include/asm-powerpc/iseries/vio.h

   1 /* -*- linux-c -*-
   2  *
   3  *  iSeries Virtual I/O Message Path header
   4  *
   5  *  Authors: Dave Boutcher <boutcher@us.ibm.com>
   6  *           Ryan Arnold <ryanarn@us.ibm.com>
   7  *           Colin Devilbiss <devilbis@us.ibm.com>
   8  *
   9  * (C) Copyright 2000 IBM Corporation
  10  *
  11  * This header file is used by the iSeries virtual I/O device
  12  * drivers.  It defines the interfaces to the common functions
  13  * (implemented in drivers/char/viopath.h) as well as defining
  14  * common functions and structures.  Currently (at the time I
  15  * wrote this comment) the iSeries virtual I/O device drivers
  16  * that use this are
  17  *   drivers/block/viodasd.c
  18  *   drivers/char/viocons.c
  19  *   drivers/char/viotape.c
  20  *   drivers/cdrom/viocd.c
  21  *
  22  * The iSeries virtual ethernet support (veth.c) uses a whole
  23  * different set of functions.
  24  *
  25  * This program is free software;  you can redistribute it and/or
  26  * modify it under the terms of the GNU General Public License as
  27  * published by the Free Software Foundation; either version 2 of the
  28  * License, or (at your option) anyu later version.
  29  *
  30  * This program is distributed in the hope that it will be useful, but
  31  * WITHOUT ANY WARRANTY; without even the implied warranty of
  32  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  33  * General Public License for more details.
  34  *
  35  * You should have received a copy of the GNU General Public License
  36  * along with this program; if not, write to the Free Software Foundation,
  37  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  38  *
  39  */
  40 #ifndef _ASM_POWERPC_ISERIES_VIO_H
  41 #define _ASM_POWERPC_ISERIES_VIO_H
  42
  43 #include <asm/iseries/hv_types.h>
  44 #include <asm/iseries/hv_lp_event.h>
  45
  46 /*
  47  * iSeries virtual I/O events use the subtype field in
  48  * HvLpEvent to figure out what kind of vio event is coming
  49  * in.  We use a table to route these, and this defines
  50  * the maximum number of distinct subtypes
  51  */
  52 #define VIO_MAX_SUBTYPES 8
  53
  54 #define VIOMAXBLOCKDMA  12
  55
  56 struct open_data {
  57         u64     disk_size;
  58         u16     max_disk;
  59         u16     cylinders;
  60         u16     tracks;
  61         u16     sectors;
  62         u16     bytes_per_sector;
  63 };
  64
  65 struct rw_data {
  66         u64     offset;
  67         struct {
  68                 u32     token;
  69                 u32     reserved;
  70                 u64     len;
  71         } dma_info[VIOMAXBLOCKDMA];
  72 };
  73
  74 struct vioblocklpevent {
  75         struct HvLpEvent        event;
  76         u32                     reserved;
  77         u16                     version;
  78         u16                     sub_result;
  79         u16                     disk;
  80         u16                     flags;
  81         union {
  82                 struct open_data        open_data;
  83                 struct rw_data          rw_data;
  84                 u64                     changed;
  85         } u;
  86 };
  87
  88 #define vioblockflags_ro   0x0001
  89
  90 enum vioblocksubtype {
  91         vioblockopen = 0x0001,
  92         vioblockclose = 0x0002,
  93         vioblockread = 0x0003,
  94         vioblockwrite = 0x0004,
  95         vioblockflush = 0x0005,
  96         vioblockcheck = 0x0007
  97 };
  98
  99 struct viocdlpevent {
 100         struct HvLpEvent        event;
 101         u32                     reserved;
 102         u16                     version;
 103         u16                     sub_result;
 104         u16                     disk;
 105         u16                     flags;
 106         u32                     token;
 107         u64                     offset;         /* On open, max number of disks */
 108         u64                     len;            /* On open, size of the disk */
 109         u32                     block_size;     /* Only set on open */
 110         u32                     media_size;     /* Only set on open */
 111 };
 112
 113 enum viocdsubtype {
 114         viocdopen = 0x0001,
 115         viocdclose = 0x0002,
 116         viocdread = 0x0003,
 117         viocdwrite = 0x0004,
 118         viocdlockdoor = 0x0005,
 119         viocdgetinfo = 0x0006,
 120         viocdcheck = 0x0007
 121 };
 122
 123 struct viotapelpevent {
 124         struct HvLpEvent event;
 125         u32 reserved;
 126         u16 version;
 127         u16 sub_type_result;
 128         u16 tape;
 129         u16 flags;
 130         u32 token;
 131         u64 len;
 132         union {
 133                 struct {
 134                         u32 tape_op;
 135                         u32 count;
 136                 } op;
 137                 struct {
 138                         u32 type;
 139                         u32 resid;
 140                         u32 dsreg;
 141                         u32 gstat;
 142                         u32 erreg;
 143                         u32 file_no;
 144                         u32 block_no;
 145                 } get_status;
 146                 struct {
 147                         u32 block_no;
 148                 } get_pos;
 149         } u;
 150 };
 151
 152 enum viotapesubtype {
 153         viotapeopen = 0x0001,
 154         viotapeclose = 0x0002,
 155         viotaperead = 0x0003,
 156         viotapewrite = 0x0004,
 157         viotapegetinfo = 0x0005,
 158         viotapeop = 0x0006,
 159         viotapegetpos = 0x0007,
 160         viotapesetpos = 0x0008,
 161         viotapegetstatus = 0x0009
 162 };
 163
 164 /*
 165  * Each subtype can register a handler to process their events.
 166  * The handler must have this interface.
 167  */
 168 typedef void (vio_event_handler_t) (struct HvLpEvent * event);
 169
 170 extern int viopath_open(HvLpIndex remoteLp, int subtype, int numReq);
 171 extern int viopath_close(HvLpIndex remoteLp, int subtype, int numReq);
 172 extern int vio_setHandler(int subtype, vio_event_handler_t * beh);
 173 extern int vio_clearHandler(int subtype);
 174 extern int viopath_isactive(HvLpIndex lp);
 175 extern HvLpInstanceId viopath_sourceinst(HvLpIndex lp);
 176 extern HvLpInstanceId viopath_targetinst(HvLpIndex lp);
 177 extern void vio_set_hostlp(void);
 178 extern void *vio_get_event_buffer(int subtype);
 179 extern void vio_free_event_buffer(int subtype, void *buffer);
 180
 181 extern struct vio_dev *vio_create_viodasd(u32 unit);
 182
 183 extern HvLpIndex viopath_hostLp;
 184 extern HvLpIndex viopath_ourLp;
 185
 186 #define VIOCHAR_MAX_DATA        200
 187
 188 #define VIOMAJOR_SUBTYPE_MASK   0xff00
 189 #define VIOMINOR_SUBTYPE_MASK   0x00ff
 190 #define VIOMAJOR_SUBTYPE_SHIFT  8
 191
 192 #define VIOVERSION              0x0101
 193
 194 /*
 195  * This is the general structure for VIO errors; each module should have
 196  * a table of them, and each table should be terminated by an entry of
 197  * { 0, 0, NULL }.  Then, to find a specific error message, a module
 198  * should pass its local table and the return code.
 199  */
 200 struct vio_error_entry {
 201         u16 rc;
 202         int errno;
 203         const char *msg;
 204 };
 205 extern const struct vio_error_entry *vio_lookup_rc(
 206                 const struct vio_error_entry *local_table, u16 rc);
 207
 208 enum viosubtypes {
 209         viomajorsubtype_monitor = 0x0100,
 210         viomajorsubtype_blockio = 0x0200,
 211         viomajorsubtype_chario = 0x0300,
 212         viomajorsubtype_config = 0x0400,
 213         viomajorsubtype_cdio = 0x0500,
 214         viomajorsubtype_tape = 0x0600,
 215         viomajorsubtype_scsi = 0x0700
 216 };
 217
 218 enum vioconfigsubtype {
 219         vioconfigget = 0x0001,
 220 };
 221
 222 enum viorc {
 223         viorc_good = 0x0000,
 224         viorc_noConnection = 0x0001,
 225         viorc_noReceiver = 0x0002,
 226         viorc_noBufferAvailable = 0x0003,
 227         viorc_invalidMessageType = 0x0004,
 228         viorc_invalidRange = 0x0201,
 229         viorc_invalidToken = 0x0202,
 230         viorc_DMAError = 0x0203,
 231         viorc_useError = 0x0204,
 232         viorc_releaseError = 0x0205,
 233         viorc_invalidDisk = 0x0206,
 234         viorc_openRejected = 0x0301
 235 };
 236
 237 /*
 238  * The structure of the events that flow between us and OS/400 for chario
 239  * events.  You can't mess with this unless the OS/400 side changes too.
 240  */
 241 struct viocharlpevent {
 242         struct HvLpEvent event;
 243         u32 reserved;
 244         u16 version;
 245         u16 subtype_result_code;
 246         u8 virtual_device;
 247         u8 len;
 248         u8 data[VIOCHAR_MAX_DATA];
 249 };
 250
 251 #define VIOCHAR_WINDOW          10
 252
 253 enum viocharsubtype {
 254         viocharopen = 0x0001,
 255         viocharclose = 0x0002,
 256         viochardata = 0x0003,
 257         viocharack = 0x0004,
 258         viocharconfig = 0x0005
 259 };
 260
 261 enum viochar_rc {
 262         viochar_rc_ebusy = 1
 263 };
 264
 265 #endif /* _ASM_POWERPC_ISERIES_VIO_H */