1 // SPDX-License-Identifier: GPL-2.0 2 /****************************************************************************** 3 * rtl871x_io.c 4 * 5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 6 * Linux device driver for RTL8192SU 7 * 8 * Modifications for inclusion into the Linux staging tree are 9 * Copyright(c) 2010 Larry Finger. All rights reserved. 10 * 11 * Contact information: 12 * WLAN FAE <wlanfae@realtek.com> 13 * Larry Finger <Larry.Finger@lwfinger.net> 14 * 15 ******************************************************************************/ 16 /* 17 * 18 * The purpose of rtl871x_io.c 19 * 20 * a. provides the API 21 * b. provides the protocol engine 22 * c. provides the software interface between caller and the hardware interface 23 * 24 * For r8712u, both sync/async operations are provided. 25 * 26 * Only sync read/write_mem operations are provided. 27 * 28 */ 29 30 #define _RTL871X_IO_C_ 31 32 #include "osdep_service.h" 33 #include "drv_types.h" 34 #include "rtl871x_io.h" 35 #include "osdep_intf.h" 36 #include "usb_ops.h" 37 38 static uint _init_intf_hdl(struct _adapter *padapter, 39 struct intf_hdl *pintf_hdl) 40 { 41 struct intf_priv *pintf_priv; 42 void (*set_intf_option)(u32 *poption) = NULL; 43 void (*set_intf_funs)(struct intf_hdl *pintf_hdl); 44 void (*set_intf_ops)(struct _io_ops *pops); 45 uint (*init_intf_priv)(struct intf_priv *pintfpriv); 46 47 set_intf_option = &(r8712_usb_set_intf_option); 48 set_intf_funs = &(r8712_usb_set_intf_funs); 49 set_intf_ops = &r8712_usb_set_intf_ops; 50 init_intf_priv = &r8712_usb_init_intf_priv; 51 pintf_priv = pintf_hdl->pintfpriv = kmalloc(sizeof(struct intf_priv), 52 GFP_ATOMIC); 53 if (!pintf_priv) 54 goto _init_intf_hdl_fail; 55 pintf_hdl->adapter = (u8 *)padapter; 56 set_intf_option(&pintf_hdl->intf_option); 57 set_intf_funs(pintf_hdl); 58 set_intf_ops(&pintf_hdl->io_ops); 59 pintf_priv->intf_dev = (u8 *)&padapter->dvobjpriv; 60 if (init_intf_priv(pintf_priv) == _FAIL) 61 goto _init_intf_hdl_fail; 62 return _SUCCESS; 63 _init_intf_hdl_fail: 64 kfree(pintf_priv); 65 return _FAIL; 66 } 67 68 static void _unload_intf_hdl(struct intf_priv *pintfpriv) 69 { 70 void (*unload_intf_priv)(struct intf_priv *pintfpriv); 71 72 unload_intf_priv = &r8712_usb_unload_intf_priv; 73 unload_intf_priv(pintfpriv); 74 kfree(pintfpriv); 75 } 76 77 static uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl) 78 { 79 struct _adapter *adapter = (struct _adapter *)dev; 80 81 pintfhdl->intf_option = 0; 82 pintfhdl->adapter = dev; 83 pintfhdl->intf_dev = (u8 *)&adapter->dvobjpriv; 84 if (!_init_intf_hdl(adapter, pintfhdl)) 85 goto register_intf_hdl_fail; 86 return _SUCCESS; 87 register_intf_hdl_fail: 88 return false; 89 } 90 91 static void unregister_intf_hdl(struct intf_hdl *pintfhdl) 92 { 93 _unload_intf_hdl(pintfhdl->pintfpriv); 94 memset((u8 *)pintfhdl, 0, sizeof(struct intf_hdl)); 95 } 96 97 uint r8712_alloc_io_queue(struct _adapter *adapter) 98 { 99 u32 i; 100 struct io_queue *pio_queue; 101 struct io_req *pio_req; 102 103 pio_queue = kmalloc(sizeof(*pio_queue), GFP_ATOMIC); 104 if (!pio_queue) 105 goto alloc_io_queue_fail; 106 INIT_LIST_HEAD(&pio_queue->free_ioreqs); 107 INIT_LIST_HEAD(&pio_queue->processing); 108 INIT_LIST_HEAD(&pio_queue->pending); 109 spin_lock_init(&pio_queue->lock); 110 pio_queue->pallocated_free_ioreqs_buf = kzalloc(NUM_IOREQ * 111 (sizeof(struct io_req)) + 4, 112 GFP_ATOMIC); 113 if ((pio_queue->pallocated_free_ioreqs_buf) == NULL) 114 goto alloc_io_queue_fail; 115 pio_queue->free_ioreqs_buf = pio_queue->pallocated_free_ioreqs_buf + 4 116 - ((addr_t)(pio_queue->pallocated_free_ioreqs_buf) 117 & 3); 118 pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf); 119 for (i = 0; i < NUM_IOREQ; i++) { 120 INIT_LIST_HEAD(&pio_req->list); 121 list_add_tail(&pio_req->list, &pio_queue->free_ioreqs); 122 pio_req++; 123 } 124 if ((register_intf_hdl((u8 *)adapter, &pio_queue->intf)) == _FAIL) 125 goto alloc_io_queue_fail; 126 adapter->pio_queue = pio_queue; 127 return _SUCCESS; 128 alloc_io_queue_fail: 129 if (pio_queue) { 130 kfree(pio_queue->pallocated_free_ioreqs_buf); 131 kfree(pio_queue); 132 } 133 adapter->pio_queue = NULL; 134 return _FAIL; 135 } 136 137 void r8712_free_io_queue(struct _adapter *adapter) 138 { 139 struct io_queue *pio_queue = adapter->pio_queue; 140 141 if (pio_queue) { 142 kfree(pio_queue->pallocated_free_ioreqs_buf); 143 adapter->pio_queue = NULL; 144 unregister_intf_hdl(&pio_queue->intf); 145 kfree(pio_queue); 146 } 147 } 148