linux-kernel - [PATCH v2 0/3] PCIe: Endpoint: Redesign MSI-X support

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Message-ID: <20200225081703.8857-1-kishon@ti.com>
Date:   Tue, 25 Feb 2020 13:47:00 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Murali Karicheri <m-karicheri2@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Kishon Vijay Abraham I <kishon@...com>
CC:     <linux-pci@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Xiaowei Bao <xiaowei.bao@....com>
Subject: [PATCH v2 0/3] PCIe: Endpoint: Redesign MSI-X support

Existing MSI-X support in Endpoint core has limitations:
 1) MSIX table (which is mapped to a BAR) is not allocated by
    anyone. Ideally this should be allocated by endpoint
    function driver.
 2) Endpoint controller can choose any random BARs for MSIX
    table (irrespective of whether the endpoint function driver
    has allocated memory for it or not)

In order to avoid these limitations, pci_epc_set_msix() is
modified to include BAR Indicator register (BIR) configuration
and MSIX table offset as arguments. This series also fixed MSIX
support in dwc driver and add MSI-X support in Cadence PCIe driver.

Changes from v1:
*) Removed Cadence MSI-X support from the series
*) Fixed nits pointed out by Bjorn

Kishon Vijay Abraham I (3):
  PCI: endpoint: Fix ->set_msix() to take BIR and offset as arguments
  PCI: dwc: Fix dw_pcie_ep_raise_msix_irq() to get correct MSI-X table
    address
  PCI: keystone: Allow AM654 PCIe Endpoint to raise MSI-X interrupt

 drivers/pci/controller/dwc/pci-keystone.c     |  5 +-
 .../pci/controller/dwc/pcie-designware-ep.c   | 61 +++++++++----------
 drivers/pci/controller/dwc/pcie-designware.h  |  1 +
 drivers/pci/endpoint/functions/pci-epf-test.c | 31 ++++++++--
 drivers/pci/endpoint/pci-epc-core.c           |  7 ++-
 drivers/pci/endpoint/pci-epf-core.c           |  2 +
 include/linux/pci-epc.h                       |  6 +-
 include/linux/pci-epf.h                       | 15 +++++
 8 files changed, 86 insertions(+), 42 deletions(-)

-- 
2.17.1