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Limit DMA to below 4GB - the supported controllers are limited this 

way.

Thanks to jmcneill for a version of this patch.
This commit is contained in:
skrll 2024-02-09 08:50:52 +00:00
parent b79a03bee5
commit 6499c89471
1 changed files with 12 additions and 3 deletions
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15
sys/dev/fdt/dwcmmc_fdt.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: dwcmmc_fdt.c,v 1.21 2024/02/09 06:28:50 skrll Exp $ */
/* $NetBSD: dwcmmc_fdt.c,v 1.22 2024/02/09 08:50:52 skrll Exp $ */
/*-
* Copyright (c) 2015-2018 Jared McNeill <jmcneill@invisible.ca>
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dwcmmc_fdt.c,v 1.21 2024/02/09 06:28:50 skrll Exp $");
__KERNEL_RCSID(0, "$NetBSD: dwcmmc_fdt.c,v 1.22 2024/02/09 08:50:52 skrll Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@ -149,7 +149,16 @@ dwcmmc_fdt_attach(device_t parent, device_t self, void *aux)
sc->sc_dev = self;
sc->sc_bst = faa->faa_bst;
sc->sc_dmat = faa->faa_dmat;
if (sizeof(bus_addr_t) > 4) {
error = bus_dmatag_subregion(faa->faa_dmat, 0, __MASK(32),
&sc->sc_dmat, BUS_DMA_WAITOK);
if (error != 0) {
aprint_error(": couldn't create DMA tag: %d\n", error);
return;
}
} else {
sc->sc_dmat = faa->faa_dmat;
}
error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh);
if (error) {
aprint_error(": couldn't map %#" PRIx64 ": %d\n",