Date: Wed, 28 Oct 2015 05:11:06 +0000 (UTC) From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r290090 - head/sys/mips/atheros Message-ID: <201510280511.t9S5B6es009506@repo.freebsd.org>
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Author: adrian Date: Wed Oct 28 05:11:06 2015 New Revision: 290090 URL: https://svnweb.freebsd.org/changeset/base/290090 Log: Add some debugging code (under ARGE_DEBUG) that counts each interrupt source. This should make it easier to track down interrupt storms from arge. Tested: * AP135 (QCA955x) SoC - defaults to ARGE_DEBUG enabled * Carambola2 (AR9331 SoC) - defaults to ARGE_DEBUG disabled Modified: head/sys/mips/atheros/if_arge.c head/sys/mips/atheros/if_argevar.h Modified: head/sys/mips/atheros/if_arge.c ============================================================================== --- head/sys/mips/atheros/if_arge.c Wed Oct 28 03:43:24 2015 (r290089) +++ head/sys/mips/atheros/if_arge.c Wed Oct 28 05:11:06 2015 (r290090) @@ -277,6 +277,28 @@ arge_probe(device_t dev) return (BUS_PROBE_NOWILDCARD); } +#ifdef ARGE_DEBUG +static void +arge_attach_intr_sysctl(device_t dev, struct sysctl_oid_list *parent) +{ + struct arge_softc *sc = device_get_softc(dev); + struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev); + struct sysctl_oid *tree = device_get_sysctl_tree(dev); + struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree); + char sn[8]; + int i; + + tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "intr", + CTLFLAG_RD, NULL, "Interrupt statistics"); + child = SYSCTL_CHILDREN(tree); + for (i = 0; i < 32; i++) { + snprintf(sn, sizeof(sn), "%d", i); + SYSCTL_ADD_UINT(ctx, child, OID_AUTO, sn, CTLFLAG_RD, + &sc->intr_stats.count[i], 0, ""); + } +} +#endif + static void arge_attach_sysctl(device_t dev) { @@ -288,6 +310,7 @@ arge_attach_sysctl(device_t dev) SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "debug", CTLFLAG_RW, &sc->arge_debug, 0, "arge interface debugging flags"); + arge_attach_intr_sysctl(dev, SYSCTL_CHILDREN(tree)); #endif SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, @@ -2440,6 +2463,9 @@ arge_intr(void *arg) struct arge_softc *sc = arg; uint32_t status; struct ifnet *ifp = sc->arge_ifp; +#ifdef ARGE_DEBUG + int i; +#endif status = ARGE_READ(sc, AR71XX_DMA_INTR_STATUS); status |= sc->arge_intr_status; @@ -2456,6 +2482,14 @@ arge_intr(void *arg) return; } +#ifdef ARGE_DEBUG + for (i = 0; i < 32; i++) { + if (status & (1 << i)) { + sc->intr_stats.count[1 << i]++; + } + } +#endif + if (status & DMA_INTR_RX_BUS_ERROR) { ARGE_WRITE(sc, AR71XX_DMA_RX_STATUS, DMA_RX_STATUS_BUS_ERROR); device_printf(sc->arge_dev, "RX bus error"); Modified: head/sys/mips/atheros/if_argevar.h ============================================================================== --- head/sys/mips/atheros/if_argevar.h Wed Oct 28 03:43:24 2015 (r290089) +++ head/sys/mips/atheros/if_argevar.h Wed Oct 28 05:11:06 2015 (r290090) @@ -214,6 +214,9 @@ struct arge_softc { uint32_t intr_stray2; uint32_t intr_ok; } stats; + struct { + uint32_t count[32]; + } intr_stats; }; #endif /* __IF_ARGEVAR_H__ */
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