linux-kernel - [RFC PATCH 22/30] PCI: cadence: Configure pci_epc_features to align BAR addresses to 256 Bytes

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Message-ID: <20190604131516.13596-23-kishon@ti.com>
Date:   Tue, 4 Jun 2019 18:45:08 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Tom Joseph <tjoseph@...ence.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Frank Rowand <frowand.list@...il.com>,
        Jingoo Han <jingoohan1@...il.com>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-omap@...r.kernel.org>, <linux-rockchip@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: [RFC PATCH 22/30] PCI: cadence: Configure pci_epc_features to align BAR addresses to 256 Bytes

Cadence PCIe controller has BITS[7:0] of the Inbound Address
Translation Units AXI address reserved for special purpose. In order to
accommodate this constraint, BAR addresses should be aligned to 256 Byte
addresses. Configure pci_epc_features to align BAR addresses to 256
Bytes here.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/pci/controller/pcie-cadence-ep.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/pcie-cadence-ep.c b/drivers/pci/controller/pcie-cadence-ep.c
index 3dc1a896c1e6..25638af7c668 100644
--- a/drivers/pci/controller/pcie-cadence-ep.c
+++ b/drivers/pci/controller/pcie-cadence-ep.c
@@ -484,6 +484,7 @@ static const struct pci_epc_features cdns_pcie_epc_features = {
 	.linkup_notifier = false,
 	.msi_capable = true,
 	.msix_capable = false,
+	.align = 256,
 };
 
 static const struct pci_epc_features cdns_pcie_epc_vf_features = {
-- 
2.17.1