diff options
| author | Abhishek Shah <abhishek.shah@broadcom.com> | 2019-09-06 06:58:13 +0300 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-10-25 12:18:00 +0300 |
| commit | 9415743e4c8a029bfa46654e3a0a681a8db473f8 (patch) | |
| tree | 402208cffee2efe343dcdb5ae50b60d70dcd78bf /drivers/pci/pci-bridge-emul.c | |
| parent | 54ecb8f7028c5eb3d740bb82b0f1d90f2df63c5c (diff) | |
| download | linux-9415743e4c8a029bfa46654e3a0a681a8db473f8.tar.xz | |
PCI: iproc: Invalidate PAXB address mapping before programming it
Invalidate PAXB inbound/outbound address mapping on probe before
programming it.
Kernel relies on outbound/inbound windows VALID bit in OARR registers to
detect if a window was programmed and if it is set it does not overwrite
it.
This causes issues on soft reboot (eg kexec) since the host controller
does not go through a HW reset on softboot so the kernel detects valid
outbound/inbound windows configuration and is not able to reprogramme
it as expected.
Therefore, in order to make sure outbound/inbound windows are
reprogrammed on soft reboot (eg kexec), invalidate memory windows on
each probe to fix the issue.
Signed-off-by: Abhishek Shah <abhishek.shah@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Diffstat (limited to 'drivers/pci/pci-bridge-emul.c')
0 files changed, 0 insertions, 0 deletions