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From: Christoph Hellwig <hch@lst.de>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-arch@vger.kernel.org, linux-mm@kvack.org,
	iommu@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 30/34] powerpc/dma: remove dma_nommu_mmap_coherent
Date: Wed, 14 Nov 2018 09:23:10 +0100
Message-ID: <20181114082314.8965-31-hch@lst.de> (raw)
In-Reply-To: <20181114082314.8965-1-hch@lst.de>

The coherent cache version of this function already is functionally
identicall to the default version, and by defining the
arch_dma_coherent_to_pfn hook the same is ture for the noncoherent
version as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/powerpc/include/asm/dma-mapping.h |  4 ----
 arch/powerpc/kernel/dma-iommu.c        |  1 -
 arch/powerpc/kernel/dma-swiotlb.c      |  1 -
 arch/powerpc/kernel/dma.c              | 19 -------------------
 arch/powerpc/mm/dma-noncoherent.c      |  7 +++++--
 arch/powerpc/platforms/Kconfig.cputype |  1 +
 arch/powerpc/platforms/pseries/vio.c   |  1 -
 7 files changed, 6 insertions(+), 28 deletions(-)

diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 16d45518d9bb..f19c486e7b3f 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -25,10 +25,6 @@ extern void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
 extern void __dma_nommu_free_coherent(struct device *dev, size_t size,
 				       void *vaddr, dma_addr_t dma_handle,
 				       unsigned long attrs);
-extern int dma_nommu_mmap_coherent(struct device *dev,
-				    struct vm_area_struct *vma,
-				    void *cpu_addr, dma_addr_t handle,
-				    size_t size, unsigned long attrs);
 int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl,
 		int nents, enum dma_data_direction direction,
 		unsigned long attrs);
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index 4937b39e246b..5b15e53ee43d 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -172,7 +172,6 @@ int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr)
 const struct dma_map_ops dma_iommu_ops = {
 	.alloc			= dma_iommu_alloc_coherent,
 	.free			= dma_iommu_free_coherent,
-	.mmap			= dma_nommu_mmap_coherent,
 	.map_sg			= dma_iommu_map_sg,
 	.unmap_sg		= dma_iommu_unmap_sg,
 	.dma_supported		= dma_iommu_dma_supported,
diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c
index b3266f7a6915..03df252ff5fb 100644
--- a/arch/powerpc/kernel/dma-swiotlb.c
+++ b/arch/powerpc/kernel/dma-swiotlb.c
@@ -42,7 +42,6 @@ unsigned int ppc_swiotlb_enable;
 const struct dma_map_ops powerpc_swiotlb_dma_ops = {
 	.alloc = __dma_nommu_alloc_coherent,
 	.free = __dma_nommu_free_coherent,
-	.mmap = dma_nommu_mmap_coherent,
 	.map_sg = swiotlb_map_sg_attrs,
 	.unmap_sg = swiotlb_unmap_sg_attrs,
 	.dma_supported = swiotlb_dma_supported,
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 5c83a34f288f..a6590aa77181 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -113,24 +113,6 @@ void __dma_nommu_free_coherent(struct device *dev, size_t size,
 }
 #endif /* !CONFIG_NOT_COHERENT_CACHE */
 
-int dma_nommu_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
-			     void *cpu_addr, dma_addr_t handle, size_t size,
-			     unsigned long attrs)
-{
-	unsigned long pfn;
-
-#ifdef CONFIG_NOT_COHERENT_CACHE
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-	pfn = __dma_get_coherent_pfn((unsigned long)cpu_addr);
-#else
-	pfn = page_to_pfn(virt_to_page(cpu_addr));
-#endif
-	return remap_pfn_range(vma, vma->vm_start,
-			       pfn + vma->vm_pgoff,
-			       vma->vm_end - vma->vm_start,
-			       vma->vm_page_prot);
-}
-
 int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl,
 		int nents, enum dma_data_direction direction,
 		unsigned long attrs)
@@ -196,7 +178,6 @@ static inline void dma_nommu_sync_single(struct device *dev,
 const struct dma_map_ops dma_nommu_ops = {
 	.alloc				= __dma_nommu_alloc_coherent,
 	.free				= __dma_nommu_free_coherent,
-	.mmap				= dma_nommu_mmap_coherent,
 	.map_sg				= dma_nommu_map_sg,
 	.dma_supported			= dma_nommu_dma_supported,
 	.map_page			= dma_nommu_map_page,
diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c
index e955539686a4..ee95da19c82d 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -30,6 +30,7 @@
 #include <linux/types.h>
 #include <linux/highmem.h>
 #include <linux/dma-direct.h>
+#include <linux/dma-noncoherent.h>
 #include <linux/export.h>
 
 #include <asm/tlbflush.h>
@@ -400,14 +401,16 @@ EXPORT_SYMBOL(__dma_sync_page);
 
 /*
  * Return the PFN for a given cpu virtual address returned by
- * __dma_nommu_alloc_coherent. This is used by dma_mmap_coherent()
+ * __dma_nommu_alloc_coherent.
  */
-unsigned long __dma_get_coherent_pfn(unsigned long cpu_addr)
+long arch_dma_coherent_to_pfn(struct device *dev, void *vaddr,
+		dma_addr_t dma_addr)
 {
 	/* This should always be populated, so we don't test every
 	 * level. If that fails, we'll have a nice crash which
 	 * will be as good as a BUG_ON()
 	 */
+	unsigned long cpu_addr = (unsigned long)vaddr;
 	pgd_t *pgd = pgd_offset_k(cpu_addr);
 	pud_t *pud = pud_offset(pgd, cpu_addr);
 	pmd_t *pmd = pmd_offset(pud, cpu_addr);
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 6fedbf349fce..5fdfc1a6435c 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -414,6 +414,7 @@ config NOT_COHERENT_CACHE
 	bool
 	depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
 		GAMECUBE_COMMON || AMIGAONE
+	select ARCH_HAS_DMA_COHERENT_TO_PFN
 	default n if PPC_47x
 	default y
 
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index ea3a9745c812..63dbc4cfe60d 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -603,7 +603,6 @@ static void vio_dma_iommu_unmap_sg(struct device *dev,
 static const struct dma_map_ops vio_dma_mapping_ops = {
 	.alloc             = vio_dma_iommu_alloc_coherent,
 	.free              = vio_dma_iommu_free_coherent,
-	.mmap		   = dma_nommu_mmap_coherent,
 	.map_sg            = vio_dma_iommu_map_sg,
 	.unmap_sg          = vio_dma_iommu_unmap_sg,
 	.map_page          = vio_dma_iommu_map_page,
-- 
2.19.1


  parent reply index

Thread overview: 175+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14  8:22 use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-14  8:22 ` [PATCH 01/34] powerpc: use mm zones more sensibly Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-12-07 12:18     ` Michael Ellerman
2018-12-07 14:09       ` Christoph Hellwig
2018-12-07 15:04         ` Christian Zigotzky
2018-11-14  8:22 ` [PATCH 02/34] powerpc: allow NOT_COHERENT_CACHE for amigaone Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 03/34] powerpc/dma: remove the unused ARCH_HAS_DMA_MMAP_COHERENT define Christoph Hellwig
2018-12-06 14:09   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 04/34] powerpc/dma: remove the unused ISA_DMA_THRESHOLD export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 05/34] powerpc/dma: remove the unused dma_iommu_ops export Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 06/34] powerpc/dma: split the two __dma_alloc_coherent implementations Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 07/34] powerpc/dma: remove the no-op dma_nommu_unmap_{page, sg} routines Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 08/34] powerpc/dma: untangle vio_dma_mapping_ops from dma_iommu_ops Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 09/34] powerpc/dma: handle iommu bypass in dma_iommu_ops Christoph Hellwig
2018-11-14  8:22 ` [PATCH 10/34] powerpc/pseries: unwind dma_get_required_mask_pSeriesLP a bit Christoph Hellwig
2018-11-14  8:22 ` [PATCH 11/34] powerpc/pseries: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 12/34] powerpc/cell: move dma direct window setup out of dma_configure Christoph Hellwig
2018-12-09 10:23   ` Michael Ellerman
2018-12-12 14:36     ` Christoph Hellwig
2018-12-14 13:29       ` Michael Ellerman
2018-12-14 16:42         ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 13/34] powerpc/cell: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 14/34] powerpc/dart: remove dead cleanup code in iommu_init_early_dart Christoph Hellwig
2018-12-06 14:11   ` Christoph Hellwig
2018-11-14  8:22 ` [PATCH 15/34] powerpc/dart: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 16/34] powerpc/powernv: remove pnv_pci_ioda_pe_single_vendor Christoph Hellwig
2018-11-14  8:22 ` [PATCH 17/34] powerpc/powernv: remove pnv_npu_dma_set_mask Christoph Hellwig
2018-11-14  8:22 ` [PATCH 18/34] powerpc/powernv: use the generic iommu bypass code Christoph Hellwig
2018-11-14  8:22 ` [PATCH 19/34] cxl: drop the dma_set_mask callback from vphb Christoph Hellwig
2018-12-06 14:10   ` Christoph Hellwig
2018-11-14  8:23 ` [PATCH 20/34] powerpc/dma: stop overriding dma_get_required_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 21/34] powerpc/pci: remove the dma_set_mask pci_controller ops methods Christoph Hellwig
2018-11-14  8:23 ` [PATCH 22/34] powerpc/dma: remove the iommu fallback for coherent allocations Christoph Hellwig
2018-11-14  8:23 ` [PATCH 23/34] powerpc/dma: remove get_pci_dma_ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 24/34] powerpc/dma: move pci_dma_dev_setup_swiotlb to fsl_pci.c Christoph Hellwig
2018-11-14  8:23 ` [PATCH 25/34] powerpc/dma: remove max_direct_dma_addr Christoph Hellwig
2018-11-14  8:23 ` [PATCH 26/34] powerpc/dma: fix an off-by-one in dma_capable Christoph Hellwig
2018-11-14  8:23 ` [PATCH 27/34] powerpc/fsl_pci: simplify fsl_pci_dma_set_mask Christoph Hellwig
2018-11-14  8:23 ` [PATCH 28/34] dma-mapping, powerpc: simplify the arch dma_set_mask override Christoph Hellwig
2018-11-14  8:23 ` [PATCH 29/34] powerpc/dma: use phys_to_dma instead of get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` Christoph Hellwig [this message]
2018-11-14  8:23 ` [PATCH 31/34] powerpc/dma: use generic direct and swiotlb ops Christoph Hellwig
2018-11-14  8:23 ` [PATCH 32/34] powerpc/dma: remove get_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 33/34] powerpc/dma: remove set_dma_offset Christoph Hellwig
2018-11-14  8:23 ` [PATCH 34/34] powerpc/dma: trim the fat from <asm/dma-mapping.h> Christoph Hellwig
2018-11-27  7:42 ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-11-27 22:05   ` Benjamin Herrenschmidt
2018-11-28 11:05   ` Michael Ellerman
2018-11-28 15:55     ` Christian Zigotzky
2018-11-28 20:02       ` Christian Zigotzky
2018-11-28 20:35       ` Michal Suchánek
2018-11-29 17:03         ` Christoph Hellwig
2018-11-29 12:05     ` Christian Zigotzky
2018-11-29 15:30       ` Christian Zigotzky
2018-11-29 17:03       ` Christoph Hellwig
2018-11-29 23:07         ` Christian Zigotzky
2018-11-30 10:53           ` Christoph Hellwig
2018-11-30 12:23             ` Christian Zigotzky
2018-11-30 13:10               ` Christoph Hellwig
2018-11-30 15:29                 ` Christian Zigotzky
2018-12-04  7:31                   ` Christian Zigotzky
2018-12-04  9:53                     ` Christian Zigotzky
2018-12-04 14:24                       ` Christoph Hellwig
2018-12-05  9:44                         ` Christian Zigotzky
2018-12-05 14:05                           ` Christoph Hellwig
2018-12-06 10:55                             ` Christian Zigotzky
2018-12-06 17:10                               ` Christian Zigotzky
2018-12-06 19:36                                 ` Christoph Hellwig
2018-12-07  7:48                                   ` Christian Zigotzky
2018-12-07 13:45                               ` Christian Zigotzky
2018-12-07 18:33                                 ` Christian Zigotzky
2018-12-08 10:29                                   ` Christian Zigotzky
2018-12-08 13:47                                     ` Christian Zigotzky
2018-12-09 14:20                                       ` Christian Zigotzky
2018-12-09 18:26                                         ` Christian Zigotzky
2018-12-10 15:54                                           ` Christian Zigotzky
2018-12-11 14:28                                             ` Christian Zigotzky
2018-12-11 18:17                                               ` Christian Zigotzky
2018-12-12  0:47                                                 ` Benjamin Herrenschmidt
2018-12-12  7:03                                                   ` Christian Zigotzky
2018-12-12 14:15                                                 ` Christoph Hellwig
2018-12-12 14:39                                                   ` Christian Zigotzky
2018-12-13  8:41                                                     ` Christian Zigotzky
2018-12-13  9:10                                                       ` Christoph Hellwig
2018-12-13  9:47                                                         ` Christian Zigotzky
2018-12-13 11:19                                                           ` Christian Zigotzky
2018-12-13 11:25                                                             ` Christoph Hellwig
2018-12-13 13:34                                                               ` Christian Zigotzky
2018-12-13 17:48                                                                 ` Christian Zigotzky
2018-12-13 21:53                                                                   ` Christian Zigotzky
2018-12-14 12:00                                                                     ` Christian Zigotzky
2018-12-14 16:45                                                                       ` Christoph Hellwig
2019-01-03  7:36                                                                       ` Christoph Hellwig
2019-01-03 19:26                                                                         ` Christian Zigotzky
2019-01-05 16:03                                                                           ` Christian Zigotzky
2019-01-09  9:31                                                                             ` Christian Zigotzky
2019-01-11  2:10                                                                               ` Christian Zigotzky
2019-01-12 18:14                                                                                 ` Christian Zigotzky
2019-01-15  8:07                                                                                   ` Christian Zigotzky
2019-01-15  8:49                                                                                     ` Christian Zigotzky
2019-01-15 10:55                                                                                       ` Christian Zigotzky
2019-01-15 13:35                                                                                         ` Christoph Hellwig
2019-01-15 13:56                                                                                           ` Christian Zigotzky
2019-01-15 15:17                                                                                             ` Christoph Hellwig
2019-01-17  9:21                                                                                               ` Christian Zigotzky
2019-01-17  9:31                                                                                                 ` Christoph Hellwig
2019-01-17  9:44                                                                                                   ` Christian Zigotzky
2019-01-18  8:35                                                                                                 ` Christoph Hellwig
2019-01-18 11:10                                                                                                   ` Christian Zigotzky
2019-01-18 11:28                                                                                                     ` Christoph Hellwig
2019-01-18 12:07                                                                                                       ` Christian Zigotzky
2019-01-18 12:18                                                                                                         ` Christoph Hellwig
2019-01-18 12:46                                                                                                           ` Christian Zigotzky
2019-01-18 12:55                                                                                                             ` Christoph Hellwig
2019-01-18 15:06                                                                                                               ` Christian Zigotzky
2019-01-19 11:40                                                                                                                 ` Christian Zigotzky
2019-01-19 11:52                                                                                                                   ` Christian Zigotzky
2019-01-19 13:02                                                                                                                     ` Christoph Hellwig
2019-01-19 14:04                                                                                                                       ` Christoph Hellwig
2019-01-21 14:38                                                                                                                         ` Christian Zigotzky
2019-01-23 14:34                                                                                                                           ` Christian Zigotzky
2019-01-25 13:37                                                                                                                             ` Christian Zigotzky
2019-01-27 13:13                                                                                                                               ` Christian Zigotzky
2019-01-28  7:04                                                                                                                                 ` Christoph Hellwig
2019-01-28 16:22                                                                                                                                   ` Christoph Hellwig
2019-01-28 16:52                                                                                                                                     ` Christian Zigotzky
2019-01-29 15:03                                                                                                                                       ` Christian Zigotzky
2019-01-29 16:14                                                                                                                                         ` Christoph Hellwig
2019-01-29 16:34                                                                                                                                           ` Christoph Hellwig
2019-01-30  4:40                                                                                                                                             ` Christian Zigotzky
2019-01-31 12:48                                                                                                                                               ` Christian Zigotzky
2019-02-01  8:04                                                                                                                                                 ` Christoph Hellwig
2019-02-01 16:54                                                                                                                                                   ` Christian Zigotzky
2019-02-03 16:49                                                                                                                                                     ` Christian Zigotzky
2019-02-04  7:56                                                                                                                                                       ` Christoph Hellwig
2019-02-04 12:13                                                                                                                                                         ` Christian Zigotzky
2019-02-04 12:38                                                                                                                                                           ` Christoph Hellwig
2019-02-06 13:45                                                                                                                                                             ` Christian Zigotzky
2019-02-06 15:15                                                                                                                                                               ` Christoph Hellwig
2019-02-06 15:16                                                                                                                                                                 ` Christoph Hellwig
2019-02-07  4:34                                                                                                                                                                   ` Christian Zigotzky
2019-02-08  9:01                                                                                                                                                                     ` Christian Zigotzky
2019-02-08  9:18                                                                                                                                                                       ` Christoph Hellwig
2019-02-08 10:59                                                                                                                                                                         ` Christian Zigotzky
2019-02-09 19:26                                                                                                                                                                         ` Darren Stevens
2019-02-09 21:10                                                                                                                                                                         ` Darren Stevens
2019-02-11  7:41                                                                                                                                                                           ` Christoph Hellwig
2019-02-10 12:00                                                                                                                                                                         ` Christian Zigotzky
     [not found]                                                                                                                                                                           ` <0042290A-2939-4EBA-A638-D404FA2055ED@xenosoft.de>
2019-02-11  7:21                                                                                                                                                                             ` Christian Zigotzky
2019-02-11  7:38                                                                                                                                                                           ` Christoph Hellwig
2019-02-12 12:42                                                                                                                                                                             ` Christian Zigotzky
2019-02-12 15:25                                                                                                                                                                               ` Christoph Hellwig
2019-02-12 19:31                                                                                                                                                                                 ` Christian Zigotzky
2019-02-12 19:50                                                                                                                                                                                   ` Christian Zigotzky
2019-02-12 19:52                                                                                                                                                                                     ` Christoph Hellwig
     [not found]                                                                               ` <46025f1b-db20-ac23-7dcd-10bc43bbb6ee@xenosoft.de>
     [not found]                                                                                 ` <20191105162856.GA15402@lst.de>
2019-11-07  9:53                                                                                   ` Bug 205201 - overflow of DMA mask and bus mask Christian Zigotzky
2019-11-10  7:27                                                                                     ` Christian Zigotzky
2019-11-11  8:12                                                                                       ` Christian Zigotzky
2019-11-11  8:16                                                                                         ` Christian Zigotzky
2019-11-11 12:22                                                                                           ` Christian Zigotzky
2019-11-12 14:41                                                                                             ` Christoph Hellwig
2019-11-12 22:58                                                                                               ` Christian Zigotzky
2019-11-13 10:14                                                                                               ` Christian Zigotzky
2019-11-13 11:02                                                                                                 ` Christoph Hellwig
2018-11-29 17:02     ` use generic DMA mapping code in powerpc V4 Christoph Hellwig
2018-12-08 17:03 ` Christoph Hellwig
2018-12-16 16:51 ` Christoph Hellwig
2018-12-17  1:14   ` Michael Ellerman

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