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Subject[GIT PULL] dma-mapping updates for Linux 4.21
Hi Linus,

an early pull request as requested. Besides the usual contextual
conflicts in Kconfig files that can be solved by taking both updates
and applying them manually there are some real conflicts this time:

- the RISC-V tree has some updates to
Documentation/features/io/sg-chain/arch-support.txt, which is
removed in this tree. It should be put to rest.
- the sparc64 tree has various updates to replace the name field
with the full_name one in the OF device, including in code
that gets refctored in the dma-mapping tree. I've applied an
equivalent change to the refactored version, so take the
dma-mapping tree version of arch/sparc/kernel/ioport.c.


The following changes since commit c9d76d0655c06b8c1f944e46c4fd9e9cf4b331c0:

dma-mapping: fix return type of dma_set_max_seg_size() (2018-11-27 08:39:52 +0100)

are available in the Git repository at:

git://git.infradead.org/users/hch/dma-mapping.git tags/dma-mapping-4.21

for you to fetch changes up to 8b1cce9f5832a8eda17d37a3c49fb7dd2d650f46:

dma-mapping: fix inverted logic in dma_supported (2018-12-20 17:47:55 +0100)

----------------------------------------------------------------
DMA mapping updates for Linux 4.21

A huge update this time, but a lot of that is just consolidating or
removing code:

- provide a common DMA_MAPPING_ERROR definition and avoid indirect
calls for dma_map_* error checking
- use direct calls for the DMA direct mapping case, avoiding huge
retpoline overhead for high performance workloads
- merge the swiotlb dma_map_ops into dma-direct
- provide a generic remapping DMA consistent allocator for architectures
that have devices that perform DMA that is not cache coherent. Based
on the existing arm64 implementation and also used for csky now.
- improve the dma-debug infrastructure, including dynamic allocation
of entries (Robin Murphy)
- default to providing chaining scatterlist everywhere, with opt-outs
for the few architectures (alpha, parisc, most arm32 variants) that
can't cope with it
- misc sparc32 dma-related cleanups
- remove the dma_mark_clean arch hook used by swiotlb on ia64 and
replace it with the generic noncoherent infrastructure
- fix the return type of dma_set_max_seg_size (Niklas Söderlund)
- move the dummy dma ops for not DMA capable devices from arm64 to
common code (Robin Murphy)
- ensure dma_alloc_coherent returns zeroed memory to avoid kernel data
leaks through userspace. We already did this for most common
architectures, but this ensures we do it everywhere.
dma_zalloc_coherent has been deprecated and can hopefully be
removed after -rc1 with a coccinelle script.

----------------------------------------------------------------
Christoph Hellwig (60):
dma-direct: provide page based alloc/free helpers
dma-direct: reject highmem pages from dma_alloc_from_contiguous
dma-mapping: move the remap helpers to a separate file
dma-mapping: move the arm64 noncoherent alloc/free support to common code
dma-mapping: support highmem in the generic remap allocator
dma-remap: support DMA_ATTR_NO_KERNEL_MAPPING
csky: don't select DMA_NONCOHERENT_OPS
csky: don't use GFP_DMA in atomic_pool_init
csky: use the generic remapping dma alloc implementation
dma-mapping: provide a generic DMA_MAPPING_ERROR
dma-direct: remove the mapping_error dma_map_ops method
arm: remove the mapping_error dma_map_ops method
powerpc/iommu: remove the mapping_error dma_map_ops method
mips/jazz: remove the mapping_error dma_map_ops method
s390: remove the mapping_error dma_map_ops method
sparc: remove the mapping_error dma_map_ops method
parisc/ccio: remove the mapping_error dma_map_ops method
parisc/sba_iommu: remove the mapping_error dma_map_ops method
arm64: remove the dummy_dma_ops mapping_error method
alpha: remove the mapping_error dma_map_ops method
ia64/sba_iommu: improve internal map_page users
ia64/sba_iommu: remove the mapping_error dma_map_ops method
ia64/sn: remove the mapping_error dma_map_ops method
x86/amd_gart: remove the mapping_error dma_map_ops method
x86/calgary: remove the mapping_error dma_map_ops method
iommu: remove the mapping_error dma_map_ops method
iommu/intel: small map_page cleanup
iommu/vt-d: remove the mapping_error dma_map_ops method
iommu/dma-iommu: remove the mapping_error dma_map_ops method
xen-swiotlb: remove the mapping_error dma_map_ops method
dma-mapping: remove the mapping_error dma_map_ops method
dma-mapping: return an error code from dma_mapping_error
arch: switch the default on ARCH_HAS_SG_CHAIN
sparc: remove not needed sbus_dma_ops methods
sparc: factor the dma coherent mapping into helper
sparc: remove the sparc32_dma_ops indirection
sparc: remove not required includes from dma-mapping.h
sparc: move the leon PCI memory space comment to <asm/leon.h>
sparc: merge 32-bit and 64-bit version of pci.h
sparc: use DT node full_name in sparc_dma_alloc_resource
dma-mapping: remove a pointless memset in dma_atomic_pool_init
dma-mapping: simplify the dma_sync_single_range_for_{cpu,device} implementation
dma-mapping: merge dma_unmap_page_attrs and dma_unmap_single_attrs
dma-mapping: move dma_get_required_mask to kernel/dma
dma-mapping: move various slow path functions out of line
dma-mapping: move dma_cache_sync out of line
dma-mapping: always build the direct mapping code
swiotlb: remove SWIOTLB_MAP_ERROR
swiotlb: remove dma_mark_clean
dma-direct: improve addressability error reporting
dma-direct: use dma_direct_map_page to implement dma_direct_map_sg
dma-direct: merge swiotlb_dma_ops into the dma_direct code
vmd: use the proper dma_* APIs instead of direct methods calls
dma-mapping: bypass indirect calls for dma-direct
ia64: only select ARCH_HAS_DMA_COHERENT_TO_PFN if swiotlb is enabled
arm64: default to the direct mapping in get_arch_dma_ops
sparc/io-unit: fix ->map_sg return value
sparc/iommu: fix ->map_sg return value
dma-mapping: zero memory returned from dma_alloc_*
dma-mapping: deprecate dma_zalloc_coherent

Marek Szyprowski (1):
dma-mapping: fix lack of DMA address assignment in generic remap allocator

Nathan Chancellor (1):
PCI: Remove unused attr variable in pci_dma_configure

Robin Murphy (9):
dma-debug: Expose nr_total_entries in debugfs
dma-debug: Use pr_fmt()
dma-debug: Dynamically expand the dma_debug_entry pool
dma-debug: Make leak-like behaviour apparent
x86/dma/amd-gart: Stop resizing dma_debug_entry pool
dma/debug: Remove dma_debug_resize_entries()
dma-debug: Batch dma_debug_entry allocation
dma-mapping: factor out dummy DMA ops
ACPI / scan: Refactor _CCA enforcement

Thierry Reding (1):
dma-mapping: fix inverted logic in dma_supported

Documentation/DMA-API.txt | 29 +-
.../features/io/sg-chain/arch-support.txt | 33 --
Documentation/x86/x86_64/boot-options.txt | 5 +-
arch/alpha/Kconfig | 2 +-
arch/alpha/include/asm/dma-mapping.h | 2 +-
arch/alpha/kernel/pci_iommu.c | 16 +-
arch/arc/Kconfig | 2 -
arch/arc/mm/cache.c | 2 +-
arch/arc/mm/dma.c | 2 +-
arch/arm/Kconfig | 4 +-
arch/arm/common/dmabounce.c | 12 +-
arch/arm/include/asm/dma-iommu.h | 2 -
arch/arm/include/asm/dma-mapping.h | 2 +-
arch/arm/mm/dma-mapping-nommu.c | 14 +-
arch/arm/mm/dma-mapping.c | 39 +--
arch/arm64/Kconfig | 3 +-
arch/arm64/include/asm/dma-mapping.h | 8 +-
arch/arm64/mm/dma-mapping.c | 286 +----------------
arch/c6x/Kconfig | 1 -
arch/c6x/mm/dma-coherent.c | 5 +-
arch/csky/Kconfig | 3 +-
arch/csky/mm/dma-mapping.c | 142 +--------
arch/h8300/Kconfig | 1 -
arch/hexagon/Kconfig | 1 -
arch/ia64/Kconfig | 4 +-
arch/ia64/hp/common/hwsw_iommu.c | 2 +-
arch/ia64/hp/common/sba_iommu.c | 87 ++----
arch/ia64/kernel/dma-mapping.c | 21 +-
arch/ia64/mm/init.c | 19 +-
arch/ia64/sn/pci/pci_dma.c | 8 +-
arch/m68k/Kconfig | 1 -
arch/m68k/kernel/dma.c | 2 +-
arch/microblaze/Kconfig | 1 -
arch/microblaze/mm/consistent.c | 2 +-
arch/mips/Kconfig | 1 -
arch/mips/include/asm/dma-mapping.h | 4 +-
arch/mips/include/asm/jazzdma.h | 6 -
arch/mips/jazz/jazzdma.c | 16 +-
arch/nds32/Kconfig | 1 -
arch/nios2/Kconfig | 1 -
arch/openrisc/Kconfig | 1 -
arch/openrisc/kernel/dma.c | 2 +-
arch/parisc/Kconfig | 2 +-
arch/parisc/kernel/pci-dma.c | 4 +-
arch/parisc/kernel/setup.c | 4 -
arch/powerpc/Kconfig | 1 -
arch/powerpc/include/asm/dma-mapping.h | 1 -
arch/powerpc/include/asm/iommu.h | 4 -
arch/powerpc/kernel/dma-iommu.c | 6 -
arch/powerpc/kernel/dma-swiotlb.c | 17 +-
arch/powerpc/kernel/iommu.c | 28 +-
arch/powerpc/platforms/cell/iommu.c | 1 -
arch/powerpc/platforms/pseries/vio.c | 3 +-
arch/riscv/Kconfig | 1 -
arch/riscv/include/asm/dma-mapping.h | 15 -
arch/s390/Kconfig | 2 -
arch/s390/pci/pci_dma.c | 20 +-
arch/sh/Kconfig | 1 -
arch/sparc/Kconfig | 2 -
arch/sparc/include/asm/dma-mapping.h | 8 +-
arch/sparc/include/asm/dma.h | 48 +--
arch/sparc/include/asm/leon.h | 9 +
arch/sparc/include/asm/pci.h | 53 +++-
arch/sparc/include/asm/pci_32.h | 41 ---
arch/sparc/include/asm/pci_64.h | 52 ---
arch/sparc/kernel/iommu.c | 12 +-
arch/sparc/kernel/iommu_common.h | 2 -
arch/sparc/kernel/ioport.c | 243 +++------------
arch/sparc/kernel/pci_sun4v.c | 14 +-
arch/sparc/mm/io-unit.c | 80 +++--
arch/sparc/mm/iommu.c | 160 ++++++----
arch/unicore32/Kconfig | 1 -
arch/x86/Kconfig | 2 -
arch/x86/kernel/amd_gart_64.c | 63 +---
arch/x86/kernel/pci-calgary_64.c | 30 +-
arch/x86/kernel/pci-dma.c | 2 +-
arch/x86/kernel/pci-swiotlb.c | 4 +-
arch/x86/mm/mem_encrypt.c | 7 -
arch/x86/pci/sta2x11-fixup.c | 1 -
arch/xtensa/Kconfig | 3 +-
arch/xtensa/kernel/pci-dma.c | 2 +-
drivers/acpi/scan.c | 5 +
drivers/base/platform.c | 34 +-
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +-
drivers/iommu/amd_iommu.c | 31 +-
drivers/iommu/dma-iommu.c | 23 +-
drivers/iommu/intel-iommu.c | 26 +-
drivers/misc/mic/host/mic_boot.c | 2 +-
drivers/parisc/ccio-dma.c | 10 +-
drivers/parisc/sba_iommu.c | 10 +-
drivers/pci/controller/vmd.c | 48 +--
drivers/pci/pci-driver.c | 4 +-
drivers/xen/swiotlb-xen.c | 36 +--
include/asm-generic/dma-mapping.h | 2 +-
include/linux/dma-debug.h | 34 --
include/linux/dma-direct.h | 19 +-
include/linux/dma-iommu.h | 1 -
include/linux/dma-mapping.h | 347 +++++++++------------
include/linux/dma-noncoherent.h | 7 +-
include/linux/scatterlist.h | 6 +-
include/linux/swiotlb.h | 77 ++---
kernel/dma/Kconfig | 14 +-
kernel/dma/Makefile | 5 +-
kernel/dma/debug.c | 259 ++++++---------
kernel/dma/direct.c | 222 +++++++------
kernel/dma/dummy.c | 39 +++
kernel/dma/mapping.c | 223 +++++++++----
kernel/dma/remap.c | 256 +++++++++++++++
kernel/dma/swiotlb.c | 253 +--------------
kernel/dma/virt.c | 2 +-
lib/Kconfig | 2 +-
lib/scatterlist.c | 2 +-
112 files changed, 1407 insertions(+), 2338 deletions(-)
delete mode 100644 Documentation/features/io/sg-chain/arch-support.txt
delete mode 100644 arch/riscv/include/asm/dma-mapping.h
delete mode 100644 arch/sparc/include/asm/pci_32.h
delete mode 100644 arch/sparc/include/asm/pci_64.h
create mode 100644 kernel/dma/dummy.c
create mode 100644 kernel/dma/remap.c

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