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linux/drivers/net/wireless/p54/p54common.c
Christian Lamparter 12da401e0d p54: more cryptographic accelerator fixes 
If we let the firmware do the data encryption, we have to remove the ICV and
(M)MIC at the end of the frame before we can give it back to mac80211.
Or, these data frames have a few trailing bytes on cooked monitor interfaces.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-01-22 13:55:02 -05:00

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/*
* Common code for mac80211 Prism54 drivers
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
* Copyright (c) 2007, Christian Lamparter <chunkeey@web.de>
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
*
* Based on:
* - the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
* - stlc45xx driver
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
*
* 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.
*/
#include <linux/init.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include "p54.h"
#include "p54common.h"
static int modparam_nohwcrypt;
module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Softmac Prism54 common code");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54common");
static struct ieee80211_rate p54_bgrates[] = {
{ .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 60, .hw_value = 4, },
{ .bitrate = 90, .hw_value = 5, },
{ .bitrate = 120, .hw_value = 6, },
{ .bitrate = 180, .hw_value = 7, },
{ .bitrate = 240, .hw_value = 8, },
{ .bitrate = 360, .hw_value = 9, },
{ .bitrate = 480, .hw_value = 10, },
{ .bitrate = 540, .hw_value = 11, },
};
static struct ieee80211_channel p54_bgchannels[] = {
{ .center_freq = 2412, .hw_value = 1, },
{ .center_freq = 2417, .hw_value = 2, },
{ .center_freq = 2422, .hw_value = 3, },
{ .center_freq = 2427, .hw_value = 4, },
{ .center_freq = 2432, .hw_value = 5, },
{ .center_freq = 2437, .hw_value = 6, },
{ .center_freq = 2442, .hw_value = 7, },
{ .center_freq = 2447, .hw_value = 8, },
{ .center_freq = 2452, .hw_value = 9, },
{ .center_freq = 2457, .hw_value = 10, },
{ .center_freq = 2462, .hw_value = 11, },
{ .center_freq = 2467, .hw_value = 12, },
{ .center_freq = 2472, .hw_value = 13, },
{ .center_freq = 2484, .hw_value = 14, },
};
static struct ieee80211_supported_band band_2GHz = {
.channels = p54_bgchannels,
.n_channels = ARRAY_SIZE(p54_bgchannels),
.bitrates = p54_bgrates,
.n_bitrates = ARRAY_SIZE(p54_bgrates),
};
static struct ieee80211_rate p54_arates[] = {
{ .bitrate = 60, .hw_value = 4, },
{ .bitrate = 90, .hw_value = 5, },
{ .bitrate = 120, .hw_value = 6, },
{ .bitrate = 180, .hw_value = 7, },
{ .bitrate = 240, .hw_value = 8, },
{ .bitrate = 360, .hw_value = 9, },
{ .bitrate = 480, .hw_value = 10, },
{ .bitrate = 540, .hw_value = 11, },
};
static struct ieee80211_channel p54_achannels[] = {
{ .center_freq = 4920 },
{ .center_freq = 4940 },
{ .center_freq = 4960 },
{ .center_freq = 4980 },
{ .center_freq = 5040 },
{ .center_freq = 5060 },
{ .center_freq = 5080 },
{ .center_freq = 5170 },
{ .center_freq = 5180 },
{ .center_freq = 5190 },
{ .center_freq = 5200 },
{ .center_freq = 5210 },
{ .center_freq = 5220 },
{ .center_freq = 5230 },
{ .center_freq = 5240 },
{ .center_freq = 5260 },
{ .center_freq = 5280 },
{ .center_freq = 5300 },
{ .center_freq = 5320 },
{ .center_freq = 5500 },
{ .center_freq = 5520 },
{ .center_freq = 5540 },
{ .center_freq = 5560 },
{ .center_freq = 5580 },
{ .center_freq = 5600 },
{ .center_freq = 5620 },
{ .center_freq = 5640 },
{ .center_freq = 5660 },
{ .center_freq = 5680 },
{ .center_freq = 5700 },
{ .center_freq = 5745 },
{ .center_freq = 5765 },
{ .center_freq = 5785 },
{ .center_freq = 5805 },
{ .center_freq = 5825 },
};
static struct ieee80211_supported_band band_5GHz = {
.channels = p54_achannels,
.n_channels = ARRAY_SIZE(p54_achannels),
.bitrates = p54_arates,
.n_bitrates = ARRAY_SIZE(p54_arates),
};
int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
struct p54_common *priv = dev->priv;
struct bootrec_exp_if *exp_if;
struct bootrec *bootrec;
u32 *data = (u32 *)fw->data;
u32 *end_data = (u32 *)fw->data + (fw->size >> 2);
u8 *fw_version = NULL;
size_t len;
int i;
int maxlen;
if (priv->rx_start)
return 0;
while (data < end_data && *data)
data++;
while (data < end_data && !*data)
data++;
bootrec = (struct bootrec *) data;
while (bootrec->data <= end_data &&
(bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) {
u32 code = le32_to_cpu(bootrec->code);
switch (code) {
case BR_CODE_COMPONENT_ID:
priv->fw_interface = be32_to_cpup((__be32 *)
bootrec->data);
switch (priv->fw_interface) {
case FW_LM86:
case FW_LM20:
case FW_LM87: {
char *iftype = (char *)bootrec->data;
printk(KERN_INFO "%s: p54 detected a LM%c%c "
"firmware\n",
wiphy_name(dev->wiphy),
iftype[2], iftype[3]);
break;
}
case FW_FMAC:
default:
printk(KERN_ERR "%s: unsupported firmware\n",
wiphy_name(dev->wiphy));
return -ENODEV;
}
break;
case BR_CODE_COMPONENT_VERSION:
/* 24 bytes should be enough for all firmwares */
if (strnlen((unsigned char*)bootrec->data, 24) < 24)
fw_version = (unsigned char*)bootrec->data;
break;
case BR_CODE_DESCR: {
struct bootrec_desc *desc =
(struct bootrec_desc *)bootrec->data;
priv->rx_start = le32_to_cpu(desc->rx_start);
/* FIXME add sanity checking */
priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
priv->headroom = desc->headroom;
priv->tailroom = desc->tailroom;
priv->privacy_caps = desc->privacy_caps;
priv->rx_keycache_size = desc->rx_keycache_size;
if (le32_to_cpu(bootrec->len) == 11)
priv->rx_mtu = le16_to_cpu(desc->rx_mtu);
else
priv->rx_mtu = (size_t)
0x620 - priv->tx_hdr_len;
maxlen = priv->tx_hdr_len + /* USB devices */
sizeof(struct p54_rx_data) +
4 + /* rx alignment */
IEEE80211_MAX_FRAG_THRESHOLD;
if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) {
printk(KERN_INFO "p54: rx_mtu reduced from %d "
"to %d\n", priv->rx_mtu,
maxlen);
priv->rx_mtu = maxlen;
}
break;
}
case BR_CODE_EXPOSED_IF:
exp_if = (struct bootrec_exp_if *) bootrec->data;
for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
if (exp_if[i].if_id == cpu_to_le16(0x1a))
priv->fw_var = le16_to_cpu(exp_if[i].variant);
break;
case BR_CODE_DEPENDENT_IF:
break;
case BR_CODE_END_OF_BRA:
case LEGACY_BR_CODE_END_OF_BRA:
end_data = NULL;
break;
default:
break;
}
bootrec = (struct bootrec *)&bootrec->data[len];
}
if (fw_version)
printk(KERN_INFO "%s: FW rev %s - Softmac protocol %x.%x\n",
wiphy_name(dev->wiphy), fw_version,
priv->fw_var >> 8, priv->fw_var & 0xff);
if (priv->fw_var < 0x500)
printk(KERN_INFO "%s: you are using an obsolete firmware. "
"visit http://wireless.kernel.org/en/users/Drivers/p54 "
"and grab one for \"kernel >= 2.6.28\"!\n",
wiphy_name(dev->wiphy));
if (priv->fw_var >= 0x300) {
/* Firmware supports QoS, use it! */
priv->tx_stats[4].limit = 3; /* AC_VO */
priv->tx_stats[5].limit = 4; /* AC_VI */
priv->tx_stats[6].limit = 3; /* AC_BE */
priv->tx_stats[7].limit = 2; /* AC_BK */
dev->queues = 4;
}
if (!modparam_nohwcrypt)
printk(KERN_INFO "%s: cryptographic accelerator "
"WEP:%s, TKIP:%s, CCMP:%s\n",
wiphy_name(dev->wiphy),
(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" :
"no", (priv->privacy_caps & (BR_DESC_PRIV_CAP_TKIP |
BR_DESC_PRIV_CAP_MICHAEL)) ? "YES" : "no",
(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ?
"YES" : "no");
return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);
static int p54_convert_rev0(struct ieee80211_hw *dev,
struct pda_pa_curve_data *curve_data)
{
struct p54_common *priv = dev->priv;
struct p54_pa_curve_data_sample *dst;
struct pda_pa_curve_data_sample_rev0 *src;
size_t cd_len = sizeof(*curve_data) +
(curve_data->points_per_channel*sizeof(*dst) + 2) *
curve_data->channels;
unsigned int i, j;
void *source, *target;
priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
if (!priv->curve_data)
return -ENOMEM;
memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
source = curve_data->data;
target = priv->curve_data->data;
for (i = 0; i < curve_data->channels; i++) {
__le16 *freq = source;
source += sizeof(__le16);
*((__le16 *)target) = *freq;
target += sizeof(__le16);
for (j = 0; j < curve_data->points_per_channel; j++) {
dst = target;
src = source;
dst->rf_power = src->rf_power;
dst->pa_detector = src->pa_detector;
dst->data_64qam = src->pcv;
/* "invent" the points for the other modulations */
#define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
dst->data_16qam = SUB(src->pcv, 12);
dst->data_qpsk = SUB(dst->data_16qam, 12);
dst->data_bpsk = SUB(dst->data_qpsk, 12);
dst->data_barker = SUB(dst->data_bpsk, 14);
#undef SUB
target += sizeof(*dst);
source += sizeof(*src);
}
}
return 0;
}
static int p54_convert_rev1(struct ieee80211_hw *dev,
struct pda_pa_curve_data *curve_data)
{
struct p54_common *priv = dev->priv;
struct p54_pa_curve_data_sample *dst;
struct pda_pa_curve_data_sample_rev1 *src;
size_t cd_len = sizeof(*curve_data) +
(curve_data->points_per_channel*sizeof(*dst) + 2) *
curve_data->channels;
unsigned int i, j;
void *source, *target;
priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
if (!priv->curve_data)
return -ENOMEM;
memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
source = curve_data->data;
target = priv->curve_data->data;
for (i = 0; i < curve_data->channels; i++) {
__le16 *freq = source;
source += sizeof(__le16);
*((__le16 *)target) = *freq;
target += sizeof(__le16);
for (j = 0; j < curve_data->points_per_channel; j++) {
memcpy(target, source, sizeof(*src));
target += sizeof(*dst);
source += sizeof(*src);
}
source++;
}
return 0;
}
static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2",
"Frisbee", "Xbow", "Longbow", "NULL", "NULL" };
static int p54_init_xbow_synth(struct ieee80211_hw *dev);
static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
u16 type)
{
struct p54_common *priv = dev->priv;
int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
int i;
if (len != (entry_size * num_entries)) {
printk(KERN_ERR "%s: unknown rssi calibration data packing "
" type:(%x) len:%d.\n",
wiphy_name(dev->wiphy), type, len);
print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
data, len);
printk(KERN_ERR "%s: please report this issue.\n",
wiphy_name(dev->wiphy));
return;
}
for (i = 0; i < num_entries; i++) {
struct pda_rssi_cal_entry *cal = data +
(offset + i * entry_size);
priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
}
}
static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
{
struct p54_common *priv = dev->priv;
struct eeprom_pda_wrap *wrap = NULL;
struct pda_entry *entry;
unsigned int data_len, entry_len;
void *tmp;
int err;
u8 *end = (u8 *)eeprom + len;
u16 synth = 0;
wrap = (struct eeprom_pda_wrap *) eeprom;
entry = (void *)wrap->data + le16_to_cpu(wrap->len);
/* verify that at least the entry length/code fits */
while ((u8 *)entry <= end - sizeof(*entry)) {
entry_len = le16_to_cpu(entry->len);
data_len = ((entry_len - 1) << 1);
/* abort if entry exceeds whole structure */
if ((u8 *)entry + sizeof(*entry) + data_len > end)
break;
switch (le16_to_cpu(entry->code)) {
case PDR_MAC_ADDRESS:
SET_IEEE80211_PERM_ADDR(dev, entry->data);
break;
case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
if (data_len < 2) {
err = -EINVAL;
goto err;
}
if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
err = -EINVAL;
goto err;
}
priv->output_limit = kmalloc(entry->data[1] *
sizeof(*priv->output_limit), GFP_KERNEL);
if (!priv->output_limit) {
err = -ENOMEM;
goto err;
}
memcpy(priv->output_limit, &entry->data[2],
entry->data[1]*sizeof(*priv->output_limit));
priv->output_limit_len = entry->data[1];
break;
case PDR_PRISM_PA_CAL_CURVE_DATA: {
struct pda_pa_curve_data *curve_data =
(struct pda_pa_curve_data *)entry->data;
if (data_len < sizeof(*curve_data)) {
err = -EINVAL;
goto err;
}
switch (curve_data->cal_method_rev) {
case 0:
err = p54_convert_rev0(dev, curve_data);
break;
case 1:
err = p54_convert_rev1(dev, curve_data);
break;
default:
printk(KERN_ERR "%s: unknown curve data "
"revision %d\n",
wiphy_name(dev->wiphy),
curve_data->cal_method_rev);
err = -ENODEV;
break;
}
if (err)
goto err;
}
break;
case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
if (!priv->iq_autocal) {
err = -ENOMEM;
goto err;
}
memcpy(priv->iq_autocal, entry->data, data_len);
priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
break;
case PDR_INTERFACE_LIST:
tmp = entry->data;
while ((u8 *)tmp < entry->data + data_len) {
struct bootrec_exp_if *exp_if = tmp;
if (le16_to_cpu(exp_if->if_id) == 0xf)
synth = le16_to_cpu(exp_if->variant);
tmp += sizeof(struct bootrec_exp_if);
}
break;
case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
priv->version = *(u8 *)(entry->data + 1);
break;
case PDR_RSSI_LINEAR_APPROXIMATION:
case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
p54_parse_rssical(dev, entry->data, data_len,
le16_to_cpu(entry->code));
break;
case PDR_END:
/* make it overrun */
entry_len = len;
break;
case PDR_MANUFACTURING_PART_NUMBER:
case PDR_PDA_VERSION:
case PDR_NIC_SERIAL_NUMBER:
case PDR_REGULATORY_DOMAIN_LIST:
case PDR_TEMPERATURE_TYPE:
case PDR_PRISM_PCI_IDENTIFIER:
case PDR_COUNTRY_INFORMATION:
case PDR_OEM_NAME:
case PDR_PRODUCT_NAME:
case PDR_UTF8_OEM_NAME:
case PDR_UTF8_PRODUCT_NAME:
case PDR_COUNTRY_LIST:
case PDR_DEFAULT_COUNTRY:
case PDR_ANTENNA_GAIN:
case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA:
case PDR_REGULATORY_POWER_LIMITS:
case PDR_RADIATED_TRANSMISSION_CORRECTION:
case PDR_PRISM_TX_IQ_CALIBRATION:
case PDR_BASEBAND_REGISTERS:
case PDR_PER_CHANNEL_BASEBAND_REGISTERS:
break;
default:
printk(KERN_INFO "%s: unknown eeprom code : 0x%x\n",
wiphy_name(dev->wiphy),
le16_to_cpu(entry->code));
break;
}
entry = (void *)entry + (entry_len + 1)*2;
}
if (!synth || !priv->iq_autocal || !priv->output_limit ||
!priv->curve_data) {
printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
wiphy_name(dev->wiphy));
err = -EINVAL;
goto err;
}
priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
if (priv->rxhw == 4)
p54_init_xbow_synth(dev);
if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
u8 perm_addr[ETH_ALEN];
printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
wiphy_name(dev->wiphy));
random_ether_addr(perm_addr);
SET_IEEE80211_PERM_ADDR(dev, perm_addr);
}
printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
wiphy_name(dev->wiphy),
dev->wiphy->perm_addr,
priv->version, p54_rf_chips[priv->rxhw]);
return 0;
err:
if (priv->iq_autocal) {
kfree(priv->iq_autocal);
priv->iq_autocal = NULL;
}
if (priv->output_limit) {
kfree(priv->output_limit);
priv->output_limit = NULL;
}
if (priv->curve_data) {
kfree(priv->curve_data);
priv->curve_data = NULL;
}
printk(KERN_ERR "%s: eeprom parse failed!\n",
wiphy_name(dev->wiphy));
return err;
}
static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
{
struct p54_common *priv = dev->priv;
int band = dev->conf.channel->band;
return ((rssi * priv->rssical_db[band].mul) / 64 +
priv->rssical_db[band].add) / 4;
}
static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_common *priv = dev->priv;
struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
struct ieee80211_rx_status rx_status = {0};
u16 freq = le16_to_cpu(hdr->freq);
size_t header_len = sizeof(*hdr);
u32 tsf32;
u8 rate = hdr->rate & 0xf;
/*
* If the device is in a unspecified state we have to
* ignore all data frames. Else we could end up with a
* nasty crash.
*/
if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
return 0;
if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) {
if (priv->filter_flags & FIF_FCSFAIL)
rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
else
return 0;
}
if (hdr->decrypt_status == P54_DECRYPT_OK)
rx_status.flag |= RX_FLAG_DECRYPTED;
if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
(hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
rx_status.flag |= RX_FLAG_MMIC_ERROR;
rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi);
rx_status.noise = priv->noise;
/* XX correct? */
rx_status.qual = (100 * hdr->rssi) / 127;
if (hdr->rate & 0x10)
rx_status.flag |= RX_FLAG_SHORTPRE;
if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
rx_status.rate_idx = (rate < 4) ? 0 : rate - 4;
else
rx_status.rate_idx = rate;
rx_status.freq = freq;
rx_status.band = dev->conf.channel->band;
rx_status.antenna = hdr->antenna;
tsf32 = le32_to_cpu(hdr->tsf32);
if (tsf32 < priv->tsf_low32)
priv->tsf_high32++;
rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
priv->tsf_low32 = tsf32;
rx_status.flag |= RX_FLAG_TSFT;
if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
header_len += hdr->align[0];
skb_pull(skb, header_len);
skb_trim(skb, le16_to_cpu(hdr->len));
ieee80211_rx_irqsafe(dev, skb, &rx_status);
queue_delayed_work(dev->workqueue, &priv->work,
msecs_to_jiffies(P54_STATISTICS_UPDATE));
return -1;
}
static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
int i;
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
return ;
for (i = 0; i < dev->queues; i++)
if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
ieee80211_wake_queue(dev, i);
}
void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_common *priv = dev->priv;
struct ieee80211_tx_info *info;
struct memrecord *range;
unsigned long flags;
u32 freed = 0, last_addr = priv->rx_start;
if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue)))
return;
/*
* don't try to free an already unlinked skb
*/
if (unlikely((!skb->next) || (!skb->prev)))
return;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
info = IEEE80211_SKB_CB(skb);
range = (void *)info->rate_driver_data;
if (skb->prev != (struct sk_buff *)&priv->tx_queue) {
struct ieee80211_tx_info *ni;
struct memrecord *mr;
ni = IEEE80211_SKB_CB(skb->prev);
mr = (struct memrecord *)ni->rate_driver_data;
last_addr = mr->end_addr;
}
if (skb->next != (struct sk_buff *)&priv->tx_queue) {
struct ieee80211_tx_info *ni;
struct memrecord *mr;
ni = IEEE80211_SKB_CB(skb->next);
mr = (struct memrecord *)ni->rate_driver_data;
freed = mr->start_addr - last_addr;
} else
freed = priv->rx_end - last_addr;
__skb_unlink(skb, &priv->tx_queue);
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
dev_kfree_skb_any(skb);
if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
p54_wake_free_queues(dev);
}
EXPORT_SYMBOL_GPL(p54_free_skb);
static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev,
__le32 req_id)
{
struct p54_common *priv = dev->priv;
struct sk_buff *entry = priv->tx_queue.next;
unsigned long flags;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
while (entry != (struct sk_buff *)&priv->tx_queue) {
struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
if (hdr->req_id == req_id) {
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
return entry;
}
entry = entry->next;
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
return NULL;
}
static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_common *priv = dev->priv;
struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
struct memrecord *range = NULL;
u32 freed = 0;
u32 last_addr = priv->rx_start;
unsigned long flags;
int count, idx;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
while (entry != (struct sk_buff *)&priv->tx_queue) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
struct p54_hdr *entry_hdr;
struct p54_tx_data *entry_data;
unsigned int pad = 0, frame_len;
range = (void *)info->rate_driver_data;
if (range->start_addr != addr) {
last_addr = range->end_addr;
entry = entry->next;
continue;
}
if (entry->next != (struct sk_buff *)&priv->tx_queue) {
struct ieee80211_tx_info *ni;
struct memrecord *mr;
ni = IEEE80211_SKB_CB(entry->next);
mr = (struct memrecord *)ni->rate_driver_data;
freed = mr->start_addr - last_addr;
} else
freed = priv->rx_end - last_addr;
last_addr = range->end_addr;
__skb_unlink(entry, &priv->tx_queue);
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
frame_len = entry->len;
entry_hdr = (struct p54_hdr *) entry->data;
entry_data = (struct p54_tx_data *) entry_hdr->data;
priv->tx_stats[entry_data->hw_queue].len--;
priv->stats.dot11ACKFailureCount += payload->tries - 1;
if (unlikely(entry == priv->cached_beacon)) {
kfree_skb(entry);
priv->cached_beacon = NULL;
goto out;
}
/*
* Clear manually, ieee80211_tx_info_clear_status would
* clear the counts too and we need them.
*/
memset(&info->status.ampdu_ack_len, 0,
sizeof(struct ieee80211_tx_info) -
offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
status.ampdu_ack_len) != 23);
if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
pad = entry_data->align[0];
/* walk through the rates array and adjust the counts */
count = payload->tries;
for (idx = 0; idx < 4; idx++) {
if (count >= info->status.rates[idx].count) {
count -= info->status.rates[idx].count;
} else if (count > 0) {
info->status.rates[idx].count = count;
count = 0;
} else {
info->status.rates[idx].idx = -1;
info->status.rates[idx].count = 0;
}
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
(!payload->status))
info->flags |= IEEE80211_TX_STAT_ACK;
if (payload->status & P54_TX_PSM_CANCELLED)
info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
info->status.ack_signal = p54_rssi_to_dbm(dev,
(int)payload->ack_rssi);
/* Undo all changes to the frame. */
switch (entry_data->key_type) {
case P54_CRYPTO_TKIPMICHAEL: {
u8 *iv = (u8 *)(entry_data->align + pad +
entry_data->crypt_offset);
/* Restore the original TKIP IV. */
iv[2] = iv[0];
iv[0] = iv[1];
iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
break;
}
case P54_CRYPTO_AESCCMP:
frame_len -= 8; /* remove CCMP_MIC */
break;
case P54_CRYPTO_WEP:
frame_len -= 4; /* remove WEP_ICV */
break;
}
skb_trim(entry, frame_len);
skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
ieee80211_tx_status_irqsafe(dev, entry);
goto out;
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
out:
if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 +
IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
p54_wake_free_queues(dev);
}
static void p54_rx_eeprom_readback(struct ieee80211_hw *dev,
struct sk_buff *skb)
{
struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
struct p54_common *priv = dev->priv;
if (!priv->eeprom)
return ;
if (priv->fw_var >= 0x509) {
memcpy(priv->eeprom, eeprom->v2.data,
le16_to_cpu(eeprom->v2.len));
} else {
memcpy(priv->eeprom, eeprom->v1.data,
le16_to_cpu(eeprom->v1.len));
}
complete(&priv->eeprom_comp);
}
static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_common *priv = dev->priv;
struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
u32 tsf32;
if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
return ;
tsf32 = le32_to_cpu(stats->tsf32);
if (tsf32 < priv->tsf_low32)
priv->tsf_high32++;
priv->tsf_low32 = tsf32;
priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise));
p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id));
}
static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
struct p54_trap *trap = (struct p54_trap *) hdr->data;
u16 event = le16_to_cpu(trap->event);
u16 freq = le16_to_cpu(trap->frequency);
switch (event) {
case P54_TRAP_BEACON_TX:
break;
case P54_TRAP_RADAR:
printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
wiphy_name(dev->wiphy), freq);
break;
case P54_TRAP_NO_BEACON:
break;
case P54_TRAP_SCAN:
break;
case P54_TRAP_TBTT:
break;
case P54_TRAP_TIMER:
break;
default:
printk(KERN_INFO "%s: received event:%x freq:%d\n",
wiphy_name(dev->wiphy), event, freq);
break;
}
}
static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
switch (le16_to_cpu(hdr->type)) {
case P54_CONTROL_TYPE_TXDONE:
p54_rx_frame_sent(dev, skb);
break;
case P54_CONTROL_TYPE_TRAP:
p54_rx_trap(dev, skb);
break;
case P54_CONTROL_TYPE_BBP:
break;
case P54_CONTROL_TYPE_STAT_READBACK:
p54_rx_stats(dev, skb);
break;
case P54_CONTROL_TYPE_EEPROM_READBACK:
p54_rx_eeprom_readback(dev, skb);
break;
default:
printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
break;
}
return 0;
}
/* returns zero if skb can be reused */
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
u16 type = le16_to_cpu(*((__le16 *)skb->data));
if (type & P54_HDR_FLAG_CONTROL)
return p54_rx_control(dev, skb);
else
return p54_rx_data(dev, skb);
}
EXPORT_SYMBOL_GPL(p54_rx);
/*
* So, the firmware is somewhat stupid and doesn't know what places in its
* memory incoming data should go to. By poking around in the firmware, we
* can find some unused memory to upload our packets to. However, data that we
* want the card to TX needs to stay intact until the card has told us that
* it is done with it. This function finds empty places we can upload to and
* marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
* allocated areas.
*/
static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
struct p54_hdr *data, u32 len)
{
struct p54_common *priv = dev->priv;
struct sk_buff *entry = priv->tx_queue.next;
struct sk_buff *target_skb = NULL;
struct ieee80211_tx_info *info;
struct memrecord *range;
u32 last_addr = priv->rx_start;
u32 largest_hole = 0;
u32 target_addr = priv->rx_start;
unsigned long flags;
unsigned int left;
len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
if (!skb)
return -EINVAL;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
left = skb_queue_len(&priv->tx_queue);
if (unlikely(left >= 28)) {
/*
* The tx_queue is nearly full!
* We have throttle normal data traffic, because we must
* have a few spare slots for control frames left.
*/
ieee80211_stop_queues(dev);
queue_delayed_work(dev->workqueue, &priv->work,
msecs_to_jiffies(P54_TX_TIMEOUT));
if (unlikely(left == 32)) {
/*
* The tx_queue is now really full.
*
* TODO: check if the device has crashed and reset it.
*/
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
return -ENOSPC;
}
}
while (left--) {
u32 hole_size;
info = IEEE80211_SKB_CB(entry);
range = (void *)info->rate_driver_data;
hole_size = range->start_addr - last_addr;
if (!target_skb && hole_size >= len) {
target_skb = entry->prev;
hole_size -= len;
target_addr = last_addr;
}
largest_hole = max(largest_hole, hole_size);
last_addr = range->end_addr;
entry = entry->next;
}
if (!target_skb && priv->rx_end - last_addr >= len) {
target_skb = priv->tx_queue.prev;
largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
if (!skb_queue_empty(&priv->tx_queue)) {
info = IEEE80211_SKB_CB(target_skb);
range = (void *)info->rate_driver_data;
target_addr = range->end_addr;
}
} else
largest_hole = max(largest_hole, priv->rx_end - last_addr);
if (!target_skb) {
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
ieee80211_stop_queues(dev);
return -ENOSPC;
}
info = IEEE80211_SKB_CB(skb);
range = (void *)info->rate_driver_data;
range->start_addr = target_addr;
range->end_addr = target_addr + len;
__skb_queue_after(&priv->tx_queue, target_skb, skb);
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
if (largest_hole < priv->headroom + sizeof(struct p54_hdr) +
48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom)
ieee80211_stop_queues(dev);
data->req_id = cpu_to_le32(target_addr + priv->headroom);
return 0;
}
static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev,
u16 hdr_flags, u16 len, u16 type, gfp_t memflags)
{
struct p54_common *priv = dev->priv;
struct p54_hdr *hdr;
struct sk_buff *skb;
skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags);
if (!skb)
return NULL;
skb_reserve(skb, priv->tx_hdr_len);
hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr));
hdr->flags = cpu_to_le16(hdr_flags);
hdr->len = cpu_to_le16(len - sizeof(*hdr));
hdr->type = cpu_to_le16(type);
hdr->tries = hdr->rts_tries = 0;
if (unlikely(p54_assign_address(dev, skb, hdr, len))) {
kfree_skb(skb);
return NULL;
}
return skb;
}
int p54_read_eeprom(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct p54_hdr *hdr = NULL;
struct p54_eeprom_lm86 *eeprom_hdr;
struct sk_buff *skb;
size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
int ret = -ENOMEM;
void *eeprom = NULL;
maxblocksize = EEPROM_READBACK_LEN;
if (priv->fw_var >= 0x509)
maxblocksize -= 0xc;
else
maxblocksize -= 0x4;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*hdr) +
sizeof(*eeprom_hdr) + maxblocksize,
P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL);
if (!skb)
goto free;
priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL);
if (!priv->eeprom)
goto free;
eeprom = kzalloc(eeprom_size, GFP_KERNEL);
if (!eeprom)
goto free;
eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb,
sizeof(*eeprom_hdr) + maxblocksize);
while (eeprom_size) {
blocksize = min(eeprom_size, maxblocksize);
if (priv->fw_var < 0x509) {
eeprom_hdr->v1.offset = cpu_to_le16(offset);
eeprom_hdr->v1.len = cpu_to_le16(blocksize);
} else {
eeprom_hdr->v2.offset = cpu_to_le32(offset);
eeprom_hdr->v2.len = cpu_to_le16(blocksize);
eeprom_hdr->v2.magic2 = 0xf;
memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4);
}
priv->tx(dev, skb);
if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) {
printk(KERN_ERR "%s: device does not respond!\n",
wiphy_name(dev->wiphy));
ret = -EBUSY;
goto free;
}
memcpy(eeprom + offset, priv->eeprom, blocksize);
offset += blocksize;
eeprom_size -= blocksize;
}
ret = p54_parse_eeprom(dev, eeprom, offset);
free:
kfree(priv->eeprom);
priv->eeprom = NULL;
p54_free_skb(dev, skb);
kfree(eeprom);
return ret;
}
EXPORT_SYMBOL_GPL(p54_read_eeprom);
static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
bool set)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_tim *tim;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
sizeof(struct p54_hdr) + sizeof(*tim),
P54_CONTROL_TYPE_TIM, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
tim = (struct p54_tim *) skb_put(skb, sizeof(*tim));
tim->count = 1;
tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid);
priv->tx(dev, skb);
return 0;
}
static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_sta_unlock *sta;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
sizeof(struct p54_hdr) + sizeof(*sta),
P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta));
memcpy(sta->addr, addr, ETH_ALEN);
priv->tx(dev, skb);
return 0;
}
static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
enum sta_notify_cmd notify_cmd,
struct ieee80211_sta *sta)
{
switch (notify_cmd) {
case STA_NOTIFY_ADD:
case STA_NOTIFY_REMOVE:
/*
* Notify the firmware that we don't want or we don't
* need to buffer frames for this station anymore.
*/
p54_sta_unlock(dev, sta->addr);
break;
case STA_NOTIFY_AWAKE:
/* update the firmware's filter table */
p54_sta_unlock(dev, sta->addr);
break;
default:
break;
}
}
static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_hdr *hdr;
struct p54_txcancel *cancel;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET,
sizeof(struct p54_hdr) + sizeof(*cancel),
P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
hdr = (void *)entry->data;
cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel));
cancel->req_id = hdr->req_id;
priv->tx(dev, skb);
return 0;
}
static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb,
struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len,
u16 *flags, u16 *aid)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct p54_common *priv = dev->priv;
int ret = 0;
if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
if (ieee80211_is_beacon(hdr->frame_control)) {
*aid = 0;
*queue = 0;
*extra_len = IEEE80211_MAX_TIM_LEN;
*flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
return 0;
} else if (ieee80211_is_probe_resp(hdr->frame_control)) {
*aid = 0;
*queue = 2;
*flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
P54_HDR_FLAG_DATA_OUT_NOCANCEL;
return 0;
} else {
*queue = 2;
ret = 0;
}
} else {
*queue += 4;
ret = 1;
}
switch (priv->mode) {
case NL80211_IFTYPE_STATION:
*aid = 1;
break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
*aid = 0;
*queue = 3;
return 0;
}
if (info->control.sta)
*aid = info->control.sta->aid;
else
*flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
}
return ret;
}
static u8 p54_convert_algo(enum ieee80211_key_alg alg)
{
switch (alg) {
case ALG_WEP:
return P54_CRYPTO_WEP;
case ALG_TKIP:
return P54_CRYPTO_TKIPMICHAEL;
case ALG_CCMP:
return P54_CRYPTO_AESCCMP;
default:
return 0;
}
}
static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_queue_stats *current_queue = NULL;
struct p54_common *priv = dev->priv;
struct p54_hdr *hdr;
struct p54_tx_data *txhdr;
size_t padding, len, tim_len = 0;
int i, j, ridx, ret;
u16 hdr_flags = 0, aid = 0;
u8 rate, queue, crypt_offset = 0;
u8 cts_rate = 0x20;
u8 rc_flags;
u8 calculated_tries[4];
u8 nrates = 0, nremaining = 8;
queue = skb_get_queue_mapping(skb);
ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid);
current_queue = &priv->tx_stats[queue];
if (unlikely((current_queue->len > current_queue->limit) && ret))
return NETDEV_TX_BUSY;
current_queue->len++;
current_queue->count++;
if ((current_queue->len == current_queue->limit) && ret)
ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
len = skb->len;
if (info->control.hw_key) {
crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
if (info->control.hw_key->alg == ALG_TKIP) {
u8 *iv = (u8 *)(skb->data + crypt_offset);
/*
* The firmware excepts that the IV has to have
* this special format
*/
iv[1] = iv[0];
iv[0] = iv[2];
iv[2] = 0;
}
}
txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
if (padding)
hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
hdr->type = cpu_to_le16(aid);
hdr->rts_tries = info->control.rates[0].count;
/*
* we register the rates in perfect order, and
* RTS/CTS won't happen on 5 GHz
*/
cts_rate = info->control.rts_cts_rate_idx;
memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
/* see how many rates got used */
for (i = 0; i < 4; i++) {
if (info->control.rates[i].idx < 0)
break;
nrates++;
}
/* limit tries to 8/nrates per rate */
for (i = 0; i < nrates; i++) {
/*
* The magic expression here is equivalent to 8/nrates for
* all values that matter, but avoids division and jumps.
* Note that nrates can only take the values 1 through 4.
*/
calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
info->control.rates[i].count);
nremaining -= calculated_tries[i];
}
/* if there are tries left, distribute from back to front */
for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
int tmp = info->control.rates[i].count - calculated_tries[i];
if (tmp <= 0)
continue;
/* RC requested more tries at this rate */
tmp = min_t(int, tmp, nremaining);
calculated_tries[i] += tmp;
nremaining -= tmp;
}
ridx = 0;
for (i = 0; i < nrates && ridx < 8; i++) {
/* we register the rates in perfect order */
rate = info->control.rates[i].idx;
if (info->band == IEEE80211_BAND_5GHZ)
rate += 4;
/* store the count we actually calculated for TX status */
info->control.rates[i].count = calculated_tries[i];
rc_flags = info->control.rates[i].flags;
if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
rate |= 0x10;
cts_rate |= 0x10;
}
if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
rate |= 0x40;
else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
rate |= 0x20;
for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
txhdr->rateset[ridx] = rate;
ridx++;
}
}
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
/* TODO: enable bursting */
hdr->flags = cpu_to_le16(hdr_flags);
hdr->tries = ridx;
txhdr->rts_rate_idx = 0;
if (info->control.hw_key) {
txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
if (info->control.hw_key->alg == ALG_TKIP) {
if (unlikely(skb_tailroom(skb) < 12))
goto err;
/* reserve space for the MIC key */
len += 8;
memcpy(skb_put(skb, 8), &(info->control.hw_key->key
[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
}
/* reserve some space for ICV */
len += info->control.hw_key->icv_len;
memset(skb_put(skb, info->control.hw_key->icv_len), 0,
info->control.hw_key->icv_len);
} else {
txhdr->key_type = 0;
txhdr->key_len = 0;
}
txhdr->crypt_offset = crypt_offset;
txhdr->hw_queue = queue;
if (current_queue)
txhdr->backlog = current_queue->len;
else
txhdr->backlog = 0;
memset(txhdr->durations, 0, sizeof(txhdr->durations));
txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
2 : info->antenna_sel_tx - 1;
txhdr->output_power = priv->output_power;
txhdr->cts_rate = cts_rate;
if (padding)
txhdr->align[0] = padding;
hdr->len = cpu_to_le16(len);
/* modifies skb->cb and with it info, so must be last! */
if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len)))
goto err;
priv->tx(dev, skb);
queue_delayed_work(dev->workqueue, &priv->work,
msecs_to_jiffies(P54_TX_FRAME_LIFETIME));
return 0;
err:
skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding);
if (current_queue) {
current_queue->len--;
current_queue->count--;
}
return NETDEV_TX_BUSY;
}
static int p54_setup_mac(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_setup_mac *setup;
u16 mode;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) +
sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP,
GFP_ATOMIC);
if (!skb)
return -ENOMEM;
setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup));
if (dev->conf.radio_enabled) {
switch (priv->mode) {
case NL80211_IFTYPE_STATION:
mode = P54_FILTER_TYPE_STATION;
break;
case NL80211_IFTYPE_AP:
mode = P54_FILTER_TYPE_AP;
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
mode = P54_FILTER_TYPE_IBSS;
break;
default:
mode = P54_FILTER_TYPE_NONE;
break;
}
if (priv->filter_flags & FIF_PROMISC_IN_BSS)
mode |= P54_FILTER_TYPE_TRANSPARENT;
} else
mode = P54_FILTER_TYPE_RX_DISABLED;
setup->mac_mode = cpu_to_le16(mode);
memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN);
memcpy(setup->bssid, priv->bssid, ETH_ALEN);
setup->rx_antenna = 2; /* automatic */
setup->rx_align = 0;
if (priv->fw_var < 0x500) {
setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
memset(setup->v1.rts_rates, 0, 8);
setup->v1.rx_addr = cpu_to_le32(priv->rx_end);
setup->v1.max_rx = cpu_to_le16(priv->rx_mtu);
setup->v1.rxhw = cpu_to_le16(priv->rxhw);
setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer);
setup->v1.unalloc0 = cpu_to_le16(0);
} else {
setup->v2.rx_addr = cpu_to_le32(priv->rx_end);
setup->v2.max_rx = cpu_to_le16(priv->rx_mtu);
setup->v2.rxhw = cpu_to_le16(priv->rxhw);
setup->v2.timer = cpu_to_le16(priv->wakeup_timer);
setup->v2.truncate = cpu_to_le16(48896);
setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
setup->v2.sbss_offset = 0;
setup->v2.mcast_window = 0;
setup->v2.rx_rssi_threshold = 0;
setup->v2.rx_ed_threshold = 0;
setup->v2.ref_clock = cpu_to_le32(644245094);
setup->v2.lpf_bandwidth = cpu_to_le16(65535);
setup->v2.osc_start_delay = cpu_to_le16(65535);
}
priv->tx(dev, skb);
return 0;
}
static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_scan *chan;
unsigned int i;
void *entry;
__le16 freq = cpu_to_le16(dev->conf.channel->center_freq);
int band = dev->conf.channel->band;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) +
sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN,
GFP_ATOMIC);
if (!skb)
return -ENOMEM;
chan = (struct p54_scan *) skb_put(skb, sizeof(*chan));
memset(chan->padding1, 0, sizeof(chan->padding1));
chan->mode = cpu_to_le16(mode);
chan->dwell = cpu_to_le16(dwell);
for (i = 0; i < priv->iq_autocal_len; i++) {
if (priv->iq_autocal[i].freq != freq)
continue;
memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
sizeof(*priv->iq_autocal));
break;
}
if (i == priv->iq_autocal_len)
goto err;
for (i = 0; i < priv->output_limit_len; i++) {
if (priv->output_limit[i].freq != freq)
continue;
chan->val_barker = 0x38;
chan->val_bpsk = chan->dup_bpsk =
priv->output_limit[i].val_bpsk;
chan->val_qpsk = chan->dup_qpsk =
priv->output_limit[i].val_qpsk;
chan->val_16qam = chan->dup_16qam =
priv->output_limit[i].val_16qam;
chan->val_64qam = chan->dup_64qam =
priv->output_limit[i].val_64qam;
break;
}
if (i == priv->output_limit_len)
goto err;
entry = priv->curve_data->data;
for (i = 0; i < priv->curve_data->channels; i++) {
if (*((__le16 *)entry) != freq) {
entry += sizeof(__le16);
entry += sizeof(struct p54_pa_curve_data_sample) *
priv->curve_data->points_per_channel;
continue;
}
entry += sizeof(__le16);
chan->pa_points_per_curve = 8;
memset(chan->curve_data, 0, sizeof(*chan->curve_data));
memcpy(chan->curve_data, entry,
sizeof(struct p54_pa_curve_data_sample) *
min((u8)8, priv->curve_data->points_per_channel));
break;
}
if (priv->fw_var < 0x500) {
chan->v1_rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
chan->v1_rssi.add = cpu_to_le16(priv->rssical_db[band].add);
} else {
chan->v2.rssi.mul = cpu_to_le16(priv->rssical_db[band].mul);
chan->v2.rssi.add = cpu_to_le16(priv->rssical_db[band].add);
chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask);
memset(chan->v2.rts_rates, 0, 8);
}
priv->tx(dev, skb);
return 0;
err:
printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
p54_free_skb(dev, skb);
return -EINVAL;
}
static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_led *led;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) +
sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED,
GFP_ATOMIC);
if (!skb)
return -ENOMEM;
led = (struct p54_led *)skb_put(skb, sizeof(*led));
led->mode = cpu_to_le16(mode);
led->led_permanent = cpu_to_le16(link);
led->led_temporary = cpu_to_le16(act);
led->duration = cpu_to_le16(1000);
priv->tx(dev, skb);
return 0;
}
#define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop) \
do { \
queue.aifs = cpu_to_le16(ai_fs); \
queue.cwmin = cpu_to_le16(cw_min); \
queue.cwmax = cpu_to_le16(cw_max); \
queue.txop = cpu_to_le16(_txop); \
} while(0)
static int p54_set_edcf(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_edcf *edcf;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) +
sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT,
GFP_ATOMIC);
if (!skb)
return -ENOMEM;
edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf));
if (priv->use_short_slot) {
edcf->slottime = 9;
edcf->sifs = 0x10;
edcf->eofpad = 0x00;
} else {
edcf->slottime = 20;
edcf->sifs = 0x0a;
edcf->eofpad = 0x06;
}
/* (see prism54/isl_oid.h for further details) */
edcf->frameburst = cpu_to_le16(0);
edcf->round_trip_delay = cpu_to_le16(0);
edcf->flags = 0;
memset(edcf->mapping, 0, sizeof(edcf->mapping));
memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue));
priv->tx(dev, skb);
return 0;
}
static int p54_beacon_tim(struct sk_buff *skb)
{
/*
* the good excuse for this mess is ... the firmware.
* The dummy TIM MUST be at the end of the beacon frame,
* because it'll be overwritten!
*/
struct ieee80211_mgmt *mgmt = (void *)skb->data;
u8 *pos, *end;
if (skb->len <= sizeof(mgmt))
return -EINVAL;
pos = (u8 *)mgmt->u.beacon.variable;
end = skb->data + skb->len;
while (pos < end) {
if (pos + 2 + pos[1] > end)
return -EINVAL;
if (pos[0] == WLAN_EID_TIM) {
u8 dtim_len = pos[1];
u8 dtim_period = pos[3];
u8 *next = pos + 2 + dtim_len;
if (dtim_len < 3)
return -EINVAL;
memmove(pos, next, end - next);
if (dtim_len > 3)
skb_trim(skb, skb->len - (dtim_len - 3));
pos = end - (dtim_len + 2);
/* add the dummy at the end */
pos[0] = WLAN_EID_TIM;
pos[1] = 3;
pos[2] = 0;
pos[3] = dtim_period;
pos[4] = 0;
return 0;
}
pos += 2 + pos[1];
}
return 0;
}
static int p54_beacon_update(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
struct p54_common *priv = dev->priv;
struct sk_buff *beacon;
int ret;
if (priv->cached_beacon) {
p54_tx_cancel(dev, priv->cached_beacon);
/* wait for the last beacon the be freed */
msleep(10);
}
beacon = ieee80211_beacon_get(dev, vif);
if (!beacon)
return -ENOMEM;
ret = p54_beacon_tim(beacon);
if (ret)
return ret;
ret = p54_tx(dev, beacon);
if (ret)
return ret;
priv->cached_beacon = beacon;
priv->tsf_high32 = 0;
priv->tsf_low32 = 0;
return 0;
}
static int p54_start(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
int err;
mutex_lock(&priv->conf_mutex);
err = priv->open(dev);
if (err)
goto out;
P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
err = p54_set_edcf(dev);
if (err)
goto out;
memset(priv->bssid, ~0, ETH_ALEN);
priv->mode = NL80211_IFTYPE_MONITOR;
err = p54_setup_mac(dev);
if (err) {
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
goto out;
}
queue_delayed_work(dev->workqueue, &priv->work, 0);
out:
mutex_unlock(&priv->conf_mutex);
return err;
}
static void p54_stop(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
mutex_lock(&priv->conf_mutex);
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
cancel_delayed_work_sync(&priv->work);
if (priv->cached_beacon)
p54_tx_cancel(dev, priv->cached_beacon);
priv->stop(dev);
while ((skb = skb_dequeue(&priv->tx_queue)))
kfree_skb(skb);
priv->cached_beacon = NULL;
priv->tsf_high32 = priv->tsf_low32 = 0;
mutex_unlock(&priv->conf_mutex);
}
static int p54_add_interface(struct ieee80211_hw *dev,
struct ieee80211_if_init_conf *conf)
{
struct p54_common *priv = dev->priv;
mutex_lock(&priv->conf_mutex);
if (priv->mode != NL80211_IFTYPE_MONITOR) {
mutex_unlock(&priv->conf_mutex);
return -EOPNOTSUPP;
}
switch (conf->type) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
priv->mode = conf->type;
break;
default:
mutex_unlock(&priv->conf_mutex);
return -EOPNOTSUPP;
}
memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
p54_setup_mac(dev);
p54_set_leds(dev, 1, 0, 0);
mutex_unlock(&priv->conf_mutex);
return 0;
}
static void p54_remove_interface(struct ieee80211_hw *dev,
struct ieee80211_if_init_conf *conf)
{
struct p54_common *priv = dev->priv;
mutex_lock(&priv->conf_mutex);
if (priv->cached_beacon)
p54_tx_cancel(dev, priv->cached_beacon);
priv->mode = NL80211_IFTYPE_MONITOR;
memset(priv->mac_addr, 0, ETH_ALEN);
memset(priv->bssid, 0, ETH_ALEN);
p54_setup_mac(dev);
mutex_unlock(&priv->conf_mutex);
}
static int p54_config(struct ieee80211_hw *dev, u32 changed)
{
int ret = 0;
struct p54_common *priv = dev->priv;
struct ieee80211_conf *conf = &dev->conf;
mutex_lock(&priv->conf_mutex);
if (changed & IEEE80211_CONF_CHANGE_POWER)
priv->output_power = conf->power_level << 2;
if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
ret = p54_setup_mac(dev);
if (ret)
goto out;
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
ret = p54_scan(dev, P54_SCAN_EXIT, 0);
if (ret)
goto out;
}
out:
mutex_unlock(&priv->conf_mutex);
return ret;
}
static int p54_config_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
struct ieee80211_if_conf *conf)
{
struct p54_common *priv = dev->priv;
int ret = 0;
mutex_lock(&priv->conf_mutex);
if (conf->changed & IEEE80211_IFCC_BSSID) {
memcpy(priv->bssid, conf->bssid, ETH_ALEN);
ret = p54_setup_mac(dev);
if (ret)
goto out;
}
if (conf->changed & IEEE80211_IFCC_BEACON) {
ret = p54_scan(dev, P54_SCAN_EXIT, 0);
if (ret)
goto out;
ret = p54_setup_mac(dev);
if (ret)
goto out;
ret = p54_beacon_update(dev, vif);
if (ret)
goto out;
ret = p54_set_edcf(dev);
if (ret)
goto out;
}
ret = p54_set_leds(dev, 1, !is_multicast_ether_addr(priv->bssid), 0);
out:
mutex_unlock(&priv->conf_mutex);
return ret;
}
static void p54_configure_filter(struct ieee80211_hw *dev,
unsigned int changed_flags,
unsigned int *total_flags,
int mc_count, struct dev_mc_list *mclist)
{
struct p54_common *priv = dev->priv;
*total_flags &= FIF_PROMISC_IN_BSS |
(*total_flags & FIF_PROMISC_IN_BSS) ?
FIF_FCSFAIL : 0;
priv->filter_flags = *total_flags;
if (changed_flags & FIF_PROMISC_IN_BSS)
p54_setup_mac(dev);
}
static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct p54_common *priv = dev->priv;
int ret;
mutex_lock(&priv->conf_mutex);
if ((params) && !(queue > 4)) {
P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
params->cw_min, params->cw_max, params->txop);
ret = p54_set_edcf(dev);
} else
ret = -EINVAL;
mutex_unlock(&priv->conf_mutex);
return ret;
}
static int p54_init_xbow_synth(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_xbow_synth *xbow;
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) +
sizeof(struct p54_hdr),
P54_CONTROL_TYPE_XBOW_SYNTH_CFG,
GFP_KERNEL);
if (!skb)
return -ENOMEM;
xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow));
xbow->magic1 = cpu_to_le16(0x1);
xbow->magic2 = cpu_to_le16(0x2);
xbow->freq = cpu_to_le16(5390);
memset(xbow->padding, 0, sizeof(xbow->padding));
priv->tx(dev, skb);
return 0;
}
static void p54_work(struct work_struct *work)
{
struct p54_common *priv = container_of(work, struct p54_common,
work.work);
struct ieee80211_hw *dev = priv->hw;
struct sk_buff *skb;
if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
return ;
/*
* TODO: walk through tx_queue and do the following tasks
* 1. initiate bursts.
* 2. cancel stuck frames / reset the device if necessary.
*/
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) +
sizeof(struct p54_statistics),
P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL);
if (!skb)
return ;
priv->tx(dev, skb);
}
static int p54_get_stats(struct ieee80211_hw *dev,
struct ieee80211_low_level_stats *stats)
{
struct p54_common *priv = dev->priv;
memcpy(stats, &priv->stats, sizeof(*stats));
return 0;
}
static int p54_get_tx_stats(struct ieee80211_hw *dev,
struct ieee80211_tx_queue_stats *stats)
{
struct p54_common *priv = dev->priv;
memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
return 0;
}
static void p54_bss_info_changed(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct p54_common *priv = dev->priv;
if (changed & BSS_CHANGED_ERP_SLOT) {
priv->use_short_slot = info->use_short_slot;
p54_set_edcf(dev);
}
if (changed & BSS_CHANGED_BASIC_RATES) {
if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
priv->basic_rate_mask = (info->basic_rates << 4);
else
priv->basic_rate_mask = info->basic_rates;
p54_setup_mac(dev);
if (priv->fw_var >= 0x500)
p54_scan(dev, P54_SCAN_EXIT, 0);
}
if (changed & BSS_CHANGED_ASSOC) {
if (info->assoc) {
priv->aid = info->aid;
priv->wakeup_timer = info->beacon_int *
info->dtim_period * 5;
p54_setup_mac(dev);
}
}
}
static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
const u8 *local_address, const u8 *address,
struct ieee80211_key_conf *key)
{
struct p54_common *priv = dev->priv;
struct sk_buff *skb;
struct p54_keycache *rxkey;
u8 algo = 0;
if (modparam_nohwcrypt)
return -EOPNOTSUPP;
if (cmd == DISABLE_KEY)
algo = 0;
else {
switch (key->alg) {
case ALG_TKIP:
if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
BR_DESC_PRIV_CAP_TKIP)))
return -EOPNOTSUPP;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
algo = P54_CRYPTO_TKIPMICHAEL;
break;
case ALG_WEP:
if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP))
return -EOPNOTSUPP;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
algo = P54_CRYPTO_WEP;
break;
case ALG_CCMP:
if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP))
return -EOPNOTSUPP;
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
algo = P54_CRYPTO_AESCCMP;
break;
default:
return -EOPNOTSUPP;
}
}
if (key->keyidx > priv->rx_keycache_size) {
/*
* The device supports the choosen algorithm, but the firmware
* does not provide enough key slots to store all of them.
* So, incoming frames have to be decoded by the mac80211 stack,
* but we can still offload encryption for outgoing frames.
*/
return 0;
}
mutex_lock(&priv->conf_mutex);
skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) +
sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE,
GFP_ATOMIC);
if (!skb) {
mutex_unlock(&priv->conf_mutex);
return -ENOMEM;
}
/* TODO: some devices have 4 more free slots for rx keys */
rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey));
rxkey->entry = key->keyidx;
rxkey->key_id = key->keyidx;
rxkey->key_type = algo;
if (address)
memcpy(rxkey->mac, address, ETH_ALEN);
else
memset(rxkey->mac, ~0, ETH_ALEN);
if (key->alg != ALG_TKIP) {
rxkey->key_len = min((u8)16, key->keylen);
memcpy(rxkey->key, key->key, rxkey->key_len);
} else {
rxkey->key_len = 24;
memcpy(rxkey->key, key->key, 16);
memcpy(&(rxkey->key[16]), &(key->key
[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8);
}
priv->tx(dev, skb);
mutex_unlock(&priv->conf_mutex);
return 0;
}
static const struct ieee80211_ops p54_ops = {
.tx = p54_tx,
.start = p54_start,
.stop = p54_stop,
.add_interface = p54_add_interface,
.remove_interface = p54_remove_interface,
.set_tim = p54_set_tim,
.sta_notify = p54_sta_notify,
.set_key = p54_set_key,
.config = p54_config,
.config_interface = p54_config_interface,
.bss_info_changed = p54_bss_info_changed,
.configure_filter = p54_configure_filter,
.conf_tx = p54_conf_tx,
.get_stats = p54_get_stats,
.get_tx_stats = p54_get_tx_stats
};
struct ieee80211_hw *p54_init_common(size_t priv_data_len)
{
struct ieee80211_hw *dev;
struct p54_common *priv;
dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
if (!dev)
return NULL;
priv = dev->priv;
priv->hw = dev;
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
priv->basic_rate_mask = 0x15f;
skb_queue_head_init(&priv->tx_queue);
dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM;
dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC) |
BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_MESH_POINT);
dev->channel_change_time = 1000; /* TODO: find actual value */
priv->tx_stats[0].limit = 1; /* Beacon queue */
priv->tx_stats[1].limit = 1; /* Probe queue for HW scan */
priv->tx_stats[2].limit = 3; /* queue for MLMEs */
priv->tx_stats[3].limit = 3; /* Broadcast / MC queue */
priv->tx_stats[4].limit = 5; /* Data */
dev->queues = 1;
priv->noise = -94;
/*
* We support at most 8 tries no matter which rate they're at,
* we cannot support max_rates * max_rate_tries as we set it
* here, but setting it correctly to 4/2 or so would limit us
* artificially if the RC algorithm wants just two rates, so
* let's say 4/7, we'll redistribute it at TX time, see the
* comments there.
*/
dev->max_rates = 4;
dev->max_rate_tries = 7;
dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
sizeof(struct p54_tx_data);
mutex_init(&priv->conf_mutex);
init_completion(&priv->eeprom_comp);
INIT_DELAYED_WORK(&priv->work, p54_work);
return dev;
}
EXPORT_SYMBOL_GPL(p54_init_common);
void p54_free_common(struct ieee80211_hw *dev)
{
struct p54_common *priv = dev->priv;
kfree(priv->iq_autocal);
kfree(priv->output_limit);
kfree(priv->curve_data);
}
EXPORT_SYMBOL_GPL(p54_free_common);
static int __init p54_init(void)
{
return 0;
}
static void __exit p54_exit(void)
{
}
module_init(p54_init);
module_exit(p54_exit);
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