From patchwork Tue Feb 2 07:41:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 374605 Delivered-To: patches@linaro.org Received: by 2002:a17:906:24d5:0:0:0:0 with SMTP id f21csp18438ejb; Mon, 1 Feb 2021 23:41:57 -0800 (PST) X-Received: by 2002:a17:90b:4c8e:: with SMTP id my14mr2930240pjb.30.1612251717732; Mon, 01 Feb 2021 23:41:57 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1612251717; cv=none; d=google.com; s=arc-20160816; b=PNn+VZqeb+4VdIz2bMzJ7OH8kYINBF/ogc/SLlPTpDBNbJqzQXLeBRQhxZM3kRaPxa 52gU364nB5VkZcl2etzbgRBzLetZV+HKzUNl0bmfjyamsYxL3bpHxRZEjVh6/WxBqL5j 7Y6XJvQCwSniujtWYVaa61YqJu43Y3lLPYgOdvwuIInJ+4blCRJU3y9ACyzkxBv1/tQq kSmr3sLdSUE6cmY59HOywelOVOQ3i9GS9LLqZeiAvOfdvYCrVSA2kM9cptJdlIRBXRig QIUCk6+ni8f79TaexPC/COYDTSwidRxXqj+7Rm+0BJbgpSPcqmrOgkwStqcRsw5tMFB3 0C9A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=u7Mc2AcSMkO8KsWlbyrx1biPcgp0/MBcOs2WeW9V+WI=; b=cm03In1/cNqeoIaeDnnhvtG9ZuXqOlerLSte5bnKZQARkuF3nh6+aEyWJGxSq5QK8q PqpIyLzdUgigI1FauTujv0cYmnYKkAXh1D9CKTR+j8KtIGnsBp+h9CecB6Z5t0gM9Jfp +7Ilv+/GGYikTzShXSi4ORHwf1MtCWXZC7t6fxXmOFbcJ3amWzjAlg6tkpM1fPF4o82I GKe4gzNwx7fm5/BC0Tp6b8TPLdIhSjOzzJpIgz95pD4tgmfVaPfasCawxOCAqh5j6AeP wxVNaFj1be5HkKzdynrzZRvxSbcsBG0Lf2P2qAjfjy+ECAHCxh8qeGuRyKNZ0bYLWwI8 iWFw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=SBs13L9M; spf=pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id s2sor9541278pgk.9.2021.02.01.23.41.57 for (Google Transport Security); Mon, 01 Feb 2021 23:41:57 -0800 (PST) Received-SPF: pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=SBs13L9M; spf=pass (google.com: domain of john.stultz@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=john.stultz@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=u7Mc2AcSMkO8KsWlbyrx1biPcgp0/MBcOs2WeW9V+WI=; b=SBs13L9MNFGArhMzTxc71ashaeU0ze5N2Id1aS++ROzigw0extwaQVqTf4WVPYqDM+ 5NArkkoDLijYnQ+ffWVSLzn7rSLjjraHlKJT3ptLZjors8uPWZUc/+I8L5AFxl1WdTf6 dAzhWayv3L390Dd/2/dcoFjDSxdnwKgpvzjkSqWgbMsxkCPovjsTJK72r+odrEZSwHry RIp4g3Lyq3aHZWmfFbCqVR/RIhb7sTgZYq3yEyqQUxLYoq/QLOjRsSrgbOtWvBLsu6m6 5vux2zdtOZHDR9nlpJFu+eeAlNxNLQmAZha945jx4x42N8uo5Pqpz0RYIOM3wSIttfUB Vp7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=u7Mc2AcSMkO8KsWlbyrx1biPcgp0/MBcOs2WeW9V+WI=; b=O7Etd5aCgWfMJwjCF71OmGfU9BthszSJotKvYP4nd8brWE+lDe4JMAY1GjFApN5IGP vWEp1eeKTwA7J6pkQQ0fJaEtDoH8Jmuf4v/O0nRsAEXZC/NLoZCfZ77c+/x4zJwOl9Fc f2Nuqy3hMYJcVtceN1p5lyKAa7RNvghfRCcHxY+FWJD4zyS0jrdYxgZdFoImVxW6EPqB XoOAzKzjpZCg0yUZKumw/QQAf+xLhmOjKjf3XqJwFuBJt0qgyjmqeFPC+B8F337vgkRI F/6bT3++KKtDd3yDHSg28oHxyNCnzrZ2ai6mjk8YruwabzH1BnWHQkLvUunyUMDWOXD7 NJJQ== X-Gm-Message-State: AOAM5310+7exF7MiLpvvMaf4yZ7MXH0iQwVhkhxzquDkrv9MkGTmtR6N vvPYwBlwazCzKdeWL86+JlIPEjtd X-Google-Smtp-Source: ABdhPJzmEqpXC9JYkjxUJiCc+lCgUYOsB0+3oOAgDYHvD7hNQFsWd0L2lsZbLgcLujo65GYIKAU/5Q== X-Received: by 2002:a63:5f13:: with SMTP id t19mr20755757pgb.193.1612251717326; Mon, 01 Feb 2021 23:41:57 -0800 (PST) Return-Path: Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id k9sm9410666pgh.94.2021.02.01.23.41.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Feb 2021 23:41:56 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Daniel Vetter , Sumit Semwal , Liam Mark , Chris Goldsworthy , Laura Abbott , Brian Starkey , Hridya Valsaraju , Suren Baghdasaryan , Sandeep Patil , Daniel Mentz , =?utf-8?q?=C3=98rjan_Eide?= , Robin Murphy , Ezequiel Garcia , Simon Ser , James Jones , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v4 2/3] dma-buf: system_heap: Add pagepool support to system heap Date: Tue, 2 Feb 2021 07:41:50 +0000 Message-Id: <20210202074151.3146795-2-john.stultz@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210202074151.3146795-1-john.stultz@linaro.org> References: <20210202074151.3146795-1-john.stultz@linaro.org> MIME-Version: 1.0 Reuse/abuse the pagepool code from the network code to speed up allocation performance. This is similar to the ION pagepool usage, but tries to utilize generic code instead of a custom implementation. Cc: Daniel Vetter Cc: Sumit Semwal Cc: Liam Mark Cc: Chris Goldsworthy Cc: Laura Abbott Cc: Brian Starkey Cc: Hridya Valsaraju Cc: Suren Baghdasaryan Cc: Sandeep Patil Cc: Daniel Mentz Cc: Ørjan Eide Cc: Robin Murphy Cc: Ezequiel Garcia Cc: Simon Ser Cc: James Jones Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: John Stultz --- v2: * Fix build issue caused by selecting PAGE_POOL w/o NET as Reported-by: kernel test robot v3: * Simplify the page zeroing logic a bit by using kmap_atomic instead of vmap as suggested by Daniel Mentz --- drivers/dma-buf/heaps/Kconfig | 2 ++ drivers/dma-buf/heaps/system_heap.c | 52 ++++++++++++++++++++++++++--- 2 files changed, 50 insertions(+), 4 deletions(-) -- 2.25.1 diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig index f7aef8bc7119..45c7d277448b 100644 --- a/drivers/dma-buf/heaps/Kconfig +++ b/drivers/dma-buf/heaps/Kconfig @@ -4,6 +4,8 @@ config DMABUF_HEAPS_DEFERRED_FREE config DMABUF_HEAPS_SYSTEM bool "DMA-BUF System Heap" depends on DMABUF_HEAPS + select NET + select PAGE_POOL help Choose this option to enable the system dmabuf heap. The system heap is backed by pages from the buddy allocator. If in doubt, say Y. diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c index 17e0e9a68baf..2addb6d832e0 100644 --- a/drivers/dma-buf/heaps/system_heap.c +++ b/drivers/dma-buf/heaps/system_heap.c @@ -20,6 +20,7 @@ #include #include #include +#include static struct dma_heap *sys_heap; @@ -53,6 +54,7 @@ static gfp_t order_flags[] = {HIGH_ORDER_GFP, LOW_ORDER_GFP, LOW_ORDER_GFP}; */ static const unsigned int orders[] = {8, 4, 0}; #define NUM_ORDERS ARRAY_SIZE(orders) +struct page_pool *pools[NUM_ORDERS]; static struct sg_table *dup_sg_table(struct sg_table *table) { @@ -281,18 +283,43 @@ static void system_heap_vunmap(struct dma_buf *dmabuf, struct dma_buf_map *map) dma_buf_map_clear(map); } +static int system_heap_zero_buffer(struct system_heap_buffer *buffer) +{ + struct sg_table *sgt = &buffer->sg_table; + struct sg_page_iter piter; + struct page *p; + void *vaddr; + int ret = 0; + + for_each_sgtable_page(sgt, &piter, 0) { + p = sg_page_iter_page(&piter); + vaddr = kmap_atomic(p); + memset(vaddr, 0, PAGE_SIZE); + kunmap_atomic(vaddr); + } + + return ret; +} + static void system_heap_dma_buf_release(struct dma_buf *dmabuf) { struct system_heap_buffer *buffer = dmabuf->priv; struct sg_table *table; struct scatterlist *sg; - int i; + int i, j; + + /* Zero the buffer pages before adding back to the pool */ + system_heap_zero_buffer(buffer); table = &buffer->sg_table; for_each_sg(table->sgl, sg, table->nents, i) { struct page *page = sg_page(sg); - __free_pages(page, compound_order(page)); + for (j = 0; j < NUM_ORDERS; j++) { + if (compound_order(page) == orders[j]) + break; + } + page_pool_put_full_page(pools[j], page, false); } sg_free_table(table); kfree(buffer); @@ -322,8 +349,7 @@ static struct page *alloc_largest_available(unsigned long size, continue; if (max_order < orders[i]) continue; - - page = alloc_pages(order_flags[i], orders[i]); + page = page_pool_alloc_pages(pools[i], order_flags[i]); if (!page) continue; return page; @@ -428,6 +454,24 @@ static const struct dma_heap_ops system_heap_ops = { static int system_heap_create(void) { struct dma_heap_export_info exp_info; + int i; + + for (i = 0; i < NUM_ORDERS; i++) { + struct page_pool_params pp; + + memset(&pp, 0, sizeof(pp)); + pp.order = orders[i]; + pools[i] = page_pool_create(&pp); + + if (IS_ERR(pools[i])) { + int j; + + pr_err("%s: page pool creation failed!\n", __func__); + for (j = 0; j < i; j++) + page_pool_destroy(pools[j]); + return PTR_ERR(pools[i]); + } + } exp_info.name = "system"; exp_info.ops = &system_heap_ops;