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cxgbe(4): Add support for netmap offsets.

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PR:		253069
MFC after:	1 week
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2024-01-04 17:39:31 -08:00
parent 20010b86fe
commit df8a58b17a
1 changed files with 11 additions and 3 deletions
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14
sys/dev/cxgbe/t4_netmap.c
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@ -1003,7 +1003,7 @@ cxgbe_nm_tx(struct adapter *sc, struct sge_nm_txq *nm_txq,
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
V_ULPTX_NSGE(1));
usgl->len0 = htobe32(slot->len);
usgl->addr0 = htobe64(ba);
usgl->addr0 = htobe64(ba + nm_get_offset(kring, slot));
slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
cpl = (void *)(usgl + 1);
@ -1269,7 +1269,7 @@ cxgbe_nm_attach(struct vi_info *vi)
bzero(&na, sizeof(na));
na.ifp = vi->ifp;
na.na_flags = NAF_BDG_MAYSLEEP;
na.na_flags = NAF_BDG_MAYSLEEP | NAF_OFFSETS;
/* Netmap doesn't know about the space reserved for the status page. */
na.num_tx_desc = vi->qsize_txq - sc->params.sge.spg_len / EQ_ESIZE;
@ -1286,7 +1286,7 @@ cxgbe_nm_attach(struct vi_info *vi)
na.nm_register = cxgbe_netmap_reg;
na.num_tx_rings = vi->nnmtxq;
na.num_rx_rings = vi->nnmrxq;
na.rx_buf_maxsize = MAX_MTU;
na.rx_buf_maxsize = MAX_MTU + sc->params.sge.fl_pktshift;
netmap_attach(&na); /* This adds IFCAP_NETMAP to if_capabilities */
}
@ -1368,6 +1368,14 @@ service_nm_rxq(struct sge_nm_rxq *nm_rxq)
handle_nm_sge_egr_update(sc, ifp, cpl);
break;
case CPL_RX_PKT:
/*
* Note that the application must have netmap
* offsets (NETMAP_REQ_OPT_OFFSETS) enabled on
* the ring or its rx will not work correctly
* when fl_pktshift > 0.
*/
nm_write_offset(kring, &ring->slot[fl_cidx],
sc->params.sge.fl_pktshift);
ring->slot[fl_cidx].len = G_RSPD_LEN(lq) -
sc->params.sge.fl_pktshift;
ring->slot[fl_cidx].flags = 0;