From patchwork Fri Mar 8 14:18:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 13586880 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 106F75D75D; Fri, 8 Mar 2024 14:19:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.20 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709907559; cv=none; b=u1erB2OdYi1/5ni+alfZx9jnfDcZOfch4oWKL5NlCIcszS2OzYlt94B/CJq+xim0hjq6ao/8XUm7n+IF15r0rvdaiOOMkF7QbBjchUZlM/3dyAUoxM9X65N8zlP+1jdeoTmyblFS7JytJVA4S4scqtR3lSFCPULPq7hD3gdsNwY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709907559; c=relaxed/simple; bh=zVEgMieKOqlQ10EzIrZ/nTBJY74dbSjTG4wpdzvMuBc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I0S5+n+EYEUUnm8ZrLFHT6KZFDpH/0p/Y0c5tC2zNgB0fCo881LbE0vBAlf7swyZ1StD2hnMCBq/mmY1LqD/UNRJI3jXwqEEY6adFkm1Weq4OQ+mW2rJDnNN2Psr6UrWwJC6kuDMXqhzlSfNHFO9O0ajDkCJzwnue7IQ+FIncqM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=m91QmzAW; arc=none smtp.client-ip=198.175.65.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="m91QmzAW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709907557; x=1741443557; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=zVEgMieKOqlQ10EzIrZ/nTBJY74dbSjTG4wpdzvMuBc=; b=m91QmzAW522f5/gFv9Q3mswRjj4eEJieOgO8k5InyL5ALSTVqpaRcXUK wAYrbhthgoS+NHw3zW27lxM3sL67BZYhwMoEYlYIoe3VdiFNcjhEHkug+ 9Mw61b/EmjvGWuRdL/GJzWCx/41B4phEXwCJcRKxZGBuYaIcbKunb3xuN 1Pq124AEOKR6HIc/dKbSUyxyfJvWpbqUgj7GT9kr8B271eK543RHDs6kS mOyQu495WobABjHiWFkfR490WhQeJ+zy1AVzbarufmlwgJ3WcjYHodCEL 8wVYg8iP6UEX/ZTaYjf8D5hdfsyM38KY4F5DpXWSLcbwtPM6A9R6EI9lI g==; X-IronPort-AV: E=McAfee;i="6600,9927,11006"; a="4504661" X-IronPort-AV: E=Sophos;i="6.07,109,1708416000"; d="scan'208";a="4504661" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2024 06:19:17 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,109,1708416000"; d="scan'208";a="15177295" Received: from newjersey.igk.intel.com ([10.102.20.203]) by orviesa005.jf.intel.com with ESMTP; 08 Mar 2024 06:19:13 -0800 From: Alexander Lobakin To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Alexander Lobakin , Alexander Duyck , Yunsheng Lin , David Christensen , Jesper Dangaard Brouer , Ilias Apalodimas , Paul Menzel , nex.sw.ncis.osdt.itp.upstreaming@intel.com, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v8 7/8] iavf: pack iavf_ring more efficiently Date: Fri, 8 Mar 2024 15:18:32 +0100 Message-ID: <20240308141833.2966600-8-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240308141833.2966600-1-aleksander.lobakin@intel.com> References: <20240308141833.2966600-1-aleksander.lobakin@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Before replacing the Rx buffer management with libie, clean up &iavf_ring a bit. There are several fields not used anywhere in the code -- simply remove them. Move ::tail up to remove a hole. Replace ::arm_wb boolean with 1-bit flag in ::flags to free 1 more byte. Finally, move ::prev_pkt_ctr out of &iavf_tx_queue_stats -- it doesn't belong there (used for Tx stall detection). Place it next to the stats on the ring itself to fill the 4-byte slot. The result: no holes and all the hot fields fit into the first 64-byte cacheline. Signed-off-by: Alexander Lobakin --- drivers/net/ethernet/intel/iavf/iavf_txrx.h | 22 +++------------------ drivers/net/ethernet/intel/iavf/iavf_txrx.c | 12 +++++------ 2 files changed, 9 insertions(+), 25 deletions(-) diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.h b/drivers/net/ethernet/intel/iavf/iavf_txrx.h index e01777531635..ed559fa6f214 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_txrx.h +++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.h @@ -227,7 +227,6 @@ struct iavf_tx_queue_stats { u64 tx_done_old; u64 tx_linearize; u64 tx_force_wb; - int prev_pkt_ctr; u64 tx_lost_interrupt; }; @@ -237,12 +236,6 @@ struct iavf_rx_queue_stats { u64 alloc_buff_failed; }; -enum iavf_ring_state_t { - __IAVF_TX_FDIR_INIT_DONE, - __IAVF_TX_XPS_INIT_DONE, - __IAVF_RING_STATE_NBITS /* must be last */ -}; - /* some useful defines for virtchannel interface, which * is the only remaining user of header split */ @@ -264,10 +257,8 @@ struct iavf_ring { struct iavf_tx_buffer *tx_bi; struct iavf_rx_buffer *rx_bi; }; - DECLARE_BITMAP(state, __IAVF_RING_STATE_NBITS); - u16 queue_index; /* Queue number of ring */ - u8 dcb_tc; /* Traffic class of ring */ u8 __iomem *tail; + u16 queue_index; /* Queue number of ring */ /* high bit set means dynamic, use accessors routines to read/write. * hardware only supports 2us resolution for the ITR registers. @@ -277,22 +268,14 @@ struct iavf_ring { u16 itr_setting; u16 count; /* Number of descriptors */ - u16 reg_idx; /* HW register index of the ring */ /* used in interrupt processing */ u16 next_to_use; u16 next_to_clean; - u8 atr_sample_rate; - u8 atr_count; - - bool ring_active; /* is ring online or not */ - bool arm_wb; /* do something to arm write back */ - u8 packet_stride; - u16 flags; #define IAVF_TXR_FLAGS_WB_ON_ITR BIT(0) -/* BIT(1) is free, was IAVF_RXR_FLAGS_BUILD_SKB_ENABLED */ +#define IAVF_TXR_FLAGS_ARM_WB BIT(1) /* BIT(2) is free */ #define IAVF_TXRX_FLAGS_VLAN_TAG_LOC_L2TAG1 BIT(3) #define IAVF_TXR_FLAGS_VLAN_TAG_LOC_L2TAG2 BIT(4) @@ -306,6 +289,7 @@ struct iavf_ring { struct iavf_rx_queue_stats rx_stats; }; + int prev_pkt_ctr; /* For Tx stall detection */ unsigned int size; /* length of descriptor ring in bytes */ dma_addr_t dma; /* physical address of ring */ diff --git a/drivers/net/ethernet/intel/iavf/iavf_txrx.c b/drivers/net/ethernet/intel/iavf/iavf_txrx.c index a14f7f211150..1a27fa613f6d 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_txrx.c +++ b/drivers/net/ethernet/intel/iavf/iavf_txrx.c @@ -185,7 +185,7 @@ void iavf_detect_recover_hung(struct iavf_vsi *vsi) * pending work. */ packets = tx_ring->stats.packets & INT_MAX; - if (tx_ring->tx_stats.prev_pkt_ctr == packets) { + if (tx_ring->prev_pkt_ctr == packets) { iavf_force_wb(vsi, tx_ring->q_vector); continue; } @@ -194,7 +194,7 @@ void iavf_detect_recover_hung(struct iavf_vsi *vsi) * to iavf_get_tx_pending() */ smp_rmb(); - tx_ring->tx_stats.prev_pkt_ctr = + tx_ring->prev_pkt_ctr = iavf_get_tx_pending(tx_ring, true) ? packets : -1; } } @@ -320,7 +320,7 @@ static bool iavf_clean_tx_irq(struct iavf_vsi *vsi, ((j / WB_STRIDE) == 0) && (j > 0) && !test_bit(__IAVF_VSI_DOWN, vsi->state) && (IAVF_DESC_UNUSED(tx_ring) != tx_ring->count)) - tx_ring->arm_wb = true; + tx_ring->flags |= IAVF_TXR_FLAGS_ARM_WB; } /* notify netdev of completed buffers */ @@ -675,7 +675,7 @@ int iavf_setup_tx_descriptors(struct iavf_ring *tx_ring) tx_ring->next_to_use = 0; tx_ring->next_to_clean = 0; - tx_ring->tx_stats.prev_pkt_ctr = -1; + tx_ring->prev_pkt_ctr = -1; return 0; err: @@ -1491,8 +1491,8 @@ int iavf_napi_poll(struct napi_struct *napi, int budget) clean_complete = false; continue; } - arm_wb |= ring->arm_wb; - ring->arm_wb = false; + arm_wb |= !!(ring->flags & IAVF_TXR_FLAGS_ARM_WB); + ring->flags &= ~IAVF_TXR_FLAGS_ARM_WB; } /* Handle case where we are called by netpoll with a budget of 0 */