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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _VLDC_IMPL_H
#define _VLDC_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/stream.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/ldc.h>
#include <sys/vldc.h>
/* default values */
#define VLDC_DEFAULT_MTU 0x1000 /* default mtu size 4K */
/* VLDC limits */
#define VLDC_MAX_COOKIE 0x40000 /* max. size of xfer to/from HV */
#define VLDC_MAX_MTU 0x40000 /* 256K */
#define VLDC_MAX_PORTS 0x800
#define VLDC_MAX_MINORS VLDC_MAX_PORTS
#define VLDC_MINOR_MASK (VLDC_MAX_PORTS - 1)
#define VLDC_INST_SHIFT 11
#define VLDC_HVCTL_SVCNAME "hvctl"
/* get port number from minor number */
#define VLDCPORT(vldcp, minor) \
((vldcp)->minor_tbl[(minor) & VLDC_MINOR_MASK].portno)
/* get minor table entry from minor number */
#define VLDCMINOR(vldcp, minor) \
(&((vldcp)->minor_tbl[(minor) & VLDC_MINOR_MASK]))
/* get instance number from minor number */
#define VLDCINST(minor) ((minor) >> VLDC_INST_SHIFT)
/* indicates an invalid port number */
#define VLDC_INVALID_PORTNO ((uint_t)-1)
/* delay(in us) used to wait for pending callback to complete */
#define VLDC_CLOSE_DELAY MICROSEC /* 1sec */
/*
* Minor node number to port number mapping table.
*
* The lock field in the vldc_minor structure is used to serialize operations
* on the port associated with the minor node. It also protects the minor node
* in_use field which is used to track the number of active users of the minor
* node. Driver ops will either hold the lock over the whole operation or
* will increment (and then decrement) the in use count if they need to
* release and re-acquire the lock, e.g. when copying data in from or out to
* userland. When the MDEG framework calls into the driver via the callback to
* remove a port, the driver must wait until the in use count for the minor
* node associated with the port drops to zero, before it can remove the
* port.
*/
typedef struct vldc_minor {
kmutex_t lock; /* protects port/in_use count */
kcondvar_t cv; /* for waiting on in use */
uint_t in_use; /* in use counter */
uint_t portno; /* port number */
char sname[MAXPATHLEN]; /* service name */
} vldc_minor_t;
typedef struct vldc_port {
uint_t number; /* port number */
uint32_t status; /* port status */
uint_t inst; /* vldc instance */
vldc_minor_t *minorp; /* minor table entry pointer */
uint32_t mtu; /* port mtu */
caddr_t send_buf; /* send buffer */
caddr_t recv_buf; /* receive buffer */
caddr_t cookie_buf; /* rd/wr cookie buffer */
uint64_t ldc_id; /* Channel number */
ldc_handle_t ldc_handle; /* Channel handle */
ldc_mode_t ldc_mode; /* Channel mode */
ldc_status_t ldc_status; /* Channel status */
boolean_t is_stream; /* streaming mode */
boolean_t hanged_up; /* port hanged up */
struct pollhead poll; /* for poll */
} vldc_port_t;
/*
* vldc driver's soft state structure
*/
typedef struct vldc {
kmutex_t lock; /* serializes detach and MDEG */
boolean_t detaching; /* true iff busy detaching */
dev_info_t *dip; /* dev_info */
mdeg_node_spec_t *inst_spec; /* vldc instance specifier */
mdeg_handle_t mdeg_hdl; /* MD event handle */
uint_t num_ports;
vldc_port_t port[VLDC_MAX_PORTS];
/* table for assigned minors */
vldc_minor_t minor_tbl[VLDC_MAX_MINORS];
/* number of minors already assigned */
uint_t minors_assigned;
} vldc_t;
#ifdef __cplusplus
}
#endif
#endif /* _VLDC_IMPL_H */
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