From nobody Sun Apr 13 10:00:56 2025 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Zb5XT21r3z5t3K5; Sun, 13 Apr 2025 10:00:57 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R10" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Zb5XS5r8Pz46ZH; Sun, 13 Apr 2025 10:00:56 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1744538456; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Z/AHFPTaWO0Ny7j02MzORaba7auVZuhu+tReHBZZfKU=; b=Cc81WmgQuTh6YBdGZYxvaohCEsgbHQ2gW00s20YVSWQARaThIHDLruZsr5j8IwxLcPkz42 q+7ktomGUHIZZV+L2vRGxcFAe9wgIpx9qRKN3iop4SmoUuqVJWCcQZiAWVbKaGAVXbSPa9 jV5PcYG56M4xjkOJ6yac9xp/6UPe6LE+hYBmrKaP+v2gW2Wm3tA9PvugX1jZbW0hkhjEbd VOkOVvZyQA4qhvhkU5l488LeHm8hGoE86kwjjhvcGBz+4bvdFDN18O/3dqDe+Wd+K8bO/q kar/IdShnhS1FNfBDJ1JxtC55WAtPb/T088DMHWCkIKXTMxizEN2LbwG2RzrmA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1744538456; a=rsa-sha256; cv=none; b=RsCps4a7HlLkQVakdM0vO9ylnuYZKoJcVZLDtcmJiCZL7BjT0UgWWcZsGiF+4tSutpBstH /MFno6iONfA5Txq1jHJdyHNfVXZQJ6Xyk11u8xQFJ8GKxNeRp7oXn3adj9iqhHDowU0y7M Y59o0xlh6B3uedUESLX/2v0ikawWj86tdA5EhG8in8tWfYFsXLaoNk9S5dna+9p2rBqz16 XmqfBzb29PUie9hH6Y76O1shIL60JEq/xOsVv7GiDggXekJc9OxZ8GJ2RF1XRd+x/Q978s H5eaQcR8mMpQLw1jET9TFTTM+bwUTFPp6AmRcrcfSrVQKcQjQfmjFkZO4QTFSQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1744538456; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Z/AHFPTaWO0Ny7j02MzORaba7auVZuhu+tReHBZZfKU=; b=tznvj6UFbZ1xmCcCia2OcuCGOSFBJAb9r1qxeFtgXE+9QbuztCy4CuPiCNi9uBkv4HSWoI ZvsJIHhkeW0Q+bOKKFsA6nkgBdFj5gt1YO6N948dwZCMB+B3W1sEYeo50tXu/tAT69PlTX pm490WodELwJgV9ROfaLuT9JVNfPmOHaiC2I2hlE1a+KzNEcOUKWHdjzWW8fHVr9gyvwrx d/f6uVX5d7GHEyAAi7XEN+oTvZcQzN/1j6iuik1NF2UewvC1UoOUBQXZjdKCx/+3I20oye NZQcCoyPx8Bq4Vvhoqzk1ztGgEVgV85W7GBj4r0pl4U6znRLlpKkMjfR7O7RgA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4Zb5XS5CNnzxpX; Sun, 13 Apr 2025 10:00:56 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.18.1/8.18.1) with ESMTP id 53DA0uWi083958; Sun, 13 Apr 2025 10:00:56 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.18.1/8.18.1/Submit) id 53DA0uPJ083955; Sun, 13 Apr 2025 10:00:56 GMT (envelope-from git) Date: Sun, 13 Apr 2025 10:00:56 GMT Message-Id: <202504131000.53DA0uPJ083955@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: =?utf-8?Q?Jean-S=C3=A9bastien?= =?utf-8?Q?P=C3=A9dron?= Subject: git: d9a2c2e250ae - main - linuxkpi: Add `memcpy_{from,to}_page()` List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: dumbbell X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: d9a2c2e250ae561fc2ff6c12dda53f70fb8c76b6 Auto-Submitted: auto-generated The branch main has been updated by dumbbell: URL: https://cgit.FreeBSD.org/src/commit/?id=d9a2c2e250ae561fc2ff6c12dda53f70fb8c76b6 commit d9a2c2e250ae561fc2ff6c12dda53f70fb8c76b6 Author: Jean-Sébastien Pédron AuthorDate: 2025-02-28 23:25:29 +0000 Commit: Jean-Sébastien Pédron CommitDate: 2025-04-13 09:50:42 +0000 linuxkpi: Add `memcpy_{from,to}_page()` The i915 DRM driver started to use it in Linux 6.8. Reviewed by: bz Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D49384 --- sys/compat/linuxkpi/common/include/linux/highmem.h | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/highmem.h b/sys/compat/linuxkpi/common/include/linux/highmem.h index b8874481f9c6..8b5255c1869c 100644 --- a/sys/compat/linuxkpi/common/include/linux/highmem.h +++ b/sys/compat/linuxkpi/common/include/linux/highmem.h @@ -139,4 +139,34 @@ kunmap_local(void *addr) kunmap_atomic(addr); } +static inline void +memcpy_from_page(char *to, struct page *page, size_t offset, size_t len) +{ + char *from; + + KASSERT(offset + len <= PAGE_SIZE, + ("%s: memcpy from page %p to address %p: " + "offset+len (%zu+%zu) would go beyond page end", + __func__, page, to, offset, len)); + + from = kmap_local_page(page); + memcpy(to, from + offset, len); + kunmap_local(from); +} + +static inline void +memcpy_to_page(struct page *page, size_t offset, const char *from, size_t len) +{ + char *to; + + KASSERT(offset + len <= PAGE_SIZE, + ("%s: memcpy from address %p to page %p: " + "offset+len (%zu+%zu) would go beyond page end", + __func__, from, page, offset, len)); + + to = kmap_local_page(page); + memcpy(to + offset, from, len); + kunmap_local(to); +} + #endif /* _LINUXKPI_LINUX_HIGHMEM_H_ */