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sys/dev/cxgbe/cxgbei/icl_cxgbei.c
| Show First 20 Lines • Show All 1,058 Lines • ▼ Show 20 Lines | #ifdef INVARIANTS | ||||
| MPASS(ic == ip->ip_conn); | MPASS(ic == ip->ip_conn); | ||||
| MPASS(ip->ip_bhs_mbuf != NULL); | MPASS(ip->ip_bhs_mbuf != NULL); | ||||
| #endif | #endif | ||||
| first_burst = icl_pdu_data_segment_length(ip); | first_burst = icl_pdu_data_segment_length(ip); | ||||
| /* | /* | ||||
| * Note that ICL calls conn_transfer_setup even if the first | * Note that ICL calls conn_transfer_setup even if the first | ||||
| * burst had everything and there's nothing left to transfer. | * burst had everything and there's nothing left to transfer. | ||||
| * | |||||
| * NB: The CTL frontend might have provided a buffer | |||||
| * whose length (kern_data_len) is smaller than the | |||||
| * FirstBurstLength of unsolicited data. Treat those | |||||
| * as an empty transfer. | |||||
| */ | */ | ||||
| MPASS(ctsio->kern_data_len >= first_burst); | |||||
| xferlen = ctsio->kern_data_len; | xferlen = ctsio->kern_data_len; | ||||
| if (xferlen - first_burst < ci->ddp_threshold) { | if (xferlen < first_burst || | ||||
| xferlen - first_burst < ci->ddp_threshold) { | |||||
| no_ddp: | no_ddp: | ||||
| /* | /* | ||||
| * No DDP for this transfer. Allocate a TTT (based on | * No DDP for this transfer. Allocate a TTT (based on | ||||
| * the one passed in) that cannot be a valid hardware | * the one passed in) that cannot be a valid hardware | ||||
| * DDP tag in the iSCSI region. | * DDP tag in the iSCSI region. | ||||
| */ | */ | ||||
| ttt = *tttp & M_PPOD_TAG; | ttt = *tttp & M_PPOD_TAG; | ||||
| ttt = V_PPOD_TAG(ttt) | pr->pr_invalid_bit; | ttt = V_PPOD_TAG(ttt) | pr->pr_invalid_bit; | ||||
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