From: Jason Gunthorpe <jgg@nvidia.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Justin Stitt <justinstitt@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Leon Romanovsky <leon@kernel.org>,
linux-rdma@vger.kernel.org, linux-s390@vger.kernel.org,
llvm@lists.linux.dev, Ingo Molnar <mingo@redhat.com>,
Bill Wendling <morbo@google.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
netdev@vger.kernel.org, Paolo Abeni <pabeni@redhat.com>,
Salil Mehta <salil.mehta@huawei.com>,
Sven Schnelle <svens@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Leon Romanovsky <leonro@mellanox.com>,
linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Mark Rutland <mark.rutland@arm.com>,
Michael Guralnik <michaelgur@mellanox.com>,
patches@lists.linux.dev, Niklas Schnelle <schnelle@linux.ibm.com>,
Jijie Shao <shaojijie@huawei.com>, Will Deacon <will@kernel.org>
Subject: [PATCH v3 2/6] s390: Implement __iowrite32_copy()
Date: Thu, 11 Apr 2024 13:46:15 -0300 [thread overview]
Message-ID: <2-v3-1893cd8b9369+1925-mlx5_arm_wc_jgg@nvidia.com> (raw)
In-Reply-To: <0-v3-1893cd8b9369+1925-mlx5_arm_wc_jgg@nvidia.com>
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
next prev parent reply other threads:[~2024-04-11 16:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-11 16:46 [PATCH v3 0/6] Fix mlx5 write combining support on new ARM64 cores Jason Gunthorpe
2024-04-11 16:46 ` [PATCH v3 1/6] x86: Stop using weak symbols for __iowrite32_copy() Jason Gunthorpe
2024-04-11 20:24 ` Arnd Bergmann
2024-04-11 16:46 ` Jason Gunthorpe [this message]
2024-04-11 16:46 ` [PATCH v3 3/6] s390: Stop using weak symbols for __iowrite64_copy() Jason Gunthorpe
2024-04-11 20:23 ` Arnd Bergmann
2024-04-11 16:46 ` [PATCH v3 4/6] arm64/io: Provide a WC friendly __iowriteXX_copy() Jason Gunthorpe
2024-04-11 16:46 ` [PATCH v3 5/6] net: hns3: Remove io_stop_wc() calls after __iowrite64_copy() Jason Gunthorpe
2024-04-11 16:46 ` [PATCH v3 6/6] IB/mlx5: Use __iowrite64_copy() for write combining stores Jason Gunthorpe
2024-04-16 8:29 ` Leon Romanovsky
2024-04-23 0:18 ` [PATCH v3 0/6] Fix mlx5 write combining support on new ARM64 cores Jason Gunthorpe
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