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: Ashok Raj <ashok.raj@intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Intel-gfx@lists.freedesktop.org,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v4 2/7] iommu: Add iommu_dma_free_cpu_cached_iovas()
Date: Sun, 27 Sep 2020 14:34:32 +0800 [thread overview]
Message-ID: <20200927063437.13988-3-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20200927063437.13988-1-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 1b8ef3a2cbc3..fb84cfa83703 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
next prev parent reply other threads:[~2020-09-27 7:09 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-27 6:34 [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu api Lu Baolu
2020-09-27 6:34 ` [PATCH v4 1/7] iommu: Handle freelists when using deferred flushing in iommu drivers Lu Baolu
2020-09-27 6:34 ` Lu Baolu [this message]
2020-09-27 6:34 ` [PATCH v4 3/7] iommu: Allow the dma-iommu api to use bounce buffers Lu Baolu
2020-09-27 6:34 ` [PATCH v4 4/7] iommu: Add quirk for Intel graphic devices in map_sg Lu Baolu
2020-11-03 12:00 ` Robin Murphy
2020-09-27 6:34 ` [PATCH v4 5/7] iommu/vt-d: Update domain geometry in iommu_ops.at(de)tach_dev Lu Baolu
2020-09-27 6:34 ` [PATCH v4 6/7] iommu/vt-d: Convert intel iommu driver to the iommu ops Lu Baolu
2020-09-28 9:44 ` [PATCH v4 0/7] Convert the intel iommu driver to the dma-iommu api Tvrtko Ursulin
2020-09-29 0:11 ` Lu Baolu
2020-10-01 12:17 ` Joerg Roedel
2020-10-02 11:59 ` Lu Baolu
2020-10-12 8:44 ` Tvrtko Ursulin
2020-10-13 0:32 ` Lu Baolu
2020-11-02 2:00 ` Lu Baolu
2020-11-02 11:52 ` Tvrtko Ursulin
2020-11-03 2:53 ` Lu Baolu
2020-11-03 9:14 ` Tvrtko Ursulin
2020-11-03 9:58 ` Joonas Lahtinen
2020-11-03 10:54 ` Joerg Roedel
2020-11-20 10:20 ` Lu Baolu
2020-10-01 21:17 ` Logan Gunthorpe
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