2862 lines
76 KiB
C
2862 lines
76 KiB
C
/*
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* Copyright (C) 2015 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/*
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* nfp_net_common.c
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* Netronome network device driver: Common functions between PF and VF
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* Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
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* Jason McMullan <jason.mcmullan@netronome.com>
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* Rolf Neugebauer <rolf.neugebauer@netronome.com>
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* Brad Petrus <brad.petrus@netronome.com>
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* Chris Telfer <chris.telfer@netronome.com>
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*/
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/interrupt.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/pci.h>
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#include <linux/pci_regs.h>
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#include <linux/msi.h>
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#include <linux/ethtool.h>
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#include <linux/log2.h>
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#include <linux/if_vlan.h>
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#include <linux/random.h>
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#include <linux/ktime.h>
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#include <net/vxlan.h>
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#include "nfp_net_ctrl.h"
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#include "nfp_net.h"
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/**
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* nfp_net_get_fw_version() - Read and parse the FW version
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* @fw_ver: Output fw_version structure to read to
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* @ctrl_bar: Mapped address of the control BAR
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*/
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void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver,
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void __iomem *ctrl_bar)
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{
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u32 reg;
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reg = readl(ctrl_bar + NFP_NET_CFG_VERSION);
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put_unaligned_le32(reg, fw_ver);
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}
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/* Firmware reconfig
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*
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* Firmware reconfig may take a while so we have two versions of it -
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* synchronous and asynchronous (posted). All synchronous callers are holding
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* RTNL so we don't have to worry about serializing them.
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*/
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static void nfp_net_reconfig_start(struct nfp_net *nn, u32 update)
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{
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nn_writel(nn, NFP_NET_CFG_UPDATE, update);
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/* ensure update is written before pinging HW */
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nn_pci_flush(nn);
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nfp_qcp_wr_ptr_add(nn->qcp_cfg, 1);
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}
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/* Pass 0 as update to run posted reconfigs. */
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static void nfp_net_reconfig_start_async(struct nfp_net *nn, u32 update)
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{
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update |= nn->reconfig_posted;
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nn->reconfig_posted = 0;
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nfp_net_reconfig_start(nn, update);
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nn->reconfig_timer_active = true;
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mod_timer(&nn->reconfig_timer, jiffies + NFP_NET_POLL_TIMEOUT * HZ);
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}
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static bool nfp_net_reconfig_check_done(struct nfp_net *nn, bool last_check)
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{
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u32 reg;
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reg = nn_readl(nn, NFP_NET_CFG_UPDATE);
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if (reg == 0)
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return true;
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if (reg & NFP_NET_CFG_UPDATE_ERR) {
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nn_err(nn, "Reconfig error: 0x%08x\n", reg);
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return true;
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} else if (last_check) {
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nn_err(nn, "Reconfig timeout: 0x%08x\n", reg);
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return true;
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}
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return false;
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}
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static int nfp_net_reconfig_wait(struct nfp_net *nn, unsigned long deadline)
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{
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bool timed_out = false;
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/* Poll update field, waiting for NFP to ack the config */
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while (!nfp_net_reconfig_check_done(nn, timed_out)) {
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msleep(1);
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timed_out = time_is_before_eq_jiffies(deadline);
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}
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if (nn_readl(nn, NFP_NET_CFG_UPDATE) & NFP_NET_CFG_UPDATE_ERR)
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return -EIO;
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return timed_out ? -EIO : 0;
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}
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static void nfp_net_reconfig_timer(unsigned long data)
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{
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struct nfp_net *nn = (void *)data;
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spin_lock_bh(&nn->reconfig_lock);
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nn->reconfig_timer_active = false;
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/* If sync caller is present it will take over from us */
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if (nn->reconfig_sync_present)
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goto done;
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/* Read reconfig status and report errors */
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nfp_net_reconfig_check_done(nn, true);
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if (nn->reconfig_posted)
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nfp_net_reconfig_start_async(nn, 0);
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done:
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spin_unlock_bh(&nn->reconfig_lock);
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}
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/**
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* nfp_net_reconfig_post() - Post async reconfig request
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* @nn: NFP Net device to reconfigure
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* @update: The value for the update field in the BAR config
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*
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* Record FW reconfiguration request. Reconfiguration will be kicked off
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* whenever reconfiguration machinery is idle. Multiple requests can be
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* merged together!
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*/
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static void nfp_net_reconfig_post(struct nfp_net *nn, u32 update)
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{
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spin_lock_bh(&nn->reconfig_lock);
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/* Sync caller will kick off async reconf when it's done, just post */
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if (nn->reconfig_sync_present) {
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nn->reconfig_posted |= update;
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goto done;
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}
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/* Opportunistically check if the previous command is done */
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if (!nn->reconfig_timer_active ||
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nfp_net_reconfig_check_done(nn, false))
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nfp_net_reconfig_start_async(nn, update);
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else
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nn->reconfig_posted |= update;
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done:
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spin_unlock_bh(&nn->reconfig_lock);
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}
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/**
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* nfp_net_reconfig() - Reconfigure the firmware
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* @nn: NFP Net device to reconfigure
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* @update: The value for the update field in the BAR config
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*
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* Write the update word to the BAR and ping the reconfig queue. The
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* poll until the firmware has acknowledged the update by zeroing the
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* update word.
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*
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* Return: Negative errno on error, 0 on success
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*/
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int nfp_net_reconfig(struct nfp_net *nn, u32 update)
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{
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bool cancelled_timer = false;
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u32 pre_posted_requests;
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int ret;
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spin_lock_bh(&nn->reconfig_lock);
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nn->reconfig_sync_present = true;
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if (nn->reconfig_timer_active) {
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del_timer(&nn->reconfig_timer);
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nn->reconfig_timer_active = false;
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cancelled_timer = true;
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}
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pre_posted_requests = nn->reconfig_posted;
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nn->reconfig_posted = 0;
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spin_unlock_bh(&nn->reconfig_lock);
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if (cancelled_timer)
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nfp_net_reconfig_wait(nn, nn->reconfig_timer.expires);
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/* Run the posted reconfigs which were issued before we started */
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if (pre_posted_requests) {
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nfp_net_reconfig_start(nn, pre_posted_requests);
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nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
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}
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nfp_net_reconfig_start(nn, update);
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ret = nfp_net_reconfig_wait(nn, jiffies + HZ * NFP_NET_POLL_TIMEOUT);
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spin_lock_bh(&nn->reconfig_lock);
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if (nn->reconfig_posted)
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nfp_net_reconfig_start_async(nn, 0);
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nn->reconfig_sync_present = false;
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spin_unlock_bh(&nn->reconfig_lock);
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return ret;
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}
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/* Interrupt configuration and handling
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*/
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/**
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* nfp_net_irq_unmask_msix() - Unmask MSI-X after automasking
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* @nn: NFP Network structure
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* @entry_nr: MSI-X table entry
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*
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* Clear the MSI-X table mask bit for the given entry bypassing Linux irq
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* handling subsystem. Use *only* to reenable automasked vectors.
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*/
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static void nfp_net_irq_unmask_msix(struct nfp_net *nn, unsigned int entry_nr)
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{
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struct list_head *msi_head = &nn->pdev->dev.msi_list;
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struct msi_desc *entry;
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u32 off;
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/* All MSI-Xs have the same mask_base */
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entry = list_first_entry(msi_head, struct msi_desc, list);
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off = (PCI_MSIX_ENTRY_SIZE * entry_nr) +
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PCI_MSIX_ENTRY_VECTOR_CTRL;
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writel(0, entry->mask_base + off);
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readl(entry->mask_base);
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}
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/**
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* nfp_net_irq_unmask() - Unmask automasked interrupt
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* @nn: NFP Network structure
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* @entry_nr: MSI-X table entry
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*
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* If MSI-X auto-masking is enabled clear the mask bit, otherwise
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* clear the ICR for the entry.
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*/
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static void nfp_net_irq_unmask(struct nfp_net *nn, unsigned int entry_nr)
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{
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if (nn->ctrl & NFP_NET_CFG_CTRL_MSIXAUTO) {
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nfp_net_irq_unmask_msix(nn, entry_nr);
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return;
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}
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nn_writeb(nn, NFP_NET_CFG_ICR(entry_nr), NFP_NET_CFG_ICR_UNMASKED);
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nn_pci_flush(nn);
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}
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/**
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* nfp_net_msix_alloc() - Try to allocate MSI-X irqs
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* @nn: NFP Network structure
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* @nr_vecs: Number of MSI-X vectors to allocate
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*
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* For MSI-X we want at least NFP_NET_NON_Q_VECTORS + 1 vectors.
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*
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* Return: Number of MSI-X vectors obtained or 0 on error.
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*/
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static int nfp_net_msix_alloc(struct nfp_net *nn, int nr_vecs)
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{
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struct pci_dev *pdev = nn->pdev;
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int nvecs;
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int i;
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for (i = 0; i < nr_vecs; i++)
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nn->irq_entries[i].entry = i;
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nvecs = pci_enable_msix_range(pdev, nn->irq_entries,
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NFP_NET_NON_Q_VECTORS + 1, nr_vecs);
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if (nvecs < 0) {
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nn_warn(nn, "Failed to enable MSI-X. Wanted %d-%d (err=%d)\n",
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NFP_NET_NON_Q_VECTORS + 1, nr_vecs, nvecs);
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return 0;
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}
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return nvecs;
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}
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/**
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* nfp_net_irqs_wanted() - Work out how many interrupt vectors we want
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* @nn: NFP Network structure
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*
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* We want a vector per CPU (or ring), whatever is smaller plus
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* NFP_NET_NON_Q_VECTORS for LSC etc.
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*
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* Return: Number of interrupts wanted
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*/
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static int nfp_net_irqs_wanted(struct nfp_net *nn)
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{
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int ncpus;
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int vecs;
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ncpus = num_online_cpus();
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vecs = max_t(int, nn->num_tx_rings, nn->num_rx_rings);
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vecs = min_t(int, vecs, ncpus);
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return vecs + NFP_NET_NON_Q_VECTORS;
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}
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/**
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* nfp_net_irqs_alloc() - allocates MSI-X irqs
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* @nn: NFP Network structure
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*
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* Return: Number of irqs obtained or 0 on error.
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*/
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int nfp_net_irqs_alloc(struct nfp_net *nn)
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{
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int wanted_irqs;
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wanted_irqs = nfp_net_irqs_wanted(nn);
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nn->num_irqs = nfp_net_msix_alloc(nn, wanted_irqs);
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if (nn->num_irqs == 0) {
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nn_err(nn, "Failed to allocate MSI-X IRQs\n");
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return 0;
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}
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nn->num_r_vecs = nn->num_irqs - NFP_NET_NON_Q_VECTORS;
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if (nn->num_irqs < wanted_irqs)
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nn_warn(nn, "Unable to allocate %d vectors. Got %d instead\n",
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wanted_irqs, nn->num_irqs);
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return nn->num_irqs;
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}
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/**
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* nfp_net_irqs_disable() - Disable interrupts
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* @nn: NFP Network structure
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*
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* Undoes what @nfp_net_irqs_alloc() does.
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*/
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void nfp_net_irqs_disable(struct nfp_net *nn)
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{
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pci_disable_msix(nn->pdev);
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}
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/**
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* nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
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* @irq: Interrupt
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* @data: Opaque data structure
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*
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* Return: Indicate if the interrupt has been handled.
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*/
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static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
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{
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struct nfp_net_r_vector *r_vec = data;
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napi_schedule_irqoff(&r_vec->napi);
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/* The FW auto-masks any interrupt, either via the MASK bit in
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* the MSI-X table or via the per entry ICR field. So there
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* is no need to disable interrupts here.
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*/
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return IRQ_HANDLED;
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}
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/**
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* nfp_net_read_link_status() - Reread link status from control BAR
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* @nn: NFP Network structure
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*/
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static void nfp_net_read_link_status(struct nfp_net *nn)
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{
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unsigned long flags;
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bool link_up;
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u32 sts;
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spin_lock_irqsave(&nn->link_status_lock, flags);
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sts = nn_readl(nn, NFP_NET_CFG_STS);
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link_up = !!(sts & NFP_NET_CFG_STS_LINK);
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if (nn->link_up == link_up)
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goto out;
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nn->link_up = link_up;
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if (nn->link_up) {
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netif_carrier_on(nn->netdev);
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netdev_info(nn->netdev, "NIC Link is Up\n");
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} else {
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netif_carrier_off(nn->netdev);
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netdev_info(nn->netdev, "NIC Link is Down\n");
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}
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out:
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spin_unlock_irqrestore(&nn->link_status_lock, flags);
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}
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/**
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* nfp_net_irq_lsc() - Interrupt service routine for link state changes
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* @irq: Interrupt
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* @data: Opaque data structure
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*
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* Return: Indicate if the interrupt has been handled.
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*/
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static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
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{
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struct nfp_net *nn = data;
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nfp_net_read_link_status(nn);
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nfp_net_irq_unmask(nn, NFP_NET_IRQ_LSC_IDX);
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return IRQ_HANDLED;
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}
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|
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/**
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* nfp_net_irq_exn() - Interrupt service routine for exceptions
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* @irq: Interrupt
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* @data: Opaque data structure
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*
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* Return: Indicate if the interrupt has been handled.
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*/
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static irqreturn_t nfp_net_irq_exn(int irq, void *data)
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{
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struct nfp_net *nn = data;
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nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
|
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/* XXX TO BE IMPLEMENTED */
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return IRQ_HANDLED;
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}
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|
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/**
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* nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring
|
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* @tx_ring: TX ring structure
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* @r_vec: IRQ vector servicing this ring
|
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* @idx: Ring index
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*/
|
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static void
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nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring,
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struct nfp_net_r_vector *r_vec, unsigned int idx)
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{
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struct nfp_net *nn = r_vec->nfp_net;
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|
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tx_ring->idx = idx;
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tx_ring->r_vec = r_vec;
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|
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tx_ring->qcidx = tx_ring->idx * nn->stride_tx;
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tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx);
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}
|
|
|
|
/**
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* nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring
|
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* @rx_ring: RX ring structure
|
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* @r_vec: IRQ vector servicing this ring
|
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* @idx: Ring index
|
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*/
|
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static void
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nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring,
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struct nfp_net_r_vector *r_vec, unsigned int idx)
|
|
{
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struct nfp_net *nn = r_vec->nfp_net;
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|
|
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rx_ring->idx = idx;
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rx_ring->r_vec = r_vec;
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|
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rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx;
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rx_ring->rx_qcidx = rx_ring->fl_qcidx + (nn->stride_rx - 1);
|
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|
|
rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx);
|
|
rx_ring->qcp_rx = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->rx_qcidx);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_irqs_assign() - Assign IRQs and setup rvecs.
|
|
* @netdev: netdev structure
|
|
*/
|
|
static void nfp_net_irqs_assign(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
struct nfp_net_r_vector *r_vec;
|
|
int r;
|
|
|
|
/* Assumes nn->num_tx_rings == nn->num_rx_rings */
|
|
if (nn->num_tx_rings > nn->num_r_vecs) {
|
|
nn_warn(nn, "More rings (%d) than vectors (%d).\n",
|
|
nn->num_tx_rings, nn->num_r_vecs);
|
|
nn->num_tx_rings = nn->num_r_vecs;
|
|
nn->num_rx_rings = nn->num_r_vecs;
|
|
}
|
|
|
|
nn->lsc_handler = nfp_net_irq_lsc;
|
|
nn->exn_handler = nfp_net_irq_exn;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
r_vec = &nn->r_vecs[r];
|
|
r_vec->nfp_net = nn;
|
|
r_vec->handler = nfp_net_irq_rxtx;
|
|
r_vec->irq_idx = NFP_NET_NON_Q_VECTORS + r;
|
|
|
|
cpumask_set_cpu(r, &r_vec->affinity_mask);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_aux_irq_request() - Request an auxiliary interrupt (LSC or EXN)
|
|
* @nn: NFP Network structure
|
|
* @ctrl_offset: Control BAR offset where IRQ configuration should be written
|
|
* @format: printf-style format to construct the interrupt name
|
|
* @name: Pointer to allocated space for interrupt name
|
|
* @name_sz: Size of space for interrupt name
|
|
* @vector_idx: Index of MSI-X vector used for this interrupt
|
|
* @handler: IRQ handler to register for this interrupt
|
|
*/
|
|
static int
|
|
nfp_net_aux_irq_request(struct nfp_net *nn, u32 ctrl_offset,
|
|
const char *format, char *name, size_t name_sz,
|
|
unsigned int vector_idx, irq_handler_t handler)
|
|
{
|
|
struct msix_entry *entry;
|
|
int err;
|
|
|
|
entry = &nn->irq_entries[vector_idx];
|
|
|
|
snprintf(name, name_sz, format, netdev_name(nn->netdev));
|
|
err = request_irq(entry->vector, handler, 0, name, nn);
|
|
if (err) {
|
|
nn_err(nn, "Failed to request IRQ %d (err=%d).\n",
|
|
entry->vector, err);
|
|
return err;
|
|
}
|
|
nn_writeb(nn, ctrl_offset, vector_idx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_aux_irq_free() - Free an auxiliary interrupt (LSC or EXN)
|
|
* @nn: NFP Network structure
|
|
* @ctrl_offset: Control BAR offset where IRQ configuration should be written
|
|
* @vector_idx: Index of MSI-X vector used for this interrupt
|
|
*/
|
|
static void nfp_net_aux_irq_free(struct nfp_net *nn, u32 ctrl_offset,
|
|
unsigned int vector_idx)
|
|
{
|
|
nn_writeb(nn, ctrl_offset, 0xff);
|
|
free_irq(nn->irq_entries[vector_idx].vector, nn);
|
|
}
|
|
|
|
/* Transmit
|
|
*
|
|
* One queue controller peripheral queue is used for transmit. The
|
|
* driver en-queues packets for transmit by advancing the write
|
|
* pointer. The device indicates that packets have transmitted by
|
|
* advancing the read pointer. The driver maintains a local copy of
|
|
* the read and write pointer in @struct nfp_net_tx_ring. The driver
|
|
* keeps @wr_p in sync with the queue controller write pointer and can
|
|
* determine how many packets have been transmitted by comparing its
|
|
* copy of the read pointer @rd_p with the read pointer maintained by
|
|
* the queue controller peripheral.
|
|
*/
|
|
|
|
/**
|
|
* nfp_net_tx_full() - Check if the TX ring is full
|
|
* @tx_ring: TX ring to check
|
|
* @dcnt: Number of descriptors that need to be enqueued (must be >= 1)
|
|
*
|
|
* This function checks, based on the *host copy* of read/write
|
|
* pointer if a given TX ring is full. The real TX queue may have
|
|
* some newly made available slots.
|
|
*
|
|
* Return: True if the ring is full.
|
|
*/
|
|
static inline int nfp_net_tx_full(struct nfp_net_tx_ring *tx_ring, int dcnt)
|
|
{
|
|
return (tx_ring->wr_p - tx_ring->rd_p) >= (tx_ring->cnt - dcnt);
|
|
}
|
|
|
|
/* Wrappers for deciding when to stop and restart TX queues */
|
|
static int nfp_net_tx_ring_should_wake(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
return !nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS * 4);
|
|
}
|
|
|
|
static int nfp_net_tx_ring_should_stop(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
return nfp_net_tx_full(tx_ring, MAX_SKB_FRAGS + 1);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_ring_stop() - stop tx ring
|
|
* @nd_q: netdev queue
|
|
* @tx_ring: driver tx queue structure
|
|
*
|
|
* Safely stop TX ring. Remember that while we are running .start_xmit()
|
|
* someone else may be cleaning the TX ring completions so we need to be
|
|
* extra careful here.
|
|
*/
|
|
static void nfp_net_tx_ring_stop(struct netdev_queue *nd_q,
|
|
struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
netif_tx_stop_queue(nd_q);
|
|
|
|
/* We can race with the TX completion out of NAPI so recheck */
|
|
smp_mb();
|
|
if (unlikely(nfp_net_tx_ring_should_wake(tx_ring)))
|
|
netif_tx_start_queue(nd_q);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_tso() - Set up Tx descriptor for LSO
|
|
* @nn: NFP Net device
|
|
* @r_vec: per-ring structure
|
|
* @txbuf: Pointer to driver soft TX descriptor
|
|
* @txd: Pointer to HW TX descriptor
|
|
* @skb: Pointer to SKB
|
|
*
|
|
* Set up Tx descriptor for LSO, do nothing for non-LSO skbs.
|
|
* Return error on packet header greater than maximum supported LSO header size.
|
|
*/
|
|
static void nfp_net_tx_tso(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
struct nfp_net_tx_buf *txbuf,
|
|
struct nfp_net_tx_desc *txd, struct sk_buff *skb)
|
|
{
|
|
u32 hdrlen;
|
|
u16 mss;
|
|
|
|
if (!skb_is_gso(skb))
|
|
return;
|
|
|
|
if (!skb->encapsulation)
|
|
hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
|
|
else
|
|
hdrlen = skb_inner_transport_header(skb) - skb->data +
|
|
inner_tcp_hdrlen(skb);
|
|
|
|
txbuf->pkt_cnt = skb_shinfo(skb)->gso_segs;
|
|
txbuf->real_len += hdrlen * (txbuf->pkt_cnt - 1);
|
|
|
|
mss = skb_shinfo(skb)->gso_size & PCIE_DESC_TX_MSS_MASK;
|
|
txd->l4_offset = hdrlen;
|
|
txd->mss = cpu_to_le16(mss);
|
|
txd->flags |= PCIE_DESC_TX_LSO;
|
|
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_lso++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor
|
|
* @nn: NFP Net device
|
|
* @r_vec: per-ring structure
|
|
* @txbuf: Pointer to driver soft TX descriptor
|
|
* @txd: Pointer to TX descriptor
|
|
* @skb: Pointer to SKB
|
|
*
|
|
* This function sets the TX checksum flags in the TX descriptor based
|
|
* on the configuration and the protocol of the packet to be transmitted.
|
|
*/
|
|
static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
struct nfp_net_tx_buf *txbuf,
|
|
struct nfp_net_tx_desc *txd, struct sk_buff *skb)
|
|
{
|
|
struct ipv6hdr *ipv6h;
|
|
struct iphdr *iph;
|
|
u8 l4_hdr;
|
|
|
|
if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM))
|
|
return;
|
|
|
|
if (skb->ip_summed != CHECKSUM_PARTIAL)
|
|
return;
|
|
|
|
txd->flags |= PCIE_DESC_TX_CSUM;
|
|
if (skb->encapsulation)
|
|
txd->flags |= PCIE_DESC_TX_ENCAP;
|
|
|
|
iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
|
|
ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
|
|
|
|
if (iph->version == 4) {
|
|
txd->flags |= PCIE_DESC_TX_IP4_CSUM;
|
|
l4_hdr = iph->protocol;
|
|
} else if (ipv6h->version == 6) {
|
|
l4_hdr = ipv6h->nexthdr;
|
|
} else {
|
|
nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n",
|
|
iph->version);
|
|
return;
|
|
}
|
|
|
|
switch (l4_hdr) {
|
|
case IPPROTO_TCP:
|
|
txd->flags |= PCIE_DESC_TX_TCP_CSUM;
|
|
break;
|
|
case IPPROTO_UDP:
|
|
txd->flags |= PCIE_DESC_TX_UDP_CSUM;
|
|
break;
|
|
default:
|
|
nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n",
|
|
l4_hdr);
|
|
return;
|
|
}
|
|
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
if (skb->encapsulation)
|
|
r_vec->hw_csum_tx_inner += txbuf->pkt_cnt;
|
|
else
|
|
r_vec->hw_csum_tx += txbuf->pkt_cnt;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx() - Main transmit entry point
|
|
* @skb: SKB to transmit
|
|
* @netdev: netdev structure
|
|
*
|
|
* Return: NETDEV_TX_OK on success.
|
|
*/
|
|
static int nfp_net_tx(struct sk_buff *skb, struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
const struct skb_frag_struct *frag;
|
|
struct nfp_net_r_vector *r_vec;
|
|
struct nfp_net_tx_desc *txd, txdg;
|
|
struct nfp_net_tx_buf *txbuf;
|
|
struct nfp_net_tx_ring *tx_ring;
|
|
struct netdev_queue *nd_q;
|
|
dma_addr_t dma_addr;
|
|
unsigned int fsize;
|
|
int f, nr_frags;
|
|
int wr_idx;
|
|
u16 qidx;
|
|
|
|
qidx = skb_get_queue_mapping(skb);
|
|
tx_ring = &nn->tx_rings[qidx];
|
|
r_vec = tx_ring->r_vec;
|
|
nd_q = netdev_get_tx_queue(nn->netdev, qidx);
|
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags;
|
|
|
|
if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) {
|
|
nn_warn_ratelimit(nn, "TX ring %d busy. wrp=%u rdp=%u\n",
|
|
qidx, tx_ring->wr_p, tx_ring->rd_p);
|
|
netif_tx_stop_queue(nd_q);
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_busy++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
/* Start with the head skbuf */
|
|
dma_addr = dma_map_single(&nn->pdev->dev, skb->data, skb_headlen(skb),
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&nn->pdev->dev, dma_addr))
|
|
goto err_free;
|
|
|
|
wr_idx = tx_ring->wr_p % tx_ring->cnt;
|
|
|
|
/* Stash the soft descriptor of the head then initialize it */
|
|
txbuf = &tx_ring->txbufs[wr_idx];
|
|
txbuf->skb = skb;
|
|
txbuf->dma_addr = dma_addr;
|
|
txbuf->fidx = -1;
|
|
txbuf->pkt_cnt = 1;
|
|
txbuf->real_len = skb->len;
|
|
|
|
/* Build TX descriptor */
|
|
txd = &tx_ring->txds[wr_idx];
|
|
txd->offset_eop = (nr_frags == 0) ? PCIE_DESC_TX_EOP : 0;
|
|
txd->dma_len = cpu_to_le16(skb_headlen(skb));
|
|
nfp_desc_set_dma_addr(txd, dma_addr);
|
|
txd->data_len = cpu_to_le16(skb->len);
|
|
|
|
txd->flags = 0;
|
|
txd->mss = 0;
|
|
txd->l4_offset = 0;
|
|
|
|
nfp_net_tx_tso(nn, r_vec, txbuf, txd, skb);
|
|
|
|
nfp_net_tx_csum(nn, r_vec, txbuf, txd, skb);
|
|
|
|
if (skb_vlan_tag_present(skb) && nn->ctrl & NFP_NET_CFG_CTRL_TXVLAN) {
|
|
txd->flags |= PCIE_DESC_TX_VLAN;
|
|
txd->vlan = cpu_to_le16(skb_vlan_tag_get(skb));
|
|
}
|
|
|
|
/* Gather DMA */
|
|
if (nr_frags > 0) {
|
|
/* all descs must match except for in addr, length and eop */
|
|
txdg = *txd;
|
|
|
|
for (f = 0; f < nr_frags; f++) {
|
|
frag = &skb_shinfo(skb)->frags[f];
|
|
fsize = skb_frag_size(frag);
|
|
|
|
dma_addr = skb_frag_dma_map(&nn->pdev->dev, frag, 0,
|
|
fsize, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&nn->pdev->dev, dma_addr))
|
|
goto err_unmap;
|
|
|
|
wr_idx = (wr_idx + 1) % tx_ring->cnt;
|
|
tx_ring->txbufs[wr_idx].skb = skb;
|
|
tx_ring->txbufs[wr_idx].dma_addr = dma_addr;
|
|
tx_ring->txbufs[wr_idx].fidx = f;
|
|
|
|
txd = &tx_ring->txds[wr_idx];
|
|
*txd = txdg;
|
|
txd->dma_len = cpu_to_le16(fsize);
|
|
nfp_desc_set_dma_addr(txd, dma_addr);
|
|
txd->offset_eop =
|
|
(f == nr_frags - 1) ? PCIE_DESC_TX_EOP : 0;
|
|
}
|
|
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_gather++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
}
|
|
|
|
netdev_tx_sent_queue(nd_q, txbuf->real_len);
|
|
|
|
tx_ring->wr_p += nr_frags + 1;
|
|
if (nfp_net_tx_ring_should_stop(tx_ring))
|
|
nfp_net_tx_ring_stop(nd_q, tx_ring);
|
|
|
|
tx_ring->wr_ptr_add += nr_frags + 1;
|
|
if (!skb->xmit_more || netif_xmit_stopped(nd_q)) {
|
|
/* force memory write before we let HW know */
|
|
wmb();
|
|
nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add);
|
|
tx_ring->wr_ptr_add = 0;
|
|
}
|
|
|
|
skb_tx_timestamp(skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
err_unmap:
|
|
--f;
|
|
while (f >= 0) {
|
|
frag = &skb_shinfo(skb)->frags[f];
|
|
dma_unmap_page(&nn->pdev->dev,
|
|
tx_ring->txbufs[wr_idx].dma_addr,
|
|
skb_frag_size(frag), DMA_TO_DEVICE);
|
|
tx_ring->txbufs[wr_idx].skb = NULL;
|
|
tx_ring->txbufs[wr_idx].dma_addr = 0;
|
|
tx_ring->txbufs[wr_idx].fidx = -2;
|
|
wr_idx = wr_idx - 1;
|
|
if (wr_idx < 0)
|
|
wr_idx += tx_ring->cnt;
|
|
}
|
|
dma_unmap_single(&nn->pdev->dev, tx_ring->txbufs[wr_idx].dma_addr,
|
|
skb_headlen(skb), DMA_TO_DEVICE);
|
|
tx_ring->txbufs[wr_idx].skb = NULL;
|
|
tx_ring->txbufs[wr_idx].dma_addr = 0;
|
|
tx_ring->txbufs[wr_idx].fidx = -2;
|
|
err_free:
|
|
nn_warn_ratelimit(nn, "Failed to map DMA TX buffer\n");
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_errors++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_complete() - Handled completed TX packets
|
|
* @tx_ring: TX ring structure
|
|
*
|
|
* Return: Number of completed TX descriptors
|
|
*/
|
|
static void nfp_net_tx_complete(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
const struct skb_frag_struct *frag;
|
|
struct netdev_queue *nd_q;
|
|
u32 done_pkts = 0, done_bytes = 0;
|
|
struct sk_buff *skb;
|
|
int todo, nr_frags;
|
|
u32 qcp_rd_p;
|
|
int fidx;
|
|
int idx;
|
|
|
|
/* Work out how many descriptors have been transmitted */
|
|
qcp_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
|
|
|
|
if (qcp_rd_p == tx_ring->qcp_rd_p)
|
|
return;
|
|
|
|
if (qcp_rd_p > tx_ring->qcp_rd_p)
|
|
todo = qcp_rd_p - tx_ring->qcp_rd_p;
|
|
else
|
|
todo = qcp_rd_p + tx_ring->cnt - tx_ring->qcp_rd_p;
|
|
|
|
while (todo--) {
|
|
idx = tx_ring->rd_p % tx_ring->cnt;
|
|
tx_ring->rd_p++;
|
|
|
|
skb = tx_ring->txbufs[idx].skb;
|
|
if (!skb)
|
|
continue;
|
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags;
|
|
fidx = tx_ring->txbufs[idx].fidx;
|
|
|
|
if (fidx == -1) {
|
|
/* unmap head */
|
|
dma_unmap_single(&nn->pdev->dev,
|
|
tx_ring->txbufs[idx].dma_addr,
|
|
skb_headlen(skb), DMA_TO_DEVICE);
|
|
|
|
done_pkts += tx_ring->txbufs[idx].pkt_cnt;
|
|
done_bytes += tx_ring->txbufs[idx].real_len;
|
|
} else {
|
|
/* unmap fragment */
|
|
frag = &skb_shinfo(skb)->frags[fidx];
|
|
dma_unmap_page(&nn->pdev->dev,
|
|
tx_ring->txbufs[idx].dma_addr,
|
|
skb_frag_size(frag), DMA_TO_DEVICE);
|
|
}
|
|
|
|
/* check for last gather fragment */
|
|
if (fidx == nr_frags - 1)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
tx_ring->txbufs[idx].dma_addr = 0;
|
|
tx_ring->txbufs[idx].skb = NULL;
|
|
tx_ring->txbufs[idx].fidx = -2;
|
|
}
|
|
|
|
tx_ring->qcp_rd_p = qcp_rd_p;
|
|
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_bytes += done_bytes;
|
|
r_vec->tx_pkts += done_pkts;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
|
|
nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx);
|
|
netdev_tx_completed_queue(nd_q, done_pkts, done_bytes);
|
|
if (nfp_net_tx_ring_should_wake(tx_ring)) {
|
|
/* Make sure TX thread will see updated tx_ring->rd_p */
|
|
smp_mb();
|
|
|
|
if (unlikely(netif_tx_queue_stopped(nd_q)))
|
|
netif_tx_wake_queue(nd_q);
|
|
}
|
|
|
|
WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt,
|
|
"TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
|
|
tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers
|
|
* @nn: NFP Net device
|
|
* @tx_ring: TX ring structure
|
|
*
|
|
* Assumes that the device is stopped
|
|
*/
|
|
static void
|
|
nfp_net_tx_ring_reset(struct nfp_net *nn, struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
const struct skb_frag_struct *frag;
|
|
struct netdev_queue *nd_q;
|
|
struct pci_dev *pdev = nn->pdev;
|
|
|
|
while (tx_ring->rd_p != tx_ring->wr_p) {
|
|
int nr_frags, fidx, idx;
|
|
struct sk_buff *skb;
|
|
|
|
idx = tx_ring->rd_p % tx_ring->cnt;
|
|
skb = tx_ring->txbufs[idx].skb;
|
|
nr_frags = skb_shinfo(skb)->nr_frags;
|
|
fidx = tx_ring->txbufs[idx].fidx;
|
|
|
|
if (fidx == -1) {
|
|
/* unmap head */
|
|
dma_unmap_single(&pdev->dev,
|
|
tx_ring->txbufs[idx].dma_addr,
|
|
skb_headlen(skb), DMA_TO_DEVICE);
|
|
} else {
|
|
/* unmap fragment */
|
|
frag = &skb_shinfo(skb)->frags[fidx];
|
|
dma_unmap_page(&pdev->dev,
|
|
tx_ring->txbufs[idx].dma_addr,
|
|
skb_frag_size(frag), DMA_TO_DEVICE);
|
|
}
|
|
|
|
/* check for last gather fragment */
|
|
if (fidx == nr_frags - 1)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
tx_ring->txbufs[idx].dma_addr = 0;
|
|
tx_ring->txbufs[idx].skb = NULL;
|
|
tx_ring->txbufs[idx].fidx = -2;
|
|
|
|
tx_ring->qcp_rd_p++;
|
|
tx_ring->rd_p++;
|
|
}
|
|
|
|
memset(tx_ring->txds, 0, sizeof(*tx_ring->txds) * tx_ring->cnt);
|
|
tx_ring->wr_p = 0;
|
|
tx_ring->rd_p = 0;
|
|
tx_ring->qcp_rd_p = 0;
|
|
tx_ring->wr_ptr_add = 0;
|
|
|
|
nd_q = netdev_get_tx_queue(nn->netdev, tx_ring->idx);
|
|
netdev_tx_reset_queue(nd_q);
|
|
}
|
|
|
|
static void nfp_net_tx_timeout(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int i;
|
|
|
|
for (i = 0; i < nn->num_tx_rings; i++) {
|
|
if (!netif_tx_queue_stopped(netdev_get_tx_queue(netdev, i)))
|
|
continue;
|
|
nn_warn(nn, "TX timeout on ring: %d\n", i);
|
|
}
|
|
nn_warn(nn, "TX watchdog timeout\n");
|
|
}
|
|
|
|
/* Receive processing
|
|
*/
|
|
|
|
/**
|
|
* nfp_net_rx_space() - return the number of free slots on the RX ring
|
|
* @rx_ring: RX ring structure
|
|
*
|
|
* Make sure we leave at least one slot free.
|
|
*
|
|
* Return: True if there is space on the RX ring
|
|
*/
|
|
static inline int nfp_net_rx_space(struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
return (rx_ring->cnt - 1) - (rx_ring->wr_p - rx_ring->rd_p);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_alloc_one() - Allocate and map skb for RX
|
|
* @rx_ring: RX ring structure of the skb
|
|
* @dma_addr: Pointer to storage for DMA address (output param)
|
|
* @fl_bufsz: size of freelist buffers
|
|
*
|
|
* This function will allcate a new skb, map it for DMA.
|
|
*
|
|
* Return: allocated skb or NULL on failure.
|
|
*/
|
|
static struct sk_buff *
|
|
nfp_net_rx_alloc_one(struct nfp_net_rx_ring *rx_ring, dma_addr_t *dma_addr,
|
|
unsigned int fl_bufsz)
|
|
{
|
|
struct nfp_net *nn = rx_ring->r_vec->nfp_net;
|
|
struct sk_buff *skb;
|
|
|
|
skb = netdev_alloc_skb(nn->netdev, fl_bufsz);
|
|
if (!skb) {
|
|
nn_warn_ratelimit(nn, "Failed to alloc receive SKB\n");
|
|
return NULL;
|
|
}
|
|
|
|
*dma_addr = dma_map_single(&nn->pdev->dev, skb->data,
|
|
fl_bufsz, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(&nn->pdev->dev, *dma_addr)) {
|
|
dev_kfree_skb_any(skb);
|
|
nn_warn_ratelimit(nn, "Failed to map DMA RX buffer\n");
|
|
return NULL;
|
|
}
|
|
|
|
return skb;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings
|
|
* @rx_ring: RX ring structure
|
|
* @skb: Skb to put on rings
|
|
* @dma_addr: DMA address of skb mapping
|
|
*/
|
|
static void nfp_net_rx_give_one(struct nfp_net_rx_ring *rx_ring,
|
|
struct sk_buff *skb, dma_addr_t dma_addr)
|
|
{
|
|
unsigned int wr_idx;
|
|
|
|
wr_idx = rx_ring->wr_p % rx_ring->cnt;
|
|
|
|
/* Stash SKB and DMA address away */
|
|
rx_ring->rxbufs[wr_idx].skb = skb;
|
|
rx_ring->rxbufs[wr_idx].dma_addr = dma_addr;
|
|
|
|
/* Fill freelist descriptor */
|
|
rx_ring->rxds[wr_idx].fld.reserved = 0;
|
|
rx_ring->rxds[wr_idx].fld.meta_len_dd = 0;
|
|
nfp_desc_set_dma_addr(&rx_ring->rxds[wr_idx].fld, dma_addr);
|
|
|
|
rx_ring->wr_p++;
|
|
rx_ring->wr_ptr_add++;
|
|
if (rx_ring->wr_ptr_add >= NFP_NET_FL_BATCH) {
|
|
/* Update write pointer of the freelist queue. Make
|
|
* sure all writes are flushed before telling the hardware.
|
|
*/
|
|
wmb();
|
|
nfp_qcp_wr_ptr_add(rx_ring->qcp_fl, rx_ring->wr_ptr_add);
|
|
rx_ring->wr_ptr_add = 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_reset() - Reflect in SW state of freelist after disable
|
|
* @rx_ring: RX ring structure
|
|
*
|
|
* Warning: Do *not* call if ring buffers were never put on the FW freelist
|
|
* (i.e. device was not enabled)!
|
|
*/
|
|
static void nfp_net_rx_ring_reset(struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
unsigned int wr_idx, last_idx;
|
|
|
|
/* Move the empty entry to the end of the list */
|
|
wr_idx = rx_ring->wr_p % rx_ring->cnt;
|
|
last_idx = rx_ring->cnt - 1;
|
|
rx_ring->rxbufs[wr_idx].dma_addr = rx_ring->rxbufs[last_idx].dma_addr;
|
|
rx_ring->rxbufs[wr_idx].skb = rx_ring->rxbufs[last_idx].skb;
|
|
rx_ring->rxbufs[last_idx].dma_addr = 0;
|
|
rx_ring->rxbufs[last_idx].skb = NULL;
|
|
|
|
memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt);
|
|
rx_ring->wr_p = 0;
|
|
rx_ring->rd_p = 0;
|
|
rx_ring->wr_ptr_add = 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring
|
|
* @nn: NFP Net device
|
|
* @rx_ring: RX ring to remove buffers from
|
|
*
|
|
* Assumes that the device is stopped and buffers are in [0, ring->cnt - 1)
|
|
* entries. After device is disabled nfp_net_rx_ring_reset() must be called
|
|
* to restore required ring geometry.
|
|
*/
|
|
static void
|
|
nfp_net_rx_ring_bufs_free(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
struct pci_dev *pdev = nn->pdev;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < rx_ring->cnt - 1; i++) {
|
|
/* NULL skb can only happen when initial filling of the ring
|
|
* fails to allocate enough buffers and calls here to free
|
|
* already allocated ones.
|
|
*/
|
|
if (!rx_ring->rxbufs[i].skb)
|
|
continue;
|
|
|
|
dma_unmap_single(&pdev->dev, rx_ring->rxbufs[i].dma_addr,
|
|
rx_ring->bufsz, DMA_FROM_DEVICE);
|
|
dev_kfree_skb_any(rx_ring->rxbufs[i].skb);
|
|
rx_ring->rxbufs[i].dma_addr = 0;
|
|
rx_ring->rxbufs[i].skb = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW)
|
|
* @nn: NFP Net device
|
|
* @rx_ring: RX ring to remove buffers from
|
|
*/
|
|
static int
|
|
nfp_net_rx_ring_bufs_alloc(struct nfp_net *nn, struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
struct nfp_net_rx_buf *rxbufs;
|
|
unsigned int i;
|
|
|
|
rxbufs = rx_ring->rxbufs;
|
|
|
|
for (i = 0; i < rx_ring->cnt - 1; i++) {
|
|
rxbufs[i].skb =
|
|
nfp_net_rx_alloc_one(rx_ring, &rxbufs[i].dma_addr,
|
|
rx_ring->bufsz);
|
|
if (!rxbufs[i].skb) {
|
|
nfp_net_rx_ring_bufs_free(nn, rx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW
|
|
* @rx_ring: RX ring to fill
|
|
*/
|
|
static void nfp_net_rx_ring_fill_freelist(struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < rx_ring->cnt - 1; i++)
|
|
nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[i].skb,
|
|
rx_ring->rxbufs[i].dma_addr);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_csum_has_errors() - group check if rxd has any csum errors
|
|
* @flags: RX descriptor flags field in CPU byte order
|
|
*/
|
|
static int nfp_net_rx_csum_has_errors(u16 flags)
|
|
{
|
|
u16 csum_all_checked, csum_all_ok;
|
|
|
|
csum_all_checked = flags & __PCIE_DESC_RX_CSUM_ALL;
|
|
csum_all_ok = flags & __PCIE_DESC_RX_CSUM_ALL_OK;
|
|
|
|
return csum_all_checked != (csum_all_ok << PCIE_DESC_RX_CSUM_OK_SHIFT);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_csum() - set SKB checksum field based on RX descriptor flags
|
|
* @nn: NFP Net device
|
|
* @r_vec: per-ring structure
|
|
* @rxd: Pointer to RX descriptor
|
|
* @skb: Pointer to SKB
|
|
*/
|
|
static void nfp_net_rx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
struct nfp_net_rx_desc *rxd, struct sk_buff *skb)
|
|
{
|
|
skb_checksum_none_assert(skb);
|
|
|
|
if (!(nn->netdev->features & NETIF_F_RXCSUM))
|
|
return;
|
|
|
|
if (nfp_net_rx_csum_has_errors(le16_to_cpu(rxd->rxd.flags))) {
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->hw_csum_rx_error++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
return;
|
|
}
|
|
|
|
/* Assume that the firmware will never report inner CSUM_OK unless outer
|
|
* L4 headers were successfully parsed. FW will always report zero UDP
|
|
* checksum as CSUM_OK.
|
|
*/
|
|
if (rxd->rxd.flags & PCIE_DESC_RX_TCP_CSUM_OK ||
|
|
rxd->rxd.flags & PCIE_DESC_RX_UDP_CSUM_OK) {
|
|
__skb_incr_checksum_unnecessary(skb);
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->hw_csum_rx_ok++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
}
|
|
|
|
if (rxd->rxd.flags & PCIE_DESC_RX_I_TCP_CSUM_OK ||
|
|
rxd->rxd.flags & PCIE_DESC_RX_I_UDP_CSUM_OK) {
|
|
__skb_incr_checksum_unnecessary(skb);
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->hw_csum_rx_inner_ok++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_set_hash() - Set SKB hash data
|
|
* @netdev: adapter's net_device structure
|
|
* @skb: SKB to set the hash data on
|
|
* @rxd: RX descriptor
|
|
*
|
|
* The RSS hash and hash-type are pre-pended to the packet data.
|
|
* Extract and decode it and set the skb fields.
|
|
*/
|
|
static void nfp_net_set_hash(struct net_device *netdev, struct sk_buff *skb,
|
|
struct nfp_net_rx_desc *rxd)
|
|
{
|
|
struct nfp_net_rx_hash *rx_hash;
|
|
|
|
if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS) ||
|
|
!(netdev->features & NETIF_F_RXHASH))
|
|
return;
|
|
|
|
rx_hash = (struct nfp_net_rx_hash *)(skb->data - sizeof(*rx_hash));
|
|
|
|
switch (be32_to_cpu(rx_hash->hash_type)) {
|
|
case NFP_NET_RSS_IPV4:
|
|
case NFP_NET_RSS_IPV6:
|
|
case NFP_NET_RSS_IPV6_EX:
|
|
skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L3);
|
|
break;
|
|
default:
|
|
skb_set_hash(skb, be32_to_cpu(rx_hash->hash), PKT_HASH_TYPE_L4);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx() - receive up to @budget packets on @rx_ring
|
|
* @rx_ring: RX ring to receive from
|
|
* @budget: NAPI budget
|
|
*
|
|
* Note, this function is separated out from the napi poll function to
|
|
* more cleanly separate packet receive code from other bookkeeping
|
|
* functions performed in the napi poll function.
|
|
*
|
|
* There are differences between the NFP-3200 firmware and the
|
|
* NFP-6000 firmware. The NFP-3200 firmware uses a dedicated RX queue
|
|
* to indicate that new packets have arrived. The NFP-6000 does not
|
|
* have this queue and uses the DD bit in the RX descriptor. This
|
|
* method cannot be used on the NFP-3200 as it causes a race
|
|
* condition: The RX ring write pointer on the NFP-3200 is updated
|
|
* after packets (and descriptors) have been DMAed. If the DD bit is
|
|
* used and subsequently the read pointer is updated this may lead to
|
|
* the RX queue to underflow (if the firmware has not yet update the
|
|
* write pointer). Therefore we use slightly ugly conditional code
|
|
* below to handle the differences. We may, in the future update the
|
|
* NFP-3200 firmware to behave the same as the firmware on the
|
|
* NFP-6000.
|
|
*
|
|
* Return: Number of packets received.
|
|
*/
|
|
static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
unsigned int data_len, meta_len;
|
|
int avail = 0, pkts_polled = 0;
|
|
struct sk_buff *skb, *new_skb;
|
|
struct nfp_net_rx_desc *rxd;
|
|
dma_addr_t new_dma_addr;
|
|
u32 qcp_wr_p;
|
|
int idx;
|
|
|
|
if (nn->is_nfp3200) {
|
|
/* Work out how many packets arrived */
|
|
qcp_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx);
|
|
idx = rx_ring->rd_p % rx_ring->cnt;
|
|
|
|
if (qcp_wr_p == idx)
|
|
/* No new packets */
|
|
return 0;
|
|
|
|
if (qcp_wr_p > idx)
|
|
avail = qcp_wr_p - idx;
|
|
else
|
|
avail = qcp_wr_p + rx_ring->cnt - idx;
|
|
} else {
|
|
avail = budget + 1;
|
|
}
|
|
|
|
while (avail > 0 && pkts_polled < budget) {
|
|
idx = rx_ring->rd_p % rx_ring->cnt;
|
|
|
|
rxd = &rx_ring->rxds[idx];
|
|
if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD)) {
|
|
if (nn->is_nfp3200)
|
|
nn_dbg(nn, "RX descriptor not valid (DD)%d:%u rxd[0]=%#x rxd[1]=%#x\n",
|
|
rx_ring->idx, idx,
|
|
rxd->vals[0], rxd->vals[1]);
|
|
break;
|
|
}
|
|
/* Memory barrier to ensure that we won't do other reads
|
|
* before the DD bit.
|
|
*/
|
|
dma_rmb();
|
|
|
|
rx_ring->rd_p++;
|
|
pkts_polled++;
|
|
avail--;
|
|
|
|
skb = rx_ring->rxbufs[idx].skb;
|
|
|
|
new_skb = nfp_net_rx_alloc_one(rx_ring, &new_dma_addr,
|
|
nn->fl_bufsz);
|
|
if (!new_skb) {
|
|
nfp_net_rx_give_one(rx_ring, rx_ring->rxbufs[idx].skb,
|
|
rx_ring->rxbufs[idx].dma_addr);
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->rx_drops++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
continue;
|
|
}
|
|
|
|
dma_unmap_single(&nn->pdev->dev,
|
|
rx_ring->rxbufs[idx].dma_addr,
|
|
nn->fl_bufsz, DMA_FROM_DEVICE);
|
|
|
|
nfp_net_rx_give_one(rx_ring, new_skb, new_dma_addr);
|
|
|
|
/* < meta_len >
|
|
* <-- [rx_offset] -->
|
|
* ---------------------------------------------------------
|
|
* | [XX] | metadata | packet | XXXX |
|
|
* ---------------------------------------------------------
|
|
* <---------------- data_len --------------->
|
|
*
|
|
* The rx_offset is fixed for all packets, the meta_len can vary
|
|
* on a packet by packet basis. If rx_offset is set to zero
|
|
* (_RX_OFFSET_DYNAMIC) metadata starts at the beginning of the
|
|
* buffer and is immediately followed by the packet (no [XX]).
|
|
*/
|
|
meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK;
|
|
data_len = le16_to_cpu(rxd->rxd.data_len);
|
|
|
|
if (nn->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
|
|
skb_reserve(skb, meta_len);
|
|
else
|
|
skb_reserve(skb, nn->rx_offset);
|
|
skb_put(skb, data_len - meta_len);
|
|
|
|
nfp_net_set_hash(nn->netdev, skb, rxd);
|
|
|
|
/* Pad small frames to minimum */
|
|
if (skb_put_padto(skb, 60))
|
|
break;
|
|
|
|
/* Stats update */
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->rx_pkts++;
|
|
r_vec->rx_bytes += skb->len;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
|
|
skb_record_rx_queue(skb, rx_ring->idx);
|
|
skb->protocol = eth_type_trans(skb, nn->netdev);
|
|
|
|
nfp_net_rx_csum(nn, r_vec, rxd, skb);
|
|
|
|
if (rxd->rxd.flags & PCIE_DESC_RX_VLAN)
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
le16_to_cpu(rxd->rxd.vlan));
|
|
|
|
napi_gro_receive(&rx_ring->r_vec->napi, skb);
|
|
}
|
|
|
|
if (nn->is_nfp3200)
|
|
nfp_qcp_rd_ptr_add(rx_ring->qcp_rx, pkts_polled);
|
|
|
|
return pkts_polled;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_poll() - napi poll function
|
|
* @napi: NAPI structure
|
|
* @budget: NAPI budget
|
|
*
|
|
* Return: number of packets polled.
|
|
*/
|
|
static int nfp_net_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct nfp_net_r_vector *r_vec =
|
|
container_of(napi, struct nfp_net_r_vector, napi);
|
|
struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring;
|
|
struct nfp_net_tx_ring *tx_ring = r_vec->tx_ring;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct netdev_queue *txq;
|
|
unsigned int pkts_polled;
|
|
|
|
tx_ring = &nn->tx_rings[rx_ring->idx];
|
|
txq = netdev_get_tx_queue(nn->netdev, tx_ring->idx);
|
|
nfp_net_tx_complete(tx_ring);
|
|
|
|
pkts_polled = nfp_net_rx(rx_ring, budget);
|
|
|
|
if (pkts_polled < budget) {
|
|
napi_complete_done(napi, pkts_polled);
|
|
nfp_net_irq_unmask(nn, r_vec->irq_idx);
|
|
}
|
|
|
|
return pkts_polled;
|
|
}
|
|
|
|
/* Setup and Configuration
|
|
*/
|
|
|
|
/**
|
|
* nfp_net_tx_ring_free() - Free resources allocated to a TX ring
|
|
* @tx_ring: TX ring to free
|
|
*/
|
|
static void nfp_net_tx_ring_free(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct pci_dev *pdev = nn->pdev;
|
|
|
|
kfree(tx_ring->txbufs);
|
|
|
|
if (tx_ring->txds)
|
|
dma_free_coherent(&pdev->dev, tx_ring->size,
|
|
tx_ring->txds, tx_ring->dma);
|
|
|
|
tx_ring->cnt = 0;
|
|
tx_ring->txbufs = NULL;
|
|
tx_ring->txds = NULL;
|
|
tx_ring->dma = 0;
|
|
tx_ring->size = 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_ring_alloc() - Allocate resource for a TX ring
|
|
* @tx_ring: TX Ring structure to allocate
|
|
* @cnt: Ring buffer count
|
|
*
|
|
* Return: 0 on success, negative errno otherwise.
|
|
*/
|
|
static int nfp_net_tx_ring_alloc(struct nfp_net_tx_ring *tx_ring, u32 cnt)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct pci_dev *pdev = nn->pdev;
|
|
int sz;
|
|
|
|
tx_ring->cnt = cnt;
|
|
|
|
tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt;
|
|
tx_ring->txds = dma_zalloc_coherent(&pdev->dev, tx_ring->size,
|
|
&tx_ring->dma, GFP_KERNEL);
|
|
if (!tx_ring->txds)
|
|
goto err_alloc;
|
|
|
|
sz = sizeof(*tx_ring->txbufs) * tx_ring->cnt;
|
|
tx_ring->txbufs = kzalloc(sz, GFP_KERNEL);
|
|
if (!tx_ring->txbufs)
|
|
goto err_alloc;
|
|
|
|
netif_set_xps_queue(nn->netdev, &r_vec->affinity_mask, tx_ring->idx);
|
|
|
|
nn_dbg(nn, "TxQ%02d: QCidx=%02d cnt=%d dma=%#llx host=%p\n",
|
|
tx_ring->idx, tx_ring->qcidx,
|
|
tx_ring->cnt, (unsigned long long)tx_ring->dma, tx_ring->txds);
|
|
|
|
return 0;
|
|
|
|
err_alloc:
|
|
nfp_net_tx_ring_free(tx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static struct nfp_net_tx_ring *
|
|
nfp_net_shadow_tx_rings_prepare(struct nfp_net *nn, u32 buf_cnt)
|
|
{
|
|
struct nfp_net_tx_ring *rings;
|
|
unsigned int r;
|
|
|
|
rings = kcalloc(nn->num_tx_rings, sizeof(*rings), GFP_KERNEL);
|
|
if (!rings)
|
|
return NULL;
|
|
|
|
for (r = 0; r < nn->num_tx_rings; r++) {
|
|
nfp_net_tx_ring_init(&rings[r], nn->tx_rings[r].r_vec, r);
|
|
|
|
if (nfp_net_tx_ring_alloc(&rings[r], buf_cnt))
|
|
goto err_free_prev;
|
|
}
|
|
|
|
return rings;
|
|
|
|
err_free_prev:
|
|
while (r--)
|
|
nfp_net_tx_ring_free(&rings[r]);
|
|
kfree(rings);
|
|
return NULL;
|
|
}
|
|
|
|
static struct nfp_net_tx_ring *
|
|
nfp_net_shadow_tx_rings_swap(struct nfp_net *nn, struct nfp_net_tx_ring *rings)
|
|
{
|
|
struct nfp_net_tx_ring *old = nn->tx_rings;
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < nn->num_tx_rings; r++)
|
|
old[r].r_vec->tx_ring = &rings[r];
|
|
|
|
nn->tx_rings = rings;
|
|
return old;
|
|
}
|
|
|
|
static void
|
|
nfp_net_shadow_tx_rings_free(struct nfp_net *nn, struct nfp_net_tx_ring *rings)
|
|
{
|
|
unsigned int r;
|
|
|
|
if (!rings)
|
|
return;
|
|
|
|
for (r = 0; r < nn->num_tx_rings; r++)
|
|
nfp_net_tx_ring_free(&rings[r]);
|
|
|
|
kfree(rings);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_free() - Free resources allocated to a RX ring
|
|
* @rx_ring: RX ring to free
|
|
*/
|
|
static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct pci_dev *pdev = nn->pdev;
|
|
|
|
kfree(rx_ring->rxbufs);
|
|
|
|
if (rx_ring->rxds)
|
|
dma_free_coherent(&pdev->dev, rx_ring->size,
|
|
rx_ring->rxds, rx_ring->dma);
|
|
|
|
rx_ring->cnt = 0;
|
|
rx_ring->rxbufs = NULL;
|
|
rx_ring->rxds = NULL;
|
|
rx_ring->dma = 0;
|
|
rx_ring->size = 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_alloc() - Allocate resource for a RX ring
|
|
* @rx_ring: RX ring to allocate
|
|
* @fl_bufsz: Size of buffers to allocate
|
|
* @cnt: Ring buffer count
|
|
*
|
|
* Return: 0 on success, negative errno otherwise.
|
|
*/
|
|
static int
|
|
nfp_net_rx_ring_alloc(struct nfp_net_rx_ring *rx_ring, unsigned int fl_bufsz,
|
|
u32 cnt)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct pci_dev *pdev = nn->pdev;
|
|
int sz;
|
|
|
|
rx_ring->cnt = cnt;
|
|
rx_ring->bufsz = fl_bufsz;
|
|
|
|
rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;
|
|
rx_ring->rxds = dma_zalloc_coherent(&pdev->dev, rx_ring->size,
|
|
&rx_ring->dma, GFP_KERNEL);
|
|
if (!rx_ring->rxds)
|
|
goto err_alloc;
|
|
|
|
sz = sizeof(*rx_ring->rxbufs) * rx_ring->cnt;
|
|
rx_ring->rxbufs = kzalloc(sz, GFP_KERNEL);
|
|
if (!rx_ring->rxbufs)
|
|
goto err_alloc;
|
|
|
|
nn_dbg(nn, "RxQ%02d: FlQCidx=%02d RxQCidx=%02d cnt=%d dma=%#llx host=%p\n",
|
|
rx_ring->idx, rx_ring->fl_qcidx, rx_ring->rx_qcidx,
|
|
rx_ring->cnt, (unsigned long long)rx_ring->dma, rx_ring->rxds);
|
|
|
|
return 0;
|
|
|
|
err_alloc:
|
|
nfp_net_rx_ring_free(rx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static struct nfp_net_rx_ring *
|
|
nfp_net_shadow_rx_rings_prepare(struct nfp_net *nn, unsigned int fl_bufsz,
|
|
u32 buf_cnt)
|
|
{
|
|
struct nfp_net_rx_ring *rings;
|
|
unsigned int r;
|
|
|
|
rings = kcalloc(nn->num_rx_rings, sizeof(*rings), GFP_KERNEL);
|
|
if (!rings)
|
|
return NULL;
|
|
|
|
for (r = 0; r < nn->num_rx_rings; r++) {
|
|
nfp_net_rx_ring_init(&rings[r], nn->rx_rings[r].r_vec, r);
|
|
|
|
if (nfp_net_rx_ring_alloc(&rings[r], fl_bufsz, buf_cnt))
|
|
goto err_free_prev;
|
|
|
|
if (nfp_net_rx_ring_bufs_alloc(nn, &rings[r]))
|
|
goto err_free_ring;
|
|
}
|
|
|
|
return rings;
|
|
|
|
err_free_prev:
|
|
while (r--) {
|
|
nfp_net_rx_ring_bufs_free(nn, &rings[r]);
|
|
err_free_ring:
|
|
nfp_net_rx_ring_free(&rings[r]);
|
|
}
|
|
kfree(rings);
|
|
return NULL;
|
|
}
|
|
|
|
static struct nfp_net_rx_ring *
|
|
nfp_net_shadow_rx_rings_swap(struct nfp_net *nn, struct nfp_net_rx_ring *rings)
|
|
{
|
|
struct nfp_net_rx_ring *old = nn->rx_rings;
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < nn->num_rx_rings; r++)
|
|
old[r].r_vec->rx_ring = &rings[r];
|
|
|
|
nn->rx_rings = rings;
|
|
return old;
|
|
}
|
|
|
|
static void
|
|
nfp_net_shadow_rx_rings_free(struct nfp_net *nn, struct nfp_net_rx_ring *rings)
|
|
{
|
|
unsigned int r;
|
|
|
|
if (!rings)
|
|
return;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
nfp_net_rx_ring_bufs_free(nn, &rings[r]);
|
|
nfp_net_rx_ring_free(&rings[r]);
|
|
}
|
|
|
|
kfree(rings);
|
|
}
|
|
|
|
static int
|
|
nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
int idx)
|
|
{
|
|
struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx];
|
|
int err;
|
|
|
|
r_vec->tx_ring = &nn->tx_rings[idx];
|
|
nfp_net_tx_ring_init(r_vec->tx_ring, r_vec, idx);
|
|
|
|
r_vec->rx_ring = &nn->rx_rings[idx];
|
|
nfp_net_rx_ring_init(r_vec->rx_ring, r_vec, idx);
|
|
|
|
snprintf(r_vec->name, sizeof(r_vec->name),
|
|
"%s-rxtx-%d", nn->netdev->name, idx);
|
|
err = request_irq(entry->vector, r_vec->handler, 0, r_vec->name, r_vec);
|
|
if (err) {
|
|
nn_err(nn, "Error requesting IRQ %d\n", entry->vector);
|
|
return err;
|
|
}
|
|
disable_irq(entry->vector);
|
|
|
|
/* Setup NAPI */
|
|
netif_napi_add(nn->netdev, &r_vec->napi,
|
|
nfp_net_poll, NAPI_POLL_WEIGHT);
|
|
|
|
irq_set_affinity_hint(entry->vector, &r_vec->affinity_mask);
|
|
|
|
nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, entry->vector, entry->entry);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
|
|
{
|
|
struct msix_entry *entry = &nn->irq_entries[r_vec->irq_idx];
|
|
|
|
irq_set_affinity_hint(entry->vector, NULL);
|
|
netif_napi_del(&r_vec->napi);
|
|
free_irq(entry->vector, r_vec);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rss_write_itbl() - Write RSS indirection table to device
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_rss_write_itbl(struct nfp_net *nn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NFP_NET_CFG_RSS_ITBL_SZ; i += 4)
|
|
nn_writel(nn, NFP_NET_CFG_RSS_ITBL + i,
|
|
get_unaligned_le32(nn->rss_itbl + i));
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rss_write_key() - Write RSS hash key to device
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_rss_write_key(struct nfp_net *nn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NFP_NET_CFG_RSS_KEY_SZ; i += 4)
|
|
nn_writel(nn, NFP_NET_CFG_RSS_KEY + i,
|
|
get_unaligned_le32(nn->rss_key + i));
|
|
}
|
|
|
|
/**
|
|
* nfp_net_coalesce_write_cfg() - Write irq coalescence configuration to HW
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_coalesce_write_cfg(struct nfp_net *nn)
|
|
{
|
|
u8 i;
|
|
u32 factor;
|
|
u32 value;
|
|
|
|
/* Compute factor used to convert coalesce '_usecs' parameters to
|
|
* ME timestamp ticks. There are 16 ME clock cycles for each timestamp
|
|
* count.
|
|
*/
|
|
factor = nn->me_freq_mhz / 16;
|
|
|
|
/* copy RX interrupt coalesce parameters */
|
|
value = (nn->rx_coalesce_max_frames << 16) |
|
|
(factor * nn->rx_coalesce_usecs);
|
|
for (i = 0; i < nn->num_r_vecs; i++)
|
|
nn_writel(nn, NFP_NET_CFG_RXR_IRQ_MOD(i), value);
|
|
|
|
/* copy TX interrupt coalesce parameters */
|
|
value = (nn->tx_coalesce_max_frames << 16) |
|
|
(factor * nn->tx_coalesce_usecs);
|
|
for (i = 0; i < nn->num_r_vecs; i++)
|
|
nn_writel(nn, NFP_NET_CFG_TXR_IRQ_MOD(i), value);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_write_mac_addr() - Write mac address to the device control BAR
|
|
* @nn: NFP Net device to reconfigure
|
|
*
|
|
* Writes the MAC address from the netdev to the device control BAR. Does not
|
|
* perform the required reconfig. We do a bit of byte swapping dance because
|
|
* firmware is LE.
|
|
*/
|
|
static void nfp_net_write_mac_addr(struct nfp_net *nn)
|
|
{
|
|
nn_writel(nn, NFP_NET_CFG_MACADDR + 0,
|
|
get_unaligned_be32(nn->netdev->dev_addr));
|
|
/* We can't do writew for NFP-3200 compatibility */
|
|
nn_writel(nn, NFP_NET_CFG_MACADDR + 4,
|
|
get_unaligned_be16(nn->netdev->dev_addr + 4) << 16);
|
|
}
|
|
|
|
static void nfp_net_vec_clear_ring_data(struct nfp_net *nn, unsigned int idx)
|
|
{
|
|
nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), 0);
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), 0);
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), 0);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), 0);
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), 0);
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), 0);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_clear_config_and_disable() - Clear control BAR and disable NFP
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_clear_config_and_disable(struct nfp_net *nn)
|
|
{
|
|
u32 new_ctrl, update;
|
|
unsigned int r;
|
|
int err;
|
|
|
|
new_ctrl = nn->ctrl;
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_ENABLE;
|
|
update = NFP_NET_CFG_UPDATE_GEN;
|
|
update |= NFP_NET_CFG_UPDATE_MSIX;
|
|
update |= NFP_NET_CFG_UPDATE_RING;
|
|
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_RINGCFG;
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
|
|
nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
|
|
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
|
|
err = nfp_net_reconfig(nn, update);
|
|
if (err)
|
|
nn_err(nn, "Could not disable device: %d\n", err);
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
nfp_net_rx_ring_reset(nn->r_vecs[r].rx_ring);
|
|
nfp_net_tx_ring_reset(nn, nn->r_vecs[r].tx_ring);
|
|
nfp_net_vec_clear_ring_data(nn, r);
|
|
}
|
|
|
|
nn->ctrl = new_ctrl;
|
|
}
|
|
|
|
static void
|
|
nfp_net_vec_write_ring_data(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
unsigned int idx)
|
|
{
|
|
/* Write the DMA address, size and MSI-X info to the device */
|
|
nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), r_vec->rx_ring->dma);
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(r_vec->rx_ring->cnt));
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), r_vec->irq_idx);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), r_vec->tx_ring->dma);
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(r_vec->tx_ring->cnt));
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), r_vec->irq_idx);
|
|
}
|
|
|
|
static int __nfp_net_set_config_and_enable(struct nfp_net *nn)
|
|
{
|
|
u32 new_ctrl, update = 0;
|
|
unsigned int r;
|
|
int err;
|
|
|
|
new_ctrl = nn->ctrl;
|
|
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RSS) {
|
|
nfp_net_rss_write_key(nn);
|
|
nfp_net_rss_write_itbl(nn);
|
|
nn_writel(nn, NFP_NET_CFG_RSS_CTRL, nn->rss_cfg);
|
|
update |= NFP_NET_CFG_UPDATE_RSS;
|
|
}
|
|
|
|
if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
|
|
nfp_net_coalesce_write_cfg(nn);
|
|
|
|
new_ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
|
|
update |= NFP_NET_CFG_UPDATE_IRQMOD;
|
|
}
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++)
|
|
nfp_net_vec_write_ring_data(nn, &nn->r_vecs[r], r);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->num_tx_rings == 64 ?
|
|
0xffffffffffffffffULL : ((u64)1 << nn->num_tx_rings) - 1);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->num_rx_rings == 64 ?
|
|
0xffffffffffffffffULL : ((u64)1 << nn->num_rx_rings) - 1);
|
|
|
|
nfp_net_write_mac_addr(nn);
|
|
|
|
nn_writel(nn, NFP_NET_CFG_MTU, nn->netdev->mtu);
|
|
nn_writel(nn, NFP_NET_CFG_FLBUFSZ, nn->fl_bufsz);
|
|
|
|
/* Enable device */
|
|
new_ctrl |= NFP_NET_CFG_CTRL_ENABLE;
|
|
update |= NFP_NET_CFG_UPDATE_GEN;
|
|
update |= NFP_NET_CFG_UPDATE_MSIX;
|
|
update |= NFP_NET_CFG_UPDATE_RING;
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RINGCFG)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_RINGCFG;
|
|
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
|
|
err = nfp_net_reconfig(nn, update);
|
|
|
|
nn->ctrl = new_ctrl;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++)
|
|
nfp_net_rx_ring_fill_freelist(nn->r_vecs[r].rx_ring);
|
|
|
|
/* Since reconfiguration requests while NFP is down are ignored we
|
|
* have to wipe the entire VXLAN configuration and reinitialize it.
|
|
*/
|
|
if (nn->ctrl & NFP_NET_CFG_CTRL_VXLAN) {
|
|
memset(&nn->vxlan_ports, 0, sizeof(nn->vxlan_ports));
|
|
memset(&nn->vxlan_usecnt, 0, sizeof(nn->vxlan_usecnt));
|
|
udp_tunnel_get_rx_info(nn->netdev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_set_config_and_enable() - Write control BAR and enable NFP
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static int nfp_net_set_config_and_enable(struct nfp_net *nn)
|
|
{
|
|
int err;
|
|
|
|
err = __nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_open_stack() - Start the device from stack's perspective
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_open_stack(struct nfp_net *nn)
|
|
{
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
napi_enable(&nn->r_vecs[r].napi);
|
|
enable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector);
|
|
}
|
|
|
|
netif_tx_wake_all_queues(nn->netdev);
|
|
|
|
enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
|
|
nfp_net_read_link_status(nn);
|
|
}
|
|
|
|
static int nfp_net_netdev_open(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int err, r;
|
|
|
|
if (nn->ctrl & NFP_NET_CFG_CTRL_ENABLE) {
|
|
nn_err(nn, "Dev is already enabled: 0x%08x\n", nn->ctrl);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Step 1: Allocate resources for rings and the like
|
|
* - Request interrupts
|
|
* - Allocate RX and TX ring resources
|
|
* - Setup initial RSS table
|
|
*/
|
|
err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_EXN, "%s-exn",
|
|
nn->exn_name, sizeof(nn->exn_name),
|
|
NFP_NET_IRQ_EXN_IDX, nn->exn_handler);
|
|
if (err)
|
|
return err;
|
|
err = nfp_net_aux_irq_request(nn, NFP_NET_CFG_LSC, "%s-lsc",
|
|
nn->lsc_name, sizeof(nn->lsc_name),
|
|
NFP_NET_IRQ_LSC_IDX, nn->lsc_handler);
|
|
if (err)
|
|
goto err_free_exn;
|
|
disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
|
|
|
|
nn->rx_rings = kcalloc(nn->num_rx_rings, sizeof(*nn->rx_rings),
|
|
GFP_KERNEL);
|
|
if (!nn->rx_rings)
|
|
goto err_free_lsc;
|
|
nn->tx_rings = kcalloc(nn->num_tx_rings, sizeof(*nn->tx_rings),
|
|
GFP_KERNEL);
|
|
if (!nn->tx_rings)
|
|
goto err_free_rx_rings;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
|
|
if (err)
|
|
goto err_free_prev_vecs;
|
|
|
|
err = nfp_net_tx_ring_alloc(nn->r_vecs[r].tx_ring, nn->txd_cnt);
|
|
if (err)
|
|
goto err_cleanup_vec_p;
|
|
|
|
err = nfp_net_rx_ring_alloc(nn->r_vecs[r].rx_ring,
|
|
nn->fl_bufsz, nn->rxd_cnt);
|
|
if (err)
|
|
goto err_free_tx_ring_p;
|
|
|
|
err = nfp_net_rx_ring_bufs_alloc(nn, nn->r_vecs[r].rx_ring);
|
|
if (err)
|
|
goto err_flush_rx_ring_p;
|
|
}
|
|
|
|
err = netif_set_real_num_tx_queues(netdev, nn->num_tx_rings);
|
|
if (err)
|
|
goto err_free_rings;
|
|
|
|
err = netif_set_real_num_rx_queues(netdev, nn->num_rx_rings);
|
|
if (err)
|
|
goto err_free_rings;
|
|
|
|
/* Step 2: Configure the NFP
|
|
* - Enable rings from 0 to tx_rings/rx_rings - 1.
|
|
* - Write MAC address (in case it changed)
|
|
* - Set the MTU
|
|
* - Set the Freelist buffer size
|
|
* - Enable the FW
|
|
*/
|
|
err = nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
goto err_free_rings;
|
|
|
|
/* Step 3: Enable for kernel
|
|
* - put some freelist descriptors on each RX ring
|
|
* - enable NAPI on each ring
|
|
* - enable all TX queues
|
|
* - set link state
|
|
*/
|
|
nfp_net_open_stack(nn);
|
|
|
|
return 0;
|
|
|
|
err_free_rings:
|
|
r = nn->num_r_vecs;
|
|
err_free_prev_vecs:
|
|
while (r--) {
|
|
nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring);
|
|
err_flush_rx_ring_p:
|
|
nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring);
|
|
err_free_tx_ring_p:
|
|
nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring);
|
|
err_cleanup_vec_p:
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
}
|
|
kfree(nn->tx_rings);
|
|
err_free_rx_rings:
|
|
kfree(nn->rx_rings);
|
|
err_free_lsc:
|
|
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
|
|
err_free_exn:
|
|
nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_close_stack() - Quiescent the stack (part of close)
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_close_stack(struct nfp_net *nn)
|
|
{
|
|
unsigned int r;
|
|
|
|
disable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
|
|
netif_carrier_off(nn->netdev);
|
|
nn->link_up = false;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
disable_irq(nn->irq_entries[nn->r_vecs[r].irq_idx].vector);
|
|
napi_disable(&nn->r_vecs[r].napi);
|
|
}
|
|
|
|
netif_tx_disable(nn->netdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_close_free_all() - Free all runtime resources
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_close_free_all(struct nfp_net *nn)
|
|
{
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
nfp_net_rx_ring_bufs_free(nn, nn->r_vecs[r].rx_ring);
|
|
nfp_net_rx_ring_free(nn->r_vecs[r].rx_ring);
|
|
nfp_net_tx_ring_free(nn->r_vecs[r].tx_ring);
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
}
|
|
|
|
kfree(nn->rx_rings);
|
|
kfree(nn->tx_rings);
|
|
|
|
nfp_net_aux_irq_free(nn, NFP_NET_CFG_LSC, NFP_NET_IRQ_LSC_IDX);
|
|
nfp_net_aux_irq_free(nn, NFP_NET_CFG_EXN, NFP_NET_IRQ_EXN_IDX);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_netdev_close() - Called when the device is downed
|
|
* @netdev: netdev structure
|
|
*/
|
|
static int nfp_net_netdev_close(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
|
|
if (!(nn->ctrl & NFP_NET_CFG_CTRL_ENABLE)) {
|
|
nn_err(nn, "Dev is not up: 0x%08x\n", nn->ctrl);
|
|
return 0;
|
|
}
|
|
|
|
/* Step 1: Disable RX and TX rings from the Linux kernel perspective
|
|
*/
|
|
nfp_net_close_stack(nn);
|
|
|
|
/* Step 2: Tell NFP
|
|
*/
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
/* Step 3: Free resources
|
|
*/
|
|
nfp_net_close_free_all(nn);
|
|
|
|
nn_dbg(nn, "%s down", netdev->name);
|
|
return 0;
|
|
}
|
|
|
|
static void nfp_net_set_rx_mode(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
u32 new_ctrl;
|
|
|
|
new_ctrl = nn->ctrl;
|
|
|
|
if (netdev->flags & IFF_PROMISC) {
|
|
if (nn->cap & NFP_NET_CFG_CTRL_PROMISC)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_PROMISC;
|
|
else
|
|
nn_warn(nn, "FW does not support promiscuous mode\n");
|
|
} else {
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_PROMISC;
|
|
}
|
|
|
|
if (new_ctrl == nn->ctrl)
|
|
return;
|
|
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
|
|
nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
|
|
|
|
nn->ctrl = new_ctrl;
|
|
}
|
|
|
|
static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
|
|
{
|
|
unsigned int old_mtu, old_fl_bufsz, new_fl_bufsz;
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
struct nfp_net_rx_ring *tmp_rings;
|
|
int err;
|
|
|
|
if (new_mtu < 68 || new_mtu > nn->max_mtu) {
|
|
nn_err(nn, "New MTU (%d) is not valid\n", new_mtu);
|
|
return -EINVAL;
|
|
}
|
|
|
|
old_mtu = netdev->mtu;
|
|
old_fl_bufsz = nn->fl_bufsz;
|
|
new_fl_bufsz = NFP_NET_MAX_PREPEND + ETH_HLEN + VLAN_HLEN * 2 + new_mtu;
|
|
|
|
if (!netif_running(netdev)) {
|
|
netdev->mtu = new_mtu;
|
|
nn->fl_bufsz = new_fl_bufsz;
|
|
return 0;
|
|
}
|
|
|
|
/* Prepare new rings */
|
|
tmp_rings = nfp_net_shadow_rx_rings_prepare(nn, new_fl_bufsz,
|
|
nn->rxd_cnt);
|
|
if (!tmp_rings)
|
|
return -ENOMEM;
|
|
|
|
/* Stop device, swap in new rings, try to start the firmware */
|
|
nfp_net_close_stack(nn);
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings);
|
|
|
|
netdev->mtu = new_mtu;
|
|
nn->fl_bufsz = new_fl_bufsz;
|
|
|
|
err = nfp_net_set_config_and_enable(nn);
|
|
if (err) {
|
|
const int err_new = err;
|
|
|
|
/* Try with old configuration and old rings */
|
|
tmp_rings = nfp_net_shadow_rx_rings_swap(nn, tmp_rings);
|
|
|
|
netdev->mtu = old_mtu;
|
|
nn->fl_bufsz = old_fl_bufsz;
|
|
|
|
err = __nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
nn_err(nn, "Can't restore MTU - FW communication failed (%d,%d)\n",
|
|
err_new, err);
|
|
}
|
|
|
|
nfp_net_shadow_rx_rings_free(nn, tmp_rings);
|
|
|
|
nfp_net_open_stack(nn);
|
|
|
|
return err;
|
|
}
|
|
|
|
int nfp_net_set_ring_size(struct nfp_net *nn, u32 rxd_cnt, u32 txd_cnt)
|
|
{
|
|
struct nfp_net_tx_ring *tx_rings = NULL;
|
|
struct nfp_net_rx_ring *rx_rings = NULL;
|
|
u32 old_rxd_cnt, old_txd_cnt;
|
|
int err;
|
|
|
|
if (!netif_running(nn->netdev)) {
|
|
nn->rxd_cnt = rxd_cnt;
|
|
nn->txd_cnt = txd_cnt;
|
|
return 0;
|
|
}
|
|
|
|
old_rxd_cnt = nn->rxd_cnt;
|
|
old_txd_cnt = nn->txd_cnt;
|
|
|
|
/* Prepare new rings */
|
|
if (nn->rxd_cnt != rxd_cnt) {
|
|
rx_rings = nfp_net_shadow_rx_rings_prepare(nn, nn->fl_bufsz,
|
|
rxd_cnt);
|
|
if (!rx_rings)
|
|
return -ENOMEM;
|
|
}
|
|
if (nn->txd_cnt != txd_cnt) {
|
|
tx_rings = nfp_net_shadow_tx_rings_prepare(nn, txd_cnt);
|
|
if (!tx_rings) {
|
|
nfp_net_shadow_rx_rings_free(nn, rx_rings);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
/* Stop device, swap in new rings, try to start the firmware */
|
|
nfp_net_close_stack(nn);
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
if (rx_rings)
|
|
rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings);
|
|
if (tx_rings)
|
|
tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings);
|
|
|
|
nn->rxd_cnt = rxd_cnt;
|
|
nn->txd_cnt = txd_cnt;
|
|
|
|
err = nfp_net_set_config_and_enable(nn);
|
|
if (err) {
|
|
const int err_new = err;
|
|
|
|
/* Try with old configuration and old rings */
|
|
if (rx_rings)
|
|
rx_rings = nfp_net_shadow_rx_rings_swap(nn, rx_rings);
|
|
if (tx_rings)
|
|
tx_rings = nfp_net_shadow_tx_rings_swap(nn, tx_rings);
|
|
|
|
nn->rxd_cnt = old_rxd_cnt;
|
|
nn->txd_cnt = old_txd_cnt;
|
|
|
|
err = __nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
|
|
err_new, err);
|
|
}
|
|
|
|
nfp_net_shadow_rx_rings_free(nn, rx_rings);
|
|
nfp_net_shadow_tx_rings_free(nn, tx_rings);
|
|
|
|
nfp_net_open_stack(nn);
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct rtnl_link_stats64 *nfp_net_stat64(struct net_device *netdev,
|
|
struct rtnl_link_stats64 *stats)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int r;
|
|
|
|
for (r = 0; r < nn->num_r_vecs; r++) {
|
|
struct nfp_net_r_vector *r_vec = &nn->r_vecs[r];
|
|
u64 data[3];
|
|
unsigned int start;
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin(&r_vec->rx_sync);
|
|
data[0] = r_vec->rx_pkts;
|
|
data[1] = r_vec->rx_bytes;
|
|
data[2] = r_vec->rx_drops;
|
|
} while (u64_stats_fetch_retry(&r_vec->rx_sync, start));
|
|
stats->rx_packets += data[0];
|
|
stats->rx_bytes += data[1];
|
|
stats->rx_dropped += data[2];
|
|
|
|
do {
|
|
start = u64_stats_fetch_begin(&r_vec->tx_sync);
|
|
data[0] = r_vec->tx_pkts;
|
|
data[1] = r_vec->tx_bytes;
|
|
data[2] = r_vec->tx_errors;
|
|
} while (u64_stats_fetch_retry(&r_vec->tx_sync, start));
|
|
stats->tx_packets += data[0];
|
|
stats->tx_bytes += data[1];
|
|
stats->tx_errors += data[2];
|
|
}
|
|
|
|
return stats;
|
|
}
|
|
|
|
static int nfp_net_set_features(struct net_device *netdev,
|
|
netdev_features_t features)
|
|
{
|
|
netdev_features_t changed = netdev->features ^ features;
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
u32 new_ctrl;
|
|
int err;
|
|
|
|
/* Assume this is not called with features we have not advertised */
|
|
|
|
new_ctrl = nn->ctrl;
|
|
|
|
if (changed & NETIF_F_RXCSUM) {
|
|
if (features & NETIF_F_RXCSUM)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_RXCSUM;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM;
|
|
}
|
|
|
|
if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
|
|
if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
|
|
new_ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_TXCSUM;
|
|
}
|
|
|
|
if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
|
|
if (features & (NETIF_F_TSO | NETIF_F_TSO6))
|
|
new_ctrl |= NFP_NET_CFG_CTRL_LSO;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_LSO;
|
|
}
|
|
|
|
if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
|
|
if (features & NETIF_F_HW_VLAN_CTAG_RX)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_RXVLAN;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_RXVLAN;
|
|
}
|
|
|
|
if (changed & NETIF_F_HW_VLAN_CTAG_TX) {
|
|
if (features & NETIF_F_HW_VLAN_CTAG_TX)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_TXVLAN;
|
|
}
|
|
|
|
if (changed & NETIF_F_SG) {
|
|
if (features & NETIF_F_SG)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_GATHER;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_GATHER;
|
|
}
|
|
|
|
nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
|
|
netdev->features, features, changed);
|
|
|
|
if (new_ctrl == nn->ctrl)
|
|
return 0;
|
|
|
|
nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->ctrl, new_ctrl);
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
|
|
err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_GEN);
|
|
if (err)
|
|
return err;
|
|
|
|
nn->ctrl = new_ctrl;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static netdev_features_t
|
|
nfp_net_features_check(struct sk_buff *skb, struct net_device *dev,
|
|
netdev_features_t features)
|
|
{
|
|
u8 l4_hdr;
|
|
|
|
/* We can't do TSO over double tagged packets (802.1AD) */
|
|
features &= vlan_features_check(skb, features);
|
|
|
|
if (!skb->encapsulation)
|
|
return features;
|
|
|
|
/* Ensure that inner L4 header offset fits into TX descriptor field */
|
|
if (skb_is_gso(skb)) {
|
|
u32 hdrlen;
|
|
|
|
hdrlen = skb_inner_transport_header(skb) - skb->data +
|
|
inner_tcp_hdrlen(skb);
|
|
|
|
if (unlikely(hdrlen > NFP_NET_LSO_MAX_HDR_SZ))
|
|
features &= ~NETIF_F_GSO_MASK;
|
|
}
|
|
|
|
/* VXLAN/GRE check */
|
|
switch (vlan_get_protocol(skb)) {
|
|
case htons(ETH_P_IP):
|
|
l4_hdr = ip_hdr(skb)->protocol;
|
|
break;
|
|
case htons(ETH_P_IPV6):
|
|
l4_hdr = ipv6_hdr(skb)->nexthdr;
|
|
break;
|
|
default:
|
|
return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
|
|
}
|
|
|
|
if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
|
|
skb->inner_protocol != htons(ETH_P_TEB) ||
|
|
(l4_hdr != IPPROTO_UDP && l4_hdr != IPPROTO_GRE) ||
|
|
(l4_hdr == IPPROTO_UDP &&
|
|
(skb_inner_mac_header(skb) - skb_transport_header(skb) !=
|
|
sizeof(struct udphdr) + sizeof(struct vxlanhdr))))
|
|
return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
|
|
|
|
return features;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_set_vxlan_port() - set vxlan port in SW and reconfigure HW
|
|
* @nn: NFP Net device to reconfigure
|
|
* @idx: Index into the port table where new port should be written
|
|
* @port: UDP port to configure (pass zero to remove VXLAN port)
|
|
*/
|
|
static void nfp_net_set_vxlan_port(struct nfp_net *nn, int idx, __be16 port)
|
|
{
|
|
int i;
|
|
|
|
nn->vxlan_ports[idx] = port;
|
|
|
|
if (!(nn->ctrl & NFP_NET_CFG_CTRL_VXLAN))
|
|
return;
|
|
|
|
BUILD_BUG_ON(NFP_NET_N_VXLAN_PORTS & 1);
|
|
for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i += 2)
|
|
nn_writel(nn, NFP_NET_CFG_VXLAN_PORT + i * sizeof(port),
|
|
be16_to_cpu(nn->vxlan_ports[i + 1]) << 16 |
|
|
be16_to_cpu(nn->vxlan_ports[i]));
|
|
|
|
nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_VXLAN);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_find_vxlan_idx() - find table entry of the port or a free one
|
|
* @nn: NFP Network structure
|
|
* @port: UDP port to look for
|
|
*
|
|
* Return: if the port is already in the table -- it's position;
|
|
* if the port is not in the table -- free position to use;
|
|
* if the table is full -- -ENOSPC.
|
|
*/
|
|
static int nfp_net_find_vxlan_idx(struct nfp_net *nn, __be16 port)
|
|
{
|
|
int i, free_idx = -ENOSPC;
|
|
|
|
for (i = 0; i < NFP_NET_N_VXLAN_PORTS; i++) {
|
|
if (nn->vxlan_ports[i] == port)
|
|
return i;
|
|
if (!nn->vxlan_usecnt[i])
|
|
free_idx = i;
|
|
}
|
|
|
|
return free_idx;
|
|
}
|
|
|
|
static void nfp_net_add_vxlan_port(struct net_device *netdev,
|
|
struct udp_tunnel_info *ti)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int idx;
|
|
|
|
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
|
|
return;
|
|
|
|
idx = nfp_net_find_vxlan_idx(nn, ti->port);
|
|
if (idx == -ENOSPC)
|
|
return;
|
|
|
|
if (!nn->vxlan_usecnt[idx]++)
|
|
nfp_net_set_vxlan_port(nn, idx, ti->port);
|
|
}
|
|
|
|
static void nfp_net_del_vxlan_port(struct net_device *netdev,
|
|
struct udp_tunnel_info *ti)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int idx;
|
|
|
|
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
|
|
return;
|
|
|
|
idx = nfp_net_find_vxlan_idx(nn, ti->port);
|
|
if (idx == -ENOSPC || !nn->vxlan_usecnt[idx])
|
|
return;
|
|
|
|
if (!--nn->vxlan_usecnt[idx])
|
|
nfp_net_set_vxlan_port(nn, idx, 0);
|
|
}
|
|
|
|
static const struct net_device_ops nfp_net_netdev_ops = {
|
|
.ndo_open = nfp_net_netdev_open,
|
|
.ndo_stop = nfp_net_netdev_close,
|
|
.ndo_start_xmit = nfp_net_tx,
|
|
.ndo_get_stats64 = nfp_net_stat64,
|
|
.ndo_tx_timeout = nfp_net_tx_timeout,
|
|
.ndo_set_rx_mode = nfp_net_set_rx_mode,
|
|
.ndo_change_mtu = nfp_net_change_mtu,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
.ndo_set_features = nfp_net_set_features,
|
|
.ndo_features_check = nfp_net_features_check,
|
|
.ndo_udp_tunnel_add = nfp_net_add_vxlan_port,
|
|
.ndo_udp_tunnel_del = nfp_net_del_vxlan_port,
|
|
};
|
|
|
|
/**
|
|
* nfp_net_info() - Print general info about the NIC
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_info(struct nfp_net *nn)
|
|
{
|
|
nn_info(nn, "Netronome %s %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
|
|
nn->is_nfp3200 ? "NFP-32xx" : "NFP-6xxx",
|
|
nn->is_vf ? "VF " : "",
|
|
nn->num_tx_rings, nn->max_tx_rings,
|
|
nn->num_rx_rings, nn->max_rx_rings);
|
|
nn_info(nn, "VER: %d.%d.%d.%d, Maximum supported MTU: %d\n",
|
|
nn->fw_ver.resv, nn->fw_ver.class,
|
|
nn->fw_ver.major, nn->fw_ver.minor,
|
|
nn->max_mtu);
|
|
nn_info(nn, "CAP: %#x %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
|
|
nn->cap,
|
|
nn->cap & NFP_NET_CFG_CTRL_PROMISC ? "PROMISC " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_L2BC ? "L2BCFILT " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_L2MC ? "L2MCFILT " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_RXCSUM ? "RXCSUM " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_TXCSUM ? "TXCSUM " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_RXVLAN ? "RXVLAN " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_TXVLAN ? "TXVLAN " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_SCATTER ? "SCATTER " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_GATHER ? "GATHER " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_LSO ? "TSO " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_L2SWITCH ? "L2SWITCH " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO ? "AUTOMASK " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_IRQMOD ? "IRQMOD " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_VXLAN ? "VXLAN " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_NVGRE ? "NVGRE " : "");
|
|
}
|
|
|
|
/**
|
|
* nfp_net_netdev_alloc() - Allocate netdev and related structure
|
|
* @pdev: PCI device
|
|
* @max_tx_rings: Maximum number of TX rings supported by device
|
|
* @max_rx_rings: Maximum number of RX rings supported by device
|
|
*
|
|
* This function allocates a netdev device and fills in the initial
|
|
* part of the @struct nfp_net structure.
|
|
*
|
|
* Return: NFP Net device structure, or ERR_PTR on error.
|
|
*/
|
|
struct nfp_net *nfp_net_netdev_alloc(struct pci_dev *pdev,
|
|
int max_tx_rings, int max_rx_rings)
|
|
{
|
|
struct net_device *netdev;
|
|
struct nfp_net *nn;
|
|
int nqs;
|
|
|
|
netdev = alloc_etherdev_mqs(sizeof(struct nfp_net),
|
|
max_tx_rings, max_rx_rings);
|
|
if (!netdev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
SET_NETDEV_DEV(netdev, &pdev->dev);
|
|
nn = netdev_priv(netdev);
|
|
|
|
nn->netdev = netdev;
|
|
nn->pdev = pdev;
|
|
|
|
nn->max_tx_rings = max_tx_rings;
|
|
nn->max_rx_rings = max_rx_rings;
|
|
|
|
nqs = netif_get_num_default_rss_queues();
|
|
nn->num_tx_rings = min_t(int, nqs, max_tx_rings);
|
|
nn->num_rx_rings = min_t(int, nqs, max_rx_rings);
|
|
|
|
nn->txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
|
|
nn->rxd_cnt = NFP_NET_RX_DESCS_DEFAULT;
|
|
|
|
spin_lock_init(&nn->reconfig_lock);
|
|
spin_lock_init(&nn->link_status_lock);
|
|
|
|
setup_timer(&nn->reconfig_timer,
|
|
nfp_net_reconfig_timer, (unsigned long)nn);
|
|
|
|
return nn;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_netdev_free() - Undo what @nfp_net_netdev_alloc() did
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_netdev_free(struct nfp_net *nn)
|
|
{
|
|
free_netdev(nn->netdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rss_init() - Set the initial RSS parameters
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_rss_init(struct nfp_net *nn)
|
|
{
|
|
int i;
|
|
|
|
netdev_rss_key_fill(nn->rss_key, NFP_NET_CFG_RSS_KEY_SZ);
|
|
|
|
for (i = 0; i < sizeof(nn->rss_itbl); i++)
|
|
nn->rss_itbl[i] =
|
|
ethtool_rxfh_indir_default(i, nn->num_rx_rings);
|
|
|
|
/* Enable IPv4/IPv6 TCP by default */
|
|
nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
|
|
NFP_NET_CFG_RSS_IPV6_TCP |
|
|
NFP_NET_CFG_RSS_TOEPLITZ |
|
|
NFP_NET_CFG_RSS_MASK;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_irqmod_init() - Set the initial IRQ moderation parameters
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
static void nfp_net_irqmod_init(struct nfp_net *nn)
|
|
{
|
|
nn->rx_coalesce_usecs = 50;
|
|
nn->rx_coalesce_max_frames = 64;
|
|
nn->tx_coalesce_usecs = 50;
|
|
nn->tx_coalesce_max_frames = 64;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_netdev_init() - Initialise/finalise the netdev structure
|
|
* @netdev: netdev structure
|
|
*
|
|
* Return: 0 on success or negative errno on error.
|
|
*/
|
|
int nfp_net_netdev_init(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int err;
|
|
|
|
/* Get some of the read-only fields from the BAR */
|
|
nn->cap = nn_readl(nn, NFP_NET_CFG_CAP);
|
|
nn->max_mtu = nn_readl(nn, NFP_NET_CFG_MAX_MTU);
|
|
|
|
nfp_net_write_mac_addr(nn);
|
|
|
|
/* Set default MTU and Freelist buffer size */
|
|
if (nn->max_mtu < NFP_NET_DEFAULT_MTU)
|
|
netdev->mtu = nn->max_mtu;
|
|
else
|
|
netdev->mtu = NFP_NET_DEFAULT_MTU;
|
|
nn->fl_bufsz = NFP_NET_DEFAULT_RX_BUFSZ;
|
|
|
|
/* Advertise/enable offloads based on capabilities
|
|
*
|
|
* Note: netdev->features show the currently enabled features
|
|
* and netdev->hw_features advertises which features are
|
|
* supported. By default we enable most features.
|
|
*/
|
|
netdev->hw_features = NETIF_F_HIGHDMA;
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM) {
|
|
netdev->hw_features |= NETIF_F_RXCSUM;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_RXCSUM;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
|
|
netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
|
|
netdev->hw_features |= NETIF_F_SG;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_GATHER;
|
|
}
|
|
if ((nn->cap & NFP_NET_CFG_CTRL_LSO) && nn->fw_ver.major > 2) {
|
|
netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_LSO;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RSS) {
|
|
netdev->hw_features |= NETIF_F_RXHASH;
|
|
nfp_net_rss_init(nn);
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_RSS;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_VXLAN &&
|
|
nn->cap & NFP_NET_CFG_CTRL_NVGRE) {
|
|
if (nn->cap & NFP_NET_CFG_CTRL_LSO)
|
|
netdev->hw_features |= NETIF_F_GSO_GRE |
|
|
NETIF_F_GSO_UDP_TUNNEL;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_VXLAN | NFP_NET_CFG_CTRL_NVGRE;
|
|
|
|
netdev->hw_enc_features = netdev->hw_features;
|
|
}
|
|
|
|
netdev->vlan_features = netdev->hw_features;
|
|
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RXVLAN) {
|
|
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_RXVLAN;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) {
|
|
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
|
|
}
|
|
|
|
netdev->features = netdev->hw_features;
|
|
|
|
/* Advertise but disable TSO by default. */
|
|
netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
|
|
|
|
/* Allow L2 Broadcast and Multicast through by default, if supported */
|
|
if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_L2BC;
|
|
if (nn->cap & NFP_NET_CFG_CTRL_L2MC)
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_L2MC;
|
|
|
|
/* Allow IRQ moderation, if supported */
|
|
if (nn->cap & NFP_NET_CFG_CTRL_IRQMOD) {
|
|
nfp_net_irqmod_init(nn);
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
|
|
}
|
|
|
|
/* On NFP-3200 enable MSI-X auto-masking, if supported and the
|
|
* interrupts are not shared.
|
|
*/
|
|
if (nn->is_nfp3200 && nn->cap & NFP_NET_CFG_CTRL_MSIXAUTO)
|
|
nn->ctrl |= NFP_NET_CFG_CTRL_MSIXAUTO;
|
|
|
|
/* On NFP4000/NFP6000, determine RX packet/metadata boundary offset */
|
|
if (nn->fw_ver.major >= 2)
|
|
nn->rx_offset = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
|
|
else
|
|
nn->rx_offset = NFP_NET_RX_OFFSET;
|
|
|
|
/* Stash the re-configuration queue away. First odd queue in TX Bar */
|
|
nn->qcp_cfg = nn->tx_bar + NFP_QCP_QUEUE_ADDR_SZ;
|
|
|
|
/* Make sure the FW knows the netdev is supposed to be disabled here */
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, 0);
|
|
nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, 0);
|
|
nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, 0);
|
|
err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_RING |
|
|
NFP_NET_CFG_UPDATE_GEN);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Finalise the netdev setup */
|
|
ether_setup(netdev);
|
|
netdev->netdev_ops = &nfp_net_netdev_ops;
|
|
netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
|
|
netif_carrier_off(netdev);
|
|
|
|
nfp_net_set_ethtool_ops(netdev);
|
|
nfp_net_irqs_assign(netdev);
|
|
|
|
return register_netdev(netdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_netdev_clean() - Undo what nfp_net_netdev_init() did.
|
|
* @netdev: netdev structure
|
|
*/
|
|
void nfp_net_netdev_clean(struct net_device *netdev)
|
|
{
|
|
unregister_netdev(netdev);
|
|
}
|