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GET /api/patches/27780/?format=api
{ "id": 27780, "url": "http://patches.dpdk.org/api/patches/27780/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20170823141213.25476-10-shreyansh.jain@nxp.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20170823141213.25476-10-shreyansh.jain@nxp.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20170823141213.25476-10-shreyansh.jain@nxp.com", "date": "2017-08-23T14:11:42", "name": "[dpdk-dev,v3,09/40] bus/dpaa: add routines for managing a RB tree", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "b07127cf39f65f12dc156eedd6506859914a3552", "submitter": { "id": 497, "url": "http://patches.dpdk.org/api/people/497/?format=api", "name": "Shreyansh Jain", "email": "shreyansh.jain@nxp.com" }, "delegate": null, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20170823141213.25476-10-shreyansh.jain@nxp.com/mbox/", "series": [], "comments": "http://patches.dpdk.org/api/patches/27780/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/27780/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [IPv6:::1])\n\tby dpdk.org (Postfix) with ESMTP id E3C699125;\n\tWed, 23 Aug 2017 16:02:51 +0200 (CEST)", "from NAM02-CY1-obe.outbound.protection.outlook.com\n\t(mail-cys01nam02on0041.outbound.protection.outlook.com\n\t[104.47.37.41]) by dpdk.org (Postfix) with ESMTP id A98DE90F8\n\tfor <dev@dpdk.org>; Wed, 23 Aug 2017 16:02:48 +0200 (CEST)", "from CY1PR03CA0035.namprd03.prod.outlook.com (10.174.128.45) by\n\tCY1PR03MB2267.namprd03.prod.outlook.com (10.166.207.19) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id\n\t15.1.1362.18; Wed, 23 Aug 2017 14:02:47 +0000", "from BN1AFFO11FD035.protection.gbl (2a01:111:f400:7c10::129) by\n\tCY1PR03CA0035.outlook.office365.com (2603:10b6:600::45) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id\n\t15.1.1362.18 via Frontend Transport; Wed, 23 Aug 2017 14:02:47 +0000", "from tx30smr01.am.freescale.net (192.88.168.50) by\n\tBN1AFFO11FD035.mail.protection.outlook.com (10.58.52.159) with\n\tMicrosoft SMTP Server (version=TLS1_0,\n\tcipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1341.15\n\tvia Frontend Transport; Wed, 23 Aug 2017 14:02:46 +0000", "from Tophie.ap.freescale.net ([10.232.14.39])\n\tby tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id\n\tv7NE2Q2t004389; Wed, 23 Aug 2017 07:02:44 -0700" ], "Authentication-Results": "spf=fail (sender IP is 192.88.168.50)\n\tsmtp.mailfrom=nxp.com; nxp.com; dkim=none (message not signed)\n\theader.d=none;nxp.com; dmarc=fail action=none header.from=nxp.com;", "Received-SPF": "Fail (protection.outlook.com: domain of nxp.com does not\n\tdesignate 192.88.168.50 as permitted sender)\n\treceiver=protection.outlook.com; \n\tclient-ip=192.88.168.50; helo=tx30smr01.am.freescale.net;", "From": "Shreyansh Jain <shreyansh.jain@nxp.com>", "To": "<dev@dpdk.org>", "CC": "<ferruh.yigit@intel.com>, <hemant.agrawal@nxp.com>", "Date": "Wed, 23 Aug 2017 19:41:42 +0530", "Message-ID": "<20170823141213.25476-10-shreyansh.jain@nxp.com>", "X-Mailer": "git-send-email 2.9.3", "In-Reply-To": "<20170823141213.25476-1-shreyansh.jain@nxp.com>", "References": "<1499179471-19145-1-git-send-email-shreyansh.jain@nxp.com>\n\t<20170823141213.25476-1-shreyansh.jain@nxp.com>", "X-EOPAttributedMessage": "0", "X-Matching-Connectors": "131479705672367290;\n\t(91ab9b29-cfa4-454e-5278-08d120cd25b8); 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BCL:0; PCL:0;\n\tRULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(400006)(100000804101)(100110200095)(100000805101)(100110500095);\n\tSRVR:CY1PR03MB2267; ", "X-Forefront-PRVS": "040866B734", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "23 Aug 2017 14:02:46.9247\n\t(UTC)", "X-MS-Exchange-CrossTenant-Id": "5afe0b00-7697-4969-b663-5eab37d5f47e", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e;\n\tIp=[192.88.168.50]; \n\tHelo=[tx30smr01.am.freescale.net]", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "CY1PR03MB2267", "Subject": "[dpdk-dev] [PATCH v3 09/40] bus/dpaa: add routines for managing a\n\tRB tree", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<http://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://dpdk.org/ml/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<http://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "QMAN frames are managed over a RB tree data structure.\nThis patch introduces necessary routines for implementing a RB tree.\n\nSigned-off-by: Geoff Thorpe <geoff.thorpe@nxp.com>\nSigned-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>\nSigned-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>\n---\n drivers/bus/dpaa/include/dpaa_rbtree.h | 143 +++++++++++++++++++++++++++++++++\n 1 file changed, 143 insertions(+)\n create mode 100644 drivers/bus/dpaa/include/dpaa_rbtree.h", "diff": "diff --git a/drivers/bus/dpaa/include/dpaa_rbtree.h b/drivers/bus/dpaa/include/dpaa_rbtree.h\nnew file mode 100644\nindex 0000000..f8c9b59\n--- /dev/null\n+++ b/drivers/bus/dpaa/include/dpaa_rbtree.h\n@@ -0,0 +1,143 @@\n+/*-\n+ * BSD LICENSE\n+ *\n+ * Copyright 2017 NXP.\n+ *\n+ * Redistribution and use in source and binary forms, with or without\n+ * modification, are permitted provided that the following conditions\n+ * are met:\n+ *\n+ * * Redistributions of source code must retain the above copyright\n+ * notice, this list of conditions and the following disclaimer.\n+ * * Redistributions in binary form must reproduce the above copyright\n+ * notice, this list of conditions and the following disclaimer in\n+ * the documentation and/or other materials provided with the\n+ * distribution.\n+ * * Neither the name of NXP nor the names of its\n+ * contributors may be used to endorse or promote products derived\n+ * from this software without specific prior written permission.\n+ *\n+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n+ * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n+ */\n+\n+#ifndef __DPAA_RBTREE_H\n+#define __DPAA_RBTREE_H\n+\n+#include <rte_common.h>\n+/************/\n+/* RB-trees */\n+/************/\n+\n+/* Linux has a good RB-tree implementation, that we can't use (GPL). It also has\n+ * a flat/hooked-in interface that virtually requires license-contamination in\n+ * order to write a caller-compatible implementation. Instead, I've created an\n+ * RB-tree encapsulation on top of linux's primitives (it does some of the work\n+ * the client logic would normally do), and this gives us something we can\n+ * reimplement on LWE. Unfortunately there's no good+free RB-tree\n+ * implementations out there that are license-compatible and \"flat\" (ie. no\n+ * dynamic allocation). I did find a malloc-based one that I could convert, but\n+ * that will be a task for later on. For now, LWE's RB-tree is implemented using\n+ * an ordered linked-list.\n+ *\n+ * Note, the only linux-esque type is \"struct rb_node\", because it's used\n+ * statically in the exported header, so it can't be opaque. Our version doesn't\n+ * include a \"rb_parent_color\" field because we're doing linked-list instead of\n+ * a true rb-tree.\n+ */\n+\n+struct rb_node {\n+\tstruct rb_node *prev, *next;\n+};\n+\n+struct dpa_rbtree {\n+\tstruct rb_node *head, *tail;\n+};\n+\n+#define DPAA_RBTREE { NULL, NULL }\n+static inline void dpa_rbtree_init(struct dpa_rbtree *tree)\n+{\n+\ttree->head = tree->tail = NULL;\n+}\n+\n+#define QMAN_NODE2OBJ(ptr, type, node_field) \\\n+\t(type *)((char *)ptr - offsetof(type, node_field))\n+\n+#define IMPLEMENT_DPAA_RBTREE(name, type, node_field, val_field) \\\n+static inline int name##_push(struct dpa_rbtree *tree, type *obj) \\\n+{ \\\n+\tstruct rb_node *node = tree->head; \\\n+\tif (!node) { \\\n+\t\ttree->head = tree->tail = &obj->node_field; \\\n+\t\tobj->node_field.prev = obj->node_field.next = NULL; \\\n+\t\treturn 0; \\\n+\t} \\\n+\twhile (node) { \\\n+\t\ttype *item = QMAN_NODE2OBJ(node, type, node_field); \\\n+\t\tif (obj->val_field == item->val_field) \\\n+\t\t\treturn -EBUSY; \\\n+\t\tif (obj->val_field < item->val_field) { \\\n+\t\t\tif (tree->head == node) \\\n+\t\t\t\ttree->head = &obj->node_field; \\\n+\t\t\telse \\\n+\t\t\t\tnode->prev->next = &obj->node_field; \\\n+\t\t\tobj->node_field.prev = node->prev; \\\n+\t\t\tobj->node_field.next = node; \\\n+\t\t\tnode->prev = &obj->node_field; \\\n+\t\t\treturn 0; \\\n+\t\t} \\\n+\t\tnode = node->next; \\\n+\t} \\\n+\tobj->node_field.prev = tree->tail; \\\n+\tobj->node_field.next = NULL; \\\n+\ttree->tail->next = &obj->node_field; \\\n+\ttree->tail = &obj->node_field; \\\n+\treturn 0; \\\n+} \\\n+static inline void name##_del(struct dpa_rbtree *tree, type *obj) \\\n+{ \\\n+\tif (tree->head == &obj->node_field) { \\\n+\t\tif (tree->tail == &obj->node_field) \\\n+\t\t\t/* Only item in the list */ \\\n+\t\t\ttree->head = tree->tail = NULL; \\\n+\t\telse { \\\n+\t\t\t/* Is the head, next != NULL */ \\\n+\t\t\ttree->head = tree->head->next; \\\n+\t\t\ttree->head->prev = NULL; \\\n+\t\t} \\\n+\t} else { \\\n+\t\tif (tree->tail == &obj->node_field) { \\\n+\t\t\t/* Is the tail, prev != NULL */ \\\n+\t\t\ttree->tail = tree->tail->prev; \\\n+\t\t\ttree->tail->next = NULL; \\\n+\t\t} else { \\\n+\t\t\t/* Is neither the head nor the tail */ \\\n+\t\t\tobj->node_field.prev->next = obj->node_field.next; \\\n+\t\t\tobj->node_field.next->prev = obj->node_field.prev; \\\n+\t\t} \\\n+\t} \\\n+} \\\n+static inline type *name##_find(struct dpa_rbtree *tree, u32 val) \\\n+{ \\\n+\tstruct rb_node *node = tree->head; \\\n+\twhile (node) { \\\n+\t\ttype *item = QMAN_NODE2OBJ(node, type, node_field); \\\n+\t\tif (val == item->val_field) \\\n+\t\t\treturn item; \\\n+\t\tif (val < item->val_field) \\\n+\t\t\treturn NULL; \\\n+\t\tnode = node->next; \\\n+\t} \\\n+\treturn NULL; \\\n+}\n+\n+#endif /* __DPAA_RBTREE_H */\n", "prefixes": [ "dpdk-dev", "v3", "09/40" ] }