This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-powerpc / iseries / vio.h

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