[src/trunk]: src/sys/dev/ic Make sure to ack IS after PxIS when polling and w...

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

details:   https://anonhg.NetBSD.org/src/rev/7a1224edcbc3
branches:  trunk
changeset: 958188:7a1224edcbc3
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Mon Dec 28 11:05:54 2020 +0000

description:
Make sure to ack IS after PxIS when polling and when using multiple MSI-X
messages.

diffstat:

 sys/dev/ic/ahcisata_core.c |  25 ++++++++++++++++++++-----
 1 files changed, 20 insertions(+), 5 deletions(-)

diffs (67 lines):

diff -r 2b592dad5d60 -r 7a1224edcbc3 sys/dev/ic/ahcisata_core.c
--- a/sys/dev/ic/ahcisata_core.c        Mon Dec 28 10:26:23 2020 +0000
+++ b/sys/dev/ic/ahcisata_core.c        Mon Dec 28 11:05:54 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ahcisata_core.c,v 1.90 2020/12/27 15:13:07 jmcneill Exp $      */
+/*     $NetBSD: ahcisata_core.c,v 1.91 2020/12/28 11:05:54 jmcneill Exp $      */
 
 /*
  * Copyright (c) 2006 Manuel Bouyer.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.90 2020/12/27 15:13:07 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ahcisata_core.c,v 1.91 2020/12/28 11:05:54 jmcneill Exp $");
 
 #include <sys/types.h>
 #include <sys/malloc.h>
@@ -84,6 +84,7 @@
                                int, int);
 static void ahci_channel_recover(struct ata_channel *, int, uint32_t);
 static int  ahci_dma_setup(struct ata_channel *, int, void *, size_t, int);
+static int ahci_intr_port_common(struct ata_channel *);
 
 #if NATAPIBUS > 0
 static void ahci_atapibus_attach(struct atabus_softc *);
@@ -602,7 +603,7 @@
                ports = is;
                while ((bit = ffs(ports)) != 0) {
                        bit--;
-                       ahci_intr_port(&sc->sc_channels[bit]);
+                       ahci_intr_port_common(&sc->sc_channels[bit].ata_channel);
                        ports &= ~(1U << bit);
                }
                AHCI_WRITE(sc, AHCI_IS, is);
@@ -617,6 +618,20 @@
        struct ahci_channel *achp = v;
        struct ata_channel *chp = &achp->ata_channel;
        struct ahci_softc *sc = (struct ahci_softc *)chp->ch_atac;
+       int ret;
+
+       ret = ahci_intr_port_common(chp);
+       if (ret) {
+               AHCI_WRITE(sc, AHCI_IS, 1U << chp->ch_channel);
+       }
+
+       return ret;
+}
+
+static int
+ahci_intr_port_common(struct ata_channel *chp)
+{
+       struct ahci_softc *sc = (struct ahci_softc *)chp->ch_atac;
        uint32_t is, tfd, sact;
        struct ata_xfer *xfer;
        int slot = -1;
@@ -626,8 +641,8 @@
        is = AHCI_READ(sc, AHCI_P_IS(chp->ch_channel));
        AHCI_WRITE(sc, AHCI_P_IS(chp->ch_channel), is);
 
-       AHCIDEBUG_PRINT((
-           "ahci_intr_port %s port %d is 0x%x CI 0x%x SACT 0x%x TFD 0x%x\n",
+       AHCIDEBUG_PRINT(("ahci_intr_port_common %s port %d "
+           "is 0x%x CI 0x%x SACT 0x%x TFD 0x%x\n",
            AHCINAME(sc),
            chp->ch_channel, is,
            AHCI_READ(sc, AHCI_P_CI(chp->ch_channel)),