| Vladimir Kondratiev | dba4b74 | 2014-10-01 15:05:25 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 Qualcomm Atheros, Inc. |
| 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for any |
| 5 | * purpose with or without fee is hereby granted, provided that the above |
| 6 | * copyright notice and this permission notice appear in all copies. |
| 7 | * |
| 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/uaccess.h> |
| 18 | |
| 19 | #include "wil6210.h" |
| 20 | #include <uapi/linux/wil6210_uapi.h> |
| 21 | |
| 22 | #define wil_hex_dump_ioctl(prefix_str, buf, len) \ |
| 23 | print_hex_dump_debug("DBG[IOC ]" prefix_str, \ |
| 24 | DUMP_PREFIX_OFFSET, 16, 1, buf, len, true) |
| 25 | #define wil_dbg_ioctl(wil, fmt, arg...) wil_dbg(wil, "DBG[IOC ]" fmt, ##arg) |
| 26 | |
| 27 | static void __iomem *wil_ioc_addr(struct wil6210_priv *wil, uint32_t addr, |
| 28 | uint32_t size, enum wil_memio_op op) |
| 29 | { |
| 30 | void __iomem *a; |
| 31 | u32 off; |
| 32 | |
| 33 | switch (op & wil_mmio_addr_mask) { |
| 34 | case wil_mmio_addr_linker: |
| 35 | a = wmi_buffer(wil, cpu_to_le32(addr)); |
| 36 | break; |
| 37 | case wil_mmio_addr_ahb: |
| 38 | a = wmi_addr(wil, addr); |
| 39 | break; |
| 40 | case wil_mmio_addr_bar: |
| 41 | a = wmi_addr(wil, addr + WIL6210_FW_HOST_OFF); |
| 42 | break; |
| 43 | default: |
| 44 | wil_err(wil, "Unsupported address mode, op = 0x%08x\n", op); |
| 45 | return NULL; |
| 46 | } |
| 47 | |
| 48 | off = a - wil->csr; |
| 49 | if (size >= WIL6210_MEM_SIZE - off) { |
| 50 | wil_err(wil, "Requested block does not fit into memory: " |
| 51 | "off = 0x%08x size = 0x%08x\n", off, size); |
| 52 | return NULL; |
| 53 | } |
| 54 | |
| 55 | return a; |
| 56 | } |
| 57 | |
| 58 | static int wil_ioc_memio_dword(struct wil6210_priv *wil, void __user *data) |
| 59 | { |
| 60 | struct wil_memio io; |
| 61 | void __iomem *a; |
| 62 | bool need_copy = false; |
| 63 | |
| 64 | if (copy_from_user(&io, data, sizeof(io))) |
| 65 | return -EFAULT; |
| 66 | |
| 67 | wil_dbg_ioctl(wil, "IO: addr = 0x%08x val = 0x%08x op = 0x%08x\n", |
| 68 | io.addr, io.val, io.op); |
| 69 | |
| 70 | a = wil_ioc_addr(wil, io.addr, sizeof(u32), io.op); |
| 71 | if (!a) { |
| 72 | wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr, |
| 73 | io.op); |
| 74 | return -EINVAL; |
| 75 | } |
| 76 | /* operation */ |
| 77 | switch (io.op & wil_mmio_op_mask) { |
| 78 | case wil_mmio_read: |
| 79 | io.val = ioread32(a); |
| 80 | need_copy = true; |
| 81 | break; |
| 82 | case wil_mmio_write: |
| 83 | iowrite32(io.val, a); |
| 84 | wmb(); /* make sure write propagated to HW */ |
| 85 | break; |
| 86 | default: |
| 87 | wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op); |
| 88 | return -EINVAL; |
| 89 | } |
| 90 | |
| 91 | if (need_copy) { |
| 92 | wil_dbg_ioctl(wil, "IO done: addr = 0x%08x" |
| 93 | " val = 0x%08x op = 0x%08x\n", |
| 94 | io.addr, io.val, io.op); |
| 95 | if (copy_to_user(data, &io, sizeof(io))) |
| 96 | return -EFAULT; |
| 97 | } |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | static int wil_ioc_memio_block(struct wil6210_priv *wil, void __user *data) |
| 103 | { |
| 104 | struct wil_memio_block io; |
| 105 | void *block; |
| 106 | void __iomem *a; |
| 107 | int rc = 0; |
| 108 | |
| 109 | if (copy_from_user(&io, data, sizeof(io))) |
| 110 | return -EFAULT; |
| 111 | |
| 112 | wil_dbg_ioctl(wil, "IO: addr = 0x%08x size = 0x%08x op = 0x%08x\n", |
| 113 | io.addr, io.size, io.op); |
| 114 | |
| 115 | /* size */ |
| 116 | if (io.size % 4) { |
| 117 | wil_err(wil, "size is not multiple of 4: 0x%08x\n", io.size); |
| 118 | return -EINVAL; |
| 119 | } |
| 120 | |
| 121 | a = wil_ioc_addr(wil, io.addr, io.size, io.op); |
| 122 | if (!a) { |
| 123 | wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr, |
| 124 | io.op); |
| 125 | return -EINVAL; |
| 126 | } |
| 127 | |
| 128 | block = kmalloc(io.size, GFP_USER); |
| 129 | if (!block) |
| 130 | return -ENOMEM; |
| 131 | |
| 132 | /* operation */ |
| 133 | switch (io.op & wil_mmio_op_mask) { |
| 134 | case wil_mmio_read: |
| 135 | wil_memcpy_fromio_32(block, a, io.size); |
| 136 | wil_hex_dump_ioctl("Read ", block, io.size); |
| 137 | if (copy_to_user(io.block, block, io.size)) { |
| 138 | rc = -EFAULT; |
| 139 | goto out_free; |
| 140 | } |
| 141 | break; |
| 142 | case wil_mmio_write: |
| 143 | if (copy_from_user(block, io.block, io.size)) { |
| 144 | rc = -EFAULT; |
| 145 | goto out_free; |
| 146 | } |
| 147 | wil_memcpy_toio_32(a, block, io.size); |
| 148 | wmb(); /* make sure write propagated to HW */ |
| 149 | wil_hex_dump_ioctl("Write ", block, io.size); |
| 150 | break; |
| 151 | default: |
| 152 | wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op); |
| 153 | rc = -EINVAL; |
| 154 | break; |
| 155 | } |
| 156 | |
| 157 | out_free: |
| 158 | kfree(block); |
| 159 | return rc; |
| 160 | } |
| 161 | |
| 162 | int wil_ioctl(struct wil6210_priv *wil, void __user *data, int cmd) |
| 163 | { |
| 164 | switch (cmd) { |
| 165 | case WIL_IOCTL_MEMIO: |
| 166 | return wil_ioc_memio_dword(wil, data); |
| 167 | case WIL_IOCTL_MEMIO_BLOCK: |
| 168 | return wil_ioc_memio_block(wil, data); |
| 169 | default: |
| 170 | wil_dbg_ioctl(wil, "Unsupported IOCTL 0x%04x\n", cmd); |
| 171 | return -ENOIOCTLCMD; |
| 172 | } |
| 173 | } |