From patchwork Thu May 20 18:17:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 443831 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, 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 AAAEBC433B4 for ; Thu, 20 May 2021 18:15:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C9F361002 for ; Thu, 20 May 2021 18:15:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234833AbhETSRD (ORCPT ); Thu, 20 May 2021 14:17:03 -0400 Received: from mga17.intel.com ([192.55.52.151]:9108 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233920AbhETSQy (ORCPT ); Thu, 20 May 2021 14:16:54 -0400 IronPort-SDR: EF8zoROBSloHTK6J/9P3Og5J78SF/BIbRLgE6ro3+NPPtFMAYeR4PWRko/0icbDRcKJboQDdSl CTJi9hgw8tnQ== X-IronPort-AV: E=McAfee;i="6200,9189,9990"; a="181579464" X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="181579464" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 May 2021 11:15:33 -0700 IronPort-SDR: q96eFXaJ6aCCH18x1cPcv37tsB17ATTeBUufuoKgQATpTXBUv4FRFk/Dp7R/8YPKm3MfNpVPus PelQXiEK6PsA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.82,313,1613462400"; d="scan'208";a="440670759" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by fmsmga008.fm.intel.com with ESMTP; 20 May 2021 11:15:32 -0700 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Andre Guedes , netdev@vger.kernel.org, sassmann@redhat.com, anthony.l.nguyen@intel.com, magnus.karlsson@intel.com, maciej.fijalkowski@intel.com, sasha.neftin@intel.com, vitaly.lifshits@intel.com, Vedang Patel , Jithu Joseph , Dvora Fuxbrumer Subject: [PATCH net-next v2 7/9] igc: Replace IGC_TX_FLAGS_XDP flag by an enum Date: Thu, 20 May 2021 11:17:42 -0700 Message-Id: <20210520181744.2217191-8-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210520181744.2217191-1-anthony.l.nguyen@intel.com> References: <20210520181744.2217191-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Andre Guedes Up to this point, Tx buffers are associated with either a skb or a xdpf, and the IGC_TX_FLAGS_XDP flag was enough to distinguish between these two case. However, with upcoming patches that will add AF_XDP zero-copy support, a third case will be introduced so this flag-based approach won't fit well. In preparation to land AF_XDP zero-copy support, replace the IGC_TX_FLAGS_XDP flag by an enum which will be extended once zero-copy support is introduced to the driver. Signed-off-by: Andre Guedes Signed-off-by: Vedang Patel Signed-off-by: Jithu Joseph Reviewed-by: Maciej Fijalkowski Tested-by: Dvora Fuxbrumer Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/igc/igc.h | 8 ++++++-- drivers/net/ethernet/intel/igc/igc_main.c | 25 ++++++++++++++++++----- 2 files changed, 26 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index 25871351730b..4815c520652b 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -390,8 +390,6 @@ enum igc_tx_flags { /* olinfo flags */ IGC_TX_FLAGS_IPV4 = 0x10, IGC_TX_FLAGS_CSUM = 0x20, - - IGC_TX_FLAGS_XDP = 0x100, }; enum igc_boards { @@ -408,12 +406,18 @@ enum igc_boards { #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IGC_MAX_DATA_PER_TXD) #define DESC_NEEDED (MAX_SKB_FRAGS + 4) +enum igc_tx_buffer_type { + IGC_TX_BUFFER_TYPE_SKB, + IGC_TX_BUFFER_TYPE_XDP, +}; + /* wrapper around a pointer to a socket buffer, * so a DMA handle can be stored along with the buffer */ struct igc_tx_buffer { union igc_adv_tx_desc *next_to_watch; unsigned long time_stamp; + enum igc_tx_buffer_type type; union { struct sk_buff *skb; struct xdp_frame *xdpf; diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index ebb57d82e4dd..4e1327a5a61e 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -191,10 +191,17 @@ static void igc_clean_tx_ring(struct igc_ring *tx_ring) while (i != tx_ring->next_to_use) { union igc_adv_tx_desc *eop_desc, *tx_desc; - if (tx_buffer->tx_flags & IGC_TX_FLAGS_XDP) + switch (tx_buffer->type) { + case IGC_TX_BUFFER_TYPE_XDP: xdp_return_frame(tx_buffer->xdpf); - else + break; + case IGC_TX_BUFFER_TYPE_SKB: dev_kfree_skb_any(tx_buffer->skb); + break; + default: + netdev_warn_once(tx_ring->netdev, "Unknown Tx buffer type\n"); + break; + } igc_unmap_tx_buffer(tx_ring->dev, tx_buffer); @@ -1360,6 +1367,7 @@ static netdev_tx_t igc_xmit_frame_ring(struct sk_buff *skb, /* record the location of the first descriptor for this packet */ first = &tx_ring->tx_buffer_info[tx_ring->next_to_use]; + first->type = IGC_TX_BUFFER_TYPE_SKB; first->skb = skb; first->bytecount = skb->len; first->gso_segs = 1; @@ -1943,8 +1951,8 @@ static int igc_xdp_init_tx_buffer(struct igc_tx_buffer *buffer, return -ENOMEM; } + buffer->type = IGC_TX_BUFFER_TYPE_XDP; buffer->xdpf = xdpf; - buffer->tx_flags = IGC_TX_FLAGS_XDP; buffer->protocol = 0; buffer->bytecount = xdpf->len; buffer->gso_segs = 1; @@ -2305,10 +2313,17 @@ static bool igc_clean_tx_irq(struct igc_q_vector *q_vector, int napi_budget) total_bytes += tx_buffer->bytecount; total_packets += tx_buffer->gso_segs; - if (tx_buffer->tx_flags & IGC_TX_FLAGS_XDP) + switch (tx_buffer->type) { + case IGC_TX_BUFFER_TYPE_XDP: xdp_return_frame(tx_buffer->xdpf); - else + break; + case IGC_TX_BUFFER_TYPE_SKB: napi_consume_skb(tx_buffer->skb, napi_budget); + break; + default: + netdev_warn_once(tx_ring->netdev, "Unknown Tx buffer type\n"); + break; + } igc_unmap_tx_buffer(tx_ring->dev, tx_buffer);