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Devices behind downstream bridges should still get DMAR protection.

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Reviewed by:	kib
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D19717
This commit is contained in:
Tycho Nightingale 2019-04-01 19:08:05 +00:00
parent 1a22fb3f5e
commit b2bbb74489
1 changed files with 22 additions and 0 deletions
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22
sys/dev/pci/pci.c
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@ -31,6 +31,7 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_acpi.h"
#include "opt_bus.h"
#include <sys/param.h>
@ -5693,6 +5694,26 @@ pci_get_resource_list (device_t dev, device_t child)
return (&dinfo->resources);
}
#ifdef ACPI_DMAR
bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
bus_dma_tag_t
pci_get_dma_tag(device_t bus, device_t dev)
{
bus_dma_tag_t tag;
struct pci_softc *sc;
if (device_get_parent(dev) == bus) {
/* try dmar and return if it works */
tag = dmar_get_dma_tag(bus, dev);
} else
tag = NULL;
if (tag == NULL) {
sc = device_get_softc(bus);
tag = sc->sc_dma_tag;
}
return (tag);
}
#else
bus_dma_tag_t
pci_get_dma_tag(device_t bus, device_t dev)
{
@ -5700,6 +5721,7 @@ pci_get_dma_tag(device_t bus, device_t dev)
return (sc->sc_dma_tag);
}
#endif
uint32_t
pci_read_config_method(device_t dev, device_t child, int reg, int width)