lkml.org 
[lkml]   [2021]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/3] PCI/gic-v3-its: Add support for same ITS device ID for multiple PCIe devices
Date
AM64 has an issue in that it doesn't trigger interrupt if the address
in the *pre_its_window* is not aligned to 8-bytes (this is due to an
invalid bridge configuration in HW).

This means there will not be interrupts for devices with PCIe
requestor ID 0x1, 0x3, 0x5..., as the address in the pre-ITS window
would be 4 (1 << 2), 12 (3 << 2), 20 (5 << 2) respectively which are
not aligned to 8-bytes.

The DT binding has specified "msi-map-mask" using which multiple PCIe
devices could be made to use the same ITS device ID.

Add support in irq-gic-v3-its-pci-msi.c for such cases where multiple
PCIe devices are using the same ITS device ID.

Kishon Vijay Abraham I (3):
PCI: Add support in pci_walk_bus() to invoke callback matching RID
PCI: Export find_pci_root_bus()
irqchip/gic-v3-its: Include "msi-map-mask" for calculating nvecs

drivers/irqchip/irq-gic-v3-its-pci-msi.c | 21 ++++++++++++++++++++-
drivers/pci/bus.c | 13 +++++++++----
drivers/pci/host-bridge.c | 3 ++-
include/linux/pci.h | 8 ++++++--
4 files changed, 37 insertions(+), 8 deletions(-)

--
2.17.1

\
 
 \ /
  Last update: 2021-09-20 08:42    [W:0.131 / U:0.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site