From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: ulf.hansson@linaro.org, wsa+renesas@sang-engineering.com,
hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com,
joro@8bytes.org
Cc: linux-renesas-soc@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-mmc@vger.kernel.org
Subject: [RFC PATCH v5 1/8] dma-mapping: add a device driver helper for iova contiguous
Date: Wed, 5 Jun 2019 20:11:47 +0900 [thread overview]
Message-ID: <1559733114-4221-2-git-send-email-yoshihiro.shimoda.uh@renesas.com> (raw)
In-Reply-To: <1559733114-4221-1-git-send-email-yoshihiro.shimoda.uh@renesas.com>
This API can set a flag whether a device requires iova contiguous
strictly.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
include/linux/device.h | 1 +
include/linux/dma-mapping.h | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/linux/device.h b/include/linux/device.h
index e85264f..a33d611 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -752,6 +752,7 @@ struct device_dma_parameters {
*/
unsigned int max_segment_size;
unsigned long segment_boundary_mask;
+ bool iova_contiguous;
};
/**
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 6309a72..cdb4e75 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -729,6 +729,22 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
return -EIO;
}
+static inline int dma_get_iova_contiguous(struct device *dev)
+{
+ if (dev->dma_parms)
+ return dev->dma_parms->iova_contiguous;
+ return false;
+}
+
+static inline int dma_set_iova_contiguous(struct device *dev, bool contiguous)
+{
+ if (dev->dma_parms) {
+ dev->dma_parms->iova_contiguous = contiguous;
+ return 0;
+ }
+ return -EIO;
+}
+
#ifndef dma_max_pfn
static inline unsigned long dma_max_pfn(struct device *dev)
{
--
2.7.4
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next prev parent reply other threads:[~2019-06-05 11:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-05 11:11 [RFC PATCH v5 0/8] treewide: improve R-Car SDHI performance Yoshihiro Shimoda
2019-06-05 11:11 ` Yoshihiro Shimoda [this message]
2019-06-05 11:11 ` [RFC PATCH v5 2/8] iommu/dma: move iommu_dma_unmap_sg() place Yoshihiro Shimoda
2019-06-05 11:11 ` [RFC PATCH v5 3/8] iommu: add a new capable IOMMU_CAP_MERGING Yoshihiro Shimoda
2019-06-05 12:21 ` Robin Murphy
2019-06-05 12:38 ` Christoph Hellwig
2019-06-06 6:28 ` Yoshihiro Shimoda
2019-06-06 7:00 ` Christoph Hellwig
2019-06-07 5:41 ` Yoshihiro Shimoda
2019-06-07 5:49 ` Christoph Hellwig
2019-06-07 6:01 ` Yoshihiro Shimoda
2019-06-06 5:53 ` Yoshihiro Shimoda
2019-06-05 16:17 ` Sergei Shtylyov
2019-06-05 11:11 ` [RFC PATCH v5 4/8] iommu/ipmmu-vmsa: add capable ops Yoshihiro Shimoda
2019-06-05 11:11 ` [RFC PATCH v5 5/8] mmc: tmio: No memory size limitation if runs on IOMMU Yoshihiro Shimoda
2019-06-05 11:11 ` [RFC PATCH v5 6/8] mmc: tmio: Add a definition for default max_segs Yoshihiro Shimoda
2019-06-05 11:11 ` [RFC PATCH v5 7/8] mmc: renesas_sdhi: sort headers Yoshihiro Shimoda
2019-06-05 11:11 ` [RFC PATCH v5 8/8] mmc: renesas_sdhi: use multiple segments if possible Yoshihiro Shimoda
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