Check if we need to allocate uncached memory for a device given the
allocation flags. Switch over the uncached segment check to this helper
to deal with architectures that do not support the dma_cache_sync
operation and thus should not returned cacheable memory for
DMA_ATTR_NON_CONSISTENT
The arc DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but does
not provide a cache_sync operation. This means any user of it will
never be able to actually transfer cache ownership and thus cause
coherency bugs.
Signed-off-by: Christoph Hellwig
---
arch/arc/mm/dma.c | 21
Only call into arch_dma_alloc if we require an uncached mapping,
and remove the parisc code manually doing normal cached
DMA_ATTR_NON_CONSISTENT allocations.
Signed-off-by: Christoph Hellwig
---
arch/parisc/kernel/pci-dma.c | 48 ++--
kernel/dma/direct.c
The openrisc DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but
does not provide a cache_sync operation. This means any user of it
will never be able to actually transfer cache ownership and thus cause
coherency bugs.
Signed-off-by: Christoph Hellwig
---
arch/openrisc/kernel/dma.c | 22
DMA_ATTR_NO_KERNEL_MAPPING is generally implemented by allocating
normal cacheable pages or CMA memory, and then returning the page
pointer as the opaque handle. Lift that code from the xtensa and
generic dma remapping implementations into the generic dma-direct
code so that we don't even call
Replace the code that sets up uncached PTEs with the generic vmap based
remapping code. It also provides an atomic pool for allocations from
non-blocking context, which we not properly supported by the existing
arc code.
Signed-off-by: Christoph Hellwig
---
arch/arc/Kconfig | 2 ++
The arm-nommu DMA code supports DMA_ATTR_NON_CONSISTENT allocations, but
does not provide a cache_sync operation. This means any user of it
will never be able to actually transfer cache ownership and thus cause
coherency bugs.
Signed-off-by: Christoph Hellwig
---
Hi all,,
this series ensures that the common dma-direct code handles the somewhat
special allocation types requested by the DMA_ATTR_NON_CONSISTENT and
DMA_ATTR_NO_KERNEL_MAPPING flags directly. To do so it also removes three
partial and thus broken implementations of DMA_ATTR_NON_CONSISTENT.
Hi Christoph,
Regular question - do you have any public git repository with all this dma
changes?
I want to test it for ARC.
Pretty sure the
[PATCH 2/7] arc: remove the partial DMA_ATTR_NON_CONSISTENT support
is fine.
Not so sure about
[PATCH 7/7] arc: use the generic remapping allocator for
Implement jump label patching for ARC. Jump labels provide
an interface to generate dynamic branches using
self-modifying code.
This allows us to implement conditional branches where
changing branch direction is expensive but branch selection
is basically 'free'
This implementation uses 32-bit
From: Vineet Gupta
[ Upstream commit 89c92142f75eb80064f5b9f484b1b4d81790 ]
| arch/arc/mm/tlb.c:914:2: warning: variable length array 'pd0' is used [-Wvla]
| arch/arc/include/asm/cmpxchg.h:95:29: warning: value computed is not used
[-Wunused-value]
Signed-off-by: Vineet Gupta
From: Jose Abreu
[ Upstream commit ecc906a11c2a0940e1a380debd8bd5bc09faf454 ]
GMAC controller on HSDK boards supports 256 Hash Table size so we need to
add the multicast filter bins property. This allows for the Hash filter
to work properly using stmmac driver.
Cc: Joao Pinto
Cc: Rob Herring
From: Jose Abreu
[ Upstream commit ecc906a11c2a0940e1a380debd8bd5bc09faf454 ]
GMAC controller on HSDK boards supports 256 Hash Table size so we need to
add the multicast filter bins property. This allows for the Hash filter
to work properly using stmmac driver.
Cc: Joao Pinto
Cc: Rob Herring
From: Vineet Gupta
[ Upstream commit 89c92142f75eb80064f5b9f484b1b4d81790 ]
| arch/arc/mm/tlb.c:914:2: warning: variable length array 'pd0' is used [-Wvla]
| arch/arc/include/asm/cmpxchg.h:95:29: warning: value computed is not used
[-Wunused-value]
Signed-off-by: Vineet Gupta
From: Jose Abreu
[ Upstream commit 4c70850aeb2e40016722cd1abd43c679666d3ca0 ]
Add the binding for RX/TX fifo size of GMAC node.
Cc: Joao Pinto
Cc: Rob Herring
Cc: Mark Rutland
Cc: Vineet Gupta
Tested-by: Eugeniy Paltsev
Acked-by: Alexey Brodkin
Signed-off-by: Jose Abreu
Signed-off-by:
From: Vineet Gupta
[ Upstream commit 89c92142f75eb80064f5b9f484b1b4d81790 ]
| arch/arc/mm/tlb.c:914:2: warning: variable length array 'pd0' is used [-Wvla]
| arch/arc/include/asm/cmpxchg.h:95:29: warning: value computed is not used
[-Wunused-value]
Signed-off-by: Vineet Gupta
From: Vineet Gupta
[ Upstream commit 4c6fabda1ad1dec6d274c098ef0a91809c74f2e3 ]
| CC lib/nmi_backtrace.o
| In file included from ../include/linux/kprobes.h:43:0,
| from ../lib/nmi_backtrace.c:17:
| ../arch/arc/include/asm/kprobes.h:57:13: warning: 'trap_is_kprobe'
From: Jose Abreu
[ Upstream commit 4c70850aeb2e40016722cd1abd43c679666d3ca0 ]
Add the binding for RX/TX fifo size of GMAC node.
Cc: Joao Pinto
Cc: Rob Herring
Cc: Mark Rutland
Cc: Vineet Gupta
Tested-by: Eugeniy Paltsev
Acked-by: Alexey Brodkin
Signed-off-by: Jose Abreu
Signed-off-by:
From: Jose Abreu
[ Upstream commit ecc906a11c2a0940e1a380debd8bd5bc09faf454 ]
GMAC controller on HSDK boards supports 256 Hash Table size so we need to
add the multicast filter bins property. This allows for the Hash filter
to work properly using stmmac driver.
Cc: Joao Pinto
Cc: Rob Herring
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