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      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 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef _VNET_COMMON_H
     28 #define	_VNET_COMMON_H
     29 
     30 #ifdef __cplusplus
     31 extern "C" {
     32 #endif
     33 
     34 #include <sys/vio_common.h>
     35 #include <sys/vio_mailbox.h>
     36 #include <sys/ethernet.h>
     37 
     38 /*
     39  * This header file contains definitions common to LDoms Virtual Network
     40  * server (vsw) and client (vnet).
     41  */
     42 
     43 /* max # of cookies per frame size */
     44 #define	MAX_COOKIES	 ((ETHERMAX >> MMU_PAGESHIFT) + 2ULL)
     45 
     46 /* initial send sequence number */
     47 #define	VNET_ISS		0x1
     48 
     49 #define	VNET_2K			(1 << 11)
     50 #define	VNET_4K			(1 << 12)
     51 #define	VNET_8K			(1 << 13)
     52 #define	VNET_12K		((VNET_8K) + (VNET_4K))
     53 #define	VNET_IPALIGN		6	/* padding for IP header alignment */
     54 #define	VNET_LDCALIGN		8	/* padding for ldc_mem_copy() align */
     55 #define	VNET_ROUNDUP_2K(n)	(((n) + (VNET_2K - 1)) & ~(VNET_2K - 1))
     56 #define	VNET_ROUNDUP_4K(n)	(((n) + (VNET_4K - 1)) & ~(VNET_4K - 1))
     57 #define	VNET_ROUNDUP_8K(n)	(((n) + (VNET_8K - 1)) & ~(VNET_8K - 1))
     58 
     59 /*
     60  * Maximum MTU value currently supported. MAX_COOKIES for data has been defined
     61  * already based on ETHERMAX. Hence we limit the MTU to be within 2 8K pages
     62  * and take some additional steps (see related code in .c files) to ensure that
     63  * ldc cookies for each data buffer is within the MAX_COOKIES. This allows us
     64  * to support Jumbo MTUs without changing the size of the descriptor.
     65  */
     66 #define	VNET_MAX_MTU		16000
     67 
     68 #define	VNET_NUM_HANDSHAKES	6	/* # of handshake attempts */
     69 
     70 /* vnet descriptor */
     71 typedef struct vnet_public_desc {
     72 	vio_dring_entry_hdr_t	hdr;		/* descriptor header */
     73 	uint32_t		nbytes;		/* data length */
     74 	uint32_t		ncookies;	/* number of data cookies */
     75 	ldc_mem_cookie_t	memcookie[MAX_COOKIES]; /* data cookies */
     76 } vnet_public_desc_t;
     77 
     78 /*
     79  * Vnet in-band descriptor. Used by those vnet clients
     80  * such as OBP who do not use descriptor rings.
     81  */
     82 typedef struct vnet_ibnd_desc {
     83 	vio_inband_desc_msg_hdr_t	hdr;
     84 
     85 	/* payload */
     86 	uint32_t			nbytes;
     87 	uint32_t			ncookies;
     88 	ldc_mem_cookie_t		memcookie[MAX_COOKIES];
     89 } vnet_ibnd_desc_t;
     90 
     91 /* exported functions */
     92 uint64_t vnet_macaddr_strtoul(const uint8_t *macaddr);
     93 void vnet_macaddr_ultostr(uint64_t value, uint8_t *macaddr);
     94 mblk_t *vnet_vlan_insert_tag(mblk_t *mp, uint16_t vid);
     95 mblk_t *vnet_vlan_remove_tag(mblk_t *mp);
     96 int vnet_dring_entry_copy(vnet_public_desc_t *dst, vnet_public_desc_t *src,
     97     uint8_t mtype, ldc_dring_handle_t handle, uint64_t start, uint64_t stop);
     98 int vnet_dring_entry_set_dstate(vnet_public_desc_t *descp, uint8_t mtype,
     99     ldc_dring_handle_t handle, uint64_t start, uint64_t stop, uint8_t dstate);
    100 
    101 #ifdef __cplusplus
    102 }
    103 #endif
    104 
    105 #endif	/* _VNET_COMMON_H */
    106