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From: Tom Murphy <murphyt7@tcd.ie>
To: iommu@lists.linux-foundation.org
Cc: David Woodhouse <dwmw2@infradead.org>,
	linux-kernel@vger.kernel.org, Tom Murphy <murphyt7@tcd.ie>
Subject: [PATCH V2 2/5] iommu: Add iommu_dma_free_cpu_cached_iovas function
Date: Thu,  3 Sep 2020 21:18:34 +0100	[thread overview]
Message-ID: <20200903201839.7327-3-murphyt7@tcd.ie> (raw)
In-Reply-To: <20200903201839.7327-1-murphyt7@tcd.ie>

to dma-iommu ops

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>
---
 drivers/iommu/dma-iommu.c | 9 +++++++++
 include/linux/dma-iommu.h | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f69dc9467d71..33f3f4f5edc5 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..316d22a4a860 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;
-- 
2.20.1

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  parent reply	other threads:[~2020-09-03 20:28 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-03 20:18 [PATCH V2 0/5] Convert the intel iommu driver to the dma-iommu api Tom Murphy
2020-09-03 20:18 ` [PATCH V2 1/5] iommu: Handle freelists when using deferred flushing in iommu drivers Tom Murphy
2020-09-03 20:18 ` Tom Murphy [this message]
2020-09-09  0:45   ` [PATCH V2 2/5] iommu: Add iommu_dma_free_cpu_cached_iovas function Lu Baolu
2020-09-09  7:05     ` Christoph Hellwig
2020-09-12  2:55       ` Lu Baolu
2020-09-03 20:18 ` [PATCH V2 3/5] iommu: allow the dma-iommu api to use bounce buffers Tom Murphy
2020-09-09  1:34   ` Lu Baolu
2020-09-03 20:18 ` [PATCH V2 4/5] iommu/vt-d: Convert intel iommu driver to the iommu ops Tom Murphy
2020-09-09  1:59   ` Lu Baolu
2020-09-03 20:18 ` [PATCH V2 5/5] DO NOT MERGE: iommu: disable list appending in dma-iommu Tom Murphy
2020-09-07  7:00   ` Christoph Hellwig
2020-09-07 20:18     ` Tom Murphy
2020-09-08  5:36       ` Christoph Hellwig
2020-09-08  5:55         ` Christoph Hellwig
2020-09-08  6:04           ` Lu Baolu
2020-09-08  6:23             ` Christoph Hellwig
2020-09-08  9:07               ` Lu Baolu
2020-09-09  1:43               ` Lu Baolu
2020-09-09  7:06                 ` Christoph Hellwig
2020-09-12  3:13                   ` Lu Baolu
2020-09-04 10:03 ` [PATCH V2 0/5] Convert the intel iommu driver to the dma-iommu api Joerg Roedel

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