linux-kernel - [PATCH 0/4] Redesign MSI-X support in PCIe Endpoint Core

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Date:   Wed, 11 Dec 2019 18:16:04 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
CC:     Murali Karicheri <m-karicheri2@...com>,
        Jingoo Han <jingoohan1@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Xiaowei Bao <xiaowei.bao@....com>
Subject: [PATCH 0/4] Redesign MSI-X support in PCIe Endpoint Core

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.

The previous version of Cadence EP MSI-X support is @ [1].
This series is created on top of [2]

[1] -> https://patchwork.ozlabs.org/patch/971160/
[2] -> http://lore.kernel.org/r/20191209092147.22901-1-kishon@ti.com

Alan Douglas (1):
  PCI: cadence: Add MSI-X support to Endpoint driver

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 MSIX table
    address
  PCI: keystone: Add AM654 PCIe Endpoint to raise MSIX interrupt

 .../pci/controller/cadence/pcie-cadence-ep.c  | 112 +++++++++++++++++-
 drivers/pci/controller/cadence/pcie-cadence.h |  10 ++
 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 +++
 10 files changed, 207 insertions(+), 43 deletions(-)

-- 
2.17.1