[PATCH 5/9 v2] pci/msi: interface to set an iova for a msi region
From: Bharat Bhushan <hidden>
Date: 2013-11-19 05:24:11
Also in:
linux-iommu, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
This patch defines an interface by which a msi page can be mapped to a specific iova page. This is a requirement in aperture type of IOMMUs (like Freescale PAMU), where we map msi iova page just after guest memory iova address. Signed-off-by: Bharat Bhushan <redacted> --- v2 - new patch drivers/pci/msi.c | 13 +++++++++++++ include/linux/pci.h | 8 ++++++++ 2 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 2643a29..040609f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c@@ -77,6 +77,19 @@ int __weak arch_msi_get_region(int region_num, struct msi_region *region) return 0; } +int __weak arch_msi_set_iova(struct pci_dev *pdev, int region_num, + dma_addr_t iova, bool set) +{ + return 0; +} + +int msi_set_iova(struct pci_dev *pdev, int region_num, + dma_addr_t iova, bool set) +{ + return arch_msi_set_iova(pdev, region_num, iova, set); +} +EXPORT_SYMBOL(msi_set_iova); + int msi_get_region_count(void) { return arch_msi_get_region_count();
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c587034..c6d3e58 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -1195,6 +1195,12 @@ static inline int msi_get_region(int region_num, struct msi_region *region) { return 0; } + +static inline int msi_set_iova(struct pci_dev *pdev, int region_num, + dma_addr_t iova, bool set) +{ + return 0; +} #else int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec); int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec);
@@ -1209,6 +1215,8 @@ void pci_restore_msi_state(struct pci_dev *dev); int pci_msi_enabled(void); int msi_get_region_count(void); 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 #ifdef CONFIG_PCIEPORTBUS
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1.7.0.4