diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2016-04-30 11:32:24 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2016-04-30 11:32:24 +0000 |
| commit | 8b7825f07a90ab9de5e477caf9c60a0a426d5b66 (patch) | |
| tree | 850893dd63ff9eeeb3102bbc7eba53e48336513b /sys/dev/pci/sdhc_pci.c | |
| parent | ecef7a2ce61bca18b808b58acff08fc034626f37 (diff) | |
Implement DMA support. Bits and pieces taken from NetBSD, but we only
support ADMA2. The older SDMA mode has too many limitations to be really
usable. Gives us only moderate speed improvements, bus reduces the CPU load
considerably. We will reap the full benefits once we implement wider bus
widths and high speed modes.
There is a remining issue with simultanious use of eMMC and external SD card
on (some) Intel Bay Trail hardware. Still under investigation.
ok patrick@, stsp@, deraadt@
Diffstat (limited to 'sys/dev/pci/sdhc_pci.c')
| -rw-r--r-- | sys/dev/pci/sdhc_pci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/pci/sdhc_pci.c b/sys/dev/pci/sdhc_pci.c index 4f5b8c19e10..d1b6688f573 100644 --- a/sys/dev/pci/sdhc_pci.c +++ b/sys/dev/pci/sdhc_pci.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sdhc_pci.c,v 1.19 2015/11/24 19:38:01 kettenis Exp $ */ +/* $OpenBSD: sdhc_pci.c,v 1.20 2016/04/30 11:32:23 kettenis Exp $ */ /* * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org> @@ -149,6 +149,7 @@ sdhc_pci_attach(struct device *parent, struct device *self, void *aux) /* Enable use of DMA if supported by the interface. */ usedma = PCI_INTERFACE(pa->pa_class) == SDHC_PCI_INTERFACE_DMA; + sc->sc.sc_dmat = pa->pa_dmat; /* * Map and attach all hosts supported by the host controller. |