From: Leon Romanovsky <leon@kernel•org>
To: Marek Szyprowski <m.szyprowski@samsung•com>,
Robin Murphy <robin.murphy@arm•com>,
Russell King <linux@armlinux•org.uk>,
Juergen Gross <jgross@suse•com>,
Stefano Stabellini <sstabellini@kernel•org>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@epam•com>,
Richard Henderson <richard.henderson@linaro•org>,
Matt Turner <mattst88@gmail•com>,
Thomas Bogendoerfer <tsbogend@alpha•franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership•com>,
Helge Deller <deller@gmx•de>,
Madhavan Srinivasan <maddy@linux•ibm.com>,
Michael Ellerman <mpe@ellerman•id.au>,
Nicholas Piggin <npiggin@gmail•com>,
Christophe Leroy <christophe.leroy@csgroup•eu>,
Geoff Levand <geoff@infradead•org>,
"David S. Miller" <davem@davemloft•net>,
Andreas Larsson <andreas@gaisler•com>,
Thomas Gleixner <tglx@linutronix•de>,
Ingo Molnar <mingo@redhat•com>, Borislav Petkov <bp@alien8•de>,
Dave Hansen <dave.hansen@linux•intel.com>,
x86@kernel•org, "H. Peter Anvin" <hpa@zytor•com>
Cc: iommu@lists•linux.dev, linux-kernel@vger•kernel.org,
linux-arm-kernel@lists•infradead.org,
xen-devel@lists•xenproject.org, linux-alpha@vger•kernel.org,
linux-mips@vger•kernel.org, linux-parisc@vger•kernel.org,
linuxppc-dev@lists•ozlabs.org, sparclinux@vger•kernel.org,
Jason Gunthorpe <jgg@ziepe•ca>, Jason Gunthorpe <jgg@nvidia•com>
Subject: [PATCH v5 01/14] dma-mapping: prepare dma_map_ops to conversion to physical address
Date: Wed, 15 Oct 2025 12:12:47 +0300 [thread overview]
Message-ID: <20251015-remove-map-page-v5-1-3bbfe3a25cdf@kernel.org> (raw)
In-Reply-To: <20251015-remove-map-page-v5-0-3bbfe3a25cdf@kernel.org>
From: Leon Romanovsky <leonro@nvidia•com>
Add new .map_phys() and .unmap_phys() callbacks to dma_map_ops as a
preparation to replace .map_page() and .unmap_page() respectively.
Reviewed-by: Jason Gunthorpe <jgg@nvidia•com>
Signed-off-by: Leon Romanovsky <leonro@nvidia•com>
---
include/linux/dma-map-ops.h | 7 +++++++
kernel/dma/mapping.c | 4 ++++
kernel/dma/ops_helpers.c | 12 ++++++++++--
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 10882d00cb17..79d2a74d4b49 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -37,6 +37,13 @@ struct dma_map_ops {
void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir,
unsigned long attrs);
+
+ dma_addr_t (*map_phys)(struct device *dev, phys_addr_t phys,
+ size_t size, enum dma_data_direction dir,
+ unsigned long attrs);
+ void (*unmap_phys)(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction dir,
+ unsigned long attrs);
/*
* map_sg should return a negative error code on error. See
* dma_map_sgtable() for a list of appropriate error codes
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index fe7472f13b10..4080aebe5deb 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -169,6 +169,8 @@ dma_addr_t dma_map_phys(struct device *dev, phys_addr_t phys, size_t size,
addr = dma_direct_map_phys(dev, phys, size, dir, attrs);
else if (use_dma_iommu(dev))
addr = iommu_dma_map_phys(dev, phys, size, dir, attrs);
+ else if (ops->map_phys)
+ addr = ops->map_phys(dev, phys, size, dir, attrs);
else if (is_mmio) {
if (!ops->map_resource)
return DMA_MAPPING_ERROR;
@@ -223,6 +225,8 @@ void dma_unmap_phys(struct device *dev, dma_addr_t addr, size_t size,
dma_direct_unmap_phys(dev, addr, size, dir, attrs);
else if (use_dma_iommu(dev))
iommu_dma_unmap_phys(dev, addr, size, dir, attrs);
+ else if (ops->unmap_phys)
+ ops->unmap_phys(dev, addr, size, dir, attrs);
else if (is_mmio) {
if (ops->unmap_resource)
ops->unmap_resource(dev, addr, size, dir, attrs);
diff --git a/kernel/dma/ops_helpers.c b/kernel/dma/ops_helpers.c
index 6f9d604d9d40..1eccbdbc99c1 100644
--- a/kernel/dma/ops_helpers.c
+++ b/kernel/dma/ops_helpers.c
@@ -64,6 +64,7 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size,
{
const struct dma_map_ops *ops = get_dma_ops(dev);
struct page *page;
+ phys_addr_t phys;
page = dma_alloc_contiguous(dev, size, gfp);
if (!page)
@@ -71,9 +72,13 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size,
if (!page)
return NULL;
+ phys = page_to_phys(page);
if (use_dma_iommu(dev))
- *dma_handle = iommu_dma_map_phys(dev, page_to_phys(page), size,
- dir, DMA_ATTR_SKIP_CPU_SYNC);
+ *dma_handle = iommu_dma_map_phys(dev, phys, size, dir,
+ DMA_ATTR_SKIP_CPU_SYNC);
+ else if (ops->map_phys)
+ *dma_handle = ops->map_phys(dev, phys, size, dir,
+ DMA_ATTR_SKIP_CPU_SYNC);
else
*dma_handle = ops->map_page(dev, page, 0, size, dir,
DMA_ATTR_SKIP_CPU_SYNC);
@@ -94,6 +99,9 @@ void dma_common_free_pages(struct device *dev, size_t size, struct page *page,
if (use_dma_iommu(dev))
iommu_dma_unmap_phys(dev, dma_handle, size, dir,
DMA_ATTR_SKIP_CPU_SYNC);
+ else if (ops->unmap_phys)
+ ops->unmap_phys(dev, dma_handle, size, dir,
+ DMA_ATTR_SKIP_CPU_SYNC);
else if (ops->unmap_page)
ops->unmap_page(dev, dma_handle, size, dir,
DMA_ATTR_SKIP_CPU_SYNC);
--
2.51.0
next prev parent reply other threads:[~2025-10-15 9:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20251015091313eucas1p2426ae40b579d7f3b4f29b46e0e788c0d@eucas1p2.samsung.com>
2025-10-15 9:12 ` [PATCH v5 00/14] Remove DMA map_page/map_resource and their unmap callbacks Leon Romanovsky
2025-10-15 9:12 ` Leon Romanovsky [this message]
2025-10-15 9:12 ` [PATCH v5 02/14] dma-mapping: convert dummy ops to physical address mapping Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 03/14] ARM: dma-mapping: Reduce struct page exposure in arch_sync_dma*() Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 04/14] ARM: dma-mapping: Switch to physical address mapping callbacks Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 05/14] xen: swiotlb: " Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 06/14] dma-mapping: remove unused mapping resource callbacks Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 07/14] alpha: Convert mapping routine to rely on physical address Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 08/14] MIPS/jazzdma: Provide physical address directly Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 09/14] parisc: Convert DMA map_page to map_phys interface Leon Romanovsky
2025-12-17 12:17 ` [PATCH v5 09/14] parisc: Convert DMA map_page to map_phys interface [qemu test failure] Guenter Roeck
2025-12-18 8:40 ` Leon Romanovsky
2025-12-18 12:11 ` Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 10/14] powerpc: Convert to physical address DMA mapping Leon Romanovsky
2025-11-14 9:02 ` Christophe Leroy
2025-10-15 9:12 ` [PATCH v5 11/14] sparc: Use " Leon Romanovsky
2026-02-17 12:27 ` John Paul Adrian Glaubitz
2026-02-17 12:55 ` Marek Szyprowski
2026-02-17 13:15 ` Leon Romanovsky
2026-02-17 13:57 ` John Paul Adrian Glaubitz
2025-10-15 9:12 ` [PATCH v5 12/14] x86: Use physical address for " Leon Romanovsky
2025-10-15 9:12 ` [PATCH v5 13/14] xen: swiotlb: Convert mapping routine to rely on physical address Leon Romanovsky
2025-10-15 9:13 ` [PATCH v5 14/14] dma-mapping: remove unused map_page callback Leon Romanovsky
2025-10-20 16:27 ` [PATCH v5 00/14] Remove DMA map_page/map_resource and their unmap callbacks Marek Szyprowski
2025-10-26 7:38 ` Leon Romanovsky
2025-10-29 10:00 ` Marek Szyprowski
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