1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _VLDC_IMPL_H 28 #define _VLDC_IMPL_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/stream.h> 37 #include <sys/ddi.h> 38 #include <sys/sunddi.h> 39 #include <sys/ldc.h> 40 #include <sys/vldc.h> 41 42 /* default values */ 43 #define VLDC_DEFAULT_MTU 0x800 /* default mtu size */ 44 45 /* VLDC limits */ 46 #define VLDC_MAX_COOKIE 0x40000 /* max. size of xfer to/from HV */ 47 #define VLDC_MAX_MTU 0x40000 /* 256K */ 48 #define VLDC_MAX_PORTS 0x800 49 #define VLDC_MAX_MINORS VLDC_MAX_PORTS 50 #define VLDC_QUEUE_LEN 0x80 51 52 #define VLDC_MINOR_MASK (VLDC_MAX_PORTS - 1) 53 #define VLDC_INST_SHIFT 11 54 55 /* get port number from minor number */ 56 #define VLDCPORT(vldcp, minor) \ 57 ((vldcp)->minor_tbl[(minor) & VLDC_MINOR_MASK].portno) 58 59 /* get minor table entry from minor number */ 60 #define VLDCMINOR(vldcp, minor) \ 61 (&((vldcp)->minor_tbl[(minor) & VLDC_MINOR_MASK])) 62 63 /* get instance number from minor number */ 64 #define VLDCINST(minor) ((minor) >> VLDC_INST_SHIFT) 65 66 /* indicates an invalid port number */ 67 #define VLDC_INVALID_PORTNO ((uint_t)-1) 68 69 /* 70 * Minor node number to port number mapping table. 71 * 72 * The lock field in the vldc_minor structure is used to serialize operations 73 * on the port associated with the minor node. It also protects the minor node 74 * in_use field which is used to track the number of active users of the minor 75 * node. Driver ops will either hold the lock over the whole operation or 76 * will increment (and then decrement) the in use count if they need to 77 * release and re-acquire the lock, e.g. when copying data in from or out to 78 * userland. When the MDEG framework calls into the driver via the callback to 79 * remove a port, the driver must wait until the in use count for the minor 80 * node associated with the port drops to zero, before it can remove the 81 * port. 82 */ 83 typedef struct vldc_minor { 84 kmutex_t lock; /* protects port/in_use count */ 85 kcondvar_t cv; /* for waiting on in use */ 86 uint_t in_use; /* in use counter */ 87 uint_t portno; /* port number */ 88 char sname[MAXPATHLEN]; /* service name */ 89 } vldc_minor_t; 90 91 typedef struct vldc_port { 92 uint_t number; /* port number */ 93 uint32_t status; /* port status */ 94 vldc_minor_t *minorp; /* minor table entry pointer */ 95 uint32_t mtu; /* port mtu */ 96 caddr_t send_buf; /* send buffer */ 97 caddr_t recv_buf; /* receive buffer */ 98 99 uint64_t ldc_id; /* Channel number */ 100 ldc_handle_t ldc_handle; /* Channel handle */ 101 ldc_mode_t ldc_mode; /* Channel mode */ 102 103 boolean_t is_stream; /* streaming mode */ 104 boolean_t hanged_up; /* port hanged up */ 105 106 struct pollhead poll; /* for poll */ 107 } vldc_port_t; 108 109 /* 110 * vldc driver's soft state structure 111 */ 112 typedef struct vldc { 113 kmutex_t lock; /* serializes detach and MDEG */ 114 boolean_t detaching; /* true iff busy detaching */ 115 dev_info_t *dip; /* dev_info */ 116 mdeg_node_spec_t *inst_spec; /* vldc instance specifier */ 117 mdeg_handle_t mdeg_hdl; /* MD event handle */ 118 119 uint_t num_ports; 120 vldc_port_t port[VLDC_MAX_PORTS]; 121 122 /* table for assigned minors */ 123 vldc_minor_t minor_tbl[VLDC_MAX_MINORS]; 124 125 /* number of minors already assigned */ 126 uint_t minors_assigned; 127 } vldc_t; 128 129 #ifdef __cplusplus 130 } 131 #endif 132 133 #endif /* _VLDC_IMPL_H */ 134