diff options
| author | Furquan Shaikh <furquan@google.com> | 2020-04-16 08:25:58 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2020-04-22 18:02:00 +0000 |
| commit | 7778e5c55fbf1399a7d80aac38890a8351fcc573 (patch) | |
| tree | 452f4315a2fe12f4f9f7d76d6fbf0e93711c9f62 /src | |
| parent | 86803784d3a459170a1e73dfbd1ecdcfc0d853d5 (diff) | |
device: Add a helper to find device behind a PCI-to-PCI bridge device
This change adds a helper function to find PCI device with dev# and
function# behind a PCI-to-PCI bridge device.
BUG=b:153858769
BRANCH=None
TEST=None
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: Ie5672b35cda66431a0f1977f217bdf61d3012ace
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40474
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/device/device_const.c | 13 | ||||
| -rw-r--r-- | src/include/device/device.h | 4 |
2 files changed, 17 insertions, 0 deletions
diff --git a/src/device/device_const.c b/src/device/device_const.c index 2e0ccc4c3b..de404dc0d1 100644 --- a/src/device/device_const.c +++ b/src/device/device_const.c @@ -232,6 +232,19 @@ DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn) return pcidev_path_on_root(PCI_DEVFN(dev, fn)); } +DEVTREE_CONST struct device *pcidev_path_behind_pci2pci_bridge( + const struct device *bridge, + pci_devfn_t devfn) +{ + if (!bridge || (bridge->path.type != DEVICE_PATH_PCI)) { + assert(0); + /* Return NULL in case asserts are non-fatal. */ + return NULL; + } + + return pcidev_path_behind(bridge->link_list, devfn); +} + DEVTREE_CONST struct device *pcidev_path_on_root_debug(pci_devfn_t devfn, const char *func) { DEVTREE_CONST struct device *dev = pcidev_path_on_root(devfn); diff --git a/src/include/device/device.h b/src/include/device/device.h index 4e9c594bc0..a33702a234 100644 --- a/src/include/device/device.h +++ b/src/include/device/device.h @@ -293,6 +293,10 @@ DEVTREE_CONST struct device *pcidev_path_on_root(pci_devfn_t devfn); DEVTREE_CONST struct device *pcidev_path_on_bus(unsigned int bus, pci_devfn_t devfn); DEVTREE_CONST struct device *pcidev_on_root(uint8_t dev, uint8_t fn); DEVTREE_CONST struct bus *pci_root_bus(void); +/* Find PCI device with given D#:F# sitting behind the given PCI-to-PCI bridge device. */ +DEVTREE_CONST struct device *pcidev_path_behind_pci2pci_bridge( + const struct device *bridge, + pci_devfn_t devfn); /* To be deprecated, avoid using. * |