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device: Rework bus master option

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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 instance, for libpayload based payloads as the drivers don't enable
bus mastering for PCI bridges. 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 endif # PCI
if PCIEXP_PLUGIN_SUPPORT 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) void pci_dev_request_bus_master(struct device *dev)
#endif /* ENV_PCI_SIMPLE_DEVICE */ #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); pci_or_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER);
} }