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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-mmc@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-renesas-soc@vger.kernel.org,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
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


  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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