Linux-2.6.33.2/drivers/staging/octeon/cvmx-wqe.h
/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/**
*
* This header file defines the work queue entry (wqe) data structure.
* Since this is a commonly used structure that depends on structures
* from several hardware blocks, those definitions have been placed
* in this file to create a single point of definition of the wqe
* format.
* Data structures are still named according to the block that they
* relate to.
*
*/
#ifndef __CVMX_WQE_H__
#define __CVMX_WQE_H__
#include "cvmx-packet.h"
#define OCT_TAG_TYPE_STRING(x) \
(((x) == CVMX_POW_TAG_TYPE_ORDERED) ? "ORDERED" : \
(((x) == CVMX_POW_TAG_TYPE_ATOMIC) ? "ATOMIC" : \
(((x) == CVMX_POW_TAG_TYPE_NULL) ? "NULL" : \
"NULL_NULL")))
/**
* HW decode / err_code in work queue entry
*/
typedef union {
uint64_t u64;
/* Use this struct if the hardware determines that the packet is IP */
struct {
/* HW sets this to the number of buffers used by this packet */
uint64_t bufs:8;
/* HW sets to the number of L2 bytes prior to the IP */
uint64_t ip_offset:8;
/* set to 1 if we found DSA/VLAN in the L2 */
uint64_t vlan_valid:1;
/* Set to 1 if the DSA/VLAN tag is stacked */
uint64_t vlan_stacked:1;
uint64_t unassigned:1;
/* HW sets to the DSA/VLAN CFI flag (valid when vlan_valid) */
uint64_t vlan_cfi:1;
/* HW sets to the DSA/VLAN_ID field (valid when vlan_valid) */
uint64_t vlan_id:12;
/* Ring Identifier (if PCIe). Requires PIP_GBL_CTL[RING_EN]=1 */
uint64_t pr:4;
uint64_t unassigned2:8;
/* the packet needs to be decompressed */
uint64_t dec_ipcomp:1;
/* the packet is either TCP or UDP */
uint64_t tcp_or_udp:1;
/* the packet needs to be decrypted (ESP or AH) */
uint64_t dec_ipsec:1;
/* the packet is IPv6 */
uint64_t is_v6:1;
/*
* (rcv_error, not_IP, IP_exc, is_frag, L4_error,
* software, etc.).
*/
/*
* reserved for software use, hardware will clear on
* packet creation.
*/
uint64_t software:1;
/* exceptional conditions below */
/* the receive interface hardware detected an L4 error
* (only applies if !is_frag) (only applies if
* !rcv_error && !not_IP && !IP_exc && !is_frag)
* failure indicated in err_code below, decode:
*
* - 1 = Malformed L4
* - 2 = L4 Checksum Error: the L4 checksum value is
* - 3 = UDP Length Error: The UDP length field would
* make the UDP data longer than what remains in
* the IP packet (as defined by the IP header
* length field).
* - 4 = Bad L4 Port: either the source or destination
* TCP/UDP port is 0.
* - 8 = TCP FIN Only: the packet is TCP and only the
* FIN flag set.
* - 9 = TCP No Flags: the packet is TCP and no flags
* are set.
* - 10 = TCP FIN RST: the packet is TCP and both FIN
* and RST are set.
* - 11 = TCP SYN URG: the packet is TCP and both SYN
* and URG are set.
* - 12 = TCP SYN RST: the packet is TCP and both SYN
* and RST are set.
* - 13 = TCP SYN FIN: the packet is TCP and both SYN
* and FIN are set.
*/
uint64_t L4_error:1;
/* set if the packet is a fragment */
uint64_t is_frag:1;
/* the receive interface hardware detected an IP error
* / exception (only applies if !rcv_error && !not_IP)
* failure indicated in err_code below, decode:
*
* - 1 = Not IP: the IP version field is neither 4 nor
* 6.
* - 2 = IPv4 Header Checksum Error: the IPv4 header
* has a checksum violation.
* - 3 = IP Malformed Header: the packet is not long
* enough to contain the IP header.
* - 4 = IP Malformed: the packet is not long enough
* to contain the bytes indicated by the IP
* header. Pad is allowed.
* - 5 = IP TTL Hop: the IPv4 TTL field or the IPv6
* Hop Count field are zero.
* - 6 = IP Options
*/
uint64_t IP_exc:1;
/*
* Set if the hardware determined that the packet is a
* broadcast.
*/
uint64_t is_bcast:1;
/*
* St if the hardware determined that the packet is a
* multi-cast.
*/
uint64_t is_mcast:1;
/*
* Set if the packet may not be IP (must be zero in
* this case).
*/
uint64_t not_IP:1;
/*
* The receive interface hardware detected a receive
* error (must be zero in this case).
*/
uint64_t rcv_error:1;
/* lower err_code = first-level descriptor of the
* work */
/* zero for packet submitted by hardware that isn't on
* the slow path */
/* type is cvmx_pip_err_t */
uint64_t err_code:8;
} s;
/* use this to get at the 16 vlan bits */
struct {
uint64_t unused1:16;
uint64_t vlan:16;
uint64_t unused2:32;
} svlan;
/*
* use this struct if the hardware could not determine that
* the packet is ip.
*/
struct {
/*
* HW sets this to the number of buffers used by this
* packet.
*/
uint64_t bufs:8;
uint64_t unused:8;
/* set to 1 if we found DSA/VLAN in the L2 */
uint64_t vlan_valid:1;
/* Set to 1 if the DSA/VLAN tag is stacked */
uint64_t vlan_stacked:1;
uint64_t unassigned:1;
/*
* HW sets to the DSA/VLAN CFI flag (valid when
* vlan_valid)
*/
uint64_t vlan_cfi:1;
/*
* HW sets to the DSA/VLAN_ID field (valid when
* vlan_valid).
*/
uint64_t vlan_id:12;
/*
* Ring Identifier (if PCIe). Requires
* PIP_GBL_CTL[RING_EN]=1
*/
uint64_t pr:4;
uint64_t unassigned2:12;
/*
* reserved for software use, hardware will clear on
* packet creation.
*/
uint64_t software:1;
uint64_t unassigned3:1;
/*
* set if the hardware determined that the packet is
* rarp.
*/
uint64_t is_rarp:1;
/*
* set if the hardware determined that the packet is
* arp
*/
uint64_t is_arp:1;
/*
* set if the hardware determined that the packet is a
* broadcast.
*/
uint64_t is_bcast:1;
/*
* set if the hardware determined that the packet is a
* multi-cast
*/
uint64_t is_mcast:1;
/*
* set if the packet may not be IP (must be one in
* this case)
*/
uint64_t not_IP:1;
/* The receive interface hardware detected a receive
* error. Failure indicated in err_code below,
* decode:
*
* - 1 = partial error: a packet was partially
* received, but internal buffering / bandwidth
* was not adequate to receive the entire
* packet.
* - 2 = jabber error: the RGMII packet was too large
* and is truncated.
* - 3 = overrun error: the RGMII packet is longer
* than allowed and had an FCS error.
* - 4 = oversize error: the RGMII packet is longer
* than allowed.
* - 5 = alignment error: the RGMII packet is not an
* integer number of bytes
* and had an FCS error (100M and 10M only).
* - 6 = fragment error: the RGMII packet is shorter
* than allowed and had an FCS error.
* - 7 = GMX FCS error: the RGMII packet had an FCS
* error.
* - 8 = undersize error: the RGMII packet is shorter
* than allowed.
* - 9 = extend error: the RGMII packet had an extend
* error.
* - 10 = length mismatch error: the RGMII packet had
* a length that did not match the length field
* in the L2 HDR.
* - 11 = RGMII RX error/SPI4 DIP4 Error: the RGMII
* packet had one or more data reception errors
* (RXERR) or the SPI4 packet had one or more
* DIP4 errors.
* - 12 = RGMII skip error/SPI4 Abort Error: the RGMII
* packet was not large enough to cover the
* skipped bytes or the SPI4 packet was
* terminated with an About EOPS.
* - 13 = RGMII nibble error/SPI4 Port NXA Error: the
* RGMII packet had a studder error (data not
* repeated - 10/100M only) or the SPI4 packet
* was sent to an NXA.
* - 16 = FCS error: a SPI4.2 packet had an FCS error.
* - 17 = Skip error: a packet was not large enough to
* cover the skipped bytes.
* - 18 = L2 header malformed: the packet is not long
* enough to contain the L2.
*/
uint64_t rcv_error:1;
/*
* lower err_code = first-level descriptor of the
* work
*/
/*
* zero for packet submitted by hardware that isn't on
* the slow path
*/
/* type is cvmx_pip_err_t (union, so can't use directly */
uint64_t err_code:8;
} snoip;
} cvmx_pip_wqe_word2;
/**
* Work queue entry format
*
* must be 8-byte aligned
*/
typedef struct {
/*****************************************************************
* WORD 0
* HW WRITE: the following 64 bits are filled by HW when a packet arrives
*/
/**
* raw chksum result generated by the HW
*/
uint16_t hw_chksum;
/**
* Field unused by hardware - available for software
*/
uint8_t unused;
/**
* Next pointer used by hardware for list maintenance.
* May be written/read by HW before the work queue
* entry is scheduled to a PP
* (Only 36 bits used in Octeon 1)
*/
uint64_t next_ptr:40;
/*****************************************************************
* WORD 1
* HW WRITE: the following 64 bits are filled by HW when a packet arrives
*/
/**
* HW sets to the total number of bytes in the packet
*/
uint64_t len:16;
/**
* HW sets this to input physical port
*/
uint64_t ipprt:6;
/**
* HW sets this to what it thought the priority of the input packet was
*/
uint64_t qos:3;
/**
* the group that the work queue entry will be scheduled to
*/
uint64_t grp:4;
/**
* the type of the tag (ORDERED, ATOMIC, NULL)
*/
uint64_t tag_type:3;
/**
* the synchronization/ordering tag
*/
uint64_t tag:32;
/**
* WORD 2 HW WRITE: the following 64-bits are filled in by
* hardware when a packet arrives This indicates a variety of
* status and error conditions.
*/
cvmx_pip_wqe_word2 word2;
/**
* Pointer to the first segment of the packet.
*/
union cvmx_buf_ptr packet_ptr;
/**
* HW WRITE: octeon will fill in a programmable amount from the
* packet, up to (at most, but perhaps less) the amount
* needed to fill the work queue entry to 128 bytes
*
* If the packet is recognized to be IP, the hardware starts
* (except that the IPv4 header is padded for appropriate
* alignment) writing here where the IP header starts. If the
* packet is not recognized to be IP, the hardware starts
* writing the beginning of the packet here.
*/
uint8_t packet_data[96];
/**
* If desired, SW can make the work Q entry any length. For the
* purposes of discussion here, Assume 128B always, as this is all that
* the hardware deals with.
*
*/
} CVMX_CACHE_LINE_ALIGNED cvmx_wqe_t;
#endif /* __CVMX_WQE_H__ */