/*
* This file is part of wl1251
*
* Copyright (C) 2008 Nokia Corporation
*
* Contact: Kalle Valo <kalle.valo@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "wl1251_netlink.h"
#include <linux/mutex.h>
#include <linux/socket.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/genetlink.h>
#include <net/wireless.h>
#include <net/mac80211.h>
#include "wl1251.h"
#include "wl1251_spi.h"
#include "wl1251_acx.h"
/* FIXME: this should be changed as soon as user space catches up */
#define WL1251_NL_NAME "wl1251"
#define WL1251_NL_VERSION 1
#define WL1251_MAX_TEST_LENGTH 1024
#define WL1251_MAX_NVS_LENGTH 1024
enum wl1251_nl_commands {
WL1251_NL_CMD_UNSPEC,
WL1251_NL_CMD_TEST,
WL1251_NL_CMD_INTERROGATE,
WL1251_NL_CMD_CONFIGURE,
WL1251_NL_CMD_PHY_REG_READ,
WL1251_NL_CMD_NVS_PUSH,
WL1251_NL_CMD_REG_WRITE,
WL1251_NL_CMD_REG_READ,
WL1251_NL_CMD_SET_PLT_MODE,
__WL1251_NL_CMD_AFTER_LAST
};
#define WL1251_NL_CMD_MAX (__WL1251_NL_CMD_AFTER_LAST - 1)
enum wl1251_nl_attrs {
WL1251_NL_ATTR_UNSPEC,
WL1251_NL_ATTR_IFNAME,
WL1251_NL_ATTR_CMD_TEST_PARAM,
WL1251_NL_ATTR_CMD_TEST_ANSWER,
WL1251_NL_ATTR_CMD_IE,
WL1251_NL_ATTR_CMD_IE_LEN,
WL1251_NL_ATTR_CMD_IE_BUFFER,
WL1251_NL_ATTR_CMD_IE_ANSWER,
WL1251_NL_ATTR_REG_ADDR,
WL1251_NL_ATTR_REG_VAL,
WL1251_NL_ATTR_NVS_BUFFER,
WL1251_NL_ATTR_NVS_LEN,
WL1251_NL_ATTR_PLT_MODE,
__WL1251_NL_ATTR_AFTER_LAST
};
#define WL1251_NL_ATTR_MAX (__WL1251_NL_ATTR_AFTER_LAST - 1)
static struct genl_family wl1251_nl_family = {
.id = GENL_ID_GENERATE,
.name = WL1251_NL_NAME,
.hdrsize = 0,
.version = WL1251_NL_VERSION,
.maxattr = WL1251_NL_ATTR_MAX,
};
static struct net_device *ifname_to_netdev(struct net *net,
struct genl_info *info)
{
char *ifname;
if (!info->attrs[WL1251_NL_ATTR_IFNAME])
return NULL;
ifname = nla_data(info->attrs[WL1251_NL_ATTR_IFNAME]);
wl1251_debug(DEBUG_NETLINK, "Looking for %s", ifname);
return dev_get_by_name(net, ifname);
}
static struct wl1251 *ifname_to_wl1251(struct net *net, struct genl_info *info)
{
struct net_device *netdev;
struct wireless_dev *wdev;
struct wiphy *wiphy;
struct ieee80211_hw *hw;
netdev = ifname_to_netdev(net, info);
if (netdev == NULL) {
wl1251_error("Wrong interface");
return NULL;
}
wdev = netdev->ieee80211_ptr;
if (wdev == NULL) {
wl1251_error("ieee80211_ptr is NULL");
return NULL;
}
wiphy = wdev->wiphy;
if (wiphy == NULL) {
wl1251_error("wiphy is NULL");
return NULL;
}
hw = wiphy_priv(wiphy);
if (hw == NULL) {
wl1251_error("hw is NULL");
return NULL;
}
dev_put(netdev);
return hw->priv;
}
static int wl1251_nl_test_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
struct wl1251_command *cmd;
char *buf;
int buf_len, ret, cmd_len;
u8 answer;
if (!info->attrs[WL1251_NL_ATTR_CMD_TEST_PARAM])
return -EINVAL;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
return -EINVAL;
}
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
buf = nla_data(info->attrs[WL1251_NL_ATTR_CMD_TEST_PARAM]);
buf_len = nla_len(info->attrs[WL1251_NL_ATTR_CMD_TEST_PARAM]);
answer = nla_get_u8(info->attrs[WL1251_NL_ATTR_CMD_TEST_ANSWER]);
cmd->header.id = CMD_TEST;
memcpy(cmd->parameters, buf, buf_len);
cmd_len = sizeof(struct wl1251_cmd_header) + buf_len;
mutex_lock(&wl->mutex);
ret = wl1251_cmd_test(wl, cmd, cmd_len, answer);
mutex_unlock(&wl->mutex);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto out;
}
if (answer) {
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg) {
ret = -ENOMEM;
goto out;
}
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
&wl1251_nl_family, 0, WL1251_NL_CMD_TEST);
if (IS_ERR(hdr)) {
ret = PTR_ERR(hdr);
goto nla_put_failure;
}
NLA_PUT_STRING(msg, WL1251_NL_ATTR_IFNAME,
nla_data(info->attrs[WL1251_NL_ATTR_IFNAME]));
NLA_PUT(msg, WL1251_NL_ATTR_CMD_TEST_ANSWER,
sizeof(*cmd), cmd);
ret = genlmsg_end(msg, hdr);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
wl1251_debug(DEBUG_NETLINK, "TEST cmd sent, answer");
ret = genlmsg_reply(msg, info);
goto out;
nla_put_failure:
nlmsg_free(msg);
} else
wl1251_debug(DEBUG_NETLINK, "TEST cmd sent");
out:
kfree(cmd);
return ret;
}
static int wl1251_nl_interrogate(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
struct sk_buff *msg;
int ret = -ENOBUFS, cmd_ie, cmd_ie_len;
struct wl1251_command *cmd;
void *hdr;
if (!info->attrs[WL1251_NL_ATTR_CMD_IE])
return -EINVAL;
if (!info->attrs[WL1251_NL_ATTR_CMD_IE_LEN])
return -EINVAL;
cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
if (!cmd)
return -ENOMEM;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
ret = -EINVAL;
goto nla_put_failure;
}
/* acx id */
cmd_ie = nla_get_u32(info->attrs[WL1251_NL_ATTR_CMD_IE]);
/* maximum length of acx, including all headers */
cmd_ie_len = nla_get_u32(info->attrs[WL1251_NL_ATTR_CMD_IE_LEN]);
wl1251_debug(DEBUG_NETLINK, "Getting IE 0x%x (len %d)",
cmd_ie, cmd_ie_len);
mutex_lock(&wl->mutex);
ret = wl1251_cmd_interrogate(wl, cmd_ie, cmd, cmd_ie_len);
mutex_unlock(&wl->mutex);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
&wl1251_nl_family, 0, WL1251_NL_CMD_INTERROGATE);
if (IS_ERR(hdr)) {
ret = PTR_ERR(hdr);
goto nla_put_failure;
}
NLA_PUT_STRING(msg, WL1251_NL_ATTR_IFNAME,
nla_data(info->attrs[WL1251_NL_ATTR_IFNAME]));
NLA_PUT(msg, WL1251_NL_ATTR_CMD_IE_ANSWER, cmd_ie_len, cmd);
ret = genlmsg_end(msg, hdr);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
kfree(cmd);
return genlmsg_reply(msg, info);
nla_put_failure:
kfree(cmd);
nlmsg_free(msg);
return ret;
}
static int wl1251_nl_configure(struct sk_buff *skb, struct genl_info *info)
{
int ret = 0, cmd_ie_len, acx_len;
struct acx_header *acx = NULL;
struct sk_buff *msg;
struct wl1251 *wl;
void *cmd_ie;
u16 *id;
if (!info->attrs[WL1251_NL_ATTR_CMD_IE_BUFFER])
return -EINVAL;
if (!info->attrs[WL1251_NL_ATTR_CMD_IE_LEN])
return -EINVAL;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
ret = -EINVAL;
goto nla_put_failure;
}
/* contains the acx header but not the cmd header */
cmd_ie = nla_data(info->attrs[WL1251_NL_ATTR_CMD_IE_BUFFER]);
cmd_ie_len = nla_get_u32(info->attrs[WL1251_NL_ATTR_CMD_IE_LEN]);
/* acx id is in the first two bytes */
id = cmd_ie;
/* need to add acx_header before cmd_ie, so create a new command */
acx_len = sizeof(struct acx_header) + cmd_ie_len;
acx = kzalloc(acx_len, GFP_KERNEL);
if (!acx) {
ret = -ENOMEM;
goto nla_put_failure;
}
/* copy the acx header and the payload */
memcpy(&acx->id, cmd_ie, cmd_ie_len);
mutex_lock(&wl->mutex);
ret = wl1251_cmd_configure(wl, *id, acx, acx_len);
mutex_unlock(&wl->mutex);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
wl1251_debug(DEBUG_NETLINK, "CONFIGURE cmd sent");
nla_put_failure:
kfree(acx);
nlmsg_free(msg);
return ret;
}
static int wl1251_nl_phy_reg_read(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
struct sk_buff *msg;
u32 reg_addr, *reg_value = NULL;
int ret = 0;
void *hdr;
if (!info->attrs[WL1251_NL_ATTR_REG_ADDR])
return -EINVAL;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
ret = -EINVAL;
goto nla_put_failure;
}
reg_value = kmalloc(sizeof(*reg_value), GFP_KERNEL);
if (!reg_value) {
ret = -ENOMEM;
goto nla_put_failure;
}
reg_addr = nla_get_u32(info->attrs[WL1251_NL_ATTR_REG_ADDR]);
wl1251_debug(DEBUG_NETLINK, "Reading PHY reg 0x%x", reg_addr);
mutex_lock(&wl->mutex);
ret = wl1251_cmd_read_memory(wl, reg_addr, reg_value,
sizeof(*reg_value));
mutex_unlock(&wl->mutex);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
&wl1251_nl_family, 0, WL1251_NL_CMD_PHY_REG_READ);
if (IS_ERR(hdr)) {
ret = PTR_ERR(hdr);
goto nla_put_failure;
}
NLA_PUT_STRING(msg, WL1251_NL_ATTR_IFNAME,
nla_data(info->attrs[WL1251_NL_ATTR_IFNAME]));
NLA_PUT_U32(msg, WL1251_NL_ATTR_REG_VAL, *reg_value);
ret = genlmsg_end(msg, hdr);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
kfree(reg_value);
return genlmsg_reply(msg, info);
nla_put_failure:
nlmsg_free(msg);
kfree(reg_value);
return ret;
}
static int wl1251_nl_nvs_push(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
int ret = 0;
if (!info->attrs[WL1251_NL_ATTR_NVS_BUFFER])
return -EINVAL;
if (!info->attrs[WL1251_NL_ATTR_NVS_LEN])
return -EINVAL;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
return -EINVAL;
}
mutex_lock(&wl->mutex);
wl->nvs_len = nla_get_u32(info->attrs[WL1251_NL_ATTR_NVS_LEN]);
if (wl->nvs_len % 4) {
wl1251_error("NVS size is not multiple of 32: %d", wl->nvs_len);
ret = -EILSEQ;
goto out;
}
/* If we already have an NVS, we should free it */
kfree(wl->nvs);
wl->nvs = kzalloc(wl->nvs_len, GFP_KERNEL);
if (wl->nvs == NULL) {
wl1251_error("Can't allocate NVS");
ret = -ENOMEM;
goto out;
}
memcpy(wl->nvs,
nla_data(info->attrs[WL1251_NL_ATTR_NVS_BUFFER]),
wl->nvs_len);
wl1251_debug(DEBUG_NETLINK, "got NVS from userspace, %d bytes",
wl->nvs_len);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1251_nl_reg_read(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
u32 addr, val;
int ret = 0;
struct sk_buff *msg;
void *hdr;
if (!info->attrs[WL1251_NL_ATTR_REG_ADDR])
return -EINVAL;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
return -EINVAL;
}
addr = nla_get_u32(info->attrs[WL1251_NL_ATTR_REG_ADDR]);
mutex_lock(&wl->mutex);
val = wl1251_reg_read32(wl, addr);
mutex_unlock(&wl->mutex);
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
&wl1251_nl_family, 0, WL1251_NL_CMD_PHY_REG_READ);
if (IS_ERR(hdr)) {
ret = PTR_ERR(hdr);
goto nla_put_failure;
}
NLA_PUT_STRING(msg, WL1251_NL_ATTR_IFNAME,
nla_data(info->attrs[WL1251_NL_ATTR_IFNAME]));
NLA_PUT_U32(msg, WL1251_NL_ATTR_REG_VAL, val);
ret = genlmsg_end(msg, hdr);
if (ret < 0) {
wl1251_error("%s() failed", __func__);
goto nla_put_failure;
}
return genlmsg_reply(msg, info);
nla_put_failure:
nlmsg_free(msg);
return ret;
}
static int wl1251_nl_reg_write(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
u32 addr, val;
if (!info->attrs[WL1251_NL_ATTR_REG_ADDR])
return -EINVAL;
if (!info->attrs[WL1251_NL_ATTR_REG_VAL])
return -EINVAL;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
return -EINVAL;
}
addr = nla_get_u32(info->attrs[WL1251_NL_ATTR_REG_ADDR]);
val = nla_get_u32(info->attrs[WL1251_NL_ATTR_REG_VAL]);
mutex_lock(&wl->mutex);
wl1251_reg_write32(wl, addr, val);
mutex_unlock(&wl->mutex);
return 0;
}
static int wl1251_nl_set_plt_mode(struct sk_buff *skb, struct genl_info *info)
{
struct wl1251 *wl;
u32 val;
int ret;
if (!info->attrs[WL1251_NL_ATTR_PLT_MODE])
return -EINVAL;
wl = ifname_to_wl1251(&init_net, info);
if (wl == NULL) {
wl1251_error("wl1251 not found");
return -EINVAL;
}
val = nla_get_u32(info->attrs[WL1251_NL_ATTR_PLT_MODE]);
switch (val) {
case 0:
ret = wl1251_plt_stop(wl);
break;
case 1:
ret = wl1251_plt_start(wl);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static struct nla_policy wl1251_nl_policy[WL1251_NL_ATTR_MAX + 1] = {
[WL1251_NL_ATTR_IFNAME] = { .type = NLA_NUL_STRING,
.len = IFNAMSIZ-1 },
[WL1251_NL_ATTR_CMD_TEST_PARAM] = { .type = NLA_BINARY,
.len = WL1251_MAX_TEST_LENGTH },
[WL1251_NL_ATTR_CMD_TEST_ANSWER] = { .type = NLA_U8 },
[WL1251_NL_ATTR_CMD_IE] = { .type = NLA_U32 },
[WL1251_NL_ATTR_CMD_IE_LEN] = { .type = NLA_U32 },
[WL1251_NL_ATTR_CMD_IE_BUFFER] = { .type = NLA_BINARY,
.len = WL1251_MAX_TEST_LENGTH },
[WL1251_NL_ATTR_CMD_IE_ANSWER] = { .type = NLA_BINARY,
.len = WL1251_MAX_TEST_LENGTH },
[WL1251_NL_ATTR_REG_ADDR] = { .type = NLA_U32 },
[WL1251_NL_ATTR_REG_VAL] = { .type = NLA_U32 },
[WL1251_NL_ATTR_NVS_BUFFER] = { .type = NLA_BINARY,
.len = WL1251_MAX_NVS_LENGTH },
[WL1251_NL_ATTR_NVS_LEN] = { .type = NLA_U32 },
[WL1251_NL_ATTR_PLT_MODE] = { .type = NLA_U32 },
};
static struct genl_ops wl1251_nl_ops[] = {
{
.cmd = WL1251_NL_CMD_TEST,
.doit = wl1251_nl_test_cmd,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_INTERROGATE,
.doit = wl1251_nl_interrogate,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_CONFIGURE,
.doit = wl1251_nl_configure,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_PHY_REG_READ,
.doit = wl1251_nl_phy_reg_read,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_NVS_PUSH,
.doit = wl1251_nl_nvs_push,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_REG_WRITE,
.doit = wl1251_nl_reg_write,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_REG_READ,
.doit = wl1251_nl_reg_read,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = WL1251_NL_CMD_SET_PLT_MODE,
.doit = wl1251_nl_set_plt_mode,
.policy = wl1251_nl_policy,
.flags = GENL_ADMIN_PERM,
},
};
int wl1251_nl_register(void)
{
int err, i;
err = genl_register_family(&wl1251_nl_family);
if (err)
return err;
for (i = 0; i < ARRAY_SIZE(wl1251_nl_ops); i++) {
err = genl_register_ops(&wl1251_nl_family, &wl1251_nl_ops[i]);
if (err)
goto err_out;
}
return 0;
err_out:
genl_unregister_family(&wl1251_nl_family);
return err;
}
void wl1251_nl_unregister(void)
{
genl_unregister_family(&wl1251_nl_family);
}
