linux-kernel - [PATCH 6/9 v2] powerpc: pci: Extend msi iova page setup to arch specific

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Message-ID: <1384838233-24847-7-git-send-email-Bharat.Bhushan@freescale.com>
Date:	Tue, 19 Nov 2013 10:47:10 +0530
From:	Bharat Bhushan <r65777@...escale.com>
To:	<alex.williamson@...hat.com>, <joro@...tes.org>,
	<bhelgaas@...gle.com>, <agraf@...e.de>, <scottwood@...escale.com>,
	<stuart.yoder@...escale.com>, <iommu@...ts.linux-foundation.org>,
	<linux-pci@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>
CC:	Bharat Bhushan <Bharat.Bhushan@...escale.com>,
	Bharat Bhushan <bharat.bhushan@...escale.com>
Subject: [PATCH 6/9 v2] powerpc: pci: Extend msi iova page setup to arch specific

This patch extend the interface to arch specific code for setting
msi iova address for a msi page. Machine specific code is not yet
implemented.

Signed-off-by: Bharat Bhushan <bharat.bhushan@...escale.com>
---
v2
 - new patch

 arch/powerpc/include/asm/machdep.h |    2 ++
 arch/powerpc/kernel/msi.c          |   10 ++++++++++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 8d1b787..e87b806 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -132,6 +132,8 @@ struct machdep_calls {
 	/* Returns the requested region's address and size */
 	int		(*msi_get_region)(int region_num,
 					  struct msi_region *region);
+	int		(*msi_set_iova)(struct pci_dev *pdev, int region_num,
+					dma_addr_t iova, bool set);
 #endif
 
 	void		(*restart)(char *cmd);
diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index 1a67787..e2bd555 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -13,6 +13,16 @@
 
 #include <asm/machdep.h>
 
+int arch_msi_set_iova(struct pci_dev *pdev, int region_num,
+		      dma_addr_t iova, bool set)
+{
+	if (ppc_md.msi_set_iova) {
+		pr_debug("msi: Using platform get_region_count routine.\n");
+		return ppc_md.msi_set_iova(pdev, region_num, iova, set);
+	}
+	return 0;
+}
+
 int arch_msi_get_region_count(void)
 {
 	if (ppc_md.msi_get_region_count) {
-- 
1.7.0.4


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