/*
* 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;
}
/*
* 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;
}
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;
}
