From: Christoph Hellwig <hch@lst.de>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Joonyoung Shim <jy0922.shim@samsung.com>,
Seung-Woo Kim <sw0312.kim@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Ben Skeggs <bskeggs@redhat.com>, Pawel Osciak <pawel@osciak.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Matt Porter <mporter@kernel.crashing.org>,
iommu@lists.linux-foundation.org
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
alsa-devel@alsa-project.org, linux-samsung-soc@vger.kernel.org,
linux-ia64@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-parisc@vger.kernel.org, linux-doc@vger.kernel.org,
nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-mips@vger.kernel.org,
linux-mm@kvack.org, netdev@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: [PATCH 16/28] dma-direct: rename and cleanup __phys_to_dma
Date: Wed, 19 Aug 2020 08:55:43 +0200 [thread overview]
Message-ID: <20200819065555.1802761-17-hch@lst.de> (raw)
In-Reply-To: <20200819065555.1802761-1-hch@lst.de>
The __phys_to_dma vs phys_to_dma distinction isn't exactly obvious. Try
to improve the situation by renaming __phys_to_dma to
phys_to_dma_unencryped, and not forcing architectures that want to
override phys_to_dma to actually provide __phys_to_dma.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm/include/asm/dma-direct.h | 2 +-
arch/mips/bmips/dma.c | 2 +-
arch/mips/cavium-octeon/dma-octeon.c | 2 +-
arch/mips/include/asm/dma-direct.h | 2 +-
arch/mips/loongson2ef/fuloong-2e/dma.c | 2 +-
arch/mips/loongson2ef/lemote-2f/dma.c | 2 +-
arch/mips/loongson64/dma.c | 2 +-
arch/mips/pci/pci-ar2315.c | 2 +-
arch/mips/pci/pci-xtalk-bridge.c | 2 +-
arch/mips/sgi-ip32/ip32-dma.c | 2 +-
arch/powerpc/include/asm/dma-direct.h | 2 +-
drivers/iommu/intel/iommu.c | 2 +-
include/linux/dma-direct.h | 28 +++++++++++++++-----------
kernel/dma/direct.c | 8 ++++----
kernel/dma/swiotlb.c | 4 ++--
15 files changed, 34 insertions(+), 30 deletions(-)
diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h
index a8cee87a93e8ab..bca0de56753439 100644
--- a/arch/arm/include/asm/dma-direct.h
+++ b/arch/arm/include/asm/dma-direct.h
@@ -2,7 +2,7 @@
#ifndef ASM_ARM_DMA_DIRECT_H
#define ASM_ARM_DMA_DIRECT_H 1
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
unsigned int offset = paddr & ~PAGE_MASK;
return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset;
diff --git a/arch/mips/bmips/dma.c b/arch/mips/bmips/dma.c
index ba2a5d33dfd3fa..49061b870680b9 100644
--- a/arch/mips/bmips/dma.c
+++ b/arch/mips/bmips/dma.c
@@ -40,7 +40,7 @@ static struct bmips_dma_range *bmips_dma_ranges;
#define FLUSH_RAC 0x100
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t pa)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t pa)
{
struct bmips_dma_range *r;
diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
index 388b13ba2558c2..232fa1017b1ec9 100644
--- a/arch/mips/cavium-octeon/dma-octeon.c
+++ b/arch/mips/cavium-octeon/dma-octeon.c
@@ -168,7 +168,7 @@ void __init octeon_pci_dma_init(void)
}
#endif /* CONFIG_PCI */
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
#ifdef CONFIG_PCI
if (dev && dev_is_pci(dev))
diff --git a/arch/mips/include/asm/dma-direct.h b/arch/mips/include/asm/dma-direct.h
index 8e178651c638c2..9a640118316c9d 100644
--- a/arch/mips/include/asm/dma-direct.h
+++ b/arch/mips/include/asm/dma-direct.h
@@ -2,7 +2,7 @@
#ifndef _MIPS_DMA_DIRECT_H
#define _MIPS_DMA_DIRECT_H 1
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr);
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr);
#endif /* _MIPS_DMA_DIRECT_H */
diff --git a/arch/mips/loongson2ef/fuloong-2e/dma.c b/arch/mips/loongson2ef/fuloong-2e/dma.c
index 83fadeb3fd7d56..cea167d8aba8db 100644
--- a/arch/mips/loongson2ef/fuloong-2e/dma.c
+++ b/arch/mips/loongson2ef/fuloong-2e/dma.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-direct.h>
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr | 0x80000000;
}
diff --git a/arch/mips/loongson2ef/lemote-2f/dma.c b/arch/mips/loongson2ef/lemote-2f/dma.c
index 302b43a14eee74..3c9e994563578c 100644
--- a/arch/mips/loongson2ef/lemote-2f/dma.c
+++ b/arch/mips/loongson2ef/lemote-2f/dma.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-direct.h>
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr | 0x80000000;
}
diff --git a/arch/mips/loongson64/dma.c b/arch/mips/loongson64/dma.c
index b3dc5d0bd2b113..364f2f27c8723f 100644
--- a/arch/mips/loongson64/dma.c
+++ b/arch/mips/loongson64/dma.c
@@ -4,7 +4,7 @@
#include <linux/swiotlb.h>
#include <boot_param.h>
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
/* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from
* Loongson-3's 48bit address space and embed it into 40bit */
diff --git a/arch/mips/pci/pci-ar2315.c b/arch/mips/pci/pci-ar2315.c
index d88395684f487d..cef4a47ab06311 100644
--- a/arch/mips/pci/pci-ar2315.c
+++ b/arch/mips/pci/pci-ar2315.c
@@ -170,7 +170,7 @@ static inline dma_addr_t ar2315_dev_offset(struct device *dev)
return 0;
}
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr + ar2315_dev_offset(dev);
}
diff --git a/arch/mips/pci/pci-xtalk-bridge.c b/arch/mips/pci/pci-xtalk-bridge.c
index f1b37f32b55395..50f7d42cca5a78 100644
--- a/arch/mips/pci/pci-xtalk-bridge.c
+++ b/arch/mips/pci/pci-xtalk-bridge.c
@@ -25,7 +25,7 @@
/*
* Common phys<->dma mapping for platforms using pci xtalk bridge
*/
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus);
diff --git a/arch/mips/sgi-ip32/ip32-dma.c b/arch/mips/sgi-ip32/ip32-dma.c
index 160317294d97a9..20c6da9d76bc5e 100644
--- a/arch/mips/sgi-ip32/ip32-dma.c
+++ b/arch/mips/sgi-ip32/ip32-dma.c
@@ -18,7 +18,7 @@
#define RAM_OFFSET_MASK 0x3fffffffUL
-dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
dma_addr_t dma_addr = paddr & RAM_OFFSET_MASK;
diff --git a/arch/powerpc/include/asm/dma-direct.h b/arch/powerpc/include/asm/dma-direct.h
index 95b09313d2a4cf..128304cbee1d87 100644
--- a/arch/powerpc/include/asm/dma-direct.h
+++ b/arch/powerpc/include/asm/dma-direct.h
@@ -2,7 +2,7 @@
#ifndef ASM_POWERPC_DMA_DIRECT_H
#define ASM_POWERPC_DMA_DIRECT_H 1
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr + dev->archdata.dma_offset;
}
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e9864e52b0e96a..99aa80456b7145 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -3736,7 +3736,7 @@ bounce_map_single(struct device *dev, phys_addr_t paddr, size_t size,
*/
if (!IS_ALIGNED(paddr | size, VTD_PAGE_SIZE)) {
tlb_addr = swiotlb_tbl_map_single(dev,
- __phys_to_dma(dev, io_tlb_start),
+ phys_to_dma_unencrypted(dev, io_tlb_start),
paddr, size, aligned_size, dir, attrs);
if (tlb_addr == DMA_MAPPING_ERROR) {
goto swiotlb_error;
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 811582a39e291f..3797ecccc15466 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -16,14 +16,29 @@ extern unsigned int zone_dma_bits;
#ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
#include <asm/dma-direct.h>
+#ifndef phys_to_dma_unencrypted
+#define phys_to_dma_unencrypted phys_to_dma
+#endif
#else
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+static inline dma_addr_t phys_to_dma_unencrypted(struct device *dev,
+ phys_addr_t paddr)
{
dma_addr_t dev_addr = (dma_addr_t)paddr;
return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
}
+/*
+ * If memory encryption is supported, phys_to_dma will set the memory encryption
+ * bit in the DMA address, and dma_to_phys will clear it.
+ * phys_to_dma_unencrypted is for use on special unencrypted memory like swiotlb
+ * buffers.
+ */
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+ return __sme_set(phys_to_dma_unencrypted(dev, paddr));
+}
+
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
{
phys_addr_t paddr = (phys_addr_t)dev_addr +
@@ -47,17 +62,6 @@ static inline bool force_dma_unencrypted(struct device *dev)
}
#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
-/*
- * If memory encryption is supported, phys_to_dma will set the memory encryption
- * bit in the DMA address, and dma_to_phys will clear it. The raw __phys_to_dma
- * version should only be used on non-encrypted memory for
- * special occasions like DMA coherent buffers.
- */
-static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
-{
- return __sme_set(__phys_to_dma(dev, paddr));
-}
-
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
bool is_ram)
{
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index a97835983a34f7..e7963e51660792 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -25,7 +25,7 @@ static inline dma_addr_t phys_to_dma_direct(struct device *dev,
phys_addr_t phys)
{
if (force_dma_unencrypted(dev))
- return __phys_to_dma(dev, phys);
+ return phys_to_dma_unencrypted(dev, phys);
return phys_to_dma(dev, phys);
}
@@ -433,13 +433,13 @@ int dma_direct_supported(struct device *dev, u64 mask)
return 1;
/*
- * This check needs to be against the actual bit mask value, so
- * use __phys_to_dma() here so that the SME encryption mask isn't
+ * This check needs to be against the actual bit mask value, so use
+ * phys_to_dma_unencrypted() here so that the SME encryption mask isn't
* part of the check.
*/
if (IS_ENABLED(CONFIG_ZONE_DMA))
min_mask = min_t(u64, min_mask, DMA_BIT_MASK(zone_dma_bits));
- return mask >= __phys_to_dma(dev, min_mask);
+ return mask >= phys_to_dma_unencrypted(dev, min_mask);
}
size_t dma_direct_max_mapping_size(struct device *dev)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index c19379fabd200e..4ea72d145cd27d 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -670,13 +670,13 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size,
swiotlb_force);
swiotlb_addr = swiotlb_tbl_map_single(dev,
- __phys_to_dma(dev, io_tlb_start),
+ phys_to_dma_unencrypted(dev, io_tlb_start),
paddr, size, size, dir, attrs);
if (swiotlb_addr == (phys_addr_t)DMA_MAPPING_ERROR)
return DMA_MAPPING_ERROR;
/* Ensure that the address returned is DMA'ble */
- dma_addr = __phys_to_dma(dev, swiotlb_addr);
+ dma_addr = phys_to_dma_unencrypted(dev, swiotlb_addr);
if (unlikely(!dma_capable(dev, dma_addr, size, true))) {
swiotlb_tbl_unmap_single(dev, swiotlb_addr, size, size, dir,
attrs | DMA_ATTR_SKIP_CPU_SYNC);
--
2.28.0
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-08-19 6:57 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200819065610eucas1p2fde88e81917071b1888e7cc01ba0f298@eucas1p2.samsung.com>
2020-08-19 6:55 ` a saner API for allocating DMA addressable pages Christoph Hellwig
2020-08-19 6:55 ` [PATCH 01/28] mm: turn alloc_pages into an inline function Christoph Hellwig
2020-08-19 6:55 ` [PATCH 02/28] drm/exynos: stop setting DMA_ATTR_NON_CONSISTENT Christoph Hellwig
2020-08-19 6:55 ` [PATCH 03/28] drm/nouveau/gk20a: " Christoph Hellwig
2020-08-19 6:55 ` [PATCH 04/28] net/au1000-eth: stop using DMA_ATTR_NON_CONSISTENT Christoph Hellwig
2020-08-19 6:55 ` [PATCH 05/28] media/v4l2: remove V4L2-FLAG-MEMORY-NON-CONSISTENT Christoph Hellwig
2020-08-19 11:16 ` Tomasz Figa
2020-08-19 11:51 ` Robin Murphy
2020-08-19 12:49 ` Tomasz Figa
2020-08-19 13:57 ` Christoph Hellwig
2020-08-19 14:11 ` Tomasz Figa
2020-08-20 4:45 ` Christoph Hellwig
2020-08-20 10:09 ` Tomasz Figa
2020-08-20 16:51 ` Christoph Hellwig
2020-08-19 14:07 ` Robin Murphy
2020-08-19 14:22 ` Tomasz Figa
2020-08-20 4:52 ` Christoph Hellwig
2020-08-20 5:02 ` Christoph Hellwig
2020-08-20 10:24 ` Tomasz Figa
2020-08-20 16:52 ` Christoph Hellwig
2020-08-20 17:41 ` Tomasz Figa
2020-08-19 13:54 ` Christoph Hellwig
2020-08-19 13:57 ` Tomasz Figa
2020-08-20 4:43 ` Christoph Hellwig
2020-08-20 5:20 ` Christoph Hellwig
2020-08-20 10:05 ` Tomasz Figa
2020-08-20 16:54 ` Christoph Hellwig
2020-08-20 17:33 ` Tomasz Figa
2020-09-01 11:06 ` Christoph Hellwig
2020-09-01 15:02 ` Tomasz Figa
2020-08-19 6:55 ` [PATCH 06/28] lib82596: move DMA allocation into the callers of i82596_probe Christoph Hellwig
2020-09-01 13:29 ` Thomas Bogendoerfer
2020-08-19 6:55 ` [PATCH 07/28] 53c700: improve non-coherent DMA handling Christoph Hellwig
2020-09-01 14:52 ` James Bottomley
2020-09-01 15:05 ` Matthew Wilcox
2020-09-01 15:22 ` James Bottomley
2020-09-01 16:21 ` Helge Deller
2020-09-01 16:41 ` Helge Deller
2020-09-01 16:53 ` Matthew Wilcox
2020-09-02 15:00 ` Helge Deller
2020-08-19 6:55 ` [PATCH 08/28] MIPS: make dma_sync_*_for_cpu a little less overzealous Christoph Hellwig
2020-09-01 13:53 ` Thomas Bogendoerfer
2020-08-19 6:55 ` [PATCH 09/28] MIPS/jazzdma: remove the unused vdma_remap function Christoph Hellwig
2020-09-01 13:49 ` Thomas Bogendoerfer
2020-08-19 6:55 ` [PATCH 10/28] MIPS/jazzdma: decouple from dma-direct Christoph Hellwig
2020-09-01 13:49 ` Thomas Bogendoerfer
2020-08-19 6:55 ` [PATCH 11/28] dma-mapping: add (back) arch_dma_mark_clean for ia64 Christoph Hellwig
2020-08-19 6:55 ` [PATCH 12/28] dma-direct: remove dma_direct_{alloc,free}_pages Christoph Hellwig
2020-08-19 6:55 ` [PATCH 13/28] dma-direct: lift gfp_t manipulation out of__dma_direct_alloc_pages Christoph Hellwig
2020-08-19 6:55 ` [PATCH 14/28] dma-direct: use phys_to_dma_direct in dma_direct_alloc Christoph Hellwig
2020-08-19 6:55 ` [PATCH 15/28] dma-direct: remove __dma_to_phys Christoph Hellwig
2020-08-19 6:55 ` Christoph Hellwig [this message]
2020-08-19 6:55 ` [PATCH 17/28] dma-mapping: move dma_common_{mmap, get_sgtable} out of mapping.c Christoph Hellwig
2020-08-19 6:55 ` [PATCH 18/28] dma-mapping: move the dma_declare_coherent_memory documentation Christoph Hellwig
2020-08-19 6:55 ` [PATCH 19/28] dma-mapping: replace DMA_ATTR_NON_CONSISTENT with dma_{alloc, free}_pages Christoph Hellwig
2020-08-19 15:03 ` Tomasz Figa
2020-08-20 5:15 ` Christoph Hellwig
2020-08-19 6:55 ` [PATCH 20/28] sgiwd93: convert from dma_cache_sync to dma_sync_single_for_device Christoph Hellwig
2020-08-19 6:55 ` [PATCH 21/28] hal2: " Christoph Hellwig
2020-08-19 6:55 ` [PATCH 22/28] sgiseeq: " Christoph Hellwig
2020-09-01 15:22 ` Thomas Bogendoerfer
2020-09-01 17:12 ` Thomas Bogendoerfer
2020-09-01 17:16 ` Christoph Hellwig
2020-09-01 17:38 ` Thomas Bogendoerfer
2020-09-02 21:38 ` Thomas Bogendoerfer
2020-09-03 8:42 ` Christoph Hellwig
2020-09-03 8:43 ` Christoph Hellwig
2020-09-03 8:46 ` Christoph Hellwig
2020-08-19 6:55 ` [PATCH 23/28] lib82596: " Christoph Hellwig
2020-08-19 6:55 ` [PATCH 24/28] 53c700: " Christoph Hellwig
2020-08-19 6:55 ` [PATCH 25/28] dma-mapping: remove dma_cache_sync Christoph Hellwig
2020-08-19 6:55 ` [PATCH 26/28] dmapool: add dma_alloc_pages support Christoph Hellwig
2020-08-19 6:55 ` [PATCH 27/28] nvme-pci: fix PRP pool size Christoph Hellwig
2020-08-19 6:55 ` [PATCH 28/28] nvme-pci: use dma_alloc_pages backed dmapools Christoph Hellwig
2020-08-25 11:30 ` a saner API for allocating DMA addressable pages Marek Szyprowski
2020-08-25 13:26 ` Christoph Hellwig
2020-08-29 9:46 ` Helge Deller
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