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
_init_intf_hdl(struct _adapter * padapter,struct intf_hdl * pintf_hdl)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 = kmalloc(sizeof(*pintf_priv), GFP_ATOMIC);
52 pintf_hdl->pintfpriv = pintf_priv;
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
_unload_intf_hdl(struct intf_priv * pintfpriv)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
register_intf_hdl(u8 * dev,struct intf_hdl * pintfhdl)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
unregister_intf_hdl(struct intf_hdl * pintfhdl)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
r8712_alloc_io_queue(struct _adapter * adapter)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
r8712_free_io_queue(struct _adapter * adapter)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