power: Include powerhintparser.[h|c]

Signed-off-by: Arvind Mukund <[email protected]>
Change-Id: I865536687d4b0dc597035a0ae6a6d71bbe8119be

power/powerhintparser.c

@@ -0,0 +1,185 @@
+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+#include <cutils/log.h>
+#include <fcntl.h>
+#include <string.h>
+#include <cutils/properties.h>
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+#include <unistd.h>
+#include "powerhintparser.h"
+
+#ifdef LOG_TAG
+// We want "QTI PowerHAL" as the log tag
+#undef LOG_TAG
+#endif
+
+#define LOG_TAG "QTI PowerHAL"
+
+int parsePowerhintXML() {
+
+    xmlDocPtr doc;
+    xmlNodePtr currNode;
+    const char *opcode_str, *value_str, *type_str;
+    int opcode = 0, value = 0, type = 0;
+    int numParams = 0;
+    static int hintCount;
+
+    if(access(POWERHINT_XML, F_OK) < 0) {
+        return -1;
+    }
+
+    doc = xmlReadFile(POWERHINT_XML, "UTF-8", XML_PARSE_RECOVER);
+    if(!doc) {
+        ALOGE("Document not parsed successfully");
+        return -1;
+    }
+
+    currNode = xmlDocGetRootElement(doc);
+    if(!currNode) {
+        ALOGE("Empty document");
+        xmlFreeDoc(doc);
+        xmlCleanupParser();
+        return -1;
+    }
+
+    // Confirm the root-element of the tree
+    if(xmlStrcmp(currNode->name, BAD_CAST "Powerhint")) {
+        ALOGE("document of the wrong type, root node != root");
+        xmlFreeDoc(doc);
+        xmlCleanupParser();
+        return -1;
+    }
+
+    currNode = currNode->xmlChildrenNode;
+
+    for(; currNode != NULL; currNode=currNode->next) {
+
+        if(currNode->type != XML_ELEMENT_NODE)
+            continue;
+
+        xmlNodePtr node = currNode;
+
+        if(hintCount == MAX_HINT) {
+            ALOGE("Number of hints exceeded the max count of %d\n",MAX_HINT);
+            break;
+        }
+
+        if(!xmlStrcmp(node->name, BAD_CAST "Hint")) {
+            if(xmlHasProp(node, BAD_CAST "type")) {
+               type_str = (const char*)xmlGetProp(node, BAD_CAST "type");
+               if (type_str == NULL)
+               {
+                   ALOGE("xmlGetProp failed on type");
+                   xmlFreeDoc(doc);
+                   xmlCleanupParser();
+                   return -1;
+               }
+               type = strtol(type_str, NULL, 16);
+            }
+
+            node = node->children;
+            while(node != NULL) {
+                if(!xmlStrcmp(node->name, BAD_CAST "Resource")) {
+
+                    if(xmlHasProp(node, BAD_CAST "opcode")) {
+                        opcode_str  = (const char*)xmlGetProp(node, BAD_CAST "opcode");
+                        if (opcode_str == NULL)
+                        {
+                            ALOGE("xmlGetProp failed on opcode");
+                            xmlFreeDoc(doc);
+                            xmlCleanupParser();
+                            return -1;
+                        }
+                        opcode = strtol(opcode_str, NULL, 16);
+                    }
+                    if(xmlHasProp(node, BAD_CAST "value")) {
+                        value_str = (const char*)xmlGetProp(node, BAD_CAST "value");
+                        if (value_str == NULL)
+                        {
+                            ALOGE("xmlGetProp failed on value");
+                            xmlFreeDoc(doc);
+                            xmlCleanupParser();
+                            return -1;
+                        }
+                        value = strtol(value_str, NULL, 16);
+                    }
+                    if(opcode > 0) {
+                        if(numParams < (MAX_PARAM-1)) {
+                            powerhint[hintCount].paramList[numParams++] = opcode;
+                            powerhint[hintCount].paramList[numParams++] = value;
+                        } else {
+                            ALOGE("Maximum parameters exceeded for Hint ID %x\n",type);
+                            opcode = value = 0;
+                            break;
+                        }
+                    }
+
+                    opcode = value = 0;
+                }
+                node = node->next;
+            }
+            powerhint[hintCount].type = type;
+            powerhint[hintCount].numParams = numParams;
+            numParams = 0;
+        }
+        hintCount++;
+    }
+
+    xmlFreeDoc(doc);
+    xmlCleanupParser();
+    return 0;
+}
+
+int* getPowerhint(int hint_id, int *params) {
+
+   int *result = NULL;
+
+   if(!hint_id)
+       return result;
+
+    ALOGI("Powerhal hint received=%x\n",hint_id);
+
+    if(!powerhint[0].numParams) {
+       parsePowerhintXML();
+    }
+
+    for(int i = 0; i < MAX_HINT; i++) {
+       if(hint_id == powerhint[i].type) {
+          *params = powerhint[i].numParams;
+          result = powerhint[i].paramList;
+          break;
+       }
+    }
+
+    /*for (int j = 0; j < *params; j++)
+        ALOGI("Powerhal resource again%x = \n", result[j]);*/
+
+       return result;
+}

power/powerhintparser.h

@@ -0,0 +1,48 @@
+/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef __POWERHINTPARSER__
+#define __POWERHINTPARSER__
+
+#define POWERHINT_XML      "/vendor/etc/powerhint.xml"
+#define MAX_HINT 6
+#define MAX_PARAM 30
+
+typedef struct perflock_param_t {
+    int type;
+    int numParams;
+    int paramList[MAX_PARAM];//static limit on number of hints - 15
+}perflock_param_t;
+
+static perflock_param_t powerhint[MAX_HINT];
+
+int parsePowerhintXML();
+int *getPowerhint(int, int*);
+
+#endif /* __POWERHINTPARSER__ */