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GET /api/patches/712007/?format=api
{ "id": 712007, "url": "http://patchwork.ozlabs.org/api/patches/712007/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20170106161043.2030.19954.stgit@localhost.localdomain/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170106161043.2030.19954.stgit@localhost.localdomain>", "list_archive_url": null, "date": "2017-01-06T16:10:43", "name": "[next,1/9] igb: Add support for DMA_ATTR_WEAK_ORDERING", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "651d981a7349c6193a7a70ed52cd57667525ea1b", "submitter": { "id": 252, "url": "http://patchwork.ozlabs.org/api/people/252/?format=api", "name": "Alexander Duyck", "email": "alexander.duyck@gmail.com" }, "delegate": { "id": 68, "url": "http://patchwork.ozlabs.org/api/users/68/?format=api", "username": "jtkirshe", "first_name": "Jeff", "last_name": "Kirsher", "email": "jeffrey.t.kirsher@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20170106161043.2030.19954.stgit@localhost.localdomain/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/712007/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/712007/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@lists.osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Received": [ "from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3tw8n90yd4z9ryZ\n\tfor <incoming@patchwork.ozlabs.org>;\n\tSat, 7 Jan 2017 03:16:29 +1100 (AEDT)", "from localhost (localhost [127.0.0.1])\n\tby whitealder.osuosl.org (Postfix) with ESMTP id 9C59D85C63;\n\tFri, 6 Jan 2017 16:16:27 +0000 (UTC)", "from whitealder.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id 5lOSmfQQiaIO; 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\n\tFri, 06 Jan 2017 08:10:44 -0800 (PST)", "From": "Alexander Duyck <alexander.duyck@gmail.com>", "To": "intel-wired-lan@lists.osuosl.org, jeffrey.t.kirsher@intel.com", "Date": "Fri, 06 Jan 2017 08:10:43 -0800", "Message-ID": "<20170106161043.2030.19954.stgit@localhost.localdomain>", "In-Reply-To": "<20170106160850.2030.39073.stgit@localhost.localdomain>", "References": "<20170106160850.2030.39073.stgit@localhost.localdomain>", "User-Agent": "StGit/0.17.1-dirty", "MIME-Version": "1.0", "Subject": "[Intel-wired-lan] [next PATCH 1/9] igb: Add support for\n\tDMA_ATTR_WEAK_ORDERING", "X-BeenThere": "intel-wired-lan@lists.osuosl.org", "X-Mailman-Version": "2.1.18-1", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n\t<intel-wired-lan.lists.osuosl.org>", "List-Unsubscribe": "<http://lists.osuosl.org/mailman/options/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@lists.osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@lists.osuosl.org?subject=help>", "List-Subscribe": "<http://lists.osuosl.org/mailman/listinfo/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "intel-wired-lan-bounces@lists.osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@lists.osuosl.org>" }, "content": "From: Alexander Duyck <alexander.h.duyck@intel.com>\n\nSince we are already using DMA attributes in igb for Rx there is no reason\nwhy we can't also apply DMA_ATTR_WEAK_ORDERING which is needed on some\nplatforms to improve performance.\n\nSigned-off-by: Alexander Duyck <alexander.h.duyck@intel.com>\n---\n drivers/net/ethernet/intel/igb/igb.h | 3 +++\n drivers/net/ethernet/intel/igb/igb_main.c | 6 +++---\n 2 files changed, 6 insertions(+), 3 deletions(-)", "diff": "diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h\nindex acbc3abe2ddd..87c9fe9d6f18 100644\n--- a/drivers/net/ethernet/intel/igb/igb.h\n+++ b/drivers/net/ethernet/intel/igb/igb.h\n@@ -148,6 +148,9 @@ struct vf_data_storage {\n /* How many Rx Buffers do we bundle into one write to the hardware ? */\n #define IGB_RX_BUFFER_WRITE\t16 /* Must be power of 2 */\n \n+#define IGB_RX_DMA_ATTR \\\n+\t(DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)\n+\n #define AUTO_ALL_MODES\t\t0\n #define IGB_EEPROM_APME\t\t0x0400\n \ndiff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c\nindex cb08900c9cf2..eede6db6037c 100644\n--- a/drivers/net/ethernet/intel/igb/igb_main.c\n+++ b/drivers/net/ethernet/intel/igb/igb_main.c\n@@ -3963,7 +3963,7 @@ static void igb_clean_rx_ring(struct igb_ring *rx_ring)\n \t\t\t\t buffer_info->dma,\n \t\t\t\t PAGE_SIZE,\n \t\t\t\t DMA_FROM_DEVICE,\n-\t\t\t\t DMA_ATTR_SKIP_CPU_SYNC);\n+\t\t\t\t IGB_RX_DMA_ATTR);\n \t\t__page_frag_cache_drain(buffer_info->page,\n \t\t\t\t\tbuffer_info->pagecnt_bias);\n \n@@ -6992,7 +6992,7 @@ static struct sk_buff *igb_fetch_rx_buffer(struct igb_ring *rx_ring,\n \t\t */\n \t\tdma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,\n \t\t\t\t PAGE_SIZE, DMA_FROM_DEVICE,\n-\t\t\t\t DMA_ATTR_SKIP_CPU_SYNC);\n+\t\t\t\t IGB_RX_DMA_ATTR);\n \t\t__page_frag_cache_drain(page, rx_buffer->pagecnt_bias);\n \t}\n \n@@ -7252,7 +7252,7 @@ static bool igb_alloc_mapped_page(struct igb_ring *rx_ring,\n \n \t/* map page for use */\n \tdma = dma_map_page_attrs(rx_ring->dev, page, 0, PAGE_SIZE,\n-\t\t\t\t DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC);\n+\t\t\t\t DMA_FROM_DEVICE, IGB_RX_DMA_ATTR);\n \n \t/* if mapping failed free memory back to system since\n \t * there isn't much point in holding memory we can't use\n", "prefixes": [ "next", "1/9" ] }