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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E88EC4332F for ; Wed, 23 Nov 2022 20:32:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239738AbiKWUcQ (ORCPT ); Wed, 23 Nov 2022 15:32:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239064AbiKWUbI (ORCPT ); Wed, 23 Nov 2022 15:31:08 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B2F0B46; Wed, 23 Nov 2022 12:27:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1669235247; x=1700771247; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=iKDTlOAUZqqB5RQV8RImjoFEKIKyw5FL5Cc7xV3NePg=; b=ihj3wKVO9hnRNld1pAUpHgTe1ukP3WggtLea3/HiVg9yKraZPdaFFqLk n7PVLsZfO6RAazz9wJztKN6ufEgRh6ZSpRxbm3cxtS5WT4wrQb4yJ/IBB kQWRyD2kA+Fgesh9fmyDV5NLSr2kxLy+tUv70tBarQHvhjgBA8eFKmUZB S7+bet21Jgzk298xFeo471MzbBeDZBQoY2BMBJUmkdvkZQ3HTASeruv+M lwXDZhkuXuO7tTbwSiNbXCgcrqxJnAY2Osw7kwJgRe9tI4LlMI12cHYhZ VyyTg5bjNSFCej6NRmuDCWxGJAy6wsxJ8UK8BD11G2/X2FY0u/0pOm1t2 A==; X-IronPort-AV: E=Sophos;i="5.96,187,1665471600"; d="scan'208";a="184921921" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 23 Nov 2022 13:27:26 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Wed, 23 Nov 2022 13:27:21 -0700 Received: from soft-dev3-1.microsemi.net (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Wed, 23 Nov 2022 13:27:18 -0700 From: Horatiu Vultur To: , , CC: , , , , , , , , , , , Horatiu Vultur Subject: [PATCH net-next v5 5/7] net: lan966x: Update dma_dir of page_pool_params Date: Wed, 23 Nov 2022 21:31:37 +0100 Message-ID: <20221123203139.3828548-6-horatiu.vultur@microchip.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221123203139.3828548-1-horatiu.vultur@microchip.com> References: <20221123203139.3828548-1-horatiu.vultur@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To add support for XDP_TX it is required to be able to write to the DMA area therefore it is required that the pages will be mapped using DMA_BIDIRECTIONAL flag. Therefore check if there are any xdp programs on the interfaces and in that case set DMA_BIDRECTIONAL otherwise use DMA_FROM_DEVICE. Therefore when a new XDP program is added it is required to redo the page_pool. Signed-off-by: Horatiu Vultur --- .../ethernet/microchip/lan966x/lan966x_fdma.c | 29 +++++++++++++++---- .../ethernet/microchip/lan966x/lan966x_main.h | 2 ++ .../ethernet/microchip/lan966x/lan966x_xdp.c | 28 ++++++++++++++++++ 3 files changed, 53 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c index 3df3b3d29b4ff..bc30c31c43602 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdma.c @@ -79,6 +79,9 @@ static int lan966x_fdma_rx_alloc_page_pool(struct lan966x_rx *rx) SKB_DATA_ALIGN(sizeof(struct skb_shared_info)), }; + if (lan966x_xdp_present(lan966x)) + pp_params.dma_dir = DMA_BIDIRECTIONAL; + rx->page_pool = page_pool_create(&pp_params); for (int i = 0; i < lan966x->num_phys_ports; ++i) { @@ -826,16 +829,11 @@ static int lan966x_fdma_get_max_frame(struct lan966x *lan966x) XDP_PACKET_HEADROOM; } -int lan966x_fdma_change_mtu(struct lan966x *lan966x) +static int __lan966x_fdma_reload(struct lan966x *lan966x, int max_mtu) { - int max_mtu; int err; u32 val; - max_mtu = lan966x_fdma_get_max_frame(lan966x); - if (max_mtu == lan966x->rx.max_mtu) - return 0; - /* Disable the CPU port */ lan_rmw(QSYS_SW_PORT_MODE_PORT_ENA_SET(0), QSYS_SW_PORT_MODE_PORT_ENA, @@ -861,6 +859,25 @@ int lan966x_fdma_change_mtu(struct lan966x *lan966x) return err; } +int lan966x_fdma_change_mtu(struct lan966x *lan966x) +{ + int max_mtu; + + max_mtu = lan966x_fdma_get_max_frame(lan966x); + if (max_mtu == lan966x->rx.max_mtu) + return 0; + + return __lan966x_fdma_reload(lan966x, max_mtu); +} + +int lan966x_fdma_reload_page_pool(struct lan966x *lan966x) +{ + int max_mtu; + + max_mtu = lan966x_fdma_get_max_frame(lan966x); + return __lan966x_fdma_reload(lan966x, max_mtu); +} + void lan966x_fdma_netdev_init(struct lan966x *lan966x, struct net_device *dev) { if (lan966x->fdma_ndev) diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h index c762e3732f88f..81c0b11097ce2 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h @@ -466,6 +466,7 @@ void lan966x_fdma_netdev_deinit(struct lan966x *lan966x, struct net_device *dev) int lan966x_fdma_init(struct lan966x *lan966x); void lan966x_fdma_deinit(struct lan966x *lan966x); irqreturn_t lan966x_fdma_irq_handler(int irq, void *args); +int lan966x_fdma_reload_page_pool(struct lan966x *lan966x); int lan966x_lag_port_join(struct lan966x_port *port, struct net_device *brport_dev, @@ -556,6 +557,7 @@ int lan966x_xdp(struct net_device *dev, struct netdev_bpf *xdp); int lan966x_xdp_run(struct lan966x_port *port, struct page *page, u32 data_len); +bool lan966x_xdp_present(struct lan966x *lan966x); static inline bool lan966x_xdp_port_present(struct lan966x_port *port) { return !!port->xdp_prog; diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c index 8ebde1eb6a09c..ba7aa6df9d0e6 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_xdp.c @@ -11,6 +11,8 @@ static int lan966x_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp) struct lan966x_port *port = netdev_priv(dev); struct lan966x *lan966x = port->lan966x; struct bpf_prog *old_prog; + bool old_xdp, new_xdp; + int err; if (!lan966x->fdma) { NL_SET_ERR_MSG_MOD(xdp->extack, @@ -18,7 +20,20 @@ static int lan966x_xdp_setup(struct net_device *dev, struct netdev_bpf *xdp) return -EOPNOTSUPP; } + old_xdp = lan966x_xdp_present(lan966x); old_prog = xchg(&port->xdp_prog, xdp->prog); + new_xdp = lan966x_xdp_present(lan966x); + + if (old_xdp == new_xdp) + goto out; + + err = lan966x_fdma_reload_page_pool(lan966x); + if (err) { + xchg(&port->xdp_prog, old_prog); + return err; + } + +out: if (old_prog) bpf_prog_put(old_prog); @@ -62,6 +77,19 @@ int lan966x_xdp_run(struct lan966x_port *port, struct page *page, u32 data_len) } } +bool lan966x_xdp_present(struct lan966x *lan966x) +{ + for (int p = 0; p < lan966x->num_phys_ports; ++p) { + if (!lan966x->ports[p]) + continue; + + if (lan966x_xdp_port_present(lan966x->ports[p])) + return true; + } + + return false; +} + int lan966x_xdp_port_init(struct lan966x_port *port) { struct lan966x *lan966x = port->lan966x; -- 2.38.0