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[2603:8081:140c:1a00:aaa9:75eb:6e0f:9f85]) by smtp.gmail.com with ESMTPSA id x29sm2697512ooj.10.2021.06.29.13.14.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jun 2021 13:14:24 -0700 (PDT) From: Bob Pearson To: jgg@nvidia.com, zyjzyj2000@gmail.com, linux-rdma@vger.kernel.org Cc: Bob Pearson Subject: [PATCH 4/5] RDMA/rxe: Move rxe_crc32 to a subroutine Date: Tue, 29 Jun 2021 15:14:09 -0500 Message-Id: <20210629201412.28306-5-rpearsonhpe@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210629201412.28306-1-rpearsonhpe@gmail.com> References: <20210629201412.28306-1-rpearsonhpe@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Move rxe_crc32 from rxe.h to rxe_icrc.c as a static local function. Add some comments to rxe_icrc.c Signed-off-by: Bob Pearson --- drivers/infiniband/sw/rxe/rxe.h | 21 ------------ drivers/infiniband/sw/rxe/rxe_icrc.c | 50 +++++++++++++++++++++++++--- drivers/infiniband/sw/rxe/rxe_loc.h | 1 - 3 files changed, 45 insertions(+), 27 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe.h b/drivers/infiniband/sw/rxe/rxe.h index 623fd17df02d..65a73c1c8b35 100644 --- a/drivers/infiniband/sw/rxe/rxe.h +++ b/drivers/infiniband/sw/rxe/rxe.h @@ -42,27 +42,6 @@ extern bool rxe_initialized; -static inline u32 rxe_crc32(struct rxe_dev *rxe, - u32 crc, void *next, size_t len) -{ - u32 retval; - int err; - - SHASH_DESC_ON_STACK(shash, rxe->tfm); - - shash->tfm = rxe->tfm; - *(u32 *)shash_desc_ctx(shash) = crc; - err = crypto_shash_update(shash, next, len); - if (unlikely(err)) { - pr_warn_ratelimited("failed crc calculation, err: %d\n", err); - return crc32_le(crc, next, len); - } - - retval = *(u32 *)shash_desc_ctx(shash); - barrier_data(shash_desc_ctx(shash)); - return retval; -} - void rxe_set_mtu(struct rxe_dev *rxe, unsigned int dev_mtu); int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name); diff --git a/drivers/infiniband/sw/rxe/rxe_icrc.c b/drivers/infiniband/sw/rxe/rxe_icrc.c index 5424b8bea908..e116c63d7b84 100644 --- a/drivers/infiniband/sw/rxe/rxe_icrc.c +++ b/drivers/infiniband/sw/rxe/rxe_icrc.c @@ -7,8 +7,44 @@ #include "rxe.h" #include "rxe_loc.h" -/* Compute a partial ICRC for all the IB transport headers. */ -u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb) +/** + * rxe_crc32 - Compute incremental crc32 for a contiguous segment + * @rxe: rdma_rxe device object + * @crc: starting crc32 value from previous segments + * @addr: starting address of segment + * @len: length of the segment in bytes + * + * Returns the crc32 checksum of the segment starting from crc. + */ +static u32 rxe_crc32(struct rxe_dev *rxe, u32 crc, void *addr, size_t len) +{ + u32 icrc; + int err; + + SHASH_DESC_ON_STACK(shash, rxe->tfm); + + shash->tfm = rxe->tfm; + *(u32 *)shash_desc_ctx(shash) = crc; + err = crypto_shash_update(shash, addr, len); + if (unlikely(err)) { + pr_warn_ratelimited("failed crc calculation, err: %d\n", err); + return crc32_le(crc, addr, len); + } + + icrc = *(u32 *)shash_desc_ctx(shash); + barrier_data(shash_desc_ctx(shash)); + + return icrc; +} + +/** + * rxe_icrc_hdr - Compute a partial ICRC for the IB transport headers. + * @pkt: Information about the current packet + * @skb: The packet buffer + * + * Returns the partial ICRC + */ +static u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb) { unsigned int bth_offset = 0; struct iphdr *ip4h = NULL; @@ -71,9 +107,9 @@ u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb) /** * rxe_icrc_check - Compute ICRC for a packet and compare to the ICRC * delivered in the packet. - * @skb: The packet buffer with packet info in skb->cb[] (receive path) + * @skb: packet buffer with packet info in skb->cb[] (receive path) * - * Returns 0 on success or an error on failure + * Returns 0 if the ICRCs match or an error on failure */ int rxe_icrc_check(struct sk_buff *skb) { @@ -106,7 +142,11 @@ int rxe_icrc_check(struct sk_buff *skb) return 0; } -/* rxe_icrc_generate- compute ICRC for a packet. */ +/** + * rxe_icrc_generate - Compute ICRC for a packet. + * @pkt: packet information + * @skb: packet buffer + */ void rxe_icrc_generate(struct rxe_pkt_info *pkt, struct sk_buff *skb) { __be32 *icrcp; diff --git a/drivers/infiniband/sw/rxe/rxe_loc.h b/drivers/infiniband/sw/rxe/rxe_loc.h index 2c724b9970d6..b08689b664ec 100644 --- a/drivers/infiniband/sw/rxe/rxe_loc.h +++ b/drivers/infiniband/sw/rxe/rxe_loc.h @@ -193,7 +193,6 @@ int rxe_requester(void *arg); int rxe_responder(void *arg); /* rxe_icrc.c */ -u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb); int rxe_icrc_check(struct sk_buff *skb); void rxe_icrc_generate(struct rxe_pkt_info *pkt, struct sk_buff *skb); -- 2.30.2