linux-kernel - [PATCH v3 2/2] pci: xgene: Fix driver to handle multiple memory ranges

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Message-Id: <844cb76fe55ce4ce45411281500bdb93e0d6932a.1436476100.git.dhdang@apm.com>
Date:	Thu,  9 Jul 2015 14:20:12 -0700
From:	Duc Dang <dhdang@....com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>, Arnd Bergmann <arnd@...db.de>,
	Catalin Marinas <catalin.marinas@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Will Deacon <will.deacon@....com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Tanmay Inamdar <tinamdar@....com>, patches@....com,
	Duc Dang <dhdang@....com>
Subject: [PATCH v3 2/2] pci: xgene: Fix driver to handle multiple memory ranges

X-Gene PCIe controller has registers to support multiple memory ranges.
This patch implement addtional register configuration required for the
driver to support 1 additional huge 64-bit prefetch memory window.

Signed-off-by: Duc Dang <dhdang@....com>
Signed-off-by: Tanmay Inamdar <tinamdar@....com>
---
 drivers/pci/host/pci-xgene.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index a9dfb70..55fe865 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -321,8 +321,16 @@ static int xgene_pcie_map_ranges(struct xgene_pcie_port *port,
 				return ret;
 			break;
 		case IORESOURCE_MEM:
-			xgene_pcie_setup_ob_reg(port, res, OMR1BARL, res->start,
-						res->start - window->offset);
+			if (res->flags & IORESOURCE_PREFETCH)
+				xgene_pcie_setup_ob_reg(port, res, OMR2BARL,
+							res->start,
+							res->start -
+							window->offset);
+			else
+				xgene_pcie_setup_ob_reg(port, res, OMR1BARL,
+							res->start,
+							res->start -
+							window->offset);
 			break;
 		case IORESOURCE_BUS:
 			break;
-- 
1.9.1

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