[src/trunk]: src/sys/dev/pci Some alc(4) fixes:

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

details:   https://anonhg.NetBSD.org/src/rev/5938e540cca9
branches:  trunk
changeset: 464688:5938e540cca9
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Thu Oct 17 09:12:12 2019 +0000

description:
Some alc(4) fixes:

- Apply FreeBSD r218141:
 > alc_rev was used without initialization such that it failed to
 > apply AR8152 v1.0 specific initialization code. Fix this bug by
 > explicitly reading PCI device revision id via PCI accessor.
 >
 > Reported by: Gabriel Linder ( linder.gabriel <> gmail dot com )
- Apply FreeBSD r304574:
 > Correct DMA channel number selection on AR816x family of
 > controllers. For Gigabit Ethernet version of AR816x, AR813x/AR815x
 > except L1D controller, use vendor recommended ASPM parameters.
 > While here, increase alc_dma_burst array size.  Broken H/W can
 > return bogus value in theory.
- Use static.
- Whitespace fix. Remove extra backslash.

diffstat:

 sys/dev/pci/if_alc.c |  24 +++++++++++++-----------
 1 files changed, 13 insertions(+), 11 deletions(-)

diffs (80 lines):

diff -r b4c0fa2b8694 -r 5938e540cca9 sys/dev/pci/if_alc.c
--- a/sys/dev/pci/if_alc.c      Thu Oct 17 08:54:50 2019 +0000
+++ b/sys/dev/pci/if_alc.c      Thu Oct 17 09:12:12 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_alc.c,v 1.40 2019/10/15 15:59:26 msaitoh Exp $      */
+/*     $NetBSD: if_alc.c,v 1.41 2019/10/17 09:12:12 msaitoh Exp $      */
 /*     $OpenBSD: if_alc.c,v 1.1 2009/08/08 09:31:13 kevlo Exp $        */
 /*-
  * Copyright (c) 2009, Pyun YongHyeon <yongari%FreeBSD.org@localhost>
@@ -168,7 +168,7 @@
 static void    alc_txeof(struct alc_softc *);
 static void    alc_init_pcie(struct alc_softc *);
 
-uint32_t alc_dma_burst[] = { 128, 256, 512, 1024, 2048, 4096, 0 };
+static uint32_t alc_dma_burst[] = { 128, 256, 512, 1024, 2048, 4096, 0, 0 };
 
 CFATTACH_DECL_NEW(alc, sizeof(struct alc_softc),
     alc_match, alc_attach, alc_detach, NULL);
@@ -764,7 +764,6 @@
        alc_get_macaddr_par(sc);
 }
 
-
 static void
 alc_get_macaddr_par(struct alc_softc *sc)
 {
@@ -1791,7 +1790,6 @@
        return (0);
 }
 
-
 static void
 alc_dma_free(struct alc_softc *sc)
 {
@@ -2856,7 +2854,7 @@
                CSR_WRITE_4(sc, ALC_RRD1_HEAD_ADDR_LO, 0);
                CSR_WRITE_4(sc, ALC_RRD2_HEAD_ADDR_LO, 0);
                CSR_WRITE_4(sc, ALC_RRD3_HEAD_ADDR_LO, 0);
-       }\
+       }
        /* Set Rx return descriptor counter. */
        CSR_WRITE_4(sc, ALC_RRD_RING_CNT,
            (ALC_RR_RING_CNT << RRD_RING_CNT_SHIFT) & RRD_RING_CNT_MASK);
@@ -3053,13 +3051,17 @@
        reg = (RXQ_CFG_RD_BURST_DEFAULT << RXQ_CFG_RD_BURST_SHIFT) &
            RXQ_CFG_RD_BURST_MASK;
        reg |= RXQ_CFG_RSS_MODE_DIS;
-       if ((sc->alc_flags & ALC_FLAG_AR816X_FAMILY) != 0)
+       if ((sc->alc_flags & ALC_FLAG_AR816X_FAMILY) != 0) {
                reg |= (RXQ_CFG_816X_IDT_TBL_SIZE_DEFAULT <<
                    RXQ_CFG_816X_IDT_TBL_SIZE_SHIFT) &
                    RXQ_CFG_816X_IDT_TBL_SIZE_MASK;
-       if ((sc->alc_flags & ALC_FLAG_FASTETHER) == 0 &&
-           sc->alc_ident->deviceid != PCI_PRODUCT_ATTANSIC_AR8151_V2)
-               reg |= RXQ_CFG_ASPM_THROUGHPUT_LIMIT_1M;
+               if ((sc->alc_flags & ALC_FLAG_FASTETHER) == 0)
+                       reg |= RXQ_CFG_ASPM_THROUGHPUT_LIMIT_100M;
+       } else {
+               if ((sc->alc_flags & ALC_FLAG_FASTETHER) == 0 &&
+                   sc->alc_ident->deviceid != PCI_PRODUCT_ATTANSIC_AR8151_V2)
+                       reg |= RXQ_CFG_ASPM_THROUGHPUT_LIMIT_100M;
+       }
        CSR_WRITE_4(sc, ALC_RXQ_CFG, reg);
 
        /* Configure DMA parameters. */
@@ -3083,12 +3085,12 @@
                switch (AR816X_REV(sc->alc_rev)) {
                case AR816X_REV_A0:
                case AR816X_REV_A1:
-                       reg |= DMA_CFG_RD_CHNL_SEL_1;
+                       reg |= DMA_CFG_RD_CHNL_SEL_2;
                        break;
                case AR816X_REV_B0:
                        /* FALLTHROUGH */
                default:
-                       reg |= DMA_CFG_RD_CHNL_SEL_3;
+                       reg |= DMA_CFG_RD_CHNL_SEL_4;
                        break;
                }
        }