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[src/trunk]: src/sys/dev/pci msk(4): Simply keep a ring of (tx) dmamaps, rath...
details: https://anonhg.NetBSD.org/src/rev/71947e79ab6d
branches: trunk
changeset: 931731:71947e79ab6d
user: jakllsch <jakllsch%NetBSD.org@localhost>
date: Wed Apr 29 20:03:52 2020 +0000
description:
msk(4): Simply keep a ring of (tx) dmamaps, rather than a linked list
diffstat:
sys/dev/pci/if_msk.c | 69 ++++++++++++++++++------------------------------
sys/dev/pci/if_mskvar.h | 11 +------
2 files changed, 28 insertions(+), 52 deletions(-)
diffs (209 lines):
diff -r 57caeb7e391a -r 71947e79ab6d sys/dev/pci/if_msk.c
--- a/sys/dev/pci/if_msk.c Wed Apr 29 18:52:03 2020 +0000
+++ b/sys/dev/pci/if_msk.c Wed Apr 29 20:03:52 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_msk.c,v 1.104 2020/04/29 18:52:03 jakllsch Exp $ */
+/* $NetBSD: if_msk.c,v 1.105 2020/04/29 20:03:52 jakllsch Exp $ */
/* $OpenBSD: if_msk.c,v 1.79 2009/10/15 17:54:56 deraadt Exp $ */
/*
@@ -52,7 +52,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_msk.c,v 1.104 2020/04/29 18:52:03 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_msk.c,v 1.105 2020/04/29 20:03:52 jakllsch Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -1099,7 +1099,6 @@
struct sk_softc *sc = device_private(parent);
struct skc_attach_args *sa = aux;
bus_dmamap_t dmamap;
- struct sk_txmap_entry *entry;
struct ifnet *ifp;
struct mii_data * const mii = &sc_if->sk_mii;
void *kva;
@@ -1177,7 +1176,6 @@
goto fail_3;
}
- SIMPLEQ_INIT(&sc_if->sk_txmap_head);
for (i = 0; i < MSK_TX_RING_CNT; i++) {
sc_if->sk_cdata.sk_tx_chain[i].sk_mbuf = NULL;
@@ -1188,9 +1186,7 @@
goto fail_3;
}
- entry = malloc(sizeof(*entry), M_DEVBUF, M_WAITOK);
- entry->dmamap = dmamap;
- SIMPLEQ_INSERT_HEAD(&sc_if->sk_txmap_head, entry, link);
+ sc_if->sk_cdata.sk_tx_chain[i].sk_dmamap = dmamap;
}
sc_if->sk_rdata = (struct msk_ring_data *)kva;
@@ -1294,18 +1290,17 @@
{
struct sk_if_softc *sc_if = device_private(self);
struct sk_softc *sc = sc_if->sk_softc;
- struct sk_txmap_entry *entry;
struct ifnet *ifp = &sc_if->sk_ethercom.ec_if;
+ int i;
if (sc->sk_if[sc_if->sk_port] == NULL)
return 0;
msk_stop(ifp, 1);
- while ((entry = SIMPLEQ_FIRST(&sc_if->sk_txmap_head))) {
- SIMPLEQ_REMOVE_HEAD(&sc_if->sk_txmap_head, link);
- bus_dmamap_destroy(sc->sc_dmatag, entry->dmamap);
- free(entry, M_DEVBUF);
+ for (i = 0; i < MSK_TX_RING_CNT; i++) {
+ bus_dmamap_destroy(sc->sc_dmatag,
+ sc_if->sk_cdata.sk_tx_chain[i].sk_dmamap);
}
if (--sc->rnd_attached == 0)
@@ -1786,18 +1781,12 @@
uint32_t frag, cur, hiaddr, old_hiaddr, total;
uint32_t entries = 0;
size_t i;
- struct sk_txmap_entry *entry;
bus_dmamap_t txmap;
bus_addr_t addr;
DPRINTFN(2, ("msk_encap\n"));
- entry = SIMPLEQ_FIRST(&sc_if->sk_txmap_head);
- if (entry == NULL) {
- DPRINTFN(2, ("msk_encap: no txmap available\n"));
- return ENOBUFS;
- }
- txmap = entry->dmamap;
+ txmap = sc_if->sk_cdata.sk_tx_chain[*txidx].sk_dmamap;
cur = frag = *txidx;
@@ -1880,10 +1869,11 @@
}
KASSERTMSG(entries == total, "entries %u total %u", entries, total);
+ sc_if->sk_cdata.sk_tx_chain[*txidx].sk_dmamap =
+ sc_if->sk_cdata.sk_tx_chain[cur].sk_dmamap;
sc_if->sk_cdata.sk_tx_chain[cur].sk_mbuf = m_head;
- SIMPLEQ_REMOVE_HEAD(&sc_if->sk_txmap_head, link);
-
- sc_if->sk_cdata.sk_tx_map[cur] = entry;
+ sc_if->sk_cdata.sk_tx_chain[cur].sk_dmamap = txmap;
+
sc_if->sk_rdata->sk_tx_ring[cur].sk_ctl |= SK_Y2_TXCTL_LASTFRAG;
/* Sync descriptors before handing to chip */
@@ -2087,7 +2077,7 @@
struct msk_tx_desc *cur_tx;
struct ifnet *ifp = &sc_if->sk_ethercom.ec_if;
uint32_t idx, reg, sk_ctl;
- struct sk_txmap_entry *entry;
+ bus_dmamap_t dmamap;
DPRINTFN(2, ("msk_txeof\n"));
@@ -2114,15 +2104,12 @@
if (sk_ctl & SK_Y2_TXCTL_LASTFRAG)
if_statinc(ifp, if_opackets);
if (sc_if->sk_cdata.sk_tx_chain[idx].sk_mbuf != NULL) {
- entry = sc_if->sk_cdata.sk_tx_map[idx];
-
- bus_dmamap_sync(sc->sc_dmatag, entry->dmamap, 0,
- entry->dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
-
- bus_dmamap_unload(sc->sc_dmatag, entry->dmamap);
- SIMPLEQ_INSERT_TAIL(&sc_if->sk_txmap_head, entry,
- link);
- sc_if->sk_cdata.sk_tx_map[idx] = NULL;
+ dmamap = sc_if->sk_cdata.sk_tx_chain[idx].sk_dmamap;
+
+ bus_dmamap_sync(sc->sc_dmatag, dmamap, 0,
+ dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
+
+ bus_dmamap_unload(sc->sc_dmatag, dmamap);
m_freem(sc_if->sk_cdata.sk_tx_chain[idx].sk_mbuf);
sc_if->sk_cdata.sk_tx_chain[idx].sk_mbuf = NULL;
}
@@ -2611,7 +2598,7 @@
{
struct sk_if_softc *sc_if = ifp->if_softc;
struct sk_softc *sc = sc_if->sk_softc;
- struct sk_txmap_entry *dma;
+ bus_dmamap_t dmamap;
int i;
DPRINTFN(2, ("msk_stop\n"));
@@ -2664,16 +2651,12 @@
for (i = 0; i < MSK_TX_RING_CNT; i++) {
if (sc_if->sk_cdata.sk_tx_chain[i].sk_mbuf != NULL) {
- dma = sc_if->sk_cdata.sk_tx_map[i];
-
- bus_dmamap_sync(sc->sc_dmatag, dma->dmamap, 0,
- dma->dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
-
- bus_dmamap_unload(sc->sc_dmatag, dma->dmamap);
-
- SIMPLEQ_INSERT_HEAD(&sc_if->sk_txmap_head,
- sc_if->sk_cdata.sk_tx_map[i], link);
- sc_if->sk_cdata.sk_tx_map[i] = 0;
+ dmamap = sc_if->sk_cdata.sk_tx_chain[i].sk_dmamap;
+
+ bus_dmamap_sync(sc->sc_dmatag, dmamap, 0,
+ dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE);
+
+ bus_dmamap_unload(sc->sc_dmatag, dmamap);
m_freem(sc_if->sk_cdata.sk_tx_chain[i].sk_mbuf);
sc_if->sk_cdata.sk_tx_chain[i].sk_mbuf = NULL;
diff -r 57caeb7e391a -r 71947e79ab6d sys/dev/pci/if_mskvar.h
--- a/sys/dev/pci/if_mskvar.h Wed Apr 29 18:52:03 2020 +0000
+++ b/sys/dev/pci/if_mskvar.h Wed Apr 29 20:03:52 2020 +0000
@@ -1,5 +1,5 @@
/* $OpenBSD: if_mskvar.h,v 1.3 2006/12/28 16:34:42 kettenis Exp $ */
-/* $NetBSD: if_mskvar.h,v 1.24 2020/04/29 18:52:03 jakllsch Exp $ */
+/* $NetBSD: if_mskvar.h,v 1.25 2020/04/29 20:03:52 jakllsch Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
@@ -90,6 +90,7 @@
struct sk_chain {
struct mbuf *sk_mbuf;
+ bus_dmamap_t sk_dmamap;
};
/*
@@ -101,16 +102,9 @@
*/
#define SK_NTXSEG 30
-struct sk_txmap_entry {
- bus_dmamap_t dmamap;
- SIMPLEQ_ENTRY(sk_txmap_entry) link;
-};
-
struct msk_chain_data {
struct sk_chain sk_tx_chain[MSK_TX_RING_CNT];
struct sk_chain sk_rx_chain[MSK_RX_RING_CNT];
- struct sk_txmap_entry *sk_tx_map[MSK_TX_RING_CNT];
- bus_dmamap_t sk_rx_map[MSK_RX_RING_CNT];
bus_dmamap_t sk_rx_jumbo_map;
unsigned sk_tx_prod;
unsigned sk_tx_cons;
@@ -241,7 +235,6 @@
kmutex_t sk_jpool_mtx;
LIST_HEAD(__sk_jfreehead, sk_jpool_entry) sk_jfree_listhead;
LIST_HEAD(__sk_jinusehead, sk_jpool_entry) sk_jinuse_listhead;
- SIMPLEQ_HEAD(__sk_txmaphead, sk_txmap_entry) sk_txmap_head;
};
struct skc_attach_args {
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