302 lines
8.4 KiB
C
302 lines
8.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* QLogic FCoE Offload Driver
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* Copyright (c) 2016-2018 Cavium Inc.
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*/
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#include <linux/if_ether.h>
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#include <linux/if_vlan.h>
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#include "qedf.h"
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extern const struct qed_fcoe_ops *qed_ops;
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/*
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* FIP VLAN functions that will eventually move to libfcoe.
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*/
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void qedf_fcoe_send_vlan_req(struct qedf_ctx *qedf)
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{
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struct sk_buff *skb;
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char *eth_fr;
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struct fip_vlan *vlan;
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#define MY_FIP_ALL_FCF_MACS ((__u8[6]) { 1, 0x10, 0x18, 1, 0, 2 })
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static u8 my_fcoe_all_fcfs[ETH_ALEN] = MY_FIP_ALL_FCF_MACS;
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unsigned long flags = 0;
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int rc;
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skb = dev_alloc_skb(sizeof(struct fip_vlan));
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if (!skb) {
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QEDF_ERR(&qedf->dbg_ctx,
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"Failed to allocate skb.\n");
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return;
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}
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eth_fr = (char *)skb->data;
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vlan = (struct fip_vlan *)eth_fr;
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memset(vlan, 0, sizeof(*vlan));
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ether_addr_copy(vlan->eth.h_source, qedf->mac);
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ether_addr_copy(vlan->eth.h_dest, my_fcoe_all_fcfs);
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vlan->eth.h_proto = htons(ETH_P_FIP);
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vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
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vlan->fip.fip_op = htons(FIP_OP_VLAN);
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vlan->fip.fip_subcode = FIP_SC_VL_REQ;
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vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
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vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
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vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
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ether_addr_copy(vlan->desc.mac.fd_mac, qedf->mac);
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vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
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vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
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put_unaligned_be64(qedf->lport->wwnn, &vlan->desc.wwnn.fd_wwn);
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skb_put(skb, sizeof(*vlan));
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skb->protocol = htons(ETH_P_FIP);
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skb_reset_mac_header(skb);
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skb_reset_network_header(skb);
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Sending FIP VLAN "
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"request.");
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if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
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QEDF_WARN(&(qedf->dbg_ctx), "Cannot send vlan request "
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"because link is not up.\n");
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kfree_skb(skb);
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return;
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}
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set_bit(QED_LL2_XMIT_FLAGS_FIP_DISCOVERY, &flags);
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rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, flags);
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if (rc) {
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QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
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kfree_skb(skb);
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return;
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}
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}
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static void qedf_fcoe_process_vlan_resp(struct qedf_ctx *qedf,
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struct sk_buff *skb)
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{
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struct fip_header *fiph;
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struct fip_desc *desc;
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u16 vid = 0;
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ssize_t rlen;
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size_t dlen;
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fiph = (struct fip_header *)(((void *)skb->data) + 2 * ETH_ALEN + 2);
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rlen = ntohs(fiph->fip_dl_len) * 4;
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desc = (struct fip_desc *)(fiph + 1);
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while (rlen > 0) {
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dlen = desc->fip_dlen * FIP_BPW;
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switch (desc->fip_dtype) {
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case FIP_DT_VLAN:
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vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
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break;
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}
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desc = (struct fip_desc *)((char *)desc + dlen);
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rlen -= dlen;
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}
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if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
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"Dropping VLAN response as link is down.\n");
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return;
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}
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "VLAN response, "
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"vid=0x%x.\n", vid);
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if (vid > 0 && qedf->vlan_id != vid) {
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qedf_set_vlan_id(qedf, vid);
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/* Inform waiter that it's ok to call fcoe_ctlr_link up() */
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if (!completion_done(&qedf->fipvlan_compl))
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complete(&qedf->fipvlan_compl);
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}
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}
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void qedf_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
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{
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struct qedf_ctx *qedf = container_of(fip, struct qedf_ctx, ctlr);
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struct ethhdr *eth_hdr;
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struct fip_header *fiph;
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u16 op, vlan_tci = 0;
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u8 sub;
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int rc = -1;
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if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
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QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
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kfree_skb(skb);
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return;
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}
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fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
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eth_hdr = (struct ethhdr *)skb_mac_header(skb);
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op = ntohs(fiph->fip_op);
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sub = fiph->fip_subcode;
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/*
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* Add VLAN tag to non-offload FIP frame based on current stored VLAN
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* for FIP/FCoE traffic.
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*/
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__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
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/* Get VLAN ID from skb for printing purposes */
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__vlan_hwaccel_get_tag(skb, &vlan_tci);
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FIP frame send: "
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"dest=%pM op=%x sub=%x vlan=%04x.", eth_hdr->h_dest, op, sub,
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vlan_tci);
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if (qedf_dump_frames)
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print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
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skb->data, skb->len, false);
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rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, 0);
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if (rc) {
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QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
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kfree_skb(skb);
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return;
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}
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}
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static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
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/* Process incoming FIP frames. */
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void qedf_fip_recv(struct qedf_ctx *qedf, struct sk_buff *skb)
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{
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struct ethhdr *eth_hdr;
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struct fip_header *fiph;
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struct fip_desc *desc;
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struct fip_mac_desc *mp;
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struct fip_wwn_desc *wp;
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struct fip_vn_desc *vp;
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size_t rlen, dlen;
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u16 op;
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u8 sub;
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bool fcf_valid = false;
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/* Default is to handle CVL regardless of fabric id descriptor */
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bool fabric_id_valid = true;
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bool fc_wwpn_valid = false;
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u64 switch_name;
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u16 vlan = 0;
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eth_hdr = (struct ethhdr *)skb_mac_header(skb);
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fiph = (struct fip_header *) ((void *)skb->data + 2 * ETH_ALEN + 2);
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op = ntohs(fiph->fip_op);
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sub = fiph->fip_subcode;
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
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"FIP frame received: skb=%p fiph=%p source=%pM destn=%pM op=%x sub=%x vlan=%04x",
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skb, fiph, eth_hdr->h_source, eth_hdr->h_dest, op,
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sub, vlan);
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if (qedf_dump_frames)
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print_hex_dump(KERN_WARNING, "fip ", DUMP_PREFIX_OFFSET, 16, 1,
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skb->data, skb->len, false);
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if (!ether_addr_equal(eth_hdr->h_dest, qedf->mac) &&
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!ether_addr_equal(eth_hdr->h_dest, fcoe_all_enode) &&
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!ether_addr_equal(eth_hdr->h_dest, qedf->data_src_addr)) {
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
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"Dropping FIP type 0x%x pkt due to destination MAC mismatch dest_mac=%pM ctlr.dest_addr=%pM data_src_addr=%pM.\n",
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op, eth_hdr->h_dest, qedf->mac,
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qedf->data_src_addr);
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kfree_skb(skb);
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return;
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}
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/* Handle FIP VLAN resp in the driver */
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if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
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qedf_fcoe_process_vlan_resp(qedf, skb);
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kfree_skb(skb);
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} else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Clear virtual "
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"link received.\n");
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/* Check that an FCF has been selected by fcoe */
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if (qedf->ctlr.sel_fcf == NULL) {
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QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
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"Dropping CVL since FCF has not been selected "
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"yet.");
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kfree_skb(skb);
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return;
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}
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/*
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* We need to loop through the CVL descriptors to determine
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* if we want to reset the fcoe link
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*/
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rlen = ntohs(fiph->fip_dl_len) * FIP_BPW;
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desc = (struct fip_desc *)(fiph + 1);
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while (rlen >= sizeof(*desc)) {
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dlen = desc->fip_dlen * FIP_BPW;
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switch (desc->fip_dtype) {
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case FIP_DT_MAC:
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mp = (struct fip_mac_desc *)desc;
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
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"Switch fd_mac=%pM.\n", mp->fd_mac);
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if (ether_addr_equal(mp->fd_mac,
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qedf->ctlr.sel_fcf->fcf_mac))
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fcf_valid = true;
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break;
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case FIP_DT_NAME:
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wp = (struct fip_wwn_desc *)desc;
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switch_name = get_unaligned_be64(&wp->fd_wwn);
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
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"Switch fd_wwn=%016llx fcf_switch_name=%016llx.\n",
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switch_name,
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qedf->ctlr.sel_fcf->switch_name);
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if (switch_name ==
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qedf->ctlr.sel_fcf->switch_name)
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fc_wwpn_valid = true;
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break;
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case FIP_DT_VN_ID:
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fabric_id_valid = false;
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vp = (struct fip_vn_desc *)desc;
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QEDF_ERR(&qedf->dbg_ctx,
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"CVL vx_port fd_fc_id=0x%x fd_mac=%pM fd_wwpn=%016llx.\n",
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ntoh24(vp->fd_fc_id), vp->fd_mac,
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get_unaligned_be64(&vp->fd_wwpn));
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/* Check for vx_port wwpn OR Check vx_port
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* fabric ID OR Check vx_port MAC
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*/
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if ((get_unaligned_be64(&vp->fd_wwpn) ==
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qedf->wwpn) ||
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(ntoh24(vp->fd_fc_id) ==
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qedf->lport->port_id) ||
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(ether_addr_equal(vp->fd_mac,
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qedf->data_src_addr))) {
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fabric_id_valid = true;
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}
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break;
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default:
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/* Ignore anything else */
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break;
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}
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desc = (struct fip_desc *)((char *)desc + dlen);
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rlen -= dlen;
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}
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QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
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"fcf_valid=%d fabric_id_valid=%d fc_wwpn_valid=%d.\n",
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fcf_valid, fabric_id_valid, fc_wwpn_valid);
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if (fcf_valid && fabric_id_valid && fc_wwpn_valid)
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qedf_ctx_soft_reset(qedf->lport);
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kfree_skb(skb);
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} else {
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/* Everything else is handled by libfcoe */
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__skb_pull(skb, ETH_HLEN);
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fcoe_ctlr_recv(&qedf->ctlr, skb);
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}
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}
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u8 *qedf_get_src_mac(struct fc_lport *lport)
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{
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struct qedf_ctx *qedf = lport_priv(lport);
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return qedf->data_src_addr;
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}
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