static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
mutex_lock(&lport->lp_mutex);
/*
* Handle special ELS cases like FLOGI, LOGO, and
* RSCN here. These don't require a session.
* Even if we had a session, it might not be ready.
*/
if (!lport->link_up)
fc_frame_free(fp);
else if (fh->fh_type == FC_TYPE_ELS &&
fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
/*
* Check opcode.
*/
recv = lport->tt.rport_recv_req;
switch (fc_frame_payload_op(fp)) {
case ELS_FLOGI:
recv = fc_lport_recv_flogi_req;
break;
case ELS_LOGO:
fh = fc_frame_header_get(fp);
if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
recv = fc_lport_recv_logo_req;
break;
case ELS_RSCN:
recv = lport->tt.disc_recv_req;
break;
case ELS_ECHO:
recv = fc_lport_recv_echo_req;
break;
case ELS_RLIR:
recv = fc_lport_recv_rlir_req;
break;
case ELS_RNID:
recv = fc_lport_recv_rnid_req;
break;
}
recv(sp, fp, lport);
} else {
FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
fr_eof(fp));
fc_frame_free(fp);
}
mutex_unlock(&lport->lp_mutex);
/*
* The common exch_done for all request may not be good
* if any request requires longer hold on exhange. XXX
*/
lport->tt.exch_done(sp);
}
static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
mutex_lock(&lport->lp_mutex);
if (!lport->link_up)
fc_frame_free(fp);
else if (fh->fh_type == FC_TYPE_ELS &&
fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
recv = lport->tt.rport_recv_req;
switch (fc_frame_payload_op(fp)) {
case ELS_FLOGI:
recv = fc_lport_recv_flogi_req;
break;
case ELS_LOGO:
fh = fc_frame_header_get(fp);
if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
recv = fc_lport_recv_logo_req;
break;
case ELS_RSCN:
recv = lport->tt.disc_recv_req;
break;
case ELS_ECHO:
recv = fc_lport_recv_echo_req;
break;
case ELS_RLIR:
recv = fc_lport_recv_rlir_req;
break;
case ELS_RNID:
recv = fc_lport_recv_rnid_req;
break;
}
recv(sp, fp, lport);
} else {
FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
fr_eof(fp));
fc_frame_free(fp);
}
mutex_unlock(&lport->lp_mutex);
lport->tt.exch_done(sp);
}
int bnx2fc_send_logo(struct bnx2fc_rport *tgt, struct fc_frame *fp)
{
struct fc_els_logo *logo;
struct fc_frame_header *fh;
struct bnx2fc_els_cb_arg *cb_arg;
struct fc_lport *lport = tgt->rdata->local_port;
u32 r_a_tov = lport->r_a_tov;
int rc;
fh = fc_frame_header_get(fp);
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
if (!cb_arg) {
printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
return -ENOMEM;
}
cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
BNX2FC_ELS_DBG("Send LOGO: l2_oxid = 0x%x\n", cb_arg->l2_oxid);
logo = fc_frame_payload_get(fp, sizeof(*logo));
/* logo is initialized by libfc */
rc = bnx2fc_initiate_els(tgt, ELS_LOGO, logo, sizeof(*logo),
bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
if (rc)
kfree(cb_arg);
return rc;
}
/*
* Debug: dump mgmt command.
*/
static void ft_cmd_tm_dump(struct scst_mgmt_cmd *mcmd, const char *caller)
{
struct ft_cmd *fcmd;
struct fc_frame_header *fh;
char prefix[30];
char buf[150];
if (!(ft_debug_logging & FT_DEBUG_IO))
return;
fcmd = scst_mgmt_cmd_get_tgt_priv(mcmd);
fh = fc_frame_header_get(fcmd->req_frame);
snprintf(prefix, sizeof(prefix), FT_MODULE ": mcmd");
pr_info("%s %s oid %x oxid %x lun %lld\n",
prefix, caller, ntoh24(fh->fh_s_id), ntohs(fh->fh_ox_id),
(unsigned long long)mcmd->lun);
pr_info("%s state %d fn %d fin_wait %d done_wait %d comp %d\n",
prefix, mcmd->state, mcmd->fn,
mcmd->cmd_finish_wait_count, mcmd->cmd_done_wait_count,
mcmd->completed_cmd_count);
buf[0] = '\0';
if (mcmd->needs_unblocking)
ft_cmd_flag(buf, sizeof(buf), "needs_unblock");
if (mcmd->lun_set)
ft_cmd_flag(buf, sizeof(buf), "lun_set");
if (mcmd->cmd_sn_set)
ft_cmd_flag(buf, sizeof(buf), "cmd_sn_set");
pr_info("%s flags %s\n", prefix, buf);
if (mcmd->cmd_to_abort)
ft_cmd_dump(mcmd->cmd_to_abort, caller);
}
/*
* FC sequence response handler for follow-on sequences (data) and aborts.
*/
static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg)
{
struct ft_cmd *cmd = arg;
struct fc_frame_header *fh;
if (IS_ERR(fp)) {
/* XXX need to find cmd if queued */
cmd->se_cmd.t_state = TRANSPORT_REMOVE;
cmd->seq = NULL;
transport_generic_free_cmd(&cmd->se_cmd, 0, 1, 0);
return;
}
fh = fc_frame_header_get(fp);
switch (fh->fh_r_ctl) {
case FC_RCTL_DD_SOL_DATA: /* write data */
ft_recv_write_data(cmd, fp);
break;
case FC_RCTL_DD_UNSOL_CTL: /* command */
case FC_RCTL_DD_SOL_CTL: /* transfer ready */
case FC_RCTL_DD_DATA_DESC: /* transfer ready */
default:
// printk(KERN_INFO "%s: unhandled frame r_ctl %x\n",
;
fc_frame_free(fp);
transport_generic_free_cmd(&cmd->se_cmd, 0, 1, 0);
break;
}
}
/*
* FC sequence response handler for follow-on sequences (data) and aborts.
*/
static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg)
{
struct ft_cmd *cmd = arg;
struct fc_frame_header *fh;
if (unlikely(IS_ERR(fp))) {
/* XXX need to find cmd if queued */
cmd->seq = NULL;
cmd->aborted = true;
return;
}
fh = fc_frame_header_get(fp);
switch (fh->fh_r_ctl) {
case FC_RCTL_DD_SOL_DATA: /* write data */
ft_recv_write_data(cmd, fp);
break;
case FC_RCTL_DD_UNSOL_CTL: /* command */
case FC_RCTL_DD_SOL_CTL: /* transfer ready */
case FC_RCTL_DD_DATA_DESC: /* transfer ready */
default:
pr_debug("%s: unhandled frame r_ctl %x\n",
__func__, fh->fh_r_ctl);
ft_invl_hw_context(cmd);
fc_frame_free(fp);
transport_generic_free_cmd(&cmd->se_cmd, 0);
break;
}
}
struct fc_seq *bnx2fc_elsct_send(struct fc_lport *lport, u32 did,
struct fc_frame *fp, unsigned int op,
void (*resp)(struct fc_seq *,
struct fc_frame *,
void *),
void *arg, u32 timeout)
{
struct fcoe_port *port = lport_priv(lport);
struct bnx2fc_interface *interface = port->priv;
struct fcoe_ctlr *fip = bnx2fc_to_ctlr(interface);
struct fc_frame_header *fh = fc_frame_header_get(fp);
switch (op) {
case ELS_FLOGI:
case ELS_FDISC:
return fc_elsct_send(lport, did, fp, op, bnx2fc_flogi_resp,
fip, timeout);
case ELS_LOGO:
/* only hook onto fabric logouts, not port logouts */
if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
break;
return fc_elsct_send(lport, did, fp, op, bnx2fc_logo_resp,
fip, timeout);
}
return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
/**
* fc_lport_recv_req() - The generic lport request handler
* @lport: The lport that received the request
* @fp: The frame the request is in
*
* Locking Note: This function should not be called with the lport
* lock held because it may grab the lock.
*/
static void fc_lport_recv_req(struct fc_lport *lport,
struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
struct fc_seq *sp = fr_seq(fp);
struct fc4_prov *prov;
/*
* Use RCU read lock and module_lock to be sure module doesn't
* deregister and get unloaded while we're calling it.
* try_module_get() is inlined and accepts a NULL parameter.
* Only ELSes and FCP target ops should come through here.
* The locking is unfortunate, and a better scheme is being sought.
*/
rcu_read_lock();
if (fh->fh_type >= FC_FC4_PROV_SIZE)
goto drop;
prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
if (!prov || !try_module_get(prov->module))
goto drop;
rcu_read_unlock();
prov->recv(lport, fp);
module_put(prov->module);
return;
drop:
rcu_read_unlock();
FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
fc_frame_free(fp);
lport->tt.exch_done(sp);
}
static void qedf_process_l2_frame_compl(struct qedf_rport *fcport,
struct fc_frame *fp,
u16 l2_oxid)
{
struct fc_lport *lport = fcport->qedf->lport;
struct fc_frame_header *fh;
u32 crc;
fh = (struct fc_frame_header *)fc_frame_header_get(fp);
/* Set the OXID we return to what libfc used */
if (l2_oxid != FC_XID_UNKNOWN)
fh->fh_ox_id = htons(l2_oxid);
/* Setup header fields */
fh->fh_r_ctl = FC_RCTL_ELS_REP;
fh->fh_type = FC_TYPE_ELS;
/* Last sequence, end sequence */
fh->fh_f_ctl[0] = 0x98;
hton24(fh->fh_d_id, lport->port_id);
hton24(fh->fh_s_id, fcport->rdata->ids.port_id);
fh->fh_rx_id = 0xffff;
/* Set frame attributes */
crc = fcoe_fc_crc(fp);
fc_frame_init(fp);
fr_dev(fp) = lport;
fr_sof(fp) = FC_SOF_I3;
fr_eof(fp) = FC_EOF_T;
fr_crc(fp) = cpu_to_le32(~crc);
/* Send completed request to libfc */
fc_exch_recv(lport, fp);
}
int bnx2fc_send_rls(struct bnx2fc_rport *tgt, struct fc_frame *fp)
{
struct fc_els_rls *rls;
struct fc_frame_header *fh;
struct bnx2fc_els_cb_arg *cb_arg;
struct fc_lport *lport = tgt->rdata->local_port;
u32 r_a_tov = lport->r_a_tov;
int rc;
fh = fc_frame_header_get(fp);
cb_arg = kzalloc(sizeof(struct bnx2fc_els_cb_arg), GFP_ATOMIC);
if (!cb_arg) {
printk(KERN_ERR PFX "Unable to allocate cb_arg for LOGO\n");
return -ENOMEM;
}
cb_arg->l2_oxid = ntohs(fh->fh_ox_id);
rls = fc_frame_payload_get(fp, sizeof(*rls));
/* rls is initialized by libfc */
rc = bnx2fc_initiate_els(tgt, ELS_RLS, rls, sizeof(*rls),
bnx2fc_l2_els_compl, cb_arg, 2 * r_a_tov);
if (rc)
kfree(cb_arg);
return rc;
}
static void fc_lport_recv_flogi_req(struct fc_lport *lport,
struct fc_frame *rx_fp)
{
struct fc_frame *fp;
struct fc_frame_header *fh;
struct fc_els_flogi *flp;
struct fc_els_flogi *new_flp;
u64 remote_wwpn;
u32 remote_fid;
u32 local_fid;
FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
fc_lport_state(lport));
remote_fid = fc_frame_sid(rx_fp);
flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
if (!flp)
goto out;
remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
if (remote_wwpn == lport->wwpn) {
printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
"with same WWPN %16.16llx\n",
lport->host->host_no, remote_wwpn);
goto out;
}
FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
local_fid = FC_LOCAL_PTP_FID_LO;
if (remote_wwpn < lport->wwpn) {
local_fid = FC_LOCAL_PTP_FID_HI;
if (!remote_fid || remote_fid == local_fid)
remote_fid = FC_LOCAL_PTP_FID_LO;
} else if (!remote_fid) {
remote_fid = FC_LOCAL_PTP_FID_HI;
}
fc_lport_set_port_id(lport, local_fid, rx_fp);
fp = fc_frame_alloc(lport, sizeof(*flp));
if (fp) {
new_flp = fc_frame_payload_get(fp, sizeof(*flp));
fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
new_flp->fl_cmd = (u8) ELS_LS_ACC;
fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
fh = fc_frame_header_get(fp);
hton24(fh->fh_s_id, local_fid);
hton24(fh->fh_d_id, remote_fid);
lport->tt.frame_send(lport, fp);
} else {
fc_lport_error(lport, fp);
}
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
get_unaligned_be64(&flp->fl_wwnn));
out:
fc_frame_free(rx_fp);
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
/*
* cmd may have been broken up into multiple
* tasks. Link their sgs together so we can
* operate on them all at once.
*/
transport_do_task_sg_chain(se_cmd);
cmd->sg = se_cmd->t_tasks_sg_chained;
cmd->sg_cnt =
se_cmd->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
cmd->sg,
cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
static void ft_send_work(struct work_struct *work)
{
struct ft_cmd *cmd = container_of(work, struct ft_cmd, work);
struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame);
struct fcp_cmnd *fcp;
int data_dir = 0;
int task_attr;
fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp));
if (!fcp)
goto err;
if (fcp->fc_flags & FCP_CFL_LEN_MASK)
goto err;
if (fcp->fc_tm_flags) {
ft_send_tm(cmd);
return;
}
switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) {
case 0:
data_dir = DMA_NONE;
break;
case FCP_CFL_RDDATA:
data_dir = DMA_FROM_DEVICE;
break;
case FCP_CFL_WRDATA:
data_dir = DMA_TO_DEVICE;
break;
case FCP_CFL_WRDATA | FCP_CFL_RDDATA:
goto err;
}
switch (fcp->fc_pri_ta & FCP_PTA_MASK) {
case FCP_PTA_HEADQ:
task_attr = MSG_HEAD_TAG;
break;
case FCP_PTA_ORDERED:
task_attr = MSG_ORDERED_TAG;
break;
case FCP_PTA_ACA:
task_attr = MSG_ACA_TAG;
break;
case FCP_PTA_SIMPLE:
default:
task_attr = MSG_SIMPLE_TAG;
}
fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd);
target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb,
&cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
ntohl(fcp->fc_dl), task_attr, data_dir, 0);
pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl);
return;
err:
ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID);
}
/**
* fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
* @sp: The sequence for the FC Passthrough response
* @fp: The response frame
* @info_arg: The BSG info that the response is for
*/
static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
void *info_arg)
{
struct fc_bsg_info *info = info_arg;
struct fc_bsg_job *job = info->job;
struct fc_lport *lport = info->lport;
struct fc_frame_header *fh;
size_t len;
void *buf;
if (IS_ERR(fp)) {
job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
-ECONNABORTED : -ETIMEDOUT;
job->reply_len = sizeof(uint32_t);
job->state_flags |= FC_RQST_STATE_DONE;
job->job_done(job);
kfree(info);
return;
}
mutex_lock(&lport->lp_mutex);
fh = fc_frame_header_get(fp);
len = fr_len(fp) - sizeof(*fh);
buf = fc_frame_payload_get(fp, 0);
if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
/* Get the response code from the first frame payload */
unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
(unsigned short)fc_frame_payload_op(fp);
/* Save the reply status of the job */
job->reply->reply_data.ctels_reply.status =
(cmd == info->rsp_code) ?
FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
}
job->reply->reply_payload_rcv_len +=
fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
&info->offset, KM_BIO_SRC_IRQ, NULL);
if (fr_eof(fp) == FC_EOF_T &&
(ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
(FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
if (job->reply->reply_payload_rcv_len >
job->reply_payload.payload_len)
job->reply->reply_payload_rcv_len =
job->reply_payload.payload_len;
job->reply->result = 0;
job->state_flags |= FC_RQST_STATE_DONE;
job->job_done(job);
kfree(info);
}
fc_frame_free(fp);
mutex_unlock(&lport->lp_mutex);
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
/*
* Map se_mem list to scatterlist, so that
* DDP can be setup. DDP setup function require
* scatterlist. se_mem_list is internal to
* TCM/LIO target
*/
transport_do_task_sg_chain(se_cmd);
cmd->sg = T_TASK(se_cmd)->t_tasks_sg_chained;
cmd->sg_cnt =
T_TASK(se_cmd)->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_setup(lport, ep->xid,
cmd->sg, cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
/**
* fc_lport_recv_req() - The generic lport request handler
* @lport: The local port that received the request
* @fp: The request frame
*
* This function will see if the lport handles the request or
* if an rport should handle the request.
*
* Locking Note: This function should not be called with the lport
* lock held becuase it will grab the lock.
*/
static void fc_lport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
void (*recv)(struct fc_lport *, struct fc_frame *);
mutex_lock(&lport->lp_mutex);
/*
* Handle special ELS cases like FLOGI, LOGO, and
* RSCN here. These don't require a session.
* Even if we had a session, it might not be ready.
*/
if (!lport->link_up)
fc_frame_free(fp);
else if (fh->fh_type == FC_TYPE_ELS &&
fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
/*
* Check opcode.
*/
recv = lport->tt.rport_recv_req;
switch (fc_frame_payload_op(fp)) {
case ELS_FLOGI:
if (!lport->point_to_multipoint)
recv = fc_lport_recv_flogi_req;
break;
case ELS_LOGO:
if (fc_frame_sid(fp) == FC_FID_FLOGI)
recv = fc_lport_recv_logo_req;
break;
case ELS_RSCN:
recv = lport->tt.disc_recv_req;
break;
case ELS_ECHO:
recv = fc_lport_recv_echo_req;
break;
case ELS_RLIR:
recv = fc_lport_recv_rlir_req;
break;
case ELS_RNID:
recv = fc_lport_recv_rnid_req;
break;
}
recv(lport, fp);
} else {
FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
fr_eof(fp));
fc_frame_free(fp);
}
mutex_unlock(&lport->lp_mutex);
}
/**
* fc_lport_ct_request() - Send CT Passthrough request
* @job: The BSG Passthrough job
* @lport: The local port sending the request
* @did: The destination FC-ID
* @tov: The timeout period to wait for the response
*
* Locking Note: The lport lock is expected to be held before calling
* this routine.
*/
static int fc_lport_ct_request(struct fc_bsg_job *job,
struct fc_lport *lport, u32 did, u32 tov)
{
struct fc_bsg_info *info;
struct fc_frame *fp;
struct fc_frame_header *fh;
struct fc_ct_req *ct;
size_t len;
fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
job->request_payload.payload_len);
if (!fp)
return -ENOMEM;
len = job->request_payload.payload_len;
ct = fc_frame_payload_get(fp, len);
sg_copy_to_buffer(job->request_payload.sg_list,
job->request_payload.sg_cnt,
ct, len);
fh = fc_frame_header_get(fp);
fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
hton24(fh->fh_d_id, did);
hton24(fh->fh_s_id, lport->port_id);
fh->fh_type = FC_TYPE_CT;
hton24(fh->fh_f_ctl, FC_FCTL_REQ);
fh->fh_cs_ctl = 0;
fh->fh_df_ctl = 0;
fh->fh_parm_offset = 0;
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
if (!info) {
fc_frame_free(fp);
return -ENOMEM;
}
info->job = job;
info->lport = lport;
info->rsp_code = FC_FS_ACC;
info->nents = job->reply_payload.sg_cnt;
info->sg = job->reply_payload.sg_list;
if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
NULL, info, tov)) {
kfree(info);
return -ECOMM;
}
return 0;
}
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM;
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = lport->tt.seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
if (f_ctl & FC_FC_EX_CTX) {
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if (se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
transport_do_task_sg_chain(se_cmd);
cmd->sg = se_cmd->t_tasks_sg_chained;
cmd->sg_cnt =
se_cmd->t_tasks_sg_chained_no;
}
if (cmd->sg && lport->tt.ddp_target(lport, ep->xid,
cmd->sg,
cmd->sg_cnt))
cmd->was_ddp_setup = 1;
}
}
lport->tt.seq_send(lport, cmd->seq, fp);
return 0;
}
static int fc_lport_els_request(struct fc_bsg_job *job,
struct fc_lport *lport,
u32 did, u32 tov)
{
struct fc_bsg_info *info;
struct fc_frame *fp;
struct fc_frame_header *fh;
char *pp;
int len;
fp = fc_frame_alloc(lport, job->request_payload.payload_len);
if (!fp)
return -ENOMEM;
len = job->request_payload.payload_len;
pp = fc_frame_payload_get(fp, len);
sg_copy_to_buffer(job->request_payload.sg_list,
job->request_payload.sg_cnt,
pp, len);
fh = fc_frame_header_get(fp);
fh->fh_r_ctl = FC_RCTL_ELS_REQ;
hton24(fh->fh_d_id, did);
hton24(fh->fh_s_id, lport->port_id);
fh->fh_type = FC_TYPE_ELS;
hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
FC_FC_END_SEQ | FC_FC_SEQ_INIT);
fh->fh_cs_ctl = 0;
fh->fh_df_ctl = 0;
fh->fh_parm_offset = 0;
info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
if (!info) {
fc_frame_free(fp);
return -ENOMEM;
}
info->job = job;
info->lport = lport;
info->rsp_code = ELS_LS_ACC;
info->nents = job->reply_payload.sg_cnt;
info->sg = job->reply_payload.sg_list;
if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
NULL, info, tov))
return -ECOMM;
return 0;
}
/*
* Send TX_RDY (transfer ready).
*/
int ft_write_pending(struct se_cmd *se_cmd)
{
struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd);
struct fc_frame *fp;
struct fcp_txrdy *txrdy;
struct fc_lport *lport;
struct fc_exch *ep;
struct fc_frame_header *fh;
u32 f_ctl;
ft_dump_cmd(cmd, __func__);
if (cmd->aborted)
return 0;
ep = fc_seq_exch(cmd->seq);
lport = ep->lp;
fp = fc_frame_alloc(lport, sizeof(*txrdy));
if (!fp)
return -ENOMEM; /* Signal QUEUE_FULL */
txrdy = fc_frame_payload_get(fp, sizeof(*txrdy));
memset(txrdy, 0, sizeof(*txrdy));
txrdy->ft_burst_len = htonl(se_cmd->data_length);
cmd->seq = fc_seq_start_next(cmd->seq);
fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP,
FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
fh = fc_frame_header_get(fp);
f_ctl = ntoh24(fh->fh_f_ctl);
/* Only if it is 'Exchange Responder' */
if (f_ctl & FC_FC_EX_CTX) {
/* Target is 'exchange responder' and sending XFER_READY
* to 'exchange initiator (initiator)'
*/
if ((ep->xid <= lport->lro_xid) &&
(fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) {
if ((se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) &&
lport->tt.ddp_target(lport, ep->xid,
se_cmd->t_data_sg,
se_cmd->t_data_nents))
cmd->was_ddp_setup = 1;
}
}
fc_seq_send(lport, cmd->seq, fp);
return 0;
}
/* 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 fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
void *lp_arg)
{
struct fc_lport *lport = lp_arg;
struct fc_frame_header *fh;
struct fc_ct_hdr *ct;
FC_LPORT_DBG(lport, "Received a RPN_ID %s\n", fc_els_resp_type(fp));
if (fp == ERR_PTR(-FC_EX_CLOSED))
return;
mutex_lock(&lport->lp_mutex);
if (lport->state != LPORT_ST_RPN_ID) {
FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state "
"%s\n", fc_lport_state(lport));
if (IS_ERR(fp))
goto err;
goto out;
}
if (IS_ERR(fp)) {
fc_lport_error(lport, fp);
goto err;
}
fh = fc_frame_header_get(fp);
ct = fc_frame_payload_get(fp, sizeof(*ct));
if (fh && ct && fh->fh_type == FC_TYPE_CT &&
ct->ct_fs_type == FC_FST_DIR &&
ct->ct_fs_subtype == FC_NS_SUBTYPE &&
ntohs(ct->ct_cmd) == FC_FS_ACC)
fc_lport_enter_rft_id(lport);
else
fc_lport_error(lport, fp);
out:
fc_frame_free(fp);
err:
mutex_unlock(&lport->lp_mutex);
}
void ft_recv_req(struct ft_sess *sess, struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
switch (fh->fh_r_ctl) {
case FC_RCTL_DD_UNSOL_CMD:
ft_recv_cmd(sess, fp);
break;
case FC_RCTL_DD_SOL_DATA:
case FC_RCTL_DD_UNSOL_CTL:
case FC_RCTL_DD_SOL_CTL:
case FC_RCTL_DD_DATA_DESC:
case FC_RCTL_ELS4_REQ:
default:
pr_debug("%s: unhandled frame r_ctl %x\n",
__func__, fh->fh_r_ctl);
fc_frame_free(fp);
ft_sess_put(sess);
break;
}
}
/*
* Handle incoming FCP frame.
* Caller has verified that the frame is type FCP.
*/
void ft_recv_req(struct ft_sess *sess, struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
switch (fh->fh_r_ctl) {
case FC_RCTL_DD_UNSOL_CMD: /* command */
ft_recv_cmd(sess, fp);
break;
case FC_RCTL_DD_SOL_DATA: /* write data */
case FC_RCTL_DD_UNSOL_CTL:
case FC_RCTL_DD_SOL_CTL:
case FC_RCTL_DD_DATA_DESC: /* transfer ready */
case FC_RCTL_ELS4_REQ: /* SRR, perhaps */
default:
pr_debug("%s: unhandled frame r_ctl %x\n",
__func__, fh->fh_r_ctl);
fc_frame_free(fp);
ft_sess_put(sess); /* undo get from lookup */
break;
}
}
static void bnx2fc_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
void *arg)
{
struct fcoe_ctlr *fip = arg;
struct fc_exch *exch = fc_seq_exch(seq);
struct fc_lport *lport = exch->lp;
u8 *mac;
struct fc_frame_header *fh;
u8 op;
if (IS_ERR(fp))
goto done;
mac = fr_cb(fp)->granted_mac;
if (is_zero_ether_addr(mac)) {
fh = fc_frame_header_get(fp);
if (fh->fh_type != FC_TYPE_ELS) {
printk(KERN_ERR PFX "bnx2fc_flogi_resp:"
"fh_type != FC_TYPE_ELS\n");
fc_frame_free(fp);
return;
}
op = fc_frame_payload_op(fp);
if (lport->vport) {
if (op == ELS_LS_RJT) {
printk(KERN_ERR PFX "bnx2fc_flogi_resp is LS_RJT\n");
fc_vport_terminate(lport->vport);
fc_frame_free(fp);
return;
}
}
if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
fc_frame_free(fp);
return;
}
}
fip->update_mac(lport, mac);
done:
fc_lport_flogi_resp(seq, fp, lport);
}
/*
* Send a FCP response including SCSI status and optional FCP rsp_code.
* status is SAM_STAT_GOOD (zero) iff code is valid.
* This is used in error cases, such as allocation failures.
*/
static void ft_send_resp_status(struct fc_lport *lport,
const struct fc_frame *rx_fp,
u32 status, enum fcp_resp_rsp_codes code)
{
struct fc_frame *fp;
struct fc_seq *sp;
const struct fc_frame_header *fh;
size_t len;
struct fcp_resp_with_ext *fcp;
struct fcp_resp_rsp_info *info;
fh = fc_frame_header_get(rx_fp);
pr_debug("FCP error response: did %x oxid %x status %x code %x\n",
ntoh24(fh->fh_s_id), ntohs(fh->fh_ox_id), status, code);
len = sizeof(*fcp);
if (status == SAM_STAT_GOOD)
len += sizeof(*info);
fp = fc_frame_alloc(lport, len);
if (!fp)
return;
fcp = fc_frame_payload_get(fp, len);
memset(fcp, 0, len);
fcp->resp.fr_status = status;
if (status == SAM_STAT_GOOD) {
fcp->ext.fr_rsp_len = htonl(sizeof(*info));
fcp->resp.fr_flags |= FCP_RSP_LEN_VAL;
info = (struct fcp_resp_rsp_info *)(fcp + 1);
info->rsp_code = code;
}
fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0);
sp = fr_seq(fp);
if (sp) {
lport->tt.seq_send(lport, sp, fp);
lport->tt.exch_done(sp);
} else {
lport->tt.frame_send(lport, fp);
}
}
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;
}
static void fc_lport_recv_req(struct fc_lport *lport,
struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
struct fc_seq *sp = fr_seq(fp);
struct fc4_prov *prov;
rcu_read_lock();
if (fh->fh_type >= FC_FC4_PROV_SIZE)
goto drop;
prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
if (!prov || !try_module_get(prov->module))
goto drop;
rcu_read_unlock();
prov->recv(lport, fp);
module_put(prov->module);
return;
drop:
rcu_read_unlock();
FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
fc_frame_free(fp);
lport->tt.exch_done(sp);
}
/**
* fc_els_resp_type() - Return a string describing the ELS response
* @fp: The frame pointer or possible error code
*/
const char *fc_els_resp_type(struct fc_frame *fp)
{
const char *msg;
struct fc_frame_header *fh;
struct fc_ct_hdr *ct;
if (IS_ERR(fp)) {
switch (-PTR_ERR(fp)) {
case FC_NO_ERR:
msg = "response no error";
break;
case FC_EX_TIMEOUT:
msg = "response timeout";
break;
case FC_EX_CLOSED:
msg = "response closed";
break;
default:
msg = "response unknown error";
break;
}
} else {
fh = fc_frame_header_get(fp);
switch (fh->fh_type) {
case FC_TYPE_ELS:
switch (fc_frame_payload_op(fp)) {
case ELS_LS_ACC:
msg = "accept";
break;
case ELS_LS_RJT:
msg = "reject";
break;
default:
msg = "response unknown ELS";
break;
}
break;
case FC_TYPE_CT:
ct = fc_frame_payload_get(fp, sizeof(*ct));
if (ct) {
switch (ntohs(ct->ct_cmd)) {
case FC_FS_ACC:
msg = "CT accept";
break;
case FC_FS_RJT:
msg = "CT reject";
break;
default:
msg = "response unknown CT";
break;
}
} else {
msg = "short CT response";
}
break;
default:
msg = "response not ELS or CT";
break;
}
}
return msg;
}
