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877b5691f2
The flags field in 'struct shash_desc' never actually does anything. The only ostensibly supported flag is CRYPTO_TFM_REQ_MAY_SLEEP. However, no shash algorithm ever sleeps, making this flag a no-op. With this being the case, inevitably some users who can't sleep wrongly pass MAY_SLEEP. These would all need to be fixed if any shash algorithm actually started sleeping. For example, the shash_ahash_*() functions, which wrap a shash algorithm with the ahash API, pass through MAY_SLEEP from the ahash API to the shash API. However, the shash functions are called under kmap_atomic(), so actually they're assumed to never sleep. Even if it turns out that some users do need preemption points while hashing large buffers, we could easily provide a helper function crypto_shash_update_large() which divides the data into smaller chunks and calls crypto_shash_update() and cond_resched() for each chunk. It's not necessary to have a flag in 'struct shash_desc', nor is it necessary to make individual shash algorithms aware of this at all. Therefore, remove shash_desc::flags, and document that the crypto_shash_*() functions can be called from any context. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef RXE_H
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#define RXE_H
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#ifdef pr_fmt
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#undef pr_fmt
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#endif
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/crc32.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/ib_pack.h>
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#include <rdma/ib_smi.h>
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#include <rdma/ib_umem.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_addr.h>
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#include <crypto/hash.h>
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#include "rxe_net.h"
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#include "rxe_opcode.h"
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#include "rxe_hdr.h"
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#include "rxe_param.h"
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#include "rxe_verbs.h"
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#include "rxe_loc.h"
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/*
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* Version 1 and Version 2 are identical on 64 bit machines, but on 32 bit
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* machines Version 2 has a different struct layout.
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*/
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#define RXE_UVERBS_ABI_VERSION 2
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#define RDMA_LINK_PHYS_STATE_LINK_UP (5)
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#define RDMA_LINK_PHYS_STATE_DISABLED (3)
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#define RDMA_LINK_PHYS_STATE_POLLING (2)
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#define RXE_ROCE_V2_SPORT (0xc000)
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static inline u32 rxe_crc32(struct rxe_dev *rxe,
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u32 crc, void *next, size_t len)
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{
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u32 retval;
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int err;
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SHASH_DESC_ON_STACK(shash, rxe->tfm);
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shash->tfm = rxe->tfm;
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*(u32 *)shash_desc_ctx(shash) = crc;
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err = crypto_shash_update(shash, next, len);
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if (unlikely(err)) {
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pr_warn_ratelimited("failed crc calculation, err: %d\n", err);
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return crc32_le(crc, next, len);
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}
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retval = *(u32 *)shash_desc_ctx(shash);
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barrier_data(shash_desc_ctx(shash));
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return retval;
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}
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void rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu);
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int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name);
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void rxe_rcv(struct sk_buff *skb);
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/* The caller must do a matching ib_device_put(&dev->ib_dev) */
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static inline struct rxe_dev *rxe_get_dev_from_net(struct net_device *ndev)
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{
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struct ib_device *ibdev =
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ib_device_get_by_netdev(ndev, RDMA_DRIVER_RXE);
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if (!ibdev)
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return NULL;
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return container_of(ibdev, struct rxe_dev, ib_dev);
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}
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void rxe_port_up(struct rxe_dev *rxe);
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void rxe_port_down(struct rxe_dev *rxe);
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void rxe_set_port_state(struct rxe_dev *rxe);
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#endif /* RXE_H */
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