From patchwork Wed Jan 17 07:27:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ganesh Goudar X-Patchwork-Id: 862064 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zLzFZ5xNsz9s7G for ; Wed, 17 Jan 2018 18:27:46 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752173AbeAQH1o (ORCPT ); Wed, 17 Jan 2018 02:27:44 -0500 Received: from stargate.chelsio.com ([12.32.117.8]:3014 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751080AbeAQH1n (ORCPT ); Wed, 17 Jan 2018 02:27:43 -0500 Received: from localhost (victim.blr.asicdesigners.com [10.193.185.129]) by stargate.chelsio.com (8.13.8/8.13.8) with ESMTP id w0H7RdfK023912; Tue, 16 Jan 2018 23:27:40 -0800 From: Ganesh Goudar To: netdev@vger.kernel.org, davem@davemloft.net Cc: nirranjan@chelsio.com, indranil@chelsio.com, venkatesh@chelsio.com, Ganesh Goudar , Kumar Sanghvi Subject: [PATCH net-next] cxgb4: IPv6 filter takes 2 tids Date: Wed, 17 Jan 2018 12:57:34 +0530 Message-Id: <1516174054-29791-1-git-send-email-ganeshgr@chelsio.com> X-Mailer: git-send-email 2.1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org on T6, IPv6 filter would occupy 2 tids instead of 4. Signed-off-by: Kumar Sanghvi Signed-off-by: Ganesh Goudar --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c | 113 +++++++++++++++------- 1 file changed, 80 insertions(+), 33 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c index 677a3ba..3177b0c 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c @@ -439,19 +439,32 @@ int cxgb4_get_free_ftid(struct net_device *dev, int family) if (ftid >= t->nftids) ftid = -1; } else { - ftid = bitmap_find_free_region(t->ftid_bmap, t->nftids, 2); - if (ftid < 0) - goto out_unlock; + if (is_t6(adap->params.chip)) { + ftid = bitmap_find_free_region(t->ftid_bmap, + t->nftids, 1); + if (ftid < 0) + goto out_unlock; + + /* this is only a lookup, keep the found region + * unallocated + */ + bitmap_release_region(t->ftid_bmap, ftid, 1); + } else { + ftid = bitmap_find_free_region(t->ftid_bmap, + t->nftids, 2); + if (ftid < 0) + goto out_unlock; - /* this is only a lookup, keep the found region unallocated */ - bitmap_release_region(t->ftid_bmap, ftid, 2); + bitmap_release_region(t->ftid_bmap, ftid, 2); + } } out_unlock: spin_unlock_bh(&t->ftid_lock); return ftid; } -static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family) +static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family, + unsigned int chip_ver) { spin_lock_bh(&t->ftid_lock); @@ -460,22 +473,31 @@ static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family) return -EBUSY; } - if (family == PF_INET) + if (family == PF_INET) { __set_bit(fidx, t->ftid_bmap); - else - bitmap_allocate_region(t->ftid_bmap, fidx, 2); + } else { + if (chip_ver < CHELSIO_T6) + bitmap_allocate_region(t->ftid_bmap, fidx, 2); + else + bitmap_allocate_region(t->ftid_bmap, fidx, 1); + } spin_unlock_bh(&t->ftid_lock); return 0; } -static void cxgb4_clear_ftid(struct tid_info *t, int fidx, int family) +static void cxgb4_clear_ftid(struct tid_info *t, int fidx, int family, + unsigned int chip_ver) { spin_lock_bh(&t->ftid_lock); - if (family == PF_INET) + if (family == PF_INET) { __clear_bit(fidx, t->ftid_bmap); - else - bitmap_release_region(t->ftid_bmap, fidx, 2); + } else { + if (chip_ver < CHELSIO_T6) + bitmap_release_region(t->ftid_bmap, fidx, 2); + else + bitmap_release_region(t->ftid_bmap, fidx, 1); + } spin_unlock_bh(&t->ftid_lock); } @@ -1249,23 +1271,42 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id, } } } else { /* IPv6 */ - /* Ensure that the IPv6 filter is aligned on a - * multiple of 4 boundary. - */ - if (filter_id & 0x3) { - dev_err(adapter->pdev_dev, - "Invalid location. IPv6 must be aligned on a 4-slot boundary\n"); - return -EINVAL; - } + if (chip_ver < CHELSIO_T6) { + /* Ensure that the IPv6 filter is aligned on a + * multiple of 4 boundary. + */ + if (filter_id & 0x3) { + dev_err(adapter->pdev_dev, + "Invalid location. IPv6 must be aligned on a 4-slot boundary\n"); + return -EINVAL; + } - /* Check all except the base overlapping IPv4 filter slots. */ - for (fidx = filter_id + 1; fidx < filter_id + 4; fidx++) { + /* Check all except the base overlapping IPv4 filter + * slots. + */ + for (fidx = filter_id + 1; fidx < filter_id + 4; + fidx++) { + f = &adapter->tids.ftid_tab[fidx]; + if (f->valid) { + dev_err(adapter->pdev_dev, + "Invalid location. IPv6 requires 4 slots and an IPv4 filter exists at %u\n", + fidx); + return -EBUSY; + } + } + } else { + /* For T6, CLIP being enabled, IPv6 filter would occupy + * 2 entries. + */ + if (filter_id & 0x1) + return -EINVAL; + /* Check overlapping IPv4 filter slot */ + fidx = filter_id + 1; f = &adapter->tids.ftid_tab[fidx]; if (f->valid) { - dev_err(adapter->pdev_dev, - "Invalid location. IPv6 requires 4 slots and an IPv4 filter exists at %u\n", - fidx); - return -EINVAL; + pr_err("%s: IPv6 filter requires 2 indices. IPv4 filter already present at %d. Please remove IPv4 filter first.\n", + __func__, fidx); + return -EBUSY; } } } @@ -1279,16 +1320,18 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id, fidx = filter_id + adapter->tids.ftid_base; ret = cxgb4_set_ftid(&adapter->tids, filter_id, - fs->type ? PF_INET6 : PF_INET); + fs->type ? PF_INET6 : PF_INET, + chip_ver); if (ret) return ret; - /* Check to make sure the filter requested is writable ... */ + /* Check t make sure the filter requested is writable ... */ ret = writable_filter(f); if (ret) { /* Clear the bits we have set above */ cxgb4_clear_ftid(&adapter->tids, filter_id, - fs->type ? PF_INET6 : PF_INET); + fs->type ? PF_INET6 : PF_INET, + chip_ver); return ret; } @@ -1303,7 +1346,8 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id, IPV6_ADDR_ANY) { ret = cxgb4_clip_get(dev, (const u32 *)&fs->val.lip, 1); if (ret) { - cxgb4_clear_ftid(&adapter->tids, filter_id, PF_INET6); + cxgb4_clear_ftid(&adapter->tids, filter_id, PF_INET6, + chip_ver); return ret; } } @@ -1333,7 +1377,8 @@ int __cxgb4_set_filter(struct net_device *dev, int filter_id, ret = set_filter_wr(adapter, filter_id); if (ret) { cxgb4_clear_ftid(&adapter->tids, filter_id, - fs->type ? PF_INET6 : PF_INET); + fs->type ? PF_INET6 : PF_INET, + chip_ver); clear_filter(adapter, f); } @@ -1411,6 +1456,7 @@ int __cxgb4_del_filter(struct net_device *dev, int filter_id, struct filter_ctx *ctx) { struct adapter *adapter = netdev2adap(dev); + unsigned int chip_ver = CHELSIO_CHIP_VERSION(adapter->params.chip); struct filter_entry *f; unsigned int max_fidx; int ret; @@ -1436,7 +1482,8 @@ int __cxgb4_del_filter(struct net_device *dev, int filter_id, if (f->valid) { f->ctx = ctx; cxgb4_clear_ftid(&adapter->tids, filter_id, - f->fs.type ? PF_INET6 : PF_INET); + f->fs.type ? PF_INET6 : PF_INET, + chip_ver); return del_filter_wr(adapter, filter_id); }