From patchwork Wed Aug 31 22:40:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Elder X-Patchwork-Id: 12961493 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE1F1ECAAD5 for ; Wed, 31 Aug 2022 22:40:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232591AbiHaWk2 (ORCPT ); Wed, 31 Aug 2022 18:40:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232560AbiHaWk0 (ORCPT ); Wed, 31 Aug 2022 18:40:26 -0400 Received: from mail-il1-x12c.google.com (mail-il1-x12c.google.com [IPv6:2607:f8b0:4864:20::12c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 833F489CD7 for ; Wed, 31 Aug 2022 15:40:25 -0700 (PDT) Received: by mail-il1-x12c.google.com with SMTP id b17so1010940ilh.0 for ; Wed, 31 Aug 2022 15:40:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=FNHBw9fAedMEvmueNQFIEpZu4DZG/pmo27+myDmJUYQ=; b=T4votMRvaQ5gheXuQ8nqesjK6N7/oipC1fShu8/sYxhIl1eT5ugqduWyPd6Xo+1/m1 VuA+nHG6q86XBBw7yqRuZEmaynql9i2p8pH6a1wYyx9QGh0Svd5TB2xhmxBU812C8+zV ads0kaQW4PeB+o81cfvyjI8czR28khqo+ApnPCQR5kUCBathcxecfY7ABOaTIl4MHyAo qKSMdpe7K3dsxrusIH7NKSvPlBJdRGzhQrUccS7GkfaHg0GWyT9OYmG60RO687k0jBal Exo24UwsDrQKyOgdf8OphQmvr9O9W4eAQW2C9hJ10xhN3qiVrHWv0jjqhm96JPXc+pao pcIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=FNHBw9fAedMEvmueNQFIEpZu4DZG/pmo27+myDmJUYQ=; b=aexqsZkTxjPCEKUvHnLMJ7F002JA/zJYxq2MWPglK0pXGigN/DJr1kVZRxndSDh7rA VVaMJsyv2vJNCZu/UdD+X7F7dER44BAw5BZTxNC8Jfgj2gMbR25DSQPuXKGLs3TV+EZj RTdw/njo8CruuXOVsz953ddHBJDHZwt2Xh0zCACtyE8weIuNWqJ+G835WbMu21N1GQTq HCqBLOcFP4dlN8lRqeb8/ArmKNwQjuis5YRf3nrpVGPPylY41ir8ViC00yEtBdbJ04MX DqjT5gAhkHQpIL+GXA8PEtS3t9ODwOFKwdlK7QZZ0yenUVCo2h0tCfuiacS9sio4i7yk 2m3w== X-Gm-Message-State: ACgBeo0ZCpaInid7J0t1fkoBJ/LjoH4yg/tySLmWKkyS1tK11cqKIpEQ 4uXY+X7mBqoM27fYyAi0wkgj/g== X-Google-Smtp-Source: AA6agR43T90S0/2mpnSBwJQNSAN7MM04L/zu9Nh52MTHPfKq+mm6Fc/rmuVLv10fg+Ehm7vPtiDGqA== X-Received: by 2002:a05:6e02:1524:b0:2ec:71c6:7b85 with SMTP id i4-20020a056e02152400b002ec71c67b85mr1042342ilu.237.1661985624914; Wed, 31 Aug 2022 15:40:24 -0700 (PDT) Received: from localhost.localdomain ([98.61.227.136]) by smtp.gmail.com with ESMTPSA id n30-20020a02a19e000000b0034c0db05629sm1392005jah.161.2022.08.31.15.40.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Aug 2022 15:40:24 -0700 (PDT) From: Alex Elder To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: mka@chromium.org, evgreen@chromium.org, bjorn.andersson@linaro.org, quic_cpratapa@quicinc.com, quic_avuyyuru@quicinc.com, quic_jponduru@quicinc.com, quic_subashab@quicinc.com, elder@kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 3/6] net: ipa: track committed transactions with an ID Date: Wed, 31 Aug 2022 17:40:14 -0500 Message-Id: <20220831224017.377745-4-elder@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220831224017.377745-1-elder@linaro.org> References: <20220831224017.377745-1-elder@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a transaction ID field to track the first element in a channel's transaction array that has been committed, but not yet passed to the hardware. Advance the ID when the hardware is notified via doorbell that TREs from a transaction are ready for consumption. Temporarily add warnings that verify that the first committed transaction tracked by the ID matches the first element on the committed list, both when committing and pending (at doorbell). Remove the temporary warnings added by the previous commit. Signed-off-by: Alex Elder --- drivers/net/ipa/gsi.h | 1 + drivers/net/ipa/gsi_trans.c | 45 +++++++++++++++++++++++-------------- 2 files changed, 29 insertions(+), 17 deletions(-) diff --git a/drivers/net/ipa/gsi.h b/drivers/net/ipa/gsi.h index 6bbbda6f27eae..cc46a9119fc5b 100644 --- a/drivers/net/ipa/gsi.h +++ b/drivers/net/ipa/gsi.h @@ -85,6 +85,7 @@ struct gsi_trans_info { u16 free_id; /* first free trans in array */ u16 allocated_id; /* first allocated transaction */ + u16 committed_id; /* first committed transaction */ struct gsi_trans *trans; /* transaction array */ struct gsi_trans **map; /* TRE -> transaction map */ diff --git a/drivers/net/ipa/gsi_trans.c b/drivers/net/ipa/gsi_trans.c index d84400e13487f..72da795908fee 100644 --- a/drivers/net/ipa/gsi_trans.c +++ b/drivers/net/ipa/gsi_trans.c @@ -252,20 +252,17 @@ static void gsi_trans_move_committed(struct gsi_trans *trans) list_move_tail(&trans->links, &trans_info->committed); - trans = list_first_entry_or_null(&trans_info->alloc, - struct gsi_trans, links); + trans = list_first_entry(&trans_info->committed, + struct gsi_trans, links); spin_unlock_bh(&trans_info->spinlock); /* This allocated transaction is now committed */ trans_info->allocated_id++; - if (trans) { - trans_index = trans_info->allocated_id % channel->tre_count; - WARN_ON(trans != &trans_info->trans[trans_index]); - } else { - WARN_ON(trans_info->allocated_id != trans_info->free_id); - } + WARN_ON(trans_info->committed_id == trans_info->allocated_id); + trans_index = trans_info->committed_id % channel->tre_count; + WARN_ON(trans != &trans_info->trans[trans_index]); } /* Move transactions from the committed list to the pending list */ @@ -273,7 +270,9 @@ static void gsi_trans_move_pending(struct gsi_trans *trans) { struct gsi_channel *channel = &trans->gsi->channel[trans->channel_id]; struct gsi_trans_info *trans_info = &channel->trans_info; + u16 trans_index = trans - &trans_info->trans[0]; struct list_head list; + u16 delta; spin_lock_bh(&trans_info->spinlock); @@ -281,7 +280,22 @@ static void gsi_trans_move_pending(struct gsi_trans *trans) list_cut_position(&list, &trans_info->committed, &trans->links); list_splice_tail(&list, &trans_info->pending); + trans = list_first_entry_or_null(&trans_info->committed, + struct gsi_trans, links); + spin_unlock_bh(&trans_info->spinlock); + + /* These committed transactions are now pending */ + delta = trans_index - trans_info->committed_id + 1; + trans_info->committed_id += delta % channel->tre_count; + + if (trans) { + trans_index = trans_info->committed_id % channel->tre_count; + WARN_ON(trans != &trans_info->trans[trans_index]); + } else { + WARN_ON(trans_info->committed_id != + trans_info->allocated_id); + } } /* Move a transaction and all of its predecessors from the pending list @@ -392,14 +406,8 @@ struct gsi_trans *gsi_channel_trans_alloc(struct gsi *gsi, u32 channel_id, list_add_tail(&trans->links, &trans_info->alloc); - trans = list_first_entry(&trans_info->alloc, struct gsi_trans, links); - spin_unlock_bh(&trans_info->spinlock); - WARN_ON(trans_info->allocated_id == trans_info->free_id); - trans_index = trans_info->allocated_id % channel->tre_count; - WARN_ON(trans != &trans_info->trans[trans_index]); - return trans; } @@ -428,11 +436,13 @@ void gsi_trans_free(struct gsi_trans *trans) if (!last) return; - /* Unused transactions are allocated but never committed */ - if (!trans->used_count) + /* Unused transactions are allocated but never committed or pending */ + if (!trans->used_count) { trans_info->allocated_id++; - else + trans_info->committed_id++; + } else { ipa_gsi_trans_release(trans); + } /* Releasing the reserved TREs implicitly frees the sgl[] and * (if present) info[] arrays, plus the transaction itself. @@ -769,6 +779,7 @@ int gsi_channel_trans_init(struct gsi *gsi, u32 channel_id) return -ENOMEM; trans_info->free_id = 0; /* all modulo channel->tre_count */ trans_info->allocated_id = 0; + trans_info->committed_id = 0; /* A completion event contains a pointer to the TRE that caused * the event (which will be the last one used by the transaction).