From 2e6d218c1ec6fb9cd70693b78134cbc35ae0b5a9 Mon Sep 17 00:00:00 2001 From: Jedrzej Jagielski Date: Mon, 21 Jun 2021 08:37:31 +0000 Subject: [PATCH] i40e: Fix creation of first queue by omitting it if is not power of two Reject TCs creation with proper message if the first queue assignment is not equal to the power of two. The first queue number was checked too late in the second queue iteration, if second queue was configured at all. Now if first queue value is not a power of two, then trying to create qdisc will be rejected. Fixes: 8f88b3034db3 ("i40e: Add infrastructure for queue channel support") Signed-off-by: Grzegorz Szczurek Signed-off-by: Jedrzej Jagielski Tested-by: Tony Brelinski Signed-off-by: Tony Nguyen --- drivers/net/ethernet/intel/i40e/i40e_main.c | 59 +++++++-------------- 1 file changed, 19 insertions(+), 40 deletions(-) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index 37386a270db5..0a98fab6d019 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -5786,24 +5786,6 @@ static void i40e_remove_queue_channels(struct i40e_vsi *vsi) INIT_LIST_HEAD(&vsi->ch_list); } -/** - * i40e_is_any_channel - channel exist or not - * @vsi: ptr to VSI to which channels are associated with - * - * Returns true or false if channel(s) exist for associated VSI or not - **/ -static bool i40e_is_any_channel(struct i40e_vsi *vsi) -{ - struct i40e_channel *ch, *ch_tmp; - - list_for_each_entry_safe(ch, ch_tmp, &vsi->ch_list, list) { - if (ch->initialized) - return true; - } - - return false; -} - /** * i40e_get_max_queues_for_channel * @vsi: ptr to VSI to which channels are associated with @@ -6310,26 +6292,15 @@ int i40e_create_queue_channel(struct i40e_vsi *vsi, /* By default we are in VEPA mode, if this is the first VF/VMDq * VSI to be added switch to VEB mode. */ - if ((!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) || - (!i40e_is_any_channel(vsi))) { - if (!is_power_of_2(vsi->tc_config.tc_info[0].qcount)) { - dev_dbg(&pf->pdev->dev, - "Failed to create channel. Override queues (%u) not power of 2\n", - vsi->tc_config.tc_info[0].qcount); - return -EINVAL; - } - if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) { - pf->flags |= I40E_FLAG_VEB_MODE_ENABLED; + if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) { + pf->flags |= I40E_FLAG_VEB_MODE_ENABLED; - if (vsi->type == I40E_VSI_MAIN) { - if (pf->flags & I40E_FLAG_TC_MQPRIO) - i40e_do_reset(pf, I40E_PF_RESET_FLAG, - true); - else - i40e_do_reset_safe(pf, - I40E_PF_RESET_FLAG); - } + if (vsi->type == I40E_VSI_MAIN) { + if (pf->flags & I40E_FLAG_TC_MQPRIO) + i40e_do_reset(pf, I40E_PF_RESET_FLAG, true); + else + i40e_do_reset_safe(pf, I40E_PF_RESET_FLAG); } /* now onwards for main VSI, number of queues will be value * of TC0's queue count @@ -7982,12 +7953,20 @@ config_tc: vsi->seid); need_reset = true; goto exit; - } else { - dev_info(&vsi->back->pdev->dev, - "Setup channel (id:%u) utilizing num_queues %d\n", - vsi->seid, vsi->tc_config.tc_info[0].qcount); + } else if (enabled_tc && + (!is_power_of_2(vsi->tc_config.tc_info[0].qcount))) { + netdev_info(netdev, + "Failed to create channel. Override queues (%u) not power of 2\n", + vsi->tc_config.tc_info[0].qcount); + ret = -EINVAL; + need_reset = true; + goto exit; } + dev_info(&vsi->back->pdev->dev, + "Setup channel (id:%u) utilizing num_queues %d\n", + vsi->seid, vsi->tc_config.tc_info[0].qcount); + if (pf->flags & I40E_FLAG_TC_MQPRIO) { if (vsi->mqprio_qopt.max_rate[0]) { u64 max_tx_rate = vsi->mqprio_qopt.max_rate[0]; -- 2.34.1