| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #ifndef SOC_INTEL_COMMON_BLOCK_PCIE_RP_H |
| #define SOC_INTEL_COMMON_BLOCK_PCIE_RP_H |
| |
| #include <stdint.h> |
| |
| /* |
| * The PCIe Root Ports usually come in groups of up to 8 PCI-device |
| * functions. |
| * |
| * `slot` is the PCI device/slot number of such a group. |
| * `count` is the number of functions within the group. It is assumed that |
| * the first group includes the RPs 1 to the first group's `count` and that |
| * adjacent groups follow without gaps in the numbering. |
| */ |
| struct pcie_rp_group { |
| unsigned int slot; |
| unsigned int count; |
| }; |
| |
| /* |
| * Update PCI paths of the root ports in the devicetree. |
| * |
| * Depending on the board layout and physical presence of downstream |
| * devices, individual root-port functions can be hidden and reordered. |
| * If we have device nodes for root ports in the static `devicetree.cb`, |
| * we need to update their PCI paths, so the nodes still control the |
| * correct root port. Device nodes for disabled root ports will be |
| * unlinked from the bus, to not interfere with PCI enumeration. |
| * |
| * Call this once, after root ports have been reordered, but before PCI |
| * enumeration. |
| * |
| * `groups` points to a list of groups terminated by an entry with `count == 0`. |
| */ |
| void pcie_rp_update_devicetree(const struct pcie_rp_group *groups); |
| |
| #endif /* SOC_INTEL_COMMON_BLOCK_PCIE_RP_H */ |