drivers/infiniband/hw/ipath/ips_common.h

   1 #ifndef IPS_COMMON_H
   2 #define IPS_COMMON_H
   3 /*
   4  * Copyright (c) 2006 QLogic, Inc. All rights reserved.
   5  * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include "ipath_common.h"
  37
  38 struct ipath_header {
  39         /*
  40          * Version - 4 bits, Port - 4 bits, TID - 10 bits and Offset -
  41          * 14 bits before ECO change ~28 Dec 03.  After that, Vers 4,
  42          * Port 3, TID 11, offset 14.
  43          */
  44         __le32 ver_port_tid_offset;
  45         __le16 chksum;
  46         __le16 pkt_flags;
  47 };
  48
  49 struct ips_message_header {
  50         __be16 lrh[4];
  51         __be32 bth[3];
  52         /* fields below this point are in host byte order */
  53         struct ipath_header iph;
  54         __u8 sub_opcode;
  55         __u8 flags;
  56         __u16 src_rank;
  57         /* 24 bits. The upper 8 bit is available for other use */
  58         union {
  59                 struct {
  60                         unsigned ack_seq_num:24;
  61                         unsigned port:4;
  62                         unsigned unused:4;
  63                 };
  64                 __u32 ack_seq_num_org;
  65         };
  66         __u8 expected_tid_session_id;
  67         __u8 tinylen;           /* to aid MPI */
  68         union {
  69             __u16 tag;          /* to aid MPI */
  70             __u16 mqhdr;        /* for PSM MQ */
  71         };
  72         union {
  73                 __u32 mpi[4];   /* to aid MPI */
  74                 __u32 data[4];
  75                 __u64 mq[2];    /* for PSM MQ */
  76                 struct {
  77                         __u16 mtu;
  78                         __u8 major_ver;
  79                         __u8 minor_ver;
  80                         __u32 not_used; //free
  81                         __u32 run_id;
  82                         __u32 client_ver;
  83                 };
  84         };
  85 };
  86
  87 struct ether_header {
  88         __be16 lrh[4];
  89         __be32 bth[3];
  90         struct ipath_header iph;
  91         __u8 sub_opcode;
  92         __u8 cmd;
  93         __be16 lid;
  94         __u16 mac[3];
  95         __u8 frag_num;
  96         __u8 seq_num;
  97         __le32 len;
  98         /* MUST be of word size due to PIO write requirements */
  99         __le32 csum;
 100         __le16 csum_offset;
 101         __le16 flags;
 102         __u16 first_2_bytes;
 103         __u8 unused[2];         /* currently unused */
 104 };
 105
 106 /*
 107  * The PIO buffer used for sending infinipath messages must only be written
 108  * in 32-bit words, all the data must be written, and no writes can occur
 109  * after the last word is written (which transfers "ownership" of the buffer
 110  * to the chip and triggers the message to be sent).
 111  * Since the Linux sk_buff structure can be recursive, non-aligned, and
 112  * any number of bytes in each segment, we use the following structure
 113  * to keep information about the overall state of the copy operation.
 114  * This is used to save the information needed to store the checksum
 115  * in the right place before sending the last word to the hardware and
 116  * to buffer the last 0-3 bytes of non-word sized segments.
 117  */
 118 struct copy_data_s {
 119         struct ether_header *hdr;
 120         /* addr of PIO buf to write csum to */
 121         __u32 __iomem *csum_pio;
 122         __u32 __iomem *to;      /* addr of PIO buf to write data to */
 123         __u32 device;           /* which device to allocate PIO bufs from */
 124         __s32 error;            /* set if there is an error. */
 125         __s32 extra;            /* amount of data saved in u.buf below */
 126         __u32 len;              /* total length to send in bytes */
 127         __u32 flen;             /* frament length in words */
 128         __u32 csum;             /* partial IP checksum */
 129         __u32 pos;              /* position for partial checksum */
 130         __u32 offset;           /* offset to where data currently starts */
 131         __s32 checksum_calc;    /* set to 1 when csum has been calculated */
 132         struct sk_buff *skb;
 133         union {
 134                 __u32 w;
 135                 __u8 buf[4];
 136         } u;
 137 };
 138
 139 /* IB - LRH header consts */
 140 #define IPS_LRH_GRH 0x0003      /* 1. word of IB LRH - next header: GRH */
 141 #define IPS_LRH_BTH 0x0002      /* 1. word of IB LRH - next header: BTH */
 142
 143 #define IPS_OFFSET  0
 144
 145 /*
 146  * defines the cut-off point between the header queue and eager/expected
 147  * TID queue
 148  */
 149 #define NUM_OF_EXTRA_WORDS_IN_HEADER_QUEUE \
 150         ((sizeof(struct ips_message_header) - \
 151           offsetof(struct ips_message_header, iph)) >> 2)
 152
 153 /* OpCodes  */
 154 #define OPCODE_IPS 0xC0
 155 #define OPCODE_ITH4X 0xC1
 156
 157 /* OpCode 30 is use by stand-alone test programs  */
 158 #define OPCODE_RAW_DATA 0xDE
 159 /* last OpCode (31) is reserved for test  */
 160 #define OPCODE_TEST 0xDF
 161
 162 /* sub OpCodes - ips  */
 163 #define OPCODE_SEQ_DATA 0x01
 164 #define OPCODE_SEQ_CTRL 0x02
 165
 166 #define OPCODE_SEQ_MQ_DATA 0x03
 167 #define OPCODE_SEQ_MQ_CTRL 0x04
 168
 169 #define OPCODE_ACK 0x10
 170 #define OPCODE_NAK 0x11
 171
 172 #define OPCODE_ERR_CHK 0x20
 173 #define OPCODE_ERR_CHK_PLS 0x21
 174
 175 #define OPCODE_STARTUP 0x30
 176 #define OPCODE_STARTUP_ACK 0x31
 177 #define OPCODE_STARTUP_NAK 0x32
 178
 179 #define OPCODE_STARTUP_EXT 0x34
 180 #define OPCODE_STARTUP_ACK_EXT 0x35
 181 #define OPCODE_STARTUP_NAK_EXT 0x36
 182
 183 #define OPCODE_TIDS_RELEASE 0x40
 184 #define OPCODE_TIDS_RELEASE_CONFIRM 0x41
 185
 186 #define OPCODE_CLOSE 0x50
 187 #define OPCODE_CLOSE_ACK 0x51
 188 /*
 189  * like OPCODE_CLOSE, but no complaint if other side has already closed.
 190  * Used when doing abort(), MPI_Abort(), etc.
 191  */
 192 #define OPCODE_ABORT 0x52
 193
 194 /* sub OpCodes - ith4x  */
 195 #define OPCODE_ENCAP 0x81
 196 #define OPCODE_LID_ARP 0x82
 197
 198 /* Receive Header Queue: receive type (from infinipath) */
 199 #define RCVHQ_RCV_TYPE_EXPECTED  0
 200 #define RCVHQ_RCV_TYPE_EAGER     1
 201 #define RCVHQ_RCV_TYPE_NON_KD    2
 202 #define RCVHQ_RCV_TYPE_ERROR     3
 203
 204 /* misc. */
 205 #define SIZE_OF_CRC 1
 206
 207 #define EAGER_TID_ID INFINIPATH_I_TID_MASK
 208
 209 #define IPS_DEFAULT_P_KEY 0xFFFF
 210
 211 #define IPS_PERMISSIVE_LID 0xFFFF
 212 #define IPS_MULTICAST_LID_BASE 0xC000
 213
 214 #define IPS_AETH_CREDIT_SHIFT 24
 215 #define IPS_AETH_CREDIT_MASK 0x1F
 216 #define IPS_AETH_CREDIT_INVAL 0x1F
 217
 218 #define IPS_PSN_MASK 0xFFFFFF
 219 #define IPS_MSN_MASK 0xFFFFFF
 220 #define IPS_QPN_MASK 0xFFFFFF
 221 #define IPS_MULTICAST_QPN 0xFFFFFF
 222
 223 /* functions for extracting fields from rcvhdrq entries */
 224 static inline __u32 ips_get_hdr_err_flags(const __le32 * rbuf)
 225 {
 226         return __le32_to_cpu(rbuf[1]);
 227 }
 228
 229 static inline __u32 ips_get_index(const __le32 * rbuf)
 230 {
 231         return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_EGRINDEX_SHIFT)
 232             & INFINIPATH_RHF_EGRINDEX_MASK;
 233 }
 234
 235 static inline __u32 ips_get_rcv_type(const __le32 * rbuf)
 236 {
 237         return (__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_RCVTYPE_SHIFT)
 238             & INFINIPATH_RHF_RCVTYPE_MASK;
 239 }
 240
 241 static inline __u32 ips_get_length_in_bytes(const __le32 * rbuf)
 242 {
 243         return ((__le32_to_cpu(rbuf[0]) >> INFINIPATH_RHF_LENGTH_SHIFT)
 244                 & INFINIPATH_RHF_LENGTH_MASK) << 2;
 245 }
 246
 247 static inline void *ips_get_first_protocol_header(const __u32 * rbuf)
 248 {
 249         return (void *)&rbuf[2];
 250 }
 251
 252 static inline struct ips_message_header *ips_get_ips_header(const __u32 *
 253                                                             rbuf)
 254 {
 255         return (struct ips_message_header *)&rbuf[2];
 256 }
 257
 258 static inline __u32 ips_get_ipath_ver(__le32 hdrword)
 259 {
 260         return (__le32_to_cpu(hdrword) >> INFINIPATH_I_VERS_SHIFT)
 261             & INFINIPATH_I_VERS_MASK;
 262 }
 263
 264 #endif                          /* IPS_COMMON_H */