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gerrit-public.fairphone.software / kernel / msm-4.9 / db54eb57ce5edeebd621b12e23f3e1cdea7fe3ee / . / drivers / net / wireless / iwlegacy / iwl4965-base.c
blob: 0f7d44c95f08c862442d99a851f288e0fe11c467 [file] [log] [blame]
/******************************************************************************
*
* 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.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* 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/pci-aspm.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 <net/mac80211.h>
#include <asm/div64.h>
#define DRV_NAME "iwl4965"
#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-sta.h"
#include "iwl-4965-calib.h"
#include "iwl-4965.h"
#include "iwl-4965-led.h"
/******************************************************************************
*
* module boiler plate
*
******************************************************************************/
/*
* module name, copyright, version, etc.
*/
#define DRV_DESCRIPTION "Intel(R) Wireless WiFi 4965 driver for Linux"
#ifdef CONFIG_IWLWIFI_LEGACY_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_update_chain_flags(struct il_priv *il)
{
struct il_rxon_context *ctx;
if (il->cfg->ops->hcmd->set_rxon_chain) {
for_each_context(il, ctx) {
il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
if (ctx->active.rx_chain != ctx->staging.rx_chain)
il_commit_rxon(il, ctx);
}
}
}
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 index 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_ctx) {
IL_ERR("trying to build beacon w/o beacon context!\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->beacon_ctx->bcast_sta_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, il->beacon_ctx);
il->mgmt_tx_ant = il4965_toggle_tx_ant(il, il->mgmt_tx_ant,
il->hw_params.valid_tx_ant);
rate_flags = il4965_ant_idx_to_flags(il->mgmt_tx_ant);
if ((rate >= IL_FIRST_CCK_RATE) && (rate <= IL_LAST_CCK_RATE))
rate_flags |= RATE_MCS_CCK_MSK;
tx_beacon_cmd->tx.rate_n_flags = il4965_hw_set_rate_n_flags(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, REPLY_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]
* @il - driver ilate data
* @txq - tx queue
*
* Does NOT advance any TFD circular buffer read/write indexes
* 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 index = txq->q.read_ptr;
int i;
int num_tbs;
tfd = &tfd_tmp[index];
/* 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)
pci_unmap_single(dev,
dma_unmap_addr(&txq->meta[index], mapping),
dma_unmap_len(&txq->meta[index], len),
PCI_DMA_BIDIRECTIONAL);
/* Unmap chunks, if any. */
for (i = 1; i < num_tbs; i++)
pci_unmap_single(dev, il4965_tfd_tb_get_addr(tfd, i),
il4965_tfd_tb_get_len(tfd, i),
PCI_DMA_TODEVICE);
/* free SKB */
if (txq->txb) {
struct sk_buff *skb;
skb = txq->txb[txq->q.read_ptr].skb;
/* can be called from irqs-disabled context */
if (skb) {
dev_kfree_skb_any(skb);
txq->txb[txq->q.read_ptr].skb = 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, FH_MEM_CBBC_QUEUE(txq_id),
txq->q.dma_addr >> 8);
return 0;
}
/******************************************************************************
*
* Generic RX handler implementations
*
******************************************************************************/
static void il4965_rx_reply_alive(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
struct il_rx_packet *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.alive_frame,
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_statistics_periodic - Timer callback to queue statistics
*
* This callback is provided in order to send a statistics request.
*
* This timer function is continually reset to execute within
* REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
* was received. We need to ensure we receive the statistics in order
* to update the temperature used for calibrating the TXPOWER.
*/
static void il4965_bg_statistics_periodic(unsigned long data)
{
struct il_priv *il = (struct il_priv *)data;
if (test_bit(STATUS_EXIT_PENDING, &il->status))
return;
/* dont send host command if rf-kill is on */
if (!il_is_ready_rf(il))
return;
il_send_statistics_request(il, CMD_ASYNC, false);
}
static void il4965_rx_beacon_notif(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
struct il_rx_packet *pkt = rxb_addr(rxb);
struct il4965_beacon_notif *beacon =
(struct il4965_beacon_notif *)pkt->u.raw;
#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
u8 rate = il4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
D_RX("beacon status %x retries %d iss %d "
"tsf %d %d 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 (!_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_rx_card_state_notif(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
struct il_rx_packet *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(STATUS_RF_KILL_HW, &il->status);
else
clear_bit(STATUS_RF_KILL_HW, &il->status);
if (!(flags & RXON_CARD_DISABLED))
il_scan_cancel(il);
if ((test_bit(STATUS_RF_KILL_HW, &status) !=
test_bit(STATUS_RF_KILL_HW, &il->status)))
wiphy_rfkill_set_hw_state(il->hw->wiphy,
test_bit(STATUS_RF_KILL_HW, &il->status));
else
wake_up(&il->wait_command_queue);
}
/**
* il4965_setup_rx_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_rx_handlers(struct il_priv *il)
{
il->rx_handlers[REPLY_ALIVE] = il4965_rx_reply_alive;
il->rx_handlers[REPLY_ERROR] = il_rx_reply_error;
il->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = il_rx_csa;
il->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
il_rx_spectrum_measure_notif;
il->rx_handlers[PM_SLEEP_NOTIFICATION] = il_rx_pm_sleep_notif;
il->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
il_rx_pm_debug_statistics_notif;
il->rx_handlers[BEACON_NOTIFICATION] = il4965_rx_beacon_notif;
/*
* The same handler is used for both the REPLY to a discrete
* statistics request from the host as well as for the periodic
* statistics notifications (after received beacons) from the uCode.
*/
il->rx_handlers[REPLY_STATISTICS_CMD] = il4965_reply_statistics;
il->rx_handlers[STATISTICS_NOTIFICATION] = il4965_rx_statistics;
il_setup_rx_scan_handlers(il);
/* status change handler */
il->rx_handlers[CARD_STATE_NOTIFICATION] =
il4965_rx_card_state_notif;
il->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
il4965_rx_missed_beacon_notif;
/* Rx handlers */
il->rx_handlers[REPLY_RX_PHY_CMD] = il4965_rx_reply_rx_phy;
il->rx_handlers[REPLY_RX_MPDU_CMD] = il4965_rx_reply_rx;
/* block ack */
il->rx_handlers[REPLY_COMPRESSED_BA] = il4965_rx_reply_compressed_ba;
/* Set up hardware specific Rx handlers */
il->cfg->ops->lib->rx_handler_setup(il);
}
/**
* il4965_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the il->rx_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_mem_buffer *rxb;
struct il_rx_packet *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 index (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;
pci_unmap_page(il->pci_dev, rxb->page_dma,
PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
pkt = rxb_addr(rxb);
len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
len += sizeof(u32); /* account for status word */
/* Reclaim a command buffer only if this packet is a response
* to a (driver-originated) command.
* If the packet (e.g. Rx frame) originated from uCode,
* there is no command buffer to reclaim.
* Ucode should set SEQ_RX_FRAME bit if ucode-originated,
* but apparently a few don't get set; catch them here. */
reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
(pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
(pkt->hdr.cmd != REPLY_RX) &&
(pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
(pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
(pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
(pkt->hdr.cmd != REPLY_TX);
/* Based on type of command response or notification,
* handle those that need handling via function in
* rx_handlers table. See il4965_setup_rx_handlers() */
if (il->rx_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.rx_handlers[pkt->hdr.cmd]++;
il->rx_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 rx_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 = pci_map_page(il->pci_dev, rxb->page,
0, PAGE_SIZE << il->hw_params.rx_page_order,
PCI_DMA_FROMDEVICE);
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 il_priv *il)
{
u32 inta, handled = 0;
u32 inta_fh;
unsigned long flags;
u32 i;
#ifdef CONFIG_IWLWIFI_LEGACY_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_IWLWIFI_LEGACY_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_IWLWIFI_LEGACY_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 (!test_bit(STATUS_ALIVE, &il->status)) {
if (hw_rf_kill)
set_bit(STATUS_RF_KILL_HW, &il->status);
else
clear_bit(STATUS_RF_KILL_HW, &il->status);
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 FH_INT = 0x%08x\n", inta_fh);
}
/* Re-enable all interrupts */
/* only Re-enable if disabled by irq */
if (test_bit(STATUS_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_IWLWIFI_LEGACY_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_IWLWIFI_LEGACY_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 = strict_strtoul(buf, 0, &val);
if (ret)
IL_ERR("%s is not in hex or decimal form.\n", buf);
else {
il->debug_level = val;
if (il_alloc_traffic_mem(il))
IL_ERR(
"Not enough memory to generate traffic log\n");
}
return strnlen(buf, count);
}
static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
il4965_show_debug_level, il4965_store_debug_level);
#endif /* CONFIG_IWLWIFI_LEGACY_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, S_IRUGO, 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 = strict_strtoul(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%d).\n",
ret);
else
ret = count;
}
return ret;
}
static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO,
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_IWLWIFI_LEGACY_DEBUG
&dev_attr_debug_level.attr,
#endif
NULL
};
static 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_index = il->cfg->ucode_api_max;
sprintf(tag, "%d", il->fw_index);
} else {
il->fw_index--;
sprintf(tag, "%d", il->fw_index);
}
if (il->fw_index < 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;
struct il_ucode_header *ucode;
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_index <= 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 */
ucode = (struct il_ucode_header *)ucode_raw->data;
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;
err = il_dbgfs_register(il, DRV_NAME);
if (err)
IL_ERR(
"failed to create debugfs files. Ignoring error: %d\n", err);
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_STABLE",
"FH_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->cfg->ops->lib->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, REPLY_CT_KILL_CONFIG_CMD,
sizeof(cmd), &cmd);
if (ret)
IL_ERR("REPLY_CT_KILL_CONFIG_CMD failed\n");
else
D_INFO("REPLY_CT_KILL_CONFIG_CMD "
"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,
IWL49_CMD_FIFO_NUM,
IL_TX_FIFO_UNUSED,
IL_TX_FIFO_UNUSED,
};
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,
IWL49_SCD_SRAM_BASE_ADDR);
a = il->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
for (; a < il->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
il_write_targ_mem(il, a, 0);
for (; a < il->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
il_write_targ_mem(il, a, 0);
for (; a < il->scd_base_addr +
IWL49_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, IWL49_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,
FH_TCSR_CHNL_TX_CONFIG_REG(chan),
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE);
/* Update FH chicken bits */
reg_val = il_rd(il, FH_TX_CHICKEN_BITS_REG);
il_wr(il, FH_TX_CHICKEN_BITS_REG,
reg_val | FH_TX_CHICKEN_BITS_SCD_AUTO_RETRY_EN);
/* Disable chain mode for all queues */
il_wr_prph(il, IWL49_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 indexes */
il_wr_prph(il, IWL49_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 +
IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
(SCD_WIN_SIZE <<
IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
/* Frame limit */
il_write_targ_mem(il, il->scd_base_addr +
IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
sizeof(u32),
(SCD_FRAME_LIMIT <<
IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
}
il_wr_prph(il, IWL49_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 REPLY_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;
struct il_rxon_context *ctx = &il->contexts[IL_RXON_CTX_BSS];
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(STATUS_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 = IL_RATES_MASK;
if (il_is_associated_ctx(ctx)) {
struct il_rxon_cmd *active_rxon =
(struct il_rxon_cmd *)&ctx->active;
/* apply any changes in staging */
ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
} else {
struct il_rxon_context *tmp;
/* Initialize our rx_config data */
for_each_context(il, tmp)
il_connection_init_rx_config(il, tmp);
if (il->cfg->ops->hcmd->set_rxon_chain)
il->cfg->ops->hcmd->set_rxon_chain(il, ctx);
}
/* Configure bluetooth coexistence if enabled */
il_send_bt_config(il);
il4965_reset_run_time_calib(il);
set_bit(STATUS_READY, &il->status);
/* Configure the adapter for unassociated operation */
il_commit_rxon(il, ctx);
/* 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);
il_power_update_mode(il, true);
D_INFO("Updated power mode\n");
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(STATUS_EXIT_PENDING, &il->status);
/* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
* to prevent rearm timer */
del_timer_sync(&il->watchdog);
il_clear_ucode_stations(il, NULL);
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(STATUS_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(STATUS_RF_KILL_HW, &il->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_GEO_CONFIGURED, &il->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_EXIT_PENDING, &il->status) <<
STATUS_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(STATUS_RF_KILL_HW, &il->status) <<
STATUS_RF_KILL_HW |
test_bit(STATUS_GEO_CONFIGURED, &il->status) <<
STATUS_GEO_CONFIGURED |
test_bit(STATUS_FW_ERROR, &il->status) <<
STATUS_FW_ERROR |
test_bit(STATUS_EXIT_PENDING, &il->status) <<
STATUS_EXIT_PENDING;
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);
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);
}
#define HW_READY_TIMEOUT (50)
static int il4965_set_hw_ready(struct il_priv *il)
{
int ret = 0;
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,
HW_READY_TIMEOUT);
if (ret != -ETIMEDOUT)
il->hw_ready = true;
else
il->hw_ready = false;
D_INFO("hardware %s\n",
(il->hw_ready == 1) ? "ready" : "not ready");
return ret;
}
static int il4965_prepare_card_hw(struct il_priv *il)
{
int ret = 0;
D_INFO("il4965_prepare_card_hw enter\n");
ret = il4965_set_hw_ready(il);
if (il->hw_ready)
return ret;
/* 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);
return ret;
}
#define MAX_HW_RESTARTS 5
static int __il4965_up(struct il_priv *il)
{
struct il_rxon_context *ctx;
int i;
int ret;
if (test_bit(STATUS_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;
}
for_each_context(il, ctx) {
ret = il4965_alloc_bcast_station(il, ctx);
if (ret) {
il_dealloc_bcast_stations(il);
return ret;
}
}
il4965_prepare_card_hw(il);
if (!il->hw_ready) {
IL_WARN("Exit 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(STATUS_RF_KILL_HW, &il->status);
else
set_bit(STATUS_RF_KILL_HW, &il->status);
if (il_is_rfkill(il)) {
wiphy_rfkill_set_hw_state(il->hw->wiphy, true);
il_enable_interrupts(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");
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->cfg->ops->lib->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(STATUS_EXIT_PENDING, &il->status);
__il4965_down(il);
clear_bit(STATUS_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(STATUS_EXIT_PENDING, &il->status))
goto out;
il->cfg->ops->lib->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(STATUS_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(STATUS_EXIT_PENDING, &il->status) ||
test_bit(STATUS_SCANNING, &il->status)) {
mutex_unlock(&il->mutex);
return;
}
if (il->start_calib) {
il4965_chain_noise_calibration(il,
(void *)&il->_4965.statistics);
il4965_sensitivity_calibration(il,
(void *)&il->_4965.statistics);
}
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(STATUS_EXIT_PENDING, &il->status))
return;
if (test_and_clear_bit(STATUS_FW_ERROR, &il->status)) {
struct il_rxon_context *ctx;
mutex_lock(&il->mutex);
for_each_context(il, ctx)
ctx->vif = NULL;
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(STATUS_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(STATUS_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;
struct il_rxon_context *ctx;
hw->rate_control_algorithm = "iwl-4965-rs";
/* Tell mac80211 our characteristics */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_AMPDU_AGGREGATION |
IEEE80211_HW_NEED_DTIM_PERIOD |
IEEE80211_HW_SPECTRUM_MGMT |
IEEE80211_HW_REPORTS_TX_ACK_STATUS;
if (il->cfg->sku & IL_SKU_N)
hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
IEEE80211_HW_SUPPORTS_STATIC_SMPS;
hw->sta_data_size = sizeof(struct il_station_priv);
hw->vif_data_size = sizeof(struct il_vif_priv);
for_each_context(il, ctx) {
hw->wiphy->interface_modes |= ctx->interface_modes;
hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
}
hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
WIPHY_FLAG_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[IEEE80211_BAND_2GHZ].n_channels)
il->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&il->bands[IEEE80211_BAND_2GHZ];
if (il->bands[IEEE80211_BAND_5GHZ].n_channels)
il->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&il->bands[IEEE80211_BAND_5GHZ];
il_leds_init(il);
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(STATUS_READY, &il->status),
UCODE_READY_TIMEOUT);
if (!ret) {
if (!test_bit(STATUS_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 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, 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;
struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
D_MAC80211("enter\n");
il4965_update_tkip_key(il, vif_priv->ctx, 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;
struct il_vif_priv *vif_priv = (void *)vif->drv_priv;
struct il_rxon_context *ctx = vif_priv->ctx;
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;
}
sta_id = il_sta_id_or_broadcast(il, vif_priv->ctx, 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 = !ctx->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,
vif_priv->ctx, key);
else
ret = il4965_set_dynamic_key(il, vif_priv->ctx,
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, ctx, key);
else
ret = il4965_remove_dynamic_key(il, ctx,
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,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta, u16 tid, u16 *ssn,
u8 buf_size)
{
struct il_priv *il = hw->priv;
int ret = -EINVAL;
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(STATUS_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:
D_HT("stop Tx\n");
ret = il4965_tx_agg_stop(il, vif, sta, tid);
if (test_bit(STATUS_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;
struct il_vif_priv *vif_priv = (void *)vif->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, vif_priv->ctx, 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_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->channel;
struct il_ht_config *ht_conf = &il->current_ht_config;
struct il_rxon_context *ctx = &il->contexts[IL_RXON_CTX_BSS];
u16 ch;
D_MAC80211("enter\n");
mutex_lock(&il->mutex);
if (il_is_rfkill(il))
goto out;
if (test_bit(STATUS_EXIT_PENDING, &il->status) ||
test_bit(STATUS_SCANNING, &il->status) ||
test_bit(STATUS_CHANNEL_SWITCH_PENDING, &il->status))
goto out;
if (!il_is_associated_ctx(ctx))
goto out;
if (!il->cfg->ops->lib->set_channel_switch)
goto out;
ch = channel->hw_value;
if (le16_to_cpu(ctx->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 */
ctx->ht.enabled = conf_is_ht(conf);
if (ctx->ht.enabled) {
if (conf_is_ht40_minus(conf)) {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_BELOW;
ctx->ht.is_40mhz = true;
} else if (conf_is_ht40_plus(conf)) {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
ctx->ht.is_40mhz = true;
} else {
ctx->ht.extension_chan_offset =
IEEE80211_HT_PARAM_CHA_SEC_NONE;
ctx->ht.is_40mhz = false;
}
} else
ctx->ht.is_40mhz = false;
if ((le16_to_cpu(ctx->staging.channel) != ch))
ctx->staging.flags = 0;
il_set_rxon_channel(il, channel, ctx);
il_set_rxon_ht(il, ht_conf);
il_set_flags_for_band(il, ctx, channel->band, ctx->vif);
spin_unlock_irq(&il->lock);
il_set_rate(il);
/*
* at this point, staging_rxon has the
* configuration for channel switch
*/
set_bit(STATUS_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = cpu_to_le16(ch);
if (il->cfg->ops->lib->set_channel_switch(il, ch_switch)) {
clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &il->status);
il->switch_channel = 0;
ieee80211_chswitch_done(ctx->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;
struct il_rxon_context *ctx;
#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 | FIF_PROMISC_IN_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);
for_each_context(il, ctx) {
ctx->staging.filter_flags &= ~filter_nand;
ctx->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_PROMISC_IN_BSS |
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 statistics notification will
* kick off another scheduled work to compensate for
* any temperature delta we missed here. */
if (test_bit(STATUS_EXIT_PENDING, &il->status) ||
test_bit(STATUS_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->cfg->ops->lib->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 void il4965_setup_deferred_work(struct il_priv *il)
{
il->workqueue = create_singlethread_workqueue(DRV_NAME);
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);
init_timer(&il->statistics_periodic);
il->statistics_periodic.data = (unsigned long)il;
il->statistics_periodic.function = il4965_bg_statistics_periodic;
init_timer(&il->watchdog);
il->watchdog.data = (unsigned long)il;
il->watchdog.function = il_bg_watchdog;
tasklet_init(&il->irq_tasklet, (void (*)(unsigned long))
il4965_irq_tasklet, (unsigned long)il);
}
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->statistics_periodic);
}
static void il4965_init_hw_rates(struct il_priv *il,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IL_RATE_COUNT_LEGACY; i++) {
rates[i].bitrate = il_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on indexes */
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 == IL_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 index)
{
il_wr(il, HBUS_TARG_WRPTR,
(index & 0xff) | (txq_id << 8));
il_wr_prph(il, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
}
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, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
(active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
(tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
(scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
(scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
IWL49_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 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 = IEEE80211_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->cfg->ops->hcmd->set_rxon_chain)
il->cfg->ops->hcmd->set_rxon_chain(il,
&il->contexts[IL_RXON_CTX_BSS]);
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)
{
il4965_calib_free_results(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 int il4965_set_hw_params(struct il_priv *il)
{
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;
/* Device-specific setup */
return il->cfg->ops->lib->set_hw_params(il);
}
static const u8 il4965_bss_ac_to_fifo[] = {
IL_TX_FIFO_VO,
IL_TX_FIFO_VI,
IL_TX_FIFO_BE,
IL_TX_FIFO_BK,
};
static const u8 il4965_bss_ac_to_queue[] = {
0, 1, 2, 3,
};
static int
il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = 0, i;
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 = il_alloc_all(cfg);
if (!hw) {
err = -ENOMEM;
goto out;
}
il = hw->priv;
/* At this point both hw and il are allocated. */
/*
* The default context is always valid,
* more may be discovered when firmware
* is loaded.
*/
il->valid_contexts = BIT(IL_RXON_CTX_BSS);
for (i = 0; i < NUM_IL_RXON_CTX; i++)
il->contexts[i].ctxid = i;
il->contexts[IL_RXON_CTX_BSS].always_active = true;
il->contexts[IL_RXON_CTX_BSS].is_active = true;
il->contexts[IL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
il->contexts[IL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
il->contexts[IL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
il->contexts[IL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
il->contexts[IL_RXON_CTX_BSS].ap_sta_id = IL_AP_ID;
il->contexts[IL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
il->contexts[IL_RXON_CTX_BSS].ac_to_fifo = il4965_bss_ac_to_fifo;
il->contexts[IL_RXON_CTX_BSS].ac_to_queue = il4965_bss_ac_to_queue;
il->contexts[IL_RXON_CTX_BSS].exclusive_interface_modes =
BIT(NL80211_IFTYPE_ADHOC);
il->contexts[IL_RXON_CTX_BSS].interface_modes =
BIT(NL80211_IFTYPE_STATION);
il->contexts[IL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
il->contexts[IL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
il->contexts[IL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
il->contexts[IL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
BUILD_BUG_ON(NUM_IL_RXON_CTX != 1);
SET_IEEE80211_DEV(hw, &pdev->dev);
D_INFO("*** LOAD DRIVER ***\n");
il->cfg = cfg;
il->pci_dev = pdev;
il->inta_mask = CSR_INI_SET_MASK;
if (il_alloc_traffic_mem(il))
IL_ERR("Not enough memory to generate traffic log\n");
/**************************
* 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
if (!err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
if (err) {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (!err)
err = pci_set_consistent_dma_mask(pdev,
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_iomap(pdev, 0, 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");
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;
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
************************/
if (il4965_set_hw_params(il)) {
IL_ERR("failed to set hw parameters\n");
goto out_free_eeprom;
}
/*******************
* 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;
}
il4965_setup_deferred_work(il);
il4965_setup_rx_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(STATUS_RF_KILL_HW, &il->status);
else
set_bit(STATUS_RF_KILL_HW, &il->status);
wiphy_rfkill_set_hw_state(il->hw->wiphy,
test_bit(STATUS_RF_KILL_HW, &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;
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:
pci_iounmap(pdev, il->hw_base);
out_pci_release_regions:
pci_set_drvdata(pdev, NULL);
pci_release_regions(pdev);
out_pci_disable_device:
pci_disable_device(pdev);
out_ieee80211_free_hw:
il_free_traffic_mem(il);
ieee80211_free_hw(il->hw);
out:
return err;
}
static void __devexit 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
* to be called and il4965_down since we are removing the device
* we need to set STATUS_EXIT_PENDING bit.
*/
set_bit(STATUS_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); */
flush_workqueue(il->workqueue);
/* 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;
il_free_traffic_mem(il);
free_irq(il->pci_dev->irq, il);
pci_disable_msi(il->pci_dev);
pci_iounmap(pdev, il->hw_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
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, IWL49_SCD_TXFACT, mask);
}
/*****************************************************************************
*
* driver and module entry point
*
*****************************************************************************/
/* Hardware specific file defines the PCI IDs table for that hardware module */
static DEFINE_PCI_DEVICE_TABLE(il4965_hw_card_ids) = {
#if defined(CONFIG_IWL4965_MODULE) || defined(CONFIG_IWL4965)
{IL_PCI_DEVICE(0x4229, PCI_ANY_ID, il4965_cfg)},
{IL_PCI_DEVICE(0x4230, PCI_ANY_ID, il4965_cfg)},
#endif /* CONFIG_IWL4965 */
{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 = __devexit_p(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_IWLWIFI_LEGACY_DEBUG
module_param_named(debug, il_debug_level, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "debug output mask");
#endif
module_param_named(swcrypto, il4965_mod_params.sw_crypto, int, S_IRUGO);
MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
module_param_named(queues_num, il4965_mod_params.num_of_queues, int, S_IRUGO);
MODULE_PARM_DESC(queues_num, "number of hw queues.");
module_param_named(11n_disable, il4965_mod_params.disable_11n, int, S_IRUGO);
MODULE_PARM_DESC(11n_disable, "disable 11n functionality");
module_param_named(amsdu_size_8K, il4965_mod_params.amsdu_size_8K,
int, S_IRUGO);
MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
module_param_named(fw_restart, il4965_mod_params.restart_fw, int, S_IRUGO);
MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");