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path: root/drivers/net/wireless/iwlwifi/iwl-agn.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn.c')
-rw-r--r--drivers/net/wireless/iwlwifi/iwl-agn.c355
1 files changed, 299 insertions, 56 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 596977d71c9..0a5507cbeb3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -503,24 +503,12 @@ int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
int iwl_hw_tx_queue_init(struct iwl_priv *priv,
struct iwl_tx_queue *txq)
{
- int ret;
- unsigned long flags;
int txq_id = txq->q.id;
- spin_lock_irqsave(&priv->lock, flags);
- ret = iwl_grab_nic_access(priv);
- if (ret) {
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
- }
-
/* Circular buffer (TFD queue in DRAM) physical base address */
iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
txq->q.dma_addr >> 8);
- iwl_release_nic_access(priv);
- spin_unlock_irqrestore(&priv->lock, flags);
-
return 0;
}
@@ -709,6 +697,7 @@ static void iwl_rx_card_state_notif(struct iwl_priv *priv,
struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
unsigned long status = priv->status;
+ unsigned long reg_flags;
IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
(flags & HW_CARD_DISABLED) ? "Kill" : "On",
@@ -720,32 +709,25 @@ static void iwl_rx_card_state_notif(struct iwl_priv *priv,
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
- if (!iwl_grab_nic_access(priv)) {
- iwl_write_direct32(
- priv, HBUS_TARG_MBX_C,
- HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
-
- iwl_release_nic_access(priv);
- }
+ iwl_write_direct32(priv, HBUS_TARG_MBX_C,
+ HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
if (!(flags & RXON_CARD_DISABLED)) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
- if (!iwl_grab_nic_access(priv)) {
- iwl_write_direct32(
- priv, HBUS_TARG_MBX_C,
+ iwl_write_direct32(priv, HBUS_TARG_MBX_C,
HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
- iwl_release_nic_access(priv);
- }
}
if (flags & RF_CARD_DISABLED) {
iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
iwl_read32(priv, CSR_UCODE_DRV_GP1);
+ spin_lock_irqsave(&priv->reg_lock, reg_flags);
if (!iwl_grab_nic_access(priv))
iwl_release_nic_access(priv);
+ spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
}
}
@@ -774,14 +756,6 @@ static void iwl_rx_card_state_notif(struct iwl_priv *priv,
int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
{
- int ret;
- unsigned long flags;
-
- spin_lock_irqsave(&priv->lock, flags);
- ret = iwl_grab_nic_access(priv);
- if (ret)
- goto err;
-
if (src == IWL_PWR_SRC_VAUX) {
if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
@@ -793,10 +767,7 @@ int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
~APMG_PS_CTRL_MSK_PWR_SRC);
}
- iwl_release_nic_access(priv);
-err:
- spin_unlock_irqrestore(&priv->lock, flags);
- return ret;
+ return 0;
}
/**
@@ -860,6 +831,7 @@ void iwl_rx_handle(struct iwl_priv *priv)
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). */
@@ -870,7 +842,12 @@ void iwl_rx_handle(struct iwl_priv *priv)
if (i == r)
IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
- if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
+ /* calculate total frames need to be restock after handling RX */
+ total_empty = r - priv->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) {
@@ -947,7 +924,7 @@ void iwl_rx_handle(struct iwl_priv *priv)
count++;
if (count >= 8) {
priv->rxq.read = i;
- iwl_rx_queue_restock(priv);
+ iwl_rx_replenish_now(priv);
count = 0;
}
}
@@ -955,7 +932,10 @@ void iwl_rx_handle(struct iwl_priv *priv)
/* Backtrack one entry */
priv->rxq.read = i;
- iwl_rx_queue_restock(priv);
+ if (fill_rx)
+ iwl_rx_replenish_now(priv);
+ else
+ iwl_rx_queue_restock(priv);
}
/* call this function to flush any scheduled tasklet */
@@ -966,7 +946,7 @@ static inline void iwl_synchronize_irq(struct iwl_priv *priv)
tasklet_kill(&priv->irq_tasklet);
}
-static void iwl_irq_tasklet(struct iwl_priv *priv)
+static void iwl_irq_tasklet_legacy(struct iwl_priv *priv)
{
u32 inta, handled = 0;
u32 inta_fh;
@@ -1127,9 +1107,9 @@ static void iwl_irq_tasklet(struct iwl_priv *priv)
priv->isr_stats.unhandled++;
}
- if (inta & ~CSR_INI_SET_MASK) {
+ if (inta & ~(priv->inta_mask)) {
IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
- inta & ~CSR_INI_SET_MASK);
+ inta & ~priv->inta_mask);
IWL_WARN(priv, " with FH_INT = 0x%08x\n", inta_fh);
}
@@ -1150,6 +1130,199 @@ static void iwl_irq_tasklet(struct iwl_priv *priv)
spin_unlock_irqrestore(&priv->lock, flags);
}
+/* tasklet for iwlagn interrupt */
+static void iwl_irq_tasklet(struct iwl_priv *priv)
+{
+ u32 inta = 0;
+ u32 handled = 0;
+ unsigned long flags;
+#ifdef CONFIG_IWLWIFI_DEBUG
+ u32 inta_mask;
+#endif
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ /* Ack/clear/reset pending uCode interrupts.
+ * Note: Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
+ */
+ iwl_write32(priv, CSR_INT, priv->inta);
+
+ inta = priv->inta;
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+ if (priv->debug_level & IWL_DL_ISR) {
+ /* just for debug */
+ inta_mask = iwl_read32(priv, CSR_INT_MASK);
+ IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x\n ",
+ inta, inta_mask);
+ }
+#endif
+ /* saved interrupt in inta variable now we can reset priv->inta */
+ priv->inta = 0;
+
+ /* Now service all interrupt bits discovered above. */
+ if (inta & CSR_INT_BIT_HW_ERR) {
+ IWL_ERR(priv, "Microcode HW error detected. Restarting.\n");
+
+ /* Tell the device to stop sending interrupts */
+ iwl_disable_interrupts(priv);
+
+ priv->isr_stats.hw++;
+ iwl_irq_handle_error(priv);
+
+ handled |= CSR_INT_BIT_HW_ERR;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return;
+ }
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+ if (priv->debug_level & (IWL_DL_ISR)) {
+ /* NIC fires this, but we don't use it, redundant with WAKEUP */
+ if (inta & CSR_INT_BIT_SCD) {
+ IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
+ "the frame/frames.\n");
+ priv->isr_stats.sch++;
+ }
+
+ /* Alive notification via Rx interrupt will do the real work */
+ if (inta & CSR_INT_BIT_ALIVE) {
+ IWL_DEBUG_ISR(priv, "Alive interrupt\n");
+ priv->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 (!(iwl_read32(priv, CSR_GP_CNTRL) &
+ CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
+ hw_rf_kill = 1;
+
+ IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
+ hw_rf_kill ? "disable radio" : "enable radio");
+
+ priv->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, &priv->status)) {
+ if (hw_rf_kill)
+ set_bit(STATUS_RF_KILL_HW, &priv->status);
+ else
+ clear_bit(STATUS_RF_KILL_HW, &priv->status);
+ queue_work(priv->workqueue, &priv->rf_kill);
+ }
+
+ handled |= CSR_INT_BIT_RF_KILL;
+ }
+
+ /* Chip got too hot and stopped itself */
+ if (inta & CSR_INT_BIT_CT_KILL) {
+ IWL_ERR(priv, "Microcode CT kill error detected.\n");
+ priv->isr_stats.ctkill++;
+ handled |= CSR_INT_BIT_CT_KILL;
+ }
+
+ /* Error detected by uCode */
+ if (inta & CSR_INT_BIT_SW_ERR) {
+ IWL_ERR(priv, "Microcode SW error detected. "
+ " Restarting 0x%X.\n", inta);
+ priv->isr_stats.sw++;
+ priv->isr_stats.sw_err = inta;
+ iwl_irq_handle_error(priv);
+ handled |= CSR_INT_BIT_SW_ERR;
+ }
+
+ /* uCode wakes up after power-down sleep */
+ if (inta & CSR_INT_BIT_WAKEUP) {
+ IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
+ iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
+ iwl_txq_update_write_ptr(priv, &priv->txq[0]);
+ iwl_txq_update_write_ptr(priv, &priv->txq[1]);
+ iwl_txq_update_write_ptr(priv, &priv->txq[2]);
+ iwl_txq_update_write_ptr(priv, &priv->txq[3]);
+ iwl_txq_update_write_ptr(priv, &priv->txq[4]);
+ iwl_txq_update_write_ptr(priv, &priv->txq[5]);
+
+ priv->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 |
+ CSR_INT_BIT_RX_PERIODIC)) {
+ IWL_DEBUG_ISR(priv, "Rx interrupt\n");
+ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
+ handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
+ iwl_write32(priv, CSR_FH_INT_STATUS,
+ CSR49_FH_INT_RX_MASK);
+ }
+ if (inta & CSR_INT_BIT_RX_PERIODIC) {
+ handled |= CSR_INT_BIT_RX_PERIODIC;
+ iwl_write32(priv, CSR_INT, CSR_INT_BIT_RX_PERIODIC);
+ }
+ /* Sending RX interrupt require many steps to be done in the
+ * the device:
+ * 1- write interrupt to current index in ICT table.
+ * 2- dma RX frame.
+ * 3- update RX shared data to indicate last write index.
+ * 4- send interrupt.
+ * This could lead to RX race, driver could receive RX interrupt
+ * but the shared data changes does not reflect this.
+ * this could lead to RX race, RX periodic will solve this race
+ */
+ iwl_write32(priv, CSR_INT_PERIODIC_REG,
+ CSR_INT_PERIODIC_DIS);
+ iwl_rx_handle(priv);
+ /* Only set RX periodic if real RX is received. */
+ if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX))
+ iwl_write32(priv, CSR_INT_PERIODIC_REG,
+ CSR_INT_PERIODIC_ENA);
+
+ priv->isr_stats.rx++;
+ }
+
+ if (inta & CSR_INT_BIT_FH_TX) {
+ iwl_write32(priv, CSR_FH_INT_STATUS, CSR49_FH_INT_TX_MASK);
+ IWL_DEBUG_ISR(priv, "Tx interrupt\n");
+ priv->isr_stats.tx++;
+ handled |= CSR_INT_BIT_FH_TX;
+ /* FH finished to write, send event */
+ priv->ucode_write_complete = 1;
+ wake_up_interruptible(&priv->wait_command_queue);
+ }
+
+ if (inta & ~handled) {
+ IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
+ priv->isr_stats.unhandled++;
+ }
+
+ if (inta & ~(priv->inta_mask)) {
+ IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
+ inta & ~priv->inta_mask);
+ }
+
+
+ /* Re-enable all interrupts */
+ /* only Re-enable if diabled by irq */
+ if (test_bit(STATUS_INT_ENABLED, &priv->status))
+ iwl_enable_interrupts(priv);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+}
+
/******************************************************************************
*
@@ -1579,6 +1752,8 @@ static void __iwl_down(struct iwl_priv *priv)
test_bit(STATUS_EXIT_PENDING, &priv->status) <<
STATUS_EXIT_PENDING;
+ /* device going down, Stop using ICT table */
+ iwl_disable_ict(priv);
spin_lock_irqsave(&priv->lock, flags);
iwl_clear_bit(priv, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
@@ -1587,13 +1762,8 @@ static void __iwl_down(struct iwl_priv *priv)
iwl_txq_ctx_stop(priv);
iwl_rxq_stop(priv);
- spin_lock_irqsave(&priv->lock, flags);
- if (!iwl_grab_nic_access(priv)) {
- iwl_write_prph(priv, APMG_CLK_DIS_REG,
- APMG_CLK_VAL_DMA_CLK_RQT);
- iwl_release_nic_access(priv);
- }
- spin_unlock_irqrestore(&priv->lock, flags);
+ iwl_write_prph(priv, APMG_CLK_DIS_REG,
+ APMG_CLK_VAL_DMA_CLK_RQT);
udelay(5);
@@ -1622,6 +1792,49 @@ static void iwl_down(struct iwl_priv *priv)
iwl_cancel_deferred_work(priv);
}
+#define HW_READY_TIMEOUT (50)
+
+static int iwl_set_hw_ready(struct iwl_priv *priv)
+{
+ int ret = 0;
+
+ iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+ CSR_HW_IF_CONFIG_REG_BIT_NIC_READY);
+
+ /* See if we got it */
+ ret = iwl_poll_bit(priv, 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)
+ priv->hw_ready = true;
+ else
+ priv->hw_ready = false;
+
+ IWL_DEBUG_INFO(priv, "hardware %s\n",
+ (priv->hw_ready == 1) ? "ready" : "not ready");
+ return ret;
+}
+
+static int iwl_prepare_card_hw(struct iwl_priv *priv)
+{
+ int ret = 0;
+
+ IWL_DEBUG_INFO(priv, "iwl_prepare_card_hw enter \n");
+
+ iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+ CSR_HW_IF_CONFIG_REG_PREPARE);
+
+ ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
+ ~CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE,
+ CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE, 150000);
+
+ if (ret != -ETIMEDOUT)
+ iwl_set_hw_ready(priv);
+
+ return ret;
+}
+
#define MAX_HW_RESTARTS 5
static int __iwl_up(struct iwl_priv *priv)
@@ -1639,6 +1852,13 @@ static int __iwl_up(struct iwl_priv *priv)
return -EIO;
}
+ iwl_prepare_card_hw(priv);
+
+ if (!priv->hw_ready) {
+ IWL_WARN(priv, "Exit HW not ready\n");
+ return -EIO;
+ }
+
/* If platform's RF_KILL switch is NOT set to KILL */
if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
clear_bit(STATUS_RF_KILL_HW, &priv->status);
@@ -1667,6 +1887,8 @@ static int __iwl_up(struct iwl_priv *priv)
/* clear (again), then enable host interrupts */
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
+ /* enable dram interrupt */
+ iwl_reset_ict(priv);
iwl_enable_interrupts(priv);
/* really make sure rfkill handshake bits are cleared */
@@ -2298,8 +2520,10 @@ static ssize_t show_version(struct device *d,
if (priv->eeprom) {
eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
- pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
- eeprom_ver);
+ pos += sprintf(buf + pos, "NVM Type: %s, version: 0x%x\n",
+ (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
+ ? "OTP" : "EEPROM", eeprom_ver);
+
} else {
pos += sprintf(buf + pos, "EEPROM not initialzed\n");
}
@@ -2478,7 +2702,7 @@ static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
static ssize_t show_qos(struct device *d,
struct device_attribute *attr, char *buf)
{
- struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
+ struct iwl_priv *priv = dev_get_drvdata(d);
char *p = buf;
int q;
@@ -2565,8 +2789,12 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv)
priv->statistics_periodic.data = (unsigned long)priv;
priv->statistics_periodic.function = iwl_bg_statistics_periodic;
- tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
- iwl_irq_tasklet, (unsigned long)priv);
+ if (!priv->cfg->use_isr_legacy)
+ tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
+ iwl_irq_tasklet, (unsigned long)priv);
+ else
+ tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
+ iwl_irq_tasklet_legacy, (unsigned long)priv);
}
static void iwl_cancel_deferred_work(struct iwl_priv *priv)
@@ -2655,6 +2883,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
priv->cfg = cfg;
priv->pci_dev = pdev;
+ priv->inta_mask = CSR_INI_SET_MASK;
#ifdef CONFIG_IWLWIFI_DEBUG
priv->debug_level = priv->cfg->mod_params->debug;
@@ -2705,6 +2934,10 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
(unsigned long long) pci_resource_len(pdev, 0));
IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
+ /* this spin lock will be used in apm_ops.init and EEPROM access
+ * we should init now
+ */
+ spin_lock_init(&priv->reg_lock);
iwl_hw_detect(priv);
IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
priv->cfg->name, priv->hw_rev);
@@ -2713,6 +2946,12 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
* PCI Tx retries from interfering with C3 CPU state */
pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
+ iwl_prepare_card_hw(priv);
+ if (!priv->hw_ready) {
+ IWL_WARN(priv, "Failed, HW not ready\n");
+ goto out_iounmap;
+ }
+
/* amp init */
err = priv->cfg->ops->lib->apm_ops.init(priv);
if (err < 0) {
@@ -2763,8 +3002,9 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_enable_msi(priv->pci_dev);
- err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
- DRV_NAME, priv);
+ iwl_alloc_isr_ict(priv);
+ err = request_irq(priv->pci_dev->irq, priv->cfg->ops->lib->isr,
+ IRQF_SHARED, DRV_NAME, priv);
if (err) {
IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
goto out_disable_msi;
@@ -2821,6 +3061,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
out_free_irq:
free_irq(priv->pci_dev->irq, priv);
+ iwl_free_isr_ict(priv);
out_disable_msi:
pci_disable_msi(priv->pci_dev);
iwl_uninit_drv(priv);
@@ -2902,6 +3143,8 @@ static void __devexit iwl_pci_remove(struct pci_dev *pdev)
iwl_uninit_drv(priv);
+ iwl_free_isr_ict(priv);
+
if (priv->ibss_beacon)
dev_kfree_skb(priv->ibss_beacon);