From patchwork Thu Aug 29 15:50:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Bogendoerfer X-Patchwork-Id: 11121765 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F18DB14E5 for ; Thu, 29 Aug 2019 15:51:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA2B723405 for ; Thu, 29 Aug 2019 15:51:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728314AbfH2Pui (ORCPT ); Thu, 29 Aug 2019 11:50:38 -0400 Received: from mx2.suse.de ([195.135.220.15]:32836 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728248AbfH2Puh (ORCPT ); Thu, 29 Aug 2019 11:50:37 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id AAE26B69E; Thu, 29 Aug 2019 15:50:34 +0000 (UTC) From: Thomas Bogendoerfer To: Ralf Baechle , Paul Burton , James Hogan , "David S. Miller" , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v2 net-next 05/15] net: sgi: ioc3-eth: allocate space for desc rings only once Date: Thu, 29 Aug 2019 17:50:03 +0200 Message-Id: <20190829155014.9229-6-tbogendoerfer@suse.de> X-Mailer: git-send-email 2.13.7 In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de> References: <20190829155014.9229-1-tbogendoerfer@suse.de> Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Memory for descriptor rings are allocated/freed, when interface is brought up/down. Since the size of the rings is not changeable by hardware, we now allocate rings now during probe and free it, when device is removed. Signed-off-by: Thomas Bogendoerfer --- drivers/net/ethernet/sgi/ioc3-eth.c | 103 ++++++++++++++++++------------------ 1 file changed, 51 insertions(+), 52 deletions(-) diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c index ba18a53fbbe6..d9d94a55ac34 100644 --- a/drivers/net/ethernet/sgi/ioc3-eth.c +++ b/drivers/net/ethernet/sgi/ioc3-eth.c @@ -803,25 +803,17 @@ static void ioc3_free_rings(struct ioc3_private *ip) struct sk_buff *skb; int rx_entry, n_entry; - if (ip->txr) { - ioc3_clean_tx_ring(ip); - free_pages((unsigned long)ip->txr, 2); - ip->txr = NULL; - } + ioc3_clean_tx_ring(ip); - if (ip->rxr) { - n_entry = ip->rx_ci; - rx_entry = ip->rx_pi; + n_entry = ip->rx_ci; + rx_entry = ip->rx_pi; - while (n_entry != rx_entry) { - skb = ip->rx_skbs[n_entry]; - if (skb) - dev_kfree_skb_any(skb); + while (n_entry != rx_entry) { + skb = ip->rx_skbs[n_entry]; + if (skb) + dev_kfree_skb_any(skb); - n_entry = (n_entry + 1) & RX_RING_MASK; - } - free_page((unsigned long)ip->rxr); - ip->rxr = NULL; + n_entry = (n_entry + 1) & RX_RING_MASK; } } @@ -829,49 +821,34 @@ static void ioc3_alloc_rings(struct net_device *dev) { struct ioc3_private *ip = netdev_priv(dev); struct ioc3_erxbuf *rxb; - unsigned long *rxr; int i; - if (!ip->rxr) { - /* Allocate and initialize rx ring. 4kb = 512 entries */ - ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC); - rxr = ip->rxr; - if (!rxr) - pr_err("%s: get_zeroed_page() failed!\n", __func__); - - /* Now the rx buffers. The RX ring may be larger but - * we only allocate 16 buffers for now. Need to tune - * this for performance and memory later. - */ - for (i = 0; i < RX_BUFFS; i++) { - struct sk_buff *skb; + /* Now the rx buffers. The RX ring may be larger but + * we only allocate 16 buffers for now. Need to tune + * this for performance and memory later. + */ + for (i = 0; i < RX_BUFFS; i++) { + struct sk_buff *skb; - skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC); - if (!skb) { - show_free_areas(0, NULL); - continue; - } + skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC); + if (!skb) { + show_free_areas(0, NULL); + continue; + } - ip->rx_skbs[i] = skb; + ip->rx_skbs[i] = skb; - /* Because we reserve afterwards. */ - skb_put(skb, (1664 + RX_OFFSET)); - rxb = (struct ioc3_erxbuf *)skb->data; - rxr[i] = cpu_to_be64(ioc3_map(rxb, 1)); - skb_reserve(skb, RX_OFFSET); - } - ip->rx_ci = 0; - ip->rx_pi = RX_BUFFS; + /* Because we reserve afterwards. */ + skb_put(skb, (1664 + RX_OFFSET)); + rxb = (struct ioc3_erxbuf *)skb->data; + ip->rxr[i] = cpu_to_be64(ioc3_map(rxb, 1)); + skb_reserve(skb, RX_OFFSET); } + ip->rx_ci = 0; + ip->rx_pi = RX_BUFFS; - if (!ip->txr) { - /* Allocate and initialize tx rings. 16kb = 128 bufs. */ - ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2); - if (!ip->txr) - pr_err("%s: __get_free_pages() failed!\n", __func__); - ip->tx_pi = 0; - ip->tx_ci = 0; - } + ip->tx_pi = 0; + ip->tx_ci = 0; } static void ioc3_init_rings(struct net_device *dev) @@ -1239,6 +1216,23 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent) timer_setup(&ip->ioc3_timer, ioc3_timer, 0); ioc3_stop(ip); + + /* Allocate and rx ring. 4kb = 512 entries */ + ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC); + if (!ip->rxr) { + pr_err("ioc3-eth: rx ring allocation failed\n"); + err = -ENOMEM; + goto out_stop; + } + + /* Allocate tx rings. 16kb = 128 bufs. */ + ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2); + if (!ip->txr) { + pr_err("ioc3-eth: tx ring allocation failed\n"); + err = -ENOMEM; + goto out_stop; + } + ioc3_init(dev); ip->pdev = pdev; @@ -1293,6 +1287,8 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent) ioc3_stop(ip); del_timer_sync(&ip->ioc3_timer); ioc3_free_rings(ip); + kfree(ip->rxr); + kfree(ip->txr); out_res: pci_release_regions(pdev); out_free: @@ -1310,6 +1306,9 @@ static void ioc3_remove_one(struct pci_dev *pdev) struct net_device *dev = pci_get_drvdata(pdev); struct ioc3_private *ip = netdev_priv(dev); + kfree(ip->rxr); + kfree(ip->txr); + unregister_netdev(dev); del_timer_sync(&ip->ioc3_timer);