From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3B5E1C08 for ; Wed, 28 Dec 2022 16:42:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40E8BC433EF; Wed, 28 Dec 2022 16:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672245761; bh=Ftmd9MOwYC0jJGKz6xA4bYBxWvR0KhrwihV0mKET/wU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=01EhVTzhJ5oq9JBS01TsQOC3V/ANLCcu2vjT3l+ghJEzi7zkmXbFT3Q9I5ldX06JX 3V5HILEzrUaQLb0EE6f7nmsv0jfCJiu+h/nOJv+DCz0/KRBIjg4X3GEM1xdN3z70z8 ekzRgUZEj3JcJ92mZtFAm7EgJOBeNyn+xdMEWWPs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Felix Fietkau , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.0 0950/1073] net: ethernet: mtk_eth_soc: drop packets to WDMA if the ring is full Date: Wed, 28 Dec 2022 15:42:18 +0100 Message-Id: <20221228144353.838800623@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Felix Fietkau [ Upstream commit f4b2fa2c25e1ade78f766aa82e733a0b5198d484 ] Improves handling of DMA ring overflow. Clarify other WDMA drop related comment. Signed-off-by: Felix Fietkau Link: https://lore.kernel.org/r/20221116080734.44013-3-nbd@nbd.name Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 5 ++++- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 4c16f2df566f..559c7a42c1c9 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -3344,9 +3344,12 @@ static int mtk_hw_init(struct mtk_eth *eth) mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { - /* PSE should not drop port8 and port9 packets */ + /* PSE should not drop port8 and port9 packets from WDMA Tx */ mtk_w32(eth, 0x00000300, PSE_DROP_CFG); + /* PSE should drop packets to port 8/9 on WDMA Rx ring full */ + mtk_w32(eth, 0x00000300, PSE_PPE0_DROP); + /* PSE Free Queue Flow Control */ mtk_w32(eth, 0x01fa01f4, PSE_FQFC_CFG2); diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index da261dd49d6f..df8e6e95254e 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -121,6 +121,7 @@ #define PSE_FQFC_CFG1 0x100 #define PSE_FQFC_CFG2 0x104 #define PSE_DROP_CFG 0x108 +#define PSE_PPE0_DROP 0x110 /* PSE Input Queue Reservation Register*/ #define PSE_IQ_REV(x) (0x140 + (((x) - 1) << 2)) -- 2.35.1