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device: Rework bus master option 

As an intermediate step for CB:45150, add an additional Kconfig option
which is used to configure bus mastering for any devices and use
PCI_ALLOW_BUS_MASTER to allow coreboot setting the bus mastering bit in
general.

Change-Id: I33b37a79022007a16e97350db61575b63fa8256b
Signed-off-by: Felix Singer <felix.singer@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45149
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Felix Singer 2020-09-07 13:57:49 +02:00 committed by Patrick Georgi
parent d7511f8054
commit 3d9fa08bf1
2 changed files with 12 additions and 1 deletions
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11
src/device/Kconfig
View File

@ -532,6 +532,17 @@ config PCI_ALLOW_BUS_MASTER
instance, for libpayload based payloads as the drivers don't enable
bus mastering for PCI bridges.
if PCI_ALLOW_BUS_MASTER
config PCI_ALLOW_BUS_MASTER_ANY_DEVICE
bool "Any devices"
default y
help
Allow coreboot to enable PCI bus mastering for any device. The actual
selection of devices depends on the various PCI drivers in coreboot.
endif # PCI_ALLOW_BUS_MASTER
endif # PCI
if PCIEXP_PLUGIN_SUPPORT

2
src/include/device/pci.h
View File

@ -144,7 +144,7 @@ void pci_dev_request_bus_master(pci_devfn_t dev)
void pci_dev_request_bus_master(struct device *dev)
#endif /* ENV_PCI_SIMPLE_DEVICE */
{
if (CONFIG(PCI_ALLOW_BUS_MASTER))
if (CONFIG(PCI_ALLOW_BUS_MASTER_ANY_DEVICE))
pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
}