From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 03/20] iommu/amd: Allocate iova_domain for dma_ops_domain Date: Fri, 8 Jul 2016 13:44:54 +0200 Message-ID: <1467978311-28322-4-git-send-email-joro@8bytes.org> References: <1467978311-28322-1-git-send-email-joro@8bytes.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1467978311-28322-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@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: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: Vincent.Wan-5C7GfCeVMHo@public.gmane.org, Joerg Roedel , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org From: Joerg Roedel Use it later for allocating the IO virtual addresses. Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 634f636..71af367 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -38,6 +38,7 @@ #include #include #include +#include #include #include #include @@ -56,6 +57,11 @@ #define LOOP_TIMEOUT 100000 +/* IO virtual address start page frame number */ +#define IOVA_START_PFN (1) +#define IOVA_PFN(addr) ((addr) >> PAGE_SHIFT) +#define DMA_32BIT_PFN IOVA_PFN(DMA_BIT_MASK(32)) + /* * This bitmap is used to advertise the page sizes our hardware support * to the IOMMU core, which will then use this information to split @@ -157,6 +163,9 @@ struct dma_ops_domain { /* address space relevant data */ struct aperture_range *aperture[APERTURE_MAX_RANGES]; + + /* IOVA RB-Tree */ + struct iova_domain iovad; }; /**************************************************************************** @@ -1966,6 +1975,8 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom) if (!dom) return; + put_iova_domain(&dom->iovad); + free_percpu(dom->next_index); del_domain_from_list(&dom->domain); @@ -2041,6 +2052,9 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void) for_each_possible_cpu(cpu) *per_cpu_ptr(dma_dom->next_index, cpu) = 0; + init_iova_domain(&dma_dom->iovad, PAGE_SIZE, + IOVA_START_PFN, DMA_32BIT_PFN); + return dma_dom; free_dma_dom: @@ -2948,7 +2962,11 @@ static struct dma_map_ops amd_iommu_dma_ops = { int __init amd_iommu_init_api(void) { - int err = 0; + int ret, err = 0; + + ret = iova_cache_get(); + if (ret) + return ret; err = bus_set_iommu(&pci_bus_type, &amd_iommu_ops); if (err) -- 1.9.1