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linux-zen-server/drivers/net/wireless/intel/iwlegacy/4965-mac.c

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2023-08-30 17:53:23 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
*
* Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project, as well
* as portions of the ieee80211 subsystem header files.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/units.h>
#include <net/mac80211.h>
#include <asm/div64.h>
#define DRV_NAME "iwl4965"
#include "common.h"
#include "4965.h"
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
#ifdef CONFIG_IWLEGACY_DEBUG
#define VD "d"
#else
#define VD
#endif
#define DRV_VERSION IWLWIFI_VERSION VD
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_ALIAS("iwl4965");
void
il4965_check_abort_status(struct il_priv *il, u8 frame_count, u32 status)
{
if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
IL_ERR("Tx flush command to flush out all frames\n");
if (!test_bit(S_EXIT_PENDING, &il->status))
queue_work(il->workqueue, &il->tx_flush);
}
}
/*
* EEPROM
*/
struct il_mod_params il4965_mod_params = {
.restart_fw = 1,
/* the rest are 0 by default */
};
void
il4965_rx_queue_reset(struct il_priv *il, struct il_rx_queue *rxq)
{
unsigned long flags;
int i;
spin_lock_irqsave(&rxq->lock, flags);
INIT_LIST_HEAD(&rxq->rx_free);
INIT_LIST_HEAD(&rxq->rx_used);
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
/* In the reset function, these buffers may have been allocated
* to an SKB, so we need to unmap and free potential storage */
if (rxq->pool[i].page != NULL) {
dma_unmap_page(&il->pci_dev->dev,
rxq->pool[i].page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__il_free_pages(il, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
}
for (i = 0; i < RX_QUEUE_SIZE; i++)
rxq->queue[i] = NULL;
/* Set us so that we have processed and used all buffers, but have
* not restocked the Rx queue with fresh buffers */
rxq->read = rxq->write = 0;
rxq->write_actual = 0;
rxq->free_count = 0;
spin_unlock_irqrestore(&rxq->lock, flags);
}
int
il4965_rx_init(struct il_priv *il, struct il_rx_queue *rxq)
{
u32 rb_size;
const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
u32 rb_timeout = 0;
if (il->cfg->mod_params->amsdu_size_8K)
rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
else
rb_size = FH49_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
/* Stop Rx DMA */
il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
/* Reset driver's Rx queue write idx */
il_wr(il, FH49_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
/* Tell device where to find RBD circular buffer in DRAM */
il_wr(il, FH49_RSCSR_CHNL0_RBDCB_BASE_REG, (u32) (rxq->bd_dma >> 8));
/* Tell device where in DRAM to update its Rx status */
il_wr(il, FH49_RSCSR_CHNL0_STTS_WPTR_REG, rxq->rb_stts_dma >> 4);
/* Enable Rx DMA
* Direct rx interrupts to hosts
* Rx buffer size 4 or 8k
* RB timeout 0x10
* 256 RBDs
*/
il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG,
FH49_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
FH49_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
FH49_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK |
rb_size |
(rb_timeout << FH49_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS) |
(rfdnlog << FH49_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
/* Set interrupt coalescing timer to default (2048 usecs) */
il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_TIMEOUT_DEF);
return 0;
}
static void
il4965_set_pwr_vmain(struct il_priv *il)
{
/*
* (for documentation purposes)
* to set power to V_AUX, do:
if (pci_pme_capable(il->pci_dev, PCI_D3cold))
il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
~APMG_PS_CTRL_MSK_PWR_SRC);
*/
il_set_bits_mask_prph(il, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
~APMG_PS_CTRL_MSK_PWR_SRC);
}
int
il4965_hw_nic_init(struct il_priv *il)
{
unsigned long flags;
struct il_rx_queue *rxq = &il->rxq;
int ret;
spin_lock_irqsave(&il->lock, flags);
il_apm_init(il);
/* Set interrupt coalescing calibration timer to default (512 usecs) */
il_write8(il, CSR_INT_COALESCING, IL_HOST_INT_CALIB_TIMEOUT_DEF);
spin_unlock_irqrestore(&il->lock, flags);
il4965_set_pwr_vmain(il);
il4965_nic_config(il);
/* Allocate the RX queue, or reset if it is already allocated */
if (!rxq->bd) {
ret = il_rx_queue_alloc(il);
if (ret) {
IL_ERR("Unable to initialize Rx queue\n");
return -ENOMEM;
}
} else
il4965_rx_queue_reset(il, rxq);
il4965_rx_replenish(il);
il4965_rx_init(il, rxq);
spin_lock_irqsave(&il->lock, flags);
rxq->need_update = 1;
il_rx_queue_update_write_ptr(il, rxq);
spin_unlock_irqrestore(&il->lock, flags);
/* Allocate or reset and init all Tx and Command queues */
if (!il->txq) {
ret = il4965_txq_ctx_alloc(il);
if (ret)
return ret;
} else
il4965_txq_ctx_reset(il);
set_bit(S_INIT, &il->status);
return 0;
}
/*
* il4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
*/
static inline __le32
il4965_dma_addr2rbd_ptr(struct il_priv *il, dma_addr_t dma_addr)
{
return cpu_to_le32((u32) (dma_addr >> 8));
}
/*
* il4965_rx_queue_restock - refill RX queue from pre-allocated pool
*
* If there are slots in the RX queue that need to be restocked,
* and we have free pre-allocated buffers, fill the ranks as much
* as we can, pulling from rx_free.
*
* This moves the 'write' idx forward to catch up with 'processed', and
* also updates the memory address in the firmware to reference the new
* target buffer.
*/
void
il4965_rx_queue_restock(struct il_priv *il)
{
struct il_rx_queue *rxq = &il->rxq;
struct list_head *element;
struct il_rx_buf *rxb;
unsigned long flags;
spin_lock_irqsave(&rxq->lock, flags);
while (il_rx_queue_space(rxq) > 0 && rxq->free_count) {
/* The overwritten rxb must be a used one */
rxb = rxq->queue[rxq->write];
BUG_ON(rxb && rxb->page);
/* Get next free Rx buffer, remove from free list */
element = rxq->rx_free.next;
rxb = list_entry(element, struct il_rx_buf, list);
list_del(element);
/* Point to Rx buffer via next RBD in circular buffer */
rxq->bd[rxq->write] =
il4965_dma_addr2rbd_ptr(il, rxb->page_dma);
rxq->queue[rxq->write] = rxb;
rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
rxq->free_count--;
}
spin_unlock_irqrestore(&rxq->lock, flags);
/* If the pre-allocated buffer pool is dropping low, schedule to
* refill it */
if (rxq->free_count <= RX_LOW_WATERMARK)
queue_work(il->workqueue, &il->rx_replenish);
/* If we've added more space for the firmware to place data, tell it.
* Increment device's write pointer in multiples of 8. */
if (rxq->write_actual != (rxq->write & ~0x7)) {
spin_lock_irqsave(&rxq->lock, flags);
rxq->need_update = 1;
spin_unlock_irqrestore(&rxq->lock, flags);
il_rx_queue_update_write_ptr(il, rxq);
}
}
/*
* il4965_rx_replenish - Move all used packet from rx_used to rx_free
*
* When moving to rx_free an SKB is allocated for the slot.
*
* Also restock the Rx queue via il_rx_queue_restock.
* This is called as a scheduled work item (except for during initialization)
*/
static void
il4965_rx_allocate(struct il_priv *il, gfp_t priority)
{
struct il_rx_queue *rxq = &il->rxq;
struct list_head *element;
struct il_rx_buf *rxb;
struct page *page;
dma_addr_t page_dma;
unsigned long flags;
gfp_t gfp_mask = priority;
while (1) {
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
return;
}
spin_unlock_irqrestore(&rxq->lock, flags);
if (rxq->free_count > RX_LOW_WATERMARK)
gfp_mask |= __GFP_NOWARN;
if (il->hw_params.rx_page_order > 0)
gfp_mask |= __GFP_COMP;
/* Alloc a new receive buffer */
page = alloc_pages(gfp_mask, il->hw_params.rx_page_order);
if (!page) {
if (net_ratelimit())
D_INFO("alloc_pages failed, " "order: %d\n",
il->hw_params.rx_page_order);
if (rxq->free_count <= RX_LOW_WATERMARK &&
net_ratelimit())
IL_ERR("Failed to alloc_pages with %s. "
"Only %u free buffers remaining.\n",
priority ==
GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL",
rxq->free_count);
/* We don't reschedule replenish work here -- we will
* call the restock method and if it still needs
* more buffers it will schedule replenish */
return;
}
/* Get physical address of the RB */
page_dma = dma_map_page(&il->pci_dev->dev, page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(&il->pci_dev->dev, page_dma))) {
__free_pages(page, il->hw_params.rx_page_order);
break;
}
spin_lock_irqsave(&rxq->lock, flags);
if (list_empty(&rxq->rx_used)) {
spin_unlock_irqrestore(&rxq->lock, flags);
dma_unmap_page(&il->pci_dev->dev, page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__free_pages(page, il->hw_params.rx_page_order);
return;
}
element = rxq->rx_used.next;
rxb = list_entry(element, struct il_rx_buf, list);
list_del(element);
BUG_ON(rxb->page);
rxb->page = page;
rxb->page_dma = page_dma;
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
il->alloc_rxb_page++;
spin_unlock_irqrestore(&rxq->lock, flags);
}
}
void
il4965_rx_replenish(struct il_priv *il)
{
unsigned long flags;
il4965_rx_allocate(il, GFP_KERNEL);
spin_lock_irqsave(&il->lock, flags);
il4965_rx_queue_restock(il);
spin_unlock_irqrestore(&il->lock, flags);
}
void
il4965_rx_replenish_now(struct il_priv *il)
{
il4965_rx_allocate(il, GFP_ATOMIC);
il4965_rx_queue_restock(il);
}
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
* If an SKB has been detached, the POOL needs to have its SKB set to NULL
* This free routine walks the list of POOL entries and if SKB is set to
* non NULL it is unmapped and freed
*/
void
il4965_rx_queue_free(struct il_priv *il, struct il_rx_queue *rxq)
{
int i;
for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
if (rxq->pool[i].page != NULL) {
dma_unmap_page(&il->pci_dev->dev,
rxq->pool[i].page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__il_free_pages(il, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
}
dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
rxq->bd_dma);
dma_free_coherent(&il->pci_dev->dev, sizeof(struct il_rb_status),
rxq->rb_stts, rxq->rb_stts_dma);
rxq->bd = NULL;
rxq->rb_stts = NULL;
}
int
il4965_rxq_stop(struct il_priv *il)
{
int ret;
_il_wr(il, FH49_MEM_RCSR_CHNL0_CONFIG_REG, 0);
ret = _il_poll_bit(il, FH49_MEM_RSSR_RX_STATUS_REG,
FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
FH49_RSSR_CHNL0_RX_STATUS_CHNL_IDLE,
1000);
if (ret < 0)
IL_ERR("Can't stop Rx DMA.\n");
return 0;
}
int
il4965_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
{
int idx = 0;
int band_offset = 0;
/* HT rate format: mac80211 wants an MCS number, which is just LSB */
if (rate_n_flags & RATE_MCS_HT_MSK) {
idx = (rate_n_flags & 0xff);
return idx;
/* Legacy rate format, search for match in table */
} else {
if (band == NL80211_BAND_5GHZ)
band_offset = IL_FIRST_OFDM_RATE;
for (idx = band_offset; idx < RATE_COUNT_LEGACY; idx++)
if (il_rates[idx].plcp == (rate_n_flags & 0xFF))
return idx - band_offset;
}
return -1;
}
static int
il4965_calc_rssi(struct il_priv *il, struct il_rx_phy_res *rx_resp)
{
/* data from PHY/DSP regarding signal strength, etc.,
* contents are always there, not configurable by host. */
struct il4965_rx_non_cfg_phy *ncphy =
(struct il4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
u32 agc =
(le16_to_cpu(ncphy->agc_info) & IL49_AGC_DB_MASK) >>
IL49_AGC_DB_POS;
u32 valid_antennae =
(le16_to_cpu(rx_resp->phy_flags) & IL49_RX_PHY_FLAGS_ANTENNAE_MASK)
>> IL49_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);
D_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 - IL4965_RSSI_OFFSET;
}
static u32
il4965_translate_rx_status(struct il_priv *il, u32 decrypt_in)
{
u32 decrypt_out = 0;
if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
RX_RES_STATUS_STATION_FOUND)
decrypt_out |=
(RX_RES_STATUS_STATION_FOUND |
RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
/* packet was not encrypted */
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
RX_RES_STATUS_SEC_TYPE_NONE)
return decrypt_out;
/* packet was encrypted with unknown alg */
if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
RX_RES_STATUS_SEC_TYPE_ERR)
return decrypt_out;
/* decryption was not done in HW */
if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
RX_MPDU_RES_STATUS_DEC_DONE_MSK)
return decrypt_out;
switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
case RX_RES_STATUS_SEC_TYPE_CCMP:
/* alg is CCM: check MIC only */
if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
/* Bad MIC */
decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
else
decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
break;
case RX_RES_STATUS_SEC_TYPE_TKIP:
if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
/* Bad TTAK */
decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
break;
}
fallthrough; /* if TTAK OK */
default:
if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
else
decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
break;
}
D_RX("decrypt_in:0x%x decrypt_out = 0x%x\n", decrypt_in, decrypt_out);
return decrypt_out;
}
#define SMALL_PACKET_SIZE 256
static void
il4965_pass_packet_to_mac80211(struct il_priv *il, struct ieee80211_hdr *hdr,
u32 len, u32 ampdu_status, struct il_rx_buf *rxb,
struct ieee80211_rx_status *stats)
{
struct sk_buff *skb;
__le16 fc = hdr->frame_control;
/* We only process data packets if the interface is open */
if (unlikely(!il->is_open)) {
D_DROP("Dropping packet while interface is not open.\n");
return;
}
if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
D_INFO("Woke queues - frame received on passive channel\n");
}
/* In case of HW accelerated crypto and bad decryption, drop */
if (!il->cfg->mod_params->sw_crypto &&
il_set_decrypted_flag(il, hdr, ampdu_status, stats))
return;
skb = dev_alloc_skb(SMALL_PACKET_SIZE);
if (!skb) {
IL_ERR("dev_alloc_skb failed\n");
return;
}
if (len <= SMALL_PACKET_SIZE) {
skb_put_data(skb, hdr, len);
} else {
skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb),
len, PAGE_SIZE << il->hw_params.rx_page_order);
il->alloc_rxb_page--;
rxb->page = NULL;
}
il_update_stats(il, false, fc, len);
memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
ieee80211_rx(il->hw, skb);
}
/* Called for N_RX (legacy ABG frames), or
* N_RX_MPDU (HT high-throughput N frames). */
static void
il4965_hdl_rx(struct il_priv *il, struct il_rx_buf *rxb)
{
struct ieee80211_hdr *header;
struct ieee80211_rx_status rx_status = {};
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_rx_phy_res *phy_res;
__le32 rx_pkt_status;
struct il_rx_mpdu_res_start *amsdu;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
/**
* N_RX and N_RX_MPDU are handled differently.
* N_RX: physical layer info is in this buffer
* N_RX_MPDU: physical layer info was sent in separate
* command and cached in il->last_phy_res
*
* Here we set up local variables depending on which command is
* received.
*/
if (pkt->hdr.cmd == N_RX) {
phy_res = (struct il_rx_phy_res *)pkt->u.raw;
header =
(struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) +
phy_res->cfg_phy_cnt);
len = le16_to_cpu(phy_res->byte_count);
rx_pkt_status =
*(__le32 *) (pkt->u.raw + sizeof(*phy_res) +
phy_res->cfg_phy_cnt + len);
ampdu_status = le32_to_cpu(rx_pkt_status);
} else {
if (!il->_4965.last_phy_res_valid) {
IL_ERR("MPDU frame without cached PHY data\n");
return;
}
phy_res = &il->_4965.last_phy_res;
amsdu = (struct il_rx_mpdu_res_start *)pkt->u.raw;
header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
len = le16_to_cpu(amsdu->byte_count);
rx_pkt_status = *(__le32 *) (pkt->u.raw + sizeof(*amsdu) + len);
ampdu_status =
il4965_translate_rx_status(il, le32_to_cpu(rx_pkt_status));
}
if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
D_DROP("dsp size out of range [0,20]: %d\n",
phy_res->cfg_phy_cnt);
return;
}
if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
!(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
D_RX("Bad CRC or FIFO: 0x%08X.\n", le32_to_cpu(rx_pkt_status));
return;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
rx_status.mactime = le64_to_cpu(phy_res->timestamp);
rx_status.band =
(phy_res->
phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? NL80211_BAND_2GHZ :
NL80211_BAND_5GHZ;
rx_status.freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
rx_status.band);
rx_status.rate_idx =
il4965_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
rx_status.flag = 0;
/* TSF isn't reliable. In order to allow smooth user experience,
* this W/A doesn't propagate it to the mac80211 */
/*rx_status.flag |= RX_FLAG_MACTIME_START; */
il->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
/* Find max signal strength (dBm) among 3 antenna/receiver chains */
rx_status.signal = il4965_calc_rssi(il, phy_res);
D_STATS("Rssi %d, TSF %llu\n", rx_status.signal,
(unsigned long long)rx_status.mactime);
/*
* "antenna number"
*
* It seems that the antenna field in the phy flags value
* is actually a bit field. 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 favor of a
* new 802.11n radiotap field "RX chains" that is defined
* as a bitmask.
*/
rx_status.antenna =
(le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) >>
RX_RES_PHY_FLAGS_ANTENNA_POS;
/* set the preamble flag if appropriate */
if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
/* Set up the HT phy flags */
if (rate_n_flags & RATE_MCS_HT_MSK)
rx_status.encoding = RX_ENC_HT;
if (rate_n_flags & RATE_MCS_HT40_MSK)
rx_status.bw = RATE_INFO_BW_40;
else
rx_status.bw = RATE_INFO_BW_20;
if (rate_n_flags & RATE_MCS_SGI_MSK)
rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
/* We know which subframes of an A-MPDU belong
* together since we get a single PHY response
* from the firmware for all of them.
*/
rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
rx_status.ampdu_reference = il->_4965.ampdu_ref;
}
il4965_pass_packet_to_mac80211(il, header, len, ampdu_status, rxb,
&rx_status);
}
/* Cache phy data (Rx signal strength, etc) for HT frame (N_RX_PHY).
* This will be used later in il_hdl_rx() for N_RX_MPDU. */
static void
il4965_hdl_rx_phy(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
il->_4965.last_phy_res_valid = true;
il->_4965.ampdu_ref++;
memcpy(&il->_4965.last_phy_res, pkt->u.raw,
sizeof(struct il_rx_phy_res));
}
static int
il4965_get_channels_for_scan(struct il_priv *il, struct ieee80211_vif *vif,
enum nl80211_band band, u8 is_active,
u8 n_probes, struct il_scan_channel *scan_ch)
{
struct ieee80211_channel *chan;
const struct ieee80211_supported_band *sband;
const struct il_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
u16 channel;
sband = il_get_hw_mode(il, band);
if (!sband)
return 0;
active_dwell = il_get_active_dwell_time(il, band, n_probes);
passive_dwell = il_get_passive_dwell_time(il, band, vif);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
for (i = 0, added = 0; i < il->scan_request->n_channels; i++) {
chan = il->scan_request->channels[i];
if (chan->band != band)
continue;
channel = chan->hw_value;
scan_ch->channel = cpu_to_le16(channel);
ch_info = il_get_channel_info(il, band, channel);
if (!il_is_channel_valid(ch_info)) {
D_SCAN("Channel %d is INVALID for this band.\n",
channel);
continue;
}
if (!is_active || il_is_channel_passive(ch_info) ||
(chan->flags & IEEE80211_CHAN_NO_IR))
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
if (n_probes)
scan_ch->type |= IL_SCAN_PROBE_MASK(n_probes);
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (band == NL80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
D_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n", channel,
le32_to_cpu(scan_ch->type),
(scan_ch->
type & SCAN_CHANNEL_TYPE_ACTIVE) ? "ACTIVE" : "PASSIVE",
(scan_ch->
type & SCAN_CHANNEL_TYPE_ACTIVE) ? active_dwell :
passive_dwell);
scan_ch++;
added++;
}
D_SCAN("total channels to scan %d\n", added);
return added;
}
static void
il4965_toggle_tx_ant(struct il_priv *il, u8 *ant, u8 valid)
{
int i;
u8 ind = *ant;
for (i = 0; i < RATE_ANT_NUM - 1; i++) {
ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
if (valid & BIT(ind)) {
*ant = ind;
return;
}
}
}
int
il4965_request_scan(struct il_priv *il, struct ieee80211_vif *vif)
{
struct il_host_cmd cmd = {
.id = C_SCAN,
.len = sizeof(struct il_scan_cmd),
.flags = CMD_SIZE_HUGE,
};
struct il_scan_cmd *scan;
u32 rate_flags = 0;
u16 cmd_len;
u16 rx_chain = 0;
enum nl80211_band band;
u8 n_probes = 0;
u8 rx_ant = il->hw_params.valid_rx_ant;
u8 rate;
bool is_active = false;
int chan_mod;
u8 active_chains;
u8 scan_tx_antennas = il->hw_params.valid_tx_ant;
int ret;
lockdep_assert_held(&il->mutex);
if (!il->scan_cmd) {
il->scan_cmd =
kmalloc(sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE,
GFP_KERNEL);
if (!il->scan_cmd) {
D_SCAN("fail to allocate memory for scan\n");
return -ENOMEM;
}
}
scan = il->scan_cmd;
memset(scan, 0, sizeof(struct il_scan_cmd) + IL_MAX_SCAN_SIZE);
scan->quiet_plcp_th = IL_PLCP_QUIET_THRESH;
scan->quiet_time = IL_ACTIVE_QUIET_TIME;
if (il_is_any_associated(il)) {
u16 interval;
u32 extra;
u32 suspend_time = 100;
u32 scan_suspend_time = 100;
D_INFO("Scanning while associated...\n");
interval = vif->bss_conf.beacon_int;
scan->suspend_time = 0;
scan->max_out_time = cpu_to_le32(200 * 1024);
if (!interval)
interval = suspend_time;
extra = (suspend_time / interval) << 22;
scan_suspend_time =
(extra | ((suspend_time % interval) * 1024));
scan->suspend_time = cpu_to_le32(scan_suspend_time);
D_SCAN("suspend_time 0x%X beacon interval %d\n",
scan_suspend_time, interval);
}
if (il->scan_request->n_ssids) {
int i, p = 0;
D_SCAN("Kicking off active scan\n");
for (i = 0; i < il->scan_request->n_ssids; i++) {
/* always does wildcard anyway */
if (!il->scan_request->ssids[i].ssid_len)
continue;
scan->direct_scan[p].id = WLAN_EID_SSID;
scan->direct_scan[p].len =
il->scan_request->ssids[i].ssid_len;
memcpy(scan->direct_scan[p].ssid,
il->scan_request->ssids[i].ssid,
il->scan_request->ssids[i].ssid_len);
n_probes++;
p++;
}
is_active = true;
} else
D_SCAN("Start passive scan.\n");
scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
scan->tx_cmd.sta_id = il->hw_params.bcast_id;
scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
switch (il->scan_band) {
case NL80211_BAND_2GHZ:
scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
chan_mod =
le32_to_cpu(il->active.flags & RXON_FLG_CHANNEL_MODE_MSK) >>
RXON_FLG_CHANNEL_MODE_POS;
if (chan_mod == CHANNEL_MODE_PURE_40) {
rate = RATE_6M_PLCP;
} else {
rate = RATE_1M_PLCP;
rate_flags = RATE_MCS_CCK_MSK;
}
break;
case NL80211_BAND_5GHZ:
rate = RATE_6M_PLCP;
break;
default:
IL_WARN("Invalid scan band\n");
return -EIO;
}
/*
* If active scanning is requested but a certain channel is
* marked passive, we can do active scanning if we detect
* transmissions.
*
* There is an issue with some firmware versions that triggers
* a sysassert on a "good CRC threshold" of zero (== disabled),
* on a radar channel even though this means that we should NOT
* send probes.
*
* The "good CRC threshold" is the number of frames that we
* need to receive during our dwell time on a channel before
* sending out probes -- setting this to a huge value will
* mean we never reach it, but at the same time work around
* the aforementioned issue. Thus use IL_GOOD_CRC_TH_NEVER
* here instead of IL_GOOD_CRC_TH_DISABLED.
*/
scan->good_CRC_th =
is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER;
band = il->scan_band;
if (il->cfg->scan_rx_antennas[band])
rx_ant = il->cfg->scan_rx_antennas[band];
il4965_toggle_tx_ant(il, &il->scan_tx_ant[band], scan_tx_antennas);
rate_flags |= BIT(il->scan_tx_ant[band]) << RATE_MCS_ANT_POS;
scan->tx_cmd.rate_n_flags = cpu_to_le32(rate | rate_flags);
/* In power save mode use one chain, otherwise use all chains */
if (test_bit(S_POWER_PMI, &il->status)) {
/* rx_ant has been set to all valid chains previously */
active_chains =
rx_ant & ((u8) (il->chain_noise_data.active_chains));
if (!active_chains)
active_chains = rx_ant;
D_SCAN("chain_noise_data.active_chains: %u\n",
il->chain_noise_data.active_chains);
rx_ant = il4965_first_antenna(active_chains);
}
/* MIMO is not used here, but value is required */
rx_chain |= il->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
scan->rx_chain = cpu_to_le16(rx_chain);
cmd_len =
il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data,
vif->addr, il->scan_request->ie,
il->scan_request->ie_len,
IL_MAX_SCAN_SIZE - sizeof(*scan));
scan->tx_cmd.len = cpu_to_le16(cmd_len);
scan->filter_flags |=
(RXON_FILTER_ACCEPT_GRP_MSK | RXON_FILTER_BCON_AWARE_MSK);
scan->channel_count =
il4965_get_channels_for_scan(il, vif, band, is_active, n_probes,
(void *)&scan->data[cmd_len]);
if (scan->channel_count == 0) {
D_SCAN("channel count %d\n", scan->channel_count);
return -EIO;
}
cmd.len +=
le16_to_cpu(scan->tx_cmd.len) +
scan->channel_count * sizeof(struct il_scan_channel);
cmd.data = scan;
scan->len = cpu_to_le16(cmd.len);
set_bit(S_SCAN_HW, &il->status);
ret = il_send_cmd_sync(il, &cmd);
if (ret)
clear_bit(S_SCAN_HW, &il->status);
return ret;
}
int
il4965_manage_ibss_station(struct il_priv *il, struct ieee80211_vif *vif,
bool add)
{
struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
if (add)
return il4965_add_bssid_station(il, vif->bss_conf.bssid,
&vif_priv->ibss_bssid_sta_id);
return il_remove_station(il, vif_priv->ibss_bssid_sta_id,
vif->bss_conf.bssid);
}
void
il4965_free_tfds_in_queue(struct il_priv *il, int sta_id, int tid, int freed)
{
lockdep_assert_held(&il->sta_lock);
if (il->stations[sta_id].tid[tid].tfds_in_queue >= freed)
il->stations[sta_id].tid[tid].tfds_in_queue -= freed;
else {
D_TX("free more than tfds_in_queue (%u:%d)\n",
il->stations[sta_id].tid[tid].tfds_in_queue, freed);
il->stations[sta_id].tid[tid].tfds_in_queue = 0;
}
}
#define IL_TX_QUEUE_MSK 0xfffff
static bool
il4965_is_single_rx_stream(struct il_priv *il)
{
return il->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
il->current_ht_config.single_chain_sufficient;
}
#define IL_NUM_RX_CHAINS_MULTIPLE 3
#define IL_NUM_RX_CHAINS_SINGLE 2
#define IL_NUM_IDLE_CHAINS_DUAL 2
#define IL_NUM_IDLE_CHAINS_SINGLE 1
/*
* Determine how many receiver/antenna chains to use.
*
* More provides better reception via diversity. Fewer saves power
* at the expense of throughput, but only when not in powersave to
* start with.
*
* 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
il4965_get_active_rx_chain_count(struct il_priv *il)
{
/* # of Rx chains to use when expecting MIMO. */
if (il4965_is_single_rx_stream(il))
return IL_NUM_RX_CHAINS_SINGLE;
else
return IL_NUM_RX_CHAINS_MULTIPLE;
}
/*
* When we are in power saving mode, unless device support spatial
* multiplexing power save, use the active count for rx chain count.
*/
static int
il4965_get_idle_rx_chain_count(struct il_priv *il, int active_cnt)
{
/* # Rx chains when idling, depending on SMPS mode */
switch (il->current_ht_config.smps) {
case IEEE80211_SMPS_STATIC:
case IEEE80211_SMPS_DYNAMIC:
return IL_NUM_IDLE_CHAINS_SINGLE;
case IEEE80211_SMPS_OFF:
return active_cnt;
default:
WARN(1, "invalid SMPS mode %d", il->current_ht_config.smps);
return active_cnt;
}
}
/* up to 4 chains */
static u8
il4965_count_chain_bitmap(u32 chain_bitmap)
{
u8 res;
res = (chain_bitmap & BIT(0)) >> 0;
res += (chain_bitmap & BIT(1)) >> 1;
res += (chain_bitmap & BIT(2)) >> 2;
res += (chain_bitmap & BIT(3)) >> 3;
return res;
}
/*
* il4965_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
il4965_set_rxon_chain(struct il_priv *il)
{
bool is_single = il4965_is_single_rx_stream(il);
bool is_cam = !test_bit(S_POWER_PMI, &il->status);
u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
u32 active_chains;
u16 rx_chain;
/* Tell uCode which antennas are actually connected.
* Before first association, we assume all antennas are connected.
* Just after first association, il4965_chain_noise_calibration()
* checks which antennas actually *are* connected. */
if (il->chain_noise_data.active_chains)
active_chains = il->chain_noise_data.active_chains;
else
active_chains = il->hw_params.valid_rx_ant;
rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
/* How many receivers should we use? */
active_rx_cnt = il4965_get_active_rx_chain_count(il);
idle_rx_cnt = il4965_get_idle_rx_chain_count(il, active_rx_cnt);
/* correct rx chain count according hw settings
* and chain noise calibration
*/
valid_rx_cnt = il4965_count_chain_bitmap(active_chains);
if (valid_rx_cnt < active_rx_cnt)
active_rx_cnt = valid_rx_cnt;
if (valid_rx_cnt < idle_rx_cnt)
idle_rx_cnt = valid_rx_cnt;
rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
il->staging.rx_chain = cpu_to_le16(rx_chain);
if (!is_single && active_rx_cnt >= IL_NUM_RX_CHAINS_SINGLE && is_cam)
il->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
else
il->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
D_ASSOC("rx_chain=0x%X active=%d idle=%d\n", il->staging.rx_chain,
active_rx_cnt, idle_rx_cnt);
WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
active_rx_cnt < idle_rx_cnt);
}
static const char *
il4965_get_fh_string(int cmd)
{
switch (cmd) {
IL_CMD(FH49_RSCSR_CHNL0_STTS_WPTR_REG);
IL_CMD(FH49_RSCSR_CHNL0_RBDCB_BASE_REG);
IL_CMD(FH49_RSCSR_CHNL0_WPTR);
IL_CMD(FH49_MEM_RCSR_CHNL0_CONFIG_REG);
IL_CMD(FH49_MEM_RSSR_SHARED_CTRL_REG);
IL_CMD(FH49_MEM_RSSR_RX_STATUS_REG);
IL_CMD(FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
IL_CMD(FH49_TSSR_TX_STATUS_REG);
IL_CMD(FH49_TSSR_TX_ERROR_REG);
default:
return "UNKNOWN";
}
}
int
il4965_dump_fh(struct il_priv *il, char **buf, bool display)
{
int i;
#ifdef CONFIG_IWLEGACY_DEBUG
int pos = 0;
size_t bufsz = 0;
#endif
static const u32 fh_tbl[] = {
FH49_RSCSR_CHNL0_STTS_WPTR_REG,
FH49_RSCSR_CHNL0_RBDCB_BASE_REG,
FH49_RSCSR_CHNL0_WPTR,
FH49_MEM_RCSR_CHNL0_CONFIG_REG,
FH49_MEM_RSSR_SHARED_CTRL_REG,
FH49_MEM_RSSR_RX_STATUS_REG,
FH49_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
FH49_TSSR_TX_STATUS_REG,
FH49_TSSR_TX_ERROR_REG
};
#ifdef CONFIG_IWLEGACY_DEBUG
if (display) {
bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
*buf = kmalloc(bufsz, GFP_KERNEL);
if (!*buf)
return -ENOMEM;
pos +=
scnprintf(*buf + pos, bufsz - pos, "FH register values:\n");
for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
pos +=
scnprintf(*buf + pos, bufsz - pos,
" %34s: 0X%08x\n",
il4965_get_fh_string(fh_tbl[i]),
il_rd(il, fh_tbl[i]));
}
return pos;
}
#endif
IL_ERR("FH register values:\n");
for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
IL_ERR(" %34s: 0X%08x\n", il4965_get_fh_string(fh_tbl[i]),
il_rd(il, fh_tbl[i]));
}
return 0;
}
static void
il4965_hdl_missed_beacon(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
il->missed_beacon_threshold) {
D_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
le32_to_cpu(missed_beacon->consecutive_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));
if (!test_bit(S_SCANNING, &il->status))
il4965_init_sensitivity(il);
}
}
/* 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
il4965_rx_calc_noise(struct il_priv *il)
{
struct stats_rx_non_phy *rx_info;
int num_active_rx = 0;
int total_silence = 0;
int bcn_silence_a, bcn_silence_b, bcn_silence_c;
int last_rx_noise;
rx_info = &(il->_4965.stats.rx.general);
bcn_silence_a =
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
bcn_silence_b =
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
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)
last_rx_noise = (total_silence / num_active_rx) - 107;
else
last_rx_noise = IL_NOISE_MEAS_NOT_AVAILABLE;
D_CALIB("inband silence a %u, b %u, c %u, dBm %d\n", bcn_silence_a,
bcn_silence_b, bcn_silence_c, last_rx_noise);
}
#ifdef CONFIG_IWLEGACY_DEBUGFS
/*
* based on the assumption of all stats counter are in DWORD
* FIXME: This function is for debugging, do not deal with
* the case of counters roll-over.
*/
static void
il4965_accumulative_stats(struct il_priv *il, __le32 * stats)
{
int i, size;
__le32 *prev_stats;
u32 *accum_stats;
u32 *delta, *max_delta;
struct stats_general_common *general, *accum_general;
prev_stats = (__le32 *) &il->_4965.stats;
accum_stats = (u32 *) &il->_4965.accum_stats;
size = sizeof(struct il_notif_stats);
general = &il->_4965.stats.general.common;
accum_general = &il->_4965.accum_stats.general.common;
delta = (u32 *) &il->_4965.delta_stats;
max_delta = (u32 *) &il->_4965.max_delta;
for (i = sizeof(__le32); i < size;
i +=
sizeof(__le32), stats++, prev_stats++, delta++, max_delta++,
accum_stats++) {
if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
*delta =
(le32_to_cpu(*stats) - le32_to_cpu(*prev_stats));
*accum_stats += *delta;
if (*delta > *max_delta)
*max_delta = *delta;
}
}
/* reset accumulative stats for "no-counter" type stats */
accum_general->temperature = general->temperature;
accum_general->ttl_timestamp = general->ttl_timestamp;
}
#endif
static void
il4965_hdl_stats(struct il_priv *il, struct il_rx_buf *rxb)
{
const int recalib_seconds = 60;
bool change;
struct il_rx_pkt *pkt = rxb_addr(rxb);
D_RX("Statistics notification received (%d vs %d).\n",
(int)sizeof(struct il_notif_stats),
le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK);
change =
((il->_4965.stats.general.common.temperature !=
pkt->u.stats.general.common.temperature) ||
((il->_4965.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK) !=
(pkt->u.stats.flag & STATS_REPLY_FLG_HT40_MODE_MSK)));
#ifdef CONFIG_IWLEGACY_DEBUGFS
il4965_accumulative_stats(il, (__le32 *) &pkt->u.stats);
#endif
/* TODO: reading some of stats is unneeded */
memcpy(&il->_4965.stats, &pkt->u.stats, sizeof(il->_4965.stats));
set_bit(S_STATS, &il->status);
/*
* Reschedule the stats timer to occur in recalib_seconds to ensure
* we get a thermal update even if the uCode doesn't give us one
*/
mod_timer(&il->stats_periodic,
jiffies + msecs_to_jiffies(recalib_seconds * 1000));
if (unlikely(!test_bit(S_SCANNING, &il->status)) &&
(pkt->hdr.cmd == N_STATS)) {
il4965_rx_calc_noise(il);
queue_work(il->workqueue, &il->run_time_calib_work);
}
if (change)
il4965_temperature_calib(il);
}
static void
il4965_hdl_c_stats(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATS_CLEAR_MSK) {
#ifdef CONFIG_IWLEGACY_DEBUGFS
memset(&il->_4965.accum_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.delta_stats, 0,
sizeof(struct il_notif_stats));
memset(&il->_4965.max_delta, 0, sizeof(struct il_notif_stats));
#endif
D_RX("Statistics have been cleared\n");
}
il4965_hdl_stats(il, rxb);
}
/*
* mac80211 queues, ACs, hardware queues, FIFOs.
*
* Cf. https://wireless.wiki.kernel.org/en/developers/Documentation/mac80211/queues
*
* Mac80211 uses the following numbers, which we get as from it
* by way of skb_get_queue_mapping(skb):
*
* VO 0
* VI 1
* BE 2
* BK 3
*
*
* Regular (not A-MPDU) frames are put into hardware queues corresponding
* to the FIFOs, see comments in iwl-prph.h. Aggregated frames get their
* own queue per aggregation session (RA/TID combination), such queues are
* set up to map into FIFOs too, for which we need an AC->FIFO mapping. In
* order to map frames to the right queue, we also need an AC->hw queue
* mapping. This is implemented here.
*
* Due to the way hw queues are set up (by the hw specific modules like
* 4965.c), the AC->hw queue mapping is the identity
* mapping.
*/
static const u8 tid_to_ac[] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO
};
static inline int
il4965_get_ac_from_tid(u16 tid)
{
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return tid_to_ac[tid];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
static inline int
il4965_get_fifo_from_tid(u16 tid)
{
static const u8 ac_to_fifo[] = {
IL_TX_FIFO_VO,
IL_TX_FIFO_VI,
IL_TX_FIFO_BE,
IL_TX_FIFO_BK,
};
if (likely(tid < ARRAY_SIZE(tid_to_ac)))
return ac_to_fifo[tid_to_ac[tid]];
/* no support for TIDs 8-15 yet */
return -EINVAL;
}
/*
* handle build C_TX command notification.
*/
static void
il4965_tx_cmd_build_basic(struct il_priv *il, struct sk_buff *skb,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
struct ieee80211_hdr *hdr, u8 std_id)
{
__le16 fc = hdr->frame_control;
__le32 tx_flags = tx_cmd->tx_flags;
tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK_MSK;
if (ieee80211_is_mgmt(fc))
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
if (ieee80211_is_probe_resp(fc) &&
!(le16_to_cpu(hdr->seq_ctrl) & 0xf))
tx_flags |= TX_CMD_FLG_TSF_MSK;
} else {
tx_flags &= (~TX_CMD_FLG_ACK_MSK);
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
if (ieee80211_is_back_req(fc))
tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
tx_cmd->sta_id = std_id;
if (ieee80211_has_morefrags(fc))
tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
if (ieee80211_is_data_qos(fc)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
} else {
tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
}
il_tx_cmd_protection(il, info, fc, &tx_flags);
tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
if (ieee80211_is_mgmt(fc)) {
if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3);
else
tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2);
} else {
tx_cmd->timeout.pm_frame_timeout = 0;
}
tx_cmd->driver_txop = 0;
tx_cmd->tx_flags = tx_flags;
tx_cmd->next_frame_len = 0;
}
static void
il4965_tx_cmd_build_rate(struct il_priv *il,
struct il_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta,
__le16 fc)
{
const u8 rts_retry_limit = 60;
u32 rate_flags;
int rate_idx;
u8 data_retry_limit;
u8 rate_plcp;
/* Set retry limit on DATA packets and Probe Responses */
if (ieee80211_is_probe_resp(fc))
data_retry_limit = 3;
else
data_retry_limit = IL4965_DEFAULT_TX_RETRY;
tx_cmd->data_retry_limit = data_retry_limit;
/* Set retry limit on RTS packets */
tx_cmd->rts_retry_limit = min(data_retry_limit, rts_retry_limit);
/* DATA packets will use the uCode station table for rate/antenna
* selection */
if (ieee80211_is_data(fc)) {
tx_cmd->initial_rate_idx = 0;
tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
return;
}
/**
* If the current TX rate stored in mac80211 has the MCS bit set, it's
* not really a TX rate. Thus, we use the lowest supported rate for
* this band. Also use the lowest supported rate if the stored rate
* idx is invalid.
*/
rate_idx = info->control.rates[0].idx;
if ((info->control.rates[0].flags & IEEE80211_TX_RC_MCS) || rate_idx < 0
|| rate_idx > RATE_COUNT_LEGACY)
rate_idx = rate_lowest_index(&il->bands[info->band], sta);
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == NL80211_BAND_5GHZ)
rate_idx += IL_FIRST_OFDM_RATE;
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = il_rates[rate_idx].plcp;
/* Zero out flags for this packet */
rate_flags = 0;
/* Set CCK flag as needed */
if (rate_idx >= IL_FIRST_CCK_RATE && rate_idx <= IL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
/* Set up antennas */
il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
rate_flags |= BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = cpu_to_le32(rate_plcp | rate_flags);
}
static void
il4965_tx_cmd_build_hwcrypto(struct il_priv *il, struct ieee80211_tx_info *info,
struct il_tx_cmd *tx_cmd, struct sk_buff *skb_frag,
int sta_id)
{
struct ieee80211_key_conf *keyconf = info->control.hw_key;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
tx_cmd->sec_ctl = TX_CMD_SEC_CCM;
memcpy(tx_cmd->key, keyconf->key, keyconf->keylen);
if (info->flags & IEEE80211_TX_CTL_AMPDU)
tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
D_TX("tx_cmd with AES hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
D_TX("tx_cmd with tkip hwcrypto\n");
break;
case WLAN_CIPHER_SUITE_WEP104:
tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
fallthrough;
case WLAN_CIPHER_SUITE_WEP40:
tx_cmd->sec_ctl |=
(TX_CMD_SEC_WEP | (keyconf->keyidx & TX_CMD_SEC_MSK) <<
TX_CMD_SEC_SHIFT);
memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
D_TX("Configuring packet for WEP encryption " "with key %d\n",
keyconf->keyidx);
break;
default:
IL_ERR("Unknown encode cipher %x\n", keyconf->cipher);
break;
}
}
/*
* start C_TX command process
*/
int
il4965_tx_skb(struct il_priv *il,
struct ieee80211_sta *sta,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct il_station_priv *sta_priv = NULL;
struct il_tx_queue *txq;
struct il_queue *q;
struct il_device_cmd *out_cmd;
struct il_cmd_meta *out_meta;
struct il_tx_cmd *tx_cmd;
int txq_id;
dma_addr_t phys_addr;
dma_addr_t txcmd_phys;
dma_addr_t scratch_phys;
u16 len, firstlen, secondlen;
u16 seq_number = 0;
__le16 fc;
u8 hdr_len;
u8 sta_id;
u8 wait_write_ptr = 0;
u8 tid = 0;
u8 *qc = NULL;
unsigned long flags;
bool is_agg = false;
spin_lock_irqsave(&il->lock, flags);
if (il_is_rfkill(il)) {
D_DROP("Dropping - RF KILL\n");
goto drop_unlock;
}
fc = hdr->frame_control;
#ifdef CONFIG_IWLEGACY_DEBUG
if (ieee80211_is_auth(fc))
D_TX("Sending AUTH frame\n");
else if (ieee80211_is_assoc_req(fc))
D_TX("Sending ASSOC frame\n");
else if (ieee80211_is_reassoc_req(fc))
D_TX("Sending REASSOC frame\n");
#endif
hdr_len = ieee80211_hdrlen(fc);
/* For management frames use broadcast id to do not break aggregation */
if (!ieee80211_is_data(fc))
sta_id = il->hw_params.bcast_id;
else {
/* Find idx into station table for destination station */
sta_id = il_sta_id_or_broadcast(il, sta);
if (sta_id == IL_INVALID_STATION) {
D_DROP("Dropping - INVALID STATION: %pM\n", hdr->addr1);
goto drop_unlock;
}
}
D_TX("station Id %d\n", sta_id);
if (sta)
sta_priv = (void *)sta->drv_priv;
if (sta_priv && sta_priv->asleep &&
(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)) {
/*
* This sends an asynchronous command to the device,
* but we can rely on it being processed before the
* next frame is processed -- and the next frame to
* this station is the one that will consume this
* counter.
* For now set the counter to just 1 since we do not
* support uAPSD yet.
*/
il4965_sta_modify_sleep_tx_count(il, sta_id, 1);
}
/* FIXME: remove me ? */
WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
/* Access category (AC) is also the queue number */
txq_id = skb_get_queue_mapping(skb);
/* irqs already disabled/saved above when locking il->lock */
spin_lock(&il->sta_lock);
if (ieee80211_is_data_qos(fc)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
if (WARN_ON_ONCE(tid >= MAX_TID_COUNT)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
seq_number = il->stations[sta_id].tid[tid].seq_number;
seq_number &= IEEE80211_SCTL_SEQ;
hdr->seq_ctrl =
hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(seq_number);
seq_number += 0x10;
/* aggregation is on for this <sta,tid> */
if (info->flags & IEEE80211_TX_CTL_AMPDU &&
il->stations[sta_id].tid[tid].agg.state == IL_AGG_ON) {
txq_id = il->stations[sta_id].tid[tid].agg.txq_id;
is_agg = true;
}
}
txq = &il->txq[txq_id];
q = &txq->q;
if (unlikely(il_queue_space(q) < q->high_mark)) {
spin_unlock(&il->sta_lock);
goto drop_unlock;
}
if (ieee80211_is_data_qos(fc)) {
il->stations[sta_id].tid[tid].tfds_in_queue++;
if (!ieee80211_has_morefrags(fc))
il->stations[sta_id].tid[tid].seq_number = seq_number;
}
spin_unlock(&il->sta_lock);
txq->skbs[q->write_ptr] = skb;
/* Set up first empty entry in queue's array of Tx/cmd buffers */
out_cmd = txq->cmd[q->write_ptr];
out_meta = &txq->meta[q->write_ptr];
tx_cmd = &out_cmd->cmd.tx;
memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
memset(tx_cmd, 0, sizeof(struct il_tx_cmd));
/*
* Set up the Tx-command (not MAC!) header.
* Store the chosen Tx queue and TFD idx within the sequence field;
* after Tx, uCode's Tx response will return this value so driver can
* locate the frame within the tx queue and do post-tx processing.
*/
out_cmd->hdr.cmd = C_TX;
out_cmd->hdr.sequence =
cpu_to_le16((u16)
(QUEUE_TO_SEQ(txq_id) | IDX_TO_SEQ(q->write_ptr)));
/* Copy MAC header from skb into command buffer */
memcpy(tx_cmd->hdr, hdr, hdr_len);
/* Total # bytes to be transmitted */
tx_cmd->len = cpu_to_le16((u16) skb->len);
if (info->control.hw_key)
il4965_tx_cmd_build_hwcrypto(il, info, tx_cmd, skb, sta_id);
/* TODO need this for burst mode later on */
il4965_tx_cmd_build_basic(il, skb, tx_cmd, info, hdr, sta_id);
il4965_tx_cmd_build_rate(il, tx_cmd, info, sta, fc);
/*
* Use the first empty entry in this queue's command buffer array
* to contain the Tx command and MAC header concatenated together
* (payload data will be in another buffer).
* Size of this varies, due to varying MAC header length.
* If end is not dword aligned, we'll have 2 extra bytes at the end
* of the MAC header (device reads on dword boundaries).
* We'll tell device about this padding later.
*/
len = sizeof(struct il_tx_cmd) + sizeof(struct il_cmd_header) + hdr_len;
firstlen = (len + 3) & ~3;
/* Tell NIC about any 2-byte padding after MAC header */
if (firstlen != len)
tx_cmd->tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
/* Physical address of this Tx command's header (not MAC header!),
* within command buffer array. */
txcmd_phys = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, firstlen,
DMA_BIDIRECTIONAL);
if (unlikely(dma_mapping_error(&il->pci_dev->dev, txcmd_phys)))
goto drop_unlock;
/* Set up TFD's 2nd entry to point directly to remainder of skb,
* if any (802.11 null frames have no payload). */
secondlen = skb->len - hdr_len;
if (secondlen > 0) {
phys_addr = dma_map_single(&il->pci_dev->dev, skb->data + hdr_len,
secondlen, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr)))
goto drop_unlock;
}
/* Add buffer containing Tx command and MAC(!) header to TFD's
* first entry */
il->ops->txq_attach_buf_to_tfd(il, txq, txcmd_phys, firstlen, 1, 0);
dma_unmap_addr_set(out_meta, mapping, txcmd_phys);
dma_unmap_len_set(out_meta, len, firstlen);
if (secondlen)
il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, secondlen,
0, 0);
if (!ieee80211_has_morefrags(hdr->frame_control)) {
txq->need_update = 1;
} else {
wait_write_ptr = 1;
txq->need_update = 0;
}
scratch_phys =
txcmd_phys + sizeof(struct il_cmd_header) +
offsetof(struct il_tx_cmd, scratch);
/* take back ownership of DMA buffer to enable update */
dma_sync_single_for_cpu(&il->pci_dev->dev, txcmd_phys, firstlen,
DMA_BIDIRECTIONAL);
tx_cmd->dram_lsb_ptr = cpu_to_le32(scratch_phys);
tx_cmd->dram_msb_ptr = il_get_dma_hi_addr(scratch_phys);
il_update_stats(il, true, fc, skb->len);
D_TX("sequence nr = 0X%x\n", le16_to_cpu(out_cmd->hdr.sequence));
D_TX("tx_flags = 0X%x\n", le32_to_cpu(tx_cmd->tx_flags));
il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd, sizeof(*tx_cmd));
il_print_hex_dump(il, IL_DL_TX, (u8 *) tx_cmd->hdr, hdr_len);
/* Set up entry for this TFD in Tx byte-count array */
if (info->flags & IEEE80211_TX_CTL_AMPDU)
il->ops->txq_update_byte_cnt_tbl(il, txq, le16_to_cpu(tx_cmd->len));
dma_sync_single_for_device(&il->pci_dev->dev, txcmd_phys, firstlen,
DMA_BIDIRECTIONAL);
/* Tell device the write idx *just past* this latest filled TFD */
q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
/*
* At this point the frame is "transmitted" successfully
* and we will get a TX status notification eventually,
* regardless of the value of ret. "ret" only indicates
* whether or not we should update the write pointer.
*/
/*
* Avoid atomic ops if it isn't an associated client.
* Also, if this is a packet for aggregation, don't
* increase the counter because the ucode will stop
* aggregation queues when their respective station
* goes to sleep.
*/
if (sta_priv && sta_priv->client && !is_agg)
atomic_inc(&sta_priv->pending_frames);
if (il_queue_space(q) < q->high_mark && il->mac80211_registered) {
if (wait_write_ptr) {
spin_lock_irqsave(&il->lock, flags);
txq->need_update = 1;
il_txq_update_write_ptr(il, txq);
spin_unlock_irqrestore(&il->lock, flags);
} else {
il_stop_queue(il, txq);
}
}
return 0;
drop_unlock:
spin_unlock_irqrestore(&il->lock, flags);
return -1;
}
static inline int
il4965_alloc_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr, size_t size)
{
ptr->addr = dma_alloc_coherent(&il->pci_dev->dev, size, &ptr->dma,
GFP_KERNEL);
if (!ptr->addr)
return -ENOMEM;
ptr->size = size;
return 0;
}
static inline void
il4965_free_dma_ptr(struct il_priv *il, struct il_dma_ptr *ptr)
{
if (unlikely(!ptr->addr))
return;
dma_free_coherent(&il->pci_dev->dev, ptr->size, ptr->addr, ptr->dma);
memset(ptr, 0, sizeof(*ptr));
}
/*
* il4965_hw_txq_ctx_free - Free TXQ Context
*
* Destroy all TX DMA queues and structures
*/
void
il4965_hw_txq_ctx_free(struct il_priv *il)
{
int txq_id;
/* Tx queues */
if (il->txq) {
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_free(il);
else
il_tx_queue_free(il, txq_id);
}
il4965_free_dma_ptr(il, &il->kw);
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
/* free tx queue structure */
il_free_txq_mem(il);
}
/*
* il4965_txq_ctx_alloc - allocate TX queue context
* Allocate all Tx DMA structures and initialize them
*/
int
il4965_txq_ctx_alloc(struct il_priv *il)
{
int ret, txq_id;
unsigned long flags;
/* Free all tx/cmd queues and keep-warm buffer */
il4965_hw_txq_ctx_free(il);
ret =
il4965_alloc_dma_ptr(il, &il->scd_bc_tbls,
il->hw_params.scd_bc_tbls_size);
if (ret) {
IL_ERR("Scheduler BC Table allocation failed\n");
goto error_bc_tbls;
}
/* Alloc keep-warm buffer */
ret = il4965_alloc_dma_ptr(il, &il->kw, IL_KW_SIZE);
if (ret) {
IL_ERR("Keep Warm allocation failed\n");
goto error_kw;
}
/* allocate tx queue structure */
ret = il_alloc_txq_mem(il);
if (ret)
goto error;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++) {
ret = il_tx_queue_init(il, txq_id);
if (ret) {
IL_ERR("Tx %d queue init failed\n", txq_id);
goto error;
}
}
return ret;
error:
il4965_hw_txq_ctx_free(il);
il4965_free_dma_ptr(il, &il->kw);
error_kw:
il4965_free_dma_ptr(il, &il->scd_bc_tbls);
error_bc_tbls:
return ret;
}
void
il4965_txq_ctx_reset(struct il_priv *il)
{
int txq_id;
unsigned long flags;
spin_lock_irqsave(&il->lock, flags);
/* Turn off all Tx DMA fifos */
il4965_txq_set_sched(il, 0);
/* Tell NIC where to find the "keep warm" buffer */
il_wr(il, FH49_KW_MEM_ADDR_REG, il->kw.dma >> 4);
spin_unlock_irqrestore(&il->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4) */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
il_tx_queue_reset(il, txq_id);
}
static void
il4965_txq_ctx_unmap(struct il_priv *il)
{
int txq_id;
if (!il->txq)
return;
/* Unmap DMA from host system and free skb's */
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (txq_id == il->cmd_queue)
il_cmd_queue_unmap(il);
else
il_tx_queue_unmap(il, txq_id);
}
/*
* il4965_txq_ctx_stop - Stop all Tx DMA channels
*/
void
il4965_txq_ctx_stop(struct il_priv *il)
{
int ch, ret;
_il_wr_prph(il, IL49_SCD_TXFACT, 0);
/* Stop each Tx DMA channel, and wait for it to be idle */
for (ch = 0; ch < il->hw_params.dma_chnl_num; ch++) {
_il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(ch), 0x0);
ret =
_il_poll_bit(il, FH49_TSSR_TX_STATUS_REG,
FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
FH49_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(ch),
1000);
if (ret < 0)
IL_ERR("Timeout stopping DMA channel %d [0x%08x]",
ch, _il_rd(il, FH49_TSSR_TX_STATUS_REG));
}
}
/*
* 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), reserved (5, 6)
*/
static int
il4965_txq_ctx_activate_free(struct il_priv *il)
{
int txq_id;
for (txq_id = 0; txq_id < il->hw_params.max_txq_num; txq_id++)
if (!test_and_set_bit(txq_id, &il->txq_ctx_active_msk))
return txq_id;
return -1;
}
/*
* il4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void
il4965_tx_queue_stop_scheduler(struct il_priv *il, 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. */
il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(1 << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
}
/*
* il4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
*/
static int
il4965_tx_queue_set_q2ratid(struct il_priv *il, u16 ra_tid, u16 txq_id)
{
u32 tbl_dw_addr;
u32 tbl_dw;
u16 scd_q2ratid;
scd_q2ratid = ra_tid & IL_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
tbl_dw_addr =
il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
tbl_dw = il_read_targ_mem(il, tbl_dw_addr);
if (txq_id & 0x1)
tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
else
tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
il_write_targ_mem(il, tbl_dw_addr, tbl_dw);
return 0;
}
/*
* il4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
*
* NOTE: txq_id must be greater than IL49_FIRST_AMPDU_QUEUE,
* i.e. it must be one of the higher queues used for aggregation
*/
static int
il4965_txq_agg_enable(struct il_priv *il, int txq_id, int tx_fifo, int sta_id,
int tid, u16 ssn_idx)
{
unsigned long flags;
u16 ra_tid;
int ret;
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->num_of_ampdu_queues <= txq_id)) {
IL_WARN("queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->num_of_ampdu_queues - 1);
return -EINVAL;
}
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
ret = il4965_sta_tx_modify_enable_tid(il, sta_id, tid);
if (ret)
return ret;
spin_lock_irqsave(&il->lock, flags);
/* Stop this Tx queue before configuring it */
il4965_tx_queue_stop_scheduler(il, txq_id);
/* Map receiver-address / traffic-ID to this queue */
il4965_tx_queue_set_q2ratid(il, ra_tid, txq_id);
/* Set this queue as a chain-building queue */
il_set_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
/* Place first TFD at idx corresponding to start sequence number.
* Assumes that ssn_idx is valid (!= 0xFFF) */
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
/* Set up Tx win size and frame limit for this queue */
il_write_targ_mem(il,
il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
(SCD_WIN_SIZE << IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS)
& IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
il_write_targ_mem(il,
il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
(SCD_FRAME_LIMIT <<
IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
il_set_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 1);
spin_unlock_irqrestore(&il->lock, flags);
return 0;
}
int
il4965_tx_agg_start(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 * ssn)
{
int sta_id;
int tx_fifo;
int txq_id;
int ret;
unsigned long flags;
struct il_tid_data *tid_data;
/* FIXME: warning if tx fifo not found ? */
tx_fifo = il4965_get_fifo_from_tid(tid);
if (unlikely(tx_fifo < 0))
return tx_fifo;
D_HT("%s on ra = %pM tid = %d\n", __func__, sta->addr, tid);
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Start AGG on invalid station\n");
return -ENXIO;
}
if (unlikely(tid >= MAX_TID_COUNT))
return -EINVAL;
if (il->stations[sta_id].tid[tid].agg.state != IL_AGG_OFF) {
IL_ERR("Start AGG when state is not IL_AGG_OFF !\n");
return -ENXIO;
}
txq_id = il4965_txq_ctx_activate_free(il);
if (txq_id == -1) {
IL_ERR("No free aggregation queue available\n");
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
*ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
tid_data->agg.txq_id = txq_id;
il_set_swq_id(&il->txq[txq_id], il4965_get_ac_from_tid(tid), txq_id);
spin_unlock_irqrestore(&il->sta_lock, flags);
ret = il4965_txq_agg_enable(il, txq_id, tx_fifo, sta_id, tid, *ssn);
if (ret)
return ret;
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
if (tid_data->tfds_in_queue == 0) {
D_HT("HW queue is empty\n");
tid_data->agg.state = IL_AGG_ON;
ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
} else {
D_HT("HW queue is NOT empty: %d packets in HW queue\n",
tid_data->tfds_in_queue);
tid_data->agg.state = IL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&il->sta_lock, flags);
return ret;
}
/*
* txq_id must be greater than IL49_FIRST_AMPDU_QUEUE
* il->lock must be held by the caller
*/
static int
il4965_txq_agg_disable(struct il_priv *il, u16 txq_id, u16 ssn_idx, u8 tx_fifo)
{
if ((IL49_FIRST_AMPDU_QUEUE > txq_id) ||
(IL49_FIRST_AMPDU_QUEUE +
il->cfg->num_of_ampdu_queues <= txq_id)) {
IL_WARN("queue number out of range: %d, must be %d to %d\n",
txq_id, IL49_FIRST_AMPDU_QUEUE,
IL49_FIRST_AMPDU_QUEUE +
il->cfg->num_of_ampdu_queues - 1);
return -EINVAL;
}
il4965_tx_queue_stop_scheduler(il, txq_id);
il_clear_bits_prph(il, IL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
il->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
il->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
il4965_set_wr_ptrs(il, txq_id, ssn_idx);
il_clear_bits_prph(il, IL49_SCD_INTERRUPT_MASK, (1 << txq_id));
il_txq_ctx_deactivate(il, txq_id);
il4965_tx_queue_set_status(il, &il->txq[txq_id], tx_fifo, 0);
return 0;
}
int
il4965_tx_agg_stop(struct il_priv *il, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid)
{
int tx_fifo_id, txq_id, sta_id, ssn;
struct il_tid_data *tid_data;
int write_ptr, read_ptr;
unsigned long flags;
/* FIXME: warning if tx_fifo_id not found ? */
tx_fifo_id = il4965_get_fifo_from_tid(tid);
if (unlikely(tx_fifo_id < 0))
return tx_fifo_id;
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Invalid station for AGG tid %d\n", tid);
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
tid_data = &il->stations[sta_id].tid[tid];
ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
txq_id = tid_data->agg.txq_id;
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_EMPTYING_HW_QUEUE_ADDBA:
/*
* This can happen if the peer stops aggregation
* again before we've had a chance to drain the
* queue we selected previously, i.e. before the
* session was really started completely.
*/
D_HT("AGG stop before setup done\n");
goto turn_off;
case IL_AGG_ON:
break;
default:
IL_WARN("Stopping AGG while state not ON or starting\n");
}
write_ptr = il->txq[txq_id].q.write_ptr;
read_ptr = il->txq[txq_id].q.read_ptr;
/* The queue is not empty */
if (write_ptr != read_ptr) {
D_HT("Stopping a non empty AGG HW QUEUE\n");
il->stations[sta_id].tid[tid].agg.state =
IL_EMPTYING_HW_QUEUE_DELBA;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
D_HT("HW queue is empty\n");
turn_off:
il->stations[sta_id].tid[tid].agg.state = IL_AGG_OFF;
/* do not restore/save irqs */
spin_unlock(&il->sta_lock);
spin_lock(&il->lock);
/*
* the only reason this call can fail is queue number out of range,
* which can happen if uCode is reloaded and all the station
* information are lost. if it is outside the range, there is no need
* to deactivate the uCode queue, just return "success" to allow
* mac80211 to clean up it own data.
*/
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo_id);
spin_unlock_irqrestore(&il->lock, flags);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
return 0;
}
int
il4965_txq_check_empty(struct il_priv *il, int sta_id, u8 tid, int txq_id)
{
struct il_queue *q = &il->txq[txq_id].q;
u8 *addr = il->stations[sta_id].sta.sta.addr;
struct il_tid_data *tid_data = &il->stations[sta_id].tid[tid];
lockdep_assert_held(&il->sta_lock);
switch (il->stations[sta_id].tid[tid].agg.state) {
case IL_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 = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
int tx_fifo = il4965_get_fifo_from_tid(tid);
D_HT("HW queue empty: continue DELBA flow\n");
il4965_txq_agg_disable(il, txq_id, ssn, tx_fifo);
tid_data->agg.state = IL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(il->vif, addr, tid);
}
break;
case IL_EMPTYING_HW_QUEUE_ADDBA:
/* We are reclaiming the last packet of the queue */
if (tid_data->tfds_in_queue == 0) {
D_HT("HW queue empty: continue ADDBA flow\n");
tid_data->agg.state = IL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(il->vif, addr, tid);
}
break;
}
return 0;
}
static void
il4965_non_agg_tx_status(struct il_priv *il, const u8 *addr1)
{
struct ieee80211_sta *sta;
struct il_station_priv *sta_priv;
rcu_read_lock();
sta = ieee80211_find_sta(il->vif, addr1);
if (sta) {
sta_priv = (void *)sta->drv_priv;
/* avoid atomic ops if this isn't a client */
if (sta_priv->client &&
atomic_dec_return(&sta_priv->pending_frames) == 0)
ieee80211_sta_block_awake(il->hw, sta, false);
}
rcu_read_unlock();
}
static void
il4965_tx_status(struct il_priv *il, struct sk_buff *skb, bool is_agg)
{
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (!is_agg)
il4965_non_agg_tx_status(il, hdr->addr1);
ieee80211_tx_status_irqsafe(il->hw, skb);
}
int
il4965_tx_queue_reclaim(struct il_priv *il, int txq_id, int idx)
{
struct il_tx_queue *txq = &il->txq[txq_id];
struct il_queue *q = &txq->q;
int nfreed = 0;
struct ieee80211_hdr *hdr;
struct sk_buff *skb;
if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
"is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
q->write_ptr, q->read_ptr);
return 0;
}
for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
skb = txq->skbs[txq->q.read_ptr];
if (WARN_ON_ONCE(skb == NULL))
continue;
hdr = (struct ieee80211_hdr *) skb->data;
if (ieee80211_is_data_qos(hdr->frame_control))
nfreed++;
il4965_tx_status(il, skb, txq_id >= IL4965_FIRST_AMPDU_QUEUE);
txq->skbs[txq->q.read_ptr] = NULL;
il->ops->txq_free_tfd(il, txq);
}
return nfreed;
}
/*
* il4965_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
il4965_tx_status_reply_compressed_ba(struct il_priv *il, struct il_ht_agg *agg,
struct il_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);
int successes = 0;
struct ieee80211_tx_info *info;
u64 bitmap, sent_bitmap;
if (unlikely(!agg->wait_for_ba)) {
if (unlikely(ba_resp->bitmap))
IL_ERR("Received BA when not expected\n");
return -EINVAL;
}
/* Mark that the expected block-ack response arrived */
agg->wait_for_ba = 0;
D_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
/* Calculate shift to align block-ack bits with our Tx win bits */
sh = agg->start_idx - SEQ_TO_IDX(seq_ctl >> 4);
if (sh < 0) /* tbw something is wrong with indices */
sh += 0x100;
if (agg->frame_count > (64 - sh)) {
D_TX_REPLY("more frames than bitmap size");
return -1;
}
/* don't use 64-bit values for now */
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
/* check for success or failure according to the
* transmitted bitmap and block-ack bitmap */
sent_bitmap = bitmap & agg->bitmap;
/* For each frame attempted in aggregation,
* update driver's record of tx frame's status. */
i = 0;
while (sent_bitmap) {
ack = sent_bitmap & 1ULL;
successes += ack;
D_TX_REPLY("%s ON i=%d idx=%d raw=%d\n", ack ? "ACK" : "NACK",
i, (agg->start_idx + i) & 0xff, agg->start_idx + i);
sent_bitmap >>= 1;
++i;
}
D_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
info = IEEE80211_SKB_CB(il->txq[scd_flow].skbs[agg->start_idx]);
memset(&info->status, 0, sizeof(info->status));
info->flags |= IEEE80211_TX_STAT_ACK;
info->flags |= IEEE80211_TX_STAT_AMPDU;
info->status.ampdu_ack_len = successes;
info->status.ampdu_len = agg->frame_count;
il4965_hwrate_to_tx_control(il, agg->rate_n_flags, info);
return 0;
}
static inline bool
il4965_is_tx_success(u32 status)
{
status &= TX_STATUS_MSK;
return (status == TX_STATUS_SUCCESS || status == TX_STATUS_DIRECT_DONE);
}
static u8
il4965_find_station(struct il_priv *il, const u8 *addr)
{
int i;
int start = 0;
int ret = IL_INVALID_STATION;
unsigned long flags;
if (il->iw_mode == NL80211_IFTYPE_ADHOC)
start = IL_STA_ID;
if (is_broadcast_ether_addr(addr))
return il->hw_params.bcast_id;
spin_lock_irqsave(&il->sta_lock, flags);
for (i = start; i < il->hw_params.max_stations; i++)
if (il->stations[i].used &&
ether_addr_equal(il->stations[i].sta.sta.addr, addr)) {
ret = i;
goto out;
}
D_ASSOC("can not find STA %pM total %d\n", addr, il->num_stations);
out:
/*
* It may be possible that more commands interacting with stations
* arrive before we completed processing the adding of
* station
*/
if (ret != IL_INVALID_STATION &&
(!(il->stations[ret].used & IL_STA_UCODE_ACTIVE) ||
(il->stations[ret].used & IL_STA_UCODE_INPROGRESS))) {
IL_ERR("Requested station info for sta %d before ready.\n",
ret);
ret = IL_INVALID_STATION;
}
spin_unlock_irqrestore(&il->sta_lock, flags);
return ret;
}
static int
il4965_get_ra_sta_id(struct il_priv *il, struct ieee80211_hdr *hdr)
{
if (il->iw_mode == NL80211_IFTYPE_STATION)
return IL_AP_ID;
else {
u8 *da = ieee80211_get_DA(hdr);
return il4965_find_station(il, da);
}
}
static inline u32
il4965_get_scd_ssn(struct il4965_tx_resp *tx_resp)
{
return le32_to_cpup(&tx_resp->u.status +
tx_resp->frame_count) & IEEE80211_MAX_SN;
}
static inline u32
il4965_tx_status_to_mac80211(u32 status)
{
status &= TX_STATUS_MSK;
switch (status) {
case TX_STATUS_SUCCESS:
case TX_STATUS_DIRECT_DONE:
return IEEE80211_TX_STAT_ACK;
case TX_STATUS_FAIL_DEST_PS:
return IEEE80211_TX_STAT_TX_FILTERED;
default:
return 0;
}
}
/*
* il4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
*/
static int
il4965_tx_status_reply_tx(struct il_priv *il, struct il_ht_agg *agg,
struct il4965_tx_resp *tx_resp, int txq_id,
u16 start_idx)
{
u16 status;
struct agg_tx_status *frame_status = tx_resp->u.agg_status;
struct ieee80211_tx_info *info = NULL;
struct ieee80211_hdr *hdr = NULL;
u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
int i, sh, idx;
u16 seq;
if (agg->wait_for_ba)
D_TX_REPLY("got tx response w/o block-ack\n");
agg->frame_count = tx_resp->frame_count;
agg->start_idx = start_idx;
agg->rate_n_flags = rate_n_flags;
agg->bitmap = 0;
/* num frames attempted by Tx command */
if (agg->frame_count == 1) {
/* Only one frame was attempted; no block-ack will arrive */
status = le16_to_cpu(frame_status[0].status);
idx = start_idx;
D_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
agg->frame_count, agg->start_idx, idx);
info = IEEE80211_SKB_CB(il->txq[txq_id].skbs[idx]);
info->status.rates[0].count = tx_resp->failure_frame + 1;
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
info->flags |= il4965_tx_status_to_mac80211(status);
il4965_hwrate_to_tx_control(il, rate_n_flags, info);
D_TX_REPLY("1 Frame 0x%x failure :%d\n", status & 0xff,
tx_resp->failure_frame);
D_TX_REPLY("Rate Info rate_n_flags=%x\n", rate_n_flags);
agg->wait_for_ba = 0;
} else {
/* Two or more frames were attempted; expect block-ack */
u64 bitmap = 0;
int start = agg->start_idx;
struct sk_buff *skb;
/* Construct bit-map of pending frames within Tx win */
for (i = 0; i < agg->frame_count; i++) {
u16 sc;
status = le16_to_cpu(frame_status[i].status);
seq = le16_to_cpu(frame_status[i].sequence);
idx = SEQ_TO_IDX(seq);
txq_id = SEQ_TO_QUEUE(seq);
if (status &
(AGG_TX_STATE_FEW_BYTES_MSK |
AGG_TX_STATE_ABORT_MSK))
continue;
D_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
agg->frame_count, txq_id, idx);
skb = il->txq[txq_id].skbs[idx];
if (WARN_ON_ONCE(skb == NULL))
return -1;
hdr = (struct ieee80211_hdr *) skb->data;
sc = le16_to_cpu(hdr->seq_ctrl);
if (idx != (IEEE80211_SEQ_TO_SN(sc) & 0xff)) {
IL_ERR("BUG_ON idx doesn't match seq control"
" idx=%d, seq_idx=%d, seq=%d\n", idx,
IEEE80211_SEQ_TO_SN(sc), hdr->seq_ctrl);
return -1;
}
D_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n", i, idx,
IEEE80211_SEQ_TO_SN(sc));
sh = idx - start;
if (sh > 64) {
sh = (start - idx) + 0xff;
bitmap = bitmap << sh;
sh = 0;
start = idx;
} else if (sh < -64)
sh = 0xff - (start - idx);
else if (sh < 0) {
sh = start - idx;
start = idx;
bitmap = bitmap << sh;
sh = 0;
}
bitmap |= 1ULL << sh;
D_TX_REPLY("start=%d bitmap=0x%llx\n", start,
(unsigned long long)bitmap);
}
agg->bitmap = bitmap;
agg->start_idx = start;
D_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
agg->frame_count, agg->start_idx,
(unsigned long long)agg->bitmap);
if (bitmap)
agg->wait_for_ba = 1;
}
return 0;
}
/*
* il4965_hdl_tx - Handle standard (non-aggregation) Tx response
*/
static void
il4965_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
u16 sequence = le16_to_cpu(pkt->hdr.sequence);
int txq_id = SEQ_TO_QUEUE(sequence);
int idx = SEQ_TO_IDX(sequence);
struct il_tx_queue *txq = &il->txq[txq_id];
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *info;
struct il4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
u32 status = le32_to_cpu(tx_resp->u.status);
int tid;
int sta_id;
int freed;
u8 *qc = NULL;
unsigned long flags;
if (idx >= txq->q.n_bd || il_queue_used(&txq->q, idx) == 0) {
IL_ERR("Read idx for DMA queue txq_id (%d) idx %d "
"is out of range [0-%d] %d %d\n", txq_id, idx,
txq->q.n_bd, txq->q.write_ptr, txq->q.read_ptr);
return;
}
txq->time_stamp = jiffies;
skb = txq->skbs[txq->q.read_ptr];
info = IEEE80211_SKB_CB(skb);
memset(&info->status, 0, sizeof(info->status));
hdr = (struct ieee80211_hdr *) skb->data;
if (ieee80211_is_data_qos(hdr->frame_control)) {
qc = ieee80211_get_qos_ctl(hdr);
tid = qc[0] & 0xf;
}
sta_id = il4965_get_ra_sta_id(il, hdr);
if (txq->sched_retry && unlikely(sta_id == IL_INVALID_STATION)) {
IL_ERR("Station not known\n");
return;
}
/*
* Firmware will not transmit frame on passive channel, if it not yet
* received some valid frame on that channel. When this error happen
* we have to wait until firmware will unblock itself i.e. when we
* note received beacon or other frame. We unblock queues in
* il4965_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
*/
if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
il->iw_mode == NL80211_IFTYPE_STATION) {
il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
D_INFO("Stopped queues - RX waiting on passive channel\n");
}
spin_lock_irqsave(&il->sta_lock, flags);
if (txq->sched_retry) {
const u32 scd_ssn = il4965_get_scd_ssn(tx_resp);
struct il_ht_agg *agg;
if (WARN_ON(!qc))
goto out;
agg = &il->stations[sta_id].tid[tid].agg;
il4965_tx_status_reply_tx(il, agg, tx_resp, txq_id, idx);
/* check if BAR is needed */
if (tx_resp->frame_count == 1 &&
!il4965_is_tx_success(status))
info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
if (txq->q.read_ptr != (scd_ssn & 0xff)) {
idx = il_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
D_TX_REPLY("Retry scheduler reclaim scd_ssn "
"%d idx %d\n", scd_ssn, idx);
freed = il4965_tx_queue_reclaim(il, txq_id, idx);
il4965_free_tfds_in_queue(il, sta_id, tid, freed);
if (il->mac80211_registered &&
il_queue_space(&txq->q) > txq->q.low_mark &&
agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
il_wake_queue(il, txq);
}
} else {
info->status.rates[0].count = tx_resp->failure_frame + 1;
info->flags |= il4965_tx_status_to_mac80211(status);
il4965_hwrate_to_tx_control(il,
le32_to_cpu(tx_resp->rate_n_flags),
info);
D_TX_REPLY("TXQ %d status %s (0x%08x) "
"rate_n_flags 0x%x retries %d\n", txq_id,
il4965_get_tx_fail_reason(status), status,
le32_to_cpu(tx_resp->rate_n_flags),
tx_resp->failure_frame);
freed = il4965_tx_queue_reclaim(il, txq_id, idx);
if (qc && likely(sta_id != IL_INVALID_STATION))
il4965_free_tfds_in_queue(il, sta_id, tid, freed);
else if (sta_id == IL_INVALID_STATION)
D_TX_REPLY("Station not known\n");
if (il->mac80211_registered &&
il_queue_space(&txq->q) > txq->q.low_mark)
il_wake_queue(il, txq);
}
out:
if (qc && likely(sta_id != IL_INVALID_STATION))
il4965_txq_check_empty(il, sta_id, tid, txq_id);
il4965_check_abort_status(il, tx_resp->frame_count, status);
spin_unlock_irqrestore(&il->sta_lock, flags);
}
/*
* translate ucode response to mac80211 tx status control values
*/
void
il4965_hwrate_to_tx_control(struct il_priv *il, u32 rate_n_flags,
struct ieee80211_tx_info *info)
{
struct ieee80211_tx_rate *r = &info->status.rates[0];
info->status.antenna =
((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
if (rate_n_flags & RATE_MCS_HT_MSK)
r->flags |= IEEE80211_TX_RC_MCS;
if (rate_n_flags & RATE_MCS_GF_MSK)
r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
if (rate_n_flags & RATE_MCS_HT40_MSK)
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
if (rate_n_flags & RATE_MCS_DUP_MSK)
r->flags |= IEEE80211_TX_RC_DUP_DATA;
if (rate_n_flags & RATE_MCS_SGI_MSK)
r->flags |= IEEE80211_TX_RC_SHORT_GI;
r->idx = il4965_hwrate_to_mac80211_idx(rate_n_flags, info->band);
}
/*
* il4965_hdl_compressed_ba - Handler for N_COMPRESSED_BA
*
* Handles block-acknowledge notification from device, which reports success
* of frames sent via aggregation.
*/
static void
il4965_hdl_compressed_ba(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
struct il_tx_queue *txq = NULL;
struct il_ht_agg *agg;
int idx;
int sta_id;
int tid;
unsigned long flags;
/* "flow" corresponds to Tx queue */
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
/* "ssn" is start of block-ack Tx win, corresponds to idx
* (in Tx queue's circular buffer) of first TFD/frame in win */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
if (scd_flow >= il->hw_params.max_txq_num) {
IL_ERR("BUG_ON scd_flow is bigger than number of queues\n");
return;
}
txq = &il->txq[scd_flow];
sta_id = ba_resp->sta_id;
tid = ba_resp->tid;
agg = &il->stations[sta_id].tid[tid].agg;
if (unlikely(agg->txq_id != scd_flow)) {
/*
* FIXME: this is a uCode bug which need to be addressed,
* log the information and return for now!
* since it is possible happen very often and in order
* not to fill the syslog, don't enable the logging by default
*/
D_TX_REPLY("BA scd_flow %d does not match txq_id %d\n",
scd_flow, agg->txq_id);
return;
}
/* Find idx just before block-ack win */
idx = il_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
spin_lock_irqsave(&il->sta_lock, flags);
D_TX_REPLY("N_COMPRESSED_BA [%d] Received from %pM, " "sta_id = %d\n",
agg->wait_for_ba, (u8 *) &ba_resp->sta_addr_lo32,
ba_resp->sta_id);
D_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx," "scd_flow = "
"%d, scd_ssn = %d\n", ba_resp->tid, ba_resp->seq_ctl,
(unsigned long long)le64_to_cpu(ba_resp->bitmap),
ba_resp->scd_flow, ba_resp->scd_ssn);
D_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx\n", agg->start_idx,
(unsigned long long)agg->bitmap);
/* Update driver's record of ACK vs. not for each frame in win */
il4965_tx_status_reply_compressed_ba(il, agg, ba_resp);
/* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack win (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)) {
/* calculate mac80211 ampdu sw queue to wake */
int freed = il4965_tx_queue_reclaim(il, scd_flow, idx);
il4965_free_tfds_in_queue(il, sta_id, tid, freed);
if (il_queue_space(&txq->q) > txq->q.low_mark &&
il->mac80211_registered &&
agg->state != IL_EMPTYING_HW_QUEUE_DELBA)
il_wake_queue(il, txq);
il4965_txq_check_empty(il, sta_id, tid, scd_flow);
}
spin_unlock_irqrestore(&il->sta_lock, flags);
}
#ifdef CONFIG_IWLEGACY_DEBUG
const char *
il4965_get_tx_fail_reason(u32 status)
{
#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
return "SUCCESS";
TX_STATUS_POSTPONE(DELAY);
TX_STATUS_POSTPONE(FEW_BYTES);
TX_STATUS_POSTPONE(QUIET_PERIOD);
TX_STATUS_POSTPONE(CALC_TTAK);
TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
TX_STATUS_FAIL(SHORT_LIMIT);
TX_STATUS_FAIL(LONG_LIMIT);
TX_STATUS_FAIL(FIFO_UNDERRUN);
TX_STATUS_FAIL(DRAIN_FLOW);
TX_STATUS_FAIL(RFKILL_FLUSH);
TX_STATUS_FAIL(LIFE_EXPIRE);
TX_STATUS_FAIL(DEST_PS);
TX_STATUS_FAIL(HOST_ABORTED);
TX_STATUS_FAIL(BT_RETRY);
TX_STATUS_FAIL(STA_INVALID);
TX_STATUS_FAIL(FRAG_DROPPED);
TX_STATUS_FAIL(TID_DISABLE);
TX_STATUS_FAIL(FIFO_FLUSHED);
TX_STATUS_FAIL(INSUFFICIENT_CF_POLL);
TX_STATUS_FAIL(PASSIVE_NO_RX);
TX_STATUS_FAIL(NO_BEACON_ON_RADAR);
}
return "UNKNOWN";
#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CONFIG_IWLEGACY_DEBUG */
static struct il_link_quality_cmd *
il4965_sta_alloc_lq(struct il_priv *il, u8 sta_id)
{
int i, r;
struct il_link_quality_cmd *link_cmd;
u32 rate_flags = 0;
__le32 rate_n_flags;
link_cmd = kzalloc(sizeof(struct il_link_quality_cmd), GFP_KERNEL);
if (!link_cmd) {
IL_ERR("Unable to allocate memory for LQ cmd.\n");
return NULL;
}
/* 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 (il->band == NL80211_BAND_5GHZ)
r = RATE_6M_IDX;
else
r = RATE_1M_IDX;
if (r >= IL_FIRST_CCK_RATE && r <= IL_LAST_CCK_RATE)
rate_flags |= RATE_MCS_CCK_MSK;
rate_flags |=
il4965_first_antenna(il->hw_params.
valid_tx_ant) << RATE_MCS_ANT_POS;
rate_n_flags = cpu_to_le32(il_rates[r].plcp | rate_flags);
for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
link_cmd->general_params.single_stream_ant_msk =
il4965_first_antenna(il->hw_params.valid_tx_ant);
link_cmd->general_params.dual_stream_ant_msk =
il->hw_params.valid_tx_ant & ~il4965_first_antenna(il->hw_params.
valid_tx_ant);
if (!link_cmd->general_params.dual_stream_ant_msk) {
link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
} else if (il4965_num_of_ant(il->hw_params.valid_tx_ant) == 2) {
link_cmd->general_params.dual_stream_ant_msk =
il->hw_params.valid_tx_ant;
}
link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
link_cmd->agg_params.agg_time_limit =
cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
link_cmd->sta_id = sta_id;
return link_cmd;
}
/*
* il4965_add_bssid_station - Add the special IBSS BSSID station
*
* Function sleeps.
*/
int
il4965_add_bssid_station(struct il_priv *il, const u8 *addr, u8 *sta_id_r)
{
int ret;
u8 sta_id;
struct il_link_quality_cmd *link_cmd;
unsigned long flags;
if (sta_id_r)
*sta_id_r = IL_INVALID_STATION;
ret = il_add_station_common(il, addr, 0, NULL, &sta_id);
if (ret) {
IL_ERR("Unable to add station %pM\n", addr);
return ret;
}
if (sta_id_r)
*sta_id_r = sta_id;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].used |= IL_STA_LOCAL;
spin_unlock_irqrestore(&il->sta_lock, flags);
/* Set up default rate scaling table in device's station table */
link_cmd = il4965_sta_alloc_lq(il, sta_id);
if (!link_cmd) {
IL_ERR("Unable to initialize rate scaling for station %pM.\n",
addr);
return -ENOMEM;
}
ret = il_send_lq_cmd(il, link_cmd, CMD_SYNC, true);
if (ret)
IL_ERR("Link quality command failed (%d)\n", ret);
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
static int
il4965_static_wepkey_cmd(struct il_priv *il, bool send_if_empty)
{
int i;
u8 buff[sizeof(struct il_wep_cmd) +
sizeof(struct il_wep_key) * WEP_KEYS_MAX];
struct il_wep_cmd *wep_cmd = (struct il_wep_cmd *)buff;
size_t cmd_size = sizeof(struct il_wep_cmd);
struct il_host_cmd cmd = {
.id = C_WEPKEY,
.data = wep_cmd,
.flags = CMD_SYNC,
};
bool not_empty = false;
might_sleep();
memset(wep_cmd, 0,
cmd_size + (sizeof(struct il_wep_key) * WEP_KEYS_MAX));
for (i = 0; i < WEP_KEYS_MAX; i++) {
u8 key_size = il->_4965.wep_keys[i].key_size;
wep_cmd->key[i].key_idx = i;
if (key_size) {
wep_cmd->key[i].key_offset = i;
not_empty = true;
} else
wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
wep_cmd->key[i].key_size = key_size;
memcpy(&wep_cmd->key[i].key[3], il->_4965.wep_keys[i].key, key_size);
}
wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
wep_cmd->num_keys = WEP_KEYS_MAX;
cmd_size += sizeof(struct il_wep_key) * WEP_KEYS_MAX;
cmd.len = cmd_size;
if (not_empty || send_if_empty)
return il_send_cmd(il, &cmd);
else
return 0;
}
int
il4965_restore_default_wep_keys(struct il_priv *il)
{
lockdep_assert_held(&il->mutex);
return il4965_static_wepkey_cmd(il, false);
}
int
il4965_remove_default_wep_key(struct il_priv *il,
struct ieee80211_key_conf *keyconf)
{
int ret;
int idx = keyconf->keyidx;
lockdep_assert_held(&il->mutex);
D_WEP("Removing default WEP key: idx=%d\n", idx);
memset(&il->_4965.wep_keys[idx], 0, sizeof(struct il_wep_key));
if (il_is_rfkill(il)) {
D_WEP("Not sending C_WEPKEY command due to RFKILL.\n");
/* but keys in device are clear anyway so return success */
return 0;
}
ret = il4965_static_wepkey_cmd(il, 1);
D_WEP("Remove default WEP key: idx=%d ret=%d\n", idx, ret);
return ret;
}
int
il4965_set_default_wep_key(struct il_priv *il,
struct ieee80211_key_conf *keyconf)
{
int ret;
int len = keyconf->keylen;
int idx = keyconf->keyidx;
lockdep_assert_held(&il->mutex);
if (len != WEP_KEY_LEN_128 && len != WEP_KEY_LEN_64) {
D_WEP("Bad WEP key length %d\n", keyconf->keylen);
return -EINVAL;
}
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->hw_key_idx = HW_KEY_DEFAULT;
il->stations[IL_AP_ID].keyinfo.cipher = keyconf->cipher;
il->_4965.wep_keys[idx].key_size = len;
memcpy(&il->_4965.wep_keys[idx].key, &keyconf->key, len);
ret = il4965_static_wepkey_cmd(il, false);
D_WEP("Set default WEP key: len=%d idx=%d ret=%d\n", len, idx, ret);
return ret;
}
static int
il4965_set_wep_dynamic_key_info(struct il_priv *il,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (keyconf->keylen == WEP_KEY_LEN_128)
key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
if (sta_id == il->hw_params.bcast_id)
key_flags |= STA_KEY_MULTICAST_MSK;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
il->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;
memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
memcpy(&il->stations[sta_id].sta.key.key[3], keyconf->key,
keyconf->keylen);
if ((il->stations[sta_id].sta.key.
key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
il->stations[sta_id].sta.key.key_offset =
il_get_free_ucode_key_idx(il);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
"no space for a new key");
il->stations[sta_id].sta.key.key_flags = key_flags;
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
static int
il4965_set_ccmp_dynamic_key_info(struct il_priv *il,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (sta_id == il->hw_params.bcast_id)
key_flags |= STA_KEY_MULTICAST_MSK;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
il->stations[sta_id].keyinfo.keylen = keyconf->keylen;
memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, keyconf->keylen);
memcpy(il->stations[sta_id].sta.key.key, keyconf->key, keyconf->keylen);
if ((il->stations[sta_id].sta.key.
key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
il->stations[sta_id].sta.key.key_offset =
il_get_free_ucode_key_idx(il);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
"no space for a new key");
il->stations[sta_id].sta.key.key_flags = key_flags;
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
static int
il4965_set_tkip_dynamic_key_info(struct il_priv *il,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
unsigned long flags;
__le16 key_flags = 0;
key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
key_flags &= ~STA_KEY_FLG_INVALID;
if (sta_id == il->hw_params.bcast_id)
key_flags |= STA_KEY_MULTICAST_MSK;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].keyinfo.cipher = keyconf->cipher;
il->stations[sta_id].keyinfo.keylen = 16;
if ((il->stations[sta_id].sta.key.
key_flags & STA_KEY_FLG_ENCRYPT_MSK) == STA_KEY_FLG_NO_ENC)
il->stations[sta_id].sta.key.key_offset =
il_get_free_ucode_key_idx(il);
/* else, we are overriding an existing key => no need to allocated room
* in uCode. */
WARN(il->stations[sta_id].sta.key.key_offset == WEP_INVALID_OFFSET,
"no space for a new key");
il->stations[sta_id].sta.key.key_flags = key_flags;
/* This copy is acutally not needed: we get the key with each TX */
memcpy(il->stations[sta_id].keyinfo.key, keyconf->key, 16);
memcpy(il->stations[sta_id].sta.key.key, keyconf->key, 16);
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
void
il4965_update_tkip_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
{
u8 sta_id;
unsigned long flags;
int i;
if (il_scan_cancel(il)) {
/* cancel scan failed, just live w/ bad key and rely
briefly on SW decryption */
return;
}
sta_id = il_sta_id_or_broadcast(il, sta);
if (sta_id == IL_INVALID_STATION)
return;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
for (i = 0; i < 5; i++)
il->stations[sta_id].sta.key.tkip_rx_ttak[i] =
cpu_to_le16(phase1key[i]);
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&il->sta_lock, flags);
}
int
il4965_remove_dynamic_key(struct il_priv *il,
struct ieee80211_key_conf *keyconf, u8 sta_id)
{
unsigned long flags;
u16 key_flags;
u8 keyidx;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
il->_4965.key_mapping_keys--;
spin_lock_irqsave(&il->sta_lock, flags);
key_flags = le16_to_cpu(il->stations[sta_id].sta.key.key_flags);
keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;
D_WEP("Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id);
if (keyconf->keyidx != keyidx) {
/* We need to remove a key with idx different that the one
* in the uCode. This means that the key we need to remove has
* been replaced by another one with different idx.
* Don't do anything and return ok
*/
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
if (il->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_INVALID) {
IL_WARN("Removing wrong key %d 0x%x\n", keyconf->keyidx,
key_flags);
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
if (!test_and_clear_bit
(il->stations[sta_id].sta.key.key_offset, &il->ucode_key_table))
IL_ERR("idx %d not used in uCode key table.\n",
il->stations[sta_id].sta.key.key_offset);
memset(&il->stations[sta_id].keyinfo, 0, sizeof(struct il_hw_key));
memset(&il->stations[sta_id].sta.key, 0, sizeof(struct il4965_keyinfo));
il->stations[sta_id].sta.key.key_flags =
STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
il->stations[sta_id].sta.key.key_offset = keyconf->hw_key_idx;
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
if (il_is_rfkill(il)) {
D_WEP
("Not sending C_ADD_STA command because RFKILL enabled.\n");
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
int
il4965_set_dynamic_key(struct il_priv *il, struct ieee80211_key_conf *keyconf,
u8 sta_id)
{
int ret;
lockdep_assert_held(&il->mutex);
il->_4965.key_mapping_keys++;
keyconf->hw_key_idx = HW_KEY_DYNAMIC;
switch (keyconf->cipher) {
case WLAN_CIPHER_SUITE_CCMP:
ret =
il4965_set_ccmp_dynamic_key_info(il, keyconf, sta_id);
break;
case WLAN_CIPHER_SUITE_TKIP:
ret =
il4965_set_tkip_dynamic_key_info(il, keyconf, sta_id);
break;
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
ret = il4965_set_wep_dynamic_key_info(il, keyconf, sta_id);
break;
default:
IL_ERR("Unknown alg: %s cipher = %x\n", __func__,
keyconf->cipher);
ret = -EINVAL;
}
D_WEP("Set dynamic key: cipher=%x len=%d idx=%d sta=%d ret=%d\n",
keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta_id, ret);
return ret;
}
/*
* il4965_alloc_bcast_station - add broadcast station into driver's station table.
*
* This adds the broadcast station into the driver's station table
* and marks it driver active, so that it will be restored to the
* device at the next best time.
*/
int
il4965_alloc_bcast_station(struct il_priv *il)
{
struct il_link_quality_cmd *link_cmd;
unsigned long flags;
u8 sta_id;
spin_lock_irqsave(&il->sta_lock, flags);
sta_id = il_prep_station(il, il_bcast_addr, false, NULL);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Unable to prepare broadcast station\n");
spin_unlock_irqrestore(&il->sta_lock, flags);
return -EINVAL;
}
il->stations[sta_id].used |= IL_STA_DRIVER_ACTIVE;
il->stations[sta_id].used |= IL_STA_BCAST;
spin_unlock_irqrestore(&il->sta_lock, flags);
link_cmd = il4965_sta_alloc_lq(il, sta_id);
if (!link_cmd) {
IL_ERR
("Unable to initialize rate scaling for bcast station.\n");
return -ENOMEM;
}
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
/*
* il4965_update_bcast_station - update broadcast station's LQ command
*
* Only used by iwl4965. Placed here to have all bcast station management
* code together.
*/
static int
il4965_update_bcast_station(struct il_priv *il)
{
unsigned long flags;
struct il_link_quality_cmd *link_cmd;
u8 sta_id = il->hw_params.bcast_id;
link_cmd = il4965_sta_alloc_lq(il, sta_id);
if (!link_cmd) {
IL_ERR("Unable to initialize rate scaling for bcast sta.\n");
return -ENOMEM;
}
spin_lock_irqsave(&il->sta_lock, flags);
if (il->stations[sta_id].lq)
kfree(il->stations[sta_id].lq);
else
D_INFO("Bcast sta rate scaling has not been initialized.\n");
il->stations[sta_id].lq = link_cmd;
spin_unlock_irqrestore(&il->sta_lock, flags);
return 0;
}
int
il4965_update_bcast_stations(struct il_priv *il)
{
return il4965_update_bcast_station(il);
}
/*
* il4965_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
*/
int
il4965_sta_tx_modify_enable_tid(struct il_priv *il, int sta_id, int tid)
{
unsigned long flags;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
/* Remove "disable" flag, to enable Tx for this TID */
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
il->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
int
il4965_sta_rx_agg_start(struct il_priv *il, struct ieee80211_sta *sta, int tid,
u16 ssn)
{
unsigned long flags;
int sta_id;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION)
return -ENXIO;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].sta.station_flags_msk = 0;
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
il->stations[sta_id].sta.add_immediate_ba_tid = (u8) tid;
il->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
int
il4965_sta_rx_agg_stop(struct il_priv *il, struct ieee80211_sta *sta, int tid)
{
unsigned long flags;
int sta_id;
struct il_addsta_cmd sta_cmd;
lockdep_assert_held(&il->mutex);
sta_id = il_sta_id(sta);
if (sta_id == IL_INVALID_STATION) {
IL_ERR("Invalid station for AGG tid %d\n", tid);
return -ENXIO;
}
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].sta.station_flags_msk = 0;
il->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
il->stations[sta_id].sta.remove_immediate_ba_tid = (u8) tid;
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
memcpy(&sta_cmd, &il->stations[sta_id].sta,
sizeof(struct il_addsta_cmd));
spin_unlock_irqrestore(&il->sta_lock, flags);
return il_send_add_sta(il, &sta_cmd, CMD_SYNC);
}
void
il4965_sta_modify_sleep_tx_count(struct il_priv *il, int sta_id, int cnt)
{
unsigned long flags;
spin_lock_irqsave(&il->sta_lock, flags);
il->stations[sta_id].sta.station_flags |= STA_FLG_PWR_SAVE_MSK;
il->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
il->stations[sta_id].sta.sta.modify_mask =
STA_MODIFY_SLEEP_TX_COUNT_MSK;
il->stations[sta_id].sta.sleep_tx_count = cpu_to_le16(cnt);
il->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
il_send_add_sta(il, &il->stations[sta_id].sta, CMD_ASYNC);
spin_unlock_irqrestore(&il->sta_lock, flags);
}
void
il4965_update_chain_flags(struct il_priv *il)
{
if (il->ops->set_rxon_chain) {
il->ops->set_rxon_chain(il);
if (il->active.rx_chain != il->staging.rx_chain)
il_commit_rxon(il);
}
}
static void
il4965_clear_free_frames(struct il_priv *il)
{
struct list_head *element;
D_INFO("%d frames on pre-allocated heap on clear.\n", il->frames_count);
while (!list_empty(&il->free_frames)) {
element = il->free_frames.next;
list_del(element);
kfree(list_entry(element, struct il_frame, list));
il->frames_count--;
}
if (il->frames_count) {
IL_WARN("%d frames still in use. Did we lose one?\n",
il->frames_count);
il->frames_count = 0;
}
}
static struct il_frame *
il4965_get_free_frame(struct il_priv *il)
{
struct il_frame *frame;
struct list_head *element;
if (list_empty(&il->free_frames)) {
frame = kzalloc(sizeof(*frame), GFP_KERNEL);
if (!frame) {
IL_ERR("Could not allocate frame!\n");
return NULL;
}
il->frames_count++;
return frame;
}
element = il->free_frames.next;
list_del(element);
return list_entry(element, struct il_frame, list);
}
static void
il4965_free_frame(struct il_priv *il, struct il_frame *frame)
{
memset(frame, 0, sizeof(*frame));
list_add(&frame->list, &il->free_frames);
}
static u32
il4965_fill_beacon_frame(struct il_priv *il, struct ieee80211_hdr *hdr,
int left)
{
lockdep_assert_held(&il->mutex);
if (!il->beacon_skb)
return 0;
if (il->beacon_skb->len > left)
return 0;
memcpy(hdr, il->beacon_skb->data, il->beacon_skb->len);
return il->beacon_skb->len;
}
/* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
static void
il4965_set_beacon_tim(struct il_priv *il,
struct il_tx_beacon_cmd *tx_beacon_cmd, u8 * beacon,
u32 frame_size)
{
u16 tim_idx;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
/*
* The idx is relative to frame start but we start looking at the
* variable-length part of the beacon.
*/
tim_idx = mgmt->u.beacon.variable - beacon;
/* Parse variable-length elements of beacon to find WLAN_EID_TIM */
while ((tim_idx < (frame_size - 2)) &&
(beacon[tim_idx] != WLAN_EID_TIM))
tim_idx += beacon[tim_idx + 1] + 2;
/* If TIM field was found, set variables */
if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
tx_beacon_cmd->tim_size = beacon[tim_idx + 1];
} else
IL_WARN("Unable to find TIM Element in beacon\n");
}
static unsigned int
il4965_hw_get_beacon_cmd(struct il_priv *il, struct il_frame *frame)
{
struct il_tx_beacon_cmd *tx_beacon_cmd;
u32 frame_size;
u32 rate_flags;
u32 rate;
/*
* We have to set up the TX command, the TX Beacon command, and the
* beacon contents.
*/
lockdep_assert_held(&il->mutex);
if (!il->beacon_enabled) {
IL_ERR("Trying to build beacon without beaconing enabled\n");
return 0;
}
/* Initialize memory */
tx_beacon_cmd = &frame->u.beacon;
memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
/* Set up TX beacon contents */
frame_size =
il4965_fill_beacon_frame(il, tx_beacon_cmd->frame,
sizeof(frame->u) - sizeof(*tx_beacon_cmd));
if (WARN_ON_ONCE(frame_size > MAX_MPDU_SIZE))
return 0;
if (!frame_size)
return 0;
/* Set up TX command fields */
tx_beacon_cmd->tx.len = cpu_to_le16((u16) frame_size);
tx_beacon_cmd->tx.sta_id = il->hw_params.bcast_id;
tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
tx_beacon_cmd->tx.tx_flags =
TX_CMD_FLG_SEQ_CTL_MSK | TX_CMD_FLG_TSF_MSK |
TX_CMD_FLG_STA_RATE_MSK;
/* Set up TX beacon command fields */
il4965_set_beacon_tim(il, tx_beacon_cmd, (u8 *) tx_beacon_cmd->frame,
frame_size);
/* Set up packet rate and flags */
rate = il_get_lowest_plcp(il);
il4965_toggle_tx_ant(il, &il->mgmt_tx_ant, il->hw_params.valid_tx_ant);
rate_flags = BIT(il->mgmt_tx_ant) << RATE_MCS_ANT_POS;
if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
rate_flags |= RATE_MCS_CCK_MSK;
tx_beacon_cmd->tx.rate_n_flags = cpu_to_le32(rate | rate_flags);
return sizeof(*tx_beacon_cmd) + frame_size;
}
int
il4965_send_beacon_cmd(struct il_priv *il)
{
struct il_frame *frame;
unsigned int frame_size;
int rc;
frame = il4965_get_free_frame(il);
if (!frame) {
IL_ERR("Could not obtain free frame buffer for beacon "
"command.\n");
return -ENOMEM;
}
frame_size = il4965_hw_get_beacon_cmd(il, frame);
if (!frame_size) {
IL_ERR("Error configuring the beacon command\n");
il4965_free_frame(il, frame);
return -EINVAL;
}
rc = il_send_cmd_pdu(il, C_TX_BEACON, frame_size, &frame->u.cmd[0]);
il4965_free_frame(il, frame);
return rc;
}
static inline dma_addr_t
il4965_tfd_tb_get_addr(struct il_tfd *tfd, u8 idx)
{
struct il_tfd_tb *tb = &tfd->tbs[idx];
dma_addr_t addr = get_unaligned_le32(&tb->lo);
if (sizeof(dma_addr_t) > sizeof(u32))
addr |=
((dma_addr_t) (le16_to_cpu(tb->hi_n_len) & 0xF) << 16) <<
16;
return addr;
}
static inline u16
il4965_tfd_tb_get_len(struct il_tfd *tfd, u8 idx)
{
struct il_tfd_tb *tb = &tfd->tbs[idx];
return le16_to_cpu(tb->hi_n_len) >> 4;
}
static inline void
il4965_tfd_set_tb(struct il_tfd *tfd, u8 idx, dma_addr_t addr, u16 len)
{
struct il_tfd_tb *tb = &tfd->tbs[idx];
u16 hi_n_len = len << 4;
put_unaligned_le32(addr, &tb->lo);
if (sizeof(dma_addr_t) > sizeof(u32))
hi_n_len |= ((addr >> 16) >> 16) & 0xF;
tb->hi_n_len = cpu_to_le16(hi_n_len);
tfd->num_tbs = idx + 1;
}
static inline u8
il4965_tfd_get_num_tbs(struct il_tfd *tfd)
{
return tfd->num_tbs & 0x1f;
}
/*
* il4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
*
* Does NOT advance any TFD circular buffer read/write idxes
* Does NOT free the TFD itself (which is within circular buffer)
*/
void
il4965_hw_txq_free_tfd(struct il_priv *il, struct il_tx_queue *txq)
{
struct il_tfd *tfd_tmp = (struct il_tfd *)txq->tfds;
struct il_tfd *tfd;
struct pci_dev *dev = il->pci_dev;
int idx = txq->q.read_ptr;
int i;
int num_tbs;
tfd = &tfd_tmp[idx];
/* Sanity check on number of chunks */
num_tbs = il4965_tfd_get_num_tbs(tfd);
if (num_tbs >= IL_NUM_OF_TBS) {
IL_ERR("Too many chunks: %i\n", num_tbs);
/* @todo issue fatal error, it is quite serious situation */
return;
}
/* Unmap tx_cmd */
if (num_tbs)
dma_unmap_single(&dev->dev,
dma_unmap_addr(&txq->meta[idx], mapping),
dma_unmap_len(&txq->meta[idx], len),
DMA_BIDIRECTIONAL);
/* Unmap chunks, if any. */
for (i = 1; i < num_tbs; i++)
dma_unmap_single(&dev->dev, il4965_tfd_tb_get_addr(tfd, i),
il4965_tfd_tb_get_len(tfd, i), DMA_TO_DEVICE);
/* free SKB */
if (txq->skbs) {
struct sk_buff *skb = txq->skbs[txq->q.read_ptr];
/* can be called from irqs-disabled context */
if (skb) {
dev_kfree_skb_any(skb);
txq->skbs[txq->q.read_ptr] = NULL;
}
}
}
int
il4965_hw_txq_attach_buf_to_tfd(struct il_priv *il, struct il_tx_queue *txq,
dma_addr_t addr, u16 len, u8 reset, u8 pad)
{
struct il_queue *q;
struct il_tfd *tfd, *tfd_tmp;
u32 num_tbs;
q = &txq->q;
tfd_tmp = (struct il_tfd *)txq->tfds;
tfd = &tfd_tmp[q->write_ptr];
if (reset)
memset(tfd, 0, sizeof(*tfd));
num_tbs = il4965_tfd_get_num_tbs(tfd);
/* Each TFD can point to a maximum 20 Tx buffers */
if (num_tbs >= IL_NUM_OF_TBS) {
IL_ERR("Error can not send more than %d chunks\n",
IL_NUM_OF_TBS);
return -EINVAL;
}
BUG_ON(addr & ~DMA_BIT_MASK(36));
if (unlikely(addr & ~IL_TX_DMA_MASK))
IL_ERR("Unaligned address = %llx\n", (unsigned long long)addr);
il4965_tfd_set_tb(tfd, num_tbs, addr, len);
return 0;
}
/*
* Tell nic 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
il4965_hw_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq)
{
int txq_id = txq->q.id;
/* Circular buffer (TFD queue in DRAM) physical base address */
il_wr(il, FH49_MEM_CBBC_QUEUE(txq_id), txq->q.dma_addr >> 8);
return 0;
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
static void
il4965_hdl_alive(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il_alive_resp *palive;
struct delayed_work *pwork;
palive = &pkt->u.alive_frame;
D_INFO("Alive ucode status 0x%08X revision " "0x%01X 0x%01X\n",
palive->is_valid, palive->ver_type, palive->ver_subtype);
if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
D_INFO("Initialization Alive received.\n");
memcpy(&il->card_alive_init, &pkt->u.raw,
sizeof(struct il_init_alive_resp));
pwork = &il->init_alive_start;
} else {
D_INFO("Runtime Alive received.\n");
memcpy(&il->card_alive, &pkt->u.alive_frame,
sizeof(struct il_alive_resp));
pwork = &il->alive_start;
}
/* We delay the ALIVE response by 5ms to
* give the HW RF Kill time to activate... */
if (palive->is_valid == UCODE_VALID_OK)
queue_delayed_work(il->workqueue, pwork, msecs_to_jiffies(5));
else
IL_WARN("uCode did not respond OK.\n");
}
/*
* il4965_bg_stats_periodic - Timer callback to queue stats
*
* This callback is provided in order to send a stats request.
*
* This timer function is continually reset to execute within
* 60 seconds since the last N_STATS was received. We need to
* ensure we receive the stats in order to update the temperature
* used for calibrating the TXPOWER.
*/
static void
il4965_bg_stats_periodic(struct timer_list *t)
{
struct il_priv *il = from_timer(il, t, stats_periodic);
if (test_bit(S_EXIT_PENDING, &il->status))
return;
/* dont send host command if rf-kill is on */
if (!il_is_ready_rf(il))
return;
il_send_stats_request(il, CMD_ASYNC, false);
}
static void
il4965_hdl_beacon(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
struct il4965_beacon_notif *beacon =
(struct il4965_beacon_notif *)pkt->u.raw;
#ifdef CONFIG_IWLEGACY_DEBUG
u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
D_RX("beacon status %x retries %d iss %d tsf:0x%.8x%.8x rate %d\n",
le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
beacon->beacon_notify_hdr.failure_frame,
le32_to_cpu(beacon->ibss_mgr_status),
le32_to_cpu(beacon->high_tsf), le32_to_cpu(beacon->low_tsf), rate);
#endif
il->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
}
static void
il4965_perform_ct_kill_task(struct il_priv *il)
{
unsigned long flags;
D_POWER("Stop all queues\n");
if (il->mac80211_registered)
ieee80211_stop_queues(il->hw);
_il_wr(il, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
_il_rd(il, CSR_UCODE_DRV_GP1);
spin_lock_irqsave(&il->reg_lock, flags);
if (likely(_il_grab_nic_access(il)))
_il_release_nic_access(il);
spin_unlock_irqrestore(&il->reg_lock, flags);
}
/* Handle notification from uCode that card's power state is changing
* due to software, hardware, or critical temperature RFKILL */
static void
il4965_hdl_card_state(struct il_priv *il, struct il_rx_buf *rxb)
{
struct il_rx_pkt *pkt = rxb_addr(rxb);
u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
unsigned long status = il->status;
D_RF_KILL("Card state received: HW:%s SW:%s CT:%s\n",
(flags & HW_CARD_DISABLED) ? "Kill" : "On",
(flags & SW_CARD_DISABLED) ? "Kill" : "On",
(flags & CT_CARD_DISABLED) ? "Reached" : "Not reached");
if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | CT_CARD_DISABLED)) {
_il_wr(il, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
il_wr(il, HBUS_TARG_MBX_C, HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
if (!(flags & RXON_CARD_DISABLED)) {
_il_wr(il, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
il_wr(il, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
}
}
if (flags & CT_CARD_DISABLED)
il4965_perform_ct_kill_task(il);
if (flags & HW_CARD_DISABLED)
set_bit(S_RFKILL, &il->status);
else
clear_bit(S_RFKILL, &il->status);
if (!(flags & RXON_CARD_DISABLED))
il_scan_cancel(il);
if ((test_bit(S_RFKILL, &status) !=
test_bit(S_RFKILL, &il->status)))
wiphy_rfkill_set_hw_state(il->hw->wiphy,
test_bit(S_RFKILL, &il->status));
else
wake_up(&il->wait_command_queue);
}
/*
* il4965_setup_handlers - Initialize Rx handler callbacks
*
* Setup the RX handlers for each of the reply types sent from the uCode
* to the host.
*
* This function chains into the hardware specific files for them to setup
* any hardware specific handlers as well.
*/
static void
il4965_setup_handlers(struct il_priv *il)
{
il->handlers[N_ALIVE] = il4965_hdl_alive;
il->handlers[N_ERROR] = il_hdl_error;
il->handlers[N_CHANNEL_SWITCH] = il_hdl_csa;
il->handlers[N_SPECTRUM_MEASUREMENT] = il_hdl_spectrum_measurement;
il->handlers[N_PM_SLEEP] = il_hdl_pm_sleep;
il->handlers[N_PM_DEBUG_STATS] = il_hdl_pm_debug_stats;
il->handlers[N_BEACON] = il4965_hdl_beacon;
/*
* The same handler is used for both the REPLY to a discrete
* stats request from the host as well as for the periodic
* stats notifications (after received beacons) from the uCode.
*/
il->handlers[C_STATS] = il4965_hdl_c_stats;
il->handlers[N_STATS] = il4965_hdl_stats;
il_setup_rx_scan_handlers(il);
/* status change handler */
il->handlers[N_CARD_STATE] = il4965_hdl_card_state;
il->handlers[N_MISSED_BEACONS] = il4965_hdl_missed_beacon;
/* Rx handlers */
il->handlers[N_RX_PHY] = il4965_hdl_rx_phy;
il->handlers[N_RX_MPDU] = il4965_hdl_rx;
il->handlers[N_RX] = il4965_hdl_rx;
/* block ack */
il->handlers[N_COMPRESSED_BA] = il4965_hdl_compressed_ba;
/* Tx response */
il->handlers[C_TX] = il4965_hdl_tx;
}
/*
* il4965_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the il->handlers callback function array to invoke
* the appropriate handlers, including command responses,
* frame-received notifications, and other notifications.
*/
void
il4965_rx_handle(struct il_priv *il)
{
struct il_rx_buf *rxb;
struct il_rx_pkt *pkt;
struct il_rx_queue *rxq = &il->rxq;
u32 r, i;
int reclaim;
unsigned long flags;
u8 fill_rx = 0;
u32 count = 8;
int total_empty;
/* uCode's read idx (stored in shared DRAM) indicates the last Rx
* buffer that the driver may process (last buffer filled by ucode). */
r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF;
i = rxq->read;
/* Rx interrupt, but nothing sent from uCode */
if (i == r)
D_RX("r = %d, i = %d\n", r, i);
/* calculate total frames need to be restock after handling RX */
total_empty = r - rxq->write_actual;
if (total_empty < 0)
total_empty += RX_QUEUE_SIZE;
if (total_empty > (RX_QUEUE_SIZE / 2))
fill_rx = 1;
while (i != r) {
int len;
rxb = rxq->queue[i];
/* If an RXB doesn't have a Rx queue slot associated with it,
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
rxq->queue[i] = NULL;
dma_unmap_page(&il->pci_dev->dev, rxb->page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
pkt = rxb_addr(rxb);
len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
len += sizeof(u32); /* account for status word */
reclaim = il_need_reclaim(il, pkt);
/* Based on type of command response or notification,
* handle those that need handling via function in
* handlers table. See il4965_setup_handlers() */
if (il->handlers[pkt->hdr.cmd]) {
D_RX("r = %d, i = %d, %s, 0x%02x\n", r, i,
il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
il->isr_stats.handlers[pkt->hdr.cmd]++;
il->handlers[pkt->hdr.cmd] (il, rxb);
} else {
/* No handling needed */
D_RX("r %d i %d No handler needed for %s, 0x%02x\n", r,
i, il_get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
}
/*
* XXX: After here, we should always check rxb->page
* against NULL before touching it or its virtual
* memory (pkt). Because some handler might have
* already taken or freed the pages.
*/
if (reclaim) {
/* Invoke any callbacks, transfer the buffer to caller,
* and fire off the (possibly) blocking il_send_cmd()
* as we reclaim the driver command queue */
if (rxb->page)
il_tx_cmd_complete(il, rxb);
else
IL_WARN("Claim null rxb?\n");
}
/* Reuse the page if possible. For notification packets and
* SKBs that fail to Rx correctly, add them back into the
* rx_free list for reuse later. */
spin_lock_irqsave(&rxq->lock, flags);
if (rxb->page != NULL) {
rxb->page_dma =
dma_map_page(&il->pci_dev->dev, rxb->page, 0,
PAGE_SIZE << il->hw_params.rx_page_order,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(&il->pci_dev->dev,
rxb->page_dma))) {
__il_free_pages(il, rxb->page);
rxb->page = NULL;
list_add_tail(&rxb->list, &rxq->rx_used);
} else {
list_add_tail(&rxb->list, &rxq->rx_free);
rxq->free_count++;
}
} else
list_add_tail(&rxb->list, &rxq->rx_used);
spin_unlock_irqrestore(&rxq->lock, flags);
i = (i + 1) & RX_QUEUE_MASK;
/* If there are a lot of unused frames,
* restock the Rx queue so ucode wont assert. */
if (fill_rx) {
count++;
if (count >= 8) {
rxq->read = i;
il4965_rx_replenish_now(il);
count = 0;
}
}
}
/* Backtrack one entry */
rxq->read = i;
if (fill_rx)
il4965_rx_replenish_now(il);
else
il4965_rx_queue_restock(il);
}
/* call this function to flush any scheduled tasklet */
static inline void
il4965_synchronize_irq(struct il_priv *il)
{
/* wait to make sure we flush pending tasklet */
synchronize_irq(il->pci_dev->irq);
tasklet_kill(&il->irq_tasklet);
}
static void
il4965_irq_tasklet(struct tasklet_struct *t)
{
struct il_priv *il = from_tasklet(il, t, irq_tasklet);
u32 inta, handled = 0;
u32 inta_fh;
unsigned long flags;
u32 i;
#ifdef CONFIG_IWLEGACY_DEBUG
u32 inta_mask;
#endif
spin_lock_irqsave(&il->lock, flags);
/* Ack/clear/reset pending uCode interrupts.
* Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
* and will clear only when CSR_FH_INT_STATUS gets cleared. */
inta = _il_rd(il, CSR_INT);
_il_wr(il, CSR_INT, inta);
/* Ack/clear/reset pending flow-handler (DMA) interrupts.
* Any new interrupts that happen after this, either while we're
* in this tasklet, or later, will show up in next ISR/tasklet. */
inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
_il_wr(il, CSR_FH_INT_STATUS, inta_fh);
#ifdef CONFIG_IWLEGACY_DEBUG
if (il_get_debug_level(il) & IL_DL_ISR) {
/* just for debug */
inta_mask = _il_rd(il, CSR_INT_MASK);
D_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta,
inta_mask, inta_fh);
}
#endif
spin_unlock_irqrestore(&il->lock, flags);
/* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
* atomic, make sure that inta covers all the interrupts that
* we've discovered, even if FH interrupt came in just after
* reading CSR_INT. */
if (inta_fh & CSR49_FH_INT_RX_MASK)
inta |= CSR_INT_BIT_FH_RX;
if (inta_fh & CSR49_FH_INT_TX_MASK)
inta |= CSR_INT_BIT_FH_TX;
/* Now service all interrupt bits discovered above. */
if (inta & CSR_INT_BIT_HW_ERR) {
IL_ERR("Hardware error detected. Restarting.\n");
/* Tell the device to stop sending interrupts */
il_disable_interrupts(il);
il->isr_stats.hw++;
il_irq_handle_error(il);
handled |= CSR_INT_BIT_HW_ERR;
return;
}
#ifdef CONFIG_IWLEGACY_DEBUG
if (il_get_debug_level(il) & (IL_DL_ISR)) {
/* NIC fires this, but we don't use it, redundant with WAKEUP */
if (inta & CSR_INT_BIT_SCD) {
D_ISR("Scheduler finished to transmit "
"the frame/frames.\n");
il->isr_stats.sch++;
}
/* Alive notification via Rx interrupt will do the real work */
if (inta & CSR_INT_BIT_ALIVE) {
D_ISR("Alive interrupt\n");
il->isr_stats.alive++;
}
}
#endif
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
/* HW RF KILL switch toggled */
if (inta & CSR_INT_BIT_RF_KILL) {
int hw_rf_kill = 0;
if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
hw_rf_kill = 1;
IL_WARN("RF_KILL bit toggled to %s.\n",
hw_rf_kill ? "disable radio" : "enable radio");
il->isr_stats.rfkill++;
/* driver only loads ucode once setting the interface up.
* the driver allows loading the ucode even if the radio
* is killed. Hence update the killswitch state here. The
* rfkill handler will care about restarting if needed.
*/
if (hw_rf_kill) {
set_bit(S_RFKILL, &il->status);
} else {
clear_bit(S_RFKILL, &il->status);
il_force_reset(il, true);
}
wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rf_kill);
handled |= CSR_INT_BIT_RF_KILL;
}
/* Chip got too hot and stopped itself */
if (inta & CSR_INT_BIT_CT_KILL) {
IL_ERR("Microcode CT kill error detected.\n");
il->isr_stats.ctkill++;
handled |= CSR_INT_BIT_CT_KILL;
}
/* Error detected by uCode */
if (inta & CSR_INT_BIT_SW_ERR) {
IL_ERR("Microcode SW error detected. " " Restarting 0x%X.\n",
inta);
il->isr_stats.sw++;
il_irq_handle_error(il);
handled |= CSR_INT_BIT_SW_ERR;
}
/*
* uCode wakes up after power-down sleep.
* Tell device about any new tx or host commands enqueued,
* and about any Rx buffers made available while asleep.
*/
if (inta & CSR_INT_BIT_WAKEUP) {
D_ISR("Wakeup interrupt\n");
il_rx_queue_update_write_ptr(il, &il->rxq);
for (i = 0; i < il->hw_params.max_txq_num; i++)
il_txq_update_write_ptr(il, &il->txq[i]);
il->isr_stats.wakeup++;
handled |= CSR_INT_BIT_WAKEUP;
}
/* All uCode command responses, including Tx command responses,
* Rx "responses" (frame-received notification), and other
* notifications from uCode come through here*/
if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
il4965_rx_handle(il);
il->isr_stats.rx++;
handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
}
/* This "Tx" DMA channel is used only for loading uCode */
if (inta & CSR_INT_BIT_FH_TX) {
D_ISR("uCode load interrupt\n");
il->isr_stats.tx++;
handled |= CSR_INT_BIT_FH_TX;
/* Wake up uCode load routine, now that load is complete */
il->ucode_write_complete = 1;
wake_up(&il->wait_command_queue);
}
if (inta & ~handled) {
IL_ERR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
il->isr_stats.unhandled++;
}
if (inta & ~(il->inta_mask)) {
IL_WARN("Disabled INTA bits 0x%08x were pending\n",
inta & ~il->inta_mask);
IL_WARN(" with FH49_INT = 0x%08x\n", inta_fh);
}
/* Re-enable all interrupts */
/* only Re-enable if disabled by irq */
if (test_bit(S_INT_ENABLED, &il->status))
il_enable_interrupts(il);
/* Re-enable RF_KILL if it occurred */
else if (handled & CSR_INT_BIT_RF_KILL)
il_enable_rfkill_int(il);
#ifdef CONFIG_IWLEGACY_DEBUG
if (il_get_debug_level(il) & (IL_DL_ISR)) {
inta = _il_rd(il, CSR_INT);
inta_mask = _il_rd(il, CSR_INT_MASK);
inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
D_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
"flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
}
#endif
}
/*****************************************************************************
*
* sysfs attributes
*
*****************************************************************************/
#ifdef CONFIG_IWLEGACY_DEBUG
/*
* The following adds a new attribute to the sysfs representation
* of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
* used for controlling the debug level.
*
* See the level definitions in iwl for details.
*
* The debug_level being managed using sysfs below is a per device debug
* level that is used instead of the global debug level if it (the per
* device debug level) is set.
*/
static ssize_t
il4965_show_debug_level(struct device *d, struct device_attribute *attr,
char *buf)
{
struct il_priv *il = dev_get_drvdata(d);
return sprintf(buf, "0x%08X\n", il_get_debug_level(il));
}
static ssize_t
il4965_store_debug_level(struct device *d, struct device_attribute *attr,
const char *buf, size_t count)
{
struct il_priv *il = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = kstrtoul(buf, 0, &val);
if (ret)
IL_ERR("%s is not in hex or decimal form.\n", buf);
else
il->debug_level = val;
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, 0644, il4965_show_debug_level,
il4965_store_debug_level);
#endif /* CONFIG_IWLEGACY_DEBUG */
static ssize_t
il4965_show_temperature(struct device *d, struct device_attribute *attr,
char *buf)
{
struct il_priv *il = dev_get_drvdata(d);
if (!il_is_alive(il))
return -EAGAIN;
return sprintf(buf, "%d\n", il->temperature);
}
static DEVICE_ATTR(temperature, 0444, il4965_show_temperature, NULL);
static ssize_t
il4965_show_tx_power(struct device *d, struct device_attribute *attr, char *buf)
{
struct il_priv *il = dev_get_drvdata(d);
if (!il_is_ready_rf(il))
return sprintf(buf, "off\n");
else
return sprintf(buf, "%d\n", il->tx_power_user_lmt);
}
static ssize_t
il4965_store_tx_power(struct device *d, struct device_attribute *attr,
const char *buf, size_t count)
{
struct il_priv *il = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = kstrtoul(buf, 10, &val);
if (ret)
IL_INFO("%s is not in decimal form.\n", buf);
else {
ret = il_set_tx_power(il, val, false);
if (ret)
IL_ERR("failed setting tx power (0x%08x).\n", ret);
else
ret = count;
}
return ret;
}
static DEVICE_ATTR(tx_power, 0644, il4965_show_tx_power,
il4965_store_tx_power);
static struct attribute *il_sysfs_entries[] = {
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
#ifdef CONFIG_IWLEGACY_DEBUG
&dev_attr_debug_level.attr,
#endif
NULL
};
static const struct attribute_group il_attribute_group = {
.name = NULL, /* put in device directory */
.attrs = il_sysfs_entries,
};
/******************************************************************************
*
* uCode download functions
*
******************************************************************************/
static void
il4965_dealloc_ucode_pci(struct il_priv *il)
{
il_free_fw_desc(il->pci_dev, &il->ucode_code);
il_free_fw_desc(il->pci_dev, &il->ucode_data);
il_free_fw_desc(il->pci_dev, &il->ucode_data_backup);
il_free_fw_desc(il->pci_dev, &il->ucode_init);
il_free_fw_desc(il->pci_dev, &il->ucode_init_data);
il_free_fw_desc(il->pci_dev, &il->ucode_boot);
}
static void
il4965_nic_start(struct il_priv *il)
{
/* Remove all resets to allow NIC to operate */
_il_wr(il, CSR_RESET, 0);
}
static void il4965_ucode_callback(const struct firmware *ucode_raw,
void *context);
static int il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length);
static int __must_check
il4965_request_firmware(struct il_priv *il, bool first)
{
const char *name_pre = il->cfg->fw_name_pre;
char tag[8];
if (first) {
il->fw_idx = il->cfg->ucode_api_max;
sprintf(tag, "%d", il->fw_idx);
} else {
il->fw_idx--;
sprintf(tag, "%d", il->fw_idx);
}
if (il->fw_idx < il->cfg->ucode_api_min) {
IL_ERR("no suitable firmware found!\n");
return -ENOENT;
}
sprintf(il->firmware_name, "%s%s%s", name_pre, tag, ".ucode");
D_INFO("attempting to load firmware '%s'\n", il->firmware_name);
return request_firmware_nowait(THIS_MODULE, 1, il->firmware_name,
&il->pci_dev->dev, GFP_KERNEL, il,
il4965_ucode_callback);
}
struct il4965_firmware_pieces {
const void *inst, *data, *init, *init_data, *boot;
size_t inst_size, data_size, init_size, init_data_size, boot_size;
};
static int
il4965_load_firmware(struct il_priv *il, const struct firmware *ucode_raw,
struct il4965_firmware_pieces *pieces)
{
struct il_ucode_header *ucode = (void *)ucode_raw->data;
u32 api_ver, hdr_size;
const u8 *src;
il->ucode_ver = le32_to_cpu(ucode->ver);
api_ver = IL_UCODE_API(il->ucode_ver);
switch (api_ver) {
default:
case 0:
case 1:
case 2:
hdr_size = 24;
if (ucode_raw->size < hdr_size) {
IL_ERR("File size too small!\n");
return -EINVAL;
}
pieces->inst_size = le32_to_cpu(ucode->v1.inst_size);
pieces->data_size = le32_to_cpu(ucode->v1.data_size);
pieces->init_size = le32_to_cpu(ucode->v1.init_size);
pieces->init_data_size = le32_to_cpu(ucode->v1.init_data_size);
pieces->boot_size = le32_to_cpu(ucode->v1.boot_size);
src = ucode->v1.data;
break;
}
/* Verify size of file vs. image size info in file's header */
if (ucode_raw->size !=
hdr_size + pieces->inst_size + pieces->data_size +
pieces->init_size + pieces->init_data_size + pieces->boot_size) {
IL_ERR("uCode file size %d does not match expected size\n",
(int)ucode_raw->size);
return -EINVAL;
}
pieces->inst = src;
src += pieces->inst_size;
pieces->data = src;
src += pieces->data_size;
pieces->init = src;
src += pieces->init_size;
pieces->init_data = src;
src += pieces->init_data_size;
pieces->boot = src;
src += pieces->boot_size;
return 0;
}
/*
* il4965_ucode_callback - callback when firmware was loaded
*
* If loaded successfully, copies the firmware into buffers
* for the card to fetch (via DMA).
*/
static void
il4965_ucode_callback(const struct firmware *ucode_raw, void *context)
{
struct il_priv *il = context;
int err;
struct il4965_firmware_pieces pieces;
const unsigned int api_max = il->cfg->ucode_api_max;
const unsigned int api_min = il->cfg->ucode_api_min;
u32 api_ver;
u32 max_probe_length = 200;
u32 standard_phy_calibration_size =
IL_DEFAULT_STANDARD_PHY_CALIBRATE_TBL_SIZE;
memset(&pieces, 0, sizeof(pieces));
if (!ucode_raw) {
if (il->fw_idx <= il->cfg->ucode_api_max)
IL_ERR("request for firmware file '%s' failed.\n",
il->firmware_name);
goto try_again;
}
D_INFO("Loaded firmware file '%s' (%zd bytes).\n", il->firmware_name,
ucode_raw->size);
/* Make sure that we got at least the API version number */
if (ucode_raw->size < 4) {
IL_ERR("File size way too small!\n");
goto try_again;
}
/* Data from ucode file: header followed by uCode images */
err = il4965_load_firmware(il, ucode_raw, &pieces);
if (err)
goto try_again;
api_ver = IL_UCODE_API(il->ucode_ver);
/*
* api_ver should match the api version forming part of the
* firmware filename ... but we don't check for that and only rely
* on the API version read from firmware header from here on forward
*/
if (api_ver < api_min || api_ver > api_max) {
IL_ERR("Driver unable to support your firmware API. "
"Driver supports v%u, firmware is v%u.\n", api_max,
api_ver);
goto try_again;
}
if (api_ver != api_max)
IL_ERR("Firmware has old API version. Expected v%u, "
"got v%u. New firmware can be obtained "
"from http://www.intellinuxwireless.org.\n", api_max,
api_ver);
IL_INFO("loaded firmware version %u.%u.%u.%u\n",
IL_UCODE_MAJOR(il->ucode_ver), IL_UCODE_MINOR(il->ucode_ver),
IL_UCODE_API(il->ucode_ver), IL_UCODE_SERIAL(il->ucode_ver));
snprintf(il->hw->wiphy->fw_version, sizeof(il->hw->wiphy->fw_version),
"%u.%u.%u.%u", IL_UCODE_MAJOR(il->ucode_ver),
IL_UCODE_MINOR(il->ucode_ver), IL_UCODE_API(il->ucode_ver),
IL_UCODE_SERIAL(il->ucode_ver));
/*
* For any of the failures below (before allocating pci memory)
* we will try to load a version with a smaller API -- maybe the
* user just got a corrupted version of the latest API.
*/
D_INFO("f/w package hdr ucode version raw = 0x%x\n", il->ucode_ver);
D_INFO("f/w package hdr runtime inst size = %zd\n", pieces.inst_size);
D_INFO("f/w package hdr runtime data size = %zd\n", pieces.data_size);
D_INFO("f/w package hdr init inst size = %zd\n", pieces.init_size);
D_INFO("f/w package hdr init data size = %zd\n", pieces.init_data_size);
D_INFO("f/w package hdr boot inst size = %zd\n", pieces.boot_size);
/* Verify that uCode images will fit in card's SRAM */
if (pieces.inst_size > il->hw_params.max_inst_size) {
IL_ERR("uCode instr len %zd too large to fit in\n",
pieces.inst_size);
goto try_again;
}
if (pieces.data_size > il->hw_params.max_data_size) {
IL_ERR("uCode data len %zd too large to fit in\n",
pieces.data_size);
goto try_again;
}
if (pieces.init_size > il->hw_params.max_inst_size) {
IL_ERR("uCode init instr len %zd too large to fit in\n",
pieces.init_size);
goto try_again;
}
if (pieces.init_data_size > il->hw_params.max_data_size) {
IL_ERR("uCode init data len %zd too large to fit in\n",
pieces.init_data_size);
goto try_again;
}
if (pieces.boot_size > il->hw_params.max_bsm_size) {
IL_ERR("uCode boot instr len %zd too large to fit in\n",
pieces.boot_size);
goto try_again;
}
/* Allocate ucode buffers for card's bus-master loading ... */
/* Runtime instructions and 2 copies of data:
* 1) unmodified from disk
* 2) backup cache for save/restore during power-downs */
il->ucode_code.len = pieces.inst_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_code);
il->ucode_data.len = pieces.data_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_data);
il->ucode_data_backup.len = pieces.data_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_data_backup);
if (!il->ucode_code.v_addr || !il->ucode_data.v_addr ||
!il->ucode_data_backup.v_addr)
goto err_pci_alloc;
/* Initialization instructions and data */
if (pieces.init_size && pieces.init_data_size) {
il->ucode_init.len = pieces.init_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_init);
il->ucode_init_data.len = pieces.init_data_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_init_data);
if (!il->ucode_init.v_addr || !il->ucode_init_data.v_addr)
goto err_pci_alloc;
}
/* Bootstrap (instructions only, no data) */
if (pieces.boot_size) {
il->ucode_boot.len = pieces.boot_size;
il_alloc_fw_desc(il->pci_dev, &il->ucode_boot);
if (!il->ucode_boot.v_addr)
goto err_pci_alloc;
}
/* Now that we can no longer fail, copy information */
il->sta_key_max_num = STA_KEY_MAX_NUM;
/* Copy images into buffers for card's bus-master reads ... */
/* Runtime instructions (first block of data in file) */
D_INFO("Copying (but not loading) uCode instr len %zd\n",
pieces.inst_size);
memcpy(il->ucode_code.v_addr, pieces.inst, pieces.inst_size);
D_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
il->ucode_code.v_addr, (u32) il->ucode_code.p_addr);
/*
* Runtime data
* NOTE: Copy into backup buffer will be done in il_up()
*/
D_INFO("Copying (but not loading) uCode data len %zd\n",
pieces.data_size);
memcpy(il->ucode_data.v_addr, pieces.data, pieces.data_size);
memcpy(il->ucode_data_backup.v_addr, pieces.data, pieces.data_size);
/* Initialization instructions */
if (pieces.init_size) {
D_INFO("Copying (but not loading) init instr len %zd\n",
pieces.init_size);
memcpy(il->ucode_init.v_addr, pieces.init, pieces.init_size);
}
/* Initialization data */
if (pieces.init_data_size) {
D_INFO("Copying (but not loading) init data len %zd\n",
pieces.init_data_size);
memcpy(il->ucode_init_data.v_addr, pieces.init_data,
pieces.init_data_size);
}
/* Bootstrap instructions */
D_INFO("Copying (but not loading) boot instr len %zd\n",
pieces.boot_size);
memcpy(il->ucode_boot.v_addr, pieces.boot, pieces.boot_size);
/*
* figure out the offset of chain noise reset and gain commands
* base on the size of standard phy calibration commands table size
*/
il->_4965.phy_calib_chain_noise_reset_cmd =
standard_phy_calibration_size;
il->_4965.phy_calib_chain_noise_gain_cmd =
standard_phy_calibration_size + 1;
/**************************************************
* This is still part of probe() in a sense...
*
* 9. Setup and register with mac80211 and debugfs
**************************************************/
err = il4965_mac_setup_register(il, max_probe_length);
if (err)
goto out_unbind;
il_dbgfs_register(il, DRV_NAME);
err = sysfs_create_group(&il->pci_dev->dev.kobj, &il_attribute_group);
if (err) {
IL_ERR("failed to create sysfs device attributes\n");
goto out_unbind;
}
/* We have our copies now, allow OS release its copies */
release_firmware(ucode_raw);
complete(&il->_4965.firmware_loading_complete);
return;
try_again:
/* try next, if any */
if (il4965_request_firmware(il, false))
goto out_unbind;
release_firmware(ucode_raw);
return;
err_pci_alloc:
IL_ERR("failed to allocate pci memory\n");
il4965_dealloc_ucode_pci(il);
out_unbind:
complete(&il->_4965.firmware_loading_complete);
device_release_driver(&il->pci_dev->dev);
release_firmware(ucode_raw);
}
static const char *const desc_lookup_text[] = {
"OK",
"FAIL",
"BAD_PARAM",
"BAD_CHECKSUM",
"NMI_INTERRUPT_WDG",
"SYSASSERT",
"FATAL_ERROR",
"BAD_COMMAND",
"HW_ERROR_TUNE_LOCK",
"HW_ERROR_TEMPERATURE",
"ILLEGAL_CHAN_FREQ",
"VCC_NOT_STBL",
"FH49_ERROR",
"NMI_INTERRUPT_HOST",
"NMI_INTERRUPT_ACTION_PT",
"NMI_INTERRUPT_UNKNOWN",
"UCODE_VERSION_MISMATCH",
"HW_ERROR_ABS_LOCK",
"HW_ERROR_CAL_LOCK_FAIL",
"NMI_INTERRUPT_INST_ACTION_PT",
"NMI_INTERRUPT_DATA_ACTION_PT",
"NMI_TRM_HW_ER",
"NMI_INTERRUPT_TRM",
"NMI_INTERRUPT_BREAK_POINT",
"DEBUG_0",
"DEBUG_1",
"DEBUG_2",
"DEBUG_3",
};
static struct {
char *name;
u8 num;
} advanced_lookup[] = {
{
"NMI_INTERRUPT_WDG", 0x34}, {
"SYSASSERT", 0x35}, {
"UCODE_VERSION_MISMATCH", 0x37}, {
"BAD_COMMAND", 0x38}, {
"NMI_INTERRUPT_DATA_ACTION_PT", 0x3C}, {
"FATAL_ERROR", 0x3D}, {
"NMI_TRM_HW_ERR", 0x46}, {
"NMI_INTERRUPT_TRM", 0x4C}, {
"NMI_INTERRUPT_BREAK_POINT", 0x54}, {
"NMI_INTERRUPT_WDG_RXF_FULL", 0x5C}, {
"NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64}, {
"NMI_INTERRUPT_HOST", 0x66}, {
"NMI_INTERRUPT_ACTION_PT", 0x7C}, {
"NMI_INTERRUPT_UNKNOWN", 0x84}, {
"NMI_INTERRUPT_INST_ACTION_PT", 0x86}, {
"ADVANCED_SYSASSERT", 0},};
static const char *
il4965_desc_lookup(u32 num)
{
int i;
int max = ARRAY_SIZE(desc_lookup_text);
if (num < max)
return desc_lookup_text[num];
max = ARRAY_SIZE(advanced_lookup) - 1;
for (i = 0; i < max; i++) {
if (advanced_lookup[i].num == num)
break;
}
return advanced_lookup[i].name;
}
#define ERROR_START_OFFSET (1 * sizeof(u32))
#define ERROR_ELEM_SIZE (7 * sizeof(u32))
void
il4965_dump_nic_error_log(struct il_priv *il)
{
u32 data2, line;
u32 desc, time, count, base, data1;
u32 blink1, blink2, ilink1, ilink2;
u32 pc, hcmd;
if (il->ucode_type == UCODE_INIT)
base = le32_to_cpu(il->card_alive_init.error_event_table_ptr);
else
base = le32_to_cpu(il->card_alive.error_event_table_ptr);
if (!il->ops->is_valid_rtc_data_addr(base)) {
IL_ERR("Not valid error log pointer 0x%08X for %s uCode\n",
base, (il->ucode_type == UCODE_INIT) ? "Init" : "RT");
return;
}
count = il_read_targ_mem(il, base);
if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
IL_ERR("Start IWL Error Log Dump:\n");
IL_ERR("Status: 0x%08lX, count: %d\n", il->status, count);
}
desc = il_read_targ_mem(il, base + 1 * sizeof(u32));
il->isr_stats.err_code = desc;
pc = il_read_targ_mem(il, base + 2 * sizeof(u32));
blink1 = il_read_targ_mem(il, base + 3 * sizeof(u32));
blink2 = il_read_targ_mem(il, base + 4 * sizeof(u32));
ilink1 = il_read_targ_mem(il, base + 5 * sizeof(u32));
ilink2 = il_read_targ_mem(il, base + 6 * sizeof(u32));
data1 = il_read_targ_mem(il, base + 7 * sizeof(u32));
data2 = il_read_targ_mem(il, base + 8 * sizeof(u32));
line = il_read_targ_mem(il, base + 9 * sizeof(u32));
time = il_read_targ_mem(il, base + 11 * sizeof(u32));
hcmd = il_read_targ_mem(il, base + 22 * sizeof(u32));
IL_ERR("Desc Time "
"data1 data2 line\n");
IL_ERR("%-28s (0x%04X) %010u 0x%08X 0x%08X %u\n",
il4965_desc_lookup(desc), desc, time, data1, data2, line);
IL_ERR("pc blink1 blink2 ilink1 ilink2 hcmd\n");
IL_ERR("0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n", pc, blink1,
blink2, ilink1, ilink2, hcmd);
}
static void
il4965_rf_kill_ct_config(struct il_priv *il)
{
struct il_ct_kill_config cmd;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&il->lock, flags);
_il_wr(il, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
spin_unlock_irqrestore(&il->lock, flags);
cmd.critical_temperature_R =
cpu_to_le32(il->hw_params.ct_kill_threshold);
ret = il_send_cmd_pdu(il, C_CT_KILL_CONFIG, sizeof(cmd), &cmd);
if (ret)
IL_ERR("C_CT_KILL_CONFIG failed\n");
else
D_INFO("C_CT_KILL_CONFIG " "succeeded, "
"critical temperature is %d\n",
il->hw_params.ct_kill_threshold);
}
static const s8 default_queue_to_tx_fifo[] = {
IL_TX_FIFO_VO,
IL_TX_FIFO_VI,
IL_TX_FIFO_BE,
IL_TX_FIFO_BK,
IL49_CMD_FIFO_NUM,
IL_TX_FIFO_UNUSED,
IL_TX_FIFO_UNUSED,
};
#define IL_MASK(lo, hi) ((1 << (hi)) | ((1 << (hi)) - (1 << (lo))))
static int
il4965_alive_notify(struct il_priv *il)
{
u32 a;
unsigned long flags;
int i, chan;
u32 reg_val;
spin_lock_irqsave(&il->lock, flags);
/* Clear 4965's internal Tx Scheduler data base */
il->scd_base_addr = il_rd_prph(il, IL49_SCD_SRAM_BASE_ADDR);
a = il->scd_base_addr + IL49_SCD_CONTEXT_DATA_OFFSET;
for (; a < il->scd_base_addr + IL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
il_write_targ_mem(il, a, 0);
for (; a < il->scd_base_addr + IL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
il_write_targ_mem(il, a, 0);
for (;
a <
il->scd_base_addr +
IL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(il->hw_params.max_txq_num);
a += 4)
il_write_targ_mem(il, a, 0);
/* Tel 4965 where to find Tx byte count tables */
il_wr_prph(il, IL49_SCD_DRAM_BASE_ADDR, il->scd_bc_tbls.dma >> 10);
/* Enable DMA channel */
for (chan = 0; chan < FH49_TCSR_CHNL_NUM; chan++)
il_wr(il, FH49_TCSR_CHNL_TX_CONFIG_REG(chan),
FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
FH49_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
/* Update FH chicken bits */
reg_val = il_rd(il, FH49_TX_CHICKEN_BITS_REG);
il_wr(il, FH49_TX_CHICKEN_BITS_REG,
reg_val | FH49_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
/* Disable chain mode for all queues */
il_wr_prph(il, IL49_SCD_QUEUECHAIN_SEL, 0);
/* Initialize each Tx queue (including the command queue) */
for (i = 0; i < il->hw_params.max_txq_num; i++) {
/* TFD circular buffer read/write idxes */
il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(i), 0);
il_wr(il, HBUS_TARG_WRPTR, 0 | (i << 8));
/* Max Tx Window size for Scheduler-ACK mode */
il_write_targ_mem(il,
il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(i),
(SCD_WIN_SIZE <<
IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
IL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
/* Frame limit */
il_write_targ_mem(il,
il->scd_base_addr +
IL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
sizeof(u32),
(SCD_FRAME_LIMIT <<
IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
IL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
}
il_wr_prph(il, IL49_SCD_INTERRUPT_MASK,
(1 << il->hw_params.max_txq_num) - 1);
/* Activate all Tx DMA/FIFO channels */
il4965_txq_set_sched(il, IL_MASK(0, 6));
il4965_set_wr_ptrs(il, IL_DEFAULT_CMD_QUEUE_NUM, 0);
/* make sure all queue are not stopped */
memset(&il->queue_stopped[0], 0, sizeof(il->queue_stopped));
for (i = 0; i < 4; i++)
atomic_set(&il->queue_stop_count[i], 0);
/* reset to 0 to enable all the queue first */
il->txq_ctx_active_msk = 0;
/* Map each Tx/cmd queue to its corresponding fifo */
BUILD_BUG_ON(ARRAY_SIZE(default_queue_to_tx_fifo) != 7);
for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
int ac = default_queue_to_tx_fifo[i];
il_txq_ctx_activate(il, i);
if (ac == IL_TX_FIFO_UNUSED)
continue;
il4965_tx_queue_set_status(il, &il->txq[i], ac, 0);
}
spin_unlock_irqrestore(&il->lock, flags);
return 0;
}
/*
* il4965_alive_start - called after N_ALIVE notification received
* from protocol/runtime uCode (initialization uCode's
* Alive gets handled by il_init_alive_start()).
*/
static void
il4965_alive_start(struct il_priv *il)
{
int ret = 0;
D_INFO("Runtime Alive received.\n");
if (il->card_alive.is_valid != UCODE_VALID_OK) {
/* We had an error bringing up the hardware, so take it
* all the way back down so we can try again */
D_INFO("Alive failed.\n");
goto restart;
}
/* Initialize uCode has loaded Runtime uCode ... verify inst image.
* This is a paranoid check, because we would not have gotten the
* "runtime" alive if code weren't properly loaded. */
if (il4965_verify_ucode(il)) {
/* Runtime instruction load was bad;
* take it all the way back down so we can try again */
D_INFO("Bad runtime uCode load.\n");
goto restart;
}
ret = il4965_alive_notify(il);
if (ret) {
IL_WARN("Could not complete ALIVE transition [ntf]: %d\n", ret);
goto restart;
}
/* After the ALIVE response, we can send host commands to the uCode */
set_bit(S_ALIVE, &il->status);
/* Enable watchdog to monitor the driver tx queues */
il_setup_watchdog(il);
if (il_is_rfkill(il))
return;
ieee80211_wake_queues(il->hw);
il->active_rate = RATES_MASK;
il_power_update_mode(il, true);
D_INFO("Updated power mode\n");
if (il_is_associated(il)) {
struct il_rxon_cmd *active_rxon =
(struct il_rxon_cmd *)&il->active;
/* apply any changes in staging */
il->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
} else {
/* Initialize our rx_config data */
il_connection_init_rx_config(il);
if (il->ops->set_rxon_chain)
il->ops->set_rxon_chain(il);
}
/* Configure bluetooth coexistence if enabled */
il_send_bt_config(il);
il4965_reset_run_time_calib(il);
set_bit(S_READY, &il->status);
/* Configure the adapter for unassociated operation */
il_commit_rxon(il);
/* At this point, the NIC is initialized and operational */
il4965_rf_kill_ct_config(il);
D_INFO("ALIVE processing complete.\n");
wake_up(&il->wait_command_queue);
return;
restart:
queue_work(il->workqueue, &il->restart);
}
static void il4965_cancel_deferred_work(struct il_priv *il);
static void
__il4965_down(struct il_priv *il)
{
unsigned long flags;
int exit_pending;
D_INFO(DRV_NAME " is going down\n");
il_scan_cancel_timeout(il, 200);
exit_pending = test_and_set_bit(S_EXIT_PENDING, &il->status);
/* Stop TX queues watchdog. We need to have S_EXIT_PENDING bit set
* to prevent rearm timer */
del_timer_sync(&il->watchdog);
il_clear_ucode_stations(il);
/* FIXME: race conditions ? */
spin_lock_irq(&il->sta_lock);
/*
* Remove all key information that is not stored as part
* of station information since mac80211 may not have had
* a chance to remove all the keys. When device is
* reconfigured by mac80211 after an error all keys will
* be reconfigured.
*/
memset(il->_4965.wep_keys, 0, sizeof(il->_4965.wep_keys));
il->_4965.key_mapping_keys = 0;
spin_unlock_irq(&il->sta_lock);
il_dealloc_bcast_stations(il);
il_clear_driver_stations(il);
/* Unblock any waiting calls */
wake_up_all(&il->wait_command_queue);
/* Wipe out the EXIT_PENDING status bit if we are not actually
* exiting the module */
if (!exit_pending)
clear_bit(S_EXIT_PENDING, &il->status);
/* stop and reset the on-board processor */
_il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
/* tell the device to stop sending interrupts */
spin_lock_irqsave(&il->lock, flags);
il_disable_interrupts(il);
spin_unlock_irqrestore(&il->lock, flags);
il4965_synchronize_irq(il);
if (il->mac80211_registered)
ieee80211_stop_queues(il->hw);
/* If we have not previously called il_init() then
* clear all bits but the RF Kill bit and return */
if (!il_is_init(il)) {
il->status =
test_bit(S_RFKILL, &il->status) << S_RFKILL |
test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
goto exit;
}
/* ...otherwise clear out all the status bits but the RF Kill
* bit and continue taking the NIC down. */
il->status &=
test_bit(S_RFKILL, &il->status) << S_RFKILL |
test_bit(S_GEO_CONFIGURED, &il->status) << S_GEO_CONFIGURED |
test_bit(S_FW_ERROR, &il->status) << S_FW_ERROR |
test_bit(S_EXIT_PENDING, &il->status) << S_EXIT_PENDING;
/*
* We disabled and synchronized interrupt, and priv->mutex is taken, so
* here is the only thread which will program device registers, but
* still have lockdep assertions, so we are taking reg_lock.
*/
spin_lock_irq(&il->reg_lock);
/* FIXME: il_grab_nic_access if rfkill is off ? */
il4965_txq_ctx_stop(il);
il4965_rxq_stop(il);
/* Power-down device's busmaster DMA clocks */
_il_wr_prph(il, APMG_CLK_DIS_REG, APMG_CLK_VAL_DMA_CLK_RQT);
udelay(5);
/* Make sure (redundant) we've released our request to stay awake */
_il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/* Stop the device, and put it in low power state */
_il_apm_stop(il);
spin_unlock_irq(&il->reg_lock);
il4965_txq_ctx_unmap(il);
exit:
memset(&il->card_alive, 0, sizeof(struct il_alive_resp));
dev_kfree_skb(il->beacon_skb);
il->beacon_skb = NULL;
/* clear out any free frames */
il4965_clear_free_frames(il);
}
static void
il4965_down(struct il_priv *il)
{
mutex_lock(&il->mutex);
__il4965_down(il);
mutex_unlock(&il->mutex);
il4965_cancel_deferred_work(il);
}
static void
il4965_set_hw_ready(struct il_priv *il)
{
int ret;
il_set_bit(il, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
/* See if we got it */
ret = _il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
CSR_HW_IF_CONFIG_REG_BIT_NIC_READY,
100);
if (ret >= 0)
il->hw_ready = true;
D_INFO("hardware %s ready\n", (il->hw_ready) ? "" : "not");
}
static void
il4965_prepare_card_hw(struct il_priv *il)
{
int ret;
il->hw_ready = false;
il4965_set_hw_ready(il);
if (il->hw_ready)
return;
/* If HW is not ready, prepare the conditions to check again */
il_set_bit(il, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_PREPARE);
ret =
_il_poll_bit(il, CSR_HW_IF_CONFIG_REG,
~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
/* HW should be ready by now, check again. */
if (ret != -ETIMEDOUT)
il4965_set_hw_ready(il);
}
#define MAX_HW_RESTARTS 5
static int
__il4965_up(struct il_priv *il)
{
int i;
int ret;
if (test_bit(S_EXIT_PENDING, &il->status)) {
IL_WARN("Exit pending; will not bring the NIC up\n");
return -EIO;
}
if (!il->ucode_data_backup.v_addr || !il->ucode_data.v_addr) {
IL_ERR("ucode not available for device bringup\n");
return -EIO;
}
ret = il4965_alloc_bcast_station(il);
if (ret) {
il_dealloc_bcast_stations(il);
return ret;
}
il4965_prepare_card_hw(il);
if (!il->hw_ready) {
il_dealloc_bcast_stations(il);
IL_ERR("HW not ready\n");
return -EIO;
}
/* If platform's RF_KILL switch is NOT set to KILL */
if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(S_RFKILL, &il->status);
else {
set_bit(S_RFKILL, &il->status);
wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
il_dealloc_bcast_stations(il);
il_enable_rfkill_int(il);
IL_WARN("Radio disabled by HW RF Kill switch\n");
return 0;
}
_il_wr(il, CSR_INT, 0xFFFFFFFF);
/* must be initialised before il_hw_nic_init */
il->cmd_queue = IL_DEFAULT_CMD_QUEUE_NUM;
ret = il4965_hw_nic_init(il);
if (ret) {
IL_ERR("Unable to init nic\n");
il_dealloc_bcast_stations(il);
return ret;
}
/* make sure rfkill handshake bits are cleared */
_il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
_il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
/* clear (again), then enable host interrupts */
_il_wr(il, CSR_INT, 0xFFFFFFFF);
il_enable_interrupts(il);
/* really make sure rfkill handshake bits are cleared */
_il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
_il_wr(il, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
/* Copy original ucode data image from disk into backup cache.
* This will be used to initialize the on-board processor's
* data SRAM for a clean start when the runtime program first loads. */
memcpy(il->ucode_data_backup.v_addr, il->ucode_data.v_addr,
il->ucode_data.len);
for (i = 0; i < MAX_HW_RESTARTS; i++) {
/* load bootstrap state machine,
* load bootstrap program into processor's memory,
* prepare to load the "initialize" uCode */
ret = il->ops->load_ucode(il);
if (ret) {
IL_ERR("Unable to set up bootstrap uCode: %d\n", ret);
continue;
}
/* start card; "initialize" will load runtime ucode */
il4965_nic_start(il);
D_INFO(DRV_NAME " is coming up\n");
return 0;
}
set_bit(S_EXIT_PENDING, &il->status);
__il4965_down(il);
clear_bit(S_EXIT_PENDING, &il->status);
/* tried to restart and config the device for as long as our
* patience could withstand */
IL_ERR("Unable to initialize device after %d attempts.\n", i);
return -EIO;
}
/*****************************************************************************
*
* Workqueue callbacks
*
*****************************************************************************/
static void
il4965_bg_init_alive_start(struct work_struct *data)
{
struct il_priv *il =
container_of(data, struct il_priv, init_alive_start.work);
mutex_lock(&il->mutex);
if (test_bit(S_EXIT_PENDING, &il->status))
goto out;
il->ops->init_alive_start(il);
out:
mutex_unlock(&il->mutex);
}
static void
il4965_bg_alive_start(struct work_struct *data)
{
struct il_priv *il =
container_of(data, struct il_priv, alive_start.work);
mutex_lock(&il->mutex);
if (test_bit(S_EXIT_PENDING, &il->status))
goto out;
il4965_alive_start(il);
out:
mutex_unlock(&il->mutex);
}
static void
il4965_bg_run_time_calib_work(struct work_struct *work)
{
struct il_priv *il = container_of(work, struct il_priv,
run_time_calib_work);
mutex_lock(&il->mutex);
if (test_bit(S_EXIT_PENDING, &il->status) ||
test_bit(S_SCANNING, &il->status)) {
mutex_unlock(&il->mutex);
return;
}
if (il->start_calib) {
il4965_chain_noise_calibration(il, (void *)&il->_4965.stats);
il4965_sensitivity_calibration(il, (void *)&il->_4965.stats);
}
mutex_unlock(&il->mutex);
}
static void
il4965_bg_restart(struct work_struct *data)
{
struct il_priv *il = container_of(data, struct il_priv, restart);
if (test_bit(S_EXIT_PENDING, &il->status))
return;
if (test_and_clear_bit(S_FW_ERROR, &il->status)) {
mutex_lock(&il->mutex);
il->is_open = 0;
__il4965_down(il);
mutex_unlock(&il->mutex);
il4965_cancel_deferred_work(il);
ieee80211_restart_hw(il->hw);
} else {
il4965_down(il);
mutex_lock(&il->mutex);
if (test_bit(S_EXIT_PENDING, &il->status)) {
mutex_unlock(&il->mutex);
return;
}
__il4965_up(il);
mutex_unlock(&il->mutex);
}
}
static void
il4965_bg_rx_replenish(struct work_struct *data)
{
struct il_priv *il = container_of(data, struct il_priv, rx_replenish);
if (test_bit(S_EXIT_PENDING, &il->status))
return;
mutex_lock(&il->mutex);
il4965_rx_replenish(il);
mutex_unlock(&il->mutex);
}
/*****************************************************************************
*
* mac80211 entry point functions
*
*****************************************************************************/
#define UCODE_READY_TIMEOUT (4 * HZ)
/*
* Not a mac80211 entry point function, but it fits in with all the
* other mac80211 functions grouped here.
*/
static int
il4965_mac_setup_register(struct il_priv *il, u32 max_probe_length)
{
int ret;
struct ieee80211_hw *hw = il->hw;
hw->rate_control_algorithm = "iwl-4965-rs";
/* Tell mac80211 our characteristics */
ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
ieee80211_hw_set(hw, SUPPORTS_PS);
ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
ieee80211_hw_set(hw, SPECTRUM_MGMT);
ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
ieee80211_hw_set(hw, SIGNAL_DBM);
ieee80211_hw_set(hw, AMPDU_AGGREGATION);
if (il->cfg->sku & IL_SKU_N)
hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
NL80211_FEATURE_STATIC_SMPS;
hw->sta_data_size = sizeof(struct il_station_priv);
hw->vif_data_size = sizeof(struct il_vif_priv);
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
REGULATORY_DISABLE_BEACON_HINTS;
/*
* For now, disable PS by default because it affects
* RX performance significantly.
*/
hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
/* we create the 802.11 header and a zero-length SSID element */
hw->wiphy->max_scan_ie_len = max_probe_length - 24 - 2;
/* Default value; 4 EDCA QOS priorities */
hw->queues = 4;
hw->max_listen_interval = IL_CONN_MAX_LISTEN_INTERVAL;
if (il->bands[NL80211_BAND_2GHZ].n_channels)
il->hw->wiphy->bands[NL80211_BAND_2GHZ] =
&il->bands[NL80211_BAND_2GHZ];
if (il->bands[NL80211_BAND_5GHZ].n_channels)
il->hw->wiphy->bands[NL80211_BAND_5GHZ] =
&il->bands[NL80211_BAND_5GHZ];
il_leds_init(il);
wiphy_ext_feature_set(il->hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
ret = ieee80211_register_hw(il->hw);
if (ret) {
IL_ERR("Failed to register hw (error %d)\n", ret);
return ret;
}
il->mac80211_registered = 1;
return 0;
}
int
il4965_mac_start(struct ieee80211_hw *hw)
{
struct il_priv *il = hw->priv;
int ret;
D_MAC80211("enter\n");
/* we should be verifying the device is ready to be opened */
mutex_lock(&il->mutex);
ret = __il4965_up(il);
mutex_unlock(&il->mutex);
if (ret)
return ret;
if (il_is_rfkill(il))
goto out;
D_INFO("Start UP work done.\n");
/* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
* mac80211 will not be run successfully. */
ret = wait_event_timeout(il->wait_command_queue,
test_bit(S_READY, &il->status),
UCODE_READY_TIMEOUT);
if (!ret) {
if (!test_bit(S_READY, &il->status)) {
IL_ERR("START_ALIVE timeout after %dms.\n",
jiffies_to_msecs(UCODE_READY_TIMEOUT));
return -ETIMEDOUT;
}
}
il4965_led_enable(il);
out:
il->is_open = 1;
D_MAC80211("leave\n");
return 0;
}
void
il4965_mac_stop(struct ieee80211_hw *hw)
{
struct il_priv *il = hw->priv;
D_MAC80211("enter\n");
if (!il->is_open)
return;
il->is_open = 0;
il4965_down(il);
flush_workqueue(il->workqueue);
/* User space software may expect getting rfkill changes
* even if interface is down */
_il_wr(il, CSR_INT, 0xFFFFFFFF);
il_enable_rfkill_int(il);
D_MAC80211("leave\n");
}
void
il4965_mac_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct il_priv *il = hw->priv;
D_MACDUMP("enter\n");
D_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
if (il4965_tx_skb(il, control->sta, skb))
dev_kfree_skb_any(skb);
D_MACDUMP("leave\n");
}
void
il4965_mac_update_tkip_key(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_key_conf *keyconf,
struct ieee80211_sta *sta, u32 iv32, u16 * phase1key)
{
struct il_priv *il = hw->priv;
D_MAC80211("enter\n");
il4965_update_tkip_key(il, keyconf, sta, iv32, phase1key);
D_MAC80211("leave\n");
}
int
il4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_vif *vif, struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct il_priv *il = hw->priv;
int ret;
u8 sta_id;
bool is_default_wep_key = false;
D_MAC80211("enter\n");
if (il->cfg->mod_params->sw_crypto) {
D_MAC80211("leave - hwcrypto disabled\n");
return -EOPNOTSUPP;
}
/*
* To support IBSS RSN, don't program group keys in IBSS, the
* hardware will then not attempt to decrypt the frames.
*/
if (vif->type == NL80211_IFTYPE_ADHOC &&
!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
D_MAC80211("leave - ad-hoc group key\n");
return -EOPNOTSUPP;
}
sta_id = il_sta_id_or_broadcast(il, sta);
if (sta_id == IL_INVALID_STATION)
return -EINVAL;
mutex_lock(&il->mutex);
il_scan_cancel_timeout(il, 100);
/*
* If we are getting WEP group key and we didn't receive any key mapping
* so far, we are in legacy wep mode (group key only), otherwise we are
* in 1X mode.
* In legacy wep mode, we use another host command to the uCode.
*/
if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
if (cmd == SET_KEY)
is_default_wep_key = !il->_4965.key_mapping_keys;
else
is_default_wep_key =
(key->hw_key_idx == HW_KEY_DEFAULT);
}
switch (cmd) {
case SET_KEY:
if (is_default_wep_key)
ret = il4965_set_default_wep_key(il, key);
else
ret = il4965_set_dynamic_key(il, key, sta_id);
D_MAC80211("enable hwcrypto key\n");
break;
case DISABLE_KEY:
if (is_default_wep_key)
ret = il4965_remove_default_wep_key(il, key);
else
ret = il4965_remove_dynamic_key(il, key, sta_id);
D_MAC80211("disable hwcrypto key\n");
break;
default:
ret = -EINVAL;
}
mutex_unlock(&il->mutex);
D_MAC80211("leave\n");
return ret;
}
int
il4965_mac_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_ampdu_params *params)
{
struct il_priv *il = hw->priv;
int ret = -EINVAL;
struct ieee80211_sta *sta = params->sta;
enum ieee80211_ampdu_mlme_action action = params->action;
u16 tid = params->tid;
u16 *ssn = &params->ssn;
D_HT("A-MPDU action on addr %pM tid %d\n", sta->addr, tid);
if (!(il->cfg->sku & IL_SKU_N))
return -EACCES;
mutex_lock(&il->mutex);
switch (action) {
case IEEE80211_AMPDU_RX_START:
D_HT("start Rx\n");
ret = il4965_sta_rx_agg_start(il, sta, tid, *ssn);
break;
case IEEE80211_AMPDU_RX_STOP:
D_HT("stop Rx\n");
ret = il4965_sta_rx_agg_stop(il, sta, tid);
if (test_bit(S_EXIT_PENDING, &il->status))
ret = 0;
break;
case IEEE80211_AMPDU_TX_START:
D_HT("start Tx\n");
ret = il4965_tx_agg_start(il, vif, sta, tid, ssn);
break;
case IEEE80211_AMPDU_TX_STOP_CONT:
case IEEE80211_AMPDU_TX_STOP_FLUSH:
case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
D_HT("stop Tx\n");
ret = il4965_tx_agg_stop(il, vif, sta, tid);
if (test_bit(S_EXIT_PENDING, &il->status))
ret = 0;
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ret = 0;
break;
}
mutex_unlock(&il->mutex);
return ret;
}
int
il4965_mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct il_priv *il = hw->priv;
struct il_station_priv *sta_priv = (void *)sta->drv_priv;
bool is_ap = vif->type == NL80211_IFTYPE_STATION;
int ret;
u8 sta_id;
D_INFO("received request to add station %pM\n", sta->addr);
mutex_lock(&il->mutex);
D_INFO("proceeding to add station %pM\n", sta->addr);
sta_priv->common.sta_id = IL_INVALID_STATION;
atomic_set(&sta_priv->pending_frames, 0);
ret =
il_add_station_common(il, sta->addr, is_ap, sta, &sta_id);
if (ret) {
IL_ERR("Unable to add station %pM (%d)\n", sta->addr, ret);
/* Should we return success if return code is EEXIST ? */
mutex_unlock(&il->mutex);
return ret;
}
sta_priv->common.sta_id = sta_id;
/* Initialize rate scaling */
D_INFO("Initializing rate scaling for station %pM\n", sta->addr);
il4965_rs_rate_init(il, sta, sta_id);
mutex_unlock(&il->mutex);
return 0;
}
void
il4965_mac_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_channel_switch *ch_switch)
{
struct il_priv *il = hw->priv;
const struct il_channel_info *ch_info;
struct ieee80211_conf *conf = &hw->conf;
struct ieee80211_channel *channel = ch_switch->chandef.chan;
struct il_ht_config *ht_conf = &il->current_ht_config;
u16 ch;
D_MAC80211("enter\n");
mutex_lock(&il->mutex);
if (il_is_rfkill(il))
goto out;
if (test_bit(S_EXIT_PENDING, &il->status) ||
test_bit(S_SCANNING, &il->status) ||
test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
goto out;
if (!il_is_associated(il))
goto out;
if (!il->ops->set_channel_switch)
goto out;
ch = channel->hw_value;
if (le16_to_cpu(il->active.channel) == ch)
goto out;
ch_info = il_get_channel_info(il, channel->band, ch);
if (!il_is_channel_valid(ch_info)) {
D_MAC80211("invalid channel\n");
goto out;
}
spin_lock_irq(&il->lock);
il->current_ht_config.smps = conf->smps_mode;
/* Configure HT40 channels */
switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
il->ht.is_40mhz = false;
il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
break;
case NL80211_CHAN_HT40MINUS:
il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
il->ht.is_40mhz = true;
break;
case NL80211_CHAN_HT40PLUS:
il->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
il->ht.is_40mhz = true;
break;
}
if ((le16_to_cpu(il->staging.channel) != ch))
il->staging.flags = 0;
il_set_rxon_channel(il, channel);
il_set_rxon_ht(il, ht_conf);
il_set_flags_for_band(il, channel->band, il->vif);
spin_unlock_irq(&il->lock);
il_set_rate(il);
/*
* at this point, staging_rxon has the
* configuration for channel switch
*/
set_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = cpu_to_le16(ch);
if (il->ops->set_channel_switch(il, ch_switch)) {
clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = 0;
ieee80211_chswitch_done(il->vif, false);
}
out:
mutex_unlock(&il->mutex);
D_MAC80211("leave\n");
}
void
il4965_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
unsigned int *total_flags, u64 multicast)
{
struct il_priv *il = hw->priv;
__le32 filter_or = 0, filter_nand = 0;
#define CHK(test, flag) do { \
if (*total_flags & (test)) \
filter_or |= (flag); \
else \
filter_nand |= (flag); \
} while (0)
D_MAC80211("Enter: changed: 0x%x, total: 0x%x\n", changed_flags,
*total_flags);
CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
/* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
#undef CHK
mutex_lock(&il->mutex);
il->staging.filter_flags &= ~filter_nand;
il->staging.filter_flags |= filter_or;
/*
* Not committing directly because hardware can perform a scan,
* but we'll eventually commit the filter flags change anyway.
*/
mutex_unlock(&il->mutex);
/*
* Receiving all multicast frames is always enabled by the
* default flags setup in il_connection_init_rx_config()
* since we currently do not support programming multicast
* filters into the device.
*/
*total_flags &=
FIF_OTHER_BSS | FIF_ALLMULTI |
FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}
/*****************************************************************************
*
* driver setup and teardown
*
*****************************************************************************/
static void
il4965_bg_txpower_work(struct work_struct *work)
{
struct il_priv *il = container_of(work, struct il_priv,
txpower_work);
mutex_lock(&il->mutex);
/* If a scan happened to start before we got here
* then just return; the stats notification will
* kick off another scheduled work to compensate for
* any temperature delta we missed here. */
if (test_bit(S_EXIT_PENDING, &il->status) ||
test_bit(S_SCANNING, &il->status))
goto out;
/* Regardless of if we are associated, we must reconfigure the
* TX power since frames can be sent on non-radar channels while
* not associated */
il->ops->send_tx_power(il);
/* Update last_temperature to keep is_calib_needed from running
* when it isn't needed... */
il->last_temperature = il->temperature;
out:
mutex_unlock(&il->mutex);
}
static int
il4965_setup_deferred_work(struct il_priv *il)
{
il->workqueue = create_singlethread_workqueue(DRV_NAME);
if (!il->workqueue)
return -ENOMEM;
init_waitqueue_head(&il->wait_command_queue);
INIT_WORK(&il->restart, il4965_bg_restart);
INIT_WORK(&il->rx_replenish, il4965_bg_rx_replenish);
INIT_WORK(&il->run_time_calib_work, il4965_bg_run_time_calib_work);
INIT_DELAYED_WORK(&il->init_alive_start, il4965_bg_init_alive_start);
INIT_DELAYED_WORK(&il->alive_start, il4965_bg_alive_start);
il_setup_scan_deferred_work(il);
INIT_WORK(&il->txpower_work, il4965_bg_txpower_work);
timer_setup(&il->stats_periodic, il4965_bg_stats_periodic, 0);
timer_setup(&il->watchdog, il_bg_watchdog, 0);
tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet);
return 0;
}
static void
il4965_cancel_deferred_work(struct il_priv *il)
{
cancel_work_sync(&il->txpower_work);
cancel_delayed_work_sync(&il->init_alive_start);
cancel_delayed_work(&il->alive_start);
cancel_work_sync(&il->run_time_calib_work);
il_cancel_scan_deferred_work(il);
del_timer_sync(&il->stats_periodic);
}
static void
il4965_init_hw_rates(struct il_priv *il, struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < RATE_COUNT_LEGACY; i++) {
rates[i].bitrate = il_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on idxes */
rates[i].hw_value_short = i;
rates[i].flags = 0;
if ((i >= IL_FIRST_CCK_RATE) && (i <= IL_LAST_CCK_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |=
(il_rates[i].plcp ==
RATE_1M_PLCP) ? 0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
/*
* Acquire il->lock before calling this function !
*/
void
il4965_set_wr_ptrs(struct il_priv *il, int txq_id, u32 idx)
{
il_wr(il, HBUS_TARG_WRPTR, (idx & 0xff) | (txq_id << 8));
il_wr_prph(il, IL49_SCD_QUEUE_RDPTR(txq_id), idx);
}
void
il4965_tx_queue_set_status(struct il_priv *il, struct il_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, &il->txq_ctx_active_msk) ? 1 : 0;
/* Set up and activate */
il_wr_prph(il, IL49_SCD_QUEUE_STATUS_BITS(txq_id),
(active << IL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(tx_fifo_id << IL49_SCD_QUEUE_STTS_REG_POS_TXF) |
(scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_WSL) |
(scd_retry << IL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
IL49_SCD_QUEUE_STTS_REG_MSK);
txq->sched_retry = scd_retry;
D_INFO("%s %s Queue %d on AC %d\n", active ? "Activate" : "Deactivate",
scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
}
static const struct ieee80211_ops il4965_mac_ops = {
.tx = il4965_mac_tx,
.wake_tx_queue = ieee80211_handle_wake_tx_queue,
.start = il4965_mac_start,
.stop = il4965_mac_stop,
.add_interface = il_mac_add_interface,
.remove_interface = il_mac_remove_interface,
.change_interface = il_mac_change_interface,
.config = il_mac_config,
.configure_filter = il4965_configure_filter,
.set_key = il4965_mac_set_key,
.update_tkip_key = il4965_mac_update_tkip_key,
.conf_tx = il_mac_conf_tx,
.reset_tsf = il_mac_reset_tsf,
.bss_info_changed = il_mac_bss_info_changed,
.ampdu_action = il4965_mac_ampdu_action,
.hw_scan = il_mac_hw_scan,
.sta_add = il4965_mac_sta_add,
.sta_remove = il_mac_sta_remove,
.channel_switch = il4965_mac_channel_switch,
.tx_last_beacon = il_mac_tx_last_beacon,
.flush = il_mac_flush,
};
static int
il4965_init_drv(struct il_priv *il)
{
int ret;
spin_lock_init(&il->sta_lock);
spin_lock_init(&il->hcmd_lock);
INIT_LIST_HEAD(&il->free_frames);
mutex_init(&il->mutex);
il->ieee_channels = NULL;
il->ieee_rates = NULL;
il->band = NL80211_BAND_2GHZ;
il->iw_mode = NL80211_IFTYPE_STATION;
il->current_ht_config.smps = IEEE80211_SMPS_STATIC;
il->missed_beacon_threshold = IL_MISSED_BEACON_THRESHOLD_DEF;
/* initialize force reset */
il->force_reset.reset_duration = IL_DELAY_NEXT_FORCE_FW_RELOAD;
/* Choose which receivers/antennas to use */
if (il->ops->set_rxon_chain)
il->ops->set_rxon_chain(il);
il_init_scan_params(il);
ret = il_init_channel_map(il);
if (ret) {
IL_ERR("initializing regulatory failed: %d\n", ret);
goto err;
}
ret = il_init_geos(il);
if (ret) {
IL_ERR("initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
il4965_init_hw_rates(il, il->ieee_rates);
return 0;
err_free_channel_map:
il_free_channel_map(il);
err:
return ret;
}
static void
il4965_uninit_drv(struct il_priv *il)
{
il_free_geos(il);
il_free_channel_map(il);
kfree(il->scan_cmd);
}
static void
il4965_hw_detect(struct il_priv *il)
{
il->hw_rev = _il_rd(il, CSR_HW_REV);
il->hw_wa_rev = _il_rd(il, CSR_HW_REV_WA_REG);
il->rev_id = il->pci_dev->revision;
D_INFO("HW Revision ID = 0x%X\n", il->rev_id);
}
static const struct il_sensitivity_ranges il4965_sensitivity = {
.min_nrg_cck = 97,
.max_nrg_cck = 0, /* not used, set to 0 */
.auto_corr_min_ofdm = 85,
.auto_corr_min_ofdm_mrc = 170,
.auto_corr_min_ofdm_x1 = 105,
.auto_corr_min_ofdm_mrc_x1 = 220,
.auto_corr_max_ofdm = 120,
.auto_corr_max_ofdm_mrc = 210,
.auto_corr_max_ofdm_x1 = 140,
.auto_corr_max_ofdm_mrc_x1 = 270,
.auto_corr_min_cck = 125,
.auto_corr_max_cck = 200,
.auto_corr_min_cck_mrc = 200,
.auto_corr_max_cck_mrc = 400,
.nrg_th_cck = 100,
.nrg_th_ofdm = 100,
.barker_corr_th_min = 190,
.barker_corr_th_min_mrc = 390,
.nrg_th_cca = 62,
};
static void
il4965_set_hw_params(struct il_priv *il)
{
il->hw_params.bcast_id = IL4965_BROADCAST_ID;
il->hw_params.max_rxq_size = RX_QUEUE_SIZE;
il->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
if (il->cfg->mod_params->amsdu_size_8K)
il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_8K);
else
il->hw_params.rx_page_order = get_order(IL_RX_BUF_SIZE_4K);
il->hw_params.max_beacon_itrvl = IL_MAX_UCODE_BEACON_INTERVAL;
if (il->cfg->mod_params->disable_11n)
il->cfg->sku &= ~IL_SKU_N;
if (il->cfg->mod_params->num_of_queues >= IL_MIN_NUM_QUEUES &&
il->cfg->mod_params->num_of_queues <= IL49_NUM_QUEUES)
il->cfg->num_of_queues =
il->cfg->mod_params->num_of_queues;
il->hw_params.max_txq_num = il->cfg->num_of_queues;
il->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
il->hw_params.scd_bc_tbls_size =
il->cfg->num_of_queues *
sizeof(struct il4965_scd_bc_tbl);
il->hw_params.tfd_size = sizeof(struct il_tfd);
il->hw_params.max_stations = IL4965_STATION_COUNT;
il->hw_params.max_data_size = IL49_RTC_DATA_SIZE;
il->hw_params.max_inst_size = IL49_RTC_INST_SIZE;
il->hw_params.max_bsm_size = BSM_SRAM_SIZE;
il->hw_params.ht40_channel = BIT(NL80211_BAND_5GHZ);
il->hw_params.rx_wrt_ptr_reg = FH49_RSCSR_CHNL0_WPTR;
il->hw_params.tx_chains_num = il4965_num_of_ant(il->cfg->valid_tx_ant);
il->hw_params.rx_chains_num = il4965_num_of_ant(il->cfg->valid_rx_ant);
il->hw_params.valid_tx_ant = il->cfg->valid_tx_ant;
il->hw_params.valid_rx_ant = il->cfg->valid_rx_ant;
il->hw_params.ct_kill_threshold =
celsius_to_kelvin(CT_KILL_THRESHOLD_LEGACY);
il->hw_params.sens = &il4965_sensitivity;
il->hw_params.beacon_time_tsf_bits = IL4965_EXT_BEACON_TIME_POS;
}
static int
il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = 0;
struct il_priv *il;
struct ieee80211_hw *hw;
struct il_cfg *cfg = (struct il_cfg *)(ent->driver_data);
unsigned long flags;
u16 pci_cmd;
/************************
* 1. Allocating HW data
************************/
hw = ieee80211_alloc_hw(sizeof(struct il_priv), &il4965_mac_ops);
if (!hw) {
err = -ENOMEM;
goto out;
}
il = hw->priv;
il->hw = hw;
SET_IEEE80211_DEV(hw, &pdev->dev);
D_INFO("*** LOAD DRIVER ***\n");
il->cfg = cfg;
il->ops = &il4965_ops;
#ifdef CONFIG_IWLEGACY_DEBUGFS
il->debugfs_ops = &il4965_debugfs_ops;
#endif
il->pci_dev = pdev;
il->inta_mask = CSR_INI_SET_MASK;
/**************************
* 2. Initializing PCI bus
**************************/
pci_disable_link_state(pdev,
PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
PCIE_LINK_STATE_CLKPM);
if (pci_enable_device(pdev)) {
err = -ENODEV;
goto out_ieee80211_free_hw;
}
pci_set_master(pdev);
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
if (err) {
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
/* both attempts failed: */
if (err) {
IL_WARN("No suitable DMA available.\n");
goto out_pci_disable_device;
}
}
err = pci_request_regions(pdev, DRV_NAME);
if (err)
goto out_pci_disable_device;
pci_set_drvdata(pdev, il);
/***********************
* 3. Read REV register
***********************/
il->hw_base = pci_ioremap_bar(pdev, 0);
if (!il->hw_base) {
err = -ENODEV;
goto out_pci_release_regions;
}
D_INFO("pci_resource_len = 0x%08llx\n",
(unsigned long long)pci_resource_len(pdev, 0));
D_INFO("pci_resource_base = %p\n", il->hw_base);
/* these spin locks will be used in apm_ops.init and EEPROM access
* we should init now
*/
spin_lock_init(&il->reg_lock);
spin_lock_init(&il->lock);
/*
* stop and reset the on-board processor just in case it is in a
* strange state ... like being left stranded by a primary kernel
* and this is now the kdump kernel trying to start up
*/
_il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
il4965_hw_detect(il);
IL_INFO("Detected %s, REV=0x%X\n", il->cfg->name, il->hw_rev);
/* We disable the RETRY_TIMEOUT register (0x41) to keep
* PCI Tx retries from interfering with C3 CPU state */
pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
il4965_prepare_card_hw(il);
if (!il->hw_ready) {
IL_WARN("Failed, HW not ready\n");
err = -EIO;
goto out_iounmap;
}
/*****************
* 4. Read EEPROM
*****************/
/* Read the EEPROM */
err = il_eeprom_init(il);
if (err) {
IL_ERR("Unable to init EEPROM\n");
goto out_iounmap;
}
err = il4965_eeprom_check_version(il);
if (err)
goto out_free_eeprom;
/* extract MAC Address */
il4965_eeprom_get_mac(il, il->addresses[0].addr);
D_INFO("MAC address: %pM\n", il->addresses[0].addr);
il->hw->wiphy->addresses = il->addresses;
il->hw->wiphy->n_addresses = 1;
/************************
* 5. Setup HW constants
************************/
il4965_set_hw_params(il);
/*******************
* 6. Setup il
*******************/
err = il4965_init_drv(il);
if (err)
goto out_free_eeprom;
/* At this point both hw and il are initialized. */
/********************
* 7. Setup services
********************/
spin_lock_irqsave(&il->lock, flags);
il_disable_interrupts(il);
spin_unlock_irqrestore(&il->lock, flags);
pci_enable_msi(il->pci_dev);
err = request_irq(il->pci_dev->irq, il_isr, IRQF_SHARED, DRV_NAME, il);
if (err) {
IL_ERR("Error allocating IRQ %d\n", il->pci_dev->irq);
goto out_disable_msi;
}
err = il4965_setup_deferred_work(il);
if (err)
goto out_free_irq;
il4965_setup_handlers(il);
/*********************************************
* 8. Enable interrupts and read RFKILL state
*********************************************/
/* enable rfkill interrupt: hw bug w/a */
pci_read_config_word(il->pci_dev, PCI_COMMAND, &pci_cmd);
if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
pci_write_config_word(il->pci_dev, PCI_COMMAND, pci_cmd);
}
il_enable_rfkill_int(il);
/* If platform's RF_KILL switch is NOT set to KILL */
if (_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(S_RFKILL, &il->status);
else
set_bit(S_RFKILL, &il->status);
wiphy_rfkill_set_hw_state(il->hw->wiphy,
test_bit(S_RFKILL, &il->status));
il_power_initialize(il);
init_completion(&il->_4965.firmware_loading_complete);
err = il4965_request_firmware(il, true);
if (err)
goto out_destroy_workqueue;
return 0;
out_destroy_workqueue:
destroy_workqueue(il->workqueue);
il->workqueue = NULL;
out_free_irq:
free_irq(il->pci_dev->irq, il);
out_disable_msi:
pci_disable_msi(il->pci_dev);
il4965_uninit_drv(il);
out_free_eeprom:
il_eeprom_free(il);
out_iounmap:
iounmap(il->hw_base);
out_pci_release_regions:
pci_release_regions(pdev);
out_pci_disable_device:
pci_disable_device(pdev);
out_ieee80211_free_hw:
ieee80211_free_hw(il->hw);
out:
return err;
}
static void
il4965_pci_remove(struct pci_dev *pdev)
{
struct il_priv *il = pci_get_drvdata(pdev);
unsigned long flags;
if (!il)
return;
wait_for_completion(&il->_4965.firmware_loading_complete);
D_INFO("*** UNLOAD DRIVER ***\n");
il_dbgfs_unregister(il);
sysfs_remove_group(&pdev->dev.kobj, &il_attribute_group);
/* ieee80211_unregister_hw call wil cause il_mac_stop to
* be called and il4965_down since we are removing the device
* we need to set S_EXIT_PENDING bit.
*/
set_bit(S_EXIT_PENDING, &il->status);
il_leds_exit(il);
if (il->mac80211_registered) {
ieee80211_unregister_hw(il->hw);
il->mac80211_registered = 0;
} else {
il4965_down(il);
}
/*
* Make sure device is reset to low power before unloading driver.
* This may be redundant with il4965_down(), but there are paths to
* run il4965_down() without calling apm_ops.stop(), and there are
* paths to avoid running il4965_down() at all before leaving driver.
* This (inexpensive) call *makes sure* device is reset.
*/
il_apm_stop(il);
/* make sure we flush any pending irq or
* tasklet for the driver
*/
spin_lock_irqsave(&il->lock, flags);
il_disable_interrupts(il);
spin_unlock_irqrestore(&il->lock, flags);
il4965_synchronize_irq(il);
il4965_dealloc_ucode_pci(il);
if (il->rxq.bd)
il4965_rx_queue_free(il, &il->rxq);
il4965_hw_txq_ctx_free(il);
il_eeprom_free(il);
/*netif_stop_queue(dev); */
/* ieee80211_unregister_hw calls il_mac_stop, which flushes
* il->workqueue... so we can't take down the workqueue
* until now... */
destroy_workqueue(il->workqueue);
il->workqueue = NULL;
free_irq(il->pci_dev->irq, il);
pci_disable_msi(il->pci_dev);
iounmap(il->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
il4965_uninit_drv(il);
dev_kfree_skb(il->beacon_skb);
ieee80211_free_hw(il->hw);
}
/*
* Activate/Deactivate Tx DMA/FIFO channels according tx fifos mask
* must be called under il->lock and mac access
*/
void
il4965_txq_set_sched(struct il_priv *il, u32 mask)
{
il_wr_prph(il, IL49_SCD_TXFACT, mask);
}
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
/* Hardware specific file defines the PCI IDs table for that hardware module */
static const struct pci_device_id il4965_hw_card_ids[] = {
{IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
{IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
{0}
};
MODULE_DEVICE_TABLE(pci, il4965_hw_card_ids);
static struct pci_driver il4965_driver = {
.name = DRV_NAME,
.id_table = il4965_hw_card_ids,
.probe = il4965_pci_probe,
.remove = il4965_pci_remove,
.driver.pm = IL_LEGACY_PM_OPS,
};
static int __init
il4965_init(void)
{
int ret;
pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
pr_info(DRV_COPYRIGHT "\n");
ret = il4965_rate_control_register();
if (ret) {
pr_err("Unable to register rate control algorithm: %d\n", ret);
return ret;
}
ret = pci_register_driver(&il4965_driver);
if (ret) {
pr_err("Unable to initialize PCI module\n");
goto error_register;
}
return ret;
error_register:
il4965_rate_control_unregister();
return ret;
}
static void __exit
il4965_exit(void)
{
pci_unregister_driver(&il4965_driver);
il4965_rate_control_unregister();
}
module_exit(il4965_exit);
module_init(il4965_init);
#ifdef CONFIG_IWLEGACY_DEBUG
module_param_named(debug, il_debug_level, uint, 0644);
MODULE_PARM_DESC(debug, "debug output mask");
#endif
module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, 0444);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(queues_num, il4965_mod_params.num_of_queues, int, 0444);
MODULE_PARM_DESC(queues_num, "number of hw queues.");
module_param_named(11n_disable, il4965_mod_params.disable_11n, int, 0444);
MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K, int, 0444);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size (default 0 [disabled])");
module_param_named(fw_restart, il4965_mod_params.restart_fw, int, 0444);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");