[src/trunk]: src/sys/arch/arm/sunxi sunxi: mmc: increase max number of descri...

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

details:   https://anonhg.NetBSD.org/src/rev/9eb25d4dae54
branches:  trunk
changeset: 321504:9eb25d4dae54
user:      ryo <ryo%NetBSD.org@localhost>
date:      Mon Mar 19 08:57:57 2018 +0000

description:
sunxi: mmc: increase max number of descriptors available for DMA transfers

patch from jmcneill@

diffstat:

 sys/arch/arm/sunxi/sunxi_mmc.c |  11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diffs (39 lines):

diff -r 080625ae9c13 -r 9eb25d4dae54 sys/arch/arm/sunxi/sunxi_mmc.c
--- a/sys/arch/arm/sunxi/sunxi_mmc.c    Mon Mar 19 08:41:21 2018 +0000
+++ b/sys/arch/arm/sunxi/sunxi_mmc.c    Mon Mar 19 08:57:57 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sunxi_mmc.c,v 1.20 2018/02/19 20:26:51 jmcneill Exp $ */
+/* $NetBSD: sunxi_mmc.c,v 1.21 2018/03/19 08:57:57 ryo Exp $ */
 
 /*-
  * Copyright (c) 2014-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "opt_sunximmc.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sunxi_mmc.c,v 1.20 2018/02/19 20:26:51 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sunxi_mmc.c,v 1.21 2018/03/19 08:57:57 ryo Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -87,7 +87,7 @@
        [SUNXI_MMC_TIMING_50M_DDR_8BIT] = {  72,         72 },
 };
 
-#define SUNXI_MMC_NDESC                16
+#define SUNXI_MMC_NDESC                64
 
 struct sunxi_mmc_softc;
 
@@ -954,8 +954,9 @@
        }
        if (desc == sc->sc_idma_ndesc) {
                aprint_error_dev(sc->sc_dev,
-                   "not enough descriptors for %d byte transfer!\n",
-                   cmd->c_datalen);
+                   "not enough descriptors for %d byte transfer! "
+                   "there are %u segments with a max xfer length of %u\n",
+                   cmd->c_datalen, map->dm_nsegs, sc->sc_config->idma_xferlen);
                return EIO;
        }