iwlagn: move ICT code into separate file

All the ICT ISR code is iwlagn specific, and doesn't
need to be in iwlcore. So create a new iwl-agn.h
header file that will hold agn specific function
declarations etc., and move the ICT code into a new
iwl-agn-ict.c file that is linked into iwlagn. This
also gets rid of exporting those symbols.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 0 insertions, 273 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 112149e9b31e..b994eee771a0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -114,8 +114,6 @@ static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
 u32 iwl_debug_level;
 EXPORT_SYMBOL(iwl_debug_level);
 
-static irqreturn_t iwl_isr(int irq, void *data);
-
 /*
  * Parameter order:
  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
@@ -1664,277 +1662,6 @@ int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 }
 EXPORT_SYMBOL(iwl_set_tx_power);
 
-#define ICT_COUNT (PAGE_SIZE/sizeof(u32))
-
-/* Free dram table */
-void iwl_free_isr_ict(struct iwl_priv *priv)
-{
-        if (priv->ict_tbl_vir) {
-                dma_free_coherent(&priv->pci_dev->dev,
-                                  (sizeof(u32) * ICT_COUNT) + PAGE_SIZE,
-                                  priv->ict_tbl_vir, priv->ict_tbl_dma);
-                priv->ict_tbl_vir = NULL;
-        }
-}
-EXPORT_SYMBOL(iwl_free_isr_ict);
-
-
-/* allocate dram shared table it is a PAGE_SIZE aligned
- * also reset all data related to ICT table interrupt.
- */
-int iwl_alloc_isr_ict(struct iwl_priv *priv)
-{
-
-        if (priv->cfg->use_isr_legacy)
-                return 0;
-        /* allocate shrared data table */
-        priv->ict_tbl_vir = dma_alloc_coherent(&priv->pci_dev->dev,
-                                        (sizeof(u32) * ICT_COUNT) + PAGE_SIZE,
-                                        &priv->ict_tbl_dma, GFP_KERNEL);
-        if (!priv->ict_tbl_vir)
-                return -ENOMEM;
-
-        /* align table to PAGE_SIZE boundry */
-        priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
-
-        IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
-                             (unsigned long long)priv->ict_tbl_dma,
-                             (unsigned long long)priv->aligned_ict_tbl_dma,
-                        (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
-
-        priv->ict_tbl =  priv->ict_tbl_vir +
-                          (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
-
-        IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
-                             priv->ict_tbl, priv->ict_tbl_vir,
-                        (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
-
-        /* reset table and index to all 0 */
-        memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
-        priv->ict_index = 0;
-
-        /* add periodic RX interrupt */
-        priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
-        return 0;
-}
-EXPORT_SYMBOL(iwl_alloc_isr_ict);
-
-/* Device is going up inform it about using ICT interrupt table,
- * also we need to tell the driver to start using ICT interrupt.
- */
-int iwl_reset_ict(struct iwl_priv *priv)
-{
-        u32 val;
-        unsigned long flags;
-
-        if (!priv->ict_tbl_vir)
-                return 0;
-
-        spin_lock_irqsave(&priv->lock, flags);
-        iwl_disable_interrupts(priv);
-
-        memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
-
-        val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
-
-        val |= CSR_DRAM_INT_TBL_ENABLE;
-        val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
-
-        IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
-                        "aligned dma address %Lx\n",
-                        val, (unsigned long long)priv->aligned_ict_tbl_dma);
-
-        iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
-        priv->use_ict = true;
-        priv->ict_index = 0;
-        iwl_write32(priv, CSR_INT, priv->inta_mask);
-        iwl_enable_interrupts(priv);
-        spin_unlock_irqrestore(&priv->lock, flags);
-
-        return 0;
-}
-EXPORT_SYMBOL(iwl_reset_ict);
-
-/* Device is going down disable ict interrupt usage */
-void iwl_disable_ict(struct iwl_priv *priv)
-{
-        unsigned long flags;
-
-        spin_lock_irqsave(&priv->lock, flags);
-        priv->use_ict = false;
-        spin_unlock_irqrestore(&priv->lock, flags);
-}
-EXPORT_SYMBOL(iwl_disable_ict);
-
-/* interrupt handler using ict table, with this interrupt driver will
- * stop using INTA register to get device's interrupt, reading this register
- * is expensive, device will write interrupts in ICT dram table, increment
- * index then will fire interrupt to driver, driver will OR all ICT table
- * entries from current index up to table entry with 0 value. the result is
- * the interrupt we need to service, driver will set the entries back to 0 and
- * set index.
- */
-irqreturn_t iwl_isr_ict(int irq, void *data)
-{
-        struct iwl_priv *priv = data;
-        u32 inta, inta_mask;
-        u32 val = 0;
-
-        if (!priv)
-                return IRQ_NONE;
-
-        /* dram interrupt table not set yet,
-         * use legacy interrupt.
-         */
-        if (!priv->use_ict)
-                return iwl_isr(irq, data);
-
-        spin_lock(&priv->lock);
-
-        /* Disable (but don't clear!) interrupts here to avoid
-         * back-to-back ISRs and sporadic interrupts from our NIC.
-         * If we have something to service, the tasklet will re-enable ints.
-         * If we *don't* have something, we'll re-enable before leaving here.
-         */
-        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
-        iwl_write32(priv, CSR_INT_MASK, 0x00000000);
-
-
-        /* Ignore interrupt if there's nothing in NIC to service.
-         * This may be due to IRQ shared with another device,
-         * or due to sporadic interrupts thrown from our NIC. */
-        if (!priv->ict_tbl[priv->ict_index]) {
-                IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
-                goto none;
-        }
-
-        /* read all entries that not 0 start with ict_index */
-        while (priv->ict_tbl[priv->ict_index]) {
-
-                val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
-                IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
-                                priv->ict_index,
-                                le32_to_cpu(priv->ict_tbl[priv->ict_index]));
-                priv->ict_tbl[priv->ict_index] = 0;
-                priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
-                                                     ICT_COUNT);
-
-        }
-
-        /* We should not get this value, just ignore it. */
-        if (val == 0xffffffff)
-                val = 0;
-
-        /*
-         * this is a w/a for a h/w bug. the h/w bug may cause the Rx bit
-         * (bit 15 before shifting it to 31) to clear when using interrupt
-         * coalescing. fortunately, bits 18 and 19 stay set when this happens
-         * so we use them to decide on the real state of the Rx bit.
-         * In order words, bit 15 is set if bit 18 or bit 19 are set.
-         */
-        if (val & 0xC0000)
-                val |= 0x8000;
-
-        inta = (0xff & val) | ((0xff00 & val) << 16);
-        IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
-                        inta, inta_mask, val);
-
-        inta &= priv->inta_mask;
-        priv->inta |= inta;
-
-        /* iwl_irq_tasklet() will service interrupts and re-enable them */
-        if (likely(inta))
-                tasklet_schedule(&priv->irq_tasklet);
-        else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
-                /* Allow interrupt if was disabled by this handler and
-                 * no tasklet was schedules, We should not enable interrupt,
-                 * tasklet will enable it.
-                 */
-                iwl_enable_interrupts(priv);
-        }
-
-        spin_unlock(&priv->lock);
-        return IRQ_HANDLED;
-
- none:
-        /* re-enable interrupts here since we don't have anything to service.
-         * only Re-enable if disabled by irq.
-         */
-        if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
-                iwl_enable_interrupts(priv);
-
-        spin_unlock(&priv->lock);
-        return IRQ_NONE;
-}
-EXPORT_SYMBOL(iwl_isr_ict);
-
-
-static irqreturn_t iwl_isr(int irq, void *data)
-{
-        struct iwl_priv *priv = data;
-        u32 inta, inta_mask;
-#ifdef CONFIG_IWLWIFI_DEBUG
-        u32 inta_fh;
-#endif
-        if (!priv)
-                return IRQ_NONE;
-
-        spin_lock(&priv->lock);
-
-        /* Disable (but don't clear!) interrupts here to avoid
-         *    back-to-back ISRs and sporadic interrupts from our NIC.
-         * If we have something to service, the tasklet will re-enable ints.
-         * If we *don't* have something, we'll re-enable before leaving here. */
-        inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
-        iwl_write32(priv, CSR_INT_MASK, 0x00000000);
-
-        /* Discover which interrupts are active/pending */
-        inta = iwl_read32(priv, CSR_INT);
-
-        /* Ignore interrupt if there's nothing in NIC to service.
-         * This may be due to IRQ shared with another device,
-         * or due to sporadic interrupts thrown from our NIC. */
-        if (!inta) {
-                IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
-                goto none;
-        }
-
-        if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
-                /* Hardware disappeared. It might have already raised
-                 * an interrupt */
-                IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
-                goto unplugged;
-        }
-
-#ifdef CONFIG_IWLWIFI_DEBUG
-        if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
-                inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
-                IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
-                              "fh 0x%08x\n", inta, inta_mask, inta_fh);
-        }
-#endif
-
-        priv->inta |= inta;
-        /* iwl_irq_tasklet() will service interrupts and re-enable them */
-        if (likely(inta))
-                tasklet_schedule(&priv->irq_tasklet);
-        else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
-                iwl_enable_interrupts(priv);
-
- unplugged:
-        spin_unlock(&priv->lock);
-        return IRQ_HANDLED;
-
- none:
-        /* re-enable interrupts here since we don't have anything to service. */
-        /* only Re-enable if diabled by irq  and no schedules tasklet. */
-        if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
-                iwl_enable_interrupts(priv);
-
-        spin_unlock(&priv->lock);
-        return IRQ_NONE;
-}
-
 irqreturn_t iwl_isr_legacy(int irq, void *data)
 {
         struct iwl_priv *priv = data;