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![David S. Miller](/assets/img/avatar_default.png)
There were quite a few overlapping sets of changes here. Daniel's bug fix for off-by-ones in the new BPF branch instructions, along with the added allowances for "data_end > ptr + x" forms collided with the metadata additions. Along with those three changes came veritifer test cases, which in their final form I tried to group together properly. If I had just trimmed GIT's conflict tags as-is, this would have split up the meta tests unnecessarily. In the socketmap code, a set of preemption disabling changes overlapped with the rename of bpf_compute_data_end() to bpf_compute_data_pointers(). Changes were made to the mv88e6060.c driver set addr method which got removed in net-next. The hyperv transport socket layer had a locking change in 'net' which overlapped with a change of socket state macro usage in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
3821 lines
98 KiB
C
3821 lines
98 KiB
C
/*
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* Copyright (C) 2015-2017 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/bitfield.h>
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#include <linux/bpf.h>
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#include <linux/bpf_trace.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/page_ref.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/vmalloc.h>
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#include <linux/ktime.h>
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#include <net/switchdev.h>
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#include <net/vxlan.h>
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#include "nfpcore/nfp_nsp.h"
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#include "nfp_app.h"
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#include "nfp_net_ctrl.h"
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#include "nfp_net.h"
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#include "nfp_net_sriov.h"
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#include "nfp_port.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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static dma_addr_t nfp_net_dma_map_rx(struct nfp_net_dp *dp, void *frag)
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{
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return dma_map_single_attrs(dp->dev, frag + NFP_NET_RX_BUF_HEADROOM,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
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}
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static void
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nfp_net_dma_sync_dev_rx(const struct nfp_net_dp *dp, dma_addr_t dma_addr)
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{
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dma_sync_single_for_device(dp->dev, dma_addr,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir);
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}
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static void nfp_net_dma_unmap_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr)
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{
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dma_unmap_single_attrs(dp->dev, dma_addr,
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dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA,
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dp->rx_dma_dir, DMA_ATTR_SKIP_CPU_SYNC);
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}
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static void nfp_net_dma_sync_cpu_rx(struct nfp_net_dp *dp, dma_addr_t dma_addr,
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unsigned int len)
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{
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dma_sync_single_for_cpu(dp->dev, dma_addr - NFP_NET_RX_BUF_HEADROOM,
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len, dp->rx_dma_dir);
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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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/**
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* nfp_net_reconfig_mbox() - Reconfigure the firmware via the mailbox
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* @nn: NFP Net device to reconfigure
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* @mbox_cmd: The value for the mailbox command
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*
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* Helper function for mailbox updates
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*
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* Return: Negative errno on error, 0 on success
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*/
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static int nfp_net_reconfig_mbox(struct nfp_net *nn, u32 mbox_cmd)
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{
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int ret;
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nn_writeq(nn, NFP_NET_CFG_MBOX_CMD, mbox_cmd);
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ret = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
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if (ret) {
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nn_err(nn, "Mailbox update error\n");
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return ret;
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}
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return -nn_readl(nn, NFP_NET_CFG_MBOX_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() - 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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* Clear the ICR for the IRQ 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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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_irqs_alloc() - allocates MSI-X irqs
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* @pdev: PCI device structure
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* @irq_entries: Array to be initialized and used to hold the irq entries
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* @min_irqs: Minimal acceptable number of interrupts
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* @wanted_irqs: Target number of interrupts to allocate
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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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unsigned int
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nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries,
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unsigned int min_irqs, unsigned int wanted_irqs)
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{
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unsigned int i;
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int got_irqs;
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for (i = 0; i < wanted_irqs; i++)
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irq_entries[i].entry = i;
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got_irqs = pci_enable_msix_range(pdev, irq_entries,
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min_irqs, wanted_irqs);
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if (got_irqs < 0) {
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dev_err(&pdev->dev, "Failed to enable %d-%d MSI-X (err=%d)\n",
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min_irqs, wanted_irqs, got_irqs);
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return 0;
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}
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|
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if (got_irqs < wanted_irqs)
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dev_warn(&pdev->dev, "Unable to allocate %d IRQs got only %d\n",
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wanted_irqs, got_irqs);
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return got_irqs;
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}
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/**
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* nfp_net_irqs_assign() - Assign interrupts allocated externally to netdev
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* @nn: NFP Network structure
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* @irq_entries: Table of allocated interrupts
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* @n: Size of @irq_entries (number of entries to grab)
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*
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* After interrupts are allocated with nfp_net_irqs_alloc() this function
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* should be called to assign them to a specific netdev (port).
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*/
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void
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nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries,
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unsigned int n)
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{
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struct nfp_net_dp *dp = &nn->dp;
|
|
|
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nn->max_r_vecs = n - NFP_NET_NON_Q_VECTORS;
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dp->num_r_vecs = nn->max_r_vecs;
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|
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memcpy(nn->irq_entries, irq_entries, sizeof(*irq_entries) * n);
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|
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if (dp->num_rx_rings > dp->num_r_vecs ||
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dp->num_tx_rings > dp->num_r_vecs)
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dev_warn(nn->dp.dev, "More rings (%d,%d) than vectors (%d).\n",
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dp->num_rx_rings, dp->num_tx_rings,
|
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dp->num_r_vecs);
|
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|
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dp->num_rx_rings = min(dp->num_r_vecs, dp->num_rx_rings);
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dp->num_tx_rings = min(dp->num_r_vecs, dp->num_tx_rings);
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dp->num_stack_tx_rings = dp->num_tx_rings;
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}
|
|
|
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/**
|
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* nfp_net_irqs_disable() - Disable interrupts
|
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* @pdev: PCI device structure
|
|
*
|
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* Undoes what @nfp_net_irqs_alloc() does.
|
|
*/
|
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void nfp_net_irqs_disable(struct pci_dev *pdev)
|
|
{
|
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pci_disable_msix(pdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_irq_rxtx() - Interrupt service routine for RX/TX rings.
|
|
* @irq: Interrupt
|
|
* @data: Opaque data structure
|
|
*
|
|
* Return: Indicate if the interrupt has been handled.
|
|
*/
|
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static irqreturn_t nfp_net_irq_rxtx(int irq, void *data)
|
|
{
|
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struct nfp_net_r_vector *r_vec = data;
|
|
|
|
napi_schedule_irqoff(&r_vec->napi);
|
|
|
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/* The FW auto-masks any interrupt, either via the MASK bit in
|
|
* the MSI-X table or via the per entry ICR field. So there
|
|
* is no need to disable interrupts here.
|
|
*/
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t nfp_ctrl_irq_rxtx(int irq, void *data)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = data;
|
|
|
|
tasklet_schedule(&r_vec->tasklet);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_read_link_status() - Reread link status from control BAR
|
|
* @nn: NFP Network structure
|
|
*/
|
|
static void nfp_net_read_link_status(struct nfp_net *nn)
|
|
{
|
|
unsigned long flags;
|
|
bool link_up;
|
|
u32 sts;
|
|
|
|
spin_lock_irqsave(&nn->link_status_lock, flags);
|
|
|
|
sts = nn_readl(nn, NFP_NET_CFG_STS);
|
|
link_up = !!(sts & NFP_NET_CFG_STS_LINK);
|
|
|
|
if (nn->link_up == link_up)
|
|
goto out;
|
|
|
|
nn->link_up = link_up;
|
|
if (nn->port)
|
|
set_bit(NFP_PORT_CHANGED, &nn->port->flags);
|
|
|
|
if (nn->link_up) {
|
|
netif_carrier_on(nn->dp.netdev);
|
|
netdev_info(nn->dp.netdev, "NIC Link is Up\n");
|
|
} else {
|
|
netif_carrier_off(nn->dp.netdev);
|
|
netdev_info(nn->dp.netdev, "NIC Link is Down\n");
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&nn->link_status_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_irq_lsc() - Interrupt service routine for link state changes
|
|
* @irq: Interrupt
|
|
* @data: Opaque data structure
|
|
*
|
|
* Return: Indicate if the interrupt has been handled.
|
|
*/
|
|
static irqreturn_t nfp_net_irq_lsc(int irq, void *data)
|
|
{
|
|
struct nfp_net *nn = data;
|
|
struct msix_entry *entry;
|
|
|
|
entry = &nn->irq_entries[NFP_NET_IRQ_LSC_IDX];
|
|
|
|
nfp_net_read_link_status(nn);
|
|
|
|
nfp_net_irq_unmask(nn, entry->entry);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_irq_exn() - Interrupt service routine for exceptions
|
|
* @irq: Interrupt
|
|
* @data: Opaque data structure
|
|
*
|
|
* Return: Indicate if the interrupt has been handled.
|
|
*/
|
|
static irqreturn_t nfp_net_irq_exn(int irq, void *data)
|
|
{
|
|
struct nfp_net *nn = data;
|
|
|
|
nn_err(nn, "%s: UNIMPLEMENTED.\n", __func__);
|
|
/* XXX TO BE IMPLEMENTED */
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_ring_init() - Fill in the boilerplate for a TX ring
|
|
* @tx_ring: TX ring structure
|
|
* @r_vec: IRQ vector servicing this ring
|
|
* @idx: Ring index
|
|
* @is_xdp: Is this an XDP TX ring?
|
|
*/
|
|
static void
|
|
nfp_net_tx_ring_init(struct nfp_net_tx_ring *tx_ring,
|
|
struct nfp_net_r_vector *r_vec, unsigned int idx,
|
|
bool is_xdp)
|
|
{
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
|
|
tx_ring->idx = idx;
|
|
tx_ring->r_vec = r_vec;
|
|
tx_ring->is_xdp = is_xdp;
|
|
u64_stats_init(&tx_ring->r_vec->tx_sync);
|
|
|
|
tx_ring->qcidx = tx_ring->idx * nn->stride_tx;
|
|
tx_ring->qcp_q = nn->tx_bar + NFP_QCP_QUEUE_OFF(tx_ring->qcidx);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_init() - Fill in the boilerplate for a RX ring
|
|
* @rx_ring: RX ring structure
|
|
* @r_vec: IRQ vector servicing this ring
|
|
* @idx: Ring index
|
|
*/
|
|
static void
|
|
nfp_net_rx_ring_init(struct nfp_net_rx_ring *rx_ring,
|
|
struct nfp_net_r_vector *r_vec, unsigned int idx)
|
|
{
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
|
|
rx_ring->idx = idx;
|
|
rx_ring->r_vec = r_vec;
|
|
u64_stats_init(&rx_ring->r_vec->rx_sync);
|
|
|
|
rx_ring->fl_qcidx = rx_ring->idx * nn->stride_rx;
|
|
rx_ring->qcp_fl = nn->rx_bar + NFP_QCP_QUEUE_OFF(rx_ring->fl_qcidx);
|
|
}
|
|
|
|
/**
|
|
* 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, nfp_net_name(nn));
|
|
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, entry->entry);
|
|
|
|
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 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
|
|
* @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_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) {
|
|
txd->l3_offset = skb_network_offset(skb);
|
|
txd->l4_offset = skb_transport_offset(skb);
|
|
hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
|
|
} else {
|
|
txd->l3_offset = skb_inner_network_offset(skb);
|
|
txd->l4_offset = skb_inner_transport_offset(skb);
|
|
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->lso_hdrlen = 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
|
|
* @dp: NFP Net data path struct
|
|
* @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_dp *dp,
|
|
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 (!(dp->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_dp_warn(dp, "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_dp_warn(dp, "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);
|
|
}
|
|
|
|
static void nfp_net_tx_xmit_more_flush(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
wmb();
|
|
nfp_qcp_wr_ptr_add(tx_ring->qcp_q, tx_ring->wr_ptr_add);
|
|
tx_ring->wr_ptr_add = 0;
|
|
}
|
|
|
|
static int nfp_net_prep_port_id(struct sk_buff *skb)
|
|
{
|
|
struct metadata_dst *md_dst = skb_metadata_dst(skb);
|
|
unsigned char *data;
|
|
|
|
if (likely(!md_dst))
|
|
return 0;
|
|
if (unlikely(md_dst->type != METADATA_HW_PORT_MUX))
|
|
return 0;
|
|
|
|
if (unlikely(skb_cow_head(skb, 8)))
|
|
return -ENOMEM;
|
|
|
|
data = skb_push(skb, 8);
|
|
put_unaligned_be32(NFP_NET_META_PORTID, data);
|
|
put_unaligned_be32(md_dst->u.port_info.port_id, data + 4);
|
|
|
|
return 8;
|
|
}
|
|
|
|
/**
|
|
* 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_tx_desc *txd, txdg;
|
|
int f, nr_frags, wr_idx, md_bytes;
|
|
struct nfp_net_tx_ring *tx_ring;
|
|
struct nfp_net_r_vector *r_vec;
|
|
struct nfp_net_tx_buf *txbuf;
|
|
struct netdev_queue *nd_q;
|
|
struct nfp_net_dp *dp;
|
|
dma_addr_t dma_addr;
|
|
unsigned int fsize;
|
|
u16 qidx;
|
|
|
|
dp = &nn->dp;
|
|
qidx = skb_get_queue_mapping(skb);
|
|
tx_ring = &dp->tx_rings[qidx];
|
|
r_vec = tx_ring->r_vec;
|
|
nd_q = netdev_get_tx_queue(dp->netdev, qidx);
|
|
|
|
nr_frags = skb_shinfo(skb)->nr_frags;
|
|
|
|
if (unlikely(nfp_net_tx_full(tx_ring, nr_frags + 1))) {
|
|
nn_dp_warn(dp, "TX ring %d busy. wrp=%u rdp=%u\n",
|
|
qidx, tx_ring->wr_p, tx_ring->rd_p);
|
|
netif_tx_stop_queue(nd_q);
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_busy++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
md_bytes = nfp_net_prep_port_id(skb);
|
|
if (unlikely(md_bytes < 0)) {
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
dev_kfree_skb_any(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* Start with the head skbuf */
|
|
dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb),
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dp->dev, dma_addr))
|
|
goto err_free;
|
|
|
|
wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
|
|
|
|
/* 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) | md_bytes;
|
|
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->lso_hdrlen = 0;
|
|
|
|
/* Do not reorder - tso may adjust pkt cnt, vlan may override fields */
|
|
nfp_net_tx_tso(r_vec, txbuf, txd, skb);
|
|
nfp_net_tx_csum(dp, r_vec, txbuf, txd, skb);
|
|
if (skb_vlan_tag_present(skb) && dp->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(dp->dev, frag, 0,
|
|
fsize, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dp->dev, dma_addr))
|
|
goto err_unmap;
|
|
|
|
wr_idx = D_IDX(tx_ring, wr_idx + 1);
|
|
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);
|
|
|
|
skb_tx_timestamp(skb);
|
|
|
|
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))
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
err_unmap:
|
|
while (--f >= 0) {
|
|
frag = &skb_shinfo(skb)->frags[f];
|
|
dma_unmap_page(dp->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(dp->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_dp_warn(dp, "Failed to map DMA TX buffer\n");
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
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_dp *dp = &r_vec->nfp_net->dp;
|
|
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;
|
|
|
|
if (tx_ring->wr_p == tx_ring->rd_p)
|
|
return;
|
|
|
|
/* 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;
|
|
|
|
todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p);
|
|
|
|
while (todo--) {
|
|
idx = D_IDX(tx_ring, 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(dp->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(dp->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_consume_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);
|
|
|
|
if (!dp->netdev)
|
|
return;
|
|
|
|
nd_q = netdev_get_tx_queue(dp->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);
|
|
}
|
|
|
|
static bool nfp_net_xdp_complete(struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
|
|
u32 done_pkts = 0, done_bytes = 0;
|
|
bool done_all;
|
|
int idx, todo;
|
|
u32 qcp_rd_p;
|
|
|
|
/* 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 true;
|
|
|
|
todo = D_IDX(tx_ring, qcp_rd_p - tx_ring->qcp_rd_p);
|
|
|
|
done_all = todo <= NFP_NET_XDP_MAX_COMPLETE;
|
|
todo = min(todo, NFP_NET_XDP_MAX_COMPLETE);
|
|
|
|
tx_ring->qcp_rd_p = D_IDX(tx_ring, tx_ring->qcp_rd_p + todo);
|
|
|
|
done_pkts = todo;
|
|
while (todo--) {
|
|
idx = D_IDX(tx_ring, tx_ring->rd_p);
|
|
tx_ring->rd_p++;
|
|
|
|
done_bytes += tx_ring->txbufs[idx].real_len;
|
|
}
|
|
|
|
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);
|
|
|
|
WARN_ONCE(tx_ring->wr_p - tx_ring->rd_p > tx_ring->cnt,
|
|
"XDP TX ring corruption rd_p=%u wr_p=%u cnt=%u\n",
|
|
tx_ring->rd_p, tx_ring->wr_p, tx_ring->cnt);
|
|
|
|
return done_all;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_tx_ring_reset() - Free any untransmitted buffers and reset pointers
|
|
* @dp: NFP Net data path struct
|
|
* @tx_ring: TX ring structure
|
|
*
|
|
* Assumes that the device is stopped
|
|
*/
|
|
static void
|
|
nfp_net_tx_ring_reset(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
const struct skb_frag_struct *frag;
|
|
struct netdev_queue *nd_q;
|
|
|
|
while (!tx_ring->is_xdp && tx_ring->rd_p != tx_ring->wr_p) {
|
|
struct nfp_net_tx_buf *tx_buf;
|
|
struct sk_buff *skb;
|
|
int idx, nr_frags;
|
|
|
|
idx = D_IDX(tx_ring, tx_ring->rd_p);
|
|
tx_buf = &tx_ring->txbufs[idx];
|
|
|
|
skb = tx_ring->txbufs[idx].skb;
|
|
nr_frags = skb_shinfo(skb)->nr_frags;
|
|
|
|
if (tx_buf->fidx == -1) {
|
|
/* unmap head */
|
|
dma_unmap_single(dp->dev, tx_buf->dma_addr,
|
|
skb_headlen(skb), DMA_TO_DEVICE);
|
|
} else {
|
|
/* unmap fragment */
|
|
frag = &skb_shinfo(skb)->frags[tx_buf->fidx];
|
|
dma_unmap_page(dp->dev, tx_buf->dma_addr,
|
|
skb_frag_size(frag), DMA_TO_DEVICE);
|
|
}
|
|
|
|
/* check for last gather fragment */
|
|
if (tx_buf->fidx == nr_frags - 1)
|
|
dev_kfree_skb_any(skb);
|
|
|
|
tx_buf->dma_addr = 0;
|
|
tx_buf->skb = NULL;
|
|
tx_buf->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;
|
|
|
|
if (tx_ring->is_xdp || !dp->netdev)
|
|
return;
|
|
|
|
nd_q = netdev_get_tx_queue(dp->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->dp.netdev->real_num_tx_queues; 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
|
|
*/
|
|
static unsigned int
|
|
nfp_net_calc_fl_bufsz(struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int fl_bufsz;
|
|
|
|
fl_bufsz = NFP_NET_RX_BUF_HEADROOM;
|
|
fl_bufsz += dp->rx_dma_off;
|
|
if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
|
|
fl_bufsz += NFP_NET_MAX_PREPEND;
|
|
else
|
|
fl_bufsz += dp->rx_offset;
|
|
fl_bufsz += ETH_HLEN + VLAN_HLEN * 2 + dp->mtu;
|
|
|
|
fl_bufsz = SKB_DATA_ALIGN(fl_bufsz);
|
|
fl_bufsz += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
|
|
|
|
return fl_bufsz;
|
|
}
|
|
|
|
static void
|
|
nfp_net_free_frag(void *frag, bool xdp)
|
|
{
|
|
if (!xdp)
|
|
skb_free_frag(frag);
|
|
else
|
|
__free_page(virt_to_page(frag));
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_alloc_one() - Allocate and map page frag for RX
|
|
* @dp: NFP Net data path struct
|
|
* @dma_addr: Pointer to storage for DMA address (output param)
|
|
*
|
|
* This function will allcate a new page frag, map it for DMA.
|
|
*
|
|
* Return: allocated page frag or NULL on failure.
|
|
*/
|
|
static void *nfp_net_rx_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
|
|
{
|
|
void *frag;
|
|
|
|
if (!dp->xdp_prog) {
|
|
frag = netdev_alloc_frag(dp->fl_bufsz);
|
|
} else {
|
|
struct page *page;
|
|
|
|
page = alloc_page(GFP_KERNEL | __GFP_COLD);
|
|
frag = page ? page_address(page) : NULL;
|
|
}
|
|
if (!frag) {
|
|
nn_dp_warn(dp, "Failed to alloc receive page frag\n");
|
|
return NULL;
|
|
}
|
|
|
|
*dma_addr = nfp_net_dma_map_rx(dp, frag);
|
|
if (dma_mapping_error(dp->dev, *dma_addr)) {
|
|
nfp_net_free_frag(frag, dp->xdp_prog);
|
|
nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
|
|
return NULL;
|
|
}
|
|
|
|
return frag;
|
|
}
|
|
|
|
static void *nfp_net_napi_alloc_one(struct nfp_net_dp *dp, dma_addr_t *dma_addr)
|
|
{
|
|
void *frag;
|
|
|
|
if (!dp->xdp_prog) {
|
|
frag = napi_alloc_frag(dp->fl_bufsz);
|
|
} else {
|
|
struct page *page;
|
|
|
|
page = alloc_page(GFP_ATOMIC | __GFP_COLD);
|
|
frag = page ? page_address(page) : NULL;
|
|
}
|
|
if (!frag) {
|
|
nn_dp_warn(dp, "Failed to alloc receive page frag\n");
|
|
return NULL;
|
|
}
|
|
|
|
*dma_addr = nfp_net_dma_map_rx(dp, frag);
|
|
if (dma_mapping_error(dp->dev, *dma_addr)) {
|
|
nfp_net_free_frag(frag, dp->xdp_prog);
|
|
nn_dp_warn(dp, "Failed to map DMA RX buffer\n");
|
|
return NULL;
|
|
}
|
|
|
|
return frag;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_give_one() - Put mapped skb on the software and hardware rings
|
|
* @dp: NFP Net data path struct
|
|
* @rx_ring: RX ring structure
|
|
* @frag: page fragment buffer
|
|
* @dma_addr: DMA address of skb mapping
|
|
*/
|
|
static void nfp_net_rx_give_one(const struct nfp_net_dp *dp,
|
|
struct nfp_net_rx_ring *rx_ring,
|
|
void *frag, dma_addr_t dma_addr)
|
|
{
|
|
unsigned int wr_idx;
|
|
|
|
wr_idx = D_IDX(rx_ring, rx_ring->wr_p);
|
|
|
|
nfp_net_dma_sync_dev_rx(dp, dma_addr);
|
|
|
|
/* Stash SKB and DMA address away */
|
|
rx_ring->rxbufs[wr_idx].frag = frag;
|
|
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 + dp->rx_dma_off);
|
|
|
|
rx_ring->wr_p++;
|
|
if (!(rx_ring->wr_p % 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, NFP_NET_FL_BATCH);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 = D_IDX(rx_ring, rx_ring->wr_p);
|
|
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].frag = rx_ring->rxbufs[last_idx].frag;
|
|
rx_ring->rxbufs[last_idx].dma_addr = 0;
|
|
rx_ring->rxbufs[last_idx].frag = NULL;
|
|
|
|
memset(rx_ring->rxds, 0, sizeof(*rx_ring->rxds) * rx_ring->cnt);
|
|
rx_ring->wr_p = 0;
|
|
rx_ring->rd_p = 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_bufs_free() - Free any buffers currently on the RX ring
|
|
* @dp: NFP Net data path struct
|
|
* @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_dp *dp,
|
|
struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
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].frag)
|
|
continue;
|
|
|
|
nfp_net_dma_unmap_rx(dp, rx_ring->rxbufs[i].dma_addr);
|
|
nfp_net_free_frag(rx_ring->rxbufs[i].frag, dp->xdp_prog);
|
|
rx_ring->rxbufs[i].dma_addr = 0;
|
|
rx_ring->rxbufs[i].frag = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_bufs_alloc() - Fill RX ring with buffers (don't give to FW)
|
|
* @dp: NFP Net data path struct
|
|
* @rx_ring: RX ring to remove buffers from
|
|
*/
|
|
static int
|
|
nfp_net_rx_ring_bufs_alloc(struct nfp_net_dp *dp,
|
|
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].frag = nfp_net_rx_alloc_one(dp, &rxbufs[i].dma_addr);
|
|
if (!rxbufs[i].frag) {
|
|
nfp_net_rx_ring_bufs_free(dp, rx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rx_ring_fill_freelist() - Give buffers from the ring to FW
|
|
* @dp: NFP Net data path struct
|
|
* @rx_ring: RX ring to fill
|
|
*/
|
|
static void
|
|
nfp_net_rx_ring_fill_freelist(struct nfp_net_dp *dp,
|
|
struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < rx_ring->cnt - 1; i++)
|
|
nfp_net_rx_give_one(dp, rx_ring, rx_ring->rxbufs[i].frag,
|
|
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
|
|
* @dp: NFP Net data path struct
|
|
* @r_vec: per-ring structure
|
|
* @rxd: Pointer to RX descriptor
|
|
* @meta: Parsed metadata prepend
|
|
* @skb: Pointer to SKB
|
|
*/
|
|
static void nfp_net_rx_csum(struct nfp_net_dp *dp,
|
|
struct nfp_net_r_vector *r_vec,
|
|
struct nfp_net_rx_desc *rxd,
|
|
struct nfp_meta_parsed *meta, struct sk_buff *skb)
|
|
{
|
|
skb_checksum_none_assert(skb);
|
|
|
|
if (!(dp->netdev->features & NETIF_F_RXCSUM))
|
|
return;
|
|
|
|
if (meta->csum_type) {
|
|
skb->ip_summed = meta->csum_type;
|
|
skb->csum = meta->csum;
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->hw_csum_rx_ok++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
nfp_net_set_hash(struct net_device *netdev, struct nfp_meta_parsed *meta,
|
|
unsigned int type, __be32 *hash)
|
|
{
|
|
if (!(netdev->features & NETIF_F_RXHASH))
|
|
return;
|
|
|
|
switch (type) {
|
|
case NFP_NET_RSS_IPV4:
|
|
case NFP_NET_RSS_IPV6:
|
|
case NFP_NET_RSS_IPV6_EX:
|
|
meta->hash_type = PKT_HASH_TYPE_L3;
|
|
break;
|
|
default:
|
|
meta->hash_type = PKT_HASH_TYPE_L4;
|
|
break;
|
|
}
|
|
|
|
meta->hash = get_unaligned_be32(hash);
|
|
}
|
|
|
|
static void
|
|
nfp_net_set_hash_desc(struct net_device *netdev, struct nfp_meta_parsed *meta,
|
|
void *data, struct nfp_net_rx_desc *rxd)
|
|
{
|
|
struct nfp_net_rx_hash *rx_hash = data;
|
|
|
|
if (!(rxd->rxd.flags & PCIE_DESC_RX_RSS))
|
|
return;
|
|
|
|
nfp_net_set_hash(netdev, meta, get_unaligned_be32(&rx_hash->hash_type),
|
|
&rx_hash->hash);
|
|
}
|
|
|
|
static void *
|
|
nfp_net_parse_meta(struct net_device *netdev, struct nfp_meta_parsed *meta,
|
|
void *data, int meta_len)
|
|
{
|
|
u32 meta_info;
|
|
|
|
meta_info = get_unaligned_be32(data);
|
|
data += 4;
|
|
|
|
while (meta_info) {
|
|
switch (meta_info & NFP_NET_META_FIELD_MASK) {
|
|
case NFP_NET_META_HASH:
|
|
meta_info >>= NFP_NET_META_FIELD_SIZE;
|
|
nfp_net_set_hash(netdev, meta,
|
|
meta_info & NFP_NET_META_FIELD_MASK,
|
|
(__be32 *)data);
|
|
data += 4;
|
|
break;
|
|
case NFP_NET_META_MARK:
|
|
meta->mark = get_unaligned_be32(data);
|
|
data += 4;
|
|
break;
|
|
case NFP_NET_META_PORTID:
|
|
meta->portid = get_unaligned_be32(data);
|
|
data += 4;
|
|
break;
|
|
case NFP_NET_META_CSUM:
|
|
meta->csum_type = CHECKSUM_COMPLETE;
|
|
meta->csum =
|
|
(__force __wsum)__get_unaligned_cpu32(data);
|
|
data += 4;
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
meta_info >>= NFP_NET_META_FIELD_SIZE;
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void
|
|
nfp_net_rx_drop(const struct nfp_net_dp *dp, struct nfp_net_r_vector *r_vec,
|
|
struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf,
|
|
struct sk_buff *skb)
|
|
{
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->rx_drops++;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
|
|
/* skb is build based on the frag, free_skb() would free the frag
|
|
* so to be able to reuse it we need an extra ref.
|
|
*/
|
|
if (skb && rxbuf && skb->head == rxbuf->frag)
|
|
page_ref_inc(virt_to_head_page(rxbuf->frag));
|
|
if (rxbuf)
|
|
nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag, rxbuf->dma_addr);
|
|
if (skb)
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
static bool
|
|
nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring,
|
|
struct nfp_net_tx_ring *tx_ring,
|
|
struct nfp_net_rx_buf *rxbuf, unsigned int dma_off,
|
|
unsigned int pkt_len, bool *completed)
|
|
{
|
|
struct nfp_net_tx_buf *txbuf;
|
|
struct nfp_net_tx_desc *txd;
|
|
int wr_idx;
|
|
|
|
if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
|
|
if (!*completed) {
|
|
nfp_net_xdp_complete(tx_ring);
|
|
*completed = true;
|
|
}
|
|
|
|
if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
|
|
nfp_net_rx_drop(dp, rx_ring->r_vec, rx_ring, rxbuf,
|
|
NULL);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
|
|
|
|
/* Stash the soft descriptor of the head then initialize it */
|
|
txbuf = &tx_ring->txbufs[wr_idx];
|
|
|
|
nfp_net_rx_give_one(dp, rx_ring, txbuf->frag, txbuf->dma_addr);
|
|
|
|
txbuf->frag = rxbuf->frag;
|
|
txbuf->dma_addr = rxbuf->dma_addr;
|
|
txbuf->fidx = -1;
|
|
txbuf->pkt_cnt = 1;
|
|
txbuf->real_len = pkt_len;
|
|
|
|
dma_sync_single_for_device(dp->dev, rxbuf->dma_addr + dma_off,
|
|
pkt_len, DMA_BIDIRECTIONAL);
|
|
|
|
/* Build TX descriptor */
|
|
txd = &tx_ring->txds[wr_idx];
|
|
txd->offset_eop = PCIE_DESC_TX_EOP;
|
|
txd->dma_len = cpu_to_le16(pkt_len);
|
|
nfp_desc_set_dma_addr(txd, rxbuf->dma_addr + dma_off);
|
|
txd->data_len = cpu_to_le16(pkt_len);
|
|
|
|
txd->flags = 0;
|
|
txd->mss = 0;
|
|
txd->lso_hdrlen = 0;
|
|
|
|
tx_ring->wr_p++;
|
|
tx_ring->wr_ptr_add++;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* 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_dp *dp = &r_vec->nfp_net->dp;
|
|
struct nfp_net_tx_ring *tx_ring;
|
|
struct bpf_prog *xdp_prog;
|
|
bool xdp_tx_cmpl = false;
|
|
unsigned int true_bufsz;
|
|
struct sk_buff *skb;
|
|
int pkts_polled = 0;
|
|
int idx;
|
|
|
|
rcu_read_lock();
|
|
xdp_prog = READ_ONCE(dp->xdp_prog);
|
|
true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz;
|
|
tx_ring = r_vec->xdp_ring;
|
|
|
|
while (pkts_polled < budget) {
|
|
unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off;
|
|
struct nfp_net_rx_buf *rxbuf;
|
|
struct nfp_net_rx_desc *rxd;
|
|
struct nfp_meta_parsed meta;
|
|
struct net_device *netdev;
|
|
dma_addr_t new_dma_addr;
|
|
u32 meta_len_xdp = 0;
|
|
void *new_frag;
|
|
|
|
idx = D_IDX(rx_ring, rx_ring->rd_p);
|
|
|
|
rxd = &rx_ring->rxds[idx];
|
|
if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD))
|
|
break;
|
|
|
|
/* Memory barrier to ensure that we won't do other reads
|
|
* before the DD bit.
|
|
*/
|
|
dma_rmb();
|
|
|
|
memset(&meta, 0, sizeof(meta));
|
|
|
|
rx_ring->rd_p++;
|
|
pkts_polled++;
|
|
|
|
rxbuf = &rx_ring->rxbufs[idx];
|
|
/* < 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);
|
|
pkt_len = data_len - meta_len;
|
|
|
|
pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off;
|
|
if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
|
|
pkt_off += meta_len;
|
|
else
|
|
pkt_off += dp->rx_offset;
|
|
meta_off = pkt_off - meta_len;
|
|
|
|
/* Stats update */
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->rx_pkts++;
|
|
r_vec->rx_bytes += pkt_len;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
|
|
if (unlikely(meta_len > NFP_NET_MAX_PREPEND ||
|
|
(dp->rx_offset && meta_len > dp->rx_offset))) {
|
|
nn_dp_warn(dp, "oversized RX packet metadata %u\n",
|
|
meta_len);
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
|
|
continue;
|
|
}
|
|
|
|
nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off,
|
|
data_len);
|
|
|
|
if (!dp->chained_metadata_format) {
|
|
nfp_net_set_hash_desc(dp->netdev, &meta,
|
|
rxbuf->frag + meta_off, rxd);
|
|
} else if (meta_len) {
|
|
void *end;
|
|
|
|
end = nfp_net_parse_meta(dp->netdev, &meta,
|
|
rxbuf->frag + meta_off,
|
|
meta_len);
|
|
if (unlikely(end != rxbuf->frag + pkt_off)) {
|
|
nn_dp_warn(dp, "invalid RX packet metadata\n");
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf,
|
|
NULL);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (xdp_prog && !(rxd->rxd.flags & PCIE_DESC_RX_BPF &&
|
|
dp->bpf_offload_xdp) && !meta.portid) {
|
|
void *orig_data = rxbuf->frag + pkt_off;
|
|
unsigned int dma_off;
|
|
struct xdp_buff xdp;
|
|
int act;
|
|
|
|
xdp.data_hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM;
|
|
xdp.data = orig_data;
|
|
xdp.data_meta = orig_data;
|
|
xdp.data_end = orig_data + pkt_len;
|
|
|
|
act = bpf_prog_run_xdp(xdp_prog, &xdp);
|
|
|
|
pkt_len -= xdp.data - orig_data;
|
|
pkt_off += xdp.data - orig_data;
|
|
|
|
switch (act) {
|
|
case XDP_PASS:
|
|
meta_len_xdp = xdp.data - xdp.data_meta;
|
|
break;
|
|
case XDP_TX:
|
|
dma_off = pkt_off - NFP_NET_RX_BUF_HEADROOM;
|
|
if (unlikely(!nfp_net_tx_xdp_buf(dp, rx_ring,
|
|
tx_ring, rxbuf,
|
|
dma_off,
|
|
pkt_len,
|
|
&xdp_tx_cmpl)))
|
|
trace_xdp_exception(dp->netdev,
|
|
xdp_prog, act);
|
|
continue;
|
|
default:
|
|
bpf_warn_invalid_xdp_action(act);
|
|
/* fall through */
|
|
case XDP_ABORTED:
|
|
trace_xdp_exception(dp->netdev, xdp_prog, act);
|
|
/* fall through */
|
|
case XDP_DROP:
|
|
nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag,
|
|
rxbuf->dma_addr);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
skb = build_skb(rxbuf->frag, true_bufsz);
|
|
if (unlikely(!skb)) {
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
|
|
continue;
|
|
}
|
|
new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr);
|
|
if (unlikely(!new_frag)) {
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb);
|
|
continue;
|
|
}
|
|
|
|
nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr);
|
|
|
|
nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
|
|
|
|
if (likely(!meta.portid)) {
|
|
netdev = dp->netdev;
|
|
} else {
|
|
struct nfp_net *nn;
|
|
|
|
nn = netdev_priv(dp->netdev);
|
|
netdev = nfp_app_repr_get(nn->app, meta.portid);
|
|
if (unlikely(!netdev)) {
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, NULL, skb);
|
|
continue;
|
|
}
|
|
nfp_repr_inc_rx_stats(netdev, pkt_len);
|
|
}
|
|
|
|
skb_reserve(skb, pkt_off);
|
|
skb_put(skb, pkt_len);
|
|
|
|
skb->mark = meta.mark;
|
|
skb_set_hash(skb, meta.hash, meta.hash_type);
|
|
|
|
skb_record_rx_queue(skb, rx_ring->idx);
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
|
|
nfp_net_rx_csum(dp, r_vec, rxd, &meta, skb);
|
|
|
|
if (rxd->rxd.flags & PCIE_DESC_RX_VLAN)
|
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
|
le16_to_cpu(rxd->rxd.vlan));
|
|
if (meta_len_xdp)
|
|
skb_metadata_set(skb, meta_len_xdp);
|
|
|
|
napi_gro_receive(&rx_ring->r_vec->napi, skb);
|
|
}
|
|
|
|
if (xdp_prog) {
|
|
if (tx_ring->wr_ptr_add)
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
else if (unlikely(tx_ring->wr_p != tx_ring->rd_p) &&
|
|
!xdp_tx_cmpl)
|
|
if (!nfp_net_xdp_complete(tx_ring))
|
|
pkts_polled = budget;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
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);
|
|
unsigned int pkts_polled = 0;
|
|
|
|
if (r_vec->tx_ring)
|
|
nfp_net_tx_complete(r_vec->tx_ring);
|
|
if (r_vec->rx_ring)
|
|
pkts_polled = nfp_net_rx(r_vec->rx_ring, budget);
|
|
|
|
if (pkts_polled < budget)
|
|
if (napi_complete_done(napi, pkts_polled))
|
|
nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry);
|
|
|
|
return pkts_polled;
|
|
}
|
|
|
|
/* Control device data path
|
|
*/
|
|
|
|
static bool
|
|
nfp_ctrl_tx_one(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
struct sk_buff *skb, bool old)
|
|
{
|
|
unsigned int real_len = skb->len, meta_len = 0;
|
|
struct nfp_net_tx_ring *tx_ring;
|
|
struct nfp_net_tx_buf *txbuf;
|
|
struct nfp_net_tx_desc *txd;
|
|
struct nfp_net_dp *dp;
|
|
dma_addr_t dma_addr;
|
|
int wr_idx;
|
|
|
|
dp = &r_vec->nfp_net->dp;
|
|
tx_ring = r_vec->tx_ring;
|
|
|
|
if (WARN_ON_ONCE(skb_shinfo(skb)->nr_frags)) {
|
|
nn_dp_warn(dp, "Driver's CTRL TX does not implement gather\n");
|
|
goto err_free;
|
|
}
|
|
|
|
if (unlikely(nfp_net_tx_full(tx_ring, 1))) {
|
|
u64_stats_update_begin(&r_vec->tx_sync);
|
|
r_vec->tx_busy++;
|
|
u64_stats_update_end(&r_vec->tx_sync);
|
|
if (!old)
|
|
__skb_queue_tail(&r_vec->queue, skb);
|
|
else
|
|
__skb_queue_head(&r_vec->queue, skb);
|
|
return true;
|
|
}
|
|
|
|
if (nfp_app_ctrl_has_meta(nn->app)) {
|
|
if (unlikely(skb_headroom(skb) < 8)) {
|
|
nn_dp_warn(dp, "CTRL TX on skb without headroom\n");
|
|
goto err_free;
|
|
}
|
|
meta_len = 8;
|
|
put_unaligned_be32(NFP_META_PORT_ID_CTRL, skb_push(skb, 4));
|
|
put_unaligned_be32(NFP_NET_META_PORTID, skb_push(skb, 4));
|
|
}
|
|
|
|
/* Start with the head skbuf */
|
|
dma_addr = dma_map_single(dp->dev, skb->data, skb_headlen(skb),
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dp->dev, dma_addr))
|
|
goto err_dma_warn;
|
|
|
|
wr_idx = D_IDX(tx_ring, tx_ring->wr_p);
|
|
|
|
/* 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 = real_len;
|
|
|
|
/* Build TX descriptor */
|
|
txd = &tx_ring->txds[wr_idx];
|
|
txd->offset_eop = meta_len | PCIE_DESC_TX_EOP;
|
|
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->lso_hdrlen = 0;
|
|
|
|
tx_ring->wr_p++;
|
|
tx_ring->wr_ptr_add++;
|
|
nfp_net_tx_xmit_more_flush(tx_ring);
|
|
|
|
return false;
|
|
|
|
err_dma_warn:
|
|
nn_dp_warn(dp, "Failed to DMA map TX CTRL buffer\n");
|
|
err_free:
|
|
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 false;
|
|
}
|
|
|
|
bool nfp_ctrl_tx(struct nfp_net *nn, struct sk_buff *skb)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = &nn->r_vecs[0];
|
|
bool ret;
|
|
|
|
spin_lock_bh(&r_vec->lock);
|
|
ret = nfp_ctrl_tx_one(nn, r_vec, skb, false);
|
|
spin_unlock_bh(&r_vec->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __nfp_ctrl_tx_queued(struct nfp_net_r_vector *r_vec)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
while ((skb = __skb_dequeue(&r_vec->queue)))
|
|
if (nfp_ctrl_tx_one(r_vec->nfp_net, r_vec, skb, true))
|
|
return;
|
|
}
|
|
|
|
static bool
|
|
nfp_ctrl_meta_ok(struct nfp_net *nn, void *data, unsigned int meta_len)
|
|
{
|
|
u32 meta_type, meta_tag;
|
|
|
|
if (!nfp_app_ctrl_has_meta(nn->app))
|
|
return !meta_len;
|
|
|
|
if (meta_len != 8)
|
|
return false;
|
|
|
|
meta_type = get_unaligned_be32(data);
|
|
meta_tag = get_unaligned_be32(data + 4);
|
|
|
|
return (meta_type == NFP_NET_META_PORTID &&
|
|
meta_tag == NFP_META_PORT_ID_CTRL);
|
|
}
|
|
|
|
static bool
|
|
nfp_ctrl_rx_one(struct nfp_net *nn, struct nfp_net_dp *dp,
|
|
struct nfp_net_r_vector *r_vec, struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
unsigned int meta_len, data_len, meta_off, pkt_len, pkt_off;
|
|
struct nfp_net_rx_buf *rxbuf;
|
|
struct nfp_net_rx_desc *rxd;
|
|
dma_addr_t new_dma_addr;
|
|
struct sk_buff *skb;
|
|
void *new_frag;
|
|
int idx;
|
|
|
|
idx = D_IDX(rx_ring, rx_ring->rd_p);
|
|
|
|
rxd = &rx_ring->rxds[idx];
|
|
if (!(rxd->rxd.meta_len_dd & PCIE_DESC_RX_DD))
|
|
return false;
|
|
|
|
/* Memory barrier to ensure that we won't do other reads
|
|
* before the DD bit.
|
|
*/
|
|
dma_rmb();
|
|
|
|
rx_ring->rd_p++;
|
|
|
|
rxbuf = &rx_ring->rxbufs[idx];
|
|
meta_len = rxd->rxd.meta_len_dd & PCIE_DESC_RX_META_LEN_MASK;
|
|
data_len = le16_to_cpu(rxd->rxd.data_len);
|
|
pkt_len = data_len - meta_len;
|
|
|
|
pkt_off = NFP_NET_RX_BUF_HEADROOM + dp->rx_dma_off;
|
|
if (dp->rx_offset == NFP_NET_CFG_RX_OFFSET_DYNAMIC)
|
|
pkt_off += meta_len;
|
|
else
|
|
pkt_off += dp->rx_offset;
|
|
meta_off = pkt_off - meta_len;
|
|
|
|
/* Stats update */
|
|
u64_stats_update_begin(&r_vec->rx_sync);
|
|
r_vec->rx_pkts++;
|
|
r_vec->rx_bytes += pkt_len;
|
|
u64_stats_update_end(&r_vec->rx_sync);
|
|
|
|
nfp_net_dma_sync_cpu_rx(dp, rxbuf->dma_addr + meta_off, data_len);
|
|
|
|
if (unlikely(!nfp_ctrl_meta_ok(nn, rxbuf->frag + meta_off, meta_len))) {
|
|
nn_dp_warn(dp, "incorrect metadata for ctrl packet (%d)\n",
|
|
meta_len);
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
|
|
return true;
|
|
}
|
|
|
|
skb = build_skb(rxbuf->frag, dp->fl_bufsz);
|
|
if (unlikely(!skb)) {
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, NULL);
|
|
return true;
|
|
}
|
|
new_frag = nfp_net_napi_alloc_one(dp, &new_dma_addr);
|
|
if (unlikely(!new_frag)) {
|
|
nfp_net_rx_drop(dp, r_vec, rx_ring, rxbuf, skb);
|
|
return true;
|
|
}
|
|
|
|
nfp_net_dma_unmap_rx(dp, rxbuf->dma_addr);
|
|
|
|
nfp_net_rx_give_one(dp, rx_ring, new_frag, new_dma_addr);
|
|
|
|
skb_reserve(skb, pkt_off);
|
|
skb_put(skb, pkt_len);
|
|
|
|
nfp_app_ctrl_rx(nn->app, skb);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void nfp_ctrl_rx(struct nfp_net_r_vector *r_vec)
|
|
{
|
|
struct nfp_net_rx_ring *rx_ring = r_vec->rx_ring;
|
|
struct nfp_net *nn = r_vec->nfp_net;
|
|
struct nfp_net_dp *dp = &nn->dp;
|
|
|
|
while (nfp_ctrl_rx_one(nn, dp, r_vec, rx_ring))
|
|
continue;
|
|
}
|
|
|
|
static void nfp_ctrl_poll(unsigned long arg)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = (void *)arg;
|
|
|
|
spin_lock_bh(&r_vec->lock);
|
|
nfp_net_tx_complete(r_vec->tx_ring);
|
|
__nfp_ctrl_tx_queued(r_vec);
|
|
spin_unlock_bh(&r_vec->lock);
|
|
|
|
nfp_ctrl_rx(r_vec);
|
|
|
|
nfp_net_irq_unmask(r_vec->nfp_net, r_vec->irq_entry);
|
|
}
|
|
|
|
/* Setup and Configuration
|
|
*/
|
|
|
|
/**
|
|
* nfp_net_vecs_init() - Assign IRQs and setup rvecs.
|
|
* @nn: NFP Network structure
|
|
*/
|
|
static void nfp_net_vecs_init(struct nfp_net *nn)
|
|
{
|
|
struct nfp_net_r_vector *r_vec;
|
|
int r;
|
|
|
|
nn->lsc_handler = nfp_net_irq_lsc;
|
|
nn->exn_handler = nfp_net_irq_exn;
|
|
|
|
for (r = 0; r < nn->max_r_vecs; r++) {
|
|
struct msix_entry *entry;
|
|
|
|
entry = &nn->irq_entries[NFP_NET_NON_Q_VECTORS + r];
|
|
|
|
r_vec = &nn->r_vecs[r];
|
|
r_vec->nfp_net = nn;
|
|
r_vec->irq_entry = entry->entry;
|
|
r_vec->irq_vector = entry->vector;
|
|
|
|
if (nn->dp.netdev) {
|
|
r_vec->handler = nfp_net_irq_rxtx;
|
|
} else {
|
|
r_vec->handler = nfp_ctrl_irq_rxtx;
|
|
|
|
__skb_queue_head_init(&r_vec->queue);
|
|
spin_lock_init(&r_vec->lock);
|
|
tasklet_init(&r_vec->tasklet, nfp_ctrl_poll,
|
|
(unsigned long)r_vec);
|
|
tasklet_disable(&r_vec->tasklet);
|
|
}
|
|
|
|
cpumask_set_cpu(r, &r_vec->affinity_mask);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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_dp *dp = &r_vec->nfp_net->dp;
|
|
|
|
kfree(tx_ring->txbufs);
|
|
|
|
if (tx_ring->txds)
|
|
dma_free_coherent(dp->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
|
|
* @dp: NFP Net data path struct
|
|
* @tx_ring: TX Ring structure to allocate
|
|
*
|
|
* Return: 0 on success, negative errno otherwise.
|
|
*/
|
|
static int
|
|
nfp_net_tx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
struct nfp_net_r_vector *r_vec = tx_ring->r_vec;
|
|
int sz;
|
|
|
|
tx_ring->cnt = dp->txd_cnt;
|
|
|
|
tx_ring->size = sizeof(*tx_ring->txds) * tx_ring->cnt;
|
|
tx_ring->txds = dma_zalloc_coherent(dp->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;
|
|
|
|
if (!tx_ring->is_xdp && dp->netdev)
|
|
netif_set_xps_queue(dp->netdev, &r_vec->affinity_mask,
|
|
tx_ring->idx);
|
|
|
|
return 0;
|
|
|
|
err_alloc:
|
|
nfp_net_tx_ring_free(tx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void
|
|
nfp_net_tx_ring_bufs_free(struct nfp_net_dp *dp,
|
|
struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (!tx_ring->is_xdp)
|
|
return;
|
|
|
|
for (i = 0; i < tx_ring->cnt; i++) {
|
|
if (!tx_ring->txbufs[i].frag)
|
|
return;
|
|
|
|
nfp_net_dma_unmap_rx(dp, tx_ring->txbufs[i].dma_addr);
|
|
__free_page(virt_to_page(tx_ring->txbufs[i].frag));
|
|
}
|
|
}
|
|
|
|
static int
|
|
nfp_net_tx_ring_bufs_alloc(struct nfp_net_dp *dp,
|
|
struct nfp_net_tx_ring *tx_ring)
|
|
{
|
|
struct nfp_net_tx_buf *txbufs = tx_ring->txbufs;
|
|
unsigned int i;
|
|
|
|
if (!tx_ring->is_xdp)
|
|
return 0;
|
|
|
|
for (i = 0; i < tx_ring->cnt; i++) {
|
|
txbufs[i].frag = nfp_net_rx_alloc_one(dp, &txbufs[i].dma_addr);
|
|
if (!txbufs[i].frag) {
|
|
nfp_net_tx_ring_bufs_free(dp, tx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfp_net_tx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int r;
|
|
|
|
dp->tx_rings = kcalloc(dp->num_tx_rings, sizeof(*dp->tx_rings),
|
|
GFP_KERNEL);
|
|
if (!dp->tx_rings)
|
|
return -ENOMEM;
|
|
|
|
for (r = 0; r < dp->num_tx_rings; r++) {
|
|
int bias = 0;
|
|
|
|
if (r >= dp->num_stack_tx_rings)
|
|
bias = dp->num_stack_tx_rings;
|
|
|
|
nfp_net_tx_ring_init(&dp->tx_rings[r], &nn->r_vecs[r - bias],
|
|
r, bias);
|
|
|
|
if (nfp_net_tx_ring_alloc(dp, &dp->tx_rings[r]))
|
|
goto err_free_prev;
|
|
|
|
if (nfp_net_tx_ring_bufs_alloc(dp, &dp->tx_rings[r]))
|
|
goto err_free_ring;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_free_prev:
|
|
while (r--) {
|
|
nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]);
|
|
err_free_ring:
|
|
nfp_net_tx_ring_free(&dp->tx_rings[r]);
|
|
}
|
|
kfree(dp->tx_rings);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void nfp_net_tx_rings_free(struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < dp->num_tx_rings; r++) {
|
|
nfp_net_tx_ring_bufs_free(dp, &dp->tx_rings[r]);
|
|
nfp_net_tx_ring_free(&dp->tx_rings[r]);
|
|
}
|
|
|
|
kfree(dp->tx_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_dp *dp = &r_vec->nfp_net->dp;
|
|
|
|
kfree(rx_ring->rxbufs);
|
|
|
|
if (rx_ring->rxds)
|
|
dma_free_coherent(dp->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
|
|
* @dp: NFP Net data path struct
|
|
* @rx_ring: RX ring to allocate
|
|
*
|
|
* Return: 0 on success, negative errno otherwise.
|
|
*/
|
|
static int
|
|
nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
|
|
{
|
|
int sz;
|
|
|
|
rx_ring->cnt = dp->rxd_cnt;
|
|
rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;
|
|
rx_ring->rxds = dma_zalloc_coherent(dp->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;
|
|
|
|
return 0;
|
|
|
|
err_alloc:
|
|
nfp_net_rx_ring_free(rx_ring);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int nfp_net_rx_rings_prepare(struct nfp_net *nn, struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int r;
|
|
|
|
dp->rx_rings = kcalloc(dp->num_rx_rings, sizeof(*dp->rx_rings),
|
|
GFP_KERNEL);
|
|
if (!dp->rx_rings)
|
|
return -ENOMEM;
|
|
|
|
for (r = 0; r < dp->num_rx_rings; r++) {
|
|
nfp_net_rx_ring_init(&dp->rx_rings[r], &nn->r_vecs[r], r);
|
|
|
|
if (nfp_net_rx_ring_alloc(dp, &dp->rx_rings[r]))
|
|
goto err_free_prev;
|
|
|
|
if (nfp_net_rx_ring_bufs_alloc(dp, &dp->rx_rings[r]))
|
|
goto err_free_ring;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_free_prev:
|
|
while (r--) {
|
|
nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]);
|
|
err_free_ring:
|
|
nfp_net_rx_ring_free(&dp->rx_rings[r]);
|
|
}
|
|
kfree(dp->rx_rings);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void nfp_net_rx_rings_free(struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int r;
|
|
|
|
for (r = 0; r < dp->num_rx_rings; r++) {
|
|
nfp_net_rx_ring_bufs_free(dp, &dp->rx_rings[r]);
|
|
nfp_net_rx_ring_free(&dp->rx_rings[r]);
|
|
}
|
|
|
|
kfree(dp->rx_rings);
|
|
}
|
|
|
|
static void
|
|
nfp_net_vector_assign_rings(struct nfp_net_dp *dp,
|
|
struct nfp_net_r_vector *r_vec, int idx)
|
|
{
|
|
r_vec->rx_ring = idx < dp->num_rx_rings ? &dp->rx_rings[idx] : NULL;
|
|
r_vec->tx_ring =
|
|
idx < dp->num_stack_tx_rings ? &dp->tx_rings[idx] : NULL;
|
|
|
|
r_vec->xdp_ring = idx < dp->num_tx_rings - dp->num_stack_tx_rings ?
|
|
&dp->tx_rings[dp->num_stack_tx_rings + idx] : NULL;
|
|
}
|
|
|
|
static int
|
|
nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
|
|
int idx)
|
|
{
|
|
int err;
|
|
|
|
/* Setup NAPI */
|
|
if (nn->dp.netdev)
|
|
netif_napi_add(nn->dp.netdev, &r_vec->napi,
|
|
nfp_net_poll, NAPI_POLL_WEIGHT);
|
|
else
|
|
tasklet_enable(&r_vec->tasklet);
|
|
|
|
snprintf(r_vec->name, sizeof(r_vec->name),
|
|
"%s-rxtx-%d", nfp_net_name(nn), idx);
|
|
err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name,
|
|
r_vec);
|
|
if (err) {
|
|
if (nn->dp.netdev)
|
|
netif_napi_del(&r_vec->napi);
|
|
else
|
|
tasklet_disable(&r_vec->tasklet);
|
|
|
|
nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector);
|
|
return err;
|
|
}
|
|
disable_irq(r_vec->irq_vector);
|
|
|
|
irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);
|
|
|
|
nn_dbg(nn, "RV%02d: irq=%03d/%03d\n", idx, r_vec->irq_vector,
|
|
r_vec->irq_entry);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
nfp_net_cleanup_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec)
|
|
{
|
|
irq_set_affinity_hint(r_vec->irq_vector, NULL);
|
|
if (nn->dp.netdev)
|
|
netif_napi_del(&r_vec->napi);
|
|
else
|
|
tasklet_disable(&r_vec->tasklet);
|
|
|
|
free_irq(r_vec->irq_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_rss_key_sz(nn); 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->dp.num_rx_rings; 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->dp.num_tx_rings; 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
|
|
* @addr: MAC address to write
|
|
*
|
|
* 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, const u8 *addr)
|
|
{
|
|
nn_writel(nn, NFP_NET_CFG_MACADDR + 0, get_unaligned_be32(addr));
|
|
nn_writew(nn, NFP_NET_CFG_MACADDR + 6, get_unaligned_be16(addr + 4));
|
|
}
|
|
|
|
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->dp.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->dp.num_rx_rings; r++)
|
|
nfp_net_rx_ring_reset(&nn->dp.rx_rings[r]);
|
|
for (r = 0; r < nn->dp.num_tx_rings; r++)
|
|
nfp_net_tx_ring_reset(&nn->dp, &nn->dp.tx_rings[r]);
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++)
|
|
nfp_net_vec_clear_ring_data(nn, r);
|
|
|
|
nn->dp.ctrl = new_ctrl;
|
|
}
|
|
|
|
static void
|
|
nfp_net_rx_ring_hw_cfg_write(struct nfp_net *nn,
|
|
struct nfp_net_rx_ring *rx_ring, unsigned int idx)
|
|
{
|
|
/* Write the DMA address, size and MSI-X info to the device */
|
|
nn_writeq(nn, NFP_NET_CFG_RXR_ADDR(idx), rx_ring->dma);
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_SZ(idx), ilog2(rx_ring->cnt));
|
|
nn_writeb(nn, NFP_NET_CFG_RXR_VEC(idx), rx_ring->r_vec->irq_entry);
|
|
}
|
|
|
|
static void
|
|
nfp_net_tx_ring_hw_cfg_write(struct nfp_net *nn,
|
|
struct nfp_net_tx_ring *tx_ring, unsigned int idx)
|
|
{
|
|
nn_writeq(nn, NFP_NET_CFG_TXR_ADDR(idx), tx_ring->dma);
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_SZ(idx), ilog2(tx_ring->cnt));
|
|
nn_writeb(nn, NFP_NET_CFG_TXR_VEC(idx), tx_ring->r_vec->irq_entry);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
u32 bufsz, new_ctrl, update = 0;
|
|
unsigned int r;
|
|
int err;
|
|
|
|
new_ctrl = nn->dp.ctrl;
|
|
|
|
if (nn->dp.ctrl & NFP_NET_CFG_CTRL_RSS_ANY) {
|
|
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->dp.ctrl & NFP_NET_CFG_CTRL_IRQMOD) {
|
|
nfp_net_coalesce_write_cfg(nn);
|
|
update |= NFP_NET_CFG_UPDATE_IRQMOD;
|
|
}
|
|
|
|
for (r = 0; r < nn->dp.num_tx_rings; r++)
|
|
nfp_net_tx_ring_hw_cfg_write(nn, &nn->dp.tx_rings[r], r);
|
|
for (r = 0; r < nn->dp.num_rx_rings; r++)
|
|
nfp_net_rx_ring_hw_cfg_write(nn, &nn->dp.rx_rings[r], r);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_TXRS_ENABLE, nn->dp.num_tx_rings == 64 ?
|
|
0xffffffffffffffffULL : ((u64)1 << nn->dp.num_tx_rings) - 1);
|
|
|
|
nn_writeq(nn, NFP_NET_CFG_RXRS_ENABLE, nn->dp.num_rx_rings == 64 ?
|
|
0xffffffffffffffffULL : ((u64)1 << nn->dp.num_rx_rings) - 1);
|
|
|
|
if (nn->dp.netdev)
|
|
nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
|
|
|
|
nn_writel(nn, NFP_NET_CFG_MTU, nn->dp.mtu);
|
|
|
|
bufsz = nn->dp.fl_bufsz - nn->dp.rx_dma_off - NFP_NET_RX_BUF_NON_DATA;
|
|
nn_writel(nn, NFP_NET_CFG_FLBUFSZ, 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);
|
|
if (err) {
|
|
nfp_net_clear_config_and_disable(nn);
|
|
return err;
|
|
}
|
|
|
|
nn->dp.ctrl = new_ctrl;
|
|
|
|
for (r = 0; r < nn->dp.num_rx_rings; r++)
|
|
nfp_net_rx_ring_fill_freelist(&nn->dp, &nn->dp.rx_rings[r]);
|
|
|
|
/* Since reconfiguration requests while NFP is down are ignored we
|
|
* have to wipe the entire VXLAN configuration and reinitialize it.
|
|
*/
|
|
if (nn->dp.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->dp.netdev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* nfp_net_close_stack() - Quiesce 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->dp.netdev);
|
|
nn->link_up = false;
|
|
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++) {
|
|
disable_irq(nn->r_vecs[r].irq_vector);
|
|
napi_disable(&nn->r_vecs[r].napi);
|
|
}
|
|
|
|
netif_tx_disable(nn->dp.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;
|
|
|
|
nfp_net_tx_rings_free(&nn->dp);
|
|
nfp_net_rx_rings_free(&nn->dp);
|
|
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++)
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
|
|
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);
|
|
|
|
/* 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);
|
|
nfp_port_configure(netdev, false);
|
|
|
|
/* Step 3: Free resources
|
|
*/
|
|
nfp_net_close_free_all(nn);
|
|
|
|
nn_dbg(nn, "%s down", netdev->name);
|
|
return 0;
|
|
}
|
|
|
|
void nfp_ctrl_close(struct nfp_net *nn)
|
|
{
|
|
int r;
|
|
|
|
rtnl_lock();
|
|
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++) {
|
|
disable_irq(nn->r_vecs[r].irq_vector);
|
|
tasklet_disable(&nn->r_vecs[r].tasklet);
|
|
}
|
|
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
nfp_net_close_free_all(nn);
|
|
|
|
rtnl_unlock();
|
|
}
|
|
|
|
/**
|
|
* 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->dp.num_r_vecs; r++) {
|
|
napi_enable(&nn->r_vecs[r].napi);
|
|
enable_irq(nn->r_vecs[r].irq_vector);
|
|
}
|
|
|
|
netif_tx_wake_all_queues(nn->dp.netdev);
|
|
|
|
enable_irq(nn->irq_entries[NFP_NET_IRQ_LSC_IDX].vector);
|
|
nfp_net_read_link_status(nn);
|
|
}
|
|
|
|
static int nfp_net_open_alloc_all(struct nfp_net *nn)
|
|
{
|
|
int err, r;
|
|
|
|
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);
|
|
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++) {
|
|
err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
|
|
if (err)
|
|
goto err_cleanup_vec_p;
|
|
}
|
|
|
|
err = nfp_net_rx_rings_prepare(nn, &nn->dp);
|
|
if (err)
|
|
goto err_cleanup_vec;
|
|
|
|
err = nfp_net_tx_rings_prepare(nn, &nn->dp);
|
|
if (err)
|
|
goto err_free_rx_rings;
|
|
|
|
for (r = 0; r < nn->max_r_vecs; r++)
|
|
nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
|
|
|
|
return 0;
|
|
|
|
err_free_rx_rings:
|
|
nfp_net_rx_rings_free(&nn->dp);
|
|
err_cleanup_vec:
|
|
r = nn->dp.num_r_vecs;
|
|
err_cleanup_vec_p:
|
|
while (r--)
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
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;
|
|
}
|
|
|
|
static int nfp_net_netdev_open(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
int err;
|
|
|
|
/* Step 1: Allocate resources for rings and the like
|
|
* - Request interrupts
|
|
* - Allocate RX and TX ring resources
|
|
* - Setup initial RSS table
|
|
*/
|
|
err = nfp_net_open_alloc_all(nn);
|
|
if (err)
|
|
return err;
|
|
|
|
err = netif_set_real_num_tx_queues(netdev, nn->dp.num_stack_tx_rings);
|
|
if (err)
|
|
goto err_free_all;
|
|
|
|
err = netif_set_real_num_rx_queues(netdev, nn->dp.num_rx_rings);
|
|
if (err)
|
|
goto err_free_all;
|
|
|
|
/* Step 2: Configure the NFP
|
|
* - Ifup the physical interface if it exists
|
|
* - 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_port_configure(netdev, true);
|
|
if (err)
|
|
goto err_free_all;
|
|
|
|
err = nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
goto err_port_disable;
|
|
|
|
/* 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_port_disable:
|
|
nfp_port_configure(netdev, false);
|
|
err_free_all:
|
|
nfp_net_close_free_all(nn);
|
|
return err;
|
|
}
|
|
|
|
int nfp_ctrl_open(struct nfp_net *nn)
|
|
{
|
|
int err, r;
|
|
|
|
/* ring dumping depends on vNICs being opened/closed under rtnl */
|
|
rtnl_lock();
|
|
|
|
err = nfp_net_open_alloc_all(nn);
|
|
if (err)
|
|
goto err_unlock;
|
|
|
|
err = nfp_net_set_config_and_enable(nn);
|
|
if (err)
|
|
goto err_free_all;
|
|
|
|
for (r = 0; r < nn->dp.num_r_vecs; r++)
|
|
enable_irq(nn->r_vecs[r].irq_vector);
|
|
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
|
|
err_free_all:
|
|
nfp_net_close_free_all(nn);
|
|
err_unlock:
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
static void nfp_net_set_rx_mode(struct net_device *netdev)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
u32 new_ctrl;
|
|
|
|
new_ctrl = nn->dp.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->dp.ctrl)
|
|
return;
|
|
|
|
nn_writel(nn, NFP_NET_CFG_CTRL, new_ctrl);
|
|
nfp_net_reconfig_post(nn, NFP_NET_CFG_UPDATE_GEN);
|
|
|
|
nn->dp.ctrl = new_ctrl;
|
|
}
|
|
|
|
static void nfp_net_rss_init_itbl(struct nfp_net *nn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(nn->rss_itbl); i++)
|
|
nn->rss_itbl[i] =
|
|
ethtool_rxfh_indir_default(i, nn->dp.num_rx_rings);
|
|
}
|
|
|
|
static void nfp_net_dp_swap(struct nfp_net *nn, struct nfp_net_dp *dp)
|
|
{
|
|
struct nfp_net_dp new_dp = *dp;
|
|
|
|
*dp = nn->dp;
|
|
nn->dp = new_dp;
|
|
|
|
nn->dp.netdev->mtu = new_dp.mtu;
|
|
|
|
if (!netif_is_rxfh_configured(nn->dp.netdev))
|
|
nfp_net_rss_init_itbl(nn);
|
|
}
|
|
|
|
static int nfp_net_dp_swap_enable(struct nfp_net *nn, struct nfp_net_dp *dp)
|
|
{
|
|
unsigned int r;
|
|
int err;
|
|
|
|
nfp_net_dp_swap(nn, dp);
|
|
|
|
for (r = 0; r < nn->max_r_vecs; r++)
|
|
nfp_net_vector_assign_rings(&nn->dp, &nn->r_vecs[r], r);
|
|
|
|
err = netif_set_real_num_rx_queues(nn->dp.netdev, nn->dp.num_rx_rings);
|
|
if (err)
|
|
return err;
|
|
|
|
if (nn->dp.netdev->real_num_tx_queues != nn->dp.num_stack_tx_rings) {
|
|
err = netif_set_real_num_tx_queues(nn->dp.netdev,
|
|
nn->dp.num_stack_tx_rings);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return nfp_net_set_config_and_enable(nn);
|
|
}
|
|
|
|
struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn)
|
|
{
|
|
struct nfp_net_dp *new;
|
|
|
|
new = kmalloc(sizeof(*new), GFP_KERNEL);
|
|
if (!new)
|
|
return NULL;
|
|
|
|
*new = nn->dp;
|
|
|
|
/* Clear things which need to be recomputed */
|
|
new->fl_bufsz = 0;
|
|
new->tx_rings = NULL;
|
|
new->rx_rings = NULL;
|
|
new->num_r_vecs = 0;
|
|
new->num_stack_tx_rings = 0;
|
|
|
|
return new;
|
|
}
|
|
|
|
static int
|
|
nfp_net_check_config(struct nfp_net *nn, struct nfp_net_dp *dp,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
/* XDP-enabled tests */
|
|
if (!dp->xdp_prog)
|
|
return 0;
|
|
if (dp->fl_bufsz > PAGE_SIZE) {
|
|
NL_SET_ERR_MSG_MOD(extack, "MTU too large w/ XDP enabled");
|
|
return -EINVAL;
|
|
}
|
|
if (dp->num_tx_rings > nn->max_tx_rings) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Insufficient number of TX rings w/ XDP enabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *dp,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int r, err;
|
|
|
|
dp->fl_bufsz = nfp_net_calc_fl_bufsz(dp);
|
|
|
|
dp->num_stack_tx_rings = dp->num_tx_rings;
|
|
if (dp->xdp_prog)
|
|
dp->num_stack_tx_rings -= dp->num_rx_rings;
|
|
|
|
dp->num_r_vecs = max(dp->num_rx_rings, dp->num_stack_tx_rings);
|
|
|
|
err = nfp_net_check_config(nn, dp, extack);
|
|
if (err)
|
|
goto exit_free_dp;
|
|
|
|
if (!netif_running(dp->netdev)) {
|
|
nfp_net_dp_swap(nn, dp);
|
|
err = 0;
|
|
goto exit_free_dp;
|
|
}
|
|
|
|
/* Prepare new rings */
|
|
for (r = nn->dp.num_r_vecs; r < dp->num_r_vecs; r++) {
|
|
err = nfp_net_prepare_vector(nn, &nn->r_vecs[r], r);
|
|
if (err) {
|
|
dp->num_r_vecs = r;
|
|
goto err_cleanup_vecs;
|
|
}
|
|
}
|
|
|
|
err = nfp_net_rx_rings_prepare(nn, dp);
|
|
if (err)
|
|
goto err_cleanup_vecs;
|
|
|
|
err = nfp_net_tx_rings_prepare(nn, dp);
|
|
if (err)
|
|
goto err_free_rx;
|
|
|
|
/* Stop device, swap in new rings, try to start the firmware */
|
|
nfp_net_close_stack(nn);
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
err = nfp_net_dp_swap_enable(nn, dp);
|
|
if (err) {
|
|
int err2;
|
|
|
|
nfp_net_clear_config_and_disable(nn);
|
|
|
|
/* Try with old configuration and old rings */
|
|
err2 = nfp_net_dp_swap_enable(nn, dp);
|
|
if (err2)
|
|
nn_err(nn, "Can't restore ring config - FW communication failed (%d,%d)\n",
|
|
err, err2);
|
|
}
|
|
for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
|
|
nfp_net_rx_rings_free(dp);
|
|
nfp_net_tx_rings_free(dp);
|
|
|
|
nfp_net_open_stack(nn);
|
|
exit_free_dp:
|
|
kfree(dp);
|
|
|
|
return err;
|
|
|
|
err_free_rx:
|
|
nfp_net_rx_rings_free(dp);
|
|
err_cleanup_vecs:
|
|
for (r = dp->num_r_vecs - 1; r >= nn->dp.num_r_vecs; r--)
|
|
nfp_net_cleanup_vector(nn, &nn->r_vecs[r]);
|
|
kfree(dp);
|
|
return err;
|
|
}
|
|
|
|
static int nfp_net_change_mtu(struct net_device *netdev, int new_mtu)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
struct nfp_net_dp *dp;
|
|
|
|
dp = nfp_net_clone_dp(nn);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
|
|
dp->mtu = new_mtu;
|
|
|
|
return nfp_net_ring_reconfig(nn, dp, NULL);
|
|
}
|
|
|
|
static int
|
|
nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
|
|
/* Priority tagged packets with vlan id 0 are processed by the
|
|
* NFP as untagged packets
|
|
*/
|
|
if (!vid)
|
|
return 0;
|
|
|
|
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid);
|
|
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q);
|
|
|
|
return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD);
|
|
}
|
|
|
|
static int
|
|
nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
|
|
/* Priority tagged packets with vlan id 0 are processed by the
|
|
* NFP as untagged packets
|
|
*/
|
|
if (!vid)
|
|
return 0;
|
|
|
|
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid);
|
|
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q);
|
|
|
|
return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL);
|
|
}
|
|
|
|
static void 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->dp.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];
|
|
}
|
|
}
|
|
|
|
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->dp.ctrl;
|
|
|
|
if (changed & NETIF_F_RXCSUM) {
|
|
if (features & NETIF_F_RXCSUM)
|
|
new_ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_RXCSUM_ANY;
|
|
}
|
|
|
|
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 |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
|
|
NFP_NET_CFG_CTRL_LSO;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
|
|
}
|
|
|
|
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_HW_VLAN_CTAG_FILTER) {
|
|
if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
|
|
new_ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
|
|
else
|
|
new_ctrl &= ~NFP_NET_CFG_CTRL_CTAG_FILTER;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (changed & NETIF_F_HW_TC && nfp_app_tc_busy(nn->app, nn)) {
|
|
nn_err(nn, "Cannot disable HW TC offload while in use\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
nn_dbg(nn, "Feature change 0x%llx -> 0x%llx (changed=0x%llx)\n",
|
|
netdev->features, features, changed);
|
|
|
|
if (new_ctrl == nn->dp.ctrl)
|
|
return 0;
|
|
|
|
nn_dbg(nn, "NIC ctrl: 0x%x -> 0x%x\n", nn->dp.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->dp.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->dp.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 int
|
|
nfp_net_xdp_setup_drv(struct nfp_net *nn, struct bpf_prog *prog,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nfp_net_dp *dp;
|
|
|
|
if (!prog == !nn->dp.xdp_prog) {
|
|
WRITE_ONCE(nn->dp.xdp_prog, prog);
|
|
return 0;
|
|
}
|
|
|
|
dp = nfp_net_clone_dp(nn);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
|
|
dp->xdp_prog = prog;
|
|
dp->num_tx_rings += prog ? nn->dp.num_rx_rings : -nn->dp.num_rx_rings;
|
|
dp->rx_dma_dir = prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
|
|
dp->rx_dma_off = prog ? XDP_PACKET_HEADROOM - nn->dp.rx_offset : 0;
|
|
|
|
/* We need RX reconfig to remap the buffers (BIDIR vs FROM_DEV) */
|
|
return nfp_net_ring_reconfig(nn, dp, extack);
|
|
}
|
|
|
|
static int
|
|
nfp_net_xdp_setup(struct nfp_net *nn, struct bpf_prog *prog, u32 flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct bpf_prog *drv_prog, *offload_prog;
|
|
int err;
|
|
|
|
if (nn->xdp_prog && (flags ^ nn->xdp_flags) & XDP_FLAGS_MODES)
|
|
return -EBUSY;
|
|
|
|
/* Load both when no flags set to allow easy activation of driver path
|
|
* when program is replaced by one which can't be offloaded.
|
|
*/
|
|
drv_prog = flags & XDP_FLAGS_HW_MODE ? NULL : prog;
|
|
offload_prog = flags & XDP_FLAGS_DRV_MODE ? NULL : prog;
|
|
|
|
err = nfp_net_xdp_setup_drv(nn, drv_prog, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
err = nfp_app_xdp_offload(nn->app, nn, offload_prog);
|
|
if (err && flags & XDP_FLAGS_HW_MODE)
|
|
return err;
|
|
|
|
if (nn->xdp_prog)
|
|
bpf_prog_put(nn->xdp_prog);
|
|
nn->xdp_prog = prog;
|
|
nn->xdp_flags = flags;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nfp_net_xdp(struct net_device *netdev, struct netdev_xdp *xdp)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
|
|
switch (xdp->command) {
|
|
case XDP_SETUP_PROG:
|
|
case XDP_SETUP_PROG_HW:
|
|
return nfp_net_xdp_setup(nn, xdp->prog, xdp->flags,
|
|
xdp->extack);
|
|
case XDP_QUERY_PROG:
|
|
xdp->prog_attached = !!nn->xdp_prog;
|
|
if (nn->dp.bpf_offload_xdp)
|
|
xdp->prog_attached = XDP_ATTACHED_HW;
|
|
xdp->prog_id = nn->xdp_prog ? nn->xdp_prog->aux->id : 0;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int nfp_net_set_mac_address(struct net_device *netdev, void *addr)
|
|
{
|
|
struct nfp_net *nn = netdev_priv(netdev);
|
|
struct sockaddr *saddr = addr;
|
|
int err;
|
|
|
|
err = eth_prepare_mac_addr_change(netdev, addr);
|
|
if (err)
|
|
return err;
|
|
|
|
nfp_net_write_mac_addr(nn, saddr->sa_data);
|
|
|
|
err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MACADDR);
|
|
if (err)
|
|
return err;
|
|
|
|
eth_commit_mac_addr_change(netdev, addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_vlan_rx_add_vid = nfp_net_vlan_rx_add_vid,
|
|
.ndo_vlan_rx_kill_vid = nfp_net_vlan_rx_kill_vid,
|
|
.ndo_set_vf_mac = nfp_app_set_vf_mac,
|
|
.ndo_set_vf_vlan = nfp_app_set_vf_vlan,
|
|
.ndo_set_vf_spoofchk = nfp_app_set_vf_spoofchk,
|
|
.ndo_get_vf_config = nfp_app_get_vf_config,
|
|
.ndo_set_vf_link_state = nfp_app_set_vf_link_state,
|
|
.ndo_setup_tc = nfp_port_setup_tc,
|
|
.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 = nfp_net_set_mac_address,
|
|
.ndo_set_features = nfp_net_set_features,
|
|
.ndo_features_check = nfp_net_features_check,
|
|
.ndo_get_phys_port_name = nfp_port_get_phys_port_name,
|
|
.ndo_udp_tunnel_add = nfp_net_add_vxlan_port,
|
|
.ndo_udp_tunnel_del = nfp_net_del_vxlan_port,
|
|
.ndo_xdp = nfp_net_xdp,
|
|
};
|
|
|
|
/**
|
|
* 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 NFP-6xxx %sNetdev: TxQs=%d/%d RxQs=%d/%d\n",
|
|
nn->dp.is_vf ? "VF " : "",
|
|
nn->dp.num_tx_rings, nn->max_tx_rings,
|
|
nn->dp.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%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 ? "TSO1 " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_LSO2 ? "TSO2 " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_RSS ? "RSS1 " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_RSS2 ? "RSS2 " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER ? "CTAG_FILTER " : "",
|
|
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 " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_CSUM_COMPLETE ?
|
|
"RXCSUM_COMPLETE " : "",
|
|
nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR ? "LIVE_ADDR " : "",
|
|
nfp_app_extra_cap(nn->app, nn));
|
|
}
|
|
|
|
/**
|
|
* nfp_net_alloc() - Allocate netdev and related structure
|
|
* @pdev: PCI device
|
|
* @needs_netdev: Whether to allocate a netdev for this vNIC
|
|
* @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. In case of control device
|
|
* nfp_net structure is allocated without the netdev.
|
|
*
|
|
* Return: NFP Net device structure, or ERR_PTR on error.
|
|
*/
|
|
struct nfp_net *nfp_net_alloc(struct pci_dev *pdev, bool needs_netdev,
|
|
unsigned int max_tx_rings,
|
|
unsigned int max_rx_rings)
|
|
{
|
|
struct nfp_net *nn;
|
|
|
|
if (needs_netdev) {
|
|
struct net_device *netdev;
|
|
|
|
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->dp.netdev = netdev;
|
|
} else {
|
|
nn = vzalloc(sizeof(*nn));
|
|
if (!nn)
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
nn->dp.dev = &pdev->dev;
|
|
nn->pdev = pdev;
|
|
|
|
nn->max_tx_rings = max_tx_rings;
|
|
nn->max_rx_rings = max_rx_rings;
|
|
|
|
nn->dp.num_tx_rings = min_t(unsigned int,
|
|
max_tx_rings, num_online_cpus());
|
|
nn->dp.num_rx_rings = min_t(unsigned int, max_rx_rings,
|
|
netif_get_num_default_rss_queues());
|
|
|
|
nn->dp.num_r_vecs = max(nn->dp.num_tx_rings, nn->dp.num_rx_rings);
|
|
nn->dp.num_r_vecs = min_t(unsigned int,
|
|
nn->dp.num_r_vecs, num_online_cpus());
|
|
|
|
nn->dp.txd_cnt = NFP_NET_TX_DESCS_DEFAULT;
|
|
nn->dp.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_free() - Undo what @nfp_net_alloc() did
|
|
* @nn: NFP Net device to reconfigure
|
|
*/
|
|
void nfp_net_free(struct nfp_net *nn)
|
|
{
|
|
if (nn->xdp_prog)
|
|
bpf_prog_put(nn->xdp_prog);
|
|
|
|
if (nn->dp.netdev)
|
|
free_netdev(nn->dp.netdev);
|
|
else
|
|
vfree(nn);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_rss_key_sz() - Get current size of the RSS key
|
|
* @nn: NFP Net device instance
|
|
*
|
|
* Return: size of the RSS key for currently selected hash function.
|
|
*/
|
|
unsigned int nfp_net_rss_key_sz(struct nfp_net *nn)
|
|
{
|
|
switch (nn->rss_hfunc) {
|
|
case ETH_RSS_HASH_TOP:
|
|
return NFP_NET_CFG_RSS_KEY_SZ;
|
|
case ETH_RSS_HASH_XOR:
|
|
return 0;
|
|
case ETH_RSS_HASH_CRC32:
|
|
return 4;
|
|
}
|
|
|
|
nn_warn(nn, "Unknown hash function: %u\n", nn->rss_hfunc);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
unsigned long func_bit, rss_cap_hfunc;
|
|
u32 reg;
|
|
|
|
/* Read the RSS function capability and select first supported func */
|
|
reg = nn_readl(nn, NFP_NET_CFG_RSS_CAP);
|
|
rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC, reg);
|
|
if (!rss_cap_hfunc)
|
|
rss_cap_hfunc = FIELD_GET(NFP_NET_CFG_RSS_CAP_HFUNC,
|
|
NFP_NET_CFG_RSS_TOEPLITZ);
|
|
|
|
func_bit = find_first_bit(&rss_cap_hfunc, NFP_NET_CFG_RSS_HFUNCS);
|
|
if (func_bit == NFP_NET_CFG_RSS_HFUNCS) {
|
|
dev_warn(nn->dp.dev,
|
|
"Bad RSS config, defaulting to Toeplitz hash\n");
|
|
func_bit = ETH_RSS_HASH_TOP_BIT;
|
|
}
|
|
nn->rss_hfunc = 1 << func_bit;
|
|
|
|
netdev_rss_key_fill(nn->rss_key, nfp_net_rss_key_sz(nn));
|
|
|
|
nfp_net_rss_init_itbl(nn);
|
|
|
|
/* Enable IPv4/IPv6 TCP by default */
|
|
nn->rss_cfg = NFP_NET_CFG_RSS_IPV4_TCP |
|
|
NFP_NET_CFG_RSS_IPV6_TCP |
|
|
FIELD_PREP(NFP_NET_CFG_RSS_HFUNC, nn->rss_hfunc) |
|
|
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;
|
|
}
|
|
|
|
static void nfp_net_netdev_init(struct nfp_net *nn)
|
|
{
|
|
struct net_device *netdev = nn->dp.netdev;
|
|
|
|
nfp_net_write_mac_addr(nn, nn->dp.netdev->dev_addr);
|
|
|
|
netdev->mtu = nn->dp.mtu;
|
|
|
|
/* 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.
|
|
*/
|
|
if (nn->cap & NFP_NET_CFG_CTRL_LIVE_ADDR)
|
|
netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
|
|
|
|
netdev->hw_features = NETIF_F_HIGHDMA;
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY) {
|
|
netdev->hw_features |= NETIF_F_RXCSUM;
|
|
nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RXCSUM_ANY;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_TXCSUM) {
|
|
netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
|
|
nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXCSUM;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_GATHER) {
|
|
netdev->hw_features |= NETIF_F_SG;
|
|
nn->dp.ctrl |= NFP_NET_CFG_CTRL_GATHER;
|
|
}
|
|
if ((nn->cap & NFP_NET_CFG_CTRL_LSO && nn->fw_ver.major > 2) ||
|
|
nn->cap & NFP_NET_CFG_CTRL_LSO2) {
|
|
netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
|
|
nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_LSO2 ?:
|
|
NFP_NET_CFG_CTRL_LSO;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY)
|
|
netdev->hw_features |= NETIF_F_RXHASH;
|
|
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->dp.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->dp.ctrl |= NFP_NET_CFG_CTRL_RXVLAN;
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_TXVLAN) {
|
|
if (nn->cap & NFP_NET_CFG_CTRL_LSO2) {
|
|
nn_warn(nn, "Device advertises both TSO2 and TXVLAN. Refusing to enable TXVLAN.\n");
|
|
} else {
|
|
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX;
|
|
nn->dp.ctrl |= NFP_NET_CFG_CTRL_TXVLAN;
|
|
}
|
|
}
|
|
if (nn->cap & NFP_NET_CFG_CTRL_CTAG_FILTER) {
|
|
netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
|
|
nn->dp.ctrl |= NFP_NET_CFG_CTRL_CTAG_FILTER;
|
|
}
|
|
|
|
netdev->features = netdev->hw_features;
|
|
|
|
if (nfp_app_has_tc(nn->app))
|
|
netdev->hw_features |= NETIF_F_HW_TC;
|
|
|
|
/* Advertise but disable TSO by default. */
|
|
netdev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
|
|
nn->dp.ctrl &= ~NFP_NET_CFG_CTRL_LSO_ANY;
|
|
|
|
/* Finalise the netdev setup */
|
|
netdev->netdev_ops = &nfp_net_netdev_ops;
|
|
netdev->watchdog_timeo = msecs_to_jiffies(5 * 1000);
|
|
|
|
SWITCHDEV_SET_OPS(netdev, &nfp_port_switchdev_ops);
|
|
|
|
/* MTU range: 68 - hw-specific max */
|
|
netdev->min_mtu = ETH_MIN_MTU;
|
|
netdev->max_mtu = nn->max_mtu;
|
|
|
|
netif_carrier_off(netdev);
|
|
|
|
nfp_net_set_ethtool_ops(netdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_init() - Initialise/finalise the nfp_net structure
|
|
* @nn: NFP Net device structure
|
|
*
|
|
* Return: 0 on success or negative errno on error.
|
|
*/
|
|
int nfp_net_init(struct nfp_net *nn)
|
|
{
|
|
int err;
|
|
|
|
nn->dp.rx_dma_dir = DMA_FROM_DEVICE;
|
|
|
|
/* 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);
|
|
|
|
/* ABI 4.x and ctrl vNIC always use chained metadata, in other cases
|
|
* we allow use of non-chained metadata if RSS(v1) is the only
|
|
* advertised capability requiring metadata.
|
|
*/
|
|
nn->dp.chained_metadata_format = nn->fw_ver.major == 4 ||
|
|
!nn->dp.netdev ||
|
|
!(nn->cap & NFP_NET_CFG_CTRL_RSS) ||
|
|
nn->cap & NFP_NET_CFG_CTRL_CHAIN_META;
|
|
/* RSS(v1) uses non-chained metadata format, except in ABI 4.x where
|
|
* it has the same meaning as RSSv2.
|
|
*/
|
|
if (nn->dp.chained_metadata_format && nn->fw_ver.major != 4)
|
|
nn->cap &= ~NFP_NET_CFG_CTRL_RSS;
|
|
|
|
/* Determine RX packet/metadata boundary offset */
|
|
if (nn->fw_ver.major >= 2) {
|
|
u32 reg;
|
|
|
|
reg = nn_readl(nn, NFP_NET_CFG_RX_OFFSET);
|
|
if (reg > NFP_NET_MAX_PREPEND) {
|
|
nn_err(nn, "Invalid rx offset: %d\n", reg);
|
|
return -EINVAL;
|
|
}
|
|
nn->dp.rx_offset = reg;
|
|
} else {
|
|
nn->dp.rx_offset = NFP_NET_RX_OFFSET;
|
|
}
|
|
|
|
/* Set default MTU and Freelist buffer size */
|
|
if (nn->max_mtu < NFP_NET_DEFAULT_MTU)
|
|
nn->dp.mtu = nn->max_mtu;
|
|
else
|
|
nn->dp.mtu = NFP_NET_DEFAULT_MTU;
|
|
nn->dp.fl_bufsz = nfp_net_calc_fl_bufsz(&nn->dp);
|
|
|
|
if (nn->cap & NFP_NET_CFG_CTRL_RSS_ANY) {
|
|
nfp_net_rss_init(nn);
|
|
nn->dp.ctrl |= nn->cap & NFP_NET_CFG_CTRL_RSS2 ?:
|
|
NFP_NET_CFG_CTRL_RSS;
|
|
}
|
|
|
|
/* Allow L2 Broadcast and Multicast through by default, if supported */
|
|
if (nn->cap & NFP_NET_CFG_CTRL_L2BC)
|
|
nn->dp.ctrl |= NFP_NET_CFG_CTRL_L2BC;
|
|
if (nn->cap & NFP_NET_CFG_CTRL_L2MC)
|
|
nn->dp.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->dp.ctrl |= NFP_NET_CFG_CTRL_IRQMOD;
|
|
}
|
|
|
|
if (nn->dp.netdev)
|
|
nfp_net_netdev_init(nn);
|
|
|
|
/* 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;
|
|
|
|
nfp_net_vecs_init(nn);
|
|
|
|
if (!nn->dp.netdev)
|
|
return 0;
|
|
return register_netdev(nn->dp.netdev);
|
|
}
|
|
|
|
/**
|
|
* nfp_net_clean() - Undo what nfp_net_init() did.
|
|
* @nn: NFP Net device structure
|
|
*/
|
|
void nfp_net_clean(struct nfp_net *nn)
|
|
{
|
|
if (!nn->dp.netdev)
|
|
return;
|
|
|
|
unregister_netdev(nn->dp.netdev);
|
|
}
|