Changeset 925a21e in mainline for uspace/srv/devman/devman.c
- Timestamp:
- 2011-09-24T14:20:29Z (13 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 5bf76c1
- Parents:
- 867e2555 (diff), 1ab4aca (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the(diff)
links above to see all the changes relative to each parent. - File:
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- 1 edited
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uspace/srv/devman/devman.c
r867e2555 r925a21e 30 30 * @{ 31 31 */ 32 /** @file Device Manager 33 * 34 * Locking order: 35 * (1) driver_t.driver_mutex 36 * (2) dev_tree_t.rwlock 37 * 38 * Synchronization: 39 * - device_tree.rwlock protects: 40 * - tree root, complete tree topology 41 * - complete contents of device and function nodes 42 * - dev_node_t.refcnt, fun_node_t.refcnt prevent nodes from 43 * being deallocated 44 * - find_xxx() functions increase reference count of returned object 45 * - find_xxx_no_lock() do not increase reference count 46 * 47 * TODO 48 * - Track all steady and transient device/function states 49 * - Check states, wait for steady state on certain operations 50 */ 32 51 33 52 #include <errno.h> … … 37 56 #include <ipc/driver.h> 38 57 #include <ipc/devman.h> 39 #include < devmap.h>58 #include <loc.h> 40 59 #include <str_error.h> 41 60 #include <stdio.h> … … 43 62 #include "devman.h" 44 63 45 fun_node_t *find_node_child(fun_node_t *parent, const char *name);64 static fun_node_t *find_node_child(dev_tree_t *, fun_node_t *, const char *); 46 65 47 66 /* hash table operations */ … … 66 85 } 67 86 68 static int devmap_functions_compare(unsigned long key[], hash_count_t keys,87 static int loc_functions_compare(unsigned long key[], hash_count_t keys, 69 88 link_t *item) 70 89 { 71 fun_node_t *fun = hash_table_get_instance(item, fun_node_t, devmap_fun); 72 return (fun->devmap_handle == (devmap_handle_t) key[0]); 73 } 74 75 static int devmap_devices_class_compare(unsigned long key[], hash_count_t keys, 76 link_t *item) 77 { 78 dev_class_info_t *class_info 79 = hash_table_get_instance(item, dev_class_info_t, devmap_link); 80 assert(class_info != NULL); 81 82 return (class_info->devmap_handle == (devmap_handle_t) key[0]); 90 fun_node_t *fun = hash_table_get_instance(item, fun_node_t, loc_fun); 91 return (fun->service_id == (service_id_t) key[0]); 83 92 } 84 93 … … 99 108 }; 100 109 101 static hash_table_operations_t devmap_devices_ops = {110 static hash_table_operations_t loc_devices_ops = { 102 111 .hash = devices_hash, 103 .compare = devmap_functions_compare, 104 .remove_callback = devices_remove_callback 105 }; 106 107 static hash_table_operations_t devmap_devices_class_ops = { 108 .hash = devices_hash, 109 .compare = devmap_devices_class_compare, 112 .compare = loc_functions_compare, 110 113 .remove_callback = devices_remove_callback 111 114 }; … … 422 425 } 423 426 427 fun_add_ref(fun); 424 428 insert_fun_node(tree, fun, str_dup(""), NULL); 429 425 430 match_id_t *id = create_match_id(); 426 431 id->id = str_dup("root"); … … 438 443 } 439 444 445 dev_add_ref(dev); 440 446 insert_dev_node(tree, dev, fun); 441 447 … … 483 489 /** Assign a driver to a device. 484 490 * 491 * @param tree Device tree 485 492 * @param node The device's node in the device tree. 486 493 * @param drv The driver. 487 494 */ 488 void attach_driver(dev_ node_t *dev, driver_t *drv)495 void attach_driver(dev_tree_t *tree, dev_node_t *dev, driver_t *drv) 489 496 { 490 497 log_msg(LVL_DEBUG, "attach_driver(dev=\"%s\",drv=\"%s\")", … … 492 499 493 500 fibril_mutex_lock(&drv->driver_mutex); 501 fibril_rwlock_write_lock(&tree->rwlock); 494 502 495 503 dev->drv = drv; 496 504 list_append(&dev->driver_devices, &drv->devices); 497 505 506 fibril_rwlock_write_unlock(&tree->rwlock); 507 fibril_mutex_unlock(&drv->driver_mutex); 508 } 509 510 /** Detach driver from device. 511 * 512 * @param tree Device tree 513 * @param node The device's node in the device tree. 514 * @param drv The driver. 515 */ 516 void detach_driver(dev_tree_t *tree, dev_node_t *dev) 517 { 518 driver_t *drv = dev->drv; 519 520 assert(drv != NULL); 521 522 log_msg(LVL_DEBUG, "detach_driver(dev=\"%s\",drv=\"%s\")", 523 dev->pfun->pathname, drv->name); 524 525 fibril_mutex_lock(&drv->driver_mutex); 526 fibril_rwlock_write_lock(&tree->rwlock); 527 528 dev->drv = NULL; 529 list_remove(&dev->driver_devices); 530 531 fibril_rwlock_write_unlock(&tree->rwlock); 498 532 fibril_mutex_unlock(&drv->driver_mutex); 499 533 } … … 564 598 565 599 fibril_mutex_lock(&driver->driver_mutex); 566 567 async_exch_t *exch = async_exchange_begin(driver->sess);568 async_sess_t *sess = async_connect_me_to(EXCHANGE_SERIALIZE, exch,569 DRIVER_DEVMAN, 0, 0);570 async_exchange_end(exch);571 572 if (!sess) {573 fibril_mutex_unlock(&driver->driver_mutex);574 return;575 }576 600 577 601 /* … … 582 606 while (link != &driver->devices.head) { 583 607 dev = list_get_instance(link, dev_node_t, driver_devices); 608 fibril_rwlock_write_lock(&tree->rwlock); 609 584 610 if (dev->passed_to_driver) { 611 fibril_rwlock_write_unlock(&tree->rwlock); 585 612 link = link->next; 586 613 continue; 587 614 } 588 615 589 /* 590 * We remove the device from the list to allow safe adding 591 * of new devices (no one will touch our item this way). 592 */ 593 list_remove(link); 616 log_msg(LVL_DEBUG, "pass_devices_to_driver: dev->refcnt=%d\n", 617 (int)atomic_get(&dev->refcnt)); 618 dev_add_ref(dev); 594 619 595 620 /* … … 598 623 */ 599 624 fibril_mutex_unlock(&driver->driver_mutex); 600 601 add_device(sess, driver, dev, tree); 625 fibril_rwlock_write_unlock(&tree->rwlock); 626 627 add_device(driver, dev, tree); 628 629 dev_del_ref(dev); 602 630 603 631 /* … … 608 636 609 637 /* 610 * Insert the device back.611 * The order is not relevant here so no harm is done612 * (actually, the order would be preserved in most cases).613 */614 list_append(link, &driver->devices);615 616 /*617 638 * Restart the cycle to go through all devices again. 618 639 */ 619 640 link = driver->devices.head.next; 620 641 } 621 622 async_hangup(sess);623 642 624 643 /* … … 701 720 } 702 721 703 /** Create devmap path and name for the function. */ 704 void devmap_register_tree_function(fun_node_t *fun, dev_tree_t *tree) 705 { 706 char *devmap_pathname = NULL; 707 char *devmap_name = NULL; 708 709 asprintf(&devmap_name, "%s", fun->pathname); 710 if (devmap_name == NULL) 722 /** Create loc path and name for the function. */ 723 void loc_register_tree_function(fun_node_t *fun, dev_tree_t *tree) 724 { 725 char *loc_pathname = NULL; 726 char *loc_name = NULL; 727 728 assert(fibril_rwlock_is_locked(&tree->rwlock)); 729 730 asprintf(&loc_name, "%s", fun->pathname); 731 if (loc_name == NULL) 711 732 return; 712 733 713 replace_char( devmap_name, '/', DEVMAP_SEPARATOR);714 715 asprintf(& devmap_pathname, "%s/%s", DEVMAP_DEVICE_NAMESPACE,716 devmap_name);717 if ( devmap_pathname == NULL) {718 free( devmap_name);734 replace_char(loc_name, '/', LOC_SEPARATOR); 735 736 asprintf(&loc_pathname, "%s/%s", LOC_DEVICE_NAMESPACE, 737 loc_name); 738 if (loc_pathname == NULL) { 739 free(loc_name); 719 740 return; 720 741 } 721 742 722 devmap_device_register_with_iface(devmap_pathname,723 &fun-> devmap_handle, DEVMAN_CONNECT_FROM_DEVMAP);724 725 tree_add_ devmap_function(tree, fun);726 727 free( devmap_name);728 free( devmap_pathname);743 loc_service_register_with_iface(loc_pathname, 744 &fun->service_id, DEVMAN_CONNECT_FROM_LOC); 745 746 tree_add_loc_function(tree, fun); 747 748 free(loc_name); 749 free(loc_pathname); 729 750 } 730 751 … … 734 755 * @param node The device's node in the device tree. 735 756 */ 736 void add_device(async_sess_t *sess, driver_t *drv, dev_node_t *dev, 737 dev_tree_t *tree) 757 void add_device(driver_t *drv, dev_node_t *dev, dev_tree_t *tree) 738 758 { 739 759 /* … … 752 772 } 753 773 754 async_exch_t *exch = async_exchange_begin( sess);774 async_exch_t *exch = async_exchange_begin(drv->sess); 755 775 756 776 ipc_call_t answer; 757 aid_t req = async_send_2(exch, DRIVER_ ADD_DEVICE, dev->handle,777 aid_t req = async_send_2(exch, DRIVER_DEV_ADD, dev->handle, 758 778 parent_handle, &answer); 759 779 … … 812 832 813 833 /* Attach the driver to the device. */ 814 attach_driver( dev, drv);834 attach_driver(tree, dev, drv); 815 835 816 836 fibril_mutex_lock(&drv->driver_mutex); … … 822 842 fibril_mutex_unlock(&drv->driver_mutex); 823 843 824 if (is_running) { 825 /* Notify the driver about the new device. */ 826 async_exch_t *exch = async_exchange_begin(drv->sess); 827 async_sess_t *sess = async_connect_me_to(EXCHANGE_SERIALIZE, exch, 828 DRIVER_DEVMAN, 0, 0); 829 async_exchange_end(exch); 830 831 if (sess) { 832 add_device(sess, drv, dev, tree); 833 async_hangup(sess); 834 } 835 } 836 844 /* Notify the driver about the new device. */ 845 if (is_running) 846 add_device(drv, dev, tree); 847 848 fibril_mutex_lock(&drv->driver_mutex); 849 fibril_mutex_unlock(&drv->driver_mutex); 850 851 fibril_rwlock_write_lock(&tree->rwlock); 852 if (dev->pfun != NULL) { 853 dev->pfun->state = FUN_ON_LINE; 854 } 855 fibril_rwlock_write_unlock(&tree->rwlock); 837 856 return true; 857 } 858 859 int driver_dev_remove(dev_tree_t *tree, dev_node_t *dev) 860 { 861 async_exch_t *exch; 862 sysarg_t retval; 863 driver_t *drv; 864 devman_handle_t handle; 865 866 assert(dev != NULL); 867 868 log_msg(LVL_DEBUG, "driver_dev_remove(%p)", dev); 869 870 fibril_rwlock_read_lock(&tree->rwlock); 871 drv = dev->drv; 872 handle = dev->handle; 873 fibril_rwlock_read_unlock(&tree->rwlock); 874 875 exch = async_exchange_begin(drv->sess); 876 retval = async_req_1_0(exch, DRIVER_DEV_REMOVE, handle); 877 async_exchange_end(exch); 878 879 return retval; 880 } 881 882 int driver_dev_gone(dev_tree_t *tree, dev_node_t *dev) 883 { 884 async_exch_t *exch; 885 sysarg_t retval; 886 driver_t *drv; 887 devman_handle_t handle; 888 889 assert(dev != NULL); 890 891 log_msg(LVL_DEBUG, "driver_dev_gone(%p)", dev); 892 893 fibril_rwlock_read_lock(&tree->rwlock); 894 drv = dev->drv; 895 handle = dev->handle; 896 fibril_rwlock_read_unlock(&tree->rwlock); 897 898 exch = async_exchange_begin(drv->sess); 899 retval = async_req_1_0(exch, DRIVER_DEV_GONE, handle); 900 async_exchange_end(exch); 901 902 return retval; 903 } 904 905 int driver_fun_online(dev_tree_t *tree, fun_node_t *fun) 906 { 907 async_exch_t *exch; 908 sysarg_t retval; 909 driver_t *drv; 910 devman_handle_t handle; 911 912 log_msg(LVL_DEBUG, "driver_fun_online(%p)", fun); 913 914 fibril_rwlock_read_lock(&tree->rwlock); 915 916 if (fun->dev == NULL) { 917 /* XXX root function? */ 918 fibril_rwlock_read_unlock(&tree->rwlock); 919 return EINVAL; 920 } 921 922 drv = fun->dev->drv; 923 handle = fun->handle; 924 fibril_rwlock_read_unlock(&tree->rwlock); 925 926 exch = async_exchange_begin(drv->sess); 927 retval = async_req_1_0(exch, DRIVER_FUN_ONLINE, handle); 928 loc_exchange_end(exch); 929 930 return retval; 931 } 932 933 int driver_fun_offline(dev_tree_t *tree, fun_node_t *fun) 934 { 935 async_exch_t *exch; 936 sysarg_t retval; 937 driver_t *drv; 938 devman_handle_t handle; 939 940 log_msg(LVL_DEBUG, "driver_fun_offline(%p)", fun); 941 942 fibril_rwlock_read_lock(&tree->rwlock); 943 if (fun->dev == NULL) { 944 /* XXX root function? */ 945 fibril_rwlock_read_unlock(&tree->rwlock); 946 return EINVAL; 947 } 948 949 drv = fun->dev->drv; 950 handle = fun->handle; 951 fibril_rwlock_read_unlock(&tree->rwlock); 952 953 exch = async_exchange_begin(drv->sess); 954 retval = async_req_1_0(exch, DRIVER_FUN_OFFLINE, handle); 955 loc_exchange_end(exch); 956 957 return retval; 958 838 959 } 839 960 … … 856 977 hash_table_create(&tree->devman_functions, DEVICE_BUCKETS, 1, 857 978 &devman_functions_ops); 858 hash_table_create(&tree-> devmap_functions, DEVICE_BUCKETS, 1,859 & devmap_devices_ops);979 hash_table_create(&tree->loc_functions, DEVICE_BUCKETS, 1, 980 &loc_devices_ops); 860 981 861 982 fibril_rwlock_initialize(&tree->rwlock); … … 864 985 if (!create_root_nodes(tree)) 865 986 return false; 866 987 867 988 /* Find suitable driver and start it. */ 868 return assign_driver(tree->root_node->child, drivers_list, tree); 989 dev_node_t *rdev = tree->root_node->child; 990 dev_add_ref(rdev); 991 int rc = assign_driver(rdev, drivers_list, tree); 992 dev_del_ref(rdev); 993 994 return rc; 869 995 } 870 996 … … 877 1003 dev_node_t *create_dev_node(void) 878 1004 { 879 dev_node_t *res = malloc(sizeof(dev_node_t)); 880 881 if (res != NULL) { 882 memset(res, 0, sizeof(dev_node_t)); 883 list_initialize(&res->functions); 884 link_initialize(&res->driver_devices); 885 link_initialize(&res->devman_dev); 886 } 887 888 return res; 1005 dev_node_t *dev; 1006 1007 dev = calloc(1, sizeof(dev_node_t)); 1008 if (dev == NULL) 1009 return NULL; 1010 1011 atomic_set(&dev->refcnt, 0); 1012 list_initialize(&dev->functions); 1013 link_initialize(&dev->driver_devices); 1014 link_initialize(&dev->devman_dev); 1015 1016 return dev; 889 1017 } 890 1018 … … 902 1030 } 903 1031 1032 /** Increase device node reference count. 1033 * 1034 * @param dev Device node 1035 */ 1036 void dev_add_ref(dev_node_t *dev) 1037 { 1038 atomic_inc(&dev->refcnt); 1039 } 1040 1041 /** Decrease device node reference count. 1042 * 1043 * When the count drops to zero the device node is freed. 1044 * 1045 * @param dev Device node 1046 */ 1047 void dev_del_ref(dev_node_t *dev) 1048 { 1049 if (atomic_predec(&dev->refcnt) == 0) 1050 delete_dev_node(dev); 1051 } 1052 1053 904 1054 /** Find the device node structure of the device witch has the specified handle. 905 1055 * … … 931 1081 fibril_rwlock_read_lock(&tree->rwlock); 932 1082 dev = find_dev_node_no_lock(tree, handle); 1083 if (dev != NULL) 1084 dev_add_ref(dev); 1085 933 1086 fibril_rwlock_read_unlock(&tree->rwlock); 934 1087 … … 936 1089 } 937 1090 1091 /** Get list of device functions. */ 1092 int dev_get_functions(dev_tree_t *tree, dev_node_t *dev, 1093 devman_handle_t *hdl_buf, size_t buf_size, size_t *act_size) 1094 { 1095 size_t act_cnt; 1096 size_t buf_cnt; 1097 1098 assert(fibril_rwlock_is_locked(&tree->rwlock)); 1099 1100 buf_cnt = buf_size / sizeof(devman_handle_t); 1101 1102 act_cnt = list_count(&dev->functions); 1103 *act_size = act_cnt * sizeof(devman_handle_t); 1104 1105 if (buf_size % sizeof(devman_handle_t) != 0) 1106 return EINVAL; 1107 1108 size_t pos = 0; 1109 list_foreach(dev->functions, item) { 1110 fun_node_t *fun = 1111 list_get_instance(item, fun_node_t, dev_functions); 1112 1113 if (pos < buf_cnt) { 1114 hdl_buf[pos] = fun->handle; 1115 } 1116 1117 pos++; 1118 } 1119 1120 return EOK; 1121 } 1122 1123 938 1124 /* Function nodes */ 939 1125 … … 944 1130 fun_node_t *create_fun_node(void) 945 1131 { 946 fun_node_t *res = malloc(sizeof(fun_node_t)); 947 948 if (res != NULL) { 949 memset(res, 0, sizeof(fun_node_t)); 950 link_initialize(&res->dev_functions); 951 list_initialize(&res->match_ids.ids); 952 list_initialize(&res->classes); 953 link_initialize(&res->devman_fun); 954 link_initialize(&res->devmap_fun); 955 } 956 957 return res; 1132 fun_node_t *fun; 1133 1134 fun = calloc(1, sizeof(fun_node_t)); 1135 if (fun == NULL) 1136 return NULL; 1137 1138 fun->state = FUN_INIT; 1139 atomic_set(&fun->refcnt, 0); 1140 link_initialize(&fun->dev_functions); 1141 list_initialize(&fun->match_ids.ids); 1142 link_initialize(&fun->devman_fun); 1143 link_initialize(&fun->loc_fun); 1144 1145 return fun; 958 1146 } 959 1147 … … 973 1161 } 974 1162 1163 /** Increase function node reference count. 1164 * 1165 * @param fun Function node 1166 */ 1167 void fun_add_ref(fun_node_t *fun) 1168 { 1169 atomic_inc(&fun->refcnt); 1170 } 1171 1172 /** Decrease function node reference count. 1173 * 1174 * When the count drops to zero the function node is freed. 1175 * 1176 * @param fun Function node 1177 */ 1178 void fun_del_ref(fun_node_t *fun) 1179 { 1180 if (atomic_predec(&fun->refcnt) == 0) 1181 delete_fun_node(fun); 1182 } 1183 975 1184 /** Find the function node with the specified handle. 976 1185 * … … 983 1192 unsigned long key = handle; 984 1193 link_t *link; 1194 fun_node_t *fun; 985 1195 986 1196 assert(fibril_rwlock_is_locked(&tree->rwlock)); … … 990 1200 return NULL; 991 1201 992 return hash_table_get_instance(link, fun_node_t, devman_fun); 1202 fun = hash_table_get_instance(link, fun_node_t, devman_fun); 1203 1204 return fun; 993 1205 } 994 1206 … … 1004 1216 1005 1217 fibril_rwlock_read_lock(&tree->rwlock); 1218 1006 1219 fun = find_fun_node_no_lock(tree, handle); 1220 if (fun != NULL) 1221 fun_add_ref(fun); 1222 1007 1223 fibril_rwlock_read_unlock(&tree->rwlock); 1008 1224 … … 1012 1228 /** Create and set device's full path in device tree. 1013 1229 * 1230 * @param tree Device tree 1014 1231 * @param node The device's device node. 1015 1232 * @param parent The parent device node. … … 1017 1234 * resources etc.). 1018 1235 */ 1019 static bool set_fun_path(fun_node_t *fun, fun_node_t *parent) 1020 { 1236 static bool set_fun_path(dev_tree_t *tree, fun_node_t *fun, fun_node_t *parent) 1237 { 1238 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); 1021 1239 assert(fun->name != NULL); 1022 1240 … … 1045 1263 * 1046 1264 * @param tree The device tree. 1047 * @param node The newly added device node. 1048 * @param dev_name The name of the newly added device. 1049 * @param parent The parent device node. 1265 * @param dev The newly added device node. 1266 * @param pfun The parent function node. 1050 1267 * 1051 1268 * @return True on success, false otherwise (insufficient resources … … 1054 1271 bool insert_dev_node(dev_tree_t *tree, dev_node_t *dev, fun_node_t *pfun) 1055 1272 { 1056 assert(dev != NULL);1057 assert(tree != NULL);1058 1273 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); 1059 1274 … … 1073 1288 } 1074 1289 1290 /** Remove device from device tree. 1291 * 1292 * @param tree Device tree 1293 * @param dev Device node 1294 */ 1295 void remove_dev_node(dev_tree_t *tree, dev_node_t *dev) 1296 { 1297 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); 1298 1299 log_msg(LVL_DEBUG, "remove_dev_node(dev=%p)", dev); 1300 1301 /* Remove node from the handle-to-node map. */ 1302 unsigned long key = dev->handle; 1303 hash_table_remove(&tree->devman_devices, &key, 1); 1304 1305 /* Unlink from parent function. */ 1306 dev->pfun->child = NULL; 1307 dev->pfun = NULL; 1308 1309 dev->state = DEVICE_REMOVED; 1310 } 1311 1312 1075 1313 /** Insert new function into device tree. 1076 1314 * 1077 1315 * @param tree The device tree. 1078 * @param nodeThe newly added function node.1079 * @param dev_name The name of the newly added function.1080 * @param parentOwning device node.1316 * @param fun The newly added function node. 1317 * @param fun_name The name of the newly added function. 1318 * @param dev Owning device node. 1081 1319 * 1082 1320 * @return True on success, false otherwise (insufficient resources … … 1088 1326 fun_node_t *pfun; 1089 1327 1090 assert(fun != NULL);1091 assert(tree != NULL);1092 1328 assert(fun_name != NULL); 1093 1329 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); … … 1100 1336 1101 1337 fun->name = fun_name; 1102 if (!set_fun_path( fun, pfun)) {1338 if (!set_fun_path(tree, fun, pfun)) { 1103 1339 return false; 1104 1340 } … … 1115 1351 1116 1352 return true; 1353 } 1354 1355 /** Remove function from device tree. 1356 * 1357 * @param tree Device tree 1358 * @param node Function node to remove 1359 */ 1360 void remove_fun_node(dev_tree_t *tree, fun_node_t *fun) 1361 { 1362 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); 1363 1364 /* Remove the node from the handle-to-node map. */ 1365 unsigned long key = fun->handle; 1366 hash_table_remove(&tree->devman_functions, &key, 1); 1367 1368 /* Remove the node from the list of its parent's children. */ 1369 if (fun->dev != NULL) 1370 list_remove(&fun->dev_functions); 1371 1372 fun->dev = NULL; 1373 fun->state = FUN_REMOVED; 1117 1374 } 1118 1375 … … 1136 1393 1137 1394 fun_node_t *fun = tree->root_node; 1395 fun_add_ref(fun); 1138 1396 /* 1139 1397 * Relative path to the function from its parent (but with '/' at the … … 1142 1400 char *rel_path = path; 1143 1401 char *next_path_elem = NULL; 1144 bool cont = true;1402 bool cont = (rel_path[1] != '\0'); 1145 1403 1146 1404 while (cont && fun != NULL) { … … 1153 1411 } 1154 1412 1155 fun = find_node_child(fun, rel_path + 1); 1413 fun_node_t *cfun = find_node_child(tree, fun, rel_path + 1); 1414 fun_del_ref(fun); 1415 fun = cfun; 1156 1416 1157 1417 if (cont) { … … 1171 1431 * Device tree rwlock should be held at least for reading. 1172 1432 * 1433 * @param tree Device tree 1173 1434 * @param dev Device the function belongs to. 1174 1435 * @param name Function name (not path). … … 1176 1437 * @retval NULL No function with given name. 1177 1438 */ 1178 fun_node_t *find_fun_node_in_device(dev_ node_t *dev, const char *name)1179 { 1180 assert(dev != NULL); 1439 fun_node_t *find_fun_node_in_device(dev_tree_t *tree, dev_node_t *dev, 1440 const char *name) 1441 { 1181 1442 assert(name != NULL); 1443 assert(fibril_rwlock_is_locked(&tree->rwlock)); 1182 1444 1183 1445 fun_node_t *fun; … … 1186 1448 fun = list_get_instance(link, fun_node_t, dev_functions); 1187 1449 1188 if (str_cmp(name, fun->name) == 0) 1450 if (str_cmp(name, fun->name) == 0) { 1451 fun_add_ref(fun); 1189 1452 return fun; 1453 } 1190 1454 } 1191 1455 … … 1193 1457 } 1194 1458 1195 /** Find function node by its class name and index. */1196 fun_node_t *find_fun_node_by_class(class_list_t *class_list,1197 const char *class_name, const char *dev_name)1198 {1199 assert(class_list != NULL);1200 assert(class_name != NULL);1201 assert(dev_name != NULL);1202 1203 fibril_rwlock_read_lock(&class_list->rwlock);1204 1205 dev_class_t *cl = find_dev_class_no_lock(class_list, class_name);1206 if (cl == NULL) {1207 fibril_rwlock_read_unlock(&class_list->rwlock);1208 return NULL;1209 }1210 1211 dev_class_info_t *dev = find_dev_in_class(cl, dev_name);1212 if (dev == NULL) {1213 fibril_rwlock_read_unlock(&class_list->rwlock);1214 return NULL;1215 }1216 1217 fun_node_t *fun = dev->fun;1218 1219 fibril_rwlock_read_unlock(&class_list->rwlock);1220 1221 return fun;1222 }1223 1224 1225 1459 /** Find child function node with a specified name. 1226 1460 * 1227 1461 * Device tree rwlock should be held at least for reading. 1228 1462 * 1463 * @param tree Device tree 1229 1464 * @param parent The parent function node. 1230 1465 * @param name The name of the child function. 1231 1466 * @return The child function node. 1232 1467 */ 1233 fun_node_t *find_node_child(fun_node_t *pfun, const char *name) 1234 { 1235 return find_fun_node_in_device(pfun->child, name); 1236 } 1237 1238 /* Device classes */ 1239 1240 /** Create device class. 1241 * 1242 * @return Device class. 1243 */ 1244 dev_class_t *create_dev_class(void) 1245 { 1246 dev_class_t *cl; 1247 1248 cl = (dev_class_t *) malloc(sizeof(dev_class_t)); 1249 if (cl != NULL) { 1250 memset(cl, 0, sizeof(dev_class_t)); 1251 list_initialize(&cl->devices); 1252 fibril_mutex_initialize(&cl->mutex); 1253 } 1254 1255 return cl; 1256 } 1257 1258 /** Create device class info. 1259 * 1260 * @return Device class info. 1261 */ 1262 dev_class_info_t *create_dev_class_info(void) 1263 { 1264 dev_class_info_t *info; 1265 1266 info = (dev_class_info_t *) malloc(sizeof(dev_class_info_t)); 1267 if (info != NULL) { 1268 memset(info, 0, sizeof(dev_class_info_t)); 1269 link_initialize(&info->dev_classes); 1270 link_initialize(&info->devmap_link); 1271 link_initialize(&info->link); 1272 } 1273 1274 return info; 1275 } 1276 1277 size_t get_new_class_dev_idx(dev_class_t *cl) 1278 { 1279 size_t dev_idx; 1280 1281 fibril_mutex_lock(&cl->mutex); 1282 dev_idx = ++cl->curr_dev_idx; 1283 fibril_mutex_unlock(&cl->mutex); 1284 1285 return dev_idx; 1286 } 1287 1288 1289 /** Create unique device name within the class. 1290 * 1291 * @param cl The class. 1292 * @param base_dev_name Contains the base name for the device if it was 1293 * specified by the driver when it registered the device by 1294 * the class; NULL if driver specified no base name. 1295 * @return The unique name for the device within the class. 1296 */ 1297 char *create_dev_name_for_class(dev_class_t *cl, const char *base_dev_name) 1298 { 1299 char *dev_name; 1300 const char *base_name; 1301 1302 if (base_dev_name != NULL) 1303 base_name = base_dev_name; 1304 else 1305 base_name = cl->base_dev_name; 1306 1307 size_t idx = get_new_class_dev_idx(cl); 1308 asprintf(&dev_name, "%s%zu", base_name, idx); 1309 1310 return dev_name; 1311 } 1312 1313 /** Add the device function to the class. 1314 * 1315 * The device may be added to multiple classes and a class may contain multiple 1316 * devices. The class and the device are associated with each other by the 1317 * dev_class_info_t structure. 1318 * 1319 * @param dev The device. 1320 * @param class The class. 1321 * @param base_dev_name The base name of the device within the class if 1322 * specified by the driver, NULL otherwise. 1323 * @return dev_class_info_t structure which associates the device 1324 * with the class. 1325 */ 1326 dev_class_info_t *add_function_to_class(fun_node_t *fun, dev_class_t *cl, 1327 const char *base_dev_name) 1328 { 1329 dev_class_info_t *info; 1330 1331 assert(fun != NULL); 1332 assert(cl != NULL); 1333 1334 info = create_dev_class_info(); 1335 1336 1337 if (info != NULL) { 1338 info->dev_class = cl; 1339 info->fun = fun; 1340 1341 /* Add the device to the class. */ 1342 fibril_mutex_lock(&cl->mutex); 1343 list_append(&info->link, &cl->devices); 1344 fibril_mutex_unlock(&cl->mutex); 1345 1346 /* Add the class to the device. */ 1347 list_append(&info->dev_classes, &fun->classes); 1348 1349 /* Create unique name for the device within the class. */ 1350 info->dev_name = create_dev_name_for_class(cl, base_dev_name); 1351 } 1352 1353 return info; 1354 } 1355 1356 dev_class_t *get_dev_class(class_list_t *class_list, char *class_name) 1357 { 1358 dev_class_t *cl; 1359 1360 fibril_rwlock_write_lock(&class_list->rwlock); 1361 cl = find_dev_class_no_lock(class_list, class_name); 1362 if (cl == NULL) { 1363 cl = create_dev_class(); 1364 if (cl != NULL) { 1365 cl->name = class_name; 1366 cl->base_dev_name = ""; 1367 add_dev_class_no_lock(class_list, cl); 1368 } 1369 } 1370 1371 fibril_rwlock_write_unlock(&class_list->rwlock); 1372 return cl; 1373 } 1374 1375 dev_class_t *find_dev_class_no_lock(class_list_t *class_list, 1376 const char *class_name) 1377 { 1378 dev_class_t *cl; 1379 1380 list_foreach(class_list->classes, link) { 1381 cl = list_get_instance(link, dev_class_t, link); 1382 if (str_cmp(cl->name, class_name) == 0) { 1383 return cl; 1384 } 1385 } 1386 1387 return NULL; 1388 } 1389 1390 void add_dev_class_no_lock(class_list_t *class_list, dev_class_t *cl) 1391 { 1392 list_append(&cl->link, &class_list->classes); 1393 } 1394 1395 dev_class_info_t *find_dev_in_class(dev_class_t *dev_class, const char *dev_name) 1396 { 1397 assert(dev_class != NULL); 1398 assert(dev_name != NULL); 1399 1400 list_foreach(dev_class->devices, link) { 1401 dev_class_info_t *dev = list_get_instance(link, 1402 dev_class_info_t, link); 1403 1404 if (str_cmp(dev->dev_name, dev_name) == 0) { 1405 return dev; 1406 } 1407 } 1408 1409 return NULL; 1410 } 1411 1412 void init_class_list(class_list_t *class_list) 1413 { 1414 list_initialize(&class_list->classes); 1415 fibril_rwlock_initialize(&class_list->rwlock); 1416 hash_table_create(&class_list->devmap_functions, DEVICE_BUCKETS, 1, 1417 &devmap_devices_class_ops); 1418 } 1419 1420 1421 /* Devmap devices */ 1422 1423 fun_node_t *find_devmap_tree_function(dev_tree_t *tree, devmap_handle_t devmap_handle) 1468 static fun_node_t *find_node_child(dev_tree_t *tree, fun_node_t *pfun, 1469 const char *name) 1470 { 1471 return find_fun_node_in_device(tree, pfun->child, name); 1472 } 1473 1474 /* loc devices */ 1475 1476 fun_node_t *find_loc_tree_function(dev_tree_t *tree, service_id_t service_id) 1424 1477 { 1425 1478 fun_node_t *fun = NULL; 1426 1479 link_t *link; 1427 unsigned long key = (unsigned long) devmap_handle;1480 unsigned long key = (unsigned long) service_id; 1428 1481 1429 1482 fibril_rwlock_read_lock(&tree->rwlock); 1430 link = hash_table_find(&tree->devmap_functions, &key); 1431 if (link != NULL) 1432 fun = hash_table_get_instance(link, fun_node_t, devmap_fun); 1483 link = hash_table_find(&tree->loc_functions, &key); 1484 if (link != NULL) { 1485 fun = hash_table_get_instance(link, fun_node_t, loc_fun); 1486 fun_add_ref(fun); 1487 } 1433 1488 fibril_rwlock_read_unlock(&tree->rwlock); 1434 1489 … … 1436 1491 } 1437 1492 1438 fun_node_t *find_devmap_class_function(class_list_t *classes, 1439 devmap_handle_t devmap_handle) 1440 { 1441 fun_node_t *fun = NULL; 1442 dev_class_info_t *cli; 1443 link_t *link; 1444 unsigned long key = (unsigned long)devmap_handle; 1445 1446 fibril_rwlock_read_lock(&classes->rwlock); 1447 link = hash_table_find(&classes->devmap_functions, &key); 1448 if (link != NULL) { 1449 cli = hash_table_get_instance(link, dev_class_info_t, 1450 devmap_link); 1451 fun = cli->fun; 1452 } 1453 fibril_rwlock_read_unlock(&classes->rwlock); 1454 1455 return fun; 1456 } 1457 1458 void class_add_devmap_function(class_list_t *class_list, dev_class_info_t *cli) 1459 { 1460 unsigned long key = (unsigned long) cli->devmap_handle; 1461 1462 fibril_rwlock_write_lock(&class_list->rwlock); 1463 hash_table_insert(&class_list->devmap_functions, &key, &cli->devmap_link); 1464 fibril_rwlock_write_unlock(&class_list->rwlock); 1465 1466 assert(find_devmap_class_function(class_list, cli->devmap_handle) != NULL); 1467 } 1468 1469 void tree_add_devmap_function(dev_tree_t *tree, fun_node_t *fun) 1470 { 1471 unsigned long key = (unsigned long) fun->devmap_handle; 1472 fibril_rwlock_write_lock(&tree->rwlock); 1473 hash_table_insert(&tree->devmap_functions, &key, &fun->devmap_fun); 1474 fibril_rwlock_write_unlock(&tree->rwlock); 1493 void tree_add_loc_function(dev_tree_t *tree, fun_node_t *fun) 1494 { 1495 assert(fibril_rwlock_is_write_locked(&tree->rwlock)); 1496 1497 unsigned long key = (unsigned long) fun->service_id; 1498 hash_table_insert(&tree->loc_functions, &key, &fun->loc_fun); 1475 1499 } 1476 1500
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