From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from co1outboundpool.messaging.microsoft.com (co1ehsobe002.messaging.microsoft.com [216.32.180.185]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "MSIT Machine Auth CA 2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 6BAE92C0493 for ; Tue, 19 Nov 2013 16:23:55 +1100 (EST) From: Bharat Bhushan To: , , , , , , , , , Subject: [PATCH 5/9 v2] pci/msi: interface to set an iova for a msi region Date: Tue, 19 Nov 2013 10:47:09 +0530 Message-ID: <1384838233-24847-6-git-send-email-Bharat.Bhushan@freescale.com> In-Reply-To: <1384838233-24847-1-git-send-email-Bharat.Bhushan@freescale.com> References: <1384838233-24847-1-git-send-email-Bharat.Bhushan@freescale.com> MIME-Version: 1.0 Content-Type: text/plain Cc: Bharat Bhushan List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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 -- 1.7.0.4