summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/wil6210/ioctl.c
blob: e9c0673819c624613ce25e5612f7886b592424d8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/*
 * Copyright (c) 2014 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/uaccess.h>

#include "wil6210.h"
#include <uapi/linux/wil6210_uapi.h>

#define wil_hex_dump_ioctl(prefix_str, buf, len) \
	print_hex_dump_debug("DBG[IOC ]" prefix_str, \
			     DUMP_PREFIX_OFFSET, 16, 1, buf, len, true)
#define wil_dbg_ioctl(wil, fmt, arg...) wil_dbg(wil, "DBG[IOC ]" fmt, ##arg)

static void __iomem *wil_ioc_addr(struct wil6210_priv *wil, uint32_t addr,
				  uint32_t size, enum wil_memio_op op)
{
	void __iomem *a;
	u32 off;

	switch (op & wil_mmio_addr_mask) {
	case wil_mmio_addr_linker:
		a = wmi_buffer(wil, cpu_to_le32(addr));
		break;
	case wil_mmio_addr_ahb:
		a = wmi_addr(wil, addr);
		break;
	case wil_mmio_addr_bar:
		a = wmi_addr(wil, addr + WIL6210_FW_HOST_OFF);
		break;
	default:
		wil_err(wil, "Unsupported address mode, op = 0x%08x\n", op);
		return NULL;
	}

	off = a - wil->csr;
	if (size >= WIL6210_MEM_SIZE - off) {
		wil_err(wil, "Requested block does not fit into memory: "
			"off = 0x%08x size = 0x%08x\n", off, size);
		return NULL;
	}

	return a;
}

static int wil_ioc_memio_dword(struct wil6210_priv *wil, void __user *data)
{
	struct wil_memio io;
	void __iomem *a;
	bool need_copy = false;

	if (copy_from_user(&io, data, sizeof(io)))
		return -EFAULT;

	wil_dbg_ioctl(wil, "IO: addr = 0x%08x val = 0x%08x op = 0x%08x\n",
		      io.addr, io.val, io.op);

	a = wil_ioc_addr(wil, io.addr, sizeof(u32), io.op);
	if (!a) {
		wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr,
			io.op);
		return -EINVAL;
	}
	/* operation */
	switch (io.op & wil_mmio_op_mask) {
	case wil_mmio_read:
		io.val = ioread32(a);
		need_copy = true;
		break;
	case wil_mmio_write:
		iowrite32(io.val, a);
		wmb(); /* make sure write propagated to HW */
		break;
	default:
		wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op);
		return -EINVAL;
	}

	if (need_copy) {
		wil_dbg_ioctl(wil, "IO done: addr = 0x%08x"
			      " val = 0x%08x op = 0x%08x\n",
			      io.addr, io.val, io.op);
		if (copy_to_user(data, &io, sizeof(io)))
			return -EFAULT;
	}

	return 0;
}

static int wil_ioc_memio_block(struct wil6210_priv *wil, void __user *data)
{
	struct wil_memio_block io;
	void *block;
	void __iomem *a;
	int rc = 0;

	if (copy_from_user(&io, data, sizeof(io)))
		return -EFAULT;

	wil_dbg_ioctl(wil, "IO: addr = 0x%08x size = 0x%08x op = 0x%08x\n",
		      io.addr, io.size, io.op);

	/* size */
	if (io.size % 4) {
		wil_err(wil, "size is not multiple of 4:  0x%08x\n", io.size);
		return -EINVAL;
	}

	a = wil_ioc_addr(wil, io.addr, io.size, io.op);
	if (!a) {
		wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr,
			io.op);
		return -EINVAL;
	}

	block = kmalloc(io.size, GFP_USER);
	if (!block)
		return -ENOMEM;

	/* operation */
	switch (io.op & wil_mmio_op_mask) {
	case wil_mmio_read:
		wil_memcpy_fromio_32(block, a, io.size);
		wil_hex_dump_ioctl("Read  ", block, io.size);
		if (copy_to_user(io.block, block, io.size)) {
			rc = -EFAULT;
			goto out_free;
		}
		break;
	case wil_mmio_write:
		if (copy_from_user(block, io.block, io.size)) {
			rc = -EFAULT;
			goto out_free;
		}
		wil_memcpy_toio_32(a, block, io.size);
		wmb(); /* make sure write propagated to HW */
		wil_hex_dump_ioctl("Write ", block, io.size);
		break;
	default:
		wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op);
		rc = -EINVAL;
		break;
	}

out_free:
	kfree(block);
	return rc;
}

int wil_ioctl(struct wil6210_priv *wil, void __user *data, int cmd)
{
	switch (cmd) {
	case WIL_IOCTL_MEMIO:
		return wil_ioc_memio_dword(wil, data);
	case WIL_IOCTL_MEMIO_BLOCK:
		return wil_ioc_memio_block(wil, data);
	default:
		wil_dbg_ioctl(wil, "Unsupported IOCTL 0x%04x\n", cmd);
		return -ENOIOCTLCMD;
	}
}