From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 32544C2BA4C for ; Wed, 26 Jan 2022 20:36:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1920910E804; Wed, 26 Jan 2022 20:36:28 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id E17FB10E705; Wed, 26 Jan 2022 20:36:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643229386; x=1674765386; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=N1JcWJhtFV0j9BhbtynUEaZW700UjalgFcxpWKXF3gk=; b=M/n68IcXFJMqbNUUrmJHpqaOSz2QPfnexO1p2vlpmNYR9/cDy9A5XQUV X6/1IdXW+QY4oXyOfdhg0VhmSCBO25iCNsB8yLUBPQo8VY0NB7a4nSNcE ycM5RYEtXgzfqHylXt2irsNFFWYAk8WF7Av3QMXQvDHLDLDwoWJ7eLLvw +HpyDrt0zkRECrlVruUlLrm3gN8fya4BsRvu4ps6InDmkljLGv/1D0cMY oNfUCPTGVyim+NYv+YuOcVncd/ugVTEErJn4wkUbayf5qeJq2N6WNA8Jj JUoqIHg/XXCnkMaUUyYUlSk3Tfc5/AF/w9r7PednvXrjtDdQcD7/cb2aW w==; X-IronPort-AV: E=McAfee;i="6200,9189,10239"; a="333000496" X-IronPort-AV: E=Sophos;i="5.88,319,1635231600"; d="scan'208";a="333000496" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2022 12:36:22 -0800 X-IronPort-AV: E=Sophos;i="5.88,319,1635231600"; d="scan'208";a="581221497" Received: from lucas-s2600cw.jf.intel.com ([10.165.21.202]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jan 2022 12:36:22 -0800 From: Lucas De Marchi To: intel-gfx@lists.freedesktop.org Subject: [PATCH 03/19] drm/i915/gt: Add helper for shmem copy to dma_buf_map Date: Wed, 26 Jan 2022 12:36:46 -0800 Message-Id: <20220126203702.1784589-4-lucas.demarchi@intel.com> X-Mailer: git-send-email 2.35.0 In-Reply-To: <20220126203702.1784589-1-lucas.demarchi@intel.com> References: <20220126203702.1784589-1-lucas.demarchi@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tvrtko Ursulin , =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , David Airlie , dri-devel@lists.freedesktop.org, Matthew Auld Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a variant of shmem_read() that takes a dma_buf_map pointer rather than a plain pointer as argument. It's mostly a copy __shmem_rw() but adapting the api and removing the write support since there's currently only need to use dma_buf_map as destination. Reworking __shmem_rw() to share the implementation was tempting, but finding a good balance between reuse and clarity pushed towards a little code duplication. Since the function is small, just add the similar function with a copy/paste/adapt approach. Cc: Matt Roper Cc: Joonas Lahtinen Cc: Tvrtko Ursulin Cc: David Airlie Cc: Daniel Vetter Cc: Matthew Auld Cc: Thomas Hellström Cc: Maarten Lankhorst Signed-off-by: Lucas De Marchi --- drivers/gpu/drm/i915/gt/shmem_utils.c | 32 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/gt/shmem_utils.h | 3 +++ 2 files changed, 35 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c index 0683b27a3890..d7968e68ccfb 100644 --- a/drivers/gpu/drm/i915/gt/shmem_utils.c +++ b/drivers/gpu/drm/i915/gt/shmem_utils.c @@ -3,6 +3,7 @@ * Copyright © 2020 Intel Corporation */ +#include #include #include #include @@ -123,6 +124,37 @@ static int __shmem_rw(struct file *file, loff_t off, return 0; } +int shmem_read_to_dma_buf_map(struct file *file, loff_t off, + struct dma_buf_map *map, size_t len) +{ + struct dma_buf_map map_iter = *map; + unsigned long pfn; + + for (pfn = off >> PAGE_SHIFT; len; pfn++) { + unsigned int this = + min_t(size_t, PAGE_SIZE - offset_in_page(off), len); + struct page *page; + void *vaddr; + + page = shmem_read_mapping_page_gfp(file->f_mapping, pfn, + GFP_KERNEL); + if (IS_ERR(page)) + return PTR_ERR(page); + + vaddr = kmap(page); + dma_buf_map_memcpy_to(&map_iter, vaddr + offset_in_page(off), this); + mark_page_accessed(page); + kunmap(page); + put_page(page); + + len -= this; + dma_buf_map_incr(&map_iter, this); + off = 0; + } + + return 0; +} + int shmem_read(struct file *file, loff_t off, void *dst, size_t len) { return __shmem_rw(file, off, dst, len, false); diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.h b/drivers/gpu/drm/i915/gt/shmem_utils.h index c1669170c351..a3d4ce966f74 100644 --- a/drivers/gpu/drm/i915/gt/shmem_utils.h +++ b/drivers/gpu/drm/i915/gt/shmem_utils.h @@ -8,6 +8,7 @@ #include +struct dma_buf_map; struct drm_i915_gem_object; struct file; @@ -17,6 +18,8 @@ struct file *shmem_create_from_object(struct drm_i915_gem_object *obj); void *shmem_pin_map(struct file *file); void shmem_unpin_map(struct file *file, void *ptr); +int shmem_read_to_dma_buf_map(struct file *file, loff_t off, + struct dma_buf_map *map, size_t len); int shmem_read(struct file *file, loff_t off, void *dst, size_t len); int shmem_write(struct file *file, loff_t off, void *src, size_t len); -- 2.35.0