP_SET_VTOC          0x07 /* Set VTOC                        */
 139 #define VD_OP_GET_DISKGEOM      0x08 /* Get disk geometry               */
 140 #define VD_OP_SET_DISKGEOM      0x09 /* Set disk geometry               */
 141 #define VD_OP_SCSICMD           0x0a /* SCSI control command            */
 142 #define VD_OP_GET_DEVID         0x0b /* Get device ID                   */
 143 #define VD_OP_GET_EFI           0x0c /* Get EFI                         */
 144 #define VD_OP_SET_EFI           0x0d /* Set EFI                         */
 145         u8                      slice;
 146         u16                     resv1;
 147         u32                     status;
 148         u64                     offset;
 149         u64                     size;
 150         u32                     ncookies;
 151         u32                     resv2;
 152         struct ldc_trans_cookie cookies[0];
 153 };
 154
 155 #define VIO_DISK_VNAME_LEN      8
 156 #define VIO_DISK_ALABEL_LEN     128
 157 #define VIO_DISK_NUM_PART       8
 158
 159 struct vio_disk_vtoc {
 160         u8                      volume_name[VIO_DISK_VNAME_LEN];
 161         u16                     sector_size;
 162         u16                     num_partitions;
 163         u8                      ascii_label[VIO_DISK_ALABEL_LEN];
 164         struct {
 165                 u16             id;
 166                 u16             perm_flags;
 167                 u32             resv;
 168                 u64             start_block;
 169                 u64             num_blocks;
 170         } partitions[VIO_DISK_NUM_PART];
 171 };
 172
 173 struct vio_disk_geom {
 174         u16                     num_cyl; /* Num data cylinders          */
 175         u16                     alt_cyl; /* Num alternate cylinders     */
 176         u16                     beg_cyl; /* Cyl off of fixed head area  */
 177         u16                     num_hd;  /* Num heads                   */
 178         u16                     num_sec; /* Num sectors                 */
 179         u16                     ifact;   /* Interleave factor           */
 180         u16                     apc;     /* Alts per cylinder (SCSI)    */
 181         u16                     rpm;     /* Revolutions per minute      */
 182         u16                     phy_cyl; /* Num physical cylinders      */
 183         u16                     wr_skip; /* Num sects to skip, writes   */
 184         u16                     rd_skip; /* Num sects to skip, writes   */
 185 };
 186
 187 struct vio_disk_devid {
 188         u16                     resv;
 189         u16                     type;
 190         u32                     len;
 191         char                    id[0];
 192 };
 193
 194 struct vio_disk_efi {
 195         u64                     lba;
 196         u64                     len;
 197         char                    data[0];
 198 };
 199
 200 /* VIO net specific structures and defines */
 201 struct vio_net_attr_info {
 202         struct vio_msg_tag      tag;
 203         u8                      xfer_mode;
 204         u8                      addr_type;
 205 #define VNET_ADDR_ETHERMAC      0x01
 206         u16                     ack_freq;
 207         u32                     resv1;
 208         u64                     addr;
 209         u64                     mtu;
 210         u64                     resv2[3];
 211 };
 212
 213 #define VNET_NUM_MCAST          7
 214
 215 struct vio_net_mcast_info {
 216         struct vio_msg_tag      tag;
 217         u8                      set;
 218         u8                      count;
 219         u8                      mcast_addr[VNET_NUM_MCAST * 6];
 220         u32                     resv;
 221 };
 222
 223 struct vio_net_desc {
 224         struct vio_dring_hdr    hdr;
 225         u32                     size;
 226         u32                     ncookies;
 227         struct ldc_trans_cookie cookies[0];
 228 };
 229
 230 #define VIO_MAX_RING_COOKIES    24
 231
 232 struct vio_dring_state {
 233         u64                     ident;
 234         void                    *base;
 235         u64                     snd_nxt;
 236         u64                     rcv_nxt;
 237         u32                     entry_size;
 238         u32                     num_entries;
 239         u32                     prod;
 240         u32                     cons;
 241         u32                     pending;
 242         int                     ncookies;
 243         struct ldc_trans_cookie cookies[VIO_MAX_RING_COOKIES];
 244 };
 245
 246 static inline void *vio_dring_cur(struct vio_dring_state *dr)
 247 {
 248         return dr->base + (dr->entry_size * dr->prod);
 249 }
 250
 251 static inline void *vio_dring_entry(struct vio_dring_state *dr,
 252                                     unsigned int index)
 253 {
 254         return dr->base + (dr->entry_size * index);
 255 }
 256
 257 static inline u32 vio_dring_avail(struct vio_dring_state *dr,
 258                                   unsigned int ring_size)
 259 {
 260         /* Ensure build-time power-of-2.  */
 261         BUILD_BUG_ON(ring_size & (ring_size - 1));
 262
 263         return (dr->pending -
 264                 ((dr->prod - dr->cons) & (ring_size - 1)));
 265 }
 266
 267 #define VIO_MAX_TYPE_LEN        32
 268 #define VIO_MAX_COMPAT_LEN      64
 269
 270 struct vio_dev {
 271         u64                     mp;
 272         struct device_node      *dp;
 273
 274         char                    type[VIO_MAX_TYPE_LEN];
 275         char                    compat[VIO_MAX_COMPAT_LEN];
 276         int                     compat_len;
 277
 278         u64                     dev_no;
 279
 280         unsigned long           channel_id;
 281
 282         unsigned int            tx_irq;
 283         unsigned int            rx_irq;
 284
 285         struct device           dev;
 286 };
 287
 288 struct vio_driver {
 289         struct list_head                node;
 290         const struct vio_device_id      *id_table;
 291         int (*probe)(struct vio_dev *dev, const struct vio_device_id *id);
 292         int (*remove)(struct vio_dev *dev);
 293         void (*shutdown)(struct vio_dev *dev);
 294         unsigned long                   driver_data;
 295         struct device_driver            driver;
 296 };
 297
 298 struct vio_version {
 299         u16             major;
 300         u16             minor;
 301 };
 302
 303 struct vio_driver_state;
 304 struct vio_driver_ops {
 305         int     (*send_attr)(struct vio_driver_state *vio);
 306         int     (*handle_attr)(struct vio_driver_state *vio, void *pkt);
 307         void    (*handshake_complete)(struct vio_driver_state *vio);
 308 };
 309
 310 struct vio_completion {
 311         struct completion       com;
 312         int                     err;
 313         int                     waiting_for;
 314 };
 315
 316 struct vio_driver_state {
 317         /* Protects VIO handshake and, optionally, driver private state.  */
 318         spinlock_t              lock;
 319
 320         struct ldc_channel      *lp;
 321
 322         u32                     _peer_sid;
 323         u32                     _local_sid;
 324         struct vio_dring_state  drings[2];
 325 #define VIO_DRIVER_TX_RING      0
 326 #define VIO_DRIVER_RX_RING      1
 327
 328         u8                      hs_state;
 329 #define VIO_HS_INVALID          0x00
 330 #define VIO_HS_GOTVERS          0x01
 331 #define VIO_HS_GOT_ATTR         0x04
 332 #define VIO_HS_SENT_DREG        0x08
 333 #define VIO_HS_SENT_RDX         0x10
 334 #define VIO_HS_GOT_RDX_ACK      0x20
 335 #define VIO_HS_GOT_RDX          0x40
 336 #define VIO_HS_SENT_RDX_ACK     0x80
 337 #define VIO_HS_COMPLETE         (VIO_HS_GOT_RDX_ACK | VIO_HS_SENT_RDX_ACK)
 338
 339         u8                      dev_class;
 340
 341         u8                      dr_state;
 342 #define VIO_DR_STATE_TXREG      0x01
 343 #define VIO_DR_STATE_RXREG      0x02
 344 #define VIO_DR_STATE_TXREQ      0x10
 345 #define VIO_DR_STATE_RXREQ      0x20
 346
 347         u8                      debug;
 348 #define VIO_DEBUG_HS            0x01
 349 #define VIO_DEBUG_DATA          0x02
 350
 351         void                    *desc_buf;
 352         unsigned int            desc_buf_len;
 353
 354         struct vio_completion   *cmp;
 355
 356         struct vio_dev          *vdev;
 357
 358         struct timer_list       timer;
 359
 360         struct vio_version      ver;
 361
 362         struct vio_version      *ver_table;
 363         int                     ver_table_entries;
 364
 365         char                    *name;
 366
 367         struct vio_driver_ops   *ops;
 368 };
 369
 370 #define viodbg(TYPE, f, a...) \
 371 do {    if (vio->debug & VIO_DEBUG_##TYPE) \
 372                 printk(KERN_INFO "vio: ID[%lu] " f, \
 373                        vio->vdev->channel_id, ## a); \
 374 } while (0)
 375
 376 extern int vio_register_driver(struct vio_driver *drv);
 377 extern void vio_unregister_driver(struct vio_driver *drv);
 378
 379 static inline struct vio_driver *to_vio_driver(struct device_driver *drv)
 380 {
 381         return container_of(drv, struct vio_driver, driver);
 382 }
 383
 384 static inline struct vio_dev *to_vio_dev(struct device *dev)
 385 {
 386         return container_of(dev, struct vio_dev, dev);
 387 }
 388
 389 extern int vio_ldc_send(struct vio_driver_state *vio, void *data, int len);
 390 extern void vio_link_state_change(struct vio_driver_state *vio, int event);
 391 extern void vio_conn_reset(struct vio_driver_state *vio);
 392 extern int vio_control_pkt_engine(struct vio_driver_state *vio, void *pkt);
 393 extern int vio_validate_sid(struct vio_driver_state *vio,
 394                             struct vio_msg_tag *tp);
 395 extern u32 vio_send_sid(struct vio_driver_state *vio);
 396 extern int vio_ldc_alloc(struct vio_driver_state *vio,
 397                          struct ldc_channel_config *base_cfg, void *event_arg);
 398 extern void vio_ldc_free(struct vio_driver_state *vio);
 399 extern int vio_driver_init(struct vio_driver_state *vio, struct vio_dev *vdev,
 400                            u8 dev_class, struct vio_version *ver_table,
 401                            int ver_table_size, struct vio_driver_ops *ops,
 402                            char *name);
 403
 404 extern void vio_port_up(struct vio_driver_state *vio);
 405
 406 #endif /* _SPARC64_VIO_H */