593 lines
14 KiB
C
593 lines
14 KiB
C
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/* Broadcom NetXtreme-C/E network driver.
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*
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* Copyright (c) 2016-2017 Broadcom Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*/
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#include <linux/pci.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/jhash.h>
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#include <net/pkt_cls.h>
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#include "bnxt_hsi.h"
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#include "bnxt.h"
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#include "bnxt_hwrm.h"
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#include "bnxt_vfr.h"
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#include "bnxt_devlink.h"
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#include "bnxt_tc.h"
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#ifdef CONFIG_BNXT_SRIOV
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#define CFA_HANDLE_INVALID 0xffff
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#define VF_IDX_INVALID 0xffff
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static int hwrm_cfa_vfr_alloc(struct bnxt *bp, u16 vf_idx,
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u16 *tx_cfa_action, u16 *rx_cfa_code)
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{
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struct hwrm_cfa_vfr_alloc_output *resp;
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struct hwrm_cfa_vfr_alloc_input *req;
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int rc;
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rc = hwrm_req_init(bp, req, HWRM_CFA_VFR_ALLOC);
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if (!rc) {
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req->vf_id = cpu_to_le16(vf_idx);
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sprintf(req->vfr_name, "vfr%d", vf_idx);
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resp = hwrm_req_hold(bp, req);
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rc = hwrm_req_send(bp, req);
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if (!rc) {
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*tx_cfa_action = le16_to_cpu(resp->tx_cfa_action);
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*rx_cfa_code = le16_to_cpu(resp->rx_cfa_code);
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netdev_dbg(bp->dev, "tx_cfa_action=0x%x, rx_cfa_code=0x%x",
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*tx_cfa_action, *rx_cfa_code);
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}
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hwrm_req_drop(bp, req);
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}
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if (rc)
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netdev_info(bp->dev, "%s error rc=%d\n", __func__, rc);
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return rc;
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}
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static int hwrm_cfa_vfr_free(struct bnxt *bp, u16 vf_idx)
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{
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struct hwrm_cfa_vfr_free_input *req;
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int rc;
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rc = hwrm_req_init(bp, req, HWRM_CFA_VFR_FREE);
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if (!rc) {
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sprintf(req->vfr_name, "vfr%d", vf_idx);
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rc = hwrm_req_send(bp, req);
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}
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if (rc)
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netdev_info(bp->dev, "%s error rc=%d\n", __func__, rc);
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return rc;
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}
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static int bnxt_hwrm_vfr_qcfg(struct bnxt *bp, struct bnxt_vf_rep *vf_rep,
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u16 *max_mtu)
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{
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struct hwrm_func_qcfg_output *resp;
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struct hwrm_func_qcfg_input *req;
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u16 mtu;
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int rc;
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rc = hwrm_req_init(bp, req, HWRM_FUNC_QCFG);
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if (rc)
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return rc;
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req->fid = cpu_to_le16(bp->pf.vf[vf_rep->vf_idx].fw_fid);
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resp = hwrm_req_hold(bp, req);
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rc = hwrm_req_send(bp, req);
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if (!rc) {
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mtu = le16_to_cpu(resp->max_mtu_configured);
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if (!mtu)
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*max_mtu = BNXT_MAX_MTU;
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else
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*max_mtu = mtu;
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}
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hwrm_req_drop(bp, req);
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return rc;
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}
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static int bnxt_vf_rep_open(struct net_device *dev)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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struct bnxt *bp = vf_rep->bp;
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/* Enable link and TX only if the parent PF is open. */
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if (netif_running(bp->dev)) {
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netif_carrier_on(dev);
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netif_tx_start_all_queues(dev);
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}
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return 0;
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}
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static int bnxt_vf_rep_close(struct net_device *dev)
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{
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netif_carrier_off(dev);
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netif_tx_disable(dev);
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return 0;
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}
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static netdev_tx_t bnxt_vf_rep_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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int rc, len = skb->len;
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skb_dst_drop(skb);
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dst_hold((struct dst_entry *)vf_rep->dst);
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skb_dst_set(skb, (struct dst_entry *)vf_rep->dst);
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skb->dev = vf_rep->dst->u.port_info.lower_dev;
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rc = dev_queue_xmit(skb);
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if (!rc) {
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vf_rep->tx_stats.packets++;
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vf_rep->tx_stats.bytes += len;
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}
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return rc;
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}
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static void
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bnxt_vf_rep_get_stats64(struct net_device *dev,
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struct rtnl_link_stats64 *stats)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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stats->rx_packets = vf_rep->rx_stats.packets;
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stats->rx_bytes = vf_rep->rx_stats.bytes;
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stats->tx_packets = vf_rep->tx_stats.packets;
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stats->tx_bytes = vf_rep->tx_stats.bytes;
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}
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static int bnxt_vf_rep_setup_tc_block_cb(enum tc_setup_type type,
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void *type_data,
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void *cb_priv)
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{
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struct bnxt_vf_rep *vf_rep = cb_priv;
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struct bnxt *bp = vf_rep->bp;
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int vf_fid = bp->pf.vf[vf_rep->vf_idx].fw_fid;
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if (!bnxt_tc_flower_enabled(vf_rep->bp) ||
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!tc_cls_can_offload_and_chain0(bp->dev, type_data))
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return -EOPNOTSUPP;
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switch (type) {
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case TC_SETUP_CLSFLOWER:
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return bnxt_tc_setup_flower(bp, vf_fid, type_data);
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default:
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return -EOPNOTSUPP;
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}
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}
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static LIST_HEAD(bnxt_vf_block_cb_list);
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static int bnxt_vf_rep_setup_tc(struct net_device *dev, enum tc_setup_type type,
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void *type_data)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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switch (type) {
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case TC_SETUP_BLOCK:
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return flow_block_cb_setup_simple(type_data,
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&bnxt_vf_block_cb_list,
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bnxt_vf_rep_setup_tc_block_cb,
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vf_rep, vf_rep, true);
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default:
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return -EOPNOTSUPP;
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}
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}
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struct net_device *bnxt_get_vf_rep(struct bnxt *bp, u16 cfa_code)
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{
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u16 vf_idx;
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if (cfa_code && bp->cfa_code_map && BNXT_PF(bp)) {
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vf_idx = bp->cfa_code_map[cfa_code];
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if (vf_idx != VF_IDX_INVALID)
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return bp->vf_reps[vf_idx]->dev;
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}
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return NULL;
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}
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void bnxt_vf_rep_rx(struct bnxt *bp, struct sk_buff *skb)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(skb->dev);
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vf_rep->rx_stats.bytes += skb->len;
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vf_rep->rx_stats.packets++;
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netif_receive_skb(skb);
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}
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static int bnxt_vf_rep_get_phys_port_name(struct net_device *dev, char *buf,
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size_t len)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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struct pci_dev *pf_pdev = vf_rep->bp->pdev;
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int rc;
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rc = snprintf(buf, len, "pf%dvf%d", PCI_FUNC(pf_pdev->devfn),
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vf_rep->vf_idx);
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if (rc >= len)
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return -EOPNOTSUPP;
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return 0;
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}
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static void bnxt_vf_rep_get_drvinfo(struct net_device *dev,
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struct ethtool_drvinfo *info)
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{
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strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
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}
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static int bnxt_vf_rep_get_port_parent_id(struct net_device *dev,
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struct netdev_phys_item_id *ppid)
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{
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struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
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/* as only PORT_PARENT_ID is supported currently use common code
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* between PF and VF-rep for now.
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*/
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return bnxt_get_port_parent_id(vf_rep->bp->dev, ppid);
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}
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static const struct ethtool_ops bnxt_vf_rep_ethtool_ops = {
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.get_drvinfo = bnxt_vf_rep_get_drvinfo
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};
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static const struct net_device_ops bnxt_vf_rep_netdev_ops = {
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.ndo_open = bnxt_vf_rep_open,
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.ndo_stop = bnxt_vf_rep_close,
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.ndo_start_xmit = bnxt_vf_rep_xmit,
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.ndo_get_stats64 = bnxt_vf_rep_get_stats64,
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.ndo_setup_tc = bnxt_vf_rep_setup_tc,
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.ndo_get_port_parent_id = bnxt_vf_rep_get_port_parent_id,
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.ndo_get_phys_port_name = bnxt_vf_rep_get_phys_port_name
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};
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bool bnxt_dev_is_vf_rep(struct net_device *dev)
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{
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return dev->netdev_ops == &bnxt_vf_rep_netdev_ops;
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}
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/* Called when the parent PF interface is closed:
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* As the mode transition from SWITCHDEV to LEGACY
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* happens under the rtnl_lock() this routine is safe
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* under the rtnl_lock()
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*/
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void bnxt_vf_reps_close(struct bnxt *bp)
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{
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struct bnxt_vf_rep *vf_rep;
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u16 num_vfs, i;
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if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
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return;
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num_vfs = pci_num_vf(bp->pdev);
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for (i = 0; i < num_vfs; i++) {
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vf_rep = bp->vf_reps[i];
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if (netif_running(vf_rep->dev))
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bnxt_vf_rep_close(vf_rep->dev);
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}
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}
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/* Called when the parent PF interface is opened (re-opened):
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* As the mode transition from SWITCHDEV to LEGACY
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* happen under the rtnl_lock() this routine is safe
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* under the rtnl_lock()
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*/
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void bnxt_vf_reps_open(struct bnxt *bp)
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{
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int i;
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if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
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return;
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for (i = 0; i < pci_num_vf(bp->pdev); i++) {
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/* Open the VF-Rep only if it is allocated in the FW */
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if (bp->vf_reps[i]->tx_cfa_action != CFA_HANDLE_INVALID)
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bnxt_vf_rep_open(bp->vf_reps[i]->dev);
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}
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}
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static void __bnxt_free_one_vf_rep(struct bnxt *bp, struct bnxt_vf_rep *vf_rep)
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{
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if (!vf_rep)
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return;
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if (vf_rep->dst) {
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dst_release((struct dst_entry *)vf_rep->dst);
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vf_rep->dst = NULL;
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}
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if (vf_rep->tx_cfa_action != CFA_HANDLE_INVALID) {
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hwrm_cfa_vfr_free(bp, vf_rep->vf_idx);
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vf_rep->tx_cfa_action = CFA_HANDLE_INVALID;
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}
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}
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static void __bnxt_vf_reps_destroy(struct bnxt *bp)
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{
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u16 num_vfs = pci_num_vf(bp->pdev);
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struct bnxt_vf_rep *vf_rep;
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int i;
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for (i = 0; i < num_vfs; i++) {
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vf_rep = bp->vf_reps[i];
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if (vf_rep) {
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__bnxt_free_one_vf_rep(bp, vf_rep);
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if (vf_rep->dev) {
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/* if register_netdev failed, then netdev_ops
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* would have been set to NULL
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*/
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if (vf_rep->dev->netdev_ops)
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unregister_netdev(vf_rep->dev);
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free_netdev(vf_rep->dev);
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}
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}
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}
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kfree(bp->vf_reps);
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bp->vf_reps = NULL;
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}
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void bnxt_vf_reps_destroy(struct bnxt *bp)
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{
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bool closed = false;
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if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
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return;
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if (!bp->vf_reps)
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return;
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/* Ensure that parent PF's and VF-reps' RX/TX has been quiesced
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* before proceeding with VF-rep cleanup.
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*/
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rtnl_lock();
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if (netif_running(bp->dev)) {
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bnxt_close_nic(bp, false, false);
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closed = true;
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}
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/* un-publish cfa_code_map so that RX path can't see it anymore */
|
||
|
|
kfree(bp->cfa_code_map);
|
||
|
|
bp->cfa_code_map = NULL;
|
||
|
|
bp->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
|
||
|
|
|
||
|
|
if (closed)
|
||
|
|
bnxt_open_nic(bp, false, false);
|
||
|
|
rtnl_unlock();
|
||
|
|
|
||
|
|
/* Need to call vf_reps_destroy() outside of rntl_lock
|
||
|
|
* as unregister_netdev takes rtnl_lock
|
||
|
|
*/
|
||
|
|
__bnxt_vf_reps_destroy(bp);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Free the VF-Reps in firmware, during firmware hot-reset processing.
|
||
|
|
* Note that the VF-Rep netdevs are still active (not unregistered) during
|
||
|
|
* this process. As the mode transition from SWITCHDEV to LEGACY happens
|
||
|
|
* under the rtnl_lock() this routine is safe under the rtnl_lock().
|
||
|
|
*/
|
||
|
|
void bnxt_vf_reps_free(struct bnxt *bp)
|
||
|
|
{
|
||
|
|
u16 num_vfs = pci_num_vf(bp->pdev);
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
|
||
|
|
return;
|
||
|
|
|
||
|
|
for (i = 0; i < num_vfs; i++)
|
||
|
|
__bnxt_free_one_vf_rep(bp, bp->vf_reps[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bnxt_alloc_vf_rep(struct bnxt *bp, struct bnxt_vf_rep *vf_rep,
|
||
|
|
u16 *cfa_code_map)
|
||
|
|
{
|
||
|
|
/* get cfa handles from FW */
|
||
|
|
if (hwrm_cfa_vfr_alloc(bp, vf_rep->vf_idx, &vf_rep->tx_cfa_action,
|
||
|
|
&vf_rep->rx_cfa_code))
|
||
|
|
return -ENOLINK;
|
||
|
|
|
||
|
|
cfa_code_map[vf_rep->rx_cfa_code] = vf_rep->vf_idx;
|
||
|
|
vf_rep->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL);
|
||
|
|
if (!vf_rep->dst)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* only cfa_action is needed to mux a packet while TXing */
|
||
|
|
vf_rep->dst->u.port_info.port_id = vf_rep->tx_cfa_action;
|
||
|
|
vf_rep->dst->u.port_info.lower_dev = bp->dev;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Allocate the VF-Reps in firmware, during firmware hot-reset processing.
|
||
|
|
* Note that the VF-Rep netdevs are still active (not unregistered) during
|
||
|
|
* this process. As the mode transition from SWITCHDEV to LEGACY happens
|
||
|
|
* under the rtnl_lock() this routine is safe under the rtnl_lock().
|
||
|
|
*/
|
||
|
|
int bnxt_vf_reps_alloc(struct bnxt *bp)
|
||
|
|
{
|
||
|
|
u16 *cfa_code_map = bp->cfa_code_map, num_vfs = pci_num_vf(bp->pdev);
|
||
|
|
struct bnxt_vf_rep *vf_rep;
|
||
|
|
int rc, i;
|
||
|
|
|
||
|
|
if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (!cfa_code_map)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
for (i = 0; i < MAX_CFA_CODE; i++)
|
||
|
|
cfa_code_map[i] = VF_IDX_INVALID;
|
||
|
|
|
||
|
|
for (i = 0; i < num_vfs; i++) {
|
||
|
|
vf_rep = bp->vf_reps[i];
|
||
|
|
vf_rep->vf_idx = i;
|
||
|
|
|
||
|
|
rc = bnxt_alloc_vf_rep(bp, vf_rep, cfa_code_map);
|
||
|
|
if (rc)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err:
|
||
|
|
netdev_info(bp->dev, "%s error=%d\n", __func__, rc);
|
||
|
|
bnxt_vf_reps_free(bp);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Use the OUI of the PF's perm addr and report the same mac addr
|
||
|
|
* for the same VF-rep each time
|
||
|
|
*/
|
||
|
|
static void bnxt_vf_rep_eth_addr_gen(u8 *src_mac, u16 vf_idx, u8 *mac)
|
||
|
|
{
|
||
|
|
u32 addr;
|
||
|
|
|
||
|
|
ether_addr_copy(mac, src_mac);
|
||
|
|
|
||
|
|
addr = jhash(src_mac, ETH_ALEN, 0) + vf_idx;
|
||
|
|
mac[3] = (u8)(addr & 0xFF);
|
||
|
|
mac[4] = (u8)((addr >> 8) & 0xFF);
|
||
|
|
mac[5] = (u8)((addr >> 16) & 0xFF);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void bnxt_vf_rep_netdev_init(struct bnxt *bp, struct bnxt_vf_rep *vf_rep,
|
||
|
|
struct net_device *dev)
|
||
|
|
{
|
||
|
|
struct net_device *pf_dev = bp->dev;
|
||
|
|
u16 max_mtu;
|
||
|
|
|
||
|
|
dev->netdev_ops = &bnxt_vf_rep_netdev_ops;
|
||
|
|
dev->ethtool_ops = &bnxt_vf_rep_ethtool_ops;
|
||
|
|
/* Just inherit all the featues of the parent PF as the VF-R
|
||
|
|
* uses the RX/TX rings of the parent PF
|
||
|
|
*/
|
||
|
|
dev->hw_features = pf_dev->hw_features;
|
||
|
|
dev->gso_partial_features = pf_dev->gso_partial_features;
|
||
|
|
dev->vlan_features = pf_dev->vlan_features;
|
||
|
|
dev->hw_enc_features = pf_dev->hw_enc_features;
|
||
|
|
dev->features |= pf_dev->features;
|
||
|
|
bnxt_vf_rep_eth_addr_gen(bp->pf.mac_addr, vf_rep->vf_idx,
|
||
|
|
dev->perm_addr);
|
||
|
|
eth_hw_addr_set(dev, dev->perm_addr);
|
||
|
|
/* Set VF-Rep's max-mtu to the corresponding VF's max-mtu */
|
||
|
|
if (!bnxt_hwrm_vfr_qcfg(bp, vf_rep, &max_mtu))
|
||
|
|
dev->max_mtu = max_mtu;
|
||
|
|
dev->min_mtu = ETH_ZLEN;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int bnxt_vf_reps_create(struct bnxt *bp)
|
||
|
|
{
|
||
|
|
u16 *cfa_code_map = NULL, num_vfs = pci_num_vf(bp->pdev);
|
||
|
|
struct bnxt_vf_rep *vf_rep;
|
||
|
|
struct net_device *dev;
|
||
|
|
int rc, i;
|
||
|
|
|
||
|
|
if (!(bp->flags & BNXT_FLAG_DSN_VALID))
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
bp->vf_reps = kcalloc(num_vfs, sizeof(vf_rep), GFP_KERNEL);
|
||
|
|
if (!bp->vf_reps)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* storage for cfa_code to vf-idx mapping */
|
||
|
|
cfa_code_map = kmalloc_array(MAX_CFA_CODE, sizeof(*bp->cfa_code_map),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!cfa_code_map) {
|
||
|
|
rc = -ENOMEM;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
for (i = 0; i < MAX_CFA_CODE; i++)
|
||
|
|
cfa_code_map[i] = VF_IDX_INVALID;
|
||
|
|
|
||
|
|
for (i = 0; i < num_vfs; i++) {
|
||
|
|
dev = alloc_etherdev(sizeof(*vf_rep));
|
||
|
|
if (!dev) {
|
||
|
|
rc = -ENOMEM;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
vf_rep = netdev_priv(dev);
|
||
|
|
bp->vf_reps[i] = vf_rep;
|
||
|
|
vf_rep->dev = dev;
|
||
|
|
vf_rep->bp = bp;
|
||
|
|
vf_rep->vf_idx = i;
|
||
|
|
vf_rep->tx_cfa_action = CFA_HANDLE_INVALID;
|
||
|
|
|
||
|
|
rc = bnxt_alloc_vf_rep(bp, vf_rep, cfa_code_map);
|
||
|
|
if (rc)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
bnxt_vf_rep_netdev_init(bp, vf_rep, dev);
|
||
|
|
rc = register_netdev(dev);
|
||
|
|
if (rc) {
|
||
|
|
/* no need for unregister_netdev in cleanup */
|
||
|
|
dev->netdev_ops = NULL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* publish cfa_code_map only after all VF-reps have been initialized */
|
||
|
|
bp->cfa_code_map = cfa_code_map;
|
||
|
|
bp->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
|
||
|
|
netif_keep_dst(bp->dev);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err:
|
||
|
|
netdev_info(bp->dev, "%s error=%d\n", __func__, rc);
|
||
|
|
kfree(cfa_code_map);
|
||
|
|
__bnxt_vf_reps_destroy(bp);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Devlink related routines */
|
||
|
|
int bnxt_dl_eswitch_mode_get(struct devlink *devlink, u16 *mode)
|
||
|
|
{
|
||
|
|
struct bnxt *bp = bnxt_get_bp_from_dl(devlink);
|
||
|
|
|
||
|
|
*mode = bp->eswitch_mode;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int bnxt_dl_eswitch_mode_set(struct devlink *devlink, u16 mode,
|
||
|
|
struct netlink_ext_ack *extack)
|
||
|
|
{
|
||
|
|
struct bnxt *bp = bnxt_get_bp_from_dl(devlink);
|
||
|
|
|
||
|
|
if (bp->eswitch_mode == mode) {
|
||
|
|
netdev_info(bp->dev, "already in %s eswitch mode\n",
|
||
|
|
mode == DEVLINK_ESWITCH_MODE_LEGACY ?
|
||
|
|
"legacy" : "switchdev");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (mode) {
|
||
|
|
case DEVLINK_ESWITCH_MODE_LEGACY:
|
||
|
|
bnxt_vf_reps_destroy(bp);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
case DEVLINK_ESWITCH_MODE_SWITCHDEV:
|
||
|
|
if (bp->hwrm_spec_code < 0x10803) {
|
||
|
|
netdev_warn(bp->dev, "FW does not support SRIOV E-Switch SWITCHDEV mode\n");
|
||
|
|
return -ENOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pci_num_vf(bp->pdev) == 0) {
|
||
|
|
netdev_info(bp->dev, "Enable VFs before setting switchdev mode\n");
|
||
|
|
return -EPERM;
|
||
|
|
}
|
||
|
|
return bnxt_vf_reps_create(bp);
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|