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GET /api/patches/1032832/?format=api
{ "id": 1032832, "url": "http://patchwork.ozlabs.org/api/patches/1032832/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/20190129150143.12681-14-mika.westerberg@linux.intel.com/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/projects/7/?format=api", "name": "Linux network development", "link_name": "netdev", "list_id": "netdev.vger.kernel.org", "list_email": "netdev@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20190129150143.12681-14-mika.westerberg@linux.intel.com>", "list_archive_url": null, "date": "2019-01-29T15:01:28", "name": "[13/28] thunderbolt: Add helper function to iterate from one port to another", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": false, "hash": "c4c80128dc15665650ac4f7984f2a575fb5650db", "submitter": { "id": 14534, "url": "http://patchwork.ozlabs.org/api/people/14534/?format=api", "name": "Mika Westerberg", "email": "mika.westerberg@linux.intel.com" }, "delegate": { "id": 34, "url": "http://patchwork.ozlabs.org/api/users/34/?format=api", "username": "davem", "first_name": "David", "last_name": "Miller", "email": "davem@davemloft.net" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/20190129150143.12681-14-mika.westerberg@linux.intel.com/mbox/", "series": [ { "id": 88859, "url": "http://patchwork.ozlabs.org/api/series/88859/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=88859", "date": "2019-01-29T15:01:18", "name": "thunderbolt: Software connection manager improvements", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/88859/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/1032832/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/1032832/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<netdev-owner@vger.kernel.org>", "X-Original-To": "patchwork-incoming-netdev@ozlabs.org", "Delivered-To": "patchwork-incoming-netdev@ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=<UNKNOWN>)", "ozlabs.org; dmarc=none (p=none dis=none)\n\theader.from=linux.intel.com" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 43pqYD2vXjz9sML\n\tfor <patchwork-incoming-netdev@ozlabs.org>;\n\tWed, 30 Jan 2019 02:05:04 +1100 (AEDT)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1728795AbfA2PFA (ORCPT\n\t<rfc822;patchwork-incoming-netdev@ozlabs.org>);\n\tTue, 29 Jan 2019 10:05:00 -0500", "from mga02.intel.com ([134.134.136.20]:34504 \"EHLO mga02.intel.com\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1728265AbfA2PBx (ORCPT <rfc822;netdev@vger.kernel.org>);\n\tTue, 29 Jan 2019 10:01:53 -0500", "from fmsmga004.fm.intel.com ([10.253.24.48])\n\tby orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t29 Jan 2019 07:01:51 -0800", "from black.fi.intel.com ([10.237.72.28])\n\tby fmsmga004.fm.intel.com with ESMTP; 29 Jan 2019 07:01:48 -0800", "by black.fi.intel.com (Postfix, from userid 1001)\n\tid C9ACB7C4; Tue, 29 Jan 2019 17:01:44 +0200 (EET)" ], "X-Amp-Result": "SKIPPED(no attachment in message)", "X-Amp-File-Uploaded": "False", "X-ExtLoop1": "1", "X-IronPort-AV": "E=Sophos;i=\"5.56,537,1539673200\"; d=\"scan'208\";a=\"139779829\"", "From": "Mika Westerberg <mika.westerberg@linux.intel.com>", "To": "linux-kernel@vger.kernel.org", "Cc": "Michael Jamet <michael.jamet@intel.com>,\n\tYehezkel Bernat <YehezkelShB@gmail.com>,\n\tAndreas Noever <andreas.noever@gmail.com>,\n\tLukas Wunner <lukas@wunner.de>, \"David S . Miller\" <davem@davemloft.net>,\n\tMika Westerberg <mika.westerberg@linux.intel.com>,\n\tAndy Shevchenko <andriy.shevchenko@linux.intel.com>,\n\tnetdev@vger.kernel.org", "Subject": "[PATCH 13/28] thunderbolt: Add helper function to iterate from one\n\tport to another", "Date": "Tue, 29 Jan 2019 18:01:28 +0300", "Message-Id": "<20190129150143.12681-14-mika.westerberg@linux.intel.com>", "X-Mailer": "git-send-email 2.20.1", "In-Reply-To": "<20190129150143.12681-1-mika.westerberg@linux.intel.com>", "References": "<20190129150143.12681-1-mika.westerberg@linux.intel.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Sender": "netdev-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<netdev.vger.kernel.org>", "X-Mailing-List": "netdev@vger.kernel.org" }, "content": "We need to be able to walk from one port to another when we are creating\npaths where there are multiple switches between two ports. For this\nreason introduce a new function tb_port_get_next() and a new macro\ntb_for_each_port().\n\nSigned-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>\n---\n drivers/thunderbolt/switch.c | 60 ++++++++++++++++++++++++++++++++++++\n drivers/thunderbolt/tb.h | 6 ++++\n 2 files changed, 66 insertions(+)", "diff": "diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c\nindex ae366c252c74..d0f9e3a01851 100644\n--- a/drivers/thunderbolt/switch.c\n+++ b/drivers/thunderbolt/switch.c\n@@ -683,6 +683,66 @@ void tb_port_release_out_hopid(struct tb_port *port, int hopid)\n \tida_simple_remove(&port->out_hopids, hopid);\n }\n \n+/**\n+ * tb_port_get_next() - Return next port for given port\n+ * @start: Start port of the walk\n+ * @end: End port of the walk\n+ * @prev: Previous port (%NULL if this is the first)\n+ *\n+ * This function can be used to walk from one port to another if they\n+ * are connected through zero or more switches. If the @prev is dual\n+ * link port, the function follows that link and returns another end on\n+ * that same link.\n+ *\n+ * If the walk cannot be continued, returns %NULL.\n+ *\n+ * Domain tb->lock must be held when this function is called.\n+ */\n+struct tb_port *tb_port_get_next(struct tb_port *start, struct tb_port *end,\n+\t\t\t\t struct tb_port *prev)\n+{\n+\tstruct tb_port *port, *next;\n+\n+\tif (!prev)\n+\t\treturn start;\n+\n+\tif (prev->sw == end->sw) {\n+\t\tif (prev != end)\n+\t\t\treturn end;\n+\t\treturn NULL;\n+\t}\n+\n+\t/* Switch back to use primary links for walking */\n+\tif (prev->dual_link_port && prev->link_nr)\n+\t\tport = prev->dual_link_port;\n+\telse\n+\t\tport = prev;\n+\n+\tif (start->sw->config.depth < end->sw->config.depth) {\n+\t\tif (port->remote &&\n+\t\t port->remote->sw->config.depth > port->sw->config.depth)\n+\t\t\tnext = port->remote;\n+\t\telse\n+\t\t\tnext = tb_port_at(tb_route(end->sw), port->sw);\n+\t} else if (start->sw->config.depth > end->sw->config.depth) {\n+\t\tif (tb_is_upstream_port(port))\n+\t\t\tnext = port->remote;\n+\t\telse\n+\t\t\tnext = tb_upstream_port(port->sw);\n+\t} else {\n+\t\t/* Must be the same switch then */\n+\t\tif (start->sw != end->sw)\n+\t\t\treturn NULL;\n+\t\treturn end;\n+\t}\n+\n+\t/* If prev was dual link return another end of that link then */\n+\tif (next->dual_link_port && next->link_nr != prev->link_nr)\n+\t\treturn next->dual_link_port;\n+\n+\treturn next;\n+}\n+\n /**\n * tb_pci_port_enable() - Enable PCIe adapter port\n * @port: PCIe port to enable\ndiff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h\nindex a4f835c4bdc2..360333caa3c4 100644\n--- a/drivers/thunderbolt/tb.h\n+++ b/drivers/thunderbolt/tb.h\n@@ -448,6 +448,12 @@ int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);\n void tb_port_release_in_hopid(struct tb_port *port, int hopid);\n int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);\n void tb_port_release_out_hopid(struct tb_port *port, int hopid);\n+struct tb_port *tb_port_get_next(struct tb_port *start, struct tb_port *end,\n+\t\t\t\t struct tb_port *prev);\n+\n+#define tb_for_each_port(port, start, end)\t\t\t\\\n+\tfor (port = tb_port_get_next(start, end, NULL); port;\t\\\n+\t port = tb_port_get_next(start, end, port))\n \n int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);\n int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);\n", "prefixes": [ "13/28" ] }