static void qedf_rrq_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *rrq_req;
struct qedf_ctx *qedf;
int refcount;
rrq_req = cb_arg->io_req;
qedf = rrq_req->fcport->qedf;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered.\n");
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
if (rrq_req->event != QEDF_IOREQ_EV_ELS_TMO &&
rrq_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = kref_read(&orig_io_req->refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "rrq_compl: orig io = %p,"
" orig xid = 0x%x, rrq_xid = 0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, rrq_req->xid, refcount);
/* This should return the aborted io_req to the command pool */
if (orig_io_req)
kref_put(&orig_io_req->refcount, qedf_release_cmd);
out_free:
kfree(cb_arg);
}
void qedf_process_els_compl(struct qedf_ctx *qedf, struct fcoe_cqe *cqe,
struct qedf_ioreq *els_req)
{
struct fcoe_task_context *task_ctx;
struct scsi_cmnd *sc_cmd;
uint16_t xid;
struct fcoe_cqe_midpath_info *mp_info;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered with xid = 0x%x"
" cmd_type = %d.\n", els_req->xid, els_req->cmd_type);
/* Kill the ELS timer */
cancel_delayed_work(&els_req->timeout_work);
xid = els_req->xid;
task_ctx = qedf_get_task_mem(&qedf->tasks, xid);
sc_cmd = els_req->sc_cmd;
/* Get ELS response length from CQE */
mp_info = &cqe->cqe_info.midpath_info;
els_req->mp_req.resp_len = mp_info->data_placement_size;
/* Parse ELS response */
if ((els_req->cb_func) && (els_req->cb_arg)) {
els_req->cb_func(els_req->cb_arg);
els_req->cb_arg = NULL;
}
kref_put(&els_req->refcount, qedf_release_cmd);
}
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_update_src_mac(struct fc_lport *lport, u8 *addr)
{
struct qedf_ctx *qedf = lport_priv(lport);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
"Setting data_src_addr=%pM.\n", addr);
ether_addr_copy(qedf->data_src_addr, addr);
}
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;
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;
}
qed_ops->ll2->start_xmit(qedf->cdev, skb);
}
static void qedf_initiate_seq_cleanup(struct qedf_ioreq *orig_io_req,
u32 offset, u8 r_ctl)
{
struct qedf_rport *fcport;
unsigned long flags;
struct qedf_els_cb_arg *cb_arg;
struct fcoe_wqe *sqe;
u16 sqe_idx;
fcport = orig_io_req->fcport;
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Doing sequence cleanup for xid=0x%x offset=%u.\n",
orig_io_req->xid, offset);
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to allocate cb_arg "
"for sequence cleanup\n");
return;
}
/* Get reference for cleanup request */
kref_get(&orig_io_req->refcount);
orig_io_req->cmd_type = QEDF_SEQ_CLEANUP;
cb_arg->offset = offset;
cb_arg->r_ctl = r_ctl;
orig_io_req->cb_arg = cb_arg;
qedf_cmd_timer_set(fcport->qedf, orig_io_req,
QEDF_CLEANUP_TIMEOUT * HZ);
spin_lock_irqsave(&fcport->rport_lock, flags);
sqe_idx = qedf_get_sqe_idx(fcport);
sqe = &fcport->sq[sqe_idx];
memset(sqe, 0, sizeof(struct fcoe_wqe));
orig_io_req->task_params->sqe = sqe;
init_initiator_sequence_recovery_fcoe_task(orig_io_req->task_params,
offset);
qedf_ring_doorbell(fcport);
spin_unlock_irqrestore(&fcport->rport_lock, flags);
}
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 vlan_ethhdr *vlan_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;
if (!qedf->vlan_hw_insert) {
vlan_hdr = (struct vlan_ethhdr *)skb_push(skb, sizeof(*vlan_hdr)
- sizeof(*eth_hdr));
memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
vlan_hdr->h_vlan_TCI = vlan_tci = htons(qedf->vlan_id);
}
/* Update eth_hdr since we added a VLAN tag */
eth_hdr = (struct ethhdr *)skb_mac_header(skb);
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,
ntohs(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);
}
int qedf_send_adisc(struct qedf_rport *fcport, struct fc_frame *fp)
{
struct fc_els_adisc *adisc;
struct fc_frame_header *fh;
struct fc_lport *lport = fcport->qedf->lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t r_a_tov = lport->r_a_tov;
int rc;
qedf = fcport->qedf;
fh = fc_frame_header_get(fp);
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"ADISC\n");
rc = -ENOMEM;
goto adisc_err;
}
cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Sending ADISC ox_id=0x%x.\n", cb_arg->l2_oxid);
adisc = fc_frame_payload_get(fp, sizeof(*adisc));
rc = qedf_initiate_els(fcport, ELS_ADISC, adisc, sizeof(*adisc),
qedf_l2_els_compl, cb_arg, r_a_tov);
adisc_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "ADISC failed.\n");
kfree(cb_arg);
}
return rc;
}
/* It's assumed that the lock is held when calling this function. */
static int qedf_initiate_els(struct qedf_rport *fcport, unsigned int op,
void *data, uint32_t data_len,
void (*cb_func)(struct qedf_els_cb_arg *cb_arg),
struct qedf_els_cb_arg *cb_arg, uint32_t timer_msec)
{
struct qedf_ctx *qedf = fcport->qedf;
struct fc_lport *lport = qedf->lport;
struct qedf_ioreq *els_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *fc_hdr;
struct e4_fcoe_task_context *task;
int rc = 0;
uint32_t did, sid;
uint16_t xid;
uint32_t start_time = jiffies / HZ;
uint32_t current_time;
struct fcoe_wqe *sqe;
unsigned long flags;
u16 sqe_idx;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending ELS\n");
rc = fc_remote_port_chkready(fcport->rport);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: rport not ready\n", op);
rc = -EAGAIN;
goto els_err;
}
if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: link is not ready\n",
op);
rc = -EAGAIN;
goto els_err;
}
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(&(qedf->dbg_ctx), "els 0x%x: fcport not ready\n", op);
rc = -EINVAL;
goto els_err;
}
retry_els:
els_req = qedf_alloc_cmd(fcport, QEDF_ELS);
if (!els_req) {
current_time = jiffies / HZ;
if ((current_time - start_time) > 10) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"els: Failed els 0x%x\n", op);
rc = -ENOMEM;
goto els_err;
}
mdelay(20 * USEC_PER_MSEC);
goto retry_els;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "initiate_els els_req = "
"0x%p cb_arg = %p xid = %x\n", els_req, cb_arg,
els_req->xid);
els_req->sc_cmd = NULL;
els_req->cmd_type = QEDF_ELS;
els_req->fcport = fcport;
els_req->cb_func = cb_func;
cb_arg->io_req = els_req;
cb_arg->op = op;
els_req->cb_arg = cb_arg;
els_req->data_xfer_len = data_len;
/* Record which cpu this request is associated with */
els_req->cpu = smp_processor_id();
mp_req = (struct qedf_mp_req *)&(els_req->mp_req);
rc = qedf_init_mp_req(els_req);
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "ELS MP request init failed\n");
kref_put(&els_req->refcount, qedf_release_cmd);
goto els_err;
} else {
rc = 0;
}
/* Fill ELS Payload */
if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS)) {
memcpy(mp_req->req_buf, data, data_len);
} else {
QEDF_ERR(&(qedf->dbg_ctx), "Invalid ELS op 0x%x\n", op);
els_req->cb_func = NULL;
els_req->cb_arg = NULL;
kref_put(&els_req->refcount, qedf_release_cmd);
rc = -EINVAL;
}
if (rc)
goto els_err;
/* Fill FC header */
fc_hdr = &(mp_req->req_fc_hdr);
did = fcport->rdata->ids.port_id;
sid = fcport->sid;
__fc_fill_fc_hdr(fc_hdr, FC_RCTL_ELS_REQ, did, sid,
FC_TYPE_ELS, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
FC_FC_SEQ_INIT, 0);
/* Obtain exchange id */
xid = els_req->xid;
spin_lock_irqsave(&fcport->rport_lock, flags);
sqe_idx = qedf_get_sqe_idx(fcport);
sqe = &fcport->sq[sqe_idx];
memset(sqe, 0, sizeof(struct fcoe_wqe));
/* Initialize task context for this IO request */
task = qedf_get_task_mem(&qedf->tasks, xid);
qedf_init_mp_task(els_req, task, sqe);
/* Put timer on original I/O request */
if (timer_msec)
qedf_cmd_timer_set(qedf, els_req, timer_msec);
/* Ring doorbell */
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Ringing doorbell for ELS "
"req\n");
qedf_ring_doorbell(fcport);
spin_unlock_irqrestore(&fcport->rport_lock, flags);
els_err:
return rc;
}
/* Assumes kref is already held by caller */
int qedf_send_rrq(struct qedf_ioreq *aborted_io_req)
{
struct fc_els_rrq rrq;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t sid;
uint32_t r_a_tov;
int rc;
if (!aborted_io_req) {
QEDF_ERR(NULL, "abort_io_req is NULL.\n");
return -EINVAL;
}
fcport = aborted_io_req->fcport;
/* Check that fcport is still offloaded */
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending RRQ orig "
"io = %p, orig_xid = 0x%x\n", aborted_io_req,
aborted_io_req->xid);
memset(&rrq, 0, sizeof(rrq));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"RRQ\n");
rc = -ENOMEM;
goto rrq_err;
}
cb_arg->aborted_io_req = aborted_io_req;
rrq.rrq_cmd = ELS_RRQ;
hton24(rrq.rrq_s_id, sid);
rrq.rrq_ox_id = htons(aborted_io_req->xid);
rrq.rrq_rx_id =
htons(aborted_io_req->task->tstorm_st_context.read_write.rx_id);
rc = qedf_initiate_els(fcport, ELS_RRQ, &rrq, sizeof(rrq),
qedf_rrq_compl, cb_arg, r_a_tov);
rrq_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "RRQ failed - release orig io "
"req 0x%x\n", aborted_io_req->xid);
kfree(cb_arg);
kref_put(&aborted_io_req->refcount, qedf_release_cmd);
}
return rc;
}
static void qedf_l2_els_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *els_req;
struct qedf_rport *fcport;
struct qedf_mp_req *mp_req;
struct fc_frame *fp;
struct fc_frame_header *fh, *mp_fc_hdr;
void *resp_buf, *fc_payload;
u32 resp_len;
u16 l2_oxid;
l2_oxid = cb_arg->l2_oxid;
els_req = cb_arg->io_req;
if (!els_req) {
QEDF_ERR(NULL, "els_req is NULL.\n");
goto free_arg;
}
/*
* If we are flushing the command just free the cb_arg as none of the
* response data will be valid.
*/
if (els_req->event == QEDF_IOREQ_EV_ELS_FLUSH)
goto free_arg;
fcport = els_req->fcport;
mp_req = &(els_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
resp_buf = mp_req->resp_buf;
/*
* If a middle path ELS command times out, don't try to return
* the command but rather do any internal cleanup and then libfc
* timeout the command and clean up its internal resources.
*/
if (els_req->event == QEDF_IOREQ_EV_ELS_TMO) {
/*
* If ADISC times out, libfc will timeout the exchange and then
* try to send a PLOGI which will timeout since the session is
* still offloaded. Force libfc to logout the session which
* will offload the connection and allow the PLOGI response to
* flow over the LL2 path.
*/
if (cb_arg->op == ELS_ADISC)
qedf_restart_rport(fcport);
return;
}
if (sizeof(struct fc_frame_header) + resp_len > QEDF_PAGE_SIZE) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "resp_len is "
"beyond page size.\n");
goto free_arg;
}
fp = fc_frame_alloc(fcport->qedf->lport, resp_len);
if (!fp) {
QEDF_ERR(&(fcport->qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
return;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Completing OX_ID 0x%x back to libfc.\n", l2_oxid);
qedf_process_l2_frame_compl(fcport, fp, l2_oxid);
free_arg:
kfree(cb_arg);
}
/* 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;
uint32_t cvl_port_id;
__u8 cvl_mac[ETH_ALEN];
u16 op;
u8 sub;
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);
qedf->vlan_hw_insert = 0;
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.");
return;
}
cvl_port_id = 0;
memset(cvl_mac, 0, ETH_ALEN);
/*
* 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);
ether_addr_copy(cvl_mac, mp->fd_mac);
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));
cvl_port_id = ntoh24(vp->fd_fc_id);
break;
default:
/* Ignore anything else */
break;
}
desc = (struct fip_desc *)((char *)desc + dlen);
rlen -= dlen;
}
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
"cvl_port_id=%06x cvl_mac=%pM.\n", cvl_port_id,
cvl_mac);
if (cvl_port_id == qedf->lport->port_id &&
ether_addr_equal(cvl_mac,
qedf->ctlr.sel_fcf->fcf_mac)) {
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);
}
}
/* Assumes kref is already held by caller */
int qedf_send_rec(struct qedf_ioreq *orig_io_req)
{
struct fc_els_rec rec;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
struct qedf_ctx *qedf;
uint32_t sid;
uint32_t r_a_tov;
int rc;
if (!orig_io_req) {
QEDF_ERR(NULL, "orig_io_req is NULL.\n");
return -EINVAL;
}
fcport = orig_io_req->fcport;
/* Check that fcport is still offloaded */
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
/* Take reference until REC command completion */
kref_get(&orig_io_req->refcount);
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
memset(&rec, 0, sizeof(rec));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"REC\n");
rc = -ENOMEM;
goto rec_err;
}
cb_arg->aborted_io_req = orig_io_req;
rec.rec_cmd = ELS_REC;
hton24(rec.rec_s_id, sid);
rec.rec_ox_id = htons(orig_io_req->xid);
rec.rec_rx_id =
htons(orig_io_req->task->tstorm_st_context.read_write.rx_id);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending REC orig_io=%p, "
"orig_xid=0x%x rx_id=0x%x\n", orig_io_req,
orig_io_req->xid, rec.rec_rx_id);
rc = qedf_initiate_els(fcport, ELS_REC, &rec, sizeof(rec),
qedf_rec_compl, cb_arg, r_a_tov);
rec_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "REC failed - release orig_io_req"
"=0x%x\n", orig_io_req->xid);
kfree(cb_arg);
kref_put(&orig_io_req->refcount, qedf_release_cmd);
}
return rc;
}
static void qedf_rec_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *rec_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *mp_fc_hdr, *fh;
struct fc_frame *fp;
void *resp_buf, *fc_payload;
u32 resp_len;
struct fc_lport *lport;
struct qedf_ctx *qedf;
int refcount;
enum fc_rctl r_ctl;
struct fc_els_ls_rjt *rjt;
struct fc_els_rec_acc *acc;
u8 opcode;
u32 offset, e_stat;
struct scsi_cmnd *sc_cmd;
bool srr_needed = false;
rec_req = cb_arg->io_req;
qedf = rec_req->fcport->qedf;
lport = qedf->lport;
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
if (rec_req->event != QEDF_IOREQ_EV_ELS_TMO &&
rec_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = kref_read(&orig_io_req->refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
" orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, rec_req->xid, refcount);
/* If a REC times out, free resources */
if (rec_req->event == QEDF_IOREQ_EV_ELS_TMO)
goto out_put;
/* Normalize response data into struct fc_frame */
mp_req = &(rec_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
acc = resp_buf = mp_req->resp_buf;
fp = fc_frame_alloc(lport, resp_len);
if (!fp) {
QEDF_ERR(&(qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
goto out_put;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
opcode = fc_frame_payload_op(fp);
if (opcode == ELS_LS_RJT) {
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Received LS_RJT for REC: er_reason=0x%x, "
"er_explan=0x%x.\n", rjt->er_reason, rjt->er_explan);
/*
* The following response(s) mean that we need to reissue the
* request on another exchange. We need to do this without
* informing the upper layers lest it cause an application
* error.
*/
if ((rjt->er_reason == ELS_RJT_LOGIC ||
rjt->er_reason == ELS_RJT_UNAB) &&
rjt->er_explan == ELS_EXPL_OXID_RXID) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Handle CMD LOST case.\n");
qedf_requeue_io_req(orig_io_req);
}
} else if (opcode == ELS_LS_ACC) {
offset = ntohl(acc->reca_fc4value);
e_stat = ntohl(acc->reca_e_stat);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Received LS_ACC for REC: offset=0x%x, e_stat=0x%x.\n",
offset, e_stat);
if (e_stat & ESB_ST_SEQ_INIT) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"Target has the seq init\n");
goto out_free_frame;
}
sc_cmd = orig_io_req->sc_cmd;
if (!sc_cmd) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"sc_cmd is NULL for xid=0x%x.\n",
orig_io_req->xid);
goto out_free_frame;
}
/* SCSI write case */
if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
if (offset == orig_io_req->data_xfer_len) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"WRITE - response lost.\n");
r_ctl = FC_RCTL_DD_CMD_STATUS;
srr_needed = true;
offset = 0;
} else {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"WRITE - XFER_RDY/DATA lost.\n");
r_ctl = FC_RCTL_DD_DATA_DESC;
/* Use data from warning CQE instead of REC */
offset = orig_io_req->tx_buf_off;
}
/* SCSI read case */
} else {
if (orig_io_req->rx_buf_off ==
orig_io_req->data_xfer_len) {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"READ - response lost.\n");
srr_needed = true;
r_ctl = FC_RCTL_DD_CMD_STATUS;
offset = 0;
} else {
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"READ - DATA lost.\n");
/*
* For read case we always set the offset to 0
* for sequence recovery task.
*/
offset = 0;
r_ctl = FC_RCTL_DD_SOL_DATA;
}
}
if (srr_needed)
qedf_send_srr(orig_io_req, offset, r_ctl);
else
qedf_initiate_seq_cleanup(orig_io_req, offset, r_ctl);
}
out_free_frame:
fc_frame_free(fp);
out_put:
/* Put reference for original command since REC completed */
kref_put(&orig_io_req->refcount, qedf_release_cmd);
out_free:
kfree(cb_arg);
}
static bool qedf_requeue_io_req(struct qedf_ioreq *orig_io_req)
{
struct qedf_rport *fcport;
struct qedf_ioreq *new_io_req;
unsigned long flags;
bool rc = false;
fcport = orig_io_req->fcport;
if (!fcport) {
QEDF_ERR(NULL, "fcport is NULL.\n");
goto out;
}
if (!orig_io_req->sc_cmd) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "sc_cmd is NULL for "
"xid=0x%x.\n", orig_io_req->xid);
goto out;
}
new_io_req = qedf_alloc_cmd(fcport, QEDF_SCSI_CMD);
if (!new_io_req) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Could not allocate new "
"io_req.\n");
goto out;
}
new_io_req->sc_cmd = orig_io_req->sc_cmd;
/*
* This keeps the sc_cmd struct from being returned to the tape
* driver and being requeued twice. We do need to put a reference
* for the original I/O request since we will not do a SCSI completion
* for it.
*/
orig_io_req->sc_cmd = NULL;
kref_put(&orig_io_req->refcount, qedf_release_cmd);
spin_lock_irqsave(&fcport->rport_lock, flags);
/* kref for new command released in qedf_post_io_req on error */
if (qedf_post_io_req(fcport, new_io_req)) {
QEDF_ERR(&(fcport->qedf->dbg_ctx), "Unable to post io_req\n");
/* Return SQE to pool */
atomic_inc(&fcport->free_sqes);
} else {
QEDF_INFO(&(fcport->qedf->dbg_ctx), QEDF_LOG_ELS,
"Reissued SCSI command from orig_xid=0x%x on "
"new_xid=0x%x.\n", orig_io_req->xid, new_io_req->xid);
/*
* Abort the original I/O but do not return SCSI command as
* it has been reissued on another OX_ID.
*/
spin_unlock_irqrestore(&fcport->rport_lock, flags);
qedf_initiate_abts(orig_io_req, false);
goto out;
}
spin_unlock_irqrestore(&fcport->rport_lock, flags);
out:
return rc;
}
static int qedf_send_srr(struct qedf_ioreq *orig_io_req, u32 offset, u8 r_ctl)
{
struct fcp_srr srr;
struct qedf_ctx *qedf;
struct qedf_rport *fcport;
struct fc_lport *lport;
struct qedf_els_cb_arg *cb_arg = NULL;
u32 sid, r_a_tov;
int rc;
if (!orig_io_req) {
QEDF_ERR(NULL, "orig_io_req is NULL.\n");
return -EINVAL;
}
fcport = orig_io_req->fcport;
/* Check that fcport is still offloaded */
if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
QEDF_ERR(NULL, "fcport is no longer offloaded.\n");
return -EINVAL;
}
if (!fcport->qedf) {
QEDF_ERR(NULL, "fcport->qedf is NULL.\n");
return -EINVAL;
}
/* Take reference until SRR command completion */
kref_get(&orig_io_req->refcount);
qedf = fcport->qedf;
lport = qedf->lport;
sid = fcport->sid;
r_a_tov = lport->r_a_tov;
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Sending SRR orig_io=%p, "
"orig_xid=0x%x\n", orig_io_req, orig_io_req->xid);
memset(&srr, 0, sizeof(srr));
cb_arg = kzalloc(sizeof(struct qedf_els_cb_arg), GFP_NOIO);
if (!cb_arg) {
QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate cb_arg for "
"SRR\n");
rc = -ENOMEM;
goto srr_err;
}
cb_arg->aborted_io_req = orig_io_req;
srr.srr_op = ELS_SRR;
srr.srr_ox_id = htons(orig_io_req->xid);
srr.srr_rx_id = htons(orig_io_req->rx_id);
srr.srr_rel_off = htonl(offset);
srr.srr_r_ctl = r_ctl;
rc = qedf_initiate_els(fcport, ELS_SRR, &srr, sizeof(srr),
qedf_srr_compl, cb_arg, r_a_tov);
srr_err:
if (rc) {
QEDF_ERR(&(qedf->dbg_ctx), "SRR failed - release orig_io_req"
"=0x%x\n", orig_io_req->xid);
kfree(cb_arg);
/* If we fail to queue SRR, send ABTS to orig_io */
qedf_initiate_abts(orig_io_req, true);
kref_put(&orig_io_req->refcount, qedf_release_cmd);
} else
/* Tell other threads that SRR is in progress */
set_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
return rc;
}
static void qedf_srr_compl(struct qedf_els_cb_arg *cb_arg)
{
struct qedf_ioreq *orig_io_req;
struct qedf_ioreq *srr_req;
struct qedf_mp_req *mp_req;
struct fc_frame_header *mp_fc_hdr, *fh;
struct fc_frame *fp;
void *resp_buf, *fc_payload;
u32 resp_len;
struct fc_lport *lport;
struct qedf_ctx *qedf;
int refcount;
u8 opcode;
srr_req = cb_arg->io_req;
qedf = srr_req->fcport->qedf;
lport = qedf->lport;
orig_io_req = cb_arg->aborted_io_req;
if (!orig_io_req)
goto out_free;
clear_bit(QEDF_CMD_SRR_SENT, &orig_io_req->flags);
if (srr_req->event != QEDF_IOREQ_EV_ELS_TMO &&
srr_req->event != QEDF_IOREQ_EV_ELS_ERR_DETECT)
cancel_delayed_work_sync(&orig_io_req->timeout_work);
refcount = kref_read(&orig_io_req->refcount);
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS, "Entered: orig_io=%p,"
" orig_io_xid=0x%x, rec_xid=0x%x, refcount=%d\n",
orig_io_req, orig_io_req->xid, srr_req->xid, refcount);
/* If a SRR times out, simply free resources */
if (srr_req->event == QEDF_IOREQ_EV_ELS_TMO)
goto out_put;
/* Normalize response data into struct fc_frame */
mp_req = &(srr_req->mp_req);
mp_fc_hdr = &(mp_req->resp_fc_hdr);
resp_len = mp_req->resp_len;
resp_buf = mp_req->resp_buf;
fp = fc_frame_alloc(lport, resp_len);
if (!fp) {
QEDF_ERR(&(qedf->dbg_ctx),
"fc_frame_alloc failure.\n");
goto out_put;
}
/* Copy frame header from firmware into fp */
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
memcpy(fh, mp_fc_hdr, sizeof(struct fc_frame_header));
/* Copy payload from firmware into fp */
fc_payload = fc_frame_payload_get(fp, resp_len);
memcpy(fc_payload, resp_buf, resp_len);
opcode = fc_frame_payload_op(fp);
switch (opcode) {
case ELS_LS_ACC:
QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
"SRR success.\n");
break;
case ELS_LS_RJT:
QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_ELS,
"SRR rejected.\n");
qedf_initiate_abts(orig_io_req, true);
break;
}
fc_frame_free(fp);
out_put:
/* Put reference for original command since SRR completed */
kref_put(&orig_io_req->refcount, qedf_release_cmd);
out_free:
kfree(cb_arg);
}
