forked from Minki/linux
131 lines
4.0 KiB
C
131 lines
4.0 KiB
C
/* -*- linux-c -*-
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* drivers/char/vio.h
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*
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* iSeries Virtual I/O Message Path header
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*
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* Authors: Dave Boutcher <boutcher@us.ibm.com>
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* Ryan Arnold <ryanarn@us.ibm.com>
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* Colin Devilbiss <devilbis@us.ibm.com>
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*
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* (C) Copyright 2000 IBM Corporation
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*
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* This header file is used by the iSeries virtual I/O device
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* drivers. It defines the interfaces to the common functions
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* (implemented in drivers/char/viopath.h) as well as defining
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* common functions and structures. Currently (at the time I
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* wrote this comment) the iSeries virtual I/O device drivers
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* that use this are
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* drivers/block/viodasd.c
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* drivers/char/viocons.c
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* drivers/char/viotape.c
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* drivers/cdrom/viocd.c
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*
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* The iSeries virtual ethernet support (veth.c) uses a whole
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* different set of functions.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) anyu later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef _ASM_POWERPC_ISERIES_VIO_H
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#define _ASM_POWERPC_ISERIES_VIO_H
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#include <asm/iseries/hv_types.h>
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#include <asm/iseries/hv_lp_event.h>
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/*
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* iSeries virtual I/O events use the subtype field in
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* HvLpEvent to figure out what kind of vio event is coming
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* in. We use a table to route these, and this defines
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* the maximum number of distinct subtypes
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*/
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#define VIO_MAX_SUBTYPES 8
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/*
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* Each subtype can register a handler to process their events.
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* The handler must have this interface.
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*/
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typedef void (vio_event_handler_t) (struct HvLpEvent * event);
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extern int viopath_open(HvLpIndex remoteLp, int subtype, int numReq);
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extern int viopath_close(HvLpIndex remoteLp, int subtype, int numReq);
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extern int vio_setHandler(int subtype, vio_event_handler_t * beh);
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extern int vio_clearHandler(int subtype);
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extern int viopath_isactive(HvLpIndex lp);
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extern HvLpInstanceId viopath_sourceinst(HvLpIndex lp);
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extern HvLpInstanceId viopath_targetinst(HvLpIndex lp);
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extern void vio_set_hostlp(void);
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extern void *vio_get_event_buffer(int subtype);
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extern void vio_free_event_buffer(int subtype, void *buffer);
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extern HvLpIndex viopath_hostLp;
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extern HvLpIndex viopath_ourLp;
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#define VIOCHAR_MAX_DATA 200
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#define VIOMAJOR_SUBTYPE_MASK 0xff00
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#define VIOMINOR_SUBTYPE_MASK 0x00ff
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#define VIOMAJOR_SUBTYPE_SHIFT 8
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#define VIOVERSION 0x0101
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/*
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* This is the general structure for VIO errors; each module should have
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* a table of them, and each table should be terminated by an entry of
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* { 0, 0, NULL }. Then, to find a specific error message, a module
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* should pass its local table and the return code.
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*/
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struct vio_error_entry {
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u16 rc;
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int errno;
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const char *msg;
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};
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extern const struct vio_error_entry *vio_lookup_rc(
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const struct vio_error_entry *local_table, u16 rc);
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enum viosubtypes {
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viomajorsubtype_monitor = 0x0100,
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viomajorsubtype_blockio = 0x0200,
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viomajorsubtype_chario = 0x0300,
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viomajorsubtype_config = 0x0400,
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viomajorsubtype_cdio = 0x0500,
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viomajorsubtype_tape = 0x0600,
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viomajorsubtype_scsi = 0x0700
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};
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enum vioconfigsubtype {
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vioconfigget = 0x0001,
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};
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enum viorc {
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viorc_good = 0x0000,
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viorc_noConnection = 0x0001,
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viorc_noReceiver = 0x0002,
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viorc_noBufferAvailable = 0x0003,
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viorc_invalidMessageType = 0x0004,
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viorc_invalidRange = 0x0201,
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viorc_invalidToken = 0x0202,
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viorc_DMAError = 0x0203,
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viorc_useError = 0x0204,
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viorc_releaseError = 0x0205,
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viorc_invalidDisk = 0x0206,
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viorc_openRejected = 0x0301
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};
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struct device;
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extern struct device *iSeries_vio_dev;
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#endif /* _ASM_POWERPC_ISERIES_VIO_H */
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