1e24c1f86SMichael Straube // SPDX-License-Identifier: GPL-2.0 22865d42cSLarry Finger /****************************************************************************** 32865d42cSLarry Finger * rtl871x_io.c 42865d42cSLarry Finger * 52865d42cSLarry Finger * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 62865d42cSLarry Finger * Linux device driver for RTL8192SU 72865d42cSLarry Finger * 82865d42cSLarry Finger * Modifications for inclusion into the Linux staging tree are 92865d42cSLarry Finger * Copyright(c) 2010 Larry Finger. All rights reserved. 102865d42cSLarry Finger * 112865d42cSLarry Finger * Contact information: 122865d42cSLarry Finger * WLAN FAE <wlanfae@realtek.com> 132865d42cSLarry Finger * Larry Finger <Larry.Finger@lwfinger.net> 142865d42cSLarry Finger * 152865d42cSLarry Finger ******************************************************************************/ 162865d42cSLarry Finger /* 172865d42cSLarry Finger * 182865d42cSLarry Finger * The purpose of rtl871x_io.c 192865d42cSLarry Finger * 202865d42cSLarry Finger * a. provides the API 212865d42cSLarry Finger * b. provides the protocol engine 222865d42cSLarry Finger * c. provides the software interface between caller and the hardware interface 232865d42cSLarry Finger * 242865d42cSLarry Finger * For r8712u, both sync/async operations are provided. 252865d42cSLarry Finger * 262865d42cSLarry Finger * Only sync read/write_mem operations are provided. 272865d42cSLarry Finger * 282865d42cSLarry Finger */ 292865d42cSLarry Finger 302865d42cSLarry Finger #define _RTL871X_IO_C_ 312865d42cSLarry Finger 322865d42cSLarry Finger #include "osdep_service.h" 332865d42cSLarry Finger #include "drv_types.h" 342865d42cSLarry Finger #include "rtl871x_io.h" 352865d42cSLarry Finger #include "osdep_intf.h" 362865d42cSLarry Finger #include "usb_ops.h" 372865d42cSLarry Finger 382865d42cSLarry Finger static uint _init_intf_hdl(struct _adapter *padapter, 392865d42cSLarry Finger struct intf_hdl *pintf_hdl) 402865d42cSLarry Finger { 412865d42cSLarry Finger struct intf_priv *pintf_priv; 422865d42cSLarry Finger void (*set_intf_option)(u32 *poption) = NULL; 432865d42cSLarry Finger void (*set_intf_funs)(struct intf_hdl *pintf_hdl); 442865d42cSLarry Finger void (*set_intf_ops)(struct _io_ops *pops); 452865d42cSLarry Finger uint (*init_intf_priv)(struct intf_priv *pintfpriv); 462865d42cSLarry Finger 472865d42cSLarry Finger set_intf_option = &(r8712_usb_set_intf_option); 482865d42cSLarry Finger set_intf_funs = &(r8712_usb_set_intf_funs); 492865d42cSLarry Finger set_intf_ops = &r8712_usb_set_intf_ops; 502865d42cSLarry Finger init_intf_priv = &r8712_usb_init_intf_priv; 5191d435feSVitaly Osipov pintf_priv = pintf_hdl->pintfpriv = kmalloc(sizeof(struct intf_priv), 5291d435feSVitaly Osipov GFP_ATOMIC); 532865d42cSLarry Finger if (pintf_priv == NULL) 542865d42cSLarry Finger goto _init_intf_hdl_fail; 552865d42cSLarry Finger pintf_hdl->adapter = (u8 *)padapter; 562865d42cSLarry Finger set_intf_option(&pintf_hdl->intf_option); 572865d42cSLarry Finger set_intf_funs(pintf_hdl); 582865d42cSLarry Finger set_intf_ops(&pintf_hdl->io_ops); 59cbe5d64fSDafna Hirschfeld pintf_priv->intf_dev = (u8 *)&padapter->dvobjpriv; 602865d42cSLarry Finger if (init_intf_priv(pintf_priv) == _FAIL) 612865d42cSLarry Finger goto _init_intf_hdl_fail; 622865d42cSLarry Finger return _SUCCESS; 632865d42cSLarry Finger _init_intf_hdl_fail: 6440083865SAlexander Beregalov kfree(pintf_priv); 652865d42cSLarry Finger return _FAIL; 662865d42cSLarry Finger } 672865d42cSLarry Finger 682865d42cSLarry Finger static void _unload_intf_hdl(struct intf_priv *pintfpriv) 692865d42cSLarry Finger { 702865d42cSLarry Finger void (*unload_intf_priv)(struct intf_priv *pintfpriv); 712865d42cSLarry Finger 722865d42cSLarry Finger unload_intf_priv = &r8712_usb_unload_intf_priv; 732865d42cSLarry Finger unload_intf_priv(pintfpriv); 7440083865SAlexander Beregalov kfree(pintfpriv); 752865d42cSLarry Finger } 762865d42cSLarry Finger 772865d42cSLarry Finger static uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl) 782865d42cSLarry Finger { 792865d42cSLarry Finger struct _adapter *adapter = (struct _adapter *)dev; 802865d42cSLarry Finger 812865d42cSLarry Finger pintfhdl->intf_option = 0; 822865d42cSLarry Finger pintfhdl->adapter = dev; 83cbe5d64fSDafna Hirschfeld pintfhdl->intf_dev = (u8 *)&adapter->dvobjpriv; 84366ba427STapasweni Pathak if (!_init_intf_hdl(adapter, pintfhdl)) 852865d42cSLarry Finger goto register_intf_hdl_fail; 862865d42cSLarry Finger return _SUCCESS; 872865d42cSLarry Finger register_intf_hdl_fail: 882865d42cSLarry Finger return false; 892865d42cSLarry Finger } 902865d42cSLarry Finger 912865d42cSLarry Finger static void unregister_intf_hdl(struct intf_hdl *pintfhdl) 922865d42cSLarry Finger { 932865d42cSLarry Finger _unload_intf_hdl(pintfhdl->pintfpriv); 942865d42cSLarry Finger memset((u8 *)pintfhdl, 0, sizeof(struct intf_hdl)); 952865d42cSLarry Finger } 962865d42cSLarry Finger 972865d42cSLarry Finger uint r8712_alloc_io_queue(struct _adapter *adapter) 982865d42cSLarry Finger { 992865d42cSLarry Finger u32 i; 1002865d42cSLarry Finger struct io_queue *pio_queue; 1012865d42cSLarry Finger struct io_req *pio_req; 1022865d42cSLarry Finger 103bd9dc62cSVitaly Osipov pio_queue = kmalloc(sizeof(*pio_queue), GFP_ATOMIC); 1049155c924SBhumika Goyal if (!pio_queue) 1052865d42cSLarry Finger goto alloc_io_queue_fail; 106534c4acdSJames A Shackleford INIT_LIST_HEAD(&pio_queue->free_ioreqs); 107534c4acdSJames A Shackleford INIT_LIST_HEAD(&pio_queue->processing); 108534c4acdSJames A Shackleford INIT_LIST_HEAD(&pio_queue->pending); 1092865d42cSLarry Finger spin_lock_init(&pio_queue->lock); 1100234961dSHariprasad Kelam pio_queue->pallocated_free_ioreqs_buf = kzalloc(NUM_IOREQ * 11191d435feSVitaly Osipov (sizeof(struct io_req)) + 4, 11291d435feSVitaly Osipov GFP_ATOMIC); 1132865d42cSLarry Finger if ((pio_queue->pallocated_free_ioreqs_buf) == NULL) 1142865d42cSLarry Finger goto alloc_io_queue_fail; 1152865d42cSLarry Finger pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4 1162865d42cSLarry Finger - ((addr_t)(pio_queue->pallocated_free_ioreqs_buf) 1172865d42cSLarry Finger & 3); 1182865d42cSLarry Finger pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf); 1192865d42cSLarry Finger for (i = 0; i < NUM_IOREQ; i++) { 120534c4acdSJames A Shackleford INIT_LIST_HEAD(&pio_req->list); 121fdfbf789SJames A Shackleford list_add_tail(&pio_req->list, &pio_queue->free_ioreqs); 1222865d42cSLarry Finger pio_req++; 1232865d42cSLarry Finger } 124cbe5d64fSDafna Hirschfeld if ((register_intf_hdl((u8 *)adapter, &pio_queue->intf)) == _FAIL) 1252865d42cSLarry Finger goto alloc_io_queue_fail; 1262865d42cSLarry Finger adapter->pio_queue = pio_queue; 1272865d42cSLarry Finger return _SUCCESS; 1282865d42cSLarry Finger alloc_io_queue_fail: 1292865d42cSLarry Finger if (pio_queue) { 1302865d42cSLarry Finger kfree(pio_queue->pallocated_free_ioreqs_buf); 131646da830STapasweni Pathak kfree(pio_queue); 1322865d42cSLarry Finger } 1332865d42cSLarry Finger adapter->pio_queue = NULL; 1342865d42cSLarry Finger return _FAIL; 1352865d42cSLarry Finger } 1362865d42cSLarry Finger 1372865d42cSLarry Finger void r8712_free_io_queue(struct _adapter *adapter) 1382865d42cSLarry Finger { 1390b2ea2c7SShivani Bhardwaj struct io_queue *pio_queue = adapter->pio_queue; 1402865d42cSLarry Finger 1412865d42cSLarry Finger if (pio_queue) { 1422865d42cSLarry Finger kfree(pio_queue->pallocated_free_ioreqs_buf); 1432865d42cSLarry Finger adapter->pio_queue = NULL; 1442865d42cSLarry Finger unregister_intf_hdl(&pio_queue->intf); 145646da830STapasweni Pathak kfree(pio_queue); 1462865d42cSLarry Finger } 1472865d42cSLarry Finger } 148