From patchwork Tue Feb 2 08:16:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Chulski X-Patchwork-Id: 12061005 X-Patchwork-Delegate: kuba@kernel.org 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 0909CC433E0 for ; Tue, 2 Feb 2021 08:19:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C28E064EFE for ; Tue, 2 Feb 2021 08:19:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232508AbhBBITE (ORCPT ); Tue, 2 Feb 2021 03:19:04 -0500 Received: from mx0a-0016f401.pphosted.com ([67.231.148.174]:14190 "EHLO mx0b-0016f401.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S232466AbhBBISu (ORCPT ); Tue, 2 Feb 2021 03:18:50 -0500 Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1128AT7j016533; Tue, 2 Feb 2021 00:18:02 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=8IUf7vqinngQfZFrVANEASlSKRG8tSSA9G2MXrBXfsY=; b=cjk/O46ld1yRiDTHd0YN19qXfLUqwMRIpHRWA+gCm6PBaXBlqOMHChliVyFCbP65ikrJ 2+8Sci7UcXReFLpbAARt/jRC+Ot+xlqFqmSrjhqGl3TrCZ1/1EfXF+G9xA437SHy8Zue CLJ3T1oo8gJOwdU0KZnm20EZXIObQCVArXz9FzD079ozCyrXGgRQvsdX1izJN+UEzCWg EqtWRVru/cwnGDdRC+hv8P5Cpq8Gz989M59PHppR6WizQ0lnJihBCPs/gU9ki1tpm0bu vwn83ZSJngLLD/sl/g5MBd7yZkJKdiKruffdKS7s9PfLnJjc2fY99o7AcdapPrc4XCih Cg== Received: from dc5-exch01.marvell.com ([199.233.59.181]) by mx0a-0016f401.pphosted.com with ESMTP id 36d5psxp2a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 02 Feb 2021 00:18:02 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 2 Feb 2021 00:18:01 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 2 Feb 2021 00:18:01 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id 2FF423F703F; Tue, 2 Feb 2021 00:17:57 -0800 (PST) From: To: CC: , , , , , , , , , , , Subject: [PATCH v7 net-next 08/15] net: mvpp2: add FCA RXQ non occupied descriptor threshold Date: Tue, 2 Feb 2021 10:16:54 +0200 Message-ID: <1612253821-1148-9-git-send-email-stefanc@marvell.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1612253821-1148-1-git-send-email-stefanc@marvell.com> References: <1612253821-1148-1-git-send-email-stefanc@marvell.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.737 definitions=2021-02-02_04:2021-01-29,2021-02-02 signatures=0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Stefan Chulski The firmware needs to monitor the RX Non-occupied descriptor bits for flow control to move to XOFF mode. These bits need to be unmasked to be functional, but they will not raise interrupts as we leave the RX exception summary bit in MVPP2_ISR_RX_TX_MASK_REG clear. Signed-off-by: Stefan Chulski --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 3 ++ drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 44 ++++++++++++++++---- 2 files changed, 40 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h index 73f087c..ca84995 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -295,6 +295,8 @@ #define MVPP2_PON_CAUSE_TXP_OCCUP_DESC_ALL_MASK 0x3fc00000 #define MVPP2_PON_CAUSE_MISC_SUM_MASK BIT(31) #define MVPP2_ISR_MISC_CAUSE_REG 0x55b0 +#define MVPP2_ISR_RX_ERR_CAUSE_REG(port) (0x5520 + 4 * (port)) +#define MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK 0x00ff /* Buffer Manager registers */ #define MVPP2_BM_POOL_BASE_REG(pool) (0x6000 + ((pool) * 4)) @@ -764,6 +766,7 @@ #define MSS_SRAM_SIZE 0x800 #define FC_QUANTA 0xFFFF #define FC_CLK_DIVIDER 100 +#define MSS_THRESHOLD_STOP 768 /* RX buffer constants */ #define MVPP2_SKB_SHINFO_SIZE \ diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 6e59d07..19a3f38 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -1134,14 +1134,19 @@ static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec) static void mvpp2_interrupts_mask(void *arg) { struct mvpp2_port *port = arg; + int cpu = smp_processor_id(); + u32 thread; /* If the thread isn't used, don't do anything */ - if (smp_processor_id() > port->priv->nthreads) + if (cpu >= port->priv->nthreads) return; - mvpp2_thread_write(port->priv, - mvpp2_cpu_to_thread(port->priv, smp_processor_id()), + thread = mvpp2_cpu_to_thread(port->priv, cpu); + + mvpp2_thread_write(port->priv, thread, MVPP2_ISR_RX_TX_MASK_REG(port->id), 0); + mvpp2_thread_write(port->priv, thread, + MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 0); } /* Unmask the current thread's Rx/Tx interrupts. @@ -1151,20 +1156,25 @@ static void mvpp2_interrupts_mask(void *arg) static void mvpp2_interrupts_unmask(void *arg) { struct mvpp2_port *port = arg; - u32 val; + int cpu = smp_processor_id(); + u32 val, thread; /* If the thread isn't used, don't do anything */ - if (smp_processor_id() > port->priv->nthreads) + if (cpu >= port->priv->nthreads) return; + thread = mvpp2_cpu_to_thread(port->priv, cpu); + val = MVPP2_CAUSE_MISC_SUM_MASK | MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version); if (port->has_tx_irqs) val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK; - mvpp2_thread_write(port->priv, - mvpp2_cpu_to_thread(port->priv, smp_processor_id()), + mvpp2_thread_write(port->priv, thread, MVPP2_ISR_RX_TX_MASK_REG(port->id), val); + mvpp2_thread_write(port->priv, thread, + MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), + MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); } static void @@ -1189,6 +1199,9 @@ static void mvpp2_interrupts_unmask(void *arg) mvpp2_thread_write(port->priv, v->sw_thread_id, MVPP2_ISR_RX_TX_MASK_REG(port->id), val); + mvpp2_thread_write(port->priv, v->sw_thread_id, + MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), + MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK); } } @@ -2394,6 +2407,20 @@ static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port) } } +/* Set the number of non-occupied descriptors threshold */ +static void mvpp2_set_rxq_free_tresh(struct mvpp2_port *port, + struct mvpp2_rx_queue *rxq) +{ + u32 val; + + mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id); + + val = mvpp2_read(port->priv, MVPP2_RXQ_THRESH_REG); + val &= ~MVPP2_RXQ_NON_OCCUPIED_MASK; + val |= MSS_THRESHOLD_STOP << MVPP2_RXQ_NON_OCCUPIED_OFFSET; + mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val); +} + /* Set the number of packets that will be received before Rx interrupt * will be generated by HW. */ @@ -2649,6 +2676,9 @@ static int mvpp2_rxq_init(struct mvpp2_port *port, mvpp2_rx_pkts_coal_set(port, rxq); mvpp2_rx_time_coal_set(port, rxq); + /* Set the number of non occupied descriptors threshold */ + mvpp2_set_rxq_free_tresh(port, rxq); + /* Add number of descriptors ready for receiving packets */ mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size);