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