From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752461AbaGKGRf (ORCPT ); Fri, 11 Jul 2014 02:17:35 -0400 Received: from mga11.intel.com ([192.55.52.93]:55697 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752374AbaGKGRc (ORCPT ); Fri, 11 Jul 2014 02:17:32 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,642,1400050800"; d="scan'208";a="560333253" From: Jiang Liu To: Joerg Roedel , David Woodhouse , Yinghai Lu , Bjorn Helgaas , Dan Williams , Vinod Koul , "Rafael J . Wysocki" Cc: Jiang Liu , Ashok Raj , Yijing Wang , Tony Luck , iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org, linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Subject: [Patch Part3 V4 11/21] iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify code Date: Fri, 11 Jul 2014 14:19:35 +0800 Message-Id: <1405059585-10620-12-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1405059585-10620-1-git-send-email-jiang.liu@linux.intel.com> References: <1405059585-10620-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce helper function domain_pfn_within_range() to simplify code and improve readability. Signed-off-by: Jiang Liu --- drivers/iommu/intel-iommu.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 0852b7021e4a..c9e65edaa2ad 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -549,6 +549,14 @@ static inline int domain_type_is_vm_or_si(struct dmar_domain *domain) DOMAIN_FLAG_STATIC_IDENTITY); } +static inline int domain_pfn_supported(struct dmar_domain *domain, + unsigned long pfn) +{ + int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; + + return !(addr_width < BITS_PER_LONG && pfn >> addr_width); +} + static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) { unsigned long sagaw; @@ -822,14 +830,13 @@ out: static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, unsigned long pfn, int *target_level) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct dma_pte *parent, *pte = NULL; int level = agaw_to_level(domain->agaw); int offset; BUG_ON(!domain->pgd); - if (addr_width < BITS_PER_LONG && pfn >> addr_width) + if (!domain_pfn_supported(domain, pfn)) /* Address beyond IOMMU's addressing capabilities. */ return NULL; @@ -912,12 +919,11 @@ static void dma_pte_clear_range(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned int large_page = 1; struct dma_pte *first_pte, *pte; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -978,10 +984,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; - - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); dma_pte_clear_range(domain, start_pfn, last_pfn); @@ -1083,11 +1087,10 @@ struct page *domain_unmap(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct page *freelist = NULL; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -1974,12 +1977,11 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, { struct dma_pte *first_pte = NULL, *pte = NULL; phys_addr_t uninitialized_var(pteval); - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned long sg_res; unsigned int largepage_lvl = 0; unsigned long lvl_pages = 0; - BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); + BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1)); if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) return -EINVAL; -- 1.7.10.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiang Liu Subject: [Patch Part3 V4 11/21] iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify code Date: Fri, 11 Jul 2014 14:19:35 +0800 Message-ID: <1405059585-10620-12-git-send-email-jiang.liu@linux.intel.com> References: <1405059585-10620-1-git-send-email-jiang.liu@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1405059585-10620-1-git-send-email-jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel , David Woodhouse , Yinghai Lu , Bjorn Helgaas , Dan Williams , Vinod Koul , "Rafael J . Wysocki" Cc: Tony Luck , linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-hotplug-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Jiang Liu List-Id: iommu@lists.linux-foundation.org Introduce helper function domain_pfn_within_range() to simplify code and improve readability. Signed-off-by: Jiang Liu --- drivers/iommu/intel-iommu.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 0852b7021e4a..c9e65edaa2ad 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -549,6 +549,14 @@ static inline int domain_type_is_vm_or_si(struct dmar_domain *domain) DOMAIN_FLAG_STATIC_IDENTITY); } +static inline int domain_pfn_supported(struct dmar_domain *domain, + unsigned long pfn) +{ + int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; + + return !(addr_width < BITS_PER_LONG && pfn >> addr_width); +} + static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) { unsigned long sagaw; @@ -822,14 +830,13 @@ out: static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, unsigned long pfn, int *target_level) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct dma_pte *parent, *pte = NULL; int level = agaw_to_level(domain->agaw); int offset; BUG_ON(!domain->pgd); - if (addr_width < BITS_PER_LONG && pfn >> addr_width) + if (!domain_pfn_supported(domain, pfn)) /* Address beyond IOMMU's addressing capabilities. */ return NULL; @@ -912,12 +919,11 @@ static void dma_pte_clear_range(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned int large_page = 1; struct dma_pte *first_pte, *pte; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -978,10 +984,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; - - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); dma_pte_clear_range(domain, start_pfn, last_pfn); @@ -1083,11 +1087,10 @@ struct page *domain_unmap(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct page *freelist = NULL; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -1974,12 +1977,11 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, { struct dma_pte *first_pte = NULL, *pte = NULL; phys_addr_t uninitialized_var(pteval); - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned long sg_res; unsigned int largepage_lvl = 0; unsigned long lvl_pages = 0; - BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); + BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1)); if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0) return -EINVAL; -- 1.7.10.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiang Liu Date: Fri, 11 Jul 2014 06:19:35 +0000 Subject: [Patch Part3 V4 11/21] iommu/vt-d: Introduce helper domain_pfn_within_range() to simplify code Message-Id: <1405059585-10620-12-git-send-email-jiang.liu@linux.intel.com> List-Id: References: <1405059585-10620-1-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1405059585-10620-1-git-send-email-jiang.liu@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Joerg Roedel , David Woodhouse , Yinghai Lu , Bjorn Helgaas , Dan Williams , Vinod Koul , "Rafael J . Wysocki" Cc: Jiang Liu , Ashok Raj , Yijing Wang , Tony Luck , iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org, linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Introduce helper function domain_pfn_within_range() to simplify code and improve readability. Signed-off-by: Jiang Liu --- drivers/iommu/intel-iommu.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 0852b7021e4a..c9e65edaa2ad 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -549,6 +549,14 @@ static inline int domain_type_is_vm_or_si(struct dmar_domain *domain) DOMAIN_FLAG_STATIC_IDENTITY); } +static inline int domain_pfn_supported(struct dmar_domain *domain, + unsigned long pfn) +{ + int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; + + return !(addr_width < BITS_PER_LONG && pfn >> addr_width); +} + static int __iommu_calculate_agaw(struct intel_iommu *iommu, int max_gaw) { unsigned long sagaw; @@ -822,14 +830,13 @@ out: static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain, unsigned long pfn, int *target_level) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct dma_pte *parent, *pte = NULL; int level = agaw_to_level(domain->agaw); int offset; BUG_ON(!domain->pgd); - if (addr_width < BITS_PER_LONG && pfn >> addr_width) + if (!domain_pfn_supported(domain, pfn)) /* Address beyond IOMMU's addressing capabilities. */ return NULL; @@ -912,12 +919,11 @@ static void dma_pte_clear_range(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned int large_page = 1; struct dma_pte *first_pte, *pte; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -978,10 +984,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; - - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); dma_pte_clear_range(domain, start_pfn, last_pfn); @@ -1083,11 +1087,10 @@ struct page *domain_unmap(struct dmar_domain *domain, unsigned long start_pfn, unsigned long last_pfn) { - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; struct page *freelist = NULL; - BUG_ON(addr_width < BITS_PER_LONG && start_pfn >> addr_width); - BUG_ON(addr_width < BITS_PER_LONG && last_pfn >> addr_width); + BUG_ON(!domain_pfn_supported(domain, start_pfn)); + BUG_ON(!domain_pfn_supported(domain, last_pfn)); BUG_ON(start_pfn > last_pfn); /* we don't need lock here; nobody else touches the iova range */ @@ -1974,12 +1977,11 @@ static int __domain_mapping(struct dmar_domain *domain, unsigned long iov_pfn, { struct dma_pte *first_pte = NULL, *pte = NULL; phys_addr_t uninitialized_var(pteval); - int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT; unsigned long sg_res; unsigned int largepage_lvl = 0; unsigned long lvl_pages = 0; - BUG_ON(addr_width < BITS_PER_LONG && (iov_pfn + nr_pages - 1) >> addr_width); + BUG_ON(!domain_pfn_supported(domain, iov_pfn + nr_pages - 1)); if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) = 0) return -EINVAL; -- 1.7.10.4