From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Cree Subject: [PATCH net-next 1/4] sfc: fixes to filter restore handling Date: Fri, 27 Jan 2017 15:02:11 +0000 Message-ID: References: <9baa375c-b3b1-f640-04fb-e234c85a4e93@solarflare.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: To: , Return-path: Received: from nbfkord-smmo03.seg.att.com ([209.65.160.84]:18182 "EHLO nbfkord-smmo03.seg.att.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755047AbdA0PKM (ORCPT ); Fri, 27 Jan 2017 10:10:12 -0500 In-Reply-To: <9baa375c-b3b1-f640-04fb-e234c85a4e93@solarflare.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Jon Cooper If the NIC is switched from full-featured to low-latency, encapsulated filters are no longer available, and this causes errors. This patch removes those filters from the filter table on restore. Also, if filters which are removed by the above, or which we fail to insert when restoring filters, were UC, MC or broadcast default filters, invalidate the corresponding vlan->default_filters entry. Signed-off-by: Edward Cree --- drivers/net/ethernet/sfc/ef10.c | 42 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c index 7c53da2..b64b47b 100644 --- a/drivers/net/ethernet/sfc/ef10.c +++ b/drivers/net/ethernet/sfc/ef10.c @@ -4557,9 +4557,12 @@ static void efx_ef10_filter_table_restore(struct efx_nic *efx) { struct efx_ef10_filter_table *table = efx->filter_state; struct efx_ef10_nic_data *nic_data = efx->nic_data; + unsigned int invalid_filters = 0, failed = 0; + struct efx_ef10_filter_vlan *vlan; struct efx_filter_spec *spec; unsigned int filter_idx; - bool failed = false; + u32 mcdi_flags; + int match_pri; int rc; WARN_ON(!rwsem_is_locked(&efx->filter_sem)); @@ -4577,6 +4580,20 @@ static void efx_ef10_filter_table_restore(struct efx_nic *efx) if (!spec) continue; + mcdi_flags = efx_ef10_filter_mcdi_flags_from_spec(spec); + match_pri = 0; + while (match_pri < table->rx_match_count && + table->rx_match_mcdi_flags[match_pri] != mcdi_flags) + ++match_pri; + if (match_pri >= table->rx_match_count) { + invalid_filters++; + goto not_restored; + } + if (spec->rss_context != EFX_FILTER_RSS_CONTEXT_DEFAULT && + spec->rss_context != nic_data->rx_rss_context) + netif_warn(efx, drv, efx->net_dev, + "Warning: unable to restore a filter with specific RSS context.\n"); + table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_BUSY; spin_unlock_bh(&efx->filter_lock); @@ -4584,10 +4601,19 @@ static void efx_ef10_filter_table_restore(struct efx_nic *efx) &table->entry[filter_idx].handle, false); if (rc) - failed = true; - + failed++; spin_lock_bh(&efx->filter_lock); + if (rc) { +not_restored: + list_for_each_entry(vlan, &table->vlan_list, list) { + if (vlan->ucdef == filter_idx) + vlan->ucdef = EFX_EF10_FILTER_ID_INVALID; + if (vlan->mcdef == filter_idx) + vlan->mcdef = EFX_EF10_FILTER_ID_INVALID; + if (vlan->bcast == filter_idx) + vlan->bcast = EFX_EF10_FILTER_ID_INVALID; + } kfree(spec); efx_ef10_filter_set_entry(table, filter_idx, NULL, 0); } else { @@ -4598,9 +4624,17 @@ static void efx_ef10_filter_table_restore(struct efx_nic *efx) spin_unlock_bh(&efx->filter_lock); + /* This can happen validly if the MC's capabilities have changed, so + * is not an error. + */ + if (invalid_filters) + netif_dbg(efx, drv, efx->net_dev, + "Did not restore %u filters that are now unsupported.\n", + invalid_filters); + if (failed) netif_err(efx, hw, efx->net_dev, - "unable to restore all filters\n"); + "unable to restore %u filters\n", failed); else nic_data->must_restore_filters = false; }