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17744ff6ae
linux/drivers/net/wireless/iwlwifi/iwl-4965.c
Tomas Winkler 17744ff6ae iwlwifi: Fix 52 rate report in rx status 
This patch fixes reporting rate in RX packets in 52 band.
The rate was updated from CCK rate index instead of OFDM rate 6M
Most of the patch is collateral clean up

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-06 17:09:46 -05:00

4835 lines
137 KiB
C
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/******************************************************************************
*
* Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License 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 Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* James P. Ketrenos <ipw2100-admin@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>
#include "iwl-4965.h"
#include "iwl-helpers.h"
static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
IWL_RATE_SISO_##s##M_PLCP, \
IWL_RATE_MIMO_##s##M_PLCP, \
IWL_RATE_##r##M_IEEE, \
IWL_RATE_##ip##M_INDEX, \
IWL_RATE_##in##M_INDEX, \
IWL_RATE_##rp##M_INDEX, \
IWL_RATE_##rn##M_INDEX, \
IWL_RATE_##pp##M_INDEX, \
IWL_RATE_##np##M_INDEX }
/*
* Parameter order:
* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
*
* If there isn't a valid next or previous rate then INV is used which
* maps to IWL_RATE_INVALID
*
*/
const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
};
#ifdef CONFIG_IWL4965_HT
static const u16 default_tid_to_tx_fifo[] = {
IWL_TX_FIFO_AC1,
IWL_TX_FIFO_AC0,
IWL_TX_FIFO_AC0,
IWL_TX_FIFO_AC1,
IWL_TX_FIFO_AC2,
IWL_TX_FIFO_AC2,
IWL_TX_FIFO_AC3,
IWL_TX_FIFO_AC3,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_NONE,
IWL_TX_FIFO_AC3
};
#endif /*CONFIG_IWL4965_HT */
static int is_fat_channel(__le32 rxon_flags)
{
return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
(rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
}
static u8 is_single_stream(struct iwl4965_priv *priv)
{
#ifdef CONFIG_IWL4965_HT
if (!priv->current_ht_config.is_ht ||
(priv->current_ht_config.supp_mcs_set[1] == 0) ||
(priv->ps_mode == IWL_MIMO_PS_STATIC))
return 1;
#else
return 1;
#endif /*CONFIG_IWL4965_HT */
return 0;
}
int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
{
int idx = 0;
/* 4965 HT rate format */
if (rate_n_flags & RATE_MCS_HT_MSK) {
idx = (rate_n_flags & 0xff);
if (idx >= IWL_RATE_MIMO_6M_PLCP)
idx = idx - IWL_RATE_MIMO_6M_PLCP;
idx += IWL_FIRST_OFDM_RATE;
/* skip 9M not supported in ht*/
if (idx >= IWL_RATE_9M_INDEX)
idx += 1;
if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
return idx;
/* 4965 legacy rate format, search for match in table */
} else {
for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
return idx;
}
return -1;
}
/*
* Determine how many receiver/antenna chains to use.
* More provides better reception via diversity. Fewer saves power.
* MIMO (dual stream) requires at least 2, but works better with 3.
* This does not determine *which* chains to use, just how many.
*/
static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
u8 *idle_state, u8 *rx_state)
{
u8 is_single = is_single_stream(priv);
u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
/* # of Rx chains to use when expecting MIMO. */
if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
*rx_state = 2;
else
*rx_state = 3;
/* # Rx chains when idling and maybe trying to save power */
switch (priv->ps_mode) {
case IWL_MIMO_PS_STATIC:
case IWL_MIMO_PS_DYNAMIC:
*idle_state = (is_cam) ? 2 : 1;
break;
case IWL_MIMO_PS_NONE:
*idle_state = (is_cam) ? *rx_state : 1;
break;
default:
*idle_state = 1;
break;
}
return 0;
}
int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
{
int rc;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* stop Rx DMA */
iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
(1 << 24), 1000);
if (rc < 0)
IWL_ERROR("Can't stop Rx DMA.\n");
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
{
int i;
int start = 0;
int ret = IWL_INVALID_STATION;
unsigned long flags;
DECLARE_MAC_BUF(mac);
if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
(priv->iw_mode == IEEE80211_IF_TYPE_AP))
start = IWL_STA_ID;
if (is_broadcast_ether_addr(addr))
return IWL4965_BROADCAST_ID;
spin_lock_irqsave(&priv->sta_lock, flags);
for (i = start; i < priv->hw_setting.max_stations; i++)
if ((priv->stations[i].used) &&
(!compare_ether_addr
(priv->stations[i].sta.sta.addr, addr))) {
ret = i;
goto out;
}
IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
print_mac(mac, addr), priv->num_stations);
out:
spin_unlock_irqrestore(&priv->sta_lock, flags);
return ret;
}
static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
ret = iwl4965_grab_nic_access(priv);
if (ret) {
spin_unlock_irqrestore(&priv->lock, flags);
return ret;
}
if (!pwr_max) {
u32 val;
ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
&val);
if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
~APMG_PS_CTRL_MSK_PWR_SRC);
} else
iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
~APMG_PS_CTRL_MSK_PWR_SRC);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return ret;
}
static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
{
int rc;
unsigned long flags;
unsigned int rb_size;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
if (iwl4965_param_amsdu_size_8K)
rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
else
rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
/* Stop Rx DMA */
iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
/* Reset driver's Rx queue write index */
iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
/* Tell device where to find RBD circular buffer in DRAM */
iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
rxq->dma_addr >> 8);
/* Tell device where in DRAM to update its Rx status */
iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
(priv->hw_setting.shared_phys +
offsetof(struct iwl4965_shared, val0)) >> 4);
/* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
rb_size |
/*0x10 << 4 | */
(RX_QUEUE_SIZE_LOG <<
FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
/*
* iwl4965_write32(priv,CSR_INT_COAL_REG,0);
*/
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
/* Tell 4965 where to find the "keep warm" buffer */
static int iwl4965_kw_init(struct iwl4965_priv *priv)
{
unsigned long flags;
int rc;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc)
goto out;
iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
priv->kw.dma_addr >> 4);
iwl4965_release_nic_access(priv);
out:
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
{
struct pci_dev *dev = priv->pci_dev;
struct iwl4965_kw *kw = &priv->kw;
kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
if (!kw->v_addr)
return -ENOMEM;
return 0;
}
#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
? # x " " : "")
/**
* iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
*
* Does not set up a command, or touch hardware.
*/
int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv,
enum ieee80211_band band, u16 channel,
const struct iwl4965_eeprom_channel *eeprom_ch,
u8 fat_extension_channel)
{
struct iwl4965_channel_info *ch_info;
ch_info = (struct iwl4965_channel_info *)
iwl4965_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info))
return -1;
IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
" %ddBm): Ad-Hoc %ssupported\n",
ch_info->channel,
is_channel_a_band(ch_info) ?
"5.2" : "2.4",
CHECK_AND_PRINT(IBSS),
CHECK_AND_PRINT(ACTIVE),
CHECK_AND_PRINT(RADAR),
CHECK_AND_PRINT(WIDE),
CHECK_AND_PRINT(NARROW),
CHECK_AND_PRINT(DFS),
eeprom_ch->flags,
eeprom_ch->max_power_avg,
((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
&& !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
"" : "not ");
ch_info->fat_eeprom = *eeprom_ch;
ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
ch_info->fat_min_power = 0;
ch_info->fat_scan_power = eeprom_ch->max_power_avg;
ch_info->fat_flags = eeprom_ch->flags;
ch_info->fat_extension_channel = fat_extension_channel;
return 0;
}
/**
* iwl4965_kw_free - Free the "keep warm" buffer
*/
static void iwl4965_kw_free(struct iwl4965_priv *priv)
{
struct pci_dev *dev = priv->pci_dev;
struct iwl4965_kw *kw = &priv->kw;
if (kw->v_addr) {
pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
memset(kw, 0, sizeof(*kw));
}
}
/**
* iwl4965_txq_ctx_reset - Reset TX queue context
* Destroys all DMA structures and initialise them again
*
* @param priv
* @return error code
*/
static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
{
int rc = 0;
int txq_id, slots_num;
unsigned long flags;
iwl4965_kw_free(priv);
/* Free all tx/cmd queues and keep-warm buffer */
iwl4965_hw_txq_ctx_free(priv);
/* Alloc keep-warm buffer */
rc = iwl4965_kw_alloc(priv);
if (rc) {
IWL_ERROR("Keep Warm allocation failed");
goto error_kw;
}
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (unlikely(rc)) {
IWL_ERROR("TX reset failed");
spin_unlock_irqrestore(&priv->lock, flags);
goto error_reset;
}
/* Turn off all Tx DMA channels */
iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
/* Tell 4965 where to find the keep-warm buffer */
rc = iwl4965_kw_init(priv);
if (rc) {
IWL_ERROR("kw_init failed\n");
goto error_reset;
}
/* Alloc and init all (default 16) Tx queues,
* including the command queue (#4) */
for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
txq_id);
if (rc) {
IWL_ERROR("Tx %d queue init failed\n", txq_id);
goto error;
}
}
return rc;
error:
iwl4965_hw_txq_ctx_free(priv);
error_reset:
iwl4965_kw_free(priv);
error_kw:
return rc;
}
int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
{
int rc;
unsigned long flags;
struct iwl4965_rx_queue *rxq = &priv->rxq;
u8 rev_id;
u32 val;
u8 val_link;
iwl4965_power_init_handle(priv);
/* nic_init */
spin_lock_irqsave(&priv->lock, flags);
iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
if (rc < 0) {
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_INFO("Failed to init the card\n");
return rc;
}
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
APMG_CLK_VAL_DMA_CLK_RQT |
APMG_CLK_VAL_BSM_CLK_RQT);
iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
udelay(20);
iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
iwl4965_release_nic_access(priv);
iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
spin_unlock_irqrestore(&priv->lock, flags);
/* Determine HW type */
rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
if (rc)
return rc;
IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
iwl4965_nic_set_pwr_src(priv, 1);
spin_lock_irqsave(&priv->lock, flags);
if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
/* Enable No Snoop field */
pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
val & ~(1 << 11));
}
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
IWL_ERROR("Older EEPROM detected! Aborting.\n");
return -EINVAL;
}
pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
/* disable L1 entry -- workaround for pre-B1 */
pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
spin_lock_irqsave(&priv->lock, flags);
/* set CSR_HW_CONFIG_REG for uCode use */
iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
rc = iwl4965_grab_nic_access(priv);
if (rc < 0) {
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_INFO("Failed to init the card\n");
return rc;
}
iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_RESET_REQ);
udelay(5);
iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_RESET_REQ);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
iwl4965_hw_card_show_info(priv);
/* end nic_init */
/* Allocate the RX queue, or reset if it is already allocated */
if (!rxq->bd) {
rc = iwl4965_rx_queue_alloc(priv);
if (rc) {
IWL_ERROR("Unable to initialize Rx queue\n");
return -ENOMEM;
}
} else
iwl4965_rx_queue_reset(priv, rxq);
iwl4965_rx_replenish(priv);
iwl4965_rx_init(priv, rxq);
spin_lock_irqsave(&priv->lock, flags);
rxq->need_update = 1;
iwl4965_rx_queue_update_write_ptr(priv, rxq);
spin_unlock_irqrestore(&priv->lock, flags);
/* Allocate and init all Tx and Command queues */
rc = iwl4965_txq_ctx_reset(priv);
if (rc)
return rc;
if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
set_bit(STATUS_INIT, &priv->status);
return 0;
}
int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
{
int rc = 0;
u32 reg_val;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
/* set stop master bit */
iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
(reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
IWL_DEBUG_INFO("Card in power save, master is already "
"stopped\n");
else {
rc = iwl4965_poll_bit(priv, CSR_RESET,
CSR_RESET_REG_FLAG_MASTER_DISABLED,
CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
if (rc < 0) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
}
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_INFO("stop master\n");
return rc;
}
/**
* iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
*/
void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
{
int txq_id;
unsigned long flags;
/* Stop each Tx DMA channel, and wait for it to be idle */
for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
spin_lock_irqsave(&priv->lock, flags);
if (iwl4965_grab_nic_access(priv)) {
spin_unlock_irqrestore(&priv->lock, flags);
continue;
}
iwl4965_write_direct32(priv,
IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
0x0);
iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
(txq_id), 200);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
}
/* Deallocate memory for all Tx queues */
iwl4965_hw_txq_ctx_free(priv);
}
int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
{
int rc = 0;
unsigned long flags;
iwl4965_hw_nic_stop_master(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
rc = iwl4965_poll_bit(priv, CSR_RESET,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
udelay(10);
rc = iwl4965_grab_nic_access(priv);
if (!rc) {
iwl4965_write_prph(priv, APMG_CLK_EN_REG,
APMG_CLK_VAL_DMA_CLK_RQT |
APMG_CLK_VAL_BSM_CLK_RQT);
udelay(10);
iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
iwl4965_release_nic_access(priv);
}
clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
wake_up_interruptible(&priv->wait_command_queue);
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
#define REG_RECALIB_PERIOD (60)
/**
* iwl4965_bg_statistics_periodic - Timer callback to queue statistics
*
* This callback is provided in order to queue the statistics_work
* in work_queue context (v. softirq)
*
* This timer function is continually reset to execute within
* REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
* was received. We need to ensure we receive the statistics in order
* to update the temperature used for calibrating the TXPOWER. However,
* we can't send the statistics command from softirq context (which
* is the context which timers run at) so we have to queue off the
* statistics_work to actually send the command to the hardware.
*/
static void iwl4965_bg_statistics_periodic(unsigned long data)
{
struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
queue_work(priv->workqueue, &priv->statistics_work);
}
/**
* iwl4965_bg_statistics_work - Send the statistics request to the hardware.
*
* This is queued by iwl4965_bg_statistics_periodic.
*/
static void iwl4965_bg_statistics_work(struct work_struct *work)
{
struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
statistics_work);
if (test_bit(STATUS_EXIT_PENDING, &priv->status))
return;
mutex_lock(&priv->mutex);
iwl4965_send_statistics_request(priv);
mutex_unlock(&priv->mutex);
}
#define CT_LIMIT_CONST 259
#define TM_CT_KILL_THRESHOLD 110
void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
{
struct iwl4965_ct_kill_config cmd;
u32 R1, R2, R3;
u32 temp_th;
u32 crit_temperature;
unsigned long flags;
int rc = 0;
spin_lock_irqsave(&priv->lock, flags);
iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
} else {
R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
}
temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
rc = iwl4965_send_cmd_pdu(priv,
REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
if (rc)
IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
else
IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
}
#ifdef CONFIG_IWL4965_SENSITIVITY
/* "false alarms" are signals that our DSP tries to lock onto,
* but then determines that they are either noise, or transmissions
* from a distant wireless network (also "noise", really) that get
* "stepped on" by stronger transmissions within our own network.
* This algorithm attempts to set a sensitivity level that is high
* enough to receive all of our own network traffic, but not so
* high that our DSP gets too busy trying to lock onto non-network
* activity/noise. */
static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
u32 norm_fa,
u32 rx_enable_time,
struct statistics_general_data *rx_info)
{
u32 max_nrg_cck = 0;
int i = 0;
u8 max_silence_rssi = 0;
u32 silence_ref = 0;
u8 silence_rssi_a = 0;
u8 silence_rssi_b = 0;
u8 silence_rssi_c = 0;
u32 val;
/* "false_alarms" values below are cross-multiplications to assess the
* numbers of false alarms within the measured period of actual Rx
* (Rx is off when we're txing), vs the min/max expected false alarms
* (some should be expected if rx is sensitive enough) in a
* hypothetical listening period of 200 time units (TU), 204.8 msec:
*
* MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
*
* */
u32 false_alarms = norm_fa * 200 * 1024;
u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
struct iwl4965_sensitivity_data *data = NULL;
data = &(priv->sensitivity_data);
data->nrg_auto_corr_silence_diff = 0;
/* Find max silence rssi among all 3 receivers.
* This is background noise, which may include transmissions from other
* networks, measured during silence before our network's beacon */
silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
ALL_BAND_FILTER) >> 8);
silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
ALL_BAND_FILTER) >> 8);
silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
ALL_BAND_FILTER) >> 8);
val = max(silence_rssi_b, silence_rssi_c);
max_silence_rssi = max(silence_rssi_a, (u8) val);
/* Store silence rssi in 20-beacon history table */
data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
data->nrg_silence_idx++;
if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
data->nrg_silence_idx = 0;
/* Find max silence rssi across 20 beacon history */
for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
val = data->nrg_silence_rssi[i];
silence_ref = max(silence_ref, val);
}
IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
silence_rssi_a, silence_rssi_b, silence_rssi_c,
silence_ref);
/* Find max rx energy (min value!) among all 3 receivers,
* measured during beacon frame.
* Save it in 10-beacon history table. */
i = data->nrg_energy_idx;
val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
data->nrg_energy_idx++;
if (data->nrg_energy_idx >= 10)
data->nrg_energy_idx = 0;
/* Find min rx energy (max value) across 10 beacon history.
* This is the minimum signal level that we want to receive well.
* Add backoff (margin so we don't miss slightly lower energy frames).
* This establishes an upper bound (min value) for energy threshold. */
max_nrg_cck = data->nrg_value[0];
for (i = 1; i < 10; i++)
max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
max_nrg_cck += 6;
IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
rx_info->beacon_energy_a, rx_info->beacon_energy_b,
rx_info->beacon_energy_c, max_nrg_cck - 6);
/* Count number of consecutive beacons with fewer-than-desired
* false alarms. */
if (false_alarms < min_false_alarms)
data->num_in_cck_no_fa++;
else
data->num_in_cck_no_fa = 0;
IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
data->num_in_cck_no_fa);
/* If we got too many false alarms this time, reduce sensitivity */
if (false_alarms > max_false_alarms) {
IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
false_alarms, max_false_alarms);
IWL_DEBUG_CALIB("... reducing sensitivity\n");
data->nrg_curr_state = IWL_FA_TOO_MANY;
if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
/* Store for "fewer than desired" on later beacon */
data->nrg_silence_ref = silence_ref;
/* increase energy threshold (reduce nrg value)
* to decrease sensitivity */
if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
data->nrg_th_cck = data->nrg_th_cck
- NRG_STEP_CCK;
}
/* increase auto_corr values to decrease sensitivity */
if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
else {
val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
}
val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
/* Else if we got fewer than desired, increase sensitivity */
} else if (false_alarms < min_false_alarms) {
data->nrg_curr_state = IWL_FA_TOO_FEW;
/* Compare silence level with silence level for most recent
* healthy number or too many false alarms */
data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
(s32)silence_ref;
IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
false_alarms, min_false_alarms,
data->nrg_auto_corr_silence_diff);
/* Increase value to increase sensitivity, but only if:
* 1a) previous beacon did *not* have *too many* false alarms
* 1b) AND there's a significant difference in Rx levels
* from a previous beacon with too many, or healthy # FAs
* OR 2) We've seen a lot of beacons (100) with too few
* false alarms */
if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
(data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
IWL_DEBUG_CALIB("... increasing sensitivity\n");
/* Increase nrg value to increase sensitivity */
val = data->nrg_th_cck + NRG_STEP_CCK;
data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
/* Decrease auto_corr values to increase sensitivity */
val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
data->auto_corr_cck_mrc =
max((u32)AUTO_CORR_MIN_CCK_MRC, val);
} else
IWL_DEBUG_CALIB("... but not changing sensitivity\n");
/* Else we got a healthy number of false alarms, keep status quo */
} else {
IWL_DEBUG_CALIB(" FA in safe zone\n");
data->nrg_curr_state = IWL_FA_GOOD_RANGE;
/* Store for use in "fewer than desired" with later beacon */
data->nrg_silence_ref = silence_ref;
/* If previous beacon had too many false alarms,
* give it some extra margin by reducing sensitivity again
* (but don't go below measured energy of desired Rx) */
if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
IWL_DEBUG_CALIB("... increasing margin\n");
data->nrg_th_cck -= NRG_MARGIN;
}
}
/* Make sure the energy threshold does not go above the measured
* energy of the desired Rx signals (reduced by backoff margin),
* or else we might start missing Rx frames.
* Lower value is higher energy, so we use max()!
*/
data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
data->nrg_prev_state = data->nrg_curr_state;
return 0;
}
static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
u32 norm_fa,
u32 rx_enable_time)
{
u32 val;
u32 false_alarms = norm_fa * 200 * 1024;
u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
struct iwl4965_sensitivity_data *data = NULL;
data = &(priv->sensitivity_data);
/* If we got too many false alarms this time, reduce sensitivity */
if (false_alarms > max_false_alarms) {
IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
false_alarms, max_false_alarms);
val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm =
min((u32)AUTO_CORR_MAX_OFDM, val);
val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_mrc =
min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_x1 =
min((u32)AUTO_CORR_MAX_OFDM_X1, val);
val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_mrc_x1 =
min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
}
/* Else if we got fewer than desired, increase sensitivity */
else if (false_alarms < min_false_alarms) {
IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
false_alarms, min_false_alarms);
val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm =
max((u32)AUTO_CORR_MIN_OFDM, val);
val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_mrc =
max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_x1 =
max((u32)AUTO_CORR_MIN_OFDM_X1, val);
val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
data->auto_corr_ofdm_mrc_x1 =
max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
}
else
IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
min_false_alarms, false_alarms, max_false_alarms);
return 0;
}
static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
struct iwl4965_cmd *cmd, struct sk_buff *skb)
{
/* We didn't cache the SKB; let the caller free it */
return 1;
}
/* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
{
int rc = 0;
struct iwl4965_sensitivity_cmd cmd ;
struct iwl4965_sensitivity_data *data = NULL;
struct iwl4965_host_cmd cmd_out = {
.id = SENSITIVITY_CMD,
.len = sizeof(struct iwl4965_sensitivity_cmd),
.meta.flags = flags,
.data = &cmd,
};
data = &(priv->sensitivity_data);
memset(&cmd, 0, sizeof(cmd));
cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
cpu_to_le16((u16)data->auto_corr_ofdm);
cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
cpu_to_le16((u16)data->auto_corr_ofdm_x1);
cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
cpu_to_le16((u16)data->auto_corr_cck);
cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
cpu_to_le16((u16)data->auto_corr_cck_mrc);
cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
cpu_to_le16((u16)data->nrg_th_cck);
cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
cpu_to_le16((u16)data->nrg_th_ofdm);
cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
__constant_cpu_to_le16(190);
cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
__constant_cpu_to_le16(390);
cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
__constant_cpu_to_le16(62);
IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
data->nrg_th_ofdm);
IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
data->auto_corr_cck, data->auto_corr_cck_mrc,
data->nrg_th_cck);
/* Update uCode's "work" table, and copy it to DSP */
cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
if (flags & CMD_ASYNC)
cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
/* Don't send command to uCode if nothing has changed */
if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
sizeof(u16)*HD_TABLE_SIZE)) {
IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
return 0;
}
/* Copy table for comparison next time */
memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
sizeof(u16)*HD_TABLE_SIZE);
rc = iwl4965_send_cmd(priv, &cmd_out);
if (!rc) {
IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
return rc;
}
return 0;
}
void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
{
int rc = 0;
int i;
struct iwl4965_sensitivity_data *data = NULL;
IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
if (force)
memset(&(priv->sensitivity_tbl[0]), 0,
sizeof(u16)*HD_TABLE_SIZE);
/* Clear driver's sensitivity algo data */
data = &(priv->sensitivity_data);
memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
data->num_in_cck_no_fa = 0;
data->nrg_curr_state = IWL_FA_TOO_MANY;
data->nrg_prev_state = IWL_FA_TOO_MANY;
data->nrg_silence_ref = 0;
data->nrg_silence_idx = 0;
data->nrg_energy_idx = 0;
for (i = 0; i < 10; i++)
data->nrg_value[i] = 0;
for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
data->nrg_silence_rssi[i] = 0;
data->auto_corr_ofdm = 90;
data->auto_corr_ofdm_mrc = 170;
data->auto_corr_ofdm_x1 = 105;
data->auto_corr_ofdm_mrc_x1 = 220;
data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
data->auto_corr_cck_mrc = 200;
data->nrg_th_cck = 100;
data->nrg_th_ofdm = 100;
data->last_bad_plcp_cnt_ofdm = 0;
data->last_fa_cnt_ofdm = 0;
data->last_bad_plcp_cnt_cck = 0;
data->last_fa_cnt_cck = 0;
/* Clear prior Sensitivity command data to force send to uCode */
if (force)
memset(&(priv->sensitivity_tbl[0]), 0,
sizeof(u16)*HD_TABLE_SIZE);
rc |= iwl4965_sensitivity_write(priv, flags);
IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
return;
}
/* Reset differential Rx gains in NIC to prepare for chain noise calibration.
* Called after every association, but this runs only once!
* ... once chain noise is calibrated the first time, it's good forever. */
void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
{
struct iwl4965_chain_noise_data *data = NULL;
int rc = 0;
data = &(priv->chain_noise_data);
if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
struct iwl4965_calibration_cmd cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
cmd.diff_gain_a = 0;
cmd.diff_gain_b = 0;
cmd.diff_gain_c = 0;
rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd);
msleep(4);
data->state = IWL_CHAIN_NOISE_ACCUMULATE;
IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
}
return;
}
/*
* Accumulate 20 beacons of signal and noise statistics for each of
* 3 receivers/antennas/rx-chains, then figure out:
* 1) Which antennas are connected.
* 2) Differential rx gain settings to balance the 3 receivers.
*/
static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
struct iwl4965_notif_statistics *stat_resp)
{
struct iwl4965_chain_noise_data *data = NULL;
int rc = 0;
u32 chain_noise_a;
u32 chain_noise_b;
u32 chain_noise_c;
u32 chain_sig_a;
u32 chain_sig_b;
u32 chain_sig_c;
u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
u32 max_average_sig;
u16 max_average_sig_antenna_i;
u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
u16 i = 0;
u16 chan_num = INITIALIZATION_VALUE;
u32 band = INITIALIZATION_VALUE;
u32 active_chains = 0;
unsigned long flags;
struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
data = &(priv->chain_noise_data);
/* Accumulate just the first 20 beacons after the first association,
* then we're done forever. */
if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
if (data->state == IWL_CHAIN_NOISE_ALIVE)
IWL_DEBUG_CALIB("Wait for noise calib reset\n");
return;
}
spin_lock_irqsave(&priv->lock, flags);
if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
IWL_DEBUG_CALIB(" << Interference data unavailable\n");
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
chan_num = le16_to_cpu(priv->staging_rxon.channel);
/* Make sure we accumulate data for just the associated channel
* (even if scanning). */
if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
(stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
chan_num, band);
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
/* Accumulate beacon statistics values across 20 beacons */
chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
IN_BAND_FILTER;
chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
IN_BAND_FILTER;
chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
IN_BAND_FILTER;
chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
spin_unlock_irqrestore(&priv->lock, flags);
data->beacon_count++;
data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
data->beacon_count);
IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
chain_sig_a, chain_sig_b, chain_sig_c);
IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
chain_noise_a, chain_noise_b, chain_noise_c);
/* If this is the 20th beacon, determine:
* 1) Disconnected antennas (using signal strengths)
* 2) Differential gain (using silence noise) to balance receivers */
if (data->beacon_count == CAL_NUM_OF_BEACONS) {
/* Analyze signal for disconnected antenna */
average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
if (average_sig[0] >= average_sig[1]) {
max_average_sig = average_sig[0];
max_average_sig_antenna_i = 0;
active_chains = (1 << max_average_sig_antenna_i);
} else {
max_average_sig = average_sig[1];
max_average_sig_antenna_i = 1;
active_chains = (1 << max_average_sig_antenna_i);
}
if (average_sig[2] >= max_average_sig) {
max_average_sig = average_sig[2];
max_average_sig_antenna_i = 2;
active_chains = (1 << max_average_sig_antenna_i);
}
IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
average_sig[0], average_sig[1], average_sig[2]);
IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
max_average_sig, max_average_sig_antenna_i);
/* Compare signal strengths for all 3 receivers. */
for (i = 0; i < NUM_RX_CHAINS; i++) {
if (i != max_average_sig_antenna_i) {
s32 rssi_delta = (max_average_sig -
average_sig[i]);
/* If signal is very weak, compared with
* strongest, mark it as disconnected. */
if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
data->disconn_array[i] = 1;
else
active_chains |= (1 << i);
IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
"disconn_array[i] = %d\n",
i, rssi_delta, data->disconn_array[i]);
}
}
/*If both chains A & B are disconnected -
* connect B and leave A as is */
if (data->disconn_array[CHAIN_A] &&
data->disconn_array[CHAIN_B]) {
data->disconn_array[CHAIN_B] = 0;
active_chains |= (1 << CHAIN_B);
IWL_DEBUG_CALIB("both A & B chains are disconnected! "
"W/A - declare B as connected\n");
}
IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
active_chains);
/* Save for use within RXON, TX, SCAN commands, etc. */
priv->valid_antenna = active_chains;
/* Analyze noise for rx balance */
average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
for (i = 0; i < NUM_RX_CHAINS; i++) {
if (!(data->disconn_array[i]) &&
(average_noise[i] <= min_average_noise)) {
/* This means that chain i is active and has
* lower noise values so far: */
min_average_noise = average_noise[i];
min_average_noise_antenna_i = i;
}
}
data->delta_gain_code[min_average_noise_antenna_i] = 0;
IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
average_noise[0], average_noise[1],
average_noise[2]);
IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
min_average_noise, min_average_noise_antenna_i);
for (i = 0; i < NUM_RX_CHAINS; i++) {
s32 delta_g = 0;
if (!(data->disconn_array[i]) &&
(data->delta_gain_code[i] ==
CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
delta_g = average_noise[i] - min_average_noise;
data->delta_gain_code[i] = (u8)((delta_g *
10) / 15);
if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
data->delta_gain_code[i])
data->delta_gain_code[i] =
CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
data->delta_gain_code[i] =
(data->delta_gain_code[i] | (1 << 2));
} else
data->delta_gain_code[i] = 0;
}
IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
data->delta_gain_code[0],
data->delta_gain_code[1],
data->delta_gain_code[2]);
/* Differential gain gets sent to uCode only once */
if (!data->radio_write) {
struct iwl4965_calibration_cmd cmd;
data->radio_write = 1;
memset(&cmd, 0, sizeof(cmd));
cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
cmd.diff_gain_a = data->delta_gain_code[0];
cmd.diff_gain_b = data->delta_gain_code[1];
cmd.diff_gain_c = data->delta_gain_code[2];
rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
sizeof(cmd), &cmd);
if (rc)
IWL_DEBUG_CALIB("fail sending cmd "
"REPLY_PHY_CALIBRATION_CMD \n");
/* TODO we might want recalculate
* rx_chain in rxon cmd */
/* Mark so we run this algo only once! */
data->state = IWL_CHAIN_NOISE_CALIBRATED;
}
data->chain_noise_a = 0;
data->chain_noise_b = 0;
data->chain_noise_c = 0;
data->chain_signal_a = 0;
data->chain_signal_b = 0;
data->chain_signal_c = 0;
data->beacon_count = 0;
}
return;
}
static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
struct iwl4965_notif_statistics *resp)
{
int rc = 0;
u32 rx_enable_time;
u32 fa_cck;
u32 fa_ofdm;
u32 bad_plcp_cck;
u32 bad_plcp_ofdm;
u32 norm_fa_ofdm;
u32 norm_fa_cck;
struct iwl4965_sensitivity_data *data = NULL;
struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
struct statistics_rx *statistics = &(resp->rx);
unsigned long flags;
struct statistics_general_data statis;
data = &(priv->sensitivity_data);
if (!iwl4965_is_associated(priv)) {
IWL_DEBUG_CALIB("<< - not associated\n");
return;
}
spin_lock_irqsave(&priv->lock, flags);
if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
IWL_DEBUG_CALIB("<< invalid data.\n");
spin_unlock_irqrestore(&priv->lock, flags);
return;
}
/* Extract Statistics: */
rx_enable_time = le32_to_cpu(rx_info->channel_load);
fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
statis.beacon_silence_rssi_a =
le32_to_cpu(statistics->general.beacon_silence_rssi_a);
statis.beacon_silence_rssi_b =
le32_to_cpu(statistics->general.beacon_silence_rssi_b);
statis.beacon_silence_rssi_c =
le32_to_cpu(statistics->general.beacon_silence_rssi_c);
statis.beacon_energy_a =
le32_to_cpu(statistics->general.beacon_energy_a);
statis.beacon_energy_b =
le32_to_cpu(statistics->general.beacon_energy_b);
statis.beacon_energy_c =
le32_to_cpu(statistics->general.beacon_energy_c);
spin_unlock_irqrestore(&priv->lock, flags);
IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
if (!rx_enable_time) {
IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
return;
}
/* These statistics increase monotonically, and do not reset
* at each beacon. Calculate difference from last value, or just
* use the new statistics value if it has reset or wrapped around. */
if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
data->last_bad_plcp_cnt_cck = bad_plcp_cck;
else {
bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
data->last_bad_plcp_cnt_cck += bad_plcp_cck;
}
if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
else {
bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
}
if (data->last_fa_cnt_ofdm > fa_ofdm)
data->last_fa_cnt_ofdm = fa_ofdm;
else {
fa_ofdm -= data->last_fa_cnt_ofdm;
data->last_fa_cnt_ofdm += fa_ofdm;
}
if (data->last_fa_cnt_cck > fa_cck)
data->last_fa_cnt_cck = fa_cck;
else {
fa_cck -= data->last_fa_cnt_cck;
data->last_fa_cnt_cck += fa_cck;
}
/* Total aborted signal locks */
norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
norm_fa_cck = fa_cck + bad_plcp_cck;
IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
return;
}
static void iwl4965_bg_sensitivity_work(struct work_struct *work)
{
struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
sensitivity_work);
mutex_lock(&priv->mutex);
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status)) {
mutex_unlock(&priv->mutex);
return;
}
if (priv->start_calib) {
iwl4965_noise_calibration(priv, &priv->statistics);
if (priv->sensitivity_data.state ==
IWL_SENS_CALIB_NEED_REINIT) {
iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
} else
iwl4965_sensitivity_calibration(priv,
&priv->statistics);
}
mutex_unlock(&priv->mutex);
return;
}
#endif /*CONFIG_IWL4965_SENSITIVITY*/
static void iwl4965_bg_txpower_work(struct work_struct *work)
{
struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
txpower_work);
/* If a scan happened to start before we got here
* then just return; the statistics notification will
* kick off another scheduled work to compensate for
* any temperature delta we missed here. */
if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
test_bit(STATUS_SCANNING, &priv->status))
return;
mutex_lock(&priv->mutex);
/* Regardless of if we are assocaited, we must reconfigure the
* TX power since frames can be sent on non-radar channels while
* not associated */
iwl4965_hw_reg_send_txpower(priv);
/* Update last_temperature to keep is_calib_needed from running
* when it isn't needed... */
priv->last_temperature = priv->temperature;
mutex_unlock(&priv->mutex);
}
/*
* Acquire priv->lock before calling this function !
*/
static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
{
iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
(index & 0xff) | (txq_id << 8));
iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
}
/**
* iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
* @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
* @scd_retry: (1) Indicates queue will be used in aggregation mode
*
* NOTE: Acquire priv->lock before calling this function !
*/
static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
struct iwl4965_tx_queue *txq,
int tx_fifo_id, int scd_retry)
{
int txq_id = txq->q.id;
/* Find out whether to activate Tx queue */
int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
/* Set up and activate */
iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
(active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
(scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
(scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
SCD_QUEUE_STTS_REG_MSK);
txq->sched_retry = scd_retry;
IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
active ? "Activate" : "Deactivate",
scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
}
static const u16 default_queue_to_tx_fifo[] = {
IWL_TX_FIFO_AC3,
IWL_TX_FIFO_AC2,
IWL_TX_FIFO_AC1,
IWL_TX_FIFO_AC0,
IWL_CMD_FIFO_NUM,
IWL_TX_FIFO_HCCA_1,
IWL_TX_FIFO_HCCA_2
};
static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
{
set_bit(txq_id, &priv->txq_ctx_active_msk);
}
static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
{
clear_bit(txq_id, &priv->txq_ctx_active_msk);
}
int iwl4965_alive_notify(struct iwl4965_priv *priv)
{
u32 a;
int i = 0;
unsigned long flags;
int rc;
spin_lock_irqsave(&priv->lock, flags);
#ifdef CONFIG_IWL4965_SENSITIVITY
memset(&(priv->sensitivity_data), 0,
sizeof(struct iwl4965_sensitivity_data));
memset(&(priv->chain_noise_data), 0,
sizeof(struct iwl4965_chain_noise_data));
for (i = 0; i < NUM_RX_CHAINS; i++)
priv->chain_noise_data.delta_gain_code[i] =
CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
#endif /* CONFIG_IWL4965_SENSITIVITY*/
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* Clear 4965's internal Tx Scheduler data base */
priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
iwl4965_write_targ_mem(priv, a, 0);
for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
iwl4965_write_targ_mem(priv, a, 0);
for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
iwl4965_write_targ_mem(priv, a, 0);
/* Tel 4965 where to find Tx byte count tables */
iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
(priv->hw_setting.shared_phys +
offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
/* Disable chain mode for all queues */
iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
/* Initialize each Tx queue (including the command queue) */
for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
/* TFD circular buffer read/write indexes */
iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
/* Max Tx Window size for Scheduler-ACK mode */
iwl4965_write_targ_mem(priv, priv->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(i),
(SCD_WIN_SIZE <<
SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
/* Frame limit */
iwl4965_write_targ_mem(priv, priv->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(i) +
sizeof(u32),
(SCD_FRAME_LIMIT <<
SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
}
iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
(1 << priv->hw_setting.max_txq_num) - 1);
/* Activate all Tx DMA/FIFO channels */
iwl4965_write_prph(priv, KDR_SCD_TXFACT,
SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
/* Map each Tx/cmd queue to its corresponding fifo */
for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
int ac = default_queue_to_tx_fifo[i];
iwl4965_txq_ctx_activate(priv, i);
iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
}
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
/**
* iwl4965_hw_set_hw_setting
*
* Called when initializing driver
*/
int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
{
/* Allocate area for Tx byte count tables and Rx queue status */
priv->hw_setting.shared_virt =
pci_alloc_consistent(priv->pci_dev,
sizeof(struct iwl4965_shared),
&priv->hw_setting.shared_phys);
if (!priv->hw_setting.shared_virt)
return -1;
memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
if (iwl4965_param_amsdu_size_8K)
priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
else
priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
priv->hw_setting.tx_ant_num = 2;
return 0;
}
/**
* iwl4965_hw_txq_ctx_free - Free TXQ Context
*
* Destroy all TX DMA queues and structures
*/
void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
{
int txq_id;
/* Tx queues */
for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
/* Keep-warm buffer */
iwl4965_kw_free(priv);
}
/**
* iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
*
* Does NOT advance any TFD circular buffer read/write indexes
* Does NOT free the TFD itself (which is within circular buffer)
*/
int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
{
struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
struct pci_dev *dev = priv->pci_dev;
int i;
int counter = 0;
int index, is_odd;
/* Host command buffers stay mapped in memory, nothing to clean */
if (txq->q.id == IWL_CMD_QUEUE_NUM)
return 0;
/* Sanity check on number of chunks */
counter = IWL_GET_BITS(*bd, num_tbs);
if (counter > MAX_NUM_OF_TBS) {
IWL_ERROR("Too many chunks: %i\n", counter);
/* @todo issue fatal error, it is quite serious situation */
return 0;
}
/* Unmap chunks, if any.
* TFD info for odd chunks is different format than for even chunks. */
for (i = 0; i < counter; i++) {
index = i / 2;
is_odd = i & 0x1;
if (is_odd)
pci_unmap_single(
dev,
IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
(IWL_GET_BITS(bd->pa[index],
tb2_addr_hi20) << 16),
IWL_GET_BITS(bd->pa[index], tb2_len),
PCI_DMA_TODEVICE);
else if (i > 0)
pci_unmap_single(dev,
le32_to_cpu(bd->pa[index].tb1_addr),
IWL_GET_BITS(bd->pa[index], tb1_len),
PCI_DMA_TODEVICE);
/* Free SKB, if any, for this chunk */
if (txq->txb[txq->q.read_ptr].skb[i]) {
struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
dev_kfree_skb(skb);
txq->txb[txq->q.read_ptr].skb[i] = NULL;
}
}
return 0;
}
int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
{
IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
return -EINVAL;
}
static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
{
s32 sign = 1;
if (num < 0) {
sign = -sign;
num = -num;
}
if (denom < 0) {
sign = -sign;
denom = -denom;
}
*res = 1;
*res = ((num * 2 + denom) / (denom * 2)) * sign;
return 1;
}
/**
* iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
*
* Determines power supply voltage compensation for txpower calculations.
* Returns number of 1/2-dB steps to subtract from gain table index,
* to compensate for difference between power supply voltage during
* factory measurements, vs. current power supply voltage.
*
* Voltage indication is higher for lower voltage.
* Lower voltage requires more gain (lower gain table index).
*/
static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
s32 current_voltage)
{
s32 comp = 0;
if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
(TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
return 0;
iwl4965_math_div_round(current_voltage - eeprom_voltage,
TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
if (current_voltage > eeprom_voltage)
comp *= 2;
if ((comp < -2) || (comp > 2))
comp = 0;
return comp;
}
static const struct iwl4965_channel_info *
iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv,
enum ieee80211_band band, u16 channel)
{
const struct iwl4965_channel_info *ch_info;
ch_info = iwl4965_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info))
return NULL;
return ch_info;
}
static s32 iwl4965_get_tx_atten_grp(u16 channel)
{
if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
return CALIB_CH_GROUP_5;
if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
return CALIB_CH_GROUP_1;
if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
return CALIB_CH_GROUP_2;
if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
return CALIB_CH_GROUP_3;
if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
return CALIB_CH_GROUP_4;
IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
return -1;
}
static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
{
s32 b = -1;
for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
continue;
if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
&& (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
break;
}
return b;
}
static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
{
s32 val;
if (x2 == x1)
return y1;
else {
iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
return val + y2;
}
}
/**
* iwl4965_interpolate_chan - Interpolate factory measurements for one channel
*
* Interpolates factory measurements from the two sample channels within a
* sub-band, to apply to channel of interest. Interpolation is proportional to
* differences in channel frequencies, which is proportional to differences
* in channel number.
*/
static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
struct iwl4965_eeprom_calib_ch_info *chan_info)
{
s32 s = -1;
u32 c;
u32 m;
const struct iwl4965_eeprom_calib_measure *m1;
const struct iwl4965_eeprom_calib_measure *m2;
struct iwl4965_eeprom_calib_measure *omeas;
u32 ch_i1;
u32 ch_i2;
s = iwl4965_get_sub_band(priv, channel);
if (s >= EEPROM_TX_POWER_BANDS) {
IWL_ERROR("Tx Power can not find channel %d ", channel);
return -1;
}
ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
chan_info->ch_num = (u8) channel;
IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
channel, s, ch_i1, ch_i2);
for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
measurements[c][m]);
m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
measurements[c][m]);
omeas = &(chan_info->measurements[c][m]);
omeas->actual_pow =
(u8) iwl4965_interpolate_value(channel, ch_i1,
m1->actual_pow,
ch_i2,
m2->actual_pow);
omeas->gain_idx =
(u8) iwl4965_interpolate_value(channel, ch_i1,
m1->gain_idx, ch_i2,
m2->gain_idx);
omeas->temperature =
(u8) iwl4965_interpolate_value(channel, ch_i1,
m1->temperature,
ch_i2,
m2->temperature);
omeas->pa_det =
(s8) iwl4965_interpolate_value(channel, ch_i1,
m1->pa_det, ch_i2,
m2->pa_det);
IWL_DEBUG_TXPOWER
("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
m1->actual_pow, m2->actual_pow, omeas->actual_pow);
IWL_DEBUG_TXPOWER
("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
m1->gain_idx, m2->gain_idx, omeas->gain_idx);
IWL_DEBUG_TXPOWER
("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
m1->pa_det, m2->pa_det, omeas->pa_det);
IWL_DEBUG_TXPOWER
("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
m1->temperature, m2->temperature,
omeas->temperature);
}
}
return 0;
}
/* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
* for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
static s32 back_off_table[] = {
10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
10 /* CCK */
};
/* Thermal compensation values for txpower for various frequency ranges ...
* ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
static struct iwl4965_txpower_comp_entry {
s32 degrees_per_05db_a;
s32 degrees_per_05db_a_denom;
} tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
{9, 2}, /* group 0 5.2, ch 34-43 */
{4, 1}, /* group 1 5.2, ch 44-70 */
{4, 1}, /* group 2 5.2, ch 71-124 */
{4, 1}, /* group 3 5.2, ch 125-200 */
{3, 1} /* group 4 2.4, ch all */
};
static s32 get_min_power_index(s32 rate_power_index, u32 band)
{
if (!band) {
if ((rate_power_index & 7) <= 4)
return MIN_TX_GAIN_INDEX_52GHZ_EXT;
}
return MIN_TX_GAIN_INDEX;
}
struct gain_entry {
u8 dsp;
u8 radio;
};
static const struct gain_entry gain_table[2][108] = {
/* 5.2GHz power gain index table */
{
{123, 0x3F}, /* highest txpower */
{117, 0x3F},
{110, 0x3F},
{104, 0x3F},
{98, 0x3F},
{110, 0x3E},
{104, 0x3E},
{98, 0x3E},
{110, 0x3D},
{104, 0x3D},
{98, 0x3D},
{110, 0x3C},
{104, 0x3C},
{98, 0x3C},
{110, 0x3B},
{104, 0x3B},
{98, 0x3B},
{110, 0x3A},
{104, 0x3A},
{98, 0x3A},
{110, 0x39},
{104, 0x39},
{98, 0x39},
{110, 0x38},
{104, 0x38},
{98, 0x38},
{110, 0x37},
{104, 0x37},
{98, 0x37},
{110, 0x36},
{104, 0x36},
{98, 0x36},
{110, 0x35},
{104, 0x35},
{98, 0x35},
{110, 0x34},
{104, 0x34},
{98, 0x34},
{110, 0x33},
{104, 0x33},
{98, 0x33},
{110, 0x32},
{104, 0x32},
{98, 0x32},
{110, 0x31},
{104, 0x31},
{98, 0x31},
{110, 0x30},
{104, 0x30},
{98, 0x30},
{110, 0x25},
{104, 0x25},
{98, 0x25},
{110, 0x24},
{104, 0x24},
{98, 0x24},
{110, 0x23},
{104, 0x23},
{98, 0x23},
{110, 0x22},
{104, 0x18},
{98, 0x18},
{110, 0x17},
{104, 0x17},
{98, 0x17},
{110, 0x16},
{104, 0x16},
{98, 0x16},
{110, 0x15},
{104, 0x15},
{98, 0x15},
{110, 0x14},
{104, 0x14},
{98, 0x14},
{110, 0x13},
{104, 0x13},
{98, 0x13},
{110, 0x12},
{104, 0x08},
{98, 0x08},
{110, 0x07},
{104, 0x07},
{98, 0x07},
{110, 0x06},
{104, 0x06},
{98, 0x06},
{110, 0x05},
{104, 0x05},
{98, 0x05},
{110, 0x04},
{104, 0x04},
{98, 0x04},
{110, 0x03},
{104, 0x03},
{98, 0x03},
{110, 0x02},
{104, 0x02},
{98, 0x02},
{110, 0x01},
{104, 0x01},
{98, 0x01},
{110, 0x00},
{104, 0x00},
{98, 0x00},
{93, 0x00},
{88, 0x00},
{83, 0x00},
{78, 0x00},
},
/* 2.4GHz power gain index table */
{
{110, 0x3f}, /* highest txpower */
{104, 0x3f},
{98, 0x3f},
{110, 0x3e},
{104, 0x3e},
{98, 0x3e},
{110, 0x3d},
{104, 0x3d},
{98, 0x3d},
{110, 0x3c},
{104, 0x3c},
{98, 0x3c},
{110, 0x3b},
{104, 0x3b},
{98, 0x3b},
{110, 0x3a},
{104, 0x3a},
{98, 0x3a},
{110, 0x39},
{104, 0x39},
{98, 0x39},
{110, 0x38},
{104, 0x38},
{98, 0x38},
{110, 0x37},
{104, 0x37},
{98, 0x37},
{110, 0x36},
{104, 0x36},
{98, 0x36},
{110, 0x35},
{104, 0x35},
{98, 0x35},
{110, 0x34},
{104, 0x34},
{98, 0x34},
{110, 0x33},
{104, 0x33},
{98, 0x33},
{110, 0x32},
{104, 0x32},
{98, 0x32},
{110, 0x31},
{104, 0x31},
{98, 0x31},
{110, 0x30},
{104, 0x30},
{98, 0x30},
{110, 0x6},
{104, 0x6},
{98, 0x6},
{110, 0x5},
{104, 0x5},
{98, 0x5},
{110, 0x4},
{104, 0x4},
{98, 0x4},
{110, 0x3},
{104, 0x3},
{98, 0x3},
{110, 0x2},
{104, 0x2},
{98, 0x2},
{110, 0x1},
{104, 0x1},
{98, 0x1},
{110, 0x0},
{104, 0x0},
{98, 0x0},
{97, 0},
{96, 0},
{95, 0},
{94, 0},
{93, 0},
{92, 0},
{91, 0},
{90, 0},
{89, 0},
{88, 0},
{87, 0},
{86, 0},
{85, 0},
{84, 0},
{83, 0},
{82, 0},
{81, 0},
{80, 0},
{79, 0},
{78, 0},
{77, 0},
{76, 0},
{75, 0},
{74, 0},
{73, 0},
{72, 0},
{71, 0},
{70, 0},
{69, 0},
{68, 0},
{67, 0},
{66, 0},
{65, 0},
{64, 0},
{63, 0},
{62, 0},
{61, 0},
{60, 0},
{59, 0},
}
};
static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
u8 is_fat, u8 ctrl_chan_high,
struct iwl4965_tx_power_db *tx_power_tbl)
{
u8 saturation_power;
s32 target_power;
s32 user_target_power;
s32 power_limit;
s32 current_temp;
s32 reg_limit;
s32 current_regulatory;
s32 txatten_grp = CALIB_CH_GROUP_MAX;
int i;
int c;
const struct iwl4965_channel_info *ch_info = NULL;
struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
const struct iwl4965_eeprom_calib_measure *measurement;
s16 voltage;
s32 init_voltage;
s32 voltage_compensation;
s32 degrees_per_05db_num;
s32 degrees_per_05db_denom;
s32 factory_temp;
s32 temperature_comp[2];
s32 factory_gain_index[2];
s32 factory_actual_pwr[2];
s32 power_index;
/* Sanity check requested level (dBm) */
if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
IWL_WARNING("Requested user TXPOWER %d below limit.\n",
priv->user_txpower_limit);
return -EINVAL;
}
if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
IWL_WARNING("Requested user TXPOWER %d above limit.\n",
priv->user_txpower_limit);
return -EINVAL;
}
/* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
* are used for indexing into txpower table) */
user_target_power = 2 * priv->user_txpower_limit;
/* Get current (RXON) channel, band, width */
ch_info =
iwl4965_get_channel_txpower_info(priv, priv->band, channel);
IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
is_fat);
if (!ch_info)
return -EINVAL;
/* get txatten group, used to select 1) thermal txpower adjustment
* and 2) mimo txpower balance between Tx chains. */
txatten_grp = iwl4965_get_tx_atten_grp(channel);
if (txatten_grp < 0)
return -EINVAL;
IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
channel, txatten_grp);
if (is_fat) {
if (ctrl_chan_high)
channel -= 2;
else
channel += 2;
}
/* hardware txpower limits ...
* saturation (clipping distortion) txpowers are in half-dBm */
if (band)
saturation_power = priv->eeprom.calib_info.saturation_power24;
else
saturation_power = priv->eeprom.calib_info.saturation_power52;
if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
saturation_power > IWL_TX_POWER_SATURATION_MAX) {
if (band)
saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
else
saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
}
/* regulatory txpower limits ... reg_limit values are in half-dBm,
* max_power_avg values are in dBm, convert * 2 */
if (is_fat)
reg_limit = ch_info->fat_max_power_avg * 2;
else
reg_limit = ch_info->max_power_avg * 2;
if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
(reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
if (band)
reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
else
reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
}
/* Interpolate txpower calibration values for this channel,
* based on factory calibration tests on spaced channels. */
iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
/* calculate tx gain adjustment based on power supply voltage */
voltage = priv->eeprom.calib_info.voltage;
init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
voltage_compensation =
iwl4965_get_voltage_compensation(voltage, init_voltage);
IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
init_voltage,
voltage, voltage_compensation);
/* get current temperature (Celsius) */
current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
current_temp = KELVIN_TO_CELSIUS(current_temp);
/* select thermal txpower adjustment params, based on channel group
* (same frequency group used for mimo txatten adjustment) */
degrees_per_05db_num =
tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
degrees_per_05db_denom =
tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
/* get per-chain txpower values from factory measurements */
for (c = 0; c < 2; c++) {
measurement = &ch_eeprom_info.measurements[c][1];
/* txgain adjustment (in half-dB steps) based on difference
* between factory and current temperature */
factory_temp = measurement->temperature;
iwl4965_math_div_round((current_temp - factory_temp) *
degrees_per_05db_denom,
degrees_per_05db_num,
&temperature_comp[c]);
factory_gain_index[c] = measurement->gain_idx;
factory_actual_pwr[c] = measurement->actual_pow;
IWL_DEBUG_TXPOWER("chain = %d\n", c);
IWL_DEBUG_TXPOWER("fctry tmp %d, "
"curr tmp %d, comp %d steps\n",
factory_temp, current_temp,
temperature_comp[c]);
IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
factory_gain_index[c],
factory_actual_pwr[c]);
}
/* for each of 33 bit-rates (including 1 for CCK) */
for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
u8 is_mimo_rate;
union iwl4965_tx_power_dual_stream tx_power;
/* for mimo, reduce each chain's txpower by half
* (3dB, 6 steps), so total output power is regulatory
* compliant. */
if (i & 0x8) {
current_regulatory = reg_limit -
IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
is_mimo_rate = 1;
} else {
current_regulatory = reg_limit;
is_mimo_rate = 0;
}
/* find txpower limit, either hardware or regulatory */
power_limit = saturation_power - back_off_table[i];
if (power_limit > current_regulatory)
power_limit = current_regulatory;
/* reduce user's txpower request if necessary
* for this rate on this channel */
target_power = user_target_power;
if (target_power > power_limit)
target_power = power_limit;
IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
i, saturation_power - back_off_table[i],
current_regulatory, user_target_power,
target_power);
/* for each of 2 Tx chains (radio transmitters) */
for (c = 0; c < 2; c++) {
s32 atten_value;
if (is_mimo_rate)
atten_value =
(s32)le32_to_cpu(priv->card_alive_init.
tx_atten[txatten_grp][c]);
else
atten_value = 0;
/* calculate index; higher index means lower txpower */
power_index = (u8) (factory_gain_index[c] -
(target_power -
factory_actual_pwr[c]) -
temperature_comp[c] -
voltage_compensation +
atten_value);
/* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
power_index); */
if (power_index < get_min_power_index(i, band))
power_index = get_min_power_index(i, band);
/* adjust 5 GHz index to support negative indexes */
if (!band)
power_index += 9;
/* CCK, rate 32, reduce txpower for CCK */
if (i == POWER_TABLE_CCK_ENTRY)
power_index +=
IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
/* stay within the table! */
if (power_index > 107) {
IWL_WARNING("txpower index %d > 107\n",
power_index);
power_index = 107;
}
if (power_index < 0) {
IWL_WARNING("txpower index %d < 0\n",
power_index);
power_index = 0;
}
/* fill txpower command for this rate/chain */
tx_power.s.radio_tx_gain[c] =
gain_table[band][power_index].radio;
tx_power.s.dsp_predis_atten[c] =
gain_table[band][power_index].dsp;
IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
"gain 0x%02x dsp %d\n",
c, atten_value, power_index,
tx_power.s.radio_tx_gain[c],
tx_power.s.dsp_predis_atten[c]);
}/* for each chain */
tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
}/* for each rate */
return 0;
}
/**
* iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
*
* Uses the active RXON for channel, band, and characteristics (fat, high)
* The power limit is taken from priv->user_txpower_limit.
*/
int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
{
struct iwl4965_txpowertable_cmd cmd = { 0 };
int rc = 0;
u8 band = 0;
u8 is_fat = 0;
u8 ctrl_chan_high = 0;
if (test_bit(STATUS_SCANNING, &priv->status)) {
/* If this gets hit a lot, switch it to a BUG() and catch
* the stack trace to find out who is calling this during
* a scan. */
IWL_WARNING("TX Power requested while scanning!\n");
return -EAGAIN;
}
band = priv->band == IEEE80211_BAND_2GHZ;
is_fat = is_fat_channel(priv->active_rxon.flags);
if (is_fat &&
(priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
ctrl_chan_high = 1;
cmd.band = band;
cmd.channel = priv->active_rxon.channel;
rc = iwl4965_fill_txpower_tbl(priv, band,
le16_to_cpu(priv->active_rxon.channel),
is_fat, ctrl_chan_high, &cmd.tx_power);
if (rc)
return rc;
rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
return rc;
}
int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
{
int rc;
u8 band = 0;
u8 is_fat = 0;
u8 ctrl_chan_high = 0;
struct iwl4965_channel_switch_cmd cmd = { 0 };
const struct iwl4965_channel_info *ch_info;
band = priv->band == IEEE80211_BAND_2GHZ;
ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
is_fat = is_fat_channel(priv->staging_rxon.flags);
if (is_fat &&
(priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
ctrl_chan_high = 1;
cmd.band = band;
cmd.expect_beacon = 0;
cmd.channel = cpu_to_le16(channel);
cmd.rxon_flags = priv->active_rxon.flags;
cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
if (ch_info)
cmd.expect_beacon = is_channel_radar(ch_info);
else
cmd.expect_beacon = 1;
rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
ctrl_chan_high, &cmd.tx_power);
if (rc) {
IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
return rc;
}
rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
return rc;
}
#define RTS_HCCA_RETRY_LIMIT 3
#define RTS_DFAULT_RETRY_LIMIT 60
void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
struct iwl4965_cmd *cmd,
struct ieee80211_tx_control *ctrl,
struct ieee80211_hdr *hdr, int sta_id,
int is_hcca)
{
struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
u8 rts_retry_limit = 0;
u8 data_retry_limit = 0;
u16 fc = le16_to_cpu(hdr->frame_control);
u8 rate_plcp;
u16 rate_flags = 0;
int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
rate_plcp = iwl4965_rates[rate_idx].plcp;
rts_retry_limit = (is_hcca) ?
RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
rate_flags |= RATE_MCS_CCK_MSK;
if (ieee80211_is_probe_response(fc)) {
data_retry_limit = 3;
if (data_retry_limit < rts_retry_limit)
rts_retry_limit = data_retry_limit;
} else
data_retry_limit = IWL_DEFAULT_TX_RETRY;
if (priv->data_retry_limit != -1)
data_retry_limit = priv->data_retry_limit;
if (ieee80211_is_data(fc)) {
tx->initial_rate_index = 0;
tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
} else {
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_AUTH:
case IEEE80211_STYPE_DEAUTH:
case IEEE80211_STYPE_ASSOC_REQ:
case IEEE80211_STYPE_REASSOC_REQ:
if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
}
break;
default:
break;
}
/* Alternate between antenna A and B for successive frames */
if (priv->use_ant_b_for_management_frame) {
priv->use_ant_b_for_management_frame = 0;
rate_flags |= RATE_MCS_ANT_B_MSK;
} else {
priv->use_ant_b_for_management_frame = 1;
rate_flags |= RATE_MCS_ANT_A_MSK;
}
}
tx->rts_retry_limit = rts_retry_limit;
tx->data_retry_limit = data_retry_limit;
tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
}
int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
{
struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
}
int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
{
return priv->temperature;
}
unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
struct iwl4965_frame *frame, u8 rate)
{
struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
unsigned int frame_size;
tx_beacon_cmd = &frame->u.beacon;
memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
frame_size = iwl4965_fill_beacon_frame(priv,
tx_beacon_cmd->frame,
iwl4965_broadcast_addr,
sizeof(frame->u) - sizeof(*tx_beacon_cmd));
BUG_ON(frame_size > MAX_MPDU_SIZE);
tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
tx_beacon_cmd->tx.rate_n_flags =
iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
else
tx_beacon_cmd->tx.rate_n_flags =
iwl4965_hw_set_rate_n_flags(rate, 0);
tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
return (sizeof(*tx_beacon_cmd) + frame_size);
}
/*
* Tell 4965 where to find circular buffer of Tx Frame Descriptors for
* given Tx queue, and enable the DMA channel used for that queue.
*
* 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
* channels supported in hardware.
*/
int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
{
int rc;
unsigned long flags;
int txq_id = txq->q.id;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* Circular buffer (TFD queue in DRAM) physical base address */
iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
txq->q.dma_addr >> 8);
/* Enable DMA channel, using same id as for TFD queue */
iwl4965_write_direct32(
priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
dma_addr_t addr, u16 len)
{
int index, is_odd;
struct iwl4965_tfd_frame *tfd = ptr;
u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
/* Each TFD can point to a maximum 20 Tx buffers */
if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
IWL_ERROR("Error can not send more than %d chunks\n",
MAX_NUM_OF_TBS);
return -EINVAL;
}
index = num_tbs / 2;
is_odd = num_tbs & 0x1;
if (!is_odd) {
tfd->pa[index].tb1_addr = cpu_to_le32(addr);
IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
iwl_get_dma_hi_address(addr));
IWL_SET_BITS(tfd->pa[index], tb1_len, len);
} else {
IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
(u32) (addr & 0xffff));
IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
IWL_SET_BITS(tfd->pa[index], tb2_len, len);
}
IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
return 0;
}
static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
{
u16 hw_version = priv->eeprom.board_revision_4965;
IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
((hw_version >> 8) & 0x0F),
((hw_version >> 8) >> 4), (hw_version & 0x00FF));
IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
priv->eeprom.board_pba_number_4965);
}
#define IWL_TX_CRC_SIZE 4
#define IWL_TX_DELIMITER_SIZE 4
/**
* iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
*/
int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
struct iwl4965_tx_queue *txq, u16 byte_cnt)
{
int len;
int txq_id = txq->q.id;
struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
if (txq->need_update == 0)
return 0;
len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
/* Set up byte count within first 256 entries */
IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
tfd_offset[txq->q.write_ptr], byte_cnt, len);
/* If within first 64 entries, duplicate at end */
if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
byte_cnt, len);
return 0;
}
/**
* iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
*
* Selects how many and which Rx receivers/antennas/chains to use.
* This should not be used for scan command ... it puts data in wrong place.
*/
void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
{
u8 is_single = is_single_stream(priv);
u8 idle_state, rx_state;
priv->staging_rxon.rx_chain = 0;
rx_state = idle_state = 3;
/* Tell uCode which antennas are actually connected.
* Before first association, we assume all antennas are connected.
* Just after first association, iwl4965_noise_calibration()
* checks which antennas actually *are* connected. */
priv->staging_rxon.rx_chain |=
cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
/* How many receivers should we use? */
iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
priv->staging_rxon.rx_chain |=
cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
priv->staging_rxon.rx_chain |=
cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
if (!is_single && (rx_state >= 2) &&
!test_bit(STATUS_POWER_PMI, &priv->status))
priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
else
priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
}
/**
* sign_extend - Sign extend a value using specified bit as sign-bit
*
* Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
* and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
*
* @param oper value to sign extend
* @param index 0 based bit index (0<=index<32) to sign bit
*/
static s32 sign_extend(u32 oper, int index)
{
u8 shift = 31 - index;
return (s32)(oper << shift) >> shift;
}
/**
* iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
* @statistics: Provides the temperature reading from the uCode
*
* A return of <0 indicates bogus data in the statistics
*/
int iwl4965_get_temperature(const struct iwl4965_priv *priv)
{
s32 temperature;
s32 vt;
s32 R1, R2, R3;
u32 R4;
if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
(priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
} else {
IWL_DEBUG_TEMP("Running temperature calibration\n");
R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
}
/*
* Temperature is only 23 bits, so sign extend out to 32.
*
* NOTE If we haven't received a statistics notification yet
* with an updated temperature, use R4 provided to us in the
* "initialize" ALIVE response.
*/
if (!test_bit(STATUS_TEMPERATURE, &priv->status))
vt = sign_extend(R4, 23);
else
vt = sign_extend(
le32_to_cpu(priv->statistics.general.temperature), 23);
IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
R1, R2, R3, vt);
if (R3 == R1) {
IWL_ERROR("Calibration conflict R1 == R3\n");
return -1;
}
/* Calculate temperature in degrees Kelvin, adjust by 97%.
* Add offset to center the adjustment around 0 degrees Centigrade. */
temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
temperature /= (R3 - R1);
temperature = (temperature * 97) / 100 +
TEMPERATURE_CALIB_KELVIN_OFFSET;
IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
KELVIN_TO_CELSIUS(temperature));
return temperature;
}
/* Adjust Txpower only if temperature variance is greater than threshold. */
#define IWL_TEMPERATURE_THRESHOLD 3
/**
* iwl4965_is_temp_calib_needed - determines if new calibration is needed
*
* If the temperature changed has changed sufficiently, then a recalibration
* is needed.
*
* Assumes caller will replace priv->last_temperature once calibration
* executed.
*/
static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
{
int temp_diff;
if (!test_bit(STATUS_STATISTICS, &priv->status)) {
IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
return 0;
}
temp_diff = priv->temperature - priv->last_temperature;
/* get absolute value */
if (temp_diff < 0) {
IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
temp_diff = -temp_diff;
} else if (temp_diff == 0)
IWL_DEBUG_POWER("Same temp, \n");
else
IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
return 0;
}
IWL_DEBUG_POWER("Thermal txpower calib needed\n");
return 1;
}
/* Calculate noise level, based on measurements during network silence just
* before arriving beacon. This measurement can be done only if we know
* exactly when to expect beacons, therefore only when we're associated. */
static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
{
struct statistics_rx_non_phy *rx_info
= &(priv->statistics.rx.general);
int num_active_rx = 0;
int total_silence = 0;
int bcn_silence_a =
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
int bcn_silence_b =
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
int bcn_silence_c =
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
if (bcn_silence_a) {
total_silence += bcn_silence_a;
num_active_rx++;
}
if (bcn_silence_b) {
total_silence += bcn_silence_b;
num_active_rx++;
}
if (bcn_silence_c) {
total_silence += bcn_silence_c;
num_active_rx++;
}
/* Average among active antennas */
if (num_active_rx)
priv->last_rx_noise = (total_silence / num_active_rx) - 107;
else
priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
bcn_silence_a, bcn_silence_b, bcn_silence_c,
priv->last_rx_noise);
}
void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
int change;
s32 temp;
IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
(int)sizeof(priv->statistics), pkt->len);
change = ((priv->statistics.general.temperature !=
pkt->u.stats.general.temperature) ||
((priv->statistics.flag &
STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
(pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
set_bit(STATUS_STATISTICS, &priv->status);
/* Reschedule the statistics timer to occur in
* REG_RECALIB_PERIOD seconds to ensure we get a
* thermal update even if the uCode doesn't give
* us one */
mod_timer(&priv->statistics_periodic, jiffies +
msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
iwl4965_rx_calc_noise(priv);
#ifdef CONFIG_IWL4965_SENSITIVITY
queue_work(priv->workqueue, &priv->sensitivity_work);
#endif
}
/* If the hardware hasn't reported a change in
* temperature then don't bother computing a
* calibrated temperature value */
if (!change)
return;
temp = iwl4965_get_temperature(priv);
if (temp < 0)
return;
if (priv->temperature != temp) {
if (priv->temperature)
IWL_DEBUG_TEMP("Temperature changed "
"from %dC to %dC\n",
KELVIN_TO_CELSIUS(priv->temperature),
KELVIN_TO_CELSIUS(temp));
else
IWL_DEBUG_TEMP("Temperature "
"initialized to %dC\n",
KELVIN_TO_CELSIUS(temp));
}
priv->temperature = temp;
set_bit(STATUS_TEMPERATURE, &priv->status);
if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
iwl4965_is_temp_calib_needed(priv))
queue_work(priv->workqueue, &priv->txpower_work);
}
static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
struct sk_buff *skb,
struct iwl4965_rx_phy_res *rx_start,
struct ieee80211_rx_status *stats,
u32 ampdu_status)
{
s8 signal = stats->ssi;
s8 noise = 0;
int rate = stats->rate_idx;
u64 tsf = stats->mactime;
__le16 phy_flags_hw = rx_start->phy_flags;
struct iwl4965_rt_rx_hdr {
struct ieee80211_radiotap_header rt_hdr;
__le64 rt_tsf; /* TSF */
u8 rt_flags; /* radiotap packet flags */
u8 rt_rate; /* rate in 500kb/s */
__le16 rt_channelMHz; /* channel in MHz */
__le16 rt_chbitmask; /* channel bitfield */
s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
s8 rt_dbmnoise;
u8 rt_antenna; /* antenna number */
} __attribute__ ((packed)) *iwl4965_rt;
/* TODO: We won't have enough headroom for HT frames. Fix it later. */
if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
if (net_ratelimit())
printk(KERN_ERR "not enough headroom [%d] for "
"radiotap head [%zd]\n",
skb_headroom(skb), sizeof(*iwl4965_rt));
return;
}
/* put radiotap header in front of 802.11 header and data */
iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
/* initialise radiotap header */
iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
iwl4965_rt->rt_hdr.it_pad = 0;
/* total header + data */
put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
&iwl4965_rt->rt_hdr.it_len);
/* Indicate all the fields we add to the radiotap header */
put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
(1 << IEEE80211_RADIOTAP_FLAGS) |
(1 << IEEE80211_RADIOTAP_RATE) |
(1 << IEEE80211_RADIOTAP_CHANNEL) |
(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
(1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
(1 << IEEE80211_RADIOTAP_ANTENNA)),
&iwl4965_rt->rt_hdr.it_present);
/* Zero the flags, we'll add to them as we go */
iwl4965_rt->rt_flags = 0;
put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
iwl4965_rt->rt_dbmsignal = signal;
iwl4965_rt->rt_dbmnoise = noise;
/* Convert the channel frequency and set the flags */
put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
IEEE80211_CHAN_5GHZ),
&iwl4965_rt->rt_chbitmask);
else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
IEEE80211_CHAN_2GHZ),
&iwl4965_rt->rt_chbitmask);
else /* 802.11g */
put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
IEEE80211_CHAN_2GHZ),
&iwl4965_rt->rt_chbitmask);
if (rate == -1)
iwl4965_rt->rt_rate = 0;
else
iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
/*
* "antenna number"
*
* It seems that the antenna field in the phy flags value
* is actually a bitfield. This is undefined by radiotap,
* it wants an actual antenna number but I always get "7"
* for most legacy frames I receive indicating that the
* same frame was received on all three RX chains.
*
* I think this field should be removed in favour of a
* new 802.11n radiotap field "RX chains" that is defined
* as a bitmask.
*/
iwl4965_rt->rt_antenna =
le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
/* set the preamble flag if appropriate */
if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
stats->flag |= RX_FLAG_RADIOTAP;
}
static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
int include_phy,
struct iwl4965_rx_mem_buffer *rxb,
struct ieee80211_rx_status *stats)
{
struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
(struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
struct ieee80211_hdr *hdr;
u16 len;
__le32 *rx_end;
unsigned int skblen;
u32 ampdu_status;
if (!include_phy && priv->last_phy_res[0])
rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
if (!rx_start) {
IWL_ERROR("MPDU frame without a PHY data\n");
return;
}
if (include_phy) {
hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
rx_start->cfg_phy_cnt);
len = le16_to_cpu(rx_start->byte_count);
rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
sizeof(struct iwl4965_rx_phy_res) +
rx_start->cfg_phy_cnt + len);
} else {
struct iwl4965_rx_mpdu_res_start *amsdu =
(struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
hdr = (struct ieee80211_hdr *)(pkt->u.raw +
sizeof(struct iwl4965_rx_mpdu_res_start));
len = le16_to_cpu(amsdu->byte_count);
rx_start->byte_count = amsdu->byte_count;
rx_end = (__le32 *) (((u8 *) hdr) + len);
}
if (len > priv->hw_setting.max_pkt_size || len < 16) {
IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
return;
}
ampdu_status = le32_to_cpu(*rx_end);
skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
/* start from MAC */
skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
skb_put(rxb->skb, len); /* end where data ends */
/* We only process data packets if the interface is open */
if (unlikely(!priv->is_open)) {
IWL_DEBUG_DROP_LIMIT
("Dropping packet while interface is not open.\n");
return;
}
stats->flag = 0;
hdr = (struct ieee80211_hdr *)rxb->skb->data;
if (iwl4965_param_hwcrypto)
iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
if (priv->add_radiotap)
iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
priv->alloc_rxb_skb--;
rxb->skb = NULL;
#ifdef LED
priv->led_packets += len;
iwl4965_setup_activity_timer(priv);
#endif
}
/* Calc max signal level (dBm) among 3 possible receivers */
static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
{
/* data from PHY/DSP regarding signal strength, etc.,
* contents are always there, not configurable by host. */
struct iwl4965_rx_non_cfg_phy *ncphy =
(struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
>> IWL_AGC_DB_POS;
u32 valid_antennae =
(le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
>> RX_PHY_FLAGS_ANTENNAE_OFFSET;
u8 max_rssi = 0;
u32 i;
/* Find max rssi among 3 possible receivers.
* These values are measured by the digital signal processor (DSP).
* They should stay fairly constant even as the signal strength varies,
* if the radio's automatic gain control (AGC) is working right.
* AGC value (see below) will provide the "interesting" info. */
for (i = 0; i < 3; i++)
if (valid_antennae & (1 << i))
max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
max_rssi, agc);
/* dBm = max_rssi dB - agc dB - constant.
* Higher AGC (higher radio gain) means lower signal. */
return (max_rssi - agc - IWL_RSSI_OFFSET);
}
#ifdef CONFIG_IWL4965_HT
/* Parsed Information Elements */
struct ieee802_11_elems {
u8 *ds_params;
u8 ds_params_len;
u8 *tim;
u8 tim_len;
u8 *ibss_params;
u8 ibss_params_len;
u8 *erp_info;
u8 erp_info_len;
u8 *ht_cap_param;
u8 ht_cap_param_len;
u8 *ht_extra_param;
u8 ht_extra_param_len;
};
static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
{
size_t left = len;
u8 *pos = start;
int unknown = 0;
memset(elems, 0, sizeof(*elems));
while (left >= 2) {
u8 id, elen;
id = *pos++;
elen = *pos++;
left -= 2;
if (elen > left)
return -1;
switch (id) {
case WLAN_EID_DS_PARAMS:
elems->ds_params = pos;
elems->ds_params_len = elen;
break;
case WLAN_EID_TIM:
elems->tim = pos;
elems->tim_len = elen;
break;
case WLAN_EID_IBSS_PARAMS:
elems->ibss_params = pos;
elems->ibss_params_len = elen;
break;
case WLAN_EID_ERP_INFO:
elems->erp_info = pos;
elems->erp_info_len = elen;
break;
case WLAN_EID_HT_CAPABILITY:
elems->ht_cap_param = pos;
elems->ht_cap_param_len = elen;
break;
case WLAN_EID_HT_EXTRA_INFO:
elems->ht_extra_param = pos;
elems->ht_extra_param_len = elen;
break;
default:
unknown++;
break;
}
left -= elen;
pos += elen;
}
return 0;
}
void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
enum ieee80211_band band)
{
ht_info->cap = 0;
memset(ht_info->supp_mcs_set, 0, 16);
ht_info->ht_supported = 1;
if (band == IEEE80211_BAND_5GHZ) {
ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
ht_info->supp_mcs_set[4] = 0x01;
}
ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
(IWL_MIMO_PS_NONE << 2));
if (iwl4965_param_amsdu_size_8K) {
printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
}
ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
ht_info->supp_mcs_set[0] = 0xFF;
ht_info->supp_mcs_set[1] = 0xFF;
}
#endif /* CONFIG_IWL4965_HT */
static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
priv->stations[sta_id].sta.sta.modify_mask = 0;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
{
/* FIXME: need locking over ps_status ??? */
u8 sta_id = iwl4965_hw_find_station(priv, addr);
if (sta_id != IWL_INVALID_STATION) {
u8 sta_awake = priv->stations[sta_id].
ps_status == STA_PS_STATUS_WAKE;
if (sta_awake && ps_bit)
priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
else if (!sta_awake && !ps_bit) {
iwl4965_sta_modify_ps_wake(priv, sta_id);
priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
}
}
}
#ifdef CONFIG_IWL4965_DEBUG
/**
* iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
*
* You may hack this function to show different aspects of received frames,
* including selective frame dumps.
* group100 parameter selects whether to show 1 out of 100 good frames.
*
* TODO: This was originally written for 3945, need to audit for
* proper operation with 4965.
*/
static void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
struct iwl4965_rx_packet *pkt,
struct ieee80211_hdr *header, int group100)
{
u32 to_us;
u32 print_summary = 0;
u32 print_dump = 0; /* set to 1 to dump all frames' contents */
u32 hundred = 0;
u32 dataframe = 0;
u16 fc;
u16 seq_ctl;
u16 channel;
u16 phy_flags;
int rate_sym;
u16 length;
u16 status;
u16 bcn_tmr;
u32 tsf_low;
u64 tsf;
u8 rssi;
u8 agc;
u16 sig_avg;
u16 noise_diff;
struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
u8 *data = IWL_RX_DATA(pkt);
if (likely(!(iwl4965_debug_level & IWL_DL_RX)))
return;
/* MAC header */
fc = le16_to_cpu(header->frame_control);
seq_ctl = le16_to_cpu(header->seq_ctrl);
/* metadata */
channel = le16_to_cpu(rx_hdr->channel);
phy_flags = le16_to_cpu(rx_hdr->phy_flags);
rate_sym = rx_hdr->rate;
length = le16_to_cpu(rx_hdr->len);
/* end-of-frame status and timestamp */
status = le32_to_cpu(rx_end->status);
bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
tsf = le64_to_cpu(rx_end->timestamp);
/* signal statistics */
rssi = rx_stats->rssi;
agc = rx_stats->agc;
sig_avg = le16_to_cpu(rx_stats->sig_avg);
noise_diff = le16_to_cpu(rx_stats->noise_diff);
to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
/* if data frame is to us and all is good,
* (optionally) print summary for only 1 out of every 100 */
if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
dataframe = 1;
if (!group100)
print_summary = 1; /* print each frame */
else if (priv->framecnt_to_us < 100) {
priv->framecnt_to_us++;
print_summary = 0;
} else {
priv->framecnt_to_us = 0;
print_summary = 1;
hundred = 1;
}
} else {
/* print summary for all other frames */
print_summary = 1;
}
if (print_summary) {
char *title;
int rate_idx;
u32 bitrate;
if (hundred)
title = "100Frames";
else if (fc & IEEE80211_FCTL_RETRY)
title = "Retry";
else if (ieee80211_is_assoc_response(fc))
title = "AscRsp";
else if (ieee80211_is_reassoc_response(fc))
title = "RasRsp";
else if (ieee80211_is_probe_response(fc)) {
title = "PrbRsp";
print_dump = 1; /* dump frame contents */
} else if (ieee80211_is_beacon(fc)) {
title = "Beacon";
print_dump = 1; /* dump frame contents */
} else if (ieee80211_is_atim(fc))
title = "ATIM";
else if (ieee80211_is_auth(fc))
title = "Auth";
else if (ieee80211_is_deauth(fc))
title = "DeAuth";
else if (ieee80211_is_disassoc(fc))
title = "DisAssoc";
else
title = "Frame";
rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
if (unlikely(rate_idx == -1))
bitrate = 0;
else
bitrate = iwl4965_rates[rate_idx].ieee / 2;
/* print frame summary.
* MAC addresses show just the last byte (for brevity),
* but you can hack it to show more, if you'd like to. */
if (dataframe)
IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
"len=%u, rssi=%d, chnl=%d, rate=%u, \n",
title, fc, header->addr1[5],
length, rssi, channel, bitrate);
else {
/* src/dst addresses assume managed mode */
IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
"src=0x%02x, rssi=%u, tim=%lu usec, "
"phy=0x%02x, chnl=%d\n",
title, fc, header->addr1[5],
header->addr3[5], rssi,
tsf_low - priv->scan_start_tsf,
phy_flags, channel);
}
}
if (print_dump)
iwl4965_print_hex_dump(IWL_DL_RX, data, length);
}
#else
static inline void iwl4965_dbg_report_frame(struct iwl4965_priv *priv,
struct iwl4965_rx_packet *pkt,
struct ieee80211_hdr *header,
int group100)
{
}
#endif
#define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
/* Called for REPLY_4965_RX (legacy ABG frames), or
* REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct ieee80211_hdr *header;
struct ieee80211_rx_status rx_status;
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
/* Use phy data (Rx signal strength, etc.) contained within
* this rx packet for legacy frames,
* or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
(struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
(struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
__le32 *rx_end;
unsigned int len = 0;
u16 fc;
u8 network_packet;
rx_status.mactime = le64_to_cpu(rx_start->timestamp);
rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
le32_to_cpu(rx_start->rate_n_flags));
if (rx_status.band == IEEE80211_BAND_5GHZ)
rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
rx_status.antenna = 0;
rx_status.flag = 0;
if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP
("dsp size out of range [0,20]: "
"%d/n", rx_start->cfg_phy_cnt);
return;
}
if (!include_phy) {
if (priv->last_phy_res[0])
rx_start = (struct iwl4965_rx_phy_res *)
&priv->last_phy_res[1];
else
rx_start = NULL;
}
if (!rx_start) {
IWL_ERROR("MPDU frame without a PHY data\n");
return;
}
if (include_phy) {
header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
+ rx_start->cfg_phy_cnt);
len = le16_to_cpu(rx_start->byte_count);
rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
sizeof(struct iwl4965_rx_phy_res) + len);
} else {
struct iwl4965_rx_mpdu_res_start *amsdu =
(struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
header = (void *)(pkt->u.raw +
sizeof(struct iwl4965_rx_mpdu_res_start));
len = le16_to_cpu(amsdu->byte_count);
rx_end = (__le32 *) (pkt->u.raw +
sizeof(struct iwl4965_rx_mpdu_res_start) + len);
}
if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
!(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
le32_to_cpu(*rx_end));
return;
}
priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
/* Find max signal strength (dBm) among 3 antenna/receiver chains */
rx_status.ssi = iwl4965_calc_rssi(rx_start);
/* Meaningful noise values are available only from beacon statistics,
* which are gathered only when associated, and indicate noise
* only for the associated network channel ...
* Ignore these noise values while scanning (other channels) */
if (iwl4965_is_associated(priv) &&
!test_bit(STATUS_SCANNING, &priv->status)) {
rx_status.noise = priv->last_rx_noise;
rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
rx_status.noise);
} else {
rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
}
/* Reset beacon noise level if not associated. */
if (!iwl4965_is_associated(priv))
priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
/* Set "1" to report good data frames in groups of 100 */
/* FIXME: need to optimze the call: */
iwl4965_dbg_report_frame(priv, pkt, header, 1);
IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
rx_status.ssi, rx_status.noise, rx_status.signal,
rx_status.mactime);
network_packet = iwl4965_is_network_packet(priv, header);
if (network_packet) {
priv->last_rx_rssi = rx_status.ssi;
priv->last_beacon_time = priv->ucode_beacon_time;
priv->last_tsf = le64_to_cpu(rx_start->timestamp);
}
fc = le16_to_cpu(header->frame_control);
switch (fc & IEEE80211_FCTL_FTYPE) {
case IEEE80211_FTYPE_MGMT:
if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
header->addr2);
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_PROBE_RESP:
case IEEE80211_STYPE_BEACON:
if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
!compare_ether_addr(header->addr2, priv->bssid)) ||
(priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
!compare_ether_addr(header->addr3, priv->bssid))) {
struct ieee80211_mgmt *mgmt =
(struct ieee80211_mgmt *)header;
u64 timestamp =
le64_to_cpu(mgmt->u.beacon.timestamp);
priv->timestamp0 = timestamp & 0xFFFFFFFF;
priv->timestamp1 =
(timestamp >> 32) & 0xFFFFFFFF;
priv->beacon_int = le16_to_cpu(
mgmt->u.beacon.beacon_int);
if (priv->call_post_assoc_from_beacon &&
(priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
priv->call_post_assoc_from_beacon = 0;
queue_work(priv->workqueue,
&priv->post_associate.work);
}
}
break;
case IEEE80211_STYPE_ACTION:
break;
/*
* TODO: Use the new callback function from
* mac80211 instead of sniffing these packets.
*/
case IEEE80211_STYPE_ASSOC_RESP:
case IEEE80211_STYPE_REASSOC_RESP:
if (network_packet) {
#ifdef CONFIG_IWL4965_HT
u8 *pos = NULL;
struct ieee802_11_elems elems;
#endif /*CONFIG_IWL4965_HT */
struct ieee80211_mgmt *mgnt =
(struct ieee80211_mgmt *)header;
/* We have just associated, give some
* time for the 4-way handshake if
* any. Don't start scan too early. */
priv->next_scan_jiffies = jiffies +
IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
priv->assoc_id = (~((1 << 15) | (1 << 14))
& le16_to_cpu(mgnt->u.assoc_resp.aid));
priv->assoc_capability =
le16_to_cpu(
mgnt->u.assoc_resp.capab_info);
#ifdef CONFIG_IWL4965_HT
pos = mgnt->u.assoc_resp.variable;
if (!parse_elems(pos,
len - (pos - (u8 *) mgnt),
&elems)) {
if (elems.ht_extra_param &&
elems.ht_cap_param)
break;
}
#endif /*CONFIG_IWL4965_HT */
/* assoc_id is 0 no association */
if (!priv->assoc_id)
break;
if (priv->beacon_int)
queue_work(priv->workqueue,
&priv->post_associate.work);
else
priv->call_post_assoc_from_beacon = 1;
}
break;
case IEEE80211_STYPE_PROBE_REQ:
if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
!iwl4965_is_associated(priv)) {
DECLARE_MAC_BUF(mac1);
DECLARE_MAC_BUF(mac2);
DECLARE_MAC_BUF(mac3);
IWL_DEBUG_DROP("Dropping (non network): "
"%s, %s, %s\n",
print_mac(mac1, header->addr1),
print_mac(mac2, header->addr2),
print_mac(mac3, header->addr3));
return;
}
}
iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
break;
case IEEE80211_FTYPE_CTL:
#ifdef CONFIG_IWL4965_HT
switch (fc & IEEE80211_FCTL_STYPE) {
case IEEE80211_STYPE_BACK_REQ:
IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
iwl4965_handle_data_packet(priv, 0, include_phy,
rxb, &rx_status);
break;
default:
break;
}
#endif
break;
case IEEE80211_FTYPE_DATA: {
DECLARE_MAC_BUF(mac1);
DECLARE_MAC_BUF(mac2);
DECLARE_MAC_BUF(mac3);
if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
header->addr2);
if (unlikely(!network_packet))
IWL_DEBUG_DROP("Dropping (non network): "
"%s, %s, %s\n",
print_mac(mac1, header->addr1),
print_mac(mac2, header->addr2),
print_mac(mac3, header->addr3));
else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
print_mac(mac1, header->addr1),
print_mac(mac2, header->addr2),
print_mac(mac3, header->addr3));
else
iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
&rx_status);
break;
}
default:
break;
}
}
/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
* This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
priv->last_phy_res[0] = 1;
memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
sizeof(struct iwl4965_rx_phy_res));
}
static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
#ifdef CONFIG_IWL4965_SENSITIVITY
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
le32_to_cpu(missed_beacon->consequtive_missed_beacons),
le32_to_cpu(missed_beacon->total_missed_becons),
le32_to_cpu(missed_beacon->num_recvd_beacons),
le32_to_cpu(missed_beacon->num_expected_beacons));
priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
queue_work(priv->workqueue, &priv->sensitivity_work);
}
#endif /*CONFIG_IWL4965_SENSITIVITY*/
}
#ifdef CONFIG_IWL4965_HT
/**
* iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
*/
static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
int sta_id, int tid)
{
unsigned long flags;
/* Remove "disable" flag, to enable Tx for this TID */
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
/**
* iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
*
* Go through block-ack's bitmap of ACK'd frames, update driver's record of
* ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
*/
static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
struct iwl4965_ht_agg *agg,
struct iwl4965_compressed_ba_resp*
ba_resp)
{
int i, sh, ack;
u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
u64 bitmap;
int successes = 0;
struct ieee80211_tx_status *tx_status;
if (unlikely(!agg->wait_for_ba)) {
IWL_ERROR("Received BA when not expected\n");
return -EINVAL;
}
/* Mark that the expected block-ack response arrived */
agg->wait_for_ba = 0;
IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
/* Calculate shift to align block-ack bits with our Tx window bits */
sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
if (sh < 0) /* tbw something is wrong with indices */
sh += 0x100;
/* don't use 64-bit values for now */
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
if (agg->frame_count > (64 - sh)) {
IWL_DEBUG_TX_REPLY("more frames than bitmap size");
return -1;
}
/* check for success or failure according to the
* transmitted bitmap and block-ack bitmap */
bitmap &= agg->bitmap;
/* For each frame attempted in aggregation,
* update driver's record of tx frame's status. */
for (i = 0; i < agg->frame_count ; i++) {
ack = bitmap & (1 << i);
successes += !!ack;
IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
agg->start_idx + i);
}
tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
tx_status->flags = IEEE80211_TX_STATUS_ACK;
tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
tx_status->ampdu_ack_map = successes;
tx_status->ampdu_ack_len = agg->frame_count;
/* FIXME Wrong rate
tx_status->control.tx_rate = agg->rate_n_flags;
*/
IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
return 0;
}
/**
* iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
u16 txq_id)
{
/* Simply stop the queue, but don't change any configuration;
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
iwl4965_write_prph(priv,
KDR_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
(1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
}
/**
* txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
*/
static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
u16 ssn_idx, u8 tx_fifo)
{
if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
IWL_WARNING("queue number too small: %d, must be > %d\n",
txq_id, IWL_BACK_QUEUE_FIRST_ID);
return -EINVAL;
}
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
iwl4965_txq_ctx_deactivate(priv, txq_id);
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
return 0;
}
int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
u8 tid, int txq_id)
{
struct iwl4965_queue *q = &priv->txq[txq_id].q;
u8 *addr = priv->stations[sta_id].sta.sta.addr;
struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
switch (priv->stations[sta_id].tid[tid].agg.state) {
case IWL_EMPTYING_HW_QUEUE_DELBA:
/* We are reclaiming the last packet of the */
/* aggregated HW queue */
if (txq_id == tid_data->agg.txq_id &&
q->read_ptr == q->write_ptr) {
u16 ssn = SEQ_TO_SN(tid_data->seq_number);
int tx_fifo = default_tid_to_tx_fifo[tid];
IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
iwl4965_tx_queue_agg_disable(priv, txq_id,
ssn, tx_fifo);
tid_data->agg.state = IWL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
}
break;
case IWL_EMPTYING_HW_QUEUE_ADDBA:
/* We are reclaiming the last packet of the queue */
if (tid_data->tfds_in_queue == 0) {
IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
tid_data->agg.state = IWL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
}
break;
}
return 0;
}
/**
* iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
* @index -- current index
* @n_bd -- total number of entries in queue (s/b power of 2)
*/
static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
{
return (index == 0) ? n_bd - 1 : index - 1;
}
/**
* iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
*
* Handles block-acknowledge notification from device, which reports success
* of frames sent via aggregation.
*/
static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
struct iwl4965_rx_mem_buffer *rxb)
{
struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
int index;
struct iwl4965_tx_queue *txq = NULL;
struct iwl4965_ht_agg *agg;
DECLARE_MAC_BUF(mac);
/* "flow" corresponds to Tx queue */
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
/* "ssn" is start of block-ack Tx window, corresponds to index
* (in Tx queue's circular buffer) of first TFD/frame in window */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
if (scd_flow >= ARRAY_SIZE(priv->txq)) {
IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
return;
}
txq = &priv->txq[scd_flow];
agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
/* Find index just before block-ack window */
index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
/* TODO: Need to get this copy more safely - now good for debug */
IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
"sta_id = %d\n",
agg->wait_for_ba,
print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
ba_resp->sta_id);
IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
"%d, scd_ssn = %d\n",
ba_resp->tid,
ba_resp->seq_ctl,
ba_resp->bitmap,
ba_resp->scd_flow,
ba_resp->scd_ssn);
IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
agg->start_idx,
agg->bitmap);
/* Update driver's record of ACK vs. not for each frame in window */
iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
/* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack window (we assume that they've been successfully
* transmitted ... if not, it's too late anyway). */
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
priv->stations[ba_resp->sta_id].
tid[ba_resp->tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
priv->mac80211_registered &&
agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
ieee80211_wake_queue(priv->hw, scd_flow);
iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
ba_resp->tid, scd_flow);
}
}
/**
* iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
*/
static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
u16 txq_id)
{
u32 tbl_dw_addr;
u32 tbl_dw;
u16 scd_q2ratid;
scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
tbl_dw_addr = priv->scd_base_addr +
SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
if (txq_id & 0x1)
tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
else
tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
return 0;
}
/**
* iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
*
* NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
* i.e. it must be one of the higher queues used for aggregation
*/
static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
int tx_fifo, int sta_id, int tid,
u16 ssn_idx)
{
unsigned long flags;
int rc;
u16 ra_tid;
if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
IWL_WARNING("queue number too small: %d, must be > %d\n",
txq_id, IWL_BACK_QUEUE_FIRST_ID);
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
/* Stop this Tx queue before configuring it */
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
/* Map receiver-address / traffic-ID to this queue */
iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
/* Set this queue as a chain-building queue */
iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
/* Place first TFD at index corresponding to start sequence number.
* Assumes that ssn_idx is valid (!= 0xFFF) */
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
/* Set up Tx window size and frame limit for this queue */
iwl4965_write_targ_mem(priv,
priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
(SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
iwl4965_write_targ_mem(priv, priv->scd_base_addr +
SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
(SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
& SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
#endif /* CONFIG_IWL4965_HT */
/**
* iwl4965_add_station - Initialize a station's hardware rate table
*
* The uCode's station table contains a table of fallback rates
* for automatic fallback during transmission.
*
* NOTE: This sets up a default set of values. These will be replaced later
* if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
* rc80211_simple.
*
* NOTE: Run REPLY_ADD_STA command to set up station table entry, before
* calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
* which requires station table entry to exist).
*/
void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
{
int i, r;
struct iwl4965_link_quality_cmd link_cmd = {
.reserved1 = 0,
};
u16 rate_flags;
/* Set up the rate scaling to start at selected rate, fall back
* all the way down to 1M in IEEE order, and then spin on 1M */
if (is_ap)
r = IWL_RATE_54M_INDEX;
else if (priv->band == IEEE80211_BAND_5GHZ)
r = IWL_RATE_6M_INDEX;
else
r = IWL_RATE_1M_INDEX;
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
rate_flags = 0;
if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
/* Use Tx antenna B only */
rate_flags |= RATE_MCS_ANT_B_MSK;
rate_flags &= ~RATE_MCS_ANT_A_MSK;
link_cmd.rs_table[i].rate_n_flags =
iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
r = iwl4965_get_prev_ieee_rate(r);
}
link_cmd.general_params.single_stream_ant_msk = 2;
link_cmd.general_params.dual_stream_ant_msk = 3;
link_cmd.agg_params.agg_dis_start_th = 3;
link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
/* Update the rate scaling for control frame Tx to AP */
link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
&link_cmd);
}
#ifdef CONFIG_IWL4965_HT
static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv,
enum ieee80211_band band,
u16 channel, u8 extension_chan_offset)
{
const struct iwl4965_channel_info *ch_info;
ch_info = iwl4965_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info))
return 0;
if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
return 0;
if ((ch_info->fat_extension_channel == extension_chan_offset) ||
(ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
return 1;
return 0;
}
static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
struct ieee80211_ht_info *sta_ht_inf)
{
struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
if ((!iwl_ht_conf->is_ht) ||
(iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
(iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
return 0;
if (sta_ht_inf) {
if ((!sta_ht_inf->ht_supported) ||
(!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
return 0;
}
return (iwl4965_is_channel_extension(priv, priv->band,
iwl_ht_conf->control_channel,
iwl_ht_conf->extension_chan_offset));
}
void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
{
struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
u32 val;
if (!ht_info->is_ht)
return;
/* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
if (iwl4965_is_fat_tx_allowed(priv, NULL))
rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
else
rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
IWL_DEBUG_ASSOC("control diff than current %d %d\n",
le16_to_cpu(rxon->channel),
ht_info->control_channel);
rxon->channel = cpu_to_le16(ht_info->control_channel);
return;
}
/* Note: control channel is opposite of extension channel */
switch (ht_info->extension_chan_offset) {
case IWL_EXT_CHANNEL_OFFSET_ABOVE:
rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
break;
case IWL_EXT_CHANNEL_OFFSET_BELOW:
rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
break;
case IWL_EXT_CHANNEL_OFFSET_AUTO:
rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
break;
default:
rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
break;
}
val = ht_info->ht_protection;
rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
iwl4965_set_rxon_chain(priv);
IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
"rxon flags 0x%X operation mode :0x%X "
"extension channel offset 0x%x "
"control chan %d\n",
ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
le32_to_cpu(rxon->flags), ht_info->ht_protection,
ht_info->extension_chan_offset,
ht_info->control_channel);
return;
}
void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
struct ieee80211_ht_info *sta_ht_inf)
{
__le32 sta_flags;
u8 mimo_ps_mode;
if (!sta_ht_inf || !sta_ht_inf->ht_supported)
goto done;
mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
sta_flags = priv->stations[index].sta.station_flags;
sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
switch (mimo_ps_mode) {
case WLAN_HT_CAP_MIMO_PS_STATIC:
sta_flags |= STA_FLG_MIMO_DIS_MSK;
break;
case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
break;
case WLAN_HT_CAP_MIMO_PS_DISABLED:
break;
default:
IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
break;
}
sta_flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
sta_flags |= cpu_to_le32(
(u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
sta_flags |= STA_FLG_FAT_EN_MSK;
else
sta_flags &= ~STA_FLG_FAT_EN_MSK;
priv->stations[index].sta.station_flags = sta_flags;
done:
return;
}
static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
int sta_id, int tid, u16 ssn)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
int sta_id, int tid)
{
unsigned long flags;
spin_lock_irqsave(&priv->sta_lock, flags);
priv->stations[sta_id].sta.station_flags_msk = 0;
priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
spin_unlock_irqrestore(&priv->sta_lock, flags);
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
/*
* Find first available (lowest unused) Tx Queue, mark it "active".
* Called only when finding queue for aggregation.
* Should never return anything < 7, because they should already
* be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
*/
static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
{
int txq_id;
for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
return txq_id;
return -1;
}
static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
u16 tid, u16 *start_seq_num)
{
struct iwl4965_priv *priv = hw->priv;
int sta_id;
int tx_fifo;
int txq_id;
int ssn = -1;
int rc = 0;
unsigned long flags;
struct iwl4965_tid_data *tid_data;
DECLARE_MAC_BUF(mac);
if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
tx_fifo = default_tid_to_tx_fifo[tid];
else
return -EINVAL;
IWL_WARNING("%s on da = %s tid = %d\n",
__func__, print_mac(mac, da), tid);
sta_id = iwl4965_hw_find_station(priv, da);
if (sta_id == IWL_INVALID_STATION)
return -ENXIO;
if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
return -ENXIO;
}
txq_id = iwl4965_txq_ctx_activate_free(priv);
if (txq_id == -1)
return -ENXIO;
spin_lock_irqsave(&priv->sta_lock, flags);
tid_data = &priv->stations[sta_id].tid[tid];
ssn = SEQ_TO_SN(tid_data->seq_number);
tid_data->agg.txq_id = txq_id;
spin_unlock_irqrestore(&priv->sta_lock, flags);
*start_seq_num = ssn;
rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
sta_id, tid, ssn);
if (rc)
return rc;
rc = 0;
if (tid_data->tfds_in_queue == 0) {
printk(KERN_ERR "HW queue is empty\n");
tid_data->agg.state = IWL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
} else {
IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
tid_data->tfds_in_queue);
tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
return rc;
}
static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
u16 tid)
{
struct iwl4965_priv *priv = hw->priv;
int tx_fifo_id, txq_id, sta_id, ssn = -1;
struct iwl4965_tid_data *tid_data;
int rc, write_ptr, read_ptr;
unsigned long flags;
DECLARE_MAC_BUF(mac);
if (!da) {
IWL_ERROR("da = NULL\n");
return -EINVAL;
}
if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
tx_fifo_id = default_tid_to_tx_fifo[tid];
else
return -EINVAL;
sta_id = iwl4965_hw_find_station(priv, da);
if (sta_id == IWL_INVALID_STATION)
return -ENXIO;
if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
tid_data = &priv->stations[sta_id].tid[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
txq_id = tid_data->agg.txq_id;
write_ptr = priv->txq[txq_id].q.write_ptr;
read_ptr = priv->txq[txq_id].q.read_ptr;
/* The queue is not empty */
if (write_ptr != read_ptr) {
IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
priv->stations[sta_id].tid[tid].agg.state =
IWL_EMPTYING_HW_QUEUE_DELBA;
return 0;
}
IWL_DEBUG_HT("HW queue empty\n");;
priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
if (rc)
return rc;
ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
print_mac(mac, da), tid);
return 0;
}
int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
enum ieee80211_ampdu_mlme_action action,
const u8 *addr, u16 tid, u16 *ssn)
{
struct iwl4965_priv *priv = hw->priv;
int sta_id;
DECLARE_MAC_BUF(mac);
IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
print_mac(mac, addr), tid);
sta_id = iwl4965_hw_find_station(priv, addr);
switch (action) {
case IEEE80211_AMPDU_RX_START:
IWL_DEBUG_HT("start Rx\n");
iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
break;
case IEEE80211_AMPDU_RX_STOP:
IWL_DEBUG_HT("stop Rx\n");
iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
break;
case IEEE80211_AMPDU_TX_START:
IWL_DEBUG_HT("start Tx\n");
return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
case IEEE80211_AMPDU_TX_STOP:
IWL_DEBUG_HT("stop Tx\n");
return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
default:
IWL_DEBUG_HT("unknown\n");
return -EINVAL;
break;
}
return 0;
}
#endif /* CONFIG_IWL4965_HT */
/* Set up 4965-specific Rx frame reply handlers */
void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
{
/* Legacy Rx frames */
priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
/* High-throughput (HT) Rx frames */
priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
iwl4965_rx_missed_beacon_notif;
#ifdef CONFIG_IWL4965_HT
priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
#endif /* CONFIG_IWL4965_HT */
}
void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
{
INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
#ifdef CONFIG_IWL4965_SENSITIVITY
INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
#endif
init_timer(&priv->statistics_periodic);
priv->statistics_periodic.data = (unsigned long)priv;
priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
}
void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
{
del_timer_sync(&priv->statistics_periodic);
cancel_delayed_work(&priv->init_alive_start);
}
struct pci_device_id iwl4965_hw_card_ids[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
{0}
};
/*
* The device's EEPROM semaphore prevents conflicts between driver and uCode
* when accessing the EEPROM; each access is a series of pulses to/from the
* EEPROM chip, not a single event, so even reads could conflict if they
* weren't arbitrated by the semaphore.
*/
int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
{
u16 count;
int rc;
for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
/* Request semaphore */
iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
/* See if we got it */
rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
EEPROM_SEM_TIMEOUT);
if (rc >= 0) {
IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
count+1);
return rc;
}
}
return rc;
}
MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
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