lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 25 Oct 2023 18:30:28 +0530
From:   Manivannan Sadhasivam <>
        Manivannan Sadhasivam <>
Subject: [PATCH v2 0/1] PCI: qcom-ep: Fix the BAR size programming


This series fixes the issue seen on Qcom EP platforms implementing the DWC
core while setting the BAR size. Currently, whatever the BAR size getting
programmed through pci_epc_set_bar() on the EP side is not reflected on the
host side during enumeration.

Debugging that issue revealed that the DWC Spec mandates asserting the DBI
CS2 register in addition to DBI CS while programming some read only and
shadow registers. So on the Qcom EP platforms, the driver needs to assert
DBI_CS2 in ELBI region before writing DBI2 registers and deassert it once

This is done by implementing the write_dbi2() callback exposed by the DWC
core driver in the Qcom PCIe EP driver.

This series has been tested on Qcom SM8450 based development platform.

- Mani

Changes in v2:

- Switch to write_dbi2() callback as suggested by Sergey

Manivannan Sadhasivam (1):
  PCI: qcom-ep: Implement write_dbi2() callback for writing DBI2
    registers properly

 drivers/pci/controller/dwc/pcie-qcom-ep.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)


Powered by blists - more mailing lists