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From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Jesper Dangaard Brouer <brouer@redhat.com>
Cc: "Tariq Toukan" <tariqt@mellanox.com>,
	"Ilias Apalodimas" <ilias.apalodimas@linaro.org>,
	"Toke Høiland-Jørgensen" <toke@toke.dk>,
	"Robin Murphy" <robin.murphy@arm.com>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Tony Luck" <tony.luck@intel.com>,
	"Fenghua Yu" <fenghua.yu@intel.com>,
	"Marek Szyprowski" <m.szyprowski@samsung.com>,
	"Keith Busch" <keith.busch@intel.com>,
	"Jonathan Derrick" <jonathan.derrick@intel.com>,
	linux-pci@vger.kernel.org, linux-ia64@vger.kernel.org,
	x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 08/15] dma-mapping: move dma_get_required_mask to kernel/dma
Date: Fri,  7 Dec 2018 11:07:13 -0800
Message-ID: <20181207190720.18517-9-hch@lst.de> (raw)
In-Reply-To: <20181207190720.18517-1-hch@lst.de>

dma_get_required_mask should really be with the rest of the DMA mapping
implementation instead of in drivers/base as a lone outlier.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/base/platform.c | 31 -------------------------------
 kernel/dma/mapping.c    | 34 +++++++++++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 32 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 41b91af95afb..eae841935a45 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1179,37 +1179,6 @@ int __init platform_bus_init(void)
 	return error;
 }
 
-#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
-static u64 dma_default_get_required_mask(struct device *dev)
-{
-	u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
-	u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
-	u64 mask;
-
-	if (!high_totalram) {
-		/* convert to mask just covering totalram */
-		low_totalram = (1 << (fls(low_totalram) - 1));
-		low_totalram += low_totalram - 1;
-		mask = low_totalram;
-	} else {
-		high_totalram = (1 << (fls(high_totalram) - 1));
-		high_totalram += high_totalram - 1;
-		mask = (((u64)high_totalram) << 32) + 0xffffffff;
-	}
-	return mask;
-}
-
-u64 dma_get_required_mask(struct device *dev)
-{
-	const struct dma_map_ops *ops = get_dma_ops(dev);
-
-	if (ops->get_required_mask)
-		return ops->get_required_mask(dev);
-	return dma_default_get_required_mask(dev);
-}
-EXPORT_SYMBOL_GPL(dma_get_required_mask);
-#endif
-
 static __initdata LIST_HEAD(early_platform_driver_list);
 static __initdata LIST_HEAD(early_platform_device_list);
 
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index dfbc3deb95cd..dfe29d18dba1 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -5,7 +5,7 @@
  * Copyright (c) 2006  SUSE Linux Products GmbH
  * Copyright (c) 2006  Tejun Heo <teheo@suse.de>
  */
-
+#include <linux/memblock.h> /* for max_pfn */
 #include <linux/acpi.h>
 #include <linux/dma-noncoherent.h>
 #include <linux/export.h>
@@ -262,3 +262,35 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
 #endif /* !CONFIG_ARCH_NO_COHERENT_DMA_MMAP */
 }
 EXPORT_SYMBOL(dma_common_mmap);
+
+#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
+static u64 dma_default_get_required_mask(struct device *dev)
+{
+	u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
+	u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
+	u64 mask;
+
+	if (!high_totalram) {
+		/* convert to mask just covering totalram */
+		low_totalram = (1 << (fls(low_totalram) - 1));
+		low_totalram += low_totalram - 1;
+		mask = low_totalram;
+	} else {
+		high_totalram = (1 << (fls(high_totalram) - 1));
+		high_totalram += high_totalram - 1;
+		mask = (((u64)high_totalram) << 32) + 0xffffffff;
+	}
+	return mask;
+}
+
+u64 dma_get_required_mask(struct device *dev)
+{
+	const struct dma_map_ops *ops = get_dma_ops(dev);
+
+	if (ops->get_required_mask)
+		return ops->get_required_mask(dev);
+	return dma_default_get_required_mask(dev);
+}
+EXPORT_SYMBOL_GPL(dma_get_required_mask);
+#endif
+
-- 
2.19.1


  parent reply index

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-07 19:07 [RFC] avoid indirect calls for DMA direct mappings v2 Christoph Hellwig
2018-12-07 19:07 ` [PATCH 01/15] swiotlb: remove SWIOTLB_MAP_ERROR Christoph Hellwig
2018-12-07 19:07 ` [PATCH 02/15] swiotlb: remove dma_mark_clean Christoph Hellwig
2019-01-02 21:53   ` Tony Luck
2019-01-03  7:23     ` Christoph Hellwig
2019-01-03 17:35       ` Tony Luck
2019-01-04  8:09         ` Christoph Hellwig
2018-12-07 19:07 ` [PATCH 03/15] dma-direct: improve addressability error reporting Christoph Hellwig
2018-12-07 19:07 ` [PATCH 04/15] dma-direct: use dma_direct_map_page to implement dma_direct_map_sg Christoph Hellwig
2018-12-07 19:07 ` [PATCH 05/15] dma-direct: merge swiotlb_dma_ops into the dma_direct code Christoph Hellwig
2018-12-07 19:07 ` [PATCH 06/15] dma-mapping: simplify the dma_sync_single_range_for_{cpu,device} implementation Christoph Hellwig
2018-12-07 19:07 ` [PATCH 07/15] dma-mapping: merge dma_unmap_page_attrs and dma_unmap_single_attrs Christoph Hellwig
2018-12-07 19:07 ` Christoph Hellwig [this message]
2018-12-07 19:07 ` [PATCH 09/15] dma-mapping: move various slow path functions out of line Christoph Hellwig
2018-12-07 19:07 ` [PATCH 10/15] dma-mapping: move dma_cache_sync " Christoph Hellwig
2018-12-07 19:07 ` [PATCH 11/15] dma-mapping: always build the direct mapping code Christoph Hellwig
2018-12-07 19:07 ` [PATCH 12/15] dma-mapping: factor out dummy DMA ops Christoph Hellwig
2018-12-07 19:07 ` [PATCH 13/15] ACPI / scan: Refactor _CCA enforcement Christoph Hellwig
2018-12-14 21:15   ` Bjorn Helgaas
2018-12-07 19:07 ` [PATCH 14/15] vmd: use the proper dma_* APIs instead of direct methods calls Christoph Hellwig
2018-12-14 21:17   ` Bjorn Helgaas
2018-12-14 21:34     ` Derrick, Jonathan
2018-12-07 19:07 ` [PATCH 15/15] dma-mapping: bypass indirect calls for dma-direct Christoph Hellwig
2018-12-14 14:11   ` Marek Szyprowski
2018-12-14 14:24     ` Christoph Hellwig
2018-12-14 14:32       ` Marek Szyprowski
2018-12-15 17:46   ` [15/15] " Guenter Roeck
2018-12-16  9:02     ` Christoph Hellwig
2018-12-18 20:34   ` Guillaume Tucker
2018-12-18 20:42     ` Robin Murphy
2018-12-19  6:42       ` Christoph Hellwig
2018-12-20 16:44   ` [PATCH 15/15] " Thierry Reding
2018-12-20 16:46     ` Christoph Hellwig
2018-12-08 16:06 ` [RFC] avoid indirect calls for DMA direct mappings v2 Jesper Dangaard Brouer
2018-12-08 16:50   ` Christoph Hellwig
2018-12-10 21:51 ` Luck, Tony
2018-12-11  6:51   ` Christoph Hellwig
2018-12-11 16:42     ` Luck, Tony
2018-12-11 17:13     ` Luck, Tony
2018-12-11 17:15       ` Christoph Hellwig
2018-12-13 20:08 ` Christoph Hellwig

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