diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ips_common.h')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ips_common.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ips_common.h b/drivers/infiniband/hw/ipath/ips_common.h new file mode 100644 index 000000000000..410a764dfcef --- /dev/null +++ b/drivers/infiniband/hw/ipath/ips_common.h @@ -0,0 +1,263 @@ +#ifndef IPS_COMMON_H +#define IPS_COMMON_H +/* + * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "ipath_common.h" + +struct ipath_header { + /* + * Version - 4 bits, Port - 4 bits, TID - 10 bits and Offset - + * 14 bits before ECO change ~28 Dec 03. After that, Vers 4, + * Port 3, TID 11, offset 14. + */ + __le32 ver_port_tid_offset; + __le16 chksum; + __le16 pkt_flags; +}; + +struct ips_message_header { + __be16 lrh[4]; + __be32 bth[3]; + /* fields below this point are in host byte order */ + struct ipath_header iph; + __u8 sub_opcode; + __u8 flags; + __u16 src_rank; + /* 24 bits. The upper 8 bit is available for other use */ + union { + struct { + unsigned ack_seq_num:24; + unsigned port:4; + unsigned unused:4; + }; + __u32 ack_seq_num_org; + }; + __u8 expected_tid_session_id; + __u8 tinylen; /* to aid MPI */ + union { + __u16 tag; /* to aid MPI */ + __u16 mqhdr; /* for PSM MQ */ + }; + union { + __u32 mpi[4]; /* to aid MPI */ + __u32 data[4]; + __u64 mq[2]; /* for PSM MQ */ + struct { + __u16 mtu; + __u8 major_ver; + __u8 minor_ver; + __u32 not_used; //free + __u32 run_id; + __u32 client_ver; + }; + }; +}; + +struct ether_header { + __be16 lrh[4]; + __be32 bth[3]; + struct ipath_header iph; + __u8 sub_opcode; + __u8 cmd; + __be16 lid; + __u16 mac[3]; + __u8 frag_num; + __u8 seq_num; + __le32 len; + /* MUST be of word size due to PIO write requirements */ + __u32 csum; + __le16 csum_offset; + __le16 flags; + __u16 first_2_bytes; + __u8 unused[2]; /* currently unused */ +}; + +/* + * The PIO buffer used for sending infinipath messages must only be written + * in 32-bit words, all the data must be written, and no writes can occur + * after the last word is written (which transfers "ownership" of the buffer + * to the chip and triggers the message to be sent). + * Since the Linux sk_buff structure can be recursive, non-aligned, and + * any number of bytes in each segment, we use the following structure + * to keep information about the overall state of the copy operation. + * This is used to save the information needed to store the checksum + * in the right place before sending the last word to the hardware and + * to buffer the last 0-3 bytes of non-word sized segments. + */ +struct copy_data_s { + struct ether_header *hdr; + /* addr of PIO buf to write csum to */ + __u32 __iomem *csum_pio; + __u32 __iomem *to; /* addr of PIO buf to write data to */ + __u32 device; /* which device to allocate PIO bufs from */ + __s32 error; /* set if there is an error. */ + __s32 extra; /* amount of data saved in u.buf below */ + __u32 len; /* total length to send in bytes */ + __u32 flen; /* frament length in words */ + __u32 csum; /* partial IP checksum */ + __u32 pos; /* position for partial checksum */ + __u32 offset; /* offset to where data currently starts */ + __s32 checksum_calc; /* set to 1 when csum has been calculated */ + struct sk_buff *skb; + union { + __u32 w; + __u8 buf[4]; + } u; +}; + +/* IB - LRH header consts */ +#define IPS_LRH_GRH 0x0003 /* 1. word of IB LRH - next header: GRH */ +#define IPS_LRH_BTH 0x0002 /* 1. word of IB LRH - next header: BTH */ + +#define IPS_OFFSET 0 + +/* + * defines the cut-off point between the header queue and eager/expected + * TID queue + */ +#define NUM_OF_EXTRA_WORDS_IN_HEADER_QUEUE \ + ((sizeof(struct ips_message_header) - \ + offsetof(struct ips_message_header, iph)) >> 2) + +/* OpCodes */ +#define OPCODE_IPS 0xC0 +#define OPCODE_ITH4X 0xC1 + +/* OpCode 30 is use by stand-alone test programs */ +#define OPCODE_RAW_DATA 0xDE +/* last OpCode (31) is reserved for test */ +#define OPCODE_TEST 0xDF + +/* sub OpCodes - ips */ +#define OPCODE_SEQ_DATA 0x01 +#define OPCODE_SEQ_CTRL 0x02 + +#define OPCODE_SEQ_MQ_DATA 0x03 +#define OPCODE_SEQ_MQ_CTRL 0x04 + +#define OPCODE_ACK 0x10 +#define OPCODE_NAK 0x11 + +#define OPCODE_ERR_CHK 0x20 +#define OPCODE_ERR_CHK_PLS 0x21 + +#define OPCODE_STARTUP 0x30 +#define OPCODE_STARTUP_ACK 0x31 +#define OPCODE_STARTUP_NAK 0x32 + +#define OPCODE_STARTUP_EXT 0x34 +#define OPCODE_STARTUP_ACK_EXT 0x35 +#define OPCODE_STARTUP_NAK_EXT 0x36 + +#define OPCODE_TIDS_RELEASE 0x40 +#define OPCODE_TIDS_RELEASE_CONFIRM 0x41 + +#define OPCODE_CLOSE 0x50 +#define OPCODE_CLOSE_ACK 0x51 +/* + * like OPCODE_CLOSE, but no complaint if other side has already closed. + * Used when doing abort(), MPI_Abort(), etc. + */ +#define OPCODE_ABORT 0x52 + +/* sub OpCodes - ith4x */ +#define OPCODE_ENCAP 0x81 +#define OPCODE_LID_ARP 0x82 + +/* Receive Header Queue: receive type (from infinipath) */ +#define RCVHQ_RCV_TYPE_EXPECTED 0 +#define RCVHQ_RCV_TYPE_EAGER 1 +#define RCVHQ_RCV_TYPE_NON_KD 2 +#define RCVHQ_RCV_TYPE_ERROR 3 + +/* misc. */ +#define SIZE_OF_CRC 1 + +#define EAGER_TID_ID INFINIPATH_I_TID_MASK + +#define IPS_DEFAULT_P_KEY 0xFFFF + +#define IPS_PERMISSIVE_LID 0xFFFF +#define IPS_MULTICAST_LID_BASE 0xC000 + +#define IPS_AETH_CREDIT_SHIFT 24 +#define IPS_AETH_CREDIT_MASK 0x1F +#define IPS_AETH_CREDIT_INVAL 0x1F + +#define IPS_PSN_MASK 0xFFFFFF +#define IPS_MSN_MASK 0xFFFFFF +#define IPS_QPN_MASK 0xFFFFFF +#define IPS_MULTICAST_QPN 0xFFFFFF + +/* functions for extracting fields from rcvhdrq entries */ +static inline __u32 ips_get_hdr_err_flags(const __le32 * rbuf) +{ + return __le32_to_cpu(rbuf[1]); +} + +static inline __u32 ips_get_index(const __le32 * rbuf) +{ + return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_EGRINDEX_SHIFT) + & INFINIPATH_RHF_EGRINDEX_MASK; +} + +static inline __u32 ips_get_rcv_type(const __le32 * rbuf) +{ + return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_RCVTYPE_SHIFT) + & INFINIPATH_RHF_RCVTYPE_MASK; +} + +static inline __u32 ips_get_length_in_bytes(const __le32 * rbuf) +{ + return ((__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_LENGTH_SHIFT) + & INFINIPATH_RHF_LENGTH_MASK) << 2; +} + +static inline void *ips_get_first_protocol_header(const __u32 * rbuf) +{ + return (void *)&rbuf[2]; +} + +static inline struct ips_message_header *ips_get_ips_header(const __u32 * + rbuf) +{ + return (struct ips_message_header *)&rbuf[2]; +} + +static inline __u32 ips_get_ipath_ver(__le32 hdrword) +{ + return (__le32_to_cpu(hdrword) >> INFINIPATH_I_VERS_SHIFT) + & INFINIPATH_I_VERS_MASK; +} + +#endif /* IPS_COMMON_H */ |