diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2018-05-20 10:31:23 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-01-04 12:14:42 +0000 |
| commit | ad7674ed00a810b472b2f66b3f5b2e0edbea02de (patch) | |
| tree | bca4a0a51a7b9563f59aea0cd1fffc309eeaf753 /src/device | |
| parent | e3682b6c1c14c8ad2253a3e5d19fb7dfe417c018 (diff) | |
| download | coreboot-ad7674ed00a810b472b2f66b3f5b2e0edbea02de.tar.xz | |
device: Introduce pcidev_on_root() and friends
Semantics of dev_find_slot() are ill in the sense that
it only works after device enumeration has completed in
ramstage. Plan is to declare it as deprecated.
Introduce pcidev_on_root() and pcidev_path_on_root()
functions to replace cases where this was called with
static argument bus == 0. New implementation only walks
the root bus of the PCI tree, while old one walked
the entire linked list of devices.
Introduce pcidev_path_behind() to replace cases where
argument bus != 0. The required parent node is typically
one of the PCIe root functions that you locate using
pcidev_on_root() above.
New forms are safe to use with early devicetree and
before PCI bus numbers have been assigned.
Change-Id: Ie20598d48b4cf6e35e45fc90804bad4728437fc6
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/26447
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/device_const.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c index 90b68679e9..ec128e877d 100644 --- a/src/device/device_const.c +++ b/src/device/device_const.c @@ -22,6 +22,7 @@ #include <device/device.h> #include <device/path.h> #include <device/pci.h> +#include <device/pci_def.h> #include <device/resource.h> /** Linked list of ALL devices */ @@ -172,6 +173,31 @@ DEVTREE_CONST struct device *find_dev_path( return child; } +DEVTREE_CONST struct device *pcidev_path_behind( + const struct bus *parent, pci_devfn_t devfn) +{ + const struct device_path path = { + .type = DEVICE_PATH_PCI, + .pci.devfn = devfn, + }; + return find_dev_path(parent, &path); +} + +DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn) +{ + DEVTREE_CONST struct device *pci_domain; + + pci_domain = dev_find_path(NULL, DEVICE_PATH_DOMAIN); + if (!pci_domain) + return NULL; + return pcidev_path_behind(pci_domain->link_list, devfn); +} + +DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn) +{ + return pcidev_path_on_root(PCI_DEVFN(dev, fn)); +} + /** * Given an SMBus bus and a device number, find the device structure. * |