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 X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F046C433EF for ; Thu, 16 Sep 2021 11:30:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39EF961354 for ; Thu, 16 Sep 2021 11:30:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237989AbhIPLcO (ORCPT ); Thu, 16 Sep 2021 07:32:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238088AbhIPLcL (ORCPT ); Thu, 16 Sep 2021 07:32:11 -0400 Received: from mail-wr1-x42d.google.com (mail-wr1-x42d.google.com [IPv6:2a00:1450:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6BF7C061574 for ; Thu, 16 Sep 2021 04:30:50 -0700 (PDT) Received: by mail-wr1-x42d.google.com with SMTP id q26so8904910wrc.7 for ; Thu, 16 Sep 2021 04:30:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qtmlO413yj3/X7KD0lHveLpvVJwGO76Kiide216asC4=; b=pBH9OW9RXHjAXv6756IYEn28oYG9StlbNwM4l8uaixqrDE8n2tTBfuMXTw6P0KZMvQ eOw0F4dUF2zZAKmn2aYLLH0CYMxzQGYed2pTA0kMkeo3FM8beKwukv7TjLbet9J1CdAw 2HXke1Wx2fJmsv+fDics2PRLJogFhjzLbLzuO6LZttwFmb8zrti5Tl2Oeul/5RpeLksM FwEaLm3vxzHtSP/SFp0q6Xz3cNhcpfcr8psgkCvp4bgQSYE2yiQ+2lKyzwjjKr4hGHMT dRFbHMhvoLgBzVi581snZwmQyp2uKIZZhOK3uLqPqNTI/uw0G19L/C2+fWFYTPAI/V3Y ofCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qtmlO413yj3/X7KD0lHveLpvVJwGO76Kiide216asC4=; b=ChW1b8pI+oYr1Nb+4QYpNwY43puRnVRwZ2wWOmE2YoEdKBpjcpDupVoYi7P9BqS3rv jM3sgewwrG6f/+maJToouITw14UIoRrDG2qVmzrYFGRpw3xpRI9k0mqCi/DVTfnnpoS9 TmoURuGab+CJMmRJ7t3htWcNCye/9mvhL3gVlMmL9a3Vye0geTUbV/aoBUKk1JT8GGFe YLuf5Rbkn20EUp3xesTRwuf5WzoPNA6WxcU4HxSDnog6JNAIJb8sBF3LGJODLLmfGnPX JXexx3sqGg3sj7Pel+g3SZau9vrpcARFu7LFJPPLxUE8ZzTivWzsG+TD1pVvpvxK6/sl 0gaw== X-Gm-Message-State: AOAM531rtkU+aikM4K2j8RnOUldJp1zPhDC4Ekrm2jt06DGh44gy2a1y PdDR2qYkweouNlM4+IhgcD4= X-Google-Smtp-Source: ABdhPJwU8W3gDpAkB3c368BsKqC/kHLjObVUyyjtU7xQoZmk2Om8w1eCgx0uwrMipzh+WwdrHD/ESg== X-Received: by 2002:adf:e6c9:: with SMTP id y9mr5581411wrm.430.1631791849534; Thu, 16 Sep 2021 04:30:49 -0700 (PDT) Received: from abel.fritz.box (p5b0ea1b5.dip0.t-ipconnect.de. [91.14.161.181]) by smtp.gmail.com with ESMTPSA id c17sm3803674wrn.54.2021.09.16.04.30.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Sep 2021 04:30:49 -0700 (PDT) From: "=?UTF-8?q?Christian=20K=C3=B6nig?=" X-Google-Original-From: =?UTF-8?q?Christian=20K=C3=B6nig?= To: linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org Cc: daniel@ffwll.ch, tvrtko.ursulin@linux.intel.com Subject: [PATCH 04/26] dma-buf: use new iterator in dma_resv_get_fences v2 Date: Thu, 16 Sep 2021 13:30:20 +0200 Message-Id: <20210916113042.3631-5-christian.koenig@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210916113042.3631-1-christian.koenig@amd.com> References: <20210916113042.3631-1-christian.koenig@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This makes the function much simpler since the complex retry logic is now handled elsewhere. v2: use sizeof(void*) instead Signed-off-by: Christian König --- drivers/dma-buf/dma-resv.c | 110 +++++++++++++------------------------ 1 file changed, 37 insertions(+), 73 deletions(-) diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 91c040cb7d63..bba328475304 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -491,99 +491,63 @@ EXPORT_SYMBOL(dma_resv_copy_fences); * dma_resv_get_fences - Get an object's shared and exclusive * fences without update side lock held * @obj: the reservation object - * @pfence_excl: the returned exclusive fence (or NULL) - * @pshared_count: the number of shared fences returned - * @pshared: the array of shared fence ptrs returned (array is krealloc'd to + * @fence_excl: the returned exclusive fence (or NULL) + * @shared_count: the number of shared fences returned + * @shared: the array of shared fence ptrs returned (array is krealloc'd to * the required size, and must be freed by caller) * * Retrieve all fences from the reservation object. If the pointer for the * exclusive fence is not specified the fence is put into the array of the * shared fences as well. Returns either zero or -ENOMEM. */ -int dma_resv_get_fences(struct dma_resv *obj, struct dma_fence **pfence_excl, - unsigned int *pshared_count, - struct dma_fence ***pshared) +int dma_resv_get_fences(struct dma_resv *obj, struct dma_fence **fence_excl, + unsigned int *shared_count, struct dma_fence ***shared) { - struct dma_fence **shared = NULL; - struct dma_fence *fence_excl; - unsigned int shared_count; - int ret = 1; - - do { - struct dma_resv_list *fobj; - unsigned int i, seq; - size_t sz = 0; - - shared_count = i = 0; - - rcu_read_lock(); - seq = read_seqcount_begin(&obj->seq); - - fence_excl = dma_resv_excl_fence(obj); - if (fence_excl && !dma_fence_get_rcu(fence_excl)) - goto unlock; + struct dma_resv_iter cursor; + struct dma_fence *fence; - fobj = dma_resv_shared_list(obj); - if (fobj) - sz += sizeof(*shared) * fobj->shared_max; + *shared_count = 0; + *shared = NULL; - if (!pfence_excl && fence_excl) - sz += sizeof(*shared); + if (fence_excl) + *fence_excl = NULL; - if (sz) { - struct dma_fence **nshared; + rcu_read_lock(); + dma_resv_for_each_fence_unlocked(obj, &cursor, true, fence) { - nshared = krealloc(shared, sz, - GFP_NOWAIT | __GFP_NOWARN); - if (!nshared) { - rcu_read_unlock(); + if (cursor.is_first) { + unsigned int count; - dma_fence_put(fence_excl); - fence_excl = NULL; + while (*shared_count) + dma_fence_put((*shared)[--(*shared_count)]); - nshared = krealloc(shared, sz, GFP_KERNEL); - if (nshared) { - shared = nshared; - continue; - } + if (fence_excl) + dma_fence_put(*fence_excl); - ret = -ENOMEM; - break; - } - shared = nshared; - shared_count = fobj ? fobj->shared_count : 0; - for (i = 0; i < shared_count; ++i) { - shared[i] = rcu_dereference(fobj->shared[i]); - if (!dma_fence_get_rcu(shared[i])) - break; - } - } + count = cursor.fences ? cursor.fences->shared_count : 0; + count += fence_excl ? 0 : 1; + rcu_read_unlock(); - if (i != shared_count || read_seqcount_retry(&obj->seq, seq)) { - while (i--) - dma_fence_put(shared[i]); - dma_fence_put(fence_excl); - goto unlock; + /* Eventually re-allocate the array */ + *shared = krealloc_array(*shared, count, + sizeof(void *), + GFP_KERNEL); + if (count && !*shared) + return -ENOMEM; + rcu_read_lock(); } - ret = 0; -unlock: - rcu_read_unlock(); - } while (ret); - - if (pfence_excl) - *pfence_excl = fence_excl; - else if (fence_excl) - shared[shared_count++] = fence_excl; + if (dma_resv_iter_is_exclusive(&cursor) && fence_excl) + *fence_excl = fence; + else + (*shared)[(*shared_count)++] = fence; - if (!shared_count) { - kfree(shared); - shared = NULL; + /* Don't drop the reference */ + fence = NULL; } + rcu_read_unlock(); - *pshared_count = shared_count; - *pshared = shared; - return ret; + return 0; } EXPORT_SYMBOL_GPL(dma_resv_get_fences); -- 2.25.1 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 X-Spam-Level: X-Spam-Status: No, score=-13.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7063CC4332F for ; Thu, 16 Sep 2021 12:00:33 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3C1996128A for ; Thu, 16 Sep 2021 12:00:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 3C1996128A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 530866ED7D; Thu, 16 Sep 2021 12:00:20 +0000 (UTC) Received: from mail-wr1-x42a.google.com (mail-wr1-x42a.google.com [IPv6:2a00:1450:4864:20::42a]) by gabe.freedesktop.org (Postfix) with ESMTPS id F07426ECE7; Thu, 16 Sep 2021 11:30:50 +0000 (UTC) Received: by mail-wr1-x42a.google.com with SMTP id q11so8912165wrr.9; Thu, 16 Sep 2021 04:30:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qtmlO413yj3/X7KD0lHveLpvVJwGO76Kiide216asC4=; b=pBH9OW9RXHjAXv6756IYEn28oYG9StlbNwM4l8uaixqrDE8n2tTBfuMXTw6P0KZMvQ eOw0F4dUF2zZAKmn2aYLLH0CYMxzQGYed2pTA0kMkeo3FM8beKwukv7TjLbet9J1CdAw 2HXke1Wx2fJmsv+fDics2PRLJogFhjzLbLzuO6LZttwFmb8zrti5Tl2Oeul/5RpeLksM FwEaLm3vxzHtSP/SFp0q6Xz3cNhcpfcr8psgkCvp4bgQSYE2yiQ+2lKyzwjjKr4hGHMT dRFbHMhvoLgBzVi581snZwmQyp2uKIZZhOK3uLqPqNTI/uw0G19L/C2+fWFYTPAI/V3Y ofCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qtmlO413yj3/X7KD0lHveLpvVJwGO76Kiide216asC4=; b=v2gcPgjzkxsqbqbzxYf0o68eSHMzSPU8N7wfvQTToprDCRrmG0kCugyprhRhdBcm3V FX3h9OXYj7L2w8NUyhEA1hdNr/Ni3U4e16Opwrvri4zWlKlSP5groqhPkK2FecYFODbM A683QK2IYBlntLag9Lq87bD6ffUS6prDBT8S3lF3euq+al8EC3VoQJoh60FFSc/P79WR qBxZr919MEEoB9bOhjgKFkSgUBNAKRig44BdBFJa38yz2u56MmexVgFEUM2spD7NVudS YEmtjSVb3jJfJvfPXgIA+nswTbh4UWLu2ZfrbXbdBtGM4J7KkCvXNFDUIQFrGHIfwdAh 5PQw== X-Gm-Message-State: AOAM531EHG/hM+aQmEDGT8g21/Ie6JX6rGUFHrrB2yvJrCXn9UJHhspa GSos3Zj3KCGXc6v+sXWM94wuE5Xi6ShwvtZH X-Google-Smtp-Source: ABdhPJwU8W3gDpAkB3c368BsKqC/kHLjObVUyyjtU7xQoZmk2Om8w1eCgx0uwrMipzh+WwdrHD/ESg== X-Received: by 2002:adf:e6c9:: with SMTP id y9mr5581411wrm.430.1631791849534; Thu, 16 Sep 2021 04:30:49 -0700 (PDT) Received: from abel.fritz.box (p5b0ea1b5.dip0.t-ipconnect.de. [91.14.161.181]) by smtp.gmail.com with ESMTPSA id c17sm3803674wrn.54.2021.09.16.04.30.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Sep 2021 04:30:49 -0700 (PDT) From: "=?UTF-8?q?Christian=20K=C3=B6nig?=" X-Google-Original-From: =?UTF-8?q?Christian=20K=C3=B6nig?= To: linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org Cc: daniel@ffwll.ch, tvrtko.ursulin@linux.intel.com Date: Thu, 16 Sep 2021 13:30:20 +0200 Message-Id: <20210916113042.3631-5-christian.koenig@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210916113042.3631-1-christian.koenig@amd.com> References: <20210916113042.3631-1-christian.koenig@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Thu, 16 Sep 2021 12:00:17 +0000 Subject: [Intel-gfx] [PATCH 04/26] dma-buf: use new iterator in dma_resv_get_fences v2 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This makes the function much simpler since the complex retry logic is now handled elsewhere. v2: use sizeof(void*) instead Signed-off-by: Christian König --- drivers/dma-buf/dma-resv.c | 110 +++++++++++++------------------------ 1 file changed, 37 insertions(+), 73 deletions(-) diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 91c040cb7d63..bba328475304 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -491,99 +491,63 @@ EXPORT_SYMBOL(dma_resv_copy_fences); * dma_resv_get_fences - Get an object's shared and exclusive * fences without update side lock held * @obj: the reservation object - * @pfence_excl: the returned exclusive fence (or NULL) - * @pshared_count: the number of shared fences returned - * @pshared: the array of shared fence ptrs returned (array is krealloc'd to + * @fence_excl: the returned exclusive fence (or NULL) + * @shared_count: the number of shared fences returned + * @shared: the array of shared fence ptrs returned (array is krealloc'd to * the required size, and must be freed by caller) * * Retrieve all fences from the reservation object. If the pointer for the * exclusive fence is not specified the fence is put into the array of the * shared fences as well. Returns either zero or -ENOMEM. */ -int dma_resv_get_fences(struct dma_resv *obj, struct dma_fence **pfence_excl, - unsigned int *pshared_count, - struct dma_fence ***pshared) +int dma_resv_get_fences(struct dma_resv *obj, struct dma_fence **fence_excl, + unsigned int *shared_count, struct dma_fence ***shared) { - struct dma_fence **shared = NULL; - struct dma_fence *fence_excl; - unsigned int shared_count; - int ret = 1; - - do { - struct dma_resv_list *fobj; - unsigned int i, seq; - size_t sz = 0; - - shared_count = i = 0; - - rcu_read_lock(); - seq = read_seqcount_begin(&obj->seq); - - fence_excl = dma_resv_excl_fence(obj); - if (fence_excl && !dma_fence_get_rcu(fence_excl)) - goto unlock; + struct dma_resv_iter cursor; + struct dma_fence *fence; - fobj = dma_resv_shared_list(obj); - if (fobj) - sz += sizeof(*shared) * fobj->shared_max; + *shared_count = 0; + *shared = NULL; - if (!pfence_excl && fence_excl) - sz += sizeof(*shared); + if (fence_excl) + *fence_excl = NULL; - if (sz) { - struct dma_fence **nshared; + rcu_read_lock(); + dma_resv_for_each_fence_unlocked(obj, &cursor, true, fence) { - nshared = krealloc(shared, sz, - GFP_NOWAIT | __GFP_NOWARN); - if (!nshared) { - rcu_read_unlock(); + if (cursor.is_first) { + unsigned int count; - dma_fence_put(fence_excl); - fence_excl = NULL; + while (*shared_count) + dma_fence_put((*shared)[--(*shared_count)]); - nshared = krealloc(shared, sz, GFP_KERNEL); - if (nshared) { - shared = nshared; - continue; - } + if (fence_excl) + dma_fence_put(*fence_excl); - ret = -ENOMEM; - break; - } - shared = nshared; - shared_count = fobj ? fobj->shared_count : 0; - for (i = 0; i < shared_count; ++i) { - shared[i] = rcu_dereference(fobj->shared[i]); - if (!dma_fence_get_rcu(shared[i])) - break; - } - } + count = cursor.fences ? cursor.fences->shared_count : 0; + count += fence_excl ? 0 : 1; + rcu_read_unlock(); - if (i != shared_count || read_seqcount_retry(&obj->seq, seq)) { - while (i--) - dma_fence_put(shared[i]); - dma_fence_put(fence_excl); - goto unlock; + /* Eventually re-allocate the array */ + *shared = krealloc_array(*shared, count, + sizeof(void *), + GFP_KERNEL); + if (count && !*shared) + return -ENOMEM; + rcu_read_lock(); } - ret = 0; -unlock: - rcu_read_unlock(); - } while (ret); - - if (pfence_excl) - *pfence_excl = fence_excl; - else if (fence_excl) - shared[shared_count++] = fence_excl; + if (dma_resv_iter_is_exclusive(&cursor) && fence_excl) + *fence_excl = fence; + else + (*shared)[(*shared_count)++] = fence; - if (!shared_count) { - kfree(shared); - shared = NULL; + /* Don't drop the reference */ + fence = NULL; } + rcu_read_unlock(); - *pshared_count = shared_count; - *pshared = shared; - return ret; + return 0; } EXPORT_SYMBOL_GPL(dma_resv_get_fences); -- 2.25.1