dma-mapping: move all DMA mapping code to kernel/dma

Currently the code is split over various files with dma- prefixes in the
lib/ and drives/base directories, and the number of files keeps growing.
Move them into a single directory to keep the code together and remove
the file name prefixes.  To match the irq infrastructure this directory
is placed under the kernel/ directory.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2018-06-12 19:01:45 +02:00
parent e37460c1ca
commit cf65a0f6f6
18 changed files with 69 additions and 72 deletions

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@ -49,10 +49,10 @@ Device Drivers Base
Device Drivers DMA Management
-----------------------------
.. kernel-doc:: drivers/base/dma-coherent.c
.. kernel-doc:: kernel/dma/coherent.c
:export:
.. kernel-doc:: drivers/base/dma-mapping.c
.. kernel-doc:: kernel/dma/mapping.c
:export:
Device drivers PnP support

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@ -4359,12 +4359,7 @@ L: iommu@lists.linux-foundation.org
T: git git://git.infradead.org/users/hch/dma-mapping.git
W: http://git.infradead.org/users/hch/dma-mapping.git
S: Supported
F: lib/dma-debug.c
F: lib/dma-direct.c
F: lib/dma-noncoherent.c
F: lib/dma-virt.c
F: drivers/base/dma-mapping.c
F: drivers/base/dma-coherent.c
F: kernel/dma/
F: include/asm-generic/dma-mapping.h
F: include/linux/dma-direct.h
F: include/linux/dma-mapping.h
@ -13642,7 +13637,7 @@ M: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
L: iommu@lists.linux-foundation.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb.git
S: Supported
F: lib/swiotlb.c
F: kernel/dma/swiotlb.c
F: arch/*/kernel/pci-swiotlb.c
F: include/linux/swiotlb.h

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@ -8,10 +8,7 @@ obj-y := component.o core.o bus.o dd.o syscore.o \
topology.o container.o property.o cacheinfo.o \
devcon.o
obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
obj-y += power/
obj-$(CONFIG_HAS_DMA) += dma-mapping.o
obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_ISA_BUS_API) += isa.o
obj-y += firmware_loader/
obj-$(CONFIG_NUMA) += node.o

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@ -48,7 +48,7 @@
* CMA should not be used by the device drivers directly. It is
* only a helper framework for dma-mapping subsystem.
*
* For more information, see kernel-docs in drivers/base/dma-contiguous.c
* For more information, see kernel-docs in kernel/dma/contiguous.c
*/
#ifdef __KERNEL__

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@ -1719,10 +1719,6 @@ source "arch/Kconfig"
endmenu # General setup
config HAVE_GENERIC_DMA_COHERENT
bool
default n
config RT_MUTEXES
bool

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@ -41,6 +41,7 @@ obj-y += printk/
obj-y += irq/
obj-y += rcu/
obj-y += livepatch/
obj-y += dma/
obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
obj-$(CONFIG_FREEZER) += freezer.o

50
kernel/dma/Kconfig Normal file
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@ -0,0 +1,50 @@
config HAS_DMA
bool
depends on !NO_DMA
default y
config NEED_SG_DMA_LENGTH
bool
config NEED_DMA_MAP_STATE
bool
config ARCH_DMA_ADDR_T_64BIT
def_bool 64BIT || PHYS_ADDR_T_64BIT
config HAVE_GENERIC_DMA_COHERENT
bool
config ARCH_HAS_SYNC_DMA_FOR_DEVICE
bool
config ARCH_HAS_SYNC_DMA_FOR_CPU
bool
select NEED_DMA_MAP_STATE
config DMA_DIRECT_OPS
bool
depends on HAS_DMA
config DMA_NONCOHERENT_OPS
bool
depends on HAS_DMA
select DMA_DIRECT_OPS
config DMA_NONCOHERENT_MMAP
bool
depends on DMA_NONCOHERENT_OPS
config DMA_NONCOHERENT_CACHE_SYNC
bool
depends on DMA_NONCOHERENT_OPS
config DMA_VIRT_OPS
bool
depends on HAS_DMA
config SWIOTLB
bool
select DMA_DIRECT_OPS
select NEED_DMA_MAP_STATE

11
kernel/dma/Makefile Normal file
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@ -0,0 +1,11 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_HAS_DMA) += mapping.o
obj-$(CONFIG_DMA_CMA) += contiguous.o
obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += coherent.o
obj-$(CONFIG_DMA_DIRECT_OPS) += direct.o
obj-$(CONFIG_DMA_NONCOHERENT_OPS) += noncoherent.o
obj-$(CONFIG_DMA_VIRT_OPS) += virt.o
obj-$(CONFIG_DMA_API_DEBUG) += debug.o
obj-$(CONFIG_SWIOTLB) += swiotlb.o

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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* drivers/base/dma-mapping.c - arch-independent dma-mapping routines
* arch-independent dma-mapping routines
*
* Copyright (c) 2006 SUSE Linux Products GmbH
* Copyright (c) 2006 Tejun Heo <teheo@suse.de>

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@ -1,7 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
/*
* lib/dma-virt.c
*
* DMA operations that map to virtual addresses without flushing memory.
*/
#include <linux/export.h>

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@ -420,60 +420,15 @@ config HAS_IOPORT_MAP
depends on HAS_IOMEM && !NO_IOPORT_MAP
default y
config HAS_DMA
bool
depends on !NO_DMA
default y
source "kernel/dma/Kconfig"
config SGL_ALLOC
bool
default n
config NEED_SG_DMA_LENGTH
bool
config NEED_DMA_MAP_STATE
bool
config ARCH_DMA_ADDR_T_64BIT
def_bool 64BIT || PHYS_ADDR_T_64BIT
config IOMMU_HELPER
bool
config ARCH_HAS_SYNC_DMA_FOR_DEVICE
bool
config ARCH_HAS_SYNC_DMA_FOR_CPU
bool
select NEED_DMA_MAP_STATE
config DMA_DIRECT_OPS
bool
depends on HAS_DMA
config DMA_NONCOHERENT_OPS
bool
depends on HAS_DMA
select DMA_DIRECT_OPS
config DMA_NONCOHERENT_MMAP
bool
depends on DMA_NONCOHERENT_OPS
config DMA_NONCOHERENT_CACHE_SYNC
bool
depends on DMA_NONCOHERENT_OPS
config DMA_VIRT_OPS
bool
depends on HAS_DMA
config SWIOTLB
bool
select DMA_DIRECT_OPS
select NEED_DMA_MAP_STATE
config CHECK_SIGNATURE
bool

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@ -29,9 +29,6 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
lib-$(CONFIG_PRINTK) += dump_stack.o
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
obj-$(CONFIG_DMA_DIRECT_OPS) += dma-direct.o
obj-$(CONFIG_DMA_NONCOHERENT_OPS) += dma-noncoherent.o
obj-$(CONFIG_DMA_VIRT_OPS) += dma-virt.o
lib-y += kobject.o klist.o
obj-y += lockref.o
@ -148,7 +145,6 @@ obj-$(CONFIG_SMP) += percpu_counter.o
obj-$(CONFIG_AUDIT_GENERIC) += audit.o
obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o
obj-$(CONFIG_SWIOTLB) += swiotlb.o
obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
@ -169,8 +165,6 @@ obj-$(CONFIG_NLATTR) += nlattr.o
obj-$(CONFIG_LRU_CACHE) += lru_cache.o
obj-$(CONFIG_DMA_API_DEBUG) += dma-debug.o
obj-$(CONFIG_GENERIC_CSUM) += checksum.o
obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o