usr/src/uts/common/sys/pattr.h

   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  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_PATTR_H
  27 #define _SYS_PATTR_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /*
  34  * Attribute types and structures.
  35  */
  36 #define PATTR_DSTADDRSAP        0x1     /* destination physical address+SAP */
  37 #define PATTR_SRCADDRSAP        0x2     /* source physical address+SAP */
  38 #define PATTR_HCKSUM            0x3     /* hardware checksum attribute */
  39 #define PATTR_ZCOPY             0x4     /* zerocopy attribute */
  40
  41 /*
  42  * Structure shared by {source,destination} physical address+SAP attributes.
  43  */
  44 typedef struct pattr_addr_s {
  45         uint8_t addr_is_group;  /* address is broadcast or multicast */
  46         uint8_t addr_len;       /* length of address */
  47         uint8_t addr[1];        /* address */
  48 } pattr_addr_t;
  49
  50 /*
  51  * Structure used for Hardware Checksum attribute.
  52  */
  53
  54 typedef struct pattr_hcksum_s {
  55         uint32_t        hcksum_start_offset;
  56         uint32_t        hcksum_stuff_offset;
  57         uint32_t        hcksum_end_offset;
  58         union {
  59                 uint64_t value;
  60                 uint16_t inet_cksum; /* to store H/W computed cksum value */
  61         } hcksum_cksum_val;
  62         uint32_t        hcksum_flags;
  63 } pattr_hcksum_t;
  64
  65 /*
  66  * Values for hcksum_flags
  67  */
  68 #define HCK_IPV4_HDRCKSUM       0x01    /* On Transmit: Compute IP header */
  69                                         /* checksum in hardware. */
  70
  71 #define HCK_IPV4_HDRCKSUM_OK    0x01    /* On Receive: IP header checksum */
  72                                         /* was verified by h/w and is */
  73                                         /* correct. */
  74
  75 #define HCK_PARTIALCKSUM        0x02    /* On Transmit: Compute partial 1's */
  76                                         /* complement checksum based on */
  77                                         /* start, stuff and end offsets. */
  78                                         /* On Receive : Partial checksum */
  79                                         /* computed and attached. */
  80
  81 #define HCK_FULLCKSUM           0x04    /* On Transmit: Compute full(in case */
  82                                         /* of TCP/UDP, full is pseudo-header */
  83                                         /* + header + payload) checksum for */
  84                                         /* this packet. */
  85                                         /* On Receive : Full checksum  */
  86                                         /* computed in h/w and is attached */
  87
  88 #define HCK_FULLCKSUM_OK        0x08    /* On Transmit: N/A */
  89                                         /* On Receive: Full checksum status */
  90                                         /* If set, implies full checksum */
  91                                         /* computation was successful */
  92                                         /* i.e. checksum was correct. */
  93                                         /* If it is not set, IP will also */
  94                                         /* check the attached h/w computed */
  95                                         /* checksum value to determine if */
  96                                         /* checksum was bad */
  97
  98 #define HCK_FLAGS               (HCK_IPV4_HDRCKSUM | HCK_PARTIALCKSUM | \
  99                                 HCK_FULLCKSUM | HCK_FULLCKSUM_OK)
 100 /*
 101  * Extended hardware offloading flags that also use hcksum_flags
 102  */
 103 #define HW_LSO                  0x10    /* On Transmit: hardware does LSO */
 104                                         /* On Receive: N/A */
 105
 106 #define HW_LSO_FLAGS            HW_LSO  /* All LSO flags, currently only one */
 107
 108 /*
 109  * Structure used for zerocopy attribute.
 110  */
 111 typedef struct pattr_zcopy_s {
 112         uint_t zcopy_flags;
 113 } pattr_zcopy_t;
 114
 115 #ifdef  __cplusplus
 116 }
 117 #endif
 118
 119 #endif  /* _SYS_PATTR_H */