[src/trunk]: src/sys/arch/mips/cavium/dev Set and clear IFF_OACTIVE as necess...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c08a79e35672
branches:  trunk
changeset: 828790:c08a79e35672
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Jan 01 13:25:22 2018 +0000

description:
Set and clear IFF_OACTIVE as necessary, and add support for queueing
multiple packets before performing a PKO doorbell write.

diffstat:

 sys/arch/mips/cavium/dev/if_cnmac.c |  40 ++++++++++++++++++++++++------------
 1 files changed, 26 insertions(+), 14 deletions(-)

diffs (166 lines):

diff -r e7e182c35734 -r c08a79e35672 sys/arch/mips/cavium/dev/if_cnmac.c
--- a/sys/arch/mips/cavium/dev/if_cnmac.c       Mon Jan 01 12:46:49 2018 +0000
+++ b/sys/arch/mips/cavium/dev/if_cnmac.c       Mon Jan 01 13:25:22 2018 +0000
@@ -1,8 +1,8 @@
-/*     $NetBSD: if_cnmac.c,v 1.7 2017/11/26 18:41:14 jmcneill Exp $    */
+/*     $NetBSD: if_cnmac.c,v 1.8 2018/01/01 13:25:22 jmcneill Exp $    */
 
 #include <sys/cdefs.h>
 #if 0
-__KERNEL_RCSID(0, "$NetBSD: if_cnmac.c,v 1.7 2017/11/26 18:41:14 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_cnmac.c,v 1.8 2018/01/01 13:25:22 jmcneill Exp $");
 #endif
 
 #include "opt_octeon.h"
@@ -144,7 +144,7 @@
 static void    octeon_eth_start(struct ifnet *);
 
 static inline int      octeon_eth_send_cmd(struct octeon_eth_softc *, uint64_t,
-                           uint64_t);
+                           uint64_t, int *);
 static inline uint64_t octeon_eth_send_makecmd_w1(int, paddr_t);
 static inline uint64_t         octeon_eth_send_makecmd_w0(uint64_t, uint64_t, size_t,
                            int);
@@ -153,9 +153,9 @@
 static inline int      octeon_eth_send_makecmd(struct octeon_eth_softc *,
                            struct mbuf *, uint64_t *, uint64_t *, uint64_t *);
 static inline int      octeon_eth_send_buf(struct octeon_eth_softc *,
-                           struct mbuf *, uint64_t *);
+                           struct mbuf *, uint64_t *, int *);
 static inline int      octeon_eth_send(struct octeon_eth_softc *,
-                           struct mbuf *);
+                           struct mbuf *, int *);
 
 static int     octeon_eth_reset(struct octeon_eth_softc *);
 static int     octeon_eth_configure(struct octeon_eth_softc *);
@@ -615,6 +615,7 @@
 static inline void
 octeon_eth_send_queue_flush(struct octeon_eth_softc *sc)
 {
+       struct ifnet *ifp = &sc->sc_ethercom.ec_if;
        const int64_t sent_count = sc->sc_hard_done_cnt;
        int i;
 
@@ -631,6 +632,8 @@
                OCTEON_EVCNT_INC(sc, txbufgbput);
 
                m_freem(m);
+
+               CLR(ifp->if_flags, IFF_OACTIVE);
        }
 
        octeon_fau_op_inc_fetch_8(&sc->sc_fau_done, i);
@@ -972,7 +975,7 @@
 
 static inline int
 octeon_eth_send_cmd(struct octeon_eth_softc *sc, uint64_t pko_cmd_w0,
-    uint64_t pko_cmd_w1)
+    uint64_t pko_cmd_w1, int *pwdc)
 {
        uint64_t *cmdptr;
        int result = 0;
@@ -1011,7 +1014,7 @@
                sc->sc_cmdptr.cmdptr_idx += 2;
        }
 
-       octeon_pko_op_doorbell_write(sc->sc_port, sc->sc_port, 2);
+       *pwdc += 2;
 
 done:
        return result;
@@ -1019,7 +1022,7 @@
 
 static inline int
 octeon_eth_send_buf(struct octeon_eth_softc *sc, struct mbuf *m,
-    uint64_t *gbuf)
+    uint64_t *gbuf, int *pwdc)
 {
        int result = 0, error;
        uint64_t pko_cmd_w0, pko_cmd_w1;
@@ -1032,7 +1035,7 @@
                goto done;
        }
 
-       error = octeon_eth_send_cmd(sc, pko_cmd_w0, pko_cmd_w1);
+       error = octeon_eth_send_cmd(sc, pko_cmd_w0, pko_cmd_w1, pwdc);
        if (error != 0) {
                /* already logging */
                OCTEON_EVCNT_INC(sc, txerrcmd);
@@ -1044,7 +1047,7 @@
 }
 
 static inline int
-octeon_eth_send(struct octeon_eth_softc *sc, struct mbuf *m)
+octeon_eth_send(struct octeon_eth_softc *sc, struct mbuf *m, int *pwdc)
 {
        paddr_t gaddr = 0;
        uint64_t *gbuf = NULL;
@@ -1072,7 +1075,7 @@
 
        OCTEON_ETH_KASSERT(gbuf != NULL);
 
-       error = octeon_eth_send_buf(sc, m, gbuf);
+       error = octeon_eth_send_buf(sc, m, gbuf, pwdc);
        if (error != 0) {
                /* already logging */
                octeon_fpa_buf_put_paddr(octeon_eth_fb_sg, gaddr);
@@ -1092,6 +1095,7 @@
 {
        struct octeon_eth_softc *sc = ifp->if_softc;
        struct mbuf *m;
+       int wdc = 0;
 
        /*
         * performance tuning
@@ -1130,6 +1134,10 @@
                 * and bail out.
                 */
                if (octeon_eth_send_queue_is_full(sc)) {
+                       SET(ifp->if_flags, IFF_OACTIVE);
+                       if (wdc > 0)
+                               octeon_pko_op_doorbell_write(sc->sc_port,
+                                   sc->sc_port, wdc);
                        return;
                }
                /* XXX XXX XXX */
@@ -1141,7 +1149,7 @@
                /* XXX XXX XXX */
                if (sc->sc_soft_req_cnt > sc->sc_soft_req_thresh)
                        octeon_eth_send_queue_flush(sc);
-               if (octeon_eth_send(sc, m)) {
+               if (octeon_eth_send(sc, m, &wdc)) {
                        IF_DROP(&ifp->if_snd);
                        m_freem(m);
                        log(LOG_WARNING,
@@ -1161,6 +1169,9 @@
                octeon_eth_send_queue_flush_prefetch(sc);
        }
 
+       if (wdc > 0)
+               octeon_pko_op_doorbell_write(sc->sc_port, sc->sc_port, wdc);
+
 /*
  * Don't schedule send-buffer-free callout every time - those buffers are freed
  * by "free tick".  This makes some packets like NFS slower.
@@ -1528,7 +1539,7 @@
 {
        struct octeon_eth_softc *rsc = ifp->if_softc;
        struct octeon_eth_softc *sc = NULL;
-       int i;
+       int i, wdc = 0;
 
        for (i = 0; i < 3 /* XXX */; i++) {
                if (rsc->sc_redir & (1 << i))
@@ -1550,10 +1561,11 @@
        if (sc->sc_soft_req_cnt > sc->sc_soft_req_thresh)
                octeon_eth_send_queue_flush(sc);
 
-       if (octeon_eth_send(sc, m)) {
+       if (octeon_eth_send(sc, m, &wdc)) {
                IF_DROP(&ifp->if_snd);
                m_freem(m);
        } else {
+               octeon_pko_op_doorbell_write(sc->sc_port, sc->sc_port, wdc);
                sc->sc_soft_req_cnt++;
        }