mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 00:35:19 +07:00
184cd4a3b9
This adds support for p7IOC (and possibly other IODA v1 IO Hubs) using OPAL v2 interfaces. We completely take over resource assignment and assign them using an algorithm that hands out device BARs in a way that makes them fit in individual segments of the M32 window of the bridge, which enables us to assign individual PEs to devices and functions. The current implementation gives out a PE per functions on PCIe, and a PE for the entire bridge for PCIe to PCI-X bridges. This can be adjusted / fine tuned later. We also setup DMA resources (32-bit only for now) and MSIs (both 32-bit and 64-bit MSI are supported). The DMA allocation tries to divide the available 256M segments of the 32-bit DMA address space "fairly" among PEs. This is done using a "weight" heuristic which assigns less value to things like OHCI USB controllers than, for example SCSI RAID controllers. This algorithm will probably want some fine tuning for specific devices or device types. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| opal-nvram.c | ||
| opal-rtc.c | ||
| opal-takeover.S | ||
| opal-wrappers.S | ||
| opal.c | ||
| pci-ioda.c | ||
| pci-p5ioc2.c | ||
| pci.c | ||
| pci.h | ||
| powernv.h | ||
| setup.c | ||
| smp.c | ||