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Adrian Larumbe 3218910fd5 dmaengine: Add core function and capability check for DMA_MEMCPY_SG 
This is the old DMA_SG interface that was removed in commit
c678fa6634 ("dmaengine: remove DMA_SG as it is dead code in kernel"). It
has been renamed to DMA_MEMCPY_SG to better match the MEMSET and MEMSET_SG
naming convention.

It should only be used for mem2mem copies, either main system memory or
CPU-addressable device memory (like video memory on a PCI graphics card).

Bringing back this interface was prompted by the need to use the Xilinx
CDMA device for mem2mem SG transfers.

Signed-off-by: Adrian Larumbe <adrianml@alumnos.upm.es>
Link: https://lore.kernel.org/r/20211101180825.241048-3-adrianml@alumnos.upm.es
Signed-off-by: Vinod Koul <vkoul@kernel.org>
 		2021-11-22 11:38:05 +05:30
..
acpi Merge branches 'acpica', 'acpi-ec', 'acpi-pmic' and 'acpi-video' 2021-11-10 14:03:14 +01:00
asm-generic asm-generic: asm/syscall.h cleanup 2021-11-10 11:22:03 -08:00
clocksource ARM: 2021-11-02 11:24:14 -07:00
crypto
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drm Removed the TTM Huge Page functionnality to address a crash, a timeout 2021-11-11 08:14:19 +10:00
dt-bindings dt-bindings: Rename Ingenic CGU headers to ingenic,*.h 2021-11-11 22:27:14 -06:00
keys
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kunit include/kunit/test.h: replace kernel.h with the necessary inclusions 2021-11-09 10:02:49 -08:00
kvm
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linux dmaengine: Add core function and capability check for DMA_MEMCPY_SG 2021-11-22 11:38:05 +05:30
math-emu
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media Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
memory
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misc
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net Networking fixes for 5.16-rc1, including fixes from bpf, can 2021-11-11 09:49:36 -08:00
pcmcia
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ras
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rdma
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scsi SCSI misc on 20211112 2021-11-12 12:25:50 -08:00
soc ARM: SoC drivers for 5.16 2021-11-03 17:00:52 -07:00
sound Revert "ALSA: memalloc: Convert x86 SG-buffer handling with non-contiguous type" 2021-11-04 22:10:03 +01:00
target
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trace f2fs-for-5.16-rc1 2021-11-13 11:20:22 -08:00
uapi virtio-mem: support VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE 2021-11-13 13:14:05 -08:00
vdso
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video
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xen xen/balloon: rename alloc/free_xenballooned_pages 2021-11-04 12:59:44 -05:00