fnic_fcs.c: adds support for sending/receiving FCS frames in Ethernet and
FC mode. Interfaces with libFC, passes link events and frames to/from
libFC.
fnic_attrs.c: exposes host state, link state, driver version in SysFS
Signed-off-by: Abhijeet Joglekar <abjoglek@xxxxxxxxx>
Signed-off-by: Joe Eykholt <jeykholt@xxxxxxxxx>
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
---
drivers/scsi/fnic/fnic_attrs.c | 56 +++
drivers/scsi/fnic/fnic_fcs.c | 742 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 798 insertions(+), 0 deletions(-)
create mode 100644 drivers/scsi/fnic/fnic_attrs.c
create mode 100644 drivers/scsi/fnic/fnic_fcs.c
diff --git a/drivers/scsi/fnic/fnic_attrs.c b/drivers/scsi/fnic/fnic_attrs.c
new file mode 100644
index 0000000..aea0c3b
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_attrs.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/string.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include "fnic.h"
+
+static ssize_t fnic_show_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+ struct fnic *fnic = lport_priv(lp);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", fnic_state_str[fnic->state]);
+}
+
+static ssize_t fnic_show_drv_version(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", DRV_VERSION);
+}
+
+static ssize_t fnic_show_link_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fc_lport *lp = shost_priv(class_to_shost(dev));
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", (lp->link_up)
+ ? "Link Up" : "Link Down");
+}
+
+static DEVICE_ATTR(fnic_state, S_IRUGO, fnic_show_state, NULL);
+static DEVICE_ATTR(drv_version, S_IRUGO, fnic_show_drv_version, NULL);
+static DEVICE_ATTR(link_state, S_IRUGO, fnic_show_link_state, NULL);
+
+struct device_attribute *fnic_attrs[] = {
+ &dev_attr_fnic_state,
+ &dev_attr_drv_version,
+ &dev_attr_link_state,
+ NULL,
+};
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
new file mode 100644
index 0000000..07e6eed
--- /dev/null
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -0,0 +1,742 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/workqueue.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fcoe.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfc.h>
+#include "fnic_io.h"
+#include "fnic.h"
+#include "cq_enet_desc.h"
+#include "cq_exch_desc.h"
+
+struct workqueue_struct *fnic_event_queue;
+
+void fnic_handle_link(struct work_struct *work)
+{
+ struct fnic *fnic = container_of(work, struct fnic, link_work);
+ unsigned long flags;
+ int old_link_status;
+ u32 old_link_down_cnt;
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ return;
+ }
+
+ old_link_down_cnt = fnic->link_down_cnt;
+ old_link_status = fnic->link_status;
+ fnic->link_status = vnic_dev_link_status(fnic->vdev);
+ fnic->link_down_cnt = vnic_dev_link_down_cnt(fnic->vdev);
+
+ if (old_link_status == fnic->link_status) {
+ if (!fnic->link_status)
+ /* DOWN -> DOWN */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ else {
+ if (old_link_down_cnt != fnic->link_down_cnt) {
+ /* UP -> DOWN -> UP */
+ fnic->lport->host_stats.link_failure_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "link down\n");
+ fc_linkdown(fnic->lport);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "link up\n");
+ fc_linkup(fnic->lport);
+ } else
+ /* UP -> UP */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ }
+ } else if (fnic->link_status) {
+ /* DOWN -> UP */
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link up\n");
+ fc_linkup(fnic->lport);
+ } else {
+ /* UP -> DOWN */
+ fnic->lport->host_stats.link_failure_count++;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "link down\n");
+ fc_linkdown(fnic->lport);
+ }
+
+}
+
+/*
+ * This function passes incoming fabric frames to libFC
+ */
+void fnic_handle_frame(struct work_struct *work)
+{
+ struct fnic *fnic = container_of(work, struct fnic, frame_work);
+ struct fc_lport *lp = fnic->lport;
+ unsigned long flags;
+ struct sk_buff *skb;
+ struct fc_frame *fp;
+
+ while ((skb = skb_dequeue(&fnic->frame_queue))) {
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb(skb);
+ return;
+ }
+ fp = (struct fc_frame *)skb;
+ /* if Flogi resp frame, register the address */
+ if (fr_flags(fp)) {
+ vnic_dev_add_addr(fnic->vdev,
+ fnic->data_src_addr);
+ fr_flags(fp) = 0;
+ }
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ fc_exch_recv(lp, lp->emp, fp);
+ }
+
+}
+
+static inline void fnic_import_rq_fc_frame(struct sk_buff *skb,
+ u32 len, u8 sof, u8 eof)
+{
+ struct fc_frame *fp = (struct fc_frame *)skb;
+
+ skb_trim(skb, len);
+ fr_eof(fp) = eof;
+ fr_sof(fp) = sof;
+}
+
+
+static inline int fnic_import_rq_eth_pkt(struct sk_buff *skb, u32 len)
+{
+ struct fc_frame *fp;
+ struct ethhdr *eh;
+ struct vlan_ethhdr *vh;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fcoe_crc_eof *ft;
+ u32 transport_len = 0;
+
+ eh = (struct ethhdr *)skb->data;
+ vh = (struct vlan_ethhdr *)skb->data;
+ if (vh->h_vlan_proto == htons(ETH_P_8021Q) &&
+ vh->h_vlan_encapsulated_proto == htons(ETH_P_FCOE)) {
+ skb_pull(skb, sizeof(struct vlan_ethhdr));
+ transport_len += sizeof(struct vlan_ethhdr);
+ } else if (eh->h_proto == htons(ETH_P_FCOE)) {
+ transport_len += sizeof(struct ethhdr);
+ skb_pull(skb, sizeof(struct ethhdr));
+ } else
+ return -1;
+
+ fcoe_hdr = (struct fcoe_hdr *)skb->data;
+ if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
+ return -1;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = fcoe_hdr->fcoe_sof;
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ transport_len += sizeof(struct fcoe_hdr);
+
+ ft = (struct fcoe_crc_eof *)(skb->data + len -
+ transport_len - sizeof(*ft));
+ fr_eof(fp) = ft->fcoe_eof;
+ skb_trim(skb, len - transport_len - sizeof(*ft));
+ return 0;
+}
+
+static inline int fnic_handle_flogi_resp(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ u8 mac[ETH_ALEN] = FC_FCOE_FLOGI_MAC;
+ struct ethhdr *eth_hdr;
+ struct fc_frame_header *fh;
+ int ret = 0;
+ unsigned long flags;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ fh = (struct fc_frame_header *)fr_hdr(fp);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+
+ if (fnic->state == FNIC_IN_ETH_MODE) {
+
+ /*
+ * Check if oxid matches on taking the lock. A new Flogi
+ * issued by libFC might have changed the fnic cached oxid
+ */
+ if (fnic->flogi_oxid != ntohs(fh->fh_ox_id)) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Flogi response oxid not"
+ " matching cached oxid, dropping frame"
+ "\n");
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ /* Drop older cached flogi response frame, cache this frame */
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = fp;
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ /*
+ * this frame is part of flogi get the src mac addr from this
+ * frame if the src mac is fcoui based then we mark the
+ * address mode flag to use fcoui base for dst mac addr
+ * otherwise we have to store the fcoe gateway addr
+ */
+ eth_hdr = (struct ethhdr *)skb_mac_header(fp_skb(fp));
+ memcpy(mac, eth_hdr->h_source, ETH_ALEN);
+
+ if (ntoh24(mac) == FC_FCOE_OUI)
+ fnic->fcoui_mode = 1;
+ else {
+ fnic->fcoui_mode = 0;
+ memcpy(fnic->dest_addr, mac, ETH_ALEN);
+ }
+
+ /*
+ * Except for Flogi frame, all outbound frames from us have the
+ * Eth Src address as FC_FCOE_OUI"our_sid". Flogi frame uses
+ * the vnic MAC address as the Eth Src address
+ */
+ fc_fcoe_set_mac(fnic->data_src_addr, fh->fh_d_id);
+
+ /* We get our s_id from the d_id of the flogi resp frame */
+ fnic->s_id = ntoh24(fh->fh_d_id);
+
+ /* Change state to reflect transition from Eth to FC mode */
+ fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
+
+ } else {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Unexpected fnic state %s while"
+ " processing flogi resp\n",
+ fnic_state_to_str(fnic->state));
+ ret = -1;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb_irq(fp_skb(fp));
+ goto handle_flogi_resp_end;
+ }
+
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ /* Drop older cached frame */
+ if (old_flogi_resp)
+ dev_kfree_skb_irq(fp_skb(old_flogi_resp));
+
+ /*
+ * send flogi reg request to firmware, this will put the fnic in
+ * in FC mode
+ */
+ ret = fnic_flogi_reg_handler(fnic);
+
+ if (ret < 0) {
+ int free_fp = 1;
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ /*
+ * free the frame is some other thread is not
+ * pointing to it
+ */
+ if (fnic->flogi_resp != fp)
+ free_fp = 0;
+ else
+ fnic->flogi_resp = NULL;
+
+ if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
+ fnic->state = FNIC_IN_ETH_MODE;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ if (free_fp)
+ dev_kfree_skb_irq(fp_skb(fp));
+ }
+
+ handle_flogi_resp_end:
+ return ret;
+}
+
+/* Returns 1 for a response that matches cached flogi oxid */
+static inline int is_matching_flogi_resp_frame(struct fnic *fnic,
+ struct fc_frame *fp)
+{
+ struct fc_frame_header *fh;
+ int ret = 0;
+ u32 f_ctl;
+
+ fh = fc_frame_header_get(fp);
+ f_ctl = ntoh24(fh->fh_f_ctl);
+
+ if (fnic->flogi_oxid == ntohs(fh->fh_ox_id) &&
+ fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ (f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) == FC_FC_EX_CTX &&
+ fh->fh_type == FC_TYPE_ELS)
+ ret = 1;
+
+ return ret;
+}
+
+static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
+ *cq_desc, struct vnic_rq_buf *buf,
+ int skipped __attribute__((unused)),
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ struct fc_frame *fp;
+ unsigned int eth_hdrs_stripped;
+ u8 type, color, eop, sop, ingress_port, vlan_stripped;
+ u8 fcoe = 0, fcoe_sof, fcoe_eof;
+ u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
+ u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
+ u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
+ u8 fcs_ok = 1, packet_error = 0;
+ u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
+ u32 rss_hash;
+ u16 exchange_id, tmpl;
+ u8 sof = 0;
+ u8 eof = 0;
+ u32 fcp_bytes_written = 0;
+ unsigned long flags;
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+ skb = buf->os_buf;
+ buf->os_buf = NULL;
+
+ cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
+ if (type == CQ_DESC_TYPE_RQ_FCP) {
+ cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
+ &tmpl, &fcp_bytes_written, &sof, &eof,
+ &ingress_port, &packet_error,
+ &fcoe_enc_error, &fcs_ok, &vlan_stripped,
+ &vlan);
+ eth_hdrs_stripped = 1;
+
+ } else if (type == CQ_DESC_TYPE_RQ_ENET) {
+ cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
+ &type, &color, &q_number, &completed_index,
+ &ingress_port, &fcoe, &eop, &sop,
+ &rss_type, &csum_not_calc, &rss_hash,
+ &bytes_written, &packet_error,
+ &vlan_stripped, &vlan, &checksum,
+ &fcoe_sof, &fcoe_fc_crc_ok,
+ &fcoe_enc_error, &fcoe_eof,
+ &tcp_udp_csum_ok, &udp, &tcp,
+ &ipv4_csum_ok, &ipv6, &ipv4,
+ &ipv4_fragment, &fcs_ok);
+ eth_hdrs_stripped = 0;
+
+ } else {
+ /* wrong CQ type*/
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic rq_cmpl wrong cq type x%x\n", type);
+ goto drop;
+ }
+
+ if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "fnic rq_cmpl fcoe x%x fcsok x%x"
+ " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
+ " x%x\n",
+ fcoe, fcs_ok, packet_error,
+ fcoe_fc_crc_ok, fcoe_enc_error);
+ goto drop;
+ }
+
+ if (eth_hdrs_stripped)
+ fnic_import_rq_fc_frame(skb, fcp_bytes_written, sof, eof);
+ else if (fnic_import_rq_eth_pkt(skb, bytes_written))
+ goto drop;
+
+ fp = (struct fc_frame *)skb;
+
+ /*
+ * If frame is an ELS response that matches the cached FLOGI OX_ID,
+ * and is accept, issue flogi_reg_request copy wq request to firmware
+ * to register the S_ID and determine whether FC_OUI mode or GW mode.
+ */
+ if (is_matching_flogi_resp_frame(fnic, fp)) {
+ if (!eth_hdrs_stripped) {
+ if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
+ fnic_handle_flogi_resp(fnic, fp);
+ return;
+ }
+ /*
+ * Recd. Flogi reject. No point registering
+ * with fw, but forward to libFC
+ */
+ goto forward;
+ }
+ goto drop;
+ }
+ if (!eth_hdrs_stripped)
+ goto drop;
+
+forward:
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->stop_rx_link_events) {
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ goto drop;
+ }
+ /* Use fr_flags to indicate whether succ. flogi resp or not */
+ fr_flags(fp) = 0;
+ fr_dev(fp) = fnic->lport;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ skb_queue_tail(&fnic->frame_queue, skb);
+ queue_work(fnic_event_queue, &fnic->frame_work);
+
+ return;
+drop:
+ dev_kfree_skb_irq(skb);
+}
+
+static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+
+ vnic_rq_service(&fnic->rq[q_number], cq_desc, completed_index,
+ VNIC_RQ_RETURN_DESC, fnic_rq_cmpl_frame_recv,
+ NULL);
+ return 0;
+}
+
+int fnic_rq_cmpl_handler(struct fnic *fnic, int rq_work_to_do)
+{
+ unsigned int tot_rq_work_done = 0, cur_work_done;
+ unsigned int i;
+ int err;
+
+ for (i = 0; i < fnic->rq_count; i++) {
+ cur_work_done = vnic_cq_service(&fnic->cq[i], rq_work_to_do,
+ fnic_rq_cmpl_handler_cont,
+ NULL);
+ if (cur_work_done) {
+ err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
+ if (err)
+ shost_printk(KERN_ERR, fnic->lport->host,
+ "fnic_alloc_rq_frame cant alloc"
+ " frame\n");
+ }
+ tot_rq_work_done += cur_work_done;
+ }
+
+ return tot_rq_work_done;
+}
+
+/*
+ * This function is called once at init time to allocate and fill RQ
+ * buffers. Subsequently, it is called in the interrupt context after RQ
+ * buffer processing to replenish the buffers in the RQ
+ */
+int fnic_alloc_rq_frame(struct vnic_rq *rq)
+{
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+ struct sk_buff *skb;
+ u16 len;
+ dma_addr_t pa;
+
+ len = FC_FRAME_HEADROOM + FC_MAX_FRAME + FC_FRAME_TAILROOM;
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+ "Unable to allocate RQ sk_buff\n");
+ return -ENOMEM;
+ }
+ skb_reset_mac_header(skb);
+ skb_reset_transport_header(skb);
+ skb_reset_network_header(skb);
+ skb_put(skb, len);
+ pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
+ fnic_queue_rq_desc(rq, skb, pa, len);
+ return 0;
+}
+
+void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(rq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr, buf->len,
+ PCI_DMA_FROMDEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static inline int is_flogi_frame(struct fc_frame_header *fh)
+{
+ return fh->fh_r_ctl == FC_RCTL_ELS_REQ && *(u8 *)(fh + 1) == ELS_FLOGI;
+}
+
+int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
+{
+ struct vnic_wq *wq = &fnic->wq[0];
+ struct sk_buff *skb;
+ dma_addr_t pa;
+ struct ethhdr *eth_hdr;
+ struct vlan_ethhdr *vlan_hdr;
+ struct fcoe_hdr *fcoe_hdr;
+ struct fc_frame_header *fh;
+ u32 tot_len, eth_hdr_len;
+ int ret = 0;
+ unsigned long flags;
+
+ fh = fc_frame_header_get(fp);
+ skb = fp_skb(fp);
+
+ if (!fnic->vlan_hw_insert) {
+ eth_hdr_len = sizeof(*vlan_hdr) + sizeof(*fcoe_hdr);
+ vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr = (struct ethhdr *)vlan_hdr;
+ vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
+ vlan_hdr->h_vlan_encapsulated_proto = htons(ETH_P_FCOE);
+ vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
+ fcoe_hdr = (struct fcoe_hdr *)(vlan_hdr + 1);
+ } else {
+ eth_hdr_len = sizeof(*eth_hdr) + sizeof(*fcoe_hdr);
+ eth_hdr = (struct ethhdr *)skb_push(skb, eth_hdr_len);
+ eth_hdr->h_proto = htons(ETH_P_FCOE);
+ fcoe_hdr = (struct fcoe_hdr *)(eth_hdr + 1);
+ }
+
+ if (is_flogi_frame(fh)) {
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ memcpy(eth_hdr->h_source, fnic->mac_addr, ETH_ALEN);
+ } else {
+ if (fnic->fcoui_mode)
+ fc_fcoe_set_mac(eth_hdr->h_dest, fh->fh_d_id);
+ else
+ memcpy(eth_hdr->h_dest, fnic->dest_addr, ETH_ALEN);
+ memcpy(eth_hdr->h_source, fnic->data_src_addr, ETH_ALEN);
+ }
+
+ tot_len = skb->len;
+ BUG_ON(tot_len % 4);
+
+ memset(fcoe_hdr, 0, sizeof(*fcoe_hdr));
+ fcoe_hdr->fcoe_sof = fr_sof(fp);
+ if (FC_FCOE_VER)
+ FC_FCOE_ENCAPS_VER(fcoe_hdr, FC_FCOE_VER);
+
+ pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
+
+ spin_lock_irqsave(&fnic->wq_lock[0], flags);
+
+ if (!vnic_wq_desc_avail(wq)) {
+ pci_unmap_single(fnic->pdev, pa,
+ tot_len, PCI_DMA_TODEVICE);
+ ret = -1;
+ goto fnic_send_frame_end;
+ }
+
+ fnic_queue_wq_desc(wq, skb, pa, tot_len, fr_eof(fp),
+ fnic->vlan_hw_insert, fnic->vlan_id, 1, 1, 1);
+fnic_send_frame_end:
+ spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
+
+ if (ret)
+ dev_kfree_skb_any(fp_skb(fp));
+
+ return ret;
+}
+
+/*
+ * fnic_send
+ * Routine to send a raw frame
+ */
+int fnic_send(struct fc_lport *lp, struct fc_frame *fp)
+{
+ struct fnic *fnic = lport_priv(lp);
+ struct fc_frame_header *fh;
+ int ret = 0;
+ enum fnic_state old_state;
+ unsigned long flags;
+ struct fc_frame *old_flogi = NULL;
+ struct fc_frame *old_flogi_resp = NULL;
+
+ if (fnic->in_remove) {
+ dev_kfree_skb(fp_skb(fp));
+ ret = -1;
+ goto fnic_send_end;
+ }
+
+ fh = fc_frame_header_get(fp);
+ /* if not an Flogi frame, send it out, this is the common case */
+ if (!is_flogi_frame(fh))
+ return fnic_send_frame(fnic, fp);
+
+ /* Flogi frame, now enter the state machine */
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+again:
+ /* Get any old cached frames, free them after dropping lock */
+ old_flogi = fnic->flogi;
+ fnic->flogi = NULL;
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+
+ fnic->flogi_oxid = FC_XID_UNKNOWN;
+
+ old_state = fnic->state;
+ switch (old_state) {
+ case FNIC_IN_FC_MODE:
+ case FNIC_IN_ETH_TRANS_FC_MODE:
+ default:
+ fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
+ vnic_dev_del_addr(fnic->vdev, fnic->data_src_addr);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+
+ if (old_flogi) {
+ dev_kfree_skb(fp_skb(old_flogi));
+ old_flogi = NULL;
+ }
+ if (old_flogi_resp) {
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ old_flogi_resp = NULL;
+ }
+
+ ret = fnic_fw_reset_handler(fnic);
+
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
+ if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
+ goto again;
+ if (ret) {
+ fnic->state = old_state;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ dev_kfree_skb(fp_skb(fp));
+ goto fnic_send_end;
+ }
+ old_flogi = fnic->flogi;
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ old_flogi_resp = fnic->flogi_resp;
+ fnic->flogi_resp = NULL;
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_FC_TRANS_ETH_MODE:
+ /*
+ * A reset is pending with the firmware. Store the flogi
+ * and its oxid. The transition out of this state happens
+ * only when Firmware completes the reset, either with
+ * success or failed. If success, transition to
+ * FNIC_IN_ETH_MODE, if fail, then transition to
+ * FNIC_IN_FC_MODE
+ */
+ fnic->flogi = fp;
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ break;
+
+ case FNIC_IN_ETH_MODE:
+ /*
+ * The fw/hw is already in eth mode. Store the oxid,
+ * and send the flogi frame out. The transition out of this
+ * state happens only we receive flogi response from the
+ * network, and the oxid matches the cached oxid when the
+ * flogi frame was sent out. If they match, then we issue
+ * a flogi_reg request and transition to state
+ * FNIC_IN_ETH_TRANS_FC_MODE
+ */
+ fnic->flogi_oxid = ntohs(fh->fh_ox_id);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
+ ret = fnic_send_frame(fnic, fp);
+ break;
+ }
+
+fnic_send_end:
+ if (old_flogi)
+ dev_kfree_skb(fp_skb(old_flogi));
+ if (old_flogi_resp)
+ dev_kfree_skb(fp_skb(old_flogi_resp));
+ return ret;
+}
+
+static void fnic_wq_complete_frame_send(struct vnic_wq *wq,
+ struct cq_desc *cq_desc,
+ struct vnic_wq_buf *buf, void *opaque)
+{
+ struct sk_buff *skb = buf->os_buf;
+ struct fc_frame *fp = (struct fc_frame *)skb;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(fp_skb(fp));
+ buf->os_buf = NULL;
+}
+
+static int fnic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc, u8 type,
+ u16 q_number, u16 completed_index,
+ void *opaque)
+{
+ struct fnic *fnic = vnic_dev_priv(vdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fnic->wq_lock[q_number], flags);
+ vnic_wq_service(&fnic->wq[q_number], cq_desc, completed_index,
+ fnic_wq_complete_frame_send, NULL);
+ spin_unlock_irqrestore(&fnic->wq_lock[q_number], flags);
+
+ return 0;
+}
+
+int fnic_wq_cmpl_handler(struct fnic *fnic, int work_to_do)
+{
+ unsigned int wq_work_done = 0;
+ unsigned int i;
+
+ for (i = 0; i < fnic->raw_wq_count; i++) {
+ wq_work_done += vnic_cq_service(&fnic->cq[fnic->rq_count+i],
+ work_to_do,
+ fnic_wq_cmpl_handler_cont,
+ NULL);
+ }
+
+ return wq_work_done;
+}
+
+
+void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+{
+ struct fc_frame *fp = buf->os_buf;
+ struct fnic *fnic = vnic_dev_priv(wq->vdev);
+
+ pci_unmap_single(fnic->pdev, buf->dma_addr,
+ buf->len, PCI_DMA_TODEVICE);
+
+ dev_kfree_skb(fp_skb(fp));
+ buf->os_buf = NULL;
+}
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