From: Christoph Hellwig <hch@lst.de>
To: unlisted-recipients:; (no To-header on input)
Cc: linux-arch@vger.kernel.org, Michal Simek <monstr@monstr.eu>,
Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org,
linux-m68k@vger.kernel.org, nios2-dev@lists.rocketboards.org,
openrisc@lists.librecores.org, linux-parisc@vger.kernel.org,
linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org
Subject: [PATCH 20/22] xtensa: use generic dma_noncoherent_ops
Date: Fri, 20 Apr 2018 10:03:11 +0200 [thread overview]
Message-ID: <20180420080313.18796-21-hch@lst.de> (raw)
In-Reply-To: <20180420080313.18796-1-hch@lst.de>
Switch to the generic noncoherent direct mapping implementation.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/xtensa/Kconfig | 3 +
arch/xtensa/include/asm/Kbuild | 1 +
arch/xtensa/include/asm/dma-mapping.h | 26 ------
arch/xtensa/kernel/pci-dma.c | 130 +++-----------------------
4 files changed, 19 insertions(+), 141 deletions(-)
delete mode 100644 arch/xtensa/include/asm/dma-mapping.h
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index c921e8bccdc8..6035845f30a7 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -5,11 +5,14 @@ config ZONE_DMA
config XTENSA
def_bool y
select ARCH_NO_COHERENT_DMA_MMAP if !MMU
+ select ARCH_HAS_SYNC_DMA_FOR_CPU
+ select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select COMMON_CLK
+ select DMA_NONCOHERENT_OPS
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select GENERIC_IRQ_SHOW
diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild
index 436b20337168..a8d6cd3bee4b 100644
--- a/arch/xtensa/include/asm/Kbuild
+++ b/arch/xtensa/include/asm/Kbuild
@@ -2,6 +2,7 @@ generic-y += bug.h
generic-y += device.h
generic-y += div64.h
generic-y += dma-contiguous.h
+generic-y += dma-mapping.h
generic-y += emergency-restart.h
generic-y += exec.h
generic-y += extable.h
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
deleted file mode 100644
index 44098800dad7..000000000000
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2003 - 2005 Tensilica Inc.
- * Copyright (C) 2015 Cadence Design Systems Inc.
- */
-
-#ifndef _XTENSA_DMA_MAPPING_H
-#define _XTENSA_DMA_MAPPING_H
-
-#include <asm/cache.h>
-#include <asm/io.h>
-
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-
-extern const struct dma_map_ops xtensa_dma_map_ops;
-
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
-{
- return &xtensa_dma_map_ops;
-}
-
-#endif /* _XTENSA_DMA_MAPPING_H */
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c
index 392b4a80ebc2..a83d60e92908 100644
--- a/arch/xtensa/kernel/pci-dma.c
+++ b/arch/xtensa/kernel/pci-dma.c
@@ -16,26 +16,24 @@
*/
#include <linux/dma-contiguous.h>
+#include <linux/dma-noncoherent.h>
#include <linux/dma-direct.h>
#include <linux/gfp.h>
#include <linux/highmem.h>
#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/string.h>
#include <linux/types.h>
#include <asm/cacheflush.h>
#include <asm/io.h>
-static void do_cache_op(dma_addr_t dma_handle, size_t size,
+static void do_cache_op(phys_addr_t paddr, size_t size,
void (*fn)(unsigned long, unsigned long))
{
- unsigned long off = dma_handle & (PAGE_SIZE - 1);
- unsigned long pfn = PFN_DOWN(dma_handle);
+ unsigned long off = paddr & (PAGE_SIZE - 1);
+ unsigned long pfn = PFN_DOWN(paddr);
struct page *page = pfn_to_page(pfn);
if (!PageHighMem(page))
- fn((unsigned long)bus_to_virt(dma_handle), size);
+ fn((unsigned long)phys_to_virt(paddr), size);
else
while (size > 0) {
size_t sz = min_t(size_t, size, PAGE_SIZE - off);
@@ -49,14 +47,13 @@ static void do_cache_op(dma_addr_t dma_handle, size_t size,
}
}
-static void xtensa_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir)
{
switch (dir) {
case DMA_BIDIRECTIONAL:
case DMA_FROM_DEVICE:
- do_cache_op(dma_handle, size, __invalidate_dcache_range);
+ do_cache_op(paddr, size, __invalidate_dcache_range);
break;
case DMA_NONE:
@@ -68,15 +65,14 @@ static void xtensa_sync_single_for_cpu(struct device *dev,
}
}
-static void xtensa_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir)
{
switch (dir) {
case DMA_BIDIRECTIONAL:
case DMA_TO_DEVICE:
if (XCHAL_DCACHE_IS_WRITEBACK)
- do_cache_op(dma_handle, size, __flush_dcache_range);
+ do_cache_op(paddr, size, __flush_dcache_range);
break;
case DMA_NONE:
@@ -88,40 +84,13 @@ static void xtensa_sync_single_for_device(struct device *dev,
}
}
-static void xtensa_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
-{
- struct scatterlist *s;
- int i;
-
- for_each_sg(sg, s, nents, i) {
- xtensa_sync_single_for_cpu(dev, sg_dma_address(s),
- sg_dma_len(s), dir);
- }
-}
-
-static void xtensa_sync_sg_for_device(struct device *dev,
- struct scatterlist *sg, int nents,
- enum dma_data_direction dir)
-{
- struct scatterlist *s;
- int i;
-
- for_each_sg(sg, s, nents, i) {
- xtensa_sync_single_for_device(dev, sg_dma_address(s),
- sg_dma_len(s), dir);
- }
-}
-
/*
* Note: We assume that the full memory space is always mapped to 'kseg'
* Otherwise we have to use page attributes (not implemented).
*/
-static void *xtensa_dma_alloc(struct device *dev, size_t size,
- dma_addr_t *handle, gfp_t flag,
- unsigned long attrs)
+void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
+ gfp_t flag, unsigned long attrs)
{
unsigned long ret;
unsigned long uncached;
@@ -171,8 +140,8 @@ static void *xtensa_dma_alloc(struct device *dev, size_t size,
return (void *)uncached;
}
-static void xtensa_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
+void arch_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, unsigned long attrs)
{
unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
unsigned long addr = (unsigned long)vaddr;
@@ -192,72 +161,3 @@ static void xtensa_dma_free(struct device *dev, size_t size, void *vaddr,
if (!dma_release_from_contiguous(dev, page, count))
__free_pages(page, get_order(size));
}
-
-static dma_addr_t xtensa_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- dma_addr_t dma_handle = page_to_phys(page) + offset;
-
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- xtensa_sync_single_for_device(dev, dma_handle, size, dir);
-
- return dma_handle;
-}
-
-static void xtensa_unmap_page(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- xtensa_sync_single_for_cpu(dev, dma_handle, size, dir);
-}
-
-static int xtensa_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *s;
- int i;
-
- for_each_sg(sg, s, nents, i) {
- s->dma_address = xtensa_map_page(dev, sg_page(s), s->offset,
- s->length, dir, attrs);
- }
- return nents;
-}
-
-static void xtensa_unmap_sg(struct device *dev,
- struct scatterlist *sg, int nents,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- struct scatterlist *s;
- int i;
-
- for_each_sg(sg, s, nents, i) {
- xtensa_unmap_page(dev, sg_dma_address(s),
- sg_dma_len(s), dir, attrs);
- }
-}
-
-int xtensa_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return 0;
-}
-
-const struct dma_map_ops xtensa_dma_map_ops = {
- .alloc = xtensa_dma_alloc,
- .free = xtensa_dma_free,
- .map_page = xtensa_map_page,
- .unmap_page = xtensa_unmap_page,
- .map_sg = xtensa_map_sg,
- .unmap_sg = xtensa_unmap_sg,
- .sync_single_for_cpu = xtensa_sync_single_for_cpu,
- .sync_single_for_device = xtensa_sync_single_for_device,
- .sync_sg_for_cpu = xtensa_sync_sg_for_cpu,
- .sync_sg_for_device = xtensa_sync_sg_for_device,
- .mapping_error = xtensa_dma_mapping_error,
-};
-EXPORT_SYMBOL(xtensa_dma_map_ops);
--
2.17.0
next prev parent reply other threads:[~2018-04-20 8:05 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-20 8:02 Christoph Hellwig
2018-04-20 8:02 ` [PATCH 01/22] dma-debug: move initialization to common code Christoph Hellwig
2018-04-20 10:23 ` Robin Murphy
2018-04-24 7:35 ` Christoph Hellwig
2018-04-20 8:02 ` [PATCH 02/22] dma-mapping: simplify Kconfig dependencies Christoph Hellwig
2018-04-20 8:02 ` [PATCH 03/22] dma-mapping: provide a generic dma-noncoherent implementation Christoph Hellwig
2018-04-20 8:02 ` [PATCH 04/22] alpha: use dma_direct_ops for jensen Christoph Hellwig
2018-04-20 8:02 ` [PATCH 05/22] alpha: simplify get_arch_dma_ops Christoph Hellwig
2018-04-20 8:02 ` [PATCH 06/22] arc: use generic dma_noncoherent_ops Christoph Hellwig
2018-04-25 11:17 ` Alexey Brodkin
2018-04-26 6:45 ` hch
2018-04-26 8:25 ` hch
2018-04-20 8:02 ` [PATCH 07/22] arm-nommu: " Christoph Hellwig
2018-04-20 8:02 ` [PATCH 08/22] c6x: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 09/22] hexagon: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 10/22] m68k: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 11/22] microblaze: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 12/22] microblaze: remove the consistent_sync and consistent_sync_page Christoph Hellwig
2018-04-20 8:03 ` [PATCH 13/22] nds32: use generic dma_noncoherent_ops Christoph Hellwig
2018-04-23 6:49 ` Greentime Hu
2018-04-24 19:16 ` Christoph Hellwig
2018-04-25 1:43 ` Greentime Hu
2018-04-25 6:40 ` Christoph Hellwig
2018-04-25 12:25 ` Greentime Hu
2018-04-26 6:42 ` Christoph Hellwig
2018-04-26 8:06 ` Greentime Hu
2018-04-26 8:24 ` Christoph Hellwig
2018-04-26 9:39 ` Greentime Hu
2018-04-20 8:03 ` [PATCH 14/22] nios2: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 15/22] openrisc: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 16/22] sh: simplify get_arch_dma_ops Christoph Hellwig
2018-04-20 8:03 ` [PATCH 17/22] sh: introduce a sh_cacheop_vaddr helper Christoph Hellwig
2018-04-20 8:03 ` [PATCH 18/22] sh: use dma_direct_ops for the CONFIG_DMA_COHERENT case Christoph Hellwig
2018-04-20 8:03 ` [PATCH 19/22] sh: use generic dma_noncoherent_ops Christoph Hellwig
2018-04-20 8:03 ` Christoph Hellwig [this message]
2018-04-20 8:03 ` [PATCH 21/22] sparc: " Christoph Hellwig
2018-04-20 8:03 ` [PATCH 22/22] parisc: " Christoph Hellwig
2018-04-21 17:43 ` Helge Deller
2018-04-21 21:52 ` James Bottomley
2018-04-25 7:21 ` Christoph Hellwig
2018-04-25 21:07 ` Helge Deller
2018-04-21 21:42 ` James Bottomley
2018-04-24 8:20 ` Christoph Hellwig
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