From: Logan Gunthorpe Subject: [PATCH v4 5/5] crypto: caam: cleanup CONFIG_64BIT ifdefs when using io{read|write}64 Date: Tue, 18 Jul 2017 10:55:28 -0600 Message-ID: <20170718165528.7383-6-logang@deltatee.com> References: <20170718165528.7383-1-logang@deltatee.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Arnd Bergmann , Greg Kroah-Hartman , =?UTF-8?q?Horia=20Geant=C4=83?= , Stephen Bates , Logan Gunthorpe , Dan Douglass , Herbert Xu , "David S. Miller" To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-ntb@googlegroups.com, linux-crypto@vger.kernel.org Return-path: In-Reply-To: <20170718165528.7383-1-logang@deltatee.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org From: Horia Geantă We can now make use of the io-64-nonatomic-lo-hi header to always provide 64 bit IO operations. So this patch cleans up the extra CONFIG_64BIT ifdefs. To be consistent with CAAM engine HW spec: in case of 64-bit registers, irrespective of device endianness, the lower address should be read from / written to first, followed by the upper address. Indeed the I/O accessors in CAAM driver currently don't follow the spec, however this is a good opportunity to fix the code. Signed-off-by: Horia Geantă Signed-off-by: Logan Gunthorpe Cc: Horia Geantă Cc: Dan Douglass Cc: Herbert Xu Cc: "David S. Miller" --- drivers/crypto/caam/regs.h | 35 +++++------------------------------ 1 file changed, 5 insertions(+), 30 deletions(-) diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h index 84d2f838a063..0c45505458e7 100644 --- a/drivers/crypto/caam/regs.h +++ b/drivers/crypto/caam/regs.h @@ -9,7 +9,7 @@ #include #include -#include +#include /* * Architecture-specific register access methods @@ -134,50 +134,25 @@ static inline void clrsetbits_32(void __iomem *reg, u32 clear, u32 set) * base + 0x0000 : least-significant 32 bits * base + 0x0004 : most-significant 32 bits */ -#ifdef CONFIG_64BIT static inline void wr_reg64(void __iomem *reg, u64 data) { +#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX if (caam_little_end) iowrite64(data, reg); else - iowrite64be(data, reg); -} - -static inline u64 rd_reg64(void __iomem *reg) -{ - if (caam_little_end) - return ioread64(reg); - else - return ioread64be(reg); -} - -#else /* CONFIG_64BIT */ -static inline void wr_reg64(void __iomem *reg, u64 data) -{ -#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX - if (caam_little_end) { - wr_reg32((u32 __iomem *)(reg) + 1, data >> 32); - wr_reg32((u32 __iomem *)(reg), data); - } else #endif - { - wr_reg32((u32 __iomem *)(reg), data >> 32); - wr_reg32((u32 __iomem *)(reg) + 1, data); - } + iowrite64be(data, reg); } static inline u64 rd_reg64(void __iomem *reg) { #ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX if (caam_little_end) - return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 | - (u64)rd_reg32((u32 __iomem *)(reg))); + return ioread64(reg); else #endif - return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 | - (u64)rd_reg32((u32 __iomem *)(reg) + 1)); + return ioread64be(reg); } -#endif /* CONFIG_64BIT */ #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT #ifdef CONFIG_SOC_IMX7D -- 2.11.0