1c7fdb240SAbhyuday Godhasara // SPDX-License-Identifier: GPL-2.0 2c7fdb240SAbhyuday Godhasara /* 3c7fdb240SAbhyuday Godhasara * Xilinx Event Management Driver 4c7fdb240SAbhyuday Godhasara * 5c7fdb240SAbhyuday Godhasara * Copyright (C) 2021 Xilinx, Inc. 6c7fdb240SAbhyuday Godhasara * 7c7fdb240SAbhyuday Godhasara * Abhyuday Godhasara <abhyuday.godhasara@xilinx.com> 8c7fdb240SAbhyuday Godhasara */ 9c7fdb240SAbhyuday Godhasara 10c7fdb240SAbhyuday Godhasara #include <linux/cpuhotplug.h> 11c7fdb240SAbhyuday Godhasara #include <linux/firmware/xlnx-event-manager.h> 12c7fdb240SAbhyuday Godhasara #include <linux/firmware/xlnx-zynqmp.h> 13c7fdb240SAbhyuday Godhasara #include <linux/hashtable.h> 14c7fdb240SAbhyuday Godhasara #include <linux/interrupt.h> 15c7fdb240SAbhyuday Godhasara #include <linux/irq.h> 16c7fdb240SAbhyuday Godhasara #include <linux/irqdomain.h> 17c7fdb240SAbhyuday Godhasara #include <linux/module.h> 18c7fdb240SAbhyuday Godhasara #include <linux/of_irq.h> 19c7fdb240SAbhyuday Godhasara #include <linux/platform_device.h> 20c7fdb240SAbhyuday Godhasara #include <linux/slab.h> 21c7fdb240SAbhyuday Godhasara 22c7fdb240SAbhyuday Godhasara static DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number1); 23c7fdb240SAbhyuday Godhasara 24c7fdb240SAbhyuday Godhasara static int virq_sgi; 25c7fdb240SAbhyuday Godhasara static int event_manager_availability = -EACCES; 26c7fdb240SAbhyuday Godhasara 27c7fdb240SAbhyuday Godhasara /* SGI number used for Event management driver */ 28c7fdb240SAbhyuday Godhasara #define XLNX_EVENT_SGI_NUM (15) 29c7fdb240SAbhyuday Godhasara 30c7fdb240SAbhyuday Godhasara /* Max number of driver can register for same event */ 31c7fdb240SAbhyuday Godhasara #define MAX_DRIVER_PER_EVENT (10U) 32c7fdb240SAbhyuday Godhasara 33c7fdb240SAbhyuday Godhasara /* Max HashMap Order for PM API feature check (1<<7 = 128) */ 34c7fdb240SAbhyuday Godhasara #define REGISTERED_DRIVER_MAX_ORDER (7) 35c7fdb240SAbhyuday Godhasara 36c7fdb240SAbhyuday Godhasara #define MAX_BITS (32U) /* Number of bits available for error mask */ 37c7fdb240SAbhyuday Godhasara 38c7fdb240SAbhyuday Godhasara #define FIRMWARE_VERSION_MASK (0xFFFFU) 39c7fdb240SAbhyuday Godhasara #define REGISTER_NOTIFIER_FIRMWARE_VERSION (2U) 40c7fdb240SAbhyuday Godhasara 41c7fdb240SAbhyuday Godhasara static DEFINE_HASHTABLE(reg_driver_map, REGISTERED_DRIVER_MAX_ORDER); 42c7fdb240SAbhyuday Godhasara static int sgi_num = XLNX_EVENT_SGI_NUM; 43c7fdb240SAbhyuday Godhasara 44e6d3c99aSAbhyuday Godhasara static bool is_need_to_unregister; 45e6d3c99aSAbhyuday Godhasara 46c7fdb240SAbhyuday Godhasara /** 4705e5ba40SAbhyuday Godhasara * struct agent_cb - Registered callback function and private data. 4805e5ba40SAbhyuday Godhasara * @agent_data: Data passed back to handler function. 4905e5ba40SAbhyuday Godhasara * @eve_cb: Function pointer to store the callback function. 5005e5ba40SAbhyuday Godhasara * @list: member to create list. 5105e5ba40SAbhyuday Godhasara */ 5205e5ba40SAbhyuday Godhasara struct agent_cb { 5305e5ba40SAbhyuday Godhasara void *agent_data; 5405e5ba40SAbhyuday Godhasara event_cb_func_t eve_cb; 5505e5ba40SAbhyuday Godhasara struct list_head list; 5605e5ba40SAbhyuday Godhasara }; 5705e5ba40SAbhyuday Godhasara 5805e5ba40SAbhyuday Godhasara /** 59c7fdb240SAbhyuday Godhasara * struct registered_event_data - Registered Event Data. 60c7fdb240SAbhyuday Godhasara * @key: key is the combine id(Node-Id | Event-Id) of type u64 61c7fdb240SAbhyuday Godhasara * where upper u32 for Node-Id and lower u32 for Event-Id, 62c7fdb240SAbhyuday Godhasara * And this used as key to index into hashmap. 63c7fdb240SAbhyuday Godhasara * @cb_type: Type of Api callback, like PM_NOTIFY_CB, etc. 64c7fdb240SAbhyuday Godhasara * @wake: If this flag set, firmware will wake up processor if is 65c7fdb240SAbhyuday Godhasara * in sleep or power down state. 6605e5ba40SAbhyuday Godhasara * @cb_list_head: Head of call back data list which contain the information 6705e5ba40SAbhyuday Godhasara * about registered handler and private data. 68c7fdb240SAbhyuday Godhasara * @hentry: hlist_node that hooks this entry into hashtable. 69c7fdb240SAbhyuday Godhasara */ 70c7fdb240SAbhyuday Godhasara struct registered_event_data { 71c7fdb240SAbhyuday Godhasara u64 key; 72c7fdb240SAbhyuday Godhasara enum pm_api_cb_id cb_type; 73c7fdb240SAbhyuday Godhasara bool wake; 7405e5ba40SAbhyuday Godhasara struct list_head cb_list_head; 75c7fdb240SAbhyuday Godhasara struct hlist_node hentry; 76c7fdb240SAbhyuday Godhasara }; 77c7fdb240SAbhyuday Godhasara 78c7fdb240SAbhyuday Godhasara static bool xlnx_is_error_event(const u32 node_id) 79c7fdb240SAbhyuday Godhasara { 80c7fdb240SAbhyuday Godhasara if (node_id == EVENT_ERROR_PMC_ERR1 || 81c7fdb240SAbhyuday Godhasara node_id == EVENT_ERROR_PMC_ERR2 || 82c7fdb240SAbhyuday Godhasara node_id == EVENT_ERROR_PSM_ERR1 || 83c7fdb240SAbhyuday Godhasara node_id == EVENT_ERROR_PSM_ERR2) 84c7fdb240SAbhyuday Godhasara return true; 85c7fdb240SAbhyuday Godhasara 86c7fdb240SAbhyuday Godhasara return false; 87c7fdb240SAbhyuday Godhasara } 88c7fdb240SAbhyuday Godhasara 89c7fdb240SAbhyuday Godhasara static int xlnx_add_cb_for_notify_event(const u32 node_id, const u32 event, const bool wake, 90c7fdb240SAbhyuday Godhasara event_cb_func_t cb_fun, void *data) 91c7fdb240SAbhyuday Godhasara { 92c7fdb240SAbhyuday Godhasara u64 key = 0; 9305e5ba40SAbhyuday Godhasara bool present_in_hash = false; 94c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 9505e5ba40SAbhyuday Godhasara struct agent_cb *cb_data; 9605e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 9705e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 98c7fdb240SAbhyuday Godhasara 99c7fdb240SAbhyuday Godhasara key = ((u64)node_id << 32U) | (u64)event; 100c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given key id */ 101c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, key) { 102c7fdb240SAbhyuday Godhasara if (eve_data->key == key) { 10305e5ba40SAbhyuday Godhasara present_in_hash = true; 10405e5ba40SAbhyuday Godhasara break; 105c7fdb240SAbhyuday Godhasara } 106c7fdb240SAbhyuday Godhasara } 107c7fdb240SAbhyuday Godhasara 10805e5ba40SAbhyuday Godhasara if (!present_in_hash) { 10905e5ba40SAbhyuday Godhasara /* Add new entry if not present in HASH table */ 110c7fdb240SAbhyuday Godhasara eve_data = kmalloc(sizeof(*eve_data), GFP_KERNEL); 111c7fdb240SAbhyuday Godhasara if (!eve_data) 112c7fdb240SAbhyuday Godhasara return -ENOMEM; 113c7fdb240SAbhyuday Godhasara eve_data->key = key; 114c7fdb240SAbhyuday Godhasara eve_data->cb_type = PM_NOTIFY_CB; 115c7fdb240SAbhyuday Godhasara eve_data->wake = wake; 11605e5ba40SAbhyuday Godhasara INIT_LIST_HEAD(&eve_data->cb_list_head); 117c7fdb240SAbhyuday Godhasara 11805e5ba40SAbhyuday Godhasara cb_data = kmalloc(sizeof(*cb_data), GFP_KERNEL); 119*1bea5349SGaosheng Cui if (!cb_data) { 120*1bea5349SGaosheng Cui kfree(eve_data); 12105e5ba40SAbhyuday Godhasara return -ENOMEM; 122*1bea5349SGaosheng Cui } 12305e5ba40SAbhyuday Godhasara cb_data->eve_cb = cb_fun; 12405e5ba40SAbhyuday Godhasara cb_data->agent_data = data; 12505e5ba40SAbhyuday Godhasara 12605e5ba40SAbhyuday Godhasara /* Add into callback list */ 12705e5ba40SAbhyuday Godhasara list_add(&cb_data->list, &eve_data->cb_list_head); 12805e5ba40SAbhyuday Godhasara 12905e5ba40SAbhyuday Godhasara /* Add into HASH table */ 130c7fdb240SAbhyuday Godhasara hash_add(reg_driver_map, &eve_data->hentry, key); 13105e5ba40SAbhyuday Godhasara } else { 13205e5ba40SAbhyuday Godhasara /* Search for callback function and private data in list */ 13305e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 13405e5ba40SAbhyuday Godhasara if (cb_pos->eve_cb == cb_fun && 13505e5ba40SAbhyuday Godhasara cb_pos->agent_data == data) { 13605e5ba40SAbhyuday Godhasara return 0; 13705e5ba40SAbhyuday Godhasara } 13805e5ba40SAbhyuday Godhasara } 13905e5ba40SAbhyuday Godhasara 14005e5ba40SAbhyuday Godhasara /* Add multiple handler and private data in list */ 14105e5ba40SAbhyuday Godhasara cb_data = kmalloc(sizeof(*cb_data), GFP_KERNEL); 14205e5ba40SAbhyuday Godhasara if (!cb_data) 14305e5ba40SAbhyuday Godhasara return -ENOMEM; 14405e5ba40SAbhyuday Godhasara cb_data->eve_cb = cb_fun; 14505e5ba40SAbhyuday Godhasara cb_data->agent_data = data; 14605e5ba40SAbhyuday Godhasara 14705e5ba40SAbhyuday Godhasara list_add(&cb_data->list, &eve_data->cb_list_head); 14805e5ba40SAbhyuday Godhasara } 149c7fdb240SAbhyuday Godhasara 150c7fdb240SAbhyuday Godhasara return 0; 151c7fdb240SAbhyuday Godhasara } 152c7fdb240SAbhyuday Godhasara 153c7fdb240SAbhyuday Godhasara static int xlnx_add_cb_for_suspend(event_cb_func_t cb_fun, void *data) 154c7fdb240SAbhyuday Godhasara { 155c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 15605e5ba40SAbhyuday Godhasara struct agent_cb *cb_data; 157c7fdb240SAbhyuday Godhasara 158c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given cb_type */ 159c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, PM_INIT_SUSPEND_CB) { 160c7fdb240SAbhyuday Godhasara if (eve_data->cb_type == PM_INIT_SUSPEND_CB) { 161c7fdb240SAbhyuday Godhasara pr_err("Found as already registered\n"); 162c7fdb240SAbhyuday Godhasara return -EINVAL; 163c7fdb240SAbhyuday Godhasara } 164c7fdb240SAbhyuday Godhasara } 165c7fdb240SAbhyuday Godhasara 166c7fdb240SAbhyuday Godhasara /* Add new entry if not present */ 167c7fdb240SAbhyuday Godhasara eve_data = kmalloc(sizeof(*eve_data), GFP_KERNEL); 168c7fdb240SAbhyuday Godhasara if (!eve_data) 169c7fdb240SAbhyuday Godhasara return -ENOMEM; 170c7fdb240SAbhyuday Godhasara 171c7fdb240SAbhyuday Godhasara eve_data->key = 0; 172c7fdb240SAbhyuday Godhasara eve_data->cb_type = PM_INIT_SUSPEND_CB; 17305e5ba40SAbhyuday Godhasara INIT_LIST_HEAD(&eve_data->cb_list_head); 17405e5ba40SAbhyuday Godhasara 17505e5ba40SAbhyuday Godhasara cb_data = kmalloc(sizeof(*cb_data), GFP_KERNEL); 17605e5ba40SAbhyuday Godhasara if (!cb_data) 17705e5ba40SAbhyuday Godhasara return -ENOMEM; 17805e5ba40SAbhyuday Godhasara cb_data->eve_cb = cb_fun; 17905e5ba40SAbhyuday Godhasara cb_data->agent_data = data; 18005e5ba40SAbhyuday Godhasara 18105e5ba40SAbhyuday Godhasara /* Add into callback list */ 18205e5ba40SAbhyuday Godhasara list_add(&cb_data->list, &eve_data->cb_list_head); 183c7fdb240SAbhyuday Godhasara 184c7fdb240SAbhyuday Godhasara hash_add(reg_driver_map, &eve_data->hentry, PM_INIT_SUSPEND_CB); 185c7fdb240SAbhyuday Godhasara 186c7fdb240SAbhyuday Godhasara return 0; 187c7fdb240SAbhyuday Godhasara } 188c7fdb240SAbhyuday Godhasara 189c7fdb240SAbhyuday Godhasara static int xlnx_remove_cb_for_suspend(event_cb_func_t cb_fun) 190c7fdb240SAbhyuday Godhasara { 191c7fdb240SAbhyuday Godhasara bool is_callback_found = false; 192c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 19305e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 19405e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 195c7fdb240SAbhyuday Godhasara 196e6d3c99aSAbhyuday Godhasara is_need_to_unregister = false; 197e6d3c99aSAbhyuday Godhasara 198c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given cb_type */ 199c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, PM_INIT_SUSPEND_CB) { 20005e5ba40SAbhyuday Godhasara if (eve_data->cb_type == PM_INIT_SUSPEND_CB) { 20105e5ba40SAbhyuday Godhasara /* Delete the list of callback */ 20205e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 20305e5ba40SAbhyuday Godhasara if (cb_pos->eve_cb == cb_fun) { 204c7fdb240SAbhyuday Godhasara is_callback_found = true; 20505e5ba40SAbhyuday Godhasara list_del_init(&cb_pos->list); 20605e5ba40SAbhyuday Godhasara kfree(cb_pos); 20705e5ba40SAbhyuday Godhasara } 20805e5ba40SAbhyuday Godhasara } 209c7fdb240SAbhyuday Godhasara /* remove an object from a hashtable */ 210c7fdb240SAbhyuday Godhasara hash_del(&eve_data->hentry); 211c7fdb240SAbhyuday Godhasara kfree(eve_data); 212e6d3c99aSAbhyuday Godhasara is_need_to_unregister = true; 213c7fdb240SAbhyuday Godhasara } 214c7fdb240SAbhyuday Godhasara } 215c7fdb240SAbhyuday Godhasara if (!is_callback_found) { 216c7fdb240SAbhyuday Godhasara pr_warn("Didn't find any registered callback for suspend event\n"); 217c7fdb240SAbhyuday Godhasara return -EINVAL; 218c7fdb240SAbhyuday Godhasara } 219c7fdb240SAbhyuday Godhasara 220c7fdb240SAbhyuday Godhasara return 0; 221c7fdb240SAbhyuday Godhasara } 222c7fdb240SAbhyuday Godhasara 223c7fdb240SAbhyuday Godhasara static int xlnx_remove_cb_for_notify_event(const u32 node_id, const u32 event, 224e6d3c99aSAbhyuday Godhasara event_cb_func_t cb_fun, void *data) 225c7fdb240SAbhyuday Godhasara { 226c7fdb240SAbhyuday Godhasara bool is_callback_found = false; 227c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 228c7fdb240SAbhyuday Godhasara u64 key = ((u64)node_id << 32U) | (u64)event; 22905e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 23005e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 231c7fdb240SAbhyuday Godhasara 232e6d3c99aSAbhyuday Godhasara is_need_to_unregister = false; 233e6d3c99aSAbhyuday Godhasara 234c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given key id */ 235c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, key) { 23605e5ba40SAbhyuday Godhasara if (eve_data->key == key) { 23705e5ba40SAbhyuday Godhasara /* Delete the list of callback */ 23805e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 239e6d3c99aSAbhyuday Godhasara if (cb_pos->eve_cb == cb_fun && 240e6d3c99aSAbhyuday Godhasara cb_pos->agent_data == data) { 241c7fdb240SAbhyuday Godhasara is_callback_found = true; 24205e5ba40SAbhyuday Godhasara list_del_init(&cb_pos->list); 24305e5ba40SAbhyuday Godhasara kfree(cb_pos); 24405e5ba40SAbhyuday Godhasara } 24505e5ba40SAbhyuday Godhasara } 246e6d3c99aSAbhyuday Godhasara 247e6d3c99aSAbhyuday Godhasara /* Remove HASH table if callback list is empty */ 248e6d3c99aSAbhyuday Godhasara if (list_empty(&eve_data->cb_list_head)) { 24905e5ba40SAbhyuday Godhasara /* remove an object from a HASH table */ 250c7fdb240SAbhyuday Godhasara hash_del(&eve_data->hentry); 251c7fdb240SAbhyuday Godhasara kfree(eve_data); 252e6d3c99aSAbhyuday Godhasara is_need_to_unregister = true; 253e6d3c99aSAbhyuday Godhasara } 254c7fdb240SAbhyuday Godhasara } 255c7fdb240SAbhyuday Godhasara } 256c7fdb240SAbhyuday Godhasara if (!is_callback_found) { 257c7fdb240SAbhyuday Godhasara pr_warn("Didn't find any registered callback for 0x%x 0x%x\n", 258c7fdb240SAbhyuday Godhasara node_id, event); 259c7fdb240SAbhyuday Godhasara return -EINVAL; 260c7fdb240SAbhyuday Godhasara } 261c7fdb240SAbhyuday Godhasara 262c7fdb240SAbhyuday Godhasara return 0; 263c7fdb240SAbhyuday Godhasara } 264c7fdb240SAbhyuday Godhasara 265c7fdb240SAbhyuday Godhasara /** 266c7fdb240SAbhyuday Godhasara * xlnx_register_event() - Register for the event. 267c7fdb240SAbhyuday Godhasara * @cb_type: Type of callback from pm_api_cb_id, 268c7fdb240SAbhyuday Godhasara * PM_NOTIFY_CB - for Error Events, 269c7fdb240SAbhyuday Godhasara * PM_INIT_SUSPEND_CB - for suspend callback. 270c7fdb240SAbhyuday Godhasara * @node_id: Node-Id related to event. 271c7fdb240SAbhyuday Godhasara * @event: Event Mask for the Error Event. 272c7fdb240SAbhyuday Godhasara * @wake: Flag specifying whether the subsystem should be woken upon 273c7fdb240SAbhyuday Godhasara * event notification. 274c7fdb240SAbhyuday Godhasara * @cb_fun: Function pointer to store the callback function. 275c7fdb240SAbhyuday Godhasara * @data: Pointer for the driver instance. 276c7fdb240SAbhyuday Godhasara * 277c7fdb240SAbhyuday Godhasara * Return: Returns 0 on successful registration else error code. 278c7fdb240SAbhyuday Godhasara */ 279c7fdb240SAbhyuday Godhasara int xlnx_register_event(const enum pm_api_cb_id cb_type, const u32 node_id, const u32 event, 280c7fdb240SAbhyuday Godhasara const bool wake, event_cb_func_t cb_fun, void *data) 281c7fdb240SAbhyuday Godhasara { 282c7fdb240SAbhyuday Godhasara int ret = 0; 283c7fdb240SAbhyuday Godhasara u32 eve; 284c7fdb240SAbhyuday Godhasara int pos; 285c7fdb240SAbhyuday Godhasara 286c7fdb240SAbhyuday Godhasara if (event_manager_availability) 287c7fdb240SAbhyuday Godhasara return event_manager_availability; 288c7fdb240SAbhyuday Godhasara 289c7fdb240SAbhyuday Godhasara if (cb_type != PM_NOTIFY_CB && cb_type != PM_INIT_SUSPEND_CB) { 290c7fdb240SAbhyuday Godhasara pr_err("%s() Unsupported Callback 0x%x\n", __func__, cb_type); 291c7fdb240SAbhyuday Godhasara return -EINVAL; 292c7fdb240SAbhyuday Godhasara } 293c7fdb240SAbhyuday Godhasara 294c7fdb240SAbhyuday Godhasara if (!cb_fun) 295c7fdb240SAbhyuday Godhasara return -EFAULT; 296c7fdb240SAbhyuday Godhasara 297c7fdb240SAbhyuday Godhasara if (cb_type == PM_INIT_SUSPEND_CB) { 298c7fdb240SAbhyuday Godhasara ret = xlnx_add_cb_for_suspend(cb_fun, data); 299c7fdb240SAbhyuday Godhasara } else { 300c7fdb240SAbhyuday Godhasara if (!xlnx_is_error_event(node_id)) { 301c7fdb240SAbhyuday Godhasara /* Add entry for Node-Id/Event in hash table */ 302c7fdb240SAbhyuday Godhasara ret = xlnx_add_cb_for_notify_event(node_id, event, wake, cb_fun, data); 303c7fdb240SAbhyuday Godhasara } else { 304c7fdb240SAbhyuday Godhasara /* Add into Hash table */ 305c7fdb240SAbhyuday Godhasara for (pos = 0; pos < MAX_BITS; pos++) { 306c7fdb240SAbhyuday Godhasara eve = event & (1 << pos); 307c7fdb240SAbhyuday Godhasara if (!eve) 308c7fdb240SAbhyuday Godhasara continue; 309c7fdb240SAbhyuday Godhasara 310c7fdb240SAbhyuday Godhasara /* Add entry for Node-Id/Eve in hash table */ 311c7fdb240SAbhyuday Godhasara ret = xlnx_add_cb_for_notify_event(node_id, eve, wake, cb_fun, 312c7fdb240SAbhyuday Godhasara data); 313c7fdb240SAbhyuday Godhasara /* Break the loop if got error */ 314c7fdb240SAbhyuday Godhasara if (ret) 315c7fdb240SAbhyuday Godhasara break; 316c7fdb240SAbhyuday Godhasara } 317c7fdb240SAbhyuday Godhasara if (ret) { 318c7fdb240SAbhyuday Godhasara /* Skip the Event for which got the error */ 319c7fdb240SAbhyuday Godhasara pos--; 320c7fdb240SAbhyuday Godhasara /* Remove registered(during this call) event from hash table */ 321c7fdb240SAbhyuday Godhasara for ( ; pos >= 0; pos--) { 322c7fdb240SAbhyuday Godhasara eve = event & (1 << pos); 323c7fdb240SAbhyuday Godhasara if (!eve) 324c7fdb240SAbhyuday Godhasara continue; 325e6d3c99aSAbhyuday Godhasara xlnx_remove_cb_for_notify_event(node_id, eve, cb_fun, data); 326c7fdb240SAbhyuday Godhasara } 327c7fdb240SAbhyuday Godhasara } 328c7fdb240SAbhyuday Godhasara } 329c7fdb240SAbhyuday Godhasara 330c7fdb240SAbhyuday Godhasara if (ret) { 331c7fdb240SAbhyuday Godhasara pr_err("%s() failed for 0x%x and 0x%x: %d\r\n", __func__, node_id, 332c7fdb240SAbhyuday Godhasara event, ret); 333c7fdb240SAbhyuday Godhasara return ret; 334c7fdb240SAbhyuday Godhasara } 335c7fdb240SAbhyuday Godhasara 336c7fdb240SAbhyuday Godhasara /* Register for Node-Id/Event combination in firmware */ 337c7fdb240SAbhyuday Godhasara ret = zynqmp_pm_register_notifier(node_id, event, wake, true); 338c7fdb240SAbhyuday Godhasara if (ret) { 339c7fdb240SAbhyuday Godhasara pr_err("%s() failed for 0x%x and 0x%x: %d\r\n", __func__, node_id, 340c7fdb240SAbhyuday Godhasara event, ret); 341c7fdb240SAbhyuday Godhasara /* Remove already registered event from hash table */ 342c7fdb240SAbhyuday Godhasara if (xlnx_is_error_event(node_id)) { 343c7fdb240SAbhyuday Godhasara for (pos = 0; pos < MAX_BITS; pos++) { 344c7fdb240SAbhyuday Godhasara eve = event & (1 << pos); 345c7fdb240SAbhyuday Godhasara if (!eve) 346c7fdb240SAbhyuday Godhasara continue; 347e6d3c99aSAbhyuday Godhasara xlnx_remove_cb_for_notify_event(node_id, eve, cb_fun, data); 348c7fdb240SAbhyuday Godhasara } 349c7fdb240SAbhyuday Godhasara } else { 350e6d3c99aSAbhyuday Godhasara xlnx_remove_cb_for_notify_event(node_id, event, cb_fun, data); 351c7fdb240SAbhyuday Godhasara } 352c7fdb240SAbhyuday Godhasara return ret; 353c7fdb240SAbhyuday Godhasara } 354c7fdb240SAbhyuday Godhasara } 355c7fdb240SAbhyuday Godhasara 356c7fdb240SAbhyuday Godhasara return ret; 357c7fdb240SAbhyuday Godhasara } 358c7fdb240SAbhyuday Godhasara EXPORT_SYMBOL_GPL(xlnx_register_event); 359c7fdb240SAbhyuday Godhasara 360c7fdb240SAbhyuday Godhasara /** 361c7fdb240SAbhyuday Godhasara * xlnx_unregister_event() - Unregister for the event. 362c7fdb240SAbhyuday Godhasara * @cb_type: Type of callback from pm_api_cb_id, 363c7fdb240SAbhyuday Godhasara * PM_NOTIFY_CB - for Error Events, 364c7fdb240SAbhyuday Godhasara * PM_INIT_SUSPEND_CB - for suspend callback. 365c7fdb240SAbhyuday Godhasara * @node_id: Node-Id related to event. 366c7fdb240SAbhyuday Godhasara * @event: Event Mask for the Error Event. 367c7fdb240SAbhyuday Godhasara * @cb_fun: Function pointer of callback function. 368e6d3c99aSAbhyuday Godhasara * @data: Pointer of agent's private data. 369c7fdb240SAbhyuday Godhasara * 370c7fdb240SAbhyuday Godhasara * Return: Returns 0 on successful unregistration else error code. 371c7fdb240SAbhyuday Godhasara */ 372c7fdb240SAbhyuday Godhasara int xlnx_unregister_event(const enum pm_api_cb_id cb_type, const u32 node_id, const u32 event, 373e6d3c99aSAbhyuday Godhasara event_cb_func_t cb_fun, void *data) 374c7fdb240SAbhyuday Godhasara { 375e6d3c99aSAbhyuday Godhasara int ret = 0; 376c7fdb240SAbhyuday Godhasara u32 eve, pos; 377c7fdb240SAbhyuday Godhasara 378e6d3c99aSAbhyuday Godhasara is_need_to_unregister = false; 379e6d3c99aSAbhyuday Godhasara 380c7fdb240SAbhyuday Godhasara if (event_manager_availability) 381c7fdb240SAbhyuday Godhasara return event_manager_availability; 382c7fdb240SAbhyuday Godhasara 383c7fdb240SAbhyuday Godhasara if (cb_type != PM_NOTIFY_CB && cb_type != PM_INIT_SUSPEND_CB) { 384c7fdb240SAbhyuday Godhasara pr_err("%s() Unsupported Callback 0x%x\n", __func__, cb_type); 385c7fdb240SAbhyuday Godhasara return -EINVAL; 386c7fdb240SAbhyuday Godhasara } 387c7fdb240SAbhyuday Godhasara 388c7fdb240SAbhyuday Godhasara if (!cb_fun) 389c7fdb240SAbhyuday Godhasara return -EFAULT; 390c7fdb240SAbhyuday Godhasara 391c7fdb240SAbhyuday Godhasara if (cb_type == PM_INIT_SUSPEND_CB) { 392c7fdb240SAbhyuday Godhasara ret = xlnx_remove_cb_for_suspend(cb_fun); 393c7fdb240SAbhyuday Godhasara } else { 394c7fdb240SAbhyuday Godhasara /* Remove Node-Id/Event from hash table */ 395c7fdb240SAbhyuday Godhasara if (!xlnx_is_error_event(node_id)) { 396e6d3c99aSAbhyuday Godhasara xlnx_remove_cb_for_notify_event(node_id, event, cb_fun, data); 397c7fdb240SAbhyuday Godhasara } else { 398c7fdb240SAbhyuday Godhasara for (pos = 0; pos < MAX_BITS; pos++) { 399c7fdb240SAbhyuday Godhasara eve = event & (1 << pos); 400c7fdb240SAbhyuday Godhasara if (!eve) 401c7fdb240SAbhyuday Godhasara continue; 402c7fdb240SAbhyuday Godhasara 403e6d3c99aSAbhyuday Godhasara xlnx_remove_cb_for_notify_event(node_id, eve, cb_fun, data); 404c7fdb240SAbhyuday Godhasara } 405c7fdb240SAbhyuday Godhasara } 406c7fdb240SAbhyuday Godhasara 407e6d3c99aSAbhyuday Godhasara /* Un-register if list is empty */ 408e6d3c99aSAbhyuday Godhasara if (is_need_to_unregister) { 409c7fdb240SAbhyuday Godhasara /* Un-register for Node-Id/Event combination */ 410c7fdb240SAbhyuday Godhasara ret = zynqmp_pm_register_notifier(node_id, event, false, false); 411c7fdb240SAbhyuday Godhasara if (ret) { 412c7fdb240SAbhyuday Godhasara pr_err("%s() failed for 0x%x and 0x%x: %d\n", 413c7fdb240SAbhyuday Godhasara __func__, node_id, event, ret); 414c7fdb240SAbhyuday Godhasara return ret; 415c7fdb240SAbhyuday Godhasara } 416c7fdb240SAbhyuday Godhasara } 417e6d3c99aSAbhyuday Godhasara } 418c7fdb240SAbhyuday Godhasara 419c7fdb240SAbhyuday Godhasara return ret; 420c7fdb240SAbhyuday Godhasara } 421c7fdb240SAbhyuday Godhasara EXPORT_SYMBOL_GPL(xlnx_unregister_event); 422c7fdb240SAbhyuday Godhasara 423c7fdb240SAbhyuday Godhasara static void xlnx_call_suspend_cb_handler(const u32 *payload) 424c7fdb240SAbhyuday Godhasara { 425c7fdb240SAbhyuday Godhasara bool is_callback_found = false; 426c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 427c7fdb240SAbhyuday Godhasara u32 cb_type = payload[0]; 42805e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 42905e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 430c7fdb240SAbhyuday Godhasara 431c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given cb_type */ 432c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, cb_type) { 433c7fdb240SAbhyuday Godhasara if (eve_data->cb_type == cb_type) { 43405e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 43505e5ba40SAbhyuday Godhasara cb_pos->eve_cb(&payload[0], cb_pos->agent_data); 436c7fdb240SAbhyuday Godhasara is_callback_found = true; 437c7fdb240SAbhyuday Godhasara } 438c7fdb240SAbhyuday Godhasara } 43905e5ba40SAbhyuday Godhasara } 440c7fdb240SAbhyuday Godhasara if (!is_callback_found) 441c7fdb240SAbhyuday Godhasara pr_warn("Didn't find any registered callback for suspend event\n"); 442c7fdb240SAbhyuday Godhasara } 443c7fdb240SAbhyuday Godhasara 444c7fdb240SAbhyuday Godhasara static void xlnx_call_notify_cb_handler(const u32 *payload) 445c7fdb240SAbhyuday Godhasara { 446c7fdb240SAbhyuday Godhasara bool is_callback_found = false; 447c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 448c7fdb240SAbhyuday Godhasara u64 key = ((u64)payload[1] << 32U) | (u64)payload[2]; 449c7fdb240SAbhyuday Godhasara int ret; 45005e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 45105e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 452c7fdb240SAbhyuday Godhasara 453c7fdb240SAbhyuday Godhasara /* Check for existing entry in hash table for given key id */ 454c7fdb240SAbhyuday Godhasara hash_for_each_possible(reg_driver_map, eve_data, hentry, key) { 455c7fdb240SAbhyuday Godhasara if (eve_data->key == key) { 45605e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 45705e5ba40SAbhyuday Godhasara cb_pos->eve_cb(&payload[0], cb_pos->agent_data); 458c7fdb240SAbhyuday Godhasara is_callback_found = true; 45905e5ba40SAbhyuday Godhasara } 460c7fdb240SAbhyuday Godhasara 461c7fdb240SAbhyuday Godhasara /* re register with firmware to get future events */ 462c7fdb240SAbhyuday Godhasara ret = zynqmp_pm_register_notifier(payload[1], payload[2], 463c7fdb240SAbhyuday Godhasara eve_data->wake, true); 464c7fdb240SAbhyuday Godhasara if (ret) { 465c7fdb240SAbhyuday Godhasara pr_err("%s() failed for 0x%x and 0x%x: %d\r\n", __func__, 466c7fdb240SAbhyuday Godhasara payload[1], payload[2], ret); 46705e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, 46805e5ba40SAbhyuday Godhasara list) { 469c7fdb240SAbhyuday Godhasara /* Remove already registered event from hash table */ 470c7fdb240SAbhyuday Godhasara xlnx_remove_cb_for_notify_event(payload[1], payload[2], 471e6d3c99aSAbhyuday Godhasara cb_pos->eve_cb, 472e6d3c99aSAbhyuday Godhasara cb_pos->agent_data); 47305e5ba40SAbhyuday Godhasara } 474c7fdb240SAbhyuday Godhasara } 475c7fdb240SAbhyuday Godhasara } 476c7fdb240SAbhyuday Godhasara } 477c7fdb240SAbhyuday Godhasara if (!is_callback_found) 478c7fdb240SAbhyuday Godhasara pr_warn("Didn't find any registered callback for 0x%x 0x%x\n", 479c7fdb240SAbhyuday Godhasara payload[1], payload[2]); 480c7fdb240SAbhyuday Godhasara } 481c7fdb240SAbhyuday Godhasara 482c7fdb240SAbhyuday Godhasara static void xlnx_get_event_callback_data(u32 *buf) 483c7fdb240SAbhyuday Godhasara { 484c7fdb240SAbhyuday Godhasara zynqmp_pm_invoke_fn(GET_CALLBACK_DATA, 0, 0, 0, 0, buf); 485c7fdb240SAbhyuday Godhasara } 486c7fdb240SAbhyuday Godhasara 487c7fdb240SAbhyuday Godhasara static irqreturn_t xlnx_event_handler(int irq, void *dev_id) 488c7fdb240SAbhyuday Godhasara { 489c7fdb240SAbhyuday Godhasara u32 cb_type, node_id, event, pos; 490c7fdb240SAbhyuday Godhasara u32 payload[CB_MAX_PAYLOAD_SIZE] = {0}; 491c7fdb240SAbhyuday Godhasara u32 event_data[CB_MAX_PAYLOAD_SIZE] = {0}; 492c7fdb240SAbhyuday Godhasara 493c7fdb240SAbhyuday Godhasara /* Get event data */ 494c7fdb240SAbhyuday Godhasara xlnx_get_event_callback_data(payload); 495c7fdb240SAbhyuday Godhasara 496c7fdb240SAbhyuday Godhasara /* First element is callback type, others are callback arguments */ 497c7fdb240SAbhyuday Godhasara cb_type = payload[0]; 498c7fdb240SAbhyuday Godhasara 499c7fdb240SAbhyuday Godhasara if (cb_type == PM_NOTIFY_CB) { 500c7fdb240SAbhyuday Godhasara node_id = payload[1]; 501c7fdb240SAbhyuday Godhasara event = payload[2]; 502c7fdb240SAbhyuday Godhasara if (!xlnx_is_error_event(node_id)) { 503c7fdb240SAbhyuday Godhasara xlnx_call_notify_cb_handler(payload); 504c7fdb240SAbhyuday Godhasara } else { 505c7fdb240SAbhyuday Godhasara /* 506c7fdb240SAbhyuday Godhasara * Each call back function expecting payload as an input arguments. 507c7fdb240SAbhyuday Godhasara * We can get multiple error events as in one call back through error 508c7fdb240SAbhyuday Godhasara * mask. So payload[2] may can contain multiple error events. 509c7fdb240SAbhyuday Godhasara * In reg_driver_map database we store data in the combination of single 510c7fdb240SAbhyuday Godhasara * node_id-error combination. 511c7fdb240SAbhyuday Godhasara * So coping the payload message into event_data and update the 512c7fdb240SAbhyuday Godhasara * event_data[2] with Error Mask for single error event and use 513c7fdb240SAbhyuday Godhasara * event_data as input argument for registered call back function. 514c7fdb240SAbhyuday Godhasara * 515c7fdb240SAbhyuday Godhasara */ 516c7fdb240SAbhyuday Godhasara memcpy(event_data, payload, (4 * CB_MAX_PAYLOAD_SIZE)); 517c7fdb240SAbhyuday Godhasara /* Support Multiple Error Event */ 518c7fdb240SAbhyuday Godhasara for (pos = 0; pos < MAX_BITS; pos++) { 519c7fdb240SAbhyuday Godhasara if ((0 == (event & (1 << pos)))) 520c7fdb240SAbhyuday Godhasara continue; 521c7fdb240SAbhyuday Godhasara event_data[2] = (event & (1 << pos)); 522c7fdb240SAbhyuday Godhasara xlnx_call_notify_cb_handler(event_data); 523c7fdb240SAbhyuday Godhasara } 524c7fdb240SAbhyuday Godhasara } 525c7fdb240SAbhyuday Godhasara } else if (cb_type == PM_INIT_SUSPEND_CB) { 526c7fdb240SAbhyuday Godhasara xlnx_call_suspend_cb_handler(payload); 527c7fdb240SAbhyuday Godhasara } else { 528c7fdb240SAbhyuday Godhasara pr_err("%s() Unsupported Callback %d\n", __func__, cb_type); 529c7fdb240SAbhyuday Godhasara } 530c7fdb240SAbhyuday Godhasara 531c7fdb240SAbhyuday Godhasara return IRQ_HANDLED; 532c7fdb240SAbhyuday Godhasara } 533c7fdb240SAbhyuday Godhasara 534c7fdb240SAbhyuday Godhasara static int xlnx_event_cpuhp_start(unsigned int cpu) 535c7fdb240SAbhyuday Godhasara { 536c7fdb240SAbhyuday Godhasara enable_percpu_irq(virq_sgi, IRQ_TYPE_NONE); 537c7fdb240SAbhyuday Godhasara 538c7fdb240SAbhyuday Godhasara return 0; 539c7fdb240SAbhyuday Godhasara } 540c7fdb240SAbhyuday Godhasara 541c7fdb240SAbhyuday Godhasara static int xlnx_event_cpuhp_down(unsigned int cpu) 542c7fdb240SAbhyuday Godhasara { 543c7fdb240SAbhyuday Godhasara disable_percpu_irq(virq_sgi); 544c7fdb240SAbhyuday Godhasara 545c7fdb240SAbhyuday Godhasara return 0; 546c7fdb240SAbhyuday Godhasara } 547c7fdb240SAbhyuday Godhasara 548c7fdb240SAbhyuday Godhasara static void xlnx_disable_percpu_irq(void *data) 549c7fdb240SAbhyuday Godhasara { 550c7fdb240SAbhyuday Godhasara disable_percpu_irq(virq_sgi); 551c7fdb240SAbhyuday Godhasara } 552c7fdb240SAbhyuday Godhasara 553c7fdb240SAbhyuday Godhasara static int xlnx_event_init_sgi(struct platform_device *pdev) 554c7fdb240SAbhyuday Godhasara { 555c7fdb240SAbhyuday Godhasara int ret = 0; 556c7fdb240SAbhyuday Godhasara int cpu = smp_processor_id(); 557c7fdb240SAbhyuday Godhasara /* 558c7fdb240SAbhyuday Godhasara * IRQ related structures are used for the following: 559c7fdb240SAbhyuday Godhasara * for each SGI interrupt ensure its mapped by GIC IRQ domain 560c7fdb240SAbhyuday Godhasara * and that each corresponding linux IRQ for the HW IRQ has 561c7fdb240SAbhyuday Godhasara * a handler for when receiving an interrupt from the remote 562c7fdb240SAbhyuday Godhasara * processor. 563c7fdb240SAbhyuday Godhasara */ 564c7fdb240SAbhyuday Godhasara struct irq_domain *domain; 565c7fdb240SAbhyuday Godhasara struct irq_fwspec sgi_fwspec; 566c7fdb240SAbhyuday Godhasara struct device_node *interrupt_parent = NULL; 567c7fdb240SAbhyuday Godhasara struct device *parent = pdev->dev.parent; 568c7fdb240SAbhyuday Godhasara 569c7fdb240SAbhyuday Godhasara /* Find GIC controller to map SGIs. */ 570c7fdb240SAbhyuday Godhasara interrupt_parent = of_irq_find_parent(parent->of_node); 571c7fdb240SAbhyuday Godhasara if (!interrupt_parent) { 572c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "Failed to find property for Interrupt parent\n"); 573c7fdb240SAbhyuday Godhasara return -EINVAL; 574c7fdb240SAbhyuday Godhasara } 575c7fdb240SAbhyuday Godhasara 576c7fdb240SAbhyuday Godhasara /* Each SGI needs to be associated with GIC's IRQ domain. */ 577c7fdb240SAbhyuday Godhasara domain = irq_find_host(interrupt_parent); 578c7fdb240SAbhyuday Godhasara of_node_put(interrupt_parent); 579c7fdb240SAbhyuday Godhasara 580c7fdb240SAbhyuday Godhasara /* Each mapping needs GIC domain when finding IRQ mapping. */ 581c7fdb240SAbhyuday Godhasara sgi_fwspec.fwnode = domain->fwnode; 582c7fdb240SAbhyuday Godhasara 583c7fdb240SAbhyuday Godhasara /* 584c7fdb240SAbhyuday Godhasara * When irq domain looks at mapping each arg is as follows: 585c7fdb240SAbhyuday Godhasara * 3 args for: interrupt type (SGI), interrupt # (set later), type 586c7fdb240SAbhyuday Godhasara */ 587c7fdb240SAbhyuday Godhasara sgi_fwspec.param_count = 1; 588c7fdb240SAbhyuday Godhasara 589c7fdb240SAbhyuday Godhasara /* Set SGI's hwirq */ 590c7fdb240SAbhyuday Godhasara sgi_fwspec.param[0] = sgi_num; 591c7fdb240SAbhyuday Godhasara virq_sgi = irq_create_fwspec_mapping(&sgi_fwspec); 592c7fdb240SAbhyuday Godhasara 593c7fdb240SAbhyuday Godhasara per_cpu(cpu_number1, cpu) = cpu; 594c7fdb240SAbhyuday Godhasara ret = request_percpu_irq(virq_sgi, xlnx_event_handler, "xlnx_event_mgmt", 595c7fdb240SAbhyuday Godhasara &cpu_number1); 596c7fdb240SAbhyuday Godhasara WARN_ON(ret); 597c7fdb240SAbhyuday Godhasara if (ret) { 598c7fdb240SAbhyuday Godhasara irq_dispose_mapping(virq_sgi); 599c7fdb240SAbhyuday Godhasara return ret; 600c7fdb240SAbhyuday Godhasara } 601c7fdb240SAbhyuday Godhasara 602c7fdb240SAbhyuday Godhasara irq_to_desc(virq_sgi); 603c7fdb240SAbhyuday Godhasara irq_set_status_flags(virq_sgi, IRQ_PER_CPU); 604c7fdb240SAbhyuday Godhasara 605c7fdb240SAbhyuday Godhasara return ret; 606c7fdb240SAbhyuday Godhasara } 607c7fdb240SAbhyuday Godhasara 608c7fdb240SAbhyuday Godhasara static void xlnx_event_cleanup_sgi(struct platform_device *pdev) 609c7fdb240SAbhyuday Godhasara { 610c7fdb240SAbhyuday Godhasara int cpu = smp_processor_id(); 611c7fdb240SAbhyuday Godhasara 612c7fdb240SAbhyuday Godhasara per_cpu(cpu_number1, cpu) = cpu; 613c7fdb240SAbhyuday Godhasara 614c7fdb240SAbhyuday Godhasara cpuhp_remove_state(CPUHP_AP_ONLINE_DYN); 615c7fdb240SAbhyuday Godhasara 616c7fdb240SAbhyuday Godhasara on_each_cpu(xlnx_disable_percpu_irq, NULL, 1); 617c7fdb240SAbhyuday Godhasara 618c7fdb240SAbhyuday Godhasara irq_clear_status_flags(virq_sgi, IRQ_PER_CPU); 619c7fdb240SAbhyuday Godhasara free_percpu_irq(virq_sgi, &cpu_number1); 620c7fdb240SAbhyuday Godhasara irq_dispose_mapping(virq_sgi); 621c7fdb240SAbhyuday Godhasara } 622c7fdb240SAbhyuday Godhasara 623c7fdb240SAbhyuday Godhasara static int xlnx_event_manager_probe(struct platform_device *pdev) 624c7fdb240SAbhyuday Godhasara { 625c7fdb240SAbhyuday Godhasara int ret; 626c7fdb240SAbhyuday Godhasara 627c7fdb240SAbhyuday Godhasara ret = zynqmp_pm_feature(PM_REGISTER_NOTIFIER); 628c7fdb240SAbhyuday Godhasara if (ret < 0) { 629c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "Feature check failed with %d\n", ret); 630c7fdb240SAbhyuday Godhasara return ret; 631c7fdb240SAbhyuday Godhasara } 632c7fdb240SAbhyuday Godhasara 633c7fdb240SAbhyuday Godhasara if ((ret & FIRMWARE_VERSION_MASK) < 634c7fdb240SAbhyuday Godhasara REGISTER_NOTIFIER_FIRMWARE_VERSION) { 635c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "Register notifier version error. Expected Firmware: v%d - Found: v%d\n", 636c7fdb240SAbhyuday Godhasara REGISTER_NOTIFIER_FIRMWARE_VERSION, 637c7fdb240SAbhyuday Godhasara ret & FIRMWARE_VERSION_MASK); 638c7fdb240SAbhyuday Godhasara return -EOPNOTSUPP; 639c7fdb240SAbhyuday Godhasara } 640c7fdb240SAbhyuday Godhasara 641c7fdb240SAbhyuday Godhasara /* Initialize the SGI */ 642c7fdb240SAbhyuday Godhasara ret = xlnx_event_init_sgi(pdev); 643c7fdb240SAbhyuday Godhasara if (ret) { 644c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "SGI Init has been failed with %d\n", ret); 645c7fdb240SAbhyuday Godhasara return ret; 646c7fdb240SAbhyuday Godhasara } 647c7fdb240SAbhyuday Godhasara 648c7fdb240SAbhyuday Godhasara /* Setup function for the CPU hot-plug cases */ 649c7fdb240SAbhyuday Godhasara cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "soc/event:starting", 650c7fdb240SAbhyuday Godhasara xlnx_event_cpuhp_start, xlnx_event_cpuhp_down); 651c7fdb240SAbhyuday Godhasara 652acd6510dSTanmay Shah ret = zynqmp_pm_register_sgi(sgi_num, 0); 653c7fdb240SAbhyuday Godhasara if (ret) { 654c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "SGI %d Registration over TF-A failed with %d\n", sgi_num, ret); 655c7fdb240SAbhyuday Godhasara xlnx_event_cleanup_sgi(pdev); 656c7fdb240SAbhyuday Godhasara return ret; 657c7fdb240SAbhyuday Godhasara } 658c7fdb240SAbhyuday Godhasara 659c7fdb240SAbhyuday Godhasara event_manager_availability = 0; 660c7fdb240SAbhyuday Godhasara 661c7fdb240SAbhyuday Godhasara dev_info(&pdev->dev, "SGI %d Registered over TF-A\n", sgi_num); 662c7fdb240SAbhyuday Godhasara dev_info(&pdev->dev, "Xilinx Event Management driver probed\n"); 663c7fdb240SAbhyuday Godhasara 664c7fdb240SAbhyuday Godhasara return ret; 665c7fdb240SAbhyuday Godhasara } 666c7fdb240SAbhyuday Godhasara 667c7fdb240SAbhyuday Godhasara static int xlnx_event_manager_remove(struct platform_device *pdev) 668c7fdb240SAbhyuday Godhasara { 669c7fdb240SAbhyuday Godhasara int i; 670c7fdb240SAbhyuday Godhasara struct registered_event_data *eve_data; 671c7fdb240SAbhyuday Godhasara struct hlist_node *tmp; 672c7fdb240SAbhyuday Godhasara int ret; 67305e5ba40SAbhyuday Godhasara struct agent_cb *cb_pos; 67405e5ba40SAbhyuday Godhasara struct agent_cb *cb_next; 675c7fdb240SAbhyuday Godhasara 676c7fdb240SAbhyuday Godhasara hash_for_each_safe(reg_driver_map, i, tmp, eve_data, hentry) { 67705e5ba40SAbhyuday Godhasara list_for_each_entry_safe(cb_pos, cb_next, &eve_data->cb_list_head, list) { 67805e5ba40SAbhyuday Godhasara list_del_init(&cb_pos->list); 67905e5ba40SAbhyuday Godhasara kfree(cb_pos); 68005e5ba40SAbhyuday Godhasara } 681c7fdb240SAbhyuday Godhasara hash_del(&eve_data->hentry); 682c7fdb240SAbhyuday Godhasara kfree(eve_data); 683c7fdb240SAbhyuday Godhasara } 684c7fdb240SAbhyuday Godhasara 685acd6510dSTanmay Shah ret = zynqmp_pm_register_sgi(0, 1); 686c7fdb240SAbhyuday Godhasara if (ret) 687c7fdb240SAbhyuday Godhasara dev_err(&pdev->dev, "SGI unregistration over TF-A failed with %d\n", ret); 688c7fdb240SAbhyuday Godhasara 689c7fdb240SAbhyuday Godhasara xlnx_event_cleanup_sgi(pdev); 690c7fdb240SAbhyuday Godhasara 691c7fdb240SAbhyuday Godhasara event_manager_availability = -EACCES; 692c7fdb240SAbhyuday Godhasara 693c7fdb240SAbhyuday Godhasara return ret; 694c7fdb240SAbhyuday Godhasara } 695c7fdb240SAbhyuday Godhasara 696c7fdb240SAbhyuday Godhasara static struct platform_driver xlnx_event_manager_driver = { 697c7fdb240SAbhyuday Godhasara .probe = xlnx_event_manager_probe, 698c7fdb240SAbhyuday Godhasara .remove = xlnx_event_manager_remove, 699c7fdb240SAbhyuday Godhasara .driver = { 700c7fdb240SAbhyuday Godhasara .name = "xlnx_event_manager", 701c7fdb240SAbhyuday Godhasara }, 702c7fdb240SAbhyuday Godhasara }; 703c7fdb240SAbhyuday Godhasara module_param(sgi_num, uint, 0); 704c7fdb240SAbhyuday Godhasara module_platform_driver(xlnx_event_manager_driver); 705