Date: Fri, 9 Sep 2022 15:00:28 GMT From: Felix Palmen <zirias@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 600f16129510 - main - linuxkpi: Add non-atomic readq()/writeq() Message-ID: <202209091500.289F0SY9079464@gitrepo.freebsd.org>
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The branch main has been updated by zirias (ports committer): URL: https://cgit.FreeBSD.org/src/commit/?id=600f161295107d4d26f9a0551fc8160ee9dd0dd5 commit 600f161295107d4d26f9a0551fc8160ee9dd0dd5 Author: Felix Palmen <zirias@FreeBSD.org> AuthorDate: 2022-09-09 14:01:22 +0000 Commit: Felix Palmen <zirias@FreeBSD.org> CommitDate: 2022-09-09 14:59:41 +0000 linuxkpi: Add non-atomic readq()/writeq() The non-atomic versions are required by drm-510-kmod to build on 32-bit architectures. Approved by: hselasky, manu, tcberner (mentor) Differential Revision: https://reviews.freebsd.org/D36507 --- .../common/include/linux/io-64-nonatomic-lo-hi.h | 65 ++++++++++++++++++++++ .../dummy/include/linux/io-64-nonatomic-lo-hi.h | 0 2 files changed, 65 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/io-64-nonatomic-lo-hi.h b/sys/compat/linuxkpi/common/include/linux/io-64-nonatomic-lo-hi.h new file mode 100644 index 000000000000..c9cf0befec79 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/io-64-nonatomic-lo-hi.h @@ -0,0 +1,65 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 2022 Felix Palmen + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#ifndef _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_ +#define _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_ + +#include <linux/io.h> + +static inline uint64_t +lo_hi_readq(const volatile void *addr) +{ + const volatile uint32_t *p = addr; + uint32_t l, h; + + __io_br(); + l = le32toh(__raw_readl(p)); + h = le32toh(__raw_readl(p + 1)); + __io_ar(); + + return (l + ((uint64_t)h << 32)); +} + +static inline void +lo_hi_writeq(uint64_t v, volatile void *addr) +{ + volatile uint32_t *p = addr; + + __io_bw(); + __raw_writel(htole32(v), p); + __raw_writel(htole32(v >> 32), p + 1); + __io_aw(); +} + +#ifndef readq +#define readq(addr) lo_hi_readq(addr) +#endif + +#ifndef writeq +#define writeq(v, addr) lo_hi_writeq(v, addr) +#endif + +#endif /* _LINUXKPI_LINUX_IO_64_NONATOMIC_LO_HI_H_ */ diff --git a/sys/compat/linuxkpi/dummy/include/linux/io-64-nonatomic-lo-hi.h b/sys/compat/linuxkpi/dummy/include/linux/io-64-nonatomic-lo-hi.h deleted file mode 100644 index e69de29bb2d1..000000000000
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