drivers/infiniband/sw/rxe/rxe.h

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #ifndef RXE_H
  35 #define RXE_H
  36
  37 #ifdef pr_fmt
  38 #undef pr_fmt
  39 #endif
  40 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  41
  42 #include <linux/module.h>
  43 #include <linux/skbuff.h>
  44 #include <linux/crc32.h>
  45
  46 #include <rdma/ib_verbs.h>
  47 #include <rdma/ib_user_verbs.h>
  48 #include <rdma/ib_pack.h>
  49 #include <rdma/ib_smi.h>
  50 #include <rdma/ib_umem.h>
  51 #include <rdma/ib_cache.h>
  52 #include <rdma/ib_addr.h>
  53 #include <crypto/hash.h>
  54
  55 #include "rxe_net.h"
  56 #include "rxe_opcode.h"
  57 #include "rxe_hdr.h"
  58 #include "rxe_param.h"
  59 #include "rxe_verbs.h"
  60 #include "rxe_loc.h"
  61
  62 /*
  63  * Version 1 and Version 2 are identical on 64 bit machines, but on 32 bit
  64  * machines Version 2 has a different struct layout.
  65  */
  66 #define RXE_UVERBS_ABI_VERSION          2
  67
  68 #define IB_PHYS_STATE_LINK_UP           (5)
  69 #define IB_PHYS_STATE_LINK_DOWN         (3)
  70
  71 #define RXE_ROCE_V2_SPORT               (0xc000)
  72
  73 static inline u32 rxe_crc32(struct rxe_dev *rxe,
  74                             u32 crc, void *next, size_t len)
  75 {
  76         u32 retval;
  77         int err;
  78
  79         SHASH_DESC_ON_STACK(shash, rxe->tfm);
  80
  81         shash->tfm = rxe->tfm;
  82         shash->flags = 0;
  83         *(u32 *)shash_desc_ctx(shash) = crc;
  84         err = crypto_shash_update(shash, next, len);
  85         if (unlikely(err)) {
  86                 pr_warn_ratelimited("failed crc calculation, err: %d\n", err);
  87                 return crc32_le(crc, next, len);
  88         }
  89
  90         retval = *(u32 *)shash_desc_ctx(shash);
  91         barrier_data(shash_desc_ctx(shash));
  92         return retval;
  93 }
  94
  95 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu);
  96
  97 int rxe_add(struct rxe_dev *rxe, unsigned int mtu);
  98 void rxe_remove(struct rxe_dev *rxe);
  99 void rxe_remove_all(void);
 100
 101 void rxe_rcv(struct sk_buff *skb);
 102
 103 static inline void rxe_dev_put(struct rxe_dev *rxe)
 104 {
 105         kref_put(&rxe->ref_cnt, rxe_release);
 106 }
 107 struct rxe_dev *net_to_rxe(struct net_device *ndev);
 108 struct rxe_dev *get_rxe_by_name(const char *name);
 109
 110 void rxe_port_up(struct rxe_dev *rxe);
 111 void rxe_port_down(struct rxe_dev *rxe);
 112
 113 #endif /* RXE_H */