common/sys/pattr.h

/*
 * 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 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_PATTR_H
#define _SYS_PATTR_H

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Attribute types and structures.
 */
#define PATTR_DSTADDRSAP    0x1 /* destination physical address+SAP */
#define PATTR_SRCADDRSAP    0x2 /* source physical address+SAP */
#define PATTR_HCKSUM        0x3 /* hardware checksum attribute */
#define PATTR_ZCOPY     0x4 /* zerocopy attribute */

/*
 * Structure shared by {source,destination} physical address+SAP attributes.
 */
typedef struct pattr_addr_s {
    uint8_t addr_is_group;  /* address is broadcast or multicast */
    uint8_t addr_len;   /* length of address */
    uint8_t addr[1];    /* address */
} pattr_addr_t;

/*
 * Structure used for Hardware Checksum attribute.
 */

typedef struct pattr_hcksum_s {
    uint32_t    hcksum_start_offset;
    uint32_t    hcksum_stuff_offset;
    uint32_t    hcksum_end_offset;
    union {
        uint64_t value;
        uint16_t inet_cksum; /* to store H/W computed cksum value */
    } hcksum_cksum_val;
    uint32_t    hcksum_flags;
} pattr_hcksum_t;

/*
 * Values for hcksum_flags
 */
#define HCK_IPV4_HDRCKSUM   0x01    /* On Transmit: Compute IP header */
                    /* checksum in hardware. */

#define HCK_IPV4_HDRCKSUM_OK    0x01    /* On Receive: IP header checksum */
                    /* was verified by h/w and is */
                    /* correct. */

#define HCK_PARTIALCKSUM    0x02    /* On Transmit: Compute partial 1's */
                    /* complement checksum based on */
                    /* start, stuff and end offsets. */
                    /* On Receive : Partial checksum */
                    /* computed and attached. */

#define HCK_FULLCKSUM       0x04    /* On Transmit: Compute full(in case */
                    /* of TCP/UDP, full is pseudo-header */
                    /* + header + payload) checksum for */
                    /* this packet. */
                    /* On Receive : Full checksum  */
                    /* computed in h/w and is attached */

#define HCK_FULLCKSUM_OK    0x08    /* On Transmit: N/A */
                    /* On Receive: Full checksum status */
                    /* If set, implies full checksum */
                    /* computation was successful */
                    /* i.e. checksum was correct. */
                    /* If it is not set, IP will also */
                    /* check the attached h/w computed */
                    /* checksum value to determine if */
                    /* checksum was bad */

#define HCK_FLAGS       (HCK_IPV4_HDRCKSUM | HCK_PARTIALCKSUM | \
                HCK_FULLCKSUM | HCK_FULLCKSUM_OK)
/*
 * Extended hardware offloading flags that also use hcksum_flags
 */
#define HW_LSO          0x10    /* On Transmit: hardware does LSO */
                    /* On Receive: N/A */

#define HW_LSO_FLAGS        HW_LSO  /* All LSO flags, currently only one */

/*
 * Structure used for zerocopy attribute.
 */
typedef struct pattr_zcopy_s {
    uint_t zcopy_flags;
} pattr_zcopy_t;

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS_PATTR_H */