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From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Tom Murphy <murphyt7@tcd.ie>,
	David Woodhouse <dwmw2@infradead.org>,
	Christoph Hellwig <hch@infradead.org>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	Intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org
Subject: [PATCH v3 2/6] iommu: Add iommu_dma_free_cpu_cached_iovas()
Date: Sat, 12 Sep 2020 11:21:56 +0800	[thread overview]
Message-ID: <20200912032200.11489-3-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200912032200.11489-1-baolu.lu@linux.intel.com>

From: Tom Murphy <murphyt7@tcd.ie>

Add a iommu_dma_free_cpu_cached_iovas function to allow drivers which
use the dma-iommu ops to free cached cpu iovas.

Signed-off-by: Tom Murphy <murphyt7@tcd.ie>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/dma-iommu.c | 9 +++++++++
 include/linux/dma-iommu.h | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 82c071b2d5c8..d06411bd5e08 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -50,6 +50,15 @@ struct iommu_dma_cookie {
 	struct iommu_domain		*fq_domain;
 };
 
+void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
+		struct iommu_domain *domain)
+{
+	struct iommu_dma_cookie *cookie = domain->iova_cookie;
+	struct iova_domain *iovad = &cookie->iovad;
+
+	free_cpu_cached_iovas(cpu, iovad);
+}
+
 static void iommu_dma_entry_dtor(unsigned long data)
 {
 	struct page *freelist = (struct page *)data;
diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h
index 2112f21f73d8..706b68d1359b 100644
--- a/include/linux/dma-iommu.h
+++ b/include/linux/dma-iommu.h
@@ -37,6 +37,9 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc,
 
 void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
 
+void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
+		struct iommu_domain *domain);
+
 #else /* CONFIG_IOMMU_DMA */
 
 struct iommu_domain;
@@ -78,5 +81,10 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
 {
 }
 
+static inline void iommu_dma_free_cpu_cached_iovas(unsigned int cpu,
+		struct iommu_domain *domain)
+{
+}
+
 #endif	/* CONFIG_IOMMU_DMA */
 #endif	/* __DMA_IOMMU_H */
-- 
2.17.1

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  parent reply	other threads:[~2020-09-12  3:28 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-12  3:21 [PATCH v3 0/6] Convert the intel iommu driver to the dma-iommu api Lu Baolu
2020-09-12  3:21 ` [PATCH v3 1/6] iommu: Handle freelists when using deferred flushing in iommu drivers Lu Baolu
2020-09-12  3:21 ` Lu Baolu [this message]
2020-09-12  3:21 ` [PATCH v3 3/6] iommu: Allow the dma-iommu api to use bounce buffers Lu Baolu
2020-09-12  3:21 ` [PATCH v3 4/6] iommu: Add quirk for Intel graphic devices in map_sg Lu Baolu
2020-09-12  3:21 ` [PATCH v3 5/6] iommu/vt-d: Convert intel iommu driver to the iommu ops Lu Baolu
2020-09-12  3:22 ` [PATCH v3 6/6] iommu/vt-d: Cleanup after converting to dma-iommu ops Lu Baolu
2020-09-14  8:04 ` [PATCH v3 0/6] Convert the intel iommu driver to the dma-iommu api Tvrtko Ursulin
2020-09-15  1:47   ` Lu Baolu
2020-09-15  8:31     ` Tvrtko Ursulin
2020-09-22 11:05       ` Robin Murphy
2020-09-23  5:38         ` Lu Baolu
2020-09-24  2:35       ` Lu Baolu
2020-09-18 20:47 ` [Intel-gfx] " Logan Gunthorpe
2020-09-20  6:36   ` Lu Baolu
2020-09-21 15:48     ` Logan Gunthorpe
2020-09-22  0:24       ` Lu Baolu
2020-09-22 15:38         ` Logan Gunthorpe
2020-09-22  9:51   ` Robin Murphy
2020-09-22 18:45     ` Logan Gunthorpe

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