Author: np
Date: Tue Aug 25 02:42:07 2020
New Revision: 364748
URL: https://svnweb.freebsd.org/changeset/base/364748
Log:
MFC r362532:
cxgbe(4): Add a tx_len16_to_desc helper.
No functional change.
Sponsored by: Chelsio Communications
Modified:
stable/12/sys/dev/cxgbe/adapter.h
stable/12/sys/dev/cxgbe/t4_sge.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/dev/cxgbe/adapter.h
==============================================================================
--- stable/12/sys/dev/cxgbe/adapter.h Tue Aug 25 02:22:49 2020
(r364747)
+++ stable/12/sys/dev/cxgbe/adapter.h Tue Aug 25 02:42:07 2020
(r364748)
@@ -1313,4 +1313,12 @@ write_via_memwin(struct adapter *sc, int idx, uint32_t
return (rw_via_memwin(sc, idx, addr, (void *)(uintptr_t)val, len, 1));
}
+
+/* Number of len16 -> number of descriptors */
+static inline int
+tx_len16_to_desc(int len16)
+{
+
+ return (howmany(len16, EQ_ESIZE / 16));
+}
#endif
Modified: stable/12/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- stable/12/sys/dev/cxgbe/t4_sge.c Tue Aug 25 02:22:49 2020
(r364747)
+++ stable/12/sys/dev/cxgbe/t4_sge.c Tue Aug 25 02:42:07 2020
(r364748)
@@ -2522,7 +2522,7 @@ start_wrq_wr(struct sge_wrq *wrq, int len16, struct wr
void *w;
MPASS(len16 > 0);
- ndesc = howmany(len16, EQ_ESIZE / 16);
+ ndesc = tx_len16_to_desc(len16);
MPASS(ndesc > 0 && ndesc <= SGE_MAX_WR_NDESC);
EQ_LOCK(eq);
@@ -2734,9 +2734,9 @@ eth_tx(struct mp_ring *r, u_int cidx, u_int pidx)
M_ASSERTPKTHDR(m0);
MPASS(m0->m_nextpkt == NULL);
- if (available < SGE_MAX_WR_NDESC) {
+ if (available < tx_len16_to_desc(mbuf_len16(m0))) {
available += reclaim_tx_descs(txq, 64);
- if (available < howmany(mbuf_len16(m0), EQ_ESIZE / 16))
+ if (available < tx_len16_to_desc(mbuf_len16(m0)))
break; /* out of descriptors */
}
@@ -4440,7 +4440,7 @@ write_txpkt_vm_wr(struct adapter *sc, struct sge_txq *
ctrl = sizeof(struct cpl_tx_pkt_core);
if (needs_tso(m0))
ctrl += sizeof(struct cpl_tx_pkt_lso_core);
- ndesc = howmany(len16, EQ_ESIZE / 16);
+ ndesc = tx_len16_to_desc(len16);
MPASS(ndesc <= available);
/* Firmware work request header */
@@ -4551,7 +4551,7 @@ write_raw_wr(struct sge_txq *txq, void *wr, struct mbu
int len16, ndesc;
len16 = mbuf_len16(m0);
- ndesc = howmany(len16, EQ_ESIZE / 16);
+ ndesc = tx_len16_to_desc(len16);
MPASS(ndesc <= available);
dst = wr;
@@ -4603,7 +4603,7 @@ write_txpkt_wr(struct adapter *sc, struct sge_txq *txq
sizeof(struct cpl_tx_pkt_core) + pktlen, 16);
nsegs = 0;
}
- ndesc = howmany(len16, EQ_ESIZE / 16);
+ ndesc = tx_len16_to_desc(len16);
MPASS(ndesc <= available);
/* Firmware work request header */
@@ -4709,7 +4709,7 @@ try_txpkts(struct mbuf *m, struct mbuf *n, struct txpk
l2 = txpkts0_len16(nsegs2);
}
txp->len16 = howmany(sizeof(struct fw_eth_tx_pkts_wr), 16) + l1 + l2;
- needed = howmany(txp->len16, EQ_ESIZE / 16);
+ needed = tx_len16_to_desc(txp->len16);
if (needed > SGE_MAX_WR_NDESC || needed > available)
return (1);
@@ -4743,7 +4743,7 @@ add_to_txpkts(struct mbuf *m, struct txpkts *txp, u_in
len16 = txpkts0_len16(nsegs);
else
len16 = txpkts1_len16();
- needed = howmany(txp->len16 + len16, EQ_ESIZE / 16);
+ needed = tx_len16_to_desc(txp->len16 + len16);
if (needed > SGE_MAX_WR_NDESC || needed > available)
return (1);
@@ -4784,7 +4784,7 @@ write_txpkts_wr(struct adapter *sc, struct sge_txq *tx
MPASS(txp->len16 <= howmany(SGE_MAX_WR_LEN, 16));
MPASS(available > 0 && available < eq->sidx);
- ndesc = howmany(txp->len16, EQ_ESIZE / 16);
+ ndesc = tx_len16_to_desc(txp->len16);
MPASS(ndesc <= available);
MPASS(wr == (void *)&eq->desc[eq->pidx]);
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