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 RXE_ROCE_V2_SPORT               (0xc000)
  69
  70 static inline u32 rxe_crc32(struct rxe_dev *rxe,
  71                             u32 crc, void *next, size_t len)
  72 {
  73         u32 retval;
  74         int err;
  75
  76         SHASH_DESC_ON_STACK(shash, rxe->tfm);
  77
  78         shash->tfm = rxe->tfm;
  79         *(u32 *)shash_desc_ctx(shash) = crc;
  80         err = crypto_shash_update(shash, next, len);
  81         if (unlikely(err)) {
  82                 pr_warn_ratelimited("failed crc calculation, err: %d\n", err);
  83                 return crc32_le(crc, next, len);
  84         }
  85
  86         retval = *(u32 *)shash_desc_ctx(shash);
  87         barrier_data(shash_desc_ctx(shash));
  88         return retval;
  89 }
  90
  91 void rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu);
  92
  93 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name);
  94
  95 void rxe_rcv(struct sk_buff *skb);
  96
  97 /* The caller must do a matching ib_device_put(&dev->ib_dev) */
  98 static inline struct rxe_dev *rxe_get_dev_from_net(struct net_device *ndev)
  99 {
 100         struct ib_device *ibdev =
 101                 ib_device_get_by_netdev(ndev, RDMA_DRIVER_RXE);
 102
 103         if (!ibdev)
 104                 return NULL;
 105         return container_of(ibdev, struct rxe_dev, ib_dev);
 106 }
 107
 108 void rxe_port_up(struct rxe_dev *rxe);
 109 void rxe_port_down(struct rxe_dev *rxe);
 110 void rxe_set_port_state(struct rxe_dev *rxe);
 111
 112 #endif /* RXE_H */