[PATCH 2/6] s390: Implement __iowrite32_copy()
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2024-02-21 01:17:52
Also in:
linux-arch, linux-patches, linux-rdma, linux-s390, llvm, netdev
Subsystem:
s390 architecture, the rest · Maintainers:
Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Linus Torvalds
It is trivial to implement an inline to do this, so provide it in the s390 headers. Like the 64 bit version it should just invoke zpci_memcpy_toio() with the correct size. Acked-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> --- arch/s390/include/asm/io.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 4453ad7c11aced..00704fc8a54b30 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h@@ -73,6 +73,14 @@ static inline void ioport_unmap(void __iomem *p) #define __raw_writel zpci_write_u32 #define __raw_writeq zpci_write_u64 +/* combine single writes by using store-block insn */ +static inline void __iowrite32_copy(void __iomem *to, const void *from, + size_t count) +{ + zpci_memcpy_toio(to, from, count * 4); +} +#define __iowrite32_copy __iowrite32_copy + #endif /* CONFIG_PCI */ #include <asm-generic/io.h>
--
2.43.2
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