From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A387EC2BD09 for ; Mon, 9 Dec 2019 07:57:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7D87F206D3 for ; Mon, 9 Dec 2019 07:57:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727263AbfLIH5R (ORCPT ); Mon, 9 Dec 2019 02:57:17 -0500 Received: from mga05.intel.com ([192.55.52.43]:35353 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727044AbfLIH5Q (ORCPT ); Mon, 9 Dec 2019 02:57:16 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Dec 2019 23:57:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,294,1571727600"; d="scan'208";a="362846917" Received: from mkarlsso-mobl.ger.corp.intel.com (HELO localhost.localdomain) ([10.249.32.126]) by orsmga004.jf.intel.com with ESMTP; 08 Dec 2019 23:57:01 -0800 From: Magnus Karlsson To: magnus.karlsson@intel.com, bjorn.topel@intel.com, ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, jonathan.lemon@gmail.com Cc: bpf@vger.kernel.org, saeedm@mellanox.com, jeffrey.t.kirsher@intel.com, maciej.fijalkowski@intel.com, maciejromanfijalkowski@gmail.com Subject: [PATCH bpf-next 06/12] xsk: simplify xskq_nb_avail and xskq_nb_free Date: Mon, 9 Dec 2019 08:56:23 +0100 Message-Id: <1575878189-31860-7-git-send-email-magnus.karlsson@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1575878189-31860-1-git-send-email-magnus.karlsson@intel.com> References: <1575878189-31860-1-git-send-email-magnus.karlsson@intel.com> Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org At this point, there are no users of the functions xskq_nb_avail and xskq_nb_free that take any other number of entries argument than 1, so let us get rid of the second argument that takes the number of entries. Signed-off-by: Magnus Karlsson --- net/xdp/xsk_queue.h | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h index e3ae62d..deda03c 100644 --- a/net/xdp/xsk_queue.h +++ b/net/xdp/xsk_queue.h @@ -89,7 +89,7 @@ static inline u64 xskq_nb_invalid_descs(struct xsk_queue *q) return q ? q->invalid_descs : 0; } -static inline u32 xskq_nb_avail(struct xsk_queue *q, u32 dcnt) +static inline u32 xskq_nb_avail(struct xsk_queue *q) { u32 entries = q->cached_prod - q->cons_tail; @@ -99,19 +99,21 @@ static inline u32 xskq_nb_avail(struct xsk_queue *q, u32 dcnt) entries = q->cached_prod - q->cons_tail; } - return (entries > dcnt) ? dcnt : entries; + return entries; } -static inline u32 xskq_nb_free(struct xsk_queue *q, u32 dcnt) +static inline bool xskq_prod_is_full(struct xsk_queue *q) { u32 free_entries = q->nentries - (q->cached_prod - q->cons_tail); - if (free_entries >= dcnt) - return free_entries; + if (free_entries) + return false; /* Refresh the local tail pointer */ q->cons_tail = READ_ONCE(q->ring->consumer); - return q->nentries - (q->cached_prod - q->cons_tail); + free_entries = q->nentries - (q->cached_prod - q->cons_tail); + + return !free_entries; } static inline bool xskq_has_addrs(struct xsk_queue *q, u32 cnt) @@ -200,7 +202,7 @@ static inline u64 *xskq_peek_addr(struct xsk_queue *q, u64 *addr, if (q->cons_tail == q->cons_head) { smp_mb(); /* D, matches A */ WRITE_ONCE(q->ring->consumer, q->cons_tail); - q->cons_head = q->cons_tail + xskq_nb_avail(q, 1); + q->cons_head = q->cons_tail + xskq_nb_avail(q); /* Order consumer and data */ smp_rmb(); @@ -216,7 +218,7 @@ static inline void xskq_discard_addr(struct xsk_queue *q) static inline int xskq_prod_reserve(struct xsk_queue *q) { - if (xskq_nb_free(q, 1) == 0) + if (xskq_prod_is_full(q)) return -ENOSPC; /* A, matches D */ @@ -228,7 +230,7 @@ static inline int xskq_prod_reserve_addr(struct xsk_queue *q, u64 addr) { struct xdp_umem_ring *ring = (struct xdp_umem_ring *)q->ring; - if (xskq_nb_free(q, 1) == 0) + if (xskq_prod_is_full(q)) return -ENOSPC; /* A, matches D */ @@ -318,7 +320,7 @@ static inline struct xdp_desc *xskq_peek_desc(struct xsk_queue *q, if (q->cons_tail == q->cons_head) { smp_mb(); /* D, matches A */ WRITE_ONCE(q->ring->consumer, q->cons_tail); - q->cons_head = q->cons_tail + xskq_nb_avail(q, 1); + q->cons_head = q->cons_tail + xskq_nb_avail(q); /* Order consumer and data */ smp_rmb(); /* C, matches B */ @@ -338,7 +340,7 @@ static inline int xskq_prod_reserve_desc(struct xsk_queue *q, struct xdp_rxtx_ring *ring = (struct xdp_rxtx_ring *)q->ring; u32 idx; - if (xskq_nb_free(q, 1) == 0) + if (xskq_prod_is_full(q)) return -ENOSPC; /* A, matches D */ -- 2.7.4